Salt-cavern underground gas storage is technically faced with non-uniform distribution of stratified salt rocks,complex solution mining mechanism,difficult control of solution mining process,less operation safety and ...Salt-cavern underground gas storage is technically faced with non-uniform distribution of stratified salt rocks,complex solution mining mechanism,difficult control of solution mining process,less operation safety and stability of caverns and difficult reconstruction and utilization of old caverns.In view of these technical difficulties,the design concept was fully updated based on the design experience and field practice of Jintan gas storage in Jiangsu,for purpose of maximizing salt layer utilization ratio,improving solution mining efficiency,shortening construction time and ensuring cavity safety.Based on the updated design concept,five series of key technologies were proposed in site evaluation,cavern design and control,stability assessment and storage capacity parameter design,old cavern screening and utilization,and gas storage operation and monitoring.The following results were obtained from the actual application of these key technologies to the Jintan gas storage.First,the actual drilling coincidence rate of geological program is high.Second,the cavern is morphologically coincident with the design.Third,the cavern deformation retract rate is in line with the stability evaluation result.Fourth,old caverns are successfully reconstructed and utilized.Fifth,the arrangement of the monitoring network ensures the operation safety of salt-cavern underground gas storage and makes an important contribution to the peak shaving and supply guarantee of natural gas in the Yangtze River Delta region.In conclusion,the research results provide guidance for the design and engineering implementation of salt-cavern underground gas storage construction program,as well as a theoretical and technical support for the construction of similar gas storages.展开更多
In order to meet the demand of constructing salt-cavern underground gas storages(UGSs)in favorable salt mines for the regions that are neither major oil and gas production zones nor major natural gas consumer markets ...In order to meet the demand of constructing salt-cavern underground gas storages(UGSs)in favorable salt mines for the regions that are neither major oil and gas production zones nor major natural gas consumer markets in South China,and solve the problems of unclear conditions for selecting salt-cavern gas storage sites and of inconsistent content and depth in evaluating gas storage conditions,based on investigation and analysis of salt-cavern UGS data in China and other countries,we proposed the principles of selecting gas storage sites in combination with geology and ground surface conditions,and developed a set of technologies in evaluating construction conditions for salt-cavern gas storages.By applying the selection principles of salt-cavern UGSs,we selected and sorted some salt mines in the three major natural gas consumer markets(the Yangtze River Delta,CentraleSouth China,and Southeast Coast of China),and evaluated the conditions of constructing a gas storage in the Huai'an salt mine with better conditions.The following findings were obtained.First,the principles of selecting gas storage sites can be applied to quickly optimize and sort the selected targets,including 6 items of geological factors such as structure,burial depth,salt-bearing layer thickness,NaCl content,top rock,and reserves,and 3 other items such as ground surface conditions,water source and brine,distance from pipeline networks.Second,the evaluation system of UGS construction conditions integrates features of structure and salt-bearing strata,tightness,firmness,dissolubility evaluation,prediction of gas storage scale,and analysis of cavity making condition.In conclusion,the new evaluation technologies can not only effectively guide the site selection and evaluation of salt-cavern UGSs but provide foundation and power support for their scheme designs,and the presented pilot proposal for utilizing thick interlayers has achieved a perfect on-site application effect.This study is of great significance for constructing UGSs in China.展开更多
压缩空气储能(Compressed Air Energy Storage,CAES)作为一种大规模长时性物理储能技术,以其运行寿命长、储能规模大、响应速度快等显著优势,在提升能源利用效率、缓解可再生能源波动性、增强电力系统安全性和经济性等方面展现出重要作...压缩空气储能(Compressed Air Energy Storage,CAES)作为一种大规模长时性物理储能技术,以其运行寿命长、储能规模大、响应速度快等显著优势,在提升能源利用效率、缓解可再生能源波动性、增强电力系统安全性和经济性等方面展现出重要作用,是我国大力发展的战略性新兴产业。本研究基于CNKI和Web of Science数据库1985—2023年地下CAES领域的相关文献,利用VOSviewer、CiteSpace科学知识图谱软件和Origin软件,回顾了地下CAES的研究背景,并对科学生产力量、研究热点和演化趋势进行了全面分析。研究内容涵盖从盐穴到人工硐室再到废弃矿井等多种储气方式,揭示了地下CAES领域的发展现状与未来方向。研究表明,地下CAES在“双碳”目标和现代化国家能源布局升级的推动下,发展势头强劲,新型储气方式不断涌现,包括盐穴、人工硐室、废弃矿井、枯竭油气藏和地下含水层等。研究热点主要集中在盐穴、人工硐室和废弃矿井3种储气方式,盐穴储能因其低渗透率、优异的流变性和自愈能力,成为全球关注的重点方向。人工硐室则以密闭性好、承压能力强而逐渐受到重视,但其建库成本和技术难度较高。废弃矿井以资源丰富、分布广泛、成本低廉成为潜在储能方案,但在气密性和稳定性等方面仍需进一步突破。从科学网络视角分析,我国地下CAES研究团队已形成显著的国际影响力,但学者间的合作多集中于同一机构或课题组,跨机构协作有待加强。未来需强化学术合作网络,推动多学科交叉研究,以加速技术创新与应用。政策层面,我国已逐步建立支持CAES产业发展的政策体系,相关政策激励将进一步促进地下CAES的规模化发展。总体来看,地下CAES技术将在优化能源结构、提升能源储备能力、保障能源战略安全和实现“双碳”目标中发挥不可或缺的重要作用。展开更多
基金supported by the CNPC Major Science and Technology Project“Research and Application of Key Technologies in Geology and Gas Reservoir Engineering of Underground Gas Storage”(No.:2015E-400201).
