Resistivity of a water-saturated shaly sand (Vsh models)

Input(s)

$R_{w}$: Formation Water Resistivity (ohm m)

$V_{s h}$: Bulk Volume Fraction of Shale (fraction)

$R_{s h}$: Shale Resistivity (ohm m)

F: Formation Resistivity Factor (dimensionless)

Output(s)

$\alpha$: Clay Distribution Factor (dimensionless)

$\beta$: Clay Distribution Factor (dimensionless)

$\frac{1}{R_{o}}$: Formation Hydrocarbon Resistivity (per(ohm m))

Formula(s)

Reference(s)

Bassiouni, Z., 1994, Theory, Measurement, and Interpretation of Well Logs. SPE Textbook Series Vol. 4. Chapter 1, Page: 16.