Short-term Pressure Transient Analysis performed in open-hole well with wireline pressure gauge.
Can be complemented by downhole fluid sampling with the same toolstring.
The key objective is to measure formation pressure and permeability at specified downhole locations.
It usually does not reach the fully developed radial flow to assess the reservoir thickness.
Below is the table summary of typical WFT Readings, the typical diagnostics and typical recommendations.
| WFT Readings | Diagnostics | Typical Recommendations |
|---|
| Pressure |
Gas-Oil Pick Water-Oil Gradient Change | Pick HC beddings stay Means that these depleted and some HC beddings is Means that these some HC beddings is Means that these beddings Means that most probably the well did not face | well was most probably not facing the thief production/injection | The expectations from the current reservoir model check out ! |
| The pressure in overlying/underlying water reservoir is lower than that of oil/gas pay |
Means that most probably the | The area around the new well was most probably subject to thief production | Check which offset well is having a thief production and shut it off |
| The pressure in overlying/underlying water reservoir is higher than that of oil/gas pay |
Means that most probably the | The area around the new well was most probably subject to thief injection | Check which offset well is having a thief injection and shut it off |
See Also
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Petroleum Industry / Upstream / Subsurface E&P Disciplines / Well Testing / Subsurface Well Testing / Open-Hole Well Test
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