基于等效探测体积模型的自然伽马测井仪器响应分析  

Analysis of Natural Gamma Logging Tool Response Based on Equivalent-Detecting-Volume Model

作　　者：童茂松[1] 刘长伟[1] 冯维龙[1] 

机构地区：[1]大庆钻探工程公司测井公司,黑龙江大庆163412

出　　处：《测井技术》2014年第4期463-465,共3页Well Logging Technology

基　　金：大庆油田有限责任公司重大科技专项(DQC-2010-CS-KY-003)

摘　　要：建立了自然伽马测井等效探测体积模型,采用自然伽马刻度井测井数据对模型进行了验证,表明该模型可以有效计算自然伽马测井的理论响应。计算了不同长度、直径晶体自然伽马测井仪器的响应特征,分析了仪器的纵向分辨率与NaI晶体直径、长度的关系。自然伽马测井的响应幅度与地层厚度之间呈现较好的二次函数关系,纵向分辨率随晶体长度变化而线性变化。An equivalent-detecting-volume model was designed and then verified by the gamma ray （GR） logging in the calibration well.The results show that the model can be used to analyse the theoretic GR response.The response characteristics of GR logging tool with different lengths and crystal diameters are calculated.The relationship between vertical resolution of GR logging tool and NaI crystal diameter and length are investigated.Research results show better quadratic function relation between GR logging range and the layer thickness.The vertical resolution has linear change with crystal length.

关 键 词：自然伽马测井 高分辨率 等效探测体积模型 响应分析 

分 类 号：P631.83[天文地球—地质矿产勘探]