Gravity drive becomes effective in the late stages of production on some gas-drive oil reservoirs.

有某些气驱油藏的开采晚期，重力驱动变得有效。

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Gravity drive is effective in the early stages of reservoir development only when there is high relief in the reservoir rock and oil column.

重力驱动仅在储层岩石中存在高闭合度和油柱的情况下在储层开发的早期是有效的。

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The results show that oil recovery can be enhanced effectively by gravity drive of crestal nitrogen injection for increasing oil production and decreasing water cut.

研究结果表明，气顶油藏顶部注氮气重力驱可以有效地提高采收率，达到降水增油的效果；

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From inspiring Newton's theory of gravity to the wassail ceremonies that drive evil spirits from the trees each January, the orchard has long been a place of quiet contemplation and a very British kind of magic.

BBC: England's West Country: Still the apple of our eye