Given that the confining force boosts, the increase in resistance to longitudinal crack propagation brings about a gradual transition of shale failure mode from longitudinal to inclined shear failure that demonstrates an escalation in rock plasticity. Once the confining stress reaches 30 MPa, there are still area shear microcracks https://try-here02445.gigswiki.com/6512405/what_does_shale_wellbore_stability_mean