Pressure difference between formation pressure  and wellbore flowing pressure  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 ]