Research Article
Real-Time Interpretation Model of Reservoir Characteristics While Underbalanced Drilling Based on UKF
Table 2
Comparative analysis of EKF and UKF estimated results.
| Reservoir unit | Reservoir permeability (mD) | Time of convergence to 10% (min) | True value | UKF | EKF | UKF | EKF |
| 1 | 250 | 218 | 213 | 21 | 26 | 2 | 500 | 450 | 439 | 21 | 26 | 3 | 350 | 379 | 386 | 18 | 25 | 4 | 150 | 189 | 198 | 25 | 29 | 5 | 50 | 69 | 71 | 27 | 25 |
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