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Vogel Inflow Performance Relationship Calculator

qo=qmax[1−0.2(PwfPr)−0.8(PwfPr)2]q_o = q_{max}\left[1 - 0.2\left(\frac{P_{wf}}{P_r}\right) - 0.8\left(\frac{P_{wf}}{P_r}\right)^2\right]

Enter maximum oil rate, flowing bottomhole pressure, and reservoir pressure. The calculator returns the predicted oil rate.

Tabular solver

Inputs

Defaults provide a quick field-unit example for the equation.

3 variables

Calculation runs locally with the shared TypeScript engine.

Formula reference

The Vogel IPR estimates oil well inflow rate under two-phase flow conditions using flowing bottomhole pressure and average reservoir pressure.

View formula, units, and source

Assumptions

  • The well behavior matches the empirical Vogel oil IPR relationship.
  • Reservoir pressure and bottomhole flowing pressure are representative.
  • The equation is applied within its intended oil-well inflow context.

Common mistakes

  • Applying Vogel directly to dry-gas wells.
  • Using wellhead pressure instead of bottomhole flowing pressure.
  • Forgetting that pressure ratio terms should be dimensionless.