As the confining pressure raises, the rise in resistance to longitudinal crack propagation leads to a gradual transition of shale failure mode from longitudinal to inclined shear failure that demonstrates an escalation in rock plasticity. When the confining force reaches 30 MPa, there are still nearby shear microcracks within https://troyspjcv.daneblogger.com/40368579/the-definitive-guide-to-wellbore-stability-issues