Within this review, two conditions are employed: the Mohr–Coulomb (M–C) criterion and the multi-weak-aircraft toughness criterion for shale formations. They're utilized to perform analysis and realize the optimization on the failure requirements for shale–sandstone interbedded reservoirs. The PPW criterion much better reveals the toughness of shale with various bedding https://matters.town/a/pvxc9fzecwxh