Saturated oil formation volume factor	B_o	bbl/stb	p ≤ p_b	$\begin{array}{l}\displaystyle B_o(p, T) = c_1 + c_2 \cdot \left[ R_s(p,T) \left( \frac{\gamma_g}{\gamma_o} \right)^{c_4} + c_3 \, T \right]^{c_5}\end{array}$ $\begin{array}{l}c_1 = 0.972 \ , \ c_2 = 1.47 \cdot 10^{-4} \ , \ c_3 = 1.25 \ , \ c_4 = 0.5 \ , \ c_5 = 1.175\end{array}$

where

Location		California
$\begin{array}{l}p\end{array}$	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

Page tree