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Blocking remover based on deep eutectic solvent and preparation method thereof

A technology of deep eutectic solvent and plugging agent, which is applied in chemical instruments and methods, drilling compositions, bulk chemical production, etc., and can solve the problem of limited application of chelation descaling technology and poor removal effect of strontium barium sulfate scale , high cost of chelating agents, and achieve the effects of improving plugging removal efficiency, facilitating large-scale production, and reducing production costs

Active Publication Date: 2020-05-29
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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  • Blocking remover 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 blocking remover based on a deep eutectic solvent and a preparation method thereof, and belongs to the technical field of preparation of novel green blocking removers. According to the blocking remover based on the deep eutectic solvent, the blocking remover is composed of a deep eutectic solvent-based blocking remover and a blocking removing functional additive, whereinthe deep eutectic solvent-based blocking remover is prepared from a hydrogen bond acceptor and a hydrogen bond donor according to the ratio of the total mole number of the hydrogen bond acceptor to the total mole number of the hydrogen bond donor of 1:(0.2-10), and the hydrogen bond acceptor is composed of ammonium chloride and choline chloride in a mole ratio of 1:1; the hydrogen bond donor is prepared from the following components in parts by mole: 11-13 parts of polyaspartic acid, 5-7 parts of ethylenediamine tetramethylene phosphonic acid, 5-7 parts of amino trimethylene phosphonic acid,2-4 parts of diglycolamine, 2-3 parts of tris(hydroxymethyl)methylglycine, 2-4 parts of glycerol, 2-3 parts of trehalose and 1-2 parts of caffeic acid. The deep eutectic solvent-based blocking removerprovided by the invention has good affinity with metal ions, the metal ions can be dispersed by utilizing a solvent effect, and the corrosion rate is increased.

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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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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