Welge extension - Fractional flow

Input(s)

$\mathrm{f}_{\mathrm{o}}$: Fractional Flow of Oil Obtained (fraction)

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

$\mu_{\mathrm{o}}$: Viscosity of Oil $(\mathrm{cP})$

Output(s)

relpr: Relative Permeability Ratio of Water to Oil (fraction)

Formula(s)

$$ \operatorname{relpr}=\frac{\mu_{\mathrm{w}}}{\mu_{\mathrm{o}}} *\left(\frac{1-\mathrm{f}_{\mathrm{o}}}{\mathrm{f}_{\mathrm{o}}}\right) $$

Reference(s)

Dandekar, A. Y. 2006. Petroleum Reservoir Rock and Fluid Properties. Boca Raton, FL: CRC Press Taylor \& Francis Group, Chapter: 9, Page: 215.