It is suitable for the fracturing of unconventional tight oil/gas and shale oil/gas reservoirs. By introduction of a specially designed functional monomer into the molecular chain in a controlled manner, the degree of molecular curl is effectively inhibited. A fully water-soluble drag reducer product series is developed after breaking through the restrictions of oil-based emulsion products. It can adjust the reservoir wettability, and significantly reduce the damage of oil-water emulsion to the reservoir.

Advantage

• Strong viscosity-increase and low cost: compared to conventional products, the viscosity increases by 50-60% and the dosage decreases by 60%;
• Strong salt-resistance and good sand-carrying capacity: by introducing salt-resistant monomers and rigid groups, it has a mineralization resistance of 10ⅹ104mg/L, and a sand-carrying capacity retention rate of 90%;
• Low damage: Effectively overcoming reservoir damages such as water locking, emulsification, and hydration swelling caused by conventional drag reducing agents.