Preliminary Investigation of Wavefield Depth Extrapolation by Two-Way Wave Equations
Joint Authors
Gao, Jinghuai
Wu, Bangyu
Wu, Ru-Shan
Source
International Journal of Geophysics
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-06-13
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
Most of the wavefield downward continuation migration approaches are relying on one-way wave equations, which move the seismic energy always in one direction along depth.
The one-way downward continuation migrations only use the primaries for imaging and do not treat secondary reflections recorded on the surface correctly.
In this paper, we investigate wavefield depth extrapolators based on the full acoustic wave equations, which can propagate wave components to opposite directions.
Several two-way wavefield downward continuation propagators are numerically tested in this study.
Recursively implementing of the depth extrapolator makes it necessary and important to eliminate the unstable wave modes, that is, evanescent waves.
For the laterally varying velocity media, distinction between the propagating and evanescent wave mode is less clear.
We demonstrate that the spatially localized two-way beamlet propagator is an effective way to remove the evanescent waves while maintain the propagating mode in laterally inhomogeneous media.
American Psychological Association (APA)
Wu, Bangyu& Wu, Ru-Shan& Gao, Jinghuai. 2012. Preliminary Investigation of Wavefield Depth Extrapolation by Two-Way Wave Equations. International Journal of Geophysics،Vol. 2012, no. 2012, pp.1-11.
https://search.emarefa.net/detail/BIM-512181
Modern Language Association (MLA)
Wu, Bangyu…[et al.]. Preliminary Investigation of Wavefield Depth Extrapolation by Two-Way Wave Equations. International Journal of Geophysics No. 2012 (2012), pp.1-11.
https://search.emarefa.net/detail/BIM-512181
American Medical Association (AMA)
Wu, Bangyu& Wu, Ru-Shan& Gao, Jinghuai. Preliminary Investigation of Wavefield Depth Extrapolation by Two-Way Wave Equations. International Journal of Geophysics. 2012. Vol. 2012, no. 2012, pp.1-11.
https://search.emarefa.net/detail/BIM-512181
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-512181