As the confining strain increases, the increase in resistance to longitudinal crack propagation brings about a gradual transition of shale failure method from longitudinal to inclined shear failure that displays an escalation in rock plasticity. Once the confining pressure reaches thirty MPa, there are still neighborhood shear microcracks throughout https://well-control-operations58035.acidblog.net/72999104/not-known-factual-statements-about-wellbore-stability