In this research, we study high resistivity fractures found in unconsolidated clay sediments on
logging-while-drilling borehole resistivity images from Indian continental margin collected
during the National Gas Hydrate Program Expedition 01. These fractures, found at Sites 5, 6, 7,
and 10 are likely filled with natural gas hydrate. Gas hydrate is identified on borehole logs and
images as high resistivity responses without associated density increases or indications of free
gas. The local state of stress at the time of fracturing can be determined by fracture orientations.
In Holes 5A, 5B, 6A an 7A the gas hydrate-filled fractures have an aligned, preferred orientation
likely associated with a local stress regime. At Site 10, where 130 m of gas hydrate-filled
fractures were observed, fracturing is chaotic, likely due to high gas flux.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:BVAU.2429/1553 |
| Date | 07 1900 |
| Creators | Cook, Ann, Goldberg, David |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | text |
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