Phillips equation (sandstones)
Input(s)
\(\Phi\): Porosity (dimensionless)
Output(s)
F: Formation Resistivity Factor (dimensionless)
Formula(s)
\[
F=\frac{1.45}{(\Phi)^{1.54}}
\]
Reference(s)
Bassiouni, Z., 1994, Theory, Measurement, and Interpretation of Well Logs. SPE Textbook Series Vol. 4. Chapter 1, Page: 8 .