Water Compressibility Functions
Osif undersaturated and McCain saturated water compressibility.
2 functions
PO.PVT.Cw.UnSat.ByOsif(P, T_degF, salinity_gl)
Calculates water compressibility for undersaturated conditions using Osif correlation, P >= Pb, [1/psi].
PO.PVT.Cw.Sat.ByMcCain(P, T_degF, salinity_gl, SG_gas)
Calculates water compressibility for saturated conditions using McCain correlation, P <= Pb, [1/psi].