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Numerical Analysis on Gas Production Efficiency from Hydrate Deposits by Thermal Stimulation: Application to the Shenhu Area, South China Sea

Author

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  • Zheng Su

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

  • Yuncheng Cao

    (Guangzhou Center for Gas Hydrate Research, Chinese Academy of Sciences, Guangzhou, 510640, China
    Key Laboratory of Marginal Sea Geology, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China)

  • Nengyou Wu

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

  • Yong He

    (Guangzhou Center for Gas Hydrate Research, Chinese Academy of Sciences, Guangzhou, 510640, China
    Key Laboratory of Marginal Sea Geology, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China)

Abstract

Gas hydrates have been attracted a great deal of attention because of their potential as an energy substitute and the climate implications. Drilling and sampling research on the hydrate deposit in the Shenhu Area on the northern continental slope of the Southern China Sea was a big breakthrough for hydrate investigation in China, but as a new potential energy source, how the gas can be effectively produced from hydrate deposits has become a hot research topic. Besides depressurization heat stimulation is regarded as another important means for producing hydrate-derived gas, however, the production efficiency and economic feasibility of producing gas by heat stimulation have not been clearly understood. In this paper, a simplified model for predicting gas production from hydrate deposits by heat stimulation is developed. The model ideally neglects the effects of heat convection and pressure regime in the sediments for simplicity. We compute the heat consumption efficiency and gas energy efficiency of gas production from hydrate deposits by heat stimulation, only considering effect of hydrate dissociation due to heat input. This model is for predicting the maximum production efficiency. By studying the hydrate reservoirs and significant parameters collected from drilling and sampling researches, we calculate the production potential of the Shenhu hydrate deposits and investigate the production efficiency and feasibility. Our research shows that the maximum amount of cumulative gas production at Shenhu is ~509 m 3 per meter in three years. The production potential is much lower than the industrial criterion for marine production. In our discussion the numerical simulations show that a practical potential of the gas production is merely 25 m 3 /m in 3 years and contribution of thermal stimulation is very small in joint-production schemes. We conclude that production cost is quite high and the economic value of producing gas from the hydrate through a vertical well is not attractive, even though the production by heat stimulation theoretically has a very high heat consumption rate and energy efficiency.

Suggested Citation

  • Zheng Su & Yuncheng Cao & Nengyou Wu & Yong He, 2011. "Numerical Analysis on Gas Production Efficiency from Hydrate Deposits by Thermal Stimulation: Application to the Shenhu Area, South China Sea," Energies, MDPI, vol. 4(2), pages 1-20, February.
    • Handle: RePEc:gam:jeners:v:4:y:2011:i:2:p:294-313:d:11308
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    Citations

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    Cited by:

    1. Liu, Yongge & Hou, Jian & Zhao, Haifeng & Liu, Xiaoyu & Xia, Zhizeng, 2018. "A method to recover natural gas hydrates with geothermal energy conveyed by CO2," Energy, Elsevier, vol. 144(C), pages 265-278.
    2. Huang, Li & Su, Zheng & Wu, Neng-You, 2015. "Evaluation on the gas production potential of different lithological hydrate accumulations in marine environment," Energy, Elsevier, vol. 91(C), pages 782-798.
    3. Yi Wang & Jing-Chun Feng & Xiao-Sen Li & Yu Zhang & Gang Li, 2016. "Evaluation of Gas Production from Marine Hydrate Deposits at the GMGS2-Site 8, Pearl River Mouth Basin, South China Sea," Energies, MDPI, vol. 9(3), pages 1-22, March.
    4. Jiang, Wei & Kan, Jingyu & Dong, Baocan & Li, Xingxun & Wang, Xiaohui & Deng, Chun & Liu, Bei & Li, Qingping & Sun, Changyu & Chen, Guangjin, 2023. "Natural gas hydrate exploitation and recovered natural gas liquefaction driven by wind power: Process modelling and energy performance evaluation," Energy, Elsevier, vol. 282(C).
    5. Bo Li & Xiao-Sen Li & Gang Li & Jia-Lin Jia & Jing-Chun Feng, 2013. "Measurements of Water Permeability in Unconsolidated Porous Media with Methane Hydrate Formation," Energies, MDPI, vol. 6(7), pages 1-15, July.
    6. Yang, Mingjun & Zhao, Jie & Zheng, Jia-nan & Song, Yongchen, 2019. "Hydrate reformation characteristics in natural gas hydrate dissociation process: A review," Applied Energy, Elsevier, vol. 256(C).
    7. 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.

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