- Volcanic Geothermal Systems have to be flow tested after the initial Exploration wells are drilled and completed. One well would be selected as the Production test well and another well would be selected as the Injection test well. After each well was tested, the roles would be reversed to ensure any well could be used for either role.
- Production testing of a well is designed to obtain several measurements: (1) Flow rate (i.e., can it self flow, what are flow rates for various surface settings); (2) Pressure (i.e., surface and downhole); (3) Temperature (i.e., surface and downhole); (4) Permeability (effective reservoir permeability).
- Injection testing of a well is designed to similarly obtain several measurements: (1) Injectivity Index (how easily fluid can be injected back into the reservoir without excessive pressure buildup); (2) Pressure and Temperature Response (reservoir response to slightly cooler fluids without undesirable geomechanical issues and without significant reservoir cooling).
- Testing of smaller diameter slimhole exploration wells have been tested and analysed to be able to predict applicable flow rates in larger diameter development well designs. Two phase flow may be different however, so fluid dynamics models would help improve accuracy.
- Pressure Transient Analyses use results from pressure buildup or drawdown tests and help calculate reservoir parameters such as transmissivity and storativity (storage coefficient).
