大地电磁测深资料去噪方法应用研究

An application study of noise elimination for magnetotelluric sounding data

系统地研究了大地电磁测深中几种去噪处理方法的原理、实质及效果 ,并以一些MT实际勘探测点实例予以佐证。理论与实例证明不同方法各有其优点 ,但概括起来Robust估计效果优于常规处理方法 ,远参考处理效果优于Robust估计。在具体工作中 ,应当从实际具体情况出发 ,因地制宜 ,依据工区干扰背景与经济成本合理加以应用。

The principles and effects of some noise elimination methods used for processing magnetotelluric sounding data are compared and illustrated with real MT data.Theoretical and case studies show that each method has its own advantages.To sum up, robust estimation is superior to conventional least square method, and remote reference technique is better than robust estimation.In practice, noise elimination method should be chosen and rationally utilized according to the background noise level, conditions of data acquisition, and exploration cost.