CN108300447A - A kind of nano particle foam system and preparation method thereof improving oil displacement efficiency - Google Patents

A kind of nano particle foam system and preparation method thereof improving oil displacement efficiency Download PDF

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Publication number
CN108300447A
CN108300447A CN201810131913.5A CN201810131913A CN108300447A CN 108300447 A CN108300447 A CN 108300447A CN 201810131913 A CN201810131913 A CN 201810131913A CN 108300447 A CN108300447 A CN 108300447A
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nano particle
solution
foam system
stabilizer
oil displacement
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Inventor
王文昌
狄勤丰
华帅
张景楠
叶峰
李原
贾欣昌
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University of Shanghai for Science and Technology
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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
    • C09K8/594—Compositions used in combination with injected gas, e.g. CO2 orcarbonated gas
    • 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
    • C09K8/60—Compositions for stimulating production by acting on the underground formation
    • C09K8/602—Compositions for stimulating production by acting on the underground formation containing surfactants
    • 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
    • C09K8/60—Compositions for stimulating production by acting on the underground formation
    • C09K8/84—Compositions based on water or polar solvents
    • C09K8/86—Compositions based on water or polar solvents containing organic compounds
    • C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
    • C09K8/882—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • C09K8/60—Compositions for stimulating production by acting on the underground formation
    • C09K8/92—Compositions for stimulating production by acting on the underground formation characterised by their form or by the form of their components, e.g. encapsulated material
    • C09K8/94—Foams
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/166—Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium
    • E21B43/168—Injecting a gaseous medium
    • 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
    • C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
    • C09K2208/10—Nanoparticle-containing well treatment fluids

Abstract

The present invention relates to a kind of nano particle foam systems and preparation method thereof improving oil displacement efficiency.The system is prepared according to the process for being gradually added into foaming agent, screener, reinforcing agent, stabilizer and nano particle, and the mass percent of five kinds of components is：Foaming agent 70%~80%, stabilizer 10%~15%, reinforcing agent 0.5%~5%, screener 0.5%~5%, nano particle 5%~10%.The novel foam system formed by this method is 60 DEG C in temperature, and foaming volume can reach 300ml under the reservoir condition that salinity is 6000mg/l, and defoaming half-life period can reach 400min.The stability of foam system is remarkably improved by this method, compared with usual foam system defoam half-life period can be improved 20% or so.Under the conditions of 60 DEG C of experimental temperature, using gas liquid ratio (2：1), injection rate (1.5ml/min) carries out the oil displacement experiment of foam flooding after first water drive 1.0PV, and after injecting foam slug 1.0PV, foam flooding can be improved oil displacement efficiency and reach 30% or so.

