All issues Volume 75 (2020) Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles, 75 (2020) 62 Full HTMLComputation time as a function of the number of inversions, for 340 000 unknowns. We prefer 2 s (multi-scale) than 1 h (single scale).
| Number of inversions | Number of iterations | Computation time (s) |
|---|---|---|
| 1 | 400 000 | 3611 |
| 2 | 42 240 | 553 |
| 3 | 5300 | 78 |
| 4 | 670 | 11 |
| 5 | 100 | 2 |
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