Preparation of a novel polymer suspensions with high stabilization, and their superior performances in high salinity

Amphoteric polymerhave attracted immense research interest in hydraulic fracturing.However, current fracturing fluids prepared using conventional suspensions have poor stability and cannot be adapted to field applications in highly mineralized oilfield blocks, and they cannot reuse highly mineralized oilfield wastewater. To solve the above problems, a new concentrated suspension was prepared as a fracturing fluid thickener. The crystal layer spacing of SMB-2 exhibited an improved value of d = 13.564 nm. Experimental findings indicate that SRS-2 exhibited rapid thickening in saline water within a 5-minute timeframe. The viscosity of SRS-2 in high-salinity solutions demonstrated an impressive viscosity retention rate of 96.8 %, highlighting its excellent salt resistance properties. The zeta potential was measured at -62.13 mV. Notably, there was no significant settlement observed even after 30 days, with a settling velocity of 9.2592 × 10−3 mm/s, underscoring its superior stability performance. Therefore, this new suspension thickener has good potential for applications as an alternative material in multiple fields, such as oil extraction and sewage treatment.