Research and application of high-viscosity friction reducer

In recent years, high-viscosity friction reducer (HVFR) has gradually replaced guar gum and its derivatives, becoming mainstream chemicals for fracturing fluid, and has gradually been applied in the field successfully. Based on this background, the development history, performance evaluation, strengthening and field application of HVFR are described in this paper. Compared with traditional fracturing fluids, the low-concentration HVFR has more stable drag-reduction performance, and it exhibits excellent sand-carrying performance, which poses lower damage to reservoirs, showing a great development potential.