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《Journal of University of Science and Technology Beijing》 2007-06
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High-precision method of electromagnetic frequency spectrum and its application in mineral exploration

LI Zhong1), WU Qiang1), ZHOU Ren'an2), ZHANG Lijuan1)1) Resources & Safety Engineering School, China University of Mining and Technology, Beijing 100083, China2) Dian-Qian-Gui Bureau of Oil Exploration, Kunming 650200, China  
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.
【Fund】: 教育部科技重大项目(No.2004-295)
【CateGory Index】: P631.325
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