储层流动单元划分方法在苏里格气田的应用

为了能更高效地开发苏里格气田，必须对储层内部结构等因素深入研究，表征它们的性质及对气体渗流的影响，因此从流动单元的角度对苏里格气田气体渗流机理进行研究是非常必要可行的。文章在渗流屏障分析基础上，运用了FZI、聚类分析和相关的分析方法，利用取心井资料和测井解释物性资料对苏里格气田盒8段下进行了流动单元的划分，共划分了3类流动单元，得出了每一类流动单元的判别函数，从而进行全区气井流动单元的划分。研究结果表明，物性和储集能力都较好的流动单元大部分位于心滩沉积微相中部，部分分布于心滩微相顶底部；河道沉积是控制物性较好流动单元的主要沉积微相之一。储层流动单元比沉积微相更精细地刻化了影响储层流体流动的地下结构，通过流动单元的研究可以预测剩余油的可能分布。

APPLICATION OF THE DIVISION METHOD OF RESERVOIR FLOW UNIT IN SULIGE GAS FIELD

In order to efficiently develop Sulige gas field, the factors of reservoir inner texture must be studied to express their properties and the influence on gas percolation. So, it is necessary to study the gas percolation mechanism of Sulige gas field starting from flow unit. Based on analyzing percolation barrier, the flow unit division of the lower zone of He 8 member in Sulige gas field is carried out with the core data and petrophysical log interpretation data by the methods of cluster analysis and correlation analysis. 3 types of flow unit are plotted and the discriminant of each type is derived thus conducting flow unit division of all gas wells in the area. The research result shows that the main units with superior reservoir petrophsical properties lie in the middle location of the mid-channel bars and partly locating the top and bottom; the river facies is one of the main sedimentary microfacies controlling the units with superior reservoir petrophysical properties. The flow unit division method shows better underground structure of the reservoir fluid flowing than the sedimentary microfacies method. The distribution of remaining oil can be forecast by studying the flow units.