机电工程技术2025，Vol.54Issue(7)：40-44,5.DOI:10.3969/j.issn.1009-9492.2025.07.008
基于铀裂变瞬发中子时间谱的地层密度与地层铀含量响应的关系研究
Study on the Relationship between Formation Density and Formation Uranium Content Response Based on Uranium Fission Instantaneous Neutron Time Spectrum
摘要
Abstract
Instantaneous fission neutron uranium logging is a new nuclear logging technology that is fast,can directly measure uranium,and can quantitatively determine the uranium content in formation rocks on site.In order to eliminate the influence of geological environmental factors on the logging of uranium deposits using transient fission neutrons,and drawing inspiration from the"three degree"parameters of oil and gas mineral development formations,an in-depth analysis of the response of formation density and uranium content in the logging of uranium deposits using transient fission neutrons is conducted.Using the MCNP6 numerical simulation program,a calculation model for instantaneous fission neutron uranium logging under naked eye conditions is established.By adjusting the ratio of formation compounds to modify the proportion of elements in the formation,the formation density is changed.Different formation density groups are designed within the range of 1.7 to 2.4 when the formation density is determined.Reuse the Monte Carlo program to conduct grouping experiments on the model,and import the obtained time spectrum data into MATLAB for data processing.Finally,eight different sets of original and normalized time spectra are obtained,and the uranium content response of the group is determined by selecting the appropriate multiplication ratio for the time period.Finally,a correction function is given using linear fitting,satisfactory experimental results are obtained.关键词
中子测井/地层密度/铀矿/蒙特卡罗模拟Key words
neutron logging/formation density/uranium mine/Monte Carlo simulation分类
地质学引用本文复制引用
吕宇,陈锐..基于铀裂变瞬发中子时间谱的地层密度与地层铀含量响应的关系研究[J].机电工程技术,2025,54(7):40-44,5.基金项目
国家自然科学基金(12365026) （12365026）
江西省重点研发计划重点项目(20232BBE50013) （20232BBE50013）
江西省自然科学基金(20242BAB25046) （20242BAB25046）
