Formation factor - Archie's equation
Input(s)
a: Tortuosity Factor (dimensionless)
\(\Phi\): Porosity (fraction)
m: Cementation Factor (dimensionless)
Output(s)
\(F\): Formation Factor (dimensionless)
Formula(s)
\[
F=\frac{a}{\Phi^{m}}
\]
Notes: \(a\) and \(m\) are measured from log-log plot of \(F\) vs Porosity.
Reference(s)
Core Laboratories. 2005. Formation Evaluation and Petrophysics, Page: 38.