一种水驱油藏开发效果评价新方法在渤海油田的应用

Application of a new evaluating method for development effect of water-flooding reservoir in Bohai Oilfield

为了准确、客观评价渤海油田不同类型油藏、不同含水阶段的开发效果,分别选取不同类型油藏的典型开发单元,统计含水率与采出程度关系实际曲线,进行归一化处理,并利用万吉业水驱曲线进行定量化拟合,建立不同类型油藏含水率与采出程度关系曲线图版。引入"阶段末采出程度"参数,按照不同类型油藏、不同含水阶段分别制定评价标准,形成了一种水驱油藏开发效果评价新方法。实例应用效果表明,新方法评价结果准确可靠,能够为油田调整挖潜提供依据和方向。

In order to accurately and objectively evaluate the development effect of different types of water-flooding reservoir at various water-cut stages in Bohai Oilfield,selecting the typical development units from different types of reservoir,the curves of relationship between water cut and recovery rate were analyzed,which were normalized and quantitatively fitted by using the water drive curve proposed by Wan J Y.And then it was established the different curve charts of relationship between water cut and recovery rate.On this basis,introducing a parameter of“recovery rate at the end stage”,an evaluation criterion was determined according to the different types of reservoir and the various water-cut stages.Thus,a new evaluation method was established for the development effect of water-flooding reservoir.The case study showed that the evaluation results are accurate and reliable.