表层相关多次波压制算法在CMP道集中的应用  

Surface-related multiple attenuation applied on CMP gathers

作　　者：刘仕友 马继涛[2] 孙万元 LIU Shiyou;MA Jitao;SUN Wanyuan(Zhanjiang Branch Company of CNOOC (China) Ltd., Zhanjiang 524057,China;Geophysics Department, College of Geophysics and Information Engineering, China University of Petroleum-Beijing, Changping, Beijing 102249,China)

机构地区：[1]中海石油(中国)有限公司湛江分公司,湛江524057 [2]中国石油大学(北京)地球物理学院,北京102249

出　　处：《物探化探计算技术》2020年第2期217-224,共8页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家科技重大专项(2016ZX05026-002-006)。

摘　　要：表层相关多次波压制是海洋地震数据处理中的一个必不可少的处理过程。这里讨论了表层相关多次波压制的一种效率更高的算法,将SRME应用于CMP道集中。该算法假设地下介质或地下介质局部为一维介质,在这种情况下,每个CMP道集可以视为一维介质采集得到的炮记录。对于一个真正的一维介质而言,所有采集得到的炮记录都是一样的,因此CMP道集的SRME算法可以在频率波数域通过简单向量相乘,而不是频率空间域的矩阵相乘的形式完成,从而会大大提高运算效率。模拟数据和实际数据的结果验证了本文方法的有效性。Surface-related multiple attenuation is one of the necessary processing procedures in marine seismic data processing.We have discussed a more efficient surface related multiple attenuation method,and apply the method in CMP gathers.The algorithm assumes that the medium underground is one dimensional,or at least the local part of the underground medium is one dimensional.A single CMP gather can be seen as a shot gather acquired from a real one dimensional medium under this assumption.For a real one dimensional medium,all the shot gathers are the same.Thus,for the CMP gather multiple prediction can be done by a simple scalar multiplication in wave-number domain,rather than a matrix multiplication.This can accelerate the computation efficient a lot.The synthetic data and real data results illustrate the feasibility of the method.

关 键 词：表层相关多次波压制 CMP道集 一维介质 计算效率 

分 类 号：P631.4[天文地球—地质矿产勘探]