CN106046259A - Polymer oil-displacing agent based on fluorine-containing water-soluble hyperbranched multi-arm polyacrylamide polymer - Google Patents
Polymer oil-displacing agent based on fluorine-containing water-soluble hyperbranched multi-arm polyacrylamide polymer Download PDFInfo
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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
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- C08B37/0009—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid alpha-D-Glucans, e.g. polydextrose, alternan, glycogen; (alpha-1,4)(alpha-1,6)-D-Glucans; (alpha-1,3)(alpha-1,4)-D-Glucans, e.g. isolichenan or nigeran; (alpha-1,4)-D-Glucans; (alpha-1,3)-D-Glucans, e.g. pseudonigeran; Derivatives thereof
- C08B37/0012—Cyclodextrin [CD], e.g. cycle with 6 units (alpha), with 7 units (beta) and with 8 units (gamma), large-ring cyclodextrin or cycloamylose with 9 units or more; Derivatives thereof
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- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
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- 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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Abstract
The invention discloses a polymer oil-displacing agent based on a fluorine-containing water-soluble hyperbranched multi-arm polyacrylamide polymer. The structural formula of the fluorine-containing water-soluble hyperbranched multi-arm polyacrylamide polymer is as shown in the formula I, wherein a core A is poly-cyclodextrin with end groups containing hydroxyls; an arm B is a copolymer formed by acrylamide-sodium acrylate random copolymer chain segment, poly fluorine-containing hydrophobic chain segment and a poly zwitter-ion choline functional chain segment which are sequentially connected, and the other end of the acrylamide-sodium acrylate random copolymer chain segment is grafted to the core A. The fluorine-containing water-soluble hyperbranched multi-arm polyacrylamide polymer is simple in synthesis process and easy to amplify; free radical polymerization of an aqueous phase is environmentally friendly and free from pollution, products with series of molecular weight and structures can be obtained, the tackifying property and shearing resistance of the products are obviously superior to those of a conventional linear polyacrylamide polymer, and the polymer oil-displacing agent has the oilfield application prospect.
Description
Technical field
The present invention relates to a kind of polymer displacement of reservoir oil based on fluorine-containing water-soluble ultrabranching multi-arm polyacrylamide polymer
Agent, the most fluorine-containing water-soluble ultrabranching multi-arm polyacrylamide polymer, as the application of oil displacement agent, belongs to displacement of reservoir oil field, oil field.
Background technology
Polymer displacement of reservoir oil tech is one of technical way of oil field development raising oil recovery factor, has good increasing
Produce stable yields effect.The thickening property of polymer excellence can reduce water phase permeability and water-oil mobility ratio, expands sweep efficiency, reduces
Residual oil saturation, thus improve oil recovery factor.
Partially hydrolyzed polyacrylamide (PHPA) base polymer or its modified product are the polymer displacement of reservoir oil being most widely used at present
Agent.Although the extensive application of polymer, polymer spills the most cruelly in the defect of application process.Polymer is in preparation (stirring
Device), conveying (pump, pipeline, valve), inject (sleeve pipe borehole) and during flowing through pore media by strong mechanical shear
Cutting so that molecular chain rupture, molecular structure is destroyed, and molecular chain length reduces, thus causes polymer solution viscosity drastically
Reducing, oil displacement efficiency declines.It is the Main Means improving polymer anti-shear performance that polymer carries out structure and composition modification.
Summary of the invention
It is an object of the invention to provide a kind of based on fluorine-containing water-soluble ultrabranching multi-arm polyacrylamide polymer poly-
Compound oil displacement agent, the most fluorine-containing water-soluble ultrabranching multi-arm polyacrylamide polymer is as the application of oil displacement agent, and the present invention adopts
Fluorine-containing water-soluble ultrabranching multi-arm polyacrylamide polymer there is higher viscosity and stronger anti-shear performance.
The present invention fluorine-containing water-soluble ultrabranching multi-arm polyacrylamide polymer can be used for preparing the polymer flooding displacement of reservoir oil
Agent.
The structural formula of described fluorine-containing water-soluble ultrabranching multi-arm polyacrylamide polymer is as shown in formula I:
Wherein, core A is the cyclodextrin polymer of end group hydroxyl；
Arm B is by acrylic amide-acrylic sodium random copolymer segment, poly-fluorine-containing hydrophobic segment and poly-amphion choline
The copolymer that function segment is in turn connected to form, and another termination of described acrylic amide-acrylic sodium random copolymer segment
Branch is on described core A；
The cyclodextrin polymer of described end group hydroxyl is prepared according to the method comprised the steps:
In the basic conditions, cyclodextrin and epoxychloropropane carry out reacting and get final product；
Described cyclodextrin is beta-schardinger dextrin-.
