Physical and Measuring Principles of Nuclear Well Logging Techniques

Abstract

Proceedings from the general task of nuclear geophysics as a special discipline of applied geophysics, the essential physical problems of nuclear well logging techniques are considered. Particularly, the quantitative connexion between measured value and interesting geologic parameter to be determined are treated taking into account internal and external perturbation parameters, Resulting from this study, the technological requirements for radiation sources and there necessary screening, for detectors, electronic circuitry in logging tools, signal transmission by the cable and recording equipment are derived, and explained on examples of gamma-gamma- and neutron-neutron-logging.