Application of nanoindentation technology for characterizing the mechanical properties of shale before and after supercritical CO2 fluid treatment

To better implement super critical carbon dioxide (SC-CO2) fracturing on shale, it is important to investigate effects of SC-CO2 on rock mechanical properties. Because micro-scale mechanical properties determine the overall mechanical response, the determination of micro-scale mechanical properties is necessary. In this paper, continuous stiffness measurement (CSM) and constant loading rate (CLR) mode nanoindentation was performed on shale...