Single phase micro-emulsified acid was studied in laboratory aimed at reducing its corrosion on pipes in the process of acidizing and increasing the penetration range of the layer. Micro-emulsified acid were prepared by mixing cationic surfactant with nonionic surfactant and other additives. The laboratory formation of the single phase micro-emulsified mud acid were as following(mass ratio) :2. 5% A-126, 2. 5% CHJ-100, 1.2% n-butanol, 2.3% ra-octanol, 0.5% W-221, 67.0% mud acid, 24.0% diesel oil. The result shows that its thermal stability can reach 81 t! With the suitable amount of additive of anionic surfactant W-221. The reactions between the micro-emulsified acid and PI 10S steel under both room temperature and 70 X. Showed that the ratio of inhibiting corrosion has reached to 90.57% compared with mud acid of the same concentrations. Finally, the reaction between the acid and man-made rock core under 70 t shows that the corrosion rate reduce to 0. 5%.%为降低酸化过程中酸液对油管和套管的腐蚀,增加酸液对地层的穿透距离,通过阳-非离子表面活性剂复配,成功制备了单相微乳土酸体系.并得出了较优的实验室配方(质量分数):A-126 2.5％,CHJ-102.5％,正丁醇1.2％,正辛醇2.3％,W-221 0.5％,土酸67.0％,柴油24.0％.通过添加适量的阴离子表面活性剂W-221,使体系在81℃保持了良好的热稳定性.在室温和70℃下分别与P110S钢片反应,与同浓度的土酸相比,缓蚀率达到90.57％.在70℃下与人造砂岩岩芯反应,溶蚀率降低到了0.5％.
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