油井反向调驱(堵水)技术在低渗油田中的应用

Application of Reverse Flooding(Water Plugging)Technology of Oil Well in Low Permeability Oilfield

为提高因天然裂缝或压裂裂缝造成注入水沿裂缝方向指进导致油井含水上升的水淹油井的采收率,采用适合高渗油层和裂缝性低渗油藏封堵大孔道的反向调驱(堵水)技术,对高含水油井进行反向调驱(堵水),在靖边采油厂实施矿场试验井4口,单井平均含水率从95.6%降至53.65%,单井平均日产油从0.115 t上升至1.32 t,累计增油2870.9 t,投入产出比为1∶3.1,达到增油降水的目的,对提高水淹井的利用率和油田的产能具有重要意义。

In order to improve the recovery of water flooded oil wells in which the injected water is pointed along the fracture direction caused by natural fractures or fracturing fractures,the reverse flooding(water plugging)technology suitable for plugging large pores in high permeability reservoirs and fractured low permeability reservoirs is adopted.Reverse flooding(water plugging)is carried out in high water cut oil wells,and four field test wells are carried out in Jingbian oil production plant,and the average water cut of single well is reduced from 95.6%to 53.65%.The average daily oil production of a single well increases from 0.115 t to 1.32 t,with a cumulative oil increase of 2870.9 t and an input-output ratio of 1∶3.1,achieving the purpose of increasing oil and reducing water.It is of great significance to improve the utilization rate of watered-out wells and the productivity of oil fields.