The clean fracturing fluid system is mainly used for shale oil and gas, tight oil and gas fracturing, including slick water and active gel liquid system. Among them, the slick water in the pre-stage has low viscosity, strong penetration ability, enters the branch fracture, broadens the overall bandwidth, and the net pressure in the fracture is uniform, which can form a more complex volume mesh fracture. The gel thickener is a low molecular hydrophobic associating polymer with high cross-linking viscosity, high net pressure during injection, strong fracture-making ability, which is conducive to increasing fracture width. It is suitable for pumping when high sand ratio, high pressure and difficult fracture opening.

The system has excellent performance parameters, almost no residue after pressing, and minimal damage to the reservoir. It has the advantages of stable performance, strong adaptability, adjustable viscosity, temperature and shear resistance, low friction, easy backflow, and simple liquid preparation. The viscoelasticity of polymer is beneficial to improve the sand carrying performance, and has good application effect on large-scale fracturing of shale oil and gas reservoirs, tight oil and gas reservoirs, coalbed methane reservoirs and conventional oil and gas reservoirs.

(1)Stable performance, long storage time ( up to 15 days ) ;

(2)Strong adaptability, low requirement for water quality standard of liquid preparation ;

(3)The viscosity is adjustable, 3~125mPa·s;

(4)Low friction, field application test rent reduction rate of more than 70%;

(5)Good sand carrying performance and good viscoelasticity;

(6)Temperature and shear resistance, viscosity with self-recovery function;

(7)Clean low damage, less damage to the reservoir debris;

(8)Easy to flow back, quick gel breaking after pressing;

(8)The liquid preparation is simple, the gelation is fast, and it is suitable for online mixing.

Main technical parameters: