低伤害有机土酸体系的研制及应用

Development and application of low damage organic mud acid system.

为解决滨南油田部分注水井欠注严重的问题 ,研制了一种新型低伤害有机土酸液体系LDA - 2。该体系避免了HF反应中氟化铝沉淀造成的伤害 ,能解除地层深部堵塞 ,提高酸化现场施工的有效性。使用LDA - 2酸液体系酸化施工后 ,滨南油田低渗透注水井的吸水量大幅度上升。滨A井的现场施工实时监测表明 ,该井的表皮系数由酸化处理前的 13降到 - 0 .2 1。

A new type of low damage organic mud acid system LDA?2 is developed to solve the problem of serious underinjection of partial water injectors in Binnan oilfield. The use of this system avoids the damage made by AlF 3 precipitation in HF reaction, which can remove plugging in deep formations and improve effectiveness of field acidizing operation. After LDA?2 system is used for acidizing operation, water?intake capacity of low?permeability water injector in Binnan oilfield increased by a wide margin. Real?time monitoring to field operation of Bin A well shows that the skin factor of this well reduced from 13 before acidizing treatment to -0.21, and the effect of acidizing stimulation is obvious.