文摘Salt-cavern underground gas storage is technically faced with non-uniform distribution of stratified salt rocks,complex solution mining mechanism,difficult control of solution mining process,less operation safety and stability of caverns and difficult reconstruction and utilization of old caverns.In view of these technical difficulties,the design concept was fully updated based on the design experience and field practice of Jintan gas storage in Jiangsu,for purpose of maximizing salt layer utilization ratio,improving solution mining efficiency,shortening construction time and ensuring cavity safety.Based on the updated design concept,five series of key technologies were proposed in site evaluation,cavern design and control,stability assessment and storage capacity parameter design,old cavern screening and utilization,and gas storage operation and monitoring.The following results were obtained from the actual application of these key technologies to the Jintan gas storage.First,the actual drilling coincidence rate of geological program is high.Second,the cavern is morphologically coincident with the design.Third,the cavern deformation retract rate is in line with the stability evaluation result.Fourth,old caverns are successfully reconstructed and utilized.Fifth,the arrangement of the monitoring network ensures the operation safety of salt-cavern underground gas storage and makes an important contribution to the peak shaving and supply guarantee of natural gas in the Yangtze River Delta region.In conclusion,the research results provide guidance for the design and engineering implementation of salt-cavern underground gas storage construction program,as well as a theoretical and technical support for the construction of similar gas storages.
基金supported by the CNPC Major Science and Technology Project,“Site Selection and Geological Evaluation Technology of Gas Storage”(No.:2012B-3309)。
文摘In order to meet the demand of constructing salt-cavern underground gas storages(UGSs)in favorable salt mines for the regions that are neither major oil and gas production zones nor major natural gas consumer markets in South China,and solve the problems of unclear conditions for selecting salt-cavern gas storage sites and of inconsistent content and depth in evaluating gas storage conditions,based on investigation and analysis of salt-cavern UGS data in China and other countries,we proposed the principles of selecting gas storage sites in combination with geology and ground surface conditions,and developed a set of technologies in evaluating construction conditions for salt-cavern gas storages.By applying the selection principles of salt-cavern UGSs,we selected and sorted some salt mines in the three major natural gas consumer markets(the Yangtze River Delta,CentraleSouth China,and Southeast Coast of China),and evaluated the conditions of constructing a gas storage in the Huai'an salt mine with better conditions.The following findings were obtained.First,the principles of selecting gas storage sites can be applied to quickly optimize and sort the selected targets,including 6 items of geological factors such as structure,burial depth,salt-bearing layer thickness,NaCl content,top rock,and reserves,and 3 other items such as ground surface conditions,water source and brine,distance from pipeline networks.Second,the evaluation system of UGS construction conditions integrates features of structure and salt-bearing strata,tightness,firmness,dissolubility evaluation,prediction of gas storage scale,and analysis of cavity making condition.In conclusion,the new evaluation technologies can not only effectively guide the site selection and evaluation of salt-cavern UGSs but provide foundation and power support for their scheme designs,and the presented pilot proposal for utilizing thick interlayers has achieved a perfect on-site application effect.This study is of great significance for constructing UGSs in China.
文摘压缩空气储能(Compressed Air Energy Storage,CAES)作为一种大规模长时性物理储能技术,以其运行寿命长、储能规模大、响应速度快等显著优势,在提升能源利用效率、缓解可再生能源波动性、增强电力系统安全性和经济性等方面展现出重要作用,是我国大力发展的战略性新兴产业。本研究基于CNKI和Web of Science数据库1985—2023年地下CAES领域的相关文献,利用VOSviewer、CiteSpace科学知识图谱软件和Origin软件,回顾了地下CAES的研究背景,并对科学生产力量、研究热点和演化趋势进行了全面分析。研究内容涵盖从盐穴到人工硐室再到废弃矿井等多种储气方式,揭示了地下CAES领域的发展现状与未来方向。研究表明,地下CAES在“双碳”目标和现代化国家能源布局升级的推动下,发展势头强劲,新型储气方式不断涌现,包括盐穴、人工硐室、废弃矿井、枯竭油气藏和地下含水层等。研究热点主要集中在盐穴、人工硐室和废弃矿井3种储气方式,盐穴储能因其低渗透率、优异的流变性和自愈能力,成为全球关注的重点方向。人工硐室则以密闭性好、承压能力强而逐渐受到重视,但其建库成本和技术难度较高。废弃矿井以资源丰富、分布广泛、成本低廉成为潜在储能方案,但在气密性和稳定性等方面仍需进一步突破。从科学网络视角分析,我国地下CAES研究团队已形成显著的国际影响力,但学者间的合作多集中于同一机构或课题组,跨机构协作有待加强。未来需强化学术合作网络,推动多学科交叉研究,以加速技术创新与应用。政策层面,我国已逐步建立支持CAES产业发展的政策体系,相关政策激励将进一步促进地下CAES的规模化发展。总体来看,地下CAES技术将在优化能源结构、提升能源储备能力、保障能源战略安全和实现“双碳”目标中发挥不可或缺的重要作用。
