During this research, two requirements happen to be employed: the Mohr–Coulomb (M–C) criterion as well as multi-weak-airplane toughness criterion for shale formations. These are definitely utilized to perform analysis and realize the optimization of the failure conditions for shale–sandstone interbedded reservoirs. As illustrated in Determine 9, if the rock’s https://vertechs21.wixsite.com/vertechs21/post/innovations-in-mpd-drilling-revolutionizing-well-control