摘要
文章分析了聚合物溶液性质、配制水源水质和机械剪切对聚合物溶液黏度的影响。分别用辽河油田欢三联软化清水和软化污水配制聚合物母液,用水驱污水和二元驱污水配制目的液,并测定目的液黏度;在相同搅拌时间下,测定不同转速对母液黏度的影响。结果表明:"软化清水+水驱污水"配制的目的液黏度最大,"软化污水+二元驱污水"配制的目的液黏度最小,且在目的液中增加表面活性剂,对目的液黏度基本无影响;搅拌时间相同时,转速越小母液黏度越大。提出控制聚合物黏度的主要方法,一是筛选出适合油藏特性的聚合物类型,并通过改变聚合物分子结构增强其抗剪切和抗盐性能;二是选择合理的化学驱污水处理工艺,降低不利因素对配制液黏度的影响;三是优化从配制、注入到运行操作的全过程工艺方案,保证聚合物的充分熟化及聚合物溶液的流态稳定、改变双螺带搅拌器的运行方式和内部结构可以提高母液的熟化效率。
The effects of the properties of polymer solution, water quality and mechanical shear on the viscosity of polymer solution were analyzed. In this paper, polymer mother liquor was prepared by using Huansanlian softening water and softening wastewater from Liaohe Oilfield, and target liquor was prepared by water flooding wastewater and binary flooding wastewater, and viscosity of target liquor was measured. Under the same stirring time, the influence of different speed on the viscosity of mother liquor was measured. The results showed that "softened water + water flooding wastewater" had the highest viscosity of the target solution, and "softened wastewater + binary flooding wastewater" had the lowest viscosity of the target solution, and adding surfactant in the target solution had little effect on the viscosity of the target solution. At the same stirring time, the smaller the speed, the greater the viscosity of mother liquid. The main methods to control polymer viscosity were proposed. One was to select the polymer type suitable for reservoir characteristics and enhance its shear resistance and salt resistance by changing polymer molecular structure. The second was to choose a reasonable chemical flooding wastewater treatment process to reduce the influence of adverse factors on the viscosity of the preparation solution. The third was to optimize the whole process plan from preparation, injection to operation to ensure full curing of polymer and stable flow state of polymer solution. Changing the operation mode and internal structure of twin screw stirrer could improve the curing efficiency of mother liquor.
作者
董林林
Dong Linlin(CNPC Liaohe Engineering Co.,Ltd.)
出处
《油气田环境保护》
CAS
2021年第6期28-32,共5页
Environmental Protection of Oil & Gas Fields
关键词
聚合物溶液
黏度
影响因素
对策
polymer solution
viscosity
influencing factors
measure
