Research Article
Copolymer SJ-1 as a Fluid Loss Additive for Drilling Fluid with High Content of Salt and Calcium
Table 3
Performance evaluation of salt resistance of drilling fluid at high temperature.
| Experimental conditions | NaCl concentration /wt% | AV /mPa·s | PV /mPa·s | YP /Pa | API filter loss /mL |
| Aging temperature 120°C, aging time 16 h | 0.0 | 32.0 | 27.5 | 4.60 | 10.6 | 2.0 | 20.0 | 17.5 | 2.56 | 16.0 | 5.0 | 17.5 | 15.0 | 2.56 | 13.0 | 10.0 | 18.0 | 16.0 | 2.04 | 12.6 | 15.0 | 17.0 | 15.0 | 2.04 | 12.6 | 20.0 | 17.0 | 15.0 | 2.04 | 12.6 | 25.0 | 17.5 | 15.0 | 2.56 | 10.4 | 30.0 | 19.5 | 18.0 | 1.53 | 7.5 |
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