Water-drive recovery

Input(s)

Ø: Porosity (fraction)

$\mathrm{S}_{\mathrm{w}}$: Water Saturation (fraction)

$\mathrm{B}_{\mathrm{oi}}: \quad \mathrm{FVF}$ at Initial Conditions of Reservoir (RB/STB)

k: Permeability (D)

$\mu_{\mathrm{wi}}$: Water Viscosity $(\mathrm{cP})$

$\mu_{\mathrm{oi}}$: Oil Viscocity $(\mathrm{cP})$

$\mathrm{P}_{\mathrm{i}}$: Initial Pressure (psi)

$\mathrm{P}_{\mathrm{a}}$: Pressure at Depletion $(\mathrm{psi})$

Output(s)

$\mathrm{E}_{\mathrm{R}}$: Fractional Recovery Efficiency (fraction)

Formula(s)

$$ \mathrm{E}_{\mathrm{R}}=54.898 *\left(\frac{\emptyset *\left(1-\mathrm{S}_{\mathrm{w}}\right)}{\mathrm{B}_{\mathrm{oi}}}\right)^{0.0422} *\left(\frac{\mathrm{k} * \mu_{\mathrm{wi}}}{\mu_{\mathrm{oi}}}\right)^{0.0770} *\left(\mathrm{~S}_{\mathrm{w}}\right)^{-0.1903} *\left(\frac{\mathrm{P}_{\mathrm{i}}}{\mathrm{P}_{\mathrm{a}}}\right)^{-0.2159} $$

Reference(s)

Craig Jr. F. F., 2004, The Reservoir Engineering Aspects of Waterflooding, Vol. 3. Richardson, Texas: Monograph Series, SPE, Page: 83.