CN115340857A - In-situ self-emulsifying nano oil displacement agent and preparation method and application thereof - Google Patents
In-situ self-emulsifying nano oil displacement agent and preparation method and application thereof Download PDFInfo
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- CN115340857A CN115340857A CN202211020979.XA CN202211020979A CN115340857A CN 115340857 A CN115340857 A CN 115340857A CN 202211020979 A CN202211020979 A CN 202211020979A CN 115340857 A CN115340857 A CN 115340857A
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- polyoxyethylene ether
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- 238000011065 in-situ storage Methods 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title claims abstract description 27
- 238000006073 displacement reaction Methods 0.000 title abstract description 30
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000002086 nanomaterial Substances 0.000 claims abstract description 25
- 239000003945 anionic surfactant Substances 0.000 claims abstract description 14
- 230000018044 dehydration Effects 0.000 claims abstract description 10
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 10
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 30
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 30
- 239000000178 monomer Substances 0.000 claims description 23
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 claims description 20
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 18
- 229960005190 phenylalanine Drugs 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 17
- COLNVLDHVKWLRT-QMMMGPOBSA-N L-phenylalanine Chemical compound OC(=O)[C@@H](N)CC1=CC=CC=C1 COLNVLDHVKWLRT-QMMMGPOBSA-N 0.000 claims description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 12
- 238000006116 polymerization reaction Methods 0.000 claims description 12
- 239000003999 initiator Substances 0.000 claims description 11
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 239000011203 carbon fibre reinforced carbon Substances 0.000 claims description 9
- 239000003054 catalyst Substances 0.000 claims description 9
- 229920006150 hyperbranched polyester Polymers 0.000 claims description 9
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 8
- 239000002202 Polyethylene glycol Substances 0.000 claims description 8
- 150000001412 amines Chemical class 0.000 claims description 8
- -1 cocoyl Chemical group 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- JOXIMZWYDAKGHI-UHFFFAOYSA-N p-toluenesulfonic acid Substances CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 claims description 8
- 229920001223 polyethylene glycol Polymers 0.000 claims description 8
- 238000006845 Michael addition reaction Methods 0.000 claims description 7
- 238000006482 condensation reaction Methods 0.000 claims description 7
- 238000005886 esterification reaction Methods 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 7
- 239000002250 absorbent Substances 0.000 claims description 6
- 230000002745 absorbent Effects 0.000 claims description 6
- IMUDHTPIFIBORV-UHFFFAOYSA-N aminoethylpiperazine Chemical group NCCN1CCNCC1 IMUDHTPIFIBORV-UHFFFAOYSA-N 0.000 claims description 6
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 6
- 125000001033 ether group Chemical group 0.000 claims description 6
- 229930195729 fatty acid Natural products 0.000 claims description 6
- 239000000194 fatty acid Substances 0.000 claims description 6
- 150000004665 fatty acids Chemical class 0.000 claims description 6
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 5
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 5
- 238000007334 copolymerization reaction Methods 0.000 claims description 5
- 125000004386 diacrylate group Chemical group 0.000 claims description 5
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 claims description 5
- 150000003254 radicals Chemical class 0.000 claims description 5
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims description 4
- NQGIJDNPUZEBRU-UHFFFAOYSA-N dodecanoyl chloride Chemical compound CCCCCCCCCCCC(Cl)=O NQGIJDNPUZEBRU-UHFFFAOYSA-N 0.000 claims description 4
- 150000002148 esters Chemical class 0.000 claims description 4
- 150000002576 ketones Chemical class 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- 125000001924 fatty-acyl group Chemical group 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- WTBAHSZERDXKKZ-UHFFFAOYSA-N octadecanoyl chloride Chemical compound CCCCCCCCCCCCCCCCCC(Cl)=O WTBAHSZERDXKKZ-UHFFFAOYSA-N 0.000 claims description 3
- FBWMYSQUTZRHAT-HZJYTTRNSA-N (9z,12z)-octadeca-9,12-dienoyl chloride Chemical compound CCCCC\C=C/C\C=C/CCCCCCCC(Cl)=O FBWMYSQUTZRHAT-HZJYTTRNSA-N 0.000 claims description 2
- MLQBTMWHIOYKKC-KTKRTIGZSA-N (z)-octadec-9-enoyl chloride Chemical compound CCCCCCCC\C=C/CCCCCCCC(Cl)=O MLQBTMWHIOYKKC-KTKRTIGZSA-N 0.000 claims description 2
- UNSAJINGUOTTRA-UHFFFAOYSA-N 3-(3-bromophenyl)prop-2-yn-1-ol Chemical compound OCC#CC1=CC=CC(Br)=C1 UNSAJINGUOTTRA-UHFFFAOYSA-N 0.000 claims description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 2
- 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 2
- 239000007864 aqueous solution Substances 0.000 claims description 2
- IPIVAXLHTVNRBS-UHFFFAOYSA-N decanoyl chloride Chemical compound CCCCCCCCCC(Cl)=O IPIVAXLHTVNRBS-UHFFFAOYSA-N 0.000 claims description 2
- STVZJERGLQHEKB-UHFFFAOYSA-N ethylene glycol dimethacrylate Chemical compound CC(=C)C(=O)OCCOC(=O)C(C)=C STVZJERGLQHEKB-UHFFFAOYSA-N 0.000 claims description 2
- 239000012467 final product Substances 0.000 claims description 2
- ARBOVOVUTSQWSS-UHFFFAOYSA-N hexadecanoyl chloride Chemical compound CCCCCCCCCCCCCCCC(Cl)=O ARBOVOVUTSQWSS-UHFFFAOYSA-N 0.000 claims description 2
- 229920000587 hyperbranched polymer Polymers 0.000 claims description 2
- 125000000400 lauroyl group Chemical group O=C([*])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 claims description 2
- 125000002669 linoleoyl group Chemical group O=C([*])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])/C([H])=C([H])\C([H])([H])/C([H])=C([H])\C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 2
- 239000011259 mixed solution Substances 0.000 claims description 2
- 125000001419 myristoyl group Chemical group O=C([*])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 claims description 2
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 2
