A NEW SEMI-ANALYTICAL SOLUTION FOR A SLUG TEST IN A CONFINED AQUIFER UNDER THE EFFECTS OF WELL PARTIAL PENETRATION

摘要

This paper proposes a new semi-analytical solution for a slug test performed in a partially penetrating well within a confined aquifer system. A constant-flux solution, including well partial penetration and wellbore storage, is first derived and then converted into the slug test solution by means of the formula of Peres et al. (12). The new solution in the cases of well full penetration can be reduced to Cooper et al.'s solution (3) and coincides with the KGS model (Hyder et al. (7)); yet, in regard to well partial penetration, it differs from the KGS model (Hyder et al. (7)) due to the different assumption on the well boundary condition. An example demonstrates the applicability of the new solution to a field problem. The simulated results in a partially penetrating well reveal that a smaller screen length, anisotropic ratio, or specific storage can result in a slower recovery rate of the normalized head.