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Investigating the Interaction Effects between Reservoir Deformation and Hydrate Dissociation in Hydrate-Bearing Sediment by Depressurization Method

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  • Lijia Li

    (State Key Laboratory of Coal Mine Disaster Dynamics and Control, College of Resources and Safety Science, Chongqing University, Chongqing 400044, China
    Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
    Key Laboratory of Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
    Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China)

  • Xiaosen Li

    (State Key Laboratory of Coal Mine Disaster Dynamics and Control, College of Resources and Safety Science, Chongqing University, Chongqing 400044, China
    Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
    Key Laboratory of Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
    Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China)

  • Yi Wang

    (Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China)

  • Chaozhong Qin

    (State Key Laboratory of Coal Mine Disaster Dynamics and Control, College of Resources and Safety Science, Chongqing University, Chongqing 400044, China)

  • Bo Li

    (State Key Laboratory of Coal Mine Disaster Dynamics and Control, College of Resources and Safety Science, Chongqing University, Chongqing 400044, China)

  • Yongjiang Luo

    (State Key Laboratory of Coal Mine Disaster Dynamics and Control, College of Resources and Safety Science, Chongqing University, Chongqing 400044, China)

  • Jingchun Feng

    (Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou 510006, China)

Abstract

Natural gas hydrate (NGH) has been widely focused on having great potential for alternative energy. Numerous studies on gas production from hydrate-bearing sediments have been conducted in both laboratory and field. Since the strength of hydrate-bearing sediments depends on the saturation of NGH, the decomposition of NGH may cause the failure of sediments, then leading to reservoir deformation and other geological hazards. Plenty of research has shown that the reservoir deformation caused by hydrate decomposition is considerable. In order to investigate this, the influence of sediment deformation on the production of NGH, a fully coupled thermo-hydro-chemo-mechanical (THMC) model is established in this study. The interaction effects between reservoir deformation and hydrate dissociation are discussed by comparing the simulation results of the mechanical coupling and uncoupled models on the laboratory scale. Results show that obvious differences in behaviors between gas and water production are observed among these two models. Compared to the mechanical uncoupled model, the mechanical coupling model shows a significant compaction process when given a load equal to the initial pore pressure, which leads to a remarkable decrease of effective porosity and reservoir permeability, then delays the pore pressure drop rate and reduces the maximum gas production rate. It takes a longer time for gas production in the mechanical coupling model. Since the reservoir temperature is impacted by the comprehensive effects of the heat transfer from the boundary and the heat consumption of hydrate decomposition, the reduced maximum gas production rate and extended gas production process for the mechanical coupling model lead to the minimum reservoir temperature in the mechanical coupling model larger than that of the mechanical uncoupled model. The reduction of the effective porosity for the mechanical coupling model causes a larger cumulative water production. The results of this paper indicate that the reservoir deformation in the gas production process should be taken into account by laboratory and numerical methods to accurately predict the behaviors of gas production on the field scale.

Suggested Citation

  • Lijia Li & Xiaosen Li & Yi Wang & Chaozhong Qin & Bo Li & Yongjiang Luo & Jingchun Feng, 2021. "Investigating the Interaction Effects between Reservoir Deformation and Hydrate Dissociation in Hydrate-Bearing Sediment by Depressurization Method," Energies, MDPI, vol. 14(3), pages 1-16, January.
  • Handle: RePEc:gam:jeners:v:14:y:2021:i:3:p:548-:d:484781
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    References listed on IDEAS

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    1. Chong, Zheng Rong & Yang, She Hern Bryan & Babu, Ponnivalavan & Linga, Praveen & Li, Xiao-Sen, 2016. "Review of natural gas hydrates as an energy resource: Prospects and challenges," Applied Energy, Elsevier, vol. 162(C), pages 1633-1652.
    2. Sun, Xiang & Li, Yanghui & Liu, Yu & Song, Yongchen, 2019. "The effects of compressibility of natural gas hydrate-bearing sediments on gas production using depressurization," Energy, Elsevier, vol. 185(C), pages 837-846.
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    Cited by:

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    2. Dmitrii Antonov & Olga Gaidukova & Galina Nyashina & Dmitrii Razumov & Pavel Strizhak, 2022. "Prospects of Using Gas Hydrates in Power Plants," Energies, MDPI, vol. 15(12), pages 1-20, June.
    3. Shuai Yang & Yan Jin & Yunhu Lu & Yanru Zhang & Beibei Chen, 2021. "Performance of Hydraulically Fractured Wells in Xinjiang Oilfield: Experimental and Simulation Investigations on Laumontite-Rich Tight Glutenite Formation," Energies, MDPI, vol. 14(6), pages 1-19, March.
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    6. Qingping Li & Shuxia Li & Shuyue Ding & Zhenyuan Yin & Lu Liu & Shuaijun Li, 2022. "Numerical Simulation of Gas Production and Reservoir Stability during CO 2 Exchange in Natural Gas Hydrate Reservoir," Energies, MDPI, vol. 15(23), pages 1-17, November.

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