158825 project kraken - circular pt1 158825 project kraken ... clients... · the kraken interest...

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THIS DOCUMENT IS IMPORTANT AND REQUIRES YOUR IMMEDIATE ATTENTION. If you are in any doubt as to the action you should take, you are recommended to seek your own personal and independent financial advice from your stockbroker, bank manager, solicitor, accountant or other financial adviser authorised under the Financial Services and Markets Act 2000 (“FSMA”). If you have sold or otherwise transferred all your Ordinary Shares, please pass this document, together with the accompanying form of proxy (“Form of Proxy”), as soon as possible to the purchaser or transferee, or to the person who arranged the sale or transfer so they can pass these documents to the person who now holds the Ordinary Shares. If you have sold only part of your holding of Ordinary Shares, you should retain these documents and consult the bank, stockbroker or other agent through whom the sale was effected. This document should be read as a whole. Your attention is drawn to the letter from your Chairman which is set out on pages 5 to 9 of this document, and which recommends you vote in favour of the resolution to be proposed at the Extraordinary General Meeting referred to below. Your attention is further drawn to the risk factors set out in Part II of this document for a discussion of the risks that affect the value of your shareholding in EnQuest. EnQuest PLC PROPOSED ACQUISITION OF INTERESTS IN UKCS BLOCKS 9/2b, 9/2c, 9/6a AND 9/7b INCLUDING THE KRAKEN FIELD Circular to Shareholders and Notice of Extraordinary General Meeting Notice of an Extraordinary General Meeting of EnQuest PLC to be held at 12.00 noon on 16 July 2012 at the offices of CMS Cameron McKenna LLP, Mitre House, 160 Aldersgate Street, London, EC1A 4DD, United Kingdom is set out at the end of this document. A Form of Proxy for use by Shareholders in connection with this Extraordinary General Meeting is enclosed. Whether or not you propose to attend the Extraordinary General Meeting, please complete and submit the Form of Proxy in accordance with the instructions printed on the enclosed form. To be valid, the Form of Proxy should be completed, signed and returned in accordance with the instructions printed thereon to the Company’s registrar,at the address shown on the Form of Proxy, as soon as possible but in any event must arrive not later than 12.00 noon on 12 July 2012, being 48 working day hours before the time appointed for the holding of the meeting. If you hold your Ordinary Shares in uncertificated form (i.e. in CREST), you may appoint a proxy by completing and transmitting the appropriate CREST message (the “CREST Proxy Instruction”), in accordance with the procedures set out in the CREST Manual, so that it is received by the Registrar (under CREST participant RA10) by no later than 12.00 noon on 12 July 2012. The time of receipt will be taken to be the time from which the Registrar is able to retrieve the message by enquiry to CREST in the manner prescribed by CREST. Shareholders may also register the appointment of a proxy electronically by logging on to www.capitashareportal.com, so that the appointment is received by the Registrar by no later than 12.00 noon on 12 July 2012. Completion and posting of the Form of Proxy or completing and transmitting a CREST Proxy Instruction or appointing a proxy electronically will not prevent you from attending and voting in person at the Extraordinary General Meeting, if you wish to do so. This document is a circular relating to the Proposed Acquisition, which has been prepared in accordance with the Listing Rules. This document has been approved by the Financial Services Authority. Merrill Lynch International, which is authorised and regulated in the United Kingdom by the Financial Services Authority, is acting for EnQuest and no-one else in connection with the Proposed Acquisition and will not be responsible to anyone other than EnQuest for providing the protections afforded to clients of Merrill Lynch International or for providing advice in relation to the Proposed Acquisition or on any other matters referred to herein. 13.3.1(4) 13.3.1(6) I 5.1.1

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THIS DOCUMENT IS IMPORTANT AND REQUIRES YOUR IMMEDIATE ATTENTION. If youare in any doubt as to the action you should take, you are recommended to seek your own personaland independent financial advice from your stockbroker, bank manager, solicitor, accountant or otherfinancial adviser authorised under the Financial Services and Markets Act 2000 (“FSMA”).

If you have sold or otherwise transferred all your Ordinary Shares, please pass this document, together with

the accompanying form of proxy (“Form of Proxy”), as soon as possible to the purchaser or transferee, or to

the person who arranged the sale or transfer so they can pass these documents to the person who now holds

the Ordinary Shares. If you have sold only part of your holding of Ordinary Shares, you should retain these

documents and consult the bank, stockbroker or other agent through whom the sale was effected.

This document should be read as a whole. Your attention is drawn to the letter from your Chairman which is

set out on pages 5 to 9 of this document, and which recommends you vote in favour of the resolution to be

proposed at the Extraordinary General Meeting referred to below. Your attention is further drawn to the risk

factors set out in Part II of this document for a discussion of the risks that affect the value of your

shareholding in EnQuest.

EnQuest PLC

PROPOSED ACQUISITION OF INTERESTS IN UKCS BLOCKS9/2b, 9/2c, 9/6a AND 9/7b INCLUDING THE KRAKEN FIELD

Circular to Shareholders and Notice of Extraordinary General Meeting

Notice of an Extraordinary General Meeting of EnQuest PLC to be held at 12.00 noon on 16 July 2012at the offices of CMS Cameron McKenna LLP, Mitre House, 160 Aldersgate Street, London, EC1A4DD, United Kingdom is set out at the end of this document. A Form of Proxy for use by Shareholdersin connection with this Extraordinary General Meeting is enclosed. Whether or not you propose toattend the Extraordinary General Meeting, please complete and submit the Form of Proxy inaccordance with the instructions printed on the enclosed form. To be valid, the Form of Proxy shouldbe completed, signed and returned in accordance with the instructions printed thereon to theCompany’s registrar, at the address shown on the Form of Proxy, as soon as possible but in any eventmust arrive not later than 12.00 noon on 12 July 2012, being 48 working day hours before the timeappointed for the holding of the meeting.

If you hold your Ordinary Shares in uncertificated form (i.e. in CREST), you may appoint a proxy by

completing and transmitting the appropriate CREST message (the “CREST Proxy Instruction”), in

accordance with the procedures set out in the CREST Manual, so that it is received by the Registrar (under

CREST participant RA10) by no later than 12.00 noon on 12 July 2012. The time of receipt will be taken to

be the time from which the Registrar is able to retrieve the message by enquiry to CREST in the manner

prescribed by CREST. Shareholders may also register the appointment of a proxy electronically by logging

on to www.capitashareportal.com, so that the appointment is received by the Registrar by no later than 12.00

noon on 12 July 2012. Completion and posting of the Form of Proxy or completing and transmitting a

CREST Proxy Instruction or appointing a proxy electronically will not prevent you from attending and

voting in person at the Extraordinary General Meeting, if you wish to do so.

This document is a circular relating to the Proposed Acquisition, which has been prepared in accordance with

the Listing Rules. This document has been approved by the Financial Services Authority.

Merrill Lynch International, which is authorised and regulated in the United Kingdom by the Financial

Services Authority, is acting for EnQuest and no-one else in connection with the Proposed Acquisition and

will not be responsible to anyone other than EnQuest for providing the protections afforded to clients of

Merrill Lynch International or for providing advice in relation to the Proposed Acquisition or on any other

matters referred to herein.

13.3.1(4)

13.3.1(6)

I 5.1.1

Merrill Lynch International accepts no responsibility or liability whatsoever for the contents of this

document, including its accuracy, completeness or verification or for any other statement made or purported

to be made in connection with the Company or the Proposed Acquisition, and nothing in this document is or

shall be relied upon as a promise or representation in this respect, whether as to the past or future. Merrill

Lynch International accordingly disclaims, to the fullest extent permitted by law, all and any responsibility

or liability whether arising in tort, contract or otherwise (save as referred to above) which it might otherwise

have in respect of this document or any such statement.

FORWARD-LOOKING STATEMENTS

This document contains (or may contain) forward-looking statements with respect to certain of EnQuest’s

plans and its current goals and expectations relating to its future financial condition and performance and

which involve a number of risks and uncertainties. EnQuest cautions readers that no forward-looking

statement is a guarantee of future performance and that actual results could differ materially from those

contained in the forward-looking statements. These forward-looking statements can be identified by the fact

that they do not relate only to historical or current facts. Forward-looking statements sometimes use words

such as ‘aim’, ‘anticipate’, ‘target’, ‘expect’, ‘estimate’, ‘intend’, ‘plan’, ‘goal’, ‘believe’, or other words of

similar meaning. Examples of forward-looking statements include, among others, statements regarding

EnQuest’s future financial position, income growth, impairment charges, business strategy, projected levels

of growth in its markets, projected costs, estimates of capital expenditure, and plans and objectives for future

operations of EnQuest and other statements that are not historical fact.

By their nature, forward-looking statements involve risk and uncertainty because they relate to future events

and circumstances, including, but not limited to, UK domestic and global economic and business conditions,

the effects of continued volatility in credit markets, market-related risks such as changes in interest rates and

exchange rates, the policies and actions of governmental and regulatory authorities, changes in legislation,

the further development of standards and interpretations under International Financial Reporting Standards

(“IFRS”) applicable to past, current and future periods, evolving practices with regard to the interpretation

and application of standards under IFRS, the outcome of pending and future litigation, the success of future

acquisitions and other strategic transactions and the impact of competition — a number of which factors are

beyond EnQuest’s control. As a result, EnQuest’s actual future results may differ materially from the plans,

goals, and expectations set forth in EnQuest’s forward-looking statements. See Part II of this document for

further information in relation to risk factors. Any forward-looking statements made herein by or on behalf

of EnQuest speak only as of the date they are made. Except as required by the FSA, the London Stock

Exchange or applicable law, EnQuest expressly disclaims any obligation or undertaking to release publicly

any updates or revisions to any forward-looking statements contained in this document to reflect any changes

in EnQuest’s expectations with regard thereto or any changes in events, conditions or circumstances on

which any such statement is based. Except to the extent required by applicable law, the Listing Rules or the

Disclosure and Transparency Rules, EnQuest will not necessarily update any of them in light of new

information or future events and undertakes no duty to do so.

NOTE REGARDING PRESENTATION OF CURRENCIES

Unless otherwise indicated, all references in this document to “pounds sterling’’ or “£” are to the lawful

currency of the United Kingdom and all references to “$”, “US$”, “US dollars” or “United States dollars”

are to the lawful currency of the United States.

2

TABLE OF CONTENTS

Page

DIRECTORS, SECRETARY, REGISTERED OFFICE AND ADVISERS 4

PART I LETTER FROM THE CHAIRMAN OF ENQUEST PLC 5

PART II RISK FACTORS 10

PART III SUMMARY OF THE PRINCIPAL TERMS OF THE ACQUISITION AGREEMENT 18

PART IV ADDITIONAL INFORMATION 21

PART V COMPETENT PERSON’S REPORT ON THE KRAKEN FIELD, UK NORTH SEA 31

GLOSSARY 65

NOTICE OF EXTRAORDINARY GENERAL MEETING 69

DEFINITIONS 71

EXPECTED TIMETABLE OF KEY EVENTS

Latest time and date for receipt of forms of proxy for the

Extraordinary General Meeting 12.00 noon on 12 July 2012

Extraordinary General Meeting 12.00 noon on 16 July 2012

Expected date of Completion of the Proposed Acquisition 17 July 2012

3

DIRECTORS, SECRETARY, REGISTERED OFFICE AND ADVISERS

Directors James Buckee (Non-Executive Chairman)Amjad Bseisu (Chief Executive)Nigel Hares (Chief Operating Officer)Jonathan Swinney (Chief Financial Officer)Helmut Langanger (Non-Executive Director)Jock Lennox (Non-Executive Director)Clare Spottiswoode (Non-Executive Director)

Company Secretary Paul Waters

Registered Office and Head Office Rex House

4-12 Regent Street

London

SW1Y 4PE

United Kingdom

Sponsor Merrill Lynch International

2 King Edward Street

London

EC1A 1HQ

United Kingdom

CMS Cameron McKenna LLP

160 Aldersgate Street

London

EC1A 4DD

United Kingdom

Advokatfirman Vinge KB

Smålandsgatan 20

Box 1703

S-111 87 Stockholm

Sweden

Competent Person Gaffney, Cline & Associates Limited

Bentley Hall

Blacknest, Alton

Hampshire

GU34 4PU

United Kingdom

Legal Advisers to the Companyas to English Law

Legal Advisers to the Companyas to Swedish Law

I 5.1.4

4

PART I

LETTER FROM THE CHAIRMAN OF ENQUEST PLC

ENQUEST PLC(Incorporated and registered in England and Wales under number 7140891)

Directors: Registered Office:

James Buckee (Non-Executive Chairman) Rex House

Amjad Bseisu (Chief Executive) 4-12 Regent Street

Nigel Hares (Chief Operating Officer) London

Jonathan Swinney (Chief Financial Officer) SW1Y 4PE

Helmut Langanger (Non-Executive Director)Jock Lennox (Non-Executive Director)Clare Spottiswoode (Non-Executive Director)

28 June 2012

Proposed Acquisition of interests in UKCS Blocks 9/2b, 9/2c, 9/6a and 9/7bincluding the Kraken Field and Notice of Extraordinary General Meeting

Dear Shareholder

1. Introduction

On 25 April 2012, EnQuest announced that it has agreed to acquire the Kraken Interest from First Oil for a

total consideration of up to US$144 million by way of a development carry.

The Kraken Interest consists of interests in Blocks 9/2b, 9/2c, 9/6a and 9/7b on the United Kingdom

Continental Shelf. The interests include a 15  per cent. interest in the Kraken Field, a large heavy oil

accumulation contained within UKCS Blocks 9/2b and 9/2c.

Following the Canamens Acquisition and the Nautical Acquisition, which took place earlier this year and

further details of which are set out in paragraphs 6.1, 6.2 and 6.5 of Part IV of this document, EnQuest

currently holds a 45  per cent. equity interest in the Kraken Field. Following the Proposed Acquisition,

EnQuest will hold a 60 per cent. equity interest in the Kraken Field.

In accordance with the Listing Rules, due to the size of the Proposed Acquisition, when aggregated with

EnQuest’s other recent acquisitions of interests in the Kraken Field, in relation to the size of the Company,

the Acquisition is subject to, inter alia, the approval of EnQuest’s Shareholders at an Extraordinary General

Meeting expected to take place on 16 July 2012.

The Board believes that the Proposed Acquisition is in the best interests of EnQuest and its Shareholders as

a whole and seeks your approval of the Resolution to be proposed at the Extraordinary General Meeting. A

Notice convening the Extraordinary General Meeting is set out at the end of this document. The action you

should take to vote on the Resolution and the recommendation of the Board are set out in paragraphs 9 and

11 of this letter.

Shareholders should read the whole of this document and not just rely on the summarised informationcontained within this letter.

2. Background to, and reason for, the Proposed Acquisition

EnQuest aims to become one of the UK’s leading independent oil and gas production and development

companies. The Group operates a production biased portfolio with exposure predominantly to the significant

and low-risk hydrocarbon basin of the UKCS. The Group’s management intends to deliver sustainable

growth in shareholder value by focusing on exploiting its existing reserves, commercialising and developing

I 5.1.4

13.3.1(1)

13.3.1(3)

10.4.1(2)(b)

13.3.1(2)

5

discoveries, converting its significant contingent resources into reserves and pursuing selective acquisitions.

EnQuest intends to achieve its strategy through:

• pro-actively operating its assets;

• maximising production, reserves and cash flow generation from the Group’s existing assets;

• using the Group’s operational, execution, subsurface and integration skills;

• becoming a development partner of choice; and

• delivering balanced growth.

EnQuest therefore uses its operating and technical expertise as well as its financial strength to take advantage

of the significant number of undeveloped discoveries and assets with potential for development in the UKCS,

a large hydrocarbon basin which the Directors believe continues to offer significant potential. The Directors

also believe these skills can be applied internationally.

Furthermore, EnQuest’s strategy for growth has been to re-invest cash generated through its operations into

acquisitions by undertaking farm-ins in discoveries and development projects and making selective

acquisitions of both companies and assets.

EnQuest has focused on obtaining operatorship and high equity interests in the fields in which it participates.

This allows the Group to have a significant influence over field development, production and adjacent

appraisal and exploration activities, and ultimately extract material value from its operated assets.

The Proposed Acquisition of the Kraken Interest will complement the Canamens Acquisition and the

Nautical Acquisition that both occurred in early 2012 by adding a further 15 per cent. equity interest to

EnQuest’s existing 45 per cent. equity interest in the Kraken Field, taking its aggregate equity interest in the

Kraken Field to 60 per cent. Furthermore, at completion of the Proposed Acquisition, First Oil (as the seller

of the Kraken Interest) has irrevocably agreed to approve the appointment of EnQuest Dons (a wholly owned

subsidiary of EnQuest) as the operator of Licence P.1077 and, following completion of the Proposed

Acquisition, support the appointment of EnQuest Dons as the operator of Licence P.1575.

Following the Proposed Acquisition, the EnQuest Group’s operatorship and high equity interest in the

Kraken Field will ensure that the EnQuest Group has significant influence over the field development and

subsequent production in the Kraken Field and over appraisal and exploration activities in adjacent areas.

The Directors believe that the Proposed Acquisition will complement EnQuest’s key strengths and further its

stated strategy.

3. Information on the Kraken Interest

The Kraken Interest consists of interests in Blocks located in the East Shetland basin, in an area to the west

of the North Viking Graben.

The Kraken Field is one of the largest identified undeveloped oil fields in the UK North Sea and is being

progressed to development following successful appraisal and well test results.

The gross 2C contingent resources for the Kraken Field are estimated by GCA to be 172 MMbbl and

therefore the Proposed Acquisition will deliver a further 26 MMbbl of 2C contingent resources net to the

Enlarged Group, increasing EnQuest’s net 2C contingent resources in the Kraken Field, as estimated by

GCA, from 77 MMbbl to 103 MMbbl.

The most recent and first horizontal well 9/02b-5z in the Kraken Field was drilled and tested at a stabilised

rate of 4,000 bopd and a series of flow and build-up periods were conducted up to a maximum flow rate of

4,500 bopd. At the same time the viscosity was measured at 162 centipoise. This, together with the flow

rates, gave the management of EnQuest significant comfort that a viable new development could be

progressed.

10.4.1(2)(f)

6

The Proposed Acquisition will also enable the Enlarged Group to exercise the option, granted in the Nautical

Acquisition, to acquire a further 5 per cent. interest in UKCS Block 9/1a (known as the Ketos discovery).

This option grants the Enlarged Group the right to acquire an interest in Licence P.1759 and a percentage

interest in Block 9/1a equal to the Enlarged Group’s interest in Block 9/2 (up to a maximum of 50 per cent.).

Currently, the Enlarged Group’s interest in Block 9/2 is 45 per cent.; following the Proposed Acquisition, the

Enlarged Group’s interest in Block 9/2 will be 60 per cent. and therefore this option will enable the Enlarged

Group to exercise the option to obtain the maximum 50 per cent. interest in Block 9/1a. Further analysis of

the 3D seismic data in relation to the Ketos discovery is required with the potential to drill further wells.

Please refer to paragraph 6.5 of Part IV of this document for further details of this option and the Nautical

Acquisition.

UKCS Blocks 9/6a and 9/7b are exploration Blocks and no resources have been discovered in these areas to

date, although the Blocks provide potential for exploration drilling in the future.

Please refer to GCA’s Competent Person’s Report, contained at Part V of this document, for further details

of the Kraken Interest.

4. Principal Terms of the Proposed Acquisition

On 25 April 2012, EnQuest Dons, a wholly owned subsidiary of the Company, entered into a conditional

farm-in agreement with First Oil to acquire a 15  per cent. interest in each of Block 9/2b, Block 9/2c,

Block 9/6a and Block 9/7b of the UKCS (together with interests in the P.1077 and P.1575 Licences and

documents related to the P.1077 and P.1575 Licences).

The interests acquired include a 15 per cent. interest in the Kraken Field which, together with the Group’s

existing 45 per cent. interest, following Completion, will give the Group an aggregate 60 per cent. interest

in the Kraken Field.

In accordance with the Listing Rules, due to the size of the Proposed Acquisition, when aggregated with the

recent acquisition of interests in the Kraken Field as part of the Canamens Acquisition and the Nautical

Acquisition, the Proposed Acquisition is subject to Shareholder approval. It is also conditional, among other

things, on approval by the Secretary of State and other third party consents. Approval is currently expected

to be received from the Secretary of State on or around 13 July 2012.

In consideration of the transfer of the Kraken Interest, EnQuest Dons shall pay certain costs which would

otherwise be borne by First Oil as holder of its remaining 15 per cent. participating interest in Licences

P.1077 and P.1575 up to a maximum of US$144 million. The amount payable by EnQuest Dons is dependent

on a future determination of the gross 2P reserves in the Kraken Field. If the determination is less than or

equal to 100 MMboe, EnQuest will only pay US$90 million, by way of development carry. If the

determination is less than 166 MMboe, but more than 100 MMboe, then the amount of the development

carry will be increased by up to a further US$54 million, calculated on a linear pro-rata basis. EnQuest will

pay the maximum of US$144 million if the future determination of gross 2P reserves is equal to or greater

than 166 MMboe.

The effect of the structure of the consideration payable by EnQuest Dons is such that EnQuest Dons will not

be committed to paying a significant part of the consideration until the Secretary of State’s approval of the

field development plan in respect of the Kraken Field has been obtained and a viable development project

has been formulated. Therefore, considerable flexibility is maintained for EnQuest without having to commit

significant amounts of funding.

At Completion, EnQuest shall be obliged to guarantee to First Oil the obligations and liabilities of EnQuest

Dons under the Acquisition Agreement.

The Acquisition Agreement contains warranties that in terms of scope are customary for a transaction of this

nature.

Further details of the Acquisition Agreement are set out in Part III of this document.

