Temperature-resistant salt-resistant viscoelastic polymer gel microsphere, profile control and flooding agent, and preparation methods and applications thereof
A technology of gel microspheres and water-soluble polymers, applied in chemical instruments and methods, drilling compositions, etc., can solve the problem of insufficient blocking ability, high salinity microsphere expansion performance, and limited pore blocking ability And other issues
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Embodiment 1
[0037] First add 960g of 5# white oil, 240g of SPAN60, and 80g of TWEEN60 into the reaction kettle, stir until completely mixed and uniform as the oil phase, control the temperature in the kettle to 20°C, and the stirring speed to 360rpm. Add 280g of water, 400g of acrylamide, 40g of acryloyloxyethyltrimethylammonium chloride, 13g of sodium acetate, 0.3g of disodium edetate, 10g of isopropanol, and 1.5 g of methylenebisacrylamide into the container. g, stir and dissolve evenly as the water phase I, take another container, add 250g water, 300g acrylamide, 80g 2-acrylamido-2-methylpropanesulfonate sodium, 2-acrylamidotetradecyl sodium sulfonate 4g , 12 g of sodium acetate, 0.3 g of disodium edetate, and 10.0 g of isopropanol were stirred and dissolved evenly as the water phase II; 0.32 g of ammonium persulfate and 0.25 g of sodium bisulfite were dissolved in 10 g of water for later use. Add the water phase I into the oil phase in the reactor, stir until the emulsification is uni...
Embodiment 2
[0040]First add 1000g cyclohexane, 240g SPAN80, 70g TWEEN80 into the reaction kettle, stir until completely mixed, as the oil phase I, control the temperature in the kettle to 22°C, and the stirring speed to 360rpm; 2 g of azobisisobutyronitrile was dissolved in 29 g of ethyl acetate as oil phase II. The temperature in the kettle was controlled to be 20° C., and the stirring speed was 360 rpm. Add 300g of water, 350g of acrylamide, 20g of tert-butylacrylamide, 15g of sodium acetate, 0.4g of disodium ethylenediaminetetraacetate, 13g of isopropanol, and 1.4g of methylenebisacrylamide into the container, stir and dissolve evenly as Water phase I, take another container, add 300g water, 300g acrylamide, 100g sodium 2-acrylamido-2-methylpropanesulfonate, 15g sodium acetate, 0.4g disodium edetate, 12.0 isopropanol g, stirred and dissolved evenly as the water phase II; 0.35 g of ammonium persulfate and 0.28 g of sodium bisulfite were dissolved in 10 g of water for later use. Add th...
Embodiment 3
[0043] First add 1000g of liquid paraffin and 300g of AEO-3 into the reaction kettle, stir until completely mixed evenly, as oil phase I, control the temperature in the kettle to 25°C, and the stirring speed to 360rpm; in addition, add 5g of stearyl methacrylate and 5g of Azodiisovaleronitrile was dissolved in 25 g of ethyl acetate as oil phase II. Add 300g of water, 300g of acrylamide, 40g of N-vinylpyrrolidone, 30g of methacryloxyethyltrimethylammonium chloride, 23g of sodium acetate, 0.5g of disodium edetate, and 14g of n-hexanol into the container , 1.8g of methylenebisacrylamide, stir and dissolve evenly as the water phase I, take another container, add 300g of water, 300g of acrylamide, 120g of sodium 2-acrylamido-2-methylpropanesulfonate, and 14g of sodium acetate, Disodium edetate 0.6g, n-hexanol 14g, polyethylene glycol diacrylate 1.8g, stir and dissolve evenly as water phase II; dissolve 0.8g ammonium persulfate and 0.6g sodium bisulfite in 10g water for later use ....
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