CN105754570A - Supercritical CO2 microemulsion formed by anionic-nonionic amphoteric surfactant - Google Patents

Supercritical CO2 microemulsion formed by anionic-nonionic amphoteric surfactant Download PDF

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CN105754570A
CN105754570A CN201610171971.1A CN201610171971A CN105754570A CN 105754570 A CN105754570 A CN 105754570A CN 201610171971 A CN201610171971 A CN 201610171971A CN 105754570 A CN105754570 A CN 105754570A
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supercritical
surfactant
microemulsion
moon
cosolvent
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CN105754570B (en
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宫厚健
朱腾
董明哲
李亚军
徐龙
桑茜
张涛
李康宁
胡航
张烈
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China University of Petroleum East China
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
    • C09K8/584—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific surfactants
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C43/00—Ethers; Compounds having groups, groups or groups
    • C07C43/02—Ethers
    • C07C43/03—Ethers having all ether-oxygen atoms bound to acyclic carbon atoms
    • C07C43/04—Saturated ethers
    • C07C43/10—Saturated ethers of polyhydroxy compounds
    • C07C43/11—Polyethers containing —O—(C—C—O—)n units with ≤ 2 n≤ 10
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
    • C09K8/594—Compositions used in combination with injected gas, e.g. CO2 orcarbonated gas
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids

Abstract

The invention discloses a supercritical CO2 microemulsion formed by an anionic-nonionic amphoteric surfactant. 100 parts by weight of the supercritical CO2 microemulsion are prepared from the following components: 0.1-20 parts of water, 1*10<-4>-1*10<-1> parts of the surfactant, 1-10 parts of a cosolvent and the balance of CO2. The preparation method of the supercritical CO2 microemulsion comprises steps as follows: (1) the cosolvent in certain mass is mixed with water at the temperature of 20-25 DEG C and stirred uniformly; (2) the anionic-nonionic amphoteric surfactant in certain mass is weighed and added to a mixed solution of the water and the cosolvent and stirred to be dissolved; (3) the mixed solution is added to a transparent high-pressure container, CO2 is introduced, the mixture is stirred and completely miscible, and the supercritical CO2 microemulsion is formed. The anionic-nonionic amphoteric surfactant does not have a cloud point and has good solubility, good hydrophilia and a wide application range; ion components are simple, and the interface stability is high; polar heads are distributed more uniformly in a concentrated manner through the single-stranded surfactant, and the hydrophilia is higher; the surfactant has high solulbilizing power and is low in cost and suitable for large-scale application in an oil field.

