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Preparation method for temperature-resistant salt-tolerant oil-displacing foaming agent

A technology of temperature resistance and salt resistance, foaming agent, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of loss of foaming ability, low oil displacement efficiency, short half-life, etc., to improve temperature resistance and Salt tolerance, improved temperature resistance, effect of improved salt tolerance

Inactive Publication Date: 2018-06-22
王敏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention: due to the influence of the geological conditions of oil production, the deeper the formation, the higher the salinity and the higher the temperature of the formation water, which will lead to the loss of foaming agent under this condition. Foaming ability, there are defects such as short half-life and low oil displacement efficiency, a preparation method of temperature and salt resistant oil displacement foam agent is provided

Method used

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  • Preparation method for temperature-resistant salt-tolerant oil-displacing foaming agent

Examples

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Effect test

example 1

[0023] Put 8mL of ethylene into 20mL of toluene, then add 5g of aluminum chloride, heat up to 65°C and react for 1h, add anhydrous magnesium sulfate to dry and distill for 30min, filter and remove the filter residue to obtain self-made alkylbenzene, the volume ratio is 1: 2:3 Mix sulfuric acid solution with a concentration of 1.5mol / L, 1,2-dichloroethane and self-made alkylbenzene in a beaker, react at 16°C for 1 hour, then add 8mL deionized water, and continue the heat preservation reaction 2h, after the reaction, add 16mL of sodium hydroxide solution with a mass fraction of 25% to react for 1h, dry, and discharge to obtain self-made sodium linear alkylbenzene sulfonate. Measure 20mL of polyether and 35mL of sodium carbonate with a mass fraction of 10%. The solution was mixed and stirred for 3 minutes. After stirring, 3g of ethylenediaminetetraacetic acid was added, mixed and stirred for 12 minutes, and heated to 35°C to obtain a self-made mixed solution. 10g of quartz sand wa...

example 2

[0025]Put 9mL of ethylene into 25mL of toluene, then add 6g of aluminum chloride, heat up to 70°C and react for 1.5h, add anhydrous magnesium sulfate to dry and distill for 38min, filter and remove the filter residue to obtain self-made alkylbenzene, the volume ratio is 1 :2:3 Mix sulfuric acid solution with a concentration of 1.5mol / L, 1,2-dichloroethane and self-made alkylbenzene in a beaker, react at 20°C for 1.5h, then add 9mL deionized water, continue Insulated reaction for 3 hours, after the reaction, add 17 mL of sodium hydroxide solution with a mass fraction of 25% to react for 1.5 hours, dry, and discharge to obtain self-made linear alkylbenzene sulfonate, measure 25 mL of polyether, 40 mL of 10% mass fraction The sodium carbonate solution was mixed and stirred for 4 minutes, and after stirring, 4g of ethylenediaminetetraacetic acid was added, mixed and stirred for 14 minutes, and heated to 40°C to obtain a self-made mixed solution. 11g of quartz sand was weighed and g...

example 3

[0027] Pour 10mL of ethylene into 30mL of toluene, then add 7g of aluminum chloride, heat up to 75°C and react for 2h, add anhydrous magnesium sulfate to dry and distill for 45min, filter and remove the filter residue to obtain self-made alkylbenzene, the volume ratio is 1: 2:3 Mix sulfuric acid solution with a concentration of 1.5mol / L, 1,2-dichloroethane and self-made alkylbenzene in a beaker, react at 24°C for 2 hours, then add 10mL deionized water, and continue the heat preservation reaction 4h, after the reaction, add 18mL of 25% sodium hydroxide solution to react for 2h, dry, and discharge to obtain self-made linear alkylbenzene sulfonate, measure 30mL of polyether 45mL of 10% sodium carbonate solution Mix and stir for 5 minutes. After stirring, add 5g of ethylenediaminetetraacetic acid, mix and stir for 16 minutes, and heat up to 45°C to obtain a self-made mixed solution. Weigh 12g of quartz sand and grind it for 10 minutes to obtain quartz sand powder. The mass ratio is...

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Abstract

The invention relates to the technical field of preparation of foaming agents used for oil recovery in an oil reservoir, and in particular relates to a preparation method for a temperature-resistant salt-tolerant oil-displacing foaming agent. According to the method provided by the invention, firstly a reaction is performed to obtain a linear alkyl benzene sulfonate, the linear alkyl benzene sulfonate is compounded with alkyl diphenyl ether sodium disulfonate and polyacrylamide to obtain a novel substance, so that thermal stability is enhanced, and the temperature resistance and salt toleranceof the oil-displacing foaming agent are improved; a hydrogen bond is easily formed in polyacrylamide, so that the mineralization resistance and salt tolerance of the substance are improved; a titanate coupling agent is used to modify quartz sand powder, and the modified quartz sand powder, yeast powder and white sugar are subjected to fermentation together, so that the temperature resistance of the alkyl benzene sulfonate is enhanced at the high temperature, and the temperature resistance of the oil-displacing foaming agent is improved; and a polyether, a sodium carbonate solution and a sulfonated castor oil foam stabilizer are added, so that the salt tolerance of the foaming agent can be enhanced, the stability of foam is improved, the temperature resistance and salt tolerance of the oil-displacing foaming agent are further improved, and the oil-displacing foaming agent has broad application prospects.

Description

technical field [0001] The invention relates to the technical field of preparation of a foam agent for oil recovery in oil reservoirs, in particular to a preparation method of a temperature-resistant and salt-resistant oil displacement foam agent. Background technique [0002] Commonly used foaming agents, also known as blowing agents, refer to the ability to reduce the surface tension of a liquid and produce a large amount of uniform and stable foam. The foaming agent can make its aqueous solution produce a large amount of foam when mechanical force is introduced into the air. It is a surfactant or a surface active substance. The essence is its surface activity, and surface activity is the core of foaming. The application research and exploration of foam agent in oilfield has a history of more than 40 years, such as foam flooding, foam drilling, foam cement solidification, foam acid-alkaliization, etc. It is a low-cost and promising method. With the rapid development of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/58
CPCC09K8/58
Inventor 杨立军张淑娴林大伟
Owner 王敏
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