CN103937478B - Preparation method of nanofluid for improving oil recovery - Google Patents
Preparation method of nanofluid for improving oil recovery Download PDFInfo
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- 238000011084 recovery Methods 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 81
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000002105 nanoparticle Substances 0.000 claims abstract description 23
- 239000004094 surface-active agent Substances 0.000 claims abstract description 20
- 239000008367 deionised water Substances 0.000 claims abstract description 15
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 15
- 238000003756 stirring Methods 0.000 claims abstract description 14
- 238000005406 washing Methods 0.000 claims abstract description 10
- 239000006185 dispersion Substances 0.000 claims abstract description 8
- 239000000243 solution Substances 0.000 claims abstract description 8
- 235000019441 ethanol Nutrition 0.000 claims abstract description 7
- 239000011259 mixed solution Substances 0.000 claims abstract description 7
- 239000011858 nanopowder Substances 0.000 claims abstract description 6
- 238000001291 vacuum drying Methods 0.000 claims abstract description 6
- 239000002904 solvent Substances 0.000 claims abstract description 5
- 238000001035 drying Methods 0.000 claims abstract description 4
- 238000001914 filtration Methods 0.000 claims abstract description 4
- 239000003921 oil Substances 0.000 claims description 59
- 239000012530 fluid Substances 0.000 claims description 56
- 238000006073 displacement reaction Methods 0.000 claims description 20
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 17
- 229910000077 silane Inorganic materials 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 14
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 13
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 12
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 9
- 230000035699 permeability Effects 0.000 claims description 9
- 239000011435 rock Substances 0.000 claims description 8
- 238000004088 simulation Methods 0.000 claims description 8
- 238000012986 modification Methods 0.000 claims description 7
- 229910052708 sodium Inorganic materials 0.000 claims description 7
- 239000011734 sodium Substances 0.000 claims description 7
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 claims description 7
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 claims description 6
- 238000013019 agitation Methods 0.000 claims description 6
- -1 hexadecyl trimethoxy silicon Alkane Chemical class 0.000 claims description 6
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 6
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 5
- 238000002474 experimental method Methods 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 239000011787 zinc oxide Substances 0.000 claims description 5
- 239000003153 chemical reaction reagent Substances 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000004048 modification Effects 0.000 claims description 4
- RSKGMYDENCAJEN-UHFFFAOYSA-N hexadecyl(trimethoxy)silane Chemical compound CCCCCCCCCCCCCCCC[Si](OC)(OC)OC RSKGMYDENCAJEN-UHFFFAOYSA-N 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 claims 1
- MZSDGDXXBZSFTG-UHFFFAOYSA-M sodium;benzenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C1=CC=CC=C1 MZSDGDXXBZSFTG-UHFFFAOYSA-M 0.000 claims 1
- 238000002156 mixing Methods 0.000 abstract description 4
- 229920001223 polyethylene glycol Polymers 0.000 abstract description 4
- 239000002202 Polyethylene glycol Substances 0.000 abstract 3
- 239000006087 Silane Coupling Agent Substances 0.000 abstract 2
- 238000009835 boiling Methods 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 2
- 238000001132 ultrasonic dispersion Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 13
- 239000002585 base Substances 0.000 description 10
- 229920000642 polymer Polymers 0.000 description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- 230000001965 increasing effect Effects 0.000 description 6
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 239000011148 porous material Substances 0.000 description 6
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 5
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 5
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 5
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 5
- 239000005642 Oleic acid Substances 0.000 description 5
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 5
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 5
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 5
- 229920001030 Polyethylene Glycol 4000 Polymers 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 229910052681 coesite Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001239 high-resolution electron microscopy Methods 0.000 description 2
- ARYZCSRUUPFYMY-UHFFFAOYSA-N methoxysilane Chemical compound CO[SiH3] ARYZCSRUUPFYMY-UHFFFAOYSA-N 0.000 description 2
