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Numerical Investigation of the Production Behavior of Methane Hydrates under Depressurization Conditions Combined with Well-Wall Heating

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  • Xuke Ruan

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

  • Xiao-Sen Li

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

  • Chun-Gang Xu

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

Abstract

In this study, a 2D hydrate dissociation simulator has been improved and verified to be valid in numerical simulations of the gas production behavior using depressurization combined with a well-wall heating method. A series of numerical simulations were performed and the results showed that well-wall heating had an influence enhancing the depressurization-induced gas production, but the influence was limited, and it was even gradually weakened with the increase of well-wall heating temperature. Meanwhile, the results of the sensitivity analysis demonstrated the gas production depended on the initial hydrate saturation, initial pressure and the thermal boundary conditions. The supply of heat for hydrate dissociation mainly originates from the thermal boundaries,whichcontrolthehydratedissociationandgasproductionbydepressurizationcombined with well-wall heating. However, the effect of initial temperature on the gas production could be nearly negligible under depressurization conditions combined with well-wall heating.

Suggested Citation

  • Xuke Ruan & Xiao-Sen Li & Chun-Gang Xu, 2017. "Numerical Investigation of the Production Behavior of Methane Hydrates under Depressurization Conditions Combined with Well-Wall Heating," Energies, MDPI, vol. 10(2), pages 1-17, January.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:2:p:161-:d:89145
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    References listed on IDEAS

    as
    1. Xu, Chun-Gang & Cai, Jing & Lin, Fu-hua & Chen, Zhao-Yang & Li, Xiao-Sen, 2015. "Raman analysis on methane production from natural gas hydrate by carbon dioxide–methane replacement," Energy, Elsevier, vol. 79(C), pages 111-116.
    2. Xuke Ruan & Yongchen Song & Jiafei Zhao & Haifeng Liang & Mingjun Yang & Yanghui Li, 2012. "Numerical Simulation of Methane Production from Hydrates Induced by Different Depressurizing Approaches," Energies, MDPI, vol. 5(2), pages 1-21, February.
    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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    Cited by:

    1. Li, Xiao-Yan & Wan, Kun & Wang, Yi & Li, Xiao-Sen, 2022. "The double-edged characteristics of the soaking time during hydrate dissociation by periodic depressurization combined with hot water injection," Applied Energy, Elsevier, vol. 325(C).
    2. Yun-Pei Liang & Shu Liu & Qing-Cui Wan & Bo Li & Hang Liu & Xiao Han, 2018. "Comparison and Optimization of Methane Hydrate Production Process Using Different Methods in a Single Vertical Well," Energies, MDPI, vol. 12(1), pages 1-21, December.
    3. Lin Yang & Chen Chen & Rui Jia & Youhong Sun & Wei Guo & Dongbin Pan & Xitong Li & Yong Chen, 2018. "Influence of Reservoir Stimulation on Marine Gas Hydrate Conversion Efficiency in Different Accumulation Conditions," Energies, MDPI, vol. 11(2), pages 1-16, February.
    4. Jung-Tae Kim & Ah-Ram Kim & Gye-Chun Cho & Chul-Whan Kang & Joo Yong Lee, 2019. "The Effects of Coupling Stiffness and Slippage of Interface Between the Wellbore and Unconsolidated Sediment on the Stability Analysis of the Wellbore Under Gas Hydrate Production," Energies, MDPI, vol. 12(21), pages 1-23, November.
    5. Chen Chen & Lin Yang & Rui Jia & Youhong Sun & Wei Guo & Yong Chen & Xitong Li, 2017. "Simulation Study on the Effect of Fracturing Technology on the Production Efficiency of Natural Gas Hydrate," Energies, MDPI, vol. 10(8), pages 1-16, August.

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