Description

A kind of supercritical CO formed by the moon-non-zwitterionic surfactant2Microemulsion
Technical field
The present invention relates to oil exploitation and technical field of oilfield chemistry, be specifically related to a kind of by the moon-non-zwitterionic surfactant shape The supercritical CO become2Microemulsion.
Background technology
Supercritical CO2Microemulsion system has been widely used in the necks such as extraction, organic synthesis, nano material preparation and cleaning Territory, and show the performance of excellence.In terms of tertiary oil recovery, CO2Technology of reservoir sweep can be to hyposmosis, viscous crude class oil reservoir Effectively develop.Along with going deep into of research, CO2Application in oilfield exploitation get more and more, domestic in Jiangsu, The oil fields such as Central Plains, grand celebration, triumph start on-the-spot test.And abroad, since the eighties in 20th century, CO2Displacement of reservoir oil skill Art realizes successful Application in the U.S., the former Soviet Union, Canada, Algerian low-permeability oil deposit, and this technology has become For improving the necessary means of exploitation effect.CO2Major advantage be easily accessible supercriticality, its critical temperature and pressure It is respectively 31.26 DEG C and 7.2MPa.When temperature and pressure is higher than critical point, CO2In a supercritical state, its character meeting Change, as density be bordering on liquid, viscosity is bordering on gas, diffusion coefficient is liquid 100 times, thus have higher Solvability.The CO of supercriticality2Dissolubility increase is conducive to improving total mass transfer rate, it addition, the structure of oil reservoir has It is beneficial to increase CO2It is prone to mixed phase with the touch opportunity of crude oil, so CO2Mixed phase drive can meet some oil fields to inject molten The rigors of agent.
But, due to crude oil and CO2Viscosity difference relatively big, gas flow is much larger than liquid, so gas phase fltting speed is very Hurry up, displacement process there will be gas channeling phenomenon, may result in oil displacement efficiency and reduce and the low effective circulation of gas.Therefore improve CO2With the mobility ratio of crude oil, preventing has channeling is CO2Key issue in displacement process.The water-air two-phase flow grown up at present Injection method (WAG) can slow down has channeling to a certain extent, improves gas drive effect.But generally there is water filling in low-permeability oil deposit Difficulty, when carrying out water alternating gas injection, can run into the problem that injection pressure is higher.Also researcher is had to propose to utilize CO2Bubble Foam drives and improves recovery ratio, i.e. makes CO by addition surfactant2Gas forms foam in the earth formation, increases the stream of system Dynamic resistance, improves sweep efficiency.The most many experiences and research show, CO2The performance of foam flooding is better than CO2Drive, special It not more significantly for heterogeneous reservoir effect.But owing in stratum, pressure is very big, foam in migration process gas to meeting Liquid film and formation water spread, is actually hardly formed preferable foam system.
In recent years, along with the development of synthesis of surfactant technology, researcher is had to be devoted to develop novel surfactant, It is allowed to be easily soluble in CO2, it is used for forming foam flooding system or for reducing thick oil viscosity, achieves good effect. Also researcher is had to start to focus on supercritical CO2Emulsions ties up to the application in tertiary oil recovery and study mechanism, as novel double Tail surface active agent (DOG-9), energy and CO2Forming emulsion with water, its mobility in porous body reduces, can be effectively Control the channelling of gas.Patent 201410380153.3 provides one and utilizes AOT (two-(2-ethylhexyl) 2-Sulfosuccinic acids Sodium constructs supercritical CO as surfactant2The method of microemulsion and be used for improving recovery ratio, result shows that AOT easily makes CO2Supercritical CO is formed with water2Microemulsion, and this system may be used for improving oil recovery factor, but AOT be pair alkyl Chain anion surfactant, building-up process is complicated, and product cost is high, is not suitable for oil field large-scale application.Patent 201510053933.1 utilize nonionic surfactant Fatty alcohol polyoxyethylene polyoxypropylene ether and alkylphenol-polyethenoxy polyoxy Propylene ether constructs supercritical CO2Microemulsion system, and study for the mixed phase with crude oil, can be used for improving to this system Oil recovery factor.This kind of Surfactants exhibit goes out the strongest close CO2Character, but the one of nonionic surfactant shows Work feature is to there is cloud point, and when temperature is higher than cloud point, its hydrophilic is deteriorated, and easily separates out so that system becomes cloudy.And Formation temperature is the highest, which limits the application at Oil Field of this type of surfactant.If it is simple by anion Surfactant compounds with nonionic surfactant, then can increase too much foreign ion in system, affect microemulsion circle The distribution of surface layer electric charge, thus reduce the stability of microemulsion.Meanwhile, compounding use is for nonionic surfactant itself Cloud point character do not have essence change.
Summary of the invention
The deficiency existed for above-mentioned prior art, the present invention provides a kind of by surpassing that the moon-non-zwitterionic surfactant is formed Critical CO2Microemulsion, it utilizes the moon-non-zwitterionic surfactant of strand to carry out emulsifying, there is not cloud point, and improve The interface stability of microemulsion system.
