聚合物溶液在油藏孔隙中的流动及微观驱油机理  

Viscoelastic flow and microscopic displacement mechanism of polymer solution in reservoir pores

作　　者：岳湘安[1] 张立娟[1] 刘中春[1] 侯吉瑞[1] 夏慧芬[2] 

机构地区：[1]石油大学 [2]大庆石油学院

出　　处：《油气地质与采收率》2002年第3期4-6,共3页Petroleum Geology and Recovery Efficiency

摘　　要：研究了粘弹性聚合物溶液在盲端孔隙模型中的流动与驱替特性。微观流动实验和数值计算结果均表明 ,随着聚合物溶液粘弹性增强 (Weissenberg数增大 ) ,在孔隙盲端及喉道中的粘弹性涡流加剧 ,涡流区域也随之扩大 ;计算得到的粘弹涡特征与Cochrane等给出的实验结果在定性规律上是一致的。这种粘弹涡可将孔隙盲端和喉道中的部分残余油分散成油滴或油丝并携带至主流区 ,使之成为可驱动原油。所以 。The flow and displacement characteristics of the viscoelastic polymer solution in the pore model with blind ends are studied. Both microscopic flow experiments and numerical calculation results show that the strength and depth of viscoelastic eddy in the blind ends and throats increase with the increase of Weissenberg number, and this is qualitatively consistent with the experiment results given by Cochrane et al. The part of remaining oil in the blind ends and throats can be dispersed into oil droplets and transported to the main stream by the viscoelastic eddy. It is quite evident that the viscoelastic eddy effect should be the mechanism of increasing microscopic displacement efficiency in polymer flooding.

关 键 词：聚合物溶液 油藏孔隙 聚合物驱油 粘弹性流动 微观驱油机理 T型微流道 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]