CN107337762A - A kind of hydrophobic association cross-linked polymer microsphere, preparation method and application - Google Patents

A kind of hydrophobic association cross-linked polymer microsphere, preparation method and application Download PDF

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CN107337762A
CN107337762A CN201710697349.9A CN201710697349A CN107337762A CN 107337762 A CN107337762 A CN 107337762A CN 201710697349 A CN201710697349 A CN 201710697349A CN 107337762 A CN107337762 A CN 107337762A
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linked polymer
hydrophobic association
hydrophobic
polymer microsphere
parts
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CN107337762B (en
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荣敏杰
孙建波
许永升
于庆华
荣帅帅
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Shandong Nuoer Biological Technology Co Ltd
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Shandong Nuoer Biological Technology Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/52Amides or imides
    • C08F220/54Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
    • C08F220/56Acrylamide; Methacrylamide
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00Processes of polymerisation
    • C08F2/32Polymerisation in water-in-oil emulsions
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/50Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
    • C09K8/504Compositions based on water or polar solvents
    • C09K8/506Compositions based on water or polar solvents containing organic compounds
    • C09K8/508Compositions based on water or polar solvents containing organic compounds macromolecular compounds
    • C09K8/512Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60Compositions for stimulating production by acting on the underground formation
    • C09K8/84Compositions based on water or polar solvents
    • C09K8/86Compositions based on water or polar solvents containing organic compounds
    • C09K8/88Compositions based on water or polar solvents containing organic compounds macromolecular compounds
    • C09K8/887Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents

Abstract

The present invention relates to a kind of hydrophobic association cross-linked polymer microsphere, the hydrophobic association cross-linked polymer microsphere is obtained by acrylamide, sodium acetate, hydrophobic monomer, olefin sulfonic acid, cationic monomer and the inverted emulsion polymerization of crosslinking agent;One or more of the hydrophobic monomer in methyl methacrylate, styrene, vinyl trimethylsilane, N dodecylacrylamides, N n-butylphenyl acrylamides.Hydrophobic association cross-linked polymer microsphere provided by the invention has significant heat and salinity tolerance performance, space crosslink density is big, network structure is stable, and has preferable viscoplasticity, while can control the speed of expansion of hydrophobic association crosslinked microsphere to a certain extent, hydrophobic association crosslinked microsphere viscosity is low,, can be by oil field waste prepared and diluted, in the presence of pump with preferable stability, lower pressure can smoothly enter earth formation deep, and the stratum that matches is blocked after water-swellable.

Description

A kind of hydrophobic association cross-linked polymer microsphere, preparation method and application
Technical field
The present invention relates to the profile control and water plugging technology field of oil field oil reservoir, more particularly to a kind of hydrophobic association cross-linked polymer are micro- Ball, preparation method and application.
Background technology
Extensive problems faced when well water turns into crude oil extraction, these problems can largely effect on production and the effect in oil field Benefit, the oilfield exploitation that water drive is carried out is wherein impacted especially serious place.Often sent out during the waterflooding development in later stage Raw well water.So Water in Water Shutoff in Oil Field profile control problem is more and more severeer.At present, it is at most polyacrylamide aqueous amine that oil field, which uses, Solution carries out selective water plugging with cross-linking agents.The polyacrylamide profile control and water plugging technology used at present still has many offices It is sex-limited, it have impact on it and apply scale.It is primarily present following several respects problem:First, polyacrylamide is mostly pulvis, dispersing and dissolving Difficulty, site operation are inconvenient;Second, gelation time and gelling strength are difficult to control, often near wellbore zone is stifled adjusts effect good, and It is difficult to reach earth formation deep and plays a role;Third, the temperature tolerance of conventional polypropylene acid amides profile-controlling and plugging agent, salt tolerance are poor, intensity Low, the term of validity is short, is subject to certain restrictions in many applications.