- REEZZSHJLXOIHL-UHFFFAOYSA-N octanoyl chloride Chemical compound CCCCCCCC(Cl)=O REEZZSHJLXOIHL-UHFFFAOYSA-N 0.000 claims description 2
- 125000002811 oleoyl group Chemical group O=C([*])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])/C([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])[H] 0.000 claims description 2
- 125000005489 p-toluenesulfonic acid group Chemical group 0.000 claims description 2
- 230000020477 pH reduction Effects 0.000 claims description 2
- 125000001312 palmitoyl group Chemical group O=C([*])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 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- DAJSVUQLFFJUSX-UHFFFAOYSA-M sodium;dodecane-1-sulfonate Chemical compound [Na+].CCCCCCCCCCCCS([O-])(=O)=O DAJSVUQLFFJUSX-UHFFFAOYSA-M 0.000 claims description 2
- 125000003696 stearoyl group Chemical group O=C([*])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])C([H])([H])C([H])([H])[H] 0.000 claims description 2
- 238000004945 emulsification Methods 0.000 abstract description 21
- 230000000694 effects Effects 0.000 abstract description 13
- 230000008859 change Effects 0.000 abstract description 3
- 230000032683 aging Effects 0.000 abstract description 2
- 239000003995 emulsifying agent Substances 0.000 abstract description 2
- 238000001556 precipitation Methods 0.000 abstract description 2
- 150000003839 salts Chemical class 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 48
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 8
- 239000004094 surface-active agent Substances 0.000 description 8
- 239000008399 tap water Substances 0.000 description 8
- 235000020679 tap water Nutrition 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 7
- 239000000047 product Substances 0.000 description 6
- 229920000642 polymer Polymers 0.000 description 5
- 239000010779 crude oil Substances 0.000 description 4
- 230000001804 emulsifying effect Effects 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 239000012153 distilled water Substances 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 238000002329 infrared spectrum Methods 0.000 description 3
- 230000000977 initiatory effect Effects 0.000 description 3
- 230000002269 spontaneous effect Effects 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 239000011218 binary composite Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000007865 diluting Methods 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 239000013067 intermediate product Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 239000011206 ternary composite Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- QDGAVODICPCDMU-UHFFFAOYSA-N 2-amino-3-[3-[bis(2-chloroethyl)amino]phenyl]propanoic acid Chemical compound OC(=O)C(N)CC1=CC=CC(N(CCCl)CCCl)=C1 QDGAVODICPCDMU-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 238000004566 IR spectroscopy Methods 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- LXEKPEMOWBOYRF-UHFFFAOYSA-N [2-[(1-azaniumyl-1-imino-2-methylpropan-2-yl)diazenyl]-2-methylpropanimidoyl]azanium;dichloride Chemical compound Cl.Cl.NC(=N)C(C)(C)N=NC(C)(C)C(N)=N LXEKPEMOWBOYRF-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001555 benzenes Chemical class 0.000 description 1
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- CREMABGTGYGIQB-UHFFFAOYSA-N carbon carbon Chemical compound C.C CREMABGTGYGIQB-UHFFFAOYSA-N 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000012043 crude product Substances 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000011549 displacement method Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007046 ethoxylation reaction Methods 0.000 description 1
- 150000002190 fatty acyls Chemical group 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000004530 micro-emulsion Substances 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229940068918 polyethylene glycol 400 Drugs 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F299/00—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers
- C08F299/02—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates
- C08F299/022—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates from polycondensates with side or terminal unsaturations
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F299/00—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers
- C08F299/02—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates
- C08F299/022—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates from polycondensates with side or terminal unsaturations
- C08F299/024—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates from polycondensates with side or terminal unsaturations the unsaturation being in acrylic or methacrylic groups
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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
- C09K8/588—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 polymers
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
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- Chemical & Material Sciences (AREA)
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- Organic Chemistry (AREA)
- Nanotechnology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Geology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Medicinal Chemistry (AREA)
- Mining & Mineral Resources (AREA)
- Composite Materials (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The application discloses an in-situ self-emulsifying nano oil-displacing agent, and a preparation method and application thereof. The hyperbranched nano-material, the polymeric AOS and the anionic surfactant are included; wherein the mass fraction of the hyperbranched nano-material is 7-10 wt%; the mass fraction of the polymerized AOS is 20-30 wt%; the mass fraction of the anionic surfactant is 10-20 wt%; the balance of water. The in-situ emulsified nano oil displacement agent has low use concentration, good emulsification effect and interfacial tension reaching 10% ‑2 mN/m; wide temperature resistance range, good stability, no layering, no precipitation and good salt resistance, and can be suitable for the temperature range of 30-120 ℃; after aging for 8 hours at 120 ℃, the emulsification solubility increase rate and the interfacial tension change are not obvious, and the temperature resistance is good. The de-emulsifier is not needed, and the dehydration can be realized by standing, so that the good effects of emulsification at once and dehydration at once are realized.
