Super-Low Concentration Gel Fracturing Fluid

1. System Characterizations

This system dramatically improves the efficiency of thickener crosslinking performance through dramatic optimization of crosslink group’s structure so that the amount of use is largely cut (30% lower than conventional system). It reduces the damages to the formations but guarantees the proppant carrying capacity, so it satisfies the requirement of reservoir stimulation better.

2. Property Indices

Items	Product Indices
	60℃-80℃	80℃-100℃	100℃-120℃
Thickener concentration, %	0.15~0.20	0.20~0.25	0.25~0.30
Crosslinking time, s	90~180
Gel apparent viscosity, mPa.s	≥50
Matrix permeability damage ratio, %	≤20
Viscosity of broken gel, mPa.s	≤3.0
Surface tension, mN/m	≤28.0
Interface tension, mN/m	≤2.0
Residual content, mg/L	≤200
Emulsion breaking ratio, %	≥95
Friction reduction ratio, %	≥50
Compatibility	No precipitate; no flocculation

3. Application for Treatment

Make the fracturing based fluid according to the fracturing fluid design, and add PH controller after sufficient swelling, and then add crosslinker into the base fluid according to design to form the crosslinked fracturing gel, and then mix the fluid system with proppant in the blending unit according to pumping schedule for treatment execution.