For achieving the above object, the present invention adopts the following technical scheme that
A kind of supercritical CO formed by the moon-non-zwitterionic surfactant2Microemulsion, in terms of 100 weight portions, by following Component forms: water 0.1～20 parts, surfactant 1 × 10-4～1 × 10-1Part, cosolvent 1～10 parts, CO2Surplus；
Described surfactant is the moon-non-zwitterionic surfactant, and structural formula is as follows:
Wherein, m=5～18, n=1～50, p=1～30, and m, n, p be integer；
R-For the one in sulfate radical, sulfonate radical, carbonate or phosphate radical.
Preferably, described a kind of supercritical CO formed by the moon-non-zwitterionic surfactant2Microemulsion, with 100 weight Part meter, the content of water is 0.1～1 part, and the content of surfactant is 1 × 10-4～1 × 10-2Part, the content of cosolvent is 5～10 Part, CO2Surplus.
Preferably, in described anion-nonionic surfactant molecule, long alkyl chains m is 7～12；
Preferably, in described anion-nonionic surfactant molecule, polyoxypropylene chain length n is 11～30；
Preferably, in described anion-nonionic surfactant molecule, polyoxyethylene chain length p is 15-20；
Preferably, R in described anion-nonionic surfactant molecule-For sulfonate radical or carbonate；
Preferably, described cosolvent is methanol or ethanol；
The invention also discloses a kind of supercritical CO formed by the moon-non-zwitterionic surfactant2The preparation side of microemulsion Method, step is as follows:
(1) at 20-25 DEG C, by cosolvent and the water mixing of certain mass, and stir；
(2) weighing in the mixed liquor that the anion-nonionic surfactant of certain mass joins water and cosolvent, stirring makes it molten Solve；
(3) above-mentioned mixed liquor is joined in visual high-pressure bottle, be passed through CO2, and stir so that it is mixed phase completely, formed Supercritical CO2Microemulsion.
Surfactant molecule of the present invention contains the alkyl chain of oleophylic, parent CO2Polyoxypropylene group, both parent CO2 The most hydrophilic oxyalkyl chain, and the hydrophilic based polar head of R；By lipophilic group-parent CO2The arrangement of group-hydrophilic group, Ke Yiyou Effect ground improves interfacial activity, reduces the accumulation between hydrophobic chain overlapping, effectively hinders the flocculation between microemulsion drop, Improve the stability of microemulsion；Parent CO2Group in middle arrangement, play sterically hindered effect, prevent surfactant from sending out Rubber is reunited and is collected, and improves the solubilising power of surfactant molecule, reduces the consumption of surfactant, cost-effective；And CO2 Being considered as weak Lewis acid, R polar head can make whole surfactant molecule electronegative and present the characteristic of Lewis alkali, thus The surfactant of the present invention can be as nucleopilic reagent and CO2Have an effect with the form of covalent bond, improve the stability at interface And CO2Solubilising power, and in field use, owing to the environmental surfaces such as clay, sand material are electronegative, deposit with electronegative form The surfactant molecule absorption in ambient impurities in use few, stability is more preferable.
The present invention uses strand surfactant can reach to orient scattered action effect, enables the hydrophilic group of surfactant Fully there is hydrogen bond action with water, improve interface performance.And the surfactant of traditional highly branched chain, because side chain is many, hydrophobic chain Between easily interact, make the polar head of surfactant excessively disperse, the interaction with water weakens, thus hydrophilic The best, the ability forming microemulsion micelle also decreases, and using effect is bad.
The present invention use short chain alcohol as cosolvent, be because cosolvent chain length and and strand surfactant of the present invention Join degree relevant with the solubilizing effect of system and stability.Short chain alcohol is shorter due to chain length, sterically hindered little, when participating in constituting During microemulsion, the microemulsion interfacial film space constituting strand surfactant will not produce more extruding, makes interface energy reduce, Be conducive to interface stability, and when arranging at interface, due to strand surfactant lipophilic group-parent CO2The arrangement of group-hydrophilic group, At CO2For foreign minister, water is in the microemulsion of internal phase, and the hydrophobic group of short chain alcohol is distant with the hydrophobic group of surfactant, dredges Water effect is less, and the microemulsion interface that will not participate in short chain alcohol produces interference effect, can increase surfactant super simultaneously Critical CO2In dissolubility.
The invention has the beneficial effects as follows:
(1) there is cloud point in use in common nonionic surfactant, when using temperature higher than 50-60 DEG C, generally because of turbid Point appearance and affect use., there is not cloud point in the moon of the application-non-zwitterionic surfactant, dissolubility is good, hydrophilic Good, it is difficult to separate out, more than 80 DEG C still can normally use, applied widely；
(2) present invention selects a kind of the moon-non-surface-active agent, not uses the compound system of kinds of surface activating agent, in microemulsion Ion component is simple, decreases the impact on microemulsion interface, is conducive to improving the interface stability of microemulsion；
(3) strand surfactant makes polar head be distributed more uniform concentration, and strong with hydrone effect, hydrophilic is higher；