Description
Technical Field
The application relates to an in-situ self-emulsifying nano oil-displacing agent, a preparation method and application thereof, belonging to the field of oil-displacing agents.
Background
Most oil fields at home and abroad are developed by water flooding, and many oil fields step into a high water cut period through long-term water flooding development, and have the characteristics of complex geological environment, dispersed oil reservoir, high recovery difficulty and the like. Especially for low permeability oil reservoirs, residual oil is adsorbed in a stratum structure and is difficult to extract; the thick oil reservoir has poor fluidity and large exploitation difficulty. In order to better start and collect residual oil, the spontaneous emulsification effect of the oil displacement system on crude oil needs to be enhanced, namely a small amount of in-situ emulsification oil displacement agent is used, under the action of natural shearing of stratum, the crude oil spontaneously generates emulsification effect with the oil displacement system to form emulsion, and the emulsion is produced along with the oil displacement system, so that the recovery ratio is improved.
At present, the common chemical flooding at home and abroad mainly comprises: (1) The surfactant flooding improves the microscopic oil washing efficiency by reducing the oil-water interfacial tension and changing the rock wettability; (2) Polymer flooding, namely increasing the viscosity of a water phase, controlling the fluidity ratio of an oil flooding system and playing a role in enlarging swept volume; (3) Selecting a proper oil displacement system according to stratum conditions by using a binary and ternary composite oil displacement agent: the method comprises surfactant active water flooding, micellar solution flooding and microemulsion flooding, polymer surfactant binary composite flooding, ternary composite flooding consisting of polymer surfactant alkali and the like.
Patent CN114015427A discloses a nano oil displacement agent and a preparation method thereof. Mixing water, glucose and hydrochloric acid uniformly in proportion under the condition of water bath, and adding the mixture into a high-temperature high-pressure reaction kettle for reaction to obtain a first intermediate product; and mixing the first intermediate product with a silane coupling agent and absolute ethyl alcohol, reacting under a water bath condition, and separating and drying to obtain the nano oil displacement agent. The application has wide oil deposit range on trial and can effectively improve the water injection development effect. However, hydrochloric acid is used in the reaction process, so that the volatility is high, the corrosivity is strong, the reaction is ultrahigh temperature and high pressure, the reaction time is long, and scalding and other hazards to experimenters are easily caused.
Patent CN113462375a discloses a chemical intervention in-situ emulsification system. The system can be simultaneously suitable for heavy oil reservoirs and thin oil reservoirs, does not need to add a demulsifier, and can realize rapid demulsification only by introducing N2. But requires additional insufflation aids, adding to cost.
Patent CN111594116 discloses an in-situ emulsification oil displacement method for a low-permeability oil reservoir. The method comprises the steps of injecting a preposed protective slug into a low-permeability oil reservoir, then injecting a slug of an in-situ emulsification oil displacement agent with strong emulsification capacity, weak emulsion stability and moderate low interfacial tension, and finally injecting an oil displacement agent with low flow resistance for displacement. The method can have good oil displacement effect on residual oil existing in a microscopic heterogeneous form after water flooding, but needs to prepare a plurality of groups of medicaments, and the whole process flow is complex and tedious.
Disclosure of Invention
Aiming at the problems that the existing surfactant flooding can reduce the oil-water interfacial tension and change the rock wettability, but is difficult to start the residual oil of a heavy oil reservoir; the polymer flooding polymer is greatly influenced by temperature and mineralization degree, has poor stabilizing effect and undesirable oil displacement effect, and is easy to cause pollution and blockage of a reservoir. The in-situ self-emulsifying nano oil displacement agent is developed based on self-researched and developed hyperbranched nano materials. In this application normal position is from emulsifying oil displacement agent can be under the low mechanical energy effect, and spontaneous and crude oil form emulsification system, has the low interfacial tension of surface activity oil displacement agent simultaneously, and the application temperature range is wide, and is salt-tolerant, and adds my independently research and development's hyperbranched nano-material and can increase emulsification solubility increase relatively, starts and gathers residual oil better. And the demulsifier is not needed to be added, and the natural settling dehydration rate can reach more than 80% only by standing for 30min, so that the emulsification can be realized by one touch, and the dehydration can be realized by one stop.
