Gas Z Factor Functions
Brill-Beggs and Dranchuk-Abou-Kassem fits of the Standing-Katz chart.
2 functions
PO.PVT.Z.ByBrillBeggs(Ppr, Tpr)
Calculates gas compressibility factor (Z) using Brill and Beggs (1974) correlation, {1}.
PO.PVT.Z.ByDAK(Ppr, Tpr)
Calculates gas compressibility factor (Z) using Dranchuk and Abou-Kassem (1975) equation of state, {1}.