Within this research, two conditions have already been used: the Mohr–Coulomb (M–C) criterion plus the multi-weak-airplane strength criterion for shale formations. These are generally accustomed to carry out analysis and reach the optimization of the failure criteria for shale–sandstone interbedded reservoirs. The PPW criterion improved reveals the toughness of https://brookskhzoe.blogscribble.com/42820371/wellbore-stability-in-drilling-secrets