Horizontal bedding architectures in shale lead to strong heterogeneity and anisotropy of reservoir formations. The 3D finite- element numerical model for fracturing in horizontal wells in shale has been established on the basis of isotropic features and numerical modeling of coupling of seepage and deformation. In the course,the sensibility of perforation azimuth,elastic mechanics anisotropy and geo- stress anisotropy to fracturing pressure of hydraulic fractures is tested. The results show that fracturing ...