CN104861950A - Supramolecular linear polyacrylamide oil displacement agent and preparation method thereof - Google Patents
Supramolecular linear polyacrylamide oil displacement agent and preparation method thereof Download PDFInfo
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- CN104861950A CN104861950A CN201510256192.7A CN201510256192A CN104861950A CN 104861950 A CN104861950 A CN 104861950A CN 201510256192 A CN201510256192 A CN 201510256192A CN 104861950 A CN104861950 A CN 104861950A
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- polyacrylamide
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- diamantane
- displacing agent
- oil
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- 229920002401 polyacrylamide Polymers 0.000 title claims abstract description 70
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 238000006073 displacement reaction Methods 0.000 title abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- WHGYBXFWUBPSRW-FOUAGVGXSA-N beta-cyclodextrin Chemical class OC[C@H]([C@H]([C@@H]([C@H]1O)O)O[C@H]2O[C@@H]([C@@H](O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O3)[C@H](O)[C@H]2O)CO)O[C@@H]1O[C@H]1[C@H](O)[C@@H](O)[C@@H]3O[C@@H]1CO WHGYBXFWUBPSRW-FOUAGVGXSA-N 0.000 claims abstract description 26
- 239000000654 additive Substances 0.000 claims abstract description 9
- 230000000996 additive effect Effects 0.000 claims abstract description 9
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 42
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 36
- 238000003756 stirring Methods 0.000 claims description 34
- 239000007787 solid Substances 0.000 claims description 25
- ZICQBHNGXDOVJF-UHFFFAOYSA-N diamantane Chemical compound C1C2C3CC(C4)CC2C2C4C3CC1C2 ZICQBHNGXDOVJF-UHFFFAOYSA-N 0.000 claims description 22
- 229910052757 nitrogen Inorganic materials 0.000 claims description 18
- 238000005502 peroxidation Methods 0.000 claims description 11
- 239000002904 solvent Substances 0.000 claims description 11
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 claims description 10
- 229940123973 Oxygen scavenger Drugs 0.000 claims description 8
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 8
- -1 formaldehyde, diamine Chemical class 0.000 claims description 7
- 239000003999 initiator Substances 0.000 claims description 7
- 238000000967 suction filtration Methods 0.000 claims description 7
- 238000001291 vacuum drying Methods 0.000 claims description 7
- YNAVUWVOSKDBBP-UHFFFAOYSA-N Morpholine Chemical compound C1COCCN1 YNAVUWVOSKDBBP-UHFFFAOYSA-N 0.000 claims description 6
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims description 5
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 claims description 5
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 5
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 4
- 238000006392 deoxygenation reaction Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 4
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 3
- LBPACUJFGRCWDF-UHFFFAOYSA-L Cl[Mg]Cl.[Na] Chemical compound Cl[Mg]Cl.[Na] LBPACUJFGRCWDF-UHFFFAOYSA-L 0.000 claims description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 3
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 3
- PXAJQJMDEXJWFB-UHFFFAOYSA-N acetone oxime Chemical compound CC(C)=NO PXAJQJMDEXJWFB-UHFFFAOYSA-N 0.000 claims description 3
- 239000001110 calcium chloride Substances 0.000 claims description 3
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 3
- 235000011148 calcium chloride Nutrition 0.000 claims description 3
- 235000017550 sodium carbonate Nutrition 0.000 claims description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 3
- 235000011152 sodium sulphate Nutrition 0.000 claims description 3
- PODWXQQNRWNDGD-UHFFFAOYSA-L sodium thiosulfate pentahydrate Chemical compound O.O.O.O.O.[Na+].[Na+].[O-]S([S-])(=O)=O PODWXQQNRWNDGD-UHFFFAOYSA-L 0.000 claims description 3
- 238000011084 recovery Methods 0.000 abstract description 12
- 239000000203 mixture Substances 0.000 abstract description 10
- 238000006243 chemical reaction Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 5
- 230000032683 aging Effects 0.000 abstract description 4
- ORILYTVJVMAKLC-UHFFFAOYSA-N adamantane Chemical compound C1C(C2)CC3CC1CC2C3 ORILYTVJVMAKLC-UHFFFAOYSA-N 0.000 abstract 6
- 229920000858 Cyclodextrin Polymers 0.000 description 14
