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Reservoir EngineeringPressure Transient Analysis

Horner Pressure Buildup Equation Calculator

Pws=Pi−162.6QoBoμokhlog⁡10(tp+ΔtΔt)P_{ws}=P_i-\frac{162.6 Q_o B_o \mu_o}{k h}\log_{10}\left(\frac{t_p+\Delta t}{\Delta t}\right)

Enter the required inputs, confirm the units, and run the calculator to solve P_ws. 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.

8 variables

Calculation runs locally with the shared TypeScript engine.

Formula reference

Horner Pressure Buildup Equation calculates shut-in bottomhole pressure on horner straight line for pressure transient analysis workflows in reservoir 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.