Physical Simulation Experiments of Hydraulic Fracture Initiation and Propagation under the Influence of Deep Shale Natural Fractures

Horizontal wells’ multi-section and multi-cluster hydraulic fracturing plays an important role in the efficient development of shale gas. However, influence perforating hole natural fracture dip angle on process initiation propagation has been ignored current researches. This paper presents results related to a tri-axial large-scale experiment under different parameters. We discuss experimental relating near-wellbore tortuosity fractures. Experimental showed that triaxial principal stress sample was deflected by fracture, which caused significant The fractures most rock samples were not perpendicular minimum horizontal after experiment. As well, deflection degree direction probability decreased with increase angle. After fractures’ tortuous propagation, will propagate controlled far-wellbore area. For reservoirs fractures, proppant should be added are fully expanded prevent sand plugging When permeability is low, volume fluid entering small, easy pass through