Dimensionless time for interference testing in homogeneous reservoirs - Earlougher

Input(s)

k: Permeability (mD)

$\emptyset$: Porosity (fraction)

$\mathrm{t}$: Time $(\mathrm{h})$

$\mathrm{k}$: Overall Production $(\mathrm{mD})$

$\mu$: Viscosity $(\mathrm{cP})$

$c_{t}$: Total Compressibility $(1 / p s i)$

$\mathrm{r}_{\mathrm{w}}$: Wellbore Radius (ft)

Output(s)

$t_{D}$: Dimensionless Time (dimensionless)

Formula(s)

$$ \mathrm{t}_{\mathrm{D}}=\frac{0.0002637 * \mathrm{k} * \mathrm{t}}{\emptyset * \mathrm{c}_{\mathrm{t}} * \mu *\left(\mathrm{r}_{\mathrm{w}}^{2}\right)} $$

Reference(s)

Ahmed, T., McKinney, P.D. 2005. Advanced Reservoir Engineering, Gulf Publishing of Elsevier, Chapter: 1, Page: 117.