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过程工程学报 ›› 2022, Vol. 22 ›› Issue (4): 438-447.DOI: 10.12034/j.issn.1009-606X.221122

• 综述 • 上一篇    下一篇

多孔介质中CO2-CH4水合物置换过程的强化方法研究进展

张学民1,2,3*， 李银辉1,2,3， 张山岭1,2,3， 张梦军1,2,3， 李金平1,2,3， 王英梅1,2,4   

  1. 1. 兰州理工大学能源与动力工程学院，甘肃 兰州 730050 2. 甘肃省生物质能与太阳能互补供能系统重点实验室，甘肃 兰州 730050 3. 兰州理工大学西部能源与环境研究中心，甘肃 兰州 730050 4. 中国科学院西北生态环境资源研究院冻土工程国家重点实验室，甘肃 兰州 730050
  • 收稿日期:2021-04-12 修回日期:2021-06-09 出版日期:2022-04-28 发布日期:2022-04-24
  • 通讯作者: 张学民 zxm2010lut@163.com
  • 作者简介:张学民(1987-)，男，甘肃省康乐县人，副教授，博士，主要从事气体水合物生成与分解动力学方面的研究，E-mail: zxm2010lut@163.com.
  • 基金资助:
    国家自然科学基金;中科院天然气水合物重点实验室开放基金;甘肃省高等学校创新能力提升项目;兰州理工大学“红柳优秀青年人才支持计划”

Research progress of enhancement methods of CO2-CH4 hydrate displacement in porous media

Xuemin ZHANG1,2,3*,  Yinhui LI1,2,3,  Shanling ZHANG1,2,3,  Mengjun ZHANG1,2,3,  Jinping LI1,2,3,  #br# Yingmei WANG1,2,4   

  1. 1. School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China 2. Key Lab of Complementary Energy System of Biomass and Solar Energy Gansu Province, Lanzhou, Gansu 730050, China 3. Western China Research Center of Energy & Environment, Lanzhou University of Technology, Lanzhou, Gansu 730050, China 4. Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730050, China
  • Received:2021-04-12 Revised:2021-06-09 Online:2022-04-28 Published:2022-04-24
  • Contact: ZHANG Xue-Min zxm2010lut@163.com

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摘要： CO2置换天然气水合物中的CH4是一种非常有前途的天然气水合物开采方法，该法兼具能源安全开采和温室气体地层封存的双重优势。首先综述了多孔介质中CO2-CH4水合物置换的研究进展，分析了制约CO2置换法开采天然气水合物商业应用的关键瓶颈问题，即置换过程存在的反应周期长、速率慢和效率低等问题。针对此问题，主要详述了强化CO2-CH4水合物置换的强化方法研究进展，包括注入不同的CO2相态、小分子及混合气体的强化、结合传统开采法的联合强化以及其他强化方法的作用机理，讨论了各种强化方法尚待完善和改进的地方。最后提出了多孔介质中CO2-CH4水合物置换强化方法目前研究的不足和未来的研究方向。

关键词: 多孔介质, 天然气水合物, 置换开采, 效率, 强化方法

Abstract: CO2 replacement of CH4 from natural gas hydrate is a very promising method to exploit natural gas hydrate, this method has the dual advantages of energy safe exploitation and greenhouse gas formation storage. Firstly, the research progress of CO2-CH4 hydrate displacement in porous media is reviewed and the key bottleneck problems, such as long reaction cycle, slow rate and low efficiency, which restrict the commercial application of CO2 displacement method to the exploitation of natural gas hydrate, are analyzed. In view of this problem, the research progress of strengthening methods for CO2-CH4 hydrate replacement in porous media is comprehensively reviewed. It includes the enhancement of liquid CO2, the enhancement of small molecules such as N2 and H2, the enhancement of prolongation of reaction time, the enhancement of application of adsorption materials with both CO2 and CH4 gas absorbability and the analysis of new ideas enhanced mass transfer during displacement due to the formation of porous CO2 hydrate. At the same time, the characteristics of various strengthening methods are analyzed. Primarily, different phase states of CO2, small molecules and mixed gases reinforcement replacement and the mechanism of other reinforcement methods are described in detail, and the improvement of various reinforcement methods is discussed. Studies show that, for the overall recovery rate, replacement combined with conventional methods is more effective than introducing small molecule mixture and changing the injected phase state of CO2. Therefore, the combined enhancement of the single method is an effective way to improve the replacement efficiency. Finally, the shortcomings of the current research and the future research direction of the enhancement of CO2-CH4 hydrate displacement process in porous media are proposed.

Key words: porous media, natural gas hydrate, replacement exploitation, efficiency, reinforcing method