应用存水率与水驱指数评价油田水驱开发效果

Evaluation of Water Flooding Development Effect by Using Water Storage Rate and Water Flooding Index

对于低渗透油藏,边底水不活跃,天然能量不能得到及时的补充,因此开发难度较大。注水开发能够及时补充地层压力,是目前针对低渗透油藏的主要开发技术。而注水开发油田开发效果的评价对于进一步改善开发效果,提高最终采收率尤为重要。给出了两种评价指标,存水率以及水驱指数的理论计算公式,并分别分析其与含水率的变化关系,指出理论值与实际值产生差异的原因。以X油田为例,应用两种指标进行开发效果分析。

Because the edge water is not active and natural energy field is not sufficient, it is quite difficult to develop the low permeability reservoir. The formation pressure can be supplied through water flooding which is the core development technology for low permeability reservoir. However, the evaluation of water flooding development effect plays a vital role to further improve the development effect and enhance the final recovery. In this article, the theoretical calculation formula of two indicators including water storage rate and water flooding index were listed out, their relationship to water cut were analyzed respectively, and the reason to cause the difference between theoretical value and actual value was pointed out. Finally, these two indicators were used to evaluate the water flooding effect with X oilfield.