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KGM (konjac glucomannan) blended polymer oil displacement agent and preparation method thereof

A blended polymer and oil displacement agent technology, applied in the field of KGM blended polymer oil displacement agent, to achieve good temperature resistance, improved thermal stability, and enhanced oil recovery

Inactive Publication Date: 2015-05-27
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

KGM is widely used as a film-forming material, and the film material prepared by solution blending of KGM and chitosan has good cell degradability, and the method of solution blending with polydimethyldiallylammonium chloride The prepared film material has good thermal stability and mechanical properties (Xiao C.et al.Blend films from konjac glucomannan and sodium alginate solutions and their preservative effect.J Appl Polym Sci.2000(77):617), and KGM In the preparation of gel materials (Nishinari K.et al.Rheological and DSC studies on the interaction between gellan gum and konjac glucomannan.Carbohydr Polym.1996(30):193), controlled release materials (Wen X.et al.Preparation of konjac glucomannan hydrogels as DNA-cont rolled release matrix.Int J Biol Macromol.2008(42):256), immobilized carrier (Rong L.et al.Direct elect rochemist ryand elect rocatalysis of myoglobin ent rapped in konjac glucomannan films.Chin J Anal Chem.2006(34): 1683) and affinity chromatography carrier (An Qing et al. Performance of strong acid type konjac glucomannan-based ion exchange resin. Polymer Materials Science and Engineering. 2008(1): 139), etc. It also has a wide range of applications, but it is rarely reported that it is used in the synthesis of oilfield chemicals

Method used

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  • KGM (konjac glucomannan) blended polymer oil displacement agent and preparation method thereof
  • KGM (konjac glucomannan) blended polymer oil displacement agent and preparation method thereof
  • KGM (konjac glucomannan) blended polymer oil displacement agent and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0053] Embodiment 1: the preparation of NCE monomer

[0054] Add 3g of 2-pyridinecarboxylic acid, 6mL of thionyl chloride and 10mL of dichloromethane in sequence in the reaction flask, heat up to 55°C for 2-6h after the addition, cool down to room temperature, and spin out the unreacted thionyl chloride. Obtain light red solid product 2-pyridine carboxylic acid chloride, yield 98-99.5%; Dilute the 2-pyridine carboxylic acid chloride obtained in the previous step with dry methylene chloride, and slowly add 3.5g diallyl dichloride dropwise under ice bath A mixed solution of amine and 10.9g triethylamine, react at 25°C for 4-6h to stop the reaction after dropping, and the reaction solution is washed with water, washed with alkali, dried, filtered, and distilled under reduced pressure to obtain NCE, a light brown liquid monomer. The yield was 87.8%.

Embodiment 2

[0055] Embodiment 2: the preparation of NCT monomer

[0056] Add 3g of 3-pyridinecarboxylic acid and 6mL of thionyl chloride successively into the reaction flask, heat up to 55°C for 2-6h after the addition, and then cool to room temperature, spin off the unreacted thionyl chloride to obtain the white solid product 3 -Pyridine carboxylic acid chloride, yield 98-99.5%; Dilute the 3-pyridine carboxylic acid chloride obtained in the previous step with dry dichloromethane, slowly add 3.5g diallylamine and 10.9g triethylamine dropwise under ice bath The mixed solution of amines was reacted at 25°C for 4-6 hours to stop the reaction after dropping. The reaction solution was washed with water, washed with alkali, dried, filtered, and distilled under reduced pressure to obtain NCT, a dark yellow liquid monomer, with a yield of 88.2%.

Embodiment 3

[0057] Embodiment 3: the preparation of NCI monomer

[0058] Add 3g of 4-pyridinecarboxylic acid and 6mL of thionyl chloride to the reaction flask in sequence, heat up to 55°C and react for 2-6h after the addition, cool down to room temperature, spin out the unreacted thionyl chloride to obtain the white solid product 4 -Pyridine carboxylic acid chloride, yield 98-99.5%; The 3.4g 4-pyridine carboxylic acid chloride obtained in the previous step was diluted with dry dichloromethane, slowly added dropwise 3.5g diallylamine and 10.9g The mixed solution of triethylamine was reacted at 25°C for 4-6 hours to stop the reaction after dropping. The reaction solution was washed with water, washed with alkali, dried, filtered and distilled under reduced pressure to obtain NCI, a dark red liquid monomer, with a yield of 89.6%.

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Abstract

The invention relates to a KGM (konjac glucomannan) water-soluble blended polymer oil displacement agent and a preparation method thereof. The technical scheme is as follows: three water-soluble blended polymers containing KGM are obtained by respectively polymerizing KGM, acrylamide (AM) and sodium acrylate (NaAA) with N, N-diallyl-2-pyridinecarboxamide (NCE), N, N-diallyl-3-pyridinecarboxamide (NCT) or N, N-diallyl-4-pyridinecarboxamide (NCI) in a sodium bisulfite-ammonium persulfate (NaHSO3-(NH4)2S2O8) initiation system. The KGM water-soluble blended polymer oil displacement agent uses the following raw materials in percentage by weight: 1-2% by weight of KGM, 60-70% of AM, 30-40% of NaAA and 0.3-0.4% of pyridine ring type monomer. The synthesized polymers have the advantages of good water solubility, temperature resistance, salt resistance and anti-shearing performance, and can improve the recovery ratio of simulation crude oil by above 12%.

Description

technical field [0001] The invention relates to a kind of KGM blended polymer oil displacement agent used for oil displacement and enhanced crude oil recovery in oil field of petroleum industry and a preparation method thereof. Background technique [0002] With the continuous deepening of oil reservoir exploration and development, there are still many problems in water-soluble polymers commonly used in tertiary oil recovery. For example, the hydrolyzed molecular chain of PAM is seriously curled under high temperature and high salt environment; xanthan gum is sensitive to bacteria, and it is easy to biodegrade and block the formation. Therefore, there is an urgent need to carry out more in-depth research on water-soluble polymers from the aspects of molecular design and synthesis applications, and to develop polymer oil-displacing agents with good comprehensive properties such as low price, temperature resistance, salt resistance and shear resistance, so as to meet modern T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/00C08F220/56C08F220/06C08F226/02C09K8/588
Inventor 苟绍华刘曼叶仲斌刘钊尹婷周利华杨成
Owner SOUTHWEST PETROLEUM UNIV
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