Vertical Pseudosteady-State Flow Functions
Pseudosteady-state rate by Darcy, Vogel, Fetkovich and Klins-Majcher, with time to stabilization.
8 functions
PO.IPR.VW.PSS.Rate(J, P_average, Pwf)
Calculates pseudosteady state production flow rate, [bbl/D].
PO.IPR.VW.PSS.Rate.ByVogel(J, P_average, Pwf, Pb)
Calculates Vogel inflow performance for pseudosteady state flow, [bbl/D].
PO.IPR.VW.PSS.Rate.ByFetkovich(C, n, Pres, Pwf)
Calculates Fetkovich backpressure IPR flow rate for oil, [STB/d]. Fetkovich (1973) correlation.
PO.IPR.VW.PSS.AOF.ByFetkovich(C, n, Pres)
Calculates Fetkovich maximum flow rate (AOF) at Pwf = 0, [STB/d]. Fetkovich (1973) correlation.
PO.IPR.VW.PSS.Rate.ByKlins(QoMax, Pres, Pb, Pwf)
Calculates Klins-Clark modified Vogel IPR flow rate for oil, [STB/d]. Klins & Clark (1993) correlation.
PO.IPR.VW.Klins.d(Pres, Pb)
Calculates Klins-Clark pressure-dependent exponent d, [dimensionless]. Klins & Clark (1993) correlation.
PO.IPR.VW.PSS.Time(Re, K, Ul, porosity, Ct)
Calculates time to reach pseudosteady state for oil well with regular-shaped drainage area, [h].
PO.IPR.VW.PSS.PI(K, h, Bl, Ul, Re, Rw, S)
Calculates pseudosteady state productivity index for vertical well, [bbl/(D.psi)].