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Mechanism of Hydrate Decomposition Influenced by Reservoir Structural Characteristics Around Hydrate Wells.

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Title: Mechanism of Hydrate Decomposition Influenced by Reservoir Structural Characteristics Around Hydrate Wells.
Authors: Jiang, Jianhang1 (AUTHOR), Li, Zhandong1,2 (AUTHOR), Liang, Yipeng1 (AUTHOR), Zhu, Jiawen1,2 (AUTHOR), Han, Bo2 (AUTHOR)
Source: Energies (19961073). Jan2026, Vol. 19 Issue 2, p404. 12p.
Subjects: Natural gas production, Creep testing, Deformations (Mechanics), Reservoir ecology, Hazards, Chemical processes, Sediment analysis
Abstract: As a future abundant and environmentally friendly clean energy source, the decomposition process of natural gas hydrates is significantly regulated by reservoir structural characteristics. Improper extraction can easily trigger geological hazards, yet current research on the coupling mechanism between wellbore microstructure and decomposition remains incomplete. To elucidate the regulatory role of reservoir structural characteristics, this study employed a self-developed physical simulation system to conduct triaxial creep experiments. It compared the mechanical response and decomposition dynamics of sediments under layered and homogeneous hydrate distribution patterns, while simultaneously monitoring gas production and formation displacement parameters. Results indicate that layered distribution significantly influences overall sediment creep behavior and failure patterns: low-saturation sublayers dominate the creep softening–hardening mechanism, while strain evolution at different timescales and long-term bearing capacity are controlled by low- and high-saturation sublayers, respectively. Creep cohesion and internal friction angle exhibit distinct differences between the two distribution patterns, with the influence mechanisms of relevant mechanical indicators closely related to the roles of sublayers with varying saturations. The study also uncovers the intrinsic link between gas production and stratigraphic subsidence during hydrate decomposition, clarifying the core mechanism by which reservoir structures influence decomposition stability through regulating mechanical responses. The methodologies and conclusions of this research provide scientific support for predicting the long-term stability of natural gas hydrate reservoirs and enabling safe, efficient extraction, while laying the groundwork for the systematic development of comprehensive hydrate technologies. [ABSTRACT FROM AUTHOR]
Copyright of Energies (19961073) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 191171845
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PubTypeId: academicJournal
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  Label: Title
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  Data: Mechanism of Hydrate Decomposition Influenced by Reservoir Structural Characteristics Around Hydrate Wells.
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  Data: <searchLink fieldCode="AR" term="%22Jiang%2C+Jianhang%22">Jiang, Jianhang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Zhandong%22">Li, Zhandong</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liang%2C+Yipeng%22">Liang, Yipeng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhu%2C+Jiawen%22">Zhu, Jiawen</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Han%2C+Bo%22">Han, Bo</searchLink><relatesTo>2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. Jan2026, Vol. 19 Issue 2, p404. 12p.
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  Data: <searchLink fieldCode="DE" term="%22Natural+gas+production%22">Natural gas production</searchLink><br /><searchLink fieldCode="DE" term="%22Creep+testing%22">Creep testing</searchLink><br /><searchLink fieldCode="DE" term="%22Deformations+%28Mechanics%29%22">Deformations (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Reservoir+ecology%22">Reservoir ecology</searchLink><br /><searchLink fieldCode="DE" term="%22Hazards%22">Hazards</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+processes%22">Chemical processes</searchLink><br /><searchLink fieldCode="DE" term="%22Sediment+analysis%22">Sediment analysis</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: As a future abundant and environmentally friendly clean energy source, the decomposition process of natural gas hydrates is significantly regulated by reservoir structural characteristics. Improper extraction can easily trigger geological hazards, yet current research on the coupling mechanism between wellbore microstructure and decomposition remains incomplete. To elucidate the regulatory role of reservoir structural characteristics, this study employed a self-developed physical simulation system to conduct triaxial creep experiments. It compared the mechanical response and decomposition dynamics of sediments under layered and homogeneous hydrate distribution patterns, while simultaneously monitoring gas production and formation displacement parameters. Results indicate that layered distribution significantly influences overall sediment creep behavior and failure patterns: low-saturation sublayers dominate the creep softening–hardening mechanism, while strain evolution at different timescales and long-term bearing capacity are controlled by low- and high-saturation sublayers, respectively. Creep cohesion and internal friction angle exhibit distinct differences between the two distribution patterns, with the influence mechanisms of relevant mechanical indicators closely related to the roles of sublayers with varying saturations. The study also uncovers the intrinsic link between gas production and stratigraphic subsidence during hydrate decomposition, clarifying the core mechanism by which reservoir structures influence decomposition stability through regulating mechanical responses. The methodologies and conclusions of this research provide scientific support for predicting the long-term stability of natural gas hydrate reservoirs and enabling safe, efficient extraction, while laying the groundwork for the systematic development of comprehensive hydrate technologies. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Energies (19961073) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/en19020404
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        Text: English
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        PageCount: 12
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      – SubjectFull: Natural gas production
        Type: general
      – SubjectFull: Creep testing
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      – SubjectFull: Deformations (Mechanics)
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      – SubjectFull: Hazards
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      – SubjectFull: Chemical processes
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      – SubjectFull: Sediment analysis
        Type: general
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      – TitleFull: Mechanism of Hydrate Decomposition Influenced by Reservoir Structural Characteristics Around Hydrate Wells.
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            NameFull: Jiang, Jianhang
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              M: 01
              Text: Jan2026
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