孤东油田聚合物驱采出污水处理剂研究

聚合物驱采出污水由于残余聚合物的影响,处理难度很大。通过室内热化学沉降实验,优选出了高效复配型絮凝剂,评价了不同聚合物降解剂降低HPAM溶液黏度性能,确定了聚合物驱采出污水处理剂的优化配方为:100 mg/L聚合氯化铝铁+100 mg/L改性聚合氯化铝+6 mg/L对苯二酚+8 mg/L过硫酸钾+6 mg/L亚硫酸铁。经过该处理剂处理后,孤东油田聚合物驱采出污水的含油量下降97.26%,透光率从28.6%上升至90.5%,水相黏度从1.8 mPa.s降至1.0 mPa.s,达到了油田回注标准。

Study on Treatment Agent of Polymer Flooding Produced Water in Gudong Oilfield

Polymer flooding produced water is hard to deal with because of the effect of the residual polymer(HPAM).A kind of efficient and compound flocculent was optimized and the degradation performance of different polymer degradation agent system was evaluated,the optimal concentration and ratio between flocculants and polymer degradation agent were determined through thermo-chemical sedimentation experiment.As a result,the optimal formulation of the treatment agent was obtained as follows: 100 mg/L poly aluminum ferric chloride +100 mg/L modified poly aluminium chloride +6 mg/L hydroquinone +8 mg/L K2S2O8+6 mg/L FeSO4.After treated,the oil content of the water of polymer flooding water decreased by 97.26%,the light transmission rate increased from 28.26% to 90.5%,and the viscosity of the water phase decreased from 1.8 mPa · s to 1.0 mPa · s,which reached the reinjection standard of oilfield.