Anti-high-salinity comb-type micro-segmented hydrophobic associated polymer and preparation method thereof

A hydrophobic association, polymer technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of large reduction in viscosity, low viscosity, and large reduction in viscosity, and achieve enhanced viscosity enhancement and wide application. Foreground, length increase effect

Inactive Publication Date: 2017-02-15
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, extensive research on hydrophobic association polymers has been carried out at home and abroad, and certain achievements have been made, such as "A comb polymer emulsion and preparation method for drilling fluid" with application number 201310511262.X, and application number 201511018952.7 The polymers disclosed in "A Hydrophobic Associating Polymer and Its Preparation Method" and "A Fluorine-Containing Double-tailed Hydrophobic Associating Polymer and Its Preparation Method" with application number 201510939687.X all have certain temperature and resistance properties. Salt function, but the current hydrophobic association polymers also have certain defects: in water with high salinity, especially in water with high hardness, the viscosity decreases greatly; with the increase of temperature, the viscosity of the polymer decreases more rapidly Fast, low viscosity; under the dual conditions of high temperature and high salt, the viscosity drops a lot, and the viscosity is low

Method used

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  • Anti-high-salinity comb-type micro-segmented hydrophobic associated polymer and preparation method thereof
  • Anti-high-salinity comb-type micro-segmented hydrophobic associated polymer and preparation method thereof
  • Anti-high-salinity comb-type micro-segmented hydrophobic associated polymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation of a high-salt comb-type micro-block hydrophobic association polymer:

[0035] Weigh 10.625g of acrylamide (AM) and 1.875g of acrylic acid (AA), add distilled water and stir evenly, adjust the pH to 7; add 0.1g of N-phenylethyl-N-tetradecylmethacrylamide (PETMAM) , 0.4g nonionic surfactant monomer (b is 20), 0.01g cationic hydrophobic monomer (R number is 14) and 0.2g sodium dodecyl sulfate (SDS), add a certain amount of distilled water to make the solution volume reach 50mL, stir until the solution is clear and transparent; blow nitrogen gas for 15min to remove dissolved oxygen in the water; add initiator Irgacure 2959, place it under a photoinitiator, and react for 4h.

Embodiment 2

[0037] Weigh 8.75g of acrylamide (AM) and 3.75g of acrylic acid (AA), add distilled water and stir evenly, adjust the pH to 7; add 0.1g of N-phenylethyl-N-tetradecylmethacrylamide (PETMAM) , 0.4g nonionic surfactant monomer (b is 20), 0.01g cationic hydrophobic monomer (R number is 14) and 0.2g sodium dodecyl sulfate (SDS), add a certain amount of distilled water to make the solution volume reach 50mL, stir until the solution is clear and transparent; blow nitrogen gas for 15min to remove dissolved oxygen in the water; add initiator Irgacure 2959, place it under a photoinitiator, and react for 4h.

Embodiment 3

[0039]Weigh 10g of acrylamide (AM) and 2.5g of acrylic acid (AA), add distilled water and stir evenly, and adjust the pH value to 7; add 0.1g of N-phenylethyl-N-tetradecylmethacrylamide (PETMAM), 0.4g nonionic surfactant monomer (b is 20), 0.01g cationic hydrophobic monomer (R number is 14) and 0.2g sodium dodecyl sulfate (SDS), add a certain amount of distilled water to make the solution volume reach 50mL , stir until the solution is clear and transparent; pass nitrogen gas for 15 minutes to remove dissolved oxygen in water; add initiator Irgacure 2959, place it under a photoinitiator, and react for 4 hours.

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Abstract

The invention discloses an anti-high-salinity comb-type micro-segmented hydrophobic associated polymer and a preparation method thereof. The preparation method includes: adopting a mixed micelle polymerization method to prepare the comb-type micro-segmented hydrophobic associated polymer: adding a surfactant (SDS), a cationic hydrophobic monomer and a nonionic surface activity monomer into a water solution containing water-soluble monomers like acrylamide and acrylic acid to form mixed micelle; solubilizing a double-tail hydrophobic monomer N-aryl-N-alkyl(methyl) acrylamide(PEMAM) in the mixed micelle; copolymerizing the hydrophobic monomer and the water-soluble monomer by means of photo-initiation to obtain the comb-type micro-segmented hydrophobic associated polymer. The polymer has a comb-type structure, so that temperature resistance, tackifying performance and salt resistance of the polymer are improved; a micro-segmented hydrophobic structure endows the polymer with excellent salt resistance and tackifying performance, and consumption of the polymer can be effectively lowered; the temperature-resistant salt-resistant polymer which can be used for chemical flooding of oil fields is prepared by combining advantages of the comb-type structure and the micro-segmented hydrophobic structure.

Description

technical field [0001] The invention belongs to the technical field of oilfield chemistry, and in particular relates to a high-salt-resistant comb-type micro-block hydrophobic association polymer and a preparation method thereof for enhancing oil recovery. Background technique [0002] With the continuous development of domestic oil extraction, many oil fields have entered the stage of secondary or even tertiary oil recovery, and the reservoir conditions that need to be faced in oil recovery operations are getting worse and worse. Therefore, how to effectively solve the problem of high temperature and high salinity in tertiary oil recovery The influence on polymer properties has become one of the problems that must be paid great attention to and solved in time in the field of EOR. The polymers currently used in oil recovery operations, such as polyacrylamide and partially hydrolyzed polyacrylamide, are difficult to meet the requirements of polymer flooding under high tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F293/00C08F220/56C08F220/06C08F220/60C08F220/54C08F2/26C08F2/28C08F2/48C09K8/588
CPCC08F2/26C08F2/28C08F2/48C08F220/56C08F293/00C09K8/588
Inventor 姜峰蒲万芬赵田红唐艳丽贺艳艳
Owner SOUTHWEST PETROLEUM UNIV
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