Investigation of the Law of Natural Gas Phase Behavior during the Migration and Reservoir Formation

Table 2

The polynomial models of CH₄ solubility in H₂O (, mol/kg).

Region	Boundary condition		Fitting model	Coefficient (with 95% confidence bounds)	Goodness of fit ()
	(K)	(MPa)
A	313.15~473.15				0.9461
B	313.15~473.15				0.9992
C	313.15~473.15				0.9997