酮醛胺缩合物高温缓蚀剂制备方法的优化*

Optimization of Preparation Method for Ketoaldehyde Amine Condensate High Temperature Corrosion Inhibitor

蒋建方 冯章语 宋清新 刘秋均 初振钰 何 琛 金 玲

JIANG Jianfang FENG Zhangyu SONG Qingxin LIU Qiujun CHU Zhenyu HE Chen JIN Ling

为提高酸化缓蚀剂在高温深井中的应用效果，对酮、醛、胺一次性按比例混合后催化合成缓蚀剂的工艺进 行了优化，在盐酸（20% HCl）、土酸（12% HCl+3% HF）和 16 MPa 的条件下，分别在 160℃、4.0%加量和 180℃、 4.5%加量下测定酮醛胺缩合物高温酸化缓蚀剂中试产品对N80油管试片腐蚀速率的影响。结果表明，优化后的 制备过程分为四步：在盐酸的催化下，甲醛和苯乙酮反应生成酮醛缩合物；分离产出水，完成除水；酮醛缩合物与 苯胺反应生成酮醛胺缩合物；将该缩合物与缓蚀增效剂（辛炔醇）、高温增效剂（氯化亚铜）、有机溶剂（无水乙醇） 混合均匀，制得酮醛胺缩合物高温酸化缓蚀剂成品。与原制备工艺相比，四步法所得中试产品的产率和性能均 提高。优化工艺制备的中试产品符合石油天然气行业标准SY/T 5405—1996中缓蚀剂的一级评价指标，满足深 井、超深井油气藏酸化性能要求。图2表2参18

The process of catalytic synthesis of corrosion inhibitor by mixing ketone，aldehyde and amine in proportion at one time was optimized to improve the effect of corrosion inhibitor in deep well with high temperature. Under the conditions of 16 MPa， 160°C，4.0% addition and 180°C，4.5% addition in hydrochloric acid（20% HCl）and earth acid（12% HCl + 3% HF）respectively， the effect of ketoaldehyde amine condensate corrosion inhibitor produced in pilot test on the corrosion rate of N80 test piece was evaluated. The results showed that the modified preparation process was divided into four steps. First，ketoaldehyde condensate was obtained by the reaction between acetophenone and formaldehyde with hydrochloric acid as catalyst. Second，water removal was achieved by separating the produced water. Third，ketoaldehyde amine condensate was obtained by reacting ketoaldehyde condensate with aniline. Finally，ketoaldehyde amine condensate corrosion inhibitor product was prepared by mixing ketoaldehyde amine condensate，corrosion inhibitor synergist（octanol），high temperature synergist（cuprous chloride）and organic solvent （anhydrous ethanol）. Compared with the original one，the improved process had a higher production rate and better product performance. The pilot test product prepared by modified technology reached the first class product corresponding to the oil and gas industry standard SY/T 5405—1996 and met the acidification requirement of oil-gas reservoir in deep well and ultra-deep well.

10.19346/j.cnki.1000-4092.2020.02.025