ASSESSMENT OF THE LONG-TERM FATE OF CO_2 INJECTED INTO THE WEYBURN FIELD

摘要

CO_2 is being injected into a 1450m deep oil reservoir located in Weyburn, Saskatchewan, Canada, for enhanced oil recovery. To complement this commercial activity, a major research project to study geological sequestration and storage of CO_2, known as the International Energy Agency (IEA) Weyburn CO_2 Monitoring and Storage Project, was launched in July 2000. Phase 1 of this project was completed in 2004. This paper discusses the long-term assessment of the fate of CO_2 in the IEA Weyburn Project, describing the underlying methodology as well as the modeling approach and the results obtained. The conclusion from the modeling predictions is that if the Weyburn CO_2 storage system evolves as expected, long-term geological storage of greenhouse gas CO_2 will be achieved.