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A Geomechanical Model for Gas Hydrate Bearing Sediments Incorporating High Dilatancy, Temperature, and Rate Effects

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  • Bohan Zhou

    (Department of Civil and Environmental Engineering, Texas A&M University, 3136 TAMU, College Station, TX 77843, USA
    PowerChina Huadong Engineering Corporation Limited, Hangzhou 311122, China)

  • Marcelo Sanchez

    (Department of Civil and Environmental Engineering, Texas A&M University, 3136 TAMU, College Station, TX 77843, USA)

  • Luciano Oldecop

    (Instituto de Investigaciones Antisísmicas “Ing. Aldo Bruschi”, Facultad de Ingeniería, Universidad Nacional de San Juan, San Juan 5402, Argentina)

  • J. Carlos Santamarina

    (Earth Science and Engineering, King Abdullah University of Science and Technology, Thuwal 23955, Saudi Arabia)

Abstract

The geomechanical behavior of methane hydrate bearing sediments (MHBS) is influenced by many factors, including temperature, fluid pressure, hydrate saturation, stress level, and strain rate. The paper presents a visco-elastoplastic constitutive model for MHBS based on an elastoplastic model that incorporates the effect of hydrate saturation, stress history, and hydrate morphology on hydrate sediment response. The upgraded model is able to account for additional critical features of MHBS behavior, such as, high-dilatancy, temperature, and rate effects. The main components and the mathematical formulation of the new constitutive model are described in detail. The upgraded model is validated using published triaxial tests involving MHBS. The model agrees overly well with the experimental observations and is able to capture the main features associated with the behavior of MHBS.

Suggested Citation

  • Bohan Zhou & Marcelo Sanchez & Luciano Oldecop & J. Carlos Santamarina, 2022. "A Geomechanical Model for Gas Hydrate Bearing Sediments Incorporating High Dilatancy, Temperature, and Rate Effects," Energies, MDPI, vol. 15(12), pages 1-23, June.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:12:p:4280-:d:836388
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    References listed on IDEAS

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    1. Kuniyuki Miyazaki & Norio Tenma & Tsutomu Yamaguchi, 2017. "Relationship between Creep Property and Loading-Rate Dependence of Strength of Artificial Methane-Hydrate-Bearing Toyoura Sand under Triaxial Compression," Energies, MDPI, vol. 10(10), pages 1-15, September.
    2. Maria De La Fuente & Jean Vaunat & Héctor Marín-Moreno, 2021. "Modelling Methane Hydrate Saturation in Pores: Capillary Inhibition Effects," Energies, MDPI, vol. 14(18), pages 1-18, September.
    3. Li, Xiao-Sen & Xu, Chun-Gang & Zhang, Yu & Ruan, Xu-Ke & Li, Gang & Wang, Yi, 2016. "Investigation into gas production from natural gas hydrate: A review," Applied Energy, Elsevier, vol. 172(C), pages 286-322.
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