Energies 2011, 4(1), 39-56; doi:10.3390/en4010039
Article

Offshore Antarctic Peninsula Gas Hydrate Reservoir Characterization by Geophysical Data Analysis

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Received: 8 December 2010; in revised form: 21 December 2010 / Accepted: 24 December 2010 / Published: 31 December 2010
(This article belongs to the Special Issue Natural Gas Hydrate)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: 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 km2, is in a range of 16 × 109–20 × 109 m3. Assuming that 1 m3 of gas hydrate corresponds to 140 m3 of free gas in standard conditions, the reservoir could contain a total volume that ranges from 1.68 to 2.8 × 1012 m3 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.
Keywords: BSR; CIGs; velocity model; gas estimate; bathymetry; tectonics; Antarctic Peninsula
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MDPI and ACS Style

Loreto, M.F.; Tinivella, U.; Accaino, F.; Giustiniani, M. Offshore Antarctic Peninsula Gas Hydrate Reservoir Characterization by Geophysical Data Analysis. Energies 2011, 4, 39-56.

AMA Style

Loreto MF, Tinivella U, Accaino F, Giustiniani M. Offshore Antarctic Peninsula Gas Hydrate Reservoir Characterization by Geophysical Data Analysis. Energies. 2011; 4(1):39-56.

Chicago/Turabian Style

Loreto, Maria Filomena; Tinivella, Umberta; Accaino, Flavio; Giustiniani, Michela. 2011. "Offshore Antarctic Peninsula Gas Hydrate Reservoir Characterization by Geophysical Data Analysis." Energies 4, no. 1: 39-56.


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