In this research, two requirements are used: the Mohr–Coulomb (M–C) criterion and the multi-weak-aircraft energy criterion for shale formations. These are used to conduct study and accomplish the optimization on the failure standards for shale–sandstone interbedded reservoirs. As illustrated in Figure 9, when the rock’s elastic mechanical parameters approximate https://readreview90121.wikiannouncement.com/10958880/wellbore_stability_in_drilling_an_overview