Vogel Two-Phase Inflow Performance (IPR) Calculator
Compute two-phase Inflow Performance Relationship (IPR) curves below bubble point pressure, maximum Absolute Open Flow ($AOF$), and production rates.
Well Test & Reservoir Pressures
P_b = P_R for saturated reservoir
Desired artificial lift intake pressure
Maximum Inflow & Target Operating Rate
Absolute Open Flow (AOF / q_max)
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Theoretical rate at P_wf = 0 psi
Target Rate q(P_wf_target)
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Drawdown Δp
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Secant PI (J)
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P_wf / P_R Ratio
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Vogel Curvature Rule
q / q_max = 1 - 0.2 · (P_wf / P_R) - 0.8 · (P_wf / P_R)²
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