基于构建虚同相轴压制地震层间多次波  

Seismic internal multiple attenuation based on constructing virtual events

作　　者：吴静[1] 吴志强[2] 胡天跃[1] 何玉华[2] 王璞[1] 闫桂京[2] 李琳[1] 

机构地区：[1]北京大学地球与空间科学学院,北京100871 [2]国土资源部青岛海洋地质研究所,青岛266071

出　　处：《地球物理学报》2013年第3期985-994,共10页Chinese Journal of Geophysics

基　　金：国家973计划(2013CB228602);国家729专项(南黄海海域油气资源普查);国家自然科学基金(40974066)资助

摘　　要：基于构建虚同相轴来估计层间多次波的方法是克希霍夫积分表示定理的一个延伸发展.本文通过构建虚地震同相轴巧妙地将散射点从地下移到了表面,利用表面的散射点来预测层间多次波.由于预测与实际地震记录中的层间多次波振幅存在偏差,采用了多道的L1范数匹配算法来实现真振幅的多次波压制.对简单模型和南黄海地质模型的数据处理实例验证了本文研究方法的正确性和有效性.The method of estimating internal multiple based on constructing virtual events is an extended result of Kirchhoff integral representation theorem. In this paper, the downward reflection point is shifted from subsurface to free surface skillfully by constructing virtual events, and then the internal multiple can be predicted simply by using surface scattering points without subsurface information. After estimation of multiple, a multi-channel L1 norm matching method is used to implement true amplitude multiple subtraction. In addition, the examples of seismic data processing results of a simple model and a South Yellow Sea geological model verify the accuracy and effectiveness of the method developed in this paper.

关 键 词：虚同相轴 层间多次波 多道L1范数 多次波压制 

分 类 号：P631[天文地球—地质矿产勘探]