含聚污水深度过滤过程模拟及技术界限优化

Simulation of Deep Filtration Process for Wastewater Containing Polymers and Optimization of Technical Boundaries

王志华 李杰训 周楠 柏晔 许云飞

WANGZhihua LIJiexun ZHOUNan BAIYe XUYunfei

"提高油气采收率"教育部重点实验室·东北石油大学, 黑龙江 大庆 163318 中国石油大庆油田博士后科研工作站, 黑龙江 大庆 163458

Key Laboratory for Enhanced Oil & Gas Recovery of the Ministry of Education, Northeast Petroleum University, Daqing, Heilongjiang 163318, China Post-Doctoral Research Station of Daqing Oilfield, Daqing, Heilongjiang 163458, China

针对油田清水资源宝贵、深度处理后的污水水源不足背景下地面系统注采水量失衡的问题，开展了含聚污水在普通处理后进行“双层级配滤料+三层级配滤料”两级过滤的深度处理技术研究，考虑水质含聚浓度的变化及其与过滤工艺参数的关联性，利用数值模拟方法描述了深度过滤流场中油珠及悬浮物粒子的聚集分布特征，确定了深度过滤出水水质中含油与悬浮物含量的变化。结果表明，对含聚污水进行深度过滤而实现油含量、悬浮物含量均控制在5.00 mg/L以内的水质指标是可行的，优化建立的含聚污水深度过滤技术界限关系图版可为提升含聚污水处理指标和效率、保障含聚污水处理工艺运行的负荷与平稳性提供有益指导。

This study addresses the problem of unbalanced water injection and production in a ground system. Based on the existence of insufficient wastewater sources following deep filtration treatments and lack of precious clean water sources in oilfields, this study considers the technology of a two-stage deep filtration treatment that utilizes "double-layered filter material+ three-level graded filter material" after ordinary treatment of polymer-containing wastewater. The advanced treatment technology of two-stage filtration considers variations in polymer concentration and its correlation with filtration process parameters. A numerical simulation is conducted to describe the aggregated distribution characteristics of oil beads and suspended particles in the flow field of the deep filtration process. This is necessary to determine changes in the content of oil and suspended solids in filtered water following deep filtration. The results show that it is feasible to control the water quality indices of oil and the content of suspended solids to within 5.00 mg/L by performing deep filtration on the polymer-containing wastewater. An optimized technical boundary relationship map of the deep filtration technology for polymer-containing wastewater can be used to enhance the indicators and efficiency of its treatment. The operational load and stability of the polymer-containing wastewater treatment process can also be ensured.

10.11885/j.issn.1674-5086.2018.06.30.01