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.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
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)
关键词
矿产勘探
电磁频谱
平板电容器
多通道探测
mineral exploration
electromagnetic spectrum
paralleled capacitor
multi-channel exploring method
