For that reason, it is critical to choose proper toughness criteria to correctly describe the strength traits on the development rock. Provided that shale toughness reveals substantial variation with bedding inclination angle, the influence of toughness anisotropy about the Harmless density window ought to also be taken into account. https://vertechs21.wixsite.com/vertechs21/post/advancing-well-control-how-vertechs-is-shaping-the-future-of-safe-drilling