The Role of Coal Mechanical Characteristics on Reservoir Permeability Evolution and Its Effects on CO₂ Sequestration and Enhanced Coalbed Methane Recovery

Table 1

Parameters for basic geological model.

Parameter	Value	Remake	Parameter	Value	Remake
Dynamic viscosity of CH4 (, Pa s)		[52]	Thermal conductivity of coal (,W/(m·K))	0.1913	[42]
Dynamic viscosity of water (, Pa s)		[52]	Thermal conductivity of water (, W/(m K))	0.5985	[42]
Density of coal skeleton (, kg/m^3)	1400	—	Thermal conductivity of CH4 (,W/(m·K))	0.0301	[42]
Density of water at standard condition (, kg/m^3)	1000	—	Isosteric heat of CH4 adsorption (, kJ/Mol)	16.4	[42]
Thermal expansion coefficient of coal (, 1/K)		[52]	Thermal coefficients of gas adsorption (, 1/T)	0.021	[52]
Langmuir-type strain coefficient of CH4 ()	0.0128	[43]	Thermal coefficients of gas adsorption (,1/MPa)	0.071	[52]
Specific heat capacity of coal (, J/(kg·K)	1350	[43]	Reference temperature for adsorption test (, K)	300	[42]
Specific heat capacity of water (, J/(kg K)	4187	[42]	Adsorption time of CH4 (, d)	0.2	[42]
Specific heat capacity of CH4 (, J/(kg·K)	2220	[42]	Initial water saturation ()	0.85	—
Residual gas saturation ()	0.05	[42]	Irreducible water saturation ()	0.4	[42]
Capillary pressure (, MPa)	0.035	[42]	Initial reservoir temperature (, K)	303.5	—