Inverse emulsion polymerization is a kind of important technology for preparing polymer.It refers to the solution of water-soluble monomer in emulsifying agent In the presence of (generally nonionic emulsifier), it is scattered in oil phase (aliphatic hydrocarbon or aromatic hydrocarbon), is stirred vigorously down, forms breast Liquid, then trigger polymerization, obtain polymer.It is domestic by the preparation that inverse emulsion polymerization method is applied to oil field oil reservoir water shutoff agent A kind of emerging technology.Using inverse emulsion polymerization method prepare and can obtain relatively stable reaction rate, higher Polymer molecular weight.But there is also it is following the problem of:
(1) reversed-phase emulsion volume stability is poor, sensitiveer to temperature, mixing speed etc., easily occurs emulsifying not thorough Phenomenon, be layered.
(2) oligomer present in the easy encapsulation reaction system in polymer microballoon surface, cause polymer microballoon viscosity high, It is not easily accessible bottom deep or needs elevated pressures to enter earth formation deep.
(3) polymer microballoon space crosslink density is small, and network structure portion is unstable, poor flexibility, in water lower ground layer Block inefficient.
(4) polymer microballoon heat and salinity tolerance performance is poor, and the use on high mineralization stratum is restricted.
The content of the invention
(1) technical problems to be solved
The present invention is to solve existing when preparing oil field oil reservoir water shutoff agent using inverse emulsion polymerization method ask as follows Topic:Reversed-phase emulsion volume stability is poor, sensitiveer to temperature, mixing speed etc., easily occurs emulsifying halfway phenomenon, hair Oligomer present in layer estranged, the easy encapsulation reaction system in polymer microballoon surface, cause polymer microballoon viscosity high, be not easy Into bottom deep or small, the netted knot that needs elevated pressures to enter earth formation deep, polymer microballoon space crosslink density Structure portion is unstable, poor flexibility, and in water, lower ground layer closure inefficient, polymer microballoon heat and salinity tolerance performance are poor, in Gao Kuang The use for changing stratum is restricted.
(2) technical scheme
In order to solve the above-mentioned technical problem, the invention provides following technical scheme:
1st, a kind of hydrophobic association cross-linked polymer microsphere, the hydrophobic association cross-linked polymer microsphere is by acrylamide, vinegar Sour sodium, hydrophobic monomer, olefin sulfonic acid, cationic monomer and crosslinking agent is aggregated obtains;
The hydrophobic monomer is selected from methyl methacrylate, styrene, vinyl trimethylsilane, N- dodecyl propylene One or more in acid amides, N- n-butylphenyl acrylamides.
2nd, preferably, the acrylamide, the sodium acetate, the hydrophobic monomer, the olefin sulfonic acid, the cation The mass ratio of monomer and the crosslinking agent is (200-350):(15-25):(0.5-3):(5-15):(10-20):(0.2-1.5).
3rd, preferably, in parts by weight, the hydrophobic association cross-linked polymer microsphere be by 200-350 parts acrylamide, 15-25 parts sodium acetate, 0.5-3 parts hydrophobic monomer, 5-15 parts olefin sulfonic acid, 10-20 parts cationic monomer and the crosslinking of 0.2-1.5 parts Agent is mixed in 240-300 parts oil-based solvent and 290-430 part deionized waters, under the effect of 12-30 parts emulsifying agent, with 0.003- 1.5 parts of initiators trigger, and are prepared by inverse emulsion polymerization, and 25 parts of phase inversion agent octyl phenols are added in obtained light yellow emulsion APEO, hydrophobic association crosslinked microsphere is obtained after being sufficiently mixed.
4th, preferably, the emulsifying agent is compound emulsifying agent, and the compound emulsifying agent includes Tween 80, sorbester p17 and 12 Alcohol sodium maleate, and the compound emulsifying agent HLB value (Hydrophile-Lipophile Balance Number, i.e., it is hydrophilic Lipophilic balance value) it is 4.5~6.0.
5th, preferably, the preparation method of the lauryl alcohol sodium maleate includes:
Lauryl alcohol, maleic anhydride and organic solvent are mixed, under catalyst action, reacted under conditions of 80-85 DEG C, Obtain lauryl alcohol sodium maleate;
Preferably, the mol ratio of the lauryl alcohol and the maleic anhydride is 1:1;With
The catalyst is S2O8 2-/ZrO2-SiO2
6th, preferably, the initial particle of the hydrophobic association cross-linked polymer microsphere is 100-350nm.
