Paper: A Look At The Development Of Neutron Logging

In the 1940's neutron logging was commercially developed as an alternate method of determining porosity. The ability to respond to formations behind casing foretold a great future. Unfortunately, however, the same principles which allow a neutron log to predict porosity as a function of the hydrogen index of a formation also produce many undesirable effects. The principles of operation of the compensated neutron log represent the culmination of technology intended to overcome these undesirable effects and to provide a usable tool in the search for petroleum products.