单井混合抽水试验分层计算含水层渗透系数测试研究

本文根据施普德混合抽水试验的基本计算原则，在既无观测孔、也无法分层止水的情况下，对新疆焉耆盆地南部山前5号水井，开展了单井混合抽水试验分层计算含水层渗透系数的测试研究。首先采用图解法原理，计算出混合水井下部承压含水层的静止水位为47.232 m，并绘制了该含水层的Q-S曲线。在此基础上，分层计算得到了承压含水层的渗透系数Kb=6.968m d-1，潜水含水层的渗透系数Ka=4.979m d-1。通过与实际抽水试验计算结果的对比分析，验证了该方法的有效性和准确性，可为单井混合抽水试验分层计算含水层渗透系数提供参考。

DETERMINATION OF PERMEABILITY COEFFICIENT OF AQUIFERS BY SINGLE-WELL MIXED-LAYER PUMPING TEST

Based on Spude calculation principle of the mixed-layer pumping test, this paper has carried out a study on the permeability coefficient of aquifers by single-well mixed-layer pumping test in the No. 5 well in the south of Yanqi Basin, Xinjiang, under the condition of no observation holes and no stratified water stop. By means of graphical method, the static water level of confined aquifer in the lower part of the mixed-layer well is calculated to be 47.232m, and the Q-S curve of the aquifer is plotted. On this basis, the permeability coefficients of confined aquifer and phreatic aquifer are calculated by stratification, and the result is Kb=6.968md-1, Ka=4.979md-1 separately. By comparing with the actual pumping test results, the validity and accuracy of the method are verified. It can provide reference for the calculation of aquifer permeability coefficient in a single-well mixed-layer pumping experiment.