During the oil field waterflooding process, bedding slip will happen if high pressure injection water cuts into the mudstone and shale interlayers, and regional casing impairment will be induced. The influence of seepage field on the stress field includes two aspects： on one hand, pore pressure is assumed as a body force and applied to the rock mass; on the other hand, the hydration of mudstone and shale is obvious, which will decrease rock mechanical properties. Based on the Mohr-Coulomb theory and effective stress principle, the sliding mech...
