Dimensionless shut-in time for MDH method

Input(s)

$\mathrm{k}$: Permeability $(\mathrm{mD})$

$\Delta \mathrm{t}$: Total Shut-in Time (day)

$\emptyset$: Porosity (fraction)

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

$c_{t}$: Total Compressibility $(1 / \mathrm{psi})$

A: Drainage Area $\left(\mathrm{ft}^{2}\right)$

Output(s)

$\Delta t_{D A}$: Dimensionless Shut-in Time (dimensionless)

Formula(s)

$$ \Delta t_{D A}=\frac{0.0002637 * k * \Delta t}{\phi * \mu * c_{t} * A} $$

Reference(s)

Ahmed, T., McKinney, P.D. 2005. Advanced Reservoir Engineering, Gulf Publishing of Elsevier, Chapter: 1, Page: 59.