高精度电磁频谱技术及其在矿产勘探中的应用  

High-precision method of electromagnetic frequency spectrum and its application in mineral exploration

作　　者：李忠[1] 武强[1] 周仁安 张丽娟[1] 

机构地区：[1]中国矿业大学资源与安全工程学院,北京100083 [2]滇黔桂石油勘探局,昆明650200

出　　处：《北京科技大学学报》2007年第6期553-556,共4页Journal of University of Science and Technology Beijing

基　　金：教育部科技重大项目(No.2004-295)

摘　　要：基于大地电磁测深理论,阐述了高精度电磁频谱技术的方法原理,提出了在局部区域内勘探深度和电磁波频率可被看作具有线性关系,使得地层电阻率可以通过测深曲线进行对应.据此设计了一个多通道探测地下矿层电阻率的观测系统,采用平板电容器作为传感器,克服了体积效应的缺点,提高了勘探的精度.利用该系统分别对煤层和油气进行勘探,通过与实际钻孔资料对比,解释符合率大于80%,数据吻合良好.Based on the magnetotelluric （MT） theory, a technical law of high precision electromagnetic spectrum was illustrated. From comparative analysis of experiment, the exploring depth and the electromagnetic frequency could be regarded as a linear relation in local area, which made the stratum resistivity correspond to the exploring sounding curve. An observation system of underground coal seam resistivity using multi-channel exploring method was designed. As a sensor, the paralleled capacitor overcame the disadvantage of volume effectiveness and improved the exploring precision. The system is adopted to explore coal seam and oil-gas. In comparison with the practical drilling data, the accordance gives out a satisfied result with a figure of 80 % or more.

关 键 词：矿产勘探 电磁频谱 平板电容器 多通道探测 

分 类 号：P229.2[天文地球—大地测量学与测量工程]