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Slurry density correction method based on uranium fission transient neutron logging data

A mud density and prompt neutron technology, applied in the field of uranium ore exploration, can solve the problems of high measurement cost, low drilling efficiency, long uranium quantification time, etc., and achieve the effect of reducing the impact

Active Publication Date: 2020-10-30
EAST CHINA UNIV OF TECH
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Problems solved by technology

[0002] In the field of uranium ore exploration, my country has been using natural gamma logging to quantify uranium ore. Because uranium is not gamma nuclide, but its decay daughter, this method belongs to the "indirect uranium measurement" technology, which requires core sampling and chemical analysis. Analyze and obtain the radioactive balance coefficient of uranium and daughters (especially radium and daughters), and the γ-ray share of thorium-based gamma nuclides, so as to correct the quantitative deviation caused by these factors; therefore, it has the advantages of low drilling efficiency, measurement Disadvantages such as high cost and long time for uranium quantification

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  • Slurry density correction method based on uranium fission transient neutron logging data
  • Slurry density correction method based on uranium fission transient neutron logging data
  • Slurry density correction method based on uranium fission transient neutron logging data

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[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0038] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art wi...

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Abstract

The invention discloses a slurry density correction method based on uranium fission instantaneous neutron logging data. A numerical logging model is established through Monte Carlo (MCNP) simulation;according to the change relation of transient fission neutron uranium mine logging thermal neutrons and epithermal neutron densities along with the stratum environment, related factors influencing thelogging neutron time spectrum are studied; the influence of different mud densities under the same borehole diameter on E / T (the ratio of epithermal neutrons to thermal neutrons) in transient fissionneutron uranium mine logging is discussed, a correction function influenced by the stratum environment is given through an MCNP simulation data fitting method, and the influence of different mud densities on uranium content measurement can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of uranium ore exploration, in particular to a mud density correction method based on uranium fission prompt neutron logging data. Background technique [0002] In the field of uranium ore exploration, my country has been using natural gamma logging to quantify uranium ore. Because uranium is not gamma nuclide, but its decay daughter, this method belongs to the "indirect uranium measurement" technology, which requires core sampling and chemical analysis. Analyze and obtain the radioactive balance coefficient of uranium and daughters (especially radium and daughters), and the γ-ray share of thorium-based gamma nuclides, so as to correct the quantitative deviation caused by these factors; therefore, it has the advantages of low drilling efficiency, measurement Disadvantages such as high cost and long time for uranium quantification. The uranium fission prompt neutron logging method is a nuclear logging method b...

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Application Information

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IPC IPC(8): G06F30/20E21B49/00
CPCG06F30/20E21B49/005
Inventor 刘志锋汤彬何月顺王海涛王仁波黄凡张丽娇张焱罗建彪宋非
Owner EAST CHINA UNIV OF TECH
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