Research Article
Copolymer SJ-1 as a Fluid Loss Additive for Drilling Fluid with High Content of Salt and Calcium
Table 2
Fluid loss of drilling fluid changed with aging temperature.
| Experimental conditions | AV /mPa·s | PV /mPa·s | YP /Pa | API filter loss /mL |
| 120°C, 16 h | 43.5 | 34.5 | 9.20 | 10.6 | 140°C, 16 h | 38.5 | 32.0 | 6.64 | 10.6 | 160°C, 16 h | 20.8 | 17.0 | 3.83 | 11.5 | 180°C, 16 h | 13.0 | 9.5 | 3.58 | 12.1 | 200°C, 16 h | 13.0 | 11.0 | 2.04 | 12.5 | 220°C, 16 h | 12.5 | 11.0 | 1.53 | 13.0 |
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