Resistivity index-Archie's law
Input(s)
\(R_{t}\): True Resistivity (ohm m)
\(R_{o}\): Resistivity of Rock Filled with Water (ohm m)
Output(s)
RI: Resistivity Index (unitless)
Formula(s)
\[
R I=\frac{R_{t}}{R_{o}}
\]
Reference(s)
Core Laboratories. 2005. Formation Evaluation and Petrophysics, Page: 42.