Oil saturation determination (IE and CDN logs)

Input(s)

$R_{o}$: Hydrocarbon Formation Resistivity (ohm m)

$R_{t}$: Rock Resistivity (ohm m)

Output(s)

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

$S_{o}$: Oil Saturation (fraction)

Formula(s)

$$ \begin{aligned} S_{w} & =\left(\frac{R_{o}}{R_{t}}\right)^{0.5} \\ S_{o} & =1-S_{w} \end{aligned} $$

Reference(s)

Bassiouni, Z., 1994, Theory, Measurement, and Interpretation of Well Logs. SPE Textbook Series Vol. 4. Chapter 11, Page: 213.