INTERNATIONAL STANDARDS AND RECOMMENDED ...

INTERNATIONAL STANDARDS AND RECOMMENDED PRACTICES FOR ASSURING STRUCTURAL RELIABILITY ON OCTG PRODUCTS

F. Daguerre, M. Merliahmad, M. Tivelli Technical Assistance - South East Asia

Introduction Conceptual Vision Well Challenges

Failure – Lack of Structural Reliability

Well Design (Load cases – Environment …)

Exploration Drilling (Associated services)

Casing + Cementing

Completion Production etc

DMF 4th Petroleum Forum

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Introduction Conceptual Vision Well Challenges Well Design

Corrosion& Cracking Resistance

(Load cases – Environment …)

Casing + Cementing

Co nd M Pe a i rfo ter tion s rm ial an ce

9Fluid dynamics

or ki ng

(Associated services)

9Thermal profile W

Exploration Drilling

9Interaction fluids & Mechanical Properties

materials

s on iti nd Co g kin Life ncy or a W ct pe ex

9Multiaxial Loads

Product Performance

Structural Performance

Dimensions

Working Conditions Completion Production etc


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Introduction From needs to requirements Well Challenges Well Design

Casing + Cementing


•NACE MR0175 /ISO15156

•API 5C3 / ISO 10400

or ki ng


•API 5CT/ISO 11960

•API 5C5 / ISO13679 •Proprietary specs.

Mechanical Properties




W


Product Performance


Dimensions



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Introduction From needs to requirements Well Challenges Well Design

Casing + Cementing



•API 5C3 / ISO 10400

or ki ng



•API 5C5 / ISO13679 •Proprietary specs.





W


Product Performance


Dimensions



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Material Performance Material Properties



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•API 5CT/ISO 11960 Ys Range [ksi]

40 45 50 55 60 65

Group I

H40

70

75

80

85

90

95

100 105 110 115 120 125 130 135 140 145 150

Max HRC

J55 - K 55 N80 Type1 & N80Q Group II

22

M65

23

L80

25,4

C90 C95 T95 Group III

P110

Group IV


25,4

Q125

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W

or ki ng

Co nd M Pe a i t rfo er tion s rm ial an ce



s on iti nd Co g kin fe ncy i L or a W ct pe ex

6.2 Heat Treatment 7.1 Chemical Composition 7.10. Hardenability 7.11 Grain size

Product Performance


Dimensions

Working Conditions


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Material Performance


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Material Performance


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W

or ki ng





6.2 Heat Treatment 7.1 Chemical Composition 7.10. Hardenability 7.11 Grain size

Product Performance


Dimensions

Working Conditions

7.2 Tensile properties 7.3-7.-6 Charpy V-notch test 7.8 Hardness variation 7.14 Sulfide stress cracking DMF 4th Petroleum Forum

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Material Performance Sulfide Stress Cracking Resistance

•NACE MR0175 /ISO15156-2


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Material Performance Sulfide Stress Cracking Resistance


or ki ng W Mechanical Properties




Product Performance


Dimensions

Working Conditions

9In environments containing H2S, hydrogen embrittlement, Sulfide Stress Cracking could suddenly occur DMF 4th Petroleum Forum

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Material Performance Sulfide Stress Cracking Resistance Factors interacting in the performance of steels 1. Chemical composition, method of manufacture, product form, strength, hardness of the material and its local variations, amount of cold work, heat-treatment condition, microstructure, microstructural uniformity, grain size and cleanliness of the material; 2.

H2S Partial pressure in gas or equivalent concentration in water phase.

3. Acidity (in situ pH) of the water phase. 4. Chloride ion concentration in the water phase 5. Presence of sulfur or other oxidants 6. Exposure to non-production fluids 7. Exposure to temperature 8. Total tensile stress: applied stress plus residual stress. 9. Exposure time. DMF 4th Petroleum Forum

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Material Performance Sulfide Stress Cracking Resistance H2S pp > 0,3Kpa (0,05psi)


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•API 5CT/ISO 11960 Risk Concern ?

