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 conditionsNaCl concentration
/wt%
AV
/mPa·s
PV
/mPa·s
YP
/Pa
API filter loss
/mL

Aging temperature 120°C, aging time 16 h0.032.027.54.6010.6
2.020.017.52.5616.0
5.017.515.02.5613.0
10.018.016.02.0412.6
15.017.015.02.0412.6
20.017.015.02.0412.6
25.017.515.02.5610.4
30.019.518.01.537.5