(4) parent CO2Group in middle arrangement, play sterically hindered effect, prevent surfactant generation micelle from assembling, improve The solubilising power of surfactant molecule, reduces the consumption of surfactant, cost-effective；
(5) with low cost, it is suitable for oil field large-scale application.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further described.
Embodiment 1
A kind of supercritical CO formed by the moon-non-zwitterionic surfactant2Microemulsion, in terms of 100 weight portions, by following Component forms: 1 part of water, surfactant 1.0 × 10-2Part, cosolvent 10 parts, CO2Surplus.Surface activity in this composition Consisting of of agent molecule: m=7, n=1, p=10, R-For carbonate；Cosolvent is ethanol.Through supercritical CO2Balance each other Instrument record this system cloud-point pressure when 50 DEG C be the density under 18.7MPa, cloud-point pressure be 0.94g/mL.
Embodiment 2
A kind of supercritical CO formed by the moon-non-zwitterionic surfactant2Microemulsion, in terms of 100 weight portions, by following Component forms: 1.0 parts of water, surfactant 1.0 × 10-2Part, cosolvent 10 parts, CO2Surplus.In this composition, live in surface Consisting of of property agent molecule: m=12, n=30, p=10, R-For sulfate radical；Cosolvent is ethanol.Through supercritical CO2Equal Weighing apparatus instrument record this system cloud-point pressure when 50 DEG C be the density under 13.1MPa, cloud-point pressure be 0.82g/mL.
Embodiment 3
A kind of supercritical CO formed by the moon-non-zwitterionic surfactant2Microemulsion, in terms of 100 weight portions, by following Component forms: 1.0 parts of water, surfactant 1.5 × 10-3Part, cosolvent 10 parts, CO2Surplus.In this composition, live in surface Consisting of of property agent molecule: m=8, n=11, p=13, R-For carbonate；Cosolvent is ethanol.Through supercritical CO2Equal Weighing apparatus instrument record this system cloud-point pressure when 50 DEG C be the density under 12.2MPa, cloud-point pressure be 0.80g/mL.
Embodiment 4
A kind of supercritical CO formed by the moon-non-zwitterionic surfactant2Microemulsion, in terms of 100 weight portions, by following Component forms: 1.0 parts of water, surfactant 1.2 × 10-3Part, cosolvent 10 parts, CO2Surplus.In this composition, live in surface Consisting of of property agent molecule: m=5, n=13, p=15, R-For phosphate radical；Cosolvent is ethanol.Through supercritical CO2Equal Weighing apparatus instrument record this system cloud-point pressure when 50 DEG C be the density under 11.7MPa, cloud-point pressure be 0.70g/mL.
Embodiment 5
A kind of supercritical CO formed by the moon-non-zwitterionic surfactant2Microemulsion, in terms of 100 weight portions, by following Component forms: 0.1 part of water, surfactant 1.0 × 10-4Part, cosolvent 5 parts, CO2Surplus.Surface activity in this composition Consisting of of agent molecule: m=18, n=30, p=20, R-For carbonate；Cosolvent is methanol.Through supercritical CO2Equal Weighing apparatus instrument record this system cloud-point pressure when 50 DEG C be the density under 12.0MPa, cloud-point pressure be 0.74g/mL.
Embodiment 6
A kind of supercritical CO formed by the moon-non-zwitterionic surfactant2Microemulsion, in terms of 100 weight portions, by following Component forms: 1.0 parts of water, surfactant 1.0 × 10-2Part, cosolvent 10 parts, CO2Surplus.In this composition, live in surface Consisting of of property agent molecule: m=6, n=20, p=28, R-For sulfonate radical；Cosolvent is ethanol.Through supercritical CO2Equal Weighing apparatus instrument record this system cloud-point pressure when 50 DEG C be the density under 14.9MPa, cloud-point pressure be 0.85g/mL,.
Embodiment 7
A kind of supercritical CO formed by the moon-non-zwitterionic surfactant2Microemulsion, in terms of 100 weight portions, by following Component forms: 1.0 parts of water, surfactant 1.0 × 10-2Part, cosolvent 10 parts, CO2Surplus.In this composition, live in surface Consisting of of property agent molecule: m=10, n=8, p=10, R-For sulfonate radical；Cosolvent is ethanol.Through supercritical CO2Equal Weighing apparatus instrument record this system cloud-point pressure when 50 DEG C be the density under 13.8MPa, cloud-point pressure be 0.83g/mL.
Embodiment 8
A kind of supercritical CO formed by the moon-non-zwitterionic surfactant2Microemulsion, in terms of 100 weight portions, by following Component forms: 0.1 part of water, surfactant 1.0 × 10-4Part, cosolvent 5 parts, CO2Surplus.Surface activity in this composition Consisting of of agent molecule: m=16, n=4, p=6, R-For sulfonate radical；Cosolvent is methanol.Through supercritical CO2Balance each other instrument Record this system cloud-point pressure when 50 DEG C be the density under 12.8MPa, cloud-point pressure be 0.73g/mL.
Embodiment 9
A kind of supercritical CO formed by the moon-non-zwitterionic surfactant2Microemulsion, in terms of 100 weight portions, by following Component forms: 0.1 part of water, surfactant 1.0 × 10-4Part, cosolvent 5 parts, CO2Surplus.Surface activity in this composition Consisting of of agent molecule: m=16, n=4, p=6, R-For sulfonate radical；Cosolvent is methanol.Through supercritical CO2Balance each other instrument Record this system cloud-point pressure when 80 DEG C be the density under 10.6MPa, cloud-point pressure be 0.62g/mL.
Last it should be noted that, above example is only in order to illustrate technical scheme, rather than the present invention is protected model The restriction enclosed, although having made to explain to the present invention with reference to preferred embodiment, those of ordinary skill in the art should manage Solve, technical scheme can be modified or equivalent, without deviating from technical solution of the present invention essence and Scope.

