CO2-water-shale interaction induced shale microstructural alteration

To better understand the CO2 enhanced shale gas recovery process, it is of great significance to investigate the CO2-water-shale interaction and its effect on the microstructural alteration in shale. To clarify the microstructural alteration of shale exposure to CO2-water at different CO2 pressures, X-ray diffraction analysis, low-pressure nitrogen gas adsorption (N2GA), nuclear magnetic resonance (NMR) and fractal analysis were carried on shale...