10.4.1(2)(a)

10.4.1(2)(c)

7

5. Financing the Proposed Acquisition

The Proposed Acquisition is not conditional on EnQuest obtaining funds to finance the Proposed

Acquisition.

The consideration for the Proposed Acquisition will be satisfied through EnQuest’s existing cash balances,

generated cashflow and the Facility Agreement.

On 6 March 2012, EnQuest entered into the Facility Agreement, which is a secured and guaranteed

multicurrency revolving credit facility, the aggregate commitments of which start at US$525 million but may

be increased, with the agreement of the lenders, to US$900 million. The facilities are provided by Lloyds

TSB Bank plc, BNP Paribas, Barclays Corporate, The Royal Bank of Scotland Plc, Banc of America

Securities Limited and Credit Agricole Corporate Investment Bank (as mandated lead arrangers), NIBC

Bank N.V. (as lead arranger) and Lloyds TSB Bank Plc (as facility agent). Further details of the Facility

Agreement are set out in paragraph 6.6 of Part IV of this document.

6. EnQuest Current Trading and Prospects

The Group’s production from 1 January to 30 April 2012 averaged 20,976 Boepd, in line with expectations.

The Directors anticipate that the average for the full 2012 calendar year will be 20,000 to 24,000 Boepd.

Amjad Bseisu, the chief executive of the Company, stated in EnQuest’s interim management statement

released on 18 May 2012:

“We have had a busy 2012 to date, with three transactions giving us a 60 per cent. working interest in theexciting Kraken development as well as the purchase of an additional 18.5  per cent. of West Don. Ourproduction for 2012 is going according to plan and the Alma/Galia development is on schedule. Today, weare announcing further additions to our growing pipeline of potential developments, with an increase in ourposition in the Kildrummy discovery from 40 per cent. to 60 per cent. and in the Cairngorm discovery from50 per cent. to 100 per cent.”

“Our production continues to drive our earnings and cash flow, putting us in a good position to takeadvantage of further business development opportunities as they arise.”

7. Risk Factors

Shareholders should consider fully and carefully the risk factors associated with the Proposed Acquisition

and the operations of the Enlarged Group. Your attention is drawn to the risk factors set out in Part II of this

document.

8. Notice of Extraordinary General meeting

In accordance with the Listing Rules, the Proposed Acquisition is conditional on, amongst other things, the

approval of the Shareholders. A Notice convening the Extraordinary General Meeting in relation to the

Proposed Acquisition to be held at 12.00 noon on 16 July 2012 at the offices of CMS Cameron McKenna

LLP, Mitre House, 160 Aldersgate Street, London, EC1A 4DD, United Kingdom is set out at the end of this

document. At this meeting the Resolution will be proposed for the purpose of approving the Proposed

Acquisition.

9. Action to be taken

You will find enclosed with this document a Form of Proxy for use at the Extraordinary General Meeting.

Whether or not you propose to be present at the Extraordinary General Meeting, you are requested to

complete and sign the Form of Proxy, in accordance with the instructions printed thereon, and return it to the

Company’s registrars, at the address shown on the Form of Proxy, to arrive as soon as possible and, in any

event, not later than 12.00 noon on 12 July 2012.

10.4.1(2)(c)

I.12

8

10. Additional information

Your attention is drawn to the additional information set out in Part IV of this document and to the Notice

of Extraordinary General Meeting set out at the end of this document.

11. Recommendation

Your Board considers that the Proposed Acquisition is in the best interests of Shareholders taken as a whole

and unanimously recommends that Shareholders vote in favour of the Resolution to be proposed at the

Extraordinary General Meeting, as the Directors each intend to do in respect of their own beneficial holdings

which, as at 27 June 2012, amounted in total to 75,202,322 Ordinary Shares, representing approximately

9.37 per cent. of the issued share capital of the Company.

Yours sincerely,

James Buckee

Chairman

13.3.1(5)

9

10

PART II

RISK FACTORS

The following risk factors should be considered carefully when deciding whether or not to vote in favour ofthe Resolution to be proposed at the Extraordinary General Meeting. The risk factors should be read inconjunction with all other information relating to the Proposed Acquisition and the Enlarged Groupcontained in this document. The risks and uncertainties set out below are those which the Directors believeare the material risks relating to the Proposed Acquisition and to the Enlarged Group and their markets. Ifany or a combination of these risks actually materialise, the business, operations, financial conditions andprospects of the Group and, following Completion of the Proposed Acquisition, the Enlarged Group asappropriate could be materially and adversely affected. The following is not exhaustive and does not purportto be a complete explanation of all the risks involved. Additional risks and uncertainties not presently knownto the Directors, or which the Directors currently consider to be immaterial, may also have a materialadverse effect on the Proposed Acquisition and on the Enlarged Group if they materialise. If any of the risksactually materialise, the market price of the EnQuest Shares could decline and you may lose all or part ofyour investment.

RISKS RELATING TO THE PROPOSED ACQUISITION

The Proposed Acquisition may fail to realise anticipated benefits

There can be no guarantee that the Enlarged Group will realise any or all of the anticipated benefits of the

Proposed Acquisition, either in a timely manner or at all. The process of estimating resources that may be

developed and produced with respect to the Kraken Interest is based on volumetric calculations and

analogies to similar types of fields. As a result, the estimation of the resources at the Kraken Interest may be

materially inaccurate. If this is the case, and the Enlarged Group has incurred significant costs, this could

have a material adverse impact on the business, results of operation and the financial condition of the

Enlarged Group.

Estimates of resources and forward looking statements

The resources data and forward looking statements contained in this document in respect of the Kraken

Interest are estimates only and should not be construed as representing exact quantities. They are based on

ownership, geophysical, geological and engineering data, and other information assembled by EnQuest, as

well as EnQuest’s assumptions based on its experience in developments of a similar nature. The estimates

may prove to be incorrect and potential investors should not place undue reliance on the forward-looking

statements contained in this document concerning the Kraken Interest’s resources. If the assumptions upon

which the estimates for the Kraken Interest’s hydrocarbon resources prove to be incorrect, the Enlarged

Group may be unable to recover and produce the estimated levels or quality of hydrocarbons and the

Enlarged Group’s business, prospects, financial condition or results of operations could be materially

adversely affected.

The Proposed Acquisition may not complete

The implementation of the Proposed Acquisition is subject to the satisfaction (or waiver, where applicable)

of a number of conditions, including:

• the receipt of a consent from the Secretary of State for the Department of Energy and Climate Change

to the assignment of the Kraken Interest;

• the receipt of all necessary third party consents; and

• the approval, as a class 1 transaction, of the Proposed Acquisition by the Shareholders in accordance

with the rules of the UKLA and the London Stock Exchange.

I.4

There is no guarantee that these (or other) conditions will be satisfied (or waived, if applicable), in which

case the Proposed Acquisition will not be completed. The conditions are more fully described in Part III of

this document.

The Kraken Interest will be subject to a right of re-transfer to First Oil for a specified time followingcompletion of the Proposed Acquisition

The Enlarged Group’s ownership of the Kraken Interest will in certain circumstances be subject to a right of

re-transfer to First Oil in the event, inter alia, where a field development plan has not been submitted by

31 December 2013 or such other date as the parties may agree acting reasonably. Further details of the

Acquisition Agreement are provided in Part III of this document.

Failure to have a field development plan approved

The field development plan relating to the Kraken Interest that must be submitted is required to be approved

by the Secretary of State. There is no certainty at this stage that the Secretary of State will approve this field

development plan.

The Enlarged Group may not be able to develop commercially the Kraken Interest’s contingentresources

The process of estimating oil and gas resources is complex and involves a high degree of uncertainty. The

resources relating to the Kraken Interest set out in this document represent estimates only. In general,

estimates of the quantity of recoverable oil and gas are based upon a number of variable factors and

assumptions, such as ability to recover resources, interpretation of geological and geophysical data, timing

and amount of capital expenditures, marketability of oil and gas, continuity of current fiscal policies and

regulatory regimes, future oil and gas prices, operating costs, development and production costs, all of which

may vary from actual results. Estimates involve subjective judgments and determinations and are also to

some degree speculative. Classification of resources is an assessment of the chance of commerciality.

The Kraken Interest’s contingent resources have been determined according to the guidelines and definitions

of the SPE PRMS. Under SPE PRMS, contingent resources are those deposits that are estimated, on a given

date, to be potentially recoverable from known accumulations but that are not currently considered

commercially recoverable. The resources may not be considered commercially recoverable by the Enlarged

Group for a variety of reasons, including the costs involved in recovering the contingent resources, the price

of oil at the time, the availability of the Enlarged Group’s resources and other development plans that the

Enlarged Group may have. The Enlarged Group’s estimates of its contingent resources are uncertain and can

change with time and there can be no guarantee that the Enlarged Group will be able to develop the Kraken

Field resources commercially.

The Kraken Field development is dependent on the availability of infrastructure and third partycontractors

The Kraken Field development, as with all production, development and exploration activities, will be,

should the field development plan be approved by the Secretary of State, dependent on the availability of

drilling equipment and offshore services, including third party services in the North Sea. The Group

contracts or leases (and following Completion and the Secretary of State’s approval of the field development

plan the Enlarged Group shall continue to contract and lease) services and equipment from third party

providers and suppliers. Such equipment and services may be scarce and may not be readily available at the

times and places required. Even where the Enlarged Group has secured rigs under a contract, the rigs will

usually only be available for use after the current user has finished its drilling programme. If there are delays

in the completion of the user’s drilling programme, the Enlarged Group could be delayed in procuring

contracted rigs. Under the terms of its licences, the Enlarged Group may have a commitment to drill within

a certain time frame. The Enlarged Group, therefore, risks losing licences if it is delayed in obtaining rigs

and thus meeting its drilling commitments. Shortages or the high cost of drilling rigs, equipment, supplies,

personnel or oilfield services could delay or adversely affect the Enlarged Group’s production, development

11

and exploration operations, which could have a material adverse effect on its business, financial condition or

results of operations.

The scarcity of third party services and equipment as well as any increases in their costs, together with the

failure of a third party provider or supplier to perform its contractual obligations, or an inability to achieve

a commercially viable contract with a third party provider or supplier could delay, restrict or lower the

profitability and viability of the activities related to the Kraken Field. This could have a material adverse

impact on the Enlarged Group’s business, the results of operations or financial condition.

RISKS RELATING TO THE OIL AND GAS INDUSTRY AND THE COUNTRIES IN WHICH THEENLARGED GROUP OPERATES

A material decline in oil and gas prices may adversely affect the Enlarged Group’s results ofoperations and financial condition

Both oil and gas prices can be volatile and subject to fluctuation due to a variety of factors beyond the

Enlarged Group’s control. Any material decline in oil prices could result in a reduction of the Enlarged

Group’s net production revenue. Historically, oil prices have fluctuated widely for many reasons, including

global and regional supply and demand, and expectations regarding future supply and demand for oil and

petroleum products; geopolitical uncertainty; access to pipelines, tanker ships and other means of

transporting oil, gas and petroleum products; price, availability and government subsidies of alternative

fuels; price and availability of new technologies; the ability of the members of OPEC and other oil-producing

nations to set and maintain specified levels of production and prices; political, economic and military

developments in oil producing regions, particularly the Middle East; domestic and foreign governmental

regulations and actions, including export restrictions, taxes, repatriations and nationalisations; global and

regional economic conditions; and weather conditions and natural disasters.

It is impossible to predict accurately future oil and gas price movements. Accordingly, oil and gas prices may

not remain at their current levels. The economics of producing from some of the Enlarged Group’s wells may

change as a result of lower prices, which could result in a reduction in the volumes of the Enlarged Group’s

reserves if some are no longer economically viable to develop. The Enlarged Group might also elect not to

produce from certain wells at lower prices. All of these factors could result in a material decrease in the

Enlarged Group’s net production revenue adversely affecting its acquisition, development and exploration

activities and financial condition.

Under IFRS, the net capitalised cost of oil and gas properties may not exceed their recoverable amount which

is based, in part, upon estimated future net cash flows from oil and gas reserves. If the net capitalised costs

exceed this limit, the Enlarged Group must charge the amount of the excess against earnings. If oil or gas

prices were to decline, the Enlarged Group’s net capitalised cost of oil and gas properties may approach or

exceed their recoverable amount, resulting in a charge against earnings.

The Enlarged Group’s success depends on its ability to appraise, develop and explore oil and gasreserves that are economically recoverable

The Enlarged Group’s long-term commercial success depends on its ability to appraise, develop, explore and

commercially produce oil and gas reserves. The Enlarged Group must continually locate and develop or

acquire new reserves to replace its existing reserves that are being depleted by production. Future increases

in the Enlarged Group’s reserves will depend not only on its ability to appraise, develop and explore its

existing assets but also on its ability to select and acquire suitable additional assets either through awards at

licensing rounds or through acquisitions. There are many reasons why the Enlarged Group may not be able

to find or acquire oil and gas reserves or develop them for commercially viable production. For example, the

Enlarged Group may be unable to negotiate commercially reasonable terms for its acquisition, appraisal,

development or production activities. Factors such as adverse weather conditions, natural disasters,

equipment or services shortages, procurement delays or difficulties arising from the political, environmental

and other conditions in the areas where the reserves are located or through which the Enlarged Group’s

products are transported may increase costs and make it uneconomical to develop potential reserves. Without

successful exploration or acquisition activities, the Enlarged Group’s reserves, production and revenues will

12

decline. There is no assurance that the Enlarged Group will discover, acquire or develop further commercial

quantities of oil and gas.

Appraisal and exploration projects do not necessarily result in a profit on the investment or therecovery of costs

Appraisal and exploration activities are capital intensive and inherently uncertain in their outcome. The

Enlarged Group’s future oil and gas appraisal and exploration projects may involve unprofitable efforts,

either from dry wells or from wells that are productive but do not produce sufficient net revenues to return

a profit after development, operating and other costs. Completion of a well does not guarantee a profit on the

investment or recovery of the costs associated with that well. In addition, drilling hazards or environmental

damage could greatly increase the cost of operations, and various field operating conditions may adversely

affect the production from successful wells. These conditions include delays in obtaining governmental

approvals or consents, shut-ins of connected wells resulting from extreme weather conditions, insufficient

storage or transportation capacity, or adverse geological conditions. For additional risks in conducting

appraisal and development activities, please see the risk factor “The Enlarged Group’s offshore operationsare subject to a number of risks and hazards that may result in material losses in excess of insuranceproceeds” below. While diligent well supervision and effective maintenance operations can contribute to

maximising production rates over time, production delays and declines from normal field operating

conditions cannot be eliminated and may adversely affect the Enlarged Group’s revenues and cash flows.

The Enlarged Group’s offshore operations are subject to a number of risks and hazards that mayresult in material losses in excess of insurance proceeds

Oil and gas development, production and exploration operations are inherently risky and hazardous. Risks

typically associated with these operations include unexpected formations or pressures and premature decline

of reservoirs. Losses resulting from the occurrence of any of these risks could have a material adverse effect

on the Enlarged Group’s financial position, results of operations and prospects. Hazards typically associated

with offshore oil and gas production, development and exploration operations include fires, explosions,

blowouts, marine perils, including severe storms and other adverse weather conditions, vessel collisions, gas

leaks and oil spills, each of which could result in substantial damage to oil and gas wells, production

facilities, other property and the environment or in personal injury. Oil and gas installations are also known

to be likely objects, and even targets, of military operations and terrorism.

Although the Group obtains insurance prior to drilling in accordance with industry standards to cover certain

of these risks and hazards, insurance is subject to limitations on liability and, as a result, may not be sufficient

to cover all of the Enlarged Group’s losses. In addition, the risks or hazards associated with the Enlarged

Group’s offshore operations may not in all circumstances be insurable or, in certain circumstances, the

Enlarged Group may elect not to obtain insurance to deal with specific events due to the high premiums

associated with such insurance or for other reasons. The Group does not currently have business interruption

insurance in place and, therefore, it will suffer losses as a result of a shut-in or cessation in production. The

occurrence of a significant event against which the Enlarged Group is not fully insured, or the insolvency of

the insurer of such event, could have a material adverse effect on the Enlarged Group’s financial position,

results of operations and prospects.

The Enlarged Group’s business is subject to government regulation with which it may be difficult tocomply and which may change

The Enlarged Group’s oil and gas exploration and production operations are principally subject to the laws

and regulations of the United Kingdom, including those relating to health and safety and the production,

pricing and marketing of oil and gas. In addition, the Enlarged Group will be subject to laws affecting foreign

ownership, government participation, taxation, royalties, duties, rates of exchange and exchange control. In

order to conduct its operations in compliance with these laws and regulations, the Enlarged Group must

obtain licences and permits from various government authorities. The grant, continuity and renewal of the

necessary approvals, permits, licences and contracts, including the timing of obtaining such licences and the

terms on which they are granted, are subject to the discretion of the relevant governmental and local

13

authorities in the United Kingdom and cannot be assured. In addition, the Enlarged Group may incur

substantial costs in order to maintain compliance with these existing laws and regulations and additional

costs if these laws are revised or if new laws affecting the Enlarged Group’s operations are passed.

The Enlarged Group’s operations expose it to significant compliance costs and liabilities in respect ofHSE matters

The Enlarged Group’s operations and assets are affected by numerous international, European Union and

national laws and regulations concerning HSE matters including, but not limited to, those relating to

discharges of hazardous substances into the environment, the handling and disposal of waste and the health

and safety of employees. The technical requirements of these laws and regulations are becoming increasingly

complex, stringently enforced and expensive to comply with and this trend is likely to continue. The failure

to comply with current HSE laws and regulations may result in regulatory action, the imposition of fines or

the payment of compensation to third parties which each could in turn have a material adverse effect on the

Enlarged Group’s business, financial condition and results of operations.

Certain HSE laws provide for strict, joint and several liability without regard to negligence or fault for natural

resource damages, health and safety, remediation and clean-up costs of spills and other releases of hazardous

substances, and such laws may impose liability for personal injury or property damage as a result of exposure

to hazardous substances. Further, such HSE laws and regulations may expose the Enlarged Group to liability

for the conduct of others or for acts that complied with all applicable HSE laws when they were performed.

In addition, the enactment of new HSE laws or regulations or stricter enforcement or new interpretations of

existing HSE laws or regulations could have a significant impact on the Enlarged Group’s operating or

capital costs and require further expenditure to modify operations, upgrade employee and contractor

accommodation as other infrastructure, install pollution control equipment, perform clean-up operations,

curtail or cease certain operations, or pay fines or make other payments for pollution, discharges or other

breaches of HSE requirements. There can be no assurances that the Enlarged Group will be able to comply

with such HSE laws in the future. The failure to comply with such HSE laws or regulations could result in

substantial costs and/or liabilities to third parties or government entities which could have a material adverse

effect on the Enlarged Group’s business, financial condition and results of operations.

The Offshore Combustion Installations (Prevention and Control of Pollution) Regulations 2001 (the “PPC”)

have been implemented in the UK and apply to the Heather and Thistle platforms and the Northern Producer

FPF. Permits under the PPC have been issued to the Group by the DECC in 2009. Applications for these PPC

permits normally contain an energy efficiency survey. Energy efficiency surveys that the Group has

conducted as part of the PPC application process have identified potential energy efficiency measures and

other upgrades to the installations that may be implemented by the Enlarged Group, which have been built

into the assets’ life-of-field opportunity registers maintained by the Enlarged Group, for future investment

opportunities for improved performance. The costs associated with the PPC permit compliance and other

measures to be undertaken are material for the Enlarged Group.

All of these factors may lead to delayed or reduced production, development and exploration activity as well

as to increased costs.

Future legislation may require further reductions of greenhouse gas emissions and discharges of oil inproduced waters

The United Kingdom is a signatory to the United Nations Framework Convention on Climate Change and

has ratified the Kyoto Protocol established thereunder to set legally binding targets to reduce nationwide

emissions of carbon dioxide, methane, nitrous oxide and other so called “greenhouse gases”.

Due to the requirements of the European Union’s Emissions Trading Scheme (the “EU ETS”), Member

States’ governments have put forward national plans that set carbon dioxide emission reduction requirements

for various industrial activities. For the current phase of the EU ETS (Phase II, running from 2008 to 2012),

these activities include offshore oil and gas exploration and production facilities incorporating combustion

plants (including flaring) with aggregate thermal ratings of greater than 20 megawatts (thermal input).

14

Currently the majority of allowances for emissions under Phase  II EU ETS are allocated to individual

installations free of charge based on forecast emissions. If the Enlarged Group’s verified emissions are less

than its prescribed allocation, then it may sell its excess allocations by means of a market auction. However,

if the Enlarged Group’s verified emissions from an installation exceed its allocated allowances, then it will

have to purchase extra allowances to cover those excess emissions from the market.

Phase III of the EU ETS will run from 2013 to 2020. In Phase III an increasing level of an installation’s

allowances will have to be purchased at market auctions, as a result of Directive 2009/29/EC of the European

Parliament and of the Council of 23  April 2009. Furthermore, the number of allowances available to

installations will decrease and allocations will be managed centrally by the EU rather than by Member

States. The costs of these allowances is built into the life-of-field cost forecasts.

Controls on the quantities of oil that can be discharged in process waters in the course of offshore operations

have been implemented in the UK by the Offshore Petroleum Activities (Oil Pollution Prevention and

Control) Regulations 2005 (the “OPPC”). Future compliance by the Heather and Thistle platforms and the

Northern Producer FPF with the OPPC may require material expenditure by the Enlarged Group if the

Enlarged Group is required to modify its operations.

The Enlarged Group operates in a competitive industry

The oil and gas industry is competitive in all its phases. The Enlarged Group’s ability to increase reserves in

the future will depend not only on its ability to exploit and develop its present assets but also on its ability

to select and acquire suitable producing assets or prospects for appraisal or exploratory drilling.