Description

A kind of nano particle foam system and preparation method thereof improving oil displacement efficiency
Technical field
The present invention relates to a kind of nano particle foam systems and preparation method thereof improving oil displacement efficiency, belong to petroleum works Improve recovery efficiency technique and experimental fluid mechanics field.
Background technology
As a kind of important strategic resource, oil plays a very important role in the national economic development.With me The rapid growth of state's economy, China are increasing to the demand of oil.But during the current many oil field developments in China come into The development difficulty in later stage, oil field gradually increases, and crude output gradually glides, and thus causes between crude supply and demand Contradiction is very serious.The crude output in China far can not meet the needs of national economy fast development, a large amount of crude oil at present It needs to rely on import acquisition (more than 60%).So development improves recovery efficiency technique, it is high-efficiency continuous steady to find a kind of holding oil field Surely the method produced, it has also become ensure petroleum industry sustainable development and the strategic task that notional economic stability increases.
Foam flooding technology is a creative raising recovery ratio new method, it is not only with profile control and the displacement of reservoir oil Dual function, and the shortcomings that also overcome gas drive easy has channeling.Foam flooding technical costs is low, securely and reliably, applicable oil reservoir Type, depth, range are relatively broad, are particularly suitable for High water cut, serious heterogeneity, there are the oil reservoir of crack or macropore, are Relatively cheap, one of the raising recovery ratio method with fine development prospect.But current oil field often uses foam system in oil reservoir High temperature and pressure high salinity condition stability inferior is relatively low, seriously limits the application at the scene of the technology.
Invention content
The purpose of the present invention is overcoming the deficiencies in the prior art, a kind of nano particle foam improving oil displacement efficiency is proposed System and preparation method thereof, the system strengthen the steady of conventional surfactants foam system using solid phase nano SiO 2 particle It is qualitative, it is stronger in high temperature and high salinity condition stability inferior, the oil displacement efficiency of foam flooding process can be significantly improved.
In order to solve the above-mentioned technical problem, the present invention is achieved by the following technical solutions：
A kind of nano particle foam system improving oil displacement efficiency, is added screener, reinforcing agent in usual foam system And nano particle；It is prepared according to the process for being gradually added into foaming agent, screener, reinforcing agent, stabilizer and nano particle, five The mass percent of kind of component is：Foaming agent 70%~80%, stabilizer 10%~15%, reinforcing agent 0.5%~5%, shielding Agent 0.5%~5%, nano particle 5%~10%.
The nano particle is the silica dioxide granule of hydrophilic, and average grain diameter is 10nm~50nm.The foaming agent For dodecyl sodium sulfate (AS), reinforcing agent is Tween-80 (Tween-80), and screener is lauryl sodium sulfate (K-12), Stabilizer is polyacrylamide (PAM).Applicable temperature is 15~80 DEG C；It is 2000~8000mg/l to be applicable in salinity.
A kind of preparation method for the nano particle foam system improving oil displacement efficiency, mainly includes the following steps：
1) stabilizer is poured slowly into the beaker equipped with water, beaker is gradually shaken in adition process, avoid stabilizer poly- And；It is slowly stirred 30~90min of solution using glass bar, the stabilizer in solution is made to be gradually swollen, it is static after the completion of dispersion to put It sets 10~24 hours, it is for use after so that stabilizer is fully swollen；
2) nanoparticle powder is poured into the beaker equipped with water, stirs 5~10min using glass bar, makes nano particle Powder is uniformly dispersed；By the solution configured be put into high-speed emulsifying machine under the conditions of 8000~15000r/min stir 3~ 5min, is finally put into ultrasonic oscillation instrument by solution, and 10~20min of dispersing nanoparticles solution is for use；
3) foaming agent powder is poured into the beaker equipped with water, stirs 5~10min using glass bar, makes foaming agent powder It is uniformly dispersed；Screener powder is added, stirs 5~10min using glass bar, enhancing is instilled after so that screener powder is uniformly dispersed Agent liquid is slowly stirred 3~5min using glass bar, and instillation reinforcing agent liquid is made to be uniformly dispersed；
4) stabilizer that swelling is completed in step 1) is gradually dropped in the solution of step 3) preparation, is added in step 2) Scattered nanoparticles solution, stirs evenly；
5) solution that step 4) obtains is diluted with water and is stirred evenly, form certain density nano particle foams System.
Compared with prior art, the present invention has the advantage that：
The present invention is remarkably improved the stability of foam system, compared with conventional foam system half-life period can be improved 20% Left and right.The foam system has the advantages that heat-resistant salt-resistant, can be widely applied to during the foam flooding of oil field.
