Dynamically Focused Gaussian Beams for Seismic Imaging
Author
Source
International Journal of Geophysics
Issue
Vol. 2011, Issue 2011 (31 Dec. 2011), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2011-05-26
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
An initial study is performed in which dynamically focused Gaussian beams are investigated for seismic imaging.
Focused Gaussian beams away from the source and receiver plane allow the narrowest and planar portions of the beams to occur at the depth of a specific target structure.
To match the seismic data, quadratic phase corrections are required for the local slant stacks of the surface data.
To provide additional control of the imaging process, dynamic focusing is investigated where all subsurface points are specified to have the same planar beam fronts.
This gives the effect of using nondiffracting beams, but actually results from the use of multiple focusing depths for each Gaussian beam.
However, now different local slant stacks must be performed depending on the position of the subsurface scattering point.
To speed up the process, slant stacking of the local data windows is varied to match the focusing depths along individual beams when tracked back into the medium.
The approach is tested with a simple model of 5-point scatterers which are then imaged with the data, and then to the imaging of a single dynamically focused beam for one shot gather computed from the Sigsbee2A model.
American Psychological Association (APA)
Nowack, Robert L.. 2011. Dynamically Focused Gaussian Beams for Seismic Imaging. International Journal of Geophysics،Vol. 2011, no. 2011, pp.1-8.
https://search.emarefa.net/detail/BIM-462924
Modern Language Association (MLA)
Nowack, Robert L.. Dynamically Focused Gaussian Beams for Seismic Imaging. International Journal of Geophysics No. 2011 (2011), pp.1-8.
https://search.emarefa.net/detail/BIM-462924
American Medical Association (AMA)
Nowack, Robert L.. Dynamically Focused Gaussian Beams for Seismic Imaging. International Journal of Geophysics. 2011. Vol. 2011, no. 2011, pp.1-8.
https://search.emarefa.net/detail/BIM-462924
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-462924