气体水合物合成研究进展  

Research progress of gas hydrate synthesis

作　　者：吴财芳[1,2] 高彬 李清[3] 陈贞龙[3] WU Caifang;GAO Bin;LI Qing;CHEN Zhenong(Key Laboratory of Coalbed Methane Resource&Reservoir Formation Process,Ministry of Education,China University of Mining&Technology,Xuzhou,Jiangsu 221116,China;School of Resources and Earth Science,China University of Mining&Technology,Xuzhou,Jiangsu 221116,China;Sinopec East China Oil&Company,Nanjing,Jiangsu 210000,China)

机构地区：[1]中国矿业大学教育部煤层气资源与成藏过程重点实验室,江苏徐州221116 [2]中国矿业大学资源与地球科学学院,江苏徐州221116 [3]中国石化华东油气分公司,江苏南京210000

出　　处：《油气藏评价与开发》2024年第2期267-276,共10页Petroleum Reservoir Evaluation and Development

基　　金：国家自然科学基金面上项目“煤层气排采时储层气水状态及其对渗透率的控制作用”(41872170);国家自然科学基金重点项目“深部煤层气储渗系统优化改造机理及产出效应”(42130802);贵州省科技计划项目“贵州省煤层气(煤矿瓦斯)抽采提产增效关键技术及工程试验”([2022]ZD001);贵州省科技计划项目“贵州省煤层气地质工程一体化研究科技创新人才团队”(CXTD[2022]016)。

摘　　要：水合物法捕集与封存CO_(2)气体可服务于大规模减排的技术需求,加速“碳中和”目标的实现,对应对气候变化具有重要意义。从气体水合物的基本性质、生成机理及模型,多孔介质中水合物合成,水合物合成的分子动力学模拟等方面,综述了前人针对水合物合成领域的研究现状,提出了气体水合物合成过程中存在的科学问题,并对气体水合物的发展及煤系地层CO_(2)水合物的封存方向进行了评价。研究认为,CO_(2)气体的溶解度是限制准确计算多孔介质中水合物储气量的关键因素;气体水合物的局部结构化(成核)机制复杂,仍需深入研究;高纬度及永久冻土区煤系地层可作为水合物法封存CO_(2)气体的地下空间。The utilization of hydrate-based capture and storage of CO_(2) presents a promising avenue for substantial emissions reduction,contributing significantly to achieving carbon neutrality goals and addressing climate change.This paper delves into the foundational aspects of gas hydrates,including their properties,formation mechanisms,and models,as well as hydrate synthesis within porous media and the use of molecular dynamics simulations for understanding hydrate formation.Key challenges identified in the synthesis process of gas hydrates include the limited solubility of CO_(2) in porous media,which poses a significant hurdle in precisely determining the storage capacity of CO_(2) hydrates.Additionally,the local structural mechanisms,particularly nucleation processes involved in gas hydrate formation,are highlighted as complex areas that warrant further investigation.The paper also evaluates the potential of coal-bearing strata,especially in high-latitude and permafrost regions,as viable underground repositories for CO_(2) storage via hydrate formation.This approach not only offers a method for reducing atmospheric CO_(2) levels but also leverages the unique geological characteristics of these regions to enhance the efficiency and stability of CO_(2) storage.In summary,while hydrate-based CO_(2) capture and storage technologies hold considerable promise for climate change mitigation,addressing the scientific and technical challenges identified in this review is crucial for advancing the field and optimizing the efficacy of this storage method.

关 键 词：水合物 碳中和 煤基介质 CO_(2)水合物合成 研究进展 

分 类 号：TE31[石油与天然气工程—油气田开发工程]