The Enlarged Group competes with numerous other participants in the search for and the acquisition of oil

and gas assets, and in the marketing of oil and gas. The Enlarged Group’s competitors include major

international oil and gas companies that may have substantially greater financial and technical resources,

staff and facilities than those of the Enlarged Group. These companies have strong market power as a result

of several factors, including the diversification and reduction of risk, including geological, price and

currency risks; increased financial strength facilitating major capital expenditures; greater integration and the

exploitation of economies of scale in technology and organisation; strong technical experience; increased

infrastructure and reserves; and strong brand recognition. Due to this competitive environment, the Enlarged

Group may be unable to acquire attractive, suitable assets or prospects on terms that it considers acceptable.

As a result, the Enlarged Group’s revenues may decline over time, thereby materially and adversely affecting

its business, results of operations and financial condition.

The Enlarged Group’s tax liability could increase substantially as a result of changes in, or newinterpretations of, tax laws in the United Kingdom

The Enlarged Group will be subject to taxation in the United Kingdom and is faced with increasingly

complex tax laws. The amount of tax the Enlarged Group pays could increase substantially as a result of

changes in, or new interpretations of, these laws, which could have a material adverse effect on its liquidity

and results of operations. During periods of high profitability in the oil and gas industry, there are often calls

for increased or windfall taxes on oil and gas revenue. Taxes have increased or been imposed in the past and

may increase or be imposed again in the future. In addition, taxing authorities could review and question the

Enlarged Group’s tax returns leading to additional taxes and penalties which could be material.

Macroeconomic risks could result in an adverse impact on the Enlarged Group’s financial condition

One of the principal uncertainties for the Enlarged Group at present is the extent to which the global

economic slowdown currently being experienced may feed through into the Enlarged Group’s operations,

and the timing of that impact. The links between economic activities in different markets and sectors are

complex and depend not only on direct drivers such as the balance of trade and investment between

countries, but also on domestic monetary, fiscal and other policy responses to address macroeconomic

conditions.

15

RISKS RELATING TO THE GROUP AND, FOLLOWING COMPLETION, THE ENLARGEDGROUP

Risks relating to the Group and, following Completion, the Enlarged Group and its business

The Enlarged Group cannot accurately predict its future decommissioning liabilities

The Group, through its licence interests, has in the past assumed certain obligations in respect of the

decommissioning of its fields and related infrastructure and the Enlarged Group is expected to assume

additional decommissioning liabilities in respect of its future operations. These liabilities are derived from

legislative and regulatory requirements concerning the decommissioning of wells and production facilities

and require the Enlarged Group to make provision for and/or underwrite the liabilities relating to such

decommissioning. The oil and gas industry currently has little experience of decommissioning petroleum

infrastructure on the UKCS as few such structures have been removed in these regions. Although, the

Enlarged Group’s accounts make a provision for such decommissioning costs, there can also be no

assurances that the costs of decommissioning will not exceed the value of the long-term provision set aside

to cover such decommissioning costs. It is, therefore, difficult to forecast accurately the costs that the

Enlarged Group will incur in satisfying its decommissioning obligations and the Enlarged Group may have

to draw on funds from other sources to bear such costs. When its decommissioning liabilities crystallise, the

Enlarged Group will be jointly and severally liable for them with other former or current partners in the field.

In the event that other partners default on their obligations, the Enlarged Group will remain liable and its

decommissioning liabilities could be magnified significantly through such default. Any significant increase

in the actual or estimated decommissioning costs that the Enlarged Group incurs may adversely affect its

financial condition.

Actions of joint venture partners

Oil and gas operations globally are often conducted in a joint venture environment. Non-alignment on

various strategic decisions in joint ventures may result in operational or production inefficiencies or delay.

Where the Enlarged Group is operator, the Enlarged Group depends on its partners to meet their contractual

obligations in respect of “cash calls” and any failure to do so could have a material adverse impact on the

Enlarged Group’s operations.

Business acquisitions – integration and other issues

Part of EnQuest’s strategy is or, following the Proposed Acquisition, part of the Enlarged Group’s strategy

will be to increase oil and gas resources through strategic business acquisitions. Risks commonly associated

with acquisitions of companies or businesses include integrating the operations and personnel of the acquired

business, problems with minority shareholders in acquired companies, the potential disruption of EnQuest’s

or the Enlarged Group’s own business, the possibility that indemnification agreements with the sellers may

be unenforceable or insufficient to cover potential liabilities and difficulties arising out of integration.

Risks relating to the Enlarged Group’s financial condition

Exchange rate fluctuations and devaluations could have a material adverse effect on the EnlargedGroup’s results of operations

Currency exchange rate fluctuations and currency devaluations could have a material adverse effect on the

Enlarged Group’s results of operations from time to time. As the Enlarged Group’s reporting currency is the

US dollar but it predominantly incurs operating expenses in pounds sterling, a depreciation of the US dollar

against sterling adversely affects the Enlarged Group’s reported results of operations. Although the Enlarged

Group may undertake limited hedging activities on capital expenditure in an attempt to reduce certain

currency fluctuation risks, these activities provide only limited protection against currency-related losses. In

addition, in some circumstances hedging activities may require the Enlarged Group to make cash outlays.

16

Risks relating to the Enlarged Group’s structure

The holding company structure means that the Company’s ability to pay dividends is dependent ondistributions received from its subsidiaries

Since the Company is a holding company, its operating results and financial condition are entirely dependent

on the performance of members of the Enlarged Group. Although there is no current intention to pay

dividends, the Company’s ability to pay dividends in the future will depend on the level of distributions, if

any, received from the Company’s subsidiaries. The ability of the Company’s subsidiaries to make

distributions to the Company may, from time to time, be restricted as a result of several factors, including

restrictive covenants in loan agreements, foreign exchange limitations, the requirements of applicable law

and regulatory, fiscal or other restrictions.

Participation by the Company in a distribution of a subsidiary’s assets will generally be subject to priorclaims of creditors

The Company holds all of its assets in its subsidiaries. The Company’s rights to participate in a distribution

of its subsidiaries’ assets upon their liquidation, re-organisation or insolvency is generally subject to prior

claims of the subsidiaries’ creditors, including any trade creditors and preferred shareholders.

17

PART III

SUMMARY OF THE PRINCIPAL TERMS OF THE ACQUISITION AGREEMENT

1. Introduction

On 25 April 2012, EnQuest Dons, a wholly owned subsidiary of the Company, entered into a conditional

farm-in agreement (the “Acquisition Agreement”) with First Oil to acquire the Kraken Interest. The

principal terms of the Acquisition Agreement are set out below.

2. Structure of the Proposed Acquisition

Pursuant to the Acquisition Agreement, First Oil transfers to EnQuest Dons:

• an undivided legal interest in Licence P.1077 and Licence P.1575;

• a 15 per cent. interest in each of Block 9/2b, Block 9/2c, Block 9/6a and Block 9/7b; and

• a corresponding beneficial interest under the licence interest documentation,

together the “Transferred Interest”.

In consideration of the transfer of the Kraken Interest, EnQuest Dons shall pay certain costs which would

otherwise be borne by First Oil as holder of its remaining 15 per cent. participating interest in Licences

P.1077 and P.1575 (the “Carried Interest”).

In addition, at Completion, First Oil has irrevocably agreed to approve the appointment of EnQuest Dons as

operator of Licence P.1077 and, following Completion, First Oil is obliged to support the appointment of

EnQuest Dons as operator of Licence P.1575.

3. Conditions and Termination Rights

The closing of the Proposed Acquisition is conditional on the satisfaction of certain conditions, including

approval by the Shareholders at the Extraordinary General Meeting, approval by the Secretary of State and

other third party consents. Approval is currently expected to be received from the Secretary of State on or

around 13 July 2012.

The Acquisition Agreement shall terminate if the conditions are not satisfied or waived by 31 December

2012.

If at any time prior to Completion there is a breach of the warranties (or it becomes apparent there will be a

breach of the warranties) given by First Oil to EnQuest Dons as to title to the Kraken Interest giving rise to

a loss of at least US$15 million, then EnQuest Dons may terminate the Acquisition Agreement.

4. Consideration

In consideration of the transfer of the Transferred Interest, with effect from 1 January 2012 EnQuest Dons

shall pay and discharge on behalf of First Oil costs up to a maximum amount of US$144 million attributable

to the Carried Interest incurred (i) under or in connection with a Secretary of State approved field

development plan in respect of the Kraken Field; and (ii) under an agreed budget under the joint operating

agreement for Licence P.1077. Although EnQuest Dons is liable to pay these costs with effect from 1 January

2012, since the costs to be incurred largely relate to a Secretary of State approved field development plan,

EnQuest Dons will not be committed to paying a significant part of the consideration until such a field

development plan has been submitted and approved by the Secretary of State.

10.4.1(2)(a)

10.4.1(2)(c)

18

The amount payable by EnQuest Dons as consideration is dependent on a future determination of the gross

2P reserves in the Kraken Field as determined by an independent assessor. If the determination of the 2P

reserves of the Kraken Field is:

• less than or equal to 100 MMboe, then EnQuest Dons will pay a maximum consideration of

US$90 million;

• less than 166 MMboe, but more than 100 MMboe, then the amount of consideration will be increased

from US$90 million by an amount of up to a further US$54 million, calculated on a linear pro-rata

basis; or

• equal to or greater than 166MMboe, then the amount of consideration will be the maximum of

US$144 million.

In the event that a field development plan for the Kraken Field does not provide for the burning of crude oil

as the primary source of supplementary fuel and instead requires a supplementary fuel gas import line then

the consideration shall be reduced. The maximum consideration for 2P reserves of:

• less than or equal to 100MMboe shall be US$78 million instead of US$90 million;

• less than 166 MMboe, but more than 100 MMboe, then the amount of consideration by which such

amount is increased on a pro rata linear basis in respect of assessed reserves between 100MMboe and

166 MMboe shall be up to a maximum of US$48 million instead of US$54 million; or

• equal to or greater than 166 MMboe, then the amount of consideration shall be up to a maximum of

US$126 million instead of US$144 million.

As mentioned above, the effect of the structure of the consideration payable by EnQuest Dons is such that

EnQuest Dons will not be committed to paying a significant part of the consideration until the Secretary of

State’s approval of the field development plan in respect of the Kraken Field has been obtained and a viable

development project has been formulated. Therefore, considerable flexibility is maintained for EnQuest

without having to commit significant amounts of funding.

5. First Oil’s Right of Re-Transfer

In the event that:

• EnQuest Dons is in material breach of its obligations to pay any amount of consideration due in

respect of the Carried Interests; or

• a field development plan has not been submitted to the Secretary of State for the DECC by

31 December 2013 (or such other date as the parties may agree acting reasonably), then First Oil may

require EnQuest Dons to re-assign and re-transfer the Transferred Interest to it.

6. Warranties and Indemnities

The parties mutually indemnify each other for liabilities in respect of the Transferred Interests before and

after 1 January 2012 with First Oil bearing the risk prior to such date and EnQuest Dons after such date.

Notwithstanding the mutual indemnities noted above, EnQuest Dons indemnifies First Oil against all

decommissioning and environmental liabilities in respect of the Transferred Interests except to the extent

they arise out of the wilful misconduct of First Oil.

First Oil provides customary warranties to EnQuest Dons including in respect of due incorporation,

authorisation, solvency, material litigation, insurance, title to the Transferred Interests, the Licences, the

Licence Interest Documents, defaults under the Licences or the Licence Interest Documents, sole risk notices

and operations, material health and safety issues, abandonment, decommissioning and plugging of wells.

EnQuest Dons provides customary warranties to First Oil in respect of its incorporation, authorisation,

material disputes and solvency.

19

7. Warranty Claims

The liability of First Oil with respect to its warranties is subject to a number of limitations including: (i)

EnQuest Dons must make a claim within 15 months of Completion; (ii) no claims may be made by EnQuest

Dons until aggregate losses suffered exceed US$100,000; and (iii) First Oil’s maximum liability under the

warranties shall be 100 per cent. of the costs paid by EnQuest Dons in respect of the Carried Interests.

8. EnQuest right of first offer in respect of the Carried Interest

If First Oil intends to sell the Carried Interest then it must notify EnQuest Dons. EnQuest Dons shall have

the right to make an offer, and if that offer is not accepted by First Oil then, First Oil may, for six months

thereafter, sell the Carried Interest to a third party, but not for consideration with a value less than the cash

equivalent value of that offered by EnQuest Dons.

9. Governing Law and Dispute Resolution

The Acquisition Agreement is governed by the laws of England and Wales. The courts of England are given

exclusive jurisdiction for the resolution of disputes.

10. Guarantee

At Completion, EnQuest shall be obliged to guarantee to First Oil the obligations and liabilities of EnQuest

Dons under the Acquisition Agreement.

20

PART IV

ADDITIONAL INFORMATION

1. RESPONSIBILITY STATEMENTS

1.1 The Directors (whose names appear on page  4 of this document) accept responsibility for the

information contained in this document. To the best of the knowledge and belief of the Directors (who

have taken all reasonable care to ensure that such is the case), the information contained in this

document is in accordance with the facts and contains no omissions likely to affect the import of such

information.

1.2 Gaffney, Cline & Associates whose registered address is at Bentley Hall, Blacknest, Alton, Hampshire

GU34 4PU, United Kingdom, accepts responsibility for the CPR set out in Part V of this document.

To the best of the knowledge and belief of Gaffney, Cline & Associates (which has taken all

reasonable care to ensure that such is the case) the information contained therein is in accordance with

the facts and contains no omissions likely to affect the import of such information.

2. THE COMPANY AND THE DIRECTORS

2.1 The Company was incorporated and registered in England and Wales on 29  January 2010 with

registered number 7140891 under the Companies Act as a public limited company with the name

EnQuest PLC. The principal legislation under which the Company operates and the Ordinary Shares

have been created is the Companies Act.

2.2 The registered office and the principal place of business in the United Kingdom of the Company is at

Rex House, 4-12 Regent Street, London SW1Y 4PE (telephone number (0)20 7925 4900 or, if dialling

from outside the United Kingdom, +44 (0)20 7925 4900).

3. DIRECTORS’ INTERESTS

3.1 As at 27 June 2012 (being the latest practicable date prior to the date of publication of this document),

the interests of each Director, their immediate families and related trusts and, insofar as is known to

them or could reasonable diligence be ascertained by them, persons connected (within the meaning of

section  252 of the Companies Act) with the Directors (all of which, unless otherwise stated, are

beneficial) in the Ordinary Shares, including interests arising pursuant to any transaction notified to

the Company in accordance with rule 3.1.2 of the Disclosure and Transparency Rules, are as follows:

As at 27 June 2012

% of existing Number of issuedDirectors Ordinary Shares share capital

Dr. James Buckee 868,107 0.11

Amjad Bseisu(1) 70,797,182 8.82

Jonathan Swinney 62,033 –

Nigel Hares 3,455,000 0.43

Helmut Langanger – –

Jock Lennox 20,000 –

Clare Spottiswoode – –

Notes:

(1) These Ordinary Shares are held by Double A Limited, a discretionary trust in which the extended family of Amjad Bseisu

has a beneficial interest.

3.2 The Company operates, inter alia, the EnQuest PLC Performance Share Plan 2010 (the “PSP”) and

the EnQuest PLC Restricted Share Plan (the “RSP” and together, the “Share Plans”). The Share

Plans were adopted and approved by Shareholders on 18 March 2010. The key terms of the Share

13.4.1(4)

13.4.1(6)

I.5.1.1

I.5.1.4

I.17.2

I.17.2

I.17.2

21

Plans were summarised in paragraphs 6.2 and 6.4 of Part XI (Additional Information) of the

Prospectus, which is incorporated by reference into this document.

3.3 In addition to the Share Plans, the Company operates the EnQuest PLC Sharesave Scheme

(“Sharesave Scheme”), which was adopted and approved by the Directors on 23 February 2012, with

the Shareholders’ approval of the satisfaction of the options granted under the Sharesave Scheme

being satisfied by way of issued shares in the capital of the Company being obtained at the Company’s

annual general meeting held on 30 May 2012. The key terms of the Sharesave Scheme were

summarised in the appendix entitled “Summary of the EnQuest PLC 2012 Sharesave Scheme” to the

Company’s notice of annual general meeting held on 30 May 2012, which is incorporated by

reference into this document.

3.4 The following options over Ordinary Shares have been granted to the Directors under the RSP and are

outstanding as at 27 June 2012 (being the latest practicable date prior to publication of this document):

Number of Ordinary Name of Director Shares under option Vesting Period Expiry Date

Amjad Bseisu 1,609,063 1 April 2012 - 1 April 2014 31 March 2020

591,324 19 April 2012 - 19 April 2014 18 April 2020

Nigel Hares(1) 268,177 1 April 2011 31 March 2020

804,532 1 April 2012 - 1 April 2014 31 March 2020

Jonathan Swinney 536,354 1 April 2012 - 1 April 2014 31 March 2020

163,387 19 April 2012 - 19 April 2014 18 April 2020

Notes:

(1) An amount of 268,177 nil cost award shares granted to Nigel Hares under the RSP vested in 2011 but were not exercised.

They were rolled over in line with the RSP plan rules.

3.5 The following awards to acquire Ordinary Shares under the PSP have been granted to the Directors:

Name of Director Granted First Vesting Date Expiry Date

Amjad Bseisu 583,090 19 April 2014 18 April 2021

391,790 19 April 2015 18 April 2022

Nigel Hares 443,148 19 April 2014 18 April 2021

317,164 19 April 2015 18 April 2022

Jonathan Swinney 324,975 19 April 2014 18 April 2021

254,663 19 April 2015 18 April 2022

The vesting of awards is subject to achievement of performance conditions.

3.6 On 11 May 2012, Jonathan Swinney was granted the option to acquire 9,000 Ordinary Shares under

the Sharesave Scheme.

3.7 On 1 April 2010, a one-off award of 1,416,880 Ordinary Shares was made to the Chairman, James

Buckee, on substantially the same terms as the RSP, which vests in such proportions as the

Remuneration Committee determines on the third, fourth and fifth anniversaries of the date of the

grant. Following the Remuneration Committee’s determination, the first vesting date was on 2 April

2012 whereby 176,737 Ordinary Shares vested.

3.8 Save as disclosed in paragraphs 3.1, 3.4, 3.5, 3.6 and 3.7 above, the Directors do not have any interests

in the share capital of the Company.

4. DIRECTORS’ SERVICE AGREEMENTS

4.1 Amjad Bseisu has a service agreement with EnQuest Britain (a subsidiary undertaking of the

Company). He is entitled to an annual salary of £395,000. Jonathan Swinney has a service agreement

with EnQuest Britain. He is entitled to an annual salary of £255,000. Nigel Hares has a service

agreement with EnQuest Britain. He is entitled to an annual salary of £290,000. James Buckee has a

letter of appointment with the Company. He is entitled to an annual fee of £200,000. The other non-

I.17.2

I.17.2

I.17.2

I.17.2

10.4.1(2)(g)

I.16.2

I.17.2

I.17.2

22

executive directors of the Company have each entered into letters of appointment with the Company

and are each entitled to an annual fee of £45,000, with the exception of the non-executive directors,

Helmut Langanger and Jock Lennox, who are entitled to an additional £8,000 each as payment for

chairing the remuneration committee and the audit committee respectively.

4.2 Further details of the service agreements of the executive directors and the terms of appointment of

the non-executive directors (with the exception of Alexandre Schneiter, who retired as a non-executive

director of the Company on 30 May 2012) are included in the Remuneration Report section of the

Company’s 2011 annual report and accounts.

5. MAJOR INTERESTS IN ENQUEST SHARES

5.1 So far as is known to the Company, as at 27 June 2012 (being the latest practicable date prior to the

date of publication of this document), the names of persons (other than a Director) who are, directly

or indirectly, interested in three per cent. or more of the voting rights in the Company and the capital

of the Company in issue, and the amount of such person’s interest, is as follows:

As at 27 June 2012

% of voting rights in respect of Number of existing issuedShareholder Ordinary Shares share capital

Baillie Gifford & Co 39,446,123 4.91

Swedbank Robur Asset Management 36,005,418 4.49

Ayman Asfari and family(1) 32,583,982 4.06

Investec Asset Management 27,025,081 3.37

Notes:

(1) Includes the interests of Lamia Trust and LAM Trust.

5.2 The Company is not aware of any person who exercises, or could exercise, directly or indirectly,

jointly or severally, control over the Company.

6. MATERIAL CONTRACTS

Save for the Acquisition Agreement, the principal terms of which are summarised in Part III of this

document, and as disclosed below, no contracts have been entered into (other than contracts entered into in

the ordinary course of business) by any member of the Group either: (i) within the period of two years

immediately preceding the date of this document, which are or may be material to the Group; or (ii) which

contain any provisions under which any member of the Group has any obligation or entitlement which is, or

may be, material to the Group as at the date of this document:

6.1 Acquisition by EnQuest of the entire issued share capital in Canamens Energy North Sea Limited(“CENSL”)

On 8 January 2012 Canamens Limited (the “Seller”) and EnQuest entered into an agreement relating

to the acquisition, subject to satisfaction of certain conditions precedent, of 100 per cent. of the issued

share capital of CENSL (the “CENSL Shares”) by EnQuest. EnQuest completed the acquisition of

the CENSL Shares on 31 January 2012 (“CENSL Closing”).

The consideration payable for the CENSL Shares comprised initial consideration and contingent

consideration. The initial consideration was payable on CENSL Closing and was US$35,000,000,

subject to certain adjustments, including, inter alia: (a) any amounts paid by the Seller under an

informal capital contribution agreement during the period of 31 October 2011 to CENSL Closing; (b)

any amounts owing to the Seller pursuant to an asset management agreement; and (c) interest

calculated pursuant to the agreement. The contingent consideration is US$45,000,000 and payable,

except as otherwise set out therein, within 30 days of the date of the Secretary of State’s authorisation

I.18.1

I.18.1

I.22

23

of a field development plan by for a development programme for the development of a discovery

relating to Licence P.1077.

