Quantitative method for uranium ore logging using prompt neutron time spectrum to correct natural gamma total

Abstract

The invention discloses a uranium ore quantitative method for fused prompt neutron time spectrum logging to correct natural gamma total logging in the fields of uranium ore exploration and in-situ leaching uranium mining. Specifically, it refers to: for the uranium-bearing rock ore layer in the drill hole, using two types of logging data of natural gamma total logging and prompt neutron time spectrum logging, constructing a well that is based on natural gamma total logging and has "uranium -Radium-Radon” balance correction uranium ore quantitative interpretation method; and use the logging data of standard model wells to construct the calculation method of scale parameters such as conversion coefficient and background response required for uranium ore quantification. Compared with the uranium ore quantitative method of single prompt neutron time spectrum logging or natural gamma total logging, the present invention does not require rock core sampling and chemical analysis methods, and can not only obtain the "uranium-radium-radon" balance coefficient, but also It can greatly increase the logging speed, and thus has the advantages of improving drilling efficiency, reducing exploration costs, shortening the uranium quantification period, and can realize the on-site analysis of uranium ore quantification through computer programming.

Description

technical field [0001] The invention relates to a nuclear logging quantitative method for uranium ore used in the fields of uranium ore exploration and in-situ leaching uranium mining, in particular to a uranium logging quantitative method for correcting natural gamma total amount by integrating prompt neutron time spectrum. Background technique [0002] Quantification of solid minerals mainly depends on the chemical analysis method of drilling core sampling. This method is the most direct traditional method for quantifying elements in rock ore layers, but it also brings low efficiency of core drilling, high cost of core sampling, and chemical analysis period. Long and other disadvantages. However, my country's uranium deposits generally have the characteristics of low content, thin ore thickness, and scattered ore bodies. For example, the minimum recoverable grade of sandstone-type uranium deposits is only 0.01% uranium content, and the mineable thickness only needs to be m...

AI Technical Summary

Problems solved by technology

However, compared with natural gamma total logging, the number of prompt neutrons in uranium fission is very small, so the speed of prompt neutron logging is very slow, and its logging efficiency is even so low that it is difficult to be practical

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