Physical and structural changes in shale associated with supercritical CO2 exposure

The shale-ScCO2 reaction and its effect on shale structure are among the key issues that significantly affect the CO2 sequestration process and shale gas recovery. To address this problem, the physical and structural changes in shale after 30 days of ScCO2 exposure (T = 40 °C, P = 16 MPa) were studied. The characterization techniques such as scanning electron microscopy (SEM), X-ray diffraction (XRD) analysis, low-pressure nitrogen adsorption,...