摘要
在低信噪比地震资料处理中,压制线性干扰是其中的关键处理环节。传统的频率域线性干扰压制方法容易产生假频及蚯蚓化现象,为此,提出了一种基于Cadzow滤波法压制线性干扰的方法。该方法首先在时间空间域对地震数据进行线性变换,再依据Cadzow滤波法建立二维Hankel矩阵,然后对其运行奇异值分解,最后通过减秩的方法来压制线性干扰。理论模型和实际地震数据的应用表明,该方法可有效地去除线性噪声,保护有效波,明显地改善了叠前地震资料的信噪比。
In the low signal?to?noise ratio seismic data,linear interference suppression is one of the key processing chains.The tradition?al method of linear interference suppression in frequency domain tends to generate the phenomena of aliasing and earthworms.Therefore, the authors propose a filtering method based on Cadzow to suppress linear interference.Firstly,the seismic data will be transformed by linear function in the time?space domain.Secondly,according to the Cadzow filtering method,a two?dimensional Hankel matrix is crea?ted,and then singular value decomposition is run.Finally,by means of reducing the rank of matrix, linear interference is suppressed.The theoretical model and field data experiments show that the method can effectively remove linear noise and protect the effective wave,thus significantly improving the signal?to?noise ratio of pre?stack seismic data.
出处
《物探与化探》
CAS
CSCD
2015年第4期842-847,共6页
Geophysical and Geochemical Exploration
基金
中国石油天然气集团公司科学研究与技术开发项目(2011B-3706)
