Research Article
Research on Effectiveness and Application of Fixed-Plane Perforation Fracturing Technology in Ultra-Low-Permeability Reservoir
Table 2
Statistical analysis of water flooding in Chang 6 layer.
| | Water flooding classification | Formation thickness (m) | Proportion of thickness (%) | Original average oil saturation (%) | Remaining oil saturation (%) | Decrease of oil saturation (%) |
| | Without watering-out | 186.8 | 34.4 | 52.7 | 48.1 | 4.6 | | Watered-out | 222.0 | 40.9 | 53.9 | 39.1 | 14.8 | | Seriously watered-out | 18.5 | 24.7 | 50.5 | 28.5 | 22.0 | | Average | 142.4 | 33.3 | 52.4 | 38.6 | 13.8 |
|
|