7th, preferably, the olefin sulfonic acid is selected from 2- acrylamide-2-methyl propane sulfonics, vinyl sulfonic acid, pi-allyl sulphur One or more in acid, methacrylic sulfonic acid;
The cationic monomer is selected from MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, acrylyl oxy-ethyl-trimethyl chlorination One or more in ammonium, dimethyl diallyl ammonium chloride;And/or
The crosslinking agent is selected from N,N methylene bis acrylamide, N, N- DMAAs, the allyl of pentaerythrite three One or more in base ether.
8th, preferably, the initiator includes azodiisobutyronitrile, potassium peroxydisulfate and sodium hydrogensulfite;And/or
The oil-based solvent is in thiacyclohexane, hexane, heptane, octane, isooctane, white oil, gasoline, diesel oil, kerosene It is one or more.
9th, a kind of preparation method of hydrophobic association cross-linked polymer microsphere, the preparation method comprise the following steps:
By acrylamide, sodium acetate, hydrophobic monomer, olefin sulfonic acid, cationic monomer and crosslinking agent are mixed in water, regulation The pH of mixed solution is 6.8-7.0;
Oxidant, oil-based solvent and the emulsifying agent added in initiator, stirring, then letting nitrogen in and deoxidizing, then 16~18 The reducing agent added at DEG C in initiator triggers inverse emulsion polymerization, and phase inversion agent is added after the completion of reaction and obtains the hydrophobic association Cross-linked polymer microsphere;Wherein, polymerization temperature is controlled to be no more than 40 DEG C, polymerization time is 3~4h.
10th, application of the hydrophobic association cross-linked polymer microsphere in water shutoff agent.
(3) beneficial effect
The above-mentioned technical proposal of the present invention has the following advantages that:
Hydrophobic association cross-linked polymer microsphere provided by the invention has significant heat and salinity tolerance performance, space crosslink density Greatly, network structure is stable, and has preferable viscoplasticity, while can control the swollen of hydrophobic association crosslinked microsphere to a certain extent Swollen speed, hydrophobic association crosslinked microsphere viscosity is low, has preferable stability, can be by oil field waste prepared and diluted, in pump Under effect, lower pressure can smoothly enter earth formation deep, and the stratum that matches is blocked after water-swellable.
Brief description of the drawings
Fig. 1 is the cosmetic variation comparison diagram after hydrophobic association cross-linked polymer microsphere made from embodiment 1 is placed 3 months, Wherein, a shows the initial state of product, and b shows the apparent condition after placing 3 months;
Fig. 2 is the cosmetic variation comparison diagram after hydrophobic association cross-linked polymer microsphere made from comparative example 2 is placed 3 months, Wherein, a shows the initial state of product, and b shows the apparent condition after placing 3 months.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the embodiment of the present invention, to this hair Bright technical scheme is clearly and completely described.Obviously, described embodiment is the part of the embodiment of the present invention, and The embodiment being not all of.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work On the premise of the every other embodiment that is obtained, belong to the scope of protection of the invention.
The invention provides a kind of hydrophobic association cross-linked polymer microsphere, the hydrophobic association cross-linked polymer microsphere is by third Acrylamide, sodium acetate, hydrophobic monomer, olefin sulfonic acid, cationic monomer and crosslinking agent is aggregated obtains;
The hydrophobic monomer is selected from methyl methacrylate, styrene, vinyl trimethylsilane, N- dodecyl propylene One or more in acid amides, N- n-butylphenyl acrylamides.
Preferably, the hydrophobic monomer is N- dodecylacrylamides, and the chain alkyl of one end is introduced into microballoon space In network structure, microballoon elasticity is improved, and high conjugated structure possessed by the acrylamido of the other end improves microballoon space and handed over Connection degree.
In certain embodiments, the acrylamide, sodium acetate, the hydrophobic monomer, the olefin sulfonic acid, described The mass ratio of cationic monomer and the crosslinking agent is (200-350):(15-25):(0.5-3):(5-15):(10-20): (0.2-1.5)。
Preferably, in parts by weight, the hydrophobic association cross-linked polymer microsphere is by 200-350 parts acrylamide, 15- 25 parts of sodium acetates, 0.5-3 parts hydrophobic monomer, 5-15 parts olefin sulfonic acid, 10-20 parts cationic monomer and 0.2-1.5 part crosslinking agents It is mixed in 240-300 parts oil-based solvent and 290-430 part deionized waters, under the effect of 12-30 parts emulsifying agent, with 0.003-1.5 Part initiator triggers, and is prepared by inverse emulsion polymerization, and 25 parts of phase inversion agent octylphenol polyethylenes are added in obtained light yellow emulsion Oxygen vinethene, hydrophobic association crosslinked microsphere is obtained after being sufficiently mixed.
