RD2003-030 System Enhancements

System Enhancements, RD2003-030, Priority 4

Improve and enhance the performance and/or add value to existing systems through the application of existing or new technologies

Priority Manager DescriptionRD2003-030 System Enhancements 4 1.95 Popplestone

a Drilplex - inhibitor/lubricant/FLC 0.25 0.60 Cliffe Develop additives to increase the technical application of the DRILPLEX system.

b HTHP Sildril 0.02 0.75 AlfordEstablish the temperature and weight performaqnce envelope

of the Sildril system using all available company additives and new ones as they become available

c Low Cost Ecotrol 0.1 0.55 Chapman To source a product that delivers comparable technical performance at a minimum 20% improvement in cost

d Polymer stabilizer for HT WBM 0.2 0.05 BallardGenerate further lab data to support the existing evidence

that Gallic Acid is an effective WBM Temperature Stabiliser

Manpower Project timeline

RD2003-030A Drilplex

RD2003-030A - Drilplex

DescriptionDescription Develop additives to increase the technical application of the DRILPLEX

system. Technical targets are: enhanced chemical shale inhibition, better fluid loss control and increased lubricity. Additives should not have a significant adverse effect on fluid properties and are low cost.

ApproachApproach Compatibility study using commercially available, low cost, regionally

available additives. Include new technology additives where appropriate.

DeliverablesDeliverables Effective shale inhibitor package for the DRILPLEX system (end Q2). Filtration control additive, better cost/performance than FLOPLEX (Q3). List of candidate lubricants from compatibility study. Temperature limitation of the DRILPLEX HDD system determined (Q4).

2003-030A - MSP Gantt Chart

ID Task Name

1 Project Authorization

9 Phase 1: Shale inhibition

10 Review background work

11 QC bentonite/ Standard mixing procedure

12 Compatibility tests with polymeric shale inhibitors

13 Compatibility tests with K salts

14 Compatibility tests with shale swelling inhibitors

15 Meeting with Huntsman

16 Order/ cut Oxford clay blocks

17 Inhibition bench marking tests

18 Long term mud stability tests/ limitations

19 Recommendations to Marketing

20 Phase 2: Improve fluid loss control

21 Evaluate alternative FLCA's

22 List of new FLCA's

23 Phase 3: Lubricant Testing

24 Lubricant compatibility tests

25 Environmental registration (new products)

26 Recommendations for LEM III testing

27 LEM III Testing (ETC)

28 Recommendations to Marketing

29 Phase 4

30 Determine temperature limitation of Drilplex HDD

31 Phase 5: Further Documentation

16/04

01/07

05/08

29/08

29/09

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec JanQ1 Q2 Q3 Q4 Q1

Resource: 6 months Time spent: 3 months 40% complete

128

76

139

121

106104

114

5.515.7

2819

6 7.522.7

Base 3% KCl 2.8%K2CO3

4.3% Kcitrate

0.9%TKPP

1.7%TKPP

3.4%TKPP

API FL (mL) YP

1179

3470

2754

1557

4968

63216646

Base 3% KCl 2.8%K2CO3

4.3% Kcitrate

0.9%TKPP

1.7%TKPP

3.4%TKPP

Hardness (g/mm)

RD2003-030A - Drilplex

Potassium Salts in fresh water-DRILPLEX

Viscosity hump/ transient flocculation effect with all K salts, except TKPP. Hardness data from Oxford clay cubes after recovery from fluids (150°F/ 16hrs).

89

6255

28

64

5.5 9.5 8.6 11 9

Base 1.5%EMI-733

3% EMI-733

1.5%EMI-578

3% KLA-CURE

API FL (mL) YP

1066

3611

5278

46984145

Base 1.5%EMI-733

3% EMI-733

1.5%EMI-578

3% KLA-CURE

Hardness (g/mm)

EMI-733 and KLA-CURE have minimal effect on fluid properties. EMI-578 destroys DRILPLEX rheology.

RD2003-030A - Drilplex

Amine based Hydration Inhibitors in fresh water-DRILPLEX

Summary of Progress/DeviationsSummary of Progress/Deviations TKPP, EMI-733 and KLA-CURE show the most promise as shale

hydration inhibitors. GLYDRIL range of glycols promote foaming, and are ineffective

in fresh water fluids. Increasing the DRILPLEX concentration does not improve

chemical shale inhibition. Potassium salts lead to an increase in fluid loss, and transient

flocculation of fresh water based fluids. Benefits of HIBTROL and other polymeric inhibitors are marginal Possible new material may invalidate some of this work

Next StepNext Step Compare performance of TKPP, EMI-733 and KLA-CURE using

Foss Eikeland clay. Accretion tests with TKPP, etc. Final recommendations after long term ageing tests (4 days). Proceed to Phase 2.

RD2003-030A - Drilplex

RD2003-030B Sildril

DescriptionDescription This project will define the density and temperature limits of the SILDRIL

system and seek to identify products, which can be used to enhance its performance at higher temperatures. Specific targets include 12 ppg Sildril stable to 360F and fluids stable at mud weights of 16-18 ppg

ApproachApproach

Compilation of prior field and laboratory data. HTHP density matrix testing of existing products to determine performance limits at different mud weights. Screening of HT products to seek to extend system perfprmance.

DeliverablesDeliverables Comprehensive report compiled from lab and field data defining the HT

performance limits of the Sildril system at defined mud weight. Formulations to meet the field requirements of 12 ppg at 360F and 16-18

ppg.

