Page 19 - Transmissibility Corrections and Grid Control for Shale Gas Numerical Simulation

VA - DF: Transmissibility Corrections and Grid Control for Shale Gas Numerical Simulation p 18/23
Figure 20 – Numerical forecasts for various upscaling levels
Figure 21 – Transient numerical results for various upscaling levels
In [3], the time scale resolution of a simulation was investigated as a function of the
coarsening level. The conclusion was that the size of the first grid cells (i.e. the cells close to
the well or the fractures) may be chosen as a simple function of the investigation radius r, r
being evaluated at the desired time resolution t  .
t
ct
k
r 
 

 
0
1E+6
2E+6
3E+6
4E+6
5E+6
Liquid rate [STB/D]
0
2E+5
4E+5
6E+5
8E+5
1E+6
1.2E+6
Liquid volume [STB]
22442 cells
19242 cells
18442 cells
12542 cells
10742 cells
8342 cells
0 4000 8000 12000 16000 20000 24000 28000 32000 36000 40000 44000 48000
Time [hr]
100
200
300
Pressure [psia]
1E-3 0.01 0.1 1 10 100 1000
Time [hr]
1
10
100
1000
Pressure [psi]
22442 cells
19242 cells
18442 cells
12542 cells
10742 cells
8342 cells