ABSTRACT
Wells are drilled either for exploration or exploitation purposes. With exploration wells, the objective is to collect information on the geology of the underlying aquifer. Apart from describing the various geological layers encountered (well logs), the physical properties are commonly assessed by conducting aquifer tests. ese aquifer tests are commonly preceded by step-drawdown tests to determine the proper discharge rate. Proper in this respect means that good measurable drawdowns are produced in the piezometers, and that the drawdown in the pumped well does not reach the top of the well screen during the pumping period.
