Formation factor (Archie's equation with resistivity logs)
Input(s)
\(\mathrm{T}\): Tortuosity (unitless)
\(\Phi\): Porosity (fraction)
Output(s)
F: Archie (unitless)
Formula(s)
\[
F=\frac{T}{\Phi}
\]
Reference(s)
Ellis, D.V., Singer, J.M. 2008. Well Logging for Earth Scientists. Second Edition. Springer. Chapter: 4, Page: 76.