•Supplementary

Requirements

•Product specification

Level

Improve Structural Reliability

•Mechanical Properties •Statistical testing •NDT acceptance criteria •Inspection Frequencies

9SR12. Statistical analysis of impact testing 9SR16. Impact testing (Charpy V-notch) for pipe 9H.2.2 Grade N80Q, PSL-3 (6.2.2). Only N80Q shall be furnished for PSL-3. 9H.4. PSL2 C90, T95, Q125. Chemical composition shall be Type 1. 9H.5 Yield strength - Q125, PSL-3. The maximum yield strength shall be 140 ksi 9H.6.1. PSL2. Charpy, minimum 75% shear area. 9H.7. PSL2 L80 Type 1: Hardenability 90%. PSL3 C90 & T95: 95% 9H.9 Sulfide stress-cracking - PSL-3. Method A testing with a load of 90% SMYS. DMF 4th Petroleum Forum

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Material Performance Structural Performance





Product Performance


Dimensions

Working Conditions


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•API 5C3 / ISO 10400





Product Performance


Dimensions

Working Conditions


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•API 5C3 / ISO 10400 9Classical approach, deterministic, smooth body continuous mechanics 9Statistical approach, realizing the variability of product parameters depending no actual process control capabilities 9Influence of imperfections and material fracture toughness in the product rupture.


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•API 5C3 / ISO 10400 ¾ 6 Triaxial yield of pipe body ¾ 7 Ductile rupture of the pipe body ¾ 8 External pressure resistance ¾ 9 Joint strength ¾ Annex B (inf.) Discussion of equations for ductile rupture ¾ Annex D (inf.) Discussion of equations for fracture ¾ Annex F (inf.) Development of probabilistic collapse performance properties ¾ Annex G (inf.) Calculation of design collapse strength from collapse test data ¾ Annex K (inf.) Tables of calculated performance properties in SI units


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•API 5C3 / ISO 10400 ¾ 6 Triaxial yield of pipe body Internal Yield

+

Internal Pressure

_ Ys

Ys

Compression

+

Tension

External Yield

_

External Pressure 23 May 2011


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•API 5C3 / ISO 10400 ¾ Annex F (inf.) Development of probabilistic collapse performance properties


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•API 5C3 / ISO 10400 ¾ 7 Ductile rupture of the pipe body ¾ Annex B (inf.) Discussion of equations for ductile rupture ¾ Annex D (inf.) Discussion of equations for fracture 9Final failure must consider the imperfection acceptance levels 9Annexes K and L: Burst for P110 at 12,5 % and at a 5 % NDT inspection level. 9Supplementary requirements, like SR2, or PLS 2 /3 in API 5CT – ISO 11960 for a higher structural reliability becomes evident. 9Rupture could be ductile or fragile, with different mechanisms and quite different load levels. 9H2S will affect the actual toughness and then special formulas are to be considered. Several work is ongoing in this regards. DMF 4th Petroleum Forum

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•API 5C5 / ISO 13679





Product Performance


Dimensions

Working Conditions


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•API 5C5 / ISO 13679 For API connections, round and buttress, the main characteristics are covered in API TR 5C3 / ISO TR 10400 and tabulated in Annexes K and L. The type of conditions in which they are used and their limitations to “low pressure, no critical services” are widely recognized. API 5C5 / ISO 13679, that establishes minimum design verification testing procedures and acceptance criteria for casing and tubing premium connections


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•API 5C5 / ISO 13679 It categorizes test severity into four test classes. 9Cal I, for liquid service, testing at room temperature without external pressure and bending optional. 9Cal II adds thermal cycling with a cumulative exposure of 5 h to gas at 135 °C. 9Cal III, for gas and liquid service, includes external pressure in the cycling testing. 9Cal IV, for most severe application includes bending, and thermal/pressure-tension cycling with cumulative exposure of about 50 h to gas at 180 °C.


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Validation Tests GALLING RESISTANCE

ISO 13679 – Galling Evaluation & Seal capacity under combined loads Specimen preparation

Specimen 1

Specimen 2

Specimen 3

Thread-seal interference

H-L

L-L

H-H

Thread taper

PSBF

PSBF

NOM-NOM

PFBS

MU (A)

MU (A)

MU (A)

7.2.2

7.2.2

7.2.2

H/L

H/H

H/H

RRG (B) 7.2.4 L/H

Make and

Specimen 4

Specimen 5

Specimen 6

Specimen 7

H-L

L-H

L-H

PSBF

PSBF

PFBS

PFBS

MU (A)

MU (A)

MU (A)

MU (A)

MU (A)

7.2.2

7.2.2

7.2.2

7.2.2

7.2.2

H/H

H/L

H/H

H/L

H/L

RRG (B)

RRG (B)

RRG (B)