The viscosity-average molecular weight of described fluorine-containing water-soluble ultrabranching multi-arm polyacrylamide polymer can be 3,500,000～1000
Ten thousand, such as 10,000,000；
The degree of hydrolysis of described fluorine-containing water-soluble ultrabranching multi-arm polyacrylamide polymer can be 20%～40%, as
27%；
Described core A, described acrylic amide-acrylic sodium random copolymer segment, described poly-fluorine-containing hydrophobic segment and described
The mass ratio of poly-amphion choline function segment can be 1:200～350:5～18:6～20, concretely 1:300:8.2～
8.3:7.2～12.4,1:300:8.3:7.2 or 1:300:8.2:12.4.
Described poly-fluorine-containing hydrophobic segment is obtained by the polymerization of fluorine-containing hydrophobic monomer；
Described fluorine-containing hydrophobic monomer can be hexafluorobutyl acrylate, Hexafluorobutyl mathacrylate, methacrylic acid 13
In fluorine monooctyl ester, dodecafluorhe-ptylacrylate, dodecafluoroheptyl methacrylate and trifluoroethyl methacrylate at least one；
Described poly-amphion choline function segment is obtained by the polymerization of amphion choline function monomer；
Described amphion choline function monomer can be for shown in methylacryloyl phosphocholine shown in formula II or formula III
Methacryl yl carboxylic acid choline:
In formula III, n is the number between 1～3.
Described cyclodextrin can be 1:0.2～0.3, concretely 1:0.24 with the mass ratio of described epoxychloropropane；
The temperature of described reaction can be 45～55 DEG C, and the time can be 5～8 hours, as reacted 6 hours at 50 DEG C；
Described alkalescence condition is transferred in row regulation and control by sodium hydrate aqueous solution, and the percent mass of described sodium hydrate aqueous solution contains
Amount is 0.5～2%.
When the present invention fluorine-containing water-soluble ultrabranching multi-arm polyacrylamide polymers is as polymer oil-displacing agent, compound concentration
Scope can be 1200～3000mg/L, such as 1750mg/L.
Described fluorine-containing water-soluble ultrabranching multi-arm polyacrylamide polymer can be by the method system comprised the following steps
Standby:
(1) under an inert atmosphere, the cyclodextrin polymer of described end group hydroxyl reacts with redox initiator, obtains
Reactant liquor 1；
(2) in described reactant liquor 1, acrylamide monomer, fluorine-containing hydrophobic monomer, amphion choline it are slowly added to successively
Class function monomer carries out graft copolymerization；
(3) in the reaction system of step (2), add sodium hydroxide to be hydrolyzed reaction, obtain described polymer.
In above-mentioned preparation method, in step (1), described redox initiator be selected from following at least one: nitric acid
Cerium ammonium, potassium peroxydisulfate, Ammonium persulfate., sodium peroxydisulfate and hydrogen peroxide；
Described redox initiator participates in reaction, in described aqueous solution, described oxidoreduction with the form of its aqueous solution
The mass percent concentration of initiator can be 0.5%～3%, concretely 0.5%；
Described redox initiator can be 1.5～3:1 with the mass ratio of the cyclodextrin polymer of described end group hydroxyl, specifically
Can be 2:1；
The temperature of described reaction can be 30～50 DEG C, and the time can be 30～60min, specifically can react under conditions of 40 DEG C
40min。
In above-mentioned preparation method, in step (2), described acrylamide monomer is with the form of acrylamide monomer aqueous solution
Adding, the mass percent concentration of described acrylamide monomer aqueous solution can be 20～30%, concretely 25%；
Described fluorine-containing hydrophobic monomer adds with the form of emulsion, and described emulsion uses sodium lauryl sulphate and water to enter
Row preparation, in described emulsion, the mass percent concentration of described fluorine-containing hydrophobic monomer can be 2～15%, concretely 5%；
Described amphion choline function monomer adds with the form of amphion choline function monomer aqueous solution, institute
The mass concentration stating amphion choline function monomer aqueous solution can be 2～15%, concretely 5%.
