《Hydrological Processes》杂志刊登“对稳流渗入位于承压含水层的不完整不透水边壁井的研究”

作者：Saivash Behrooz-Koohenjani, Nozar Samani, Mazda Kompani-Zare

刊物：Hydrological Processes ，2013年7月30日，27卷16期，2271–2279页

关键词：分析方法；底流 ；不完整井；安全泵送率 ；出砂

摘要：在松散沉积物含水层中，井需要加上套管，以使边壁不透水，水只能从底部流入。在泵送期间，井的底部产生的水力梯度使含水层组成物质一直处在流沙状态，这可能会导致管道和泵的磨损，甚至导致井结构的破坏。为了研究流沙的发生情况，本研究提出了对稳流渗入位于承压含水层的不完整不透水边壁井的分析方法。研究对该解决方法的有效性进行了数值分析评估，还检测了与含水层以及井的参数相应的井底最大垂直梯度的灵敏性。该分析方法以无因次曲线和方程的方式表示出来，可以很容易地用于设计安全泵送率，以及设计最优井的几何形状，以使井免受出砂的影响。该解决方法考虑了含水层材料的非均质性特征，可以用来确定含水层的水力传导率。

Steady flow to a partially penetrating blind-wall well in a confined aquifer

Authors: Saivash Behrooz-Koohenjani, Nozar Samani, Mazda Kompani-Zare

Journal: Hydrological Processes, Volume 27, Issue 16, pages 2271–2279, 30 July 2013

Keywords: analytical solution; bottom flow; partially penetrating well; safe pumping rate; sand production

Abstract：Wells in aquifers of loose collapsible sediment are cased so that they have a blind wall and gain water only from the bottom. The hydraulic gradient established at the bottom of these wells during pumping brings the aquifer materials in a quicksand state, which may cause abrasion of pipes and pumps and even the destruction of well structure. To examine the quicksand occurrence, an analytical solution for the steady flow to a partially penetrating blind-wall well in a confined aquifer is developed. The validity of the proposed solution is evaluated numerically. The sensitivity of maximum vertical gradient along the well bottom in response to aquifer and well parameters is examined. The solution is presented in the form of dimensionless-type curves and equations that can be easily used to design the safe pumping rate and optimum well geometry to protect the well against sand production. The solution incorporates the anisotropy of aquifer materials and can also be used to determine the hydraulic conductivity of the aquifer.

原文链接：http://onlinelibrary.wiley.com/doi/10.1002/hyp.9353/abstract