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A kind of gas well foam discharge agent composition, 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, improving salt resistance, and increasing stability

Active Publication Date: 2021-10-26
DONGYING SPRING PETROLEUM ENG TECH +1
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  • Summary
  • 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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  • A kind of gas well foam discharge agent composition, preparation method and application thereof
  • A kind of gas well foam discharge agent composition, preparation method and application thereof
  • A kind of gas well foam discharge agent composition, 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 diethylene glycol react to obtain the alkyl polyoxyethylene ether alcohol intermediate;

[0078] b. React 12g of alkyl polyoxyethylene ether-based alcohol intermediate, sulfonating reagent and 35g of dimethylamine aqueous solution in a hydrothermal reaction kettle, and react at a reaction temperature of about 165°C for 8 hours to obtain the target product 12 Alkyl polyoxyethylene ether-based tertiary amine, the sulfonating agent is halogenated sulfonic acid and its salt.

[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,...

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 diethylene glycol react to obtain the alkyl polyoxyethylene ether alcohol intermediate;

[0085] b. React 12g of alkyl polyoxyethylene ether-based alcohol intermediate, sulfonating reagent and 38g of dimethylamine aqueous solution in a hydrothermal reaction kettle, and react at a reaction temperature of about 165°C for 7.5 hours to obtain the target product 12 Alkyl polyoxyethylene ether-based tertiary amine, the sulfonating agent is halogenated sulfonic acid and its salt.

[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, ...

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Abstract

The invention discloses a gas well foaming agent composition, a preparation method and an application thereof, and belongs to the technical field of oil and gas field chemical agents. It mainly solves the technical problems such as foam stability and poor water-carrying capacity of the foam drainage agent in the prior art in the process of drainage and gas recovery under the condition of high temperature, high salt and high salinity. The composition includes the following components: an anionic surfactant with a mass fraction of 40%; a self-made CO with a mass fraction of 45% 2 / N 2 Switch salt-tolerant responsive tertiary amine; self-made polymer AM‑NVP‑AS with a mass fraction of 10%; foam stabilizer and ethanol with a mass fraction of 5%. The foam discharge agent of the present invention not only has responsiveness in high-temperature, high-salinity formation water, but also has good foaming performance, long half-life, and large liquid-carrying capacity, which better solves the problem of drainage and gas recovery of high-temperature and high-salt gas wells The problem is that the raw material of the present invention is cheap and easy to obtain. The raw material has low toxicity and low irritation, simple production and preparation, and can be applied to the gas well drainage and gas recovery industry.

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 Patents(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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