新型在线自聚集调驱体系封堵及驱油效果  

NEW ON-LINE SELF-AGGREGATION PROFILE CONTROL DISPLACEMENT SYSTEM AND ITS PLUGGING CHARACTERISTICS AND OIL DISPLACEMENT EFFECT

作　　者：王浩颐 冀文雄 常振[1] 铁磊磊[1] 李翔[1] 乔奇琳 曾浩见[1] Wang Haoyi;Ji Wenxiong;Chang Zhen;Tie Leilei;Li Xiang;Qiao Qilin;Zeng Haojian(China Oilfield Services Limited,Tianjin 300459,China)

机构地区：[1]中海油田服务股份有限公司,天津300459

出　　处：《精细石油化工》2022年第5期10-14,共5页Speciality Petrochemicals

基　　金：中海油集团公司科技项目(E-23217004)。

摘　　要：针对“强注强采”导致的强水窜油藏的稳油控水问题,通过低温反相聚合技术制备了纳米微球和双层聚合物微球,并复配形成新型在线自聚集调驱体系,考察了体系的耐温性及其粒径变化、注入性、封堵性以及对采收率的影响,分析了体系的作用原理。结果表明,该体系质量浓度为5 g/L,在温度90℃、矿化度34 g/L的模拟盐水中自聚集后耐温超过120 d,粒径可达130μm,对渗透率为5000 mD的人造岩心具有很好的封堵性能和运移能力,单管均质岩心和双管非均质岩心驱油实验采收率增幅分别为4.1%和10.6%,具有较好的提高采收率性能。Aiming at the problem of stabilizing oil and water control in strong water channeling reservoirs caused by“strong injection and strong production”,nano-microspheres and double-layer polymer microspheres were prepared by low-temperature reversed-phase polymerization technology.A new type of on-line self-aggregation profile control and displacement system was formed by compounding the prepeared nano-microspheres and double-layer polymer microspheres.The temperature resistance of this system and its particle size change,injection performance,plugging performance and its effect on recovery factor were studied,and the working principle of the system was also analyzed.The results show that the particle size of the system with a concentration of 5 g/L can reach 130μm after self-aggregation in simulated brine with a temperature of 90℃and a salinity of 34 g/L for more than 120 d,showing good plugging performance and migration capability.The single homogeneous and double-pipe heterogeneous core flooding experiments have a recovery rate increase of 4.1%and 10.6%,respectively,which have good enhanced oil recovery performance.

关 键 词：新型在线自聚集调驱体系 聚集特性 封堵特性 驱油效果 提高采收率 

分 类 号：TE348[石油与天然气工程—油气田开发工程]