In certain embodiments, the emulsifying agent is compound emulsifying agent, and the compound emulsifying agent includes Tween 80, sorbester p17 With lauryl alcohol sodium maleate, and the HLB value of the compound emulsifying agent be 4.5~6.0.
The preparation method of the lauryl alcohol sodium maleate includes:
Lauryl alcohol, maleic anhydride and organic solvent are mixed, under catalyst action, reacted under conditions of 80-85 DEG C, Obtain lauryl alcohol sodium maleate;
Preferably, the mol ratio of the lauryl alcohol and the maleic anhydride is 1:1;With
The catalyst is S2O8 2-/ZrO2-SiO2
Lauryl alcohol sodium maleate used in the present invention is to synthesize monoesters by esterification by lauryl alcohol and maleic anhydride, so It is with obtained reactive emulsifier lauryl alcohol sodium maleate, its preparation method afterwards plus in alkali:It is 1 by mol ratio:1 lauryl alcohol and Maleic anhydride mixes, and adds organic solvent, is such as the petroleum ether of monomer mass 50%, four-hole boiling flask is added to after being sufficiently mixed In, condenser pipe, agitator, thermometer, by 0.8% catalyst S are filled on four-hole boiling flask2O8 2-/ZrO2-SiO2Add four-hole boiling flask In, reacted under conditions of 80-85 DEG C, obtain lauryl alcohol sodium maleate.
In order to improve purity, can after cooling, by the white precipitate crude product petroleum ether being collected into recrystallize 3 times, most It is 7 to be neutralized to pH value with sodium hydroxide solution afterwards, after heating, drying, produces the lauryl alcohol sodium maleate of high-purity.
The initial particle of hydrophobic association cross-linked polymer microsphere provided by the present invention is 100-350nm.
Olefin sulfonic acid used is selected from 2- acrylamide-2-methyl propane sulfonics, vinyl sulfonic acid, allyl sulphonic acid, methyl One or more in propene sulfonic acid;
Cationic monomer used is selected from MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, acrylyl oxy-ethyl-trimethyl chlorine Change the one or more in ammonium, dimethyl diallyl ammonium chloride;And/or
Crosslinking agent used is selected from N,N methylene bis acrylamide, N, N- DMAAs, pentaerythrite triolefin One or more in propyl ether.
Preferably, the initiator is composite initiator, includes azo-initiator and redox initiator;The idol Nitrogen class initiator is double (the 4- cyanogen of the NSC 18620 dihydrochloride of azo two, ABVN, azodiisobutyronitrile and 4,4 '-azo Base valeric acid) in one or more, preferably azodiisobutyronitrile;Redox initiator is preferably potassium peroxydisulfate and sulfurous acid Hydrogen sodium, wherein azo-initiator and potassium peroxydisulfate add in batch mixing, sodium hydrogensulfite in polymerization process several times Add.
The present invention oil-based solvent used in polymerization is selected from thiacyclohexane, hexane, heptane, octane, isooctane, white oil, vapour One or more in oil, diesel oil, kerosene.
Present invention also offers a kind of preparation method of hydrophobic association cross-linked polymer microsphere, the preparation method is included such as Lower step:
By acrylamide, sodium acetate, hydrophobic monomer, olefin sulfonic acid, cationic monomer and crosslinking agent are mixed in water, regulation The pH of mixed solution is 6.8-7.0;
Oxidant, oil-based solvent and the emulsifying agent added in initiator, stirring, then letting nitrogen in and deoxidizing, then 16~18 The reducing agent added at DEG C in initiator triggers inverse emulsion polymerization, and phase inversion agent is added after the completion of reaction and obtains the hydrophobic association Cross-linked polymer microsphere;
Preferably, polymerization temperature is controlled to be no more than 40 DEG C, polymerization time is 3~4h.
Application of the hydrophobic association cross-linked polymer microsphere provided by the invention in water shutoff agent.
