Numerical Simulation and Optimization of Enhanced Oil Recovery by the In Situ Generated CO₂ Huff-n-Puff Process with Compound Surfactant

Table 6

Characteristic parameters of formation of nonaqueous fluid pseudo-components.

Components	Molecular weight	Critical pressure	Critical temperature	Critical volume	Acentric factor	Coefficient	Coefficient
	(g/mol)	(atm)	(K)	(m^3)	—	—	—
CO2	44.0100	72.800	304.20	0.0940	0.22500	0.457236	0.077796
N2 to C1	16.2863	43.083	189.23	0.0988	0.00865	0.457236	0.077796
C2 to C6	50.9499	29.588	394.60	0.2209	0.16607	0.457236	0.077796
C7 to C20	261.9422	14.612	783.38	0.7529	0.68937	0.457236	0.077796
to C32	401.6392	10.786	788.39	1.2247	0.97418	0.365791	0.077796