A high salt tolerance and low adsorption drag reducer based on non-covalent enhancement

MA Yingxian,ZHU Zhi,GUO Jianchun,ZHOU Han,LI Jia,XIONG Yujia,MA Leyao

Table 4 The effects of salinity and ion types on the viscosity of 0.10% inverse-emulsion drag reducer solutions.

Type of ion Salinity/(mg·L-1) Apparent viscosity/(mPa·s) Na+ 0 2.09 500 1.68 1 000 1.22 2 000 1.06 5 000 0.95 10 000 0.93 Ca2+ 0 2.04 50 1.56 100 1.27 200 0.92 500 0.88 1 000 0.84