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Preparation method of crude oil-water emulsion, and obtained oil-in-water emulsion

A water emulsification and crude oil technology, applied in the field of heavy oil thermal recovery, can solve the problems of poor fluidity and high crude oil viscosity

Inactive Publication Date: 2021-09-14
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of high viscosity and poor fluidity of crude oil, and provide a method for preparing crude oil-water emulsion and the obtained oil-in-water emulsion

Method used

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  • Preparation method of crude oil-water emulsion, and obtained oil-in-water emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1) Span 80 and crude oil with a mass ratio of 1:25 in the water bath heating device, the water bath temperature is 45°C, and the disperser is used for stirring and dispersing. The speed of the disperser is 3000r / min, and the stirring and dispersing time is 30min to obtain the mixed liquid A ;

[0040] Mix Tween 80 with a mass ratio of 1:50 and deionized water, and stir and disperse through a disperser. The stirring and dispersing rate is 700r / min, and the stirring and dispersing time is 20min to obtain the mixed liquid B;

[0041] The mass ratio of crude oil in mixed solution A to mixed solution B deionized water is 1:4;

[0042] 2) Mix the mixed solution A and the mixed solution B to obtain the mixed solution C, emulsify at 45°C and a stirring rate of 2000r / min for 60 minutes, and obtain a crude oil-water emulsion after the end.

[0043] After testing, the crude oil-water emulsion in Example 1 has the characteristics of homogeneity, low viscosity, high fluidity and hi...

Embodiment 2

[0045] 1) Add Span 20 and crude oil with a mass ratio of 1:30 in the water bath heating device, the temperature of the water bath is 50°C, stir and disperse with a disperser, the speed of the disperser is 5000r / min, and the stirring and dispersing time is 20min to obtain a mixed liquid A;

[0046] Mix Tween 40 with a mass ratio of 1:60 and deionized water, stir and disperse through a disperser, the stirring and dispersing rate is 900r / min, and the stirring and dispersing time is 15min to obtain the mixed liquid B;

[0047] The mass ratio of crude oil in mixed solution A to mixed solution B deionized water is 3:7;

[0048] 2) Mix the mixed solution A and the mixed solution B to obtain the mixed solution C, emulsify at 50°C and a stirring rate of 2500r / min, the emulsification time is 45min, and obtain a uniformly dispersed crude oil-water emulsion after the end .

[0049] After testing, the crude oil-water emulsion of Example 2 has the characteristics of homogeneity, low viscosi...

Embodiment 3

[0051] 1) Add OP-10 and crude oil with a mass ratio of 1:27 in the water bath heating device, the temperature of the water bath is 48°C, use a disperser to stir and disperse, the speed of the disperser is 4000r / min, and the stirring and dispersing time is 25min to obtain a mixed solution A;

[0052] Mix sucrose ester S1670 with a mass ratio of 1:55 and deionized water, stir and disperse through a disperser, the stirring and dispersing rate is 800r / min, and the stirring and dispersing time is 17min to obtain the mixed solution B;

[0053] The mass ratio of crude oil in mixed solution A to mixed solution B deionized water is 1:3;

[0054] 2) Mix the mixed solution A and the mixed solution B to obtain the mixed solution C, emulsify at 46°C and a stirring rate of 2400r / min, the emulsification time is 50min, and obtain a uniformly dispersed crude oil-water emulsion after the end .

[0055] After testing, the crude oil-water emulsion of Example 3 has the characteristics of homogen...

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Abstract

The invention discloses a preparation method of a crude oil-water emulsion, and belongs to the technical field of heavy oil thermal recovery. According to the invention, a lipophilic emulsifier and crude oil are mixed, after mixing, at the temperature of 45-50 DEG C, the association effect of colloid and asphalt in the crude oil is weakened, meanwhile, the lipophilic emulsifier can keep certain stability, and the lipophilic group of the lipophilic emulsifier is effectively combined with the crude oil; a hydrophilic emulsifier is added into deionized water, stirring is performed for dispersing, and hydrophilic groups of the hydrophilic emulsifier is compound with the deionized water; then a water mixed solution and a crude oil mixed solution are mixed and emulsified under the stirring condition at the temperature of 45-50 DEG C, so that groups of the lipophilic emulsifier and the hydrophilic emulsifier are effectively combined, a highly-stable hooking and combining effect is formed between interfacial films of the crude oil and the water, an interfacial viscosity effect is generated, and finally, preparing crude oil-water emulsion, namely oil-in-water emulsion, which is in a homogeneous state and is low in viscosity, high in fluidity and high in stability. The defects of high viscosity and poor fluidity of crude oil are overcome.

Description

technical field [0001] The invention belongs to the technical field of heavy oil thermal recovery, in particular to a method for preparing a crude oil-water emulsion and the obtained oil-in-water emulsion. Background technique [0002] In recent years, multi-component thermal fluid technology has been successfully applied in heavy oil production in oilfields, and has achieved obvious production increase effects. However, the current multi-element thermal fluid generation technology uses the combustion injection mechanism of aerospace rocket engines. This process has large heat dissipation losses, consumes a large amount of high-quality fuel (diesel) and relies heavily on complex water treatment systems, which urgently needs to be optimized and improved. [0003] Using oilfield waste water, crude oil and other materials as material and energy sources, the "marine heavy oil supercritical water gasification multi-component thermal fluid thermal recovery technology" with supercr...

Claims

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Application Information

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IPC IPC(8): C10L1/32
CPCC10L1/328
Inventor 郭烈锦彭智勇徐加陵容思琦赵秋阳金辉董宇张明弈张嘉玮
Owner XI AN JIAOTONG UNIV
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