CN105985761A - Emulsifying agent for crude oil and application thereof - Google Patents
Emulsifying agent for crude oil and application thereof Download PDFInfo
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- CN105985761A CN105985761A CN201510075968.5A CN201510075968A CN105985761A CN 105985761 A CN105985761 A CN 105985761A CN 201510075968 A CN201510075968 A CN 201510075968A CN 105985761 A CN105985761 A CN 105985761A
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- crude oil
- emulsifying agent
- oil emulsifying
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Abstract
The invention discloses an emulsifying agent for crude oil. According to the invention, on the basis of the principles of the effect of acid-base ion pairs, fatty acid ethanol amide and organic acid are mixed and compounded so as to prepare the crude oil emulsifying agent with excellent performance. The crude oil emulsifying agent is simple to prepare, has good emulsification performance, heat stability, salt resistance and resistance to calcium and magnesium, can be applied to an oil field environment with high temperature and a high degree of mineralization, and improves the recovery efficiency of crude oil. Moreover, the invention also discloses application of the emulsifying agent for crude oil.
Description
Technical field
The present invention relates to field of oilfield chemistry.More particularly, to a kind of crude oil emulsifying agent and application.
Background technology
After oil have passed through primary oil recovery and secondary oil recovery, still there is the remaining oil of 60%～70% with oil droplet or oil
The form of film is stranded in underground, and suitable tertiary oil recovery method is found in an urgent demand, improves to greatest extent
Recovery ratio.Chemical flooding is the main method improving recovery ratio in tertiary oil recovery, the surfactant in chemical flooding
Drive raising recovery ratio amplitude big, widely applicable, be the technology of reservoir sweep that a kind of development potentiality is big.Existing surface
The activating agent displacement of reservoir oil is mainly by overcoming capillary force, reduces interfacial tension and realizes improving microscopic oil displacement efficiency,
In addition oil-water emulsion also affecting and important oil displacement efficiency.Emulsifying agent makes emulsification of crude oil become little oil
Dripping, particle diameter is less than hollow billet diameter, will not be subject the effect of capillary force when oil droplet is by rock duct, it is not necessary to
Overcome capillary force, it is possible to be effectively improved tar productivity.
Fatty acid ethanol amide is a class nonionic surfactant, has good thickening and foam stability energy,
Crude oil is had certain emulsification, can be used for tertiary oil recovery.Fatty acid ethanol amide add a certain amount of
Organic acid substance, as octanoic acid, capric acid, lauric acid, myristic acid, Palmic acid, stearic acid, oleic acid,
Linoleic acid, your acid, linolenic acid, arachidic acid, erucic acid appropriate etc., by acid ion alkali ion between electrical attraction work
With, fatty acid ethanol amide molecule and organic acid molecule close-packed arrays on oil-water interfaces, enhance emulsifying power
Power and emulsion stability；Simultaneously because the feature of molecular structure (positive and negative charge neutralization), there is good anticalcium
Magnesium ion ability, has possessed the probability used in the oilfield environment of high salinity.
Summary of the invention
It is an object of the present invention to provide a kind of crude oil emulsifying agent, this emulsifying agent preparation technology is simple,
There is high surface and interface activity, emulsifying capacity and emulsion stability, resistance to hard water and salt tolerance.
Further object is that the application that described crude oil emulsifying agent is provided.
For reaching above-mentioned purpose, the present invention uses following technical proposals:
A kind of crude oil emulsifying agent, described crude oil emulsifying agent comprises fatty acid ethanol amide and organic acid.
Preferably, the mass ratio of described fatty acid ethanol amide and organic acid is 1:1-100:1.
Preferably, described fatty acid ethanol amide is including at least a kind of material with following structural formula:
A () has the fatty monoethanol amide of structural formula (i)；
B () has structural formula (ii) fatty diglycollic amide；
In formula (i) and (ii), R is the saturated of C8-C18 or unsaturated alkyl.
Preferably, one or more in the saturated or unsaturated fatty acid of C8-C24 of described organic acid,
As octanoic acid, capric acid, lauric acid, myristic acid, Palmic acid, stearic acid, oleic acid, linoleic acid, appropriate you acid,
Linolenic acid, arachidic acid, erucic acid and other acid etc..
