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.
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。
Gas injection into fractured reservoirs can maintain the formation pressure and improve the displacement efficiency.
注气可以维持裂缝性储层的地层压力。
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