- 239000011943 nanocatalyst Substances 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 229920005591 polysilicon Polymers 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical class [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- PZJJKWKADRNWSW-UHFFFAOYSA-N trimethoxysilicon Chemical compound CO[Si](OC)OC PZJJKWKADRNWSW-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229940077388 benzenesulfonate Drugs 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000002144 chemical decomposition reaction Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002500 effect on skin Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 229960003511 macrogol Drugs 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000005543 nano-size silicon particle Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 238000003828 vacuum filtration Methods 0.000 description 1
- 230000010148 water-pollination Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- 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
-
- 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 invention discloses a preparation method of a nanofluid for improving oil recovery. The preparation method comprises the following steps: taking 2.0-4.0g of nanopowder, adding 60-80mL of deionized water to the nanopowder and carrying out ultrasonic dispersion at a room temperature for 30-60 minutes; dissolving 2.0g of a silane coupling agent in absolute ethyl alcohol; mixing the nano-base solution with the ethanol solution of the silane coupling agent in a three-neck boiling flask, heating while stirring to the range of 70 to 75 DEG C, reacting for 4-6 hours, filtering, washing by using an anhydrous solvent a plurality of times, and drying in a vacuum drying box at 60-70 DEG C for 12 hours to obtain modified nanoparticles; putting 0.1-0.5g of nanoparticles in the three-neck boiling flask, adding 200-300mL of water, heating to the range of 60-75 DEG C by use of a water bath, mixing a surfactant with PEG (Poly Ethylene Glycol), adding 100mL of mixed solution of the surfactant and the PEG, mechanically stirring for 6-8 hours, washing the stirred dispersion 2-3 times, adjusting the pH value to the range of 8-9, and adding deionized water to 1L, thereby obtaining the water-based nanofluid.
Description
Technical field
The present invention relates to petrochemical industry, more particularly to a kind of nano-fluid is used for improving oil recovery factor method.
Background technology
In the world in many oil reservoirs, about 2/3rds oil can not be exploited by conventional production process.Therefore, in maturated oil
Tanaka, improves recovery efficiency technique（EOR）There are very big potentiality.It is relatively economical that water drive improves recovery ratio method, but is leading
Will be in initial stage of production, improving water drive in recovery ratio method is relatively reasonable selection.After water drive produces time water drive, can select to add
Plus some chemical agents, to increase the efficiency of water drive process as alkali, surfactant and polymer.These chemical substances are added to
In injection water, the wetability of rock surface is changed into more hydrophilic state.The injection of polymer can increase the viscosity of injection water, improves non-
Homogeneous and the sweep efficiency of viscosity oil reservoir.Surfactant mainly has for reducing interfacial tension, so that because of capillary force bundle
Tie up the oil flowing acting in matrix pores.
In oil reservoir, the main difficulty using polymer is chemical degradation and the thermal degradation of polymer.Additionally, typical polymerization
Thing molecular weight is difficult to be injected in low-permeability oil deposit for 1000 ~ 25,000,000 polymer.In addition, high temperature and high salt make surfactant
Oil displacement process is challenging, can cause damage to surfactant oil displacement efficiency and form blocking, and the addition of alkali leads to mining site to try
Occur in testing that oil recovery well shaft fouling is serious, Produced Liquid difficult treatment the problems such as.Additionally, traditional surfactant is to hydrolysis
More sensitive.Therefore, it is necessary to exploitation heatproof, salt tolerant can have the new material of economic benefit in reservoir.
Nanometer technology can act on more efficient, less expensive, more environmentally friendly raising oil recovery（EOR）Method.Conventional
The diameter of reservoir pore is typically all in micron order；Therefore, nano particle can flow wherein.Additionally, the one of nano particle
Key property is skin effect, reduces with particle diameter, the surface area of particulate drastically becomes big, when the particle diameter of nanoparticle reaches 10nm
When, specific surface area is 90m2/ g, when particle diameter is 5nm, specific surface area is 180 m2/ g, when particle diameter drops to 2nm, specific surface area is violent
Increase to 450 m2/g.Very big specific surface area causes surface atom number to increase sharply, and accounts for quite big positioned at the atom of particle surface
Ratio, key state severe mismatch, cause the surface energy that Atomic coordinate is not enough and high, many activated centres occur, surface step and
Roughness increases, and chemical non-equilibrium, chemical valence, this chemical property leading to nanometer system and the change of non-integer coordination in surface
Learn equilibrium system and very big difference occurs.
