Table 8 Viscosity of fracturing fluid gel after being broken by several crosslinking agents.

From: Modified guanidine gel fracturing fluid system and performance optimization for ultra-deep and ultra-high temperature oil and gas reservoirs

GHPG concentration/%

Crosslinking agent type

Breaking temperature/ °C

Breaking time/hour

Crosslinking ratio

viscosity/mPa s ± 0.01

0.6

Borax

180

2

0.6

1.82

0.6

B-10

180

2

0.55

1.89

0.6

SL-10

180

2

0.55

1.98

0.6

GBA1-2

180

2

0.3

1.93

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