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A kind of deblocking agent based on deep eutectic solvent and preparation method thereof

A technology of deep eutectic solvent and plugging remover, applied in chemical instruments and methods, drilling compositions, bulk chemical production, etc., can solve the problem of poor removal effect of barium strontium sulfate scale and limit the application of chelation descaling technology , Excessively dissolved formations and other problems, to achieve the effects of improving plugging removal efficiency, facilitating large-scale production, and increasing dissolution rate

Active Publication Date: 2022-05-17
DONGGUAN UNIV OF TECH
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Acidification and descaling will cause certain corrosion to the equipment, and the removal effect on strontium barium sulfate scale is poor, and repeated acidification will excessively dissolve the formation, resulting in sand production in oil wells
The chelation descaling technology does not corrode the equipment, but the cost of traditional chelating agents is high, and the applicable scale samples are limited, which limits the application of the chelation descaling technology

Method used

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  • A kind of deblocking agent based on deep eutectic solvent and preparation method thereof

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preparation example Construction

[0024] A preparation method based on a novel plug-removing agent of a deep eutectic solvent, comprising the following process steps:

[0025] (1) Design and synthesis of deep eutectic solvent-based plugging remover

[0026] Weigh ammonium chloride and choline chloride (ammonium chloride: choline chloride = 1:1, molar ratio) as hydrogen bond acceptors (HBA); polyaspartic acid (11-13 parts), ethylene dichloride Amine tetramethylene phosphonic acid (5~7 parts), amino trimethylene phosphonic acid (5~7 parts), diglycolamine (2~4 parts), tris(hydroxymethyl)methylglycine (2~3 parts ), glycerin (2-4 parts), trehalose (2-3 parts), and caffeic acid (1-2 parts) are mixed according to the molar ratio to form a hydrogen bond donor (HBD); the hydrogen bond acceptor and the hydrogen bond donor According to a certain ratio (total moles of HBA:total moles of HBD = 1:0.2~10) mixed in a round bottom flask, heated in an oil bath at a temperature of 50~60°C, after the mixture forms a transparent ...

Embodiment 1

[0031] A preparation method based on a novel plug-removing agent of a deep eutectic solvent, comprising the following process steps:

[0032] (1) Design and synthesis of deep eutectic solvent-based plugging remover

[0033] Weigh ammonium chloride and choline chloride (ammonium chloride:choline chloride=1:1, molar ratio) as hydrogen bond acceptors (HBA); polyaspartic acid (11 parts), ethylenediaminetetra Methylenephosphonic acid (5 parts), aminotrimethylene phosphonic acid (5 parts), diglycolamine (2 parts), tris(hydroxymethyl)methylglycine (2 parts), glycerin (2 parts), trehalose (2 parts), caffeic acid (1 part) are mixed as hydrogen bond donor (HBD) according to molar ratio; : 0.2) mixed in a round-bottomed flask, heated in an oil bath at 50°C, after the mixture formed a transparent homogeneous liquid, continued heating and stirring for 4 hours to obtain a deep eutectic solvent-based plugging remover. The synthesized deep eutectic solvent-based plug-removing agent was vacu...

Embodiment 2

[0039] A preparation method based on a novel plug-removing agent of a deep eutectic solvent, comprising the following process steps:

[0040] (1) Design and synthesis of deep eutectic solvent-based plugging remover

[0041] Weigh ammonium chloride and choline chloride (ammonium chloride:choline chloride=1:1, molar ratio) as hydrogen bond acceptors (HBA); polyaspartic acid (13 parts), ethylenediaminetetra Methylenephosphonic acid (7 parts), aminotrimethylene phosphonic acid (7 parts), diglycolamine (4 parts), tris(hydroxymethyl)methylglycine (3 parts), glycerin (4 parts), trehalose (3 parts), caffeic acid (2 parts) are mixed as hydrogen bond donor (HBD) according to molar ratio; : 1) Mix in a round-bottomed flask, heat in an oil bath at a temperature of 50°C, and continue heating and stirring for 4 hours after the mixture forms a transparent homogeneous liquid to obtain a deep eutectic solvent-based plug-removing agent. The synthesized deep eutectic solvent-based plug-removin...

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Abstract

The invention relates to a plug-removing agent based on a deep eutectic solvent and a preparation method thereof, and belongs to the technical field of preparation of novel green plug-removing agents. A plugging removal agent based on a deep eutectic solvent, the plugging agent is composed of a deep eutectic solvent-based plugging agent and a functional aid for plugging removal, wherein the deep eutectic solvent-based plugging agent is formed by a hydrogen bond The acceptor and the hydrogen bond donor are prepared from raw materials with a ratio of 1:0.2 to 10 of the total molar number of hydrogen bond acceptors to the total molar number of hydrogen bond donors, wherein the hydrogen bond acceptor has a molar ratio of 1:1 Composed of ammonium chloride and choline chloride; the hydrogen bond donor is composed of the following components in molar parts: 11-13 parts of polyaspartic acid, 5-7 parts of ethylenediamine tetramethylene phosphonic acid , 5-7 parts of aminotrimethylene phosphonic acid, 2-4 parts of diglycolamine, 2-3 parts of tris(hydroxymethyl)methylglycine, 2-4 parts of glycerin, 2-3 parts of trehalose, 1 part of caffeic acid ~ 2 servings. The deep eutectic solvent-based plug-removing agent provided by the invention has good affinity with metal ions, and can disperse metal ions by using the solvent effect to increase the dissolution rate.

Description

technical field [0001] The invention relates to a plug-removing agent based on a deep eutectic solvent and a preparation method thereof, and belongs to the technical field of preparation of novel green plug-removing agents. Background technique [0002] Oilfield formation water has high salinity, and there are a lot of metal ions and corrosive substances (such as CO 2 , H 2 S, dissolved oxygen and bacteria, etc.), leading to fouling of equipment and pipelines during oil and gas production, which seriously threatens oil field safety. At the same time, under high pressure and low temperature conditions, hydrates are easy to form and grow in oil and gas pipelines, causing pipeline blockage and rupture, and even serious production safety accidents. Therefore, unblocking of oil and gas pipelines is a key technology to prevent accidents in oil fields. [0003] The traditional plugging removal technologies commonly used in oilfields are mainly acidizing and chelating descaling t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/52C09K8/528
CPCC09K8/52C09K8/528Y02P20/54
Inventor 李长平李翔蔡学琴王玉伟
Owner DONGGUAN UNIV OF TECH
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