瞬发裂变中子测井与γ测井在砂岩型铀矿钻孔的比对

Comparisons of Prompt Fission Neutron Logging and Gamma Logging Applied in Sandstone-type Uranium Ore Drill Holes

瞬发裂变中子测井是一种直接测铀测井技术,其与传统γ测井相比,具有不受放射性平衡干扰的优点,并结合γ测井可直接给出铀镭平衡系数。本文通过瞬发裂变中子测井与γ测井在砂岩型铀矿钻孔的解释结果比对,及17个见矿孔实测统计分析,验证了瞬发裂变中子测井方法对钻孔矿层的铀含量分析准确,突出了此种方法应用于铀镭不平衡且变化大的砂岩型铀矿测量时具有显著的技术优势。

The prompt fission neutron logging is a well logging technology with direct measurement of uranium. Compared with the traditional gamma logging, this method is free of the interference from radi- oactive equilibrium and can directly give the uranium-radium equilibrium coefficient with the help of gam- ma logging. By comparing the results of sandstone-type＇uranium ore through the prompt fission neutron logging and gamma logging, combined with the measured statistical analyses of 17 discovered ore holes, it is verified that the prompt fission neutron logging method has accurate analysis of the uranium content in the ore bed of the drill holes, highlighting the significant technical advantage of this method for measuring sandstone-type uranium ore with uranium-radium non-equilibrium and huge variation.