Temperature-resistant and salt-resistant low-tension nanometer microsphere regulating and displacing agent and preparation method thereof
A temperature-resistant, salt-resistant, nano-microsphere technology, applied in chemical instruments and methods, earthwork drilling, wellbore/well components, etc., can solve problems such as reducing costs, reducing the amount of common emulsifiers, and reducing the ability of oil-water interface, etc. Achieve the effects of cost reduction, high extractable solids content, and ultra-low plugging performance
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Embodiment 1
[0039] First add 1200g of white oil, 150g of SPAN80, 120g of coconut acid monoethanolamide, 50g of tetradecyl polyoxyethylene ether sulfobetaine (the HLB of the emulsifier system is about 6.8) into the reaction kettle, and stir until completely mixed , the temperature in the kettle was controlled to be 28° C., and the stirring speed was maintained at 400 rpm. In another container, add 670g of water, 850g of acrylamide, 200g of sodium 2-acrylamido-2-methylpropanesulfonate, 4g of sodium 2-acrylamidotetradecylsulfonate, 40g of sodium acetate, ethylenediamine Disodium tetraacetate 0.8g, urea 12g, isopropanol 25g, methylene bisacrylamide 2.5g, stirred and dissolved evenly as the water phase; 1.6g of ammonium persulfate and 1.2g of sodium bisulfite were dissolved in 20g of water for later use . Add 700g of water phase to the oil phase in the reaction kettle, stir for several minutes until emulsified evenly, add all the oxidizing agent aqueous solution after 10 minutes of nitrogen g...
Embodiment 2
[0042] First add 1200g cyclohexane, 120g SPAN80, 120g oleic acid monoethanolamide, 100g palmitic acid polyoxyethylene ether (EO number=3) sodium sulfonate (emulsifier system HLB is about 6.6) in the reaction kettle, stir until Mix completely and uniformly, as the oil phase I, control the temperature in the kettle to 20°C, and the stirring speed to 400rpm; in addition, dissolve 5g of N-phenylmaleimide and 6g of azobisisobutyronitrile in 29g of ethyl acetate, as oil phase II. In another container, add 670g of water, 900g of acrylamide, 150g of sodium 2-acrylamido-2-methylpropanesulfonate, 35g of sodium acetate, 0.8g of disodium edetate, 10g of urea, and 30g of n-butanol, 2.5g of methylenebisacrylamide was stirred and dissolved evenly as the water phase; 1.4g of ammonium persulfate and 1.2g of sodium bisulfite were dissolved in 20g of water respectively for later use. Add 700g of water phase and 16g of oil phase II to the oil phase in the reaction kettle, stir for several minute...
Embodiment 3
[0045]First add 1200g of liquid paraffin, 200g of SP85, 70g of cocoic acid monoalcoholamide, 50g of N,N-dicetanoylhexamethylene diamine dipropionic acid dipolyoxyethylene ether (EO number = 3) dicarboxylate in the reaction kettle (The HLB of the emulsifier system is about 7.2), stir until it is completely mixed evenly, as the oil phase I, the temperature in the kettle is controlled at 25°C, and the stirring speed is 400rpm; The nitrile was dissolved in 28 g of ethyl acetate as oil phase II. In another container, add 670g of water, 800g of acrylamide, 120g of sodium 2-acrylamido-2-methylpropanesulfonate, 80g of N-vinylpyrrolidone, 45g of sodium acetate, and 1.2g of disodium edetate, 12g of urea, 30g of n-hexanol, and 2.8g of polyethylene glycol diacrylate were stirred and dissolved evenly as the water phase; 1.3g of ammonium persulfate and 1.1g of sodium bisulfite were dissolved in 20g of water for later use. Add 700g of water phase and 16g of oil phase II to the oil phase in ...
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