最优化列阵滤波高分辨率去噪研究  

High-resolution noise suppression using optimized array filtering

作　　者：王晓华[1] 陈道宏[2] 万龙贵 

机构地区：[1]大庆石油学院,151400 [2]大庆石油管理局物探公司

出　　处：《石油地球物理勘探》1995年第5期702-710,共9页Oil Geophysical Prospecting

基　　金：国家自然科学基金;中国科学院资助;中国石油天然气总公司资助;大庆石油管理局联合资助

摘　　要：最优化列阵滤波理论是针对一级包含有效波和相干干扰波的多道记录信号而提出的。它通过对一组多道记录作列阵滤波处理，让相干干扰信号尽可能得到衰减，同时完好保存有效信号。这种滤波以最优化过程取代了混波过程去噪，使得信号在不降低分辨率的条件下压制相干噪声，提高信噪比。本文从理论和实际应用方面对该方法的高分辨率去噪特性进行了研究。其结果表明：无论是对叠后剖面还是对叠前道集记录，最优化列阵滤波既可达到高分辨率又可收到提高信噪比的效果。The theory of optimized array filtering is advanced to cope with the multi-channel seismic data which include effective wave and coherent noise. Array filter-ing is applied to multichannel seismic data, so that coherent noise is suppressed as much as possible while effective wave is preserved very well. In this filtering, noise elimination is achieved by optimization process instead of wave mixing process, so that coherent noise is suppressed to raise signal/noise ratio, without resolution damaged.High-resolution noise suppression is analysed theoretically and practically. It is shown that the optimized array filtering can achieve good resolution and high sig-nal/noise ratio of both stacked seismic section and prestack seismic gathers.

关 键 词：滤波 分辨率 信噪比 地震勘探 地震数据 

分 类 号：P631.443[天文地球—地质矿产勘探]