Velocity distribution can be expressed by a logarithmic formula for the inner zone and a parabolic formula for outer and surface zones.

底部内区流速分布可用对数公式表示；外区和表面区可用二次抛物线公式表示。

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However, under the different conditions of flow and boundary, exponent values in the exponential formula and related parameters in the logarithmic formula are different.

然而，在不同水流与边界条件下，其指数公式中的指数大小与对数公式中的有关参数有所不同。

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It was found that in double logarithmic coordinates, the relationship of formation factor and porosity is a second order function and no longer the linear formula proposed by Archie in 1940's.

在双对数坐标系中，由低孔隙到高孔隙整个范围，砂岩地层因素与孔隙率的关系为一个二次函数。

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