-7908

Jm Reply Refer Tot FO-2-1 .lyij n. 19*77

Enron OH 4 Gas Co. •any Attention! KA. Cheryl P. .or phy Pont Offiea Box U M Houaton* Toxaa 77251-1 ion

Contleaani

Rnfaranca It noon to your Supplsnontol Plan af Exploration reuolved July 17, 1907« for Leaso OCS-C". 7728* alucfc 71, tu/'na Itlsnd Aroa. This t>lan Include* tho actlvltiea propoaad fur ra i l C.

In accordance vita 30 CFK 2S0.B«, r*vU-.U Dacorttor 13* one got latter datvd January 79* 1979* thl* plan ta hereby ^ture^jnw to bo complete and 1. nov being conatdorod for approval.

Your plan control nuaber tc S-19Q0 aod should bo roferwcod In your ca.aun ication and correspondence concerning Ihl* plsn.

Si merely your**

(i**f» $90.) Wfffaji If* fJjrttn

3 , 0 . J . bourgeois Regional Supervisor Field Operations

bcci Laoao OCS-C. 7728 (OPS-3-2) (FILL KOOM (0PS-3-4 w/Publlc Info. Copy of tho plan (PUBLIC RECORDS)

HJTol bert icck 17/21/87! poacon

moot rvograra tarries*

AUG o 4 rm

ENRON Oil & Gas Company

P O 8 0 . 1188 Houtton. T * u i 77251-1188 (713) 853-6161

July 14, 1987

Department of the In*^r1or Minerals Management rv lce 1201 Elmwood Park Blvd. New Organs, Louisiana 70123-2394

At tn : Hr. Daniel Bourgeois Regional Supervisor Office of Field Operations

Re: OCS-G 7728, BLOCK 71 EUGENE ISLANO AREA SUPPLEMENTAL PLAN OF EXPLORATION

Gentlemen:

In accordance with 30 CFR 250.34, as amended, Enron 011 a Gas Company herein respectful ly submits for approval a Supplemental Plan of Exploration for lease OCS-G 7728 Block 71 , Eugene Island Area. Offshore, Louisiana.

Enron 011 4 Gas Company submits nine (9) copies of tne Plan of Exploration and Ai r Quality Review. Five (5) copies are considered "Proprietary Information" and are exempt from disclosure as allowed for In subsections (b ) , paragraph (9) of the Freedom of Information Act (81 Stat. 54; 5 U.S.C. 552) as amended by Public Law 93-502. Four (4) copies are considered Public Information and are marked as such. The Information believed to be ex?mpt Is geological and/or geophysical. As Uperator of th is lease, BelNorth Petroleum requests that this information and data be considered exempt and be dispensed for use onlv by the U.S. Government.

We anticipate a jack-up r i g available to d r i l l on th is lease approxluately September 1, 1987.

Very t ru ly yours,

Cheryl P. Murphy Regulatory Analyst

CPM/Jwc Enclosures

/5003T/ Port of th* Enron Croup of Energy Compom*«

ENRON OIL & GAS COMPANY SUPPLEMENTAL PLAN OF EXPLORATION

OC!»~u 7728

SECTION ITEM

Introductory Letter

Proposed Type ar.d Sequence of Exploration Ac t i v i t i es and Timetable

Description of D r i l l l n o Vessel

Safety and Environmental Safeguards, Including 011 Sp i l l Contingenry Plan

Approximate Location of Proposed Wells and Plat

Structural Interpretat ion and Shallow D r i l l i n g Hazards Report

Onshore *.pport Base Fac i l i t i es

Mud Components

Ai r Quality Review

/5003T-2/

Supplemental PLAN OF EXPLORATION

OCS-G 7728

PROPOSED TYPE AND SEQUENCE OF EXPL NATION ACTIVITIES AND TIMETABLE

Section 2

Enron Oil a Gas Company proposes to d r i l l 3 wells on Eugene Island Block 71 to evaluate tht subject lease to determine the potential for future development. Wells "A" and "B" wtrt previously approved on the In i t ia l Plan Of Exploration by the MMS on January 16, 1987.

Exploratory d r i l l i ng of the f i r s t well 1s scheduled to begin approximately September 1, 1987, subjtct to approval of this Supplemental Plan of Exploration and issuance of tht required Permit to D r i l l .

Exploratory act ivi ty should be complete January 1, 1988.

I t should be emphasized that this schedule 1s tentative 1n the meaning of 30 CFR 250.34-1 (a). Additional exploratory d r i l l i ng must be predicated upon the need to define structures and/or reservoir l imits. The fabrication and Installation of platforms, producing fac i l i t ies and pipelines are contingent upon the success of these wells. In addition to the dr i l l ing of wells, other activi t ies which may be conducted under this plan would be the setting of caissons or a template over temporarily abandoned wells, a velocity survey in a wellbore and soil boring.

