MULTI-PROBE DEVICE OF RADIO-ISOTOPE LOGGING FOR INVESTIGATION OF NATURAL AND TECHNOGENOUS ROCKS

摘要

The invention relates to devices for geo-physical well investigations by methods of radio-isotope logging that include the neutron-neutron logging (NNL), gamma-gamma logging (GGL), gamma-logging (GL). The multi-probe device for radioisotope logging (RL) includes two NNL probes, GGL probe, one or two GL probes placed along the device in such a way that the probes have no cross-effect, and at that the length of the device at given power of the sources of neutrons and gamma-quantums is minimal. The technical result: obtaining at one lowering-lifting operation of enlarged set of geo-physical and engineering-geological parameters of rocks, with increase of accuracy of determination of parameters of natural and technogenous rocks, with substantial increase of self-descriptiveness of logging, and productivity, efficiency, economy of logging operations.