CN109943312A - A kind of oil displacement agent and preparation method thereof - Google Patents
A kind of oil displacement agent and preparation method thereof Download PDFInfo
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- CN109943312A CN109943312A CN201910210070.2A CN201910210070A CN109943312A CN 109943312 A CN109943312 A CN 109943312A CN 201910210070 A CN201910210070 A CN 201910210070A CN 109943312 A CN109943312 A CN 109943312A
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Abstract
A kind of oil displacement agent and preparation method thereof.The oil displacement agent includes the isopropanol of the alcohol ether carboxylate of 3-30% weight percentage, the fatty alcohol polyoxyethylene ether of 10-40% weight percentage, the quaternary ammonium salt of 20-65% weight percentage, the sodium sulfate of polyethenoxy ether of fatty alcohol of 0-21% weight percentage, the ester sodium salt of 0-36% weight percentage, the sophorolipid of 5-25% weight percentage, 0-15% weight percentage.The described method includes: under agitation, optionally the isopropanol is added to the container, the alcohol ether carboxylate, the fatty alcohol polyoxyethylene ether, the quaternary ammonium salt, the sophorolipid, the aliphatic alcohol polyoxyethylene sulfonate and the optionally described sodium sulfate of polyethenoxy ether of fatty alcohol, the ester sodium salt are added in the container, stirring obtains the oil displacement agent to colorless and transparent.The oil displacement agent of the application can be improved the tar productivity of oil reservoir, and resistant to high temperatures, high salt tolerance, anti-viscous crude.
Description
Technical field
This application involves chemical flooding technologies more particularly to a kind of oil displacement agent and preparation method thereof.
Background technique
The recovery process of petroleum is divided into three phases: the exploitation that the effect by strata pressure extrudes crude oil from earth's surface
Journey is known as primary oil recovery；It is known as secondary oil recovery using the recovery process that gas injection or water filling improve strata pressure；After secondary oil recovery still
There is a large amount of crude oil to remain in underground, needs with physics, chemistry and other technologies extraction, referred to as tertiary oil recovery.It carries out three times
Oil recovery is the effective measures for slowing down oil field aging rate, maintaining stable production of crude oil.For a long time, chemical flooding technology is considered most suitable
It shares in the method for improving waterflooding development later period oil recovery rate.Chemical flooding is by the way that polymer, surface is added in injection water
The chemical oil displacement agents such as activating agent, alkali change the property between displacement fluid and reservoir fluid, reach the side for improving recovery ratio purpose
Method.However, current chemical flooding technology is there is also reagent cost height, washing oil effect is poor, the not high feature of input-output ratio.
Summary of the invention
In order to solve the above-mentioned technical problem, this application provides a kind of oil displacement agent, which can not only improve oil reservoir
Tar productivity, and it is cheap, and performance is stablized, and biological degradation rate is high, simple production process.
Specifically, this application provides a kind of oil displacement agent, the oil displacement agent includes each component of following weight percentage:
In embodiments herein, the oil displacement agent may include each component of following weight percentage:
In embodiments herein, the alcohol ether carboxylate can be selected from alcohol phenol ether carboxylate, Fatty Alcohol Ether Carboxylate
With any one or more in isomery alcohol ether carboxylate.
In embodiments herein, the alcohol phenol ether carboxylate may include: octyl phenol polyoxyethylene ether (3) carboxylic acid
Salt, octyl phenol polyoxyethylene ether (5) carboxylate, octyl phenol polyoxyethylene ether (7) carboxylate, octyl phenol polyoxyethylene ether (9) carboxylic
Hydrochlorate, octyl phenol polyoxyethylene ether (10) carboxylate, nonylphenol polyoxyethylene ether (3) carboxylate, nonylphenol polyoxyethylene ether (5)
Carboxylate, nonylphenol polyoxyethylene ether (7) carboxylate, nonylphenol polyoxyethylene ether (9) carboxylate and nonylphenol polyoxyethylene ether
(10) carboxylate.
In embodiments herein, the Fatty Alcohol Ether Carboxylate may include: 12/14 aliphatic alcohol polyethenoxies
Ether (7) carboxylate, 12/14 fatty alcohol polyoxyethylene ether (9) carboxylates, 16/18 fatty alcohol polyoxyethylene ether (7) carboxylics
Hydrochlorate, 16/18 fatty alcohol polyoxyethylene ether (9) carboxylates, 18/16 fatty alcohol polyoxyethylene ether (7) carboxylates and
18/16 fatty alcohol polyoxyethylene ether (9) carboxylates.
