Polymer microspheres for high temperature hypersalinity reservoir deep profile control and preparation method thereof
A technology for high salinity and deep profile control, applied in the direction of drilling composition, chemical instruments and methods, etc., can solve problems such as poor stability and reliability, rapid rise of water cut in oil wells, reservoir heterogeneity, etc. Achieve the effect of high production efficiency, improvement effect and low energy consumption
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Embodiment 1
[0023] (1) Preparation of aqueous solution: dissolve 18% of water-soluble anionic monomer into 10% of deionized water, add 3% of dispersant and stir, then add 25% of 3-acrylamido-3-methylbutyrate sodium Fully stir until the solution is clear and free of solid insoluble matter, add 2.5% cross-linking agent, and stir for 1 to 2 hours;
[0024] (2) Emulsion system preparation: Dissolve 15% surfactant in 20% solvent, after fully dissolving evenly, gradually add the aqueous solution in step (1), stir well, and obtain transparent or translucent emulsion polymerization reaction system;
[0025] (3) Photopolymerization: 1.5% photoinitiator is added to the emulsion system of step (2), after stirring evenly, an inert gas is passed into the reaction kettle to replace the oxygen in the reaction system, so that the emulsion system is deoxidized Under the conditions, the metering pump is used to introduce the emulsion into the pipeline with the ultraviolet light device at a constant speed,...
Embodiment 2
[0028] (1) Aqueous solution preparation: dissolve 10% water-soluble anionic monomer into 12% deionized water, add 2.5% dispersant and stir, then add 33% 2-acrylamido-2-methylpropanesulfonic acid Stir well with the acrylamide monomer mixture until the solution is clear and free of solid insolubles, add 0.25% crosslinking agent, and stir for 1 to 2 hours;
[0029] (2) Emulsion system preparation: Dissolve 10% surfactant in 22% solvent, after fully dissolving evenly, gradually add the aqueous solution in step (1) and stir fully to obtain transparent or translucent emulsion polymerization reaction system;
[0030] (3) Photopolymerization reaction: 2% photoinitiator is added in the emulsion system of step (2), after stirring evenly, inert gas is passed into the reactor to replace the oxygen in the reaction system, so that the emulsion system is deoxidized Under the conditions, the metering pump is used to introduce the emulsion into the pipeline with the ultraviolet light device at ...
Embodiment 3
[0033] (1) Preparation of aqueous solution: Dissolve 15% of water-soluble anionic monomer into 9% of deionized water, add 1% of dispersant and stir, then add 27% of acrylamide monomer and stir until the solution is clear and free of solid insolubles , add 2% cross-linking agent and stir for 1-2 hours;
[0034] (2) Emulsion system preparation: Dissolve 20% surfactant in 27% solvent, after fully dissolving evenly, gradually add the aqueous solution of step (1), stir well, and obtain transparent or translucent emulsion polymerization reaction system;
[0035] (3) Photopolymerization reaction: Add 1% photoinitiator to the emulsion system of step (2), after stirring evenly, pass inert gas in the reaction kettle to replace the oxygen in the reaction system, so that the emulsion system is in deoxidation Under the conditions, the metering pump is used to introduce the emulsion into the pipeline with the ultraviolet light device at a constant speed, so that it can fully react through ...
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