Interporosity flow coefficient in pressure build-up test

Input(s)

$\omega$: Storativity of the Fractures (dimensionless)

$\phi_{m}$: Matrix Porosity (fraction)

$h_{m}$: Matrix Thickness $(\mathrm{ft})$

$c_{m}$: Matrix Compressibility (1/psi)

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

$r_{w}$: Wellbore Radius (ft)

$k_{f}$: Fracture Permeability $(\mathrm{mD})$

$t_{p}$: Production Time (day)

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

Output(s)

$\lambda$: Interporosity Flow Coefficient (dimensionless)

Formula(s)

or

Reference(s)

Ahmed, T., McKinney, P.D. 2005. Advanced Reservoir Engineering, Gulf Publishing of Elsevier, Chapter: 1, Page: 84.