Method for prepaing granular profile control agent in copolymerization crosslinking type

A copolymerization cross-linking, granular technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of unable to adjust the pH value, sticky system, complex production process, etc.

Inactive Publication Date: 2006-07-05
李松棠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology adopts the homopolymerization of acrylamide, the initiator is ammonium salt, its pH value cannot be adjusted, the polymerization system is alkaline, the system sticks to silk, and the production process is complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Take 20g of 38.5% acrylamide aqueous solution, 5g of pure acrylic acid, 0.4g of 1% N,N'-methylenebisacrylamide aqueous solution, adjust the system pH to 8 with 35% sodium hydroxide under stirring, and then add Bentonite 8g, then add 1% potassium metabisulfite 2g, 2% ammonium persulfate aqueous solution 0.2g, move in the polymerization reactor and carry out polymerization, initial temperature 45 ℃, be warming up to 80 ℃ after reaction 3 hours, continue reaction 2 hours, Obtain granular profile control agent.

Embodiment 2

[0012] Take 50g of 38.5% acrylamide aqueous solution, 0.5g of pure acrylic acid, 2g of 1% N,N'-methylenebisacrylamide aqueous solution, adjust the pH of the system to 8.5 with 35% sodium hydroxide under stirring, and then add Bentonite 15g, then add 1% potassium metabisulfite 0.4g, 2% potassium persulfate aqueous solution 2g, move in the polymerization reactor and carry out polymerization, initial temperature 50 ℃, be warming up to 80 ℃ after reaction 3 hours, continue reaction 2 hours, Obtain granular profile control agent.

Embodiment 3

[0014] Take 50g of 38.5% acrylamide aqueous solution, 4g of pure acrylic acid, 4g of 1% N,N'-methylenebisacrylamide aqueous solution, adjust the system pH to 8.2 with 35% sodium hydroxide under stirring, and then add kaolin 30g, then add 4g of 1% potassium metabisulfite, 2g of 2% potassium persulfate aqueous solution, move into the polymerization reactor for polymerization, the initial temperature is 55°C, after 3 hours of reaction, the temperature is raised to 80°C, and the reaction is continued for 2 hours to obtain granules profile control agent.

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Abstract

This invention describes a process for preparing a new copolymerized and cross-linked granular profile control agent. The process uses two organic monomers, acrylamide and acrylic acid, as the major raw materials, bentonite or montmorillonite as the reinforcing agent, ammonium persulfate or potassium persulfate as the initiator, potassium metabisulfite as the reductant, and N,Ní»-methylene diacrylamide as the cross-linker to synthesize the granular profile control agent. Since the process uses bentonite or montmorillonite as the reinforcing agent, and ammonium persulfate or potassium persulfate/potassium metabisulfite as the oxidation-reduction system, ití»s easy to operate and the PH value is adjustable.

Description

technical field [0001] The invention belongs to a preparation method of a copolymerized cross-linked granular profile control agent. Background technique [0002] The traditional chemical water plugging and profile control technology has been greatly restricted in use due to reasons such as high cost, short plugging period, and complicated use. Chinese patent 03111095.9 discloses a composite solid particle profile control agent. The main component of this technology is bentonite, followed by acrylamide, ammonium salt is used as the initiator, and the rest is water. The mineralized water is not easy to degrade, and the cost is low. This technology adopts the homopolymerization of acrylamide, the initiator is ammonium salt, its pH value cannot be adjusted, the polymerization system is alkaline, the system sticks to silk, and the production process is complicated. Contents of the invention [0003] The object of the present invention is to provide a preparation method of a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/42
Inventor 李松棠郑文硕
Owner 李松棠
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