Claims (8)

1. the supercritical CO formed by the moon-non-zwitterionic surfactant2Microemulsion, it is characterised in that with 100 weights Amount part meter, composed of the following components: water 0.1～20 parts, surfactant 1 × 10-4～1 × 10-1Part, cosolvent 1～10 parts, CO2Surplus；
Described surfactant is the moon-non-zwitterionic surfactant, and structural formula is as follows:
Wherein, m=5～18, n=1～50, p=1～30, and m, n, p be integer；
R-For the one in sulfate radical, sulfonate radical, carbonate or phosphate radical.
A kind of supercritical CO formed by the moon-non-zwitterionic surfactant2Microemulsion, it is special Levy and be, described a kind of supercritical CO formed by the moon-non-zwitterionic surfactant2Microemulsion, in terms of 100 weight portions, The content of water is 0.1～1 part, and the content of surfactant is 1 × 10-4～1 × 10-2Part, the content of cosolvent is 5～10 parts, CO2Surplus.
A kind of supercritical CO formed by the moon-non-zwitterionic surfactant2Microemulsion, It is characterized in that, in described anion-nonionic surfactant molecule, long alkyl chains m is 7～12.
A kind of supercritical CO formed by the moon-non-zwitterionic surfactant2Microemulsion, It is characterized in that, in described anion-nonionic surfactant molecule, polyoxypropylene chain length n is 11～30.
A kind of supercritical CO formed by the moon-non-zwitterionic surfactant2Microemulsion, It is characterized in that, in described anion-nonionic surfactant molecule, polyoxyethylene chain length p is 15-20.
A kind of supercritical CO formed by the moon-non-zwitterionic surfactant2Microemulsion, It is characterized in that, R in described anion-nonionic surfactant molecule-For sulfonate radical or carbonate.
A kind of supercritical CO formed by the moon-non-zwitterionic surfactant2Microemulsion, It is characterized in that, described cosolvent is methanol or ethanol.
A kind of supercritical CO formed by the moon-non-zwitterionic surfactant2Microemulsion Preparation method, it is characterised in that step is as follows:
(1) at 20-25 DEG C, by cosolvent and the water mixing of certain mass, and stir；
(2) weighing in the mixed liquor that the anion-nonionic surfactant of certain mass joins water and cosolvent, stirring makes it molten Solve；
(3) above-mentioned mixed liquor is joined in visual high-pressure bottle, be passed through CO2, and stir so that it is mixed phase completely, formed Supercritical CO2Microemulsion.
CN201610171971.1A 2016-03-24 2016-03-24 A kind of supercritical CO formed by cloudy-non-zwitterionic surfactant2Microemulsion Expired - Fee Related CN105754570B (en)

