地面瞬变电磁探测系统对比试验  

Ground transient electromagnetic system contrast test

作　　者：王杰[1] 张晓培[1] 牛建军[1] 杜立志[1] 

机构地区：[1]吉林大学建设工程学院,长春130026

出　　处：《地球物理学进展》2017年第6期2670-2676,共7页Progress in Geophysics

基　　金：国家高技术研究发展计划(863)重大项目"深部矿产资源勘探技术与装备"子课题"高灵敏度;宽频带电磁传感器关键技术"(SS2012AA063001)资助

摘　　要：为了检验自主研发的地面瞬变电磁探测系统(GPTEM)的稳定性和实际野外工作性能,在吉林省公主岭市附近开展了地面瞬变电磁探测系统与国外商业仪器系统各组成部分的全面对比试验.试验中,进行了两套仪器使用各自的常规装置展开单点传感器噪声对比、实测数据对比和整套仪器系统的稳定性和一致性对比.并在同一感应电动势-衰减时间(V-T)的坐标下考察两者的关断时间、感应电动势的幅值、曲线的光滑程度和衰减速率以及尾期信号的抗干扰度等硬性指标来衡量仪器的性能.试验分别进行了以下对比方案:(1)GPTEM和GDP-32Ⅱ传感器静态噪声对比;(2)GPTEM和GDP-32Ⅱ传感器实测数据对比;(3)GPTEM和GDP-32Ⅱ整套发射-接收系统性能对比.最后对GPTEM和GDP-32Ⅱ系统采集数据进行反演,并通过和测井资料对比,验证了采集结果的正确性.试验分析表明,自主研发的地面瞬变电磁探测系统具有稳定性较好、抗干扰能力强、对异常体具有较强的分辨能力等优点,已经达到和在某些方面已经优于国外同类产品的性能,能够很好胜任野外实际勘察工作.In order to test the performance of each component of independently developed ground transient electromagnetic system（ GPTEM） at field work,a series of comprehensive tests were conducted between the GPTEM system and foreign commercial equipment in Gongzhuling city,Jilin province. Several contrast tests had been carried out as follows：（ 1） comparison of the noise performance of the GPTEM and GDP-32 Ⅱ system;（ 2） comparison of measured data of the sensors of GPTEM and GDP-32Ⅱ system;（ 3） comparison of the complete set of transmitting-receiving system of the GPTEM and GDP-32 II. Finally, the data collected by GPTEM and GDP-32 Ⅱsystem were inversed,and further compared with hole logging to verify the correctness of the collected results.The experimental analysis shows that the ground transient electromagnetic system has achieved and in some respects has been superior to the performance of similar products abroad,and can be well qualified for field exploration work.

关 键 词：瞬变电磁法 GPTEM系统 传感器 对比试验 

分 类 号：P631[天文地球—地质矿产勘探]