乙二胺-HPAM与NaOH-HPAM体系提高稠油采收率的对比  

A Comparison Between the Enhanced Heavy Oil Recoveries of Ethylenediamine-HPAM and NaOH-HPAM Systems

作　　者：陈泽华 赵修太 王增宝 马汉卿 陈文雪 

机构地区：[1]中国石油大学石油工程学院,山东青岛266580

出　　处：《石油学报（石油加工）》2015年第5期1156-1163,共8页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家重大科技专项(2011ZX05002-005);中央高校基本科研业务费专项资金(27R1202006A)资助

摘　　要：研究了NaOH-HPAM、乙二胺-HPAM两种体系与稠油间的界面张力,以及体系的乳化性能、黏度、驱油效率和微观驱替机理。结果表明,在质量分数0.65%的NaCl溶液中,乙二胺降低油-水界面张力的能力强于NaOH,乙二胺-HPAM体系的黏度远高于NaOH-HPAM体系。乙二胺与稠油容易形成较稳定的水包油乳状液,而NaOH与稠油形成的乳状液中的油滴会迅速聚并。这主要是由于乙二胺与石油酸形成不同类型表面活性剂和不增加矿化度的结果。由于聚合物的增黏作用,两种体系都能获得较大的波及系数。同时,在油湿情况下,乙二胺-HPAM溶液能够渗入稠油形成不连续水滴,不连续水滴中包含大量被乳化的小油滴,出现二重乳化现象,且在后续驱替中产生明显的乳化携带作用。NaOH-HPAM溶液也能渗入稠油形成不连续水滴,但由于乳化携带作用差,洗油效率较低。综合对比,乙二胺-HPAM和NaOH-HPAM相比在提高采收率中有较大优势,且有机碱有较大的应用前景。a comparative study of the oil-water IFT,emulsification properties, viscosity,displacement efficiency and micromodel displacement mechanism was conducted for the systems of ethylenediamine（EDA）-HPAM and NaOH-HPAM.The results showed that the ability of EDA to reduce IFT was stronger than that of NaOH in NaCl solution of mass fraction 0.65%.The viscosity of EDA-HPAM was higher than that of NaOH-HPAM.EDA can emulsify the heavy oil to create stable O/W emulsion,while the oil droplets of the emulsion created by NaOH and heavy oil could coalesce together rapidly,due to the different in-situ surfactant and no salinity addition created by EDA.The EDA-HPAM solution could penetrate into oil phase to create discontinuous water droplets containing some small emulsified oil droplets,and then the subsequent water phase could carry much oil droplets to recovery oil.Although NaOH-HPAM solution could also penetrate into oil to create discontinuous water droplets,the effectiveness of entrainment was slight and the displacement efficiency was low.Accordingly,EDA-HPAM has an advantage in oil recovery over NaOH-HPAM system.Moreover,organic alkaline has a good application prospect.

关 键 词：乙二胺-HPAM NaOH-HPAM 矿化度 界面张力 乳化性能 黏度 捕集 乳化携带 

分 类 号：TE39[石油与天然气工程—油气田开发工程]