Water-based fracturing fluid used for continental face shale gas fracturing and preparation method thereof
A continental shale, water-based technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of high cost and poor economic benefits, and achieve strong sterilization ability, good compatibility, surface interface low tension effect
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[0039] The present invention also relates to a method for preparing a water-based fracturing fluid for continental shale gas fracturing, which specifically includes the following steps:
[0040] 1) Measure water according to the ratio of the water-based fracturing fluid formula for continental shale gas fracturing of the present invention;
[0041] 2) Add 0.02-0.1% mass percentage of high molecular polymer and stir for 40 minutes;
[0042] 3) Add 2-3% by mass of clay stabilizer and stir for 10-15 minutes; add 0.1-0.3% by mass of fungicide and 0.3-0.5% by mass of drainage aid in the stirring state, and stir for 15 minutes Fully dissolved.
Embodiment 1
[0044] Prepare 50m 3 Fracturing fluid, the preparation method is: take 48.79 m 3 Water, add 10 kg of anionic polyacrylamide with a molecular weight of 1000, stir for 40 minutes, then add 1 ton of potassium chloride while stirring, and the industrial grade potassium chloride requires K 2 O ≥ 62.0%, water insoluble content ≤ 2.0%, stir for 15 minutes to completely dissolve potassium chloride, then add 50 kg of glutaraldehyde and 150 kg of drainage aid in turn, stir for 15 minutes to fully dissolve and prepare the shale gas pressure Fracturing water-based fracturing fluid. The drainage aid is a mixed solution of alkyl polyglycoside and SR18Y fluorocarbon surfactant; the mixed solution includes alkyl polyglycoside, SR18Y, ethanol and water; wherein, the mass percentage of each component is: alkyl polyglycoside is 5%, SR18Y 4%, ethanol 10%, water 81%, the preparation method can be mixed directly.
Embodiment 2
[0046] Prepare 50m 3 Fracturing fluid, the preparation method is: take 48.77m 3 Water, add 20 kg of anionic polyacrylamide with a molecular weight of 1000, stir for 40 minutes, then add 1 ton of potassium chloride while stirring, stir for 15 minutes to completely dissolve potassium chloride, then add 50 kg of glutaraldehyde, 150 kg of Drainage aid, stir for 15 minutes to fully dissolve and prepare the water-based fracturing fluid for shale gas fracturing. The drainage aid is a mixed solution of alkyl polyglycoside and SR18Y fluorocarbon surfactant; the mixed solution includes alkyl polyglycoside, SR18Y, ethanol and water; wherein, the mass percentage of each component is: alkyl polyglycoside is 5%, SR18Y 4%, ethanol 10%, water 81%, the preparation method can be mixed directly.
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