为提高油田采出水水质，采用低耗能高通量的新型超润湿纳米纤维复合膜组件对华北油田采出水进行深度处理试验研究。分析确定了膜污染清洗工艺及清洗周期，同时考察了系统对含油量及悬浮物的去除效果。结果表明，油水分离系统出水含油量及悬浮物含量均达到SY/T 5329-2012低渗透油田回注水标准；以20 min为在线反冲洗周期，分别采用质量分数0.5%的盐酸和表面活性剂对膜片进行化学清洗，清洗周期为100 h，能够有效减小膜污染恢复膜通量，保持系统稳定出水。

In order to improve the quality of oilfield produced water,a new type of ultra-wetting nanofiber composite membrane assembly with low energy consumption and high flux is used in the experimental study on deep treatment of the produced water in Huabei Oilfield.The cleaning method and cleaning period for fouled membrane are confirmed through analysis,and the removal effect of the system to oil content and suspended matters are investigated.The results show that the contents of oil and suspended matters in effluent from the oil-water separation system can meet SY/T 5329-2012 standard for low permeability oilfield backwater injection.The online backwashing cycle is determined as 20 min,and the fouled membrane is chemically cleaned with 0.5% hydrochloric acid and 0.5% surfactant,respectively.The cleaning cycle for fouled membrane is 100 h,which can effectively reduce the membrane fouling and restore the membrane flux,keeping the system to send up water stably.

赵明杰(1990-),男,硕士,工程师,研究方向为水污染控制工程