Polyacrylamide microsphere deep profile control agent and preparation method and application thereof
A technology of polyacrylamide and displacement agent, applied in chemical instruments and methods, drilling compositions and other directions, can solve the problems of increased cost, large initial particle size, poor oil displacement effect, etc.
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Embodiment 1
[0052]Add 680g of white oil, 60g of SPAN80, 30g of oligoethylene oxide methacrylate polymer emulsifier, 7g of AEO9 into a 3L large beaker, and stir until completely mixed as an oil phase; add 360g of water into another container , 450g of acrylamide, 150g of dimethyl diallyl ammonium chloride, 0.3g of disodium edetate, 9g of isopropanol, 8g of urea, 1.5g of methylenebisacrylamide, stir to dissolve evenly, and adjust the pH Value = 8 as the nuclear water phase I; take a container and add 260g of water, 350g of acrylamide, 15g of acrylic acid, 0.2g of disodium edetate, 7g of isopropanol, 4g of urea, and 0.5g of methylenebisacrylamide, Stir to dissolve evenly, adjust pH=7 as shell water phase II; in addition, prepare 2% ammonium persulfate and 0.05% and 0.5% sodium bisulfite aqueous solutions respectively for later use. Turn on the emulsifier at 10,000 rpm, add all the nuclear water phase I into the large beaker storing the oil phase, shear and stir for 30 minutes until the emuls...
Embodiment 2
[0055] Add 650g solvent oil, 45g SPAN85, 30g polyisobutylene succinic anhydride ester polymer emulsifier, 7g AEO15 into a 3L large beaker, stir until completely mixed evenly as the oil phase; add 380g water, 430g acrylamide in another container , 150g of acryloyloxyethyltrimethylammonium chloride, 0.3g of disodium edetate, 10g of isopropanol, 7g of urea, 1.1g of methylenebisacrylamide, stir and dissolve evenly, and adjust the pH value to 8 As the nuclear water phase I; take a container and add 252g of water, 320g of acrylamide, 18g of 2-acrylamido-2-methylpropanesulfonic acid, 12g of styrene, 0.2g of disodium edetate, and 8g of isopropanol , urea 4g, methylenebisacrylamide 0.2g, divinylbenzene 1.1g, stir and dissolve evenly, adjust pH=8.5 as shell water phase II; in addition, prepare 2% ammonium persulfate and 0.04% sulfurous acid respectively Sodium hydrogen aqueous solution and 0.5% AIBA aqueous solution are used for later use. Turn on the emulsifier at 10,000 rpm, add all ...
Embodiment 3
[0058] Add 680g cyclohexane, 38g SPAN60, 32g styrene-maleic anhydride copolymer polymer emulsifier, 5g AEO9 in a 3L large beaker, stir until completely mixed as oil phase; add 400g water, 460g acrylamide, 160g methacryloyloxyethyltrimethylammonium chloride, 0.6g disodium edetate, 12g isopropanol, 7g urea, 3.1g methylenebisacrylamide, stir and dissolve evenly, Adjust the pH value to 7.5 as the nuclear water phase I; then take the container and add 246g of water, 330g of acrylamide, 10g of tert-butylacrylamide, 0.35g of disodium edetate, 4.2g of isopropanol, 4.2g of urea, and 0.52g of methyl bisacrylamide, 1.6g of polyethylene glycol diacrylate, stir and dissolve evenly, adjust pH=8.2 as shell water phase II; in addition, prepare 4% ammonium persulfate and 0.1% sodium bisulfite aqueous solution respectively , 1.0% AIBN ethanol solution for standby. Turn on the emulsifier at 10,000 rpm, add all the nuclear water phase I into the large beaker storing the oil phase, shear and stir...
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