通用非稳定井流试验数据分析的原理与方法

针对目前在分析非稳定井流试验数据以确定机井井损参数与含水层水文地质参数的方法，仅能在泰斯假设条件下应用的问题，文中对三次定流量非稳定流抽水试验过程中的降深表达式进行均值处理，构成一个三元非线性方程组，利用迭代法求解该方程组，能够计算出机井的井损系数C与非线性指数n。在计算出井损参数后，可以将机井中降深的线性项与非线性项进行分离，线性降深部分可以用于计算含水层的其它水文地质参数。与现有的方法相比较，文中的方法不要求井函数的具体形式为已知，在非线性指数n不论是否已知的情况下均可以应用，当n为已知时，能够使抽水次数减少一次，在稳定流的情况下也可以应用，在参数的计算过程中不需要进行图解计算。

Principle and method for analyzing unsteady pumping test data of well

A new method for determining the well loss parameters and hydrogeology parameters according to the analysis of unsteady well pumping test data is proposed.Based on the averaged drawdown expression a nonlinear equation group with three unknown variables is established and the well loss coefficient as well as the relevant coefficient can be determined by iteration.This method can separate the drawdown of pumping into linear and nonlinear parts and the linear part may be used to estimate the hydrogeologyical parameters of the aquifer.The proposed method has the advantages of not necessary to know the from of well function,not necessary to know the value of the relevant coefficient and the pumping rate may be reduced if the coefficient is known.All computation procedure may be programmed and carried out by computer.