Influence of Gas Density on the Clay Wettability: Implication for CO2 Geo-Sequestration

Carbon dioxide capture and storage (CCS) is considered as the most promising technological method to decrease atmospheric Carbon dioxide (CO2) emissions. However, due to density difference between the injected CO2 and the formation brine, CO2 tends to move vertically upwards in the reservoir, which results in leakage risk. This vertical migration of CO2 can be prevented by four trapping mechanisms, i.e. structural/residual trapping, capillary...