# PVDG¶

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.