| Abstract: | Bulk properties of gas hydrate-bearing sediment strongly depend on whether hydrate forms primarily in the pore fluid, becomes a load-bearing member of the sediment matrix, or cements sediment grains. Our compressional wave speed measurements through partially water-saturated, methane hydrate-bearing Ottawa sands suggest hydrate surrounds and cements sediment grains. The three Ottawa sand packs tested in the Gas Hydrate And Sediment Test Laboratory Instrument (GHASTLI) contain 38(1)% porosity, initially with distilled water saturating 58, 31, and 16% of that pore space, respectively. From the volume of methane gas produced during hydrate dissociation, we calculated the hydrate concentration in the pore space to be 70, 37, and 20% respectively. Based on these hydrate concentrations and our measured compressional wave speeds, we used a rock physics model to differentiate between potential pore-space hydrate distributions. Model results suggest methane hydrate cements unconsolidated sediment when forming in systems containing an abundant gas phase. |
| Genre: | Article |
| ProdID: | 70026773 |
| Citation Author: | Waite, W. F.; Winters, W. J.; Mason, D. H. |
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| Citation End Page: | 1207 |
| Citation Issue: | 8-9 |
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| Citation Language: | English |
| Citation Larger Work Title: | American Mineralogist |
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| Citation Number Of Pages: | 6 |
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| Citation Search Results Text: | Methane hydrate formation in partially water-saturated Ottawa sand; 2004; Article; Journal; American Mineralogist; Waite, W. F.; Winters, W. J.; Mason, D. H. |
| Citation Start Page: | 1202 |
| Citation Volume: | 89 |
| Citation Year: | 2004 |
| Type: | citation/reference |
| Text: | Methane hydrate formation in partially water-saturated Ottawa sand; 2004; Article; Journal; American Mineralogist; Waite, W. F.; Winters, W. J.; Mason, D. H. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Thu, 1 Jan 2004 00:00 -0600 |
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