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A specific implementation of Well Testing based on recording and interpretation of borehole (downhole or THP) pressure response to the pre-designed sequence of increasing and decreasing flow rate variations (also called "cycles" or "pulses" ) at one or more wells (called "generators" or "pulsers") inducing pressure pulse propagation across the field.
The usual practise practice is to create 5 – 10 pulses.
It splits into two categories:
| Pressure Self-Pulse Test (SPT) | Pressure Pulse Interference Test (PIT) |
|---|---|
The pressure response to rate variation is recorded |
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in the same well where the flowrate is varying and in this case is called |
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The pressure response to rate variation is recorded in the offset |
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wells and in this case is called |
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Workflow
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| 1 | Designing flowrate variation pulse sequence for disturbing wells (also called generators) based on the field primary data |
| 2 | Field operations on suspending the downhole gauges (if PDG is not available) |
| 3 | Performing flowrate variations according to the PCT design |
| 4 | Retrieving the downhole gauges |
| 5 | Downloading the data from the downhole and surface gauges |
| 6 | Primary data processing (gauge syncronization and filtering) |
| 7 | Implementing pressure pulse-code decomposition (PCD) |
| 8 | Recognising the PTA type-library diffusion models for decomposed DTR/CTR and type-curve fitting them with analytical and/or numerical pressure diffusion models |
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