Table 2. Input Parameters for Multicomponent Cases.

parameters	case 1	case 2	case 3	case 4
initial reservoir pressure, Pi (psi)	1200	1200	1200	1200
reservoir thickness, h (ft)	24	24	24	24
initial cleat porosity, φi	4.0%	4.0%	4.0%	0.5%
initial permeability, ki (millidarcy)	100	100	100	100
drainage area (acres)	80	80	80	80
number of components	3	7	7	7
initial mole fraction of components	CH4= 95.0%	CH4= 95.55%	CH4= 60.0%	CH4= 95.55%
	CO2 = 3.0%	CO2 = 2.04%	CO2 = 20.0%	CO2 = 2.04%
	N2 = 2.0%	N2 = 1.73%	N2 = 10.0%	N2 = 1.73%
		C2H6 = 0.64%	C2H6 = 2.5%	C2H6 = 0.64%
		C3H8 = 0.04%	C3H8 = 2.5%	C3H8 = 0.04%
		i-C4H10 = 0.04%	i-C4H10 = 2.5%	i-C4H10 = 0.04%
		n-C4H10 = 0.032%	n-C4H10 = 2.5%	n-C4H10 = 0.032%
Langmuir volume of components (scf/ton)	VLCH4 = 500	VLCH4 = 500	VLCH4 = 500	VLCH4 = 500
	VLCO2 = 900	VLCO2 = 900	VLCO2 = 900	VLCO2 = 900
	VLN2 = 400	VLN2 = 400	VLN2 = 400	VLN2 = 400
		VLC2H6 = 450	VLC2H6 = 450	VLC2H6 = 450
		VLC3H8 = 470	VLC3H8 = 470	VLC3H8 = 470
		VLi-C4H10 = 450	VLi-C4H10 = 450	VLi-C4H10 = 450
		VLn-C4H10 = 400	VLn-C4H10 = 400	VLn-C4H10 = 400
Langmuir pressure of components (psi)	PLCH4 = 400	PLCH4 = 400	PLCH4 = 400	PLCH4 = 400
	PLCO2 = 300	PLCO2 = 300	PLCO2 = 300	PLCO2 = 300
	PLN2 = 400	PLN2 = 400	PLN2 = 400	PLN2 = 400
		PLC2H6 = 300	PLC2H6 = 300	PLC2H6 = 300
		PLC3H8 = 300	PLC3H8= 300	PLC3H8 = 300
		PLi-C4H10 = 350	PLi-C4H10 = 350	PLi-C4H10 = 350
		PLn-C4H10 = 350	PLn-C4H10 = 350	PLn-C4H10 = 350
relative permeability curve (Corey’s model-based)	Swc = 0.2	Swc = 0.2	Swc = 0.2	Swc = 0.2
	Sgc = 0.01	Sgc = 0.01	Sgc = 0.01	Sgc = 0.01
	Krwe = 1.0	Krwe = 1.0	Krwe = 1.0	Krwe = 1.0
	Krge = 0.95	Krge = 0.95	Krge = 0.95	Krge = 0.95
	nw = 2.0	nw = 2.0	nw = 2.0	nw = 2.0
	ng = 2.0	ng = 2.0	ng = 2.0	ng = 2.0
desorption time, τ (days)	5	5	5	5
initial water saturation, Swi	1.0	1.0	1.0	1.0
coal saturation (%)	100%	100%	100%	100%
equivalent Langmuir sorption strain, εLeq	0.02	0.02	0.02	0.02
cleat compressibility, Cf (psi–1)	2.622 × 10–05	2.622 × 10–05	2.622 × 10–05	3.745 × 10–04
ratio of bulk to axial modulus, K/M	0.78	0.78	0.78	0.556
Young’s modulus, E (psi)	445000	445000	445000	445000
matrix shrinkage compressibility, Am (psi–1) (Am = Cfφi)	1.05 × 10–06	1.05 × 10–06	1.05 × 10–06	1.873 × 10–06
exponent, n	3	3	3	3
skin factor, S	0	0	0	0
reservoir temperature, T (°R)	530	530	530	530
radius of wellbore, rw (ft)	0.3	0.3	0.3	0.21
surface water rate operating constraint (bbl/day)	100	100	100	500
flowing bottom-hole pressure constraint (psi)	100	100	100	100