Geomechanical constitutive modelling of gas hydrate-bearing sediments by a state-dependent multishear bounding surface model

被引:21
作者
Fang, Huolang [1 ]
Shi, Kenan [1 ]
Yu, Yang [2 ]
机构
[1] Zhejiang Univ, Coll Civil Engn & Architecture, 866 Yuhangtang Rd, Hangzhou 310058, Peoples R China
[2] Zhejiang Univ, Ocean Coll, 1 Zheda Rd, Zhoushan 316021, Zhejiang, Peoples R China
基金
中国国家自然科学基金; 美国国家科学基金会;
关键词
Gas hydrate; Mechanical behavior; Constitutive model; Dilatancy; Collapse deformation; METHANE-HYDRATE; MECHANICAL-PROPERTIES; MICROPLANE MODEL; SAND; BEHAVIOR; DISSOCIATION; STRENGTH; STABILITY; STIFFNESS; STRAIN;
D O I
10.1016/j.jngse.2019.103119
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Natural gas hydrate in marine sediments and permafrost areas is considered as an important potential energy source. Since hydrate dissociation will reduce the stability of gas hydrate-bearing sediments (GHBS) and may cause wellbore failures and geological disasters during gas production, it is necessary to reveal the mechanical behavior of GHBS for the safe exploitation of natural gas hydrate. This paper proposes a geomechanical constitutive model of GHBS within the multishear bounding surface framework. Following the slip theory of plasticity, a constitutive formulation is obtained by splitting the macro constitutive response of sediments into a macro volume response and a series of micro shear responses in spatial distributions related to virtual microshear structures. Each microshear structure describes micro shear and dilatancy responses in three orthogonal orientations. A micro stress-strain relationship and a micro stress-dilatancy relationship are established for each orientation of the microshear structure. The model comprehensively describes the consolidation, hardening, softening, dilatation, collapse, and non-coaxial characteristics of gas hydrate-bearing sediments by introducing the multishear concept, state parameter, evolution law of hydrate bonding and debonding, and collapse strain caused by hydrate dissociation. The effectiveness of the model is confirmed by simulating the available published laboratory tests on the samples of synthetic and natural GHBS under different pore pressures, temperatures, initial void ratios, hydrate saturations, and initial effective confining stresses.
引用
收藏
页数:19
相关论文
共 50 条
  • [1] A state-dependent subloading constitutive model with unified hardening function for gas hydrate-bearing sediments
    Fang, Huolang
    Shi, Kenan
    Yu, Yang
    INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2022, 47 (07) : 4441 - 4471
  • [2] A State-Dependent Constitutive Model for Gas Hydrate-Bearing Sediments Considering Cementing Effect
    Yuan, Qingmeng
    Kong, Liang
    Xu, Rui
    Zhao, Yapeng
    JOURNAL OF MARINE SCIENCE AND ENGINEERING, 2020, 8 (08)
  • [3] Comprehensive review of geomechanical constitutive models of gas hydrate-bearing sediments
    Wang, Lei
    Zhao, Jiafei
    Sun, Xiang
    Wu, Peng
    Shen, Shi
    Liu, Tao
    Li, Yanghui
    JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING, 2021, 88
  • [4] A state-dependent critical state model for methane hydrate-bearing sand
    Shen, J.
    Chiu, C. F.
    Ng, C. W. W.
    Lei, G. H.
    Xu, J.
    COMPUTERS AND GEOTECHNICS, 2016, 75 : 1 - 11
  • [5] A state-dependent constitutive model for gas hydrate-bearing sediment incorporating phase change
    Ng, Charles Wang Wai
    Lau, Sze Yu
    Zhang, Qi
    Zhang, Shuai
    San So, Pui
    Sanchez, Marcelo
    GAS SCIENCE AND ENGINEERING, 2023, 119
  • [6] A state-dependent constitutive model for methane hydrate-bearing sediments inside the stability region
    Ng, Charles Wang Wai
    Baghbanrezvan, Sina
    Kadlicek, Tomas
    Zhou, Chao
    GEOTECHNIQUE, 2020, 70 (12): : 1094 - 1108
  • [7] A geomechanical model for gas hydrate-bearing sediments
    Gai, Xuerui
    Sanchez, Marcelo
    ENVIRONMENTAL GEOTECHNICS, 2017, 4 (02): : 143 - 156
  • [8] A state-dependent hypoplastic model for methane hydrate-bearing sands
    Liu, Jun
    Wang, Shun
    Jiang, Mingjing
    Wu, Wei
    ACTA GEOTECHNICA, 2021, 16 (01) : 77 - 91
  • [9] Gas Hydrates in Permafrost: Distinctive Effect of Gas Hydrates and Ice on the Geomechanical Properties of Simulated Hydrate-Bearing Permafrost Sediments
    Yang, J.
    Hassanpouryouzband, A.
    Tohidi, B.
    Chuvilin, E.
    Bukhanov, B.
    Istomin, V.
    Cheremisin, A.
    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 2019, 124 (03) : 2551 - 2563
  • [10] A bounding surface model of gas-hydrate-bearing sediments
    Kong, Liang
    Wang, Xing
    Hua, Likun
    Lin, Xingyu
    ENVIRONMENTAL GEOTECHNICS, 2023, 10 (03): : 196 - 205