Offset-domain common image gathers on wave equation assisted by attribute migration

被引：0
|
作者：
Liu G. [1 ]
Li H. [2 ]
Liu Y. [1 ]
Meng X. [1 ]
机构：
[1] School of Geophysics and Information Technology, China University of Geosciences (Beijing), Beijing
[2] Geophysical Prospecting Team of Shandong Bureau of Geology, Jinan, 250104, Shandong
来源：
Shiyou Diqiu Wuli Kantan/Oil Geophysical Prospecting | 2020年 / 55卷 / 03期
关键词：
Attribute migration; Common image gathers; Modulation; Wave equation migration;
D O I：
10.13810/j.cnki.issn.1000-7210.2020.03.016
中图分类号：
学科分类号：
摘要：
Seismic migration based on wave equation is more accurate than Kirchhoff-based migration,and the former is more sensitive to the accuracy of a velocity model.Therefore,instead of Kirchhoff depth migration,it is of important practical significance for velocity iteration of offset-domain common image gathers based on wave equation.A computation scheme based on attribute migration is proposed to analyze offset-domain common image gathers through wave equation migration.In other words,migration is done after modulating surface offset,then the ratio of the migration based on modulated offset to the migration based on original data is taken as the surface offset of an imaging point.By giving new migration to its corresponding offset,and calculating and stacking literately,the final result is surface offset gathers.In practice,the two kinds of migration are performed during the same migration circle,and the computing effort is only increased by 30% since only increasing the propagation of receiver wavefield.2D and 3D model and field data have proved the method effective. © 2020, Editorial Department OIL GEOPHYSICAL PROSPECTING. All right reserved.
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页码：607 / 615
页数：8
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