Abstract
In-situ observation of gas hydrate formation and dissociation in hydrate-bearing sediments, and water-permeability measurements for the sediments have been performed by the apparatus combined proton nuclear magnetic resonance (1H NMR) and permeability measurement system, which we had originally designed. As a result of NMR measurement and analysis, it was found that hydrate growth make apparent pore size gradually smaller. On the other hand, hydrate dissociation is supposed to advance from water-hydrate interfaces, where apparent pore size becomes larger gradually. All the sediments used here have the same tendency of decreasing pore-size with changing water saturation due to hydrate formation and growth. NMR measurement for gas hydrate sediments has a great possibility in understanding the structure of pore spaces and the change in porosity and permeability during exploration and production stages.
| Original language | English |
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| Title of host publication | Proceedings of the 8th 2009 ISOPE Ocean Mining and Gas Hydrates Symposium, ISOPE OMS-2009 |
| Pages | 107-112 |
| Number of pages | 6 |
| Publication status | Published - 2009 Dec 1 |
| Externally published | Yes |
| Event | 8th 2009 ISOPE Ocean Mining and Gas Hydrates Symposium, ISOPE OMS-2009 - Chennai, India Duration: 2009 Sept 20 → 2009 Sept 24 |
Other
| Other | 8th 2009 ISOPE Ocean Mining and Gas Hydrates Symposium, ISOPE OMS-2009 |
|---|---|
| Country/Territory | India |
| City | Chennai |
| Period | 09/9/20 → 09/9/24 |
Keywords
- Formation and dissociation
- Gas hydrates
- NMR
- Permeability
- Porosity
- Sediment
ASJC Scopus subject areas
- Geotechnical Engineering and Engineering Geology
- Ocean Engineering