Joint transmission and reflection traveltime tomography using the fast sweeping method and the adjoint-state technique
We present a joint transmission and reflection traveltime tomography algorithm based on the Fast Sweeping Method and the adjoint-state technique. In contrast to classical ray based tomography, this algorithm utilizes a grid-based Eikonal equation solver to circumvent the non-linearity of conventiona...
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2012
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fthighwire:oai:open-archive.highwire.org:gji:188/2/570 2023-05-15T17:09:30+02:00 Joint transmission and reflection traveltime tomography using the fast sweeping method and the adjoint-state technique Huang, Jun-Wei Bellefleur, Gilles 2012-02-01 00:00:00.0 text/html http://gji.oxfordjournals.org/cgi/content/short/188/2/570 https://doi.org/10.1111/j.1365-246X.2011.05273.x en eng Oxford University Press http://gji.oxfordjournals.org/cgi/content/short/188/2/570 http://dx.doi.org/10.1111/j.1365-246X.2011.05273.x Copyright (C) 2012, Oxford University Press Seismology TEXT 2012 fthighwire https://doi.org/10.1111/j.1365-246X.2011.05273.x 2016-11-16T19:05:15Z We present a joint transmission and reflection traveltime tomography algorithm based on the Fast Sweeping Method and the adjoint-state technique. In contrast to classical ray based tomography, this algorithm utilizes a grid-based Eikonal equation solver to circumvent the non-linearity of conventional ray shooting and bending approaches in complex media. The adjoint-state technique is used to obtain the gradient of the objective function without the explicit estimation of the Fréchet derivative matrix, which is usually computationally prohibitive for large-scale problems. When combined with Huygens′s Principle, the tomographic inversion can simultaneously use direct and reflected arrivals to optimize a final velocity model, further mitigate the ambiguity of the inverse problem and reveal deeper structures not visible to transmission tomography alone. In this paper, we describe the theoretical basis of our algorithm, evaluate its performance on synthetic models, and then apply it to a 20 km long 2-D seismic survey acquired in the Mackenzie Delta, Northwest Territories of Canada. The subsurface at that location is characterized by a thick permafrost (600 m) comprising high- and low-velocity areas associated with thermokarst lakes. Our results show the potential of the joint tomography in characterizing multi-scale heterogeneous velocity structures within the permafrost. Text Mackenzie Delta Northwest Territories permafrost Thermokarst HighWire Press (Stanford University) Canada Mackenzie Delta ENVELOPE(-136.672,-136.672,68.833,68.833) Northwest Territories Geophysical Journal International 188 2 570 582 |
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Open Polar |
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HighWire Press (Stanford University) |
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fthighwire |
language |
English |
topic |
Seismology |
spellingShingle |
Seismology Huang, Jun-Wei Bellefleur, Gilles Joint transmission and reflection traveltime tomography using the fast sweeping method and the adjoint-state technique |
topic_facet |
Seismology |
description |
We present a joint transmission and reflection traveltime tomography algorithm based on the Fast Sweeping Method and the adjoint-state technique. In contrast to classical ray based tomography, this algorithm utilizes a grid-based Eikonal equation solver to circumvent the non-linearity of conventional ray shooting and bending approaches in complex media. The adjoint-state technique is used to obtain the gradient of the objective function without the explicit estimation of the Fréchet derivative matrix, which is usually computationally prohibitive for large-scale problems. When combined with Huygens′s Principle, the tomographic inversion can simultaneously use direct and reflected arrivals to optimize a final velocity model, further mitigate the ambiguity of the inverse problem and reveal deeper structures not visible to transmission tomography alone. In this paper, we describe the theoretical basis of our algorithm, evaluate its performance on synthetic models, and then apply it to a 20 km long 2-D seismic survey acquired in the Mackenzie Delta, Northwest Territories of Canada. The subsurface at that location is characterized by a thick permafrost (600 m) comprising high- and low-velocity areas associated with thermokarst lakes. Our results show the potential of the joint tomography in characterizing multi-scale heterogeneous velocity structures within the permafrost. |
format |
Text |
author |
Huang, Jun-Wei Bellefleur, Gilles |
author_facet |
Huang, Jun-Wei Bellefleur, Gilles |
author_sort |
Huang, Jun-Wei |
title |
Joint transmission and reflection traveltime tomography using the fast sweeping method and the adjoint-state technique |
title_short |
Joint transmission and reflection traveltime tomography using the fast sweeping method and the adjoint-state technique |
title_full |
Joint transmission and reflection traveltime tomography using the fast sweeping method and the adjoint-state technique |
title_fullStr |
Joint transmission and reflection traveltime tomography using the fast sweeping method and the adjoint-state technique |
title_full_unstemmed |
Joint transmission and reflection traveltime tomography using the fast sweeping method and the adjoint-state technique |
title_sort |
joint transmission and reflection traveltime tomography using the fast sweeping method and the adjoint-state technique |
publisher |
Oxford University Press |
publishDate |
2012 |
url |
http://gji.oxfordjournals.org/cgi/content/short/188/2/570 https://doi.org/10.1111/j.1365-246X.2011.05273.x |
long_lat |
ENVELOPE(-136.672,-136.672,68.833,68.833) |
geographic |
Canada Mackenzie Delta Northwest Territories |
geographic_facet |
Canada Mackenzie Delta Northwest Territories |
genre |
Mackenzie Delta Northwest Territories permafrost Thermokarst |
genre_facet |
Mackenzie Delta Northwest Territories permafrost Thermokarst |
op_relation |
http://gji.oxfordjournals.org/cgi/content/short/188/2/570 http://dx.doi.org/10.1111/j.1365-246X.2011.05273.x |
op_rights |
Copyright (C) 2012, Oxford University Press |
op_doi |
https://doi.org/10.1111/j.1365-246X.2011.05273.x |
container_title |
Geophysical Journal International |
container_volume |
188 |
container_issue |
2 |
container_start_page |
570 |
op_container_end_page |
582 |
_version_ |
1766065615245672448 |