Enhanced CBM Micro-pilot Test at South Quinshu Basin, China. Brent Lakeman Program Leader, Carbon Management Alberta Research Council Inc.

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1 Enhanced CBM Micro-pilot Test at South Quinshu Basin, China Brent Lakeman Program Leader, Carbon Management Alberta Research Council Inc.

2 Demonstration Site Location Shanxi Province Hebei Province Shijiazhuang Taiyuan Pilot Area Qinshui County Qinshui Basin Jincheng Changzhi Anyang Henan Province Zhengzhou

3 Objective Demonstrate that coal seams in this area are permeable and stable enough to absorb CO 2 and enhance methane production, leading to a clean energy source for China

4 Project Sponsors Canadian International Development Agency (CIDA) Canadian Climate Change Development Fund (CCCDF) (CA $ 5 million) Ministry of Commerce (MOFCOM) China United Coalbed Methane Corporation Ltd. (CUCBM) (CA $ 5 million) year CA $ 10 million Project (Started March 2002)

5 Project Participants CIDA Canadian Consortium: Alberta Research Council (ARC) Sproule International Ltd. Computer Modelling Group (CMG) SNC-Lavalin Inc. Computalog CalFrac Well Services Porteous Engineering China United Coalbed Methane Corporation Ltd. (CUCBM)

6 Micro-Pilot Test Goals Enhancement of CBM recovery can not be estimated directly from micro-pilot test data To measure and evaluate data to obtain estimates of reservoir properties and sorption behavior To calibrate a simulation model for estimation of the enhancement of CBM recovery in a larger-scale pilot or full field development

7 Major Tasks Selection, characterization and ranking of 3 pilot sites Design of micro-pilot field test procedures Single well micro-pilot field test at the most suitable site Perform up to three micro-pilot tests to show commercial potential

8 Major Tasks (Continued) Micro-pilot test evaluation and numerical model calibration and fine tuning Large-scale pilot design leading to commercial production (pending) Training and technology transfer between Canada and China (pending)

9 Attractiveness of Qinshui Basin No. 3 Seam Shanxi Formation Age: Carboniferous Permian coal Depth: 478 meters Average thickness: 6 meters Reservoir temperature & pressure: 25C & 500 psi Large areal extent Thick, laterally continuous coal seams Relatively shallow depths of coal seams Highest gas contents measured in China Reasonable access to local markets and pipelines Relatively more explored than other basins

10 Cooling Down the System

11 Injecting Liquid CO2

12 Micro Pilot Results CO2 Injection Pressure (KPa) CO 2 Soak Clogging & workover Post CO2 Production Start CO 2 Trucks Pressure Buildup 3-Apr 23-Apr 13-May 2-Jun 22-Jun 12-Jul 1-Aug 21-Aug Cumulative Time (days)

13 Design of 5-Spot Field Pilot Test Numerical Simulation Scenario Continue after history matching run (November 19, 2003) Start CO 2 injection at new injector at a constant rate of 22,653 m 3 /d (0.8 MMscf/d) Continuous production at all four wells

14 5-Spot Field Pilot Test Methane Production Rate Methane Production Rate (m3/day) Time 0 = March 16, 1998 After 6 months CO 2 Injection FZ-002 FZ-003 FZ-008 TL Start CO 2 Injection Time (yr) Thick Curves: CO 2 -ECBM Thin Curves: Primary CBM

15 5-Spot Field Pilot Test CO 2 Distribution in Coal Seam #3 FZ-008 TL-003 CO 2 Mol Fr. in Fracture FZ-002 FZ months 1 year 2 years 3 years 4 years 5 years

16 5-Spot Field Pilot Test CO 2 Inventory Time 0 = March 16, 1998 CO 2 Stored After 6 months CO 2 Injection Start CO 2 Injection ( years)

17 5-Spot Field Pilot Test Cumulative CBM Production 3.5E+07 Cumulative Methane Production (m3) 3.0E E E E E E+06 Primary CBM ECBM Incremental Production 0.0E Time (yr)

18 Next Steps Initial commercial economic evaluation Training and technology transfer in Canada and China continues

19 Conclusions Successful completion of micro-pilot test that met all technical objectives 192 metric tonnes of CO 2 was injected CO 2 soak for 30 days Injectivity decreased during injection but permeability rebounded after an extended production period of 1 month Production for 60 days measuring gas composition, pressures and flow rates History matching indicates a significant production enhancement compared to primary production Substantial CO 2 storage in the coal seam is feasible in a multi-well project

20 For More Information Brent Lakeman Program Leader, Carbon Management Alberta Research Council 250 Karl Clark Road Edmonton, Alberta, Canada Phone: (780) Fax: (780)