Pressure difference between formation pressure p_e and wellbore flowing pressure p_{wf} at sandface:
| \Delta p = p_e - p_{wf} |
See Also
Petroleum Industry / Upstream / Subsurface E&P Disciplines / Well Testing / Pressure Testing / Pressure Transient Analysis (PTA) / PTA Diagnostic Plot
[ Well & Reservoir Surveillance ] [ Pressure Diffusion ] [ Pressure drop ]