Associated type fracturing fluid resistant to high temperature and preparation method of associated type fracturing fluid
A fracturing fluid and associative technology, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problem of large damage to reservoir permeability, increased load of fracturing equipment, and poor shear resistance of jelly and other problems, to achieve the effect of improving sand-carrying performance, reducing damage, and low water-insoluble content
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[0065] The present invention also provides a method for preparing the above-mentioned high-temperature resistant associative fracturing fluid, comprising: S) adding 0.4 to 0.65 wt% of an associative polymer and 0.05 to 0.4 wt% of a composite synergist for fracturing fluid , 0.2-2wt% clay stabilizer, 0.3-0.5wt% high-temperature stabilizer, 0.01-0.15wt% gel breaker and the rest of the water are mixed to obtain a high-temperature resistant associative fracturing fluid;
[0066] Among them, the present invention has no special limitation on the sources of all raw materials, which can be commercially available. The associative polymer, composite synergist for fracturing fluid, clay stabilizer, high temperature stabilizer, gel breaker and water are all the same as above, and will not be repeated here.
[0067] According to the present invention, the step S) is specifically: mixing and stirring 0.4-0.65 wt% of the association polymer and the remaining water, and then adding 0.05-0.4 ...
Embodiment 1
[0074] Based on the fact that the hydrophobic monomer is sodium acrylamide alkyl sulfonate (the number of alkyl carbon atoms is 18, the mass ratio relative to acrylamide is 8%), and the temperature-resistant and salt-resistant monomer is AMPS (the mass ratio relative to acrylamide monomer is 8%) 5%) associative polymer thickener (the mass of hydrolysis unit is 25% of the mass of acrylamide monomer), compound synergist for fracturing fluid (10% polyether surfactant (G23, Sichuan Guangya Polymer Chemical Co., Ltd.), 20% ethanol, 70% water), clay stabilizer (quaternary ammonium salt clay stabilizer GAF-16, Sichuan Guangya Polymer Chemical Co., Ltd.), sodium thiosulfate high temperature stabilizer, using Qingshui has prepared high temperature resistant associative fracturing fluid.
[0075] According to Table 1, the method of preparing high-temperature-resistant associative fracturing fluid is as follows: use a measuring cylinder to measure 500ml of tap water, pour it into the agi...
Embodiment 2
[0080] Based on the fact that the hydrophobic monomer is sodium acrylamide alkyl sulfonate (the number of alkyl carbon atoms is 20, the mass ratio of acrylamide is 10%), and the temperature-resistant and salt-resistant monomer is AMPS (the mass ratio of acrylamide monomer is 10%) 10%) associative polymer thickener (the quality of the hydrolysis unit is 25% of the acrylamide monomer quality), synergist (20% polyoxyethylene ether surfactant (A-3, Sichuan Guangya Polymer Chemical Co., Ltd.), 10% ethanol, 70% water), clay stabilizer (quaternary ammonium salt clay stabilizer GAF-16, Sichuan Guangya Polymer Chemical Co., Ltd.), sodium thiosulfate high temperature stabilizer, using Qingshui has prepared high temperature resistant associative fracturing fluid.
[0081] According to Table 2, the method for preparing high-temperature-resistant associative fracturing fluid is as follows: measure 500ml of tap water with a measuring cylinder, pour it into the agitator, and adjust the speed...
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