电磁传播电阻率测井的响应函数及其探测特性分析  

On Response Functions of the Electromagnetic Propagation Resistivity Logging and Its Investigating Characteristics

作　　者：邢光龙[1] 杨善德[1] 

机构地区：[1]吉林大学物理学院,吉林长春130023

出　　处：《测井技术》2004年第4期281-284,共4页Well Logging Technology

基　　金：国家自然科学基金资助课题 (编号 497742 4 1 )

摘　　要：利用电磁传播电阻率测井 (EPRL)仪器的响应函数系统地考察了其相位差Δ和幅度比S随不同地层电导率和仪器参数的变化规律。通过分析EPRL的探测特性 ,发现Δ能在较大范围的电导率和源频率内保持良好的探测灵敏度和分辨能力 ,而S的探测灵敏度和分辨率随电导率和源频率减小而迅速下降 ,极大地限制了它的应用范围。Based on the electromagnetic propagation resistivity logging(EPRL) response functions, studied is the relationship that phase shift ( Δ) and amplitude ratio (S) of EPRL vary with formation resistivity, source frequency and spacings between transmitter and receiver coils. It is found that the resolution and investigative sensitivity of Δ are higher within the wide range of formation resistivity and source frequency; but the S resolution power rapidly decreases while formation conductivity and source frequency reduce; so the applications of S are restricted by its investigating characteristics.

关 键 词：电磁传播电阻率测井 相位差 幅度比 响应函数 探测特性 

分 类 号：P631.325[天文地球—地质矿产勘探]