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Reservoir EngineeringPressure Transient Analysis

Dimensionless Time for Interference Testing in Homogeneous Reservoirs – Earlougher Calculator

tD=0.0002637⋅k⋅tϕ⋅μ⋅ct⋅rw2t_D = \frac{0.0002637 \cdot k \cdot t}{\phi \cdot \mu \cdot c_t \cdot r_w^2}

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

Dimensionless Time for Interference Testing in Homogeneous Reservoirs – Earlougher calculates dimensionless time 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.