FIELD: mining.
SUBSTANCE: invention discloses the logging of well penetrating the underground bed with at least one logging operation at well section. Note here that logging instrument is displaced in every said operation. Said instrument comprises neutron emitter and at least one detector to measured heat neutron capture gammas-radiation to obtain the gamma-radiation capture spectrum subject to instrument in-well position. Note here that said gamma-radiation capture spectra to reveal the presence of proppant containing the material with large cross-section of het neutron capture in the bed and/or well area. Capture gamma-radiation emitted from proppant containing the material with large cross-section of heat neutron capture differs from that resulting from reaction of heat neutrons with the other components of the bed and well. Note that said difference comprises the following. Subtraction of reference spectra of separate elements. Approximation with the help of least square method or other spectra processing/deconvolution procedures for limitation of capture gamma-radiation emitted by the material with large cross-section of heat neutron capture contained in proppant, or capture gamma-radiation emitted from the other elements. Note also that said determination comprises identification of sections in the well wherein detected is capture gamma-radiation emitted by the material with large cross-section of heat neutron capture.
EFFECT: simplified operation, lower labour input, higher safety and reliability.
22 cl, 27 dwg, 8 tbl
