渤海油田注聚驱采出液预处理工艺参数优化

Optimization of Process Parameters for Pretreatment of Production and Flooding in Bohai Oilfield

探究了海上油田注聚合物驱所开采出的原油混合液预处理工艺。通过对渤海油田聚合物采出液进行絮凝、过滤和降解实验,以聚合物和悬浮物含量为考核指标,设计单因素和正交实验,优选出电源、三维电极及降解敏化剂等工艺参数。实验表明,高频电源、铝质三维电极和碳化硅敏化剂能高效处理聚合物采出液,其最佳的工艺参数组合为:预处理1 L注聚驱采出液,需要用25 Hz的高频电源,加入60 g铝质的三维电极和70 g碳化硅的微波敏化剂,降解6 min,处理聚合物效果最好,耗能最少。通过对聚合物采出液预处理工艺参数优化后,满足海上平台处理后续油水分离中水质要求,具有一定的推广应用价值。

This paper explores the pretreatment process of crude oil mixture extracted from polymer flooding in offshore oilfields.Through the experiments of flocculation,filtration and degradation on the polymer production fluid of Bohai Oilfield,single factor and orthogonal experiments are designed by taking polymer and suspended solids content as indicators.The process parameters such as power supply,three-dimensional electrode and degradation sensitizer are selected in the experiments.The results show that the high-frequency power supply,aluminum three-dimensional electrode and silicon carbide sensitizer can efficiently process the polymer production liquid.The best combination of process parameters is:pre-treatment 1L injection flooding production fluid,which needs 25 Hz high frequency power supply,is degraded for 6 min by adding 60 g of aluminum three-dimensional electrode and 70 g of silicon carbide microwave sensitizer,which shows the best effect on polymer treatment and the lowest energy consumption.Through the optimization of pretreatment process parameters of the polymer production fluid,the results meet the demand of the water quality requirements in the subsequent oil-water separation handled by offshore platform,which shows the application value and is worth popularizing.