Drill Stem Testing Drill Stem Testing (DST) is a critical procedure in oil and gas exploration used to evaluate the productive capacity, pressure, and permeability of a geological formation while drilling. The test is conducted by lowering a tool into the welbore that temporarily isolates a section Dyn the formation. This allows reservoir fluids--such as oil, gas, or water-to flow into the drill stem under controlled conditions without completing the well. Data collected from DST, including flow

A drill stem test (DST) is a procedure that determines the pressure, permeability and productive capacity of a geological formation while drilling a well. The test is crucial in measuring pressure behavior at the drill stem and is an effective way of obtaining data on the formation fluid, and determining whether a well has found a commercial hydrocarbon reservoir. Drill stem testing can be applied in the following ways: 1. Cased Hole stimulation This testing is done after the well is cased and u