一种可改变相渗特性的压裂液在低渗透油田控水挖潜的可行性探讨

Phase permeability improver in fracturing well application

随着葡I油田注水开发的不断深入,对高含水储层进行压裂增产措施并有效控制水的产出,一直是个难题。生产井中产出大量水,通常会导致产量的迅速下降,大量的水处理还会带来生产成本的增加。另外还会引起其他一些问题,如出砂、腐蚀和结垢等。其结果使生产井因无经济开采价值而被迫提前关井停产,本文结合葡I油田的储层特性,通过对改变相渗特性压裂液组分、其添加剂与该体系成胶性能、膨胀性能、粘度稳定性能、耐冲刷性能、岩心相渗试验等方面研究,分析了该种压裂液在葡I油田应用的可行性,改变相渗特性压裂液可以从根本上降低水相渗透率、增加油相渗透率,改善高含水储层的压裂后大量出水等难题,并起到很好的控水增油效果,对大庆外围油田高含水期的控水挖潜具有很好的指导意义。

In Putaohua reservoir fracturing wells containing high difficulty,invalid water injection cycle phenomenon is serious,aggravate the contradiction between layers and layers,studies the effect of permeation property of fracturing fluid system technologies.Through the laboratory evaluation and field application,effectively improved the high water-cut oil wells fracturing problem,improve after fracturing of oil reservoir producing degree,explored a new way for treatment of high water content.