OBS Data Analysis to Quantify Gas Hydrate and Free Gas in the South Shetland Margin (Antarctica)
The presence of a gas hydrate reservoir and free gas layer along the South Shetland margin (offshore Antarctic Peninsula) has been well documented in recent years. In order to better characterize gas hydrate reservoirs, with a particular focus on the quantification of gas hydrate and free gas and th...
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ftmdpi:oai:mdpi.com:/1996-1073/11/12/3290/ 2023-08-20T04:00:51+02:00 OBS Data Analysis to Quantify Gas Hydrate and Free Gas in the South Shetland Margin (Antarctica) Sha Song Umberta Tinivella Michela Giustiniani Sunny Singhroha Stefan Bünz Giorgio Cassiani 2018-11-25 application/pdf https://doi.org/10.3390/en11123290 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/en11123290 https://creativecommons.org/licenses/by/4.0/ Energies; Volume 11; Issue 12; Pages: 3290 gas hydrate free gas ocean-bottom seismometer PS-converted wave travel time tomography South Shetland margin Text 2018 ftmdpi https://doi.org/10.3390/en11123290 2023-07-31T21:51:51Z The presence of a gas hydrate reservoir and free gas layer along the South Shetland margin (offshore Antarctic Peninsula) has been well documented in recent years. In order to better characterize gas hydrate reservoirs, with a particular focus on the quantification of gas hydrate and free gas and the petrophysical properties of the subsurface, we performed travel time inversion of ocean-bottom seismometer data in order to obtain detailed P- and S-wave velocity estimates of the sediments. The P-wave velocity field is determined by the inversion of P-wave refractions and reflections, while the S-wave velocity field is obtained from converted-wave reflections received on the horizontal components of ocean-bottom seismometer data. The resulting velocity fields are used to estimate gas hydrate and free gas concentrations using a modified Biot-Geertsma-Smit theory. The results show that hydrate concentration ranges from 10% to 15% of total volume and free gas concentration is approximately 0.3% to 0.8% of total volume. The comparison of Poisson’s ratio with previous studies in this area indicates that the gas hydrate reservoir shows no significant regional variations. Text Antarc* Antarctic Antarctic Peninsula Antarctica MDPI Open Access Publishing Antarctic Antarctic Peninsula Energies 11 12 3290 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
gas hydrate free gas ocean-bottom seismometer PS-converted wave travel time tomography South Shetland margin |
spellingShingle |
gas hydrate free gas ocean-bottom seismometer PS-converted wave travel time tomography South Shetland margin Sha Song Umberta Tinivella Michela Giustiniani Sunny Singhroha Stefan Bünz Giorgio Cassiani OBS Data Analysis to Quantify Gas Hydrate and Free Gas in the South Shetland Margin (Antarctica) |
topic_facet |
gas hydrate free gas ocean-bottom seismometer PS-converted wave travel time tomography South Shetland margin |
description |
The presence of a gas hydrate reservoir and free gas layer along the South Shetland margin (offshore Antarctic Peninsula) has been well documented in recent years. In order to better characterize gas hydrate reservoirs, with a particular focus on the quantification of gas hydrate and free gas and the petrophysical properties of the subsurface, we performed travel time inversion of ocean-bottom seismometer data in order to obtain detailed P- and S-wave velocity estimates of the sediments. The P-wave velocity field is determined by the inversion of P-wave refractions and reflections, while the S-wave velocity field is obtained from converted-wave reflections received on the horizontal components of ocean-bottom seismometer data. The resulting velocity fields are used to estimate gas hydrate and free gas concentrations using a modified Biot-Geertsma-Smit theory. The results show that hydrate concentration ranges from 10% to 15% of total volume and free gas concentration is approximately 0.3% to 0.8% of total volume. The comparison of Poisson’s ratio with previous studies in this area indicates that the gas hydrate reservoir shows no significant regional variations. |
format |
Text |
author |
Sha Song Umberta Tinivella Michela Giustiniani Sunny Singhroha Stefan Bünz Giorgio Cassiani |
author_facet |
Sha Song Umberta Tinivella Michela Giustiniani Sunny Singhroha Stefan Bünz Giorgio Cassiani |
author_sort |
Sha Song |
title |
OBS Data Analysis to Quantify Gas Hydrate and Free Gas in the South Shetland Margin (Antarctica) |
title_short |
OBS Data Analysis to Quantify Gas Hydrate and Free Gas in the South Shetland Margin (Antarctica) |
title_full |
OBS Data Analysis to Quantify Gas Hydrate and Free Gas in the South Shetland Margin (Antarctica) |
title_fullStr |
OBS Data Analysis to Quantify Gas Hydrate and Free Gas in the South Shetland Margin (Antarctica) |
title_full_unstemmed |
OBS Data Analysis to Quantify Gas Hydrate and Free Gas in the South Shetland Margin (Antarctica) |
title_sort |
obs data analysis to quantify gas hydrate and free gas in the south shetland margin (antarctica) |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2018 |
url |
https://doi.org/10.3390/en11123290 |
geographic |
Antarctic Antarctic Peninsula |
geographic_facet |
Antarctic Antarctic Peninsula |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica |
op_source |
Energies; Volume 11; Issue 12; Pages: 3290 |
op_relation |
https://dx.doi.org/10.3390/en11123290 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/en11123290 |
container_title |
Energies |
container_volume |
11 |
container_issue |
12 |
container_start_page |
3290 |
_version_ |
1774720815084863488 |