低渗透油藏比中高渗透油藏的压力波传播速度慢。
And low permeability reservoir is slower than mid-high permeability reservoir in pressure wave propagating velocity.
流体流动边界不断向外扩展是低速非达西渗流压力波传播的特点。
The fluid flowing boundary extends outwards continuously is the feature of pressure propagation with low velocity Non Darcy percolation.
启动压力梯度使压力波传播范围变小，井底污染会造成一个附加压力降。
The spread range gets smaller because of threshold pressure gradient, and there will be a additional pressure drop in the bottom of the well because of the skin damage.
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