In embodiments herein, the isomery alcohol ether carboxylate may include: heterogeneous ten alcohol polyoxyethylene ether (5) carboxylic
Hydrochlorate, heterogeneous ten alcohol polyoxyethylene ether (7) carboxylate, heterogeneous ten alcohol polyoxyethylene ether (9) carboxylate, isomerous tridecanol polyoxy second
Alkene ether (5) carboxylate, isomerous tridecanol polyoxyethylene ether (7) carboxylate and isomerous tridecanol polyoxyethylene ether (9) carboxylate.
It will be understood by those skilled in the art that the digital representation polyoxy second in bracket in alcohol ether carboxylate chemical name
The mean number of alkene ether, the "/" in alcohol ether carboxylate chemical name indicates mixing carbon, for example, 12/14 fatty alcohol polyoxy second
Alkene ether (7) carboxylate indicates the rouge made of the fatty alcohol of 12 carbon, the fatty alcohol of 14 carbon and 7 polyoxyethylene ether
Fat alcohol ether carboxylate.
In embodiments herein, the fatty alcohol polyoxyethylene ether can be the fatty alcohol polyoxy that the degree of polymerization is 2-9
Vinethene, for example, 12/14 fatty alcohol polyoxyethylene ether (5), 12/14 fatty alcohol polyoxyethylene ether (7), 12/ten
Four fatty alcohol polyoxyethylene ether (9) etc..It will be understood by those skilled in the art that in fatty alcohol polyoxyethylene ether chemical name
The degree of polymerization of digital representation polyoxyethylene ether in bracket, the "/" in fatty alcohol polyoxyethylene ether chemical name indicate mixing carbon,
For example, 12/14 fatty alcohol polyoxyethylene ether (9) are poly- by the fatty alcohol of 12 carbon, the fatty alcohol of 14 carbon and 9
Fatty alcohol polyoxyethylene ether made of ethylene oxide ether.
In embodiments herein, the quaternary ammonium salt can be double type quaternary ammonium salt.
In embodiments herein, the quaternary ammonium salt can be selected from bis- [(dodecyl hydroxyethyl methyl) chlorine of trimethylene base
Change ammonium], trimethylene base bis- [(12/dodecyldimethylamine base) ammonium chlorides], trimethylene base bis- [(hexadecyldimethyl benzyl ammonium) ammonium chlorides],
Ethylene group bis- [(16/octadecyldimethyl) ammonium chlorides], ethylene group bis- [(hexadecyldimethyl benzyl ammonium) ammonium chlorides], ethylene group
Any one in bis- [(octadecyldimethyl) ammonium chlorides], ethylene group bis- [(hexadecyl amide base dimethyl) ammonium chlorides]
Or it is a variety of.It will be understood by those skilled in the art that the "/" in quaternary ammonium salt chemical name indicates mixing carbon, for example, ethylene group is double
"/" in [(16/octadecyldimethyl) ammonium chloride] indicates that alkyl is the mixed alkyl of cetyl and octadecyl.
In embodiments herein, the sodium sulfate of polyethenoxy ether of fatty alcohol can be selected from 12/14 fatty alcohols
Polyoxyethylene ether (2) sodium sulphate, 12/14 fatty alcohol polyoxyethylene ether (3) sodium sulphate, 12/14 fatty alcohol polyoxy second
Alkene ether (5) sodium sulphate, 12/14 fatty alcohol polyoxyethylene ether (7) sodium sulphate and 12/14 fatty alcohol polyoxyethylene ether
(9) any one or more in sodium sulphate.It will be understood by those skilled in the art that sodium sulfate of polyethenoxy ether of fatty alcohol
Scientific name claim in bracket in digital representation polyoxyethylene ether mean number, sodium sulfate of polyethenoxy ether of fatty alcohol chemical name
In "/" indicate mixing carbon, for example, 12/14 fatty alcohol polyoxyethylene ether (2) sodium sulphate indicate by 12 carbon fat
Sodium sulfate of polyethenoxy ether of fatty alcohol made of alcohol, the fatty alcohol of 14 carbon and 2 polyoxyethylene ether.
In embodiments herein, the ester sodium salt can be selected from docusate sodium (aerosol OT), the moon
Any one or more in cinnamic alcohol polyoxyethylene ether sulfosuccinic acid esters disodium, Aerosol OT.