Specific implementation mode
Further detailed description is made to the present invention with reference to specific embodiment.
In the present embodiment, screen is added in a kind of nano particle foam system improving oil displacement efficiency in usual foam system Cover agent, reinforcing agent and nano particle；According to the process for being gradually added into foaming agent, screener, reinforcing agent, stabilizer and nano particle It is prepared, the mass percent of five kinds of components is：Foaming agent 70%~80%, stabilizer 10%~15%, reinforcing agent 0.5% ~5%, screener 0.5%~5%, nano particle 5%~10%.
Embodiment 1
A kind of preparation method for the nano particle foam system improving oil displacement efficiency, the foam for being 5% with compound concentration For system, mainly include the following steps：
1) it is 1,000,000 polyacrylamide (PAM) 0.5g to use electronic balance weighing molecular weight, is poured slowly into equipped with 10g In the beaker of water, beaker is gradually shaken in adition process, avoids polyacrylamide coalescence.It is slowly stirred solution using glass bar 60min makes the polyacrylamide in solution be gradually swollen.It is static after the completion of dispersion to place 12 hours, keep polyacrylamide abundant It is for use after swelling.
2) nano SiO 2 particle powder (average grain diameter 10nm) 0.25g is weighed, powder is poured into the burning equipped with 10g water In cup, 5min is stirred using glass bar, nanoparticle powder is made to be uniformly dispersed.The solution configured is put into high-speed emulsifying machine 5min is stirred under the conditions of 12000r/min.Solution is finally put into ultrasonic oscillation instrument, dispersing nanoparticles solution 15min.
3) dodecyl sodium sulfate (AS) powder 4g is weighed, powder is poured into the beaker equipped with 10g water, glass bar is used 5min is stirred, foaming agent powder is made to be uniformly dispersed.0.15g solids lauryl sodium sulfate (K-12) powder is added, uses glass Stick stirs 5min, and 0.1g Tween-80s (Tween-80) liquid reinforcers liquid is instilled after so that screener powder is uniformly dispersed, and uses Glass bar is slowly stirred 3min, and instillation reinforcing agent liquid is made to be uniformly dispersed；
4) polyacrylamide that swelling is completed in step 1) is gradually dropped in the solution of step 3) preparation, adds step 2) scattered nanoparticles solution, stirs evenly in.
5) 65g water is added in the solution for obtaining step 4), and dilute solution to 100g forms a concentration of 5% foam system.
The novel foam system formed by the above method is 60 DEG C in temperature, and salinity is the reservoir condition of 6000mg/l Lower foaming volume can reach 300ml, and defoaming half-life period can reach 400min.Under the conditions of 60 DEG C of experimental temperature, use is identical Gas liquid ratio (2：1), identical injection rate (1.5ml/min) carries out foam flooding experiment after carrying out first water drive 1.0PV.Injection After foam slug 1.0PV, foam flooding can be improved oil displacement efficiency and reach 30% or so.It can be seen that this foam system can significantly improve bubble Foam oil displacement efficiency.
Embodiment 2
A kind of preparation method for the nano particle foam system improving oil displacement efficiency, the foam for being 5% with compound concentration For system, mainly include the following steps：
1) it is 1,000,000 polyacrylamide (PAM) 0.5g to use electronic balance weighing molecular weight, is poured slowly into equipped with 10g In the beaker of water, beaker is gradually shaken in adition process, avoids polyacrylamide coalescence.It is slowly stirred solution using glass bar 30min makes the polyacrylamide in solution be gradually swollen.It is static after the completion of dispersion to place 12 hours, keep polyacrylamide abundant It is for use after swelling.
2) nano SiO 2 particle powder (average grain diameter 10nm) 0.25g is weighed, powder is poured into the burning equipped with 10g water In cup, 5min is stirred using glass bar, nanoparticle powder is made to be uniformly dispersed.The solution configured is put into high-speed emulsifying machine 3min is stirred under the conditions of 8000r/min.Solution is finally put into ultrasonic oscillation instrument, dispersing nanoparticles solution 10min.
3) dodecyl sodium sulfate (AS) powder 4g is weighed, powder is poured into the beaker equipped with 10g water, glass bar is used 5min is stirred, foaming agent powder is made to be uniformly dispersed.0.15g solids lauryl sodium sulfate (K-12) powder is added, uses glass Stick stirs 5min, and 0.1g Tween-80s (Tween-80) liquid reinforcers liquid is instilled after so that screener powder is uniformly dispersed, and uses Glass bar is slowly stirred 3min, and instillation reinforcing agent liquid is made to be uniformly dispersed；
4) polyacrylamide that swelling is completed in step 1) is gradually dropped in the solution of step 3) preparation, step 2) is added In scattered nanoparticles solution, stir evenly.
5) 65g water is added in the solution for obtaining step 4), and dilute solution to 100g forms a concentration of 5% foam system.
The novel foam system formed by the above method is 15 DEG C in temperature, and salinity is the reservoir condition of 2000mg/l Lower foaming volume can reach 320ml, and defoaming half-life period can reach 480min.Under the conditions of 15 DEG C of experimental temperature, use is identical Gas liquid ratio (2：1), identical injection rate (1.5ml/min) carries out foam flooding experiment after carrying out first water drive 1.0PV.Injection After foam slug 1.0PV, foam flooding can be improved oil displacement efficiency and reach 35% or so.It can be seen that this foam system can significantly improve bubble Foam oil displacement efficiency.
