Table 2.
Evaluation results of drilling fluid rheological properties.
| Additives | T/°C | AV | PV | YP | YP/PV | FL | tg |
|---|---|---|---|---|---|---|---|
| /(mPa·s) | /(mPa·s) | /Pa | Pa/(mPa·s) | /mL | |||
| Blank | 25 | 3.6 | 2.1 | 1.40 | 0.67 | 12.0 | 0.07 |
| 120 | 2.6 | 1.8 | 0.70 | 0.39 | 14.0 | 0.18 | |
| PAM | 25 | 8.0 | 4.2 | 3.88 | 0.92 | 13.0 | 0.03 |
| 120 | 7.8 | 4.8 | 3.30 | 0.74 | 15.7 | 0.03 | |
| PAM +0.3%FCLS-3 |
25 | 3.6 | 3.1 | 0.51 | 0.16 | 16.2 | 0.03 |
| 120 | 6.0 | 4.5 | 1.20 | 0.25 | 15.2 | 0.04 | |
| Modified starch | 25 | 4.9 | 2.8 | 2.15 | 0.77 | 11.0 | 0.09 |
| 120 | 9.8 | 8.5 | 2.50 | 0.15 | 15.7 | 0.11 | |
| Modified starch +0.3%FCLS-3 |
25 | 3.5 | 2.2 | 1.33 | 0.60 | 10.1 | 0.19 |
| 120 | 5.7 | 4.5 | 1.20 | 0.55 | 15.5 | 0.11 |