True resistivity - Archie
Input(s)
\(F\): Factor of Formation (dimensionless)
\(R_{w}\): Resistivity of the Saturating Brine (ohm length)
\(R I\): Resistivity Index of Saturation (dimensionless)
Output(s)
\(R_{t}\): True Resistivity (ohm length)
Formula(s)
\[
R_{t}=F * R_{w} * R I
\]
Reference(s)
Core Laboratories. 2005. Formation Evaluation and Petrophysics, Page: 38.