CO_(2)storage with enhanced gas recovery(CSEGR):A review of experimental and numerical studies

作     者：Shu-Yang Liu Bo Ren Hang-Yu Li Yong-Zhi Yang Zhi-Qiang Wang Bin Wang Jian-Chun Xu Ramesh Agarwal Shu-Yang Liu;Bo Ren;Hang-Yu Li;Yong-Zhi Yang;Zhi-Qiang Wang;Bin Wang;Jian-Chun Xu;Ramesh Agarwal

作者机构：Key Laboratory of Unconventional Oil&Gas Development(China University of Petroleum(East China))Ministry of EducationQingdao266580ShandongChina School of Petroleum EngineeringChina University of Petroleum(East China)Qingdao266580ShandongChina Bureau of Economic GeologyThe Jackson School of GeosciencesThe University of Texas at AustinAustinTXUSA Research Institute of Petroleum Exploration and DevelopmentBeijing100083China Tsinghua-Berkeley Shenzhen InstituteTsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen518055GuangdongChina Washington University in St.LouisSt.LouisMO63130USA 

出 版 物：《Petroleum Science》 (石油科学（英文版）)

年 卷 期：2022年第19卷第2期

页      面：594-607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(51906256 and 52074337) Fundamental Research Funds for the Central Universities(21CX06033A) 

主　　题：Carbon capture Utilization and storage(CCUS) Enhanced gas recovery CO_(2)geologic storage Miscible displacement Dispersion 

摘      要：CO_(2)emission mitigation is one of the most critical research frontiers.As a promising option of carbon capture,utilization and storage(CCUS),CO_(2)storage with enhanced gas recovery(CSEGR)can reduce CO_(2)emission by sequestrating it into gas reservoirs and simultaneously enhance natural gas production.Over the past decades,the displacement behaviour of CO_(2)—natural gas has been extensively studied and demonstrated to play a key role on both CO_(2)geologic storage and gas recovery performance.This work thoroughly and critically reviews the experimental and numerical simulation studies of CO_(2)displacing natural gas,along with both CSEGR research and demonstration projects at various scales.The physical property difference between CO_(2)and natural gas,especially density and viscosity,lays the foundation of CSEGR.Previous experiments on displacement behaviour and dispersion characteristics of CO_(2)/natural gas revealed the fundamental mixing characteristics in porous media,which is one key factor of gas recovery efficiency and warrants further study.Preliminary numerical simulations demonstrated that it is technically and economically feasible to apply CSEGR in depleted gas reservoirs.However,CO_(2)preferential flow pathways are easy to form(due to reservoir heterogeneity)and thus adversely compromise CSEGR performance.This preferential flow can be slowed down by connate or injected water.Additionally,the optimization of CO_(2)injection strategies is essential for improving gas recovery and CO_(2)storage,which needs further study.The successful K12—B pilot project provides insightful field-scale knowledge and experience,which paves a good foundation for commercial application.More experiments,simulations,research and demonstration projects are needed to facilitate the maturation of the CSEGR technology.