- 235000011175 beta-cyclodextrine Nutrition 0.000 description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 239000003921 oil Substances 0.000 description 12
- 239000001116 FEMA 4028 Substances 0.000 description 11
- 229960004853 betadex Drugs 0.000 description 11
- 239000000243 solution Substances 0.000 description 10
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 8
- 239000013078 crystal Substances 0.000 description 8
- 239000000706 filtrate Substances 0.000 description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000010792 warming Methods 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 5
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 4
- 238000004821 distillation Methods 0.000 description 4
- 230000007062 hydrolysis Effects 0.000 description 4
- 238000006460 hydrolysis reaction Methods 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 150000003926 acrylamides Chemical class 0.000 description 3
- 239000012153 distilled water Substances 0.000 description 3
- 230000002209 hydrophobic effect Effects 0.000 description 3
- YYROPELSRYBVMQ-UHFFFAOYSA-N 4-toluenesulfonyl chloride Chemical compound CC1=CC=C(S(Cl)(=O)=O)C=C1 YYROPELSRYBVMQ-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- DPDMMXDBJGCCQC-UHFFFAOYSA-N [Na].[Cl] Chemical compound [Na].[Cl] DPDMMXDBJGCCQC-UHFFFAOYSA-N 0.000 description 2
- 229920006322 acrylamide copolymer Polymers 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000015784 hyperosmotic salinity response Effects 0.000 description 2
- 229910001629 magnesium chloride Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- 125000005073 adamantyl group Chemical group C12(CC3CC(CC(C1)C3)C2)* 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 239000003708 ampul Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
Classifications
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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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B37/00—Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
- C08B37/0006—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid
- 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
-
- 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
- C08F120/00—Homopolymers 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
- C08F120/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F120/52—Amides or imides
- C08F120/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F120/56—Acrylamide; Methacrylamide
-
- 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
- C08F4/00—Polymerisation catalysts
- C08F4/28—Oxygen or compounds releasing free oxygen
- C08F4/32—Organic compounds
- C08F4/34—Per-compounds with one peroxy-radical
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Biochemistry (AREA)
- Cosmetics (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The invention discloses a supramolecular linear polyacrylamide oil displacement agent which comprises the following components: adamantane terminated polyacrylamide, beta-cyclodextrin dimer, an additive, a deoxidant and water. A preparation method of the supramolecular linear polyacrylamide oil displacement agent comprises the following steps: a, the adamantane terminated polyacrylamide is prepared; b, the additive and the deoxidant are added to water, the mixture is stirred uniformly, the adamantane terminated polyacrylamide is added, the mixture is stirred and left to stand for a reaction, the beta-cyclodextrin dimer is added, the mixture is stirred and left to stand for a reaction, and an obtained solution is the supramolecular linear polyacrylamide oil displacement agent. According to the supramolecular linear polyacrylamide oil displacement agent and the preparation method thereof, the viscosity of the oil displacement agent prepared with the method is hardly affected by the molecular weight and is adjustable; a molecular chain of supramolecular polyacrylamide is linear, the solubility of the oil displacement agent is good, the oil displacement agent has higher ageing resistance, and the recovery ratio is increased obviously with adoption of the oil displacement agent.
Description
Technical field
The invention belongs to technical field of oilfield tertiary oil recovery, specifically, relate to a kind of supramolecule linear polyacrylamide oil-displacing agent and preparation method thereof.
