阿曼Amal区块地震数据中复杂多次波的分析与压制  

Analysis and suppression of complex multiples for land seismic data in Block Amal,Oman

作　　者：王学军 李虹 郭惠英 张占江 王伟 

机构地区：[1]东方地球物理公司研究院,河北涿州072751

出　　处：《石油地球物理勘探》2012年第6期894-900,1024+839,共7页Oil Geophysical Prospecting

摘　　要：本文以阿曼Amal区块陆上三维地震资料为例,介绍在地震数据处理中识别陆上多次波的几种方法,即从CMP道集数据的自相关、速度谱、叠加剖面、等时切片等多方面综合研究多次波的特征。在此基础上,在叠前选择聚束滤波方法压制多次波,改善速度谱的质量,确保能够获得一次反射波的速度;在叠后采用局域多道相干滤波法衰减残存的多次波,取得明显效果。Taking land 3D seismic data in Block Amal in Oman as an example,this paper mainly describes some methods for multiples recognition such as autocorrelations of CMP gather,velocity spectrum,stack section and time slices to study multiple characteristics.Based on the above discussion,we choose the beam-forming filtering to attenuate multiples in the pre-stack processing.In this way the quality of velocity spectrum is improved,and the velocity of primary reflection is obtained.In the post-stack stage,the local multi-traces coherent filtering method is used to attenuate remnant multiples.Application results of 3D seismic data in Block Amal in Oman prove the efficiency of the approach.

关 键 词：多次波 聚束滤波 局域相干滤波 迭代处理 成像 

分 类 号：P631[天文地球—地质矿产勘探]