Composite surfactant composition and preparation method thereof

A technology of surfactant and composition, applied in the field of composite surfactant composition and preparation thereof, can solve the problems of poor oil displacement efficiency, difficulty in corroding equipment and pipeline demulsification, damage, etc., and achieves high interfacial activity and good Beneficial for stripping and improving oil displacement efficiency

Active Publication Date: 2017-02-15
CHINA PETROLEUM & CHEM CORP +1
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  • 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. To solve the problem, a new composite surfactant composition is provided, which has high interfacial activity, strong oil washing ability, simple system, will not cause damage to formations and oil wells, will not corrode equipment and pipelines, and will not Advantages that can cause difficulty in demulsification

Method used

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  • Composite surfactant composition and preparation method thereof
  • Composite surfactant composition and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Add alkylphenol polyoxyethylene ether and NaOH to the reaction kettle according to the molar ratio of 1:5, at 100 o C alkalized for 1 hour, then added sulfonated reagent according to the molar ratio of alkylphenol polyoxyethylene ether: chloromethylsulfonic acid 1:4, and cooled to 50 o C continued to react for 20 hours, then added hydrochloric acid to neutralize to pH<3, allowed to stand and separate layers, and added 30% NaOH aqueous solution to the oil phase for neutralization to obtain sodium alkylphenol polyoxyethylene ether sulfonate.

[0024] Cetyltrimethylammonium chloride and the alkylphenol polyoxyethylene ether sodium sulfonate surfactant prepared by the present invention were dissolved in water respectively, stirred for 30 minutes, and mixed with a 0.3% aqueous solution, and then the above surfactant According to the cation:anion-nonionic surfactant molar ratio of 1:0.3, mix uniformly to obtain composite surfactant composition 1, its composition and structure...

Embodiment 2

[0026] Add alkylphenol polyoxyethylene ether and KOH to the reaction kettle according to the molar ratio of 1:1, alkalinize at room temperature for 10 hours, and then add sulfonate according to the molar ratio of alkylphenol polyoxyethylene ether: sodium isethionate 1:3 Chemical reagents, heated to 70 o C continued for 10 hours, then added hydrochloric acid to neutralize to pH<3, and separated oil from water, added ammonia water to the oil phase to neutralize, and obtained ammonium alkylphenol polyoxyethylene ether sulfonate.

[0027] Benzyltriethylammonium chloride and the ammonium alkylphenol polyoxyethylene ether sulfonate 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 surfactant was mixed according to the cationic : anionic-nonionic surfactant molar ratio 1: 0.1 mixed evenly, to obtain composite surfactant composition 2, its composition, structure see...

Embodiment 3

[0029] Add alkylphenol polyoxyethylene ether and KOH to the reactor according to the molar ratio of 1:1.5, at 30 o C alkalization for 8 hours, then add sulfonating reagent according to the molar ratio of alkylphenol polyoxyethylene ether: sodium chloropentyl sulfonate 1:2, and heat up to 60 o C continued for 15 hours, then added hydrochloric acid to neutralize to pH3 ) 2 The aqueous solution is neutralized to obtain calcium alkylphenol polyoxyethylene ether sulfonate.

[0030] Phenyltrimethylammonium chloride and the alkylphenol polyoxyethylene ether calcium sulfonate surfactant prepared according to the present invention were dissolved in water respectively, stirred for 30 minutes, and were mixed with 0.3% aqueous solution, and then the above surfactant was prepared according to Cationic:anionic-nonionic surfactant molar ratio 1:1.2 was mixed evenly to obtain composite surfactant 3, whose composition and structure are shown in Table 1.

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Abstract

The invention relates to a composite surfactant composition as well as a preparation method thereof, and mainly solves the problems that an existing surfactant is poor in oil driving efficiency during three times of oil extraction processes, meanwhile, an oil driving system contains inorganic alkaline, hurts the ground layer and an oil well, and corrodes equipment and pipelines, and demulsification is difficult. According to the composition and the preparation method, the surfactant composition comprises a cation surfactant and an anion-non-ion surfactant, wherein the cation surfactant is selected from any one of quaternary ammonium salt and quaternary amine alkali, the anion-non-ion surfactant is a surfactant containing ethoxy nonionic groups and carboxyl or sulfo anionic groups, and the mole ratio of the cation surfactant to the anion-non-ion surfactant is (1:0.01)-(1:100); by using the composition and the preparation method, the problems are solved well, and the composite surfactant composition as well as the preparation method thereof can be used in the process of three times of oil extraction in an oil field.

Description

technical field [0001] The invention relates to a composite 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 divide...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 李应成沈之芹翟晓东陈安猛高磊
Owner CHINA PETROLEUM & CHEM CORP
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