摘要
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。
Uranium detection from natural γ-ray logging is an indirect method, because the uranium content must be corrected for influence factors from uranium-radium balance and radon escaping. In this article, relationship of the natural radio-nuclides and their characteristic gamma-rays is analyzed. A direct uranium quantitative detection method is proposed, based on high-precision γ-logging and the photoelectric-peak （or energy-window） from 234mpa γ-ray of 1.001 MeV. In standard-model well experiments using a γ-spectrum logging instrument developed in our laboratory, and a LaBr3（Ce） detector, feasibility of this new method is verified.
出处
《核技术》
CAS
CSCD
北大核心
2012年第10期745-750,共6页
Nuclear Techniques
基金
国家自然科学基金(41074078)
国家高技术研究发展计划(863计划:2012AA061804
2007AA06Z111)
国家其它基础科研计划(B3420110006)
关键词
自然Γ测井
放射性平衡
234mPa特征γ射线
直接铀定量
Natural γ-ray logging, Radioactive equilibrium, 234mpa Characteristic γ-ray, Direct uranium quantitativedetection
