Spectral gamma-ray log interpretation algorithms using the Monte Carlo multiply scattered components approach

New algorithms for spectral gamma-ray log interpretation have been developed on the basis of a novel approach originally developed for natural gamma-ray log interpretation using the lithology-independent Monte Carlo multiply scattered components (MCMSC) approach. With separation of density and composition effects, the new algorithms have fewer parameters and have been designed for both natural gamma-ray and gamma-gamma litho-density logs.