Under the terms of the agreement, the Seller provided warranties to EnQuest relating to, among other

things, title to the CENSL Shares, capacity and authority to enter into the agreement, and general

business, operational and tax warranties. The Seller’s liability to EnQuest under the warranties is

limited to, in respect of any taxation warranties, 6 years from the date of CENSL Closing, and

15 months from the date of CENSL Closing in respect of any other claim.

EnQuest has agreed, in the event that the Secretary of State requires CENSL to submit, fund, or carry

out a decommissioning programme or otherwise pay monies in respect of residual liabilities relating

to the P.1077, P.1573, P.1574 and P.1575 Licences (the “Liabilities”), to procure that CENSL

complies and funds all such obligations and, in the event CENSL fails to do so, EnQuest shall

indemnify the Seller for all costs incurred by the Seller, its shareholders or affiliates against such

Liabilities.

6.2 Acquisition by EnQuest of the entire issued share capital in Canamens UK 814 and 815 Limited(“CUKL”)

On 8 January 2012 Canamens Limited (the “Seller”) and EnQuest entered into an agreement relating

to the acquisition, subject to completion of EnQuest’s acquisition of the CENSL Shares referred to

above, of 100  per cent. of the issued share capital of CUKL (the “CUKL Shares”) by EnQuest.

EnQuest completed the acquisition of the CUKL Shares on 31 January 2012 (“CUKL Closing”).

The consideration payable for the CUKL Shares was US$10,000,000, payable on CUKL Closing.

Under the terms of the agreement, the Seller provided certain warranties to EnQuest relating to,

among other things, title to the CUKL Shares, capacity and authority to enter into the agreement, and

general business, operational and tax warranties. The Seller’s liability to EnQuest under the warranties

is limited to, in respect of any taxation warranties, 6 years from the date of CUKL Closing, and

15 months from the date of CUKL Closing in respect of any other claim.

EnQuest has agreed, in the event that the Secretary of State requires CUKL to submit, fund, or carry

out a decommissioning programme or otherwise pay monies in respect of residual liabilities relating

to the P.1278 Licence (the “Liabilities”), to procure that CUKL complies and funds all such

obligations and, in the event CUKL fails to do so, EnQuest shall indemnify the Seller for all costs

incurred by the Seller, its shareholders or affiliates against such Liabilities.

6.3 Acquisition of an interest in the Crawford and Porter fields

On 9 May 2011 EnQuest Heather and Fairfield Acer Limited (“Fairfield”) entered into an agreement

(the “Crawford Porter Acquisition Agreement”) relating to the transfer of an interest in Licence

P.209, a 32 per cent. participating interest in Block 9/28a Area B and a corresponding interest under

relevant licence interest documents (the “Interests”) by Fairfield to EnQuest Heather. The Interests

were transferred in consideration for the payment by EnQuest Heather of the development and

appraisal costs incurred from 1 January 2011 in respect of a development programme for the Porter

Field and the Crawford Field which would otherwise have been payable by Fairfield in respect of its

remaining 20 per cent. interest in Block 9/28a Area B, up to a maximum of £34.85 million.

If a development programme in respect of the Porter field and the Crawford field has not been

submitted by to the Secretary of State by 30 June 2013, then Fairfield may within six months of such

date require EnQuest Heather to re-transfer the Interests to it for nominal consideration. If EnQuest

Heather defaults in its payment of the development and appraisal costs payable by it under the

Crawford Porter Acquisition Agreement, Fairfield may require EnQuest Heather to transfer to

Fairfield a proportion of the Interests equal to the proportion of £34.85 million represented by the

defaulted payment.

EnQuest Heather has indemnified Fairfield against decommissioning and environmental liabilities

arising in respect of the Interests with effect from 1 January 2011. Fairfield provided EnQuest Heather

24

with customary warranties. The warranties are subject to certain limitations including a cap on

Fairfield’s liability of £34.85 million and a time limit for bringing claims of 30 June 2012.

By a guarantee dated 30 June 2011, EnQuest Britain guaranteed to Fairfield the obligations and

liabilities of EnQuest Heather under the Crawford Porter Acquisition Agreement.

6.4 Arrangement Agreement with Stratic Energy Corporation (“Stratic”)

Stratic and EnQuest entered into an arrangement agreement on 2 August 2010 under which they

agreed to implement a business combination by way of a plan of arrangement (the “ArrangementAgreement”). The Arrangement Agreement contained representations and warranties from EnQuest

(none of which have survived the implementation of the plan of arrangement) and various conditions

precedent.

The acquisition of Stratic was completed on 5 November 2010, whereby the Group acquired 100 per

cent. of the issued share capital of Stratic for a consideration of US$54,163,000, satisfied by the issue

and allotment of 24,434,983 Ordinary Shares.

6.5 Acquisition of interests, inter alia in the Kraken Field, from Nautical Petroleum PLC and NauticalPetroleum AG

On 24 January 2012 EnQuest Dons, Nautical Petroleum PLC (“Nautical PLC”) and Nautical

Petroleum AG (“Nautical AG” and together with Nautical PLC, the “Sellers”) entered into an

agreement (the “Nautical Acquisition Agreement”) relating to the transfer of interests in Licence

P.1077, Licence P.1573, Licence P1574 and Licence P.1575, a 25 per cent. participating interest in

Block 9/2b, a 25 per cent. participating interest in Block 9/2c, a 10 per cent. participating interest in

each of Block 9/6a and Block 9/7b, a 15 per cent. participating interest in each of Block 3/22a and

Block 3/26 and a corresponding interest under the relevant licence interest documents (the

“Interests”) by the Sellers to EnQuest Dons. The Interests were transferred in consideration for the

payment by EnQuest Dons of the development costs (other than operator costs) incurred from

1 January 2012 in respect of a development programme for the Kraken Field which would otherwise

have been payable by the Sellers in respect of their aggregate remaining 25  per cent. interest in

Licence P.1077, up to a maximum of US$150 million, plus an amount dependent on a future

determination of the gross 2P reserves in the Kraken Field.

The amount payable by EnQuest Dons as additional consideration may increase dependent on a future

determination of the gross 2P reserves in the Kraken Field as determined by a competent person. If

the determination of the 2P reserves of the Kraken Field is:

(a) less than or equal to 100 MMboe, then EnQuest Dons will pay no further consideration to the

Sellers;

(b) equal to or greater than 166MMboe, then EnQuest Dons will pay a further US$90 million of

consideration to the Sellers; and

(c) greater than 100 MMboe but less than 166 MMboe, then EnQuest Dons will pay a further

amount of consideration to the Sellers equal to a proportion of US$90 million pro rated on a

linear basis to the amount by which the reserves are determined to be in excess of 100 MMboe

but less than 166 MMboe.

In the event that a field development plan approved by the Secretary for State for the Licence P.1077

does not provide for the burning of crude oil as the primary source of supplementary fuel and instead

requires a supplementary fuel gas import line then the maximum initial amount payable by EnQuest

Dons as consideration under the Nautical Acquisition Agreement shall be reduced from

US$150 million to US$130 million and the additional maximum consideration payable shall be

reduced from US$90 million to US$80 million (the actual amount payable otherwise being calculated

in the same manner as stated above).

25

Under the Nautical Acquisition Agreement, Nautical PLC also grants the right to EnQuest Dons to

acquire an interest in Licence P.1759 and a percentage interest in Block 9/1a (including the Ketos

discovery) equal to the Group’s interest in Block 9/2 at the time of the exercise of the option (up to a

maximum of 50 per cent.). The option must be exercised prior to the later of: (i) three calendar months

from the date Nautical PLC makes a new seismic survey of the relevant area available to EnQuest

Dons; and (ii) 30 June 2012.

If EnQuest Dons defaults in its payment of the development costs payable by it under the Nautical

Acquisition Agreement or, if a field development plan in respect of Licence P.1077 has not been

submitted by to the Secretary of State by 31 May 2013 (or such other date agreed by the parties acting

reasonably), then the Sellers may within 30 days of such event require EnQuest Dons to re-transfer to

them the Interests.

EnQuest Dons has indemnified the Sellers against decommissioning and environmental liabilities

arising in respect of the Interests with effect from 1 January 2012. The Sellers provided EnQuest Dons

with customary warranties. The warranties are subject to certain limitations including a cap on the

Sellers’ liability of the amounts payable by EnQuest Dons under the Nautical Acquisition Agreement

and a time limit for bringing claims of 16 June 2013.

By a guarantee dated 15 March 2012, EnQuest guaranteed to the Sellers the obligations and liabilities

of EnQuest Dons under the Nautical Acquisition Agreement.

6.6 The Facility Agreement

Overview

EnQuest and certain of its subsidiaries entered into an English law governed credit agreement on

6 March 2012 with, amongst others, Lloyds TSB Bank Plc, BNP Paribus, Barclays Corporate, The

Royal Bank of Scotland Plc, Banc of America Securities Limited and Credit Agricole Corporate and

Investment Bank (as mandated lead arrangers), NIBC Bank N.V. (as lead arranger) and Lloyds TSB

Bank Plc (as facility agent) (referred to hereafter as the “Facility Agreement”).

The Facility Agreement provides a multicurrency revolving credit facility, the aggregate commitments

of which start at US$525 million but may be increased, with the agreement of the lenders, to US$900

million (the “Aggregate Commitments”). The Facility Agreement allows for nine of the Enlarged

Group’s companies (EnQuest and certain subsidiaries) to borrow funds (“Borrowers”). The

obligations on the Enlarged Group under the Facility Agreement are guaranteed by the Borrowers and

three additional group companies (collectively, the “Guarantors”).

The Borrowers’ obligations under the Facility Agreement are secured by way of (i) charges over the

shares of all the Borrowers (except for EnQuest) and EnQuest Britain Ltd, which is a Guarantor only,

and (ii) floating charges over the assets of all the Borrowers.

Purpose

The Facility Agreement provides funding to the Enlarged Group for general corporate purposes.

The facilities may also be used by the Borrowers to obtain letters of credit (“LOCs”) in connection

with the operation, development and decommissioning of petroleum assets, and infrastructure related

to such assets.

Utilisations and interest

The amount of funds that the Borrowers may draw under the Facility Agreement is limited to the

lower of (i) the Aggregate Commitments, and (ii) the maximum amount that may be drawn without

the Borrowers breaching the financial covenants less US$5,000,000. The amount drawn under the

LOCs is limited to the greater of (a) US$300 million and (b) 50  per cent. of the Aggregate

Commitments. A utilisation request made in US dollars must be in a minimum amount of

US$5 million; a request in sterling, £3 million; and a request in euros, €3 million.

26

Loans made under the Facility Agreement bear interest at the aggregate of (a) an agreed margin

ratchet that varies depending on the group’s leverage ratio; (b) LIBOR or, in the case of any euro loan,

EURIBOR; and (c) additional mandatory costs of the lenders (if any). Interest on overdue amounts is

charged at a rate of 2 per cent. above the rate at which loans are drawn down or LOCs are issued under

the Facility Agreement.

Cancellation and repayment

EnQuest is able to cancel the unutilised amount of the total commitments in whole or in part. Partial

cancellation of Facility Agreement commitments must be in a minimum amount of US$1 million and

an integral multiple of US$1 million. In addition, the Facility Agreement will allow voluntary

prepayment of a loan, on the giving of five business days’ notice, provided that each voluntary

prepayment is a minimum of US$1 million (or the equivalent in other currencies where the loan is in

another currency).

Each lender may request mandatory prepayment of its outstanding loans/LOCs if a change of control

occurs. A ‘change of control’ is defined in the Facility Agreement as occurring if any person or group

of persons acting in concert gains control of EnQuest.

Maturity

Each Borrower which has drawn a loan shall repay that loan in full on the last day of the interest

period chosen by such Borrower for that loan. As is typical with a revolving facility, the amounts that

are repaid may then be re-borrowed. Each LOC issued shall expire one month before the final

maturity date of the facilities unless such LOC is deemed to be an extended LOC where, subject to

certain conditions, it shall expire 5 years after the final maturity date of the facility. The final maturity

date for the facility is three years from the date that the Facility Agreement is entered into, subject to

a provision which allows EnQuest, provided certain conditions are met, to extend the Facility

Agreement for a further year (i.e. four years from the date of the Facility Agreement) and a further

provision that subsequently allows EnQuest, with lender consent and provided certain conditions are

met, to again extend the Facility Agreement for a further year (i.e. five years from the date of the

Facility Agreement).

Controls on the Enlarged Group’s activities

The Facility Agreement contains customary representations and warranties and affirmative and

negative covenants. In particular, unless the lenders agree in writing, neither EnQuest nor any other

Borrower or Guarantor under the Facility Agreement may enter into a merger or reconstruction.

Coupled with this, neither EnQuest nor any of its subsidiaries may enter into any transaction that is a

Class 1 transaction unless it is agreed to by the lenders and certain conditions are met. The Facility

Agreement also contains a negative pledge, restrictions on financial indebtedness and disposals and

requires, at the Enlarged Group level, the maintenance of specified leverage, reserve based value and

interest cover ratios.

The Facility Agreement contains certain customary events of default for this type of facility,

including:

(a) any event or series of events which has, or is reasonably likely to have, a material adverse effect

on the business or financial condition of any Borrower or Guarantor.

(b) a cross-default provision applicable if a debt, or an aggregate of debts, valued at US$1 million

or more is not paid when due (after the expiry of any grace period);

(c) if all or any part of any petroleum asset or petroleum or revenues derived from any petroleum

asset is nationalised, expropriated, compulsory acquired or seized by any government entity or

any such government entity announces that it shall take such action and that action it is likely

to have a material adverse effect on the business or financial condition of any Borrower or

Guarantor; or

27

(d) the initiation of certain insolvency proceedings by any Borrower or Guarantor.

6.7 Disposal of interests in the Alma Field and the Galia Field to KUFPEC UK Limited

On 29 May 2012, EnQuest Heather and KUFPEC UK Limited (“KUFPEC”) entered into an

agreement (the “KUFPEC Disposal Agreement”) relating to the disposal of interests, by EnQuest

Heather to KUFPEC, in Licence P. 1765 and Licence P. 1825, a 35  per cent. interest in each of

Block 30/24b, Block 30/24c and Block 30/25c, a 35 per cent. interest in asset data (in the possession

of under the control of EnQuest Heather), assets and property derived from Licence P. 1765 and

Licence P. 1825, and a corresponding interest under the relevant licence interest documents (together

the “A&G Interests”). The A&G Interests are to be transferred, following the satisfaction of certain

conditions (described below), in consideration for the payment by KUFPEC:

(a) of the costs that have been and will be incurred by EnQuest Heather in relation to the A&G

Interests during the period between 1 January 2012 and the date the A&G Interests are

transferred to KUFPEC (the “Transfer Date”);

(b) of up to 90 per cent. of the costs arising, from and including the Transfer Date, in respect of

the A&G Interests in accordance with the terms of the agreed form joint operating agreement

to be entered into on the Transfer Date by EnQuest Heather and KUFPEC (the “A&G JOA”);

and

(c) of the development costs (excluding such costs for equipment items) incurred, from and

including the Transfer Date, for the both the A&G Interests and EnQuest Heather’s 65 per cent.

carried interest in the Alma Field and the Galia Field up to a maximum sum of US$182 million

(the “Cap”).

Following the exhaustion of the Cap, the development costs for the A&G Interests shall be satisfied

by EnQuest Heather and KUFPEC in accordance with their respective participating interests in the

Alma Field and the Galia Field in accordance with the A&G JOA.

As security for the payment by KUFPEC of such development costs referred to in (c) above, KUFPEC

has agreed to procure, on the Transfer Date, a letter of guarantee under which KUFPEC’s payment

obligations under the KUFPEC Disposal Agreement are guaranteed by Deutsche Bank in favour of

EnQuest Heather up to the value of the Cap.

The transfer of the A&G Interests is conditional upon the satisfaction of certain conditions, including

the Secretary of State’s approval of the transfer of the A&G Interests, the execution by EnQuest

Heather and KUFPEC of assignment documentation, and the agreement by EnQuest Heather and

KUFPEC of the forms of a construction and tie-in agreement and an operation maintenance and

services agreement. In the event that these conditions are not satisfied or waived by 31 December

2012 (or such other date agreed by EnQuest Heather and KUFPEC), the KUFPEC Disposal

Agreement shall terminate upon notice.

If on 1 January 2017, the development costs KUFPEC has incurred and paid, in respect to the A&G

Interests (including the carried costs paid in accordance with (c) above) (the “KUFPEC Costs”),

exceeds the higher of: (i) the actual revenue (net of operating expenditure) KUFPEC has received

from the sale of petroleum relating to the A&G JOA; or (ii) the deemed revenue (net of operating

expenditure) in accordance with a US dollar multiplier, specified in the KUFPEC Disposal

Agreement, based on the A&G Interests’ share of the number of barrels of petroleum produced by the

Alma Field and the Galia Field, then KUFPEC shall be entitled, from 1 January 2017, to receive from

EnQuest Heather an additional 20  per cent. share of the revenue (net of operating expenditure)

received from the sale of petroleum relating to the A&G JOA (the “Additional Revenue”). EnQuest

Heather shall continue to attribute this Additional Revenue to KUFPEC until the earlier of: (i) the date

the actual revenue (net of operating expenditure) KUFPEC has received from the sale of petroleum

relating to the A&G JOA equals or exceeds the KUFPEC Costs; or (ii) the date the deemed revenue

(calculated in accordance with the formula described above) equals or exceeds the KUFPEC Costs.

28

EnQuest Heather has agreed, with effect from the Transfer Date, to indemnify KUFPEC in respect of

any liabilities in respect to the A&G Interests that accrued in or relate to the period prior to 1 January

2012. Furthermore, EnQuest has agreed, with effect from the Transfer Date, to guarantee the

obligations and liabilities of EnQuest Heather under the KUFPEC Disposal Agreement.

Completion of the transfer of the A&G Interests is currently expected to complete in July 2012.

6.8 Heather Field Arrangements

The Enlarged Group’s decommissioning liabilities in respect of the Heather field are not based on its

equity interest in this field. Instead, the Enlarged Group’s decommissioning liabilities are based on a

contractual obligation of 37.5 per cent. of such decommissioning liability, for which there is: (i) a

letter of credit in place expiring on 6 February 2014 (or as extended), for the sum of US$5 million,

issued by BNP Paribas on behalf of EnQuest Heather and in favour of Unocal International

Corporation (“Unocal”); and (ii) a letter of credit in place expiring on 31 December 2012 (or as

extended), for the sum of £75 million issued by BNP Paribas on behalf of EnQuest Heather and in

favour of BG Great Britain Limited (“BGGL”) (the “Letters of Credit”). Pursuant to the terms of the

Letters of Credit, BNP Paribas, as the issuing bank, is required to pay the respective values of the

Letters of Credit on demand from Unocal or BGGL.

6.9 Thistle and Deveron Field Arrangements

Your attention is drawn to details of the “Thistle and Deveron Field Arrangement” set out in paragraph

16.6 of Part XI (Additional Information) of the Prospectus with the subheadings “Intervening PeriodAgreement” and “Retransfer Sale and Purchase Agreement” only, such sections being incorporated

by reference into this document.

7. LITIGATION

7.1 There are no, and there have not been, any governmental, legal or arbitration proceedings (including

any such proceedings which are pending or threatened of which the Company is aware) during the

12  months prior to the date of this document which may have, or have had in the recent past, a

significant effect on the Company’s and/or the Group’s financial position or profitability of the Group.

7.2 There are no, and there have not been, any governmental, legal or arbitration proceedings (including

any such proceedings which are pending or threatened of which the Company is aware) during the 12

months prior to the date of this document which may have, or have had in the recent past, a significant

effect on the financial position or profitability of the Kraken Interest.

8. WORKING CAPITAL

The Company is of the opinion that, taking into account the cash and other facilities available to the Enlarged

Group, the Enlarged Group has sufficient working capital for its present requirements, that is, for at least the

next twelve months from the date of publication of this document.

9. SIGNIFICANT CHANGE

9.1 Save for entering into the Facility Agreement disclosed in paragraph  6.6 of this Part IV of this

document, the Canamens Acquisition disclosed in paragraphs 6.1 and 6.2 of this Part IV of this

document, the Nautical Farm-In Agreement disclosed in paragraph 6.5 of this Part IV of this

document, the Alma/Galia Farm-Out disclosed in paragraph 6.7 of this Part IV of this document, there

has been no significant change in the financial or trading position of the Company since 31 December

2011, being the date on which the audited annual report and accounts 2011 were prepared.

9.2 As a result of the Alma/Galia Farm-Out, while it enhances the economics of the project by farming

out 35 per cent. of the gross production, EnQuest will therefore reduce its anticipated net production

by approximately 7,000 Boepd in 2014 (previous estimate in excess of 40,000 Boepd) and by

I.20.8

III.3.1

I.20.9

29

approximately 1,750 Boepd in 2013 (previous estimate 25,000 to 30,000 Boepd). EnQuest’s overall

company net production outlook will similarly be reduced.

10. FINANCIAL INFORMATION

Due to the nature of the carry arrangement, there is no initial consideration and therefore the Directors

believe that, as at the date of Completion, the Proposed Acquisition has no material effect on the Group’s

earnings, assets and liabilities.

11. RELATED PARTY TRANSACTIONS

Save as set out in note 26 to the Notes to the Group Financial Statements section of the Company’s annual

reports and accounts 2011, and note 23 to the Notes to the Group Financial Statements section of the

Company’s annual reports and accounts 2010, there have been no related party transactions during the

financial years ended 31 December 2010 and 2011.

