针对濮城低渗透油井酸化后效果差、含水上升快这一实际情况 ,研究了乳化酸酸化工艺技术。乳化酸酸化酸液由前置液、乳化酸、后置液、KFT反应液和顶替液组成。该酸具有选择性、防腐性、抗水敏性和缓速特点 ,适用于油井酸化。文中对乳化酸酸化原理、配方、性能试验和返排工艺进行介绍 ,通过在濮城油田 8口井应用 ,取得了较好的效果。 Aiming at the fact that Pucheng low-permeability oil well is poorly acidified and its water-cut rate increases rapidly, the technology of emulsifying acidification has been studied. Emulsified acid acid solution from the pre-liquid, emulsifying acid, after the liquid, KFT reaction solution and displacing liquid composition. The acid has selectivity, corrosion resistance, anti-water sensitivity and retarding characteristics, suitable for oil well acidification. In this paper, the principles of emulsifying acidification, formulation, performance test and return process are introduced, and achieved good results through the application of 8 wells in Pucheng Oilfield.