In this particular copyrightine, two conditions have already been used: the Mohr–Coulomb (M–C) criterion along with the multi-weak-aircraft strength criterion for shale formations. These are accustomed to perform analysis and realize the optimization in the failure criteria for shale–sandstone interbedded reservoirs. The PPW criterion improved reveals the toughness of https://vertechs21.wordpress.com/2026/01/08/revolutionizing-well-control-in-high-pressure-high-temperature-gas-drilling-environments/