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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[0034] In Example 1, the acidic carboxymethyl guar gum fracturing fluid is composed of the following raw material mass percentages: carboxymethyl guar gum powder 0.3% to 0.8%, drainage aid 0.2% to 1%, anti-swelling 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%, the remaining Amount of water.
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[0035] The difference between Example 2 and Example 1 is that the acidic crosslinking agent of Example 2 is an HTC acidic crosslinking agent, and the optimal amount is 0.5% to 0.7%.
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[0036] Example 3 is different from Examples 1 to 2 in that: the breaker of Example 3 is sodium persulfate or potassium persulfate, and the optimal amount is 0.1% to 4%.
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