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Effect of Drilling Fluid Invasion on Natural Gas Hydrate Near-Well Reservoirs Drilling in a Horizontal Well

Author

Listed:
  • Qibing Wang

    (Department of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
    CNPC Engineering Technology R & D Company Limited, Beijing 102206, China)

  • Ren Wang

    (Department of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
    CNPC Engineering Technology R & D Company Limited, Beijing 102206, China)

  • Jiaxin Sun

    (Faculty of Engineering, China University of Geosciences, Wuhan 430074, China)

  • Jinsheng Sun

    (Department of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
    CNPC Engineering Technology R & D Company Limited, Beijing 102206, China)

  • Cheng Lu

    (Center of Oil & Natural Gas Resource Exploration, China Geological Survey, Beijing 100083, China)

  • Kaihe Lv

    (Department of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China)

  • Jintang Wang

    (Department of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China)

  • Jianlong Wang

    (Department of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
    CNPC Engineering Technology R & D Company Limited, Beijing 102206, China)

  • Jie Yang

    (CNPC Engineering Technology R & D Company Limited, Beijing 102206, China
    School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China)

  • Yuanzhi Qu

    (CNPC Engineering Technology R & D Company Limited, Beijing 102206, China)

Abstract

Horizontal wells can significantly improve the gas production and are expected to be an efficient exploitation method for the industrialization of natural gas hydrates (NGHs) in the future. However, the near-wellbore hydrate is highly prone to decomposition during the drilling process, owing to the disturbance aroused by the factors such as the drilling fluid temperature, pressure, and salinity. These issues can result in the engineering accidents such as bit sticking and wellbore instability, which are required for further investigations. This paper studies the characteristics of drilling fluid invasion into the marine NGH reservoir with varied drilling fluid parameters via numerical simulation. The effects of the drilling fluid parameters on the decomposition behavior of near-wellbore hydrates are presented. The simulating results show that the adjustments of drilling fluid density within the mud safety window have limited effects on the NGH decomposition, meanwhile the hydrates reservoir is most sensitive to the drilling fluid temperature variation. If the drilling fluid temperature grows considerably due to improper control, the range of the hydrates decomposition around the horizontal well tends to expand, which then aggravates wellbore instability. When the drilling fluid salinity varies in the range of 3.5–7.5%, the increase in the ion concentration speeds up the hydrate decomposition, which is adverse to maintaining wellbore stability.

Suggested Citation

  • Qibing Wang & Ren Wang & Jiaxin Sun & Jinsheng Sun & Cheng Lu & Kaihe Lv & Jintang Wang & Jianlong Wang & Jie Yang & Yuanzhi Qu, 2021. "Effect of Drilling Fluid Invasion on Natural Gas Hydrate Near-Well Reservoirs Drilling in a Horizontal Well," Energies, MDPI, vol. 14(21), pages 1-15, October.
  • Handle: RePEc:gam:jeners:v:14:y:2021:i:21:p:7075-:d:667523
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    References listed on IDEAS

    as
    1. E. Dendy Sloan, 2003. "Fundamental principles and applications of natural gas hydrates," Nature, Nature, vol. 426(6964), pages 353-359, November.
    2. 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.
    3. Lu, Shyi-Min, 2015. "A global survey of gas hydrate development and reserves: Specifically in the marine field," Renewable and Sustainable Energy Reviews, Elsevier, vol. 41(C), pages 884-900.
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    Cited by:

    1. Lei Wang & Jin Yang & Lilin Li & Ting Sun & Dongsheng Xu, 2022. "Study on the Mechanical Properties of Natural Gas Hydrate Reservoirs with Multicomponent under Different Engineering Conditions," Energies, MDPI, vol. 15(23), pages 1-23, November.
    2. Dong, Lin & Wan, Yizhao & Li, Yanlong & Liao, Hualin & Liu, Changling & Wu, Nengyou & Leonenko, Yuri, 2022. "3D numerical simulation on drilling fluid invasion into natural gas hydrate reservoirs," Energy, Elsevier, vol. 241(C).
    3. Qi Nie & Shifan Zhang & Yuan Huang & Xianzhong Yi & Jiwei Wu, 2022. "Numerical and Experimental Investigation on Safety of Downhole Solid–Liquid Separator for Natural Gas Hydrate Exploitation," Energies, MDPI, vol. 15(15), pages 1-14, August.

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