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Composite surfactant containing bisphenol A polyether diacid salt, preparation method and application thereof

A composite surfactant and surfactant technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of poor temperature resistance and salt resistance, low oil displacement efficiency, high use concentration, etc., to achieve enhanced anti-corrosion Effects of adsorption, improving oil displacement efficiency, and enhancing interfacial activity

Active Publication Date: 2021-04-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the technical problems to be solved by the present invention is the problem of poor temperature and salt resistance, high use concentration and low oil displacement efficiency of the composite oil displacement agent in the prior art. Composite Surfactant Containing Bisphenol A Polyether Dibasic Acid for Increased Oil Recovery

Method used

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  • Composite surfactant containing bisphenol A polyether diacid salt, preparation method and application thereof
  • Composite surfactant containing bisphenol A polyether diacid salt, preparation method and application thereof
  • Composite surfactant containing bisphenol A polyether diacid salt, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] (1) Add a certain amount of bisphenol A and 1% KOH by weight of bisphenol A to the polymerization reactor, heat the system temperature to 80-90°C under stirring, open the vacuum system, dehydrate under high vacuum for 1 hour, and then use Nitrogen was purged 3 to 4 times to remove the air in the system, and then the reaction temperature of the system was adjusted to 130°C, and then the calculated amount of propylene oxide was slowly introduced to control the reaction pressure <0.40MPa to carry out the propoxylation and alkylation reaction. After the reaction of this step is finished, continue to slowly feed the calculated amount of oxirane. After the reaction (the reaction pressure remains unchanged), purge the system with nitrogen to remove unreacted oxirane, neutralize and decolorize after cooling. , filtration, and dehydration to obtain bisphenol A polyoxypropylene polyoxyethylene ethers with different degrees of polymerization.

[0056] (2) Put 1 mol of bisphenol A ...

Embodiment 2

[0063] Bisphenol A polyoxypropylene (10) polyoxyethylene ether (4) sodium disulfonate and tetradecyl polyoxypropylene polyoxyethylene ether hydroxyethyl ammonium chloride (R 1 =C 14 h 30 , R 2 =CH 3 , R 3 =CH 3 , R 4 =CH(OH)CH 3 , a=2, b=6) Surfactants were respectively dissolved in formation water with a salinity of 200,000 mg / L, stirred for 30 minutes, and prepared into a 0.1-0.5% wt aqueous solution, and then according to the molar ratio of anion: cationic surfactant 1:1.2 Mix the above surfactants uniformly to obtain a surfactant composition product solution 1a.

Embodiment 3

[0065] Bisphenol A polyoxypropylene (8) polyoxyethylene ether (3) sodium disulfonate and dodecyl polyoxypropylene polyoxyethylene ether ammonium chloride (R 1 =C 12 h 26 , R 2 =CH 3 , R 3 =CH 3 , R 4 =CH(OH)CH 3 , a=0, b=7) Surfactants were respectively dissolved in formation water with a salinity of 200000mg / L, stirred for 30 minutes, and prepared into a 0.1-0.5%wt aqueous solution, and then according to the anion: cationic surfactant molar ratio 1:0.35 Mix the above surfactants uniformly to obtain the surfactant composition product solution 2a.

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Abstract

The invention relates to a composite surfactant containing a bisphenol A polyether diacid salt, a preparation method and application thereof. The invention mainly aims to solve the problem that in the prior art, a composite oil displacement agent is difficult to effectively improve the recovery ratio under the high-temperature and high-salt oil reservoir condition. The technical scheme adopted by the invention is as follows: the composite surfactant comprises the following components by mass: (1) 0.01-1.0 part of an alkyl polyether quaternary ammonium salt surfactant; and (2) 0.005-1.0 part of a bisphenol A polyether diacid salt surfactant; wherein the general molecular formula of the alkyl polyether quaternary ammonium salt surfactant is shown as a formula (I); according to the technical scheme, the molecular general formula of the bisphenol A polyether diacid salt surfactant is shown as a formula (II), the problem is well solved, and the bisphenol A polyether diacid salt surfactant can be used for tertiary oil recovery production of an oil field.

Description

technical field [0001] The invention relates to a composite surfactant containing bisphenol A polyether diacid and its preparation method and application. Background technique [0002] Petroleum is an important non-renewable strategic resource, occupies an important position in my country's energy structure, and is also an important raw material for the chemical industry, which is of great significance to the construction of the national economy. Due to the severe production decline situation of the major oilfields developed in my country, the types of oil and gas reservoirs with proven unproduced reserves are complex, especially the high-temperature and high-salt reservoirs, heavy oil and extra-heavy oil, and low-permeability and ultra-low-permeability reservoirs that have been and will be produced (collectively referred to as harsh oil reservoirs) accounts for a large proportion year by year, and it is very difficult to develop using existing technologies. Therefore, it is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584
Inventor 吴欣悦张卫东沙鸥李应成孟勇郭榕
Owner CHINA PETROLEUM & CHEM CORP