Nano particle is larger due to surface area and volume ratio ratio, thus increased the energy on surface.On a solid surface
The suction-operated of active material can change the wetability of surface energy and system.Thus greatly reducing oil water interfacial tension,
So that injection fluid, in hole displacement process, makes crude oil be easy to peel off into little oil droplet, and driven liquid displacement is out.Additionally,
To reservoir, little duct has temporary occlusion to act on to nano-fluid particle, thus expanding swept volume, makes not fed through in hole
Mother oil displacement out, reached raising recovery ratio, the purpose of increasing injection, therefore, carry out nano-fluid improve oil recovering
Rate research work produces to oil field has direct production meaning, particularly some low permeability oil fields is more of practical significance.
There is scholar to develop a kind of metal (W, Ni, and Mo) nano-colloid particle-catalytic agent being dispersed in water to be dripped
Blue or green exploitation.Nanocatalyst and the asphalt viscosity no under nano particle effect is had to carry out comparing result and show, nanocatalyst pair
The viscosity reducing pitch is effective.Ponnapati et al. is found that water-soluble silica-zirconia ethylene type nanometer is gathered
Compound.Although these nano-complexes do not produce high viscosity in the concentration determining, author thinks the polymer of higher molecular weight
Higher grafting density can improve viscosity.
Ju et al. carries out the adsorption test of lipophobia and hydrophilic polysilicon nanometer particle to verify the wet of sandstone surface
Lubricant nature changes.Observe hydrophily nano silicon particles and can improve oil recovering compared with pure water in size range 10-500 nm
Rate about 9%, it is effective that polysilicon nanometer particle improves recovery efficiency technique to water drive.
Hendraningrat et al. research uses hydrophilic silicon oxides nano-particle, to the shadow improving oil recovery factor
Sound, the size including nano-particle and concentration, initial wetability and the isoparametric impact of temperature.Result shows, by carrying
High-temperature, reduces nanoparticle size and reduction nano-fluid injection rate can improve oil recovery factor.Additionally, also achieving rock
Stone, from middle wetting state, obtains highest oil recovery factor and oil displacement efficiency.And find oil recovery factor and nanometer stream
Bulk concentration is not directly proportional, that is, enhancing of recovering the oil when nano-fluid concentration increases, but when concentration is less than a critical value, adopts
Yield can reduce.
Karimi et al. passes through the experimental study shadow of the wettability modification to carbonate reservoir for the zirconia nanopowder fluid
Ring.Test result indicate that, nano-fluid can wet to become strong water wet from oily by force by the wetability of rock.
Giraldo et al. studying alumina nano-fluid is changing the wetability of Sandstone Cores and the wetability of induction oleophylic
Validity.Research shows, the wetability that nano-fluid can change Sandstone Cores makes rock wet to be changed into water wet from oil.
Content of the invention
For the deficiencies in the prior art, the present invention adopts the following technical scheme that：
A kind of preparation method of the nano-fluid for improving oil recovery factor, comprises the steps：
1）Preparation nanometer base fluid：Take the nano-powder of 2.0-4.0g, add deionized water 60-80 mL, room temperature ultrasonic disperse
30-60min；
2）Separately take silane coupler 2.0g dissolving absolute ethyl alcohol 30-60mL；
3）Modified Nano particle：Nanometer base fluid is put in there-necked flask with silane coupler ethanol solution and mixes, while stirring
Mix side and be heated to 70-75 DEG C, after reaction 4-6h, filtration anhydrous solvent washs for several times, is placed on 60-70 DEG C of vacuum drying chamber
In 12h is dried after, obtain modification nano-particle；
4）Water-based nano-fluid：0.1-0.5g nano-particle is taken to put into there-necked flask, add water 200-300mL, warming-in-water
To 60-75 DEG C, surfactant is mixed with PEG, and add its mixed solution 100mL, mechanical agitation 6-8h, after stirring
Dispersion liquid carries out washing 2-3 time, then pH value is adjusted to 8-9, and adds deionized water to 1L, obtains water-based nano-fluid.
Described nano-powder is：Nano-TiO2, zinc oxide, nanometer Fe3O4, Nano-meter SiO_22At least one in powder.
Described silane coupler is selected：Silane coupling reagent KH-570, silane coupler KH-56 or cetyl trimethoxy
Base silane.
