聚合物微球渗流实验研究  

Experimental Study on Seepage of Polymer Microspheres

作　　者：王齐禄 陈晓宇[1] 王尤富[1] 王翔[1] 

机构地区：[1]长江大学石油工程学院,湖北武汉430100

出　　处：《当代化工》2016年第8期1744-1747,共4页Contemporary Chemical Industry

摘　　要：实验通过用微管中的渗流模型方法,替代传统的填砂模型方法,研究聚合物微球在不同压差情况下在不同直径微管中的流动情况。实验表明:流量与压力梯度存在着正比例关系,如果压力梯度增加,流量也会跟着增大;驱替压力设置成0.6 MPa,温度相等时,流体速度会随着溶液浓度的增加而越来越慢;纯水在5?m和10?m直径的微管里流动的时候,存在启动压力梯度,加入一点聚合物就能很好地消除;通过实验和理论研究表明:使用Kozeny-Carman模型来计算多孔介质的渗透率是可行的;品质好的聚合物微球应该在多孔介质中表现出一定的流动性,进入大孔道后与地层相互作用,最终堵塞大孔道。因此从渗流特征上,好的聚合物微球应该有以下三个标准:微球进入水中以后,其稳定性和分散性都要求表现良好;溶液在5微米及以上微管中具有良好的流动性,不宜堵塞;微球聚合短时间内膨胀(或者变性),起到在大孔道中的封堵效果。In the experiment, traditional method of filling sand model was replaced by micro tube percolation model method to study the flow of polymer microspheres in the microtubules with different diameters under different pressure conditions. The experimental results show that, there is positive proportional relation between the flow rate and pressure gradient, that is, the greater the pressure gradient, the higher the flow rate; under 0.6 MPa displacement pressure and the same temperature, the higher the concentration of polymer solution, the slower the flow rate. When water flows in 5 ？m and 10 ？m micro tubes, there is starting pressure gradient. Adding a small amount of polymer can effectively eliminate water starting pressure in the porous medium. The experimental and theoretical studies show that： Kozeny-Carman model is suitable to describe the permeability of the porous medium. Good quality polymer microspheres should have some mobility in the porous medium, after entering the large pore, based on interaction with the formation, they can ultimately block big pores. From the flow characteristics, good polymeric microspheres should have following three criteria： the dispersion and stability of polymer microspheres in water are good; the solution has a good flowability in the 5 micron and above micro tubes; in a short period of time, the microspheres can swell to block big pores.

关 键 词：聚合物微球 渗流 微管 非均质 

分 类 号：TE357[石油与天然气工程—油气田开发工程]