Crude oil emulsifying agent application in oilfield chemistry:
The mineralized water solution of preparation crude oil emulsifying agent, described crude oil emulsifying agent contains or not contain auxiliary agent；Described
The concentration of crude oil emulsifying agent mineralized water solution is 0.01wt%-10wt%；Preferred concentration is 0.1wt%-5wt%.
Preferably, described auxiliary agent is selected from inorganic salt, surfactant, acrylamide copolymer, polysaccharide
One or more in polymer and hydrophobic associated copolymer.
Beneficial effects of the present invention is as follows:
(1) crude oil emulsifying agent of the present invention is mixed to get by fatty acid ethanol amide and organic acid are compounding, preparation
Technique is simple；
(2) crude oil emulsifying agent of the present invention has high surface and interface activity, emulsifying capacity and emulsion stability；
(3) crude oil emulsifying agent of the present invention has resistance to hard water and salt tolerance；
(4) raw material of the crude oil emulsifying agent of the present invention is not completely dependent on oil product；
(5) crude oil emulsifying agent of the present invention is along with the rising of temperature, and its emulsifiability does not has the biggest change, tool
There is good heat stability.
Detailed description of the invention
In order to be illustrated more clearly that the present invention, below in conjunction with preferred embodiment, the present invention is done further
Bright.It will be appreciated by those skilled in the art that following specifically described content is illustrative rather than limiting
Property, should not limit the scope of the invention with this.
Embodiment 1
Preparation mass concentration be 0.5% the mineralized water solution of crude oil emulsifying agent (crude oil emulsifying agent is Oleum Cocois
Diglycollic amide and oleic acid 10:1 in mass ratio mixing is compounding and obtains, and in mineralized water, NaCl concentration is
25000mg/L, calcium, magnesium ion concentration are 600mg/L)；Take this crude oil emulsifying agent mineralized water solution 7mL
With 3g Shengli Oil Field, Shandong crude oil in 15mL teat glass, good seal, it is placed in constant temperature in 80 DEG C of water-baths
1h, takes out, overturns 20 times, profit emulsifying completely mutually, continues to be put in 80 DEG C of water-baths, observes, 24h
Interior without aqueous phase precipitation.
Embodiment 2
Preparation mass concentration be 1% the mineralized water solution of crude oil emulsifying agent (crude oil emulsifying agent is stearic acid two
Glycollic amide and oleic acid 15:1 in mass ratio mixing is compounding and obtains, and in mineralized water, NaCl concentration is
25000mg/L, calcium, magnesium ion concentration are 600mg/L)；Take this crude oil emulsifying agent mineralized water solution 7mL
With 3g Shengli Oil Field, Shandong crude oil in 15mL teat glass, good seal, it is put in 110 DEG C of calorstats perseverance
Temperature 1h, takes out, overturns 20 times, profit emulsifying completely mutually, continues to be put in calorstat constant temperature, observes, 12h
Interior without aqueous phase precipitation.
Embodiment 3
Preparation mass concentration be 0.2% the mineralized water solution of crude oil emulsifying agent (crude oil emulsifying agent is tall oil
Acid single ethanol amide, cocinic acid and surfactant myristyl polyoxyethylenated alcohol carboxylic acid sodium are in mass ratio
20:1:1 mixing is compounding and obtains, and in mineralized water, NaCl concentration is 30000mg/L, and calcium, magnesium ion concentration are
500mg/L)；Take this crude oil emulsifying agent mineralized water solution 7mL and 3g Shengli Oil Field, Shandong crude oil in 15mL
In teat glass, good seal, it is put in constant temperature 1h in 80 DEG C of water-baths, takes out, overturn 20 times, profit is mutually complete
Full milk, continues to be put in 80 DEG C of water-baths, observes, and separates out without aqueous phase in 24h
Embodiment 4
Preparation mass concentration be 0.2% the mineralized water solution of crude oil emulsifying agent (crude oil emulsifying agent is 24
Acid single ethanol amide, cocinic acid and partially hydrolyzed polyacrylamide (PHPA) HPAM 20:1:4 in mass ratio mixing
Compounding and obtain, in mineralized water, NaCl concentration is 19000mg/L, and calcium, magnesium ion concentration are 500mg/L)；
Take this crude oil emulsifying agent mineralized water solution 7mL and 3g Shengli Oil Field, Shandong crude oil in 15mL teat glass,
Good seal, is put in constant temperature 1h in 80 DEG C of water-baths, takes out, overturns 20 times, profit emulsifying completely mutually, continues
It is put in 80 DEG C of water-baths, observes, separate out without aqueous phase in 24h.
