Geological Sequestration of C

Carbon SequestrationCarbon Sequestrationin Sedimentary Basinsin Sedimentary Basins

Module VII: Weyburn, Module VII: Weyburn, Sask. Sask.

Maurice DusseaultDepartment of Earth Sciences

University of Waterloo

Geological Sequestration of C

Weyburn: COWeyburn: CO22 as EOR Agent 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, COWeyburn, CO22 Source, Source, Pipeline Pipeline 250 MMCF/d CO2:

- coal gasification 95 MMCF/d

contracted for Weyburn CO2 EOR project

7000 t/d in 2006 320 km pipeline CO2 purity 95%

CO2 @ 15 MPa

CO2 RF ~ 0.16

Total RF ~42-43%

ReginaRegina

EstevanEstevan

BismarckBismarck

North DakotaNorth Dakota

MontanaMontana

ManitobaManitoba

SaskatchewanSaskatchewan CanadaCanada

USAUSA

WeyburnWeyburn

BeulahBeulah

>50 BCF injected to date

30-36 cm pipeline

Geological Sequestration of C

Weyburn Geological Weyburn Geological DispositionDisposition

k ~ 10-15 mDΦ ~ 15-30% Dan Olsen, GEUS, 2007

Geological Sequestration of C

Weyburn Field HistoryWeyburn Field History

Dan Olsen, GEUS, 2007

Geological Sequestration of C

Injection Strategy at Injection Strategy at WeyburnWeyburn

Dan Olsen, Geus, 2007

Geological Sequestration of C

Time-Lapse Seismic Time-Lapse Seismic MonitoringMonitoring

Geological Sequestration of C

Time-Lapse SeismicTime-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…Simulation, Monitoring…

Geological Sequestration of C

COCO22 Storage at Weyburn Storage at Weyburn

Geological Sequestration of C

Modeling WeyburnModeling Weyburn

(courtesy Sask. Industry & Resources).

Geological Sequestration of C

COCO22 Compression and Compression and TransportTransport 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 COIssues in CO22 Compression Compression and Transport (Pipelines)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