Waxman and Smits model - Clean sands

Input(s)

F: Shaly-Sand Formation Resistivity Factor (dimensionless)

Øe: Effective Porosity (fraction)

$\mathrm{C}_{\mathrm{cl}}$: Clay Exchange Cation Conductivity $(1 / \Omega \mathrm{m})$

$\mathrm{C}_{\mathrm{w}}$: Formation Water Conductivity $(1 / \Omega \mathrm{m})$

Output(s)

$\mathrm{C}_{\mathrm{o}}$: Brine Saturated Rock Conductivity $(1 / \Omega \mathrm{m})$

Formula(s)

$$ \mathrm{C}_{\mathrm{o}}=\left(\frac{1}{\mathrm{~F}}\right) *\left(\mathrm{C}_{\mathrm{cl}}+\mathrm{C}_{\mathrm{w}}\right) $$

Reference(s)

Bassiouni, Z., 1994, Theory, Measurement, and Interpretation of Well Logs. SPE Textbook Series Vol. 4. Chapter 1, Page: 17.