异常振幅衰减技术在多道地震数据处理中的应用

Application of anomalous amplitude noise attenuation in seismic data processing of multichannel survey line

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.

The high amplitude noise was common which was always caused by pass-by ship,and it was bad for the imaging of the profile. Anomalous amplitude attenuation technology was used to suppress the noise. By testing the parameters in different domains,with different median width of spatial median filter,time gates and thresholds,the noise was attenuated effectively. The result showed that the technology was useful which the S / N ratio was improved and the profile was better than that before processing which established a better basis for the future work.