多孔介质中CO_(2)-CH_(4)水合物置换过程的强化方法研究进展  

Research progress of enhancement methods of CO_(2)-CH_(4) hydrate displacement in porous media

作　　者：张学民 李银辉[1,2,3] 张山岭 张梦军 李金平 王英梅[1,2,4] Xuemin ZHANG;Yinhui LI;Shanling ZHANG;Mengjun ZHANG;Jinping LI;Yingmei WANG(School of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou,Gansu 730050,China;Key Lab of Complementary Energy System of Biomass and Solar Energy Gansu Province,Lanzhou,Gansu 730050,China;Western China Research Center of Energy&Environment,Lanzhou University of Technology,Lanzhou,Gansu 730050,China;Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou,Gansu 730050,China)

机构地区：[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

出　　处：《过程工程学报》2022年第4期438-447,共10页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:51906093);甘肃省高等学校创新能力提升项目(编号:2019A-019);中科院天然气水合物重点实验室开放基金(编号:Y907ke1001,E029kf1501);兰州理工大学“红柳优秀青年人才支持计划”(编号:2018)。

摘　　要：CO_(2)置换天然气水合物中的CH_(4)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CO_(2)-CH_(4)水合物置换的研究进展,分析了制约CO_(2)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CO_(2)-CH_(4)水合物置换的强化方法研究进展,包括注入不同的CO_(2)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CO_(2)-CH_(4)水合物置换强化方法目前研究的不足和未来的研究方向。CO_(2) replacement of CH_(4) 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 CO_(2)-CH_(4) 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 CO_(2) displacement method to the exploitation of natural gas hydrate,are analyzed.In view of this problem,the research progress of strengthening methods for CO_(2)-CH_(4) hydrate replacement in porous media is comprehensively reviewed.It includes the enhancement of liquid CO_(2),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 CO_(2) and CH_(4) gas absorbability and the analysis of new ideas enhanced mass transfer during displacement due to the formation of porous CO_(2) hydrate.At the same time,the characteristics of various strengthening methods are analyzed.Primarily,different phase states of CO_(2),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 CO_(2).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 CO_(2)-CH_(4) hydrate displacement process in porous media are proposed.

关 键 词：多孔介质 天然气水合物 置换开采 效率 强化方法 

分 类 号：TE37[石油与天然气工程—油气田开发工程]