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Low-cost environment-friendly surfactant and preparation method thereof

A surfactant and environment-friendly technology, applied in the field of low-cost environment-friendly surfactants and their preparation, can solve the problems of poor salt resistance, poor calcium and magnesium ion resistance, insufficient temperature resistance, etc., and achieve low cost and molecular weight. Low, low interfacial tension effect

Inactive Publication Date: 2021-04-09
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

[0005] Aiming at the deficiencies of the prior art, the present invention provides a low-cost environment-friendly surfactant and a preparation method thereof, which solves three major problems existing in the use of currently used surfactants in the tertiary oil recovery process: one is poor salt tolerance, In particular, the resistance to calcium and magnesium ions is poor. Second, the temperature resistance is insufficient. At present, the surface and interface performance of surfactants in harsh oil reservoirs such as high temperature, high salinity, and low permeability cannot meet the requirements of enhanced oil recovery. Third, the residues are not easy to degrade , which brings a certain degree of difficulty to the production fluid treatment

Method used

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  • Low-cost environment-friendly surfactant and preparation method thereof
  • Low-cost environment-friendly surfactant and preparation method thereof

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Experimental program
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Embodiment 1

[0026] The embodiment of the present invention provides a kind of low-cost environment-friendly surfactant, wherein the material is made up of following components by weight: ricinoleamidopropyl betaine (effective content 98%) 100g, lauric acid diethanolamide (effective content 99%) %) 20g, dirhamnolipid (effective content 50%) 50g, tap water 180g.

[0027] Wherein the preparation method is as follows:

[0028] S1. Select ricinoleamidopropyl betaine and lauric acid diethanolamide according to the weight ratio and place them in a 500ml beaker and stir for 20-30min with a magnetic stirrer;

[0029] S2. After stirring evenly, add dirhamnolipids of equal weight ratio and continue stirring for 10 minutes;

[0030] S3. Finally, add tap water in an equal weight ratio and stir for 10-20 minutes to obtain the finished product.

[0031] Wherein the preparation method of ricinoleamidopropyl betaine is:

[0032] S1. Based on the total mass of 200g, measure 80g of castor oil and 105g of...

Embodiment 2

[0038] The embodiment of the present invention provides a kind of low-cost environment-friendly surfactant, wherein the material is made up of following components by weight: ricinoleamidopropyl betaine (effective content 98%) 100g, lauric acid diethanolamide (effective content 99%) %) 20g, dirhamnolipid (effective content 50%) 50g, tap water 180g.

[0039] Wherein the preparation method is as follows:

[0040] S1. Select ricinoleamidopropyl betaine and lauric acid diethanolamide according to the weight ratio and place them in a 500ml beaker and stir for 20-30min with a magnetic stirrer;

[0041] S2. After stirring evenly, add dirhamnolipids of equal weight ratio and continue stirring for 10 minutes;

[0042] S3. Finally, add tap water in an equal weight ratio and stir for 10-20 minutes to obtain the finished product.

[0043] Wherein the preparation method of ricinoleamidopropyl betaine is:

[0044]S1. Based on the total mass of 200g, measure 85g of castor oil and 100g of ...

Embodiment 3

[0050] The embodiment of the present invention provides a kind of low-cost environment-friendly surfactant, wherein the material is made up of following components by weight: ricinoleamidopropyl betaine (effective content 98%) 100g, lauric acid diethanolamide (effective content 99%) %) 20g, dirhamnolipid (effective content 50%) 50g, tap water 180g.

[0051] Wherein the preparation method is as follows:

[0052] S1. Select ricinoleamidopropyl betaine and lauric acid diethanolamide according to the weight ratio and place them in a 500ml beaker and stir for 20-30min with a magnetic stirrer;

[0053] S2. After stirring evenly, add dirhamnolipids of equal weight ratio and continue stirring for 10 minutes;

[0054] S3. Finally, add tap water in an equal weight ratio and stir for 10-20 minutes to obtain the finished product.

[0055] Wherein the preparation method of ricinoleamidopropyl betaine is:

[0056] S1. Based on the total mass of 200g, measure 90g of castor oil and 95g of ...

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Abstract

The invention provides a low-cost environment-friendly surfactant and a preparation method thereof, and relates to the field of research of surfactant oil displacement agents for improving the recovery ratio of tertiary oil recovery. The low-cost environment-friendly surfactant is prepared from the following components in parts by weight: 100-110g of castor oil acylaminopropyl betaine (the effective content is 98%), 20-30g of lauroyl diethanolamide (the effective content is 99%), 50-60g of double rhamnolipid (the effective content is 50%) and 180-190g of tap water. The low-cost environment-friendly surfactant disclosed by the invention belongs to a bio-based zwitterionic surfactant, has the characteristics of anions and cations, can resist stratum adsorption and dilution, has certain temperature resistance and salt resistance, and has interfacial tension of 10<-3>mN / m under a high-temperature and high-salinity oil reservoir (80 DEG C or above and the mineralization degree of 10000ppm or above), and if the surfactant is compounded with petroleum sulfonate surfactants, the interfacial tension is lower, and the effect of improving the recovery ratio is obvious.

Description

technical field [0001] The invention relates to the research field of surface-active oil-displacing agents for enhanced oil recovery in tertiary oil recovery, in particular to a low-cost and environment-friendly surfactant and a preparation method thereof. Background technique [0002] With the rapid development of surfactant flooding technology, major oilfields across the country have promoted poly-surface binary compound flooding and poly-surface base three-component compound flooding systems on a large scale. Surfactants used for oil flooding at home and abroad mainly include: petroleum sulfonic acid Salt, alkylbenzene sulfonate, olefin sulfonate, etc. At present, the limit of environmental factors that surfactant flooding technology can withstand in the world is: temperature 95°C, salinity 50000mg / L, and crude oil saturation greater than 30%. [0003] With the deepening of the exploitation of old oilfields, the deeper the oil production formation, the higher the tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C11C3/00B01F17/32B01F17/34B01F17/44B01F17/22B01F17/28C09K23/22C09K23/28C09K23/32C09K23/34C09K23/44
CPCC09K8/584C11C3/00C09K23/018C09K23/017
Inventor 刘存辉王志宏石昀周传臣王欢孙凤萍兰海宽毛艳妮高磊陈芝娟张凤跃贾云霞陈颖吴海宁刘杰
Owner TIANJIN DAGANG OILFIELD BINGANG GRP BOHONG PETROLEUM CHEM
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