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

0.012.57.05.6223.0
0.116.010.06.1311.8
0.319.513.06.6411.2
0.623.516.07.6710.4
0.930.021.09.209.4
1.237.026.011.249.2
1.544.031.013.299.2
1.852.536.016.869.1