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气井高速非达西流动附加压降计算公式的修正

Well Testing(2004)

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Abstract
通常情况下,气井井轴周围的高速流动为非达西流动,产生附加压降.Forchheimer通过实验,提出了描述非达西流动的二次方程.但目前在计算平面径向非达西流动附加压降时,将上积分边界定为气井供气边界,与实际情况不符合.根据气体实际流动情况,对公式给予修正,并以实例比较了两公式计算的差别,证实气井实际非达西流动边界的影响不可忽略.
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Key words
Gas well,Non-Darcy flow,Pressure drop,Reynolds number
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