A kind of active polymer for polymer gel plugging agent and its preparation method and application
A technology of active polymer and polymer gel, which is applied in the field of drilling fluid plugging, to achieve the effects of increased molecular weight, excellent high temperature resistance, and excellent polycondensation and crosslinking functions
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preparation example 1
[0053] A preparation method of an organic polymer crosslinking agent, comprising steps as follows:
[0054] (1) 6g of acrylamide monomer was dissolved in 5mL of deoxygenated deionized water to obtain solution D1, and 0.06g of ammonium persulfate was dissolved in 2mL of deoxygenated deionized water to obtain solution D2;
[0055] (2) 6g lipophilic emulsifier Span60 / Span80 mixture (Span60 and Span80 mass ratio 0.4:1), 14g hydrophilic emulsifier Tween60 / Tween80 mixture (Tween60 and Tween80 mass ratio 2:1) were stirred with 63mL cyclohexane Evenly, solution E is obtained;
[0056] (3) Slowly add solutions D1 and D2 successively to solution E, stir evenly, and after standing at 60°C for 6 hours, add 2g of N-methylolacrylamide to obtain microemulsion F, and use a mass fraction of 10 % hydrochloric acid solution to adjust the pH value of the system to 5.5 to obtain microemulsion G;
[0057] (4) Add 50 mL of absolute ethanol to the microemulsion G to precipitate solid phase substanc...
Embodiment 1
[0060] A kind of preparation method of active polymer for polymer gel plugging agent, comprises steps as follows:
[0061] (1) Mix 0.12g lipophilic emulsifier Span60 / Span80 mixture (Span60 and Span80 mass ratio 0.4:1), 0.06g hydrophilic emulsifier Tween60 / Tween80 mixture (Tween60 / Tween80 mass ratio 2:1) and 7.1g ring The hexane was stirred evenly, and then 0.7g of α-methylstyrene was slowly added dropwise to the system, and stirred evenly to obtain solution A;
[0062] (2) Add 7g of acrylamide monomer and 0.8g of N-methylolacrylamide into 55g of deoxygenated deionized water, stir until completely dissolved, then add 0.005g of ethylenediaminetetraacetic acid, stir until completely dissolved, and obtain a solution B;
[0063] (3) Use a dropping funnel to slowly drop solution A into solution B, continue to stir evenly, raise the temperature to 50°C, add 0.35g ethylenediamine and 0.08g ammonium persulfate in sequence, and continue stirring for 8 hours to obtain a microemulsion C...
Embodiment 2
[0067] A kind of preparation method of active polymer for polymer gel plugging agent, comprises steps as follows:
[0068] (1) 0.06g lipophilic emulsifier Span60 / Span80 mixture (Span60 and Span80 mass ratio 0.4:1), 0.03g hydrophilic emulsifier Tween60 / Tween80 mixture (Tween60 / Tween80 mass ratio 2:1) and 7.3g ring The hexane was stirred evenly, and then 0.5g of α-methylstyrene was slowly added dropwise to the system, and stirred evenly to obtain solution A;
[0069] (2) Add 5g of acrylamide monomer and 0.6g of N-methylolacrylamide into 58g of deoxygenated deionized water, stir until completely dissolved, then add 0.004g of ethylenediaminetetraacetic acid, stir until completely dissolved, and obtain a solution B;
[0070] (3) Use a dropping funnel to slowly drop solution A into solution B, continue to stir evenly, raise the temperature to 50°C, add 0.25g ethylenediamine and 0.02g ammonium persulfate in sequence, and continue stirring for 8 hours to obtain a microemulsion C;
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