电性源地-井瞬变电磁法三分量响应特征分析  

Analysis of three component TEM response characteristic of electric source dill hole TEM

作　　者：武军杰[1,2] 李貅[1] 智庆全 戚志鹏[1] 郭建磊[1] 邓晓红[2] 

机构地区：[1]长安大学地质工程与测绘学院,西安710054 [2]中国地质科学院地球物理地球化学勘查研究所,廊坊065000

出　　处：《地球物理学进展》2017年第3期1273-1278,共6页Progress in Geophysics

摘　　要：地-井瞬变电磁法是在地面发射,井(钻孔)中接收的装置形式,能够利用已有钻孔使接收探头深入地下更加接近矿体,获得更加可靠的目标体信息.文中针对复杂地形地区矿区深部找矿面临的实际问题,提出了电性源地-井瞬变电磁法的思路,并以FDTD正演模拟来研究均匀半空间瞬变场的空间分布以及一维、三维模型钻孔中的三分量瞬变响应特征,以期获得理论模型三分量响应特征规律,为实际勘查提供参考.理论模型计算结果表明,电性源地-井TEM方法三分量瞬变响应曲线对于电性界面、异常体具有良好的反应.Surface to Borehole TEM is the configuration that transmitter put on the ground and the receive response in borehole.With this configuration receiver probe can be put near to ore body along the borehole and gain more reliable information of ore body.However,little research results have been reported at this point concerning the electric source borehole TEM method. The purpose of this paper is through the study of the borehole TEM response characteristics to provide technical support for the application.Three component response spatial distribution characteristics of half space,1D and 3D model were analyzed through forward modeling,and its validity for different models was proved in this paper.Results show that the characteristic of TEM response curves is effective to the interface and conductive body. The application of this technology may provide support for the deep prospecting in the mining area.

关 键 词：瞬变电磁 地-井装置 三分量响应 电性源 

分 类 号：P631[天文地球—地质矿产勘探]