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A kind of preparation method of microbial surfactant synergist

A surfactant and synergist technology, applied in chemical instruments and methods, drilling compositions, bacteria, etc., can solve problems such as high molecular weight of surfactants, difficulty in processing produced fluid, and clogging of low-permeability reservoirs. Achieve the effect of small molecular weight, low cost, and reduce injection cost

Active Publication Date: 2021-12-07
TIANJIN DAGANG OILFIELD BINGANG GRP BOHONG PETROLEUM CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the surfactants used are compound products of petroleum sulfonate and chemically synthesized surfactant. Complicated, chromatographic separation is prone to occur in the process of compatible use with polymers, which affects the use effect, and at the same time, the residues bring certain difficulties to the production fluid treatment

Method used

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  • A kind of preparation method of microbial surfactant synergist
  • A kind of preparation method of microbial surfactant synergist
  • A kind of preparation method of microbial surfactant synergist

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) The preparation method of microbial surfactant synergist is:

[0034] Dissolve 1 g of peptone, 0.4 g of yeast extract, 0.1 g of potassium dihydrogen phosphate, 0.1 g of diammonium citrate, 1.5 g of agarose, and 0.2 g of DNA polymerase in 100 g of water, and stir well to control the pH value to 6. Sterilize at 15mim at ℃ to prepare the culture medium. Collect a certain amount of oilfield produced water, transport it to the room in a low-temperature incubator, and store it at a low temperature of 0-4°C. Take a small amount of extracted water and put them into culture vessels with culture medium, place them airtightly at 35°C, and activate them for 24 hours to activate and enrich the bacteria. After activation, each ml of liquid medium contains 2.5×10 highly active spores. 2 cfu, to prepare the fermentation broth containing the strain.

[0035] Based on a total volume of 200mL, measure 30mL of fermentation broth containing strains and 50mL of α-dodecene sulfonate, mi...

Embodiment 2

[0042] (1) The preparation method of microbial surfactant synergist is:

[0043] Dissolve 1.5g of peptone, 0.5g of yeast extract, 0.2g of potassium dihydrogen phosphate, 0.2g of diammonium citrate, 2.0g of agarose, and 0.3g of DNA polymerase in 100g of water, and stir evenly to control the pH value to 6. Sterilize at 115°C for 20mim to prepare a culture medium. Collect a certain amount of oilfield produced water, transport it to the room in a low-temperature incubator, and store it at a low temperature of 0-4°C. Take a small amount of extracted water and put them into culture vessels with culture medium, place them airtightly at 36°C, and activate them for 30 hours to activate and enrich the bacteria. After activation, each ml of liquid medium contains 2.7×10 highly active spores. 2 cfu, to prepare the fermentation broth containing the strain.

[0044]Based on a total volume of 200mL, measure 40mL of fermentation broth containing strains and 50mL of α-dodecene sulfonate, mix...

Embodiment 3

[0051] (1) The preparation method of microbial surfactant synergist is:

[0052] Dissolve 2g of peptone, 0.6g of yeast extract, 0.3g of potassium dihydrogen phosphate, 0.3g of diammonium citrate, 2.5g of agarose, and 0.4g of DNA polymerase in 100g of water, and stir well to control the pH value to 6.5 and keep the temperature Sterilize at 120°C for 20mim to prepare a culture medium. Collect a certain amount of oilfield produced water, transport it to the room in a low-temperature incubator, and store it at a low temperature of 0-4°C. Take a small amount of extracted water and put them into culture vessels with culture medium, place them airtightly at 37°C, and activate them for 36 hours to activate and enrich the bacteria. After activation, each ml of liquid medium contains 3.0×10 highly active spores. 2 cfu, to prepare the fermentation broth containing the strain.

[0053] Based on a total volume of 200mL, measure 35mL of fermentation broth containing strains and 45mL of α-...

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Abstract

The invention discloses a method for preparing a microbial surface active synergist. The method is to prepare a fermented liquid containing strains from oilfield produced water, and add the fermented liquid containing strains and α-olefin sulfonate to a four-necked flask Add naphthalene, heat and stir, add the catalyst, stir the reaction, cool and dry to obtain the biological single-chain synergist, add the fermentation broth containing the bacteria and α-olefin sulfonate into the four-necked flask, Then add biological type single-chain synergist, heat and stir, add catalyst, stir and react, cool and dry to obtain microbial surface active synergist. The microbial surface active synergist of the present invention has a small molecular weight, is easy to penetrate in low-permeability and ultra-low-permeability reservoirs, does not block the formation, has certain temperature and salt resistance, can effectively protect the formation, does not scale, and is non-toxic It is a non-toxic, safe and environmentally friendly product, which has a synergistic effect on the surface activity of the poly-surfactant composite flooding system, can improve the use efficiency of various surfactants currently in use, and save the overall injection cost.

Description

technical field [0001] The invention relates to the technical field of oil recovery, in particular to a preparation method of a microbial surface active synergist. Background technique [0002] At present, the polymer-surfactant binary composite flooding system is widely promoted in various oilfields. The polymer-surfactant composite flooding system can organically combine the advantages of surfactants and polymers, so that it can effectively reduce the oil-water interfacial tension and improve the flooding efficiency. The oil efficiency is increased, and the swept volume is increased at the same time, and finally the expected effect of enhanced oil recovery is achieved. However, most of the surfactants used are compound products of petroleum sulfonate and chemically synthesized surfactant. Complicated, chromatographic separation is prone to occur in the process of compatible use with polymers, which affects the use effect, and at the same time, the residues bring certain d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/584C12N1/20
CPCC09K8/584C12N1/20
Inventor 刘存辉石昀朱卓岩杨怀军庞玉山韩英波孙凤萍庄永涛刘洁胡良义
Owner TIANJIN DAGANG OILFIELD BINGANG GRP BOHONG PETROLEUM CHEM
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