ACTIVITY APPROXIMATE DATE

Dri l l Well C Sept. 1, 1987 to Oct. 1, 1987

/5003T-3/

SUPPLEMENTAL PLAN OF EXPLORATION

OCS-G 7728

DESCRIPTION OF DRILLING VESSEL

Section 3

The water depth 1n Block 71, Eugene Island ranges from approximately 19 to 20 feet.

A jack-up rig similar to J . Storm X will be utilized for exploratory drilling. A description of the diverter system Is Included In this section.

/5003T-4/

BLOWOUT PREVENTER SCHEMATIC

FILLUP LINE

c c

TO CHOKE MANIFOLD

3

FLOW LINE

13 5/8 ' -5000 + WP ANNULAR PREVENTER

3 13 5/8'-1O,000 +WP RAM TYPE PREVENTER (PIPE)

13 5/8'-10,000 V-WP RAM TYPE PREVENTER (SHEAR)

8POOL WITH 000 +WP OATE VALVES

RAM TYPE PF.cVENTER (PIPE)

10 B" Pnn«. Optr, Butterfly Valve

1" T M . C I . Str.

1 0* Hos*. BOO psi. 20' long

7 B* WECO Union, fig. ICO. ICOO y

1 " 1" Plot. ScM. 60

1 " 8* - 90 be] Elboe. Ei. Sir.

4 8- Blind Monqe. Ci. Str.

3 B* fe ld NccK flangr. £«. Str.

2 8* INH HyoV. Oper. Cott Vclvt

1 Olvtrtar Spool

ItM Description

Marino D r i l l i n g Company J Storm X

Divert*"* System Ooto. 27 Jire 1981 * r i PMS

•I .• i M * 1 •

. • . . . . . . . , i ,t-» - «t •f ••* •

•if* -af*" * | *J*f*TT.

j j W M t w f w Tar . . . . . .

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s*4*.* . • ..• ..• .....

. f «t -fr . . • j . « . • -

mm fc* •• •• •• «w

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• r« i»fc(k i k . - ' " j ' 1 • * - ..'^ a r r T . i 1 •! I I' • 1 l ' l ' I • R -x^r^ 1 *• *• ' •' -• . . A * % w ..i J J : • : . - . t .«••Hf i.» .» .• .* . . .. .

••* H •' ••* •* ** -* •1 -I "t ***** -i •' -t » j J .. . ' .J ..' ., -• .............. J J ... .1... J J J J . ... ..... ..... •......... „• „. J J J j i i j m L j m -• ... .............,>-•.•..>..*........... ^ i . .

ENRON Oil & Gas EUGENE ISLAND 71

LOUISIANA OFFSHORE

VICINITY MAP

E - 3 i 1 - i j t i

r (

•*«.

ENRON 100% $927,000

Exp. 7 / 3 1 / 9 0 yy.

71

S

Mobil OCS-3992

13,000"

Mobil OCS-3992

1 4 , 5 0 0 ^

OCS-G - 7728

ENRON Oil & Gas EUGENE ISLAND Blk. 71

LOUISIANA OFFSHORE

LAND PLAT «... 1 " = 2000 '

SUPPLEMENTAL PLAN OF EXPLORATION

OCS-6 7728

SAFETY AND ENVIRONMENTAL SAFEGUARDS

Section 4

Safety features during d r i l l i n g operations w i l l Include well control and blowout prevention equipment that meets or exceeds *he requirements of OCS Order No. 2.

011 1n any form shal l not be disposed of Into waters of the Gulf.

Liquid waste materials containing substances which may be harmful to aquatic l i fe or wi ld l i fe , or Injurious In any manner to l i fe or property shall be treated to avoid disposal of harmful substances Into the waters of the GuH.

D r i l l i n g muds containing o i l are not disposed of Into the Gulf. This type material is loaded and barged to shore for proper dispose*. D r i l l i n g mud containing toxic substances are neutral ized pr ior to disposal.

D r i l l cu t t ings , sand, and sol ids containing o i l are not disposed of Into the Gulf, unless the o i l has been removed.

The subject offshore mobile d r i l l i n g un i t 1s equipped * i t h dr ip pans under the r i g f l oo r . Al l o i l from diesels engines 1s pumped to a sump and then pumped Into barrels for return to an onshore s i t e .

Operator personnel are Instructed In the techniques and methods necessary to prevent po l l u t i on . Non-operator oersonnel are Instructed and supervised to Insure that non-pol lut ion practices are adhered to .

Tlie f a c i l i t i e s are inspected da i l y .

