摘要
三元复合驱具有良好的驱油效果,比水驱可提高采收率20%以上。但由于强碱化学剂的注入,使三元复合驱注采系统产生了严重的结垢现象,影响了油田生产的正常运行。对大庆油田三元复合驱的代表性垢样进行了成分分析,结果表明,三元复合驱结垢物的主要成分为钙镁碳酸盐、硅酸盐、管线腐蚀产物和有机质,且结垢遵循以下规律:采出井同一部位,随着时间的变化碳酸盐含量逐渐降低,硅酸盐含量增加;同一时间,从井口到井底,碳酸盐含量降低,硅酸盐含量增加。根据结垢特点提出了油田防垢除垢的可行性建议。
Alkali-surfactant-polymer （ASP） flooding is of better effect for oil displacement than water flooding by EOR of over 20%. Because of the injection of alkali, the injection-production system by ASP flooding process is normally impacted by serious scaling of the wells, which is unfavorable for normal production of a field. This paper analyzes the representative scaling sample from ASP flooding in Daqing oil field. The result shows that the main components of the scaling are calcium and magnesium carbonates, silicate, pipeline corrosion product and organic matters, etc. and the scaling follows such regularities as： the carbonate content is gradually decreased with time in the same position of production well, but that of silicate is increased; the carbonate content is decreased, the silicate content is gradually increased from wellhead to wellbottom at the same time interval. The feasible suggestions are put forward on the basis of the scaling characteristics.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2010年第1期78-80,共3页
Xinjiang Petroleum Geology
关键词
大庆油田
三元复合驱
注采井
结垢
规律
Daqing oil field
ASP flooding
production well
scaling
regularity
