Neutron porosity of shale zone
Input(s)
\(\Phi_{T}\): True Formation Porosity (fraction)
\(V_{S h}\): Shale Volume Factor (dimensionless)
\(\Phi_{N S h}\): Neutron Porosity of a Nearby Shale Region (fraction)
Output(s)
\(\Phi_{N}\): Observed Neutron Porosity in a Shaly Formation (fraction)
Formula(s)
\[
\Phi_{N}=\left(\Phi_{T}\right)+\left(V_{S h} * \Phi_{N S h}\right)
\]
Reference(s)
Core Laboratories. 2005. Formation Evaluation and Petrophysics, Page: 108.