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利用搅拌发泡法研究了磺基甜菜碱氟碳表面活性剂-聚合物二元复合体系的起泡高度和泡沫半衰期,确定了一种可用于提高原油采收率的泡沫驱油体系——磺基甜菜碱氟碳表面活性剂（FS）/α-烯烃磺酸盐（AOS）（质量比为1∶5（质量分数为0.2%的FS/AOS溶液））＋1000 mg/L部分水解聚丙烯酰胺（HPAM,分子量为1000万）。用该体系进行泡沫驱油室内填砂管驱替实验研究,在45℃,交替注入0.25 PV的FS/AOS/HPAM驱油体系和0.25 PV的氮气进行驱油实验,所用原油45℃黏度为950 mPa.s,结果表明,注入复合段塞后,注采压差迅速上升,可在水驱基础上提高原油采收率32.06%,最终采收率可达80.79%。

The flooding system was determined according to the foam properties（bubble height and halflife） using stirring method： sulfobetaine fluorocarbon surfactant（FS）∶sodium alpha-olefin sulfonate（AOS） = 1∶5（0.2% FS/AOS solution）＋1000 mg/l hydrolyzed polyacrylamide（HPAM）（molecular weight 10 million）.The laboratory experiment was carried out by alternately injecting FS/AOS/HPAM displacing system and nitrogen gas for 0.25 PV each at 45 ℃ using sand packed displacement apparatus.The viscosity of the crude oil is 950 mPa·s at 45 ℃.The results show that the injection-production pressure difference increases rapidly after injection of the flooding system,the recovery ratio is increased by 32.06% compared with water flooding,and the final recovery is as high as 80.79%.