Something I have just noticed with Future which perhaps you could help me explain: I have been checking the forecast output for the wells in my model and something strange seems to be happening with the GOR. The reservoir solution GOR is set to 0.5 kscf/stb:
I have used the FGLR method to forecast gas production and set free gas to zero (the well produces well above the bubble point):
As such, I expect the model to forecast a GOR of 0.5 kscf/stb. However, this is not quite the case as the forecast carries a GOR of 0.492:
RunName |
EntityName |
Date |
Oil Rate (stb/day) |
Condensate (part of oil) Rate (stb/day) |
Total Gas Rate (kscf/day) |
Produced Gas Rate (kscf/day) |
Solution Gas Rate (kscf/day) |
Water Rate (stb/day) |
GOR |
Janice 2014.07.17_Forecast |
P3(13) |
1-Jul-2014 |
614.83 |
0.00 |
302.44 |
302.44 |
302.44 |
177.75 |
0.491902 |
Janice 2014.07.17_Forecast |
P3(13) |
1-Aug-2014 |
450.94 |
0.00 |
221.82 |
221.82 |
221.82 |
136.15 |
0.491902 |
Janice 2014.07.17_Forecast |
P3(13) |
1-Sep-2014 |
691.69 |
0.00 |
340.24 |
340.24 |
340.24 |
218.31 |
0.491902 |
Janice 2014.07.17_Forecast |
P3(13) |
1-Oct-2014 |
682.96 |
0.00 |
335.95 |
335.95 |
335.95 |
227.04 |
0.491902 |
Janice 2014.07.17_Forecast |
P3(13) |
1-Nov-2014 |
674.39 |
0.00 |
331.73 |
331.73 |
331.73 |
235.61 |
0.491902 |
Janice 2014.07.17_Forecast |
P3(13) |
1-Dec-2014 |
666.79 |
0.00 |
327.99 |
327.99 |
327.99 |
243.21 |
0.491902 |
Do you have any idea what may be causing this? It’s obviously not a large difference, but I would still like to be able to explain it. I wouldn’t rule out user error either! J If you need be to send the model across for a closer look, please just let me know.
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