非均质多孔介质内CO_(2)水合物生成特性研究  

Formation Characteristics of CO_(2) Gas Hydrate in Heterogeneous Porous Media

作　　者：李少华 王思佳 许华铮 宋永臣[1] 蒋兰兰[1] LI Shaohua;WANG Sijia;XU huazheng;SONG Yongchen;JIANG Lanlan(Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学海洋能源利用与节能教育部重点实验室,大连116024

出　　处：《工程热物理学报》2022年第10期2599-2602,共4页Journal of Engineering Thermophysics

基　　金：国家重点研发计划(No.2017YFC0307300);国家自然科学基金(No.51976023,No.52076032);辽宁省自然科学基金(No.2019-MS-061);中央高校基本科研业务费(No.DUT20RC(5)003);中国科学院广州能源转化研究所气体水合物重点实验室(No.E129kf1101)。

摘　　要：利用水合物法封存CO_(2)是当前具有应用前景的技术,其在非均质储层内生成过程的孔隙竞争特性的相关研究尚不清晰。低场核磁共振仪(NMR)被用来分析CO_(2)水合物生成过程中的流体相分布,三种尺寸直径的玻璃砂分层填装(小粒径BZ01、中粒径BZ02和大粒径BZ06)作为多孔介质。诱导阶段后固相水合物在较大的孔隙中生成,T_(2)谱图向左移动。不同砂层对应最终水转化率为77.5%、82.1%和89.3%。结果可为非均质海洋储层中水合物法封存CO_(2)提供选址依据。At present,it’s an extraordinarily promising technology to store CO_(2)by hydrate methods to mitigate climate change,but the mechanisms of pore competition during the hydrate formation process and the occurrence characteristics in heterogeneous reservoirs are not clear.Using low-field 1H NMR to analyze the distribution of fluid phase during the CO_(2)hydrate formation.Three sizes of glass sand(BZ01,BZ02,BZ06)were layered as porous media.The hydrates grew in larger pores after the induction stage,and the T_(2) spectrum moves to the left.The final water conversion rates are 77.5%,82.1%,89.3%corresponding to different layers.The results can provide the basis of sites selection for CO_(2)storage by hydrate methods in heterogeneous saline reservoirs.

关 键 词：CO_(2)水合物 非均质 NMR 孔隙竞争 

分 类 号：TK019[动力工程及工程热物理]