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Copolymer with polyphenyl polyether branched chain structure and preparation and application of copolymer

A technology of polyphenyl polyether and branched chain structure, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of increased viscosity of crude oil, poor emulsion stability, and reduced effect of emulsification and viscosity reduction, and achieve enhanced application performance, achieving viscosity and pour point reduction, and improving the fluidity of heavy oil

Active Publication Date: 2020-01-24
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Low-molecular-weight surfactants emulsify quickly, but the emulsion formed has poor stability, and is easy to invert into a high-viscosity water-in-oil emulsion, which increases the viscosity of crude oil instead.
Compounding low-molecular-weight surfactants with alkali or polymers can improve the stability of emulsions. However, when this compound system migrates in the formation, there is chromatographic separation, which greatly reduces the effect of emulsification and viscosity reduction, and the alkali will also bring Adverse effects such as fouling of the injection-production system

Method used

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  • Copolymer with polyphenyl polyether branched chain structure and preparation and application of copolymer
  • Copolymer with polyphenyl polyether branched chain structure and preparation and application of copolymer
  • Copolymer with polyphenyl polyether branched chain structure and preparation and application of copolymer

Examples

Experimental program
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Effect test

Embodiment 1

[0042] This embodiment provides a kind of copolymer containing polyphenyl polyether branched chain structure, and its preparation steps and raw material ratio are as follows:

[0043] Weigh 30.36g monomer E (R 1 for NH 2 , ie acrylamide), 0.86g lower unsaturated ester monomer F (R 2 for CH 3 ), 5.58g monomer G (R 3 H, m=9), 0.96g polyphenyl end-capped polyether monomer H (R 4 is H, n is 52) in the dissolver, add 104.60g deionized water, then add 4.08g sodium carbonate and stir to dissolve, adjust the temperature to 15°C, transfer the solution to the reactor, add 2.88g 3.0% ethylenediamine Disodium tetraacetate, 2.4g of 1.5% sodium bisulfite, 1.28g of 6% sodium formate and other polymerization aids, after nitrogen gas was passed for 30 minutes, 4.8g of 0.7% potassium persulfate, 3.2g of 0.25% 2,2- Nitrogen diisobutylamidine dihydrochloride, continue to pass nitrogen for 10 minutes, and then seal the reactor. After 4 hours, the reaction is completed, and the rubber block is...

Embodiment 2

[0047] This embodiment provides a copolymer containing polyphenyl polyether branched chain structure, the preparation steps and raw material ratio are:

[0048] Weigh 27.13g monomer E (R 1 for NH 2 , namely acrylamide), 1.68g lower unsaturated ester monomer F (R 2 for CH 3 ), 6.56g monomer G (R 3 H, m=9), 1.61g polyphenyl end-capped polyether monomer H (R 4 is H, n is 52) into the dissolver, add 103.2g deionized water, then add 4.18g sodium carbonate, 0.6g sodium lauryl sulfate and stir to dissolve, adjust the temperature to 13°C, and transfer the solution to the reactor , add 3.18g of 3.0% disodium ethylenediaminetetraacetic acid, 3.53g of 1.5% sodium bisulfite, 1.38g of 6% sodium hypophosphite and other polymerization aids, after passing through nitrogen for 30min, add 5.81g of 0.7% super Ammonium sulfate, 4.74g of 0.25% azobisisobutylimidium hydrochloride, continue to pass nitrogen for 10 minutes and then seal the reactor. After 4 hours, the reaction is completed, and ...

Embodiment 3

[0051] This example provides a copolymer containing polyphenyl polyether branched chain structure. The preparation steps are the same as in Example 1 (without adding alkali for neutralization). The ratio of raw materials is shown in Example 3. The molecular weight of the obtained polymer is 4.158 million.

[0052] This implementation provides a kind of copolymer containing polyphenyl polyether branched chain structure, preparation steps and raw material proportioning are:

[0053] Weigh 25.20g monomer E (R 1 is ONa, namely acrylic acid), 2.10g lower unsaturated ester monomer F (R 2 for CH 3 ), 7.11g monomer G (R 3 is H, m=9), 2.8g polyphenyl end-capped polyether monomer H (R 4 is H, n is 32) in the dissolver, add 109.34g of deionized water, then add 1.2g of sodium lauryl sulfate and stir to dissolve, adjust the temperature to 13°C, transfer the solution to the reactor, add 2.88g of 3.0% disodium ethylenediaminetetraacetic acid, 4.3g of 1.5% sodium formaldehyde sulfoxylate,...

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Abstract

The invention provides a copolymer with a polyphenyl polyether branched chain structure and preparation and application of the copolymer. The copolymer comprises a structural unit A of a formula (1) shown in the description, a low-grade ester structural unit B of a formula (2) shown in the description, a structural unit C of a formula (3) shown in the description, and a polyphenyl polyether branched chain structural unit D of a formula (4) shown in the description, and in terms of 100% by total mass of the structural unit A, the structural unit B, the structural unit C and the structural unitD in the copolymer with the polyphenyl polyether branched chain structure, the content of the structural unit A is 12.0-98.0wt%, the content of the structural unit B is 0.4-22.0wt%, the content of thestructural unit C is 0.1-28.0wt%, and the content of the structural unit D is0.5-58.0wt%. The copolymer is capable of highly dispersing aggregates such as colloid, asphaltene and wax crystals in heavy oil, has remarkable effects of viscosity reduction, coagulation reduction and emulsification on heavy oil, and is capable of greatly improving the liquidity of the heavy oil.

Description

technical field [0001] The present invention relates to the field of petroleum and petrochemicals, specifically, the present invention relates to a copolymer containing polyphenyl polyether branched chain structure and its preparation and application, especially to a kind of emulsification and viscosity reduction of heavy oil, chemical flooding to improve crude oil Copolymers containing polyphenyl polyether branched chain structure used in drilling fluid, profile control and water plugging, sewage sludge treatment and other fields. Background technique [0002] Heavy oil is an important strategic resource. With the decline of conventional crude oil production, the development of unconventional crude oil such as heavy oil is becoming more and more important. However, due to the high content of heavy components such as colloids and asphaltenes in heavy oil, high density, high viscosity, and poor fluidity, it is much more difficult to extract and gather heavy oil than conventi...

Claims

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Application Information

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IPC IPC(8): C08F283/06C08F220/56C08F220/06C09K8/584
CPCC08F283/06C09K8/584C08F220/56C08F220/06
Inventor 刘国良张付生朱卓岩管保山孙江河屈沅治苏慧敏
Owner PETROCHINA CO LTD
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