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Uranium logging tool and uranium quantitative equation combining natural gamma energy spectrum and neutron time spectrum

A technology of time spectrum and gamma energy spectrum, which is applied in the field of uranium logging tools, can solve the problems of slow logging speed and low detection efficiency of uranium fission prompt neutrons

Active Publication Date: 2021-04-16
EAST CHINA UNIV OF TECH
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Problems solved by technology

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

Method used

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  • Uranium logging tool and uranium quantitative equation combining natural gamma energy spectrum and neutron time spectrum
  • Uranium logging tool and uranium quantitative equation combining natural gamma energy spectrum and neutron time spectrum
  • Uranium logging tool and uranium quantitative equation combining natural gamma energy spectrum and neutron time spectrum

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Embodiment Construction

[0054] The invention discloses the basic structure of a combined well logging instrument which combines natural gamma energy spectrum logging and uranium fission prompt neutron time spectrum logging in the field of uranium exploration and mining (uranium ore exploration and in-situ leaching uranium mining). And the key logging parameter calibration method for determining the content of natural radioactive elements such as uranium, thorium, radium, potassium, etc. in the rock ore layer by using the combined logging. Including the basic structure of the combination logging tool (the block diagram is as follows figure 1 shown), the natural gamma energy spectrum logging data obtained from the scale model well of the measured saturated ore seam (the example results of the natural gamma energy spectrum curve at the center point of the saturated ore seam are shown in Fig. 2(b) to Fig. 3(b), Figure 4 ~ Figure 5 , Figure 6(b) ~ Figure 7(b), Figure 8 , shown in Figure 9(b)), uranium ...

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Abstract

The invention discloses a uranium ore well logging tool and a uranium quantitative equation for integrating natural gamma energy spectrum and neutron time spectrum, and specifically refers to: a device capable of measuring the formation of natural radioactive elements in rock ore layers point by point along the borehole The basic structure of the uranium logging tool of the natural gamma energy spectrum and the prompt neutron time spectrum caused by the pulsed neutron uranium fission, and the use of these two types of logging data to determine the natural radioactivity of uranium, thorium, radium, potassium, etc. Quantitative equations for elemental content. The present invention is an organic combination and data fusion of two types of nuclear logging methods, especially for the natural gamma logging method of uranium ore quantification. Core sampling and chemical analysis have the advantages of improving drilling efficiency, reducing exploration costs, shortening the uranium quantification cycle, etc., and can also realize the quantitative analysis of uranium ore on the drilling site through computer programming.

Description

technical field [0001] The invention relates to a uranium well logging method for uranium exploration and mining, which can measure the natural gamma energy spectrum formed by natural radioactive elements in the rock ore layer and the prompt neutron time spectrum caused by pulse neutron uranium fission point by point along the borehole The basic structure of the instrument; and the quantitative equation for determining the content of natural radioactive elements such as uranium, thorium, radium, and potassium in the rock ore layer by using the logging data of the logging instrument. Background technique [0002] Quantification of solid minerals mainly depends on the chemical analysis method of drilling core sampling, which is also the most direct method for quantification of rock ore layer elements. However, most radioactive minerals are rare and precious metals, especially uranium mines are generally thin in thickness and low in content. For example, the thickness of sandst...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00
CPCE21B49/00
Inventor 汤彬王海涛陈锐黄凡张积运张雄杰刘志锋王仁波周书民管少斌瞿金辉
Owner EAST CHINA UNIV OF TECH
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