特低渗油藏注水技术探讨

桩西采油厂所开发的特低渗油藏,由于储层渗透率低、孔隙度小等原因,导致油水渗流阻力增大,注采井间难以形成有效驱动,从而造成特低渗油藏采收率过低,严重影响特低渗油藏的开发效果。因此为提高桩西采油厂特低渗油藏开发效果和采收率,通过室内试验研究注采井井间压力分布及启动压力、注入压力与注入量的关系等,从而改善特低渗油藏的开发效果,提高特低渗油藏的采收率。现场应用6口井,日增注达到了142m3,对应油井累计增油5436t。

Investigate of Injection Technology of Ultra-low permeability reservoir water technology

Zhuangxi oil plant developed ultra-low permeability reservoir,because of low reservoir permeability,small porosity and so on,it is easy to increase resistance of water flow,and it is difficult to form an effective drive between the injection wells,in the end it results in the recovery of ultra-low permeability reservoir is too low,seriously impact on the development effect of ultra-low permeability reservoir.Therefore,to enhance the ultra-low permeability reservoir development effect and recovery of Zhuangxi plant,through laboratory testing of injector wells` pressure distribution,starting pressure,injection pressure and injection rate of the relationship,so as to improve development and recovery of the ultra-low permeability reservoir.The technique is applied in 6 wells,and it get the effect that the injection increasingly reached 142m 3,the increase oil of corresponding well cumulates 5436 t.