Relationship between rock resistivity and water saturation
Input(s)
F: Formation Resistivity Factor (dimensionless)
\(R_{w}\): Formation Water Resistivity (ohm m)
\(R_{t}\): Rock Resistivity (ohm m)
\(\mathrm{n}\): Saturation Exponent (dimensionless)
Output(s)
\(S_{w}\): Water Saturation (fraction)
Formula(s)
\[
S_{w}=\left(\frac{F * R_{w}}{R_{t}}\right)^{\frac{1}{n}}
\]
Reference(s)
Bassiouni, Z., 1994, Theory, Measurement, and Interpretation of Well Logs. SPE Textbook Series Vol. 4. Chapter 1, Page: 11.