Hydrophobic association cross-linked polymer disclosed by the invention is made using inverse emulsion polymerization, during inverse emulsion polymerization Caused heat smoothly can timely exclude reaction system, and reaction rate is relatively steady, it is hereby achieved that higher molecular weight Polymer, and system stability is preferable, can deposit for a long time.
Cation chain link is introduced in the present invention in main chain, not only makes polymer that there is anti-polyelectrolyte solution behavior, is increased The heat and salt resistance of strength polymer, and make polymer that there is preferable viscoplasticity, when the contraction-diverging hole for entering stratum When, show significant dilatant type feature.
Preparing raw material of the present invention carries out inverse emulsion polymerization, polymer is formed spacial framework, meanwhile, hydrophobic association Polymer can be formed poly- with three-dimensional space network structure by the association between hydrophobic grouping on polymer molecule side chain Adduct molecule aggregation, strengthen the spacial framework of hydrophobic association crosslinked microsphere, so as to control hydrophobic association crosslinked microsphere Speed of expansion.
Reactive emulsifier lauryl alcohol sodium maleate is introduced in the emulsion system of the present invention, the emulsifying agent does not only have surface Parents' group of activity, can also make emulsifying agent participate in reacting in the course of the polymerization process, micelle table is bonded in a manner of covalent bond Face, emulsifier molecules are made not degrade, hydrophobic association crosslinked microsphere is more stable under various conditions.
Hydrophobic association crosslinked microsphere disclosed by the invention has significant heat and salinity tolerance performance, the spacial framework of formation Crosslink density is big, and network structure is stable, and has preferable viscoplasticity, while hydrophobic association can be controlled to be crosslinked to a certain extent The speed of expansion of microballoon, hydrophobic association crosslinked microsphere viscosity is low, has preferable stability, can be prepared by oil field waste dilute Release, in the presence of pump, lower pressure can smoothly enter earth formation deep, and the stratum that matches is blocked after water-swellable.
It is several embodiments that the present invention enumerates below.
Embodiment 1
Parts by weight of raw materials is:Acrylamide 240, sodium acetate 17, N- dodecylacrylamides 1.5,2- acrylamides -2- Methyl propane sulfonic acid 7, dimethyl diallyl ammonium chloride 17, N, N- methylene-bisacrylamides 0.7, sodium hydroxide 1.3, deionization Water 385.5, white oil 275, Tween804, Span80 22.1, reactive emulsifier lauryl alcohol sodium maleate 3 (Tween80, 5.5) Span80 and the mixed HLB value of reactive emulsifier is, OPEO 25, azodiisobutyronitrile 0.3, mistake Potassium sulfate 0.02, sodium sulfite 0.3.
Preparation method is:Acrylamide, sodium acetate, N- dodecylacrylamides, 2- third are sequentially added in mixing kettle Acrylamide -2- methyl propane sulfonic acids, dimethyl diallyl ammonium chloride, N, N- methylene-bisacrylamides and water, it is sufficiently mixed PH value is adjusted to 6.8 with sodium hydroxide after even, is adding white oil, Tween80, Span80, reactive emulsifier and initiator High-speed stirred 2min, is transferred in reactor after azodiisobutyronitrile, potassium peroxydisulfate, leads to nitrogen deoxygenation 60min, is pumped at 16 DEG C Sodium sulfite triggers polymerization, and by refrigeration plant controlling reaction temperature, the polymerisation 4h at 34 DEG C is light yellow what is obtained OPEO is added in emulsion, hydrophobic association cross-linked polymer microsphere is obtained after being sufficiently mixed.
As shown in figure 1, the hydrophobic association cross-linked polymer microsphere of gained is faint yellow emulsion, system is uniform, not stratified. After placing 3 months, still so.
Embodiment 2
Parts by weight of raw materials is:Acrylamide 270, sodium acetate 22, styrene 1,2- acrylamide-2-methyl propane sulfonics 11, Dimethyl diallyl ammonium chloride 12, N, N- methylene-bisacrylamides 0.3, sodium hydroxide 2.1, deionized water 351.6, white oil 285, Tween80 2.7, Span80 15, reactive emulsifier lauryl alcohol sodium maleate 2 (Tween80, Span80 and reactivity 5.0) the mixed HLB value of emulsifying agent is, OPEO 25, azodiisobutyronitrile 0.3, potassium peroxydisulfate 0.02, sub- Sodium sulphate 0.3.
