一种油田注水缓蚀剂的合成及性能评价

合成缓蚀剂的最佳工艺条件为：油酸与二乙烯三胺的摩尔比为1：1．2，咪唑啉中间体的合成时间8h，环化温度为220℃，中间体与季铵化试剂DMS的摩尔比为1：1。采用静态失重法，对在最佳工艺条件下合成的咪唑啉季铵盐进行缓蚀性能评价。结果表明，当咪唑啉季铵盐缓蚀剂加量为1000mg／L时，就能达到很好的缓蚀性能；并且缓蚀剂的用量为500mg／L时，24h腐蚀速率为0．019mm／a，80℃时腐蚀速度为0．0214mm／a，将咪唑啉季铵盐以500mg／L与十二烷基硫酸钠（SDS）300mg／L、碘化钾（KI）1500mg／L、十二烷基苯磺酸钠（SDBS）200mg／L复配。其缓蚀率最高可达77．16％。

Synthesis and property evaluation of the corrosion inhibitor of oilfield flooding

The optimum conditions for synthesis inhibitor：the mole ratio of oleic acid to diethylene triamine was 1：1.2 about intermediate synthetic time 8 h at the cyclizing temperature 220℃ and the mole ratio of imidazoline to quaterisation reagent was 1 ： 1 were determined. The corrosion inhibition performance of imidazoline quaternary ammonium is evaluated by static weight-loss method. The result showed that when the dosage of imidazoline quaternary ammonium was 1 000 mg/L, excellent performance of corrosion inhibition could be attained, and when the dosage of corrosion inhibitor was 500 mg/L, the corrosion rate was 0.019 mm/a at 24 h and 0.021 4 mm/a at 80℃. After the imidazoline quaternary ammonium of 500 mg/L blended with sodium dodecyl sulfate of 300 rag/L, sodium dodecyl benzene sulfonate of 200 mg/L and potassium iodide of 1 500 mg/L,the inhibiting rate had achieved 77.16%.