Because the confining tension boosts, the rise in resistance to longitudinal crack propagation leads to a gradual changeover of shale failure manner from longitudinal to inclined shear failure that displays an escalation in rock plasticity. When the confining stress reaches 30 MPa, there remain regional shear microcracks throughout the https://bookmarkforce.com/story21658366/rumored-buzz-on-shale-wellbore-stability