Page tree
Skip to end of metadata
Go to start of metadata


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 ReadingsDiagnosticsTypical Recommendations
Pressure Gradient ChangeEither OGC or FWLPick OGC/FWL
The pressure of some Hydrocarbon Beddings stay at initial pressure while most others deplete The beddings are not depleted The overlooked Hydrocarbon Beddings should be connected to production
The pressure of some Hydrocarbon Beddings is much lower than most othersThe layers deplete faster

Revise geological model in terms of connectivity of Hydrocarbon Beddings

Arrange pressure support to depleted Hydrocarbon Beddings

The pressure of some Hydrocarbon Beddings is much higher than most othersThe Hydrocarbon Beddings are getting a better pressure support from aquifer or gas cap or water injection

Revise geological model in terms of connectivity of Hydrocarbon Beddings

Restrict injection in these Hydrocarbon Beddings

The pressure in overlying/underlying water reservoir is regularThe area around the new well was most probably not facing the thief production/injectionThe expectations from the current reservoir model check out !
The pressure in overlying/underlying water reservoir is lower than that of oil/gas payThe area around the new well was most probably subject to thief productionCheck 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 payThe area around the new well was most probably subject to thief injectionCheck which offset well is having a thief injection and shut it off



See Also


Petroleum Industry / Upstream / Subsurface E&P Disciplines / Well Testing / Subsurface Well Testing / Open-Hole Well Test

Well & Reservoir Surveillance ]



  • No labels