Offshore Antarctic Peninsula Gas Hydrate Reservoir Characterization by Geophysical Data Analysis
A gas hydrate reservoir, identified by the presence of the bottom simulating reflector, is located offshore of the Antarctic Peninsula. The analysis of geophysical dataset acquired during three geophysical cruises allowed us to characterize this reservoir. 2D velocity fields were obtained by using t...
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ftrepec:oai:RePEc:gam:jeners:v:4:y:2010:i:1:p:39-56:d:10791 2024-04-14T08:04:16+00:00 Offshore Antarctic Peninsula Gas Hydrate Reservoir Characterization by Geophysical Data Analysis Maria Filomena Loreto Umberta Tinivella Flavio Accaino Michela Giustiniani https://www.mdpi.com/1996-1073/4/1/39/pdf https://www.mdpi.com/1996-1073/4/1/39/ unknown https://www.mdpi.com/1996-1073/4/1/39/pdf https://www.mdpi.com/1996-1073/4/1/39/ article ftrepec 2024-03-19T10:31:41Z A gas hydrate reservoir, identified by the presence of the bottom simulating reflector, is located offshore of the Antarctic Peninsula. The analysis of geophysical dataset acquired during three geophysical cruises allowed us to characterize this reservoir. 2D velocity fields were obtained by using the output of the pre-stack depth migration iteratively. Gas hydrate amount was estimated by seismic velocity, using the modified Biot-Geerstma-Smit theory. The total volume of gas hydrate estimated, in an area of about 600 km 2 , is in a range of 16 × 10 9 –20 × 10 9 m 3 . Assuming that 1 m 3 of gas hydrate corresponds to 140 m 3 of free gas in standard conditions, the reservoir could contain a total volume that ranges from 1.68 to 2.8 × 10 12 m 3 of free gas. The interpretation of the pre-stack depth migrated sections and the high resolution morpho-bathymetry image allowed us to define a structural model of the area. Two main fault systems, characterized by left transtensive and compressive movement, are recognized, which interact with a minor transtensive fault system. The regional geothermal gradient (about 37.5 °C/km), increasing close to a mud volcano likely due to fluid-upwelling, was estimated through the depth of the bottom simulating reflector by seismic data. BSR; CIGs; velocity model; gas estimate; bathymetry; tectonics; Antarctic Peninsula Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula RePEc (Research Papers in Economics) Antarctic The Antarctic Antarctic Peninsula |
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Open Polar |
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RePEc (Research Papers in Economics) |
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ftrepec |
language |
unknown |
description |
A gas hydrate reservoir, identified by the presence of the bottom simulating reflector, is located offshore of the Antarctic Peninsula. The analysis of geophysical dataset acquired during three geophysical cruises allowed us to characterize this reservoir. 2D velocity fields were obtained by using the output of the pre-stack depth migration iteratively. Gas hydrate amount was estimated by seismic velocity, using the modified Biot-Geerstma-Smit theory. The total volume of gas hydrate estimated, in an area of about 600 km 2 , is in a range of 16 × 10 9 –20 × 10 9 m 3 . Assuming that 1 m 3 of gas hydrate corresponds to 140 m 3 of free gas in standard conditions, the reservoir could contain a total volume that ranges from 1.68 to 2.8 × 10 12 m 3 of free gas. The interpretation of the pre-stack depth migrated sections and the high resolution morpho-bathymetry image allowed us to define a structural model of the area. Two main fault systems, characterized by left transtensive and compressive movement, are recognized, which interact with a minor transtensive fault system. The regional geothermal gradient (about 37.5 °C/km), increasing close to a mud volcano likely due to fluid-upwelling, was estimated through the depth of the bottom simulating reflector by seismic data. BSR; CIGs; velocity model; gas estimate; bathymetry; tectonics; Antarctic Peninsula |
format |
Article in Journal/Newspaper |
author |
Maria Filomena Loreto Umberta Tinivella Flavio Accaino Michela Giustiniani |
spellingShingle |
Maria Filomena Loreto Umberta Tinivella Flavio Accaino Michela Giustiniani Offshore Antarctic Peninsula Gas Hydrate Reservoir Characterization by Geophysical Data Analysis |
author_facet |
Maria Filomena Loreto Umberta Tinivella Flavio Accaino Michela Giustiniani |
author_sort |
Maria Filomena Loreto |
title |
Offshore Antarctic Peninsula Gas Hydrate Reservoir Characterization by Geophysical Data Analysis |
title_short |
Offshore Antarctic Peninsula Gas Hydrate Reservoir Characterization by Geophysical Data Analysis |
title_full |
Offshore Antarctic Peninsula Gas Hydrate Reservoir Characterization by Geophysical Data Analysis |
title_fullStr |
Offshore Antarctic Peninsula Gas Hydrate Reservoir Characterization by Geophysical Data Analysis |
title_full_unstemmed |
Offshore Antarctic Peninsula Gas Hydrate Reservoir Characterization by Geophysical Data Analysis |
title_sort |
offshore antarctic peninsula gas hydrate reservoir characterization by geophysical data analysis |
url |
https://www.mdpi.com/1996-1073/4/1/39/pdf https://www.mdpi.com/1996-1073/4/1/39/ |
geographic |
Antarctic The Antarctic Antarctic Peninsula |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula |
genre |
Antarc* Antarctic Antarctic Peninsula |
genre_facet |
Antarc* Antarctic Antarctic Peninsula |
op_relation |
https://www.mdpi.com/1996-1073/4/1/39/pdf https://www.mdpi.com/1996-1073/4/1/39/ |
_version_ |
1796300702123819008 |