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Sulfonate lycine type hydrophobic associated polymer and preparation method thereof

A technology of hydrophobic association and betaine, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems that the heat and salt resistance of hydrophobic association polymers needs to be improved, and achieve enhanced oil recovery, Broad market prospects, improve the effect of viscosity increase

Active Publication Date: 2017-08-08
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for high-temperature and high-salinity oil reservoirs, the temperature and salt resistance of hydrophobic association polymers still need to be improved

Method used

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  • Sulfonate lycine type hydrophobic associated polymer and preparation method thereof
  • Sulfonate lycine type hydrophobic associated polymer and preparation method thereof
  • Sulfonate lycine type hydrophobic associated polymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh acrylamide (10g) and acrylic acid (2.5g), add distilled water and stir evenly, and adjust the pH value to 7; then add 3-(methacrylamidopropyldimethylamino)propanesulfonate (0.1g), N -Phenylethyl-N-dodecylmethacrylamide (0.1g) and sodium lauryl sulfate (0.3g), then add a certain amount of distilled water to make the total mass of the solution reach 50g, stir until the solution is clear; Nitrogen for 15 minutes to remove dissolved oxygen in water; add initiator v50 (0.1-0.2 wt% of the total mass of the monomer), place it under a photoinitiator, and react for 3 hours.

Embodiment 2

[0031] Weigh acrylamide (10g), acrylic acid (2.5g), add distilled water and stir evenly, adjust the pH value to 7; add 3-(methacrylamidopropyldimethylamino)propanesulfonic acid (0.1g), N-benzyl Base-N-dodecylmethacrylamide (0.1g) and sodium lauryl sulfate (0.3g), then add a certain amount of distilled water to make the solution quality reach 50g, stir until the solution is clear; Nitrogen gas for 15 minutes, Remove the dissolved oxygen in the water; add initiator v50 (0.1-0.2wt% of the total mass of the monomer), place it under a photoinitiator, and react for 3h.

[0032] 2. Structural characterization of sulfonate betaine-type hydrophobic association polymers

[0033] figure 1 It is the infrared spectrogram of the polymer synthesized in Example 1.

[0034] As you can see from the picture: 3408cm -1 The characteristic absorption peak of primary amide N-H stretching vibration is at 2981cm -1 and 2897cm -1 The characteristic absorption peaks of methylene antisymmetric stret...

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Abstract

The invention discloses a sulfonate lycine type hydrophobic associated polymer and a preparation method thereof. A preparation process of the sulfonate lycine type hydrophobic associated polymer comprises the following steps that firstly, acrylamide and acrylic acid are mixed in an aqueous solution, and the pH of a system is regulated to be around 6 to 8; secondly, 3-(dimethylamino propyl methacrylamide)propanesulfonate, N-aryl-N-alkyl(methyl)acrylamide and lauryl sodium sulfate are added and stirred until the solution is clear; and thirdly, after nitrogen is led in for deoxidization, a photoinitiator azobis(isobutylamidine hydrochloride) is added for polymerization under photoinitiation conditions. Since advantages of a double-tail hydrophobic associated polymer and advantages of a lycine type polymer are combined, the viscosifying capability, the temperature endurance, the salt resistance and the hydrolysis resistance of the sulfonate lycine type hydrophobic associated polymer are remarkably improved, the sulfonate lycine type hydrophobic associated polymer can be used for an oil-displacing agent or an acidizing and fracturing thickener used for increasing a crude oil recovery rate in oilfield development, and the preparation method of the sulfonate lycine type hydrophobic associated polymer has the advantages of reliable principle, easiness in operation and wide market prospect.

Description

technical field [0001] The invention relates to a sulfonate betaine type hydrophobic association polymer used for oil field enhanced recovery and acid fracturing and a preparation method thereof. Background technique [0002] The hydrophobic association polymer introduces a small amount of hydrophobic groups into the molecular chain of the copolymer, so that the solution has high-efficiency viscosity-increasing, excellent salt resistance, good temperature resistance and shear resistance, and is used in oilfields to enhance oil recovery. Rate and acid fracturing are widely used. However, for high temperature and high salinity reservoirs, the heat and salt resistance of hydrophobic association polymers still needs to be improved. [0003] Double-tailed hydrophobic monomer containing long-chain alkyl and benzene ring (Wu Xiaoyan et al. A double-tailed hydrophobic associative acrylamide copolymer with surface activity. Guangdong Chemical Industry, 2014, 41(22): 42-44; Pu Wanfen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/06C08F220/60C08F220/54C08F2/48C09K8/588C09K8/68C09K8/88
CPCC08F2/48C08F220/56C09K8/588C09K8/68C09K8/882C08F220/06C08F220/606C08F220/54C08K5/29C08F220/585C08F220/603
Inventor 李勇明任强赵金洲江有适
Owner SOUTHWEST PETROLEUM UNIV
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