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Oil correlations based on Middle Eastern oil samples.

Bubble point pressurepbpsia

p_b = c_1 \, R_s^{c_2} \,\gamma_g^{c_3} \, \gamma_o^{c_4} \, T^{c_5}

c_1 = 5.38088 \cdot 10^{-3}, \ c_2 = 0.715082, \ c_3 = -1.877840 , \ c_4 = 3.1437, \ c_5 = 1.32657


Saturated gas solubility


Rsscf/stbp ≤ pb

\displaystyle R_s(p, T) = \left[ {c_1}^{-1} p \, \gamma_g^{-c_3} \, \gamma_o^{-c_4} \, T^{-c_5} \right]^{1/c_2}

c_1 = 5.38088 \cdot 10^{-3}, \ c_2 = 0.715082, \ c_3 = -1.877840 , \ c_4 = 3.1437, \ c_5 = 1.32657


Saturated oil formation volume factor

Bobbl/stbp ≤ pb

B_o(p, T) = c_1 + c_2 \, T + c_3 \, F + c_4 \, F^2, F =R_s^{c_5}(p, T) \, \gamma_g^{c_6} \, \gamma_o^{c_7}

c_1 =0.497069, \ c_2 = 0.862963 \cdot 10^{-3}, \ c_3 = 0.182594 \cdot 10^{-2} , \ c_4 = 0.318099 \cdot 10^{-5}

c_5 = 0.742390, \, c_6 = 0.323294, \, c_7 = -1.202040


where

LocationMiddle East

p

psiaFluid pressure

T

°FInitial formation temperature

\gamma_{API}

°APIOil API gravity

\gamma_o

fracOil specific gravity

\gamma_g

fracGas specific gravity

R_{sb}

scf/stb


See Also


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

References


Al-Marhoun, Muhammad Ali. "PVT Correlations for Middle East Crude Oils." J Pet Technol 40 (1988): 650–666. doi: https://doi.org/10.2118/13718-PA







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