Water salinity index ratio

Input(s)

C: Water Salinity (ppm)

$C_{a}$: Apparent Water Salinity $(\mathrm{ppm})$

$\emptyset$: Porosity (fraction)

$\emptyset_{a}$: Apparent Porosity (fraction)

Output(s)

$S_{w}$: Water Saturation (fraction)

Formula(s)

$$ \mathrm{S}_{\mathrm{w}}=\frac{\mathrm{C}_{\mathrm{a}}}{\mathrm{C}}=\frac{\varnothing_{\mathrm{a}}}{\varnothing} $$

Reference(s)

Bassiouni, Z., 1994, Theory, Measurement, and Interpretation of Well Logs. SPE Textbook Series Vol. 4. Chapter 9, Page: 183.