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Uranium ore logging instrument fusing natural gamma energy spectrum and neutron time spectrum, and uranium quantitative equation

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

Active Publication Date: 2018-11-16
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 ore logging instrument fusing natural gamma energy spectrum and neutron time spectrum, and uranium quantitative equation
  • Uranium ore logging instrument fusing natural gamma energy spectrum and neutron time spectrum, and uranium quantitative equation
  • Uranium ore logging instrument fusing natural gamma energy spectrum and neutron time spectrum, and uranium quantitative equation

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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 logging instrument fusing a natural gamma energy spectrum and a neutron time spectrum, and a uranium quantitative equation, and particularly relates to a basic structure of the uranium ore logging instrument which can measure the natural gamma energy spectrum formed by natural radioactive elements in a rock stratum and an ore deposit and the instantaneous neutron time spectrum caused by pulse neutron uranium fission point by point along drilled holes, and the quantitative equation for determining the contents of the natural radioactive elements such as uranium, thorium, radium and potassium in the rock stratum and the ore deposit through the two types of logging data. The uranium ore logging instrument fusing the natural gamma energy spectrum and the neutron time spectrum, and the uranium quantitative equation are organic combination and data fusion of two nuclear logging methods, especially, aiming at the natural gamma logging method for uranium ore quantification, the uranium ore logging instrument fusing the natural gamma energy spectrum and the neutron time spectrum, and the uranium quantitative equation have the effects that radioactive balance correction without uranium, radium and radon is achieved and thus core sampling and chemical analysis are not needed, and then have the advantages that the drilling efficiency is improved, the exploration cost is lowered, and the uranium quantification cycle is shortened, and uranium ore quantitative analysis in a drilling site can further be achieved 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...

Claims

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Application Information

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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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