Intelligent nano oil-displacing agent as well as preparation method and application thereof
A kind of oil displacement agent and nano technology, which is applied in the direction of chemical instruments and methods, earth square drilling, production fluid, etc., can solve the problems that montmorillonite does not have interface activity, reduce work efficiency, etc., achieve obvious emulsification effect and increase oil recovery rate , highly active effect
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Embodiment 1
[0052] 1) Put the purchased hydrophobic nano-montmorillonite into a beaker, add water, and prepare a solution I with a hydrophobic nano-montmorillonite concentration of 10000 ppm;
[0053] 2) Heating deionized water in a water bath, and after the temperature reaches 30°C, weigh a certain mass of dodecyltrimethylammonium bromide and add it into deionized water, dissolve to obtain solution II;
[0054]3) After the dissolving of dodecyltrimethylammonium bromide, cetyl hydroxysulfobetaine is added to solution II, and it is mixed evenly by stirring to obtain solution III, in which dodecyl The concentration of trimethylammonium bromide is 100ppm, and the concentration of cetyl hydroxysulfobetaine is 100ppm;
[0055] 4) Place 100mL of solution I in an oil bath pre-heated to 80°C, stir for 30 minutes, and then add 15mL of solution III by dropwise addition at a rate of 1d / 5s. After the dropwise addition, continue to maintain the temperature at 80°C °C for 8 hours to obtain an intellig...
Embodiment 2
[0057] 1) Put the purchased hydrophobic nano-montmorillonite into a beaker, add water, and prepare a solution I with a hydrophobic nano-montmorillonite concentration of 5000ppm;
[0058] 2) Heating deionized water in a water bath, and after the temperature reaches 50°C, weigh a certain mass of dodecyltrimethylammonium bromide and add it into deionized water, dissolve to obtain solution II;
[0059] 3) After the dissolving of dodecyltrimethylammonium bromide, cetyl hydroxysulfobetaine is added to solution II, and it is mixed evenly by stirring to obtain solution III, in which dodecyl The concentration of trimethylammonium bromide is 300ppm, and the concentration of cetyl hydroxysulfobetaine is 600ppm;
[0060] 4) Place 100mL of solution I in an oil bath pre-heated to 50°C, stir for 30min, then add 15mL of solution III by dropwise addition at a rate of 1d / 5s. After the dropwise addition, continue to maintain the temperature at 50°C °C for 8 hours to obtain an intelligent nano o...
Embodiment 3
[0062] 1) Put the purchased hydrophobic nano-montmorillonite into a beaker, add water, and prepare a solution I with a hydrophobic nano-montmorillonite concentration of 10000 ppm;
[0063] 2) Heating deionized water in a water bath, and after the temperature reaches 30°C, weigh a certain mass of dodecyltrimethylammonium bromide and add it to deionized water, dissolve to obtain solution II;
[0064] 3) After the dissolving of dodecyltrimethylammonium bromide, cetyl hydroxysulfobetaine is added to solution II, and it is mixed evenly by stirring to obtain solution III, in which dodecyl Trimethylammonium bromide concentration is 1000ppm, cetyl sulfobetaine concentration is 1000ppm;
[0065] 4) Place 100mL of solution I in an oil bath pre-heated to 80°C, stir for 30 minutes, and then add 15mL of solution III by dropwise addition at a rate of 1d / 5s. After the dropwise addition, continue to maintain the temperature at 80°C °C for 8 hours to obtain an intelligent nano oil displacemen...
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