Experimental study of the effects of sub- and super-critical CO 2 saturation on the mechanical characteristics of organic-rich shales

The interaction between carbon dioxide (CO2) and shale during the process of CO2 sequestration and shale gas recovery could significantly affect mechanical properties of the shale. In the current study, we performed experiments at 38 °C on shale samples from the Sichuan Basin aiming at investigating the effects of sub-critical CO2 (SubCO2) and super-critical CO2 (ScCO2) saturation on shale mechanics. Uniaxial compressive strength (UCS) test,...