Super critical CO2-methane relative permeability investigation

► This paper presents extensive laboratory results of unsteady state displacement of methane by super critical carbon dioxide SCO2 in consolidated reservoir core plugs. ► The effects of pressure, temperature, gas composition, injection-rate, and permeability heterogeneity on the recovery efficiency and gas multiphase flow at pore scale were investigated broadly. ► Results indicated that the recovery factor at CO2 breakthrough is a function of in situ gas composition, injection rate, and pore pressure. ► In contrast temperature, absolute permeability and core position factors only moderately affected the recovery factor.