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Water-soluble hyperbranched thick oil viscosity-reducing oil-displacing agent and preparation method thereof

A viscous oil-displacing agent and water-soluble technology, applied in the field of water-soluble hyperbranched heavy oil viscosity-reducing oil-reducing agent and its preparation, can solve the problem of low water-flooding recovery rate, complicated synthesis steps, polymer heavy oil viscosity-reducing agent problems such as poor solubility, to achieve the effect of expanding the swept volume, simple synthesis steps, and good shear resistance

Active Publication Date: 2019-11-22
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One object of the present invention is to provide a water-soluble hyperbranched heavy oil viscosity reduction flooding oil for the problems of low water flooding recovery in ordinary heavy oil reservoirs, poor solubility of existing polymer heavy oil viscosity reducers, and cumbersome synthesis steps agent

Method used

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  • Water-soluble hyperbranched thick oil viscosity-reducing oil-displacing agent and preparation method thereof
  • Water-soluble hyperbranched thick oil viscosity-reducing oil-displacing agent and preparation method thereof
  • Water-soluble hyperbranched thick oil viscosity-reducing oil-displacing agent and preparation method thereof

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Embodiment 1

[0028] A preparation method of a water-soluble hyperbranched heavy oil viscosity reducing oil displacement agent, the steps are as follows:

[0029] S1. Functional modification of backbone monomer 2.0 generation polyamide-amine

[0030]Dissolve 8.00g of 2.0-generation polyamidoamine monomer and 4.38g of maleic anhydride in 30g of N,N-dimethylformamide solution in sequence, and place the system in an ice-water bath (below 10°C) In the process, nitrogen protection was carried out for 40 minutes at the same time, and the stirring condition was completely dissolved; the reaction was carried out at room temperature and protected from light for 7 to 8 hours, and a brown transparent solution of the functionalized skeleton monomer after modification was obtained; the solution was added to an equal volume of chloroform solution. , a light yellow powdery substance can be precipitated, which is a relatively pure functionalized backbone monomer modified polyamide-amine. Reaction equation...

Embodiment 2

[0042] A preparation method of a water-soluble hyperbranched heavy oil viscosity reducing oil displacement agent, the steps are as follows:

[0043] Steps S1 and S2 are the same as in Embodiment 1.

[0044] S3. Put a certain amount of deionized water in the reaction vessel, and add 0.29% by mass of the 2.0th generation functionalized backbone monomer polyamide-amine, 16.82% Acrylamide, 17.05% acrylic acid, 44.05% octylphenol polyoxyethylene ether maleate (n is 20) and 21.79% 2-acrylamido sodium tetradecylsulfonate monomer (monomer The total amount is 100%), mixed and stirred evenly, and prepared into a reaction solution with a total mass percentage concentration of five monomers of 25%, and then vacuumized for 10 minutes to remove dissolved gas in the solution.

[0045] S4, adding sodium carbonate to the reaction solution to adjust the pH value of the solution to 8.0, then in a water bath at 50°C and at a stirring rate of 250r / min, protect with inert gas nitrogen for 60min; t...

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Abstract

The invention discloses a water-soluble hyperbranched thick oil viscosity-reducing oil-displacing agent and a preparation method thereof. The viscosity reducing oil displacing agent is prepared by copolymerizing 0.01%-1.0% of a functionalized skeleton monomer, 10%-20% of acrylamide, 10%-20% of acrylic acid, 40%-50% of a nonionic functional monomer octylphenol polyoxyethylene ether and 20%-25% of an anionic monomer 2-acrylamidotetradecyl sodium sulfonate. The viscosity-reducing oil-displacing agent is relatively strong in water-phase tackifying capacity and good in anti-shearing performance, sothat the viscosity-reducing oil-displacing agent has the functions of controlling the fluidity ratio and expanding the swept volume; meanwhile, the viscosity-reducing oil-displacing agent has stronger mixed emulsifying property with thickened oil, the emulsifying viscosity-reducing rate of common thickened oil is more than 80%, the demulsification is easy, and the effects of reducing viscosity and displacing oil are realized. The raw materials for preparing the viscosity-reducing oil-displacing agent are wide in source, the preparation process is simple and convenient, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploitation, in particular to a water-soluble hyperbranched heavy oil viscosity-reducing oil displacement agent and a preparation method thereof. Background technique [0002] With the increase of oil consumption, the content of conventional oil that can be exploited decreases, which leads to the tight production and supply of conventional oil resources in the world today. However, heavy oil resources are abundant, accounting for a large proportion of the world's oil and gas resources, and are the key to the production and development of oil resources. An important part of. Compared with conventional crude oil, the content of colloids and asphaltene in heavy oil is high, and the content of light components is low, resulting in high viscosity, high density and poor rheology of heavy oil. According to my country's heavy oil classification standards, crude oil with a viscosity of 50-1000 mPa·s ...

Claims

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Application Information

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IPC IPC(8): C08F283/06C08F283/00C08F220/56C08F220/06C08F220/58C09K8/584C09K8/524
CPCC08F283/065C08F283/002C09K8/584C09K8/524
Inventor 施雷庭晋清磊谌茂叶仲斌陈洪赵启明
Owner SOUTHWEST PETROLEUM UNIV
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