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The system from Huizhi holinds can form a high viscosity state similar to fracturing fluid gel after crosslinking in 10%-20% HCL. It has good fluid loss reduction, temperature and shear resistance, and good sand carrying capacity. In the acid fracturing transformation of carbonate reservoirs, it can reduce the acid rock reaction speed and acid fluid loss, and achieve the purpose of deep acid fracturing. The cross-linked acid sand-carrying fracturing technology combines the advantages of hydraulic fracturing and acid fracturing technology to form a new type of " acid etching-support composite fracture " to improve the reservoir seepage capacity. It is suitable for deep acid fracturing and acid sand-carrying fracturing operations in fractured high-temperature carbonate formations.
Main technical parameters:
| Testing Index | Technical Parameter |
| Acid viscosity ( room temperature )，mPa·s | ≥20 |
| Viscosity of crosslinked acid（90℃），mPa·s | ≥50 |
| Viscosity of gel breaking liquid（90℃），mPa·s | ≤15 |
| gel time，min | ≤5 |
| Reduce corrosion rate（90℃、10min）,% | ≥85 |
| Corrosion rate（90℃）,g/（m2·h） | ≤5 |
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