Fine-scale gas distribution in marine sediments assessed from deep-towed seismic data
Abstract In the context of seismic imaging of gas/gas-hydrate systems, the fine-scale structure of subseabed gas-related reflections is assessed by taking advantage of the source signature of the deep-towed high-resolution SYSIF seismic device. We demonstrate the value of an original wavelet-based m...
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2014
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Online Access: | http://dx.doi.org/10.1093/gji/ggt497 http://academic.oup.com/gji/article-pdf/196/3/1466/33388505/ggt497.pdf |
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croxfordunivpr:10.1093/gji/ggt497 2024-04-28T08:05:13+00:00 Fine-scale gas distribution in marine sediments assessed from deep-towed seismic data Ker, S. Le Gonidec, Y. Marsset, B. Westbrook, G. K. Gibert, D. Minshull, T. A. 2014 http://dx.doi.org/10.1093/gji/ggt497 http://academic.oup.com/gji/article-pdf/196/3/1466/33388505/ggt497.pdf en eng Oxford University Press (OUP) Geophysical Journal International volume 196, issue 3, page 1466-1470 ISSN 1365-246X 0956-540X Geochemistry and Petrology Geophysics journal-article 2014 croxfordunivpr https://doi.org/10.1093/gji/ggt497 2024-04-09T07:54:58Z Abstract In the context of seismic imaging of gas/gas-hydrate systems, the fine-scale structure of subseabed gas-related reflections is assessed by taking advantage of the source signature of the deep-towed high-resolution SYSIF seismic device. We demonstrate the value of an original wavelet-based method and associated multiscale seismic attributes, applied to seismic data recently acquired on the western margin of the Arctic archipelago of Svalbard. From analysis in the wavelet domain, we recognize two types of gas-related reflections associated with submetre-scale distribution of gas. We identify a thin gas-charged layer associated with an apparent normal polarity reflection, and we detect gas patches associated with a reverse-polarity bright spot with frequency-dependent elastic properties at small seismic wavelengths. The results provide valuable information on the scale of features through which gas migrates and resolve ambiguities in the interpretation of the seismic data. Article in Journal/Newspaper Arctic Archipelago Arctic Svalbard Oxford University Press Geophysical Journal International 196 3 1466 1470 |
institution |
Open Polar |
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Oxford University Press |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Geochemistry and Petrology Geophysics |
spellingShingle |
Geochemistry and Petrology Geophysics Ker, S. Le Gonidec, Y. Marsset, B. Westbrook, G. K. Gibert, D. Minshull, T. A. Fine-scale gas distribution in marine sediments assessed from deep-towed seismic data |
topic_facet |
Geochemistry and Petrology Geophysics |
description |
Abstract In the context of seismic imaging of gas/gas-hydrate systems, the fine-scale structure of subseabed gas-related reflections is assessed by taking advantage of the source signature of the deep-towed high-resolution SYSIF seismic device. We demonstrate the value of an original wavelet-based method and associated multiscale seismic attributes, applied to seismic data recently acquired on the western margin of the Arctic archipelago of Svalbard. From analysis in the wavelet domain, we recognize two types of gas-related reflections associated with submetre-scale distribution of gas. We identify a thin gas-charged layer associated with an apparent normal polarity reflection, and we detect gas patches associated with a reverse-polarity bright spot with frequency-dependent elastic properties at small seismic wavelengths. The results provide valuable information on the scale of features through which gas migrates and resolve ambiguities in the interpretation of the seismic data. |
format |
Article in Journal/Newspaper |
author |
Ker, S. Le Gonidec, Y. Marsset, B. Westbrook, G. K. Gibert, D. Minshull, T. A. |
author_facet |
Ker, S. Le Gonidec, Y. Marsset, B. Westbrook, G. K. Gibert, D. Minshull, T. A. |
author_sort |
Ker, S. |
title |
Fine-scale gas distribution in marine sediments assessed from deep-towed seismic data |
title_short |
Fine-scale gas distribution in marine sediments assessed from deep-towed seismic data |
title_full |
Fine-scale gas distribution in marine sediments assessed from deep-towed seismic data |
title_fullStr |
Fine-scale gas distribution in marine sediments assessed from deep-towed seismic data |
title_full_unstemmed |
Fine-scale gas distribution in marine sediments assessed from deep-towed seismic data |
title_sort |
fine-scale gas distribution in marine sediments assessed from deep-towed seismic data |
publisher |
Oxford University Press (OUP) |
publishDate |
2014 |
url |
http://dx.doi.org/10.1093/gji/ggt497 http://academic.oup.com/gji/article-pdf/196/3/1466/33388505/ggt497.pdf |
genre |
Arctic Archipelago Arctic Svalbard |
genre_facet |
Arctic Archipelago Arctic Svalbard |
op_source |
Geophysical Journal International volume 196, issue 3, page 1466-1470 ISSN 1365-246X 0956-540X |
op_doi |
https://doi.org/10.1093/gji/ggt497 |
container_title |
Geophysical Journal International |
container_volume |
196 |
container_issue |
3 |
container_start_page |
1466 |
op_container_end_page |
1470 |
_version_ |
1797575392522928128 |