| Abstract: | We use core porosity, consolidation experiments, pressure core sampler data, and capillary pressure measurements to predict water pressures that are 70% of the lithostatic stress, and gas pressures that equal the lithostatic stress beneath the methane hydrate layer at Ocean Drilling Program Site 997, Blake Ridge, offshore North Carolina. A 29-m-thick interconnected free-gas column is trapped beneath the low-permeability hydrate layer. We propose that lithostatic gas pressure is dilating fractures and gas is migrating through the methane hydrate layer. Overpressured gas and water within methane hydrate reservoirs limit the amount of free gas trapped and may rapidly export methane to the seafloor. |
| Genre: | Article |
| ProdID: | 70025365 |
| Citation Author: | Flemings, P. B.; Liu, X.; Winters, W. J. |
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| Citation End Page: | 1060 |
| Citation Issue: | 12 |
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| Citation Language: | English |
| Citation Larger Work Title: | Geology |
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| Citation Number Of Pages: | 4 |
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| Citation Search Results Text: | Critical pressure and multiphase flow in Blake Ridge gas hydrates; 2003; Article; Journal; Geology; Flemings, P. B.; Liu, X.; Winters, W. J. |
| Citation Start Page: | 1057 |
| Citation Volume: | 31 |
| Citation Year: | 2003 |
| Type: | citation/reference |
| Text: | Critical pressure and multiphase flow in Blake Ridge gas hydrates; 2003; Article; Journal; Geology; Flemings, P. B.; Liu, X.; Winters, W. J. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1130/G19863.1 |
| Date Other: | Wed, 1 Jan 2003 00:00 -0600 |
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