DST
Testing or widely known as Drill Stem Testing (DST) is the process of determining reservoir potential. Once the well is drilled to the target formation, DST tools are run in the well and attempts are made to flow the well to surface in a controlled manner. Various surface and downhole measurements are carried out which help in evaluating the reservoir potentials. Broadly speaking, DSTs are two kinds, Bare Foot DST (open hole DST) or Cased Hole DST.