Uranium is an important energy material and a key exploration object in the field of radioactive geophysical exploration. Through field study, it was found that fractured uranium is one of the most abundant sources of uranium, therefore it is an important target of energy geophysical exploration. However, the fractured structure increases the difficulty of uranium exploration and analysis. Therefore, in order to identify the distribution and analyse the content of fractured uranium deposits, it is necessary to study the influence of fracture parameters on the occurrence state of uranium ore and its manifestation status in neutron logging response. Considering the fracture structure from different aspects, this study simulated the uranium ore occurrence state in the pore-fracture medium environment and obtained corresponding logging response results by setting two fracture parameters (number density and angle). The study generated several findings, namely: 1. high angle and high porosity fracture type uranium strata have the greatest influence on thermal neutrons; 2. under the condition of high porosity, the neutron energy spectrum displays a dispersion peak and moves towards the high energy region. It is noteworthy that in a high number density environment, medium-low angle uranium ore has the strongest thermal neutron absorption in a low energy range. 3. energy decay rate is the highest in the high angle fracture environment; and 4. the higher the density of the fracture number, the more susceptible the counting is to the influence of the angle factor. These findings can be used to quantitatively analyse the effects of fracture parameters on uranium deposits. These results have important guiding significance to the evaluation of a fractured uranium reservoir.

中文翻译：

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中子测井模拟多角度裂缝铀矿床

铀是放射性地球物理勘探领域中的重要能源材料和关键勘探对象。通过现场研究发现，裂化铀是铀的最丰富来源之一，因此它是能源地球物理勘探的重要目标。但是，断裂的构造增加了铀勘探和分析的难度。因此，为了识别铀矿裂隙的分布并分析其含量，有必要研究断裂参数对铀矿的发生状态及其在中子测井响应中的表现状态的影响。从不同方面考虑断裂结构 这项研究模拟了孔隙裂缝介质环境中铀矿的发生状态，并通过设置两个裂缝参数（数量密度和角度）获得了相应的测井响应结果。该研究产生了以下发现：1.高角度，高孔隙率的裂缝型铀层对热中子影响最大；2.在高孔隙率条件下，中子能谱显示出一个弥散峰，并向高能区移动。值得注意的是，在高密度密度环境中，中低角度铀矿在低能量范围内具有最强的热中子吸收能力。3.在高角度裂缝环境中能量衰减率最高；4.裂缝数的密度越高，计数对角度因子的影响越敏感。这些发现可用于定量分析裂缝参数对铀矿床的影响。这些结果对裂缝性铀储层的评价具有重要的指导意义。