Preparation method is:Acrylamide, sodium acetate, styrene, 2- acrylamide -2- methyl are sequentially added in mixing kettle Propane sulfonic acid, dimethyl diallyl ammonium chloride, N, N- methylene-bisacrylamides and water, sodium hydroxide is used after being sufficiently mixed uniformly PH value is adjusted to 7.0, is adding white oil, Tween80, Span80, reactive emulsifier and initiator azodiisobutyronitrile, mistake High-speed stirred 2min after potassium sulfate, is transferred in reactor, leads to nitrogen deoxygenation 60min, and it is poly- that sodium sulfite initiation is pumped at 17 DEG C Close, and by refrigeration plant controlling reaction temperature, the polymerisation 3h at 40 DEG C, added in obtained light yellow emulsion pungent Base phenol polyethenoxy ether, hydrophobic association cross-linked polymer microsphere is obtained after being sufficiently mixed.
Embodiment 3
Parts by weight of raw materials is:Acrylamide 330, sodium acetate 19, methyl methacrylate 2,2- acrylamide -2- methyl-props Sulfonic acid 13, MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride 10, N, N- methylene-bisacrylamides 1, sodium hydroxide 2.5, go from Sub- water 292.5, white oil 279, Tween803.3, Span80 18.7, reactive emulsifier lauryl alcohol sodium maleate 4 (Tween80, 5.2) Span80 and the mixed HLB value of reactive emulsifier is, OPEO 25, azodiisobutyronitrile 0.3, mistake Potassium sulfate 0.02, sodium sulfite 0.3.
Preparation method is:Acrylamide, sodium acetate, methyl methacrylate, 2- acryloyls are sequentially added in mixing kettle Amine -2- methyl propane sulfonic acids, MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, N, N- methylene-bisacrylamides and water, it is fully mixed PH value is adjusted to 6.9 with sodium hydroxide after closing uniformly, is being added white oil, Tween80, Span80, reactive emulsifier and is being drawn High-speed stirred 2min after hair agent azodiisobutyronitrile, potassium peroxydisulfate, is transferred in reactor, leads to nitrogen deoxygenation 60min, at 18 DEG C It is pumped into sodium sulfite and triggers polymerization, and by refrigeration plant controlling reaction temperature, the polymerisation 4h at 38 DEG C is shallow what is obtained OPEO is added in yellow emulsion, hydrophobic association cross-linked polymer microsphere is obtained after being sufficiently mixed.
Embodiment 4
Parts by weight of raw materials is:Acrylamide 260, sodium acetate 19, N- dodecylacrylamides 2,2- acrylamide -2- first Base propane sulfonic acid 10, dimethyl diallyl ammonium chloride 17, N,N-DMAA 1, sodium hydroxide 1.9, deionized water 359.1, white oil 276, Tween80 3.1, Span80 21.5, reactive emulsifier lauryl alcohol sodium maleate 3.5 (Tween80, 5.6) Span80 and the mixed HLB value of reactive emulsifier is, OPEO 25, azodiisobutyronitrile 0.5, mistake Potassium sulfate 0.03, sodium sulfite 0.5.
Embodiment 5
Parts by weight of raw materials is:Acrylamide 285, sodium acetate 23, N- n-butylphenyls acrylamide 1.2,2- acrylamides- 2- methyl propane sulfonic acids 12, acrylyl oxy-ethyl-trimethyl salmiac 17, N, N- methylene-bisacrylamides 1.2, sodium hydroxide 2.3, deionized water 328.3, white oil 278, Tween80 2.9, Span80 20.1, reactive emulsifier lauryl alcohol sodium maleate 2.8 (Tween80, Span80 and the mixed HLB value of reactive emulsifier for 5.3), OPEO 25, azo two Isobutyronitrile 0.4, potassium peroxydisulfate 0.05, sodium sulfite 0.4.