7.2.4

7.2.4

7.2.4

L/H

L/H

L/H

L-H H-L 8 SPECIMENS

Specimen 8

break properties

Amount thread compound/torque shown in each block

MBG (B)

MBG (B)

MBG (B)

MBG (B)

7.2.3

7.2.3

7.2.3

7.2.3

L/H

L/H

L/H

L/H

FMU (B)

FMU (B)

FMU (B)

FMU (B)

FMU (B)

FMU (B)

FMU (B)

7.2.5

7.2.5

7.2.5

7.2.5

7.2.5

7.2.5

7.2.5

7.2.5

H/L

H/H

H/H

H/H

H/L

H/H

H/L

H/L

Bake

Bake

Bake

Bake

Bake

Bake

Bake

Bake

Bake

CAL II, III, IV

7.3.2

7.3.2

7.3.2

7.3.2

7.3.2

7.3.2

7.3.2

7.3.2

T/C pi/po

T/C pi/po

T/C pi/po

T/C pi/po

7.3.3

7.3.3

7.3.3

7.3.3

COMBINED LOADS

FMU (B)

Series A

Series B

T/C pi w B

T/C pi w B

T/C pi w B

7.3.4

7.3.4

7.3.4

7.3.4

Thermal Cycle 7.3.5

Thermal Cycle 7.3.5

Thermal Cycle 7.3.5

Thermal Cycle 7.3.5

Failure test pih+T to F

Failure test C+po to F

Failure test

CAL

Failure test po+C to F

Failure test T+pi to F

IV & III

7.5.1

7.5.2

7.5.3

Path No.

P1

P2

P3

P4

P5

Series C

Structural tests

th

T/C pi w B

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FAILURE TESTS7.5.5 7.5.4

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Failure test pi+C to F

Failure test po to F

Failure test pil+T to F

7.5.6

7.5.7

7.5.8

P6

P7

P8

28


•API 5C5 / ISO 13679 20.0

Load Points Collapse Pressure

15.0

95% VMES

Pressure [ksi]

100% VMES (Y ield)

-3,000

10.0 5.0 0.0 -2,000

-1,000

0

1,000

2,000

3,000

-5.0 -10.0 -15.0 -20.0

Test Failure

Axial Load [kips]


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Conclusions From needs to requirements

W

Co nd M Pe a i rfo ter tion i s rm al an ce

or ki ng

9The application of these documents requires a sound engineer judgment for each application.

9Some cases are not considered in these Mechanical documents, and as stated in API 5CT / ISO Properties 11960 introduction:


9International Standards and Recommended Practice assure the structural reliability.


Product Performance


Dimensions

Working Conditions

“Users of this International Standard should be aware that further or differing requirements may be needed for individual applications”. DMF 4th Petroleum Forum

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Lessons Learned & Best Practices : Chevron Thailand Shore Base Project

Sansana Malaiarisoon Assistant Manager - Corporate Responsibility Chevron Thailand Exploration and Production, Ltd. 4th Petroleum Forum May 27, 2011

© 2010 Chevron

May 2011

Outline

I.

Project Rationale and Description

II.

Stakeholder Engagement Framework vs Chevron Project Development and Execution Process (CPDEP) & Environmental, Social and Health Impact Assessment (ESHIA)

III. Best Practices and lesson Learned

© 2010 Chevron

Potential Impacts on Local Fishery

Complimentary Initiatives

Public Scoping (PP1) vs Public Review Sessions (PP2)

2

I.

Project Rationale and Description

Project Rationale

Offshore platforms of Chevron Thailand are located in the Gulf of Thailand

Offshore platforms are serviced by two shore bases: Songkla and Sattahip , Chonburi provinces

Capacity of both bases are insufficient

Possibilities to expand are limited

We will see increased activity in the near future

© 2010 Chevron

3

I.