Present invention also provides the preparation methods of oil displacement agent as described above, which comprises under agitation, appoints
The isopropanol is added to the container by selection of land, by the alcohol ether carboxylate, the fatty alcohol polyoxyethylene ether, the quaternary ammonium salt,
It is the sophorolipid, the aliphatic alcohol polyoxyethylene sulfonate and the optionally described sodium sulfate of polyethenoxy ether of fatty alcohol, described
Ester sodium salt is added in the container, and stirring obtains the oil displacement agent to colorless and transparent.
In embodiments herein, can 25-50 DEG C at a temperature of each component stirred to colorless and transparent.
The oil displacement agent of the application with injection water enter after oil reservoir can rapid aggregation on oil-water interfaces, due to this Shen
The interfacial activity with super strength of oil displacement agent please forms one layer of dispersion, dispersion distribution with oil, water under formation conditions
Between oily phase and water phase, the property of oil, water two-phase is had both, oil, water and oil displacement agent inside dispersion are all nanoscale liquid
Drop.The dispersion itself can be dissolved each other with oil or water with any proportion, while be only distributed under the conditions of grease is common existing
On oil-water interfaces, therefore this property between grease can be such that the interfacial tension between dispersion and oil or water drops
To close to zero, to significantly reduce the difference of capillary force, reduces the heterogencity in displacement process, increase driven water-replacing
Spread area, improve displacement efficiency.
The oil displacement agent of the application is not only able to improve the tar productivity of oil reservoir, and (for example, 85-90 DEG C) resistant to high temperatures, anti-height
Salt, anti-viscous crude.
The oil displacement agent of the application is cheap, and performance is stablized, and component therein is easily biodegradable, and biological degradation rate is high
Up to 95%, simple production process.
Other features and advantage will illustrate in the following description, also, partly become from specification
It obtains it is clear that being understood and implementing the application.Other advantages of the application can be by specification, claims
And scheme described in attached drawing is achieved and obtained.
Detailed description of the invention
Attached drawing is used to provide the understanding to technical scheme, and constitutes part of specification, with the application's
Embodiment is used to explain the technical solution of the application together, does not constitute the limitation to technical scheme.
Fig. 1 is the experimental result picture that rock core displacement is carried out using the blank assay water sample without oil displacement agent.
Fig. 2 is the experimental result that rock core displacement is carried out using the experiment water sample of the oil displacement agent containing 1% the embodiment of the present application 1
Figure.
Fig. 3 is the experimental result picture that rock core displacement is carried out using the blank assay water sample without oil displacement agent.
Fig. 4 is the experimental result picture that rock core displacement is carried out using the experiment water sample containing 1% common oil displacement agent.
Fig. 5 is the experimental result that rock core displacement is carried out using the experiment water sample of the oil displacement agent containing 1% the embodiment of the present application 2
Figure.
Specific embodiment
It, hereinafter will be to embodiments herein for the purposes, technical schemes and advantages of the application are more clearly understood
It is described in detail.It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can
With mutual any combination.
Raw materials and reagents employed in following embodiment are unless otherwise instructed ordinary commercial products.
Following embodiment is for preparing 100kg oil displacement agent.
Embodiment 1
The stirring of stirred autoclave is opened, first 6kg isopropanol is added in stirred autoclave, then gathers 30kg nonyl phenol
Bis- [(the dodecyl hydroxyl second of ethylene oxide ether (9) carboxylate, the fatty alcohol polyoxyethylene ether of 15kg 12/14 (9), 20kg trimethylene base
Ylmethyl) ammonium chloride], the fatty alcohol polyoxyethylene ether of 11kg 12/14 (2) sodium sulphate, 10kg docusate sodium, 8kg sophorolipid
It is added in stirred autoclave, and maintains the temperature of stirred autoclave at 30 DEG C, raw material therein is stirred to colorless and transparent, is obtained
To oil displacement agent.
Embodiment 2
The stirring of stirred autoclave is opened, first 6kg isopropanol is added in stirred autoclave, then by 15kg 12/ten
Four fatty alcohol polyoxyethylene ether (9) carboxylate, the fatty alcohol polyoxyethylene ether of 10kg 12/14 (5), 50kg ethylene group bis- [(ten
Eight alkyl dimethyls) ammonium chloride], the fatty alcohol polyoxyethylene ether of 6kg 12/14 (3) sodium sulphate, 8kg docusate sodium, 5kg Chinese scholartree
Glycolipid is added in stirred autoclave, and maintains the temperature of stirred autoclave at 35 DEG C, and raw material therein is stirred to colorless and transparent
Shape obtains oil displacement agent.
