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通过对精细地质模型的３ 个显著特征的剖析并结合萨北油田北三区西部东块主力油层的沉积特征， 论证了该区块主力油层各类河流相精细地质模型的特征， 在此基础上， 提出了剩余油分布的类型、分布方式和存在比例， 为主力油层的三次采油提供了地质依据。
Based on the analysis of three salient features of the fine geological model and the sedimentary characteristics of the main oil layers in the eastern block of the Beisan area in the Saibei oilfield, the characteristics of the fine geological models of various river facies in the main oil layers of the block are demonstrated. On this basis, The types, distribution modes and existing proportions of remaining oil distribution are proposed to provide the geological basis for the tertiary oil recovery of the main oil layer.