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Preparation method for furfural extract oil sulfonate used for oil displacement

A technology for extracting oil and oil sulfonate from furfural, which is applied to chemical instruments and methods, compositions of drilling holes, etc., can solve problems such as poor compatibility, inability to greatly improve oil recovery, inability to achieve ultra-low interfacial tension, and the like, Achieving a good application effect

Inactive Publication Date: 2018-01-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for high-temperature and high-salt reservoirs, the compatibility of the above two types of surfactants with the formation is poor, and it is impossible to achieve ultra-low interfacial tension, and thus cannot greatly increase the recovery factor.

Method used

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  • Preparation method for furfural extract oil sulfonate used for oil displacement
  • Preparation method for furfural extract oil sulfonate used for oil displacement
  • Preparation method for furfural extract oil sulfonate used for oil displacement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1), the preparation of intermediate furfural extraction oil sulfonic acid

[0021] Add the furfural extracted oil into the four-necked bottle, start the stirring, raise the temperature to 40°C, and inject SO with a concentration of 5%. 3 Mixed gas for sulfonation reaction, react for 1 hour, stop feeding SO 3 , keep the reaction temperature, aging for 1.5 hours, the intermediate product sulfonic acid is obtained.

[0022] (2), preparation of furfural extraction oil sulfonate

[0023] Control the temperature of the four-neck flask at 35°C, start stirring, slowly add NaOH solution with a concentration of 15% to the intermediate product, adjust the pH value to 8-9, continue stirring for 1 hour, and after removing water and drying, the product furfural is extracted Oil sulfonate.

[0024] (3), interfacial tension test

[0025] Oil displacement system: a system composed of furfural extracted oil sulfonate and coconut oil fatty acid diethanolamide (6501) at a mass ratio o...

Embodiment 2

[0035] (1), the preparation of intermediate furfural extraction oil sulfonic acid

[0036] Add the furfural extracted oil into the four-necked bottle, start the stirring, raise the temperature to 45°C, and feed in SO with a concentration of 8%. 3 Mixed gas for sulfonation reaction, react for 1 hour, stop feeding SO 3 , keep the reaction temperature, aging for 1.5 hours, the intermediate product sulfonic acid is obtained.

[0037] (2), preparation of furfural extraction oil sulfonate

[0038] Control the temperature of the four-neck flask at 30°C, start stirring, slowly add NaOH solution with a concentration of 15% to the intermediate product, adjust the pH value to 8-9, continue stirring for 1 hour, and after removing water and drying, the product furfural is extracted Oil sulfonate.

[0039] (3), interfacial tension test

[0040] Oil displacement system: a system composed of furfural extracted oil sulfonate and coconut oil fatty acid diethanolamide (6501) at a mass ratio ...

Embodiment 3

[0050] (1), the preparation of intermediate furfural extraction oil sulfonic acid

[0051] Add the furfural extracted oil into the four-necked bottle, start the stirring, raise the temperature to 40°C, and feed in SO with a concentration of 10%. 3 Mixed gas for sulfonation reaction, react for 2 hours, stop feeding SO 3 , keep the reaction temperature, aging for 1 hour, the intermediate product sulfonic acid is obtained.

[0052] (2), preparation of furfural extraction oil sulfonate

[0053] Control the temperature of the four-necked flask at 35°C, turn on the stirring, slowly add NaOH solution with a concentration of 15% to the intermediate product, adjust the pH value to 8-9, continue stirring for 0.5 hours, and after dehydration and drying, the product furfural is extracted Oil sulfonate.

[0054] (3), interfacial tension test

[0055] Oil displacement system: a system composed of furfural extracted oil sulfonate and coconut oil fatty acid diethanolamide (6501) at a mass...

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Abstract

The invention relates to a preparation method for furfural extract oil sulfonate used for oil displacement. The preparation method comprises the following two steps: (1) adding furfural extract oil into a four-neck flask, allowing temperature to rise to 20-60 DEG C, introducing SO3 with a concentration of 3-10% for a sulfonation reaction for 0.5-3 hours, stopping introduction of SO3, maintaining the reaction temperature and continuing the reaction for 1-3 hours to obtain the intermediate sulfonic acid; and (2) controlling the temperature to be in a range of 30-55 DEG C, dropwise adding a NaOHsolution with a concentration of 5-30% into the intermediate product, and carrying out a reaction for 0.5-1 hour so as to obtain the furfural extract oil sulfonate. The furfural extract oil sulfonatefor oil displacement prepared in the invention and coconut oil fatty acid diethanolamide (6501) in a mass ratio of 1: 1-1.5 form a flooding system; and according to results of indoor simulation, an oil recovery rate can be enhance by 18 .2%, so good application effect is obtained.

Description

technical field [0001] The invention relates to the technical field of tertiary oil recovery, in particular to a furfural-extracted oil sulfonate surfactant suitable for high-temperature oil reservoir flooding and a preparation method thereof. Background technique [0002] In oil field development, even in the most ideal reservoir, traditional primary oil recovery (using the natural energy of the reservoir) and secondary oil recovery (water injection or gas injection, etc.) can only recover 40%-60% of the original crude oil reserves; If the formation conditions are not ideal, even 80% of the original geological reserves remain underground after primary and secondary oil recovery. [0003] The tertiary oil recovery technology that has been used now is to use physical or chemical methods to extract. There are many kinds of surfactants used in tertiary oil recovery at home and abroad, and petroleum sulfonate synthesized from petroleum distillate oil is widely used in tertiary ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584
Inventor 曾志强袁俊秀杨智中黄冬
Owner CHINA PETROLEUM & CHEM CORP
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