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 conditionsAV
/mPa·s
PV
/mPa·s
YP
/Pa
API filter loss
/mL

120°C, 16 h43.534.59.2010.6
140°C, 16 h38.532.06.6410.6
160°C, 16 h20.817.03.8311.5
180°C, 16 h13.09.53.5812.1
200°C, 16 h13.011.02.0412.5
220°C, 16 h12.511.01.5313.0