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Pseudo-Skin Factor Due to Partial Penetration - Papatzacos Correlation Calculator

sp=1−bbln⁡(πhd2)+1bln⁡[bb+2Ap−1Bp−1]s_p=\frac{1-b}{b}\ln\left(\frac{\pi h_d}{2}\right)+\frac{1}{b}\ln\left[\frac{b}{b+2}\sqrt{\frac{A_p-1}{B_p-1}}\right]

Enter the required inputs, confirm the units, and run the calculator to solve s_p. Review the formula source and assumptions before using the result in engineering work.

Tabular solver

Inputs

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

6 variables

Calculation runs locally with the shared TypeScript engine.

Formula reference

Pseudo-Skin Factor Due to Partial Penetration - Papatzacos Correlation calculates partial-penetration pseudo-skin factor for well performance workflows in production engineering.

View formula, units, and source

Assumptions

  • Input values are representative for the well, reservoir, fluid, or equipment case being evaluated.
  • The declared units match the field-unit constants used in the formula.
  • The cited formula applies to the selected petroleum engineering workflow.

Common mistakes

  • Mixing unit systems without converting the inputs.
  • Using default example values as field recommendations.
  • Applying the formula outside the source assumptions.