Table 7
Comparative results of mobility control improvement on some properties during the assessment of tertiary injection schemes.
| Property | Tertiary injection schemes |
|||
|---|---|---|---|---|
| WF | SP blend |
Comments | ||
| CEOR 1 | CEOR 2 | |||
| Initial oil saturation (S oi) | 0.69 | 0.34 | 0.29 | |
| VPInj up to BT | 0.11 | 0.26 | 0.30 | Breakthrough delay: mobility control |
| RF up to BT | 16.03 | +2.01 | +0.27 | IFT reduction and displacement efficiency improvement |
| PVinj up to W cut of 80% | 1.48 | – | – | |
| RF up to W cut of 80% | 38.2 | – | – | |
| PVinj up to W cut of 95% | 6.8 | 1.36* | – | *Slight water production management |
| RF up to W cut of 95% | 49.95 | +8.48 | – | IFT reduction and displacement efficiency improvement |
| RF at final of the test | 49.95 | +8.48 | +1.91 | SP blend slugs improve the process efficiency |
| Residual oil saturation (S or) | 0.34 | 0.29 | 0.27 | Oil residual saturation reduction in each step |