首页|Large-Scale Carbon Dioxide Storage in Salt Caverns:Evaluation of Operation,Safety,and Potential in China

Large-Scale Carbon Dioxide Storage in Salt Caverns:Evaluation of Operation,Safety,and Potential in China

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Underground salt cavern CO2 storage(SCCS)offers the dual benefits of enabling extensive CO2 storage and facilitating the utilization of CO2 resources while contributing the regulation of the carbon market.Its economic and operational advantages over traditional carbon capture,utilization,and storage(CCUS)projects make SCCS a more cost-effective and flexible option.Despite the widespread use of salt caverns for storing various substances,differences exist between SCCS and traditional salt cavern energy storage in terms of gas-tightness,carbon injection,brine extraction control,long-term carbon storage sta-bility,and site selection criteria.These distinctions stem from the unique phase change characteristics of CO2 and the application scenarios of SCCS.Therefore,targeted and forward-looking scientific research on SCCS is imperative.This paper introduces the implementation principles and application scenarios of SCCS,emphasizing its connections with carbon emissions,carbon utilization,and renewable energy peak shaving.It delves into the operational characteristics and economic advantages of SCCS compared with other CCUS methods,and addresses associated scientific challenges.In this paper,we establish a pressure equation for carbon injection and brine extraction,that considers the phase change characteristics of CO2,and we analyze the pressure during carbon injection.By comparing the viscosities of CO2 and other gases,SCCS's excellent sealing performance is demonstrated.Building on this,we develop a long-term stability evaluation model and associated indices,which analyze the impact of the injection speed and minimum operating pressure on stability.Field countermeasures to ensure stability are proposed.Site selection cri-teria for SCCS are established,preliminary salt mine sites suitable for SCCS are identified in China,and an initial estimate of achievable carbon storage scale in China is made at over 51.8-77.7 million tons,utiliz-ing only 20％-30％volume of abandoned salt caverns.This paper addresses key scientific and engineering challenges facing SCCS and determines crucial technical parameters,such as the operating pressure,bur-ial depth,and storage scale,and it offers essential guidance for implementing SCCS projects in China.

Carbon-neutralitySalt cavernLarge-scale CO2 storageInjection and withdrawalStability analysis

Wei Liu、Xiong Zhang、Jifang Wan、Chunhe Yang、Liangliang Jiang、Zhangxin Chen、Maria Jose Jurado、Xilin Shi、Deyi Jiang、Wendong Ji、Qihang Li

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State Key Laboratory of Coal Mine Disaster Dynamics and Control,Chongqing University,Chongqing 400044,China

China Energy Digital Technology Group Co.Ltd.,Beijing 100044,China

Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430064,China

Department of Chemical and Petroleum Engineering,University of Calgary,Calgary,AB T2N 1N4,Canada

Eastern Institute of Technology,Ningbo 315200,China

Geosciences Barcelona CSIC,Spanish National Research Council,Barcelona 08028,Spain

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaGraduate Research and Innovation Foundation of ChongqingChongqing Talents Plan for Young TalentsHunan Institute of EngineeringHunan Institute of EngineeringHunan Province Education Department

52074046521224035183400352274073CYB22023cstc2022ycjhbgzxm003521RC025XJ200521B0664

2024

10.1016/j.eng.2024.06.013

工程(英文)

工程(英文)

CSTPCDEI
ISSN：2095-8099
年,卷(期)：2024.40(9)