pb | psia | \displaystyle p_b(T) = \left[ \frac{R_{sb}}{c_1 \, \gamma_g \, \exp \left[ \frac{c_3 \, \gamma_{API}}{T+459.67} \right ]} \right]^{1/c_2} \gamma_{API} \leq 30 \ {\rm API} : \quad c_1 = 0.0362, \, c_2 = 1.0937, \ c_3 = 25.7240 \gamma_{API} > 30 \ {\rm API} : \quad c_1 = 0.0178, \, c_2 = 1.1870, \ c_3 = 23.9310 |
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where
p | psia | Fluid pressure |
T | °F | Initial formation temperature |
\gamma_{API} | °API | Oil API gravity |
\gamma_o | frac | Oil specific gravity |
\gamma_g | frac | Gas specific gravity |
R_{sb} | scf/stb | Maximum Gas Solubility |
See Also
Petroleum Industry / Upstream / Petroleum Engineering / Subsurface E&P Disciplines / Reservoir Engineering (RE) / PVT correlations / Oil correlations
[ Vasquez-Beggs (1980) oil correlations ]