Earth’s crustal stress can be inferred from fluid flow of fractures in deep boreholes
by KeAi Communications Co.
Binary classification of fractures in the studied boreholes: a shear and effective normal stresses resolved on the hydraulically non-conductive (gray) and conductive (red) fractures. The prediction accuracy of the logistic regression is shown for each class. b Probabilistic density distributions of the slip tendency Ts of hydraulically non-conductive (gray) and conductive (red) fractures. The…