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Nano self-aggregation system for profile control and its preparation method

A self-aggregation and system technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as poor control and displacement effects, increased demand for profile control, and impact on displacement effects, etc., achieving low cost and high stability Good results

Inactive Publication Date: 2018-03-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when most reservoirs enter the middle and late stages of development, the heterogeneity of the reservoirs will have an increasingly serious impact on the displacement effects of water flooding and chemical flooding. The demand for profile control in high-temperature and high-salt reservoirs increases, and the effect of conventional control and flooding becomes worse. Reservoirs put forward higher requirements for profile control technology

Method used

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Experimental program
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Effect test

preparation example Construction

[0039] The present invention also provides a preparation method of the nano self-aggregation system for profile control, comprising the following steps:

[0040] (1) Add amphoteric ionic liquid type surfactant in water and stir well, then add anionic surfactant until stir evenly;

[0041] (2) At 35-80°C, add inorganic salt to the solution in (1) and stir for at least 30 minutes;

[0042] (3) Cool the solution in (2) to room temperature, add small molecule polyols therein, and stir for at least 10 minutes;

[0043] (4) The solution in step (3) was left to stand at room temperature for more than 24 hours.

[0044] In one embodiment of the present invention, the stirring speed in steps (1) to (2) is 100-500 rpm, preferably 100-300 rpm.

[0045] In one embodiment of the present invention, the stirring speed in step (3) is 600-1000 rpm, preferably 800-1000 rpm.

[0046] In one embodiment of the present invention, in step (4), the solution is allowed to stand for 30-90 hours, pre...

Embodiment 1

[0057] Preparation of nano self-aggregation system for profile control:

[0058] (1) Add 8kg N-dodecyl-N'-carboxymethylimidazolium inner salt in 100kg distilled water and stir evenly at 300rpm, then add 6kg sodium dodecylbenzenesulfonate and stir at 300rpm until uniform;

[0059] (2) At 65° C., add 4 kg of sodium chloride to the solution in (1) and stir at 300 rpm for 30 minutes;

[0060] (3) Cool the solution in (2) to room temperature, add 2kg of ethylene glycol therein, and stir for 10 minutes at 1000rpm;

[0061] (4) The solution in step (3) was left to stand at room temperature for 24 hours to obtain a nano self-aggregation system for profile control.

Embodiment 2

[0063] Preparation of nano self-aggregation system for profile control:

[0064] (1) Add 4kg N-dodecyl-N'-carboxymethylimidazolium inner salt in 100kg distilled water and stir evenly at 300rpm, then add 2kg sodium dodecylbenzenesulfonate and stir at 300rpm until uniform;

[0065] (2) At 50°C, add 1 kg of sodium chloride to the solution in (1) and stir at 300 rpm for 30 minutes;

[0066] (3) Cool the solution in (2) to room temperature, add 0.1 kg of ethylene glycol therein, and stir for 10 minutes at 1000 rpm;

[0067] (4) The solution in step (3) was left to stand at room temperature for 24 hours to obtain a nano self-aggregation system for profile control.

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Abstract

The invention discloses a nano-grade self-aggregation system used in profile control. The system is characterized in that the system is composed of the following components, by weight: (a) 1-30 parts of an amphoteric ionic liquid surfactant; (b) 0.5-25 parts of an anionic surfactant; (c) 0.1-15 parts of an alkali metal inorganic salt; (d) 0.05-10 parts of small-molecular polyol; and (e) 100-400 parts of water. The invention also provides a preparation method of the nano-grade self-aggregation system used in profile control.

Description

technical field [0001] The invention relates to a nano self-aggregation system for profile control and a preparation method thereof. Background technique [0002] As an important technical measure to improve the development effect of water flooding, control water and stabilize oil production to achieve stable production of reservoirs, profile control technology can economically and effectively adjust and improve the heterogeneity of reservoirs. made an important contribution. However, when most reservoirs enter the middle and late stages of development, the heterogeneity of the reservoirs will have an increasingly serious impact on the displacement effects of water flooding and chemical flooding. The demand for profile control in high-temperature and high-salt reservoirs has increased, and the effect of conventional control and flooding has become worse. The reservoir has put forward higher requirements for profile control technology. The self-aggregation behavior of nanom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/506
CPCC09K8/506
Inventor 汪庐山王涛靳彦欣胡秋平徐鹏宋时权付琛韦雪朱妍婷党娟华
Owner CHINA PETROLEUM & CHEM CORP