Formation resistivity and porosity relations from well log data based on Porter and Carothers data

Input(s)

$\Phi$: Porosity (dimensionless)

Output(s)

$F_{g}$: Formation Resistivity Factor for California Pliocene (dimensionless)

$F_{c}$: Formation Resistivity Factor for U.S Gulf Coast Miocene (dimensionless)

Formula(s)

$$ \begin{aligned} & F_{g}=\frac{2.45}{(\Phi)^{1.08}} \\ & F_{c}=\frac{1.97}{(\Phi)^{1.29}} \end{aligned} $$

Reference(s)

Bassiouni, Z., 1994, Theory, Measurement, and Interpretation of Well Logs. SPE Textbook Series Vol. 4. Chapter 1, Page: 9.