随钻电磁波传输理论模型与信道特性分析  

EM channel theory model and characteristics analysis for MWD

作　　者：范业活[1,2] 聂在平[1] 李天禄[2] 

机构地区：[1]电子科技大学,四川成都611731 [2]中国电波传播研究所,河南新乡453003

出　　处：《电波科学学报》2013年第5期909-914,共6页Chinese Journal of Radio Science

基　　金：国家自然科学基金项目(60931004)

摘　　要：为了促进国内随钻电磁波传输技术进步、仪器研发和推广,通过比较优选激励方式,并在此基础上进行理论研究.在均质等效传输线模型的基础上,结合分段均匀传输线理论建立理论模型,通过计算结果与现场试验结果比较,验证了模型的正确性.利用均质等效传输线模型计算分析信道特性,分析表明地层电阻率、钻柱单位长度的电阻、激励源频率是影响信号传输的主要因素.The theoretical research of electromagnetic measurement while driuing（EM-MWD） transmission can contribute to instrument development and promo tion. One driving mode is selected after comparing several types of driving mode. A theoretical model is set up based on the uniform medium transmission line model,combining the sub-transmission line theory. The correctness of this theoretical model is proved by theoretical calculation and field test. The channel characteristics is analyzed, and the analysis result shows that formation resistivity, unit resistance of drill pipe length and working frquency are the main factors affecting the signal transmission.

关 键 词：电磁波随钻测量 等效传输线模型 信道 

分 类 号：TN929.4[电子电信—通信与信息系统]