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Doc v4.20.01 - © KAPPA 1988-2011 Guided Session #6: Compositional Thermal Option • RubGS06 - 9/22
In our example we chose a GOC at the Reference depth of 6120 ft. We next set the ‘Reference
Initial Pressure’ to 1100 psia and select a WOC at 6300 ft.
Fig. C01.13 • Initial state definition dialog
Click on ‘OK’ to validate the initial state setup. For easiness, we keep the default KrPc
definition and just click ‘OK’ in the reservoir properties dialog.
Note:
In the present case, Rubis computes, at the GOC, the following molar compositions (not yet
accessible to users):
%mol C2 %mol C7 %mol C10
Oil 0.6368 0.2597 0.1035
Gas 0.9133 0.0741 0.0126
Table C01.14 • Calculated phase compositions at the GOC
To illustrate the consistency of the compositions computed at the GOC, one could go back to
the compositional PVT definition dialog and set in turns these two compositions as the
reference composition. By plotting the phase envelopes for these two compositions on top of
each other, it would give the plot presented in Fig C01.15. We can see that the envelopes
cross at the specified GOC conditions. Care must then be taken in setting the ‘Reference Initial
Pressure’ so that this condition can be met.