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陕北油田位于鄂尔多斯盆地大地构造带,以侏罗系延安组和三叠系延安组为主力油藏,具有低压、低渗透(或特低渗透)、低孔隙的特点,致使大部分残余油滞留在储层中无法驱采,导致采收率很低,。超低界面张力体系,可以降低试验井组受益井的含水上升速度,进一步提高注水效率,改善区块注水开发效果,提高油层吸水能力,改善吸水状况,扩大注入水波及体积,改善注入水的驱替效率,提高洗油效率,使井组含水下降,提高单井产油量,进一步提高原油采收率。
The Northern Shaanxi Oilfield is located in the tectonic belt of the Ordos Basin. It is characterized by low pressure, low permeability (or ultra-low permeability) and low porosity with the Jurassic Yan’an Formation and the Triassic Yan’an Formation as the main reservoirs. As a result, most of the residual oil remains No recovery can occur in the reservoir, resulting in very low oil recovery. The ultra-low interfacial tension system can reduce the water-bearing rising speed of the beneficiary wells in the pilot well group, further improve the water injection efficiency, improve the water injection development effect of the block, increase the water absorption capacity of the oil layer, improve the water absorption, expand the water inflow and volume, For efficiency, improve wash oil efficiency, make the well group water drop, improve single-well oil production, further improve oil recovery.