Mathematical derivation of density log from total gamma ray and neutron logs in clastic rocks, a case study, Egypt

In spite of the fact that, the three empirical regression equations revealed different slopes and various intercept values, yet these equations were found to be nearly identical, when applied to the same values and compared to each other. The differences between the slopes and intercepts in the three equations refer to the various depositional environments in the three studied regions as well as their different depths and consequently their diverse pressures.