The collapse force and fracture strain for shale–sandstone had been computed across varying elastic modulus and Poisson’s ratios to find out the Harmless density window. The PPW criterion much better reveals the toughness of shale with different bedding angles. During this review, the JPW and PPW standards are made https://wellcontrolequipment67429.review-blogger.com/63335652/wellbore-stability-issues-an-overview