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Surfactant, composition and preparation method for amphiphilic gamma type oil displacement

A technology of surfactant and composition, which is applied in the field of surfactants for oil displacement, can solve the problem that surfactants are difficult to meet the oil production needs of Xinjiang Oilfield Company, and achieve good compatibility, good stability and good salt resistance. Effect

Active Publication Date: 2020-11-03
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a surfactant for amphiphilic gamma type oil displacement, composition and preparation method thereof, to solve the problem that the surfactant in the prior art is difficult to meet the oil recovery needs of Xinjiang Oilfield Company

Method used

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  • Surfactant, composition and preparation method for amphiphilic gamma type oil displacement
  • Surfactant, composition and preparation method for amphiphilic gamma type oil displacement
  • Surfactant, composition and preparation method for amphiphilic gamma type oil displacement

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preparation example Construction

[0034] In another typical embodiment of the present application, a preparation method of any one of the above-mentioned surfactants is provided, the preparation method comprising: Step S1, making R 1 NH 2 and CH 2 =CR 3 -COO(CH 2 ) m CH 3 Carry out a Michael addition reaction to give R 1 NH-CH 2 -CHR 3 COO(CH 2 ) m CH 3 , where R 1 for C 12 ~C 22 Alkyl, cycloalkyl or alkenyl, R 3 Be H or methyl, m is any integer in 0 to 3; Step S2, make R 1 NH-CH 2 -CHR 3 COO(CH 2 ) m CH 3 and X-CH 2 -COOM or X-CH 2 -CH 2 -SO 3 M is reacted to give R 1 NR 2 -CH 2 -CHR 3 COO(CH 2 ) m CH 3 , where R 2 for -CH 2 COOM or CH 2 -CH 2 SO 3 M, M is alkali metal ion, and X is halogen; Step S3, makes R 1 NR 2 -CH 2 -CHR 3 COO(CH 2 ) m CH 3 and react, get and step S4, so that and Y-CH 2 CHOHCH 2 SO 3 M' reacts to get Wherein, Y is a halogen, and M' is an alkali metal ion.

[0035] The above-mentioned reaction processes are all realized according to th...

Embodiment 1

[0050] Add 1 mol of octadecylamine to the four-necked bottle, and heat octadecylamine to a molten state, slowly add 1.1 mol of methyl acrylate dropwise under mechanical stirring, and complete the dropwise addition within 3.5 hours to form the first reaction system; 65 Continue the constant temperature reaction at ℃ for 4 hours. After the reaction is completed, the first product system is obtained. The excess methyl acrylate in the first product system is distilled off at 0.03 MPa to obtain methyl octadecylaminopropionate with a yield of 98.5 %;

[0051] Add 1 mol of methyl octadecylaminopropionate to the four-necked flask, heat at 90°C to a molten state, and add 1.05 mol of sodium chloroacetate to the four-necked flask to form a second reaction system; after reacting for 2 hours, the obtained The third reaction system; in the third reaction system, dropwise add 1 mol of sodium hydroxide solution to control the pH value of the third reaction system between 8 and 9, and react at...

Embodiment 2

[0057] Add 1 mol of octadecylamine to the four-necked bottle, and heat the octadecylamine to a molten state, slowly add 1.2 mol of methyl acrylate dropwise under mechanical stirring, and complete the dropwise addition within 3.5 hours to form the first reaction system; 65 ℃ under constant temperature reaction 4h. After the reaction was completed, the first product system was obtained, and the excess methyl acrylate in the first product system was distilled off at 0.03 MPa to obtain methyl octadecylaminopropionate with a yield of 98%.

[0058] Add 1 mol of methyl octadecylaminopropionate to the four-necked flask, heat at 90°C to a molten state, and add 1.05 mol of sodium chloroacetate to the four-necked flask to form a second reaction system; after reacting for 2 hours, the obtained The third reaction system: 1 mol of sodium hydroxide solution was added dropwise to the third reaction system, and the reaction was carried out at constant temperature for 4 hours to obtain a transe...

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Abstract

The invention provides an amphiphilic gamma type oil displacement surfactant, a composition and a preparation method thereof. The surfactant has a structural formula shown as the specification, wherein R1 is alkyl, cycloalkyl or alkenyl of C12-C22; R2 is -CH2COOM or CH2-CH2SO3M, M is an alkali metal ion; R3 is H or methyl; and n is any integer of 2-6. The amphiphilic gamma type oil displacement surfactant with the above structure provided by the invention contains two surface active groups, i.e. amide structure and betaine structure, therefore has good stability and good salt resistance, can produce ultra-low interfacial tension in a high salt concentration range, is suitable for a lot of oilfield environments, and is especially suitable for high salt oilfields. At the same time, the surfactant has good compatibility with petroleum sulfonate, thus meeting the oil recovery needs of Xinjiang oilfield company.

Description

technical field [0001] The invention relates to the field of surfactants for oil displacement, in particular to an amphiphilic gamma type surfactant for oil displacement, a composition and a preparation method thereof. Background technique [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 technologies containing surfactants are widely used in tertiary oil recovery. At present, petroleum sulfonate (KPS) is widely used in oil flooding in Xinjiang oilfields. This surfactant has raw material sources In addition to the advantages of wide range and low price, it also has good compatibility with crude oil and emulsifying properties. [0003] However, the interfacial tension between KPS and oil-water is limited by the complex composition of raw materials, and it is difficult to maintain stability. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 栾和鑫陈权生吴运强娄清香李织宏向湘兴陈静
Owner PETROCHINA CO LTD
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