12. CONSENTS

12.1 Gaffney, Cline & Associates Limited has given and not withdrawn its written consent to the inclusion

of the CPR in Part V of this document and/or extracts therefrom and the references thereto and to its

name in the form and context in which they appear, in this document.

12.2 Merrill Lynch International, has given and not withdrawn its consent to the inclusion in this document

of the references to its name in the form and context in which they appear in this document.

13. INFORMATION INCORPORATED BY REFERENCE

Information from the following documents (or parts of documents) has been incorporated in this document

by reference:

(a) paragraphs 6.2 and 6.4 of Part XI (Additional Information) of the Prospectus;

(b) paragraph 16.6 of Part XI (Additional Information) of the Prospectus with the subheadings

“Intervening Period Agreement” and “Retransfer Sale and Purchase Agreement” only;

(c) the sections entitled “Remuneration Report” and “Notes to the Group Financial Statements”

contained in the Company’s 2011 annual report and accounts; and

(d) the section entitled “Notes to the Group Financial Statements” contained in the Company’s 2010

annual report and accounts.

14. DOCUMENTS AVAILABLE FOR INSPECTION

Copies of the following documents will be available for inspection during normal business hours on any

weekday (Saturday, Sundays and public holidays excepted) at Rex House, 4-12 Regent Street, London,

SW1Y 4PE, United Kingdom (the Company’s registered office) and the offices of CMS Cameron McKenna

LLP, Mitre House, 160 Aldersgate Street, London, EC1A 4DD, United Kingdom from the date of this

document up to and including 16 July 2012:

(a) the articles of association of the Company;

(b) the Acquisition Agreement;

(c) the Competent Person’s Report set out in Part V of this document;

(d) the letters of consent referred to in paragraph 12 above; and

(e) this document and the Form of Proxy.

I.19

13.4.1(6)

13.3.1(10)

I.24

13.4.1(5)

30

PART V

31

EnQuest Plc Copy No. EL-12-208200

COMPETENT PERSON’S REPORT ON THE KRAKEN FIELD, UK NORTH SEA

Prepared for

ENQUEST Plc

JUNE, 2012

.

www.gaffney-cline.com

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Page No.

INTRODUCTION ..................................................................................................... 1 EXECUTIVE SUMMARY ......................................................................................... 4 DISCUSSION ......................................................................................................... 5 1. BACKGROUND ........................................................................................... 5 2. GEOLOGICAL SETTING ............................................................................. 7 3. FIELD GEOLOGY ........................................................................................ 9 4. GEOPHYSICS AND SEISMIC MAPPING ................................................... 11 5. STATIC MODEL ........................................................................................... 13 6. PETROPHYSICS ......................................................................................... 15 7. RESERVOIR ENGINEERING ...................................................................... 15 8. DYNAMIC MODEL ....................................................................................... 17 9. DRAFT FIELD DEVELOPMENT PLAN ....................................................... 19 10. CONTRACT AND FISCAL TERMS ............................................................. 21 11. CONTINGENT RESOURCE ESTIMATES ................................................... 21 12. QUALIFICATIONS ....................................................................................... 22 13. BASIS OF OPINION .................................................................................... 23 Tables 0.1 Summary of Kraken Field Ownership .......................................................... 4 0.2 Licence Summary as at 31st March, 2012 .................................................... 4 0.3 Summary of Gross and Net Unrisked Oil Contingent Resources as at 31st March, 2012 .......................................................................................... 5 0.4 Summary of Gross and Net Unrisked Oil Contingent Resources after First Oil Acquisition ...................................................................................... 5 8.1 Summary of Kraken Field HCM Recoverable Volumes ............................... 18 8.2 Summary of Kraken Field FFM Recoverable Volumes ................................ 19 11.1 Summary of Gross and Net Unrisked Oil Contingent Resources as at 31st March, 2012 .......................................................................................... 22 11.2 Summary of Gross and Net Unrisked Oil Contingent Resources after First Oil Acquisition ...................................................................................... 22

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Page No. Figures 0.1 Kraken Field Location Map .......................................................................... 2 1.1 9/02-1 Reservoir Summary .......................................................................... 6 2.1 East Shetland Platform Paleocene Stratigraphy .......................................... 7 2.2 East Shetland Platform and Slope: Heimdal Sedimentology ....................... 8 2.3 Regional Sedimentology Model Integrated with Basin Reconstruction & Amplitudes ................................................................................................ 9 3.1 Heimdal Unit III Geomodel: Top Heimdal Unit III Depth Shading and Faults ........................................................................................................... 10 4.1 N-S Seismic Line (Inline 3260) Illustrating Core Area and Extended Pick ... 12 5.1 Kraken Geomodel: Top Heimdal Unit III Main Depth ................................... 13 5.2 Net:Gross “Holes” Case ............................................................................... 14 7.1 9/02b-4 DST Flow Periods ........................................................................... 16 8.1 Kraken Development Area Porosity Map from Simulation Model ................ 17 8.2 Full Field Model Best Estimate Case ........................................................... 18 9.1 Phase 1 and Phase 2 Development Areas .................................................. 20 Appendices I. Abbreviated Form of SPE-PRMS II. Glossary

34

Gaffney, Cline & Associates Limited Bentley Hall, Blacknest Alton, Hampshire GU34 4PU, UK Telephone: +44 (0)1420 525366 www.gaffney-cline.com

Registered in England, number 1122740, at the above address

TG/EL-12-208200/sf 28th June, 2012 The Directors, EnQuest Plc, 4th Floor,Rex House, 4-12 Regent Street, London, SW1Y 4PE Paul Frankfurt Esq, Merrill Lynch International, 2 King Edward Street, London, EC1A 1HQ Dear Sirs,

COMPETENT PERSON’S REPORT ON THE KRAKEN FIELD, UK NORTH SEA

INTRODUCTION In accordance with the instruction from EnQuest Plc (EnQuest or “the Company”), dated 10th May, 2012, Gaffney, Cline & Associates (GCA) has reviewed the petroleum interests owned or intended to be owned by EnQuest in the Kraken field located in the UK Northern North Sea Block 9/02b (Figure 0.1), in order to provide an independent opinion on Resources for the main Heimdal Unit III/II reservoir in the field. The Effective Date of the evaluation is 31st March, 2012. In January, 2012 EnQuest acquired the 20% participating interest of Canamens Energy North Sea Ltd (Canamens) and a 25% interest from Nautical Petroleum Plc (Nautical) in Licence P1077 (Blocks 9/02b & 9/02c). On 25th April, 2012, EnQuest entered into an agreement with First Oil to acquire a further 15% interest in Block 9/02b, Block 9/02c, Block 9/06a and Block 9/07b. Following this acquisition, EnQuest will take over as Operator of the Kraken discovery during the third quarter of 2012. Both the acquisition and the transfer of Operatorship will be subject to approval by the Department of Energy and Climate Change (DECC). This report has been prepared for EnQuest as part of its obligations regarding the publication of a Circular issued to its shareholders requesting their consent to the Proposed Acquisition of the Kraken Interest.

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FIGURE 0.1

KRAKEN FIELD LOCATION MAP

KRAKEN

BENTLEY

BRESSAY

9/2-1

9/2b-5

9/2b-4

9/2b-2

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EnQuest has made available to GCA, via the current Kraken field Operator, Nautical, a data set of technical information including geological, geophysical, and engineering data and reports together with financial data pertaining to the fiscal terms applicable to the Kraken field’s Block 9/02b. In carrying out this review GCA has relied on the accuracy and completeness of this information in addition to the caveats imposed on the pre-existing, outline Field Development Plan (FDP) by the incoming Operator, EnQuest.

The Resources reported herein are in accordance with the guidelines and definitions of the Society of Petroleum Engineers/World Petroleum Council/American Association of Petroleum Geologists/Society of Petroleum Evaluation Engineers (SPE/WPC/AAPG/SPEE) Petroleum Resources Management System (“SPE PRMS”), approved in March 2007 (see Appendix I for an abbreviated version).

Reserves are those quantities of petroleum that are anticipated to be commercially recoverable by application of development projects to known accumulations from a given date forward under defined conditions. Reserves must further satisfy four criteria: they must be discovered, recoverable, commercial and remaining (as of the evaluation date) based on the development project(s) applied. Reserves are further categorized in accordance with the level of certainty associated with the estimates and may be sub-classified based on project maturity and/or characterized by development and production status.

Contingent Resources are those quantities of petroleum estimated, as of a given date, to be potentially recoverable from known accumulations, but the applied project(s) are not yet considered mature enough for commercial development due to one or more contingencies. Contingent Resources may include, for example, projects for which there are currently no evident viable markets, or where commercial recovery is dependent on technology under development, or where evaluation of the accumulation is insufficient to clearly assess commerciality. Contingent Resources are categorized as 1C, 2C and 3C in accordance with the level of certainty associated with the estimates and may be sub-classified based on project maturity and/or characterized by their economic status. Contingent Resource volumes are presented as unrisked. The stated 'Chance of Development', a percentage which pertains to the probability of achieving the status of a Reserve has not been applied to the volumes presented.

The reported hydrocarbon volumes are estimates, based on professional judgment and are subject to future revisions, upward or downward, as a result of future operations or as additional information becomes available.

GCA accepts responsibility for the CPR insofar as it is based on data provided by EnQuest, which GCA has relied on the accuracy and completeness thereof, and confirms that, to the best of its knowledge and belief having taken all reasonable care to ensure that such is the case, the information contained in the CPR is in accordance with the facts and contains no omission likely to affect its import.

GCA is an independent energy consultancy specialising in petroleum evaluation and economic analysis. In the preparation of this report, GCA has maintained, and continues to maintain, a strict consultant-client relationship with EnQuest. The directors of GCA have been, and continue to be, independent of EnQuest in the services they provide to the Company including the provision of the opinion expressed in this review. Furthermore, the directors of GCA have no interest in any assets or share capital of EnQuest or in the promotion of the Company.

Appendix II is a glossary of oilfield terms, some or all of which may be used in this report.

This report must only be used for the purpose for which it was intended.

TG/EL-12-208200/sf EnQuest Plc

4

EXECUTIVE SUMMARY The Kraken field is a heavy oil discovery located in Block 9/02b on the western margin of the South Viking Graben in the UK Northern North Sea, in water depths of 114 m. The nearest producing field and export infrastructure is Bruce, located about 10 km to the south-east. The licence ownership of the Kraken discovery as at 31st March, 2012 and after the First Oil acquisition is completed, are summarised in Table 0.1. The Company’s Licence interests as at 31st March, 2012 are summarised in Table 0.2.

TABLE 0.1

SUMMARY OF KRAKEN FIELD OWNERSHIP

Company Working Interest as at

31st March, 2012 (%)

Interest Being Acquired

(%)

Working Interest after Acquisition

(%) EnQuest 45 15 60 Nautical 25 - 25 First Oil 30 - 15

TABLE 0.2

LICENCE SUMMARY AS AT 31ST MARCH, 2012

Country Licence/Block Operator Company WI

(%) Expiration Date

United Kingdom P1077 9/02b, 9/02c Nautical 45 2029 (anticipated) GCA has previously evaluated the field on behalf of Nautical, the current Operator, with an effective date of 28th February, 2012. Based on data and representations made by Nautical, and the joint venture’s commitment to submitting a draft FDP to the DECC during 2012, GCA attributed Reserves to the field. With the intended transfer of operatorship to EnQuest it has determined to review the FDP and consider other options for development, GCA has now re-classified the potentially recoverable hydrocarbon volumes as Contingent Resources. This reclassification does not result from any new data or change in the perception of recoverable volumes, it is based on the fact that EnQuest’s Board of Directors has yet to approve its commitment to the development. EnQuest as the incoming Kraken field Operator has elected to interpret the 3D seismic data acquired during 2011 and after integrating these data into the dynamic model, confirm the development concept and obtain project sanction from the EnQuest Board. GCA understands that EnQuest anticipates the submission of a revised FDP to DECC comprising a Phase 1 Development of the High Confidence Area followed by a Phase 2 Development provided the presence of oil filled sands is confirmed by the drilling of two appraisal wells.

GCA’s estimates of 1C, 2C and 3C Gross and Net EnQuest Working Interest Contingent Resources are summarised in Table 0.3 as at 31st March, 2012 and in Table 0.4 after the First Oil acquisition.

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TABLE 0.3

SUMMARY OF GROSS AND NET UNRISKED OIL CONTINGENT RESOURCES AS AT 31ST MARCH, 2012

Gross Contingent Resources

(MMBbl) EnQuest Net Working

Interest (%)

EnQuest Net Contingent Resources as at 31st March, 2012

(MMBbl) 1C 2C 3C 1C 2C 3C 100 172 273 45.0 45 77 123

Notes: 1. The meaningful Contingent Resource volume reported here is the 2C, or ‘Best Estimate’ value. 2. No economic limit cut off is applied for Contingent Resources. 3. The volumes reported here are “Unrisked” in the sense that “Chance of Development” values have not

been arithmetically applied to the designated volumes within this assessment. “Chance of Development” represents an indicative estimate of the probability that the Contingent Resource will be developed, which would warrant the reclassification of that volume as a Reserve

TABLE 0.4

SUMMARY OF GROSS AND NET UNRISKED OIL CONTINGENT RESOURCES AFTER FIRST OIL ACQUISITION

Gross Contingent Resources

(MMBbl) EnQuest Net Working

Interest (%)

EnQuest Net Contingent Resources after Acquisition

(MMBbl) 1C 2C 3C 1C 2C 3C 100 172 273 60.0 60 103 164

Notes: 1. The meaningful Contingent Resource volume reported here is the 2C, or ‘Best Estimate’ value. 2. No economic limit cut off is applied for Contingent Resources. 3. The volumes reported here are “Unrisked” in the sense that “Chance of Development” values have not

been arithmetically applied to the designated volumes within this assessment. “Chance of Development” represents an indicative estimate of the probability that the Contingent Resource will be developed, which would warrant the reclassification of that volume as a Reserve

GCA has considered its opinion on the Chance of Development that the Kraken project will progress and warrant re-classification as Reserves. At this time GCA considers that the factors requiring confirmation prior to such re-classification relate to the interpretation and incorporation of the 3D seismic and confirmation of the development concept through FEED and ultimately project sanction. EnQuest’s assessment of the Chance of Development is 90% for Phase 1 and 75% for Phase 2, contingent on the two proposed appraisal wells confirming the presence of oil filled sands. Based on GCA’s review and discussion with EnQuest, GCA concurs with the EnQuest assessment as fair and reasonable. DISCUSSION 1. BACKGROUND The Kraken field was discovered in 1985 by the Occidental Petroleum well 9/02-1a. This well was located on the western margin of the South Viking Graben in the UK Northern North Sea, and was drilled to test an Upper Jurassic fault-block prospect with secondary objectives in overlying Upper Palaeocene sands. The Upper Jurassic was absent, but heavy oil (14° API) with an apparent viscosity of 374 cP was tested at an initial rate of 220 bopd from a 16 m interval from 1,179 m to 1,195 m BRT known as the Main Sand Unit of the Heimdal Unit III Member of the late Palaeocene, Lista Formation (Figure 1.1). The tested oil rate

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declined to 43 bopd; well 9/02-1a was plugged and abandoned and the block relinquished, later to be awarded to Nautical as a Promote licence (Block 9/02b) in 2003.

FIGURE 1.1

9/02-1 RESERVOIR SUMMARY

GR0 150 (GAPI)

CALS6 16 (in)

SP0 100 (mV )

Dep

th (f

t)

3850

3900

3950

ILM0.2 2000 (ohmm)

ILD0.2 2000 (ohmm)

MLL0.2 2000 (ohmm)

RD0.2 2000 (ohmm)

ZDEN1.7 2.7 (g/cc)

CNC60 0 (%)

AC190 40 (us /f)

ACedit190 40 (us /f)

PHIS0.5 0 (frac)

Sw Free1 0 (frac)

PHIDWe0.5 0

SW*POR1 0

PHIDWe1 0

VSHGR0 1

Interbedded Unit L. Bressay Sst

Main Unit L. Bressay Sst

Base L. Bressay Sst

Inter-bedded Unit Main Unit Complete Unit

Top Interval (m/ft MD) 1162 3814 1180 3871 1162 3814

Base Interval (m/ft MD) 1180 3871 1195 3921 1195 3921

Gross Thickness (m) 17.5 15.5 33

Net Pay Thickness (m) 8 15 23

Pay Arith Avg Sw (%) 30.8 23.1 25.7

Pay Arith Avg Phi (PHIDWe) (%) 23.7 30.4 28.1

InterbeddedUnit

Main Unit

Main sand

N:G ~98%

Porosity ~30.4%

Oil sat ~77%

After conversion to a conventional licence and following the purchase and reprocessing of 3D seismic data plus specialist studies in rock physics and structural modelling, appraisal well 9/02b-2 was drilled in 2007 and found the oil-bearing Heimdal Unit III (10 m gross) and the underlying Unit I (22 m gross) reservoirs. The ODT in the Heimdal Unit III of the 9/02b-2 well was found to be 51 m deeper than that of the discovery well. The Heimdal Unit I sands comprised three distinct bodies each 3-4 m thick separated by background shales. Seismic inversion studies were undertaken prior to drilling the down-dip appraisal well 9/02b-3 in 2008, ca. 3 km to the NE of 9/02b-2; however, this well failed to locate the oil water contact (OWC) as prognosticated and found the Heimdal Unit III and Unit I sands to be absent. In 2009 the rock physics model was revised and a two dimensional (2D) Controlled Source Electro-Magnetic (CSEM) survey was acquired mainly in the Central “Core Area”, along with further three dimensional seismic (3D) studies including coloured inversion. Sedimentological and back-stripping studies were carried out prior to drilling the 9/02b-4 & -4z appraisal well. This 2010 appraisal well with its sidetrack proved the extension of the Heimdal Unit III fairway ca 4-5 km to the SW with a deeper ODT at -1,198 m TVDss and the presence of oil-bearing sands in underlying Heimdal Unit II or Unit IIIb, but no Unit I sands. The Main Sand gross and net thicknesses were 26 m in 9/02b-4 and 13 m in 9/02b-4z Unit III. This westward halving in thickness occurs over a distance of approximately 350 m and may in part be due to a NE-SW trending fault interpreted between the vertical well and its sidetrack.

The most recent and last planned appraisal well designated 9/02b-5 and its horizontal sidetrack -5z were drilled and tested in Q3/Q4 2011 at a stabilised rate of 4,000 bopd with well test analysis indicating effective horizontal permeability of 3,500 to 5,000 mD in the high confidence Central Core Area of the field between wells 9/02b-4 and 9/02-1. The pilot,

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deviated well 9/02b-5 found the Heimdal Unit III/II reservoir sands as predicted, albeit subdivided into three distinct geo-bodies separated by shales. The uppermost geo-body is informally known as Leaf 1, separated by 7.6 m of shale from the lower two geo-bodies, which are divided by a thinner shale interbeds and labelled Leaf 2. Leaf 1 is 10.4m thick, 100% net to gross with an average porosity of 38% and average water saturation of 20% and an ODT of -1,173 m TVDss. Leaf 2 is 23.3 m gross, 18.7 m net (net to gross 78%), with an average porosity of 38% and average water saturation of 23% and an ODT of -1,201 m TVDss. The uppermost Leaf 2 section was cored and the sands described as very fine to medium grained, rarely coarse grained, subangular to subrounded, moderately sorted, loose, friable and unconsolidated. In summary, the Kraken Main Sand Unit reservoir of Heimdal Unit III/II penetrated fully by the four wells and one side-track to date, ranges in gross thickness from 10.2 m to 33.7 m, where present, averaging ca.20 m with a Net to Gross ratio of 78-100% (92% average). Average porosities range between 28% and 38% and this combined with multi-Darcy permeability (3.5 D average) results in exceptional sand quality, but leads to sand production and plugging of completions; thus gravel packs are planned to be used routinely in production wells. 2. GEOLOGICAL SETTING The late Palaeocene Lista Formation comprises predominantly slope mudstones, which pass laterally into turbiditic sands of the Heimdal Member (Figure 2.1). The Heimdal Member is subdivided from bottom to top into up to four units, namely I, II, III and IV. Heimdal Unit III/II is also referred to as the Main Unit within the Kraken field as it forms the principal reservoir interval. In the Kraken area these reworked shelf sands are thought to have been sourced from the East Shetland Platform to the west, shed eastwards and trapped on the East Shetland Slope (Figure 2.2) due to a subtle bathymetric low caused by inversion on an extensional fault, antithetic to the main Viking Graben boundary fault system, which then funnelled the submarine channel system southwards (Figure 2.3).

FIGURE 2.1

EAST SHETLAND PLATFORM PALEOCENE STRATIGRAPHY

Top Balder/T50

Top Dornoch/T45

Top Lista/T34

Top T33

Top T32

Top T31

Base Tertiary

Top Maureen/T20

Intra Dornoch

Reservoir objectives

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FIGURE 2.2

EAST SHETLAND PLATFORM AND SLOPE: HEIMDAL SEDIMENTOLOGY

From: Ahmadi et al. 2003, Paleocene, Millennium Atlas

Heimdal Sedimentology

Extent of sequence mapping

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FIGURE 2.3

REGIONAL SEDIMENTOLOGICAL MODEL INTEGRATED WITH BASIN RECONSTRUCTION & AMPLITUDES

In the well penetrations to date, the basal Heimdal Unit I is identified only in well 9/20b-2 on the western flank of the field, within an isolated fault-block. Heimdal Unit III comprises a Main Sand Unit overlain by an Inter-bedded Unit; only the Main Sand Unit is included in volumetric estimates of recoverable volumes for Unit III. 3. FIELD GEOLOGY

The Kraken field’s trap mechanism includes fault and dip closure on the western margin (the Kraken fault), dip closure to the south and stratigraphic pinch-out plus possible dip-closure to the north and east. The Kraken fault footwall has undergone some inversion and the subsidiary faults that splay from the main fault in the Central Core Area, appear to be evidence of footwall collapse and/or wrenching (Figure 3.1). Transpression on the sub-vertical Kraken fault would provide a mechanism for the rollover evident in the overlying Tertiary section. Extensional faulting is mapped at Top Main Sand level in the Northern Area, sub-parallel to the Kraken fault. Additional, sub-seismic faults may be present (i.e. with throws less than 25 m), which could offset the reservoir and/or act as baffles to fluid flow. It is possible that a proportion of the faults are syn-sedimentary and that they influenced the location and orientation of local channel bodies. The 9/02b-2 well is located in a separate fault block on the basis of both mapping and different pressure and fluid data compared to wells 9/02-1 and 9/02b-4 & -4z, -5 and -5z.

