河流相储层夹层和水淹状况定量分析

Quantitative analysis of interbed and watered-out in fluvial facies reservoir

夹层是河流相储层非均质性描述中的一个重要因素。文中利用储层流动层带指标FZI,构建了定量表征储层非均质性的参数——流动层带指标变异系数,并对夹层的发育程度与储层非均质性之间的关系进行了相关性分析。分析表明,夹层发育的数目和规模与河流砂体的类型有关,与储层非均质性有着较好的相关性,在一定程度上制约着储层非均质性的强弱。储层非均质性与油层水淹程度相关分析表明,不同类型河道砂体及非均质性程度的差异,对应了储层各自不同的水淹特征。

Interbed is an important parameter to delineate the reservoir heterogeneity in fluvial facies. This paper builds one kind of parameter for quantitatively characterizing reservoir heterogeneity with flow zone index（FZI）. The correlation analysis between interbed development and reservoir heterogeneity is done. It is proved that the number and thickness of interbed are not only related with fluvial sand body types, but also keep good correlation with reservoir heterogeneity, which confines the intensity of reservoir heterogeneity. Correlation analysis of reservoir heterogeneity and watered-out degree reveals that various fluvial sand body and reservoir heterogeneity intensity are respectively characterized by different watered-out features.