Alkyl aryl alkylbetaine surfactant composition and its application in tertiary oil recovery

A technology of alkyl aryl alkyl and surfactant, which is applied in the field of novel alkyl aryl alkyl betaine type surfactant composition, can solve problems such as stratum and oil well damage, achieve no damage to equipment, improve crude oil Recovery rate, the effect of overcoming huge damage

Inactive Publication Date: 2005-01-19
大庆高新区鑫诺精细化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing ASP flooding system contains a high concentration of alkali, such as sodium hydroxide, sodium carbonate, etc., which will cause great damage to the formation and oil wells during use, so there is an urgent need for a A new type of oil displacement system, in the absence of alkali, can still form 10 -3 ~10 -4 Ultra-low interfacial tension of mN / m, enhance oil recovery by more than 20% (OOIP)

Method used

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  • Alkyl aryl alkylbetaine surfactant composition and its application in tertiary oil recovery
  • Alkyl aryl alkylbetaine surfactant composition and its application in tertiary oil recovery
  • Alkyl aryl alkylbetaine surfactant composition and its application in tertiary oil recovery

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Experimental program
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Effect test

Embodiment 1

[0060] Embodiment one: the preparation of novel alkyl aryl alkyl betaine type surfactant

[0061] 1. m is 12, n is 4, p is 0, x is 1; R 6 for CH 3 , namely R 1 for C 12 h 25 Alkyl; R 2 for C 4 h 8 Alkyl; R 3 Be the preparation of the alkyl aryl alkyl betaine type surfactant of H group:

[0062] 10mol benzene 1mol (780g) adds in the reactor, stirs, in catalyst AlCl 3 Add 1 mol (168g) of branched dodecene dropwise at 58-60°C under the action of the reaction to obtain 240g of dodecylbenzene, then add it into the reaction kettle, stir, and in the catalyst AlCl 3 1 mol (127 g) of dichlorobutane was added dropwise at 58-60° C. to obtain 320 g of branched chain dodecylphenylbutyl chloride. 10 mol of dimethylamine was added, and the reaction was carried out at 100°C. To obtain branched dodecyl phenyl butyl tertiary amine. Add 0.6 mol (204 g) of branched dodecyl phenylbutyl tertiary amine into the reactor, heat to melt, stir, add 0.6 mol of sodium chloroacetate and water at...

Embodiment 2

[0066] Novel alkyl aryl alkyl betaine type surfactant composition, this composition comprises following several compositions:

[0067] 1. The alkyl aryl alkyl betaine type surfactant is 0.3% (weight); Wherein the alkyl aryl alkyl betaine type surfactant is branched chain dodecyl phenylbutyl tertiary amine betaine (its molecular formula where m is 12, n is 4, p is 0, x is 1; R 6 for CH 3 , namely R 1 for C 12 h 25 Alkyl; R 2 for C 4 h 8 Alkyl; R 3 for H);

[0068] ② Polymer is 0;

[0069] ③The balance is oilfield injected sewage.

[0070] The dynamic interfacial tension (IFT) relationship between the above-mentioned novel alkyl aryl alkyl betaine type surfactant composition oil displacement system and underground crude oil at different times (min) is shown in Fig. 1 . As can be seen from Fig. 1, when novel alkyl aryl alkyl betaine type surfactant composition is applied in tertiary oil recovery, that is surfactant (branched chain dodecyl phenylbutyl tertiary amine bet...

Embodiment 3

[0072] Novel alkyl aryl alkyl betaine type surfactant composition, this composition comprises following several compositions:

[0073] 1. The alkyl aryl alkyl betaine type surfactant is 0.05% (weight); Wherein the alkyl aryl alkyl betaine type surfactant is branched chain dodecyl phenylbutyl tertiary amine betaine (its molecular formula where m is 12, n is 4, p is 0, x is 1; R 6 for CH 3 , namely R 1 for C 12 h 25 Alkyl; R 2 for C 4 h 8 Alkyl; R 3 for H);

[0074] ② Polymer is 0;

[0075] ③The balance is oilfield injected sewage.

[0076] The dynamic interfacial tension (IFT) relationship between the above-mentioned novel alkyl aryl alkyl betaine type surfactant composition oil displacement system and underground crude oil at different times (min) is shown in Fig. 2 . As can be seen from Fig. 2, when novel alkyl aryl alkyl betaine type surfactant composition is applied in tertiary oil recovery, that is surfactant (branched chain dodecyl phenyl butyl tertiary amine b...

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Abstract

The invention discloses an novel alkyl aryl alkylbetaine surfactant composition and its application in tertiary oil recovery, wherein the betaine type surfactant composition oil dispelling system or betaine type surfactant prepared from alkyl aryl alkylbetaine surfactant i.e. polymerized binary composite composition oil dispelling system and the underground crude oil can reach a ultralow interfacial tension of 0.001-0.0001 mN/m, thus can effectively substitute the residual oil in the oil reservoir.

Description

technical field [0001] The invention discloses a novel alkyl aryl alkyl betaine surfactant composition and its application in tertiary oil recovery. Background technique [0002] The application of surfactants in oil recovery technology began in the early 1930s and has a history of more than 70 years. Over the past 70 years, both theory and practice have achieved great development. At present, the following injection systems have basically been formed: (1) active water flooding, (2) micellar solution flooding, (3) low Interfacial tension system flooding, (4) ASP flooding. Among them, ASP flooding (alkali-polymer-surfactant) is a new method of enhancing oil recovery developed in the 1980s. High oil displacement efficiency can still be obtained, therefore, it has become a new technology for enhancing oil recovery that is economically and technically successful. [0003] After the oil field enters the high water cut period, the remaining oil is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/25
Inventor 刘春德
Owner 大庆高新区鑫诺精细化工有限公司
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