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数字大地电磁测深仪是利用很弱的大地电磁场源作为信号进行地球物理勘探的数字化设备。仪器的灵敏高,可以分辨0.2％伽马的地磁脉动信号,对小信号的测量精度可达0.5％。此仪器可以用来研究地幔的电性构结,探测含油气构造,普查地热田以及通过监视地壳电阻率来预报天然地震等。中国石油天然气勘探开发公司仪器厂的SD-1型数字大地电磁测深仪从设计到研制成功花了六年的时间,先后经过了13次野外试验。
Digital terrestrial electromagnetic sounder is a digital device for geophysical exploration using a weak source of geomagnetic field as a signal. Instrument sensitive high, you can distinguish 0.2% gamma geomagnetic pulsation signal, the measurement accuracy of small signals up to 0.5%. This instrument can be used to study the electrical structure of the mantle, detect hydrocarbon-bearing structures, census geothermal fields, and predict natural earthquakes by monitoring crust resistivity. China National Petroleum Exploration and Development Company Instrument Factory SD-1 digital terrestrial electromagnetic sounder from the design to the successful development of spent six years, has gone through 13 field trials.