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A kind of sulfonate betaine type hydrophobic association polymer and preparation method thereof

A hydrophobic association and polymer technology, which is applied in drilling compositions, chemical instruments and methods, etc., can solve the problems such as the need to improve the temperature and salt resistance of hydrophobic association polymers, and achieve enhanced oil recovery, Broad market prospects and the effect of improving viscosity

Active Publication Date: 2018-02-06
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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  • A kind of sulfonate betaine type hydrophobic association polymer and preparation method thereof
  • A kind of sulfonate betaine type hydrophobic association polymer and preparation method thereof
  • A kind of sulfonate betaine type hydrophobic association 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 3 hours.

[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 ...

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Abstract

The invention discloses a sulfonate betaine type hydrophobic association polymer and a preparation method thereof. The preparation process of the sulfonate betaine type hydrophobic association polymer is as follows: first, acrylamide and acrylic acid are mixed in an aqueous solution, adjusted The pH of the system is about 6~8, add 3-(methacrylamide propyl dimethylamino) propane sulfonate, N-aryl-N-alkyl (meth)acrylamide and sodium lauryl sulfate, Stir until the solution is clear, pass nitrogen to remove oxygen, add photoinitiator azobisisobutylamidine hydrochloride, and carry out polymerization under photoinitiation conditions. The present invention combines the advantages of double-tailed hydrophobic association polymers and betaine-type polymers, significantly improves viscosity increasing, temperature resistance, salt resistance, and hydrolysis resistance, and can be used for flooding of enhanced oil recovery in oilfield development The preparation method of the oil agent or acidified fracturing thickener has reliable principle, simple operation and broad 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 Patents(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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