Displacement and mass transfer between saturated and unsaturated CO2-brine systems in sandstone

► Displacement processes of mutually saturated and unsaturated fluid phases. ► CO2-brine relative permeability in Berea Sandstone. ► Comparison of CO2-brine data to data obtained by special core analysis (SCAL) on the same rock type. ► Mass transfer between CO2 and brine during displacement of unsaturated fluid phases. Influence of heterogeneity and wettability on the displacement process.