Because the confining force will increase, the rise in resistance to longitudinal crack propagation leads to a gradual changeover of shale failure method from longitudinal to inclined shear failure that demonstrates an escalation in rock plasticity. When the confining strain reaches thirty MPa, there are still regional shear microcracks https://ourbigdirectory.com/listings13597767/5-easy-facts-about-shale-wellbore-stability-described