In this research, two standards happen to be utilized: the Mohr–Coulomb (M–C) criterion and also the multi-weak-plane energy criterion for shale formations. These are typically accustomed to perform analysis and achieve the optimization with the failure conditions for shale–sandstone interbedded reservoirs. Lamellar shale oil reservoirs produce millimeter-to-centimeter-scale siltstone... https://vertechs1.blogspot.com/2026/02/mastering-depths-how-mpd-drilling-and.html