低渗透油田注入水配伍性实验方法研究

对于注水开发油田,特别是对低孔、低渗及非均质性较强的低渗透油田来说,一旦与储层及储层流体不配伍的水注入到储层后,将直接影响注水井的吸水能力,导致严重的储层伤害,因此研究注入水与储层岩石及流体的配伍性是低渗透油田"注好水"的重要前提。分别从注入水自身稳定性、注入水与地层水配伍性以及注入水与储层配伍性三方面着手,总结对比了研究低渗透油田注入水与地层水及储层配伍性的室内实验方法,并对低渗透油田注水开发中遇到的注入水配伍性问题提出了相应的建议。

Study on the experimental methods of injecting water compatibility for low permeability reservoir

For waterflooding reservoir, especially for the low permeability reservoir with low porosity, low permeability and strong heterogeneity. The water absorbing capacity of reservoir will greatly decrease once the injecting water is not compatible with the formation and formation fluids which will cause formation damage directly. In order to inject water properly for the low permeability reservoir, it's important to study the compatibility of injecting water with the reservoir rocks and fluids. The experimental methods are summarized from three aspects in this paper: the stability of the injecting water itself, the compatibility of injecting water and formation water and the compatibility of injecting water and the formation. Then suggestions are made to solve the problems which will be encountered during the injecting process for low permeability reservoir.