聚合物微球驱对低渗透双高油藏水驱效果研究

Study on water drive effect of polymer microsphere drive in low permeability double-high reservoir

鄂尔多斯盆地S39区属于典型低渗透油藏,经过20年开发,已进入高含水率、高采出程度开发期,针对剩余油分布复杂,稳产难度不断加大,利用聚合物微球驱技术开展矿场实践。结果表明,经聚合物微球驱后,油藏水驱效果得到改善,自然递减和含水率上升率均有下降,提高了波及效率,改善了油藏开发效果,对同类油藏开发具有借鉴意义。

S39 area of Ordos Basin is a typical low permeability reservoir.After 20 years of water drive development,it has entered the development period of high moisture content and high recovery degree.In view of the complex distribution of remaining oil in this area and the increasing difficulty of stable production,field practice was carried out by using polymer microsphere drive technology.The results show that the reservoir water drive effect is improved after the polymer microsphere drive,and the natural decline and moisture content rise rate are reduced,which improves the sweep efficiency and reservoir development effect,and has a reference significance for the development of similar reservoirs.