Embodiment 3
The stirring of stirred autoclave is opened, first 8kg isopropanol is added in stirred autoclave, then by 19kg isomery 13
Alcohol polyoxyethylene ether (9) carboxylate, the fatty alcohol polyoxyethylene ether of 11kg 12/14 (7), the bis- [(cetyls of 32kg ethylene group
Acylamidodimethylbetaine) ammonium chloride], the fatty alcohol polyoxyethylene ether of 5kg 12/14 (2) sodium sulphate, 12kg lauryl alcohol polyethylene glycol oxide
Ether sulfosuccinates disodium, 13kg sophorolipid are added in stirred autoclave, and maintain the temperature of stirred autoclave at 40 DEG C, will
Raw material therein is stirred to colorless and transparent, obtains oil displacement agent.
Embodiment 4
The stirring of stirred autoclave is opened, first 5kg isopropanol is added in stirred autoclave, then by ten alcohol of 10kg isomery
Polyoxyethylene ether (9) carboxylate, the fatty alcohol polyoxyethylene ether of 20kg 12/14 (9), the bis- [(cetyls two of 15kg ethylene group
Methyl) ammonium chloride, 20kg ethylene group bis- [(hexadecyl amide base dimethyl) ammonium chlorides], the fatty alcohol of 12.5kg 12/14
Polyoxyethylene ether (3) sodium sulphate, 7.5kg Aerosol OT, 10kg sophorolipid are added in reaction kettle, and maintain to stir
The temperature of reaction kettle is mixed at 50 DEG C, raw material therein is stirred to colorless and transparent, oil displacement agent is obtained.
Performance test
1, according to People's Republic of China (PRC) oil and gas industry standard SY/T 5270-1999, " surface and interfacial tension are surveyed
Determine method " blank group for being free of oil displacement agent, common oil displacement agent are tested (by petroleum sulfonate and fatty alcohol polyoxyethylene ether sulfate
Composition) group and the embodiment of the present application oil displacement agent group interfacial tension between oil and water, the test equipment used for Sigma 702ET,
The additive amount of oil displacement agent is 1%.Test result is as follows shown in table.
It can by the common oil displacement agent that petroleum sulfonate and fatty alcohol polyoxyethylene ether sulfate are formed although can be seen that
The tension between oil-water interfaces is reduced, but the tension between oil-water interfaces can not be down to close to zero, the embodiment of the present application
Tension between oil-water interfaces can be then down to close to zero by oil displacement agent.
2, core flooding is tested
Experimental group 1
According to People's Republic of China (PRC) oil and gas industry standard SY/T 6540-2002 " damage of drilling fluid and completion fluid oil
Layer indoor evaluation method " and sky of SY/T 5358-2010 " the reservoir sensitivity flowing experiment evaluation method " investigation without oil displacement agent
Bai Zuyu contains the oil content and oil extraction rate of the oil displacement agent group of 1% embodiment 1.Experiment condition is as shown in the table, experiment knot
Fruit is as shown in Figs. 1-2.
| Test oil sample | + 50% viscous crude of 50% light oil |
| Test water sample | Middle+0.1% polyacrylamide of low salinity water (salinity 10,000-30,000TDS) |
| Test temperature | Middle low temperature (58-62 DEG C) |
As can be seen that when using the middle low salinity water of polyacrylamide is contained as injection water, the embodiment of the present application
Oil displacement agent oil extraction rate can be made to be promoted to about 95% from about 70%, illustrate that the oil displacement agent of the embodiment of the present application can be significant
Improve crude oil production rate.
