The viscoelastic surfactant fracturing fluid satisfies proppant carrying capacity requirement by thickening the fluid system with wormlike micelle formed by surfactant molecule. Since it excludes polymer and owns the features of environment friendly and good compatibility, gel breaking can be realized by oil-phase but not by gel breaker. Additionally no residuals or damages to the formations is also the advantage of this system.
|
Items |
Product Indices |
|
Crosslinking time, s |
30~300 |
|
Temperature tolerance，℃ |
≤150 |
|
Gel apparent viscosity, mPa.s |
≥50 |
|
Fracturing fluid density，g/cm3 |
≤20 |
|
Matrix permeability damage ratio, % |
≤5.0 |
|
Viscosity of broken gel, mPa.s |
≤28.0 |
|
Surface tension, mN/m |
≤2.0 |
|
Interface tension, mN/m |
≤100 |
|
Friction reduction ratio, % |
≥50 |
|
Compatibility |
No precipitate; no flocculation |
3. Application for Treatment
A: Make the base fluid of 0.5-1.0% KCL concentration and add the surfactant referred as this product with 2.0-5.0% concentration into the blending unit when the base fluid is pumped.
B: Make surfactant solution and brine of 1.0-3.0 concentration KCL separately, and then pump the fluid into the blending unit according to a certain portion to make the fracturing gel.
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