聚合物驱与多元驱替微观实验对比与机理研究  

Micro-model Experiment Comparison of Polymer,Polymer-Surfactant and Alkali-Surfactant-Polymer flooding

作　　者：王金杰 李亚军[1] 宫侯健 李润虎[2] 董明哲[1] 

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266580 [2]中国石油长庆油田分公司第一采油厂,陕西延安716000

出　　处：《油田化学》2015年第3期401-405,410,共6页Oilfield Chemistry

基　　金：国家自然科学基金"油气水三相微观-连续介质三维流动模拟研究"(项目编号51274225)"缝洞型介质等效连续模型油水两相流动模拟理论研究"(项目编号51204198);973项目"中国东部古近系陆相页岩油富集机理与分布规律"(项目编号2014CB239103);中央高校基本科研业务费专项资金"页岩气渗流机理及有效动用条件研究"(项目编号14CX05021A)

摘　　要：利用非均质微观刻蚀可视化玻璃模型,模拟油层不同驱替剂(聚合物P体系、表面活性剂-聚合物SP体系,以及碱-表面活性剂-聚合物ASP体系)的驱油效果,观察不同注入体系引起的油层油滴的变化及运移、再分布动态,研究不同注入体系对剩余油分布的影响,进一步根据剩余油分布及微观模型基本参数得到地层油采出程度和采收率,P驱、SP二元驱及ASP三元驱微观驱替的采收率分别为43%、59%和92%。聚合物的调剖作用、表面活性剂的乳化降黏作用、碱引起的超低界面张力、润湿反转及形成油膜等现象均在实验过程中得到验证并详细解释和分析。综合对比分析实验结果认为,碱/表面活性剂/聚合物ASP三元驱替仍将是化学驱提高采收率的重要措施。Comparison of micro-model experiments among Polymer, Polymer-Surfactant and Alkali-Surfactant-Polymer flooding were conducted on anisotropic micro-model, modeling oilfield production from different chemical flooding. Via micro-model flooding, the oil drop shape change-transfer-redistribute was observed. Furthermore, through calculating and counting, the oil recovery of these three ways were obtained, being of 43%, 59% and 92% , respectively, for Polymer, Polymer-Surfactant and Alkali-Surfaetant-Polymer flooding, respectively. The phenomenon of profile control, emulsification, ultralow interracial tension, and wettability reversal was specifically described. In the end, the conclusion was drawn that alkali-surfactant-polymer flooding still would be the major component of chemical flooding.

关 键 词：非均质微观模型 可视化 化学驱 提高采收率 驱油机理 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]