摘要
黏弹性是影响聚合物驱油效率的重要因素。在聚合物常规理化性能检测标准中,没有关于聚合物黏弹性的检测指标。采用CaBER毛细管拉伸断裂流变仪测试聚合物溶液流体丝直径随时间变化曲线,用Exponential模型对曲线进行拟合,拟合的松弛时间可以作为评价聚合物溶液黏弹性大小的技术指标。对水解聚丙烯酰胺、疏水缔合聚合物和高分子表面活性剂的实验研究证明,该评价方法具有样品用量少、操作简便、检测数据重复性高的优点。此外,对采用该方法所适用的聚合物溶液体系及实验条件进行了研究。结果表明:采用聚合物溶液浓度为500mg/L比较合适,在测试前需要对其进行过滤;实验温度应控制在45℃。
Viscoelasticity is an important factor influencing the oil displacement efficiency of polymer. In the conventional physical and chemical property testing standards, there are not the testing indexes for the viscoelasticity of polymer. For this reason, the diameter of polymer solution stream is measured using CaBER capillary tension fracture rheometer, and the relationship curve between the diameter and time is obtained. The curve is fitted using exponential model, and the relaxation time obtained by fitting is used as the technical index for evaluating the viscoelasticity of polymer solution. The experiments to hydrolyzed polyacrylamide solution, hydrophobic associating polymer solution and high molecular surfaetant solution show that the polymer ,viscoelasticity evaluation method has the advantages of less sample dosage, simple operation and high data repeatability. In addition, the studies on the polymer solution systems and the experimental conditions suitable to the method show that, the optimal polymer solution concentration is 500 mg/ L, the optimal experimental temperature is 45℃, and the experimental polymer solution should be filtered.
出处
《石油工业技术监督》
2014年第3期52-55,共4页
Technology Supervision in Petroleum Industry
