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Polyacrylamide microgel as well as preparation method and application thereof

A polyacrylamide and acrylamide technology, applied in chemical instruments and methods, drilling compositions and other directions, can solve the problem that polyacrylamide oil displacement agent has small particle size, cannot block large pores in oil reservoirs, and is not suitable for oil reservoirs. and other problems, to achieve the effect of good oil displacement effect, large particle size and reduction of industrial cost

Active Publication Date: 2012-07-04
北京石大万嘉新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The above methods all require multiple steps to obtain the product, the process is complicated, the energy consumption is high, and the particle size of the obtained polyacrylamide oil displacement agent is small, which cannot block the large pores in the oil reservoir, so it is not suitable for long-term water displacement. flooded reservoir

Method used

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  • Polyacrylamide microgel as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 30 parts by weight of Span80 and 300 parts by weight of white oil were mixed at 45° C. to 50° C. to obtain a mixed solution 1, which was cooled to room temperature.

[0026] At room temperature, 15 parts by weight of sodium acrylate, 5 parts by weight of sodium 2-acrylamido-2-methylpropanesulfonate, 55 parts by weight of acrylamide, 1 part by weight of N, N'-methylenebisacrylamide and 1 part by weight Parts of potassium persulfate were mixed with 150 parts by weight of distilled water to obtain mixed solution 2.

[0027] Add mixed solution 2 dropwise to mixed solution 1 at room temperature at a stirring speed of 120 rpm, then raise the temperature to 70°C, stir for 1 hour, stop heating, and continue stirring at this stirring speed for 1 hour to obtain polyacrylamide micro Gel, observed under an electron microscope, the polyacrylamide microgel is spherical, and the particle size is 30-110 microns.

Embodiment 2

[0029] 0.3 parts by weight of Span80 and 40 parts by weight of white oil were mixed at 45° C. to 50° C. to obtain a mixed solution 1, which was cooled to room temperature.

[0030] At room temperature, 2 parts by weight of sodium acrylate, 2 parts by weight of sodium 2-acrylamido-2-methylpropanesulfonate, 6 parts by weight of acrylamide, 0.025 parts by weight of N, N'-methylenebisacrylamide and 0.1 parts by weight Parts of ammonium persulfate were mixed with 20 parts by weight of distilled water to obtain mixed solution 2.

[0031] Add the mixed solution 2 dropwise to the mixed solution 1 at room temperature at a stirring speed of 70 rpm, then raise the temperature to 70°C, stir for 1 hour, stop heating, and continue stirring at the stirring speed for 1 hour to obtain polyacrylamide micro Gel, observed under an electron microscope, the polyacrylamide microgel is spherical, and the particle size is 30-150 microns.

Embodiment 3

[0033] 6 parts by weight of Span80 and 120 parts by weight of white oil were mixed at 80° C. to 100° C. to obtain a mixed solution 1, which was cooled to room temperature.

[0034] At room temperature, mix 15 parts by weight of sodium acrylate, 2 parts by weight of N-vinylpyrrolidone, 6 parts by weight of acrylamide, 0.05 parts by weight of N, N'-methylenebisacrylamide and 1 part by weight of potassium persulfate with 40 parts by weight of distilled water Mix to obtain mixed solution 2.

[0035] Add mixed solution 2 dropwise to mixed solution 1 at room temperature at a stirring speed of 80 rpm, then raise the temperature to 80°C, stir for 1 hour, stop heating, and continue stirring at this stirring speed for 1 hour to obtain polyacrylamide micro Gel, observed under an electron microscope, the polyacrylamide microgel is spherical, and the particle size is 30-150 microns.

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Abstract

The invention discloses a polyacrylamide microgel as well as a preparation method and application thereof. The particle size of the polyacrylamide microgel is 30-150 micrometers, acrylamide, sodium acrylate, N,N'-bisacrylamide, 2-acrylamide-2-methylpropanesulfonic acid sodium, styrenesulfonate and the like serve as polymerized monomers, white oil and the like serve as disperse phases, and the polymerized monomers and the disperse phases are subjected to thermal initiation suspension polymerization to obtain the polyacrylamide microgel. The polyacrylamide microgel synthetized by the method canbe directly injected into an oil layer without being processed and has a good plugging effect.

Description

technical field [0001] The invention relates to a polyacrylamide microgel, a preparation method thereof and an application as an oil field control and displacement material. Background technique [0002] It is usually called primary oil recovery to use the energy of the oil layer to extract oil; to inject water and gas into the oil layer to supplement energy to the oil layer to extract oil is called secondary oil recovery; and to use chemical substances to improve the performance of oil, gas, water and rocks. , to extract more oil, known as tertiary oil recovery. Tertiary oil recovery mainly includes: surfactant injection, polymer thickened water injection, alkali water flooding, carbon dioxide injection, alkali plus polymer flooding, inert gas flooding, etc. Polymer flooding is a large category of chemical flooding. In the tertiary oil recovery technology, the use of polymer flooding can greatly increase the recovery factor. At present, the most widely used polymer oil-di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/06C08F220/58C08F222/38C08F226/10C08J3/075C09K8/588
Inventor 梁玉彪崔国友吴新敏
Owner 北京石大万嘉新材料科技有限公司
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