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FIGURE 3.1

HEIMDAL UNIT III GEOMODEL: TOP HEIMDAL UNIT III DEPTH SHADING AND FAULTS

9/02b- 3

9/02b- 2

9/02- 1A

9/02b- 4(Z)

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4. GEOPHYSICS AND SEISMIC MAPPING Following the award of Block 9/02b as a Promote Licence in 2003, Nautical purchased 2D speculative seismic data acquired by Spectrum (one survey) and Western (two surveys) in the 80s and 90s, plus a 3D speculative survey acquired by CGG in 1998, which was reprocessed and reinterpreted in 2004 and 2005. After initial interpretation of this local seismic data, the regional seismic mapping and well data base was expanded by Nautical and specialist studies initiated in rock physics and structural modelling. Following the unsuccessful 9/02b-3 well in 2008, the 3D seismic inversion model was revised and test high resolution 2D data acquired. In addition, revisions were made to the rock physics model and a 2D CSEM survey was acquired. A structural filter was applied to the 3D data and coloured inversion methods tried in an attempt to approximate the presence of pay within the Kraken “tank”. The top and base of the Main Sand Unit is frequently problematic to identify and map seismically throughout the whole field area due to a lack of an impedance contrast between the largely unconsolidated sands and the surrounding shale. The seismic mapping confidence generally deteriorates towards the south and appears to follow a quasi-linear, low sinuosity channel pattern elsewhere in the field. Forward seismic modelling from the well control has been reasonably thorough, including consideration of the most important variables likely to influence the Main Sand’s seismic reflection character. A clear improvement in resolution is evident on the far stack coloured inversion when compared to the full-stack processing. The zero crossing, far-stack coloured inversion (CI) seismic volume has been found to be the most reliable for top reservoir mapping and amplitude extraction. The top Heimdal III main sand is picked on a trough minimum, which brightens at far offsets, the brighter reflector indicating thicker and higher porosity sands; however, as the sands thin and porosity reduces the seismic amplitude dims and may phase-reverse (Figure 4.1). A simple polynomial function is sufficient to achieve time to depth conversion capable of top/base reservoir mapping accuracy to within 5 m. Base reservoir mapping is achieved using the conventional seismic volume. The apparently linear relationship between seismic amplitude and reservoir porosity-thickness has been used to estimate porosity directly from the far-stack 3D volume and propagate these porosities into the geo-cellular model. However, this approach may be an over-simplification and only be applicable over a very narrow range of reservoir thickness and porosity. The new, high quality 3D data set may resolve some of these issues.

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FIGURE 4.1

N – S SEISMIC LINE (INLINE 3260) ILLUSTRATING CORE AREA AND EXTENDED PICK

BaseTertiary

Top Heim III

Base Heim III

Top Heimdal III Main Sand pick on a trough minimum which brightens at far offsets.

Where the reflector is brighter it indicates the sand is thicker and of higher porosity.

As the sands become thin and lower porosity the seismic amplitude dims and may phase reverse.

INLINE3260

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5. STATIC MODEL

The 9/02b-2, 9/02-1, 9/02b-4 & -4z and 9/02b-5 & -5z wells are located within a very narrow, NNE-SSW corridor ca 1.5 km wide near the western margin of the mapped field limit and coincident with the submarine channel trend and orientation (Figure 5.1). Therefore, the application of a Net:Gross ratio of 1.0 throughout the geo-cellular model for the Main Sand Unit (actual values are 0.96, 0.88, 0.98, 1.0, 0.86 & 0.8) is optimistic. The 611 m open-hole section of the Main Sand Unit in the -5z horizontal well exhibits a Net:Gross ratio of 0.8 and is probably the most representative data point thus far.

FIGURE 5.1

KRAKEN GEOMODEL: TOP HEIMDAL UNIT III MAIN DEPTH

9/02b-4

9/02b-5

9/02-1

9/02b-29/02b-3

The construction of a seismic confidence map (referred by Nautical as the “holes” map) takes into account the ambiguities of the seismic pick for top and base reservoir and the limitations of porosity prediction directly from seismic amplitudes (Figure 5.2). Essentially, where seismic confidence is low, sand presence has been assumed to be zero, hence the apparent holes in the resultant map, albeit the broadly N-S lineation of excluded sand zones is suggestive of possible intra-channel areas, which lends geological credibility to the map. Employing this seismic confidence map as a filter to generate the most likely volumetric case would be consistent with the reliance on seismic attributes to delineate and characterise the reservoir. However, in recognition of the probability that moderate amounts of net sand could be present in the intra-high confidence areas, providing both in-place volume and connectivity, GCA considers that a Net:Gross ratio of 0.2 is appropriate as the basis for ‘Best Case’ modelling.

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FIGURE 5.2

NET:GROSS “HOLES” CASE

Net:Gross set to intermediate values in areas where amplitude response dims

Blue areas set to intermediate values

of net:gross

Red areas retain a net:gross value of 100% in all cases

Prior to drilling the 9/02b-5z well, the seismic character displayed on the arbitrary, coloured inversion line of the well trajectory suggested considerable rugosity on the top and base of the Main Sand Unit and the probable presence of lensoid bodies, which suggest individual channels. The probable presence of channels, visible in an axial orientation, suggests that although sheet sand geometry has been employed in the geo-cellular model, this is an over-simplification and baffles or barriers to fluid flow may be present in intra-channel areas. A prototype Schlumberger logging tool (the Deep Directional Resistivity tool) was run in the 9/02b-5z horizontal well and initial results suggest that the base and top of the Main Sand Unit exhibit rugosity more consistent with channelised sand deposition rather than sheet sand deposition. According to Nautical’s draft FDP, this well is “the first well to encounter stacked depositional units with intra-reservoir claystones, indicating that there are some horizontal baffles within the seismically-defined reservoir envelope.” These observations support Nautical’s interpretation of deposition from a channel thalweg migrating within a larger slope channel system.

In addition to the probable channelized nature of the Heimdal Member sands, the main sand or Unit III, demonstrates evidence for sand mobilisation soon after deposition via injectites (sedimentary dykes or sills) such as “Leaf 1” penetrated by the 9/02b-5 pilot hole. An OWC has not been proven in the Kraken field, only ODTs, the deepest of which is at -1,201 m TVDss in well 9/02b-5. In order to estimate a possible free water level (FWL), saturation-height curves from Bressay sands in nearby well 3/28a-4 were compared with the log-derived water saturation gradient from the Heimdal Units I and III in well 9/02b-2, resulting in a best estimate of -1,224 m TVDss. An upside FWL at -1,230 m TVDss was proposed by Nautical as a high case for volumetric estimation and this has been accepted as reasonable by GCA.

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6. PETROPHYSICS Petrophysical evaluation within the Heimdal Unit III main reservoir interval is relatively straightforward in that log data are reliable and supported/calibrated by core and test data. Clean sand analysis in the main sand allows porosity to be derived from the density log with a cross-check to the sonic log with matrix density at 2.65 g/cc and fluid density of 1.0 g/cc. Water saturation is calculated using the Archie equation where exponents ‘a’ is 0.62, ‘m’ or the cementation exponent is 2.15 and ‘n’ or the saturation exponent is 2.

The only unknown variable is water resistivity (Rw) as no water samples have yet been obtained in the field and only ODT fluid levels have been observed. Therefore, Rw is obtained by analogy using water samples from nearby well 3/28a-4. Saturation-height functions are derived from the saturation gradient seen in well 9/02b-2 as noted in Section 5 above.

Core porosity data from the 9/02b-5 pilot well and revised model porosities from the -5z well have been used to derive Low, Mid and High Case permeability-porosity transforms by plotting these data against air permeability either unconstrained (low), linked to a Mariner field data set (mid) or tied to 9/02b-2 mini drill-stem test data. These power functions have in turn been used with co-kriged total porosity mapping to produce low, mid and high permeability maps as input to dynamic simulation modelling. 7. RESERVOIR ENGINEERING Reservoir fluids data are available from tests carried out in the discovery well 9/02-1, vertical appraisal wells 9/02b-2 and -4 and horizontal appraisal well 9/02b-5z. The discovery well 9/02-1 achieved a successful DST (DST 2) from 1,179 m to 1,195 m (16 m) in the main sand of Heimdal Unit III, using 12”, 6 shots per foot perforating guns with a diesel cushion. On a 12/64” choke, the initial rate was 220 bopd at 180 psig Well Head Pressure (WHP). With the final choke set at 16/64”, the final rate was 43 bopd at 10 psig WHP. Downhole sampling was close to or above the bubble point (Pb) with a GOR range of 77-130 scf/Bbl. During the total flow period of 12 hours, 36.8 Bbl of oil was produced, with oil gravity recorded variously as 13.9o API at 60 degrees Fahrenheit (composite); 16.70 API (test report) and 15.30 API (PVT report). Dynamic viscosity was measured at 373 cP at 1000 F and 1,670 psig (reservoir pressure). Test-derived permeability was 3,700 mD and the well flowed naturally throughout the test period without depletion and with limited sand production. Appraisal well 9/02b-2 was completed without a DST, but obtained valuable PVT data from Mini Drill Stem Tests (MDTs) in the Heimdal Unit III reservoir section encountered. At the top of the reservoir section (1,176m), an oil gravity of 15.1 0API was recorded with a GOR of 147 scf/Bbl, a Pb of 1,445 psia and a viscosity of 120 cP at 930 F and 1,690 psia reservoir pressure (Pres). At the base of the reservoir interval (1,185 m), oil gravity was 14.80 API, GOR 111 scf/Bbl and Pb 1,240 psia. Unfortunately, too little fluid was recovered for a reliable viscosity measurement to be made.

The DST results from well 9/2b-4 provided some useful PVT data and valuable information regarding completion constraints. The interval between 1,198 m and 1,214 m was perforated overbalanced by 250 psi; a packer and screens were run with an ESP test string. Initial flow/pump rates were ca. 200 bopd with a PI of 2 bopd/psi; however, fluids were not produced to surface and after a shut-in period, the well was reopened and rates declined rapidly. Despite multiple attempts to pump the well, no significant flow was recorded and the Operator concluded that screens or perforation channels had become blocked by fine sand (Figure 7.1).

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FIGURE 7.1

9/02b-4 DST FLOW PERIODS

FP#1

PBU#1

FP#2

PBU#2

FP#3

PBU#3

IP#1

PFO#1

Initial Flow, Flowed 17bbls

Well shut-in due to darkness

Pump started but very little flow to surface

Injectivity test to check blockageII ~ 2bpd/psi. Pressure Fall-off

Main flow at declining rate. Final rate ~13bpd

Flowed 30 bbls

Final PBU

Both MDT and DST were attempted in well 9/02b-4, with oil gravity recorded at 13.40 to 140 API, GOR from 76 to 86 scf/Bbl and viscosity from 83 to123 cP at 1070 F, although with 5-9% oil-based mud contamination. In summary, fluid and pressure data indicate that wells 9/02-1 and 9/02b-4 are in pressure communication and that 9/02b-2 is a separate accumulation.

The most recent and first horizontal well 9/02b-5z tested at a stabilised rate of 4,000 bopd for 11.5 hours, the oil gravity was 140 API, GOR was 85 scf/Bbl with a viscosity at initial conditions of 162 cP and a bubble-point of 882 psia. The horizontal 8½” open hole (ca. 611 m gross) was completed with a gravel pack inside a pre-perforated liner and tested using an ESP. A series of flow and build-up periods were conducted up to a maximum flow rate of 4,500 bopd and well test analysis indicates a range of effective permeability from 3,500 to 5,000 mD. Based on a stabilised flow rate of 3,000 bopd and a final flowing pressure of 1410 psia the transient productivity index for 9/02b-5z is calculated by the Operator to be 10.1 bopd/psi.

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8. DYNAMIC MODEL In undertaking its work for Nautical GCA was provided with Nautical’s Eclipse dynamic model of the Heimdal Unit III/II reservoir over the Kraken field, which was based upon the static model that had been constructed prior to the drilling of the well 9/02b-5 & -5z. The Eclipse files included a High Confidence Model (HCM) dataset based upon a 19 well development programme (10 producers and 9 injectors) drilled from the two Drill Centres, 1 & 2 (Figure 8.1). The Full Field Model (FFM) is a separate dataset based upon all three drilling centres, i.e. with the addition of 6 producers and 5 injectors drilled from Drill Centre 3.

FIGURE 8.1

KRAKEN DEVELOPMENT AREA POROSITY MAP FROM SIMULATION MODEL

High ConfidenceModel Area

The STOIIP was the same in Nautical’s Best and High Cases in the FFM and the HCM, therefore the only difference is the number of wells employed in the Best and High Case developments. In the Low Case, the STOIIP in Nautical’s FFM and HCM employ a zero net to gross array where the seismic amplitude response was strongly diminished, i.e. weak or dim. In the HCM and FFM, Nautical assigned a Net:Gross ratio of 0.3 in the Best Case. In assigning recoverable volume estimates GCA made the following minor changes to Nautical’s HCM, which was judged by GCA to be generally robust: • Low Case: The STOIIP used by GCA matches that of Nautical, drawn from the

simulation model. Since the Free Water Level in the simulation model is based upon the ODT, the relative permeability files feature zero capillary pressure tables. GCA made two changes to Nautical’s Low Case model. Firstly, GCA used the Mariner field’s downside relative permeability tables with zero capillary pressure, leading to a decrease in forecast recovery. Secondly, GCA moved the completion layers to the top layers of the model, leading to an increase in recovery.

• Best Case: GCA used a Net to Gross array of 0.2 over areas with a weak seismic amplitude response compared with a value of 0.3 employed by Nautical, resulting in a reduced STOIIP in GCA’s model.

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• High Case: No changes were made, thus GCA’s STOIIP volume is identical to that of Nautical.

Table 8.1 summarises the range of recoverable volumes derived by GCA from the High Confidence Model.

TABLE 8.1

SUMMARY OF KRAKEN FIELD HCM RECOVERABLE VOLUMES

GCA HCM Volumes MMBbl

Low Best High 77 127 169

In preparing FFM forecasts, GCA made minimal changes to the input decks supplied by Nautical. In the Best Estimate (Figure 8.2) and Low Estimate cases GCA used Net:Gross arrays of 0.2 and 0.1 respectively, in the areas of weak seismic amplitude response, leading to slightly reduced STOIIP estimates in the GCA models. The only other change made by GCA was to the completion intervals in the Low Case, moving these up from simulation layer 4 to layer 2. GCA made no changes to the High Estimate case.

FIGURE 8.2

FULL FIELD MODEL BEST ESTIMATE CASE

P01

P02

P03

P04

P05

P06

P07

P08

P09

P10

P11 P12

P13 P14P15

P16

V04V05 I01

I02

I03

I04

I05

I06

I07

I08

I09 I10I11 I12

I13

As base case, except – Relative permeability downside– Water injection at reservoir temp

Gives reserves 169 MMstb (25 yrs)Basis for C2 contingent resourceDrill Centre 1

Drill Centre 3 Drill Centre 2

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The FFM forecasts derived from the inclusion of all three drilling centres includes the volumes to be produced from Drill Centre 3.

Table 8.2 summarises the range of the recoverable volumes derived by GCA from the Full Field Model:

TABLE 8.2

SUMMARY OF KRAKEN FIELD FFM

RECOVERABLE VOLUMES

This wide range of recoverable volumes reflects the inherent uncertainties in reservoir presence and performance at this early stage prior to field development following the results from the first horizontal well 9/02b-5z. When the new 3D seismic data are interpreted and the results of the Drill Centre 1 & 2 penetrations are available, the range of recoverable volume estimates may narrow. EnQuest has estimated base case recoverable oil at 177 MMBbl for both Phase 1 and Phase 2, which is comparable with the GCA Best Estimate for the FFM. GCA was not provided with data to review how EnQuest derived these volumes or whether they represent a like for like comparison with the GCA estimates. 9. DRAFT FIELD DEVELOPMENT PLAN The following description and commentary should be read in the context of an “as agreed FDP” prior to the change of Kraken field Operator. GCA acknowledges that EnQuest may modify the draft FDP following the interpretation of the 2011 seismic and further appraisal drilling of the Kraken field. Nautical’s draft FDP for Kraken, based on the FFM volumes, included three drill centres with 16 producers and 14 interspersed water injectors with a fan-like spacing of 400 m at the heel and 600 m at the toe of each horizontal well. The main recovery mechanism was water-flooding to maximise sweep efficiency with a line drive configuration at an approximately 1:1 injector to producer ratio. The development was via an FPSO with pre-drilled subsea tie-backs from three manifolds located in the Central (Drill Centre 1), Northern (Drill Centre 2) and Southern (Drill Centre 3) areas of the field. The FPSO was located near Drill Centre 1. The drilling programme outlined in the draft FDP began with the pre-drilling of 4 wells (2 producers and 2 injectors) at each of the first two Drill Centres using two rigs in parallel with an expectation of first oil in Q4 (October) 2015. All producers and injectors were planned as horizontal and these subsea completions were produced via Hydraulic Submersible Pumps (HSPs). Notably, HSPs have a proven track record on the analogous Captain field and could underpin flow assurance on Kraken as they are reported to have a P50 (50% probability) life in excess of 10 years. Completion of the first 8 wells at Drill Centres 1 & 2 was scheduled for Q4 2016 with development drilling beginning at Drill Centre 3, in the south of the field, in Q1 2017. The initial development drilling with first oil planned for October 2015, was intended to enhance understanding of the field’s production potential and to calibrate well to seismic ties prior to the commencement of the initial development at Drill Centre 3 and the drilling of the remaining 6 producers and 5 injectors at Drill Centres 1 & 2.

GCA FFM Volumes MMBbl Low Best High 100 172 273

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Under the Nautical FDP, the wells on the drilling centres would produce back to and be supported by a purpose-built FPSO. The production wells would be fitted with HSPs, with the hydraulic fluid being seawater in an open cycle configuration. Both injection and drive water would be heated to maintain reservoir and produced fluid temperatures. Injection water and HSP drive fluid would be conveyed in separate lines due to the higher drive fluid pressure meaning that all flow-lines were insulated. Produced fluids would be commingled into one production flow-line at each drilling centre, and a separate test flow-line was provided for each drilling centre, to allow a rotating well test programme via the test separator on the FPSO. Nautical had progressed development planning as far as well design, completions design and preliminary FPSO contractor selection, with an indicative FPSO lease contract. Subsea systems design has not progressed as far as the other elements, due to the shorter lead times. EnQuest currently anticipates a two-phase development of the Kraken field with Phase 1 consisting of the drilling of 8 producers and 6 injectors from Drill Centres 1 and 2, which focuses on the “Central Core Amplitude Bright-spot” and the “Northern Core Amplitude Bright-spot” (Figure 9.1). GCA understands that 5 producers and 4 injectors are considered for Drill Centre 1 and 3 producers plus 2 injectors for Drill Centre 2.

FIGURE 9.1

PHASE 1 AND PHASE 2 DEVELOPMENT AREAS

NOTE: Phase 1 targets the amplitude bright spots – dims are not confirmed by seismic and are undrilled Phase 2 (if implemented) will consist of drilling infill wells (2 producers and 3 injectors) at Drill Centre 2 and the previously planned drilling programme at Drill Centre 3 of 6 producers and 5 injectors. Prior to project sanction for the Phase 1 development, EnQuest intends to interpret the new 2011 3D seismic data and integrate these into a revised static model and dynamic model in order to confirm the development concept. EnQuest has advised that it will not proceed with

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the development of the Phase 2 area until the presence of oil-filled sands is confirmed by the drilling of two appraisal wells. 10. CONTRACT AND FISCAL TERMS The relevant elements of the UK fiscal regime for petroleum operations as they currently stand are summarised below and are assumed to remain constant going forward: • Royalty: not applicable, as Royalty was abolished from 1st January, 2003; • Petroleum Revenue Tax (PRT): is not applicable, as PRT was abolished for fields

given development consent on or after 16th March 1993; • Ring Fence Corporation Tax (RFCT) applies at 30%; • Supplementary Charge (SC) applies at 32%. A "field allowance" which removes from

the charge to supplementary charge a slice of production income applies to this field. The total field allowance available for a new Ultra heavy oil field is £800 million; and

• A Ring Fence Expenditure Supplement (RFES) of 10% applies to this field, the RFES allows the option to increase the value of losses carried forward from one period to the next by 10% for a maximum of 6 years, not necessarily consecutively.

Nautical considered the Kraken oil quality was expected to represent a 7% price discount relative to Brent. 11. CONTINGENT RESOURCE ESTIMATES

In the absence of an agreed and sanctioned FDP for Kraken the recoverable oil volumes are classified as Contingent Resources. In order for any proportion of these Contingent Resources to move into the Reserves category, a revised FDP must be agreed by the Kraken field owners, sanctioned by the EnQuest Board of Directors and its joint venture partner’s Boards of Directors and have a reasonable expectation of receiving DECC approval, in addition to the satisfaction of commerciality criteria including the future economics of the project and ensuring that development commences within a reasonable timeframe. GCA’s estimates of 1C, 2C and 3C Gross and Net EnQuest Working Interest Contingent Resources are summarised in Table 11.1 as at 31st March, 2012 and in Table 11.2 after the First Oil acquisition.

