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

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Purpose of Well Testing in High-Gas Reservoirs Well testing helps determine the reservoir’s capability to produce hydrocarbons—especially in reservoirs with high gas-to-oil ratio (GOR)—and provides data on: Reservoir pressure and temperature Permeability and skin factor Fluid composition and phase behavior Productivity index and deliverability Wellbore and reservoir behavior under dynamic conditions Challenges of High-Gas Content: Phase behavior: Gas expands rapidly when pressure drops, affectin

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