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Direct measurement of the interaction forces between sediment particles in gas hydrate reservoirs
YU Yanjiang1,2,3, LUO Qiang1, NING Fulong1, LU Hongfeng2,3, LIU Zhihui1, PENG Li1, WANG Dongdong1, SHI Haoxian2,3, LIU Zhichao1, DUAN Longchen1
(1.Faculty of Engineering, China University of Geosciences (Wuhan), Wuhan 430074, China;2.Guangzhou Marine Geological Survey of China Geological Survey, Guangzhou 510075, China;3.Natural Gas Hydrate Engineering Technology Center of China Geological Survey, Guangzhou 510075, China)
Abstract:
In this study, an apparatus to directly measure the interaction forces between sediment particles in gas hydrate reservoirs was developed, and the corresponding measurement methods and procedures were described. The effectiveness of the apparatus and methods were validated by comparing the measured adhesion forces in gas hydrate with that measured in water droplet, ice and tetrahydrofuran (THF) hydrate particles as reported in literature. Then, the frictional forces between ice or THF hydrate and sand particles from the sediments in the South China Sea were firstly measured using the apparatus. The results show that the friction behavior between the ice and sand particles is similar to that between the THF and sand particles, while the later is lower than that of the former under the condition of low loading. With the increase of loading, the measured frictions between THF hydrate and sand particles are close to that between the ice and sand particles, and the measured sliding friction coefficient is approximately of 0.6.
Key words:  clathrate hydrate  sand production  measurement apparatus  adhesion force  friction