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多道地震数据受过船干扰噪声影响,往往在测线炮集上发育高振幅噪声,这些噪声严重影响多道地震成像效果.针对测线噪声振幅异常高的特点,采用异常振幅衰减技术进行处理.通过对不同域、不同空间中值滤波宽度、不同时间窗口和不同门槛值处理效果的对比,确定最佳的参数组合并实现对渤海某多道地震测线高振幅噪声的有效去除.处理结果表明,经过异常振幅压制后的叠加剖面信噪比提高,剖面的品质得以提升,这为后面的工作奠定了基础.
Multi-channel seismic data are affected by the ship-borne noise, and often high-amplitude noise develops on the line-measuring gun sets, which seriously affect the multi-channel seismic imaging effects. Abnormal amplitude attenuation technique is adopted to deal with the abnormally high linear noise amplitude. By comparing the effect of processing different median filtering widths, different time windows and different thresholds in different domains and different spaces, the optimal parameter combination is determined and the high amplitude noise of a multi-channel seismic line in the Bohai Sea is effectively removed. The results show that , The signal to noise ratio of the superimposed profile after the abnormal amplitude suppression is improved, and the quality of the profile is improved, which lays the foundation for the following work.