基于时变双边滤波的海洋可控源电磁数据噪声压制方法研究

海洋可控源电磁(MCSEM)方法是一种低频电磁波海底勘探技术,海底噪声的存在往往对MCSEM后续反演解释造成比较严重的影响。本文对MCSEM噪声特点和传统双边滤波方法进行总结回顾,在传统双边滤波方法基础上根据MCSEM噪声特点提出时变双边滤波方法并应用到MCSEM数据处理中。通过对模拟数据和实际数据的处理,结果表明:时变双边滤波的方法能够较好地压制MCSEM噪声,尤其是中、远收发距区域的噪声干扰,提高了用于后续处理的MCSEM数据质量。

Marine controlled- source electromagnetic data de- noising method based on time- varying Bilateral Filtering

The marine controlled- source electromagnetic (MCSEM) method is a low frequency electromagnet- ic subsurface surveying technique． The existence of the seafloor noise often seriously influenced the MCSEM follow- up inversion and interpretation． In this paper， we reviewed the MCSEM noise characteristics and traditional Bilater- al Filtering method，and proposed time- varying Bilateral Filtering method on the basis of the traditional Bilateral Filtering method and MCSEM noise features，and applied this method into MCSEM data processing． Through the processing of synthetic model and field data，the result shows that the MCSEM noise can be well suppressed by the time- varying Bilateral Filtering method，especially for the middle- long and long offset area noise，which improved the MCSEM data quality for follow- up processing．