Material Balance Equation Functions
47 functions
PO.MBE.Aq.Fet.J
Calculates aquifer productivity index for radial flow (Fetkovich), [bbl/day/psi].
PO.MBE.Aq.Fet.JLin
Calculates aquifer productivity index for linear flow (Fetkovich), [bbl/day/psi].
PO.MBE.Aq.Fet.Pa
Calculates average aquifer pressure (Fetkovich), [psi].
PO.MBE.Aq.Fet.Rate
Calculates water influx rate (Fetkovich), [bbl/day].
PO.MBE.Aq.Fet.Wei
Calculates maximum encroachable water (Fetkovich), [bbl].
PO.MBE.Aq.Fet.Wi
Calculates initial water volume in aquifer (radial), [bbl].
PO.MBE.Aq.Pot.Vol
Calculates aquifer pore volume for pot aquifer model, [bbl].
PO.MBE.Aq.Pot.We
Calculates instantaneous water influx for pot aquifer, [bbl].
PO.MBE.Aq.Sch.Rate
Calculates instantaneous water influx rate (Schilthuis), [bbl/day].
PO.MBE.Aq.Sch.We
Calculates cumulative water influx (Schilthuis) using trapezoidal integration, [bbl].
PO.MBE.Aq.VEH.reD
Calculates dimensionless radius for VEH aquifer, [dimensionless].
PO.MBE.Aq.VEH.tD
Calculates dimensionless time for VEH aquifer, [dimensionless].
PO.MBE.Aq.VEH.U
Calculates aquifer constant for VEH model, [bbl/psi].
PO.MBE.Aq.VEH.WdFin
Calculates dimensionless influx for finite aquifer (VEH), [dimensionless].
PO.MBE.Aq.VEH.WdInf
Calculates dimensionless influx for infinite aquifer (VEH), [dimensionless].
PO.MBE.Ce.Gas
Calculates effective compressibility for gas reservoir, [1/psi].
PO.MBE.Ce.Geopressured
Calculates effective compressibility for geopressured reservoir with gas solubility, [1/psi].
PO.MBE.Ce.PoreVol
Calculates pore volume compressibility term, [1/psi].
PO.MBE.Ce.Total
Calculates total system compressibility, [1/psi].
PO.MBE.Ce.UnSat.Oil
Calculates effective compressibility for undersaturated oil reservoir, [1/psi].
PO.MBE.Drives.All
Calculates all drive indices.
PO.MBE.Drives.CDI
Calculates Compressibility Drive Index (CDI), [fraction 0-1].
PO.MBE.Drives.DDI
Calculates Depletion Drive Index (DDI), [fraction 0-1].
PO.MBE.Drives.GDI
Calculates Gas Cap Drive Index (GDI), [fraction 0-1].
PO.MBE.Drives.WDI
Calculates Water Drive Index (WDI), [fraction 0-1].
PO.MBE.Exp.Bt
Calculates two-phase formation volume factor (Bt), [RB/STB].
PO.MBE.Exp.Efw
Calculates formation/water expansion term (Efw), [RB/STB].
PO.MBE.Exp.Eg
Calculates gas cap expansion term (Eg) for oil reservoirs, [RB/STB].
PO.MBE.Exp.Eg.Gas
Calculates gas expansion for pure gas reservoirs, [RB/scf].
PO.MBE.Exp.Eo
Calculates oil and dissolved gas expansion term (Eo), [RB/STB].
PO.MBE.Exp.Et
Calculates total expansion term (Et), [RB/STB].
PO.MBE.F.Gas
Calculates underground withdrawal for gas reservoir, [RB].
PO.MBE.F.Oil
Calculates underground withdrawal for oil reservoir, [RB].
PO.MBE.Gas.ModOGIP
Estimates OGIP using modified p/z for geopressured reservoirs, [scf].
PO.MBE.Gas.ModPz
Calculates modified p/z for geopressured reservoirs, [psi].
PO.MBE.Gas.OGIP
Estimates OGIP using standard p/z method, [scf].
PO.MBE.Gas.PredGp
Predicts cumulative production at given reservoir pressure, [scf].
PO.MBE.Gas.PredP
Predicts reservoir pressure at given cumulative production, [psi].
PO.MBE.Gas.Pz
Calculates p/z ratio for gas material balance analysis, [psi].
PO.MBE.Gas.RF
Calculates recovery factor for a gas reservoir, [fraction 0-1].
PO.MBE.Gas.URF
Calculates ultimate recovery factor based on abandonment pressure, [fraction 0-1].
PO.MBE.Oil.NandM
Estimates N and m from F/Eo vs Eg/Eo regression.
PO.MBE.Oil.OOIP
Estimates OOIP from F vs Et (no water influx), [STB].
PO.MBE.Oil.OOIP.Reg
Estimates OOIP using regression on F vs Et data, [STB].
PO.MBE.Oil.OOIP.We
Estimates OOIP with water influx, [STB].
PO.MBE.Oil.Residual
Calculates normalized MBE residual for quality check, [fraction].
PO.MBE.Oil.We
Infers water influx from material balance given known OOIP, [RB].