Surfactant composition and its preparation method

A surfactant and composition technology, applied in the field of surfactant composition and its preparation, can solve the problems of formation and oil well damage, corrosion of equipment and pipelines, difficulty in demulsification, poor oil displacement efficiency, etc., to avoid damage, The effect of improving oil displacement efficiency and enhancing recovery factor

Active Publication Date: 2016-02-10
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 wells, corrode equipment and pipelines, and be difficult to break emulsion. problem, providing a new surfactant composition

Method used

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  • Surfactant composition and its preparation method
  • Surfactant composition and its preparation method
  • Surfactant composition and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Will C 5 h 11 COOCH 3 , Diethanolamine is added to the reaction kettle according to the molar ratio of 1:1.5, and 0.8% of the NaOH of the total weight of the aforementioned materials is added at the same time, at 100 o C reacted for 10 hours; Then add the required ethylene oxide, propylene oxide, at 200 o C reacted again for 1 hour; then follow C 5 h 11 COOCH 3 Add sodium chloroacetate at a molar ratio of 1:1 to carboxylation reagent, at 50 o C continued to react for 20 hours, and finally added hydrochloric acid to neutralize to pH<3, allowed to stand for separation, and added 30% NaOH aqueous solution to the oil phase for neutralization to obtain an anionic-nonionic surfactant.

[0028] Tetraethylammonium chloride and the anionic-nonionic surfactant prepared by the present invention were respectively dissolved in water, stirred for 30 minutes, and formulated into a 0.3% aqueous solution, and then the above-mentioned surfactant was mixed according to cationic:anio...

Embodiment 2

[0030] Will C 20 h 41 COOH and ethanolamine are added to the reaction kettle according to the molar ratio of 1:1.8, and 0.5% of the total weight of the aforementioned materials is added to the KOH at the same time, at 200 o C reaction 1 hour; Then add required ethylene oxide, propylene oxide, at 100 o C reacted again for 10 hours; then follow C 20 h 41 Add sodium chloroacetate at a molar ratio of COOH to carboxylation reagent of 1:1.5, at 80 o C continued to react for 8 hours, and finally added hydrochloric acid to neutralize to pH<3, allowed to stand for separation, and added 30% NaOH aqueous solution to the oil phase for neutralization to obtain an anionic-nonionic surfactant.

[0031] Tetrabutylammonium chloride and the anionic-nonionic surfactant prepared by the present invention were respectively dissolved in water, stirred for 30 minutes, and formulated into a 0.3% aqueous solution, and then the above-mentioned surfactant was mixed according to cationic: anionic-noni...

Embodiment 3

[0033] Will C 14 h 29 COOCH 3 , ethanolamine is added to the reactor according to the molar ratio of 1:1, and 15% of the KOH of the total weight of the aforementioned materials is added at the same time, at 160 o C reacted for 8 hours; Then add the required oxirane, propylene oxide, at 150 o C reacted again for 10 hours; then follow C 14 h 29 COOCH 3 Add Br(CH 2 ) 5 COOH, at 100 o C continued to react for 1 hour, finally added hydrochloric acid to neutralize to pH3 ) 2 The aqueous solution is neutralized to obtain anionic-nonionic surfactant.

[0034] Tetraoctyl ammonium chloride and the anionic-nonionic surfactant prepared by the present invention were dissolved in water respectively, stirred for 30 minutes, and formulated into a 0.3% aqueous solution, and then the above-mentioned surfactant was mixed according to cationic: anionic-nonionic surfactant The molar ratio of 1:1.4 was mixed evenly to obtain surfactant composition 3, whose composition and structure are sh...

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Abstract

The invention relates to a surfactant composition and a preparation method thereof, which mainly solve the problems that the oil displacement efficiency of the existing surfactant is low in the tertiary oil recovery process and damage to strata and oil wells, corrosion to equipment and pipelines and difficulty in demulsification occur because an oil displacement system contains inorganic alkali. According to the technical scheme of the invention, the surfactant composition comprises cationic surfactant and anionic-nonionic surfactant, wherein the cationic surfactant is at least one selected from quaternary ammonium salt or quaternary amine alkali, the anionic-nonionic surfactant is at least one selected from alkanolamide polyoxy ethylene / propylene ether carboxylate or alkanolamide polyoxy ethylene / propylene ether sulfonate, and the mol ratio of the cationic surfactant to the anionic-nonionic surfactant is (1:0.01)-(1:100). The invention also provides a preparation method of the surfactant composition. Thus, the problems are well solved; and the invention can be used for the forced oil recovery process of oil fields.

Description

technical field [0001] The invention relates to a surfactant composition and a preparation method thereof. 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 to increase oil recovery, which can be divided into fou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 李应成沈之芹张卫东沙鸥杨一青
Owner CHINA PETROLEUM & CHEM CORP
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