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关于用消除井损计算渗透系数的问题已有讨论,笔者也提出几点看法。一、关于Q～s抛物线方程式采用抛物线方程式消除井损计算渗透系数首先应判定该式对Q～s曲线能否全面正确拟合。而拟合抛物线式与其它常用的直线式、对数式、指数式一样,各有其适用范围。而且由其变换后的方程来决定的。若为直线型,则该关系式适用;若为曲线型,则不适用。所以截距法要求“s/Q(或Δh~2/Q)～Q曲线呈直线。而且用”截距法求渗透系数只适用于Q～s呈抛物线的方程式。二、关于多项式许多实际资料表明,井的各种水头损失不仅与Q的2次方有关,而且还与Q的3、4方有关。用插值法求得的Q～s多项式,
The issue of calculating the permeability coefficient by eliminating well losses has been discussed. The author also puts forward several opinions. First, on the Q ~ s parabolic equation using the parabolic equation to eliminate the well loss calculation of the permeability coefficient First, it should be determined that this type of Q ~ s curve can be a full and correct fitting. The fitting parabolic type has the same scope as other commonly used linear, logarithmic, and exponential methods. And it is determined by its transformed equation. If it is linear, the relation applies; if it is curvilinear, it does not apply. Therefore, the intercept method requires that the “s/Q” (or Δh ~ 2/Q) ~ Q curve be a straight line, and that the “permeability coefficient” obtained by the “intercept method” is only applicable to the parabola equation of Q ~ s. 2. Many polynomials The actual data show that the loss of various heads of a well is not only related to the second power of Q but also related to the third and fourth parties of Q. The Q~s polynomial obtained by the interpolation method,