陕北地区特低渗油田周期注水技术应用探讨

Discussion on the application of cyclic water injection technology in ultra-low permeability oil field in Northern Shanxi

特低渗油田注水开发过程中,注水井多为经压裂改造的油井转注而来,极易形成复杂注入系统,导致油井含水上升较快,开发效果变差。为有效缓解注采矛盾,提高注水开发效果,本文对周期注水机理进行了讨论并通过岩心驱替实验进行验证。

In the process of water injection development in the ultra-low permeability oil field,the injection wells are mostly transferred to wells modified by fracturing,which can easily form complex injection systems,resulting in rapid rise in water content of oil wells and poor development effect.In order to effectively alleviate the contradiction between injection and production,and improve the effect of waterflooding,in this paper,the mechanism of periodic water injection is discussed and verified by core displacement experiment.