Numerical Simulation of Artificial Fracture Propagation in Shale Gas Reservoirs Based on FPS-Cohesive Finite Element Method

Table 1

Basic model parameters.

Parameter	Value	Parameter	Value
Maximum in situ horizontal stress	36 MPa	Minimum in situ horizontal stress	26/31/36 MPa
Overburden stress	40 MPa	Initial pore pressure	24 MPa
Young’s modulus	10 GPa	Poisson’s ratio	0.24
Porosity	0.02	Permeability	0.06 mD
Tensile strength of the rock	2.5 MPa	Tensile strength of the natural fracture	2/1.7/1.5 MPa
Shear strength of the rock	2 MPa	Shear strength of the natural fracture	1.5/1.3/1 MPa
Normal energy release rate of the rock	28 N/mm	Normal energy release rate of the natural fracture	26/24/22 N/mm
Tangential energy release rate of the rock	28 N/mm	Tangential energy release rate of the natural fracture	26/24/22 N/mm
Filtration coefficient		Approaching angle	30°/45°/60°/75°
Injection rate	5 m^3/min·m	Viscosity	15 mPa•s