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Method for preparing oil-displacing agent of high-tack-producing hydrophobic association polymer

A technology of hydrophobic association and water-soluble polymers, which is applied to drilling equipment and other fields, and can solve the problems of high critical association concentration and low viscosity

Inactive Publication Date: 2003-03-26
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Applications are limited by hydrophobically associating water-soluble polymers due to their high critical association concentration and low viscosity at lower polymer concentrations

Method used

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  • Method for preparing oil-displacing agent of high-tack-producing hydrophobic association polymer
  • Method for preparing oil-displacing agent of high-tack-producing hydrophobic association polymer
  • Method for preparing oil-displacing agent of high-tack-producing hydrophobic association polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Dissolve 5.91 grams of acrylamide, 1.06 grams of sodium acrylate, 0.1 grams of N-p-butylphenylacrylamide and 10 grams of sodium lauryl sulfate in 81.3 milliliters of deionized water and add them to a three-necked bottle to adjust the pH of the solution to 9- 10. The temperature of the reaction system is 50°C, and N 2 Add 13.3 mg of potassium persulfate initiator after 30 minutes, and react for 12 hours. The polymer was diluted with water, then precipitated with acetone, washed, and dried in vacuum to obtain a white powdery AM-NaAA-BPAM polymer. A certain amount of polymer was taken to prepare an aqueous sample of an oil displacement agent, which was colorless and transparent. The polymer concentration is 0.15wt%, the sodium tetradecyl sulfate concentration is 0.5 mmol / liter, and the NaCl concentration is 1.5wt%, add it into a mixing tank with a stirrer and a thermometer, and stir evenly at a temperature of 25°C to obtain Highly viscous hydrophobic association water-sol...

Embodiment 2

[0029] Dissolve 6.6 grams of acrylamide, 3.5 grams of sodium acrylate, 0.1 grams of N-p-butylphenylacrylamide and 2.7 grams of sodium lauryl sulfate in 81.3 milliliters of deionized water, adjust the pH of the solution to 9-10, and the temperature of the reaction system at 50°C, through N 2Add 13.3 mg of potassium persulfate initiator after 30 minutes, and react for 12 hours. The polymer was diluted with water, then precipitated with acetone, washed, and dried in vacuum to obtain a white powdery AM-NaAA-BPAM polymer. A certain amount of polymer was taken to prepare an oil displacement agent aqueous solution sample, which was colorless and transparent, and the polymer concentration was 0.2wt%, cetyltrimethylammonium bromide concentration is 1 mmol / liter, and NaCl concentration is 1.5wt%, add in the mixing kettle with agitator and thermometer, stir evenly at temperature 30 ℃, obtain high Viscosified hydrophobically associated water-soluble polymer oil displacing agent.

Embodiment 3

[0031] Dissolve 4.16 grams of acrylamide, 2.91 grams of sodium acrylate, 0.1 grams of N-p-butylphenylacrylamide and 1.8 grams of sodium lauryl sulfate in 81.3 milliliters of deionized water, adjust the pH of the solution to 9-10, and the temperature of the reaction system at 50°C, through N 2 Add 13.3 mg of potassium persulfate initiator after 30 minutes, and react for 12 hours. The polymer product was diluted with water, then precipitated with acetone, washed, and vacuum-dried to obtain a white powdery AM-NaAA-BPAM polymer. A certain amount of polymer solution was taken to prepare an oil displacement agent aqueous solution sample. The polymer concentration was 0.1wt%. The concentration of dialkyl dimethyl ammonium oxide is 0.5 mmol / L, and the concentration of NaCl is 0.5 wt%. Add it into a mixing kettle with a stirrer and a thermometer, and stir evenly at a temperature of 35°C to obtain a highly viscosified hydrophobic association water-soluble Polymer oil displacing agent. ...

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Abstract

There is a method of high stickly thick water association polymer degreaser, its character is that the propylene acyl (AM)-natrium acrylate (NaAA)-N-p-butyl benzene propylene acyl (BPAM) thick water association water soluble polymer is confected into 0.1-0.3 wt% thickness, the thickness of surface active agent is 0.01-1 mmol / liter and the thickness of NaCL is 0.5-1.5 wt5, they are added into blending pot which has blender and thermometer, they are blended under 25-40 degree C equably, the degreaser is got.

Description

1. Technical field [0001] The invention relates to a preparation method of a high-viscosity hydrophobic association polymer oil displacement agent, which belongs to the field of polymer synthesis. 2. Background technology [0002] Hydrophobically associated water-soluble polymers refer to a class of water-soluble polymers with a small amount of hydrophobic groups on the hydrophilic macromolecular chain of the polymer. Due to its unique solution properties such as viscosity increasing, salt resistance and shear resistance, it has a good application prospect as a new type of polymer oil displacement agent in the development of high-salt and high-shear reservoirs. Scholars at home and abroad have done a lot of research and exploration work on the structure, properties, viscosity-increasing mechanism and application of hydrophobically associated water-soluble polymers. [0003] At present, only partially hydrolyzed polyacrylamide (PAM) is the industrial product commonly used in...

Claims

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Application Information

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Inventor 叶林黄萍黄荣华
Owner SICHUAN UNIV
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