天然气工业2025，Vol.45Issue(9)：19-32,14.DOI:10.3787/j.issn.1000-0976.2025.09.002
四川盆地卧龙河气田CO2-EGR先导试验新进展
Latest progress of CO2-EGR pilot test in the Wolonghe Gas Field of the Sichuan Basin
摘要
Abstract
CO2-EGR is of strategic and practical significance to the efficient development of natural gas and the alleviation of greenhouse effect.At present,however,the CO2-EGR engineering practice in China is still in the exploratory stage,and needs sufficient researches to support the implementation of pilot test.In this paper,domestic and foreign understanding and progress of CO2-EGR technologies are systematically reviewed.Then,based on the progress of the CO2-EGR pilot test in the Wolonghe Gas Field of the Sichuan Basin,the challenges to the implementation of CO2-EGR technologies in this basin are analyzed deeply.Finally,the development directions of CCUS-EGR technologies are predicted.And the following research results are obtained.First,the technological mechanisms of CO2-EGR mainly include pressurized energy replenishment and displacement,gravity segregation,viscosity difference assisted displacement,predominant adsorption replacement,dissolution reconstruction,and water invasion inhibition.Second,CO2-water-rock interactions promote the dissolution of calcite in carbonate rocks,thereby altering reservoir porosity and permeability.Third,CO2 has a certain water blocking effect,and especially supercritical CO2 exhibits stronger water blocking.Compared with pure CO2,the CO2 system with impurities is less different from CH4 in terms of physical properties,and the higher the impurity content,the smaller the difference in physical properties.Fourth,to achieve better CO2-EGR effect,it is necessary to take pure CO2 as the injection medium and ensure CO2 to be in the supercritical state.In conclusion,the pilot test design of CCUS-EGR in the Wolonghe Gas Field of the Sichuan Basin presents the features of"fine design concept of gas reservoir engineering","innovative test arrangement of north-south zoning"and"optimization and phase control of injection medium",and a set of CO2-EGR implementation scheme with integrated adaptability process,injection-production design and economic demonstration is prepared.What's more,it is necessary to tackle key technological bottlenecks,construct a CO2-EGR sink and source network,form information-based whole process monitoring,and work out risk identification and control measures,so as to promote the further development of CO2-EGR field test.关键词
四川盆地/卧龙河气田/先导试验/CO2-EGR/技术机理/碳达峰碳中和/CO2封存/能源安全Key words
Sichuan Basin/Wolonghe Gas Field/Pilot test/CO2-EGR/Technical mechanism/Carbon peak and carbon neutrality/CO2 storage/Energy security分类
能源科技引用本文复制引用
何新兴,甘笑非,杨长城,金亦秋,赵梓寒,曹成,张烈辉,赵玉龙..四川盆地卧龙河气田CO2-EGR先导试验新进展[J].天然气工业,2025,45(9):19-32,14.基金项目
国家自然科学基金区域创新联合基金重点项目"四川盆地有水气藏CO2驱提高采收率及其有效封存研究"(编号:U23A2022)、国家自然科学基金委联合基金项目"枯竭气藏二氧化碳埋存多场耦合运移规律及智慧安全监测评价"(编号:U23B20160)、四川省自然科学基金项目"深层海相碳酸盐岩气藏注CO2提高采收率协同碳封存机理研究"(编号:2025ZNSFSC1357)、重庆市自然科学基金面上项目"多元杂质影响下CO2-地层水-泥岩作用机理及盖层封闭性演化机制"(编号:CSTB2024NSCQ-MSX0951)、油气藏地质及开发工程全国重点实验室开放基金项目"咸水层含杂质CO2-水-岩作用机制与封存潜力评价方法研究"(编号:PLN2023-28). （编号:U23A2022）