Experimental group 2
It investigates the blank group without oil displacement agent, contain 1% common oil displacement agent (by petroleum sulfonate and aliphatic alcohol polyethenoxy
Ether sulfate composition) group and the oil content and oil extraction rate of the oil displacement agent group containing 1% embodiment 1.Experiment condition such as following table
Shown, experimental result is as in Figure 3-5.
| Test oil sample | + 50% viscous crude of 50% light oil |
| Test water sample | Middle+0.4% polyacrylamide of concentrated water (salinity 50,000-80,000TDS) |
| Test temperature | High temperature (85-90 DEG C) |
As can be seen that when using the middle concentrated water of polyacrylamide is contained as injection water, common oil displacement agent (stone
Oily sulfonate+fatty alcohol polyoxyethylene ether sulfate) oil extraction rate can be made to be promoted to about 70% from about 50%, the application is real
The oil displacement agent for applying example can make oil extraction rate be promoted to about 95% from about 50%, illustrate that the oil displacement agent of the embodiment of the present application can
More significantly improve crude oil production rate.
Although embodiment disclosed by the application is as above, the content only for ease of understanding the application and use
Embodiment is not limited to the application.Technical staff in any the application fields, is taken off not departing from the application
Under the premise of the spirit and scope of dew, any modification and variation, but the application can be carried out in the form and details of implementation
Scope of patent protection, still should be subject to the scope of the claims as defined in the appended claims.
Claims (9)
1. a kind of oil displacement agent, the oil displacement agent includes each component of following weight percentage:
2. oil displacement agent according to claim 1, wherein the oil displacement agent includes each component of following weight percentage:
3. oil displacement agent according to claim 1 or 2, wherein the alcohol ether carboxylate is selected from alcohol phenol ether carboxylate, fatty alcohol
Any one or more in ether carboxylate and isomery alcohol ether carboxylate.
4. oil displacement agent according to claim 1 or 2, wherein the quaternary ammonium salt is double type quaternary ammonium salt.
5. oil displacement agent according to claim 4, wherein the quaternary ammonium salt is selected from bis- [(the dodecyl ethoxy first of trimethylene base
Base) ammonium chloride], trimethylene base bis- [(12/dodecyldimethylamine base) ammonium chlorides], bis- [(hexadecyldimethyl benzyl ammonium) chlorine of trimethylene base
Change ammonium], ethylene group bis- [(16/octadecyldimethyl) ammonium chlorides], ethylene group bis- [(hexadecyldimethyl benzyl ammonium) ammonium chlorides],
Appointing in ethylene group bis- [(octadecyldimethyl) ammonium chlorides], ethylene group bis- [(hexadecyl amide base dimethyl) ammonium chlorides]
It anticipates one or more.
6. oil displacement agent according to claim 1 or 2, wherein the sodium sulfate of polyethenoxy ether of fatty alcohol is selected from 12/ten
Four fatty alcohol polyoxyethylene ether (2) sodium sulphate, 12/14 fatty alcohol polyoxyethylene ether (3) sodium sulphate, 12/14 fat
Alcohol polyoxyethylene ether (5) sodium sulphate, 12/14 fatty alcohol polyoxyethylene ether (7) sodium sulphate and 12/14 fatty alcohol polyoxies
Any one or more in vinethene (9) sodium sulphate.
7. oil displacement agent according to claim 1 or 2, wherein the ester sodium salt is selected from docusate sodium, lauryl alcohol polyethylene glycol oxide
Any one or more in ether sulfosuccinates disodium, Aerosol OT.
8. the preparation method of oil displacement agent described in any one of -7 according to claim 1, which comprises in stirring condition
Under, optionally the isopropanol is added to the container, by the alcohol ether carboxylate, the fatty alcohol polyoxyethylene ether, the season
Ammonium salt, the sophorolipid, the aliphatic alcohol polyoxyethylene sulfonate and the optionally described sodium sulfate of polyethenoxy ether of fatty alcohol,
The ester sodium salt is added in the container, and stirring obtains the oil displacement agent to colorless and transparent.
9. according to the method described in claim 8, wherein, 25-50 DEG C at a temperature of each component stirred to colorless and transparent.
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| US20220363975A1 (en) * | 2019-10-24 | 2022-11-17 | China Petroleum & Chemical Corporation | Biological and chemical composite blockage removing agent and preparation process and use thereof |
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| CN113025440B (en) * | 2020-12-28 | 2022-06-24 | 山东新港化工有限公司 | Low-tension foam oil washing agent and preparation method and application thereof |
| CN115873577A (en) * | 2021-08-26 | 2023-03-31 | 中国石油化工股份有限公司 | Wettability regulator composition and preparation method and application thereof |
| CN115873577B (en) * | 2021-08-26 | 2023-11-28 | 中国石油化工股份有限公司 | Wettability regulator composition and preparation method and application thereof |
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