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.