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Ecrin v4.20 - Doc v4.20.01 - © KAPPA 1988-2011 Rubis Guided Session #5: Thermal Option • RubGS05 - 9/24
The heat loss coefficient is the overall heat transfer coefficient between the wellbore center
and the external formation (accounting for combined effects of tubing, casing, cement,…).
Above the reservoir top, the external temperature is assumed to remain constant.
Fig. B04.6 • Wellbore definition for P01
Note: When the ‘Only hydrostatic gradient’ or ‘Only above reservoir’ option is chosen, a
simplified well model is used and the temperature is uniform inside the wellbore portion
contacting the reservoir. As a consequence, the use of these two options is not
recommended in a thermal context.
Exit and accept by pressing OK.
Click on the ‘Controls’ button in the ‘Reservoir – Wells’ dialog to define the production
schedule for the well P01. The following dialog displays all controls at this well in a tabular
format, the table is empty when viewed for the first time. Click on ‘Add’ to create a new control
for this well:
Change the target mode to ‘Injector’, the type to ‘Q Wat (BH)’, meaning that the well will
inject at constant bottom rate. In the corresponding Value cell (highlighted in red) enter -700
B/D. The negative sign is mandatory for injection mode (convention).
Keep the corresponding constraint type to ‘P Max(BH)’ (Pressure), and enter 14700 psia for
the value of this constraint.
Add another control after 5 hrs. Select a ‘Producer’ mode, with ‘Q Tot (BH)’ as a target type,
meaning that the well will be producing at constant bottom rate. In the corresponding Value
cell (highlighted in red) enter 0 B/D. This indicates a shut-in period. Keep the corresponding
constraint type to ‘P Min(BH)’ (Pressure), and enter 14.7 psia for the value of this constraint.
Set the injection temperature to 50 °F.