Synonym: Pressure Build-Up (PBU) = Build-Up Survey (BUS)
Pressure transient survey in producer during the pressure rise period caused by shutting well down or reducing its production rate (see Fig. 1):
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Fig 1. Build-up Survey starting after well is closed at 3,600 hrs and going through pressure recovering for 7 days (blue dots). The grey dash line shows bottom hole pressure history before 3,600 hrs in case it would have been recorded. |
Interpretation
Interpretation of PBU is based on:
- visual analysis of PTA diagnostic plot
- selecting pressure diffusion model from PTA Type Library
- fitting selected parameters of pressure diffusion model to pressure gauge data records
In some cases one can uses Horner model with simplified version of PBU interpretation procedure.
See Also
Petroleum Industry / Upstream / Subsurface E&P Disciplines / Well Testing / Pressure Testing / Pressure Transient Analysis (PTA)
[ Well & Reservoir Surveillance ] [ Pressure Transient Analysis (PTA) ] [ Drawdown survey (DD) ]