In order to achieve the above object, the present application provides a development method of an in-situ self-emulsifying nano oil-displacing agent, which is mainly synthesized by three steps, the first step: the hyperbranched nano-material is prepared by grafting and polymerizing functional groups after surface modification of a rigid inorganic nano-core, wherein the core can separate an oil layer, and a long chain can be inserted into the oil layer to play a role in emulsification and viscosity reduction; the second step is that: the polymerization AOS is prepared by dissolving and diluting solid AOS powder into tap water to a certain concentration, adding the solution into a three-neck flask, heating the solution to 60-90 ℃ or a certain temperature under the condition of introducing nitrogen, adding a catalyst, initiating AOS self-polymerization, and reacting for 4 hours to obtain the polymerization AOS; the third step: compounding the hyperbranched nano material and the anionic surfactant in the first step, diluting the mixture to a certain concentration by using tap water, adding the diluted mixture into the three-neck flask in the second step, and uniformly stirring the mixture at 80 ℃ under the protection of nitrogen to prepare the in-situ self-emulsifying nano oil displacement agent.
According to one aspect of the application, an in-situ self-emulsifying nano oil displacement agent is provided, which comprises a hyperbranched nano material, a polymeric AOS and an anionic surfactant;
wherein the mass fraction of the hyperbranched nano-material is 7-10 wt%;
the mass fraction of the polymerization AOS is 20-30 wt%;
the mass fraction of the anionic surfactant is 10-20 wt%;
the balance of water.
The hyperbranched nano-material has a structure shown in a formula I:
wherein R is fatty acyl;
a is the mass percent of an allyl polyoxyethylene ether structural unit, b is the mass percent of an N-fatty acyl-L-phenylalanine monoallyl polyoxyethylene ether ester structural unit, and c is the mass percent of a hyperbranched polyester amine structural unit with a carbon-carbon double bond as a terminal group;
a：b：c＝(0～50)：(100～50)：(0.1～1)，a+b+c＝100％；
n represents the number of ethoxy groups in a polyoxyethylene ether chain segment in the formula I, and n is more than or equal to 4 and less than or equal to 45;
alternatively, a: b: c = (20 to 50): (80-50): (0.4 to 0.8), a + b + c =100%;
optionally, n represents the number of ethoxy groups in the polyoxyethylene ether chain segment in the formula I, and n is more than or equal to 4 and less than or equal to 20;
alternatively, a is independently selected from any of 0%, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, or a range between any two.
Alternatively, b is independently selected from any of 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 100%, or a range between any two.
Alternatively, c is independently selected from any of 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, or a range of values between any two.
Optionally, n is independently selected from any of 4, 10, 15, 20, 25, 30, 35, 40, 45 or a range of values between any two.
In the application, the ratio of the mass percentage of the hyperbranched polyester amine structural unit with the end group of the carbon-carbon double bond in the structure shown in the formula I is 0.1-1. When the mass percentage of the hyperbranched polyesteramine structural unit with the end group of the carbon-carbon double bond is too low, the emulsifying property of the surfactant is difficult to improve, and the surfactant cannot have self-demulsification capability; when the mass percentage of the hyperbranched polyesteramine structural unit with the end group of the carbon-carbon double bond is too high, the emulsifying property of the surfactant can be improved, but the cost is high, and the industrial large-scale production is not facilitated.
Optionally, the hyperbranched polyester amine structural unit is obtained by adding a hyperbranched polyester amine double bond with a terminal group of a carbon-carbon double bond.
Optionally, the hyperbranched polyester amine has a structure represented by formula II:
wherein a1, a2 and b1 respectively represent the number of repetition of each structural unit in the hyperbranched polymer structure;
(a1+a2)：b1＝(2～2.5)：1，a1：a2＝(2～4)：1，2≤b≤30；
A. b, B' denotes the attachment point of a structural unit;
A-K-A has the structure shown in formulA III:
A-K' has the structure of formula IV:
wherein m represents the number of ethoxylations in the polyoxyethylene ether chain segment;
1≤m≤45；
R 1 selected from H or methyl;
optionally, the A is connected with the B or the A is connected with the B', so that five structural units are connected with each other to form a hyperbranched structure;
optionally, the fatty acyl group is selected from at least one of lauroyl, palmitoyl, stearoyl, myristoyl, cocoyl, oleoyl, linoleoyl, n-decanoyl, n-octanoyl.