In above-mentioned preparation method, the cyclodextrin polymer of described end group hydroxyl, described acrylamide monomer, described fluorine-containing dredge
Aqueous monomer can be 1:220～420:9～25:7～23 with the mass ratio of described amphion choline function monomer successively, specifically
Can be 1:320:18:15；
The temperature of described graft copolymerization can be 45～75 DEG C, and the time can be 5～10h, as anti-under conditions of 55 DEG C
Answer 6h.
In above-mentioned preparation method, in step (3), the addition of described sodium hydroxide is the quality of acrylamide monomer
10%～20%, concretely 15%；
The temperature of described hydrolysis can be 90 DEG C～120 DEG C, and the time can be 1～3 hour, as little in carried out 3 at 120 DEG C
Time.
The present invention has a following beneficial aspects:
The present invention fluorine-containing water-soluble ultrabranching multi-arm polyacrylamide polymers synthesis technique is simply amplified, and aqueous phase is certainly
It is polymerized green non-pollution by base, the product of Series Molecules amount and structure can be obtained, and its thickening and shear resistant are significantly better than that often
Gage line polyacrylamide polymer, has field use prospect.
Accompanying drawing explanation
Fig. 1 is the thickening property figure of fluorine-containing water-soluble ultrabranching multi-arm polyacrylamide polymer prepared by the present invention.
Fig. 2 is the anti-shear performance of fluorine-containing water-soluble ultrabranching multi-arm polyacrylamide polymer prepared by the present invention
Figure.
Detailed description of the invention
Experimental technique used in following embodiment if no special instructions, is conventional method.
Material used in following embodiment, reagent etc., if no special instructions, the most commercially obtain.
HCD employed in following embodiment prepares as steps described below:
Add NaOH solution and the 15mL water of the 25wt% of 5.0g β-CD, 7.5mL, stir 1 hour, slowly drip
The epoxychloropropane of 1.0mL (1.18g), after dropping, at a temperature of 50 DEG C, 6h, system 100mL third are reacted in stirring energetically
Ketone precipitates, the white solid obtained, the water of crude product 100mL: it is unreacted that the mixed solution of ethanol=1:2 cleans removing repeatedly
CD and expoxy propane class monomer, last white solid vacuum drying obtains product HCD.
Acryloyl group phosphorylcholine-monomer employed in following embodiment is the product of medicine company limited of Sigma of the U.S.
Product, reagent abbreviation MPC, CAS accession number is 67881-98-5.
The product of the medicine company limited of Sigma of the acryloyl group carboxylic acid choline U.S. employed in following embodiment, reagent
Abbreviation CBMA, CAS accession number is 24249-95-4, wherein n=1.
Dodecafluoroheptyl methacrylate employed in following embodiment is for avenging good fluorine chemistry of silicones Products, and reagent contracts
Writing DFBMA, CAS registration number is 2261-99-6.
Embodiment 1, prepare fluorine-containing water-soluble ultrabranching multi-arm polyacrylamide polymer
By 25mg parent nucleus HCD, 95mL H2O is placed in there-necked flask, stirring and dissolving, is passed through nitrogen deoxygenation 45min, then
Add ammonium ceric nitrate aqueous solution (50mg ammonium ceric nitrate is dissolved in 10mL water) under nitrogen protection, stirring reaction 30min at 40 DEG C,
Acrylamide aqueous solution (8.0g acrylamide is dissolved in 24mL water), methacrylic acid 12 it is slowly added to successively in reactant liquor
(450mg dodecafluoroheptyl methacrylate monomer is emulsifiable in 8.6mL water fluorine heptyl ester monomer emulsion, and emulsifying agent is dodecane
Base sodium sulfonate 450mg), acryloyl group ethyoxyl phosphorylcholine-monomer aqueous solution (375mg acryloyl group ethyoxyl phosphocholine list
Body is dissolved in 7.1mL water), then it is warmed up to 55 DEG C and reacts 6 hours, in reactant liquor, add 1.2g NaOH, water at 120 DEG C
Solving 2 hours, dry, obtain 1# fluorine-containing water-soluble ultrabranching multiarm polymers, its viscosity-average molecular weight is about 10,000,000, degree of hydrolysis
It is 27%.
In 1# fluorine-containing water-soluble ultrabranching multiarm polymers prepared by the present embodiment, HCD, acrylic amide-acrylic sodium without
Rule copolymer segment, polymethylacrylic acid ten difluoro heptyl ester segment are 1 with the mass ratio of polypropylene acyl group phosphocholine segment:
300:8.3:7.2.