Specifically, described prepare nano-TiO2Using Silane coupling reagent KH-570 (γ-methacryloxypropyl three
Methoxy silane)；Prepare nano zine oxide nano-fluid and adopt silane coupler KH-560 (γ-glycidol ether propoxyl group three
Methoxy silane)；Preparation nanometer Fe3O4Using silane coupler KH-560 (γ-glycidol ether propoxyl group trimethoxy silicon
Alkane)；Prepare Nano-meter SiO_22Fluid adopts hexadecyl trimethoxy silane.
Described anhydrous solvent is：Absolute ethyl alcohol or anhydrous n-hexane.
Described surfactant is：Neopelex, oleic acid are received or sodium alklyarylsulfonate.
Specifically, described prepare nano-TiO2Using surfactant neopelex；Prepare nano zine oxide to receive
Meter Liu Ti is received for oleic acid using surfactant；Preparation nanometer Fe3O4Nano-fluid is received for oleic acid using surfactant；Prepare Nano-meter SiO_22
It is sodium alklyarylsulfonate that nano-fluid adopts surfactant.
A kind of using method of the nano-fluid for improving oil recovery factor, the nano-fluid of preparation in length is
8.2-9.5cm, a diameter of 2.5cm, permeability is 1.42-1.51 μm2Artificial core on to carry out the indoor physical simulation displacement of reservoir oil real
Test；
Rock core is put in clamper, vacuumizes 6 hours, saturation simulation stratum water, measure rock core saturation degree and permeability；
Oily expelling water, measures initial oil saturation；Constant temperature 12h under thermostatic drying chamber setting temperature 45 C, carries out water drive oil first to containing
Water 92-93%, recording water drive oil displacement efficiency is 41.5-42.8%, then the nano-fluid of metaideophone 0.3pV, then sequent water flooding outlet
Moisture content is 98-100%, and the oil displacement efficiency recording nano-fluid improves 13.5-16.8% than water drive water drive oil displacement efficiency.
Technical scheme is directed in prior art has high temperature and high salt containing surfactant, the oil displacement agent of polymer
Under the conditions of oil displacement efficiency poor, the deficiency of concentration is high and alkali brings to stratum and oil well corrosion and incrustation injury etc., lead to
The technical scheme crossing present invention offer can obtain good dispersion, stable nano-fluid, the method process is simple, condition temperature
With, raw material availability height, low cost, be easy to industrialization.
Brief description
Fig. 1 is that the town particle size of catalyst surface is between 20-50nm through high resolution electron microscopy (HRTEM) detection
The TEM figure of water-base nano TiO2 fluid.
Specific embodiment
Below by specific embodiment, the present invention is described in detail.
Embodiment 1
Take the nano-TiO of 2.0g2Powder, adds deionized water 60 mL, room temperature ultrasonic disperse 30min, separately takes silane coupled
Agent KH-570 (γ-methacryloxypropyl trimethoxy silane) 2.0g dissolves absolute ethyl alcohol 40mL, by nano-TiO2Base
Liquid is mixed with silane coupler KH-560 ethanol solution, puts in there-necked flask, is heated to 70 DEG C of temperature while stirring, filters and uses
Absolute ethanol washing for several times, is placed on after being dried in 60 DEG C of vacuum drying chambers, obtains the TiO of modification2Nano-particle.
Take 0.5g TiO2Nano-particle puts into there-necked flask, and add water 300mL, warming-in-water to 70 DEG C, adds 2g 12
Sodium alkyl benzene sulfonate and 2g PEG-4000 mixed solution 100mL, mechanical agitation 8h, the dispersion liquid after stirring is carried out washing three
Secondary, then by pH value regulation to 8, and add deionized water to 1L, obtain TiO2Water-based nano-fluid.
Fig. 1 is water-base nano TiO2The TEM figure of fluid, as seen from Figure 1, nano-TiO2Particle so intensive state according to
Single particle so can be kept not reunite, illustrate that the nano-particle prepared can reach the purpose do not reunited.
Embodiment 2
Take the nanometer Zinc oxide powder of 2.0g, add deionized water 80 mL, room temperature ultrasonic disperse 60min, separately take silane even
Connection agent KH-560 (γ-glycidol ether propoxyl group trimethoxy silane) 2.0g dissolving absolute ethyl alcohol 30mL, by nano zine oxide
Base fluid is mixed with silane coupler KH-560 ethanol solution, puts in there-necked flask, while stirring, while be heated to 70 DEG C of temperature, instead
After answering 4h, filtration absolute ethanol washing for several times, is placed on after being dried in 60 DEG C of vacuum drying chambers, obtains the zinc oxide of modification
Nano-particle.
