Gas well foaming agent composition as well as preparation method and application thereof

A foam discharge agent and composition technology, applied in the field of gas well foam discharge agent composition, can solve the problems of gas well production reduction, excessive fluid accumulation, stop spraying, etc., and achieve the effects of increasing viscosity, high interface activity, and increasing stability

Active Publication Date: 2020-02-14
DONGYING SPRING PETROLEUM ENG TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the existing gas wells tend to accumulate too much fluid during the development process, resulting in reduced production or even stop blowout of the gas wells, the present invention provides a gas well with good temperature and salt resistance, foaming performance and high-efficiency carrying capacity. Liquid-capable gas well foaming agent composition

Method used

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  • Gas well foaming agent composition as well as preparation method and application thereof
  • Gas well foaming agent composition as well as preparation method and application thereof
  • Gas well foaming agent composition as well as preparation method and application thereof

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preparation example Construction

[0063] A method for preparing a foam discharge agent composition for gas recovery from temperature-resistant and salt-resistant drainage, comprising the following steps:

[0064] (1)CO 2 / N 2 Synthesis of Switch Salt Tolerance Responsive Tertiary Amines

[0065] a. Add R to the three-necked flask 3 -Br and H(OCH 2 CH 2 ) b OH, in N 2 React under protection, obtain alkyl polyoxyethylene ether base alcohol intermediate;

[0066] b. Mix the alkyl polyoxyethylene ether-based alcohol intermediate and the sulfonating agent in a molar ratio of 3: (1-2), and then react with dimethylamine in a hydrothermal reactor at a reaction temperature of 150 React at ~180°C for 7-9 hours to obtain the target product, alkylpolyoxyethylene ether-based tertiary amine, and the sulfonating reagent is halogenated sulfonic acid and its salt.

[0067] (2) Synthesis of polymer AM-NVP-AS

[0068] The synthesis of the polymer adopts the method of free radical polymerization, and the raw materials ar...

Embodiment 1

[0075] The preparation of composition 1, preparation steps:

[0076] (1) Synthesis of salt-tolerant responsive tertiary amines

[0077] a. Add 13gC to the three-necked flask 12 h 25 Br and 22g ethylene glycol react to obtain the alkyl polyoxyethylene ether alcohol intermediate;

[0078] b. React 12g of alkyl polyoxyethylene ether-based alcohol intermediates with 35g of dimethylamine aqueous solution in a hydrothermal reactor, and react at a reaction temperature of about 165°C for 8 hours to obtain the target product dodecyl polyoxyethylene Oxyethylene ether based tertiary amine.

[0079] (2) Preparation of foam discharge agent composition

[0080] Dissolve lauryl polyoxyethylene ether-based tertiary amine, anionic surfactant, and self-synthesized polymer AM-NVP-AS in a mineralization degree of 50,000 mg / L and a pH of 7 according to a mass ratio of 1:1:1. In the mixture of ethanol and water, mix evenly to obtain the foam release agent composition 1, and the generated foam ...

Embodiment 2

[0082] The preparation of composition 2, preparation steps:

[0083] (1) Synthesis of salt-tolerant responsive tertiary amines

[0084] a. Add 10gC to the three-necked flask 10 h 21 Br and 22g ethylene glycol react to obtain the alkyl polyoxyethylene ether alcohol intermediate;

[0085] b. React 12g of alkyl polyoxyethylene ether-based alcohol intermediates with 38g of dimethylamine aqueous solution in a hydrothermal reactor, and react at a reaction temperature of about 165°C for 7.5 hours to obtain the target product dodecylpolyethylene glycol Oxyethylene ether based tertiary amine.

[0086] (2) Preparation of foam discharge agent composition

[0087] Dissolve dedecyl polyoxyethylene ether-based tertiary amine, anionic surfactant, and self-synthesized polymer AM-NVP-AS in ethanol with a salinity of 80,000 mg / L and a pH of 7 according to a mass ratio of 2:1:1 In the mixed solution with water, mix evenly to obtain the foam release agent composition 2, and the generated foa...

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Abstract

The invention discloses a gas well foaming agent composition as well as a preparation method and application thereof, and belongs to the technical field of oil and gas field chemical agents. The technical problems that in the prior art, a foaming agent is poor in foam stability, water carrying capacity and the like in the drainage gas recovery process under the conditions of high temperature, highsalinity and high salinity are mainly solved. The composition comprises the following components: an anionic surfactant with the mass fraction of 40%; a self-made CO2/N2 switch salt-tolerant responsetype tertiary amine the mass fraction of which is 45%; a self-made polymer AM-NVP-AS with a mass fraction of 10%; a foam stabilizer with a mass fraction of 5% and ethanol. The foaming agent disclosedby the invention has responsiveness in high-temperature high-salinity formation water; the foaming agent has the advantages of good foaming performance, long half-life period, high liquid carrying capacity and the like, and well solves the drainage gas recovery problem of high-temperature high-salt gas wells. Raw materials are low in price, easy to obtain, low in toxicity and irritation, and thecomposition is simple to produce and prepare, and can be applied to the drainage gas recovery industry of the gas well.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field chemical agents, and in particular relates to a gas well foaming agent composition, a preparation method and an application thereof. Background technique [0002] With the continuous development of gas fields, most of the gas wells in China have experienced wellbore fluid accumulation in recent years. Fluid accumulation in the wellbore will increase the back pressure in the gas well, reduce the gas production rate, and even kill the gas well, seriously affecting the development and production of the gas field. To solve this problem, techniques such as foam drainage gas recovery, optimized string drainage gas recovery, rod pump drainage gas recovery, and gas lift drainage gas recovery have been widely used. Among many drainage gas recovery technologies, foam drainage gas recovery has the advantages of simple operation, low cost, and quick effect, and the number of wells used accounts for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C09K8/588
CPCC09K8/584C09K8/588
Inventor 韩庆建王文栋孙春同孙霜青任平平胡松青孙志强孙新元
Owner DONGYING SPRING PETROLEUM ENG TECH
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