注氮气的效果对其注入速度是敏感的。
The effect of top-nitrogen injection is sensitive to injecting rate.
注入速度和不同段塞组合，对最终采收率影响不大。
While the injection rate and various combinations have little effect on the ultimate recovery rate.
注入速度和不同段塞组合，对最终采收率影响不大。
While the injection rate and various combinations have little effect on the ultimate recovery rate.
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