文章基本信息
- 标题：Stretching correction for amplitude-preserving vector wavefield reverse-time migration
- 本地全文：下载
- 作者：Jia-jia Yang ; Bing-shou He ; Hua-ning Xu 等
- 期刊名称：China Geology
- 印刷版ISSN：2096-5192
- 出版年度：2019
- 卷号：2
- 期号：2
- 页码：179-188
- DOI：10.31035/cg2018071
- 语种：English
- 出版社：Elsevier
- 摘要：ABSTRACTThe migration of multi-wave seismic data is aimed at obtaining the P- and S-wave imaging results of the amplitude preserving. But the P- and S-wave stretching effect produced by the reverse time migration of the elastic wave equation will not only reduce the vertical resolution of the migration results and the amplitude preserving of the large reflection angle. In this paper, the reverse time migration technique of amplitude preserving vector wave-field separating is used. Based on the analysis of the stretch mechanism and the influencing factors of stretch magnitude, the paper gave the stretch correcting factors. Then, realize the stretch correction method at the time that after the reverse extrapolation and before the imaging by solving the problem which is how to calculate the P-wave and Ps-wave propagation directions of imaging points at different times. The stretch correction method can improve the vertical resolution and amplitude fidelity of the imaging results and provide high fidelity input data for seismic data interpretation and inversion.© 2019 China Geology Editorial Office.
- 关键词：KeywordsReverse-time migrationMulti-wave and multi-componentMigration stretch correctionAmplitude-preserving imagingSeismic migration imaging
