Experimental and numerical study on supercritical CO2/brine transport in a fractured rock: Implications of mass transfer, capillary pressure and storage capacity

► Supercritical CO2/brine transport in a fractured core under storage conditions. ► We estimated injectivity and storage capacity in fractured and homogeneous core. ► X-ray images captured localized salt precipitation during CO2-flooding. ► Fracture aperture controls CO2 saturation within the fracture. ► Pressure gradient derived transient CO2 flux reversal in fracture-matrix system.