本文即是采用数值模拟的方法，研究在其它条件不变的情况下，柴油机结构对扫气效率的影响，以期达到指导柴油机气口结构设计的目的。
This thesis's purpose is to study the affect on the efficiency of the structure of the diesel engine with anything else fixed and to direct the design of the diesel's port structure.
对于地层非均质性的影响，通过注入聚合物段塞调驱，能起到防止气窜，增加注入气驱扫效率。
Prepositive polymer slug displacement can decrease the effect by the formation heterogeneity, prevent the gas breakthrough and improve the displacement sweep efficiency of the injective gas.
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