The preparation method of the hyperbranched nano-material comprises the following steps:
(S1) adding A 2 Type monomer, BB' 2 Carrying out Michael addition reaction on the mixture of the type monomers to obtain hyperbranched polyesteramine with the terminal carbon-carbon double bond;
(S2) performing a Shoton-Bowman condensation reaction on a mixture containing L-phenylalanine, fatty acyl chloride, an absorbent and a solvent to obtain an intermediate;
(S3) carrying out esterification reaction on a mixture containing the intermediate, allyl polyoxyethylene ether and a catalyst to obtain a polymerizable monomer;
(S4) carrying out free radical copolymerization on a mixed solution containing the hyperbranched polyesteramine, an initiator, the polymerizable monomer and the unreacted allyl polyoxyethylene ether in the step (S3) to obtain a final product;
in step (S1), A is 2 The type monomer is selected from at least one of polyethylene glycol diacrylate and polyethylene glycol dimethacrylate;
wherein, the molecular weight of the polyethylene glycol is 200-2000;
optionally, the BB' 2 The monomer is aminoethyl piperazine;
optionally, in step (S1), A 2 Type monomer and BB' 2 The molar ratio of the monomers is (2-2.5): 1;
alternatively, in step (S1), the michael addition reaction is carried out in an aqueous solution;
alternatively, in step (S1), the michael addition reaction conditions are as follows:
the temperature is 48 to 72 hours;
the temperature is 15-30 ℃;
in step (S2), the absorbent is NaOH;
optionally, in the step (S2), the fatty acid chloride is at least one selected from lauroyl chloride, palmitoyl chloride, stearoyl chloride, myristoyl chloride, cocoyl chloride, oleoyl chloride, linoleoyl chloride, n-decanoyl chloride, n-octanoyl chloride;
optionally, in the step (S2), the solvent is a mixture of water and ketones;
wherein, the volume ratio of the ketone to the water is (1-1.5): 1;
optionally, in step (S2), the molar ratio of the L-phenylalanine to the fatty acid chloride is (1 to 1.4): 1;
optionally, in step (S2), the molar ratio of the L-phenylalanine to the absorbent is 1: (2-2.2);
alternatively, in the step (S2), the conditions of the schottky-bowman condensation reaction are as follows:
the time is 3-6 h;
the temperature is 20-40 ℃;
optionally, the schottky-bowman condensation reaction is carried out to obtain N-fatty acyl-L-phenylalanine sodium, and the N-fatty acyl-L-phenylalanine is obtained through acidification;
in step (S3), the catalyst is p-toluenesulfonic acid;
optionally, in the step (S3), the relative molecular mass of the allyl polyoxyethylene ether is 350 to 2400;
optionally, in the step (S3), the amount of the catalyst is 0.2% to 2.0% by mass of the allyl polyoxyethylene ether;
optionally, in the step (S3), the mass ratio of the intermediate to the allyl polyoxyethylene ether is 1: (1-3);
alternatively, in step (S3), the esterification reaction conditions are as follows:
the time is 4 to 6 hours;
the temperature is 120-150 ℃;
alternatively, in step (S3), the esterification reaction is carried out under vacuum conditions;
in the step (S4), the initiator is at least one selected from the group consisting of potassium persulfate, ammonium persulfate, azobisisobutyramidine hydrochloride, azobisimidazolinylpropane dihydrochloride;
optionally, in the step (S4), the mass ratio of the polymerizable monomer, the unreacted allyl polyoxyethylene ether in the step (S3), and the hyperbranched polyester amine is (100 to 50): (0 to 50): (0.1-1);
optionally, in the step (S4), the mass of the initiator is 0.4% to 0.8% of the total mass of the raw materials;
the total mass of the raw materials refers to the sum of the mass of the polymerizable monomer, the unreacted allyl polyoxyethylene ether in the step (S3) and the hyperbranched polyesteramine;
alternatively, in step (S4), the conditions for the radical copolymerization are as follows:
the time is 3 to 6 hours;
the temperature is 60-90 ℃.
Specifically, the method comprises the following steps:
the method comprises the following steps: and (3) preparing hyperbranched polyester amine. The polyethylene glycol diacrylate and N-aminoethyl piperazine (the molar ratio of the polyethylene glycol diacrylate to the N-aminoethyl piperazine is 2:1-5:2) are subjected to Michael addition reaction in water at the temperature of 15-30 ℃ for 48-72 h to obtain the hyperbranched polyesteramine.
Step two: synthesis of N-fatty acyl-L-phenylalanine.
The preparation method comprises the following steps of (1) mixing L-phenylalanine with fatty acid chloride (L-phenylalanine: fatty acid chloride = 1:1-1.4, molar ratio), in a mixed solvent of acetone and water (acetone: water = 1:1-3:2, volume ratio), carrying out a Shoton-Bowman condensation reaction (reaction temperature is 20-40 ℃, reaction time is 3-6 h) by taking NaOH (L-phenylalanine: naOH = 1:2-1.
Step three: synthesizing N-fatty acyl-L-phenylalanine monoallyl polyoxyethylene ether ester.
N-fatty acyl-L-phenylalanine and allyl polyoxyethylene ether (N-fatty acyl-L-phenylalanine: allyl polyoxyethylene ether = 1:1-1:3, molar ratio), taking p-toluenesulfonic acid (0.2% -1.0%) as a catalyst, carrying out a melting reaction (120-150 ℃, 4-6 h) under a vacuum condition, carrying out an esterification reaction to obtain a crude product, adding distilled water for dilution, and filtering to remove unreacted N-fatty acyl-L-phenylalanine to obtain a product.
Step four: adding hyperbranched polyesteramine and an initiator (potassium persulfate, ammonium persulfate, AIBA and AIBI, 0.4-0.8%), and initiating free radical copolymerization of N-fatty acyl-L-phenylalanine monoallyl polyoxyethylene ether ester and unreacted allyl polyoxyethylene ether (60-90 ℃ and 3-6 hours) to obtain the product.
The molecular weight of the polymerized AOS is 20000 to 30000.
The preparation method of the polymeric AOS comprises the following steps:
mixing an AOS polymerization monomer with an initiator, and carrying out self-polymerization in a nitrogen environment to obtain the polymerization AOS;
the initiator is selected from at least one of potassium persulfate, ammonium persulfate, azobisisobutyronitrile, VA044 or V50;
optionally, the temperature of the self-polymerization is 60 to 90 ℃.
The anionic surfactant is at least one selected from sodium heavy alkylbenzene sulfonate (HABS), sodium dodecyl sulfonate and sodium dodecyl sulfate.
