160℃冻胶酸用缓蚀剂的研制及室内评价
The Preparation and Laboratory Evaluation of Inhibitor for Gelled Acid at 160?C

通过对曼尼希碱类缓蚀剂作用机理及合成工艺的研究，室内合成了五种酸溶性能良好且与冻胶酸配伍的曼尼希碱类缓蚀剂，采用常压静态腐蚀试验及高温高压动态腐蚀试验优选并复配出合适的缓蚀主剂。通过对增效剂的作用及作用机理的讨论，科学地细分增效剂种类，并与缓蚀主剂进行多元复配，最终得到160℃冻胶酸用缓蚀剂——CH-160。缓蚀剂性能评价实验结果：160℃下，在20%盐酸介质中动态腐蚀速率仅为24.56 g/(m²？h)，在20%盐酸配置的冻胶酸介质中动态腐蚀速率仅为54.90 g/(m²？h)。实验结果表明研制的CH-160缓蚀剂在盐酸介质及冻胶酸介质中均有优良的缓蚀效果，可满足SY/T 5405-1996中160℃酸化缓蚀剂一级品的要求。
Based on the study of the action mechanism and Synthesis process of mannich base inhibitors, five mannich base inhibitors with good acid solubility and compatibility with gelled acid were synthesized in the laboratory, and the suitable main inhibitors were optimized and compounded by the static corrosion test under atmospheric pressure and the dynalic corrosion test under high temperature and pressure. By discussing the function and mechanism of synergists, the types of synergists were subdivided scientifically, and were compounded with the main inhibitor. Finally, CH-160 inhibitor for gelled acid at 160？C was obtained. The results showed that the dynamic corrosion rate at 160？C was only 24.56 g/(m²？h) in 20% hydrochloric acid and 54.90 g/(m²？h) in 20% hydrochloric gelled acid. The experimental results show that the developed CH-160 inhibitor for gelled acid at 160？C has excellent corrosion inhibition efficiency in 20% hydrochloric acid and gelled acid, and can meet the requirements of the first grade product of 160？C acidizing inhibitor in industry standard SY/T 5405-1996.