Dimethyl-monoperfluorodecyl silicon-polyethoxyl-oleate poly-compound, preparation method and application thereof

A technology of perfluorodecyl and polyethoxy is applied in the field of foam oil displacement agents, which can solve the problems of chromatographic separation, weakening and loss of synergistic effect of components, etc., and achieves simple preparation method, promotion of foaming effect, and foam stabilization effect. good effect

Inactive Publication Date: 2018-10-23
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, most of the above-mentioned oil displacement agents are mixed reagents. Migration in the formation will cause differences in migration speed due to differences in molecular structure and polarity, resulting in chromatographic separation, resulting in weakened or even lost synergistic effects of various components.

Method used

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  • Dimethyl-monoperfluorodecyl silicon-polyethoxyl-oleate poly-compound, preparation method and application thereof
  • Dimethyl-monoperfluorodecyl silicon-polyethoxyl-oleate poly-compound, preparation method and application thereof
  • Dimethyl-monoperfluorodecyl silicon-polyethoxyl-oleate poly-compound, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The dimethyl-monoperfluorodecyl silicon-polyethoxy-oleate multi-component compound of the present invention has a structural formula of:

[0026]

[0027] Among them, n=10-18.

[0028] The preparation method includes the following steps: first, 50 g of perfluorodecane and 12 g of dimethylfluorosilane are placed in a reactor, protected by nitrogen gas, and stirred and reacted at 60° C. for 1.5 h; secondly, concentrated sulfuric acid is added to the system, and the temperature is raised to to 150°C, slowly add 60g of ethylene oxide, and continue to react for 1.5h; again, cool down to about 100°C, add 28g of oleic acid to react for 1.5h; finally, add sodium hydroxide to adjust the pH value to 9, and the product Invented multi-component compound.

[0029] When the multi-component compound prepared in this example is applied to oil displacement, the surface observation, foaming and foam stabilizing properties of its oil-based foam are characterized, and the obtained resu...

Embodiment 2

[0032] The dimethyl-monoperfluorodecyl silicon-polyethoxy-oleate multi-component compound of the present invention has a structural formula of:

[0033]

[0034] Among them, n=6-14.

[0035]The preparation method includes the following steps: first, 50 g of perfluorodecane and 9.4 g of dimethylfluorosilane are placed in a reactor, protected by nitrogen gas, and stirred at 60° C. for 1.5 h; secondly, concentrated sulfuric acid is added to the system, Raise the temperature to 150°C, slowly add 40g of ethylene oxide, and continue the reaction for 1.5h; again, cool down to about 100°C, add 25g of oleic acid to react for 1.5h; finally, add sodium hydroxide to adjust the pH value to 8.5 to obtain Multi-component compounds of the present invention.

Embodiment 3

[0037] The dimethyl-monoperfluorodecyl silicon-polyethoxy-oleate multi-component compound of the present invention has a structural formula of:

[0038]

[0039] Among them, n=12-16.

[0040] The preparation method includes the following steps: first, 50 g of perfluorodecane and 9.4 g of dimethylfluorosilane are placed in a reactor, protected by nitrogen gas, and stirred at 60° C. for 1.5 h; secondly, concentrated sulfuric acid is added to the system, Raise the temperature to 150°C, slowly add 55g of ethylene oxide, and continue the reaction for 1.5h; again, cool down to about 100°C, and add 26g of oleic acid to react for 1.5h; finally, add sodium hydroxide to adjust the pH value to 8 to obtain Multi-component compounds of the present invention.

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Abstract

The invention discloses a dimethyl-monoperfluorodecyl silicon-polyethoxyl-oleate poly-compound, a preparation method and an application thereof, wherein the poly-compound is prepared by compounding perfluorodecane, dimethylfluorosilane, ethylene oxide and oleic acid. The preparation method includes the steps of: mixing the perfluorodecane with the dimethylfluorosilane, performing acidification, heating the mixture to 150-170 DEG C, adding the ethylene oxide to perform a reaction, adding the oleic acid, and regulating pH value to 8-9.5. The poly-compound is applied to oil field for foam displacement of oil. The poly-compound can produce foams at high efficient, has good foam stabilizing effect, is free of chromatographic separation during migration of stratum, and especially has better foamdisplacement effect in low-permeable and water-sensitive oil fields. The preparation method is simple, has great operability and is low in cost.

Description

technical field [0001] The invention belongs to the field of foam oil displacement agents, and in particular relates to a dimethyl-monoperfluorodecyl silicon-polyethoxy-oleic acid ester multi-component compound and its preparation method and application. Background technique [0002] Foam fluid has been used in the development of oil fields for more than 40 years at home and abroad. Wells, drilling, profile control, water plugging, acidification, cement cementing and fracturing have been applied in many aspects of oil and gas field development, and have achieved positive results. A large number of practices have shown that foam flooding is an important means to protect oil layers, prevent oil layer pollution, and increase oil and gas production. With the continuous improvement of people's recognition of foam technology, foam flooding means and foam flooding agent will become one of the main technologies of tertiary oil recovery. There are a large number of low-permeability...

Claims

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Application Information

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IPC IPC(8): C07F7/08C08G65/26C08G65/332C09K8/584
CPCC09K8/584C07F7/0827C08G65/2639C08G65/3322C08G2650/04
Inventor 沈健王达炜章峻侯庆锋周宁琳杨仲斌金锐赵越付磊冯福玲何磊莫宏
Owner NANJING NORMAL UNIVERSITY
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