超前注水在苏家屯油田开发中的应用

The Application of Advanced Water Injection in Sujiatun Oilfield

苏家屯油田是典型的低孔特低渗油田,具有地层压力下降快、稳产难、采收率低等特点。超前注水采用先注后采的开发方式,油井开采前先向地层注水充能,提高地层压力,使油井长期保持较高的地层能量及驱油压力梯度,减小地层压力下降造成的储层伤害,有效提高注水波及面积。此外,超前注水还能对指进现象进行有效预防,提高采收率。

Sujiatun Oilfield is a typical of low porosity and low permeability reservoir, with the rapid decrease of reservoir pressure, the difficult of stable production and low recovery. The advanced water injection is a method with injection first ,then exploitation, to compensate the reservoir energy and increase the reservoir pressure, thus maintaining a high reservoir energy and oil displacement pressure gradient, decrease reservoir damage caused by pressure drop, improve the swept area effectively. In addition, advanced water injection can prevent the fingering effectively, enhanced oil recovery.