Embodiment 5
Preparation mass concentration be 0.3% the mineralized water solution of crude oil emulsifying agent (crude oil emulsifying agent is Oleum Cocois
Diglycollic amide and oleic acid 25:1 in mass ratio mixing is compounding and obtains, and in mineralized water, NaCl concentration is
5000mg/L, calcium, magnesium ion concentration are 100mg/L)；Take this crude oil emulsifying agent mineralized water solution 7mL and
3g Daqing oil field crude oil in 15mL teat glass, good seal, be put in constant temperature 1h in 55 DEG C of water-baths, take
Go out, overturn 20 times, profit emulsifying completely mutually, continue to be put in 55 DEG C of water-baths, observe, anhydrous in 24h
Separate out mutually.
Embodiment 6
Preparation mass concentration be 1% the mineralized water solution of crude oil emulsifying agent (crude oil emulsifying agent is oleic acid monoethanol
Amide and cocinic acid 25:1 in mass ratio mixing is compounding and obtains, and in mineralized water, NaCl concentration is 5000mg/L,
Calcium, magnesium ion concentration are 100mg/L)；Take this crude oil emulsifying agent mineralized water solution 7mL and 3g Daqing oil
Field crude oil in 15mL teat glass, good seal, be put in constant temperature 1h in 95 DEG C of water-baths, take out, upset
20 times, profit emulsifying completely mutually, continues to be put in 95 DEG C of water-baths, observes, separate out without aqueous phase in 24h
Embodiment 7
Preparation mass concentration be 0.2% the mineralized water solution of crude oil emulsifying agent (crude oil emulsifying agent is Oleum Cocois
Diglycollic amide, oleic acid, linoleic acid 20:1:1 in mass ratio mixing is compounding and obtains, and in mineralized water, NaCl is dense
Degree is 5000mg/L, and calcium, magnesium ion concentration are 100mg/L)；Take this crude oil emulsifying agent mineralized water solution
7mL and 3g Daqing oil field crude oil in 15mL teat glass, good seal, be put in constant temperature in 55 DEG C of water-baths
1h, takes out, overturns 20 times, profit emulsifying completely mutually, continues to be put in 55 DEG C of water-baths, observes, 24h
Interior without aqueous phase precipitation.
Embodiment 8
Preparation mass concentration be 0.3% the mineralized water solution of crude oil emulsifying agent (crude oil emulsifying agent is Oleum Cocois
Diglycollic amide, oleic monoethanolamide and oleic acid 10:10:1 in mass ratio mixing is compounding and obtains, mineralized water
Middle NaCl concentration is 5000mg/L, and calcium, magnesium ion concentration are 100mg/L)；Take this crude oil emulsifying agent ore deposit
Change aqueous solution 7mL and 3g Daqing oil field crude oil in 15mL teat glass, good seal, it is put in 55 DEG C of water
Constant temperature 1h in bath, takes out, overturns 20 times, profit emulsifying completely mutually, continues to be put in 55 DEG C of water-baths, sees
Examine, separate out without aqueous phase in 24h.
Obviously, the above embodiment of the present invention is only for clearly demonstrating example of the present invention, and
It is not the restriction to embodiments of the present invention, for those of ordinary skill in the field,
Can also make other changes in different forms on the basis of described above, here cannot be to all
Embodiment give exhaustive, every belong to the obvious change that technical scheme extended out
Change or change the row still in protection scope of the present invention.
Claims (7)
1. a crude oil emulsifying agent, it is characterised in that: described crude oil emulsifying agent comprises fatty acid ethanol amide
And organic acid.
Crude oil emulsifying agent the most according to claim 1, it is characterised in that: described fatty acid ethanolamide acyl
The mass ratio of amine and organic acid is 1:1-100:1.
Crude oil emulsifying agent the most according to claim 1 and 2, it is characterised in that described fatty acid second
Alkylolamides is including at least a kind of material with following structural formula:
A () has the fatty monoethanol amide of structural formula (i)；
B () has structural formula (ii) fatty diglycollic amide；
In formula (i) and (ii), R is the saturated of C8-C18 or unsaturated alkyl.
