Valko - McCain bubble point pressure correlation

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Brief

Valco - McCain correlation is ...

Math & Physics

 P_{bp} = e^{2.498 + 0.713 z + 0.0075 z^2}

where:

 z1 = -4.814074834 + 0.7480913 log(R_{sb}) + 0.1743556 log^2(R_{sb}) - 0.0206 log^3(R_{sb})
 z2 = 1.27 - 0.0449  Y_{oil_API}+ 0.000436  Y^2_{oil_API}  - 0.00000476  Y^3_{oil_API}
 z3 = 4.51 - 10.84 \times SG_{g} + 8.39 \times SG^2_{g} - 2.34 \times SG^3_{g}
 z4 = -7.2254661 + 0.043155 \times T - 8.5548e-5 \times T^2 + 6.00696e-8 \times T^3
 z = z1 + z2 + z3 + z4

Discussion

Workflow

Application range

Nomenclature

 P = pressure, MPA
 P_{bp} = bubble point pressure, MPA
 R_s = oil gas ration, m3/m3
 SG_g = gas specific gravity, dimensionless
 T = temperature, °R
 Y_{oil_API} = oil API gravity, dimensionless

References

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