等黏度含聚污水配制稀释聚合物可行性研究

Feasibility of the Same Viscosity Dilute Polymer Systems Prepared with Polymer-Bearing Wastewater

为研究大庆油田聚合物驱油过程中等黏度含聚污水配制聚合物体系的可行性,通过配制等黏度的驱油体系,对体系的黏度和抗剪切性能、黏弹性、稳定性、分子线团尺寸等性能参数进行测定,在此基础上进行了注入能力和驱油效果评价。结果表明,相同黏度下聚合物性能、注入能力和驱油效果随着体系质量浓度的增加而变好;含聚污水配制稀释聚合物在大庆油田具有广泛的适用性,针对大庆油田二类油层,通过计算实验时间减少比例、采收率提升比例、聚合物用量增量得到龙虎泡清水配制,含聚430mg/L污水稀释聚合物体系(qw3体系)具有良好的驱油能力。

The feasibility of preparation of the same viscosity dilute polymer systems with polymer-bearing wastewaterwas studied in the process of polymer flooding in Daqing oilfield. The concentration of oil displacement system, the system viscosity, shear resistance, viscoelasticity, stability and molecular thread size were measured on the basis of the injection capacity and oil displacement effect assessment. The results showed that under the same viscosity polymer performance, injection capacity and oil displacement effect were increased with the increase of concentration of system. Using wastewater containing polymer in Daqing oilfield to prepare diluted polymer solution had wide applicability. In view of the Senior Reservoir of Daqing oilfield, through calculating the experimental time reduction ratio, recovery factor improvement ratio, polymer dosage incremental, dilute polymer system （qw3 system） containing poly 430 mg/L was obtained with Longhu Lake water, which can realize comprehensive benefits.