METHOD AND DEVICE FOR DETERMINATION OF PARAMETERS OF NATURAL AND TECHNOGENOUS EARTHS BY MEANS OF RADIO-ISOTOPE LOGGING

摘要

The invention relates to the area of well geo-physical investigations of surface natural and technogenous rocks (earths). The method for determination of parameters of natural and technogenous earths by means of radio-isotope logging is in radiation of earth with quick neutrons and in discrete registration of slow neutrons. At that slow neutrons are registered at two probe distances, by means of the ratio of readings of two probes by slow neutrons one determines content of hydrogen. By means of registration of gamma-quant of natural radiation of earth one obtains clayiness index with quantitative evaluation of content of chemically bound water. By means of difference between hydrogen content and content of chemically bound water one determines humidity. By means of registration of epithermal neutrons with probe matched to the nearest probe of slow neutrons one obtains the ratio of epithermal neutrons counting rate to difference between counting rate of slow and epithermal neutrons, with use of that ratio for determination of content of chemical elements abnormal absorbers of neutrons. A device for realization of the method includes two detectors of slow neutrons, one detector of epithermal neutrons and one gamma-quant detector. The technical result of the invention is in increase of reliability and accuracy of determination of humidity of earths and increase of self-descriptiveness of radio-isotope logging.