电性源短偏移距瞬变电磁研究进展  

Review on research of short-offset transient electromagnetic method

作　　者：薛国强[1,2,3] 陈卫营 武欣[1,2,3] 郭文波 岳建华 于景邨[5] XUE Guoqiang;CHEN Weiying;WU Xin;GUO Wenbo;YUE Jianhua;YU Jingcun(Key Laboratory of Mineral Resources,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;Innovation Academy for Earth Science,Chinese Academy of Sciences,Beijing 100029,China;Xi'an Northwest Non-ferrous Geophysical and Chemical Exploration Group Co.,Ltd,Xi'an,Shaanxi 710068,China;School of Resources and Geosciences,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China)

机构地区：[1]中国科学院矿产资源研究重点实验室,中国科学院地质与地球物理研究所,北京100029 [2]中国科学院大学地球与行星科学学院,北京100049 [3]中国科学院地球科学研究院,北京100029 [4]西安西北有色物化探总队有限公司,陕西西安710068 [5]中国矿业大学地球科学学院,江苏徐州221116

出　　处：《中国矿业大学学报》2020年第2期215-226,共12页Journal of China University of Mining & Technology

基　　金：中国科学院装备研制项目(YJKYYQ20190004);国家自然科学基金项目(41704076,41830101);中国博士后科学基金项目(2019M660043)。

摘　　要：电性源短偏移距瞬变电磁法(SOTEM)是近些年发展起来的一种大深度瞬变电磁探测装置,在深部煤田水文地质调查等领域已表现出巨大潜力.本文通过回顾SOTEM方法的研究历史,总结SOTEM在正演模拟、反演成像、施工方法、附加效应、仪器设备等方面的研究现状,并结合实际应用案例论证了SOTEM在深部探测中的优越性.研究结果表明:SOTEM相较于传统回线源装置具有更大的探测深度,可以达到2000 m左右;相对于传统的长偏移瞬变电磁法,收发距可缩小至1/6,精度提高1.5倍,SOTEM通过观测不同电磁场分量可以实现对高、低阻目标体的精准探测;地面SOTEM可以扩展为地-井SOTEM和地-空SOTEM装置,分别提高探测精度和探测效率,以适用于不同场景的探测.Short-offset transient electromagnetic method(SOTEM)is a newly-developed kind of TEM device for deep exploration in recent years,which has shown great potential in the field of deep coalfield hydrogeological survey and the others.In this paper,the advantages of SOTEM method were demonstrated by reviewing the research history of SOTEM method,summarizing the research status in forward modeling,inversion,field working,additional effect and equipments,and analyzing a case history.The results showed that SOTEM has a better performance at greater depths(about 2000 m)than the conventional loop source TEM.The transceiver distance of SOTEM is reduced to one sixth of that of the traditional long offset TEM,and the accuracy is increased by 1.5 times.Both the conductive and resistive targets can be well detected by SOTEM by observing different electromagnetic field components.The surface SOTEM can be extended to surface-borehole and ground-airborne SOTEM devices to improve the detection accuracy and efficiency for different scenarios.

关 键 词：煤田水文地质 瞬变电磁法 回线源 电性源 短偏移距 

分 类 号：P631.325[天文地球—地质矿产勘探]