Numerical Simulations of Fracture Propagation in Jointed Shale Reservoirs under CO₂ Fracturing

Table 1

Mechanical parameters for the simulations.

Mechanical parameters	Rock matrix	Joint	Unit
Elastic modulus	36	18	GPa
Poisson’s ratio	0.225	0.25	—
Rock density	2600	2600	kg/m^3
Compressive strength	62	31	MPa
Tensile strength	8.2	4.1	MPa
Initial rock permeability	10^-18		m^2
Initial rock porosity	0.01	0.015	—
Biot coefficient	0.2	0.3	—
Internal fraction angle	0.117	0.117	rad