0.5g Zinc oxide nanoparticle is taken to put into there-necked flask, plus deionized water 200mL, warming-in-water to 70 DEG C, add
1g oleic acid is received and 1g PEG-4000 mixed solution 100mL, mechanical agitation 8 h, and the dispersion liquid after stirring is carried out washing three
Secondary, then by pH value regulation to 8, and add deionized water to 1L, obtain zinc oxide water-based nano-fluid.
Embodiment 3
Take nanometer Fe3O4Powder 4g, adds deionized water 80 mL, room temperature ultrasonic disperse 40min, separately takes silane coupler
KH-560 (γ-glycidol ether propoxyl group trimethoxy silane) 2g dissolves absolute ethyl alcohol 30mL, by nanometer Fe3O4Base fluid and silicon
Stirring in there-necked flask is put in the mixing of alkane coupling agent KH-560 ethanol solution, and after 70 DEG C of water-bath 8h, vacuum filtration obtains
Solid, puts in constant temperature blast drying oven and is dried 12 hours, obtains the Fe of modification3O4Particle.
Take 0.1g nanometer Fe3O4Particle puts into there-necked flask, and add water 300mL, warming-in-water to 60 DEG C, adds 1g oleic acid and receives
With 1g PEG-4000 (macrogol) mixed solution 100mL, mechanical agitation 6h, the dispersion liquid after stirring is carried out washing three
Secondary, then pH value is adjusted to 8, and add deionized water to 100mL, obtain Fe3O4Water-based nano-fluid.
Embodiment 4
Take the Nano-meter SiO_2 of 2.0g2Powder, adds deionized water 60 mL, room temperature ultrasonic disperse 30min, separately takes silane coupled
Agent (hexadecyl trimethoxy silane) 2.0g dissolves absolute ethyl alcohol 60mL, by Nano-meter SiO_22Base fluid and silane coupler (ten
Six alkyl trimethoxysilanes) ethanol solution mixing, put in there-necked flask, be heated to 75 DEG C of temperature while stirring, filter and use
Anhydrous n-hexane washs for several times, is placed on after being dried in 70 DEG C of vacuum drying chambers, obtains the SiO of modification2Nano-particle.
Take 0.5g SiO2Nano-particle puts into there-necked flask, and add water 300mL, warming-in-water to 75 DEG C, adds 2g alkyl virtue
Base sodium sulfonate and 2g PEG-4000 mixed solution 100mL, mechanical agitation 8h, the dispersion liquid after stirring is carried out washing 2 times, then
By pH value regulation to 9, and add deionized water to 1L, obtain SiO2Water-based nano-fluid.
Embodiment 5
By the nano-fluid of the increased substantially recovery ratio of synthesis in embodiment 1, it is 8.2cm in length, a diameter of
2.5cm, permeability is 1.42 μm2Artificial core on carry out indoor physical simulation oil displacement experiment.First water drive, to aqueous 93%, is surveyed
Obtain water drive and can improve oil recovery factor 42.6%, then the nano-fluid of metaideophone 0.3pV (pore volume), water drive to aqueous 98%, survey
Obtain and can improve oil recovery factor 16.8% on the basis of water drive again.
Embodiment 6
By the nano-fluid of the increased substantially recovery ratio of synthesis in embodiment 2, it is 8.6cm in length, a diameter of
2.5cm, permeability is 1.48 μm2Artificial core on carry out indoor physical simulation oil displacement experiment.First water drive, to aqueous 92%, is surveyed
Obtain water drive and can improve oil recovery factor 41.5%, then the nano-fluid of metaideophone 0.3pV (pore volume), water drive to aqueous 100%,
Record and can improve oil recovery factor 14.9% on the basis of water drive again.
Embodiment 7
By the nano-fluid of the increased substantially recovery ratio of synthesis in embodiment 3, it is 8.7cm in length, a diameter of
2.5cm, permeability is 1.51 μm2Artificial core on carry out indoor physical simulation oil displacement experiment.First water drive, to aqueous 93%, is surveyed
Obtain water drive and can improve oil recovery factor 41.5%, then the nano-fluid of metaideophone 0.3pV (pore volume), water drive to aqueous 98%, survey
Obtain and can improve oil recovery factor 14.3% on the basis of water drive again.
