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Saturated oil formation volume factor


Bo
, p ≤ pb
bbl/stbp ≤ pb

LaTeX Math Inline
body--uriencoded--\displaystyle B_o(p, T) = 1 + a_1 \, R_s(p, T) + (T-60) \, \left( \frac%7B\gamma_%7BAPI%7D%7D%7B\gamma_g%7D \right) \, \big[ a_2 +a_3 \, R_s(p, T) \big]

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--\gamma_%7BAPI%7D \leq 30 \ %7B\rm API%7D

LaTeX Math Inline
body--uriencoded--\gamma_%7BAPI%7D > 30 \ %7B\rm API%7D

LaTeX Math Inline
bodya_1

4.677 · 10-44.670· 10-4

LaTeX Math Inline
bodya_2

1.751· 10-51.100· 10-5

LaTeX Math Inline
bodya_3

-1.811· 10-81.337· 10-9




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

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