Numerical Modeling of CO₂ and Brine Leakage through Open Fracture in a Fault Zone: Open Channel Flow or Darcy Flow

Table 1

Hydraulic parameters adopted in this study for all porous media.

Rock types	Porosity	Permeability (m^2)		Parameters for relative permeability (van Genuchten-Mualem model and Corey model)				Parameters for capillary pressure (van Genuchten model)					Note
				Residual gas saturation ()		Residual liquid saturation ()	Saturated liquid saturation ()	Residual liquid saturation		(Pa^−1)	Maximum capillary pressure (Pa)	Saturated liquid saturation
Reservoirs (Aquifer 1 to Aquifer 4)	0.25			0.05	0.46	0.3	1	0.25	0.46			1	Thermal conductivity and specific heat are 2.51 Wm^−1 K^−1 and 920 J/kg°C, respectively, keeping the same for all rocks.; is an empirical parameter of van Genuchten capillary function and relative permeability function, and denotes a critical inlet pressure for fluids.
Cap rocks, clays and aquitard	0.15			0.15		0.4		0.35
Damage zones of aquifers	0.3			0.05		0.25		0.2
Damage zones of aquitard	0.2			0.1		0.3		0.25