为解决合水油田庄六注注水管线严重腐蚀这一问题，通过对注水水质、挂片腐蚀形貌以及腐蚀产物组成、含量进行检测分析,查找原因，在此研究基础上开发了一种新型复配缓蚀剂，通过单因素试验和多指标正交试验设计对缓蚀剂MIQS、阻垢剂PAAS和杀菌剂MIT含量进行了优化。结果表明，溶解氧、侵蚀性CO2、Cl-过量引起的吸氧腐蚀、酸性腐蚀和点蚀是导致注水管线腐蚀的主要原因，Ca2+、细菌含量超标造成的结垢腐蚀和细菌腐蚀对其亦有一定影响;该复配缓蚀剂最佳配比为: 115 mg/L MIQS，30 mg/L PAAS，55 mg/L MIT，此条件下挂片缓蚀效果良好，腐蚀缓蚀率和点蚀缓蚀率高达99.57%和98.40%。

For solving the serious corrosion of water injection pipelines of Zhuangliuzhu in Heshui oilfield,the water quality,micro-morphology of steel sheet specimens,composition of corrosion products were tested and analyzed to find out the corrosion reasons. A new complex corrosion inhibitor was developed on the basis of above research. Single factor experiments and multi-target orthogonal design were employed to optimize inhibitor MIQS,scale inhibitor PAAS and bactericide MIT contents. The experimental results demonstrated that some corrosion including oxygen absorption corrosion,acid corrosion and pitting induced by excessive dissolved oxygen,erosive carbon dioxide and chloride ion were the main causes of pipelines corrosion. The fouling corrosion and bacterial corrosion resulted from exceeding standard of calcium ion and bacteria were also related to the damage of water injection pipelines. The optimal ratio were determined as follows: 115 mg/L MIQS，30 mg/L PAAS，55 mg/L MIT. Under the condition of above parameters,steel sheet specimens exhibited good anti-corrosion performance and the inhibition efficiency of general corrosion and pitting corrosion achieved 99.57% and 98.40%,respectively.