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High-temperature foaming agent and preparation method thereof

A high-temperature foaming agent and high-temperature technology, applied in chemical instruments and methods, earth drilling, mining fluids, etc., to achieve the effects of good biodegradability, good solubility, and good foam stability

Active Publication Date: 2012-09-19
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, there are very few high-temperature-resistant foaming agents that can be applied to steam stimulation (temperature greater than 280°C) or steam flooding (temperature greater than 300°C), and the key problem that restricts the application of this technology to steam stimulation or steam flooding is foam. High temperature resistance of the agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 1. Preparation of sodium α-olefin sulfonate

[0049] First, add 20wt% α-olefins (wherein C14α-olefins account for 40wt%, and C16α-olefins account for 60wt%) in the reactor, stir, heat up to 45°C, and then feed 15wt% SO 3 Carry out the sulfonation reaction, and when the reaction is complete and the temperature no longer rises, age for 45 minutes and keep the temperature at 45°C-50°C to obtain α-olefin sulfonic acid;

[0050] Slowly add a mass concentration of 20% sodium hydroxide solution to the aged product (that is, α-olefin sulfonic acid) for neutralization reaction. During the reaction, the temperature is controlled not to exceed 55°C. After the reaction is completed, stir for 30 minutes to obtain α - sodium olefin sulfonate intermediate (partially converted sodium α-olefin sulfonate);

[0051] Transfer the intermediate product of α-olefin sulfonate sodium to a high-pressure reactor, stir, heat up to the hydrolysis reaction temperature of 160-175°C and maintain it, ...

Embodiment 2

[0064] 1. Preparation of sodium α-olefin sulfonate

[0065] First, add 25wt% α-olefins (where C14α-olefins account for 40wt%, and C16α-olefins account for 60wt%) in the reactor, stir, heat up to 45°C, and then feed 20wt% SO 3 Carry out the sulfonation reaction, and when the reaction is complete and the temperature no longer rises, age for 45 minutes and keep the temperature at 45°C-50°C to obtain α-olefin sulfonic acid;

[0066] To the product after aging (i.e. α-olefin sulfonic acid), slowly dropwise add a surplus mass concentration of 20% sodium hydroxide solution for neutralization reaction, control the temperature during the reaction not to exceed 55 ° C, after the reaction is complete, stir for 30 minutes, Obtain α-olefin sodium sulfonate intermediate product (partially converted α-olefin sulfonate sodium);

[0067] Transfer the intermediate product of α-olefin sulfonate sodium to a high-pressure reactor, stir, heat up to the hydrolysis reaction temperature of 160-175°C ...

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Abstract

The invention relates to a high-temperature foaming agent and a preparation method thereof, wherein the high-temperature foaming agent is prepared from the following materials in percentage by weight: 40-50% of alpha-olefin sulfonate, 25-35% of aryl alkyl sulfonate, 1-5% of high-temperature foam stabilizer and the balance of water. The preparation method of the high-temperature foaming agent comprises the following steps of: placing alpha-olefin sulfonate and aryl alkyl sulfonate in a mixed kettle, stirring, heating to 45-50 DEG C, adding the high-temperature foam stabilizer and water slowly, stirring continuously for 45-60 minutes, reducing temperature and discharging, thereby obtaining the high-temperature foaming agent. The high-temperature foaming agent provided by the invention has good thermal stability and high foaming and sealing performances under high temperature, and has wide application prospect in thickened oil deposit steam injection heat collecting and steam channeling.

Description

technical field [0001] The invention relates to a high-temperature foaming agent and a preparation method thereof, in particular to a high-temperature foaming agent and a preparation method thereof for preventing steam channeling in steam injection thermal recovery of heavy oil reservoirs, and belongs to the technical field of petroleum exploitation. Background technique [0002] After multiple rounds of steam huff and puff or into steam flooding, heavy oil reservoirs will experience steam overburden and steam channeling with the increase of gas injection volume and prolongation of steam injection time. Once steam channeling occurs, steam will rush in one direction, the reservoir will be heated unevenly, and the steam will flow ineffectively in the high-permeability zone, and cannot effectively heat the oil-rich low-permeability zone, resulting in small steam sweep volume, low thermal efficiency, and The economic benefit is poor. [0003] In order to increase the overall sw...

Claims

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Application Information

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IPC IPC(8): C09K8/592E21B43/24
Inventor 郭东红辛浩川孙建峰崔晓东郑晓波
Owner PETROCHINA CO LTD
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