Influence of nonuniform skin effect on steady radial flow in anisotropic confined aquifer

WANG Yu-lin; XIE Kang-he; WANG Kun; LI Chuan-xun; HUANG Da-zhong

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Influence of nonuniform skin effect on steady radial flow in anisotropic confined aquifer

更新时间：2026-06-25

- Influence of nonuniform skin effect on steady radial flow in anisotropic confined aquifer
- Vol. 32, Issue 7, (2011)
- 作者机构：
  
  1. 浙江大学软弱土与环境土工教育部重点实验室,杭州,310027
  2. 武夷学院环境与建筑工程系，福建武夷山,354300
- 作者简介：
- 基金信息：
- DOI：
  CLC： TV12
- Online First：30 June 2011，
  
  Published：2011
- 稿件说明：
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WANG Yu-lin, XIE Kang-he, WANG Kun, et al. Influence of nonuniform skin effect on steady radial flow in anisotropic confined aquifer[J]. 2011, 32(7).
DOI：

WANG Yu-lin, XIE Kang-he, WANG Kun, et al. Influence of nonuniform skin effect on steady radial flow in anisotropic confined aquifer[J]. 2011, 32(7). DOI：

摘要

考虑表皮效应竖向非均匀分布，建立各向异性承压层3D稳态井流数学模型，为求得问题的解，首先将表皮效应系数视为分段连续函数，再根据该分段函数将承压层划分成N层，然后通过差分法将问题转化为求解矩阵微分方程边界值问题，最后通过矩阵理论求得相应问题的解。应用数学软件对所求得解进行编程，并应用于实例计算和分析中。结果表明，在距竖井较近处，承压层水头降和流量沿竖向分布均与表皮效应系数函数变化趋势相反，即承压层某深度处的表皮效应系数越大（小），则相应位置的水头降和流量越小（大）；而距竖井较远处，仅当竖向渗透系数相对于水平渗透系数较小时，才仍具有前述变化规律；承压层不同深度处的水头降沿径向的分布曲线的幅度值，不仅取决于该处的表皮效应系数大小，而且取决于竖向渗透系数与水平渗透系数相对值大小

Abstract

With consideration of nonuniform skin effect factor

the mathematical model for 3D radial flow for anisotropic confined aquifer is presented. To attain solution for the corresponding problem

the skin effect factor is deemed as piecewise continuous functions

according to which the confined aquifer is divided into N layers. Then the method of finite difference is used to transfer the original problem into matrix differential equation with boundary conditions; and finally

by matrix theory

the solution is attained. With mathematical software

the solution is applied to numerical examples. Results show that: In the region close to vertical well

the variation of drawdown and flux component is inversely related to the skin effect factor; that is

larger skin effect factor leads to smaller drawdown and flux

vice versa

while in the region far from vertical well

the same tendency of variation keeps only for the situation that vertical permeability is far smaller than radial permeability. Therefore

the amplitude value of the curves s*- r* for different layers of confined aquifer depends on both the value of skin effect factor and the ratio of vertical permeability to radial permeability.

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