DESCRIPTION

A drill stem test (DST) is a temporary completion of a wellbore that provides information on whether or not to complete the well. The zone in question is sealed off from the rest of the wellbore by packers, and the formations' pressure and fluids are measured. Data obtained from a DST include the following, fluid samples, reservoir pressure, formation properties including permeability, skin, and productivity estimates, including flow rate and hydrodynamic information.