According to another aspect of the application, a preparation method of the in-situ self-emulsifying nano oil displacement agent is provided, and the preparation method comprises the following steps:
mixing raw materials containing a hyperbranched nano material, a polymeric AOS, an anionic surfactant and water, and stirring in a nitrogen atmosphere to obtain the in-situ self-emulsifying nano oil-displacing agent.
Optionally, the hyperbranched nanomaterial, the anionic surfactant, and water are mixed first, and then mixed with the polymeric AOS.
The stirring temperature is 60-90 ℃;
the stirring time is 2-3 h;
the stirring speed is 300-600 r/min;
specifically, the stirring time and the stirring speed are related to the preparation amount, the more the preparation is, the higher the stirring speed is, mainly the stirring is uniform, and the yellowish transparent liquid is obtained.
According to another aspect of the application, an application of the in-situ self-emulsifying nano oil displacement agent or the in-situ self-emulsifying nano oil displacement agent prepared by the preparation method is provided, and the natural settling dehydration rate of the thick oil can reach 80% by standing for 30min without adding a demulsifier.
The application develops an in-situ emulsified nano oil-displacing agent based on the hyperbranched nano material, synthesized and polymerized AOS and compounded anionic surfactant. In this application normal position is from emulsifying nanometer oil-displacing agent can be under low mechanical energy effect, and spontaneous and crude oil form the emulsification system, has the low interfacial tension of surface activity oil-displacing agent simultaneously, and the use temperature range is wide, and is salt-tolerant, and adds my independently research and development's hyperbranched nano-material and can increase the emulsification rate of solubilization relatively, starts and gathers residual oil better. And the demulsifier is not needed to be added, and the natural settling dehydration rate can reach more than 80% only by standing for 30min, so that the emulsification can be realized by one touch, and the dehydration can be realized by one stop.
Compared with the prior art, the method has the following advantages:
(1) The in-situ emulsified nano oil displacement agent has low use concentration, can be diluted by 500 times, has good emulsification effect, and can reach the interface tension of 10 -2 mN/m; wide temperature resistance range, good stability, no layering, no precipitation and good salt resistance, and can be suitable for the temperature range of 30-120 ℃; after aging for 8h at 120 ℃, the emulsification rate and interfacial tension change are not obvious, and the temperature resistance is highThe performance is good.
(2) The hyperbranched nano-material used in the formula of the in-situ emulsified nano oil displacement agent is independently researched and developed by me, most other raw materials can be purchased from the market, and the price is economic. The in-situ emulsification oil displacement agent has the advantages of simple preparation method, low cost, energy conservation, environmental protection and easy mass production.
(3) The de-emulsifier is not needed, and the dehydration can be realized by standing, so that the good effects of emulsification at once and dehydration at once are realized.
Drawings
FIG. 1 is an infrared spectrum of preparation 1# prepared in preparation 1 of this application.
Detailed Description
The present application will be described in detail with reference to examples, but the present application is not limited to these examples.
Unless otherwise specified, the starting materials and catalysts in the examples of the present application were purchased commercially, wherein:
n-aminoethylpiperazine from Michael;
l-phenylalanine was purchased from Meclin;
lauroyl chloride was purchased from macelin;
allyl polyoxyethylene ether purchased from hei' an petrochemical;
stearoyl chloride was purchased from mcoline;
p-toluenesulfonic acid was purchased from mcelin.
Preparation example 1
The method comprises the following steps: 78.64g of polyethylene glycol 400 diacrylate and 10g of N-aminoethyl piperazine are weighed and reacted in water at 25 ℃ for 48 hours to obtain hyperbranched polyesteramine # 1.
Step two: weighing 16.5g of L-phenylalanine, 8.0g of NaOH,150ml of acetone and 150ml of water, uniformly mixing, weighing 21.8g of lauroyl chloride, dripping into the mixture, reacting at the temperature of 25 ℃ for 6 hours, distilling under reduced pressure to remove most of acetone and water after the reaction is finished to obtain concentrated solution, adding 300ml of distilled water for dilution, adding concentrated hydrochloric acid to adjust the pH value to 1, precipitating, filtering, washing with distilled water for 3 times, and drying in vacuum at 40 ℃ to obtain an intermediate 1#.
Step three: weighing 7g of intermediate No. 1, 20g of APEG-800,0.2g of p-toluenesulfonic acid, and reacting at 150 ℃ for 6h under vacuum condition to obtain 22.75g of polymerizable monomer No. 1 and 3.88g of unreacted APEG-800.
Step four: and adding 100ml of deionized water into the product obtained in the third step, adding 0.15g of hyperbranched polyesteramine # 1, uniformly mixing, initiating a reaction by 0.15g of potassium persulfate, and reacting at 80 ℃ for 3.5 hours to obtain a product # 1 of the preparation example, namely the hyperbranched nano-material.
Infrared spectroscopy was conducted on preparation example product No. 1.
Testing an instrument: model 50 infrared analyzer of Saimer Feishale Nicolet is
The infrared spectrum of the product No. 1 of the preparation example was measured, and it can be seen from FIG. 1 that 3355cm of the infrared spectrum -1 The positions represent the stretching vibration peaks of O-H bond, N-H bond and C-H bond of benzene ring, 1650cm -1 、 1550cm -1 And 1450cm -1 The position of the vibration peak indicates the stretching vibration peak of the benzene ring, 2850cm -1 Position represents-CH 2 Stretching vibration peak of bond, 1750cm -1 And 1225cm -1 Position indicates stretching vibration peak of-COO bond and C-O bond, 700cm -1 And 750cm -1 The position represents a mono-substituted structure of a benzene ring.
