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Investigating CO 2 Replacement for the Exploitation of Natural Gas Hydrates: Characteristics and Control Parameters

Author

Listed:
  • Yan Zhu

    (School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
    Institute of Porous Flow and Fluid Mechanics, Chinese Academy of Sciences, Langfang 065007, China)

  • Qun Zhang

    (State Key Laboratory of Enhanced Oil and Gas Recovery, Beijing 100083, China
    Petro People’s Republic of China Research Institute of Petroleum Exploration & Development, Beijing 100083, China)

  • Haiyan Jiang

    (College of Petroleum Engineering, Xi’an Shiyou University, Xi’an 710065, China)

  • Guo Chen

    (State Key Laboratory of Enhanced Oil and Gas Recovery, Beijing 100083, China
    Petro People’s Republic of China Research Institute of Petroleum Exploration & Development, Beijing 100083, China)

  • Shibao Yuan

    (College of Petroleum Engineering, Xi’an Shiyou University, Xi’an 710065, China)

  • Zhe Wang

    (People’s Republic of China Petroleum & Chemical Corporation (Sinopec) Northwest Oilfield Branch, Urumqi 830011, China)

Abstract

In response to escalating global energy demand and climate change mitigation needs, natural gas hydrates (NGHs) are gaining prominence as a clean energy source. The CO 2 replacement method is an innovative NGH extraction technique that reduces reservoir risks and enables CO 2 sequestration. However, our understanding of the dynamics and control parameters in the hydrate replacement process is limited. This study pioneers a kinetic analysis and conceptual model for a CO 2 -driven hydrate replacement, dividing the process into three spatial realms and sequential stages. We identify the optimal injection temperature range for standard NGH reservoirs and highlight the interplay between the gas injection rate and bottom-hole pressure on CH 4 yield. Our findings offer insights on how to optimize production efficiency and gas separation, advancing CO 2 replacement technology for NGHs.

Suggested Citation

  • Yan Zhu & Qun Zhang & Haiyan Jiang & Guo Chen & Shibao Yuan & Zhe Wang, 2025. "Investigating CO 2 Replacement for the Exploitation of Natural Gas Hydrates: Characteristics and Control Parameters," Energies, MDPI, vol. 18(4), pages 1-21, February.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:4:p:924-:d:1591443
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    References listed on IDEAS

    as
    1. Zhang, Shanling & Ma, Yingrui & Xu, Zhenhua & Zhang, Yongtian & Liu, Xiang & Zhong, Xiuping & Tu, Guigang & Chen, Chen, 2024. "Numerical simulation study of natural gas hydrate extraction by depressurization combined with CO2 replacement," Energy, Elsevier, vol. 303(C).
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