Experimental investigation on the mechanical properties of a low-clay shale with different adsorption times in sub-/super-critical CO2

Knowledge of the effect of carbon dioxide (CO2) on the mechanical properties of low-clay shales is essential to shale gas production and CO2 sequestration. In this paper, a series of uniaxial compressive strength (UCS) variable-time experiments were performed on low-clay shale samples saturated in sub-/super-critical CO2. The crack propagation process and micro scale variations were recorded by acoustic emission (AE) sensors with 3D ARAMIS...