CO2 geologic storage, Leakage risk, Legacy wells
CO2 sequestration; Residual trapping; Dissolution trapping; Pore-scale simulation
CO2 sequestration; CO2 plume migration; Residual trapping; Analytical modeling; Pore-scale simulation
CCS, composite confining system, containment, seal, Geologic Carbon Storage, leakage risk, confining zone, migration-assisted trapping, storage security