基于Contourlet系数相关性的地震噪声压制方法  

Seismic noise suppression method based on correlation of Contourlet coefficients

作　　者：王建花 王守东[3] 刘燕峰[3] 

机构地区：[1]中海油研究总院,北京100028 [2]海洋石油勘探国家工程实验室,北京100028 [3]中国石油大学(北京)油气资源与探测国家重点实验室,北京102249

出　　处：《中国海上油气》2016年第1期35-40,共6页China Offshore Oil and Gas

基　　金：国家重点基础研究发展规划(973计划)"南海深水区复杂地质结构地震采集基础理论研究(编号:2009CB219403)";海洋石油勘探国家工程实验室"斜缆采集地震数据分析与处理技术研究"部分研究成果

摘　　要：地震信号Contourlet变换的稀疏表达中,变换域关联系数具有较强的相关性,据此提出了一种基于Contourlet邻域系数相关性的自适应阈值地震去噪方法。该方法对每一点系数计算其邻域均方根振幅,利用这一点的系数值及其邻域均方根振幅计算其邻域系数相关性,根据邻域系数相关性自适应地确定阈值。数值模拟和实际资料的处理结果验证了本文方法的有效性,该方法在压制噪声的同时能够较好地保护有效信号。In seismic signal sparse expressions of Contourlet transform, the relevance coefficients in transform domain have strong correlation. An adaptive threshold denoising method based on the correlation of Contourlet neighborhood coefficients is put forward. The neighborhood root-mean-square amplitude coefficients for every point are calculated with the method, the correlation of Contourlet neighborhood coefficients are calculated using the coefficients of the point and neighborhood root-mean-square amplitude and then the threshold according to the correlation of neighborhood coefficients is adaptively determined in this method. Numerical simulation and actual data processing results show the effectiveness of the proposed method, which indicates that it can protect the effective signal in suppressing noise.

关 键 词：CONTOURLET变换 随机噪声 地震噪声压制 邻域系数相关性 自适应 

分 类 号：P631.44[天文地球—地质矿产勘探]