Embodiment 2, fluorine-containing water-soluble ultrabranching multi-arm polyacrylamide polymer
By 25mg parent nucleus HCD, 95mL H2O is placed in there-necked flask, stirring and dissolving, is passed through nitrogen deoxygenation 45min, then
Add ammonium ceric nitrate aqueous solution (50mg ammonium ceric nitrate is dissolved in 10mL water) under nitrogen protection, stirring reaction 30min at 40 DEG C,
Acrylamide aqueous solution (8.0g acrylamide is dissolved in 24mL water), methacrylic acid 12 it is slowly added to successively in reactant liquor
(450mg dodecafluoroheptyl methacrylate monomer is emulsifiable in 8.6mL water fluorine heptyl ester monomer emulsion, and emulsifying agent is dodecane
Base sodium sulfonate 450mg), (375mg acrylic acid carboxylic acid choline monomer is dissolved in 7.1mL water to acrylic acid carboxylic acid choline monomer solution
In), then it is warmed up to 55 DEG C of reaction 6h, in reactant liquor, adds 1.2g NaOH, hydrolyze 2 hours at 120 DEG C, dry, to obtain final product
2# fluorine-containing water-soluble ultrabranching multiarm polymers, its viscosity-average molecular weight is about 10,000,000, and degree of hydrolysis is 27%.
In 2# fluorine-containing water-soluble ultrabranching multiarm polymers prepared by the present embodiment, HCD, acrylic amide-acrylic sodium without
Rule copolymer segment, polymethylacrylic acid ten difluoro heptyl ester segment are 1:300 with the mass ratio of polyacrylic acid carboxylic acid choline segment:
8.2:12.4.
Embodiment 3, the performance test of fluorine-containing water-soluble ultrabranching multi-arm polyacrylamide polymer
The performance of 1# and the 2# fluorine-containing water-soluble ultrabranching multi-arm polyacrylamide polymer preparing the present invention is carried out
Evaluating, evaluation methodology and result are as follows, and wherein unaltered portion hydrolyzed polyacrylamide (i.e. " general polymer ") is industry
Changing product, marque is FP6050, and purchased from SNF company of France, its structure is linear straight chain type.
(1) thickening property: take a certain amount of polymer, under 45 DEG C of water bath condition, prepares variable concentrations with deionized water
Polymer solution, the relation of test polymer viscosity and concentration, evaluate the thickening property of polymer, result is as it is shown in figure 1, also
Contrast with unaltered portion hydrolyzed polyacrylamide performance.
As shown in Figure 1, along with the increase of concentration, the viscosity of 1# Yu 2# fluorine-containing water-soluble ultrabranching multiarm polymers aqueous solution
Dramatically increase, when concentration is 2000mg/L, 1# and 2# water-soluble ultrabranching aqueous polymer solution viscosity may be up to 113.6 and
129.3mPa s, far above the 65.8mPa s of unaltered portion hydrolyzed polyacrylamide.
(2) anti-shear performance: take the polymer solution that aimed concn is 1500mg/L, with the shearing of 1 grade of Rhein agitator
20s, measures its apparent viscosity before and after polymeric shear at different temperatures, calculates viscosity retention ratio, result as in figure 2 it is shown,
And contrast with unaltered portion hydrolyzed polyacrylamide.
As shown in Figure 2, in concentrated water, 1# with 2# fluorine-containing water-soluble ultrabranching multiarm polymers solution is clipped
After, viscosity retention ratio is maintained at about 58%, higher than about the 40% of unaltered portion hydrolyzed polyacrylamide.
(3) Oil Displacing Capacity: take the polymer solution that aimed concn is 1750mg/L, 20s sheared by one grade of Waring agitator
The most standby.Use for laboratory artificial core, perm-plug method is respectively 500,2000 and 4000mD from top to bottom.With oil field, the Bohai Sea
Compounding simulated oil with kerosene after comprehensive oil sample dehydration, 65 DEG C of viscosity are 70mPa s.First carry out water drive, aqueous when reaching more than 98%
Turn polymer flooding.Polymer and water drive velocity are 3m/d, and polymer solution injected slurry volume is 0.3PV.Test result indicate that, 1#
11 can be improved than unaltered portion hydrolyzed polyacrylamide with the oil-recovering rate of 2# fluorinated water dissolubility dissaving polymer solution
～13%.
In sum, the fluorine-containing water-soluble ultrabranching multiarm polymers that the present invention provides is demonstrated by being better than unaltered portion water
Solve the thickening of polyacrylamide, anti-salt, anti-shearing and Oil Displacing Capacity, can be applicable to polymer displacement of reservoir oil.
