Supercritical carbon dioxide thickening agent as well as preparation method and application thereof

A technology of thickener and catalyst, which is applied in the field of supercritical carbon dioxide thickener, can solve the problems of environmental friendliness and high-efficiency thickening at the same time, and achieve no water-sensitive water lock damage, high yield, and good thickening effect Effect

Active Publication Date: 2016-05-25
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Other supercritical carbon dioxide thickeners also include 1H, 1H, 2H, 2H-perfluorodecyl acrylate and Styrene copolymers

Method used

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  • Supercritical carbon dioxide thickening agent as well as preparation method and application thereof
  • Supercritical carbon dioxide thickening agent as well as preparation method and application thereof
  • Supercritical carbon dioxide thickening agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Under the condition of nitrogen, add 0.8g refined azobisisobutyronitrile (AIBN) initiator in the three-necked flask equipped with reflux condenser and magnet, then inject 35mL vinyl acetate and 120mL chloroform, Reflux reaction at 62°C for 5h. After the reaction is finished, the solvent chloroform and unreacted vinyl acetate monomer are distilled off under reduced pressure to obtain a polyvinyl acetate telomer. The polyvinyl acetate telomer was dissolved in 30 mL of tetrahydrofuran and then refluxed at 62°C for 5 h for purification. After the reflux was completed, tetrahydrofuran was distilled off under reduced pressure, and the purified polyvinyl acetate telomer was dried in a vacuum drying oven to constant weight.

[0064] Add 50mL of p-xylene to a three-necked flask with a ventilation tube (argon gas), reflux condenser and stirring magnet, and add 0.2g of CuCl, 19.8g of 1-heptene, 0.70g of PMDETA, and 25g of polyvinyl acetate to adjust Polymer, wherein, the molar r...

Embodiment 2

[0069] Under nitrogen, add 1.0 g of refined azobisisobutyronitrile (AIBN) initiator into a three-necked flask equipped with a reflux condenser and a magnet, then inject 50 mL of methyl methacrylate, 200 mL of chloroform , Reflux reaction at 60°C for 6h. After the reaction was completed, the solvent trichloromethane and unreacted methyl methacrylate monomer were distilled off under reduced pressure to obtain a polymethyl methacrylate telomer. The polymethyl methacrylate telomer was dissolved in 40 mL of tetrahydrofuran and then refluxed at 60° C. for 4 h for purification. After the reflux was completed, tetrahydrofuran was distilled off under reduced pressure, and the purified polymethyl methacrylate telomer was dried in a vacuum drying oven to constant weight.

[0070]Add 40mL of p-xylene to a three-necked flask with a ventilation tube (argon), a reflux condenser, and a stirring magnet, and add 0.3g of CuBr, 23.6g of 1-octene, 0.48g of TMEDA, and 20g of polymethylmethacrylate...

Embodiment 3

[0074] Under nitrogen, add 0.2g of refined azobisisobutyronitrile (AIBN) initiator into a three-necked flask equipped with a reflux condenser and a magnet, then inject 60mL of acrylic acid and 160mL of chloroform, at 66°C Under the condition of reflux reaction for 7h. After the reaction is completed, the solvent chloroform and unreacted acrylic acid monomers are distilled off under reduced pressure to obtain a polyacrylic acid telomer. The polyacrylic acid telomer was dissolved in 50 mL of tetrahydrofuran and then refluxed at 66° C. for 8 h for purification. After the reflux was completed, tetrahydrofuran was distilled off under reduced pressure, and the purified polyacrylic acid telomer was dried in a vacuum drying oven to constant weight.

[0075] Add 60mL of p-xylene to a three-necked flask with a ventilation tube (argon), a reflux condenser, and a stirring magnet, and add 0.4g of CuI, 26.5g of 1-nonene, 0.66g of 2,2-bipyridine, 30g of Polyacrylic acid telomer, wherein th...

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Abstract

The invention belongs to the technical field of oil field chemicals and relates to a supercritical carbon dioxide thickening agent as well as a preparation method and application thereof. The invention provides a copolymer comprising CO2-philic monomers and tackifying monomers. The invention further provides a preparation method of the copolymer and use of the copolymer as a thickening agent in the development of shale gas. The supercritical carbon dioxide thickening agent is high in yield and good in repeatability and simultaneously has high efficiency and environmental friendliness, and a synthetic method is simple. The prepared copolymer which is used as the thickening agent has the characteristics of high solubility in carbon dioxide, good tackifying performance, environmental friendliness and the like and can be applied to the exploiting field of shale oil and gas resources such as CO2 crushing, and the purpose of efficient and environment-friendly construction is achieved.

Description

technical field [0001] The invention belongs to the technical field of oilfield chemicals, and relates to a supercritical carbon dioxide thickener and its preparation and application. Background technique [0002] As an efficient and clean energy source, shale gas has huge economic and environmental benefits. According to the research report of the World Resources Institute (WRI, 2014), the technically recoverable reserves of shale gas in my country rank first in the world, about It is twice that of the United States; in 2014, the "China Shale Gas Resources Investigation Report" issued by the China Geological Survey Bureau of the Ministry of Land and Resources also pointed out that my country's shale gas resources have huge potential, with the potential of recoverable resources reaching 25 trillion cubic meters. [0003] Shale gas reservoirs are characterized by low porosity and low permeability, and the release of free gas, dissolved gas and adsorbed gas must be achieved thr...

Claims

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Application Information

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IPC IPC(8): C08F263/04C08F265/04C08F265/02C08F210/14C08F212/14C08F212/08C09K8/62
CPCC08F263/04C08F265/02C08F265/04C09K8/62C09K8/882C08F210/14C08F212/08C08F212/14Y02P20/54
Inventor 朱阳升余伟胜孙楠楠宋学行魏伟孙予罕
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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