4. according to the crude oil emulsifying agent described in claims 1 to 3 any one, it is characterised in that: described
One or more in the saturated and unsaturated fatty acid of C8-C24 of organic acid.
5. the application in oilfield chemistry of the crude oil emulsifying agent described in Claims 1-4.
Application the most according to claim 5, it is characterised in that: the mineralized water of preparation crude oil emulsifying agent
Solution, described crude oil emulsifying agent contains or not contain auxiliary agent；The concentration of described crude oil emulsifying agent mineralized water solution
For 0.01wt%-10wt%.
Application the most according to claim 6, it is characterised in that: described auxiliary agent is selected from inorganic salt, table
One or several in face activating agent, acrylamide copolymer, polysaccharide polymer and hydrophobic associated copolymer
Kind.
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| CN201510075968.5A CN105985761B (en) | 2015-02-12 | 2015-02-12 | A kind of crude oil emulsifying agent and application |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108611081A (en) * | 2018-06-08 | 2018-10-02 | 烟台智本知识产权运营管理有限公司 | A kind of emulsifier and preparation method thereof of high temperature and high salt viscous crude |
| CN111088025A (en) * | 2018-10-23 | 2020-05-01 | 中国石油化工股份有限公司 | Efficient oil washing agent for improving carbon dioxide oil displacement efficiency and preparation method and application thereof |
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| US4374737A (en) * | 1980-01-14 | 1983-02-22 | Dana E. Larson | Nonpolluting drilling fluid composition |
| CN1231280A (en) * | 1998-04-03 | 1999-10-13 | 大庆石油学院 | Nonionic surface active agent for tertiary oil recovery and productive method thereof |
| CN1346012A (en) * | 2000-09-30 | 2002-04-24 | 大庆石油学院 | Visco-elastic low tension chemical oil displacement method for raising crude oil productivity |
| CN101475796A (en) * | 2009-01-15 | 2009-07-08 | 山东大学 | Lyotropic liquid crystal flooding system, as well as preparation method and use thereof |
| CN103571450A (en) * | 2012-07-19 | 2014-02-12 | 中国石油天然气集团公司 | Low friction emulsifying acid liquid for fracturing acidification, and application thereof |
| CN103725268A (en) * | 2013-12-26 | 2014-04-16 | 安东石油技术（集团）有限公司 | High-temperature-resistant oil base drilling fluid emulsifier |
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2015
- 2015-02-12 CN CN201510075968.5A patent/CN105985761B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4374737A (en) * | 1980-01-14 | 1983-02-22 | Dana E. Larson | Nonpolluting drilling fluid composition |
| CN1231280A (en) * | 1998-04-03 | 1999-10-13 | 大庆石油学院 | Nonionic surface active agent for tertiary oil recovery and productive method thereof |
| CN1346012A (en) * | 2000-09-30 | 2002-04-24 | 大庆石油学院 | Visco-elastic low tension chemical oil displacement method for raising crude oil productivity |
| CN101475796A (en) * | 2009-01-15 | 2009-07-08 | 山东大学 | Lyotropic liquid crystal flooding system, as well as preparation method and use thereof |
| CN103571450A (en) * | 2012-07-19 | 2014-02-12 | 中国石油天然气集团公司 | Low friction emulsifying acid liquid for fracturing acidification, and application thereof |
| CN103725268A (en) * | 2013-12-26 | 2014-04-16 | 安东石油技术（集团）有限公司 | High-temperature-resistant oil base drilling fluid emulsifier |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108611081A (en) * | 2018-06-08 | 2018-10-02 | 烟台智本知识产权运营管理有限公司 | A kind of emulsifier and preparation method thereof of high temperature and high salt viscous crude |
| CN111088025A (en) * | 2018-10-23 | 2020-05-01 | 中国石油化工股份有限公司 | Efficient oil washing agent for improving carbon dioxide oil displacement efficiency and preparation method and application thereof |
| CN111088025B (en) * | 2018-10-23 | 2022-05-24 | 中国石油化工股份有限公司 | Efficient oil washing agent for improving carbon dioxide oil displacement efficiency and preparation method and application thereof |
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