定向电磁波测井仪双倾斜线圈系结构研究  

Research on double tilted coils structure for directional electromagnetic wave logger

作　　者：解茜草[1,2] 孙超[1] 仵杰[2] 

机构地区：[1]西北工业大学,陕西西安710072 [2]西安石油大学,陕西西安710065

出　　处：《传感器与微系统》2016年第2期36-38,共3页Transducer and Microsystem Technologies

基　　金：国家科技重大专项项目(2011ZX05020-004-05);陕西省教育厅专项科研计划资助项目(11JK0783)

摘　　要：采用水平层状各向异性介质中的磁流源并矢Green函数数值模拟了倾斜线圈系随钻电磁波电阻率测井仪的电磁波传播特性。分析了采用倾斜线圈系时电压的幅值衰减和相位移,兼顾信号强度和定向方位信号敏感性两方面因素,理论上给出线圈系方位角和线圈倾角的选择方法。研究结果与现有两种国外定向随钻电磁波电阻率测井仪的参数一致,为国内定向测井仪器的研发和测井数据解释奠定理论基础。Electromagnetic wave propagation characteristics of measurement while drilling（ MWD）electromagnetic wave resistivity logger with tilted coil are simulated via magnetic-current-source dyadic Green＇s function for horizontally stratified anisotropic media. The amplitude-attenuation and phase-shift characteristics of tilted coil are analyzed,taking into account both signal strength and sensitivity of directional azimuth signal and selection method of azimuth and tilted angle of coil is presented. The research results is consistent with parameters of two kinds of foreign directional MWD electromagnetic wave resistivity logger and is valuable for the research and development of directional well logging instrument and logging data interpretation in China.

关 键 词：定向电磁波传播 倾斜线圈系 并矢Green函数 

分 类 号：P631[天文地球—地质矿产勘探]