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CN110373270A (en) * 2019-07-16 2019-10-25 中国烟草总公司郑州烟草研究院 A kind of method that additive and extraction essential oil are used in plants essential oil extraction
CN111849449A (en) * 2020-06-28 2020-10-30 中国石油大学(北京) Supercritical CO2Oil displacement system and oil displacement method
CN112646561A (en) * 2020-09-02 2021-04-13 中国石油大学(北京) Oil displacement agent suitable for increasing recovery ratio of oil reservoir and preparation method and application thereof
CN115161002A (en) * 2022-07-27 2022-10-11 中国石油大学(华东) Method for controlling gas channeling and gas injection pressure in carbon dioxide sequestration or oil displacement by utilizing aerosol

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CN103965856A (en) * 2013-02-05 2014-08-06 中国石油化工股份有限公司 Polymer and surfactant binary system for oil displacement, and oil displacement method
CN104610953A (en) * 2015-02-02 2015-05-13 中国石油大学(华东) Supercritical carbon dioxide microemulsion capable of reducing minimum miscible pressure of carbon dioxide and crude oil

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CN102660251A (en) * 2012-04-25 2012-09-12 中国石油化工股份有限公司 Temperature-resistant salt-tolerant foaming agent carbon dioxide flooding profile control and preparation method thereof
CN103965856A (en) * 2013-02-05 2014-08-06 中国石油化工股份有限公司 Polymer and surfactant binary system for oil displacement, and oil displacement method
CN104610953A (en) * 2015-02-02 2015-05-13 中国石油大学(华东) Supercritical carbon dioxide microemulsion capable of reducing minimum miscible pressure of carbon dioxide and crude oil

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CN110373270A (en) * 2019-07-16 2019-10-25 中国烟草总公司郑州烟草研究院 A kind of method that additive and extraction essential oil are used in plants essential oil extraction
CN111849449A (en) * 2020-06-28 2020-10-30 中国石油大学(北京) Supercritical CO2Oil displacement system and oil displacement method
CN111849449B (en) * 2020-06-28 2021-10-22 中国石油大学(北京) Supercritical CO2Oil displacement system and oil displacement method
CN112646561A (en) * 2020-09-02 2021-04-13 中国石油大学(北京) Oil displacement agent suitable for increasing recovery ratio of oil reservoir and preparation method and application thereof
CN115161002A (en) * 2022-07-27 2022-10-11 中国石油大学(华东) Method for controlling gas channeling and gas injection pressure in carbon dioxide sequestration or oil displacement by utilizing aerosol
CN115161002B (en) * 2022-07-27 2024-03-01 中国石油大学(华东) Method for controlling carbon dioxide burial or gas channeling in oil displacement and controlling gas injection pressure by utilizing aerosol

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