As the confining force raises, the rise in resistance to longitudinal crack propagation brings about a gradual transition of shale failure method from longitudinal to inclined shear failure that reflects an escalation in rock plasticity. Once the confining tension reaches 30 MPa, there remain neighborhood shear microcracks around the https://drillingfluid11975.empirewiki.com/10003496/not_known_factual_statements_about_wellbore_stability