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将河口坝划分为单一河口坝和叠置河口坝2种类型,建立了不同厚度、不同渗透率、不同夹层频率、不同注采条件等共计18个概念模型,并数值模拟至模型极限含水。通过对数值模拟结果的对比分析,得到了河口坝剩余油的影响因素及剩余油分布模式。分析认为,影响2种类型河口坝砂体剩余油的最主要因素是渗透率级差和夹层位置与夹层上下储集层渗透率韵律特征;将单一河口坝砂体剩余油模式分为顶部富集型、均匀驱替型和底部富集型3种模型;将叠置河口坝砂体剩余油模式分为界面之上富集型、界面之下富集型和界面上下富集型3种模型。
The estuary dam is divided into two types: single estuary dam and superimposed estuary dam, and 18 conceptual models with different thickness, different permeability, different sandwich frequency and different injection and injection conditions are established, and numerical simulation is carried out until the model reaches the limit of water content. Through the comparative analysis of numerical simulation results, the influencing factors of remaining oil in estuary dam and remaining oil distribution patterns are obtained. The analysis shows that the main factors that affect the residual oil in the two kinds of estuary bar sand bodies are the difference in permeability and the rhythm of the permeability of the upper and lower reservoirs in the interlayer; the remaining oil models of the single estuary bar sand body are divided into the top enrichment , Uniform flooding and bottom enriched type. The remaining oil models of the superimposed estuary bar sand bodies are divided into three types: enriched type on the interface, enriched type on the interface and up and down enriched type on the interface.