CO_(2)化学驱在提高传统天然气采收率中的应用与优化  

Application and Optimization of CO_(2) Chemical Flooding in Improving Traditional Natural Gas Recovery Rate

作　　者：王振川 钱钰 折印楠 李锦源 寇枫 李司 WANG Zhenchuan;QIAN Yu;ZHEYinnan;LI Jinyuan;KOU Feng;LI Si(Shaanxi Yanchang Petroleum(Group)Co.,Ltd.,Gas Field Company,Yan'an Shaanxi 716000,China;Changqing Oilfield Branch No.2Gas Production Plant,Yulin Shaanxi 719000,China;Shaanxi Yanchang Petroleum International Energy and Chemical Co.,Ltd.,Xi'an Shaanxi 710000,China;Northwest University,Xi'an Shaanxi 710069,China)

机构地区：[1]陕西延长石油(集团)有限责任公司气田公司,陕西延安716000 [2]长庆油田分公司第二采气厂,陕西榆林719000 [3]陕西延长石油国际能源化工有限公司,陕西西安710000 [4]西北大学,陕西西安710069

出　　处：《当代化工》2025年第2期270-274,共5页Contemporary Chemical Industry

基　　金：国家自然科学基金项目(项目编号:52064226)。

摘　　要：随着全球对清洁能源需求的增加,提高传统天然气藏采收率成为能源开发领域的重要课题。采用岩心模拟实验方法,系统地探讨了CO_(2)化学驱在提高天然气采收率方面的效果。结果表明:在CO_(2)注入压力从1.0 MPa增加到5.5 MPa的过程中,CO_(2)的溶解量从5.50%增加到23.54%,而天然气释放量从9.07%增加到43.18%,显示出随着注入压力的增加,CO_(2)的溶解效率显著提高,促进了更多天然气的释放。此外,研究发现,在适当增加CO_(2)注入量的条件下,天然气采收率可以从11.0%增加到69.5%,进一步证实了CO_(2)注入量对天然气采收率的显著影响。综合性能评价结果显示,CO_(2)注入与水淹联合技术在提高采收率、降低环境影响以及优化能耗方面表现最为优异,其成本效益比达到3.03,CO_(2)减排效果为1570 t·a^(-1),能耗为432 k W·h·t^(-1)。As the global demand for clean energy increases,improving the recovery rate of traditional natural gas reservoirs has become an important issue in the field of energy development.Usingcore simulation experiment methods,the effect of CO_(2) injection technology in improving natural gas recovery was systematically explored.The experimental results showed that when the CO_(2) injection pressure increased from 1.0 MPa to 5.5 MPa,the dissolved amount of CO_(2) increased from 5.50%to 23.54%,while the natural gas release amount increased from 9.07%to 43.18%,showing that as the injection pressure increased,the dissolution efficiency of CO_(2) was significantly improved,promoting the release of more natural gas.In addition,itwas found that with an appropriate increase in CO_(2) injection volume,natural gas recovery could be increased from 11.0% to 69.5%,further confirming the significant impact of CO_(2) injection volume on natural gas recovery.Comprehensive performance evaluation results showed that the combined technology of CO_(2) injection and flooding performed best in improving recovery,reducing environmental impact,and optimizing energy consumption.Its cost-benefit ratio reached 3.03,and the CO_(2) emission reduction effect was 1 570 t·a^(-1),energy consumption was 432 k W·h·t^(-1).

关 键 词：CO_(2)注入技术 天然气藏 采收率 优化策略 

分 类 号：TE341[石油与天然气工程—油气田开发工程]