Quantification of oil recovery efficiency, CO 2 storage potential, and fluid-rock interactions by CWI in heterogeneous sandstone oil reservoirs

摘要

Significant interest exists in improving recovery from oil reservoirs while addressing concerns about increasing CO concentrations in the atmosphere. The combination of Enhanced Oil Recovery (EOR) and safe geologic storage of CO in oil reservoirs is appealing and can be achieved by carbonated (CO-enriched) water injection (CWI). So far, through several flooding experiments, the potential of carbonated water injection as an EOR scenario has been investigated. While several coreflood experiments on homogeneous cores have been performed, there is no information on the effectiveness of CWI for oil recovery and CO storage potential on heterogeneous cores. Since not all the oil reservoirs are homogenous, understanding the potential of CWI as an integrated EOR and COstorage scenario in heterogeneous oil reservoirs is essential.