Fraction of total porosity occupied by clays
Input(s)
\(\Phi_{S}\): Sonic Log Porosity (fraction)
\(\Phi_{D}\): Density Log Porosity (fraction)
Output(s)
q: Fraction of the Total Porosity Occupied by Clays (fraction)
Formula(s)
\[
q=\frac{\left(\Phi_{S}\right)-\left(\Phi_{D}\right)}{\Phi_{S}}
\]
Reference(s)
Core Laboratories. 2005: Formation Evaluation and Petrophysics, Page: 98.