共偏移距道集平面波叠前时间偏移与反偏移  

Common-offset plane-wave prestack time migration and demigration

作　　者：管路平[1,2] 唐亚勋[3] 王华忠[3] 

机构地区：[1]南京大学地球科学系,南京210093 [2]中国石化石油勘探开发研究院南京石油物探研究所,南京210014 [3]同济大学海洋与地球科学学院海洋地质国家重点实验室,上海200092

出　　处：《地球物理学报》2009年第5期1301-1309,共9页Chinese Journal of Geophysics

基　　金：国家973项目(2006CB202402);863项目(2006AA09Z323)资助

摘　　要：在Dubrulle提出的共偏移距道集频率波数域叠前时间偏移的基础上,提出了共偏移距道集频率波数域叠前时间偏移与反偏移一对共轭算子.讨论了该对算子的变孔径实现过程.并把该对共轭算子串连起来实现了叠前地震数据的规则化处理.指出最小二乘意义下的叠前地震数据规则化会得到更好的效果.v(z)介质模型和Marmousi模型的数值试验结果表明,方法理论正确、有效.Based on the common-offset prestack time migration in f-k domain given by Dubrulle, we deduce a pair of common-offset plane-wave prestack time migration operator and its reverse operator. The common-offset plane wave prestack time migration is carried out with a variable migration aperture in order to give a better imaging result. Further, the pair of the cross- conjugate operators is cascated to implement the seismic data regularization process. It is mentioned that the least-square seismic data regularization approach will greatly improve the numerical results. Numerical examples of the v（z） model and Marmousi model demonstrate that the approach is correct and effective.

关 键 词：共偏移距道集 叠前时间偏移 平面波偏移 反偏移 地震数据规则化 

分 类 号：P631[天文地球—地质矿产勘探]