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综合运用辽河西部凹陷齐9—欢50区块油藏静、动态资料,建立了杜家台油层储层层内、层间及平面3个层次的宏观非均质模式,揭示出扇三角洲前缘低渗透储层剩余油的分布规律。研究表明,该储层宏观非均质性强,层内剩余油主要富集在正韵律砂体的上部和复合韵律砂体的低渗透、强非均质部位;平面剩余油主要分布在扇三角洲水下分支河道砂体边缘、连通性差或分布局限的砂体内;层间剩余油富集程度与纵向上层间旋回性基本一致,在物性差、非均质性相对强的层位富集。研究认为宏观非均质性控制平面和垂向剩余油的形成与分布。
Based on the static and dynamic data of Qi 9-Huan 50 block in west depression of Liaohe Basin, the macroscopic heterogeneous model of three layers of reservoir layers in Dujiatai oilfield is established, and the fan delta front Distribution of Remaining Oil in Low Permeability Reservoirs. The results show that the reservoir is macroscopically heterogeneous and the remaining oil mainly accumulates in the low permeability and strong heterogeneous parts of the upper part of the positive rhythm sand body and the composite rhythm sand body. The remaining oil in the plane mainly distributes in the fan delta In the sand bodies with poor connectivity and confined distribution, the degree of enrichment of remaining oil in the interlayer is basically consistent with that in the upper strata, and is enriched in layers with relatively poor physical properties and relatively high heterogeneity. The study considers the formation and distribution of macroscopic heterogeneous control planes and vertical residual oil.