2 lambdas
PO.PVT.Co.UnSat.ByVasquezBeggs.SI
Calculates undersaturated oil compressibility using Vasquez and Beggs (1980) correlation, [1/kPa] (SI units).
PO.PVT.Co.Sat.ByVillenaLanzi.SI
Calculates saturated oil compressibility using Villena-Lanzi (1985) correlation, [1/kPa] (SI units).
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