Using a specially constructed Gas Hydrate Resonant Column (GHRC), the University of
Southampton explored different methods of hydrate synthesis and measured the properties of the
resulting sediments, such as shear wave velocity (Vs), compressional wave velocity (Vp) and their
respective attenuation measurements (Qs
-1 and Qp
-1). Two approaches were considered. The first
utilises an excess gas technique, where known water volume in the pore space dictates the quantity
of hydrate. The second approach uses a known quantity of methane gas within the water saturated
pore space to constrain the volume of hydrate. Results from the two techniques show that hydrates
formed in excess gas environments cause stiffening of the sediment structure at low concentrations
(3%), whereas, even at high concentrations of hydrate (40%) in excess water environments, only
moderate increase in stiffness was observed. Additionally, attenuation results show a peak in
damping at approximately 5% hydrate in excess gas tests, whereas in excess water tests, damping
continues to increase with increasing hydrate content in the pore space. By considering the results
from the two approaches, it becomes apparent that formation method has an influence on the
properties of the hydrate bearing sand, and must therefore influence the morphology of the hydrate
in the pore space.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:BVAU.2429/1738 |
| Date | 07 1900 |
| Creators | Kingston, Emily, Clayton, Chris R.I., Priest, Jeffery |
| 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 |
| Rights | Priest, Jeffrey |
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