Novel yin-yang composite flexible polymer microsphere and preparation method thereof

A flexible polymer and polymer technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of insufficient depth profile control ability and controllability of polymer microspheres, and achieve temperature resistance and salt resistance. Good, high utilization, improve the effect of agglomeration and adsorption capacity

Active Publication Date: 2021-04-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is to solve the problem of insufficient depth profile control ability and controllability of existing polymer microspheres

Method used

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  • Novel yin-yang composite flexible polymer microsphere and preparation method thereof
  • Novel yin-yang composite flexible polymer microsphere and preparation method thereof
  • Novel yin-yang composite flexible polymer microsphere and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Dissolve 25 parts of acrylamide, 0.5 parts of disodium edetate, 1 part of tert-butylacrylamide, and 0.2 parts of methylenebisacrylamide in 30 parts of deionized water to prepare a solution, and adjust the pH value to 6-10 between. Dissolve 0.0125 parts of azobisisobutyl ether hydrochloride in 1 part of deionized water to form an aqueous solution, then add it to the above monomer solution and stir evenly.

[0064] Dissolve 6 parts of sorbitan oleate and 4 parts of fatty alcohol polyoxyethylene ether in 50 parts of 5# white oil, configure an oil solution, add it to the reaction kettle, and stir at a rate of 200r / min. The above aqueous solution was slowly added into the reaction kettle under stirring, and the stirring was continued for 30 minutes. The temperature in the kettle was controlled by a water bath to 20° C., and nitrogen gas was used to remove oxygen.

[0065] Stirring was continued, the temperature was raised in a water bath at a rate of 200 r / min until the tem...

Embodiment 2

[0069] Dissolve 25 parts of acrylamide, 0.5 parts of disodium edetate, 1 part of tert-butylacrylamide, and 0.2 parts of methylenebisacrylamide in 30 parts of deionized water to prepare a solution, and adjust the pH value to 6-10 between. Dissolve 0.0125 parts of azobisisobutyl ether hydrochloride in 1 part of deionized water to form an aqueous solution, then add it to the above monomer solution and stir evenly.

[0070] Dissolve 6 parts of sorbitan oleate and 4 parts of fatty alcohol polyoxyethylene ether in 50 parts of 5# white oil, configure an oil solution, add it to the reaction kettle, and stir at a rate of 200r / min. The above aqueous solution was slowly added into the reaction kettle under stirring, and the stirring was continued for 30 minutes. The temperature in the kettle was controlled by a water bath to 20° C., and nitrogen gas was used to remove oxygen.

[0071] Stirring was continued, the temperature was raised in a water bath at a rate of 200 r / min until the tem...

Embodiment 3

[0075] Dissolve 25 parts of acrylamide, 0.5 parts of disodium edetate, 1 part of tert-butylacrylamide, and 0.2 parts of methylenebisacrylamide in 30 parts of deionized water to prepare a solution, and adjust the pH value to 6-10 between. Dissolve 0.0125 parts of azobisisobutyl ether hydrochloride in 1 part of deionized water to form an aqueous solution, then add it to the above monomer solution and stir evenly.

[0076] Dissolve 6 parts of sorbitan oleate and 4 parts of fatty alcohol polyoxyethylene ether in 50 parts of 5# white oil, configure an oil solution, add it to the reaction kettle, and stir at a rate of 200r / min. The above aqueous solution was slowly added into the reaction kettle under stirring, and the stirring was continued for 30 minutes. The temperature in the kettle was controlled by a water bath to 20° C., and nitrogen gas was used to remove oxygen.

[0077] Stirring was continued, the temperature was raised in a water bath at a rate of 200 r / min until the tem...

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Abstract

The invention relates to a novel yin-yang composite flexible polymer microsphere and a preparation method thereof, mainly solves the problems of insufficient deep profile control capability and controllability of the existing polymer microsphere, and adopts the technical scheme that the yin-yang composite flexible polymer microsphere comprises a polymer I serving as an inner core and a polymer II serving as an outer shell; wherein a molecular chain of the polymer I contains an alkenyl amide structural unit, a cationic etherifying agent structural unit, a nonionic monomer structural unit and a long-acting cross-linking structural unit; and the molecular chain of the polymer II contains an acrylamide structural unit, an anionic monomer structural unit, a nonionic monomer structural unit, a long-acting cross-linking structural unit and a short-term cross-linking structural unit, so that the problems are better solved, and the polymer II can be used for deep profile control in oilfield development.

Description

technical field [0001] The invention relates to a micron-sized core-shell structure anion-yang composite flexible polymer microsphere synthesized by a micro-suspension polymerization method. Specifically, it relates to a micron-sized anion-cation composite flexible polymer microsphere, the cationic core of which is obtained by treating the non-ionic surface with a cationic etherification agent, and the anionic shell is degradable, and can be used as a depth profile control agent in tertiary oil recovery. Background technique [0002] Petroleum is the blood of modern industry, an important source of energy in modern society, and plays a vital role in economic development. At present, my country's dependence on imports of crude oil remains high, but domestic oil fields are facing a series of problems due to long-term development, and production is gradually declining, which seriously restricts the national energy strategy and security. After long-term water injection producti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/54C08F222/38C08F8/44C08F265/10C08F220/58C08F222/20C09K8/512
CPCC08F8/44C08F220/56C08F265/10C09K8/512C09K8/5083C08F220/54C08F222/385
Inventor 苏智青李应成沙鸥夏燕敏孙慧许汇朱益兴
Owner CHINA PETROLEUM & CHEM CORP
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