西安石油大学学报（自然科学版）2026，Vol.41Issue(2)：57-65,9.DOI:10.3969/j.issn.1673-064X.2026.02.007
高含水稠油油藏CO2复合体系驱油机理
Research on Effect Mechanism of CO2 Composite System in High Water-cut Heavy Oil Reservoirs
摘要
Abstract
Taking a low-permeability ordinary heavy oil reservoir in the middle and deep layers of Daqing Oilfield as an example,the key mechanisms of enhancing oil recovery by CO2 composite systems(CO2 with foaming agent and CO2 with polymer solution)were ex-plored through laboratory experiments.The injection parameters of the composite systems were optimized using numerical simulation method,and their application effect was predicted.The research results indicate that the dissolution of CO2 in crude oil can fully utilize its energy-increasing and viscosity-reducing effects,with a pressure increase of up to78%and a viscosity reduction rate of up to48%.Injecting the plug of CO2 with foaming agent or CO2 with polymer solution into production wells has good adaptability to low-permeabili-ty,heterogeneous,and high water-cut heavy oil reservoirs after water flooding.It has the effects of pressure increase,water control,profile control,and oil enhancement,but the timing,stability,target,and effect of the two CO2 composite systems are different.It is recommen-ded to use the plug of CO2 and polymer solution to seal high water-cut oil wells.The suitable CO2 injection intensity is around 37.5 t/m,and the injection intensity of polymer solution is around 175 t/m.The on-site application effect shows that compared to water flood-ing,injecting CO2 composite system can increase the production of high water-cut heavy oil reservoirs by 2.2 times and reduce the water cut by 18.5%.关键词
低渗透/稠油/高含水/CO2与聚合物/提高采收率机理Key words
low permeability/heavy oil reservoir/high water-cut oil reservoir/CO2 composite system/enhanced oil recovery mechanism分类
能源科技引用本文复制引用
张脊,魏建光,张德龙,李江涛,蒋佳骏,徐庆..高含水稠油油藏CO2复合体系驱油机理[J].西安石油大学学报（自然科学版）,2026,41(2):57-65,9.基金项目
黑龙江省"揭榜挂帅"科技攻关项目"缝网压裂致密储层与二氧化碳结合提高采收率机理研究"(20232XT06A02) （20232XT06A02）
新一轮黑龙江省"双一流"学科协同创新成果项目"多功能压裂液体系及页岩油井提产关键技术研发与产业化应用"(LJGXCG2024-P13) （LJGXCG2024-P13）
