Farshad correlation

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Brief

Math & Physics

A1 = 0.1982
A2 = 0.6685
A3 = –0.21435
A4 = 1.0116
A5 = 0.1616
A6 = –5.4531
A7 = –5.03 * 1e-4
A8 = 3.5 * 1e-8

 C_o = 10^{A6 + A7 \times X - A8 \times X^2}[1]

where:

  X = R^{A1}_s \times T^{A2} \times SG^{A3}_g \times Y^{A4}_{oil_API} \times P^{A5}

Discussion

Application range

Nomenclature

 A_1..A_{8} = coefficients
 P = pressure, psia
 R_s = oil gas ration, m3/m3
 SG_g = gas specific gravity, dimensionless
 T = temperature, °R
 Y_{oil_API} = oil API gravity, dimensionless

References

  1. Frashad, F.; LeBlanc, J.L.; Garber, J.D. (1996). "Empirical PVT Correlations For Colombian Crude Oils"Free registration required. SPE Latin America/Caribbean Petroleum Engineering Conference, 23-26 April, Port-of-Spain, Trinidad. Society of Petroleum Engineers (SPE-36105-MS).