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.