PetroCalcHubFree
Browse
Drilling EngineeringMud and Cementing

API Water Loss from Seven-and-a-Half Minute Filtrate Calculator

V30=2Va−VspV_{30}=2V_a-V_{sp}

Enter the required inputs, confirm the units, and run the calculator to solve V_30. 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.

2 variables

Calculation runs locally with the shared TypeScript engine.

Formula reference

API Water Loss from Seven-and-a-Half Minute Filtrate calculates api water loss at 30 minutes for mud and cementing workflows in drilling 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.