The synthesis is proved to be successful.
Example 1
Adding 30g of solid AOS powder into 70g of tap water, fully stirring and dissolving, transferring to a three-neck flask, introducing nitrogen, heating to 80 ℃, adding 0.3g of potassium persulfate, and reacting for 4 hours to prepare polymeric AOS; and (2) uniformly mixing 50g of sodium dodecyl sulfate, 37.5g of the hyperbranched nano material prepared in the preparation example 1 and 312.5g of tap water, adding the mixture into a three-neck flask, heating to 80 ℃ under the condition of introducing nitrogen gas for protection, and stirring for 2 hours to obtain the in-situ emulsified oil displacement agent.
Example 2
Adding 30g of solid AOS powder into 70g of tap water, fully stirring and dissolving, transferring to a three-neck flask, introducing nitrogen, heating to 80 ℃, adding 0.3g of potassium persulfate, and reacting for 4 hours to prepare polymeric AOS; and (3) uniformly mixing 37.5g of sodium dodecyl sulfate, 37.5g of the hyperbranched nano material prepared in the preparation example 1 and 325g of tap water, adding the mixture into a three-neck flask, heating to 80 ℃ under the condition of introducing nitrogen gas for protection, and stirring for 2 hours to obtain the in-situ emulsified oil displacement agent.
Example 3:
adding 30g of solid AOS powder into 70g of tap water, fully stirring and dissolving, transferring to a three-neck flask, introducing nitrogen, heating to 80 ℃, adding 0.3g of potassium persulfate, and reacting for 4 hours to prepare polymeric AOS; and (2) uniformly mixing 50g of sodium dodecyl sulfate, 50g of the hyperbranched nano material prepared in the preparation example 1 and 300g of tap water, adding the mixture into a three-neck flask, heating to 80 ℃ under the protection of nitrogen, and stirring for 2 hours to obtain the in-situ emulsified oil displacement agent.
Although the present invention has been described with reference to a few preferred embodiments, it should be understood that various changes and modifications can be made without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. An in-situ self-emulsifying nano oil-displacing agent is characterized in that,
the hyperbranched nano-material, the polymeric AOS and the anionic surfactant are included;
wherein the mass fraction of the hyperbranched nano-material is 7-10 wt%;
the mass fraction of the polymerized AOS is 20-30 wt%;
the mass fraction of the anionic surfactant is 10-20 wt%;
the balance of water;
the hyperbranched nano-material has a structure shown in a formula I:
wherein R is fatty acyl;
a is the mass percent of an allyl polyoxyethylene ether structural unit, b is the mass percent of an N-fatty acyl-L-phenylalanine monoallyl polyoxyethylene ether ester structural unit, and c is the mass percent of a hyperbranched polyesteramine structural unit of which the end group is a carbon-carbon double bond;
a：b：c＝(0～50)：(100～50)：(0.1～1)，a+b+c＝100％；
n represents the ethoxy number in the polyoxyethylene ether chain segment in the formula I, and n is more than or equal to 4 and less than or equal to 45.
2. The in-situ self-emulsifying nano oil-displacing agent according to claim 1,
a：b：c＝(20～50)：(80～50)：(0.4～0.8)，a+b+c＝100％；
preferably, n represents the number of ethoxy groups in the polyoxyethylene ether chain segment in the formula I, and n is more than or equal to 4 and less than or equal to 20;
preferably, the hyperbranched polyester amine has a structure represented by formula II:
wherein a1, a2 and b1 respectively represent the number of repetition of each structural unit in the hyperbranched polymer structure;
(a1+a2)：b1＝(2～2.5)：1，a1：a2＝(2～4)：1，2≤b≤30；
A. b, B' denotes the attachment point of a structural unit;
A-K-A has the structure shown in formulA III:
A-K' has the structure of formula IV:
wherein m represents the number of ethoxy groups in a polyoxyethylene ether chain segment;
1≤m≤45；
R 1 selected from H or methyl;
preferably, the A is connected with the B or the A is connected with the B', so that five structural units are connected with each other to form a hyperbranched structure;
preferably, the fatty acyl group is selected from at least one of lauroyl, palmitoyl, stearoyl, myristoyl, cocoyl, oleoyl, linoleoyl, n-decanoyl, n-octanoyl.
