Cross-phase average formation pressure:

p_e = \frac{1}{N_\alpha} \sum_\alpha p_{e, \alpha}

where

formation pressure of -phase

number of fluid phases



In case of the most popular 3-phase Oil + Gas + Water fluid model:

p_e = \frac{1}{3} \left(  p_{eo} + p_{eg} + p_{ew} \right)

where

formation pressure of gas phase

formation pressure of water phase


See Also


Petroleum Industry / Upstream / Production / Subsurface Production / Well & Reservoir Management / Formation pressure

Subsurface E&P Disciplines / Production Technology