本发明公开了一种基于吲哚嗪衍生物的复合酸化缓蚀剂化合物及其制备方法。复合酸化缓蚀剂的原料和质量分数为：吲哚啉衍生物浓缩母液25% ~ 35%，复合增效添加剂30% ~ 40%，表面活性剂8% ~ 12%，助溶剂20% ~ 25%，以水为平衡。在发现吲哚嗪衍生物与多聚甲醛具有独特协同作用的基础上，以吲哚嗪衍生物为主要药剂与增效剂多聚甲醛复配；制备吲哚嘧啶衍生物浓缩母液的策略是保留合成溶剂的一部分，以提高溶解度和分散性。本发明获得的复合酸化缓蚀剂化合物所需用量低于行业标准，在相同评价温度下，其缓蚀性能优于行业标准。

The invention discloses a composite acidizing corrosion inhibitor compound based on an indolizine derivative and its preparation method. Raw materials and mass fraction of the composite acidizing corrosion inhibitor compound are as following: indolizine derivative concentrated mother liquor 25%-35%, compound synergistic additives 30%-40%, and surfactant 8%-12%, and cosolvent 20%-25%, and water for balance. On the basis of discovering the unique synergistic effect between the indolizine derivative and paraformaldehyde, the indolizine derivative is used as the main agent to compound with synergist paraformaldehyde; the strategy of preparing indolizine derivative concentrated mother liquor is remain part of the synthesizing solvent, which can enhance solubility dispersibility. The required dosage of the composite acidizing corrosion inhibitor compound obtained in this invention is lower than that of industry standard, and its corrosion inhibition performance is better than that of the industry standard under the same evaluation temperature.