Abstract
Fundamental in the quantitative evaluation of shaly formations is the estimation of the bulk volumes of clay, total porosity, and clay bound water. Using clay bound water, total porosity, and salinity, Q v (cation-exchange capacity per unit pore volume) or Swb (bound-water fraction) may be readily obtained, thus enabling determination of water saturation with either the Waxman-Smits or Dual Water saturation equations.