Background technology
At present, the maturing field of China totally enters high recovery percent of reserves, the mid-later development phase of High water cut.Guarantee that it is one of significant challenge of facing of China's oil production industry that high water cut oil field continuously steady production produces.Tertiary oil recovery is the important technology that oilfields in high water cut period improves recovery ratio, and polymer flooding is one of main method of tertiary oil recovery.Polyacrylamide and acrylamide copolymer are that polymer flooding uses maximum a kind of chemical oil displacement agents.The high molecular that relies on polyacrylamide improves the viscosity of displacing fluid and then improves swept volume, but due to the restriction of synthesis condition, molecular weight improves limitation, and the molecular weight of the super high molecular weight polyacrylamide used at present is usually in 2.0-4.0 × 10
7left and right, therefore its tackifying ability, heat and salt resistance are all undesirable.In order to overcome the shortcoming of conventional polypropylene acid amides, people introduce a small amount of hydrophobic grouping in water-soluble polymers main chain, develop hydrophobically associated polyacrylamide.Although the Efficient Adhesive Promotion of hydrophobic associated polymer is better, the introducing due to hydrophobic monomer causes its solvability to be affected, and insolubles is more.
Summary of the invention
In order to solve existing polyacrylamide and acrylamide copolymer viscosity is low, poorly soluble, the problem of temperature resistance salt tolerance difference, the object of the present invention is to provide a kind of supramolecule linear polyacrylamide oil-displacing agent and preparation method thereof.The viscosity of this oil-displacing agent is not by the restriction of polymericular weight, and solvability is good, has certain temperature resistance salt tolerance.
1, the present invention seeks to a kind of supramolecule linear polyacrylamide oil-displacing agent realized like this, its key is to be made up of the component of following weight percent:
First the present invention prepares the polyacrylamide of the adamantyl end-blocking of structure uniqueness, then is formed inclusion compound by the Host-guest Recognition effect of diamantane and beta-cyclodextrin and then be built into based on the oil-displacing agent of supramolecule linear polymer.
The structural formula of the polyacrylamide of above-mentioned diamantane end-blocking is:
The preparation method of the polyacrylamide of above-mentioned diamantane end-blocking is: in solvent dimethylformamide, add acrylamide, dissolving stirs; Pass into nitrogen bubble deoxygenation, then add initiator peroxidation diamantane formyl, in 70 DEG C of heating in water bath; React under nitrogen protection, then suction filtration, obtain white solid, then rinse solid with solvent dimethylformamide, then at 80 DEG C, vacuum-drying, to constant weight, obtains white powdery solids, is the polyacrylamide of diamantane end-blocking.
The dimeric preparation of above-mentioned beta-cyclodextrin: add beta-cyclodextrin and sodium hydroxide successively in Xiang Shuishui, stirring and dissolving is even; Ice bath heats, and slowly drip Tosyl chloride while stirring, time for adding controls at 1-1.5 hour, then reacts 6-7 hour; Mixture is filtered through porous membrane, the pH value of filtrate is adjusted to 6-7, and process 12 hours in the ice bath of 0-3 DEG C, obtain white crystal; White crystal and Ursol D are dissolved in dimethyl formamide, then by solution warms to 100 DEG C, reaction 36 hours under stirring and nitrogen protection effect; Through underpressure distillation except desolventizing, resistates is filtered through washing with acetone, obtains white powdery solids, be beta-cyclodextrin dimer.
The structural formula of above-mentioned peroxidation diamantane formyl is:
2, a preparation method for supramolecule linear polyacrylamide oil-displacing agent, its key is to be made up of following steps:
A, in solvent dimethylformamide, add acrylamide, dissolving stirs; Pass into nitrogen bubble deoxygenation, then add initiator peroxidation diamantane formyl, in 70 DEG C of heating in water bath; React under nitrogen protection, then suction filtration, obtain white solid, then rinse solid with solvent dimethylformamide, then at 80 DEG C, vacuum-drying, to constant weight, obtains white powdery solids, is the polyacrylamide of diamantane end-blocking;
B, weigh each component by above-mentioned weight percent, then in water, additive and oxygen scavenger is added, stir, add the polyacrylamide of diamantane end-blocking again, and stir 2-3 hour under 40 degrees Celsius, place 8-12 hour, add beta-cyclodextrin dimer again, under 40 degrees Celsius, stir 3-4 hour, place 5-6 hour, gained solution is supramolecule linear polyacrylamide oil-displacing agent.