Embodiment 6
Parts by weight of raw materials is:Acrylamide 200, sodium acetate 15, vinyl trimethylsilane 0.5,2- acrylamide -2- first Base propane sulfonic acid 5, acrylyl oxy-ethyl-trimethyl salmiac 15, N, N- methylene-bisacrylamides 0.2, sodium hydroxide 1, deionization Water 425, white oil 280, Tween801.5, Span80 7.5, reactive emulsifier lauryl alcohol sodium maleate 3 (Tween80, 5.9) Span80 and the mixed HLB value of reactive emulsifier is, OPEO 25, azodiisobutyronitrile 0.35, Potassium peroxydisulfate 0.02, sodium sulfite 0.3.
Embodiment 7
Parts by weight of raw materials is:Acrylamide 350, sodium acetate 20, styrene 3,2- acrylamide-2-methyl propane sulfonics 15, Acrylyl oxy-ethyl-trimethyl salmiac 20, pentaerythritol triallyl ether 1.5, sodium hydroxide 3, deionized water 290, white oil 277, Tween80 3, Span80 21, reactive emulsifier lauryl alcohol sodium maleate 4 (Tween80, Span80 and reactivity breast 6.0) the mixed HLB value of agent is, OPEO 30, azodiisobutyronitrile 0.5, potassium peroxydisulfate 0.05, sulfurous Sour sodium 0.5.
The preparation method of embodiment 4 to embodiment 7 is substantially the same with embodiment 1, and difference is shown in Table 1.
Comparative example 1
The preparation method of comparative example 1 is substantially the same with embodiment 1, and difference is:
Hydrophobic monomer differs with the embodiment of the present invention, using following monomer:
2,5- dimethyl-Isosorbide-5-Nitrae-two (1- methacryl amidos ethyl) benzene, this monomer synthesize in the following way:
Under nitrogen protection, by 10g sulfur trioxides, 9mL pyridines stir at room temperature, uniform dissolution is in filling 100mL ice In the glass reaction kettle of acetic acid, then be slowly added dropwise into the mixed solution into 12g methacrylonitriles, after be added dropwise to 28g2,5- bis- Methyl isophthalic acid, 4- divinylbenzenes, continuously stir and react 3.5 hours at 38 DEG C, import 350mL deionized waters, stir After stand, it is filtered, washing, dry, obtain 2,5- dimethyl-Isosorbide-5-Nitrae-two (1- methacryl amidos ethyl) benzene.
Comparative example 2
The preparation method of comparative example 2 is substantially the same with embodiment 1, and difference is:
Emulsifying agent used only includes Tween 80 and sorbester p17.
As shown in a figures in Fig. 2, the hydrophobic association cross-linked polymer microsphere of gained is faint yellow emulsion, and system is uniform, It is not stratified.But after placing 3 months, as shown in the b figures in Fig. 2, there is obvious layering in system.
Performance detection:
The emulsion microballoon in case study on implementation is tested by Shengli Oilfiedld Subsidiary Company Of China Petrochemical Corporation's company standard, surveyed Examination project includes testing emulsion microballoon initial particle with laser particle analyzer;With roller heating stove measure emulsion microballoon aging expansion times Number:Aging 7 days, 15 in the salt solution that 95 DEG C, total salinity are 45000mg/L (wherein divalent cation concentration is 6500mg/L) My god, particle diameter expansion multiple after 30 days;
Observe the cosmetic variation after microemulsion is placed 3 months.
Test result is shown in Table 2.
In a word, hydrophobic association cross-linked polymer microsphere provided by the invention has significant heat and salinity tolerance performance, formation Spacial framework crosslink density is big, and network structure is stable, and has preferable viscoplasticity, while can control to a certain extent The speed of expansion of hydrophobic association crosslinked microsphere, hydrophobic association crosslinked microsphere viscosity is low, has preferable stability, can be by oil field Waste water prepared and diluted, in the presence of pump, lower pressure can smoothly enter earth formation deep, be blocked matchingly after water-swellable Layer, suitable for Water in Water Shutoff in Oil Field profile control field.
Finally it should be noted that:The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations;Although The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that:It still may be used To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic; And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and Scope.

