Nano composite core-shell particle oil-displacing agent and preparation method and application thereof
A nano-composite, oil-displacing agent technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of large amount of surfactant used, increased oil recovery cost, large adsorption loss, etc., to improve temperature and resistance Salinity, reduce the cost of oil displacement, and reduce the effect of loss
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[0043] Example 1 Preparation of layered silicate loaded with oil displacement surfactant
[0044] a. The montmorillonite and water are mixed in a reaction kettle at a mass part of 1:20, and stirred at room temperature for 30 minutes to form a swelling system;
[0045] b. Raise the above swelling system to 80°C, add 20% cetyltrimethylammonium bromide based on the mass of montmorillonite, set the mixer frequency to 30Hz, and stir for 6h;
[0046] c. Based on the quality of montmorillonite, add 20% of 3-sulfopropyl hexadecyldimethyl betaine (industrial product) to the reaction system obtained above, and continue the reaction for 4 hours to obtain a loaded oil displacement surfactant Layered silicate slurry;
[0047] d. Perform suction filtration, drying, grinding, and sieving of the slurry to obtain layered silicate powder loaded with oil-displacing surfactant, which is ready for use.
[0048] The small-angle diffraction measurement of the prepared sample was carried out with the German B...
Example Embodiment
[0053] Example 2 Preparation of layered silicate loaded with oil displacement surfactant
[0054] a. The montmorillonite and water are mixed in a reaction kettle at a mass part of 1:20, and stirred at room temperature for 30 minutes to form a swelling system;
[0055] b. Raise the above swelling system to 80°C, add 20% cetyltrimethylammonium chloride based on the mass of montmorillonite, set the mixer frequency to 30Hz, and stir for 6h;
[0056] c. Based on the quality of montmorillonite, add 20% of 3-sulfopropyl hexadecyldimethyl betaine (industrial product) to the reaction system obtained above, and continue the reaction for 4 hours to obtain a loaded oil displacement surfactant Layered silicate slurry;
[0057] d. Perform suction filtration, drying, grinding, and sieving of the slurry to obtain layered silicate powder loaded with oil-displacing surfactant, which is ready for use.
[0058] After testing, the obtained layered silicate layer spacing with oil displacement surfactant is ...
Example Embodiment
[0059] Example 3 Preparation of layered silicate loaded with oil displacement surfactant
[0060] a. The kaolin and water are mixed in a reaction kettle at a mass part of 1:20, and stirred at room temperature for 30 minutes to form a swelling system;
[0061] b. Raise the above swelling system to 80°C, add 20% cetyltrimethylammonium bromide based on the mass of kaolin, set the mixer frequency to 30Hz, and stir for 8h;
[0062] c. Based on the quality of the kaolin, add 20% of 3-sulfopropylhexadecyldimethylbetaine (industrial product) to the reaction system obtained above, and continue the reaction for 6h to obtain a layered oil displacement surfactant loaded Silicate slurry
[0063] d. Perform suction filtration, drying, grinding, and sieving of the slurry to obtain layered silicate powder loaded with oil-displacing surfactant, which is ready for use.
[0064] After testing, the obtained layered silicate layer spacing with oil displacement surfactant is 2.17nm.
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