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Preparation method and application of double-braid polymer surfactant containing long carbon chains

A technology of surfactants and polymers, applied in the field of double-braided polymer surfactants and their preparation, can solve the problems of difficult to achieve viscosity reduction, difficult to form, and unable to reduce the viscosity of heavy oil, and achieve an excellent interface Effects of activity, storage convenience, excellent permeability and wetting properties

Active Publication Date: 2020-01-31
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main reason is that for polymer flooding, the polymer only increases the viscosity of the displacement fluid, but cannot reduce the viscosity of heavy oil. Therefore, the range of reducing the mobility ratio of heavy oil / water is small, and the range of expanding the swept volume is also small; for surface active In terms of flooding with emulsified viscosity reducer (low molecular weight), under high shear conditions indoors, oil-in-water emulsions can be formed to achieve the purpose of viscosity reduction, but under low shear conditions in the formation, it is difficult to form oil-in-water emulsions , It is difficult to achieve the purpose of viscosity reduction

Method used

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  • Preparation method and application of double-braid polymer surfactant containing long carbon chains
  • Preparation method and application of double-braid polymer surfactant containing long carbon chains
  • Preparation method and application of double-braid polymer surfactant containing long carbon chains

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] (1) In a 250mL three-neck flask equipped with a thermometer, a magnetic stirrer, a water separator and a reflux condenser, isomeric tridecyl polyoxyethylene ether (20.0000g, 31.250 mmol), maleic anhydride (1.2258g, 12.501mmol), toluene (100mL); after stirring and dissolving, add p-toluenesulfonic acid (0.2547g, 1.479mmol), heat up to the reflux of the reaction solution, and control the reaction temperature to 120±5°C , After the reaction was refluxed for 5h, the heating was stopped and cooled.

[0064] (2) Pour the reaction solution in step (1) into a separatory funnel, wash it several times with 5wt% aqueous sodium bicarbonate solution and saturated saline to neutrality, dry with anhydrous sodium sulfate, and dry the solution After concentrating under reduced pressure, a yellow oil was obtained, which was diisomeric tridecyl polyoxyethylene ether maleic acid diester (I13C) containing 10 ethyleneoxy EO units. 10 MA) 14.25 g.

[0065] The proton nuclear magnetic resona...

Embodiment 2

[0068] The preparation method is the same as in Example 1, the difference is that in step (1), isomeric tridecyl polyoxyethylene ether (20.0000g, 23.225mmol) containing 15 ethyleneoxy EO units, Malay Anhydride (0.8133 g, 8.294 mmol) and p-toluenesulfonic acid (0.3743 g, 2.174 mmol).

[0069] The yellow oily product obtained was diisomeric tridecyl polyoxyethylene ether maleate diester (I13C) containing 15 ethyleneoxy EO units. 15 MA) 11.63 g.

[0070] H NMR spectrum ( 1 HNMR, 400MHz, CDCl 3 ) data are as follows: δ (ppm): 6.25 (2H, hydrogen-C on the double bond H =C H -),3.33-4.35(120H, for 30-OC H 2 C H 2 O-),0.5-1.70(54H, for alkyl hydrogen C 13 H 27 -).

[0071] Through proton nuclear magnetic resonance spectrum analysis, confirm that the product that obtains is the diisomeric tridecyl polyoxyethylene ether maleic acid diester (I13C containing 15 ethylene oxide EO units. 15 MA).

Embodiment 3

[0073] The preparation method is the same as in Example 1, the difference is that in step (1), isomeric tridecyl polyoxyethylene ether (20.0000g, 13.158mmol) containing 30 ethyleneoxy EO units, Malay Anhydride (0.5161 g, 5.263 mmol) and p-toluenesulfonic acid (0.3077 g, 1.787 mmol).

[0074] The yellow oily product obtained is diisomeric tridecyl polyoxyethylene ether maleate diester containing 30 ethyleneoxy EO units (I13C 30 MA) 13.16 g.

[0075] H NMR spectrum ( 1 HNMR, 400MHz, CDCl 3 ) data are as follows: δ (ppm): 6.24 (2H, hydrogen-C on the double bond H =C H -),3.31-4.35(240H, for 60-OC H 2 C H 2 O-),0.5-1.70(54H, for alkyl hydrogen C 13 H 27 -).

[0076] Through proton nuclear magnetic resonance spectrum analysis, confirm that the product that obtains is the diisomeric tridecyl polyoxyethylene ether maleic acid diester (I13C containing 30 ethylene oxide EO units. 30 MA).

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Abstract

The invention provides a preparation method and application of a double-braid polymer surfactant containing long carbon chains. The double-braid polymer surfactant has a structure as shown in formula(I), wherein x is 1-30; m / (m + n + p) * 100% = 90.3%-94.45%; n / (m + n + p) * 100% = 5.5%-9.5%; p / (m + n + p) * 100%=0.05%-0.2%. The surfactant provided by the invention enables thickened oil to form astable oil-in-water emulsion under the condition of low stratum shear, so that the purpose of viscosity reduction is achieved; certain tackifying performance on water phase is achieved, under the synergistic effect of the two components, the oil-water fluidity ratio is improved, so that the swept volume is enlarged, and the water drive recovery rate of the thickened oil is increased.

Description

technical field [0001] The present invention relates to the field of chemical engineering, specifically, the present invention relates to a double-braided polymer surfactant and its preparation and application, more specifically, the present invention relates to a diisomeric tridecyl polyoxyethylene Double-braided polymer surfactant of ether maleic acid diester, its preparation method and application. Background technique [0002] Heavy oil development methods include thermal recovery (steam huff and puff, steam flooding, burning oil layer, SPGD) and cold recovery (water flooding). my country's water flooding thick oil reserves account for 30.1% of the total heavy oil reserves, and the output of water flooding accounts for 30.1% of the total heavy oil production. 18%. Due to the high viscosity of heavy oil and serious reservoir heterogeneity, the recovery rate of heavy oil water flooding is only 5-30% (the recovery rate of thin oil water flooding is 40%). [0003] In order t...

Claims

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Application Information

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IPC IPC(8): C08F290/06C08F220/56C08F220/58C09K8/584C09K8/60C09K8/88
CPCC08F290/062C09K8/584C09K8/604C09K8/882C08F220/56
Inventor 张付生孟卫东刘国良廖龚晴李雪凝
Owner PETROCHINA CO LTD
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