The structural formula of the polyacrylamide of above-mentioned diamantane end-blocking is:
The structural formula of above-mentioned peroxidation diamantane formyl is:
Above-mentioned additive is that the one or more than one in sodium-chlor, magnesium chloride, calcium chloride, sodium sulfate, sodium bicarbonate, sodium carbonate combines, for simulating the injection water of different salinity;
Above-mentioned oxygen scavenger is that the one or more than one in S-WAT, sodium bisulfite, Sulfothiorine, formaldehyde, diamine, thiocarbamide, acetoxime, morpholine combines, for except the dissolved oxygen in anhydrating.
3, the dimeric concentration of beta-cyclodextrin is on the impact of oil-displacing agent viscosity: use Brookfield viscometer to measure the changing conditions of viscosity with beta-cyclodextrin dimer concentration of supramolecule linear polyacrylamide system, data as shown in Figure 1.As can be seen from Figure 1, along with the dimeric concentration of beta-cyclodextrin improves, the viscosity of supramolecular system improves constantly, but after the dimeric concentration of beta-cyclodextrin is more than 60mg/L, system viscosity change is not remarkable gradually, and tend to balance state.
4, the viscosity after supramolecule linear polyacrylamide flooding system high temperature ageing is investigated
Getting many group oil-displacing agent solution 30 milliliters loads in 50 milliliters of ampoules, and sealing, puts into the baking oven of 80 degrees Celsius, keeps constant temperature 30 days.Crack ampoule and take out solution, use Brookfield-II viscometer determining viscosity (No. zero rotor, 6 revs/min), measurement result average out to 15mPa.s.Working concentration is that the partial hydrolysis type polyacrylamide (molecular weight 1,000 ten thousand) of 1500 mg/litre is contrast experiment, and measurement result is 10mPa.s.Comparing result shows, and flooding system of the present invention has better ageing resistance.
5, the indoor oil displacement efficiency of supramolecule linear polyacrylamide flooding system is investigated
Use the victory dewatered oil that sticks together to do Simulation of Crude Oil, viscosity is 27mP.s at 80 degrees celsius.Use diameter is 2.5cm, and length is the sand-filling tube model of 40cm, and use 60-80 object quartz sand to adopt wet method of adding to fill fill out sand tube, controlling rate of permeation is 0.5 darcy, calculates volume of voids.Simulated Water is used to carry out the displacement of reservoir oil with the speed of 0.34mL/min, when single water ratio is double reach more than 98% time, stop water drive, inject the supramolecule linear polyacrylamide flooding system of 0.3 pore volume injected, water drive again afterwards, when single water ratio is double reach more than 98% time, stop oil displacement experiment, result display ultimate recovery factor increase rate average out to 15.8%.Working concentration is that the partial hydrolysis type polyacrylamide (molecular weight 1,000 ten thousand) of 1500 mg/litre is contrast experiment, result display ultimate recovery factor increase rate average out to 9.3%.As shown in Figure 2, comparing result shows the oil recovery mean value curve of experiment, and flooding system of the present invention has higher recovery ratio increase rate compared with partial hydrolysis type polyacrylamide.
Beneficial effect:
A kind of supramolecule linear polyacrylamide of the present invention oil-displacing agent and preparation method thereof, the oil-displacing agent prepared by the method, its viscosity is less by molecular weight effects, and viscosity can be regulated by the dimeric add-on of adjustment beta-cyclodextrin; Linearly, its solvability is good, and this oil-displacing agent has better resistance of aging for supramolecule polyacrylamide molecular chain in this oil-displacing agent, uses this oil-displacing agent recovery ratio obviously to be promoted.
