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Effect of Clay Content on the Mechanical Properties of Hydrate-Bearing Sediments during Hydrate Production via Depressurization

Author

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  • Dongliang Li

    (Key Laboratory of Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
    Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China)

  • Zhe Wang

    (Key Laboratory of Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
    Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China
    Nano Science and Technology Institute, University of Science and Technology of China, Suzhou 215123, China)

  • Deqing Liang

    (Key Laboratory of Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
    Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China)

  • Xiaoping Wu

    (School of Earth & Space Science, University of Science and Technology of China, Hefei 230026, China
    CAS Center for Excellence in Comparative Planetology, Hefei 230026, China)

Abstract

The effects of sediments with different clay contents on the mechanical properties of hydrate deposits were studied using a high-pressure, low-temperature triaxial apparatus with in-situ synthesis, as well as the mechanical properties of self-developed hydrate sediments. Through multi-stage loading, triaxial compression tests were conducted by adding quartz sand with different clay contents as the sediment skeleton, and the stress–strain relationship of the shearing process and the strength of sediments with different clay contents were determined. Volumetric changes were also observed during shearing. The results show that the strength of hydrate sediments decreases with the increasing clay content of sediments; in the processes of depressurization and shearing, the hydrate samples exhibited obvious shear shrinkage, regardless of the sediment particle size.

Suggested Citation

  • Dongliang Li & Zhe Wang & Deqing Liang & Xiaoping Wu, 2019. "Effect of Clay Content on the Mechanical Properties of Hydrate-Bearing Sediments during Hydrate Production via Depressurization," Energies, MDPI, vol. 12(14), pages 1-14, July.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:14:p:2684-:d:247892
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    References listed on IDEAS

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    1. Dongliang Li & Qi Wu & Zhe Wang & Jingsheng Lu & Deqing Liang & Xiaosen Li, 2018. "Tri-Axial Shear Tests on Hydrate-Bearing Sediments during Hydrate Dissociation with Depressurization," Energies, MDPI, vol. 11(7), pages 1-12, July.
    2. Yanghui Li & Yongchen Song & Weiguo Liu & Feng Yu, 2012. "Experimental Research on the Mechanical Properties of Methane Hydrate-Ice Mixtures," Energies, MDPI, vol. 5(2), pages 1-12, January.
    3. Tae-Hyuk Kwon & Gye-Chun Cho, 2012. "Submarine Slope Failure Primed and Triggered by Bottom Water Warming in Oceanic Hydrate-Bearing Deposits," Energies, MDPI, vol. 5(8), pages 1-25, August.
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    Cited by:

    1. Zhao, Yapeng & Liu, Jiaqi & Sang, Songkui & Hua, Likun & Kong, Liang & Zeng, Zhaoyuan & Yuan, Qingmeng, 2023. "Experimental investigation on the permeability characteristics of methane hydrate-bearing clayey-silty sediments considering various factors," Energy, Elsevier, vol. 269(C).
    2. Zhao, Yapeng & Kong, Liang & Liu, Jiaqi & Sang, Songkui & Zeng, Zhaoyuan & Wang, Ning & Yuan, Qingmeng, 2023. "Permeability properties of natural gas hydrate-bearing sediments considering dynamic stress coupling: A comprehensive experimental investigation," Energy, Elsevier, vol. 283(C).

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