聚合物微球溶液封堵性能影响因素研究  

The Influence Factors on Plugging Characteristics of the Polymer Microsphere

作　　者：朱霞[1] 姚峰[1] 钱志鸿[1] 

机构地区：[1]中国石化江苏油田分公司工程技术研究院,江苏扬州225009

出　　处：《胶体与聚合物》2014年第1期38-40,共3页Chinese Journal of Colloid & Polymer

摘　　要：采用与低渗透地层岩心孔喉尺度相近的可视化微圆管模拟聚合物纳米微球溶液在低渗透储层内的运移和封堵性能,探讨驱替外压、储层温度、质量浓度等因素对聚合物微球流动速率的影响。结果表明:驱替压力为0.6MPa时,聚合物微球溶液在10μm微管中的流速是5μm微管中流速的3~10倍,在5μm微管中存在启动压力梯度且流速和压力梯度呈线性关系,2μm管中未能观测到聚合物微球流动,在非均质微管束中聚合物微球优先选择进入直径较大的微管。在65℃~85℃范围内,温度对聚合物微球在微管的渗流趋势影响不明显,聚合物微球在微管内的流速随质量浓度增大逐渐变慢。Factors influencing the migrate characteristic of polymer microsphere YG-370-5 through individual pore throat of low permeability cores were investigated using a visual flowing micro-channels experiment model. Those factors included displacement pressure, oilfield temperature, polymer microsphere mass concentration and micro-channel diameter. The results show that the threshold pressure gradient of polymer microsphere is in the micro-channels with diameter of 5μm and the injection flow ratio is in linear relations with the threshold pressure gradient. As the polymer micro-sphere mass concentration of microsphere increased,the plugging rate increases. When the microspheres are displaced at the pressure of 0.6 Mpa, the flow rate in micro-channels with diameter of 10μm is 3~10 times larger than that of 5μm. There is no polymer micro-sphere in micro-channels with diameter of 2μm. The experiments indicate that temperature has little impact on the plugging performance between 65℃ and 85℃.

关 键 词：聚合物微球 微管 孔喉尺度 封堵 启动压力梯度 

分 类 号：TE39[石油与天然气工程—油气田开发工程]