Numerical Analysis of Multiple Factors Affecting Hydraulic Fracturing in Heterogeneous Reservoirs Using a Coupled Hydraulic-Mechanical-Damage Model

Table 1

Mechanical parameters of different layers.

Parameter	Symbol	Unit	Oil layer	Barrier layers
Macroscopic elastic modulus		GPa	33	28
Uniaxial compressive strength		MPa	72	93
Homogeneity index		—	4	4
Compression-tension ratio	—	—	10	10
Friction angle		°	30	35
Poisson ratio		1	0.21	0.23
Permeability		m^2
Porosity		%	12.1	0.1
Storativity	Ss	m^-1
Residual strength coefficient		—	0.1	0.1
Ultimate tensile strain coefficient		—	5	5
Ultimate compressive strain coefficient		—	200	200