The surface wave suppression using the second generation curvelet transform  

基于第二代Curvelet变换的面波压制(英文)

作　　者：郑静静[1] 印兴耀[1] 张广智[1] 武国虎 张作胜 

机构地区：[1]中国石油大学(华东)地球资源与信息学院,山东东营257061 [2]胜利物探公司国际部,山东东营257084

出　　处：《Applied Geophysics》2010年第4期325-335,399,400,共13页应用地球物理（英文版）

基　　金：the Natural Science Foundation(Grant No.40739908);National Basic Research Program of China(973 Program)(Grant No.2007CB209605).

摘　　要：In this paper,we develop a new and effective multiple scale and strongly directional method for identifying and suppressing ground roll based on the second generation curvelet transform.Making the best use of the curvelet transform＇s strong local directional characteristics,seismic frequency bands are transformed into scale data with and without noise.Since surface waves and primary reflected waves have less overlap in the curvelet domain,we can effectively identify and separate noise.Applying this method to prestack seismic data can successfully remove surface waves and,at the same time,protect the reflected events well,particularly in the low-frequency band.This indicates that the method described in this paper is an effective and amplitude-preserving method.针对面波能量强、频率低、视速度低等特点,本文提出了基于第二代Curvelet变换的多尺度、多方向分解的面波压制方法,充分利用Curvelet变换的多尺度、多方向功能,分离出含有面波的尺度和方向然后利用面波与有效波在Curvelet域基本不重叠的特性,进行信噪分离处理。这种方法在实际叠前地震数据的处理中,能够有效压制面波,同时较好地保护有效反射波,特别是反射波的低频分量。文中提出的基于第二代Curvelet变换的去面波方法是一种较好的保幅去噪方法。

关 键 词：Second generation curvelet transform multiscale strong directional characteristics surface wave removal 

分 类 号：P631.443[天文地球—地质矿产勘探]