姬塬油田长9底水油藏多元复合黏弹酸深部酸化技术研究

Research of polyelement composite viscoelastic acid fluid deep acidizing technology in Jiyuan Chang 9 bottom water reservoirs

姬塬长9油藏油水关系复杂,常规水力压裂或高能气体压裂工艺出现了不适应的情况。在储层综合研究的基础上,研发了一种多元复合黏弹酸酸液体系。在室内优化酸液配方评价基础上,通过施工参数和施工工艺优化,开展深部酸化现场实验5口井。实验表明,黏弹酸深部酸化技术在底水油藏具有控水增油的措施效果,为同类油藏的改造提供了一定的借鉴意义。

The conventional hydraulic fracturing is not applicable to the reservoir treatment because the relationship between the water and oil formation is complex in Jiyuan Chang 9reservoir oilfield. A viscoelastic acid compound system is researched and manufactured on the basis of the formation features in order to enhance the recovery of production. Acid fluid system was evaluated in lab and tested in oil well with optimization of construction scheme,effect of deeper acid is better than that of hydraulic fracturing and conventional acid, the test results show that deeper acidizing technology has a good effect in the bottom water reservoir and also provide a good reference for similar reservoir production.