多孔介质剪切作用对聚合物溶液有效黏度的影响  

The Influence of Shearing of Porous Media on the Polymer Solution's Effective Viscosity

作　　者：吴志伟[1,2] 何凯 

机构地区：[1]中石油长城钻探工程有限公司,北京100101 [2]中国石油大学(北京)石油工程学院,北京102249 [3]中石油长城钻探苏里格气田项目部,辽宁盘锦124000

出　　处：《重庆科技学院学报（自然科学版）》2016年第3期43-45,共3页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：国家科技重大专项"油田开采后期提高采收率新技术"(2011ZX05009-004)

摘　　要：聚合物溶液在驱油过程中的黏性损失直接影响其波及效果,模拟研究聚合物溶液在岩心中黏度损失具有重要意义。使用特定聚合物HPAM溶液在不同尺度岩心中渗流达到稳定,采用面积积分法,建立剪切作用对黏度损失贡献率的变化规律曲线。结果表明,HPAM溶液在近井地带高速流动时,剪切作用在黏度损失中的贡献率可达到100%,而对聚合物溶液渗流前缘影响较小,前缘黏度损失主要受滞留和水稀释作用的影响。质量浓度为1.5 gL的HPAM溶液与1.8 gL的相比,剪切作用易达到稳定,对黏度损失贡献率较小。In the process of flooding,the loss of polymer solution＇ s effective viscosity had a direct impact on the sweep efficiency,so it＇s of great importance to study the viscosity loss of polymer flooding in cores. HPAM solution was used to flow through the cores of different length to achieve stability. The relationship between viscosity loss and shearing rate was established with integral method. The results showed that when HPAM solution flowed with a high shearing rate near the wellbore,the contribution of shearing to viscosity loss could reach 1. 0,while having little effect on the front of polymer solution. The viscosity of front was affected mainly by retention and water dilution.Compared with the concentration of 1. 8 gL HPAM solution,the shearing to the concentration of 1. 5 gL HPAM solution was more likely to achieve stability,and the contribution to viscosity loss was smaller.

关 键 词：黏度损失率 滞留 剪切作用 贡献率 

分 类 号：TE357[石油与天然气工程—油气田开发工程]