多氢酸酸化技术在川西须家河低渗致密砂岩储层中的应用

Application of Multi-Hydrogen Acid in Xujiahe Low-Permeability Tight Sandstone Reservoir in Western Sichuan

多氢酸具有缓速、深穿透、防垢、极强的吸附能力和水湿的性质,能催化HF与石英的反应,是适合砂岩油藏的解堵技术。通过对川西须家河储层地质特征、伤害因素分析,详细阐述了多氢酸酸化解堵技术的机理、特点,结合川西须家河储层地质特征,采用多氢酸体系,优化配方体系和施工方案,在新场气田A井现场成功应用。

Multi -hydrogen acid,with its properties of acidizing retardance,deep penetration,scale prevention,strong adsorption capacity and water humidity,can catalyze the reaction of hydrofluoric acid and quartz,making it an ideally applicable in sandstone stimulation technique.Based on the analysis of geological features and damage factors of Xujiahe reservoir in western Sichuan,the mechanism and characteristics of multi -hydrogen acid are expounded in detail.Combined with the geological characteristics of Xujiahe reservoir in western Sichuan and the application of multi -hydrogen acid system,the optimized formulation and operation scheme were applied successfully in Xinchang gas field well A.