PVDGΒΆ

The PVDG table is used to define the properties of a dead gas for a range of different temperature and pressures.

Below an example where data is given for only one temperature.

PVDG
  DATA_UNITS ! Metric in the Eclipse sense
    PRESSURE Bar
    FVF
    m^3/m^3
    VISCOSITY cP
  END
  DATA
    TEMPERATURE 15.0
    1.013529   0.9357635 0.0080
    18.250422  0.0678972 0.0096
    35.487314  0.0352259 0.0112
    69.961099  0.0179498 0.0140
    138.908669 0.0090619 0.0189
    173.382454 0.0072653 0.0208
    200.00     0.0063404 0.0223
    207.856239 0.0060674 0.0228
    276.803809 0.0045534 0.0268
    345.751379 0.0036439 0.0309
    621.541659 0.0021672 0.0470
  END !end TEMP block
  END !endDATA
END !end PVDG

The PVDG data may contain several different pressure tables, one for each temperature. In the pressure table, column 1 is the pressure, column 2 is the gas formation volume factor (\(B_g\)), column 3 is the gas viscosity (\(\mu_g\)).

The pressure in column 1 must increase monotonically, and the pressure tables must be ordered for increasing temperatures. The number of pressure points given for each temperature must be the same, however the values and range of the pressure can vary. Temperatures and pressures outside the given range are extrapolated. When pressure data are available for only one temperature, the properties are considered isothermal.

The default units used by this table are:

  • Bar for the pressure, \(m^3/m^3\) for \(B_g\)

  • math:cP (centipoise) for the viscosity,

  • C for temperature.

DATA_UNITS specifies units different than the default values, and include only the properties (in any order) for which units are needed. The temperatures can currently be entered only in degrees Celsius.