Outline of Presentation

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1 4 th Wellbore Integrity Network Meeting Monitoring i of Wellbore Performance at Penn West CO 2 -EOR Rick Chalaturnyk Geological Storage Research Group Department of Civil and Environmental Engineering University of Alberta 18th 19th March 2008 Hotel Concorde Montparnasse, Paris, France Outline of Presentation Penn West CO2-EOR Monitoring Project Integrated t Instrumentation t ti System in Observation Well Summary 1

2 Penn West CO2-EOR Monitoring Pilot Project A multi-year, multi-agency project for the monitoring of CO2 used for an enhanced oil recovery ypilot in central Alberta owned and operated by Penn West Energy Trust. The Alberta Energy Research Institute, Alberta Environment, Western Economic Diversification, Environment Canada, Natural Resources Canada and Penn West Energy Trust are partners in this three-year CO2 monitoring pilot project, the first of its kind in Alberta. Five organizations involved in research program Penn West Energy Trust Alberta Research Council Alberta Geological Survey University of Calgary University of Alberta Penn West CO2-EOR Pilot Location Penn West CO2-EOR Pilot P2 I1 100/7-11 well (the OBS Well) P1 102/7-11 well (the newly drilled production well) 2

3 Penn West CO2-EOR Monitoring Pilot Project The project will further advance the understanding of the fate of CO2 injected into petroleum reservoirs and enhance our understanding of the role that geological CO2 storage can play in responding to the risks of climate change. This project, which is utilizing leading-edge CO2 monitoring tools and applications, will add to the growing body of knowledge that is being developed in Canada on the capture and storage of carbon dioxide and its potential as a greenhouse gas mitigation option. Goals of Research Program Suitability of existing oil and gas pools for CO2-EOR and CO2 storage Cost effective monitoring programs for detecting and quantifying fate of CO2 Informing long-term (post-closure) monitoring programs Acquisition of experience in implementing monitoring technologies to assist in future development of regulatory framework Evaluation of verification and environmental monitoring methods for CO2 storage 3

4 Elements of the Intregrated Instrumentation System Overview of Instrumentation Well Design Wellbore Completion P/T Data Interpretation Observation Well, 6 Production Wells and 2 CO2 Injection Wells P2 I1 100/7-11 well (the OBS Well) P1 102/7-11 well (the newly drilled production well) 4

5 Geology and Design Completion 3 pairs of Ground Surface 0 Completion Configuration for Obs Well (100/ W5) 1100 All fluid sampling tubing, pressure/ geophone cables and 1120 gauge cables run to surface. From surface to 2 downhole Ardley Coal md filled with inhibited fluid (water). All Knee Hill Tuff instrumentation strapped temperature to 2 3/8 tubing string. 506 fluid 1180 Formation 8 phone sampling pressure 1200 Cement Top at gauges 1200 md Edmonton 1220 ports Fluid Sampling Port # at 1301 md. Port located within Annulus Geophone Sleipner CO pressure , HCO 3, CO 2-3- Upper Lea Park zones where porosity Saline Mayor is ~ 7% ions string 1300 Aquifer SUBSURFACE PRESSURE: Formation pressure Annulus pressure Lea Park Shale Geochemical Component WATER COMPOSITION: 1320 Groundwater aquifer CO2SP Trace elements Belly River Salinity pressure 1380 Time-lapse 3D seismic imaging: Cardium Zone Cardium Conglomerate Upper Cardium Sandstone Middle Cardium Sandstone Lower Cardium Sandstone Fluid Sampling Port #2 at 1622 md. Port located within Upper/Middle Cardium SST Two (2) pressure/temp. gauges at 1302 md. P P and S wave velocity 8 Geophone String. Bottom phone at 1640 md and phone spacing is 20 m. Reflection horizons Seismic amplitude attenuation Two (2) pressure/temp. gauges at 1621 md. Two (2) pressure/temp. gauges at 1610 md. In the middle of the Cardium Zone. Performance Monitoring of P P Cementing 1303 m Press Press Press m 1303 Temp2 T 1610 Temp1 T 1620 Temp1 Begin circulating prewash fluid Begin circulating cement Cement circulation finished Started Closing BOP Bags Bags Finished Closing Stopped pumping to maintain pressure Began bleeding off annulus pressure Pressure, kpa Temperature, C 45 ReservoirPressure Pumping to pressure up annulus started 2/26/05 10:00:00 2/26/05 12:00:00 2/26/05 14:00:00 2/26/05 16:00:00 2/26/05 18:00:00 Time (m/d/y h:m:s) 35 5

6 Wellbore Completion Feb 27 to Mar Instrument Cables P T 1611mkb All Gauges Survive Installati on And Working Tbi Tubing punch 1302 m 1610 m 1623 m Stabilization period P T 1302mkb Begin circulati on of brine to kill flow 6

7 Downhole Monitoring Technology Tubing C L Casing Cement Permanent installation system Formation Perforations Sample port Pressure and Temperature

8 Pressure and Temperature Pressures within Well Sheath Pressure (kpa) P 1302mkb P 1611mkb T 1302mkb T 1611mkb Temperature ( o C) Jan/1 Mar/1 May/1 Jul/1 Sep/1 Nov/1 Jan/1 Mar/1 Month (2007) 8

9 Obs. Well Pressures P2 I1 100/7-11 well (the OBS Well) Pressure, kpa P /7-11 well (the newly drilled production well) P-1302mkb P-1611mkb Inj10-11 P (kpa) WH (kpa) Jan/1 Mar/1 May/1 Jul/1 Sep/1 Nov/ Date/Time Wellhead (Surface) Press ure, kpa RESERV. Shallow Sensor May P mkb T-1302mkb Apr/30 May/5 May/10 May/15 May/20 May/25 May/30 Jun/4 Jun/9 Date/Time 9

10 Deep Sensor May P-1611mkb T1611 T-1611mkb Apr/30 May/5 May/10 May/15 May/20 May/25 May/30 Jun/4 Jun/9 Date/Time Early P/T Reading System Period of on Stability Injection Recovering production P T Injector Inj. test 10MP above Reservoir pressure T dropped due to CO2 front Stopped injection test (3 days) Temperature going back to steady-state condition Pressure Fall off, Open valve Reservoir Pressure

11 We re sticking my house down this hole!! 4 th Wellbore Integrity Network Meeting Monitoring i of Wellbore Performance at Penn West CO 2 -EOR Rick Chalaturnyk Geological Storage Research Group Department of Civil and Environmental Engineering University of Alberta 18th 19th March 2008 Hotel Concorde Montparnasse, Paris, France Acknowledgements Alberta Energy Research Institute Alberta Environment Western Economic Diversification Environment Canada Natural Resources Canada Penn West Energy Trust EnergyINet - CO 2 Management Program 11