Hydrolysis-resistant oil displacement polymer and preparation method thereof
A technology of hydrolysis resistance and polymer, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of poor temperature resistance and salt resistance, poor viscosity increasing effect, unsuitable use, etc., to achieve inhibition of hydrolysis, Effect of improving stability and ensuring chemical stability
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[0046] The preparation method of the hydrolysis-resistant oil displacement polymer of the present invention comprises the following steps:
[0047] Step 1: Weigh acrylamide, acrylamide-type monomers and hydrolysis-resistant monomers to form an aqueous solution, and use alkali to adjust the pH of the aqueous solution to 6-12; the alkali is sodium hydroxide or sodium carbonate; for example: pH It can start from 6, and every interval of 1 is an embodiment;
[0048] The acrylamide monomer is at least one of the following polymerizable monomers, and when two or more are selected, the ratio is arbitrary: 2-acrylamide-2-methylpropanesulfonic acid, acrylic acid, N- Vinylpyrrolidone (NVP) and N,N-dimethylacrylamide;
[0049] The total mass concentration of the above-mentioned acrylamide, acrylamide monomer and hydrolysis-resistant monomer in the aqueous solution is 10% to 40%, for example: the total mass concentration can start from 10%, and every interval of 1% is an example; accordi...
Embodiment 1
[0060] Add 6.0g of acrylamide, 3.5g of 2-acrylamido-2-methylpropanesulfonic acid and 0.5g of hydrolysis-resistant monomer (n=2) into the polymerization reaction bottle, add 23.0g of deionized water to dissolve, and then add hydrogen Sodium oxide was used to adjust the pH to 7.0, and then 1.0 g of 1% EDTA-2Na aqueous solution and 0.5 g of 1% urea aqueous solution were added successively,
[0061] Put the polymerization reaction bottle in a constant temperature water bath, blow nitrogen to drive oxygen for 30 minutes, then add 1.0 g of 0.1% potassium persulfate aqueous solution and 1.0 g of 0.1% potassium bisulfite aqueous solution, initiate the reaction at 5°C, and continue to pass nitrogen Stopped after five minutes, and after 2 hours of polymerization reaction, the temperature was raised to 50° C. to continue the reaction for 3 hours to obtain rubber blocks. The rubber block is taken out, cut, granulated, pulverized, and sieved to obtain a white hydrolysis-resistant polymer f...
Embodiment 2
[0064] Add 5.0g of acrylamide, 4.9g of 2-acrylamido-2-methylpropanesulfonic acid and 0.1g of hydrolysis-resistant monomer (n=4) into the polymerization reaction bottle, add 23.0g of deionized water to dissolve, and then add hydrogen Sodium oxide was used to adjust the pH to 8.0, and then 1.0 g of 1% EDTA-2Na aqueous solution and 1.0 g of 1% urea aqueous solution were added successively,
[0065] Put the polymerization reaction bottle in a constant temperature water bath, and after blowing nitrogen to drive oxygen for 30 minutes, add 2.0 g of 0.1% ammonium persulfate aqueous solution and 2.0 g of 0.1% potassium bisulfite aqueous solution, initiate the reaction at 5°C, and continue to pass nitrogen for five After 2 minutes, stop, and after 2 hours of polymerization reaction, the temperature was raised to 50° C. and the reaction was continued for 4 hours to obtain rubber blocks. The rubber block is taken out, cut, granulated, pulverized, and sieved to obtain a white hydrolysis-re...
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