Simulating Well Hydrodynamics

A recent model has enabled engineers to calculate, or at least estimate, the detailed hydrodynamics of a well system. The three governing equations, Jacob, the orifice, and energy are coupled into the model which calculates the velocities and head losses along the well screen and in the well proper. This is especially useful to determine the optimal dimensions of the pump intake and the effects of extending the pump intake into the well screen. The non-uniformity of water velocities entering along the well screen are given which aids in selecting the maximum discharge of the well that does not cause sand drive. This paper describes how this model can be used in well design which includes the screen and casing dimensions, sand filter, under-reaming, etc.;