Radius of investigation

Input(s)

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

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

$\emptyset$: Porosity (fraction)

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

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

Output(s)

$r_{i}$: Radius of Investigation at the end of Injection Time (ft)

Formula(s)

$$ r_{i}=0.0359 *\left(\left(\frac{k * t}{\phi * \mu * c_{t}}\right)^{0.5}\right) $$

Reference(s)

Ahmed, T., McKinney, P.D. 2005. Advanced Reservoir Engineering, Gulf Publishing of Elsevier, Chapter: 1, Page: 134