地层元素测井中中子-伽马能谱解析理论和方法

Analytical Methods With Neutron-Gamma Ray Spectrometry From Formation Elements

对在模型中进行地层元素中子-伽马能谱测井实验中所得中子-伽马谱解析方法进行了研究,即对非弹伽马谱与俘获伽马谱解析方法进行了研究。理论上推导出分别用非弹谱和俘获谱求出地层元素质量分数的公式,得到了标准非弹伽马谱和标准俘获伽马谱,并在理论推导的基础上编制了相应的解谱程序。

The logging experiments and the analytical methods with neutron-gamma, ray spectra from simulative formation elements are studied in the model boreholes. Namely, the analytical methods are studied for inelastic and capturing Gamma ray spectra respectively. TH formulae of the quality fractions of the formation elements are derived theoretically by means of the inelastic and capturing Gamma ray spectra respectively. Two standard spectra of inelastic and caputuring Gamma ray are gained, and the analytical programme is composed based on the theoretically deriving.