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Micromechanical Investigation of Stress Relaxation in Gas Hydrate-Bearing Sediments Due to Sand Production

Author

Listed:
  • Eitan Cohen

    (Faculty of Civil and Environmental Engineering, Technion—IIT, Haifa 32000, Israel)

  • Assaf Klar

    (Faculty of Civil and Environmental Engineering, Technion—IIT, Haifa 32000, Israel
    Department of Civil Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
    On sabbatical leave from the Technion—IIT.)

  • Koji Yamamoto

    (Japan Oil, Gas and Metals National Corporation (JOGMEC), Tokyo 105-0001, Japan)

Abstract

Past experience of gas production from methane-hydrate-bearing sediments indicates that sand migration is a major factor restricting the production of gas from methane-hydrate reservoirs. One important geotechnical aspect of sand migration is the influence of grain detachment on the existing stresses. This paper focuses on understanding and quantifying the nature of this aspect using different approaches, with a focus on discrete element method (DEM) simulations of sand detachment from hydrate-bearing sand samples. The investigation in the paper reveals that sand migration affects isotropic and deviatoric stresses differently. In addition, the existence of hydrate moderates the magnitude of stress relaxation. Both of these features are currently missing from continuum-based models, and therefore, a new constitutive model for stress relaxation is suggested, incorporating the research findings. Model parameters are suggested based on the DEM simulations. The model is suitable for continuum mechanics-based simulations of gas production from hydrate reservoirs.

Suggested Citation

  • Eitan Cohen & Assaf Klar & Koji Yamamoto, 2019. "Micromechanical Investigation of Stress Relaxation in Gas Hydrate-Bearing Sediments Due to Sand Production," Energies, MDPI, vol. 12(11), pages 1-16, June.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:11:p:2131-:d:237162
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    Citations

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    Cited by:

    1. Li, Xiao-Yan & Hu, Heng-Qi & Wang, Yi & Li, Xiao-Sen, 2022. "Experimental study of gas-liquid-sand production behaviors during gas hydrates dissociation with sand control screen," Energy, Elsevier, vol. 254(PB).
    2. Siavash Honari & Ehsan Seyedi Hosseininia, 2021. "Particulate Modeling of Sand Production Using Coupled DEM-LBM," Energies, MDPI, vol. 14(4), pages 1-32, February.
    3. Guokun Yang & Tianle Liu & Hai Zhu & Zihan Zhang & Yingtao Feng & Ekaterina Leusheva & Valentin Morenov, 2022. "Heat Control Effect of Phase Change Microcapsules upon Cement Slurry Applied to Hydrate-Bearing Sediment," Energies, MDPI, vol. 15(12), pages 1-21, June.

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