一种油田采出水用复合阻垢缓蚀剂的研究

发布时间：2018-08-29 16:48

【摘要】：目的找到一种可以应用于油田采出水处理的新型绿色阻垢缓蚀剂。方法以N80钢为研究对象,在油田采出水模拟水质中分别采用静态阻垢实验、静态挂片实验和极化曲线、电化学阻抗法对阻垢缓蚀剂的阻垢性能和缓蚀性能进行研究。结果通过正交实验确定了聚环氧琥珀酸、氨基三亚甲基磷酸和水解聚马来酸酐的比例,确定了阻垢缓蚀剂的配方,确定阻垢缓蚀剂在油田采出水中的最优加量为20 mg/L,该阻垢缓蚀剂可以应用于较高钙含量、p H值在6.0~8.0之间的油田采出水的处理,其阻垢率可以达到90%以上。通过极化曲线和电化学阻抗法得到,该阻垢缓蚀剂属于以抑制阴极为主的混合型缓蚀剂,在油田采出水中的添加量为20 mg/L时,缓蚀率可以达到82%以上,使腐蚀速率大幅降低,满足行业标准的要求。结论该复合型阻垢缓蚀剂制备简单,阻垢缓蚀性能良好。
[Abstract]:Objective to find a new green scale inhibitor for oilfield recovery water treatment. Methods using N80 steel as the research object, static scale inhibition experiment, static hanging test and polarization curve were used to study the scale inhibition performance and corrosion inhibition performance of scale and corrosion inhibitor in simulated water quality of oilfield produced water by electrochemical impedance method. Results the proportion of polyepoxysuccinic acid, amino trimethylenephosphoric acid and hydrolyzed polymaleic anhydride was determined by orthogonal experiment, and the formulation of scale and corrosion inhibitor was determined. The optimal addition of scale and corrosion inhibitor in oilfield produced water was determined to be 20 mg/L,. The scale and corrosion inhibitor could be applied to the treatment of oilfield produced water with higher calcium content (pH = 6.0 ~ 8.0), and the scale inhibition rate could reach more than 90%. By polarization curve and electrochemical impedance method, the scale and corrosion inhibitor is a kind of mixed corrosion inhibitor, which is mainly cathodic inhibitor. The corrosion inhibition rate can reach more than 82% when the addition of 20 mg/L in the produced water of oil field is used, and the corrosion rate is greatly reduced. Meet industry standards. Conclusion the compound scale and corrosion inhibitor is simple in preparation and good in scale and corrosion inhibition.
【作者单位】：西安石油大学化学化工学院;
【基金】：陕西省科技厅工业科技攻关项目(2016GY-158)~~
【分类号】：TE357.6;TG174.42

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