Instantaneous polarization filtering focused on suppression of surface waves  

瞬时偏振滤波技术压制X分量中的面波(英文)

作　　者：芦俊[1] 王赟[1] 杨春颖[1] 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029

出　　处：《Applied Geophysics》2010年第1期88-97,100,共11页应用地球物理（英文版）

基　　金：supported by the National Natural Science Foundation of China (grant No.40574055);the National 973 Program (Grant No.2006CB202207);the Special Fund (Grant No.2008ZX05035-001-003,2008ZX05035-003-006HZ,2008ZX05008-006-004)

摘　　要：The different characteristics of polarization of body and Rayleigh waves make it possible to separate these two types of waves by their characteristics and suppress the latter.The moving time-window analysis often is used in polarization filtering but it is difficult to determine a suitable time-window length,resulting in some problems,such as complex eigenvalues and non-convergence.For overcoming these disadvantages,in this paper,we introduce the concept of complex-trace analysis and conduct de-noise processing to suppress undesirable surface waves by instantaneous polarization analysis in the case of horizontal and vertical component seismic recordings from the Hauinan coal mine.The performance of the method is illustrated by examples with synthetic and field data and its effectiveness to remove surface waves from multi-component seismic data is demonstrated.瑞雷面波与体波在偏振上的差异使得利用偏振特征分离这两种波场成为可能。为克服滑动时窗法在应用中存在的一些问题,本文将工程地震和天然地震信号分析中的复数道技术与瞬时偏振分析技术引进到能源领域多分量地震勘探转换波记录中的面波压制处理。理论模拟与野外实测数据的处理试验显示了较好的压制面波、保留有效信号的去噪效果,证明了该技术值得在多分量数据处理中推广应用。

关 键 词：Rayleigh waves POLARIZATION complex-trace instantaneous polarization analysis MULTI-COMPONENT 

分 类 号：P631.4[天文地球—地质矿产勘探]