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Oil-displacement surfactant composition, preparation method and application

A technology of surfactants and compositions, applied in the field of surfactant compositions for oil displacement, can solve problems such as damage, poor oil displacement efficiency, corrosion equipment and pipeline emulsification difficulty, and achieve improved oil displacement efficiency and interfacial activity High, the effect of avoiding damage

Active Publication Date: 2015-01-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] One of the technical problems to be solved by the present invention is that the existing surfactants have poor oil displacement efficiency in the tertiary oil recovery process, and at the same time, because the oil displacement system contains inorganic alkali, it will cause damage to the formation and oil well, corrode equipment and pipelines, and be difficult to break emulsion To solve the problem, a new surfactant composition for oil displacement is provided, which has high interfacial activity, strong oil washing ability, simple system, will not cause damage to formations and oil wells, and will not corrode equipment, pipelines and Advantages of not causing difficulty in demulsification

Method used

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  • Oil-displacement surfactant composition, preparation method and application
  • Oil-displacement surfactant composition, preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1a

[0029] CH 3 (CH 2 ) 10 CH=CHCOOH, pentadecylbenzene and perchloric acid are added to the reaction kettle, and N 2 to a pressure of 35kg / cm 2 , at 200 o C reacted for 2 hours, wherein CH 3 (CH 2 ) 10 CH=CHCOOH: pentadecylbenzene: perchloric acid molar ratio is 1:1:0.1. After the reaction finishes, add the Pd / C catalyst of fatty acid weight 1%, at 100 o C. 100kg / cm 2 Pressure hydrogenation reaction for 10 hours, and then filter out the Pd / C catalyst; add the aryl-substituted aliphatic alcohol and NaOH obtained in the previous steps into the reactor at a molar ratio of 1:1.5, stir for 30 minutes and then add the required propylene oxide, at 150 o C reaction 5 hours; Then add the required amount of oxirane, at 200 o C was reacted for 1 hour to obtain aryl-substituted fatty alcohol polyoxypropylene polyoxyethylene ether; then according to polyether: ClCH 2 SO 3 Na molar ratio 1:3, add sulfonation reagent, heat up to 70 o C was reacted for 10 hours. After the reaction...

Embodiment 2

[0033] CH 3 (CH 2 ) 6 CH=CHCOOH, Octylbenzene and ClSO 3 H is added to the reactor, and N 2 Up to a pressure of 100kg / cm 2 , at 50 o C reacted for 20 hours, wherein CH 3 (CH 2 ) 6 CH=CHCOOH: Octylbenzene: ClSO 3 The H molar ratio is 1:1:0.25. After the reaction finishes, add the Pd / C catalyst of fatty acid weight 0.2%, at 120 o C. 120kg / cm 2 Pressure hydrogenation reaction for 8 hours, and then filter out the Pd / C catalyst; add the aryl-substituted aliphatic alcohol and KOH obtained in the previous steps according to the molar ratio of 1:1.5 into the reactor, stir for 30 minutes, then add the required propylene oxide, and then 120 o C reaction 7 hours; Then add the required amount of oxirane, at 160 o C reacted for 4 hours to obtain aryl-substituted fatty alcohol polyoxypropylene polyoxyethylene ether; then add sulfonating reagent according to polyether:sodium isethionate molar ratio 1:2.5, and heat up to 90 o C was reacted for 8 hours. After the reaction, neutr...

Embodiment 3

[0037] CH 3 (CH 2 ) 4 CH=CH(CH 2 ) 3 COOH, pentylbenzene and p-toluenesulfonic acid are added to the reaction kettle, and N 2 Up to a pressure of 100kg / cm 2 , at 50 o C reacted for 20 hours, wherein CH 3 (CH 2 ) 4 CH=CH(CH 2 ) 3 The molar ratio of COOH:amylbenzene:toluenesulfonic acid is 1:1:0.25. After the reaction finishes, add the Pt / C catalyst of fatty acid weight 0.2%, at 300 o C. 100kg / cm 2 Pressure hydrogenation reaction for 1 hour, and then filter out the Pt / C catalyst; add the aryl-substituted aliphatic alcohol and CsOH obtained in the previous steps into the reaction kettle according to the molar ratio of 1:1.5, stir for 30 minutes, then add the required propylene oxide, and then 100 o C reaction 20 hours; Then add the required amount of oxirane, at 200 o C was reacted for 1 hour to obtain aryl-substituted fatty alcohol polyoxypropylene polyoxyethylene ether; then according to the molar ratio of polyether: sodium hydroxyamylsulfonate 1:4, add sulfonati...

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Abstract

The invention relates to an oil-displacement surfactant composition, a preparation method and application, and mainly solves the problems that conventional surfactants are bad in oil displacement efficiency in the process of tertiary oil recovery, and an oil displacement system damages stratums and oil wells, corrodes equipment and pipelines and cause demulsification difficulty because of a contained inorganic base. The employed oil-displacement surfactant composition comprises a cationic surfactant and an anionic-nonionic surfactant with the molar ratio of 1:0.01-1:100, wherein the anionic surfactant is at least one selected from quaternary ammonium salts or quaternary amine bases, and the anionic-nonionic surfactant has the molecular general formula shown in the specification, and the in general formula, M is any one of alkali metals, alkali earth metals and ammonium radical. The technical scheme relatively well solves the above problems, and is applicable to an enhanced oil recovery process of oil fields.

Description

technical field [0001] The invention relates to a surfactant composition for oil displacement, a preparation method and its application in oil field displacement. Background technique [0002] With the increase of the world's energy demand, the rational development and utilization of oil has attracted great attention, and the requirements for the amount and efficiency of oil extraction are also getting higher and higher. Realizing the efficient exploitation of oil and gas resources not only has practical significance for increasing crude oil production, but also has important strategic significance. Conventional oil recovery methods (primary and secondary methods) generally only produce 1 / 3 of the crude oil geological reserves, and about 2 / 3 of the crude oil has not been recovered. Therefore, in the case of increasingly tight energy sources, enhanced oil recovery has become a A major topic of oil exploration research. Tertiary oil recovery technology is an effective method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C07C309/10C07C303/32C07C309/42C07C65/21C07C51/41C07C59/125C08G65/28C08G65/334C08G65/332
Inventor 李应成顾松园沈之芹何秀娟杨一青
Owner CHINA PETROLEUM & CHEM CORP
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