Project Rationale and Description (cont’d)

Project Area: 395 rai ( 64 acres) • Land Part: Warehouse • Marine Part: Trestle and Jetty for berthing

© 2010 Chevron

4

II. Stakeholder Engagement Framework Vs CPDEP

Chevron’s Vision : “to be the energy company most admired for its people, partnership and performance” Chevron’s OEMS Vision : “to be recognized and admired by industry and local communities for its world-class performance on safety, health, the environment, reliability and efficiency”

Degree of Support Change

Chevron Project Development and Execution Process (CPDEP) Phase 1 :

Phase 2 :

Phase 3 :

Phase 4 :

Phase 5 :

Opportunity

Develop Alternatives

Develop Preferred Alternative

Execute

Operate and Evaluate

Acceptance / EIA submission

Commitment / EIA/HIA and Permit approval

Understanding Monitoring and Evaluation

Awareness

2008

2010

Continual Improvement

2013

Stakeholder Engagement & Participation Environmental, Social & Health Impact Assessment (ESHIA) © 2010 Chevron

5

III. Best Practices & Lesson Learned: Stakeholder Engagement Strategy The Case of CTSB (January 2008 - April 2011) No. of Visits

People Engaged with

27

440

Public Hearing Meetings

5

2,258

Attitude Survey

1

467

In Depth Interview

1

7

1,147

18,655

86

2,706

6

213

368

> 10,000

11

343

Focus Group Meeting Regulatory Requirement (EIA)

Within 5 km Radius

Regular Visits Stakeholder Engagement

Focus Group Meeting s(Informal) Open House Trips

Beyond 5 km Radius

© 2010 Chevron

Regular Visits Open House Trips

6

III. Best Practices & Lesson Learned: Stakeholder Engagement Strategy (cont’d) Vision: “To improve the lives of people wherever we work” and to be “neighbor of choice”

Committed to company’s vision & the Chevron Way

Sincere & Respectful to community opinions

Transparent & easily accessible

© 2010 Chevron

Strategy Lessons Lessons Learned Learned & & Share Share Information Information with with Project Project Team Team

Principles

Stakeholder Engagement Plan (Identification & Prioritization) Early engagement prior to commencement of project

Outcomes Community Participation from inception of the project Community needs/concerns & suggestions revealed and listened to

Regular and continual visits

Community participation in design of project & mitigation measures

Focus groups & community outreach activities

Community has correct understanding of the project & Chevron

Monthly community meetings & regular engagement via tea shop visits

Community participation in construction of quality of life development plan

Seek community’s advice & give correct project information

Community participation in M&E of Chevron’s performance in response to EIA commitment

Open House Trips Public relations and dissemination of information via community board, local radio and print publications

Better quality of life and well-being for local community Community accepts Chevron as a good neighbor

7

III. Best Practices & Lesson Learned: Potential Impact on Local Fishery April 2008: Eight focus group meetings with different groups of stakeholders to present the design and seek their feedback Key Concern: Obstruction of breakwater on fishing and sailing routes & Obstruction of public beach

© 2010 Chevron

8

III. Best Practices & Lesson Learned: Potential Impact on Local Fishery (cont’d) Solution: Revision of the Marine Part design from a breakwater sheltered harbor to an extended jetty with wave wall.

© 2010 Chevron

9

III. Best Practices & Lesson Learned: Potential Impact on Local Fishery (cont’d)

Impacts were significant since the majority of local community are fishermen

Impacts have been mitigated

Community concerns were incorporated in our assessment and planning

ESHIA is not only a checklist, but strictly enforced

Gains “TRUST” from local community

With the new design, fishing boats can go under the jetty, alleviating any obstruction and the public beach is no longer obstructed

© 2010 Chevron

10

III. Best Practices & Lesson Learned: Complimentary Initiatives - Fisheries Working Committee Objectives • To oversee the well-being of fisheries who will be directly affected by the CTSB project Members 222 members from 4 villages Roles and Responsibilities • Set framework and criteria for compensation to fisheries • Monitor Chevron’s performance on CTSB in response to EIA commitment • Develop fishery community development plan Current Status • 6 meetings organized • Developing alternative occupation plan for fishery groups • Serve as a representative on Bi-party Committee

© 2010 Chevron

11

III. Best Practices & Lesson Learned: Complimentary Initiatives - Community Advisory Committee Objectives • To monitor Chevron’s performance on CTSB in response to our commitment to EIA Members 24 members from all sectors: • Community leaders and local experts • Academics, health, local administrations, fisheries, agriculture and local occupational community • Committee’s consultant (from community) Roles and Responsibilities • Monitor CTSB’s performance in response to EIA commitment • Safeguard benefits for local community • To serve as a focal point that echoes community’s concerns and complaints Current Status • 8 meetings organized • Recruiting local community as committee consultants • We want to transform committee from bi-party to tri-party © 2010 Chevron

12

III. Best Practices & Lesson Learned: Complimentary Initiatives - CTSB CSR Plan The plan is categorized into seven categories: 1. Education, Culture and Youth Development

2. Community & Quality of Life Development Plan 3. Community Cooperative Plan

4. Biodiversity Action Plan

5. Health & Safety Promotion Plan 6. Local Community and Public Participation 7. Fishery Development Plan

This plan covers the construction period, up until commencement of operation

© 2010 Chevron

13

III. Best Practices & Lesson Learned: Public Scoping Meeting (PP1) vs. Public Review Meeting (PP2) Key Success Factors

No. of participants

(1,600 PAX)

1.

