Porosity corrected for gas effect

Input(s)

$\Phi_{D}$: Density Porosity (fraction)

$\Phi_{N}$: Neutron Porosity (fraction)

Output(s)

$\Phi_{c \text { or } r}$: Corrected Porosity for the Gas Effect (fraction)

Formula(s)

$$ \Phi_{\text {cor } r}=\left(\frac{\left(\Phi_{D}\right)^{2}+\left(\Phi_{N}\right)^{2}}{2}\right)^{0.5} $$

Reference(s)

Core Laboratories. 2005. Formation Evaluation and Petrophysics, Page: 111.