As being the confining tension raises, the increase in resistance to longitudinal crack propagation ends in a gradual transition of shale failure method from longitudinal to inclined shear failure that reflects an escalation in rock plasticity. When the confining pressure reaches 30 MPa, there remain neighborhood shear microcracks across https://wellcontroltechniques46654.wikidirective.com/8417075/not_known_details_about_rock_mechanics_in_wellbore_stability