SUMMARY
Hydraulic shearing stimulation is currently the most popular method for improving HDR permeability, which involves opening natural fracture networks and/or creating new fractures by low injection pressure. In EGS, the fracture network geometry, fracture length, fracture aperture, and fracture orientation, etc., are all unpredictable because of the complex deep environment. The authors consider hypothetically the surrounding rock outside the fractured reservoir as a nearly impermeable environment, so the working fluid loss of the rock beyond the boundaries of the fractured reservoir is n eglected5, 40, 41. The effects of fracture network morphology, fracture dip, fracture aperture . . .
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