Claims (10)

1. a kind of hydrophobic association cross-linked polymer microsphere, it is characterised in that the hydrophobic association cross-linked polymer microsphere is by propylene Acid amides, sodium acetate, hydrophobic monomer, olefin sulfonic acid, cationic monomer and the inverted emulsion polymerization of crosslinking agent obtain;
The hydrophobic monomer is selected from methyl methacrylate, styrene, vinyl trimethylsilane, N- dodecyl acryloyls One or more in amine, N- n-butylphenyl acrylamides.
2. hydrophobic association cross-linked polymer microsphere according to claim 1, it is characterised in that the acrylamide, described Sodium acetate, the hydrophobic monomer, the olefin sulfonic acid, the mass ratio of the cationic monomer and the crosslinking agent are (200- 350):(15-25):(0.5-3):(5-15):(10-20):(0.2-1.5).
3. hydrophobic association cross-linked polymer microsphere according to claim 1, it is characterised in that in parts by weight, described to dredge Water association cross-linked polymer microsphere is by 200-350 parts acrylamide, 15-25 parts sodium acetate, 0.5-3 parts hydrophobic monomer, 5-15 Part olefin sulfonic acid, 10-20 parts cationic monomer and 0.2-1.5 part crosslinking agents are mixed in 240-300 parts oil-based solvent and 290-430 parts In deionized water, under the effect of 12-30 parts emulsifying agent, triggered with 0.003-1.5 parts initiator, prepared by inverse emulsion polymerization, 25 parts of phase inversion agent OPEOs are added in obtained light yellow emulsion, hydrophobic association friendship is obtained after being sufficiently mixed Join microballoon.
4. hydrophobic association cross-linked polymer microsphere according to claim 3, it is characterised in that the emulsifying agent is Composite Milk Agent, the compound emulsifying agent include Tween 80, sorbester p17 and lauryl alcohol sodium maleate, and the HLB value of the compound emulsifying agent For 4.5~6.0.
5. hydrophobic association cross-linked polymer microsphere according to claim 4, it is characterised in that the lauryl alcohol sodium maleate Preparation method include:
Lauryl alcohol, maleic anhydride and organic solvent are mixed, under catalyst action, reacts, obtains under conditions of 80-85 DEG C Lauryl alcohol sodium maleate;
Preferably, the mol ratio of the lauryl alcohol and the maleic anhydride is 1:1;With
The catalyst is S2O8 2-/ZrO2-SiO2
6. hydrophobic association cross-linked polymer microsphere according to claim 1, it is characterised in that the hydrophobic association crosslinking is poly- The initial particle of compound microballoon is 100-350nm.
7. hydrophobic association cross-linked polymer microsphere according to claim 1, it is characterised in that the olefin sulfonic acid is selected from 2- One or more in acrylamide-2-methyl propane sulfonic, vinyl sulfonic acid, allyl sulphonic acid, methacrylic sulfonic acid;
The cationic monomer be selected from MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, acrylyl oxy-ethyl-trimethyl salmiac, One or more in dimethyl diallyl ammonium chloride;And/or
The crosslinking agent is selected from N,N methylene bis acrylamide, N, N- DMAAs, pentaerythritol triallyl ether In one or more.
8. hydrophobic association cross-linked polymer microsphere according to claim 3, it is characterised in that the initiator includes azo Bis-isobutyronitrile, potassium peroxydisulfate and sodium hydrogensulfite;And/or
The one kind of the oil-based solvent in thiacyclohexane, hexane, heptane, octane, isooctane, white oil, gasoline, diesel oil, kerosene It is or a variety of.
9. the preparation method of any one of claim 1 to the 8 hydrophobic association cross-linked polymer microsphere, it is characterised in that described Preparation method comprises the following steps:
By acrylamide, sodium acetate, hydrophobic monomer, olefin sulfonic acid, cationic monomer and crosslinking agent are mixed in water, regulation mixing The pH of solution is 6.8-7.0;
Oxidant, oil-based solvent and the emulsifying agent added in initiator, stirring, then letting nitrogen in and deoxidizing, then at 16~18 DEG C The reducing agent added in initiator triggers inverse emulsion polymerization, and phase inversion agent is added after the completion of reaction and obtains the hydrophobic association crosslinking Polymer microballoon;
Wherein, polymerization temperature is controlled to be no more than 40 DEG C, polymerization time is 3~4h.
10. application of any one of claim 1 to the 9 hydrophobic association cross-linked polymer microsphere in water shutoff agent.
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