Once drilling operations are complete, the next critical step is the well test. This is where we move from cutting rock to truly understanding the reservoir’s potential.

Why Do We Test?
-Reservoir Evaluation: Pressure, permeability, and productivity index.
-Fluid Characterization: Oil, gas, or water – and their properties through PVT sampling.
-Well Performance: How the well responds under different flow rates.
-Reservoir Boundaries: Understanding drainage area and reservoir extent.
-Decision Making: Whether to complete, stimulate, or abandon the well.

How It’s Done
1.Well Preparation – Safe wellbore, perforations open, tools ready.
2.Flow Period – Allowing fluids to flow, measuring rates and pressures.
3.Shut-in Period – Closing the well to watch pressure build-up (gives reservoir pressure & permeability).
4.Data Recording – Surface & downhole gauges track pressure/temperature.
5.Fluid Sampling – Collecting oil, gas, and water for detailed lab analysis.

What We Learn
-Reservoir pressure & depletion status
-Fluid types and water cut
-Productivity index (PI)
-Reservoir heterogeneity & boundaries
-Basis for the final completion strategy

Key Procedures
1.Well Preparation: Ensure well is safe, perforations are clean, and downhole tools are ready.
2.Flow Period: Open the well to let reservoir fluids flow; measure flow rates and pressures.
3.Shut-in Period: Close the well to record pressure build-up, which reveals reservoir pressure and permeability.
4.Data Recording: Surface gauges and downhole memory gauges capture pressure/temperature.
5.Fluid Sampling: Collect oil, gas, and water samples for PVT (Pressure-Volume-Temperature) analysis.

Without well testing, we are “drilling blind.” With it, we unlock the reservoir’s true potential and decide the future of the well.