chapter  4
3 Pages

Step Drawdown Test Analysis

WithWilliam C. Walton

One of the components of drawdown in a production well is well loss due to the turbulent flow of water through the well face and inside the casing to the pump bowls. Well loss is estimated using data collected during a step drawdown test which consists of operating the pump in the production well during three successive periods usually 1 hour in duration at constant fractions of full capacity. Water levels in the production well are measured at frequent intervals as is the discharge rate.