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A kind of processing method of rhamnolipid fermented liquor of oil field oil displacement agent

A technology of rhamnolipid and fermented liquid, which is applied in the direction of chemical instruments and methods, sugar derivatives, sugar derivatives, etc., can solve the problems of sandstone adsorption, oil displacement effect, high solid content, etc., and achieve low surface tension and The effect of interfacial tension, good salt resistance, and good temperature resistance

Active Publication Date: 2022-03-08
陕西斯普曼生物工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many types of biosurfactants, the industrial products are very single
Rhamnolipid is an important biosurfactant that has been industrially produced at present. Its main application field is exactly the oil displacement agent used in petroleum development, but the fermentation yield of rhamnolipid is low (3%), and the production process control It is difficult (foaming) and difficult to separate and purify (extraction), so the cost of the finished product is high. For oil displacement agents, rhamnolipid fermentation broth is often used directly on site, but because of its complex composition, high solid content, and high sandstone adsorption, The oil displacement effect has been affected to a certain extent

Method used

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  • A kind of processing method of rhamnolipid fermented liquor of oil field oil displacement agent
  • A kind of processing method of rhamnolipid fermented liquor of oil field oil displacement agent
  • A kind of processing method of rhamnolipid fermented liquor of oil field oil displacement agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A method for reducing the adsorption of rhamnolipid fermentation broth, comprising the following steps:

[0040] The content of rhamnolipid in the rhamnolipid fermentation broth with soybean oil as carbon source is about 50g / L, and the fermentation broth is separated by a butterfly centrifuge at a speed of 6600rpm to obtain the fermentation broth and sediment;

[0041] Then use a 100nm ceramic membrane to filter the fermentation broth to obtain a filtrate and a concentrate;

[0042] The precipitate and the concentrated solution are wet ground to obtain a 10-80nm nanoscale solid mixture;

[0043] Mix the nanoscale solid mixture and the filtrate evenly, and perform low-intensity ultrasonic treatment for 15 minutes. The ultrasonic conditions are: power 200W, frequency 30KHz, and the new surfactant is obtained.

Embodiment 2

[0045] A method for reducing the adsorption of rhamnolipid fermentation broth, comprising the following steps:

[0046] The rhamnolipid content in the rhamnolipid fermentation broth using corn oil as a carbon source is about 55g / L, and the fermentation broth is separated by a butterfly centrifuge at a speed of 6600rpm to obtain the fermentation broth and sediment;

[0047] Then use a 200nm ceramic membrane to filter the fermentation broth to obtain a filtrate and a concentrated solution;

[0048] Use the nano-microbe cell disruptor to obtain the 10-80nm nano-scale solid mixture;

[0049] Mix the nano-scale solid mixture and the filtrate evenly, and perform low-intensity ultrasonic treatment for 10 minutes. The ultrasonic conditions are: power 300W, frequency 40KHz, to obtain a new type of surfactant.

Embodiment 3

[0051] A method for reducing the adsorption of rhamnolipid fermentation broth, comprising the following steps:

[0052] The content of rhamnolipid in the rhamnolipid fermentation broth with soybean oil as carbon source is about 45g / L, and the fermentation broth is separated by a butterfly centrifuge at a speed of 8000rpm to obtain the fermentation broth and sediment;

[0053] Then use a 500nm ceramic membrane to filter the fermentation broth to obtain a filtrate and a concentrated solution;

[0054] The precipitate and the concentrated solution are wet ground to obtain a 10-80nm nanoscale solid mixture;

[0055] Mix the nano-scale solid mixture and the filtrate evenly, and perform low-intensity ultrasonic treatment for 10 minutes. The ultrasonic conditions are: power 500W, frequency 50KHz, and the new surfactant is obtained.

[0056] Determination of the properties of the surfactant of Example 1

[0057] Taking rhamnolipid as a measure standard, the surfactant of embodiment ...

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Abstract

The present invention relates to a kind of processing method of rhamnolipid fermented liquid of oil-displacing agent, comprising the following steps: (1) centrifuging rhamnolipid fermented liquid to obtain fermented liquid and precipitation layer; (2) step (1) The fermented liquid in ) is concentrated by ceramic membrane filtration, and after the concentration is completed, the filtrate and the concentrated liquid are obtained respectively; (3) the precipitated layer in the step (1) and the concentrated liquid in the step (2) are treated to nanoscale, Obtain a nanoscale particle mixture in the range of 10 to 80nm; (4) mix the nanoscale particle mixture in step (3) with the filtrate in step (2), and perform low-intensity ultrasonic treatment; obtain a A complex surfactant. The surfactant not only has low surface tension and interfacial tension, good temperature resistance and salt resistance, but also can significantly reduce the adsorption of rock to it, and has high oil displacement efficiency as an oil displacement agent.

Description

technical field [0001] The invention relates to a treatment method for reducing the adsorption of rhamnolipid sandstone in an oil-displacing agent in an oil field and improving the oil-displacing efficiency of the oil-displacing agent, and belongs to the technical field of surfactant oil-displacement in tertiary oil recovery engineering in oil fields. Background technique [0002] The information disclosed in this background section is only intended to increase some understanding of the general background of the present invention, and is not necessarily to be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Rhamnolipid is a biosurfactant. Biosurfactants are surface-active metabolites secreted by microorganisms in the metabolic process when cultured under certain conditions, such as glycolipids, lipopeptides, and lipid derivatives. They were first discovered in the 1960s....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07H1/06C07H15/04C09K8/584
CPCC09K8/584C07H15/04C07H1/06
Inventor 魏战胜杜建平居迎军孙引雀李艳周晓刘佳
Owner 陕西斯普曼生物工程有限公司