Method for preparing multiple emulsions from layered active particles

A technology of active particles and emulsions, applied in the directions of mixing methods, chemical instruments and methods, drilling compositions, etc., can solve the problems of large amount of chemical agent, short stabilization time, high price, etc., achieve no toxic side effects, reduce The effect of consumption and cost reduction

Active Publication Date: 2012-10-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional method of preparing multiple emulsions is generally prepared by using two kinds of surfactants. Although this preparation method has prepared multiple emulsions used in oilfield profile control and made contributions to the profile control process of oilfield production, but At the same time, it has the following disad

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (A) Prepare a surfactant oil solution with a mass concentration of 1.0%;

[0024] (B) Gradually add water to the surfactant oil solution at a stirring speed of 800 rpm,

[0025] A water-in-oil emulsion is obtained;

[0026] (C) Prepare a layered active particle water dispersion system with a mass concentration of 0.5%;

[0027] (D) Gradually add layered active particles to the water-in-oil emulsion under high-speed stirring at 3000 rpm

[0028] In the water dispersion system, multiple emulsions of water-in-oil-in-water are obtained.

[0029] The surfactant oil solution is prepared by placing 1.0 part of surfactant in 100 parts of non-polar paraffin oil and stirring at a speed of 3000 rpm for 20-40 seconds. The surfactant in the surfactant oil solution is lipophilic Span20. The volume ratio of water to surfactant oil solution in water-in-oil emulsion is 3:7. The preparation of the aqueous dispersion system of layered active particles is obtained by placing 0.5 parts...

Embodiment 2

[0031] (A) Prepare a surfactant oil solution with a mass concentration of 3.0%;

[0032] (B) Gradually add water to the surfactant oil solution at a stirring speed of 1000 rpm,

[0033] A water-in-oil emulsion is obtained;

[0034] (C) Prepare a layered active particle water dispersion system with a mass concentration of 0.75%;

[0035] (D) Gradually add layered active particles to the water-in-oil emulsion under high-speed stirring at 4000 rpm

[0036] In the water dispersion system, multiple emulsions of water-in-oil-in-water are obtained.

[0037] The surfactant oil solution was prepared by placing 3.0 parts of surfactant in 100 parts of non-polar paraffin oil and stirring at a speed of 4000 rpm for 30 seconds. The surfactant in the surfactant oil solution is lipophilic Span40. The volume ratio of water to surfactant oil solution in water-in-oil emulsion is 5:5. The preparation of the aqueous dispersion system of layered active particles is obtained by placing 1.0 part...

Embodiment 3

[0040] (A) Prepare a surfactant oil solution with a mass concentration of 4.0%;

[0041] (B) Gradually add water to the surfactant oil solution at a stirring speed of 1200 rpm,

[0042] A water-in-oil emulsion is obtained;

[0043] (C) Prepare a layered active particle water dispersion system with a mass concentration of 1.5%;

[0044] (D) Gradually add layered active particles to the water-in-oil emulsion under high-speed stirring at 5000 rpm

[0045] In the water dispersion system, multiple emulsions of water-in-oil-in-water are obtained.

[0046] The surfactant oil solution was prepared by placing 4.0 parts of surfactant in 100 parts of non-polar paraffin oil and stirring at a speed of 5000 rpm for 40 seconds. The surfactant in the surfactant oil solution is lipophilic Span80. The volume ratio of water to surfactant oil solution in water-in-oil emulsion is 7:3. The preparation of the layered active particle water dispersion system is to place 1.5 parts of the layered a...

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Abstract

A method for preparing multiple emulsions from layered active particles comprises steps of: preparing a surfactant oily solution, a water-in-oil emulsion and a layered active particle water dispersion system and further preparing a water-in-oil-in-water multiple emulsion. The preparation technology comprises the following steps of: (A) preparing the surfactant oily solution with the mass concentration of 1.0-4.0%; (B) gradually adding clear water into the surfactant oily solution at the stirring rate of 800-1200 r/s to obtain the water-in-oil emulsion; (C) preparing the layered active particle water dispersion system with the mass concentration of 0.5-1.5%; and (D) gradually adding the water-in-oil emulsion into the layered active particle water dispersion system at the high stirring rate of 3000-5000 r/s to obtain the oil-in-water water-covering multiple emulsions. The method provided by the invention has characteristics of long stabilization time, small amount of the surfactant, low cost, safety, environmental protection, no toxic and side effect and the like, and is widely applied in petroleum exploitation technologies.

Description

technical field [0001] The invention relates to a method for preparing multiple emulsions used in profile control of oil exploitation formations, in particular to a method for preparing multiple emulsions with layered active particles. Background technique [0002] The traditional method of preparing multiple emulsions is generally prepared by using two kinds of surfactants. Although this preparation method has prepared multiple emulsions used in oilfield profile control and made contributions to the profile control process of oilfield production, but At the same time, it has the following disadvantages or deficiencies: ① The stability time is short, and the surfactant quickly forms mixed micelles, thereby demulsifying into a simple oil-in-water or water-in-oil emulsion; ② The amount of chemical agent is large, resulting in expensive ; ③ the application of a large number of chemical agents makes it have certain toxic and side effects. Contents of the invention [0003] Th...

Claims

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Application Information

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IPC IPC(8): B01F3/08C09K8/00
Inventor 魏芳吴琼陈刚李鹏张冰样高雪峰周承诗
Owner CHINA PETROLEUM & CHEM CORP
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