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TABLE 11.1

SUMMARY OF GROSS AND NET UNRISKED OIL CONTINGENT RESOURCES AS AT 31ST MARCH, 2012

Gross Contingent Resources

(MMBbl) EnQuest Net Working

Interest (%)

EnQuest Net Contingent Resources as at 31st March, 2012

(MMBbl) 1C 2C 3C 1C 2C 3C 100 172 273 45.0 45 77 123

Notes: 1. The meaningful Contingent Resource volume reported here is the 2C, or ‘Best Estimate’ value. 2. No economic limit cut off is applied for Contingent Resources. 3. The volumes reported here are “Unrisked” in the sense that “Chance of Development” values have not

been arithmetically applied to the designated volumes within this assessment. “Chance of Development” represents an indicative estimate of the probability that the Contingent Resource will be developed, which would warrant the reclassification of that volume as a Reserve.

TABLE 11.2

SUMMARY OF GROSS AND NET UNRISKED OIL CONTINGENT RESOURCES

AFTER FIRST OIL ACQUISITION Gross Contingent Resources

(MMBbl) EnQuest Net Working

Interest (%)

EnQuest Net Contingent Resources after Acquisition

(MMBbl) 1C 2C 3C 1C 2C 3C 100 172 273 60.0 60 103 164

Notes: 1. The meaningful Contingent Resource volume reported here is the 2C, or ‘Best Estimate’ value. 2. No economic limit cut off is applied for Contingent Resources. 3. The volumes reported here are “Unrisked” in the sense that “Chance of Development” values have not

been arithmetically applied to the designated volumes within this assessment. “Chance of Development” represents an indicative estimate of the probability that the Contingent Resource will be developed, which would warrant the reclassification of that volume as a Reserve.

GCA has considered its opinion on the Chance of Development that the Kraken project will progress and warrant re-classification as Reserves. At this time GCA considers that the factors requiring confirmation prior to such re-classification relate to the interpretation and incorporation of the 3D seismic and confirmation of the development concept through FEED and ultimately project sanction. EnQuest’s assessment of the Chance of Development is 90% for Phase 1 and 75% for Phase 2, contingent on the two proposed appraisal wells confirming the presence of oil filled sands. Based on GCA’s review and discussion with EnQuest, GCA concurs with the EnQuest assessment as fair and reasonable. 12. QUALIFICATIONS GCA is an independent international energy advisory group of nearly 50 years’ standing, whose expertise includes petroleum reservoir evaluation and economic analysis.

The report is based on information compiled by professional staff members who are either full time employees of GCA or senior associates.

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Staff who participate in the compilation of this report include Mr. B. Rhodes, Mr. J Weston, Mr. I Taylor and Mr. A Goodearl.

Mr. Rhodes holds a B.Sc. (Hons) Geology, is a member of the Energy Institute, the Petroleum Exploration Society of Great Britain, the Society of Petroleum Engineers and the European Association of Geoscientists and Engineers, and has more than 37 years industry experience. Mr. Weston holds a Bsc. (Hons) Geology and an MSc. Micropaleontology (Palynology), he is a member of the American Association of Petroleum Geologists, Petroleum Exploration Society of Great Britain, Geological Society, Society of Petroleum Engineers, and Energy Institute and has over 35 years experience. Mr. Taylor holds a B.Sc. Chemical Engineering and has over 35 years experience. Mr. Goodearl holds B.Sc. (Hons) Chemical Engineering and M.Eng. Petroleum Engineering, he is a member of the Society of Petroleum Engineers and the Energy Institute and has 40 years experience. 13. BASIS OF OPINION This assessment has been conducted within the context of GCA’s understanding of the effects of petroleum legislation, taxation, and other regulations that currently apply to these properties and GCA’s best professional judgement, subject to the generally recognised uncertainties associated with the interpretation of geoscience and engineering data.

GCA is not in a position to attest to property title or rights, conditions of these rights including environmental and abandonment obligations, and any necessary licences and consents including planning permission, financial interest relationships or encumbrances thereon for any part of the appraised properties. Further GCA is not in a position to comment on the likeliness or otherwise of the First Oil acquisition receiving DECC approval or completing. GCA is also not in a position to comment on the approval or otherwise of the change of operatorship from Nautical to EnQuest receiving DECC approval. GCA has no reason to believe that any material facts have been withheld from it, but does not warrant that its inquiries have revealed all of the matters that a more extensive examination might otherwise disclose. The opinions and statements contained in this report are made in good faith and in the belief that such opinions and statements are representative of prevailing physical and economic circumstances.

It should be understood that any determination of hydrocarbon volumes particularly involving petroleum may be subject to significant variations over short periods of time as new information becomes available and perceptions change. GCA does not guarantee the correctness or accuracy of any interpretation made by it and does not warrant that the opinions contained herein will be any form of guarantee of the outcome.

Yours faithfully GAFFNEY, CLINE & ASSOCIATES

Brian Rhodes Global Director – Corporate Advisory Services

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APPENDIX I

Abbreviated Form of SPE-PRMS

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Society of Petroleum Engineers, World Petroleum Council, American Association of

Petroleum Geologists and Society of Petroleum Evaluation Engineers

Petroleum Resources Management System

Definitions and Guidelines (1)

March 2007

Preamble Petroleum resources are the estimated quantities of hydrocarbons naturally occurring on or within the Earth’s crust. Resource assessments estimate total quantities in known and yet-to-be-discovered accumulations; resources evaluations are focused on those quantities that can potentially be recovered and marketed by commercial projects. A petroleum resources management system provides a consistent approach to estimating petroleum quantities, evaluating development projects, and presenting results within a comprehensive classification framework. International efforts to standardize the definition of petroleum resources and how they are estimated began in the 1930s. Early guidance focused on Proved Reserves. Building on work initiated by the Society of Petroleum Evaluation Engineers (SPEE), SPE published definitions for all Reserves categories in 1987. In the same year, the World Petroleum Council (WPC, then known as the World Petroleum Congress), working independently, published Reserves definitions that were strikingly similar. In 1997, the two organizations jointly released a single set of definitions for Reserves that could be used worldwide. In 2000, the American Association of Petroleum Geologists (AAPG), SPE and WPC jointly developed a classification system for all petroleum resources. This was followed by additional supporting documents: supplemental application evaluation guidelines (2001) and a glossary of terms utilized in Resources definitions (2005). SPE also published standards for estimating and auditing reserves information (revised 2007). These definitions and the related classification system are now in common use internationally within the petroleum industry. They provide a measure of comparability and reduce the subjective nature of resources estimation. However, the technologies employed in petroleum exploration, development, production and processing continue to evolve and improve. The SPE Oil and Gas Reserves Committee works closely with other organizations to maintain the definitions and issues periodic revisions to keep current with evolving technologies and changing commercial opportunities. The SPE PRMS document consolidates, builds on, and replaces guidance previously contained in the 1997 Petroleum Reserves Definitions, the 2000 Petroleum Resources Classification and Definitions publications, and the 2001 “Guidelines for the Evaluation of Petroleum Reserves and Resources”; the latter document remains a valuable source of more detailed background information., These definitions and guidelines are designed to provide a common reference for the international petroleum industry, including national reporting and regulatory disclosure agencies, and to support petroleum project and portfolio management requirements. They are intended to improve clarity in global communications regarding petroleum resources. It is expected that SPE PRMS will be supplemented with industry education programs and application guides addressing their implementation in a wide spectrum of technical and/or commercial settings. It is understood that these definitions and guidelines allow flexibility for users and agencies to tailor application for their particular needs; however, any modifications to the guidance contained herein should be clearly identified. The definitions and guidelines contained in this document must not be construed as modifying the interpretation or application of any existing regulatory reporting requirements. The full text of the SPE PRMS Definitions and Guidelines can be viewed at: www.spe.org/specma/binary/files/6859916Petroleum_Resources_Management_System_2007.pdf

1 These Definitions and Guidelines are extracted from the Society of Petroleum Engineers / World Petroleum Council /

American Association of Petroleum Geologists / Society of Petroleum Evaluation Engineers (SPE/WPC/AAPG/SPEE) Petroleum Resources Management System document (“SPE PRMS”), approved in March 2007.

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RESERVES

Reserves are those quantities of petroleum anticipated to be commercially recoverable by application of development projects to known accumulations from a given date forward under defined conditions.

Reserves must satisfy four criteria: they must be discovered, recoverable, commercial, and remaining based on the development project(s) applied. Reserves are further subdivided in accordance with the level of certainty associated with the estimates and may be sub-classified based on project maturity and/or characterized by their development and production status. To be included in the Reserves class, a project must be sufficiently defined to establish its commercial viability. There must be a reasonable expectation that all required internal and external approvals will be forthcoming, and there is evidence of firm intention to proceed with development within a reasonable time frame. A reasonable time frame for the initiation of development depends on the specific circumstances and varies according to the scope of the project. While 5 years is recommended as a benchmark, a longer time frame could be applied where, for example, development of economic projects are deferred at the option of the producer for, among other things, market-related reasons, or to meet contractual or strategic objectives. In all cases, the justification for classification as Reserves should be clearly documented. To be included in the Reserves class, there must be a high confidence in the commercial producibility of the reservoir as supported by actual production or formation tests. In certain cases, Reserves may be assigned on the basis of well logs and/or core analysis that indicate that the subject reservoir is hydrocarbon-bearing and is analogous to reservoirs in the same area that are producing or have demonstrated the ability to produce on formation tests.

On Production

The development project is currently producing and selling petroleum to market.

The key criterion is that the project is receiving income from sales, rather than the approved development project necessarily being complete. This is the point at which the project “chance of commerciality” can be said to be 100%. The project “decision gate” is the decision to initiate commercial production from the project.

Approved for Development

A discovered accumulation where project activities are ongoing to justify commercial development in the foreseeable future.

At this point, it must be certain that the development project is going ahead. The project must not be subject to any contingencies such as outstanding regulatory approvals or sales contracts. Forecast capital expenditures should be included in the reporting entity’s current or following year’s approved budget. The project “decision gate” is the decision to start investing capital in the construction of production facilities and/or drilling development wells.

Justified for Development

Implementation of the development project is justified on the basis of reasonable forecast commercial conditions at the time of reporting, and there are reasonable expectations that all necessary approvals/contracts will be obtained.

In order to move to this level of project maturity, and hence have reserves associated with it, the development project must be commercially viable at the time of reporting, based on the reporting entity’s assumptions of future prices, costs, etc. (“forecast case”) and the specific circumstances of the project. Evidence of a firm intention to proceed with development within a reasonable time frame will be sufficient to demonstrate commerciality. There should be a development plan in sufficient detail to support the assessment of commerciality and a reasonable expectation that any regulatory approvals or sales contracts required prior to project implementation will be forthcoming. Other than such approvals/contracts, there should be no known contingencies that could preclude the development from proceeding within a reasonable timeframe (see Reserves class). The project “decision gate” is the decision by the reporting entity and its partners, if any, that the project has reached a level of technical and commercial maturity sufficient to justify proceeding with development at that point in time.

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Proved Reserves

Proved Reserves are those quantities of petroleum, which by analysis of geoscience and engineering data, can be estimated with reasonable certainty to be commercially recoverable, from a given date forward, from known reservoirs and under defined economic conditions, operating methods, and government regulations.

If deterministic methods are used, the term reasonable certainty is intended to express a high degree of confidence that the quantities will be recovered. If probabilistic methods are used, there should be at least a 90% probability that the quantities actually recovered will equal or exceed the estimate. The area of the reservoir considered as Proved includes:

(1) the area delineated by drilling and defined by fluid contacts, if any, and

(2) adjacent undrilled portions of the reservoir that can reasonably be judged as continuous with it and commercially productive on the basis of available geoscience and engineering data.

In the absence of data on fluid contacts, Proved quantities in a reservoir are limited by the lowest known hydrocarbon (LKH) as seen in a well penetration unless otherwise indicated by definitive geoscience, engineering, or performance data. Such definitive information may include pressure gradient analysis and seismic indicators. Seismic data alone may not be sufficient to define fluid contacts for Proved reserves (see “2001 Supplemental Guidelines,” Chapter 8). Reserves in undeveloped locations may be classified as Proved provided that the locations are in undrilled areas of the reservoir that can be judged with reasonable certainty to be commercially productive. Interpretations of available geoscience and engineering data indicate with reasonable certainty that the objective formation is laterally continuous with drilled Proved locations. For Proved Reserves, the recovery efficiency applied to these reservoirs should be defined based on a range of possibilities supported by analogs and sound engineering judgment considering the characteristics of the Proved area and the applied development program.

Probable Reserves

Probable Reserves are those additional Reserves which analysis of geoscience and engineering data indicate are less likely to be recovered than Proved Reserves but more certain to be recovered than Possible Reserves.

It is equally likely that actual remaining quantities recovered will be greater than or less than the sum of the estimated Proved plus Probable Reserves (2P). In this context, when probabilistic methods are used, there should be at least a 50% probability that the actual quantities recovered will equal or exceed the 2P estimate. Probable Reserves may be assigned to areas of a reservoir adjacent to Proved where data control or interpretations of available data are less certain. The interpreted reservoir continuity may not meet the reasonable certainty criteria. Probable estimates also include incremental recoveries associated with project recovery efficiencies beyond that assumed for Proved.

Possible Reserves

Possible Reserves are those additional reserves which analysis of geoscience and engineering data indicate are less likely to be recoverable than Probable Reserves

The total quantities ultimately recovered from the project have a low probability to exceed the sum of Proved plus Probable plus Possible (3P), which is equivalent to the high estimate scenario. When probabilistic methods are used, there should be at least a 10% probability that the actual quantities recovered will equal or exceed the 3P estimate. Possible Reserves may be assigned to areas of a reservoir adjacent to Probable where data control and interpretations of available data are progressively less certain. Frequently, this may be in areas where geoscience and engineering data are unable to clearly define the area and vertical reservoir limits of commercial production from the reservoir by a defined project. Possible estimates also include incremental quantities associated with project recovery efficiencies beyond that assumed for Probable.

Probable and Possible Reserves

(See above for separate criteria for Probable Reserves and Possible Reserves.)

The 2P and 3P estimates may be based on reasonable alternative technical and commercial interpretations within the reservoir and/or subject project that are clearly documented, including comparisons to results in successful similar projects. In conventional accumulations, Probable and/or Possible Reserves may be assigned where geoscience and engineering data identify directly adjacent

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portions of a reservoir within the same accumulation that may be separated from Proved areas by minor faulting or other geological discontinuities and have not been penetrated by a wellbore but are interpreted to be in communication with the known (Proved) reservoir. Probable or Possible Reserves may be assigned to areas that are structurally higher than the Proved area. Possible (and in some cases, Probable) Reserves may be assigned to areas that are structurally lower than the adjacent Proved or 2P area. Caution should be exercised in assigning Reserves to adjacent reservoirs isolated by major, potentially sealing, faults until this reservoir is penetrated and evaluated as commercially productive. Justification for assigning Reserves in such cases should be clearly documented. Reserves should not be assigned to areas that are clearly separated from a known accumulation by non-productive reservoir (i.e., absence of reservoir, structurally low reservoir, or negative test results); such areas may contain Prospective Resources. In conventional accumulations, where drilling has defined a highest known oil (HKO) elevation and there exists the potential for an associated gas cap, Proved oil Reserves should only be assigned in the structurally higher portions of the reservoir if there is reasonable certainty that such portions are initially above bubble point pressure based on documented engineering analyses. Reservoir portions that do not meet this certainty may be assigned as Probable and Possible oil and/or gas based on reservoir fluid properties and pressure gradient interpretations.

Developed Reserves

Developed Reserves are expected quantities to be recovered from existing wells and facilities.

Reserves are considered developed only after the necessary equipment has been installed, or when the costs to do so are relatively minor compared to the cost of a well. Where required facilities become unavailable, it may be necessary to reclassify Developed Reserves as Undeveloped. Developed Reserves may be further sub-classified as Producing or Non-Producing.

Developed Producing Reserves Developed Producing Reserves are expected to be recovered from completion intervals that are open and producing at the time of the estimate. Improved recovery reserves are considered producing only after the improved recovery project is in operation.

` Developed Non-Producing Reserves Developed Non-Producing Reserves include shut-in and behind-pipe Reserves Shut-in Reserves are expected to be recovered from:

(1) completion intervals which are open at the time of the estimate but which have not yet started producing,

(2) wells which were shut-in for market conditions or pipeline connections, or

(3) wells not capable of production for mechanical reasons.

Behind-pipe Reserves are expected to be recovered from zones in existing wells which will require additional completion work or future re-completion prior to start of production. In all cases, production can be initiated or restored with relatively low expenditure compared to the cost of drilling a new well.

Undeveloped Reserves

Undeveloped Reserves are quantities expected to be recovered through future investments:

(1) from new wells on undrilled acreage in known accumulations,

(2) from deepening existing wells to a different (but known) reservoir,

(3) from infill wells that will increase recovery, or

(4) where a relatively large expenditure (e.g. when compared to the cost of drilling a new well) is required to

(a) recomplete an existing well or (b) install production or transportation facilities for primary or improved recovery projects.

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CONTINGENT RESOURCES

Those quantities of petroleum estimated, as of a given date, to be potentially recoverable from known accumulations by application of development projects, but which are not currently considered to be commercially recoverable due to one or more contingencies.

Contingent Resources may include, for example, projects for which there are currently no viable markets, or where commercial recovery is dependent on technology under development, or where evaluation of the accumulation is insufficient to clearly assess commerciality. Contingent Resources are further categorized in accordance with the level of certainty associated with the estimates and may be sub-classified based on project maturity and/or characterized by their economic status.

Development Pending

A discovered accumulation where project activities are ongoing to justify commercial development in the foreseeable future.

The project is seen to have reasonable potential for eventual commercial development, to the extent that further data acquisition (e.g. drilling, seismic data) and/or evaluations are currently ongoing with a view to confirming that the project is commercially viable and providing the basis for selection of an appropriate development plan. The critical contingencies have been identified and are reasonably expected to be resolved within a reasonable time frame. Note that disappointing appraisal/evaluation results could lead to a re-classification of the project to “On Hold” or “Not Viable” status. The project “decision gate” is the decision to undertake further data acquisition and/or studies designed to move the project to a level of technical and commercial maturity at which a decision can be made to proceed with development and production.

Development Unclarified or on Hold

A discovered accumulation where project activities are on hold and/or where justification as a commercial development may be subject to significant delay.

The project is seen to have potential for eventual commercial development, but further appraisal/evaluation activities are on hold pending the removal of significant contingencies external to the project, or substantial further appraisal/evaluation activities are required to clarify the potential for eventual commercial development. Development may be subject to a significant time delay. Note that a change in circumstances, such that there is no longer a reasonable expectation that a critical contingency can be removed in the foreseeable future, for example, could lead to a reclassification of the project to “Not Viable” status. The project “decision gate” is the decision to either proceed with additional evaluation designed to clarify the potential for eventual commercial development or to temporarily suspend or delay further activities pending resolution of external contingencies.

Development Not Viable

A discovered accumulation for which there are no current plans to develop or to acquire additional data at the time due to limited production potential.

The project is not seen to have potential for eventual commercial development at the time of reporting, but the theoretically recoverable quantities are recorded so that the potential opportunity will be recognized in the event of a major change in technology or commercial conditions. The project “decision gate” is the decision not to undertake any further data acquisition or studies on the project for the foreseeable future.

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PROSPECTIVE RESOURCES Those quantities of petroleum which are estimated, as of a given date, to be potentially recoverable from undiscovered accumulations. Potential accumulations are evaluated according to their chance of discovery and, assuming a discovery, the estimated quantities that would be recoverable under defined development projects. It is recognized that the development programs will be of significantly less detail and depend more heavily on analog developments in the earlier phases of exploration. Prospect

A project associated with a potential accumulation that is sufficiently well defined to represent a viable drilling target. Project activities are focused on assessing the chance of discovery and, assuming discovery, the range of potential recoverable quantities under a commercial development program. Lead A project associated with a potential accumulation that is currently poorly defined and requires more data acquisition and/or evaluation in order to be classified as a prospect. Project activities are focused on acquiring additional data and/or undertaking further evaluation designed to confirm whether or not the lead can be matured into a prospect. Such evaluation includes the assessment of the chance of discovery and, assuming discovery, the range of potential recovery under feasible development scenarios. Play A project associated with a prospective trend of potential prospects, but which requires more data acquisition and/or evaluation in order to define specific leads or prospects. Project activities are focused on acquiring additional data and/or undertaking further evaluation designed to define specific leads or prospects for more detailed analysis of their chance of discovery and, assuming discovery, the range of potential recovery under hypothetical development scenarios.

