摘要
聚合物溶液黏弹性能够提高微观驱油效率.水驱后残余油流动表明聚合物驱使孔隙中残余油的界面发生了变化.通过室内油滴界面的变形运移实验,运用界面热力学原理探讨了油相界面变形运移的深层原因,分析了油滴在不同性质溶液中界面受力的情况.结果表明:流动的清水、表活剂溶液、甘油溶液对油滴界面没有拉拽作用,而聚合物溶液对油滴界面有拉拽作用;聚合物溶液的黏弹性拉力可以使油相界面呈锥形突起,锥形前端界面不断运移形成细丝状;提高聚合物驱微观驱油效率应增加聚合物溶液的黏弹性拉力并降低界面张力.
The polymer solution with viscous-elastic behavior is able to increase microcosmic oil displacement efficiency. The residual oil movement indicates that the oil interface has been changed in the pores by polymer flooding. The inner cause of oil interface change is explored by the experiments of oil interface and by the knowledge of the interfacial thermodynamics, analyzing the interfacial pulling force of a oil drop in the different solutions. The flow water、surfactant solution and glycerine solution have no pull effects on the interface of a oil drop; But polymer solution has a strong pull effect on the interface of a oil drop. The oil interface can be coned by the viscous-elastic pulling force of polymer solution and the front cone interface is moving to form a oil thread. The methods of increasing microcosmic oil displacement efficiency include the increasing of the viscous-elastic pulling force of polymer solution and the decreasing of oil interfacial tension.
出处
《大庆石油学院学报》
CAS
北大核心
2005年第4期36-39,共4页
Journal of Daqing Petroleum Institute
关键词
聚合物驱
界面变形
黏弹性
界面张力
表活剂
polymer flooding
interface change
viscous-elastic behavior
interfacial tension
surfactant
