Category
MBE
46 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]. pa = pi * (1 - We/Wei).
PO.MBE.Aq.Fet.Rate
Calculates water influx rate (Fetkovich), [bbl/day]. qw = J * (pa - pr).
PO.MBE.Aq.Fet.Wei
Calculates maximum encroachable water (Fetkovich), [bbl]. Wei = ct * Wi * pi.
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]. We = ct * Wi * deltaP.
PO.MBE.Aq.Sch.Rate
Calculates instantaneous water influx rate (Schilthuis), [bbl/day]. qw = C * (pi - p).
PO.MBE.Aq.VEH.reD
Calculates dimensionless radius for VEH aquifer, [dimensionless]. reD = ra / rr.
PO.MBE.Aq.VEH.tD
Calculates dimensionless time for VEH aquifer, [dimensionless]. tD = 0.00634*k*t / (phi*muw*ct*rr^2).
PO.MBE.Aq.VEH.U
Calculates aquifer constant for VEH model, [bbl/psi]. U = 1.119 * phi * ct * h * rr^2 * (theta/360).
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]. Uses Edwardson correlation.
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]. cpv = (cw*Swc + cf) / (1 - Swc).
PO.MBE.Ce.Total
Calculates total system compressibility, [1/psi]. ct = Sg*cg + Sw*cw + cf.
PO.MBE.Ce.UnSat.Oil
Calculates effective compressibility for undersaturated oil reservoir, [1/psi].
PO.MBE.Drives.All
Calculates all drive indices. Returns [DDI, GDI, WDI, CDI, Sum]. Sum should be ~1.
PO.MBE.Drives.CDI
Calculates Compressibility Drive Index (CDI), [fraction 0-1]. CDI = N*Efw / F.
PO.MBE.Drives.DDI
Calculates Depletion Drive Index (DDI), [fraction 0-1]. DDI = N*Eo / F.
PO.MBE.Drives.GDI
Calculates Gas Cap Drive Index (GDI), [fraction 0-1]. GDI = N*m*Eg / F.
PO.MBE.Drives.WDI
Calculates Water Drive Index (WDI), [fraction 0-1]. WDI = We / F.
PO.MBE.Exp.Bt
Calculates two-phase formation volume factor (Bt), [RB/STB]. Bt = Bo + (Rsi-Rs)*Bg.
PO.MBE.Exp.Efw
Calculates formation/water expansion term (Efw), [RB/STB]. Accounts for rock compaction and connate water expansion.
PO.MBE.Exp.Eg
Calculates gas cap expansion term (Eg) for oil reservoirs, [RB/STB]. Eg = Boi*(Bg/Bgi - 1).
PO.MBE.Exp.Eg.Gas
Calculates gas expansion for pure gas reservoirs, [RB/scf]. Eg = Bg - Bgi.
PO.MBE.Exp.Eo
Calculates oil and dissolved gas expansion term (Eo), [RB/STB]. Eo = (Bo-Boi) + (Rsi-Rs)*Bg.
PO.MBE.Exp.Et
Calculates total expansion term (Et), [RB/STB]. Et = Eo + m*Eg + Efw.
PO.MBE.F.Gas
Calculates underground withdrawal for gas reservoir, [RB]. F = Gp*Bg + Wp*Bw.
PO.MBE.F.Oil
Calculates underground withdrawal for oil reservoir, [RB]. F = Np*(Bo + (Rp-Rs)*Bg) + Wp*Bw.
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]. Accounts for formation/water compressibility.
PO.MBE.Gas.OGIP
Estimates OGIP using standard p/z method, [scf]. Assumes volumetric depletion.
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. Returns [N, m].
PO.MBE.Oil.OOIP
Estimates OOIP from F vs Et (no water influx), [STB]. N = F / Et.
PO.MBE.Oil.OOIP.Reg
Estimates OOIP using regression on F vs Et data, [STB]. Least-squares through origin.
PO.MBE.Oil.OOIP.We
Estimates OOIP with water influx, [STB]. N = (F - We) / Et.
PO.MBE.Oil.Residual
Calculates normalized MBE residual for quality check, [fraction]. Should be close to 0.
PO.MBE.Oil.We
Infers water influx from material balance given known OOIP, [RB]. We = F - N*Et.