OIL SPILL CONTINGENCY PLAN

Enron Oil 4 Gas Comoany has an approved Oil Spi l l Contingency Plan on f i l e with the M.M.S. dated December, 1982. The updated plan was submitted to the M.M.S. o f f i ce January 29, 1987. This plan designates an Oil Sp i l l Team consist ing of Enron Oil & Gas Company personnel and contract personnel.

This team duties are to eliminate the source of the o i l s p i l l , remove a l l sources of possible i gn i t i on , deploy the most viable means of avai lable transportat ion to monitor the movement of the s l i c k , and contain and remove the sl ick i f possible.

/5003T-5/

OIL SPILL CONTINGENCY PLAN Page 2

Enron Oil A Gas Company 1s a member of Clean Gulf Associates (CGA). The CGA has four pennanent bases in Louisiana; at Venice, Grand I s l e , Intracoastal City and Cameron, and two bases in Texas; at Galveston and Rockport. Each base Is equipped wi th fast response skimmers and there 1s a barge mounted high volume open sea skimmer based at Grand Is le . In addit ion to providing equipme!.*, the CGA also supplies advisors for clean up operations. Response time for a s p i l l 1n Eugene Island 71 could vary from 10 to 16 hours depending upon the location of the company operated workboats or workboats available for charter.

/5003T-6/

SUPPLEMENTAL PLAN OF EXPLORATION

OCS-G 7728

LOCATION OF PROPOSED WELLS ANO P' AT

Section 5

WELL

C

SURFACE LOCATION

600' FSL & 4625' FEL

_ ENRON 1X0%

$927,t»*Q Exp. 7 /3 \ , 90

71

Mobil OCS-3992

14,500^" OCS-G • 7728s

4

Mobil > OCS-3992

13,000

2850'

FNRON Oil & Gas I EUGENE ISLAND Blk. 71

LOUISIANA OFFSHORE

WELL LOCATIONS «"•' 1 " = 2000 '

SUPPLCMENTAL r-L'%14 OF EXPLORATION

OCS-G 7728

STRUCTURAL INTERPRETATIONS AND SHALLOW PP.: LLI NG HAZARDS REPORT

Section C

Enron Oil 4 Gas Company has reviewed a l l available data over and proximo to the surface locations of the proposed wells a t thei r various locations in Eugene Island Block 71 . This data Indicates no shallow hazards ave expected p r i o r to sett ing surface casing. See attached geophysical weH s i t u analysis.

In accordance -".th NTL-83-3 paragraph I I , #A.5, a copy of the high- resolut ion survey data from the two l ines closest to the proposed well w i l l be forwarded to the d i s t r i c t o f f i ce when the POE Is submitted.

/5003T-9/

SU ELEMENTAL PLAfc OF EXPLOIT'ON

OCi--G 7728

ONSHORE SUPPORT BAbE FACILI!ICS

Section 7

Enron 011 * Gas Company w i l l us i ex st ing onshur;- support base f a c i l i t i e s of Cameron, Louisiana. This w i l l serve as port of Jebarkat.cn for supplies and crew?. No onshore expansion or construction is anticipated with respect to t h i s a c t i v i t y .

This base Is r ooL«ie of providing the services recessary for the proposed a c t i v i t i e s . has 24 hour service, a ra-'io tow - with phor.e patch, dock space, equi , t and supply storage space, d r ink i rg and d r i l l water, e tc .

Response time from Cameron,Louisiana to Eugene Island Block 71 would be approximately 5 . ) hours for crewboats and 7.0 hours for workboats.

/5003T-11,'

SUPPLEMENTAL PLAN OF EXPLORATION

OCS C 7728

MUD COMPONENT:

Section 8

JOMPARABLF. MUD PRODUCTS

I. ITt.'tS USEb ON \ ROUTINE BASIS

M I MUD MILPARK MAGCOBAR DESCRIPTION

Imco Bar

Imco Gel

IMCO Lig

Ro-in

Caustic Soda

Aluminum Stearate

Lime

Imco Thin

Soda Ash Bicarb

Poly Rx

Imco MD

Foamban

/5003T-1?/

Bantv/MUbar

Milgel

Ligco

Uni Cal

Aluminum Stearate

!.1me

•1gcon

Sode. Ash Bfcirb

Ch&iitrol -

M.D.

LD-8

Barite/Magcobar

Magcogel

Tannathin

Spercene

Hydroxide

Aluminum Stearate

Lime

X. -20

Soda Ash Bicarb

Reslnex

D-D

Magconol

Barite

Bentonite

Ligni te

Blended Lignosul fouat*

Aluminum Stearate

Calcium Hydroxide

Mod f led Ligni te

Sodium Carbonate Bicarbonate of Soda

Selected Polymer Blend

Detergent

Defoamer (Usually alcohol based)

I I . ITEMS USED LESS FREQUENTLY

M I MUD

DMS

Imco Loid

CMC.

