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Composite surfactant containing aryl alcohol polyether anionic and nonionic surfactant

A composite surfactant and surfactant technology, applied in drilling compositions, chemical instruments and methods, etc., can solve problems such as poor temperature and salt resistance, low oil displacement efficiency, and high concentration

Active Publication Date: 2021-04-27
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 that the compound oil displacement agent in the prior art has poor temperature and salt resistance, high concentration and low oil displacement efficiency , to provide a composite surfactant containing aryl alcohol polyether anion nonionic surfactant and alkyl polyether quaternary ammonium salt surfactant which can greatly increase the recovery factor under the condition of high temperature and high salt reservoir

Method used

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  • Composite surfactant containing aryl alcohol polyether anionic and nonionic surfactant
  • Composite surfactant containing aryl alcohol polyether anionic and nonionic surfactant
  • Composite surfactant containing aryl alcohol polyether anionic and nonionic surfactant

Examples

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Effect test

Embodiment 1

[0051] (1) HO-[CH(CH 3 )CH 2 O]-[CH 2 CH 2 O]-R 6 Y and Catalyst sodium hydroxide is added to the reactor, and nitrogen gas is introduced to the pressure of 20kg / L to react at 150-180°C, wherein HO-[CH(CH 3 )CH 2 O]-[CH 2 CH 2 O]-R 6 Y, The molar ratio of the catalyst is 1:2:1.5, and then diluted with water, and the oil and water are separated, and the water phase is obtained to obtain aryl alcohol polyoxyethylene polyoxypropylene etherate;

[0052] (2) Add a certain amount of R to the polymerization reactor 4 OH and to account for R 4 The weight of OH is 1% KOH, and the temperature of the system is heated to 80-90°C under stirring, the vacuum system is turned on, dehydrated under high vacuum for 1 hour, and then purged with nitrogen for 3-4 times to remove the air in the system, and then the system After the reaction temperature is adjusted to 130°C, slowly feed the calculated amount of propylene oxide to control the reaction pressure <0.40MPa to carry out the p...

Embodiment 2

[0058] Sodium aryl alcohol polyoxypropylene polyoxyethylene ether sulfonate (R 5 =CH 3 (CH 2 ) 14 ,R 6 =CH 2 ,R 7 =CH 2 ,R 8 =C 9 h 18 , m=9, n=6) 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 1:0.2 Mix the above surfactants uniformly to obtain a surfactant composition product solution 1a.

Embodiment 3

[0060] Sodium aryl alcohol polyoxypropylene polyoxyethylene ether sulfonate (R 5 =CH 3 (CH 2 ) 7 ,R 6 =C 5 h 10 ,R 7 =C 2 h 4 ,R 8 =C 6 h12 , m=7, n=5) and dodecyl polyoxypropylene polyoxyethylene ether hydroxyethyl 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 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 1:0.54 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 an aryl alcohol polyether anionic and nonionic surfactant. 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 is mainly solved. The technical scheme adopted by the invention is as follows: the composite surfactant comprises the following components in parts by mass: (1) 0.01-1.0 part of alkyl polyether quaternary ammonium salt surfactant; and (2) 0.02-1.0 part of an aryl alcohol polyether acid 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 aryl alcohol polyetherate surfactant is shown as the formula (II), the problems are well solved, and the aryl alcohol polyetherate surfactant can be used for tertiary oil recovery production of an oil field.

Description

technical field [0001] The invention relates to a compound surfactant containing aryl alcohol polyether anion nonionic surfactant. 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 urgent to develop new mi...

Claims

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Application Information

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IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 吴欣悦张卫东沙鸥李应成鲍新宁金军
Owner CHINA PETROLEUM & CHEM CORP