承压水完整井井群互阻计算中流量削减法研究

Study on discharge reduction method for wells interference calculation of confined full wells

在水源地的井群规划中常需要进行井群互阻(也称井群干扰)计算。对承压水完整井井群互阻计算中流量削减法的出水量减少系数进行了分析,指出了以往某些文献中该系数计算的不合理之处。建立了干扰抽水的附加降深与单独抽水的附加降深的关系式;推导了表征干扰抽水出水量减少系数与水位降深关系的实用方程组。利用此方程组,已知干扰抽水时各井的水位降深,可计算各井的出水量减少系数,进而计算干扰出水量;或反之。通过实例验证了所提出的流量削减法的正确性。

The wells interference （also known as the wells disturbance） calculation is commonly used in the wells planning at water source area. The decreasing coefficient of well discharge calculated by the discharge reduction method for the wells interfer-ence calculation of the full confined wells is analyzed,and some irrational points in the coefficient calculation in the previous lit-eratures are pointed out. The relation of additional drop depth under interference pumping and the ping is established. A practical equation group is derived,which manifests the relationship between the decreasing coefficient of well discharge and the drop depth under interference pumping. By the equation group, when the drop depths of different wells un-der interference pumping are known,we can calculate the decreasing coefficient of well discharge,and deduct under interference or vice versa. The correctness of the presented discharge reduction method is verified by