A Two-Phase Flowback Model for Multiscale Diffusion and Flow in Fractured Shale Gas Reservoirs

Table 2

Simulation parameters for field data.

Parameter	Unit	Value	Physical meanings
		0.15	Residual saturation of gas
		0.2	Residual saturation of water
		2	Pore size distribution index
		2	Corey parameter for water
		2	Corey parameter for gas
	MPa	27.4	Initial reservoir pressure
	m	143	Fracture half-length
	MPa	19.67	Well pressure
	mD	0.0008	Initial permeability in fractured zone
		0.08	Initial porosity in fractured zone
	mD	0.1	Permeability in hydraulic fracture
		0.25	Porosity in hydraulic fracture
		0.03	Initial porosity in microfracture of matrix
		0.01	Initial porosity in matrix
		11	Number of hydraulic fractures
	MPa	2	Entry capillary pressure
		0.3	Poisson’s ratio of shale
	kg/m^3	2630	Shale density
	MPa	6	Langmuir pressure of gas in shale
	m^3/kg	0.03	Langmuir sorption capacity of shale for gas
	K	327.6	Reservoir temperature