Calculation method of calibration parameters of uranium mine logging by combining natural gamma energy spectrum and neutron time spectrum

Abstract

The invention discloses a uranium well logging method and calibration parameter calculation method for uranium ore prospecting and fusion of natural gamma energy spectrum and prompt neutron time spectrum. Specifically, it refers to measuring the natural gamma energy spectrum formed by natural radioactive elements in the rock ore layer and the prompt neutron time spectrum caused by pulsed neutron uranium fission point by point along the borehole, and analyzing the uranium, thorium, radium, Uranium ore logging methods for the content of natural radioactive elements such as potassium, and calculation methods for scaling parameters such as conversion coefficients, sensitivity factors, and background responses. The present invention is an organic combination and data fusion of two types of nuclear logging methods, especially for a single nuclear logging method for uranium ore quantification. It does not require core sampling and chemical analysis, and has the advantages of improving drilling efficiency, reducing exploration costs, and shortening the uranium quantification cycle. It can also realize quantitative on-site analysis of uranium ore through computer programming.

Description

technical field [0001] The invention relates to a uranium ore exploration and mining (uranium ore exploration and in-situ leaching uranium mining) that can measure the natural gamma energy spectrum formed by natural radioactive elements in the rock ore layer point by point along the borehole, and the instantaneous pulse neutron uranium fission. The uranium ore logging method that emits neutron time spectrum; and the conversion coefficient, sensitivity factor, and background response of the natural radioactive elements such as uranium, thorium, radium, potassium, etc. Calculation method of the calibration parameters of the logging tool. Background technique [0002] Quantification of solid minerals mainly depends on the chemical analysis method of drilling core sampling. This method is the most direct method for quantifying rock and mineral elements, but it also brings disadvantages such as low efficiency of core drilling, high cost of core sampling, and long chemical analysi...

AI Technical Summary

Problems solved by technology

However, the number of prompt neutrons from uranium fission is small, so the logging efficiency is very low, and the logging speed is much slower than that of natural gamma spectrum logging

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