Agent for purifying gas wells and draining and preparation method thereof

A chemical and liquid drainage technology, which is applied in chemical instruments and methods, earthwork drilling, wellbore/well components, etc., can solve problems such as insufficient efficiency, increased wellbore blockage, and increased viscosity of produced fluid, etc., to achieve Purification adapts to a wide range, improves purification efficiency, and accelerates the effect of purification speed

Inactive Publication Date: 2018-02-09
成都华阳兴华化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wellbore is usually made of special steel. When the gas well is developed to the middle and later stages, the scale, corrosion, sediment, oil, organic accumulation, emulsion, etc. in the wellbore will accumulate more and more, resulting in the cross-sectional area of ​​the wellbore pipe diameter Unfavorable consequences such as the decline of the gas flow rate, the blockage of the pipe shoe part and the perforation part, and the increase of the viscosity of the produced fluid greatly increase the burden on the gas well, which may cause abnormal production reduction of the gas well and cannot be recovered
[0003] In order to solve the problem of increased wellbore clogging due to foreign matter, the plugging removal process of injecting plugging remover has been developed. If there is scaling pollution, add acid plugging remover, organic accumulation pollution, add organic plugging remover, etc. After that, Gradually develop composite plugging remover and its on-site technology and have achieved certain results, making a certain contribution to maintaining the stable production of gas wells in the middle and late stages
[0004] However, the existing plugging agen

Method used

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  • Agent for purifying gas wells and draining and preparation method thereof
  • Agent for purifying gas wells and draining and preparation method thereof
  • Agent for purifying gas wells and draining and preparation method thereof

Examples

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preparation example Construction

[0026] This embodiment also provides a method for preparing the above-mentioned medicament for gas well purification and liquid drainage, which includes:

[0027] Mix hydrocarbyl methylamino carboxylic acid with water, heat to 45-55°C, mix with polyoxyethylene ether, perfluoroalkylammonium chloride and 2,5-alkylpyrazine under stirring conditions, and stir at constant temperature After 20 to 40 minutes, mix with ethylene oxide and propylene oxide copolymer, dissolve completely and cool down.

[0028] Further, the mixing process of the materials is carried out under stirring, so that they can be mixed quickly and uniformly in a short time, and the stirring rate is 30-60r / min, or 35-55r / min, or 40-50r / min. / min, or 42~48r / min, or 44~46r / min.

[0029] Further, in the process of mixing the materials, first mix the hydrocarbyl methylamino carboxylic acid with water, heat it to a constant temperature of 45-55°C, mix it with polyoxyethylene ether under the condition of stirring, and ...

Embodiment 1

[0032] This embodiment provides a medicament for gas well purification and liquid drainage, which includes:

[0033] Hydrocarbyl methylamino carboxylic acid 30Kg, fatty alcohol polyoxyethylene ether 20Kg, ethylene oxide propylene oxide copolymer 5Kg, perfluoroalkylammonium chloride 1Kg, 2,5-alkylpyrazine 0.1Kg.

[0034] Among them, the hydrocarbyl methylamino carboxylic acid is C8H17-N(CH3)-COOH; fatty alcohol polyoxyethylene ether, the degree of polymerization is 2; the molecular weight of ethylene oxide propylene oxide copolymer is 2000g / mol; perfluoroalkyl chloride Ammonium chloride is C8H17-NH3+Cl-: 2,5-alkylpyrazine is:

[0035] The preparation method of this medicament comprises:

[0036] Mix hydrocarbyl methylamino carboxylic acid with water, heat to a constant temperature of 45°C, then mix with fatty alcohol polyoxyethylene ether, perfluoroalkylammonium chloride and 2,5-alkylpyrazine under stirring at 60r / min, After stirring at a constant temperature for 25 minutes...

Embodiment 2

[0038] This embodiment provides a medicament for gas well purification and liquid drainage, which includes:

[0039] Hydrocarbyl methylamino carboxylic acid 40Kg, fatty alcohol polyoxyethylene ether 15Kg, ethylene oxide propylene oxide copolymer 15Kg, perfluoroalkylammonium chloride 0.3Kg, 2,5-alkylpyrazine 1.5Kg.

[0040] Among them, hydrocarbyl methylamino carboxylic acid is obtained by mixing CH3-N(CH3)-COOH and C3H7-N(CH3)-COOH according to the mass ratio of 1:1; fatty alcohol polyoxyethylene ether, the degree of polymerization is 5; ethylene oxide The molecular weight of the alkylene oxide copolymer is 200g / mol; the perfluoroalkylammonium chloride is (C14H29)2-NH2+Cl-: 2,5-alkylpyrazine is:

[0041] The preparation method of this medicament comprises:

[0042] Mix hydrocarbyl methylamino carboxylic acid with water, heat to a constant temperature of 55°C, then mix with fatty alcohol polyoxyethylene ether, perfluoroalkylammonium chloride and 2,5-alkylpyrazine under stirr...

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Abstract

The invention provides an agent for purifying and draining gas wells and a preparation method thereof, and relates to the field of gas well purification. The agent comprises, by weight, 30 to 80 partsof alkyl methylamino carboxylic acid, 5 to 20 parts of polyoxyethylene ether, 5 to 20 parts of ethylene oxide-propylene oxide copolymer, 0.1-1 part of perfluoroalkyl ammonium chloride and 0.1 to 2 parts of 2,5-alkyl pyrazine. The preparation method comprises the following steps: mixing the alkyl methylamino carboxylic acid with water, heating to 45-55 DEG C, under the conditions of stirring at the constant temperature of 45-55 DEG C, mixing with the polyoxyethylene ether, the perfluoroalkyl ammonium chloride and the 2,5-alkyl pyrazine, stirring at the constant temperature for 20 to 40 minutes, mixing with the ethylene oxide-propylene oxide copolymer, completely dissolving and cooling. The agent has strong purification efficiency, wide purification adaptability and strong foaming capability, and effectively improves the purification effect of the wellbores of the gas wells.

Description

technical field [0001] The invention relates to the field of gas well purification, in particular to a medicament for gas well purification and liquid drainage and a preparation method thereof. Background technique [0002] The natural gas extraction process is a resource extraction mode guided by a columnar wellbore. The wellbore is the most important part of the extraction device, which can connect the natural gas reservoir with the surface pipeline to achieve the purpose of natural gas extraction. The wellbore is usually made of special steel. When the gas well is developed to the middle and later stages, the scale, corrosion, sediment, oil, organic accumulation, emulsion, etc. in the wellbore will accumulate more and more, resulting in the cross-sectional area of ​​the wellbore pipe diameter Unfavorable consequences such as drop, blockage of pipe shoes and perforation sites, and increased viscosity of produced fluids have greatly increased the burden on the gas well, whi...

Claims

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Application Information

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IPC IPC(8): C09K8/524C09K8/54C09K8/58C09K8/584C09K8/588
Inventor 曹焕尧李祖友郭柏序鲁光亮罗凯蒋德伟蒋春贵王浩儒
Owner 成都华阳兴华化工有限公司
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