超低渗透油藏微纳米胶囊驱油技术研究与应用

Research and application of micro nano capsules flooding technology in ultra-low permeability reservoirs

针对姬塬油田超低渗透C4+5油藏水驱矛盾突出、水驱状况变差、剩余油动用难度大等问题,通过两轮次微球调驱后效果逐渐变差,控水稳油难保障,因此开展活性微纳米胶囊驱油技术试验。按照先堵后驱的思路,研发了活性微纳米胶囊药剂,开展了室内评价和4个井组现场应用,取得了较好的驱油及降递减效果,有效的缓解了油藏水驱矛盾,实现区块剩余油的有效开采。

In view of the problems such as prominent water flooding contradiction,poor water flooding condition and difficult utilization of remaining oil in ultra-low permeability C4+5 reservoir of Jiyuan oilfield,after two rounds of polymer microsphere regulation,the effect gradually becomes worse,and it is difficult to ensure water control and oil stability.Therefore,active micro nano capsules oil flooding technology test was carried out.According to the idea of blocking before driving.Active micronanocapsules were developed.Indoor evaluation and field application of 4 well groups were carried out.It has achieved good oil displacement and decline effect,effectively alleviates the contradiction of reservoir water displacement,and realizes effective exploitation of remaining oil in the block.