聚表剂驱采出水水质特性及处理技术研究

以聚表剂驱采出水为研究对象,开展了水质特性分析及现场水处理试验研究。研究结果表明:采出水中聚表剂质量浓度在312~656 mg/L之间,粘度在1.2~2.4 m Pa·s之间,Zeta电位在-27.0~-22.0 m V之间,粒径小于或等于10.0μm的油珠占35%以上;其油水分离难于聚驱采出水,静置沉降16 h后,水中油的质量浓度降至100 mg/L以下。传统的连续流两级沉降除油工艺累计运行24 h,出水中油的平均质量浓度为107.9 mg/L;序批流沉降除油工艺能够实现累计运行22 h内出水油的质量浓度在96 mg/L以下,处理效果优于传统的连续流两级沉降工艺。

Quality characteristics and treatment technology of polymer surfactant flooding produced water

Taking polymer surfactant flooding produced water as the research object, the water quality characteristics were analyzed with the field test of its treatment studied at the same time. The results of the study showed that, the mass concentration of the polymer surfactant in flooding produced water was 312 - 656 mg/L, the viscosity was 1.2 - 2.4 mPa·s, the Zeta potential was -27.0 - -22.0 mV, the oil droplets with partical size smaller than or equal to 10.0μm was accounted for more than 35%. The oil-water separation of it was more dif-ficult than that of the polymer flooding. After a 16-h static sedimentation, the mass concentration of oil in the water was decreased to below 100 mg/L. When the accumulative operation time of traditional continuous flow two-stage sedimentation oil removal process was 24 h, the average mass concentration of oil in effluent water was 107.9 mg/L. Batch flow sedimentation oil removal process could realize the effluent water oil mass concentration lower than 96 mg/L in 22 h, which showed a better treatment effect.