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RESOURCES CLASSIFICATION

PROJECT MATURITY

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APPENDIX II

Glossary

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GLOSSARY List of Standard Oil Industry Terms and Abbreviations ABEX Abandonment Expenditure ACQ Annual Contract Quantity oAPI Degrees API (American Petroleum Institute) AAPG American Association of Petroleum Geologists AVO Amplitude versus Offset A$ Australian Dollars B Billion (109) Bbl Barrels /Bbl per barrel BBbl Billion Barrels BHA Bottom Hole Assembly BHC Bottom Hole Compensated Bscf or Bcf Billion standard cubic feet Bscfd or Bcfd Billion standard cubic feet per day Bm3 Billion cubic metres bcpd Barrels of condensate per day BHP Bottom Hole Pressure blpd Barrels of liquid per day bpd Barrels per day boe Barrels of oil equivalent @ xxx mcf/Bbl boepd Barrels of oil equivalent per day @ xxx mcf/Bbl BOP Blow Out Preventer bopd Barrels oil per day bwpd Barrels of water per day BS&W Bottom sediment and water BTU British Thermal Units bwpd Barrels water per day CBM Coal Bed Methane CO2

Carbon Dioxide CAPEX Capital Expenditure CCGT Combined Cycle Gas Turbine cm centimetres CMM Coal Mine Methane CNG Compressed Natural Gas cP Centipoise (a measure of viscosity) CSG Coal Seam Gas CT Corporation Tax DCQ Daily Contract Quantity Deg C Degrees Celsius Deg F Degrees Fahrenheit DHI Direct Hydrocarbon Indicator DST Drill Stem Test DWT Dead-weight ton E&A Exploration & Appraisal E&P Exploration and Production EBIT Earnings before Interest and Tax EBITDA Earnings before interest, tax, depreciation and amortisation EI Entitlement Interest EIA Environmental Impact Assessment EMV Expected Monetary Value EOR Enhanced Oil Recovery EUR Estimated Ultimate Recovery FDP Field Development Plan FEED Front End Engineering and Design FPSO Floating Production, Storage and Offloading FSO Floating Storage and Offloading ft Foot/feet Fx Foreign Exchange Rate g gram g/cc grams per cubic centimetre gal gallon gal/d gallons per day G&A General and Administrative costs

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GBP Pounds Sterling GDT Gas Down to GIIP Gas initially in place GJ Gigajoules (one billion Joules) GOR Gas Oil Ratio GTL Gas to Liquids GWC Gas water contact HDT Hydrocarbons Down to HSE Health, Safety and Environment HSFO High Sulphur Fuel Oil HUT Hydrocarbons up to H2S Hydrogen Sulphide IOR Improved Oil Recovery IPP Independent Power Producer IRR Internal Rate of Return J Joule (Metric measurement of energy) I kilojoule = 0.9478 BTU) k Permeability KB Kelly Bushing KJ Kilojoules (one Thousand Joules) kl Kilolitres km Kilometres km2 Square kilometres kPa Thousands of Pascals (measurement of pressure) KW Kilowatt KWh Kilowatt hour LKG Lowest Known Gas LKH Lowest Known Hydrocarbons LKO Lowest Known Oil LNG Liquefied Natural Gas LoF Life of Field LPG Liquefied Petroleum Gas LTI Lost Time Injury LWD Logging while drilling m Metres M Thousand m3 Cubic metres Mcf or Mscf Thousand standard cubic feet MCM Management Committee Meeting MMcf or MMscf Million standard cubic feet m3d Cubic metres per day mD Measure of Permeability in millidarcies MD Measured Depth MDT Modular Dynamic Tester Mean Arithmetic average of a set of numbers Median Middle value in a set of values MFT Multi Formation Tester mg/l milligrams per litre MJ Megajoules (One Million Joules) Mm3 Thousand Cubic metres Mm3d Thousand Cubic metres per day MM Million MMBbl Millions of barrels MMBTU Millions of British Thermal Units Mode Value that exists most frequently in a set of values = most likely Mscfd Thousand standard cubic feet per day MMscfd Million standard cubic feet per day MW Megawatt MWD Measuring While Drilling MWh Megawatt hour mya Million years ago NGL Natural Gas Liquids N2 Nitrogen NPV Net Present Value OBM Oil Based Mud OCM Operating Committee Meeting ODT Oil down to OPEX Operating Expenditure

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OWC Oil Water Contact p.a. Per annum Pa Pascals (metric measurement of pressure) P&A Plugged and Abandoned PDP Proved Developed Producing PI Productivity Index PJ Petajoules (1015 Joules) PSDM Post Stack Depth Migration psi Pounds per square inch psia Pounds per square inch absolute psig Pounds per square inch gauge PUD Proved Undeveloped PVT Pressure volume temperature P10 10% Probability P50 50% Probability P90 90% Probability Rf Recovery factor RFT Repeat Formation Tester RT Rotary Table Rw Resistivity of water SCAL Special core analysis cf or scf Standard Cubic Feet cfd or scfd Standard Cubic Feet per day scf/ton Standard cubic foot per ton SL Straight line (for depreciation) so Oil Saturation SPE Society of Petroleum Engineers SPEE Society of Petroleum Evaluation Engineers ss Subsea stb Stock tank barrel STOIIP Stock tank oil initially in place sw Water Saturation

T Tonnes TD Total Depth Te Tonnes equivalent THP Tubing Head Pressure TJ Terajoules (1012 Joules) Tscf or Tcf Trillion standard cubic feet TCM Technical Committee Meeting TOC Total Organic Carbon TOP Take or Pay Tpd Tonnes per day TVD True Vertical Depth TVDss True Vertical Depth Subsea USGS United States Geological Survey US$ United States Dollar VSP Vertical Seismic Profiling WC Water Cut WI Working Interest WPC World Petroleum Council WTI West Texas Intermediate wt% Weight percent 1H05 First half (6 months) of 2005 (example of date) 2Q06 Second quarter (3 months) of 2006 (example of date) 2D Two dimensional 3D Three dimensional 4D Four dimensional 1P Proved Reserves 2P Proved plus Probable Reserves 3P Proved plus Probable plus Possible Reserves % Percentage

ENQUEST PLC(incorporated and registered in England and Wales under number 7140891)

(the “Company”)

NOTICE OF EXTRAORDINARY GENERAL MEETING

NOTICE IS HEREBY GIVEN that an Extraordinary General Meeting of the Company will be held at

12.00 noon on 16 July 2012 at the offices of CMS Cameron McKenna LLP, Mitre House, 160 Aldersgate

Street, London, EC1A 4DD, United Kingdom to consider and, if thought fit, pass the following Resolution

as an ordinary resolution:

ORDINARY RESOLUTION

That the Proposed Acquisition, on the terms and subject to the conditions set out in the Acquisition

Agreement (both as defined in the circular to shareholders dated 28 June 2012 (the “Circular”), a copy of

which was produced to the meeting and initialled by the Chairman for the purposes of identification) be and

is hereby approved for the purposes of Chapter 10 of the Listing Rules of the Financial Services Authority

and the directors of the Company (or a duly authorised committee of the directors of the Company) be and

are hereby authorised to conclude and implement the Proposed Acquisition in accordance with such terms

and conditions and to make such non-material modifications, variations, waivers and extensions of any of

the terms of the Proposed Acquisition and of any documents and arrangements connected with the Proposed

Acquisition as they may consider to be necessary or desirable to complete, implement and give effect to, or

otherwise in connection with, the Proposed Acquisition and any matters incidental to the Proposed

Acquisition.

Registered Office: By order of the BoardRex House Paul Waters

4-12 Regent Street Company Secretary

London 28 June 2012

SW1Y 4PE

Notes:

(1) Pursuant to Regulation 41 of the Uncertificated Securities Regulations 2001, the Company specifies that in order to have the right

to attend and vote at the Extraordinary General Meeting (and also for the purpose of determining how many votes a person

entitled to attend and vote may cast), a person must be entered on the register of members of the Company at 6.00 p.m. on

Thursday 12 July 2012 or, in the event of any adjournment, at 6.00 p.m. on the date which is two days before the day of the

adjourned meeting. Changes to entries on the register of members after this time shall be disregarded in determining the rights

of any person to attend or vote at the meeting.

(2) A member is entitled to appoint another person as his proxy to exercise all or any of his rights to attend, to speak and to vote at

the Extraordinary General Meeting. A member may appoint more than one proxy in relation to the meeting, provided that each

proxy is appointed to exercise the rights attached to a different share or shares held by him. A proxy need not be a member of

the Company. A form of proxy for the meeting is enclosed.

To be valid any proxy form or other instrument appointing a proxy must be received by post or by hand (during normal business

hours only) in accordance with the instructions printed on the form of proxy to arrive no later than 12.00 noon on 12 July 2012.

If you are a CREST Member, see note 3 below.

Completion of a form of proxy, or other instrument appointing a proxy or any CREST Proxy Instruction will not preclude a

member attending and voting in person at the meeting if he/she wishes to do so.

Shareholders may also submit their proxy electronically via the internet. Details on how to do this can be found on the form of

proxy.

(3) Alternatively, if you are a CREST Member, you may register the appointment of a proxy by using the CREST electronic proxy

appointment service. Further details are contained below.

CREST Members who wish to appoint a proxy or proxies through the CREST electronic proxy appointment service may do so

for the Extraordinary General Meeting and any adjournment(s) thereof by using the procedures, and to the address, described in

the CREST manual (available via www.euroclear.com/CREST) subject to the provisions of the Company’s articles of association.

CREST personal members or other CREST sponsored members, and those CREST Members who have appointed a voting

69

service provider(s), should refer to their CREST sponsor or voting service provider(s), who will be able to take the appropriate

action on their behalf.

In order for a proxy appointment or instruction made using the CREST service to be valid, the appropriate CREST message (a

“CREST Proxy Instruction”) must be properly authenticated in accordance with Euroclear UK and Ireland Limited’s

(“Euroclear”) specifications and must contain the information required for such instructions, as described in the CREST manual.

The message, regardless of whether it constitutes the appointment of a proxy or an amendment to the instruction given to a

previously appointed proxy, must, in order to be valid, be transmitted so as to be received by the issuer’s agent (ID RA10) by

12.00 noon on 12 July 2012. For this purpose, the time of receipt will be taken to be the time (as determined by the time stamp

applied to the message by the CREST applications host) from which the issuer’s agent is able to retrieve the message by enquiry

to CREST in the manner prescribed by CREST. After this time any change of instructions to proxies appointed through CREST

should be communicated to the appointee through other means.

CREST Members and, where applicable, their CREST sponsors or voting service provider(s) should note that Euroclear does not

make available special procedures in CREST for any particular messages. Normal system timings and limitations will therefore

apply in relation to the input of CREST Proxy Instructions. It is the responsibility of the CREST Member concerned to take (or,

if the CREST Member is a CREST personal member or sponsored member or has appointed a voting service provider(s), to

procure that his CREST sponsor or voting service provider(s) take(s)) such action as shall be necessary to ensure that a message

is transmitted by means of the CREST system by any particular time. In this connection, CREST Members and, where applicable,

their CREST sponsors or voting service provider(s) are referred, in particular, to those sections of the CREST manual concerning

practical limitations of the CREST system and timings.

The Company may treat as invalid a CREST Proxy Instruction in the circumstances set out in Regulation 35(5)(a) of the

Uncertificated Securities Regulations 2001.

(4) Any person to whom this notice is sent who is a person nominated under section 146 of the Companies Act 2006 (the “Act”) to

enjoy information rights (a “Nominated Person”) may have a right, under an agreement between him/her and the member by

whom he/she was nominated, to be appointed (or to have someone else appointed) as a proxy for the Extraordinary General

Meeting. If a Nominated Person has no such proxy appointment right or does not wish to exercise it, he/she may have a right,

under such an agreement, to give instructions to the member as to the exercise of voting rights.

The statement of the above rights of the members in relation to the appointment of proxies does not apply to Nominated Persons.

Those rights can only be exercised by members of the Company.

(5) Any corporation which is a member can appoint one or more corporate representatives who may exercise on its behalf all of its

powers as a member provided that they do not do so in relation to the same shares.

(6) Any member attending the Extraordinary General Meeting has the right to ask questions. The Company must cause to be

answered any such question relating to the business being dealt with at the meeting but no such answer need be given if (a) to do

so would interfere unduly with the preparation for the meeting or involve the disclosure of confidential information, (b) the

answer has already been given on a website in the form of an answer to a question, or (c) it is undesirable in the interests of the

Company or the good order of the meeting that the question be answered.

(7) A copy of the Acquisition Agreement is available for inspection at the Company’s registered office during normal business hours

from the date of this notice until the close of the Extraordinary General Meeting (Saturdays, Sundays and public holidays

excepted) and will be available for inspection at the place of the meeting for at least 15 minutes prior to and during the meeting.

A copy of this notice, and other information required by section 311A of the Companies Act 2006, can be found at

www.enquest.com.

(8) As at 27 June 2012 (being the last practicable date prior to the publication of this notice) the Company’s issued share capital

consists of 802,660,757 Ordinary Shares, carrying one vote each. Therefore, the total voting rights in the Company as at that date

are 802,660,757.

(9) You may not use any electronic address (within the meaning of section 333(4) of the Act) provided in this Notice of Meeting (or

in any related documents and proxy form) to communicate with the Company for any purposes other than those expressly stated.

70

DEFINITIONS

The following definitions apply throughout this document and the accompanying Form of Proxy, unless the

context requires otherwise:

Acquisition or Proposed Acquisition the proposed acquisition of the Kraken Interest pursuant to and in

accordance with the Acquisition Agreement

Acquisition Agreement the conditional agreement relating to the Proposed Acquisition, the

principal terms of which are summarised in Part III of this

document

Alma/Galia Farm-Out the disposal by EnQuest Heather of interests in the UKCS

petroleum production licences P.1765 and P.1825, and interests in

each of the UKCS Blocks 30/24b, 30/24c and 30/25c, further details

of which are set out in paragraph 6.7 of Part IV of this document

Alma Field the hydrocarbon accumulation underlying Block 30/24c and

Block 30/25c, known as the “Alma Field” as it may exist from time

to time

Articles the articles of association of the Company from time to time

Block a block on the UKCS

Board or Directors the executive and non-executive directors of the Company, as at the

date of this document whose names are set out on page 4 of this

document

Boepd barrels of oil equivalent per day

bopd barrels of oil per day

Brent Blend a blend of oil that is used as an international benchmark for the

prices of other crude oils

Britoil Britoil plc or any of its subsidiaries, as the case may be

Canamens Acquisition the acquisitions by the Company of the entire issued share capital of

Canamens Energy North Sea Limited and Canamens UK 814 and

815 Limited, further details of which are set out in paragraphs 6.1

and 6.2 of Part IV of this document

Capita Registrars Limited

Chairman the chairman for the time being of EnQuest

Companies Act the Companies Act 2006, as amended

Company or EnQuest EnQuest PLC, a public limited company incorporated in England

and Wales with registered number 7140891

Completion or Closing completion of the Proposed Acquisition in accordance with the

terms and conditions of the Acquisition Agreement

ConocoPhillips or Conoco ConocoPhillips (U.K.) Limited

CPR or Competent Person’s Report the independent competent person’s report produced by Gaffney,

Cline & Associates, a copy of which is reproduced in Part V of this

document

Capita or Capita Registrars or

Registrars

71

Crawford and Porter Acquisition the acquisition by the Company of interests in the Crawford and

Porter fields further details of which are set out in paragraph 6.3 of

Part IV of this document

CREST the relevant system (as defined in the CREST Regulations) for the

paperless settlement of share transfers and the holding of shares in

uncertificated form in respect of which Euroclear is the operator (as

defined in the CREST Regulations) in accordance with which

securities may be held and transferred in uncertificated form

CREST Member a person who has been admitted by Euroclear as a system-member

(as defined in the CREST Regulations)

CREST Regulations the Uncertified Securities Regulations 2001 (SI 2001 No. 3755) (as

amended)

DBSP the EnQuest  PLC Deferred Bonus Share Plan, further details of

which are set out in paragraph 6.3 of Part XI of the Prospectus

DECC the Department of Energy and Climate Change

Disclosure and Transparency Rules the disclosure and transparency rules relating to the disclosure of

information in respect of financial instruments which have been

admitted to trading on a regulated market or for which a request for

admission to trading on such a market has been made, as published

by the FSA of the United Kingdom

Don fields the Don Southwest field and the West Don field

the extraordinary general meeting of EnQuest at which a resolution

will be proposed to approve the Proposed Acquisition, and which is

set to be held at 12.00 noon on 16 July 2012, Notice of which is set

out at the end of this document

Enlarged Group the Group following Completion

EnQuest EnQuest PLC, a public limited company incorporated in England

and Wales with registered number 7140891

EnQuest Dons EnQuest Dons Limited, a company incorporated and registered

under the laws of England and Wales with registered number

3351775

EnQuest Britain EnQuest Britain Limited, a company incorporated and registered

under the laws of England and Wales with registered number

3628497

EnQuest Heather EnQuest Heather Limited, a company incorporated and registered

under the laws of England and Wales with registered number

2748866

EnQuest Thistle EnQuest Thistle Limited, a company incorporated and registered

under the laws of England and Wales with registered number

4487223

EU the European Union

EU ETS the European Union’s Emissions Trading Scheme

Euroclear the relevant clearing systems run by Euroclear UK & Ireland

Limited

EGM or Extraordinary GeneralMeeting

72

Facility Agreement shall have the meaning given to it in paragraph 6.6 of Part IV of this

document

Financial Services Authority or FSA the Financial Services Authority in its capacity as the competent

authority for the purposes of Part  VI of the FSMA and in the

exercise of its functions in respect of admission to the Official List

otherwise than in accordance with Part VI of the FSMA

First Oil First Oil and Gas Limited

FSMA the Financial Services and Markets Act 2000, as amended

GAAP the Generally Accepted Accounting Practices

Gaffney, Cline & Associates Limited, an independent consultancy

firm specialising in petroleum reservoir evaluation and economic

analysis

Galia Field the hydrocarbon accumulation underlying Block 30/24b, known as

the “Galia Field” as it may exist from time to time

Group the Company, its subsidiaries and its subsidiary undertakings

HSE Health and Safety and Environment

IFRS the International Financial Reporting Standards

Kraken Field the hydrocarbon accumulation underlying Block 9/2b and

Block 9/2c known as the “Kraken Field” as it may exist from time

to time as determined by the Secretary of State, but only to the

extent that it lies within the boundaries of Block 9/2b and

Block 9/2c

Kraken Interest an undivided legal interest in the UKCS petroleum production

licences P.1077 and P.1575, a 15 per cent. interest in each of UKCS

Blocks 9/2b, 9/2c, 9/6a and 9/7b, and beneficial interests in

ancillary documents and licences related thereto

Licence a UKCS petroleum licence

Listing Rules the rules and regulations made by the FSA in its capacity as the UK

Listing Authority under FSMA, and contained in the UK Listing

Authority’s publication of the same name

London Stock Exchange London Stock Exchange plc

Member State a member state of the EU

Merrill Lynch International Merrill Lynch International, whose registered address is at 2 King

Edward Street, London EC1A 1HQ and whose registered number is

02312079

MMbbl million barrels of oil

MMboe million barrels of oil equivalents

Nautical Nautical Petroleum PLC and Nautical Petroleum AG

Nautical Acquisition the acquisition by the Company from Nautical of interests in the

UKCS petroleum production licences P.1077, P.1573, P.1574 and

P.1575, and interests in each of the UKCS Blocks 9/2b, 9/2c, 3/22a,

Gaffney, Cline & Associates or

Competent Person or GCA

73

3/26, 9/6a, 9/7b and 9/1a, further details of which are set out in

paragraph 6.5 of Part IV of this document

Northern Producer FPF converted semi-submersible drilling rig of Aker H-3 design

Notice the notice of Extraordinary General Meeting, which is set out at the

end of this document

Obligors shall have the meaning given to them in the section “Risk Factors”

of this document

Official List the Official List maintained by the FSA pursuant to Part VI of the

FSMA

OPEC the Organisation of Petroleum Exporting Countries

OPPC the Offshore Petroleum Activities (Oil Pollution Prevention and

Control) Regulations 2005

Ordinary Shares or EnQuest Shares ordinary shares of £0.05 each in the capital of the Company

p or pence one hundredth part of one pound Sterling

PPC the Offshore Combustion Installations (Prevention and Control of

Pollution) Regulations 2001

Proposed Acquisition the proposed acquisition of the Kraken Interest pursuant to and in

accordance with the Acquisition Agreement

Prospectus EnQuest’s prospectus dated 18 March 2010 in relation to the offer

of 48,130,326 Ordinary Shares of 5 pence each

PRT the UK Petroleum Revenue Tax

PSP the EnQuest PLC Performance Share Plan, further details of which

are set out in paragraph 6.2 of Part XI of the Prospectus

Regulatory Information Service a Regulatory Information Service that is approved by the FSA and

that is on the list of Regulatory Information Service providers

maintained by the FSA

Remuneration Committee the remuneration committee of the Board

Resolution the ordinary resolution relating to the Proposed Acquisition set out

in the Notice of Extraordinary General Meeting, which is set out at

the end of this document

RSP the EnQuest PLC Restricted Share Plan, further details of which are

set out in paragraph 6.4 of Part XI of the Prospectus

Secretary of State the Secretary of State for the Department of Energy and Climate

Change

Shareholders the holders of Ordinary Shares from time to time

Share Plans the share plans of the Company, namely the EnQuest  PLC

Performance Share Plan, the EnQuest PLC Deferred Bonus Share

Plan and the EnQuest PLC Restricted Share Plan, further details of

which are set out in paragraph 6 of Part XI of the Prospectus

SPE the Society of Petroleum Engineers

74

SPE PRMS The Petroleum Resources Management System of the Society of

Petroleum Engineers, the World Petroleum Council, the American

Association of Petroleum Geologists and the Society of Petroleum

Evaluation Engineers, dated March 2007

SPL Sea Production Limited

Sponsor Merrill Lynch International

Stasco Shell International Trading and Shipping Company Limited

Sterling or £ or pound sterling the lawful currency for the time being of the United Kingdom

UK or United Kingdom the United Kingdom of Great Britain and Northern Ireland

UKCS the United Kingdom Continental Shelf

UK Listing Authority or UKLA the FSA in its capacity as the competent authority for the purposes

of Part VI of the FSMA

uncertificated a share or other security title to which is recorded on the relevant

register of the share or security concerned as being held in

uncertificated form in CREST or Euroclear and title to which may

be transferred by means of CREST or Euroclear

US or United States the United States of America, its territories and possessions and all

areas subject to its jurisdiction, any state of the United States of

America and the District of Columbia

US dollar or US$ or USD the lawful currency for the time being of the United States

75

sterling 158825