Geomechanical Characteristics of Hydrate-bearing Sands
AdvisorPriest, Jeffrey A.
Committee MemberHayley, Jocelyn L.
Clarkson, Christopher R.
Resonant column testing
Hydrate bearing sand
Hydrate bearing soils
Permeability of hydrates
MetadataShow full item record
AbstractThis thesis presents an experimental study on the geomechanical characteristics of lab-synthesized methane hydrate bearing sand. Sand was tested in four different states, namely, base sand (BS), frozen sand (FS), gas-saturated hydrate bearing sand (HS), and water-saturated hydrate bearing sand (WHS). Test specimens were evaluated for permeability, stiffness and triaxial strength. It was found that hydrate formation caused a reduction in permeability and a large increase in stiffness of sand. Triaxial test results indicate that both hydrate and ice increased the strength of sand and induced strain-softening behavior. However, HS showed higher peak strength than FS and exhibited different deformation characteristics. Stiffness and triaxial strength of WHS were lower than HS possibly due to marginal hydrate dissociation leading to a potential loss of cementation during water-saturation. The existence of inter-granular cementation in WHS was validated by analysis of experimental data using stress-dilatancy relationship for cohesive soils.
Showing items related by title, author, creator and subject.
Estimating Pore Space Hydrate Saturation Using Dissociation Gas Evolution Measurements: In Relevance to Laboratory Testing of Natural or Artificially Synthesised Hydrate-Bearing Soil Specimens Jayasinghe, Anuruddhika G.; Grozic, Jocelyn L. H. (2013-04-18)Physical properties of gas hydrate-bearing soils are known to be greatly affected by the pore space hydrate saturation. The accuracy of most saturation estimation methods is affected by hydrate growth habit and pore space ...
The Role of THF Hydrate Veins on the Geomechanical Behaviour of Hydrate-Bearing Fine Grained Soils Wu, JiechunNatural gas hydrate, which can form complex vein structures within fine-grained sediments, pose a significant geohazard if the hydrate were to dissociate. Therefore, understanding the role of hydrate veins on the geomechanical ...
Genesis and geometry of the Meiklejohn Peak lime mud-mound, Bare Mountain Quadrangle, Nevada, USA: Ordovician limestone with submarine frost heave structures- a possible response to gas clathrate hydrate evolution Krause, Federico F. (Elsevier, http://www.elsevier.com/wps/find/journal_browse.cws_home, University of Calgary, Science, 2001-12)