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Bo(p)bbl/stb
Oil
formation volume factor,
isothermal compressibilitycopsi-1p > pb

LaTeX Math Inline
body--uriencoded--\displaystyle c_o(p, T) = \

exp X(p), \quad X(p) = с

frac%7BA%7D%7Bp%7D

LaTeX Math Inline
body--uriencoded--A = c_1 +

с

c_2 \,

\ln p

R_%7Bsb%7D +c_3 \,

\ln p_b

T + c_4 \, \

ln T

gamma_g + c_

5

4\,

\ln

\gamma_%7BAPI%7D

+ c_6 \,\ln Rsb

LaTeX Math Inline
body--uriencoded--c_1 =

−7.573,

-1,433·10%5e%7B-5%7D, \ c_2 =

− 1.45,

5·10%5e%7B-5%7D, \ c_3 =

− 0.383,

17.2·10%5e%7B-5%7D, \ c_4 =

1.402,

-1,180·10%5e%7B-5%7D, \ c_5 =

0.256 , c_6 = 0.449

12.61·10%5e%7B-5%7D

where

LaTeX Math Inline
bodyp

psiaFluid pressure

LaTeX Math Inline
bodyT

°FInitial formation temperature

LaTeX Math Inline
body--uriencoded--\gamma_%7BAPI%7D

APIOil API gravity

LaTeX Math Inline
body\gamma_o

fracOil specific gravity

LaTeX Math Inline
body\gamma_g

fracGas specific gravity

LaTeX Math Inline
body--uriencoded--R_%7Bsb%7D

scf/stbGas Solubility at Bubble point pressure

LaTeX Math Inline
bodyp_b

psia Bubble point pressure

See Also

...

Petroleum Industry / Upstream / Petroleum Engineering / Subsurface E&P Disciplines / Reservoir Engineering (RE) / PVT correlations / Oil correlations

[ Vasquez-Beggs (1980) oil correlations ]

References

...

Vasquez, M., and H.D. Beggs. "Correlations for Fluid Physical Property Prediction." J Pet Technol 32 (1980): 968–970, doi.org/10.2118/6719-PA