基于低能特征峰的自然伽玛能谱测井方法探讨及实践  

Discussion and Realization on Natural Gamma-ray Spectral Logging Using Low-energy Gamma-ray Characteristic Peaks

作　　者：佘冠军[1] 尹旺明[1] 汤彬[1] 

机构地区：[1]东华理工大学,江西抚州344000

出　　处：《核电子学与探测技术》2009年第6期1435-1438,1460,共5页Nuclear Electronics & Detection Technology

基　　金：国家高技术研究发展计划(863计划)项目(2007AA06Z111)资助

摘　　要：提出了一种新的自然伽玛能谱测井的方法,该方法仅探测低能伽玛射线,选定214Bi的609.3keV和208Tl的583.2keV特征峰分别作为铀道和钍道的计数窗口。采用HPGe伽玛谱仪对测井模型进行实验测量,获得的铀道、钍道测井曲线效果很好,验证了该方法的可行性,表明基于HPGe探头的铀矿伽玛测井研究前景诱人。A new natural gamma-ray spectral logging method measure is presented. In the method, only the low-energy portion of the natural gamma rays spectrum is detected, and the count windows for 238U, 208T1 separately selecting low-energy gamma-ray characteristic peaks, they are 609. 3keV of 214Bi for 238U, 583.2keV of 208Tl for 232Th. The feasibility of such a method is verified via detection of logging models with a HPGe spectrometer, logging profiles of U, Th from the spectra are presented and the accuracy is satisfactory. Experimentation indicates that this method can be applied to gamma ray logging and the HPGe detector becomes an attractive prospect in gamma-ray logging for uranium deposits

关 键 词：低能伽玛射线 特征峰 自然伽玛能谱测井 计数窗口 

分 类 号：P631[天文地球—地质矿产勘探]