Intensive Stakeholder Engagement • Early, regular & continuous engagement with key stakeholders • Various focus groups meetings (Govt, community & medias) • Songkhla Open House Trips • Early engagement with Fishery Group • Establishment of working committee with local community • Economic benefits & costs study • CSR project as social mitigation measures

© 2010 Chevron

14

III. Best Practices & Lesson Learned: Public Scoping Meeting (PP1) vs. Public Review Meeting (PP2) (cont’d)

Participants on August 5, 2010 (PP2)

Key Success Factors

2.

Strategic Preparation & Planning • Teashop dialog & consistent visit • Community meeting (i.e. village fund meeting, elderly group meeting and village health volunteer meeting) • Update information and dissemination via community boards

3.

CTSB Model & Animation • Clear picture for local people to see how they could live close to CTSB project and continue their livelihood.

4.

Good Collaboration & Teamwork • Project Team, HES, PGPA, External Consultants & Experts

© 2010 Chevron

15

© 2010 Chevron

16

New Life to Jasmine Field DMF 4th Petroleum Forum Bangkok 26th_27th May 2011

Val Kienast and Rattana W.

Presentation Outline

Why “New Life to Jasmine Field ” X

Production history (arrested the decline and improved reserves replacement)

X

2010-2011 Infill drilling program results

How X

Seismic and well integration for well placement , interpretation and reservoir mapping

X

Enhancing recovery through horizontal wells

X

Employing some newer technologies on the market to improve oil recovery

Conclusion & Acknowledgements

2

B5/27 Jasmine Field Location

Pattani Basin

Jasmine field

Jasmine and Ban Yen Highlights 2010-2011 To-date ... Production X

Produced 35 Millionth Barrel in March 2011

Slowed decline rate and maintained production Development Drilling X

11 Development Wells drilled in 2010 Delivering above expectation

X

11 Development Wells drilled in 2011 9 wells currently online, remaining waiting for tie-in or completion

X

Utilized all slots from all platforms

Reserves X

2P Reserves Replacement Ratio (RRR) of 0.9 for both years

B5/27 Oil &Water Production …

Wells / Online Year

2P 2P

1P

latf or

m

latf or

ms

latf or

ms

Increasing Well Complexity ... WPD

WPD

WPB

WPB

WPA

WPA

WPC

WPC

BYA

BYA

2010 infill well Existing well

2011 infill well Existing well

Infill Drilling EUR Delivery – 2010 Wells ...

10 Wells online and delivering above expectation. One dry well bold test of a similar stratigraphic trap as encountered by BYA-14 Red#. Future WO.

Infill Drilling EUR Delivery – 2011 Wells ...

9 Wells online (C-17,18,19,20,22,23,BYA-09,10 & 23)

Red#. Future WO.

1 wet (C-21) bold test of new fault block 1 gassy (C-23) BYA 24 is being evaluated and completed

Emerge data for Well Placement and Interpretation Emerge PHIE cube provide log-type image, top-base sand not peak-trough, easy to work and understand.

The faults are more visible in Emerge data

PHIE

C20

PSTM_FINAL_NO_WHITING

C20

Reservoir Maps Integrated Emerge Data PHIE Mean Window Extraction

660_1&2 penetration point

660_1&2 Net Sand Map overlaid by structural contours

660_1&2 penetration point

Strong correlation between seismic and net sand observed from existing wells Net Sand map is conditioned by seismic attribute

Reservoir Maps Integrated Emerge Data Structural Modeling

Reservoir Mapping

Net Gas (ft)

Net Oil (ft)

JAS D24 Pre and Post Drill Comparison Reservoir Map Overlaid by Structural contour

Reservoir Map Overlaid by Structural contour

D24

D24 D24ST

Existing penetration

Existing penetration

Expected : Thicker sand trend along NNW-SSE direction 36 ft of net reservoir is expected Actual proven

