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.
注氮气开发注采压差大于注二氧化碳开发注采，小于注水开发注采压差；
The pressure of nitrogen drive is greater than that of carbon dioxide drive but less than that of water flooding.
针对江苏油田欧北区块的地质条件和开发现状，建立了顶部注氮气重力驱数值模型。
In view of reservoir properties and development characteristics in Oubei block of Jiangsu Oilfield, a numerical simulation model of gravity drive of crestal nitrogen injection was established.
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