减压井运行效果影响因素数值分析

针对减压井运行效果,开展数值模拟分析。对减压井贯入深度、井管直径、井间距、出水口高程以及滤层透水性等因素,进行二维渗流有限元计算,分析各个因素对减压井淤堵的作用大小及影响规律。计算结果表明:减压井贯入深度与滤层透水性对其效果影响很大,且随着贯入深度增加,滤层透水性增高,减压井出水效果逐渐提升;井管直径对井效影响较小,直径越大减压效果越好,但提升幅度不大;井间距和出水口高程对减压效果影响不大。

Numerical Analysis on Factors Affecting the Effectiveness of Relief-well

To obtain the effectiveness of relief-well, we performed two-dimensional seepage calculations on factors inclusive of penetration depth, pipe diameter, spacing, outlet elevation and filter-layer permeability by finite element method. According to the calculation results, we analyzed the effect of each factor on relief-well clogging and the influence regularities as follows: the penetration depth and filter-layer’s permeability have great impact on relief-well, and with the increase of penetration depth and filter-layer’s permeability, the effectiveness of relief-well gradually enhanced; pipe diameter has less effect on the relief-well, with the increase of pipe diameter, the effectiveness of relief-well gradually improved, but not much. The spacing between relief-wells and the elevation of outlet have not much influence on the effectiveness of relief-well.