Foaming agent for tertiary oil recovery and preparation method thereof

A technology of foaming agent and formula, which is applied in the field of foaming agent for tertiary oil recovery and its preparation, can solve the problems of no foaming agent, no high-temperature and high-salt foam flooding system, etc., to reduce interfacial tension, improve stability, The effect of good stability

Inactive Publication Date: 2015-10-07
TIANJIN DAGANG OILFIELD BINGANG GRP BOHONG PETROLEUM CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, because foam flooding can significantly enhance the tertiary oil recovery, foaming agents are more and more widely used, but there are basically no relevant reports on high-temperature and high-salt foam flooding systems, making it difficult for high-temperature and high-salt conditions In general, there are basically no foaming agents for tertiary oil recovery

Method used

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  • Foaming agent for tertiary oil recovery and preparation method thereof
  • Foaming agent for tertiary oil recovery and preparation method thereof
  • Foaming agent for tertiary oil recovery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: a kind of blowing agent that is used for tertiary oil recovery, the charging capacity of raw material is:

[0018] Lauryl dimethyl betaine 40Kg; Sodium α-olefin sulfonate (AOS) 20Kg;

[0019] Carboxymethyl cellulose 20Kg; water 20Kg.

[0020] The method for preparing above-mentioned whipping agent may further comprise the steps:

[0021] (1) Add 40Kg dodecyl dimethyl betaine and 20Kg α-olefin sulfonate sodium (AOS) into the reaction kettle, add 10Kg water and 20Kg carboxymethyl cellulose to the reaction kettle while stirring In the kettle, dissolve it.

[0022] (2) Heat and stir. After the components in the reactor are dissolved, add the remaining 10Kg of water into the reactor, and stir evenly to obtain the finished foaming agent.

Embodiment 2

[0023] Embodiment 2: a kind of blowing agent that is used for tertiary oil recovery, the charging capacity of raw material is:

[0024] Lauryl dimethyl betaine 50Kg; Sodium α-olefin sulfonate (AOS) 15Kg;

[0025] Carboxymethyl cellulose 15Kg; water 20Kg.

[0026] The method for preparing above-mentioned whipping agent may further comprise the steps:

[0027] (1) Add 50Kg dodecyl dimethyl betaine and 15Kg α-olefin sulfonate sodium (AOS) into the reaction kettle, add 10Kg water and 15Kg carboxymethyl cellulose to the reaction kettle while stirring In the kettle, dissolve it.

[0028] (2) Heat and stir. After the components in the reactor are dissolved, add the remaining 10Kg of water into the reactor, and stir evenly to obtain the finished foaming agent.

Embodiment 3

[0029] Embodiment 3: a kind of blowing agent that is used for tertiary oil recovery, the charging capacity of raw material is:

[0030] Lauryl dimethyl betaine 50Kg; Sodium α-olefin sulfonate (AOS) 20Kg;

[0031] Carboxymethyl cellulose 20Kg; water 10Kg.

[0032] The method for preparing above-mentioned whipping agent may further comprise the steps:

[0033] (1) Add 50Kg dodecyl dimethyl betaine and 20Kg α-olefin sulfonate sodium (AOS) into the reaction kettle, add 5Kg water and 20Kg carboxymethyl cellulose to the reaction kettle while stirring In the kettle, dissolve it.

[0034] (2) Heat and stir. After each component in the reactor is dissolved, add the remaining 5Kg of water into the reactor, and stir evenly to obtain the finished blowing agent.

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Abstract

The invention provides a foaming agent for tertiary oil recovery and a preparation method thereof. The foaming agent includes: 30-60% of N-dodecyl-N, N-dimethylglycine; 10-40% of sodium alpha-olefin sulfonate (AOS); 10-40% of carboxymethyl cellulose; and 10-60% of water. The preparation method includes: adding the N-dodecyl-N, N-dimethylglycine and sodium alpha-olefin sulfonate (AOS) involved in the formula into a reaction kettle, conducting stirring and simultaneously adding part of water and sodium carboxymethyl cellulose into the reaction kettle, and performing dissolving, when all components in the reaction kettle are dissloved, adding the remaining amount of water into the reaction kettle, and stirring the mixture evenly to obtain a finished product of foaming agent. The foaming system provided by the invention can well reduce the surface tension under different mineralization degrees, and can lower the interfacial tension of crude oil to 0.5*10<-2>mN/m. Also after 3 months of storage at 80DEG C, the viscosity retention rate is more than 90%, and the foaming agent has very good stability.

Description

technical field [0001] The invention relates to the technical field of oilfield chemistry, in particular to a foaming agent for tertiary oil recovery and a preparation method thereof. Background technique [0002] Foaming agent, also known as foaming agent, is a substance that makes the target substance form pores. It can be divided into three categories: chemical foaming agent, physical foaming agent and surfactant. Chemical blowing agents are those compounds that release gases such as carbon dioxide and nitrogen after thermal decomposition, and form pores in the polymer composition; physical blowing agents are foam pores that change the physical form of a certain substance , which is formed by the expansion of compressed gas, the volatilization of liquid or the dissolution of solid; the foaming agent has high surface activity, which can effectively reduce the surface tension of the liquid, and arrange the double electron layer on the surface of the liquid film to surround ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 胡玉国梁海臣李靖张冠洲张有强肖劲松赵东旭张建利黄津高磊张金泉张胜周瑞文赵兴君冯永军王涛苏川
Owner TIANJIN DAGANG OILFIELD BINGANG GRP BOHONG PETROLEUM CHEM
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