自然γ测井铀定量属“间接铀定量”技术,须利用铀镭平衡、射气逸出等参数修正来校准铀含量。分析了天然放射性核素与特征γ射线的关系,提出了基于高精度γ能谱测井和234mPa特征γ射线(1.001 MeV)光电峰或能量窗的“直接铀定量”方法,利用自主研发的基于LaBr3(Ce)的γ能谱测井仪进行模型井实验,初步验证了方法的可行性。 Natural gamma logging uranium quantitative “indirect uranium quantitative ” technology, uranium radium balance to be used, such as gas emission escape correction parameters to calibrate the uranium content. The relationship between natural radionuclides and characteristic gamma rays was analyzed. A “direct uranium quantification” method based on high-precision γ-ray logging and 234 mPa characteristic γ-ray (1.001 MeV) photoelectric peak or energy window was proposed. LaBr3 (Ce) -based gamma spectrometer was used to conduct model well experiments. The feasibility of the method was verified.