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Prestack shot-gather depth migration by a `rigid' flow of Gaussian wave packets

Duchkov, Anton; Andersson, Fredrik LU and Ojala, Rikard LU (2012) In Studia Geophysica et Geodaetica 56(1). p.83-106
Abstract (Swedish)
Abstract in Undetermined

We introduce a new method for prestack depth migration of seismic common-shot gathers.

The computational procedure follows standard steps of the reverse-time migration, i.e.,

downward continuation of the `source' and the `receiver' waveelds, followed by application

of an imaging condition (e.g. zero-lag cross-correlation of these elds). In our method we

rst nd a sparse data representation with a small number of Gaussian wave packets. We

then approximate the downward waveeld propagation (for the `source' and the `receiver'

elds) by a `rigid'

ow of these wave packets along seismic rays. In this case, the wave

packets are simply... (More)
Abstract in Undetermined

We introduce a new method for prestack depth migration of seismic common-shot gathers.

The computational procedure follows standard steps of the reverse-time migration, i.e.,

downward continuation of the `source' and the `receiver' waveelds, followed by application

of an imaging condition (e.g. zero-lag cross-correlation of these elds). In our method we

rst nd a sparse data representation with a small number of Gaussian wave packets. We

then approximate the downward waveeld propagation (for the `source' and the `receiver'

elds) by a `rigid'

ow of these wave packets along seismic rays. In this case, the wave

packets are simply translated and rotated according to the ray geometry. One advantage

with using Gaussian wave packets is that analytic formulas can be used for translation, rotation, and the application of the cross-correlation imaging condition. Moreover, they

allow more sparse representations than competing methods. In combination, this yields a

computationally and memory ecient migration procedure, as only few rays have to be

traced, and since it is cheap to compute the cross-correlation for the intersecting rays. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
seismic imaging, sparse representation, Gaussian wave packets, migration, beam
in
Studia Geophysica et Geodaetica
volume
56
issue
1
pages
83 - 106
publisher
Institute of Geophysics of the Academy of Science of the Czech Republic / Springer
external identifiers
  • wos:000301037400006
  • scopus:84857658259
ISSN
0039-3169
DOI
10.1007/s11200-010-0075-x
language
English
LU publication?
yes
id
31d17cea-7510-47ee-a0a0-82a6be093a3f (old id 2224435)
date added to LUP
2011-12-16 21:30:53
date last changed
2017-01-01 03:11:55
@article{31d17cea-7510-47ee-a0a0-82a6be093a3f,
  abstract     = {<b>Abstract in Undetermined</b><br/><br>
We introduce a new method for prestack depth migration of seismic common-shot gathers.<br/><br>
The computational procedure follows standard steps of the reverse-time migration, i.e.,<br/><br>
downward continuation of the `source' and the `receiver' waveelds, followed by application<br/><br>
of an imaging condition (e.g. zero-lag cross-correlation of these elds). In our method we<br/><br>
rst nd a sparse data representation with a small number of Gaussian wave packets. We<br/><br>
then approximate the downward waveeld propagation (for the `source' and the `receiver'<br/><br>
elds) by a `rigid' <br/><br>
ow of these wave packets along seismic rays. In this case, the wave<br/><br>
packets are simply translated and rotated according to the ray geometry. One advantage<br/><br>
with using Gaussian wave packets is that analytic formulas can be used for translation, rotation, and the application of the cross-correlation imaging condition. Moreover, they<br/><br>
allow more sparse representations than competing methods. In combination, this yields a<br/><br>
computationally and memory ecient migration procedure, as only few rays have to be<br/><br>
traced, and since it is cheap to compute the cross-correlation for the intersecting rays.},
  author       = {Duchkov, Anton and Andersson, Fredrik and Ojala, Rikard},
  issn         = {0039-3169},
  keyword      = {seismic imaging,sparse representation,Gaussian wave packets,migration,beam},
  language     = {eng},
  number       = {1},
  pages        = {83--106},
  publisher    = {Institute of Geophysics of the Academy of Science of the Czech Republic / Springer},
  series       = {Studia Geophysica et Geodaetica},
  title        = {Prestack shot-gather depth migration by a `rigid' flow of Gaussian wave packets},
  url          = {http://dx.doi.org/10.1007/s11200-010-0075-x},
  volume       = {56},
  year         = {2012},
}