Uranium ore logging scale parameter calculating method fusing natural gamma energy spectrum and neutron time spectrum

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

Active Publication Date: 2018-11-16
EAST CHINA UNIV OF TECH
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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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  • Uranium ore logging scale parameter calculating method fusing natural gamma energy spectrum and neutron time spectrum
  • Uranium ore logging scale parameter calculating method fusing natural gamma energy spectrum and neutron time spectrum
  • Uranium ore logging scale parameter calculating method fusing natural gamma energy spectrum and neutron time spectrum

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Embodiment Construction

[0068] The invention discloses a combined logging method which combines natural gamma energy spectrum logging and uranium fission prompt neutron time spectrum logging in the field of uranium prospecting (uranium prospecting and in-situ leaching uranium mining), and utilizes The method for determining the calibration parameters of natural radioactive elements such as uranium, thorium, radium, potassium, etc. 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 result of the natural gamma energy spectrum curve at the center point of the saturated ore seam is shown in Figure 2(b) ~ Figure 3(b) , Figure 4 ~ Figure 5 , Figure 6(b) ~ Figure 7(b) , Figure 8 , shown in Fig. 9(b)), uranium fission prompt neutron time spectrum logging data (examples of epithermal neutron and thermal neutron tim...

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Abstract

The invention discloses a uranium ore logging method fusing a natural gamma energy spectrum and a prompt neutron time spectrum for uranium ore exploring and mining, and a scale parameter calculating method. Specifically, according to the uranium ore logging method, the natural gamma energy spectrum formed by natural radioactive elements and the prompt neutron time spectrum caused by pulsed neutronuranium fission in a rock ore layer are measured point by point along a drilled hole, and according to the natural gamma energy spectrum and the prompt neutron time spectrum, the contents of the natural radioactive elements of uranium, thorium, radium, potassium and the like in the rock ore layer are analyzed; and the calculating method of scale parameters such as the conversion coefficient, thesensitivity factor and background response of the natural radioactive elements is also included. Organic combination and data fusion of the two nuclear logging methods are achieved, especially for a single nuclear logging method for uranium ore quantification, radioactive balance correction of uranium, radium and radon is not needed, thus the uranium ore logging method has the characteristics thatcore sampling and chemical analysis are not needed, and has the advantages that the drilling efficiency is improved, the exploring cost is lowered, and the uranium quantification cycle is shortened,and uranium ore quantification on-site analysis can also be achieved 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...

Claims

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Application Information

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Patent Type & Authority Applications(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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