Journal
JOURNAL OF NATURAL GAS CHEMISTRY
Volume 19, Issue 3, Pages 246-250Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S1003-9953(09)60073-6
Keywords
triaxial; mechanical properties; confining pressure; temperature; strain rate
Funding
- National Science and Technology Major Project, China [2008ZX050 26-04-010]
- National High Technology Research and Development Program of China [2006AA09A209-5]
- National Natural Science Foundation of China [50736001]
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Methane production from hydrate reservoir may induce seabed slide and deformation of the hydrate-bearing strata. The research on mechanical properties of methane hydrate is considered lobe important for developing an efficient methane exploitation technology. In this paper, a triaxial test system containing a pressure crystal device was developed with the conditions to stabilize the hydrate. A series of triaxial shear tests were carried out on artificial methane hydrate specimen. In addition, mechanical characteristics of methane hydrate were studied with the strain rates of 0.1 and 1.0 min/min, respectively, under the conditions of different temperatures (T = 5, 10, and -20 degrees C) and confining pressures (P = 0, 5, 10, 15, and 20 MPa). The preliminary results show that when the confining pressure was less than 10 MPa, the increase of confining pressure leaded to the enhancement of shear strength. Furthermore, the decreasing temperature and the increasing strain rate both caused the increase in shear strength.
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