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Influence of Error in Estimating Anisotropy Parameters on VTI Depth Imaging
Joint Authors
Moussavi Alashloo, S. Y.
Ghosh, D. P.
Bashir, Y.
Wan Ismail, W. Y.
Source
International Journal of Geophysics
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-05-15
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
Thin layers in sedimentary rocks lead to seismic anisotropy which makes the wave velocity dependent on the propagation angle.
This aspect causes errors in seismic imaging such as mispositioning of migrated events if anisotropy is not accounted for.
One of the challenging issues in seismic imaging is the estimation of anisotropy parameters which usually has error due to dependency on several elements such as sparse data acquisition and erroneous data with low signal-to-noise ratio.
In this study, an isotropic and anelliptic VTI fast marching eikonal solvers are employed to obtain seismic travel times required for Kirchhoff depth migration algorithm.
The algorithm solely uses compressional wave.
Another objective is to study the influence of anisotropic errors on the imaging.
Comparing the isotropic and VTI travel times demonstrates a considerable lateral difference of wavefronts.
After Kirchhoff imaging with true anisotropy, as a reference, and with a model including error, results show that the VTI algorithm with error in anisotropic models produces images with minor mispositioning which is considerable for isotropic one specifically in deeper parts.
Furthermore, over- or underestimating anisotropy parameters up to 30 percent are acceptable for imaging and beyond that cause considerable mispositioning.
American Psychological Association (APA)
Moussavi Alashloo, S. Y.& Ghosh, D. P.& Bashir, Y.& Wan Ismail, W. Y.. 2016. Influence of Error in Estimating Anisotropy Parameters on VTI Depth Imaging. International Journal of Geophysics،Vol. 2016, no. 2016, pp.1-6.
https://search.emarefa.net/detail/BIM-1106200
Modern Language Association (MLA)
Moussavi Alashloo, S. Y.…[et al.]. Influence of Error in Estimating Anisotropy Parameters on VTI Depth Imaging. International Journal of Geophysics No. 2016 (2016), pp.1-6.
https://search.emarefa.net/detail/BIM-1106200
American Medical Association (AMA)
Moussavi Alashloo, S. Y.& Ghosh, D. P.& Bashir, Y.& Wan Ismail, W. Y.. Influence of Error in Estimating Anisotropy Parameters on VTI Depth Imaging. International Journal of Geophysics. 2016. Vol. 2016, no. 2016, pp.1-6.
https://search.emarefa.net/detail/BIM-1106200
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1106200