胜利油田高温高盐油藏化学驱提高采收率技术进展  

Progress in enhanced oil recovery technologies through chemical flooding in high-temperature and high-salinity reservoirs in Shengli Oilfield

作　　者：元福卿 于群[1] 陈兴锋 郭淑凤[1] 赵方剑[1] 徐辉[1] 李菲菲 YUAN Fuqing;YU Qun;CHEN Xingfeng;GUO Shufeng;ZHAO Fangjian;XU Hui;LI Feifei(Exploration and Development Research Institute,Shengli Oilfield Company,SINOPEC,Dongying City,Shandong Province,257015,China)

机构地区：[1]中国石化胜利油田分公司勘探开发研究院,山东东营257015

出　　处：《油气地质与采收率》2024年第5期199-208,共10页Petroleum Geology and Recovery Efficiency

基　　金：中国石化重点科技项目“非均相复合驱大幅度提高采收率技术研究与应用”之“非均相复合驱技术应用与示范”(P23246)。

摘　　要：胜利油田化学驱资源丰富,但由于储层非均质性强、油藏温度高、地层水矿化度高、钙镁离子含量高和原油黏度高等问题,化学驱技术实施难度较大。历经多年攻关,创建了高温高盐油藏化学驱理论,形成了聚合物驱、无碱二元复合驱、非均相复合驱和降黏复合驱等化学驱技术系列,解决了地层温度为85℃、地层水矿化度为30000 mg/L、钙镁离子质量浓度为1500 mg/L、地层原油黏度为1000 mPa·s以内油藏大幅度提高采收率的难题。基础理论方面,阐明了“变形通过、液流转向、均衡驱替、调洗协同”的非均相复合驱提高采收率机理,取得了高黏油藏化学驱“黏弹性并重”与“大幅度降低黏附功”的重要认识。技术应用方面:针对海上油田大幅度提高采收率技术难题,研制了高效二元复合驱油体系,设计了全密闭配注工艺,形成了海上油田二元复合驱技术;针对聚合物驱后油藏与高温高盐油藏条件,发明了黏弹性颗粒驱油剂,研发了非均相复合驱油体系,创建并发展了非均相复合驱技术;针对高黏油藏,研发了高黏弹聚合物和高效表面活性剂,研制了降黏复合驱油体系,形成了高黏油藏无碱二元复合驱技术。截至2023年10月,胜利油田高温高盐油藏化学驱技术已动用石油地质储量达6.3×10^(8)t,累积产油量为7701×10^(4)t,累积增油量为3604×10^(4)t,为胜利油田持续稳产、高质量发展提供了强力支撑。Shengli Oilfield has abundant chemical flooding resources.However,the implementation of chemical flooding technolo-gies is difficult due to strong reservoir heterogeneity,high reservoir temperature,high formation water mineralization,high cal-cium and magnesium ion content,and high crude oil viscosity.After years of research and development,the theory of chemical flooding for high-temperature and high-salinity reservoirs has been established,forming a series of chemical flooding technologies such as polymer flooding,alkali-free binary compound flooding,heterogeneous compound flooding,and viscosity-reducing com-pound flooding.These technologies have significantly enhanced oil recovery in reservoirs with a formation temperature of 85℃,a formation water mineralization of 30000 mg/L,a calcium and magnesium ion concentration of 1500 mg/L,and a crude oil viscos-ity of 1000 mPa·s.In terms of basic theory,the mechanism of heterogeneous compound flooding was elucidated with“deforma-tion passage,fluid flow diversion,balanced displacement,and coordinated transfer and washing”to enhance oil recovery,and an essential understanding of“simultaneously increasing viscosity and elasticity”and“significantly reducing adhesion work”was ob-tained during chemical flooding in high-viscosity reservoirs.In terms of technical application,in response to the technical difficul-ties of significantly enhancing oil recovery in offshore oilfields,an efficient binary compound oil displacement system was con-structed,and a fully enclosed injection process was designed,forming a binary compound flooding technology for offshore oil-fields.For reservoirs after polymer flooding and high-temperature and high-salinity reservoirs,a viscoelastic particle oil displace-ment agents were invented,and a heterogeneous compound flooding system was constructed.In addition,heterogeneous compound flooding technology was developed.For high-viscosity reservoirs,highly viscoelastic polymers and efficient surfactants were devel-oped,and a viscosity-reduc

关 键 词：化学驱 海上油田二元复合驱 非均相复合驱 高黏油藏化学驱 胜利油田 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]