相敏检波技术及其在复电阻率测井仪中的应用  

Phase-sensitive technology and its application in complex resistivity logging tool

作　　者：张爱娟[1] 童茂松[1] 张家举[1] 杨宵[1] 李佐[1] 

机构地区：[1]大庆钻探工程公司测井一公司

出　　处：《石油仪器》2009年第5期19-21,99-100,共3页Petroleum Instruments

基　　金：大庆石油管理局钻探事业部项目(B04006025);大庆石油管理局重大科研项目(DQKJZB200318)资助

摘　　要：电法测井仪器在进行信号检测时,需要得到与被测量信号的幅度成线性关系的直流信号,常用的手段就是相敏检波技术。在传统的电法测井仪器中,参考信号与测量信号之间存在变化的相位差,影响了测量结果。文章对传统的电法测井仪器中的相敏检波电路进行了完善,利用运算放大器的过零比较功能,实现了输入信号和参考信号的同频同相,并在复电阻率测井仪中得到了应用,提高了该仪器的测量精度和动态范围。For resistivity logging tools,the DC signal,whose amplitude is linearly related to that of the measured signal,should be obtained. The often used technology is the phase-sensitive detection. In traditional resistivity tools,the phase difference between the reference signal and the measured signal affects the logging results. In this paper,this phase-sensitive detecting technology is developed by using zero-crossing comparative method. The same frequency and phase of the reference and measured signals have been realized. The using of the developed phase-sensitive detecting method in complex resistivity logging tool enhances the measuring precision and dynamic range.

关 键 词：相敏检波 过零比较 复电阻率 测井仪器 

分 类 号：P631.811[天文地球—地质矿产勘探]