Flow to a finite diameter well in a horizontally anisotropic aquifer with wellbore storage

Abstract

Methods for determining horizontal anisotropy in transmissivity from pumping tests have generally been limited to where the pumping well can be assumed infinitesimal. This work presents a Laplace transform solution to the problem of flow to a finite diameter well in a horizontally anisotropic aquifer with wellbore storage. It is also shown that the solution is adequately approximated by an equivalent isotropic model with a corrected effective well radius for moderate anisotropics (i.e., Ty/Tx < 25). Copyright 2007 by the American Geophysical Union.