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.