Research Article
Copolymer SJ-1 as a Fluid Loss Additive for Drilling Fluid with High Content of Salt and Calcium
Table 1
Relationship between SJ-1 concentration and fluid loss.
| SJ-1 concentration /wt% | AV /mPa·s | PV /mPa·s | YP /Pa | API filter loss /mL |
| 0.0 | 12.5 | 7.0 | 5.62 | 23.0 | 0.1 | 16.0 | 10.0 | 6.13 | 11.8 | 0.3 | 19.5 | 13.0 | 6.64 | 11.2 | 0.6 | 23.5 | 16.0 | 7.67 | 10.4 | 0.9 | 30.0 | 21.0 | 9.20 | 9.4 | 1.2 | 37.0 | 26.0 | 11.24 | 9.2 | 1.5 | 44.0 | 31.0 | 13.29 | 9.2 | 1.8 | 52.5 | 36.0 | 16.86 | 9.1 |
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