Claims (9)
- The most fluorine-containing water-soluble ultrabranching multi-arm polyacrylamide polymer is at polymer displacement of reservoir oil or as the application in oil displacement agent；The structural formula of described fluorine-containing water-soluble ultrabranching multi-arm polyacrylamide polymer is shown in formula I:Core A: ● arm B:Wherein, core A is the cyclodextrin polymer of end group hydroxyl；Arm B is by acrylic amide-acrylic sodium random copolymer segment, poly-fluorine-containing hydrophobic segment and poly-amphion choline function The copolymer that segment is in turn connected to form, and the other end of described acrylic amide-acrylic sodium random copolymer segment is grafted to On described core A.
- 2. a polymer oil-displacing agent, its active component is that shown in Formulas I, fluorine-containing water-soluble ultrabranching multi-arm polyacrylamide is birdsed of the same feather flock together Compound；Core A: ● arm B:Wherein, core A is the cyclodextrin polymer of end group hydroxyl；Arm B is by acrylic amide-acrylic sodium random copolymer segment, poly-fluorine-containing hydrophobic segment and poly-amphion choline function The copolymer that segment is in turn connected to form, and the other end of described acrylic amide-acrylic sodium random copolymer segment is grafted to On described core A.
- Polymer oil-displacing agent described in application the most according to claim 1 or claim 2, it is characterised in that: described contain The viscosity-average molecular weight of fluorine water-soluble ultrabranching multi-arm polyacrylamide polymer is 3,500,000～10,000,000；The degree of hydrolysis of described fluorine-containing water-soluble ultrabranching multi-arm polyacrylamide polymer is 20%～40%.
- 4. according to the application described in claim 1 or 3 or the polymer oil-displacing agent described in Claims 2 or 3, it is characterised in that: Described core A, described acrylic amide-acrylic sodium random copolymer segment, described poly-fluorine-containing hydrophobic segment and described poly-both sexes from The mass ratio of sub-choline function segment is 1:200～350:5～18:6～20.
- 5. according to the application described in claim 1 or 3 or 4 or the polymer oil-displacing agent described in Claims 2 or 3 or 4, its feature It is: described poly-fluorine-containing hydrophobic segment is obtained by the polymerization of fluorine-containing hydrophobic monomer；Described fluorine-containing hydrophobic monomer be hexafluorobutyl acrylate, Hexafluorobutyl mathacrylate, methacrylic acid ten trifluoro monooctyl ester, In dodecafluorhe-ptylacrylate, dodecafluoroheptyl methacrylate and trifluoroethyl methacrylate at least one.
- 6. according to the application described in claim 1 or 3 or 4 or 5 or the polymer oil-displacing agent described in Claims 2 or 3 or 4 or 5, It is characterized in that: described poly-amphion choline function segment is obtained by the polymerization of amphion choline function monomer；Described amphion choline function monomer is methyl-prop shown in methylacryloyl phosphocholine shown in formula II or formula III Enoyl-carboxylic acid choline:In formula III, n is the number between 1～3.
- 7. according to the application described in claim 1 or 3 or 4 or 5 or 6 or the polymer described in Claims 2 or 3 or 4 or 5 or 6 Oil displacement agent, it is characterised in that: the cyclodextrin polymer of described end group hydroxyl is prepared according to the method comprised the steps:In the basic conditions, cyclodextrin and epoxychloropropane carry out reacting and get final product；Described cyclodextrin is beta-schardinger dextrin-.
- Application the most according to claim 7 or polymer oil-displacing agent, it is characterised in that: described cyclodextrin and described epoxy chlorine The mass ratio of propane is 1:0.2～0.3；The temperature of described reaction is 45～55 DEG C, and the time is 5～8 hours.
- 9. according to the application described in claim 1 or 3 or 4 or 5 or 6 or 7 or 8, it is characterised in that: described fluorinated water dissolubility is overspend The concentration changing multi-arm polyacrylamide polymer is 1200～3000mg/L.
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| CN113667141A (en) * | 2021-07-09 | 2021-11-19 | 深圳华源再生医学有限公司 | Alginate hydrogel for resisting protein adhesion and preparation method and application thereof |
| CN113667141B (en) * | 2021-07-09 | 2023-10-03 | 深圳华源再生医学有限公司 | Protein adhesion resistant alginate hydrogel and preparation method and application thereof |
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