PO.PVT.Z.ByBrillBeggs(Ppr, Tpr)

Calculates gas compressibility factor (Z) using Brill and Beggs (1974) correlation, [dimensionless].

PO.PVT.Z.ByDAK(Ppr, Tpr)

Calculates gas compressibility factor (Z) using Dranchuk and Abou-Kassem (1975) equation of state, [dimensionless].

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