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A kind of alkali-free surfactant for oil displacement and preparation method thereof

A surfactant and oil displacement technology, applied in the field of non-alkali surfactant for oil displacement and its preparation, can solve the problem of formation damage caused by alkali in ASP flooding, achieve non-toxic and harmless products, and simple synthesis process , Good high temperature and salt resistance

Active Publication Date: 2016-02-17
HEILONGJIANG SHINEWELL CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of non-alkali surfactant for oil displacement, this non-alkali surfactant for oil displacement is used to solve the problem that alkali damages formation in the existing three-component compound flooding, another purpose of the present invention is Provide the preparation method of this non-alkali surfactant for oil displacement

Method used

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  • A kind of alkali-free surfactant for oil displacement and preparation method thereof
  • A kind of alkali-free surfactant for oil displacement and preparation method thereof
  • A kind of alkali-free surfactant for oil displacement and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0026] (1) Add 1 mol of dodecylamine to a four-neck flask, heat to a molten state, slowly add 1.1 mol of methyl acrylate dropwise under mechanical stirring, complete the dropwise addition within 3.5 hours, and react at a constant temperature of 65°C for 4 hours. After completion of the reaction, excess methyl acrylate was distilled off under reduced pressure at 0.03 MPa to obtain methyl dodecylaminopropionate. The yield is 98.5%. The equation is as follows:

[0027]

[0028] (2) Add 1 mol of methyl dodecylaminopropionate to a four-neck flask, heat at 90°C until molten, add 1.05 mol of N,N-dimethyl-1,3-propanediamine, and add di React with 5% NaOH methanol solution or KOH methanol solution of the total mass for 1 hour, install a water separator, slowly raise the temperature to 135-150°C, reflux for 5 hours under reduced pressure of 0.03MPa, recover methanol, and consider the reaction until no methanol is formed. At the end point, the mass percentage concentration of NaOH m...

Embodiment 2

[0033] (1) Add 1 mol of aliphatic amine to a four-neck flask, heat to a molten state, slowly add 1.2 mol of methyl acrylate dropwise under mechanical stirring, complete the dropwise addition within 3.5 hours, and react at a constant temperature of 65°C for 4 hours. After the reaction is completed, excess methyl acrylate is distilled off under reduced pressure at 0.03 MPa to obtain methyl aliphatic aminopropionate. The yield is 98%.

[0034] (2) Add 1 mol of aliphatic methyl aminopropionate to a four-necked flask, heat it to a molten state at 90°C, add 1.05 mol of N,N-dimethyl-1,4-butanediamine, and add both React with 5% NaOH methanol solution or KOH methanol solution of the total mass for 1 hour, install a water separator, slowly raise the temperature to 135-150°C, and reflux reaction for 5 hours under reduced pressure of 0.03MPa, recover methanol, until no methanol is formed, it is regarded as the end of the reaction . The yield is 92%.

[0035] (3) Put the quaternization...

Embodiment 3

[0037] (1) Add 1 mol of aliphatic amine to a four-neck flask, heat to a molten state, slowly add 1.1 mol of butyl acrylate dropwise under mechanical stirring, and complete the dropwise addition within 3.5 hours, and react at a constant temperature of 65°C for 4 hours. After the reaction is completed, the excess butyl acrylate is distilled off under reduced pressure at 0.03 MPa to obtain fatty aminopropionate butyl. Yield 97.5%.

[0038](2) Add 1 mol of aliphatic butylaminopropionate to a four-necked flask, heat it to a molten state at 90°C, add 1.1 mol of N,N-dimethyl-1,5-pentanediamine, and add both React with 5% NaOH methanol solution or KOH methanol solution of the total mass for 1 hour, install a water separator, slowly raise the temperature to 135-150°C, and reflux reaction for 5 hours under reduced pressure of 0.03MPa, recover methanol, until no methanol is formed, it is regarded as the end of the reaction . The yield is 91%.

[0039] (3) Put the quaternization reagen...

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Abstract

The invention relates to an alkali-free surface active agent for displacing oil and a preparation method thereof. The structural formula of the alkali-free surface active agent for displacing oil is shown in the specification, wherein R in the formula is selected from dodecyl, myristyl, hexadecyl and octadecyl. Under the alkali-free condition, in a binary compound system formed by the alkali-free surface active agent and polymer, the oil-water interfacial tension can be up to ultra low (10-3mM / m order of magnitude); the alkali-free surface active agent is the excellent alkali-free surface active agent for displacing the oil; the problem of damaging a stratum by alkali in the existing three compound combination flooding can be solved.

Description

1. Technical field [0001] The invention relates to a surfactant used in oil field tertiary oil recovery, in particular to an alkali-free surfactant for oil displacement and a preparation method thereof. 2. Background technology [0002] Surfactants play an important role in tertiary oil recovery. It mainly achieves the purpose of enhancing oil recovery by reducing the oil-water interfacial tension and increasing the capillary number. Various chemical flooding techniques containing surfactants are widely used in tertiary oil recovery. Laboratory and field studies have shown that the recovery rate of alkali / surfactant / polymer (ASP) ASP flooding can be increased by more than 20% on the basis of water flooding, and it has a good effect of increasing oil production and reducing water loss. In the application of ASP flooding, although strong alkali (NaOH) can react with active components in crude oil to generate natural surfactants, it has a synergistic effect with external surf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/584C07C309/14C07C303/32
CPCC07C303/32C07C309/14C09K8/584
Inventor 徐立波闫喜林
Owner HEILONGJIANG SHINEWELL CHEM CO LTD
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