Embodiment 3
A kind of preparation method for the nano particle foam system improving oil displacement efficiency, the foam for being 5% with compound concentration For system, mainly include the following steps：
1) it is 1,000,000 polyacrylamide (PAM) 0.5g to use electronic balance weighing molecular weight, is poured slowly into equipped with 10g In the beaker of water, beaker is gradually shaken in adition process, avoids polyacrylamide coalescence.It is slowly stirred solution using glass bar 90min makes the polyacrylamide in solution be gradually swollen.It is static after the completion of dispersion to place 12 hours, keep polyacrylamide abundant It is for use after swelling.
2) nano SiO 2 particle powder (average grain diameter 10nm) 0.25g is weighed, powder is poured into the burning equipped with 10g water In cup, 6min is stirred using glass bar, nanoparticle powder is made to be uniformly dispersed.The solution configured is put into high-speed emulsifying machine 5min is stirred under the conditions of 15000r/min.Solution is finally put into ultrasonic oscillation instrument, dispersing nanoparticles solution 20min.
3) dodecyl sodium sulfate (AS) powder 4g is weighed, powder is poured into the beaker equipped with 10g water, glass bar is used 7min is stirred, foaming agent powder is made to be uniformly dispersed.0.15g solids lauryl sodium sulfate (K-12) powder is added, uses glass Stick stirs 7min, and 0.1g Tween-80s (Tween-80) liquid reinforcers liquid is instilled after so that screener powder is uniformly dispersed, and uses Glass bar is slowly stirred 4min, and instillation reinforcing agent liquid is made to be uniformly dispersed；
4) polyacrylamide that swelling is completed in step 1) is gradually dropped in the solution of step 3) preparation, step 2) is added In scattered nanoparticles solution, stir evenly.
5) 65g water is added in the solution for obtaining step 4), and dilute solution to 100g forms a concentration of 5% foam system.
The novel foam system formed by the above method is 80 DEG C in temperature, and salinity is the reservoir condition of 8000mg/l Lower foaming volume can reach 280ml, and defoaming half-life period can reach 350min.Under the conditions of 80 DEG C of experimental temperature, use is identical Gas liquid ratio (2：1), identical injection rate (1.5ml/min) carries out foam flooding experiment after carrying out first water drive 1.0PV.Injection After foam slug 1.0PV, foam flooding can be improved oil displacement efficiency and reach 28% or so.It can be seen that this foam system can significantly improve bubble Foam oil displacement efficiency.
Embodiment 4
A kind of preparation method for the nano particle foam system improving oil displacement efficiency, the foam for being 3% with compound concentration For system, mainly include the following steps：
1) it is 1,000,000 polyacrylamide (PAM) 0.3g to use electronic balance weighing molecular weight, is poured slowly into equipped with 10g In the beaker of water, beaker is gradually shaken in adition process, avoids polyacrylamide coalescence.It is slowly stirred solution using glass bar 60min makes the polyacrylamide in solution be gradually swollen.It is static after the completion of dispersion to place 12 hours, keep polyacrylamide abundant It is for use after swelling.
2) nano SiO 2 particle powder (average grain diameter 10nm) 0.15g is weighed, powder is poured into the burning equipped with 10g water In cup, 6min is stirred using glass bar, nanoparticle powder is made to be uniformly dispersed.The solution configured is put into high-speed emulsifying machine 5min is stirred under the conditions of 12000r/min.Solution is finally put into ultrasonic oscillation instrument, dispersing nanoparticles solution 15min.
3) dodecyl sodium sulfate (AS) powder 2.4g is weighed, powder is poured into the beaker equipped with 10g water, glass is used Stick stirs 6min, and foaming agent powder is made to be uniformly dispersed.0.09g solids lauryl sodium sulfate (K-12) powder is added, uses glass Glass stick stirs 6min, and 0.06g Tween-80s (Tween-80) liquid reinforcers liquid is instilled after so that screener powder is uniformly dispersed, It is slowly stirred 4min using glass bar, instillation reinforcing agent liquid is made to be uniformly dispersed；
4) polyacrylamide that swelling is completed in step 1) is gradually dropped in the solution of step 3) preparation, step 2) is added In scattered nanoparticles solution, stir evenly.
5) 67g water is added in the solution for obtaining step 4), and dilute solution to 100g forms a concentration of 3% foam system.
The novel foam system formed by the above method is 60 DEG C in temperature, and salinity is the reservoir condition of 6000mg/l Lower foaming volume can reach 250ml, and defoaming half-life period can reach 300min.Under the conditions of 60 DEG C of experimental temperature, use is identical Gas liquid ratio (2：1), identical injection rate (1.5ml/min) carries out foam flooding experiment after carrying out first water drive 1.0PV.Injection After foam slug 1.0PV, foam flooding can be improved oil displacement efficiency and reach 25% or so.It can be seen that this foam system can significantly improve bubble Foam oil displacement efficiency.

