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.