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CO2 Sequestration Potential in the Lotsberg Salt_ Alberta _2_

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CO2 Sequestration Potential in the Lotsberg Salt_ Alberta _2_ Powered By Docstoc
					               Carbon Sequestration
              in Sedimentary Basins

       Module VII: Weyburn, Sask.
                    Maurice Dusseault
               Department of Earth Sciences
                  University of Waterloo

Geological Sequestration of C
   Weyburn: CO2 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 CO2 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 CO2 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#
Geological Sequestration of C
  Weyburn, CO2 Source, Pipeline
     250 MMCF/d CO2:                      Regina
      - coal gasification
                                     Weyburn                     Manitoba
     95 MMCF/d
      contracted for            Saskatchewan        Estevan
      Weyburn CO2 EOR
      project                   Montana

     7000 t/d in 2006                                        North Dakota

     320 km pipeline                                         30-36 cm
     CO2 purity 95%                                           pipeline
     CO2 @ 15 MPa                                                Bismarck
     CO2 RF ~ 0.16                                     Beulah
     Total RF ~42-43%
                                >50 BCF injected to date
Geological Sequestration of C
   Weyburn Geological Disposition




        k ~ 10-15 mD
        Φ ~ 15-30% Dan Olsen, GEUS, 2007
Geological Sequestration of C
   Weyburn Field History




Geological Sequestration of C   Dan Olsen, GEUS, 2007
   Injection Strategy at Weyburn




Geological Sequestration of C   Dan Olsen, Geus, 2007
   Time-Lapse Seismic Monitoring




Geological Sequestration of C
   Time-Lapse Seismic
      Take a survey at time t1
      Take another survey at time t2
      The difference in seismic velocities,
       reflection coefficients, and attenuation
       can be attributed to changes in CO2
       distribution, thickness, SCO2…
      This is a “snapshot” method used also in
       Sleipner, Permian Basin, etc.
      Also, Δ(gravity, EM, resistivity, …)
Geological Sequestration of C
   Simulation, Monitoring…




Geological Sequestration of C
   CO2 Storage at Weyburn




Geological Sequestration of C
   Modeling Weyburn




Geological Sequestration of C   (courtesy Sask. Industry & Resources).
   CO2 Compression and Transport
      Compression requires energy…
      Also, generated heat must be dissipated
      Is there an optimum p, T for CO2
       transport by pipeline?
      Are there other options?
      What about the steel in pipelines for
       higher p CO2 transport?



Geological Sequestration of C
   Issues in CO2 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
          H2O + CO2 form solids at certain p & T




Geological Sequestration of C

				
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