用极化电阻法和动态腐蚀模拟法测定了工业生产的和专门合成的五种缓蚀剂在钠盐水和复合盐水中的缓蚀性、抗氧性和耐温性，研究了筛选出的两种缓蚀剂（ＴＰＣ和ＴＰＡ）的极化曲线，考察了它们在复合盐水泥浆中缓蚀性的浓度依赖关系，在此基础上研制出缓蚀剂ＤＦＰ：配入除氧组分的１∶２的ＴＰＣ＋ＴＰＡ。此剂在室内评价中缓蚀率达８４％，两口井多井段现场检测中缓蚀率在８０％以上，与饱和复合盐水钻井液的配伍性良好。 The polarization corrosion resistance and dynamic corrosion simulation were used to determine the corrosion inhibition, oxidation resistance and temperature resistance of the five kinds of corrosion inhibitors synthesized in industry and specially synthesized in sodium salt water and composite brine. The polarization curves of corrosion inhibitors (TPC and TPA) were used to investigate their concentration dependence of corrosion inhibition in composite salt water slurry. On this basis, a corrosion inhibitor, DFP, 2 TPC + TPA. The corrosion inhibition rate of this agent was 84% ​​in the indoor evaluation. The corrosion inhibition rate in the multi-well section of the two wells was more than 80%, which was in good compatibility with the saturated composite brine drilling fluid.