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在垂直井注水开发的正韵津油层顶部往往留有大量剩余油，本文用数值模拟研究了在现有垂直井眼上侧钻超短半径水平井开来这些剩余油的效果。根据建立的地质模型和确定的水平井开采方案，用正交设计对９个地质开发因素进行了组合，并用多功能模型计算了２７个数值模拟方案。利用多元回归，分别从模拟计算结果得到计算正韵律油层垂直井采收率和计算用水平井开采剩余油提高采收率相对值的多元回归相关公式。结合经济分析应用这两个公式，可对正韵律油层利用水平井开采剩余油的可行性作出评价。
Large amounts of residual oil are often left at the top of Zhengyunjin oilfield developed by vertical well water injection. In this paper, the effect of side-drilling ultra-short radius horizontal wells on existing vertical boreholes to open these residual oil is studied by numerical simulation. Based on the established geological model and the determined horizontal well drilling plan, nine geological development factors were combined by orthogonal design and 27 numerical simulation scenarios were calculated by multi-function model. Using multivariate regression, the multivariate regression formulas for calculating the vertical well recovery of positive-rhythm reservoir and the relative value of remaining oil recovery recovery by horizontal well mining are respectively obtained from the simulation results. Combined with these two formulas for economic analysis, the feasibility of using the horizontal well to extract the remaining oil in the positive rhythm reservoir can be evaluated.