Cypan

Permalold

Drispac

Gyp

HME/«uper Jr1l

MILPARK

DMS

Mil starch

CMC

Cypan

Perma-Lose

Drlspar

Gyp

HME/Superdrll

MAGCOBAR

DMS

My Lo Gel

CMC

Cypan

Poly Sal

Dr1spac

Gyp

HME/Superdr1l

Black Magic Supermix

Lubrlkleen

Imco Myca

Imco Plug

Ironlte

/5003T-13/

Black Magic

Lubrlsal

Mil-Mica

Mil Plug

I ronl te

M11 Gard

Black Magic Supermix

Mago'iube

Mago-Mica

Nut Plug

Ironite

DESCRIPTION

Nonionic Mud Surfactant

Pregelantinized Starch

Sodium Carboxy Methyl Cellulose

Sodium Polyacrylate

Organic Polymer

Polyanionln Cellulose

Gypsum (Plaster of Paris)

Gi lsonite (Treated) Natural Hydro- carbons • Wetting Agent

Mud Concentrate fc r spott ing f l u i d

Organic Lubrica,it

Mica-Flaxes

Ground Walnut or other nut hu l ls

Synthetic Iron Oxide, H2S Scavenger

H2S Scavenger (Zinc Carbonate)

Projected Air Emissions Enron 011 & Gas Company Eugene Island 71 Page 2

MINOR SOURCES (OFFSHORE)*

Including helicopter landing and take-off (8 trips/week); supply boat (5 trips/week); crew boat (3 trips/week); and loading and unloading operations; and incineration of waste paper (average 750 pounds of waste per month).

Projected Emissions Emitted (tons/year) Substance 1987

CO .20 SO .01 2

NOX .04 VOC .02 ISP .01

• Tables 3.2.1-3, 3.2.3-1, and 2.1, "Compilation of Air Pollutant Emission Factors", Third Edition, EPA Report AP-42. August, 1977.

TOTAL ALL SOURCES (TONS/YEAR)

1987 CO SO ~~2

NOX VOC TSP

Major Minor Total

2.22 .71

•* 10.45

10775

.84

i i .74

i $ ONSHORE SOURCES

These should be about the same as minor sources unless new facilities are Installed at the onshore base. No additional facilities are required or planned at this time.

EMISSION EXEMPTION DETERMINATION

2/3 2/3 For CO: E - 3400D - 3400 (25) - 29,070 tons/year For NOX. VOC. TSP & SO : E - 33.30 - 33.3 (25) - 833 tons/year

2

As per DOI/MMS regulations, this facility s exempt from further air quality review as i t has boon determined that Its operations will not have significant adverse environmental impact on air quality.

I I . ITEMS USED LESS FREQUENTLY (CONT.)

M I MUD MILPARK

Separan

Salt

SAPP

Separan

Salt

SAPP

MAGCOBAR

Separan

Salt

SAPP

Shale Trol

KCL KCL

I I I . OIL BASE MUD

Mil-Free Imco Spot

Kenol-S Carbo-Tec

KCL

Pipe Lax

011 faze A Ver to 11

Ken-Gel Carbo-Gel VG-69

Ken-Cal-L Carbo-Mul DV-33

VR Carbo-Trol DV-22

DESCRIPTION

Polyacrylamlde Polymer

Sodium Chloride

Sodium Acid Pryophosphat*

Ograno/Aluminum Compound

Potassium Chloride

Emulsif lers for spott ing f l u i d

Emuls i f lers, ge l l ing agents and f l u i d loss agents for o i l muds

Organlphl l lc clays for v lscos l fy lng

Asphaltic V iscos i f ier

Organic wett ing agents.

Fluid loss agents

/5003T-14/

PROJECTED AIR EMISSION SCHEDULE FOR EXPLORATION PROJECT

GENERAL INFORMATION

Location of Facility:

Distance Offshore: Name of R1g/Platform: Operator:

Contact Person' Total Well Footage to be Drilled: Date Drilling Will Begin:

Eugene Island 71 OCS-G 7728 25 miles Jackup Enron Oil & Gas Company 1400 Smith Houston, Texas 77002 Ms. Cheryl Murphy 11,200' September 1, 1987

MAJOR SOURCE (OFFSHORE)

Power used aboard drilling vessel; approximate footage drilled 11,200'.*

Projected Emissions ear Emitted

Substance (lbs/day**^tons/y<

CO SO

2

(148) 2.22 (47) .71

NOX VOC TSP

(694) 10.45 (56) .84 (49) .74

Based on 60 hphr/ft. from Table 4-3, "Atmospheric Emissions from Offshore 011 and Gas Development and Production", EPA No. 450/3-77-026, June, 1977.

Emission factors from Table 3.3.3-1, "Compilation of Air Pollutant Emission Factors:, Third Edition, EPA Report AP-42, August, 1977.