ESP Hydraulics Functions
Head and pressure, pump performance, gas handling, curve fitting and viscosity correction.
40 functions
PO.ESP.Head.FromPressure(P, SG)
Converts pressure to head using fluid specific gravity, [ft].
PO.ESP.Head.ToPressure(H, SG)
Converts head to pressure using fluid specific gravity, [psi].
PO.ESP.Head.Static(TVD, SG)
Calculates static head from vertical depth, [ft].
PO.ESP.Head.PressureAtDepth(P_surface, TVD, SG)
Calculates pressure at depth given surface pressure, [psi].
PO.ESP.TDH(TVD_pump, WHP, PIP, friction_head, SG)
Calculates Total Dynamic Head for ESP sizing, [ft].
PO.ESP.TDH.Full(TVD_pump, WHP, P_res, PI, Q, submergence, friction_head, SG)
Extended TDH calculation with IPR-based PIP, [ft].
PO.ESP.TDH.NetLift(TVD_pump, DFL)
Calculates net vertical lift (pump depth minus fluid level), [ft].
PO.ESP.HydraulicHP(Q, TDH, SG)
Calculates theoretical hydraulic horsepower (bbl/d basis), [HP].
PO.ESP.HydraulicHP.GPM(Q, TDH, SG)
Calculates theoretical hydraulic horsepower (gpm basis), [HP].
PO.ESP.BrakeHP(HP_hyd, efficiency)
Calculates brake horsepower accounting for pump efficiency, [HP].
PO.ESP.BrakeHP.FromRate(Q, TDH, SG, efficiency)
Calculates brake horsepower directly from rate and head, [HP].
PO.ESP.Stages(TDH, head_per_stage)
Calculates required number of pump stages (rounded up), [stages].
PO.ESP.Stages.Actual(TDH, head_per_stage)
Returns exact (non-rounded) stage count for sensitivity analysis, [stages].
PO.ESP.Pump.TotalHead(stages, head_per_stage)
Calculates total head from number of stages, [ft].
PO.ESP.Pump.TotalPower(stages, power_per_stage)
Calculates total power from number of stages, [HP].
PO.ESP.Pump.Efficiency(HP_hyd, BHP)
Calculates pump efficiency from hydraulic and brake HP, [fraction].
PO.ESP.Pump.Pdis(PIP, stages, head_per_stage, SG)
Calculates pump discharge pressure, [psi].
PO.ESP.Pump.SG.Mix(SG_oil, SG_water, watercut)
Calculates composite SG for oil-water mixture, [dimensionless].
PO.ESP.Gas.Qg.Free(Qo, GOR, Rs, Bg)
Calculates free gas rate at pump intake conditions, [rcf/d].
PO.ESP.Gas.Ql.Total(Qo, Qw, Bo, Bw)
Calculates total liquid rate at pump intake, [bbl/d].
PO.ESP.Gas.Void(Qg_intake, Ql_intake)
Calculates gas void fraction at pump intake, [fraction].
PO.ESP.Gas.Void.Full(Qo, Qw, GOR, Rs, Bo, Bw, Bg)
Complete gas void fraction calculation from field data, [fraction].
PO.ESP.Gas.RhoMix(Rho_l, Rho_g, lambda_g)
Calculates gas-liquid mixture density, [lb/ft3].
PO.ESP.Gas.Turpin.Factor(P_intake, Pb)
Calculates Turpin gas handling factor, [dimensionless].
PO.ESP.Gas.Dunbar.Factor(lambda_g)
Calculates Dunbar gas correction factor, [dimensionless].
PO.ESP.Gas.Sep.Eff(Ql, lambda_g, separator_type)
Estimates rotary gas separator efficiency, [fraction].
PO.ESP.Gas.Void.PostSep(lambda_g_in, efficiency)
Calculates void fraction after gas separator, [fraction].
PO.ESP.Gas.Recommendation(lambda_g)
Returns gas handling recommendation based on void fraction.
PO.ESP.Curve.Head(Q, curve_Q, curve_Head)
Interpolates head from pump performance curve, [ft/stage].
PO.ESP.Curve.Efficiency(Q, curve_Q, curve_Eff)
Interpolates efficiency from pump performance curve, [fraction].
PO.ESP.Curve.Power(Q, curve_Q, curve_HP)
Interpolates power per stage from pump curve, [HP/stage].
PO.ESP.Curve.BEP(curve_Q, curve_Eff)
Returns Best Efficiency Point flow rate from pump curve, [bbl/d].
PO.ESP.Curve.BEP.Eff(curve_Q, curve_Eff)
Returns maximum efficiency value from pump curve, [fraction].
PO.ESP.Curve.InRange(Q, Q_min, Q_max)
Checks if operating point is within recommended range.
PO.ESP.Curve.Range.Status(Q, curve_Q, curve_Eff)
Returns descriptive operating range status.
PO.ESP.Viscosity.Quick.Factor(viscosity, SG)
Simplified viscosity correction for screening, [dimensionless].
PO.ESP.Viscosity.Head.Corr(H_water, C_H)
Applies viscosity correction to head, [ft].
PO.ESP.Viscosity.Eff.Corr(Eff_water, C_Eff)
Applies viscosity correction to efficiency, [fraction].
PO.ESP.Viscosity.Rate.Corr(Q_water, C_Q)
Applies viscosity correction to flow rate, [gpm].
PO.ESP.Viscosity.Recommendation(viscosity_cSt)
Returns viscosity-based ESP recommendation.