Shallow hydrogeological and hydrochemical characterization of the Aquistore CO2 sequestration site in Estevan, Saskatchewan, Canada

摘要

Aquistore is a carbon sequestration project with the purpose of post-combustion capture of CO2 from a coal-fired electrical generating station in Estevan, Saskatchewan, Canada. A measuring, monitoring, and verification (MMV) program was designed to ensure conformance of injected CO2 and to minimize risks associated with potential leakage via early detection methods. One component of the MMV program was the characterization of shallow hydrogeology as part of a monitoring strategy to trace the migration of CO2 injected into deep brine formations at the Aquistore site. In order to establish the hydrogeological properties of the site, physical and chemical data were collected from a network of existing and newly-installed groundwater monitoring wells. Results were generally found to be consistent over time, with little seasonal variation in pressure measurements and chemical parameters.