西南石油大学学报(自然科学版) ›› 2009, Vol. 31 ›› Issue (5): 135-138.DOI: 10.3863/j.issn.1674-5086.2009.05.029

• 油气化学工程与化工 • 上一篇    下一篇

聚合物对石油磺酸盐体系驱油效率的影响

李阳1,2 段友智1

  

  1. 1.中国石油大学(华东)石油工程学院,山东东营257061;2.中国石化油田勘探开发事业部,北京朝阳100728
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-10-20 发布日期:2009-10-20

INFLUENCE OF POLYMER ON OIL DISPLACEMENT EFFICIENCY OF PETROLEUM SULFONATES SYSTEM

LI Yang1,2 DUAN You-zhi1   

  1. 1.School of Petroleum Engineer,China University of Petroleum,Dongying Shandong 257061,China;2.Oilfield Exploration & Production Department,SINOPEC,Chaoyang Beijing 100029,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-10-20 Published:2009-10-20

摘要: 以部分水解聚丙烯酰胺为例,考察聚合物对石油磺酸盐油/水体系的动态及平衡界面张力的影响,验证了在该体系中加入一定浓度范围内的聚合物只改变该体系界面张力达到平衡所需要的时间和变化过程,不影响该体系的洗油能力。改变聚合物和石油磺酸盐驱油体系注入顺序和方式的室内模拟驱油和驱替吸附实验表明,聚合物驱后再进行石油磺酸盐驱油体系可获得更高的驱油效率。通过动态吸附实验分析其原因在于滞留的聚合物通过氢键作用在岩石表面的吸附减少了岩石表面可吸附石油磺酸盐的吸附位,石油磺酸盐在地层表面的吸附损失减少;比较聚合物及石油磺酸盐的混溶体系,残留聚合物与石油磺酸盐通过疏水缔合作用所形成的缔合体数量较少,均相对增加了石油磺酸盐可吸附于油水界面上的分子数量,从而获得较高的驱油效率。

关键词: 残留聚合物, 石油磺酸盐, 平衡界面张力, 吸附损失, 缔合体, 驱油效率

Abstract: The effect of polymer,such as partially hydrolyzed polyacrylamide,on the dynamic and equilibrium interfacial tension of petroleum sulfonates and oil/water systems is examined.It is testified that polymer added in a certain concentration scope in the system only prolongs the time which the system needs to reach at the equilibrium interfacial tension,but the ability of the system for washing oil is not influenced.The simulation test by changing the injection sequence or injection mode of polymer and petroleum sulfonate indicates that the maximum oil displacement efficiency is acquired by the injection mode in which the petroleum sulfonate solution is injected after polymer flooding.The main reason is the decrease of adsorption site on the surface of rock for the adsorption of partially hydrolyzed polyacrylamide by hydrogen bond and the reduction of association body formed by polar group,so the loss of petroleum sulfonate in the core is decreased,as a result,the oil displacement efficiency of petroleum sulfonate for enhanced oil recovery is relatively increased.

Key words: residual polymer, petroleum sulfonates, equilibrium interfacial tension, adsorption loss, association body, displacement efficiency

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