Fluid volume consisting of two or more contacting phases
In most practical cases in Petroleum Industry it will be a 3-phase fluid (water, oil and gas).
The total fluid density of multiphase fluid is given by following equation:
(1) | \rho = \sum_\alpha s_\alpha \, \rho_\alpha |
where
See also
Natural Science / Physics / State of matter / Fluid
Petroleum Industry / Upstream / Subsurface E&P Disciplines / Fluid Analysis