Oil formation volume factor, B_o (p)	bbl/stb	$\begin{array}{l}\displaystyle c_o(p) = \frac{X}{p \cdot 10^5}, \quad X = с_1 + с_2 \, R_{sb} + c_3 \, T + c_4 \, \gamma_g + c_5 \, \gamma_{API}\end{array}$ $\begin{array}{l}c_1 = −1.433 \ , \ c_2 = 5 \ , \ c_3 = 17.2 \ , \ c_4 = -1.18 \ , \ c_5 = 12.61\end{array}$

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
$\begin{array}{l}R_{sb}\end{array}$	scf/stb	Gas Solubility at Bubble point pressure

Page tree

See Also