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Comb-typed amphiphilic water-soluble co-polymer, method for preparing same and use

A water-soluble copolymer and copolymer technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., to achieve strong electrostatic shielding effect, lower solution viscosity, and less curling effects

Inactive Publication Date: 2008-10-15
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present inventors found that various reaction conditions in the polymerization reaction, such as anionic monomer concentration, surface active macromonomer concentration, reaction temperature, etc., have a great influence on the obtained polymer structure and solution behavior

Method used

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  • Comb-typed amphiphilic water-soluble co-polymer, method for preparing same and use
  • Comb-typed amphiphilic water-soluble co-polymer, method for preparing same and use
  • Comb-typed amphiphilic water-soluble co-polymer, method for preparing same and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Dissolve 20.000 grams of acrylamide, 9.480 grams of acrylic acid, and 13.050 grams of 4-vinylbenzyloctylphenol polyoxyethylene ether (the adduct EO of polyoxyethylene ether is 40) in 590 ml of distilled water, and add them to a three-necked reaction flask. Use NaOH to adjust the pH of the solution to 6, the reaction temperature is 65°C, and N 2 After 30 minutes, add 3.90 mL of 0.05 mol / L potassium persulfate initiator solution, react for 24 hours, and dilute the polymer with water to obtain a concentrated PABE solution.

Embodiment 2

[0036] Dissolve 20.000 g of acrylamide, 4.550 g of 2-acrylamido-2-methylpropanesulfonic acid, and 8.942 g of 4 vinylbenzylnonylphenol polyoxyethylene ether (EO = 10) in 420 ml of deionized water, and use NaOH adjusts the pH=5, the reaction temperature is 55°C, and N 2 After 30 minutes, add 1.62 mL of 0.05 mol / L ammonium persulfate initiator solution, and react for 16 hours. The polymer was dissolved in water to prepare a concentrated solution of PABE.

Embodiment 3

[0038] Dissolve 20.000 grams of acrylamide, 7.310 grams of vinylbenzenesulfonic acid, and 5.800 grams of allyl octylphenol polyoxyethylene ether (EO: 10) in 260 ml of deionized water, adjust the pH to 8 with NaOH, and the reaction temperature is 50°C , through N 2 After 30 minutes, add 1.600 mL of 0.05 mol / L potassium persulfate initiator solution and react for 24 hours. The polymer was dissolved in water to prepare a concentrated solution of PABE.

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Abstract

The invention discloses a comb-type amphipathicity water-solubility multipolymer and a method for making the same as well as an application. The method is characterized in that: 20 portions of acrylamide, 0.1 to 10 portions of negative ion monomer, 0.5 to 15 portions of at least one of the surface activity macromolecular monomer 4-vinyl benzyl alkylphenol polyoxyethylene ether or / and allyl alkylphenol polyoxyethylene ether and 30 to 600 portions of deionized water are added into a three-necked reaction bulb, the pH value of the solution is adjusted to between 4 and 9, N2 is introduced into the solution for 30 minutes, 0.002 to 0.3 portion of evocating agent sulphate is added at the temperature of between 30 and 70 DEG C to react 12 to 36 hours in order to prepare PABE which is diluted by water to obtain the PABE strong solution; the comb-type amphipathicity water-solubility multipolymer which can viscosify, has salt resistance and the low surface tension as well as the molecular association ability and can be used for the fuel scavenge. The multipolymer is prepared into a water solution with a mass concentration between 0.3 and 3g / L and a surface active agent concentration between 0.01 and 2mmol / L, the water solution is added into a blending container with a stirring device and is stirred evenly at room temperature so that the polymer oil-displacing agent which can viscosify and shear-resistant and has excellent anti-aging performance in a hyperhaline state and at the temperature of 70 DEG C. The PABE has the double function of a tackifier and a macromolecule surfactant. Infinitesimal low molecular surface active reagent is added into the PABE solution, thereby evidently increasing the apparent viscosity of the solution, reducing the surface tension and the oil-water boundary tension of the solution and contributing to improving the recovery ratio.

Description

1. Technical field [0001] The invention relates to a comb-shaped amphiphilic water-soluble copolymer and its preparation method and application, belonging to the fields of polymer materials and enhanced oil recovery. 2. Technical Background [0002] At present, with the rapid development of our country's economy, the contradiction between the supply and demand of petroleum resources is becoming more and more prominent, and only 30%-40% of the formation reserve crude oil can be recovered by conventional oil recovery technology. Therefore, in order to increase the oil recovery, it is of great research significance and application value to continuously update the drilling technology and develop and develop chemical agents that can greatly increase the oil recovery. Polymer flooding is an effective technology in tertiary oil recovery technology, but the polymer used in industry is still mainly partially hydrolyzed polyacrylamide (HPAM) and its cross-linked weak gel, its molecula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F4/30C08F2/10C09K8/588C08F220/06C08F222/02C08F228/00
Inventor 钟传蓉饶明雨曾礼林王伟
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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