Embodiment 8
By the nano-fluid of the increased substantially recovery ratio of synthesis in embodiment 4, it is 9.5cm in length, a diameter of
2.5cm, permeability is 1.5 μm2Artificial core on carry out indoor physical simulation oil displacement experiment.First water drive, to aqueous 92%, is surveyed
Obtain water drive and can improve oil recovery factor 42.8 %, then the nano-fluid of metaideophone 0.3pV (pore volume), water drive to aqueous 98%,
Record and can improve oil recovery factor 13.5% on the basis of water drive again.
Claims (3)
1. a kind of preparation method of the nano-fluid for improving oil recovery factor it is characterised in that：Comprise the steps：
1）Preparation nanometer base fluid：Take the nano-powder of 2.0-4.0g, add deionized water 60-80 mL, room temperature ultrasonic disperse 30-
60min；
2）Separately take silane coupler 2.0g dissolving absolute ethyl alcohol 30-60mL；
3）Modified Nano particle：Nanometer base fluid is put in there-necked flask with silane coupler ethanol solution and mixes, while stirring
It is heated to 70-75 DEG C, after reaction 4-6h, filtration anhydrous solvent washs for several times, be placed in 60-70 DEG C of vacuum drying chamber dry
After dry 12h, obtain the nano-particle of modification；
4）Water-based nano-fluid：Take step（3）Modified nano-particle 0.1-0.5g puts into there-necked flask, and add water 200-300mL,
Warming-in-water to 60-75 DEG C, surfactant is mixed with PEG, and adds its mixed solution 100mL, mechanical agitation 6-8h, will
Dispersion liquid after stirring carries out washing 2-3 time, then pH value is adjusted to 8-9, and adds deionized water to 1L, obtains water base receiving
Meter Liu Ti；Described nano-powder is：Nano-TiO2, zinc oxide, nanometer Fe3O4, Nano-meter SiO_22At least one in powder；Institute
The silane coupler stated is selected：Silane coupling reagent KH-570, silane coupler KH-56 or hexadecyl trimethoxy silane；Institute
That states prepares nano-TiO2Using Silane coupling reagent KH-570；Prepare nano zine oxide nano-fluid and adopt silane coupler KH-
560 ；Preparation nanometer Fe3O4Using silane coupler KH-560；Prepare Nano-meter SiO_22Fluid adopts hexadecyl trimethoxy silicon
Alkane；Described anhydrous solvent is：Absolute ethyl alcohol or anhydrous n-hexane；Described surfactant is：Neopelex,
Enuatrol or sodium alklyarylsulfonate.
2. the preparation method of a kind of nano-fluid for improving oil recovery factor according to claim 1, its feature exists
In：Described prepares nano-TiO2Using surfactant sodium dodecyl base benzene sulfonic acid sodium salt；Prepare nano zine oxide nano-fluid to adopt
It is enuatrol with surfactant；Preparation nanometer Fe3O4It is enuatrol that nano-fluid adopts surfactant；Prepare Nano-meter SiO_22
It is sodium alklyarylsulfonate that nano-fluid adopts surfactant.
3. a kind of using method of the nano-fluid for improving oil recovery factor it is characterised in that：
By the nano-fluid of the claims 1 preparation method acquisition, its using method is：It is 8.2-9.5cm in length, directly
Footpath is 2.5cm, and permeability is 1.42-1.51 μm2Artificial core on carry out indoor physical simulation oil displacement experiment；
Rock core is put in clamper, vacuumizes 6 hours, saturation simulation stratum water, measure rock core saturation degree and permeability；Oil drives
Water, measures initial oil saturation；Constant temperature 12h under thermostatic drying chamber setting temperature 45 C, carries out water drive oil extremely aqueous 92- first
93%, recording water drive oil displacement efficiency is 41.5-42.8%, then the nano-fluid of metaideophone 0.3pV, then sequent water flooding outlet moisture content
For 98-100%, the oil displacement efficiency recording nano-fluid improves 13.5-16.8% than water drive water drive oil displacement efficiency.
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