Phenolic resin-acrylamide composite microsphere as well as preparation method and application thereof

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 unusable oil reservoirs and poor stability, 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: 2021-03-12
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Phenolic resin-acrylamide composite microsphere as well as preparation method and application thereof
  • Phenolic resin-acrylamide composite microsphere as well as preparation method and application thereof
  • Phenolic resin-acrylamide composite microsphere as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

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

[0041] S1, put Span 80 (Span80) and Tween 80 (Tween80) composite emulsifier with an HLB value of 5 in white oil and stir with a magnetic stirrer until the oil phase is clear and transparent to obtain an oil phase, wherein Span 80 and The quality of the Tween 80 composite emulsifier accounts for 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 the pH to obtain a water phase with a pH value of 5.01; wherein the mass ratio of the water phase to the oil phase is 1:2; in addition, the mass ratio of acrylamide and water-soluble phenolic resin is 5:3; The quality of potassium sulfate is 0.1% of acrylamide; the quality of N'-methylene...

Embodiment 2

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

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

[0047] S2. Dissolve acrylamide, water-soluble phenolic resin, potassium persulfate, and 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 3 water phase; wherein, the mass ratio of water phase to oil phase is 1:1.5; in addition, the mass ratio of acrylamide and water-soluble phenolic resin is 4:4; the quality of potassium persulfate is 0.05% of acrylamide, N The mass of '-methylenebisacrylamide is 0.1% of acrylamide.

[0...

Embodiment 3

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

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

[0052] S2. Dissolve acrylamide, water-soluble phenolic resin, potassium persulfate, and 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 5.5 water phase; wherein, the mass ratio of water phase to oil phase is 1:2.5; in addition, the mass ratio of acrylamide and water-soluble phenolic resin is 6:2; the quality of potassium persulfate is 0.3% of acrylamide, N The mass of '-methylenebisacrylamide is 0.5% of acrylamide.

...

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Abstract

The invention is applicable to the technical field of crude oil exploitation, and provides phenolic resin-acrylamide composite microspheres as well as a preparation method and application thereof. Thepreparation method comprises the following steps: putting an emulsifier into white oil, and stirring and mixing to obtain an oil phase; dissolving acrylamide, phenolic resin, potassium persulfate andN, N '-methylene bisacrylamide in water, and adding hydrochloric acid to adjust the pH value, thereby obtaining a water phase; dropwise adding the water phase into the oil phase for reaction in a protective atmosphere, and then adding azodiisobutylimidazoline hydrochloride for reaction, so as to obtain the phenolic resin-acrylamide composite microspheres. The phenolic resin-acrylamide microspheres are prepared through a self polycondensation reaction of phenolic resin, a self polymerization reaction of acrylamide and a cross-linking reaction of phenolic resin and acrylamide. In addition, thephenolic resin-acrylamide composite microspheres prepared by a secondary initiation method have a 'core-shell structure', so that the phenolic resin-acrylamide composite microspheres have better thermal stability and swelling property.

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 continues to increase. Among the consumed crude oil, the proportion of imported crude oil has reached 60%. In order to make full use of 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" in the reservoir , leading to the water cut of the oil well production fluid being higher than 90%, and the water flooding efficiency is continuously reduced. And the ineffective cir...

Claims

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Application Information

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Patent Type & Authority Applications(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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