In well testing and production analysis it means the fluid pressure value at some downhole reference depth.a certain downhole point of wellbore
The usual notation is
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Unlike the original meaning of bottomhole the Bottomhole , the bottomhole pressure may not necessarily refer to the bottom of the lowest accessible point of the borehole and may refer to sandface depth or the sandface depth or to the pressure gauge hanging location.
See Also
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Petroleum Industry / Upstream / Production / Subsurface Production / Well & Reservoir Management
Subsurface E&P Disciplines / Production Technology
[ Permanent Downhole Gauge (PDG) ]
[ Estimating Datum Pressure from downhole pressure gauge ]