Ultra Low

Invasion

Additive and

Wellbore

Stabiliser

STAR SHIELD® 500

2

Sealing Capacity and

Key Benefits

STAR SHIELD® 500 –

An Expansion of Impact’s

FLC 2000® Technology

3

STAR SHIELD® 500 – Seals up to 500um fractures

Fast effective barrier laid down across highly permeable formations or micro-

fractures whether induced or in situ.

Preventative approach rather than curative: it’s already active in the fluid

circulating system at the start of the hole section.

• Quick effective wellbore isolation – minimize whole mud, or spurt, and pressure invasion

• Seals a broad range of pore throats (matrix) and microfractures

• Bridge at neck of pore throats or fractures

• Seal is robust, flexible and will withstand high pressure differential

• Whole mud additive which is:

o Dispersed throughout the active system

o Constantly laid down

o Self-repairing filter cake

o Not being depleted by drilling action

4

STAR SHIELD® 500 – Key Benefits

The only additive that truly provides preventative formation deformation control and

available in the industry today.

• Products are in the circulating system continuously treating the formation

• Functions in both OBM & WBM

• Functions in all lithology's including reservoir

• Seals up to 500um fractures at high differential pressure (over 3,000psi)

• Low additive loading

o Easier to mud engineer

o Less complex solids control

o Minimal impact on basic mud properties

o Product is robust – not shear degraded

5

STAR SHIELD® 500 – Key Benefits

Let’s design a reservoir fluid that can be compliant in the field not just the lab!

• Use at 4-8ppb rather than the 30-50ppb required for stress caging

• No adjustments to the basic mud formulation required

• Thermally stable to 400 degF

• Product is robust – not shear degraded

• Does not require specialist solids control equipment (no LCM recovery system)

• Makes fluids more tolerant “field engineering wise”o Managing solids loading & psd for Carbonate / graphite mixes?

• Tolerant to contaminants

• Makes fluid compliant to wellbore geology heterogeneity.

o Covers low permeability represented by API & HTHP filter-paper through to 500um micro-fractures

6

STAR SHIELD® 500 – Conventional bridging

solutions

API products provide bridging allowing pressure and fluid invasion

into the geological matrix

Filtrate & pressure invasion

creates two time

dependencies

• Short term – pressure

dominated [sec/mins]

• Long term – filtrate dominated

[hours]

Influenced by Δρ, geology &

mud chemistry

7

STAR SHIELD® 500 - Conventional bridging

solutionsThe same invasion control process is relevant to both wellbore stability and formation damage.

8

STAR SHIELD® 500 – Seal 500um fractures

9

STAR SHIELD® 500 at 6ppb

• Before Hot Rolling; Test Pressure: 1,000 psi

• Initial Spurt after 1minute

• Total Fluid Loss: 1 minute volume + 15minute volume

10

STAR SHIELD® 500 - Effect of screening on PSD.

How much STAR SHIELD 500 is lost when screened over a #40 mesh screen?

How will the losses affect consumption rates?

Notes: theoretical calculations. In practice, amount of depletion in field conditions

is likely to vary due to screen condition, flow rate & mud rheology etc…

X025 Referred to above is the R&D name of STAR SHIELD® 500

11

STAR SHIELD® 500 – PPA

• OBM Conditioned 250F 16 hours

• Test temperature: 250F(WBM), 300F(OBM),Test Pressure:2000psi

12ppg XC Polymer Mud 12ppg 80:20 OBM

Disk PPA Testing ProductInitial Spurt

(mL)

Total Fluid Loss

(mL)

Initial Spurt

(mL)

Total Fluid Loss

(mL)

120 Base 36.8 129.5 2.6 9.0

1206ppb STAR SHIELD

50011.2 45.4 0.3 2.4

150 Base TFL (Pressure not held)

1506ppb STAR SHIELD

50014 56.1 5.0 16.3

190 Base TFL (Pressure not held)

1906ppb STAR SHIELD

50020 70.5 17.2 52.5

12

STAR SHIELD® 500 vs FLC 2000® - SBT

• OBM Conditioned 250F 16 hours

• Test Pressure: 100 psi, 20/40 Frac Sand

12ppg XC Polymer Mud 12ppg 80:20 OBM

Initial

Invasion

(cm)

Final Invasion

(cm)

Initial

Invasion

(cm)

Final Invasion

(cm)

4ppb STAR SHIELD

5001.3 1.4 2.3 2.3

6ppb STAR SHIELD

5001.3 1.6 1.9 1.9

13

STAR SHIELD® 500 HP SBT - 8.5ppg OBM

• 8.5ppg 80:20 OBM Conditioned 250F 16 hours, modified PPA

• Test Pressure: 1,000psi (gas), 30 minute test duration

• Test media as shown on chart.

8.5ppg OBM

14

STAR SHIELD® 500 HP SBT -12ppg OBM

• 12ppg 80:20 OBM Conditioned 250F 16 hours, modified PPA

• Test Pressure: 1,000psi (gas), 30 minute test duration

• Test media as shown on chart.

12ppg OBM

15

STAR SHIELD® 500 – 12ppg WBM Rheology

12ppg WBM

Test

Temperature(

F)

600 300 200 100 6 3 10s/10m PV/YP

Base Only 120 75 52 42 29 9 6 8/9 23/29

6ppb STAR

SHIELD 500

(sieved

425µ

screen)

120 73 53 42 30 8 6 7/8 20/33

Base Only 150 61 43 35 25 7 5 7/7 18/25

6ppb STAR

SHIELD 500

(sieved

425µ

screen)

150 54 40 33 23 6 4 5/6 14/26

16

STAR SHIELD® 500 – 12ppg 80:20 OBM Rheology

• OBM Conditioned 250F 16 hours.

12ppg OBM

Test

Temperatu

re(F)

600 300 200 100 6 3 10s/10m PV/YP ES

Base Only 120 83 59 49 37 19 17 18/21 24/35 848

6ppb STAR

SHIELD 500

(sieved 425µ

screen)

120 87 62 52 40 21 19 19/23 25/37 798

Base Only 150 75 55 43 33 17 15 17/18 20/35 868

6ppb STAR

SHIELD 500

(sieved 425µ

screen)

150 82 60 49 38 20 18 19/21 22/38 682

17

STAR SHIELD® 500 – Formation Damage WBM

18

STAR SHIELD® 500 – Formation Damage OBM

• 12ppg 80:20 invert emulsion OBM (IFS), mineral oil for drawdown

• Dynamic flow across core faces

19

Case history

20

Well Name: Pool A3

Location: Ector County, TX Midland

Basin

Interval drilled:

Upper Spraberry HZ - 4 3⁄4” hole,

7,796ft -10,095ft MD

No wellbore instability or wash-out

3 ½ in liner was run & cemented in

upper Spraberry without any downhole

losses

Permian – Wolfberry

21

Summary

22

STAR SHIELD® 500 – 500um fractures

• Product data indicates it performs very well across a broader fracture size

o 6ppb works well across all slot sizes.

o Product works well up to 500µm.

• LC50 at 15ppb is 255Kppm.

• Plonor classification for Eastern Hemisphere

• This product would work well with shakers up to 60 mesh but consumption will be

aggressive after that.

• Lab test phase complete; we now require field-trial partners to validate initial

testing

o Product available on trial commercial terms

o Requirement to share all pre job data to identify suitable candidate well(s)

o Requirement to share all post job data to build case histories

Impact Fluid Solutions Ltd

Ella Court, Truro Business Park,

Threemilestone, Truro,

Cornwall, England TR4 9NH

United Kingdom

+44 1872 261 613

www.impactfluids.net