The acoustic field can prevent and remove the scale, lower the viscosity of oil, enhance the seepage flow velocity.
声场还可以使出油井防垢、除垢，降低原油粘度，提高其渗流速度。
With the formulae, the paper discusses the possible relationship between the water seepage flow velocity and the slopes of oil (gas) equipotential surfaces.
根据此关系式，讨论了各种情形水流速度与油气等势面坡度的关系。
Traditional dilution theory cannot measure the velocity precisely of seepage flow for the interference of vertical flow in the multi-aquifers.
传统的点稀释法由于垂向流的干扰无法测定渗透流速。
Darcy's law can be applied to unsaturated flow subject to certain restrictions on seepage velocity.
达西定律也适用于渗透速度有一定限制的非饱和水流。
Darcy's law can be applied to unsaturated flow subject to certain restrictions on seepage velocity.
达西定律也适用于渗透速度有一定限制的非饱和水流。
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