孤东油田馆陶组河流相储集层流动单元模型与剩余油分布规律研究

综合应用多学科理论 ,系统研究了形成流动单元的控制因素 ,提出了河流相储集层流动单元识别、分类及评价方法 ,建立了流动单元模型。引用活度函数及层内差异等 6种数学方法在单井中识别流动单元 ,应用地震属性分析等 5种方法在剖面上识别流动单元。提出了流动单元定量分类评价方法 ,把孤东油田馆上段河流相储集层划分为 3种不同类型的流动单元 ,它们各自具有相应的岩性、物性和孔隙结构特征。应用判别分析方法得到确定流动单元类型的判别函数 ,建立起河流相储集层流动单元的判别标准。把流动单元与剩余油的研究紧密结合 ,研究剩余油在不同流动单元以及同一流动单元不同部位的分布规律 ,揭示了流动单元类型与剩余油分布的内在联系。预测了孤东油田馆上段储集层参数空间变化及剩余油的分布 ,指出不同流动单元的开采潜力 ,有效地指导了油田开发。参 5(窦之林摘 )

A Study on flow unit model and distribution of remaining oil in fluvial sandstone reservoirs of the Guantao Formation in Gudong oil field.

By using multi-subject theory comprehensively, the author systemically studies the factors controlling flow unit and puts forward a series of methods for recognition, classification and evaluation of flow unit. Six numerical methods such as active function and intra-layer difference etc. are applied in a well to recognizing the flow unit. And also five methods such as seismic attributes analysis etc. are applied on a cross section to recognizing the flow unit. By means of classifying and evaluating flow unit quantitatively, the fluvial facies reservoirs are divided into three different kinds of flow unit, which have their own lithology, petrophysics and pore structure characters. Discriminant analysis method is used to obtain the discriminant functions of determining the types of flow unit so as to establish the judgment standards of flow unit of fluvial facies. Combining the study of flow unit with the study of remaining oil closely, the distribution laws of remaining oil in different types or in different parts of a flow unit are studied, and based on this the author reveals the relationship between flow unit and remaining oil distribution, predicts the variation of reservoir parameters in space and the remaining oil distribution of the Upper Guantao Formation in Gudong oil field, and points out the development potential in different flow units, which can guide oil field development effectively.