Saturated oil gas solubility	R_s	psia	p ≤ p_b	$\begin{array}{l}\displaystyle R_s(p, T) = \gamma_g \cdot \big[ \gamma_{API}^{0.989} \, p^_b \, T^{-0.172} \big]^{1.2255}, \quad p^_b = 10^X, \quad X = 2.8869 - (14.1811 - 3.3093 \, \lg p)^{0.5}\end{array}$

where

$\begin{array}{l}p\end{array}$	psia	Fluid pressure
$\begin{array}{l}T\end{array}$	°F	Initial formation temperature
$\begin{array}{l}\gamma_{API}\end{array}$	°API	Oil API gravity
$\begin{array}{l}\gamma_o\end{array}$	frac	Oil specific gravity
$\begin{array}{l}\gamma_g\end{array}$	frac	Gas specific gravity

References

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