随着异常高压气田开发过程的进行，地层压力逐渐下降，进而诱发岩石渗透率损失是不可逆的。
The permeability loss is not reversible since the reservoir pressure decreases gradually as gas exploitation is conducted in abnormal pressure gas reservoirs.
对于一口新井，确定原始地层压力、有效渗透率、总表皮系数、附加压力损失和流动效率，是试井的重要任务。
For a new well, it is an important work to determine initial reservoir pressure, effective permeability, summary skin coefficient, supplementary pressure loss and flow efficiency.
在稳流试验台上进行了微粒过滤器的压力损失与流量测试试验，运用测得的数据计算了微粒过滤器的渗透率。
In steady flow rig the pressure drop and the mass flow rate of the DPF were measured, and the measured data are used in the estimation of DPF permeability.
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