Diagenesis and sealing capacity of the middle Tuscaloosa mudstone at the Cranfield carbon dioxide injection site, Mississippi, U.S.A.

摘要

At Cranfield field, Mississippi, a monitored carbon dioxide (CO₂) sequestration and enhanced oil recovery project provides a unique opportunity to study sealing properties of a marine shale as a CO₂-confining zone. The reservoir is in the amalgamated fluvial basal sandstone of the lower Tuscaloosa Formation at depths of more than 3000 m (9843 ft). The marine mudstone of the middle Tuscaloosa forms a continuous regional confining system of approximately 75 m (246 ft).