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Mini-emulsion used for thickened oil recovery and preparation method thereof

An emulsion, small technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of solvent volatile flash point, affecting application effect, safety hazards and other problems, achieving good reproducibility and no flash point, the effect of good viscosity reduction performance

Active Publication Date: 2018-04-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, solvents generally have problems such as volatility and low flash point, which affect the application effect and bring serious safety hazards

Method used

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  • Mini-emulsion used for thickened oil recovery and preparation method thereof
  • Mini-emulsion used for thickened oil recovery and preparation method thereof
  • Mini-emulsion used for thickened oil recovery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1 A kind of fine emulsion that is used for heavy oil recovery

[0030] Including the following components and parts by weight: 60 parts of organic solvents, 8 parts of nonionic surfactants, 8 parts of anionic oligomeric surfactants and 124 parts of deionized water;

[0031] Organic solvent is toluene; Nonionic surfactant is polyoxyethylene fatty alcohol ether (Brij30); Anionic oligomeric surfactant is structural formula as shown in formula (II):

[0032]

[0033] The preparation method is:

[0034] (1) Add the nonionic surfactant and the anionic oligomeric surfactant into the organic solvent, and after stirring for 10 minutes, the system is uniformly dispersed to obtain a solvent precursor;

[0035] (2) Add deionized water dropwise to the solvent precursor prepared in step (1), and the dropping time is 50 minutes;

[0036] (3) After adding the deionized water dropwise, continue to stir for 25 minutes to obtain.

Embodiment 2

[0040] Example 2 A kind of fine emulsion used for heavy oil recovery

[0041] Including the following components and their parts by weight: 40 parts of organic solvents, 6 parts of nonionic surfactants, 4 parts of anionic oligomeric surfactants and 150 parts of deionized water;

[0042] Organic solvent is gasoline; Nonionic surfactant is polyoxyethylene polyol fatty acid ester (Tween80); Anionic oligomeric surfactant is structural formula as shown in formula (Ⅲ):

[0043]

[0044] The preparation method is:

[0045] (1) Add the nonionic surfactant and the anionic oligomeric surfactant into the organic solvent, and after stirring for 20 minutes, the system is uniformly dispersed to obtain a solvent precursor;

[0046] (2) Add deionized water dropwise to the solvent precursor prepared in step (1), and the dropping time is 40 minutes;

[0047] (3) After adding the deionized water dropwise, continue to stir for 60 minutes to obtain.

Embodiment 3

[0051] Embodiment 3 A kind of fine emulsion that is used for heavy oil recovery

[0052] Including the following components and parts by weight: 60 parts of organic solvent, 20 parts of anionic oligomeric surfactant and 120 parts of deionized water;

[0053] Organic solvent is n-octane; Anionic oligomeric surfactant is identical with embodiment 2;

[0054] The preparation method is:

[0055] (1) Add the anionic oligomeric surfactant into the organic solvent, and after stirring for 25 minutes, the system is uniformly dispersed to obtain a solvent precursor;

[0056] (2) Add deionized water dropwise to the solvent precursor prepared in step (1), and the dropping time is 40 minutes;

[0057] (3) After adding the deionized water dropwise, continue to stir for 40 minutes to obtain.

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Abstract

The invention belongs to the technical field of petrochemical engineering, and specifically relates to mini-emulsion used for thickened oil recovery and a preparation method thereof. The mini-emulsioncomprises the following ingredients in parts by weight: 40-60 parts of an organic solvent, 0-8 parts of a nonionic surfactant, 4-20 parts of an anion oligomeric surfactant and 120-150 parts of deionized water, wherein the anion oligomeric surfactant is an oligomer of a paralkyl phenol derivative. The mini-emulsion is prepared by the following steps: dispersing the nonionic surfactant and the anion oligomeric surfactant into the organic solvent and slowly dropping the deionized water into the mixed solution, so as to form the mini-emulsion. The obtained mini-emulsion does not have flash pointsand is good in viscosity reduction capacity.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to a fine emulsion used for heavy oil exploitation and a preparation method thereof. Background technique [0002] With the continuous increase of oil demand and the continuous consumption of ordinary crude oil, people pay more and more attention to heavy oil resources. Heavy oil resources are abundant in the world, and heavy oil resources are expected to become an important energy source in the 21st century. However, the development of heavy oil faces many technical difficulties, one of which is the high viscosity and poor fluidity of heavy oil due to high asphaltene and colloid content, resulting in difficult mining and low recovery. [0003] At present, in addition to using steam huff and puff and steam flooding to improve the recovery of heavy oil, the recovery of heavy oil can also be effectively improved by means of emulsification, viscosity reducti...

Claims

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Application Information

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IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 张宗檩吴伟石静李财富曹绪龙郭兰磊王红艳侯研博于群祝仰文秦冰潘斌林元福卿孙业恒闵令元王丽娟郭淑凤曾胜文窦立霞夏晞冉单联涛
Owner CHINA PETROLEUM & CHEM CORP
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