Sulfonated naphthol bola-type surfactant for heavy oil reservoir flooding and its synthesis method and application

A technology of surfactant and sulfonated naphthol, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problems of high oil displacement cost of surfactants, difficulty in heavy oil recovery, etc. The effect of water-oil mobility ratio, enhanced sweep capacity, and enhanced oil recovery

Active Publication Date: 2022-07-15
甘肃智仑新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For the surfactant flooding technology, the traditional surfactant is composed of a hydrophobic chain and a hydrophilic polar head, which has a small area on the surface of the solution, and the injection of the surfactant into the oil layer will affect the area of ​​the oil layer. At the same time, in practice, it is found that the cost of surfactant flooding is high, and heavy oil production is difficult

Method used

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  • Sulfonated naphthol bola-type surfactant for heavy oil reservoir flooding and its synthesis method and application
  • Sulfonated naphthol bola-type surfactant for heavy oil reservoir flooding and its synthesis method and application
  • Sulfonated naphthol bola-type surfactant for heavy oil reservoir flooding and its synthesis method and application

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preparation example Construction

[0028] Concretely, a kind of preparation method of sulfonated naphthol Bola-type surfactant for oil displacement of heavy oil reservoir, comprising the following steps:

[0029] (1) Mix 6-methyl-1-naphthol, isophorone diisocyanate (IPDI) and a catalyst, the moles of the 6-methyl-1-naphthol and isophorone diisocyanate (IPDI) The ratio is 2:(1~1.10); the catalyst is dibutyltin dilaurate, and the addition amount is 0.5wt%. Be warming up to 60~100 ℃, react 8~12 hours, obtain intermediate;

[0030] (2) Add concentrated sulfuric acid and a solvent to the intermediate, and the solvent is dichloromethane; the mass fraction of the concentrated sulfuric acid is 98%; the molar ratio of the intermediate to the 98% concentrated sulfuric acid is 1:2.05. The reaction was carried out at normal temperature, and the reaction time was 30 minutes to obtain a crude product;

[0031] (3) The crude product was vacuum-dried and dissolved in ethyl acetate. The ester layer was washed with water and s...

Embodiment 1

[0035] A mixture of 6-methyl-1-naphthol and isophorone diisocyanate (IPDI) in a molar ratio of 2:1 and dibutyltin dilaurate 0.5 wt % was added to the flask, heated to 100° C., and reacted for 10 hours. to obtain intermediates. The molar ratio of the intermediate and the mass fraction of 98% concentrated sulfuric acid is 1:2.05. The reaction was carried out at normal temperature and the reaction time was 30 minutes to obtain a crude product. The crude product was dried in vacuo and dissolved in ethyl acetate. The ester layer was washed with water and saturated brine respectively, and dried over anhydrous MgSO4. The ethyl acetate was evaporated under reduced pressure and dried in vacuo to obtain the product. The product is sulfonated 6-methyl-1-naphthol Bola-type surfactant. First, the core is saturated with simulated formation water, the permeability of the core is measured, and then the crude oil is saturated. After standing for 24 hours at the simulated formation temperat...

Embodiment 2

[0037]A mixture of 6-methyl-1-naphthol and isophorone diisocyanate (IPDI) in a molar ratio of 2:1 and dibutyltin dilaurate 0.5wt% was added to the flask, the temperature was raised to 80°C, and the reaction was carried out for 10 hours. to obtain intermediates. The molar ratio of the intermediate and the mass fraction of 98% concentrated sulfuric acid is 1:2.05. The reaction was carried out at normal temperature and the reaction time was 30 minutes to obtain a crude product. The crude product was dried in vacuo and dissolved in ethyl acetate. The ester layer was washed with water and saturated brine respectively, and dried over anhydrous MgSO4. The ethyl acetate was evaporated under reduced pressure and dried in vacuo to obtain the product. The product is sulfonated 6-methyl-1-naphthol Bola-type surfactant. First, the core is saturated with simulated formation water, the permeability of the core is measured, and then the crude oil is saturated. After standing for 24 hours ...

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Abstract

The invention discloses a sulfonated naphthol bola-type surfactant for oil displacement in heavy oil reservoirs and a synthesis method and application thereof. The method comprises: mixing 5-methyl-1-naphthol, isophorone diisocyanate (IPDI) mixed with the first catalyst. The temperature is raised to 60-100°C, and the reaction is carried out for 8-12 hours to obtain an intermediate. To the intermediate was added concentrated sulfuric acid, the first solvent. The reaction was carried out at room temperature and the reaction time was 30 minutes to obtain a crude product. The crude product was dried in vacuo and dissolved in ethyl acetate. The ester layer was washed with water and saturated brine respectively, and dried over anhydrous MgSO4. The ethyl acetate was evaporated under reduced pressure and dried in vacuo to obtain the product. The present invention is based on the problems faced by the present heavy oil exploitation, and is designed and utilized to prepare a high-efficiency Bola type surfactant by using naphthol with lower value as a raw material, so as to improve the heavy oil recovery rate.

Description

technical field [0001] The invention relates to the preparation of a surfactant, in particular to a sulfonated naphthol bola-type surfactant for oil displacement in heavy oil reservoirs and a synthesis method and application thereof. Background technique [0002] Bola-type surfactant is a new type of functional surfactant. On the one hand, traditional surfactants are composed of a hydrophobic chain and a hydrophilic polar head, while bola-type surfactants are composed of two hydrophilic polar groups connected to one or two hydrophobic chains. On the other hand, due to the special structure of two hydrophilic groups, Bola-type surfactants not only have the basic properties of wetting, emulsifying, and washing that traditional surfactants have, but also have unique properties. Surface properties, aggregation and self-assembly behavior, and ability to form stable monolayer lipid films and vesicles. For the surfactant flooding technology, the traditional surfactant is composed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C309/43C07C303/22C07C303/44C09K8/584C09K8/60E21B43/22
CPCC07C309/43C07C303/22C07C303/44C09K8/584C09K8/602E21B43/16C07C2601/14
Inventor 王晨徐静杨晓武张康
Owner 甘肃智仑新材料科技有限公司
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