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我国南方碳酸盐岩区的静态效应非常频繁和明显 ,能否有效地压制静态效应是关系着大地电磁测深资料处理解释成败的一个关键问题。提出了一种比较有效的静态校正方法 ,其核心内容是利用地表出露地层和岩性电阻率标定视电阻率曲线的首支进而确定静态偏移量 ,并利用该偏移量去改正视电阻率曲线。经过 4 0多条测线共 70 0多个测点的实际应用 ,证明该方法是目前较为理想的静态校正方法。
The static effects of the carbonate rock area in the south of China are very frequent and obvious. Whether the static effect can be effectively suppressed is a key issue that explains the success or failure of MT data processing. A more effective static correction method is proposed. The core of this method is to calibrate the first branch of the apparent resistivity curve by using the surface exposed lithology and lithologic resistivity to determine the static offset, and to use the offset to correct the apparent resistance Rate curve. After the actual application of more than 70 measuring points over 40 measuring lines, this method is proved to be the ideal static correction method at present.