基于典型曲线快速预测油藏开发指标——以伊拉克鲁迈拉油田Upper Shale大型多层砂岩油藏为例

A method of production profile quick prediction based on typical curves: A case study of the Upper Shale large multi-layered sandstone reservoir, Rumaila Oilfield, Iraq

结合数值模拟方法和常规油藏工程方法的优点,考虑储集层非均质性和开发方式变化的影响,提出一种基于典型曲线进行油藏开发指标快速预测的方法。选取典型区块建立精细地质模型并在此基础上开展精细数值模拟研究,得到不同类型储集层在不同开发方式下的开采典型曲线,进一步结合小层平面划分结果、地质储量评价结果、单井产出及注入能力评价结果进行全油藏开发指标预测。以伊拉克鲁迈拉油田Upper Shale大型多层砂岩油藏的注水开发研究为例对该方法的可靠性进行验证,结果表明,与常规数值模拟方法相比,在预测精度接近的前提下,该方法可大幅节省计算时间。

According to the advantages of numerical simulation and conventional reservoir engineering methods, in consideration of reservoir heterogeneity and changes in development mode, a method of production performance quick prediction based on typical curves was proposed in this study. In this method, fine reservoir simulation is conducted based on the fine geological model of the large sandstone reservoir, and typical curves of different reservoir types under different development modes are generated; then based on results of reservoir type classification for all layers, geologic reserve evaluation result, well productivity and injectivity evaluation, production profile, the production indexes of the whole field can be predicted. The reliability of the new method was verified by the large multi-layered sandstone reservoir, Upper Shale reservoir in Rumaila Oilfield. The new method can reach prediction accuracy similar to conventional numerical simulation method, and takes shorter time.