瞬变电磁法中接收线圈过渡过程分析  

Analysis of the receiving coil's transitional process in TEM

作　　者：党瑞荣[1] 赵文涛[1] 任志平[1] 

机构地区：[1]光电油气测井与检测教育部重点实验室(西安石油大学)

出　　处：《石油仪器》2009年第2期7-9,73,共3页Petroleum Instruments

基　　金：863计划资助(2007AA06Z217);中国石油天然气集团公司中青年创新基金资助(07E1013)

摘　　要：在瞬变电磁系统中,接收线圈是其关键部件,是获取信息的重要装置,接收线圈将直接影响到系统的整体性能。实际中由于发射线圈为感性负载且激励信号又是斜阶跃波,所以接收线圈存在过渡过程,且对测量二次场有较大影响。文章在接收线圈的等效电路基础上,分别计算推导了一次感应电压和二次感应电压的具体形式,分别分析了其在接收线圈中的固有过渡过程,最后总结了接收线圈固有的过渡过程对异常信号的影响规律,并就如何缩短线圈过渡过程对系统的影响给出了一些建议。In TEM systems,the receiving coil is the key section to obtain information,so it relates to overall system performance.While actually the receiving coil is inductive load and excitation signal is the slanting step wave,there is transitional process in receiving coil that have great influence on measuring the second field.Based on the equivalent circuit of receiving coil,the concrete forms of the first induced voltage and second induced voltage are deduced in this paper and the transitional process of the first induced voltage and second induced voltage are respectively analyzed,then the rule how transitional process influence measuring abnormal signal is concluded.At the end of this paper,some advice about how to eliminating the influence of transitional process are listed.

关 键 词：瞬变电磁法 接收线圈 过渡过程 感应电压 

分 类 号：P631.325[天文地球—地质矿产勘探]