3. The in-situ self-emulsifying nano oil-displacing agent according to claim 2,
the preparation method of the hyperbranched nano-material comprises the following steps:
(S1) adding A 2 Type monomer, BB' 2 Obtaining hyperbranched polyesteramine with a carbon-carbon double bond at the tail end by Michael addition reaction of a mixture of type monomers;
(S2) performing a Shoton-Bowman condensation reaction on a mixture containing L-phenylalanine, fatty acyl chloride, an absorbent and a solvent to obtain an intermediate;
(S3) carrying out esterification reaction on a mixture containing the intermediate, allyl polyoxyethylene ether and a catalyst to obtain a polymerizable monomer;
(S4) carrying out free radical copolymerization on a mixed solution containing the hyperbranched polyesteramine, an initiator, the polymerizable monomer and the unreacted allyl polyoxyethylene ether in the step (S3) to obtain a final product;
in step (S1), A is 2 The type monomer is at least one of polyethylene glycol diacrylate and polyethylene glycol dimethacrylate;
wherein, the molecular weight of the polyethylene glycol is 200-2000;
preferably, the BB' 2 The monomer is aminoethyl piperazine;
preferably, in step (S1), A is 2 Type monomer and BB' 2 The molar ratio of the monomers is (2-2.5): 1;
preferably, in step (S1), the michael addition reaction is carried out in an aqueous solution;
preferably, in step (S1), the michael addition reaction conditions are as follows:
the temperature is 48 to 72 hours;
the temperature is 15-30 ℃;
in step (S2), the absorbent is NaOH;
preferably, in the step (S2), the fatty acid chloride is at least one selected from the group consisting of lauroyl chloride, palmitoyl chloride, stearoyl chloride, myristoyl chloride, cocoyl chloride, oleoyl chloride, linoleoyl chloride, n-decanoyl chloride, and n-octanoyl chloride;
preferably, in step (S2), the solvent is a mixture of water and ketones;
wherein, the volume ratio of the ketone to the water is (1-1.5): 1;
preferably, in the step (S2), the molar ratio of the L-phenylalanine to the fatty acid chloride is (1 to 1.4): 1;
preferably, in step (S2), the molar ratio of the L-phenylalanine to the absorbent is 1: (2-2.2);
preferably, in step (S2), the conditions of the schottky-bowman condensation reaction are as follows:
the time is 3 to 6 hours;
the temperature is 20-40 ℃;
preferably, the Xiaoton-Bowman condensation reaction is performed to obtain N-fatty acyl-L-phenylalanine sodium, and the N-fatty acyl-L-phenylalanine is obtained through acidification;
in step (S3), the catalyst is p-toluenesulfonic acid;
preferably, in the step (S3), the relative molecular mass of the allyl polyoxyethylene ether is 350 to 2400;
preferably, in the step (S3), the amount of the catalyst is 0.2-2.0% by mass of the allyl polyoxyethylene ether;
preferably, in the step (S3), the mass ratio of the intermediate to the allyl polyoxyethylene ether is 1: (1-3);
preferably, in step (S3), the esterification reaction conditions are as follows:
the time is 4-6 h;
the temperature is 120-150 ℃;
preferably, in step (S3), the esterification reaction is performed under vacuum conditions;
in the step (S4), the initiator is at least one selected from the group consisting of potassium persulfate, ammonium persulfate, azobisisobutyramidine hydrochloride, azobisimidazolinylpropane dihydrochloride;
preferably, in the step (S4), the mass ratio of the polymerizable monomer, the unreacted allyl polyoxyethylene ether in the step (S3), and the hyperbranched polyester amine is (100 to 50): (0 to 50): (0.1 to 1);
preferably, in the step (S4), the mass of the initiator is 0.4% to 0.8% of the total mass of the raw materials;
the total mass of the raw materials refers to the sum of the mass of the polymerizable monomer, the unreacted allyl polyoxyethylene ether in the step (S3) and the hyperbranched polyesteramine;
preferably, in step (S4), the conditions of the radical copolymerization are as follows:
the time is 3 to 6 hours;
the temperature is 60-90 ℃.
4. The in-situ self-emulsifying nano oil-displacing agent according to claim 1,
the molecular weight of the polymerized AOS is 20000 to 30000.
5. The in-situ self-emulsifying nano oil-displacing agent according to claim 4,
the preparation method of the polymeric AOS comprises the following steps:
mixing an AOS polymerization monomer with an initiator, and carrying out self-polymerization in a nitrogen environment to obtain the polymerization AOS;
the initiator is selected from at least one of potassium persulfate, ammonium persulfate, azobisisobutyronitrile, VA044 or V50;
preferably, the temperature of the self-polymerization is 60 to 90 ℃.
6. The in-situ self-emulsifying nano oil-displacing agent of claim 1,
the anionic surfactant is at least one selected from sodium heavy alkylbenzene sulfonate, sodium dodecyl sulfonate and sodium dodecyl sulfate.
7. The preparation method of the in-situ self-emulsifying nano oil-displacing agent according to any one of claims 1 to 6,
the method comprises the following steps:
mixing raw materials containing a hyperbranched nano material, a polymeric AOS, an anionic surfactant and water, and stirring in a nitrogen atmosphere to obtain the in-situ self-emulsifying nano oil-displacing agent.
8. The production method according to claim 7,
firstly, the hyperbranched nano-material, the anionic surfactant and water are mixed, and then the mixture is mixed with the polymeric AOS.
9. The production method according to claim 7,
the stirring temperature is 60-90 ℃;
the stirring time is 2-3 h.
10. The application of the in-situ self-emulsifying nano oil-displacing agent as defined in any one of claims 1 to 6 or the in-situ self-emulsifying nano oil-displacing agent prepared by the preparation method as defined in any one of claims 7 to 9,
under the condition of not adding a demulsifier, standing for 30min can enable the natural settling dehydration rate of the thickened oil to reach 80%.
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