Within this review, two requirements happen to be used: the Mohr–Coulomb (M–C) criterion as well as multi-weak-airplane strength criterion for shale formations. These are utilized to perform study and achieve the optimization from the failure criteria for shale–sandstone interbedded reservoirs. Thickening agents with sand ended up added to the https://medium.com/@vertechs/revolutionizing-well-control-in-high-pressure-high-temperature-gas-drilling-environments-c212cb28aedd