基于NMM随钻电磁波传输信道特性分析  

Analysis of EM-MWD channel based on NMM

作　　者：范业活[1,2] 李威[1] 聂在平[1] 杨志强[2] 孙向阳[1] 

机构地区：[1]电子科技大学,成都611731 [2]中国电波传播研究所,河南新乡453003

出　　处：《地球物理学报》2016年第3期1125-1130,共6页Chinese Journal of Geophysics

基　　金：国家自然科学基金项目(61231001)资助

摘　　要：基于数值模式匹配法(NMM)与源等效原理,建立了随钻电磁波传输理论模型,可以同时考虑介质的径向和轴向非均质性,便于分析套管、泥浆、高导层、高阻层对信号传输的影响.通过理论计算结果与试验结果对比,验证了理论模型的正确性.在此基础上对地层电阻率、工作频率、套管、泥浆、钻柱导电性、高导层和高阻层对信号传输的影响进行了计算分析.In this paper,a theoretical model of EM-MWD has been set up based on the numerical mode matching method（NMM）and source equivalent principle.This model can consider radial and axial heterogeneities,and facilitate analysis of effects of casing,mud,high-conductivity layers,and high resistivity layers on signal transmission.The correctness of this theoretical model has been proved by calculation and field test.The influences of formation resistivity,working frequency,casing,drilling mud,pillar,high conductivity layers and high resistivity layers on the signal transmission are analyzed.

关 键 词：电磁波随钻测量 数值模式匹配法 等效原理 信道 

分 类 号：P631[天文地球—地质矿产勘探]