Influence of supercritical CO2-H2O-caprock interactions on the sealing capability of deep coal seam caprocks related to CO2 geological storage: A case study of the silty mudstone caprock of coal seam no. 3 in the Qinshui Basin, China

We conducted simulation experiments on supercritical carbon dioxide (ScCO2)-H2O-rock interactions for caprock samples obtained from the Qinshui Basin, China, to explore the influence of carbon dioxide (CO2) injection on the sealing capability of deep unminable coal seam caprocks as it relates to CO2 geological storage. This research focused on the changes in mineral composition, pore-fissure structure, permeability, and mechanical properties of...