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本文针对临盘油田在开发中后期储层发生深部堵塞,酸化有效率偏低的现象,通过室内研究,优选出高性能的缓速酸液体系:有机复合酸和低伤害酸,实验证明酸液体系具有与地层岩心反应速度慢、溶蚀率高,缓蚀性能强、与地层流体配伍性好等特点。并根据临盘油田地质特征,配套了适合的酸化工艺,大量现场应用证明,有机复合酸和低伤害酸对我厂砂岩油藏适应性强,对处于中后期开采阶段的砂岩油藏实施酸化作业,油井增油有效率高.
In this paper, according to the phenomena of deep blockage and low acidification efficiency in middle and late stage of development in Linpan Oilfield, through indoor research, the high performance retarder acid system: organic compound acid and low injury acid were selected. It has the characteristics of slow reaction with formation core, high dissolution rate, strong corrosion inhibition performance and compatibility with formation fluids. According to the geological characteristics of Linpan Oilfield, the suitable acidizing process is matched. A large number of field applications prove that organic compound acid and low-harm acid have strong adaptability to our sandstone reservoir, and acidizing operation is carried out in the sandstone reservoir in the middle and late stage of exploitation Oil wells increase oil efficiency.