A kind of phenolic resin-acrylamide composite microsphere and its preparation method and application

A technology of acrylamide and composite microspheres, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor stability and unusable oil reservoirs, achieve good thermal stability and swelling, and expand crude oil resources Utilization range, effect of improving water flooding efficiency and crude oil recovery efficiency

Active Publication Date: 2022-05-27
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the stability of commonly used profile control and water shutoff agents, such as polymer gels, foams, silicates, volume-expandable particles, and polymer microspheres, in high-temperature, ultra-high-temperature, and high-salinity formation water reservoirs Poor, cannot be used in such reservoirs

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  • A kind of phenolic resin-acrylamide composite microsphere and its preparation method and application
  • A kind of phenolic resin-acrylamide composite microsphere and its preparation method and application
  • A kind of phenolic resin-acrylamide composite microsphere and its preparation method and application

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Embodiment 1

[0040] This embodiment provides a preparation method of phenolic resin-acrylamide composite microspheres, which comprises the following steps:

[0041] S1, the Span 80 (Span80) and the Tween 80 (Tween80) composite emulsifier with an HLB value of 5 are placed in white oil and stirred with a magnetic stirrer until clear and transparent to obtain an oil phase to obtain an oil phase, wherein, Span 80 and The mass of the Tween 80 complex emulsifier is 8% of the total mass of the oil phase.

[0042] S2. Dissolve acrylamide (AM), water-soluble phenolic resin (PF), potassium persulfate (KPS), N,N'-methylenebisacrylamide (NMBA) in an appropriate amount of water, and add hydrochloric acid (10% , w / w) adjust pH, obtain the water phase that pH value is 5.01; Wherein, the mass ratio of water phase and oil phase is 1:2; In addition, the mass ratio of acrylamide and water-soluble phenolic resin is 5:3; The mass of potassium sulfate is 0.1% of acrylamide; the mass of N'-methylenebisacrylamid...

Embodiment 2

[0045] This embodiment provides a preparation method of phenolic resin-acrylamide composite microspheres, which comprises the following steps:

[0046] S1, the Span 80 (Span80) and the Tween 80 (Tween80) composite emulsifier with an HLB value of 4 are placed in white oil and stirred with a magnetic stirrer until clear and transparent to obtain an oil phase and obtain an oil phase, wherein, Span 80 and The mass of the Tween 80 complex emulsifier is 7% of the total mass of the oil phase.

[0047] S2. Dissolve acrylamide, water-soluble phenolic resin, potassium persulfate, N,N'-methylenebisacrylamide in an appropriate amount of water, and add hydrochloric acid (10%, w / w) to adjust the pH to obtain a pH value of The water phase of 3; wherein, the mass ratio of the water phase to the oil phase is 1:1.5; in addition, the mass ratio of acrylamide and water-soluble phenolic resin is 4:4; the mass of potassium persulfate is 0.05% of acrylamide, N The mass of '-methylenebisacrylamide i...

Embodiment 3

[0050] This embodiment provides a preparation method of phenolic resin-acrylamide composite microspheres, which comprises the following steps:

[0051] S1, the Span 80 (Span80) and the Tween 80 (Tween80) composite emulsifier with an HLB value of 6 are placed in white oil and stirred with a magnetic stirrer until clear and transparent to obtain an oil phase to obtain an oil phase, wherein, Span 80 and The mass of the Tween 80 complex emulsifier is 9% of the total mass of the oil phase.

[0052] S2. Dissolve acrylamide, water-soluble phenolic resin, potassium persulfate, N,N'-methylenebisacrylamide in an appropriate amount of water, and add hydrochloric acid (10%, w / w) to adjust the pH to obtain a pH value of The water phase of 5.5; wherein, the mass ratio of the water phase to the oil phase is 1:2.5; in addition, the mass ratio of acrylamide and water-soluble phenolic resin is 6:2; the mass of potassium persulfate is 0.3% of acrylamide, N The mass of '-methylenebisacrylamide i...

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Abstract

The invention is applicable to the technical field of crude oil exploitation, and provides a phenolic resin-acrylamide composite microsphere and its preparation method and application. The preparation method includes the following steps: placing the emulsifier in white oil for stirring and mixing to obtain an oil phase ; Dissolve acrylamide, phenolic resin, potassium persulfate, and N,N'-methylenebisacrylamide in water, and add hydrochloric acid to adjust the pH to obtain a water phase; under a protective atmosphere, add the water phase to the oil phase for After the reaction, azobisisobutylimidazoline hydrochloride is added for reaction to obtain the phenolic resin-acrylamide composite microspheres. In the present invention, the phenolic resin-acrylamide microspheres are prepared through the self-condensation reaction of the phenolic resin, the self-polymerization reaction of the acrylamide and the crosslinking reaction of the phenolic resin and the acrylamide. In addition, the phenolic resin-acrylamide composite microspheres prepared by the secondary initiation method of the present invention have a "core-shell structure", so they have better thermal stability and swelling performance.

Description

technical field [0001] The invention belongs to the technical field of crude oil exploitation, and in particular relates to a phenolic resin-acrylamide composite microsphere and a preparation method and application thereof. Background technique [0002] my country's oil resources are relatively short. With the rapid development of my country's economy for more than 30 years, the demand for oil has continued to increase. Among the crude oil consumed, the proportion of imported crude oil has reached 60%. In order to make full use of the limited oil resources, the development scale of high-temperature, ultra-high-temperature and high-salinity formation water reservoirs in my country has gradually expanded; at the same time, with the deepening of water flooding, the formation of "water channeling channels" , resulting in the water content of the oil well production fluid being higher than 90%, and the water flooding efficiency is continuously decreasing. The ineffective circulat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/00C08F220/56C08F222/38C09K8/512C09K8/516C09K8/88C09K8/92
CPCC08F283/00C09K8/512C09K8/516C09K8/887C09K8/92C08F220/56C08F222/385
Inventor 王博李擎
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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