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Phase Behavior and ThermodynamicsPVT Properties

Petrosky-Farshad Undersaturated Oil Compressibility Calculator

co=1.705×10−7Rsb0.69357γg0.1885API0.3272T0.6729p−0.5906c_o=1.705\times10^{-7}R_{sb}^{0.69357}\gamma_g^{0.1885}API^{0.3272}T^{0.6729}p^{-0.5906}

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

5 variables

Calculation runs locally with the shared TypeScript engine.

Formula reference

Petrosky-Farshad Undersaturated Oil Compressibility calculates undersaturated oil compressibility for pvt properties workflows in phase behavior and thermodynamics.

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.