Acid carboxymethyl guargum fracturing fluid and preparation method thereof
A technology of carboxymethyl guar gum and carboxymethyl guar gum powder, which is applied in the field of oil field fracturing, can solve the problems of formation permeation and filtration reduction, and achieve the effects of easy operation, simple preparation process, and good fluid loss reduction performance
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Embodiment 1
[0034] Embodiment 1, this acidic carboxymethyl guar gum fracturing fluid is made up of following raw material mass percentage: carboxymethyl guar gum powder 0.3% to 0.8%, aid drainage agent 0.2% to 1%, antiswelling agent 0.5% to 3%, bactericide 0.01% to 0.1%, demulsifier 0.15% to 1%, acidic crosslinking agent 0.5% to 1.2%, crosslinking time delay agent 0.2% to 1.2%, gel breaker 0.04% to 5%, and the rest amount of water.
Embodiment 2
[0035] Example 2 differs from Example 1 in that: the acidic crosslinking agent in Example 2 is HTC acidic crosslinking agent, and the optimal dosage is 0.5% to 0.7%.
Embodiment 3
[0036] Embodiment 3 differs from Embodiments 1 to 2 in that the gel breaker in Embodiment 3 is sodium persulfate or potassium persulfate, and the optimal dosage is 0.1% to 4%.
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