1. Geological Sequestration of C Carbon Sequestration in Sedimentary Basins Module VII: Weyburn, Sask. Maurice Dusseault Department of Earth Sciences University of Waterloo

2. Geological Sequestration of C Weyburn: CO 2 as EOR Agent  The Weyburn project started in 2000 and is located in an oil reservoir discovered in 1954 in Weyburn, Southeastern Saskatchewan, Canada. The CO 2 for this project is captured at the Great Plains Coal Gasification plant in Beulah, North Dakota which has produced methane from coal for more than 30 years. At Weyburn, the CO 2 will also be used for enhanced oil recovery with an injection rate of about 2 million tonnes per year. (Quote) http://www.engineerlive.com/european-process-engineer/17576/carbon-dioxide-capture.thtml#

3. Geological Sequestration of C Weyburn, CO 2 Source, Pipeline  250 MMCF/d CO 2 : - coal gasification  95 MMCF/d contracted for Weyburn CO 2 EOR project  7000 t/d in 2006  320 km pipeline  CO 2 purity 95%  CO 2 @ 15 MPa  CO 2 R F ~ 0.16  Total R F ~42-43% Regina Estevan Bismarck North Dakota Montana Manitoba Saskatchewan Canada USA Weyburn Beulah >50 BCF injected to date 30-36 cm pipeline

4. Geological Sequestration of C Weyburn Geological Disposition k ~ 10-15 mD Φ ~ 15-30% Dan Olsen, GEUS, 2007

5. Geological Sequestration of C Weyburn Field History Dan Olsen, GEUS, 2007

6. Geological Sequestration of C Injection Strategy at Weyburn Dan Olsen, Geus, 2007

7. Geological Sequestration of C Time-Lapse Seismic Monitoring

8. Geological Sequestration of C Time-Lapse Seismic  Take a survey at time t 1  Take another survey at time t 2  The difference in seismic velocities, reflection coefficients, and attenuation can be attributed to changes in CO 2 distribution, thickness, S CO2 …  This is a “snapshot” method used also in Sleipner, Permian Basin, etc.  Also, Δ(gravity, EM, resistivity, …)

9. Geological Sequestration of C Simulation, Monitoring…

10. Geological Sequestration of C CO 2 Storage at Weyburn

11. Geological Sequestration of C Modeling Weyburn (courtesy Sask. Industry & Resources).

12. Geological Sequestration of C CO 2 Compression and Transport  Compression requires energy…  Also, generated heat must be dissipated  Is there an optimum p, T for CO 2 transport by pipeline?  Are there other options?  What about the steel in pipelines for higher p CO 2 transport?

13. Geological Sequestration of C Issues in CO 2 Compression and Transport (Pipelines)  Compression requires energy  Heat of compression must be dissipated  Avoiding corrosion is necessary  Special grade of steel is required  Avoiding hydrate formation is necessary  H 2 O + CO 2 form solids at certain p & T