: Thicker sand trend along NNW-SSE direction is 31 ft f

t

i i f

d

Increasing Use of Horizontal Wells ... C23 TD @ 12934ftMD

WPA

C16

C22 TD @ 11077ftMD

TD @ 10343ftMD

Infill drilling

Three Long-reach horizontal / high angle wells Primary targets were 50 sands, post drill result opens up more opportunities, north of A platform

WPC

50 Reservoir Interval

140

HS Intra HS

50

Enhancing Recovery Through Horizontal Wells N

S

680

B15ST B20

660

640-2

Infill drilling

B15ST N

S

680 660

640-2

Increasing oil recovery of reservoirs with defined fluid contacts through horizontal wells

B20

Refined Reservoir Definition & Recovery Optimisation ... BYA09 BYA

BYA04

BYA-09

Infill drilling

Advanced mapping technique to better indentify prospect. Advanced well and reservoir management through use of ICDs in Horizontal Wells

BYA-04

D-17 D-16

D-14

Maximizing Recovery – Well Optimisation & Application of New Technologies … Periscope -To steer horizontal wells

C16 Periscope

Stethoscope - Pressure measurement while drilling

Tractor - Perforation on C-19 high deviated well and cased hole logging.

ICD - BYA-09 Integration of Static and Dynamic data to develop full field reservoir model

Seismic, Exploration, Appraisal Raw Data Hierarchical Rock Model

Property Model

UpUp-scaled Simulation Model

New Life to Jasmine Field Summary Taking a new look at seismic helped to target smaller reservoirs and better define the larger established reservoirs.

Applying good Development Geology and Reservoir Engineering techniques combined with some of the newer technology on the market arrested the decline and improved the reserve replacement ratios.

Next step is to apply the static and dynamic modelling for evaluation of the potential for IOR -- specifically utilizing produced water for water-flooding 050 reservoir.

Acknowledgements Val Kienast (Co-Author)

Manora Team leader

Piyatad Tabmanee

Jasmine PE

Theeranun Limniyakul

Jasmine PE

Carlos Rodriguez

Jasmine Senior PE

Fred Houtzager

Jasmine Team leader/Chief PE

Christopher Platt

Chief Petrophysicist

Jason McClure

Supervising Drilling Engineer

Chris Oglesby

Chief Geologist

David Carter

Chief Geophysicist

Mike Pine

VP Development

Ian Anderson

Senior VP Exploration

David Johnson

President 20

The End

5 Year Plan Presentation to DMF – April 2011

21

2. EMERGE Multi-Attribute Analysis The Objective of the EMERGE Program: EMERGE is a program that analyzes well log and seismic data. It finds a relationship between the log and seismic data at the well locations. It uses this relationship to “predict” or estimate a volume of the log property at all locations of the seismic volume.

The Data that EMERGE uses: A seismic volume (usually 3D). A series of wells which tie the volume. Each well contains “target” log, such as porosity, which is to be predicted. Each well also contains the information for converting from depth to time, usually in the form of a check-shot corrected sonic log. (Optional) One or more “external” attributes in the form of seismic 3D volumes. 22

2011 Jasmine C Drilling Results C23

C17

7 wells drilled 6 wells completed

C22

One dry well, tested new fault block C18

C20

Utilized all slots in C platform Primary targets were 50 sands, post drill result opens up more opportunities, north of A platform

Oil Producer

C21

C19 Well

Fault Block

Sands

Pre /Post Drill EUR (MSTB)

Initial Rate/Status

C-17

Del-6B

390/50

180/336

>650

C-18

Del-6C

50

250/156

Wait for flowline

C-19

Del-6D

HS

200/200

530

C-20

Del-6

245/200/HS/50

125/170

190

C-21

New Fault Block

216/0

P&A

HS/50(Gas/Wet)

C-22(H)

Jas A_CW

50

230/321

>600

C-23(H)

Jas A_East

50

275/To be evaluated

500

23

2011 Ban Yen A Drilling Results

4 wells drilled and completed

BYA09

Utilized all slots in platform

Production expected to be better than pre drill predictions

BYA24

BYA10

Well

Fault Block

Ban Yen

BYA23 Oil Producer

Sands

Pre /Post Drill EUR (MSTB)

Initial Rate/Status

BYA-9(H)

Main

250

300/300

1370 (ESP)

BYA-10

South

245/200/180/160

240/470

500 (ESP)

BYA-23

South/BY2D

460/50

330/316

620 (ESP)

BYA-24

Main

540/50

300/To be evaluated

Wait for completion