The Story of Weyburn:

The Weyburn-Midale Project

Presented by

Zewei Yu, SaskPower

on behalf of

Dr. Malcolm Wilson

Petroleum Technology Research Centre (PTRC)

and

Dr. Frank Mourits

Natural Resources Canada (NRCan)

28 July 2011

International Carbon Capture and Storage Conference

Beijing, People’s Republic of China

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About the Weyburn-Midale Project

A collaboration of two separate projects:

The IEAGHG Weyburn-Midale CO2 Monitoring and

Storage Project – the world’s largest, in-the-field

research project examining the long-term storage of

CO2 in a depleting oil field

The research project is located on the site of the

commercial enhanced oil recovery (EOR) operations

of Cenovus at Weyburn and Apache at Midale –

together the largest CO2 injection project in the world

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ALBERTA

MANITOBA

MONTANA

WYOMINGSOUTH DAKOTA

NORTH DAKOTA

EDMONTON

SASKATOON

WINNIPEG

REGINA

HELENA

BISMARCK

PIERRE

CALGARY

WILLISTON BASIN

HUDSONBAY

SASKATCHEWAN

WEYBURN

ALBERTA

MANITOBA

MONTANA

WYOMINGSOUTH DAKOTA

NORTH DAKOTA

EDMONTON

SASKATOON

WINNIPEG

REGINA

HELENA

BISMARCK

PIERRE

CALGARY

WILLISTON BASIN

HUDSONBAY

SASKATCHEWAN

WEYBURN

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Cenovus Weyburn Unit Production

Weyburn Unit Oil Production

0

5,000

10,000

15,000

20,000

25,000

30,000

35,000

40,000

45,000

50,000

Jan-

55

Jan-

60

Jan-

65

Jan-

70

Jan-

75

Jan-

80

Jan-

85

Jan-

90

Jan-

95

Jan-

00

Jan-

05

Jan-

10

BO

PD

(g

ross)

Primary & Waterflood

Pre CO2

Hz Infills

Vertical Infills

CO2

EOR

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Weyburn and Midale Key CO2-EOR Operating Statistics

Weyburn (Cenovus)(July 2011)

Midale (Apache)(April 2011)

Start of CO2 injection / duration 2000 / 30 years 2005 / 30 years

Wellhead Injection pressure 10 - 11 MPa (1450 - 1600 psi)

Daily injection rate of fresh CO2

Recycle rate of CO2 & produced gas

Total daily CO2 injection rate

6,500 t/d (125 MMscf/d)

6,500 t/d (125 MMscf/d)

13,000 t/d (250 MMscf/d)

1,250 t/d (25 MMscf/d)

630 t/d (13 MMscf/d)

1,880 t/d (38 MMscf/d)

Annual amount of fresh CO2

injected

2.4 million tonnes 0.46 million tonnes

Total amount of fresh CO2 injected

to date

17.5 million tonnes 2.5 million tonnes

Incremental / total oil production 18,000 / 28,000 b/d 2,540 / 5,600 b/d

Projected total incremental oil

recovery due to CO2

155 million barrels 60 million barrels

(17% OOIP)

Lifecycle CO2 utilization factor 3 - 4 Mcf/b 2.3 Mcf/b

Projected amount of CO2 stored at

project completion

30+ million tonnes* (gross)

26+ million tonnes (net)

10+ million tonnes* (gross)

8.5+ million tonnes (net)

Total capital cost of EOR project Estimated CAD$1.3 billion Estimated CAD$400 million

* equivalent to removing 9 million cars from the road for one year

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0

10

20

30

40

50

60

2000 2005 2010 2015 2020 2025 2030 2035 2040 2045 2050 2055

CO

2S

tora

ge

(m

illio

n to

nn

es

)

Phase 1 IEA Projection

Latest Estimate

EOR OperationsInitial estimate: 23.2 Mt

EOR OperationsLatest Estimate > 30 Mt

Potential Post-EOR Storage Operations

(25 Mt)

~17.5 Million Tonnes Stored

to Date

Total CO2 Storage (Phase 1 estimate) ~55 Mt

Weyburn CO2 Storage Capacity

Historical and Projected

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CO2 Source: Great Plains Synfuel Plant

