Modeling the Mechanical Behavior of Gas Hydrate Bearing Sediments Based on Unified Hardening Framework
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Gas Hydrate Bearing Sediments (GHBS) are natural soil deposits that contain methane hydrate inside their pores and they have been considered as a potential energy resource. Deformation behavior and change in shear strength of sediments are not clearly understood on the occasion of methane hydrate production and its modeling poses great challenges. In this study, a new GHBS model based on unified hardening framework has been proposed with less and easily determined model parameters. This analytical model incorporates modified Cam-clay yield surface, plus the effect of hydrate saturation parameters to capture the mechanical behavior of GHBS. Comparisons of tri-axial compression tests with model simulations have been conducted to show the proposed model is able to predict the mechanical behavior of GHBS at different hydrate saturations and confinement conditions.
KeywordsConstitutive modeling Gas hydrate bearing sediments Unified hardening concept Shear strength Hydrate saturations
This work is financially supported by the project of National Natural Science Foundation of China (Grant No. 11572165) and the project of Natural Science Foundation of Shandong Province (Grant No. ZR2016AB18).
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Conflict of interest
The authors declare that they have no conflicts of interest.
- Collett TS (2002) Energy resource potential of natural gas hydrates. AABG Bull 86:1971–1992Google Scholar
- Liu F, Kou XY, Jiang MJ, Wu XF (2013) Triaxial shear strength of synthetic hydrate-bearing sediments. Chin J Geotech Eng 35:1565–1572Google Scholar
- Masui A, Haneda H, Ogata Y, Aoki K (2005) Effects of methane hydrate formation on shear strength of synthetic methane hydrate sediments. In: Proceeding of the fifteenth international offshore and polar engineering conference, Seoul, Korea, pp 364–369Google Scholar
- Masui A, Haneda H, Ogata Y, Aoki K (2007) Mechanical properties of sandy sediment containing marine gas hydrates in deep sea offshore Japan. J Manag 26:839–861Google Scholar
- Miyazaki K, Masui A, Sakamoto Y, Aoki K, Tenma N, Yamaguchi T (2011) Triaxial compressive properties of artificial methane-hydrate-bearing sediment. J Geophys Res Solid Earth 116:1–11Google Scholar
- Sultan N, Garziglia S (2011) Geomechanical constitutive modelling of gas-hydrate-bearing sediments. In: Proceedings of the 7th international conference on gas hydrates, Edinburgh, pp 1–11Google Scholar