Synonym: Pressure Build-Up (PBU) = Build-Up Survey (BUS)
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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
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Interpretation of BUSPBU 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 to pressure gauge data records
In some cases one can uses Horner model with simplified version of PBU interpretation procedure.
See Also
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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) ]