二氧化碳来源：大平原合成材料厂

Produces 13,000 tonnes/day (250 mmcf/d)

of CO2 as by-product of lignite gasification

- 8,000 t/d available for EOR

CO2 purity is 95% (less than 2% H2S)

- trace of mercaptans

DGC delivers CO2 to Weyburn-Midale

fields through 320-km pipeline (14 and 12

inch)

CO2 delivered in supercritical state at 2175

psi (15 MPa)

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IEAGHG Weyburn - Midale CO2 Monitoring and Storage Project

IEAGHG Weyburn - Midale 二氧化碳监控及储存项

Use site to examine long-term storage of CO2 in a depleting oil field

Develop & demonstrate technologies for the design, implementations, monitoring

and verification of CO2 geological storage

Deliver framework necessary to encourage and accelerate CO2 geological storage on a worldwide basis (Best Practices Manual)

Project Objectives

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Weyburn - Midale Final Phase Objectives

Weyburn - Midale 项目后期的主要目标

Technical Components

• Site Characterization

• Monitoring and Verification

• Wellbore Integrity

• Risk Management

Policy Components

• Regulatory Issues

• Public Communications and Outreach

Best Practices Manual

Transition of CO2-EOR

Operations to CO2-storage

Pre-injection, Operations,

Post-injection, Closure

Final Phase - Project Structure

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Final Phase: Partners

Over 25 Canadian, U.S. and European Research Organizations & Research Performers

6 Government Sponsors

• Natural Resources Canada

• United States Dept. of Energy

• IEA GHG R&D Programme

• Saskatchewan Energy and Resources

• Alberta Innovation and Science

• RITE (Research Institute of Innovative

Technology for the Earth)

• Alberta Innovates – Technology Solutions

• Canadian Light Source – Synchrotron

• ECOMatters (ECOM)

• Geological Survey of Canada

• Harm Maathuis Hydrogeology

• Permedia Group

• Saskatchewan Research Council

• Canada Capital Energy Corp

• Bluewave Resources

• Fugro Seismic Imaging

• Lawrence Livermore National Laboratories

• Opsens Engineering

• Ohio University

• Schlumberger

• U California Irvine

• University of Bristol, UK

• British Geological Survey

• International Energy Agency

(IEA) GHG R&D Programme

10 Industry Sponsors

• Nexen

• OMV Austria

• SaskPower.

• Schlumberger

• Shell

• Apache Canada

• Aramco Services Co

• Cenovus Energy

• Chevron

• Dakota Gasification

• T.L. Watson & Associates

• University of Saskatchewan

• University of Alberta

• University of Calgary

• Carleton University

• URS Canada Inc.

• Saskatchewan Geological

Survey

2007 - 2011

$41 Million(cash + in-kind)

Technical Manager

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Monitoring Techniques 监控技术4D Seismic 四维地震资料

Reprocessing

Discriminate pressure vs. saturation

Modelling & Inversion

Improve mapping of saturation/pore

pressure changes

Obtain detailed Rock Properties Data

Weyburn Specific Rock Physics

model

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Geochemical Monitoring Program

Fluid Geochemistry monitoring

• 16+ sampling trips; 40 to 60 wells; >40 parameters; >30,000 data

Soil gas monitoring

• Baseline and follow up surveys

Shallow HydrogeologicalMonitoring

• 11 surveys over 9 years

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Geochemical Modeling Program

Integration of Geochemical monitoring & Reservoir history matching

Reactive Transport modeling (with hydrocarbon EOS)

Experimental & modeling of CO2 -brine-rock interaction

Pore scale mineral alteration

2-phase fracture flow

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Well Integrity Program

Logging

Cement samples

Pressure Transient Tests

Mini-fracturing

Fluid sampling

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Conclusions

The geologic setting at Weyburn-Midale appears to be highly

suitable for long-term CO2 geological storage

4D-seismic monitoring proved effective to track CO2

movements, as did geochemical monitoring

Modeling indicates that:

98% of the injected CO2 will remain stored over thousands of

years

there will be no leakage through overlying formations into

biosphere or atmosphere

Project produced the most complete and comprehensive, peer-

reviewed data set on CO2 geological storage in the world

Best Practices Manual due in September 2011

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Thank You!