How to exploit the residual oil in the stratum efficiently after water flooding, which accounts for 60 ~ 70% reserves in place, is a main task of petroleum engineering experts the entire world.

如何经济有效地开采水驱开发后残留在地层中的60 ~ 70%的剩余油，已成为世界各国油藏工程专家努力攻关的课题。

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In water flooding reservoirs. after entering high water cut period, residual recoverable reserves is the important basis ol reservoir management.

在注水开发油藏中，当油藏达到高含水期时，确定剩余可采储量是油藏经营管理决策的重要依据。

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Cities such as Shanghai and Tianjin have sunk six feet over the past decade and a half as precious underground water reserves are drawn down, causing skyscrapers to tilt and encouraging coastal flooding.

CNN: Economic miracle, environmental disaster