交替注入聚合物驱油的水动力学机理  

HYDRODYNAMIC OIL-FLOODING MECHANISM OF ALTERNATING POLYMER

作　　者：杨树人[1] 于超[1] 刘丽丽[1] 徐迪[1] 

机构地区：[1]东北石油大学流体力学教研室

出　　处：《大庆石油地质与开发》2014年第3期118-121,共4页Petroleum Geology & Oilfield Development in Daqing

基　　金：“973”国家重点基础研究发展计划项目(2005CB221304)

摘　　要：为了计算交替注入聚合物溶液对残余油的作用力,进一步从水动力学角度探索交替注入聚合物溶液提高原油采收率的机理,运用上随体Maxwell本构方程建立了具有黏弹性的聚合物溶液在微孔道中的流动方程,运用数值方法对流场进行了求解,获得了驱替液作用在残余油膜上的应力分布,分析了聚合物溶液的黏弹性和压力梯度与水平驱替力这一表征驱替效果的关系,最终分析了交替注入聚合物段塞可以提高原油采收率的机理.In order to calculate the force of alternately injecting polymer solution on the residual oil and further ex- plore the mechanism of the solution to enhance oil recovery from the viewpoint of the hydrodynamics, the flowing e- quation of the viscoelastic polymer solution in the micro pores and channels is established by means of upper-con- vected Maxwell constitutive equations, the solutions are seeked and solved by the numerical method for the flow field, and then the stress distribution of the residual oil on the oil film is obtained for the displacing solution action, the relations of characterizing displaced effects between the viscoelasticity and pressure gradient of the polymer solution and the horizontal flooding force are analyzed, finally the EOR mechanism of alternating injected polymer slug is also figured out.

关 键 词：聚合物 黏弹性 残余油 提高采收率 enhanced oil RECOVERY (EOR) 

分 类 号：TE357[石油与天然气工程—油气田开发工程]