RD2003-030B – HT Sildril

2003-030B - MSP Gantt Chart

Resource: 9 months Time spent: 6 days 5% complete

ID Task Name Duration

1 Prepare project proposal 5 days

2 Project Proposal approval 1 day

3 Evaluation of conventional additives 60 days

4 Establish the green zone 20 days

5 Evaluation of HT additives 90 days

6 Establish yellow and green zones 20 days

7 Correlation of Lab and fiedl data 10 days

8 Final report with charts and recommendations 5 days

9 Report approval 2 days

14/04

Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May2nd Quarter 3rd Quarter 4th Quarter 1st Quarter 2nd Quarter

Temperature limit

70

90

110

130

150

170

190

1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9

Mud weight S.G.

Tem

pera

ture

(°C

)

Summary of Progress/DeviationsSummary of Progress/Deviations Project just getting going Technical Service work in Stavanger has already pushed

performance limits to 325F at 11ppg. This fluid successfully applied in an unspecified country

Project will clearly define where Sildril can and cannot be used. There is significant technical risk the field requirements will not

be met fully

Next StepNext Step Start lab work

RD2003-030B – HT Sildril

RD2003-030C Low Cost Ecotrol

RD2003-030C – Low Cost Ecotrol

DescriptionDescription To source a product that delivers comparable technical

performance at a minimum 20% improvement in cost over Ecotrol.

Additional aims are to obtain improved mud make-up in cold, low shear conditions and improved HTHP performance.

ApproachApproach Market survey: Web search and existing manufacturer

contacts Mud tests in “Zero FL” and HTHP OBMs Concentration profiles to assess cost effectiveness.

DeliverablesDeliverables Report and recommendation on alternative products (Q3)

Resource: 0.55 man year Time spent: 1 month 25% complete

RD2003-030C – MSP Gantt Chart

RD2003-030C – Low Cost Ecotrol

HighlightsHighlights

1111..55 ppppgg VVeerrssaacclleeaann MMuudd TTeesstt RReessuullttss

* 35 ppb Hymod Prima contamination ** trace water

Product Product conc. (ppb)

PV/YP @ 49 C

BHR AHR ESV AHR

HTHP@121C

(ml)

Base - 19/14 19/15 664 4.0 DP9-8460 DP204-9593 Alcomer 274

5.0 3.75 2.5 5.0 * 9.0 5.0

20/17 24/23 20/15 22/21 20/14 22/20 25/25 38/37 16/16 17/15 26/30 31/38

921 789 810 751 726 782

0.8 1.8 2.2 2.8

2.8** 2.8

Baystal T7730

4.0 6.0

18/19 19/21 18/17 21/18

808 739

2.8 2.4

Exp D110-02C 2.0 23/22 21/25 787 2.0 EMI 603 2.0

3.0 17/17 20/15 19/14 20/13

769 694

2.2 2.6

Ecotrol

2.0 2.0*

22/19 25/25 28/29 36/36

883 838

1.2 3.8

Summary of Progress/DeviationsSummary of Progress/Deviations 7 Candidate Materials identified and tested so far

benchmarked against Ecotrol Screened in 11.5 ppg and 16.5 ppg Versaclean fluids Appear at this stage to have a 10% cost advantage in 11.5

ppg Versaclean

Next StepNext Step Continue product screen Take on the best materials for testing in HTHP fluids

RD2003-030C – Low Cost Ecotrol

RD2003-030D Polymer Stabiliser

RD2003-030D – Polymer Stabiliser

DescriptionDescription To determine the efficiency of Gallic Acid as a

temperature stabiliser for mainstream polymers in various Candidate M-I fluid systems and to provide sufficient information for a patent memo

ApproachApproach Conduct screening tests and gather evidence of

product efficacy in generic mud systems bench marking against untreated fluids

Determine benefit or otherwise of different alkalinity sources in the test fluids

DeliverablesDeliverables Report on test findings and submit patent memo

by end Q2

Resource: 0.05 man year Time spent: 2 month 80% complete

RD2003-030D – MSP Gantt Chart

RD2003-030D – Polymer Stabiliser

Fluid Properties

Sample Variations

NaOH Buffered Base (BHR) 10.5 30 10 8 11 -

NaOH Buffered Base (AHR) 8.6 10 3 2 3 39.7

NaOH Buffered Base (AHR)

+ 1g gallic acid

NaOH Buffered Base (AHR)

+ 2g gallic acid

9.6

3rpm

4

39.1 16

10 sec. gel 30min. API

4

55

Fluid Properties Before and After Hot Rolling @ 300°F for 16 hrs

9.1

YPMud pH

58.9 18

6rpm

Base gives high FL and large drop in YP

Fluids containing GA have much lower fluid loss and less drop in YP

Highlight – typical synthetic polymer WB FluidBenefits seen in

Flopro

Glydril

HT synthetic polymer

HT PAC starch fluid

No benefits seen in

Sildril

Dipro

Summary of Progress/DeviationsSummary of Progress/Deviations Gallic Acid tested in HT formulations of Flopro, Dipro,

Sildril, Starch PAC, Glydril and HT synthetic polymer Gallic acid works well in monovalent salt systems NaOH neutralised salt gives very good results Optimum ratio of MgO:GA in a RDF enhances rheology Increases temperature tolerance of PAC and synthetic

polymer based FLA to in excess of 300°F Raises temperature limit of starch based FLA from 250°F

towards 300°F Work on ongoing in Houston and Stavanger Patent application underway Additional time used as original allocation not sufficient

Next StepNext Step Complete screening with Summer School Student report

and transfer technology

RD2003-030D – Polymer Stabiliser