Prestack shot-gather depth migration by a `rigid' flow of Gaussian wave packets
(2012) In Studia Geophysica et Geodaetica 56(1). p.83-106- Abstract
- 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.... (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:
https://lup.lub.lu.se/record/2224435
- author
- Duchkov, Anton ; Andersson, Fredrik LU and Ojala, Rikard LU
- organization
- publishing date
- 2012
- 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
- 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
- 2016-04-01 10:00:58
- date last changed
- 2022-01-25 18:55:01
@article{31d17cea-7510-47ee-a0a0-82a6be093a3f,
abstract = {{Abstract in Undetermined<br/>We introduce a new method for prestack depth migration of seismic common-shot gathers.<br/>The computational procedure follows standard steps of the reverse-time migration, i.e.,<br/>downward continuation of the `source' and the `receiver' waveelds, followed by application<br/>of an imaging condition (e.g. zero-lag cross-correlation of these elds). In our method we<br/>rst nd a sparse data representation with a small number of Gaussian wave packets. We<br/>then approximate the downward waveeld propagation (for the `source' and the `receiver'<br/>elds) by a `rigid'<br/>ow of these wave packets along seismic rays. In this case, the wave<br/>packets are simply translated and rotated according to the ray geometry. One advantage<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/>allow more sparse representations than competing methods. In combination, this yields a<br/>computationally and memory ecient migration procedure, as only few rays have to be<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}},
keywords = {{seismic imaging; sparse representation; Gaussian wave packets; migration; beam}},
language = {{eng}},
number = {{1}},
pages = {{83--106}},
publisher = {{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}},
doi = {{10.1007/s11200-010-0075-x}},
volume = {{56}},
year = {{2012}},
}