... draw-down bottom pressure curve 抽汲期间井底压力曲线 drawdown curve 压降曲线；产量下降曲线 drawdown deformation 收缩变形 ...
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曲线从初期的最高产量至后期井枯竭时的最低产量平滑下降。
The curve tends to smoothly decline with the highest production rate at first and the lowest production rate later when the Wells become stripper Wells.
通常情况下，这个曲线达到顶点时，是能源储备的百分之五十枯竭的时候，在此之后根据回报递减的规律，产量不可逆转地缓慢下降。
Typically, the peak of this curve occurs when reserves are 50 percent depleted, which is followed by an irreversible slow decline in production following the law of diminishing returns.
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