In PORFLOW what are the units for Pressure, the Sources and Fluxes?
In default mode of PORFLOW, all mass transport equation for each phase is converted to a corresponding pressure equation in length units. In SI units, the pressure will be in meters. In multi-phase systems, the pressure for all phases is expressed in terms of the pressure of the 1st (or primary) phase. For example, for a 2-phase system, with water as the 1st phase and oil as the 2nd phase, all pressure are in meters equivalent of water. All boundary and initial conditions must be specified in terms of meters of the primary fluid. All sources (injection or withdrawal) are expressed in volumetric units; that is in units of mass flow rate of the fluid divided by its own density. For example in SI units, the mass is in Kg, the density in Kg/m3 and the source in m3/s. Any adjustment required to convert it to the volume of the primary fluid is performed internally and is transparent to the user. PORFLOW further allows the sources to be expressed in total rate (say m3/s), per unit volume (say
