OGS RESEARCH ON GAS HYDRATES

General aspects of gas hydrates

Gas hydrates are a solid phase composed of water and low-molecular-weight gases (predominantly methane) which form under conditions of low temperature, high pressure, and adequate gas concentrations, conditions that are common in the upper few hundred meters of rapidly accumulated marine sediments.

Gas hydrates in marine environments have been mostly detected from analysis of seismic reflection profiles, where they produce remarkable Bottom Simulating Reflectors (BSRs).

The importance of gas hydrates is mainly related to

• their enormous resource of natural gas
• their important role in sediment tectonics,
• their role on stability of continental margin
• their contribution on greenhouse gases

1.1 Theoretical model for gas hydrate- and free gas-bearing sediments

1.2 AVO at the BSR

1.3 Estimate of the potentiality of a reservoir

1.4 Pore pressure regime and gas-phase distribution. The South Shetland Margin (Antarctica) case study.

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3.1 Current

3.2 Past

4.1 Events

5.1 OGS People

6.1 Links

 

CONTACT

Umberta Tinivella

Istituto Nazionale di Oceanografia e di Geofisica Sperimentale – OGS
Borgo Grotta Gigante 42C
34010 Sgonico (TS)
Italy
Email: utinivella@ogs.trieste.it