Material Balance Equation LAMBDAs
29 lambdas
PO.MBE.Aq.Fet.J.SI
Calculates aquifer productivity index for radial flow (Fetkovich), [m3/d/kPa] (SI units).
PO.MBE.Aq.Fet.JLin.SI
Calculates aquifer productivity index for linear flow (Fetkovich), [m3/d/kPa] (SI units).
PO.MBE.Aq.Fet.Pa.SI
Calculates average aquifer pressure (Fetkovich), [kPa]. pa = pi * (1 - We/Wei) (SI units).
PO.MBE.Aq.Fet.Rate.SI
Calculates water influx rate (Fetkovich), [m3/d]. qw = J * (pa - pr) (SI units).
PO.MBE.Aq.Fet.Wei.SI
Calculates maximum encroachable water (Fetkovich), [m3]. Wei = ct * Wi * pi (SI units).
PO.MBE.Aq.Fet.Wi.SI
Calculates initial water volume in aquifer (radial), [m3] (SI units).
PO.MBE.Aq.Pot.Vol.SI
Calculates aquifer pore volume for pot aquifer model, [m3] (SI units).
PO.MBE.Aq.Pot.We.SI
Calculates instantaneous water influx for pot aquifer, [m3]. We = ct * Wi * deltaP (SI units).
PO.MBE.Aq.Sch.Rate.SI
Calculates instantaneous water influx rate (Schilthuis), [m3/d]. qw = C * (pi - p) (SI units).
PO.MBE.Aq.Sch.We.SI
Calculates cumulative water influx (Schilthuis) using trapezoidal integration, [m3]. We = C x integral(pi - p)dt (SI units).
PO.MBE.Aq.VEH.reD.SI
Calculates dimensionless radius for VEH aquifer, [dimensionless]. reD = ra / rr (SI units).
PO.MBE.Aq.VEH.tD.SI
Calculates dimensionless time for VEH aquifer, [dimensionless]. tD = 0.00634*k*t / (phi*muw*ct*rr^2) (SI units).
PO.MBE.Aq.VEH.U.SI
Calculates aquifer constant for VEH model, [m3/kPa]. U = 1.119 * phi * ct * h * rr^2 * (theta/360) (SI units).
PO.MBE.Ce.Gas.SI
Calculates effective compressibility for gas reservoir, [1/kPa] (SI units).
PO.MBE.Ce.Geopressured.SI
Calculates effective compressibility for geopressured reservoir with gas solubility, [1/kPa] (SI units).
PO.MBE.Ce.PoreVol.SI
Calculates pore volume compressibility term, [1/kPa]. cpv = (cw*Swc + cf) / (1 - Swc) (SI units).
PO.MBE.Ce.Total.SI
Calculates total system compressibility, [1/kPa]. ct = Sg*cg + Sw*cw + cf (SI units).
PO.MBE.Ce.UnSat.Oil.SI
Calculates effective compressibility for undersaturated oil reservoir, [1/kPa] (SI units).
PO.MBE.Exp.Bt.SI
Calculates two-phase formation volume factor (Bt), [rm3/sm3]. Bt = Bo + (Rsi-Rs)*Bg (SI units).
PO.MBE.Exp.Efw.SI
Calculates formation/water expansion term (Efw), [rm3/sm3]. Accounts for rock compaction and connate water expansion (SI units).
PO.MBE.Exp.Eo.SI
Calculates oil and dissolved gas expansion term (Eo), [rm3/sm3]. Eo = (Bo-Boi) + (Rsi-Rs)*Bg (SI units).
PO.MBE.F.Oil.SI
Calculates underground withdrawal for oil reservoir, [m3]. F = Np*(Bo + (Rp-Rs)*Bg) + Wp*Bw (SI units).
PO.MBE.Gas.ModOGIP.SI
Estimates OGIP using modified p/z for geopressured reservoirs, [sm3] (SI units).
PO.MBE.Gas.ModPz.SI
Calculates modified p/z for geopressured reservoirs, [kPa]. Accounts for formation/water compressibility (SI units).
PO.MBE.Gas.OGIP.SI
Estimates OGIP using standard p/z method, [sm3]. Assumes volumetric depletion (SI units).
PO.MBE.Gas.PredGp.SI
Predicts cumulative production at given reservoir pressure, [sm3] (SI units).
PO.MBE.Gas.PredP.SI
Predicts reservoir pressure at given cumulative production, [kPa] (SI units).
PO.MBE.Gas.Pz.SI
Calculates p/z ratio for gas material balance analysis, [kPa] (SI units).
PO.MBE.Gas.URF.SI
Calculates ultimate recovery factor based on abandonment pressure, [fraction 0-1] (SI units).