Claims (5)

1. it is a kind of improve oil displacement efficiency nano particle foam system, in usual foam system be added screener, reinforcing agent and Nano particle；It is characterized in that, according to be gradually added into the process of foaming agent, screener, reinforcing agent, stabilizer and nano particle into Row is prepared, and the mass percent of five kinds of components is：Foaming agent 70%~80%, stabilizer 10%~15%, reinforcing agent 0.5%~ 5%, screener 0.5%~5%, nano particle 5%~10%.
2. the nano particle foam system according to claim 1 for improving oil displacement efficiency, which is characterized in that the nanometer Grain is the silica dioxide granule of hydrophilic, and average grain diameter is 10nm~50nm.
3. the nano particle foam system according to claim 1 for improving oil displacement efficiency, which is characterized in that the foaming agent For dodecyl sodium sulfate, reinforcing agent is Tween-80, and screener is lauryl sodium sulfate, and stabilizer is polyacrylamide.
4. the nano particle foam system according to claim 1 for improving oil displacement efficiency, which is characterized in that foam system Applicable temperature is 15~80 DEG C；It is 2000~8000mg/l to be applicable in salinity.
5. a kind of preparation method for the nano particle foam system improving oil displacement efficiency, which is characterized in that main includes following step Suddenly：
1) stabilizer is poured slowly into the beaker equipped with water, beaker is gradually shaken in adition process, avoid stabilizer coalescence；Make Be slowly stirred 30~90min of solution with glass bar, the stabilizer in solution made to be gradually swollen, after the completion of dispersion it is static place 10~ It is 24 hours, for use after so that stabilizer is fully swollen；
2) nanoparticle powder is poured into the beaker equipped with water, stirs 5~10min using glass bar, makes nanoparticle powder It is uniformly dispersed；The solution configured is put into high-speed emulsifying machine to stir 3~5min under the conditions of 8000~15000r/min, most Solution is put into ultrasonic oscillation instrument afterwards, 10~20min of dispersing nanoparticles solution is for use；
3) foaming agent powder is poured into the beaker equipped with water, stirs 5~10min using glass bar, foaming agent powder is made to disperse Uniformly；Screener powder is added, stirs 5~10min using glass bar, reinforcing agent liquid is instilled after so that screener powder is uniformly dispersed Body is slowly stirred 3~5min using glass bar, and instillation reinforcing agent liquid is made to be uniformly dispersed；
4) stabilizer that swelling is completed in step 1) is gradually dropped in the solution of step 3) preparation, adds dispersion in step 2) Good nanoparticles solution, stirs evenly；
5) solution that step 4) obtains is diluted with water and is stirred evenly, form certain density nano particle foam system.
CN201810131913.5A 2018-02-09 2018-02-09 A kind of nano particle foam system and preparation method thereof improving oil displacement efficiency Pending CN108300447A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111019624A (en) * 2019-12-23 2020-04-17 郑州洁灵科技有限公司 Preparation and application of nano microemulsion for oil displacement
CN112375554A (en) * 2020-11-25 2021-02-19 滨州市广友石油科技有限公司 Nano foam oil displacement agent and preparation method thereof

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CN102977872A (en) * 2012-11-29 2013-03-20 辽宁石油化工大学 Enhanced foam oil-displacing agent for improving oil recovery rate in tertiary oil recovery, and preparation method thereof
CN103194191A (en) * 2013-03-29 2013-07-10 中国地质大学（武汉） Foam drilling fluid based on nano silicon dioxide material
CN104099076A (en) * 2014-07-10 2014-10-15 中国石油大学(华东) Fluorescent silica nano particle composite foam system for oil-gas field
US20150126417A1 (en) * 2012-05-25 2015-05-07 Rhodia Operations Surfactant composition
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US20150126417A1 (en) * 2012-05-25 2015-05-07 Rhodia Operations Surfactant composition
CN102746841A (en) * 2012-06-29 2012-10-24 中国石油大学(华东) Nanoparticle-added composite foam system used for oil and gas field and preparation method thereof
CN102977872A (en) * 2012-11-29 2013-03-20 辽宁石油化工大学 Enhanced foam oil-displacing agent for improving oil recovery rate in tertiary oil recovery, and preparation method thereof
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111019624A (en) * 2019-12-23 2020-04-17 郑州洁灵科技有限公司 Preparation and application of nano microemulsion for oil displacement
CN112375554A (en) * 2020-11-25 2021-02-19 滨州市广友石油科技有限公司 Nano foam oil displacement agent and preparation method thereof

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Application publication date: 20180720