Image domain seismic interferometry for reverse time migration of OBS multiple reflections
- Kazuya Shiraishi (JAMSTEC)
- Document ID
- Society of Exploration Geophysicists
- 2016 SEG International Exposition and Annual Meeting, 16-21 October, Dallas, Texas
- Publication Date
- Document Type
- Conference Paper
- 2016. Society of Exploration Geophysicists
- Reverse-time, Ocean-bottom node, Crustal structure, Depth migration, Multiples
- 1 in the last 30 days
- 15 since 2007
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In a crustal-scale marine seismic survey with sparsely deployed ocean bottom seismographs (OBS), spatially continuous imaging with primary reflections is difficult for shallow reflectors, because the imaging area is limited to beneath each OBS. In order to obtain continuous reflection image along the whole survey line, seismic interferometry is a useful method to utilize the surface-related multiple reflection signals. In this study, image domain seismic interferometry is proposed as a direct imaging method of multiple reflections based on a reverse time migration principle. Compared to the general data domain seismic interferometry, synthesizing of the virtual source data for redatuming is not necessary before imaging, and the redatuming and the imaging are done simultaneously. The verification test of the image domain interferometry by applying to the OBS survey data in Nankai trough shows good result to obtain the continuous reflection image from sparse receivers and dense airgun shots. The direct depth migration technique will be useful for full wavefield imaging in the OBS survey by integrating the primary reflections and the multiple reflections.
Presentation Date: Tuesday, October 18, 2016
Start Time: 3:45:00 PM
Presentation Type: ORAL
|File Size||3 MB||Number of Pages||5|
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