核谱技术在地球化学测井中的应用

Application of Nuclear Spectrum Technique in Geochemical Well Logging

摘要: 核谱分析技术在地球化学测井仪器串(GLT)中得到了广泛应用.它通过测量地层自然γ射线、活化γ射线和瞬发中子俘获γ射线,进而取得Si、Ca、Fe、Al、S、U、Th、K、Ti 和Gd 等十种元素含量测井曲线,在通过闭合模型的软件可将元素含量测井曲线转换成地层矿物丰度测井曲线.这为地质学家评价沉积环境,正确认识储集层提供了可靠依据. The spectrum analysing technique is widely used in the Geochemical Logging Tool(GLT) recently.GLT measured the natural γ-rays,induced and prompted neutron—capture γ-raysto get the logs of concentration of ten main elements found in reservoir rocks,and through the use ofthe closed—modelling,the concentration of these elements can be derived mineral abundances.Itprovides a reliable way for geologists to evaluate the sedimentary environment and reservoirformation.

Abstract: The spectrum analysing technique is widely used in the Geochemical Logging Tool(GLT) recently.GLT measured the natural γ-rays,induced and prompted neutron—capture γ-raysto get the logs of concentration of ten main elements found in reservoir rocks,and through the use ofthe closed—modelling,the concentration of these elements can be derived mineral abundances.Itprovides a reliable way for geologists to evaluate the sedimentary environment and reservoirformation.