Research Article

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).

RegionBoundary conditionFitting modelCoefficient (with 95% confidence bounds)Goodness of fit ()
(K) (MPa)

A313.15~473.15



0.9461
B313.15~473.15







0.9992
C313.15~473.15







0.9997