Microemulsion multifunctional nano oil displacement agent as well as preparation method and application thereof

A multi-functional, microemulsion technology, applied in chemical instruments and methods, organic chemistry, drilling compositions, etc., can solve problems such as poor storage stability, unsatisfactory effect, and ineffective oil displacement agent

Active Publication Date: 2022-05-06
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing oil-displacing agents often fail to achieve the desired effect, and for some oil-displacing agents in the form of compound formulations, there are often problems such as poor long-term storage stability and unsatisfactory effects in the reservoir during actual use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This embodiment provides a microemulsion multifunctional nano oil displacing agent, wherein the microemulsion multifunctional nano oil displacing agent comprises:

[0041]Nano silicon dioxide 10kg, diphenyl ether gemini surfactant 50kg, isothiazolinone derivatives 10kg, hyperbranched emulsified wetting and dispersing agent (model 31818 produced by Henan Daochun Chemical Technology Co., Ltd.) 5kg, Polyvinyl alcohol 1kg, dodecane 40kg, tetradecane 20kg and water 80kg.

[0042] Wherein, the diphenyl ether-based gemini surfactant is (octylphenol polyoxyethylene ether disubstituted) diphenyl ether diformate surfactant, which firstly makes 4,4'-diphenyl ether dicarboxylate carry out acyl chloride Reaction to obtain 4,4'-diformyl chloride diphenyl ether, and then make 4,4'-diformyl chloride diphenyl ether and octylphenol polyoxyethylene ether to undergo esterification reaction.

[0043] Wherein, the structural formula of the isothiazolinone derivative is The isothiazolinone...

Embodiment 2

[0047] This embodiment provides a microemulsion multifunctional nano oil displacing agent, wherein the microemulsion multifunctional nano oil displacing agent comprises:

[0048] Nano silicon dioxide 35kg, diphenyl ether gemini surfactant 30kg, isothiazolinone derivatives 20kg, hyperbranched emulsified wetting and dispersing agent (model 31818 produced by Henan Daochun Chemical Technology Co., Ltd.) 1kg, Polyvinyl alcohol 3kg, dodecane 30kg, tetradecane 35kg and water 50kg.

[0049] Wherein, the diphenyl ether-based gemini surfactant is (octylphenol polyoxyethylene ether disubstituted) diphenyl ether diformate surfactant, which firstly makes 4,4'-diphenyl ether dicarboxylate carry out acyl chloride Reaction to obtain 4,4'-diformyl chloride diphenyl ether, and then make 4,4'-diformyl chloride diphenyl ether and octylphenol polyoxyethylene ether to undergo esterification reaction.

[0050] Wherein, the structural formula of the isothiazolinone derivative is The isothiazolinon...

Embodiment 3

[0054] This embodiment provides a microemulsion multifunctional nano oil displacing agent, wherein the microemulsion multifunctional nano oil displacing agent includes:

[0055] Nano-silica 20kg, diphenyl ether gemini surfactant 40kg, isothiazolinone derivatives 15kg, hyperbranched emulsified wetting and dispersing agent (model 31818 produced by Henan Daochun Chemical Technology Co., Ltd.) 3kg, Polyvinyl alcohol 2kg, dodecane 35kg, tetradecane 30kg and water 65kg.

[0056] Wherein, the diphenyl ether-based gemini surfactant is (octylphenol polyoxyethylene ether disubstituted) diphenyl ether diformate surfactant, which firstly makes 4,4'-diphenyl ether dicarboxylate carry out acyl chloride Reaction to obtain 4,4'-diformyl chloride diphenyl ether, and then make 4,4'-diformyl chloride diphenyl ether and octylphenol polyoxyethylene ether to undergo esterification reaction.

[0057] Wherein, the structural formula of the isothiazolinone derivative is The isothiazolinone derivati...

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PUM

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Abstract

The invention provides a micro-emulsion multifunctional nano oil displacement agent as well as a preparation method and application of the micro-emulsion multifunctional nano oil displacement agent. The microemulsion multifunctional nano oil displacement agent is prepared from 10 to 35 parts of nano silicon dioxide, 30 to 50 parts of diphenyl ether gemini surfactant, 10 to 20 parts of isothiazolinone derivative, 1 to 5 parts of permeation enhancer, 1 to 3 parts of stabilizer, 30 to 40 parts of dodecane, 20 to 35 parts of tetradecane and 50 to 80 parts of water. The microemulsion multifunctional nano oil-displacing agent provided by the invention has very high permeability-increasing and oil-displacing capabilities and excellent stability.

Description

technical field [0001] The invention relates to a microemulsion multifunctional nanometer oil displacement agent and its preparation method and application, belonging to the technical field of oil exploitation and oilfield chemical material preparation. Background technique [0002] With the deepening of petroleum development, for tight oil reservoirs, it is often necessary to increase production through fracturing and flooding to enhance oil recovery. Especially for ultra-low permeability reservoirs with low saturation pressure, abnormal high temperature, high pressure, and ultra-low permeability, the treatment technology is more difficult, and the level of oil recovery is often inseparable from the effect of oil displacement agents. [0003] The existing oil-displacing agents often fail to achieve the desired effect, and for some oil-displacing agents in the form of compound formulations, there are often problems such as poor long-term storage stability and unsatisfactory ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/58C09K8/584C09K8/588C09K8/60C08G65/332C07F7/18
CPCC09K8/58C09K8/584C09K8/588C09K8/604C08G65/3326C07F7/1804C07F7/1892C09K2208/10Y02A20/204
Inventor 蒋其辉杨向同王永红叶禹黄波刘建全张奎
Owner BC P INC CHINA NAT PETROLEUM CORP
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