Enhanced gas production and CO_(2) storage in hydrate-bearing sediments via pre-depressurization and rapid CO_(2) injection

作     者：Hongnan Chen Yifei Sun Bojian Cao Minglong Wang Ming Wang Jinrong Zhong Changyu Sun Guangjin Chen Hongnan Chen;Yifei Sun;Bojian Cao;Minglong Wang;Ming Wang;Jinrong Zhong;Changyu Sun;Guangjin Chen

作者机构：State Key Laboratory of Heavy Oil ProcessingChina University of PetroleumBeijing 102249China School of Chemistry and Chemical EngineeringChangsha University of Science&TechnologyChangsha 410114China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2024年第67卷第3期

页      面：126-134页

核心收录：

学科分类：0820[工学-石油与天然气工程] 08[工学] 082002[工学-油气田开发工程] 

基　　金：financially supported by the National Natural Science Foundation of China,China(22378424,52004136,22127812,U20B6005) the Science Foundation of China University of Petroleum Beijing(2462023BJRC017) Hunan Provincial Department of Education Scientific Research Project(22B0310) 

主　　题：Hydrate Depressurization CO_(2) storage CH_(4) production Reservoir remediation 

摘      要：Carbon emission reduction and clean energy development are urgent demands for mankind in the coming *** an efficient CO_(2) storage method can significantly reduce CO_(2) emissions in the short *** this study,we attempted to construct sediment samples with different residual CH_(4) hydrate amounts and reservoir conditions,and then investigate the potentials of both CO_(2) storage and enhanced CH_(4) recovery in depleted gas hydrate deposits in the permafrost and ocean zones,*** results demonstrate that CO_(2) hydrate formation rate can be significantly improved due to the presence of residual hydrate seeds;However,excessive residual hydrates in turn lead to the decrease in CO_(2) storage *** by the T-P conditions of the reservoir,the storage amount of liquid CO_(2) can reach 8 times that of gaseous CO_(2),and CO_(2) stored in hydrate form reaches 2-4 ***,we noticed two other advantages of this *** is that CO_(2) injection can enhance CH_(4) recovery rate and increases CH_(4) recovery by 10%-20%.The second is that hydrate saturation in the reservoir can be restored to 20%-40%,which means that the solid volume of the reservoir avoids serious ***,this is crucial for protecting the goaf *** summary,this approach is greatly promising for high-efficient CO_(2) storage and safe exploitation of gas hydrate.