Water-soluble ionic type hydrophobic associated polymer oil-displacing agent and preparation method and application thereof

A hydrophobic association and ionic technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of poor temperature resistance and shear dilution resistance, complicated operation, high cost, low cost and simple preparation method. , the effect of stable performance

Inactive Publication Date: 2014-11-12
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a water-soluble ionic hydrophobic association polymer oil displacement agent to solve the problems of existing oil displacement agents with poor temperature resistance, salt resistance and shear dilution resistance
[0008]

Method used

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  • Water-soluble ionic type hydrophobic associated polymer oil-displacing agent and preparation method and application thereof
  • Water-soluble ionic type hydrophobic associated polymer oil-displacing agent and preparation method and application thereof
  • Water-soluble ionic type hydrophobic associated polymer oil-displacing agent and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] 1. Preparation of cationic monomer 3-(allyloxy)-N,N,N-triethyl-2-hydroxypropane ammonium bromide (MOC)

[0062] The preparation method of MOC comprises the steps:

[0063] (1) After allyl glycidyl ether (a1) is diluted with the first organic solvent dichloromethane, the temperature is raised to reflux, and diethylamine (a2) is added dropwise to react; wherein, by the amount of substance, n (a1):n(a2)=1:1.1;

[0064] (2) After the dropwise addition was completed, the reaction was continued for 5 hours to obtain a crude product of 1-(allyloxy)-3-(diethylamino)propan-2-ol (a3);

[0065] (3) with reduced pressure distillation, remove the first organic solvent methylene chloride and excess diethylamine, obtain purer a3;

[0066] (4) After diluting a3 with the second organic solvent toluene, slowly drop bromoethane (a4) at 80°C; continue the reaction for 5 hours to obtain 3-(allyloxy)-N,N, N-triethyl-2-hydroxypropane-1-ammonium bromide (MOC) crude product; Wherein, by the ...

Embodiment 2

[0093] 1. Preparation of cationic monomer 3-(allyloxy)-N,N,N-triethyl-2-hydroxypropane ammonium bromide (MOC)

[0094] The preparation method of MOC comprises the steps:

[0095] (1) After allyl glycidyl ether (a1) is diluted with the first organic solvent dichloromethane, the temperature is raised to reflux, and diethylamine (a2) is added dropwise to react; wherein, by the amount of substance, n (a1):n(a2)=1:1.5;

[0096] (2) After the dropwise addition was completed, the reaction was continued for 5 hours to obtain a crude product of 1-(allyloxy)-3-(diethylamino)propan-2-ol (a3);

[0097] (3) with reduced pressure distillation, remove the first organic solvent methylene chloride and excess diethylamine, obtain purer a3;

[0098] (4) After diluting a3 with the second organic solvent toluene, slowly drop bromoethane (a4) at 80°C; continue the reaction for 8 hours to obtain 3-(allyloxy)-N,N, N-triethyl-2-hydroxypropane-1-ammonium bromide (MOC) crude product; Wherein, by the am...

Embodiment 3

[0125] 1. Preparation of cationic monomer 3-(allyloxy)-N,N,N-triethyl-2-hydroxypropane ammonium bromide (MOC)

[0126] The preparation method of MOC comprises the steps:

[0127] (1) After allyl glycidyl ether (a1) is diluted with the first organic solvent dichloromethane, the temperature is raised to reflux, and diethylamine (a2) is added dropwise to react; wherein, by the amount of substance, n (a1):n(a2)=1:1.3;

[0128] (2) After the dropwise addition was completed, the reaction was continued for 5 hours to obtain a crude product of 1-(allyloxy)-3-(diethylamino)propan-2-ol (a3);

[0129] (3) with reduced pressure distillation, remove the first organic solvent methylene chloride and excess diethylamine, obtain purer a3;

[0130] (4) After diluting a3 with the second organic solvent toluene, slowly drop bromoethane (a4) at 80°C; continue the reaction for 7 hours to obtain 3-(allyloxy)-N,N, N-triethyl-2-hydroxypropane-1-ammonium bromide (MOC) crude product; Wherein, by the ...

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Abstract

The invention discloses a water-soluble ionic type hydrophobic associated polymer oil-displacing agent and a preparation method and application of the water-soluble ionic type hydrophobic associated polymer oil-displacing agent. The oil-displacing agent is prepared by five monomers which include acrylamide, acrylic acid, 3-(allyloxy)-N,N,N-triethyl-2-hydroxy propane ammonium bromide, 3-(allyloxy)-2-hydroxy propane-1-sulfonic sodium salt and N-allyl-2-(2,4-dichlorophenoxy) acetamide. The oil-displacing agent has good viscosifying capacity, temperature resistance, salt resistance and anti-shearing dilutability; moreover, the preparation method of the oil-displacing agent has the advantages that the method is simple, the production rate is high, performance is stable, cost is low, and economic efficiency is high.

Description

technical field [0001] The invention relates to the technical field of oilfield chemical agents, in particular to a water-soluble ionic hydrophobic association polymer oil displacement agent and its preparation method and application. Background technique [0002] At present, the oil recovery process can be divided into three stages: primary, secondary and tertiary oil recovery; both primary and secondary oil recovery are recovered through physical methods, and the recovery rate can reach 30% to 40%. Most of the crude oil remains in the strata of the country; my country's major oil fields (such as Daqing, Shengli, Liaohe, etc.) have entered the late stage of secondary oil recovery one after another. In order to improve the recovery rate of existing oil fields, tertiary oil recovery technology has been increasingly widely used . At present, the boundaries of tertiary oil recovery have been blurred. In my country, in the development process of many new oil fields, tertiary oil ...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/06C08F216/14C08F220/58C09K8/588
Inventor 苟绍华周利华叶仲斌何杨罗珊马永涛夏鸿
Owner SOUTHWEST PETROLEUM UNIV
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