Accompanying drawing explanation
Fig. 1 be in the present invention the dimeric concentration of beta-cyclodextrin to the influence curve figure of oil-displacing agent viscosity;
Fig. 2 is supramolecule linear polyacrylamide oil-displacing agent and partial hydrolysis type polyacrylamide recovery ratio increase rate correlation curve figure in oil displacement experiment of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the invention will be further described.
Embodiment 1:
The preparation of the polyacrylamide of a, diamantane end-blocking
In 500 milliliters of there-necked flasks, add 200 grams of dimethyl formamides as solvent, then add 20 grams of acrylamides, fully stir and make it to be uniformly dissolved; Pass into nitrogen bubble 30 minutes, then add 0.1 gram of peroxidation diamantane formyl as initiator, there-necked flask is put into water-bath, is warming up to 70 degrees Celsius; React 6-8 hour under nitrogen protection; By mixture suction filtration in there-necked flask, obtain white solid, use 400 grams of dimethyl formamides to rinse solid, vacuum-drying, to constant weight, obtains white powdery solids at 80 degrees celsius afterwards, is the polyacrylamide of diamantane end-blocking.
The dimeric preparation of b, beta-cyclodextrin
In 500 milliliters of there-necked flasks, add 200 grams of water, then add 10 grams of beta-cyclodextrins successively, 6 grams of sodium hydroxide, fully stir and make it to be uniformly dissolved; There-necked flask is put into ice bath, and slowly drip 3.5 grams of Tosyl chlorides under stirring, time for adding controls at 1-1.5 hour, reaction 6-7 hour; Mixture in bottle is filtered through porous membrane, uses hydrochloric acid that the pH value of filtrate is adjusted to 6-7, filtrate to be positioned in the ice bath of 0-3 degree Celsius 12 hours, to obtain white crystal; Secondary white crystal and 0.5 gram of Ursol D are dissolved in 100g dimethyl formamide, then solution are poured in 250 milliliters of there-necked flasks, be warming up to 100 degrees Celsius, reaction 36 hours under stirring and nitrogen protection effect; Through underpressure distillation except desolventizing, resistates is filtered through washing with acetone, obtains white powdery solids, be beta-cyclodextrin dimer.
The preparation of c, supramolecule linear polyacrylamide oil-displacing agent
In beaker, add distilled water 99.4g, then add the oxygen scavenger thiocarbamide of 0.1 gram, stir.Add the polyacrylamide 0.1 gram of diamantane end-blocking again, stir 2 hours under 40 degrees Celsius, place 10 hours.Add beta-cyclodextrin dimer 0.4 gram again, stir 3 hours under 40 degrees Celsius, place 5 hours, gained solution is supramolecule linear polyacrylamide oil-displacing agent.
Embodiment 2:
The preparation of the polyacrylamide of a, diamantane end-blocking
In 500 milliliters of there-necked flasks, add 200 grams of dimethyl formamides as solvent, then add 20 grams of acrylamides, fully stir and make it to be uniformly dissolved; Pass into nitrogen bubble 30 minutes, then add 0.1 gram of peroxidation diamantane formyl as initiator, there-necked flask is put into water-bath, is warming up to 70 degrees Celsius; React 6-8 hour under nitrogen protection; By mixture suction filtration in there-necked flask, obtain white solid, use 400 grams of dimethyl formamides to rinse solid, vacuum-drying, to constant weight, obtains white powdery solids at 80 degrees celsius afterwards, is the polyacrylamide of diamantane end-blocking.
The dimeric preparation of b, beta-cyclodextrin
In 500 milliliters of there-necked flasks, add 200 grams of water, then add 10 grams of beta-cyclodextrins successively, 6 grams of sodium hydroxide, fully stir and make it to be uniformly dissolved; There-necked flask is put into ice bath, and slowly drip 3.5 grams of Tosyl chlorides under stirring, time for adding controls at 1-1.5 hour, reaction 6-7 hour; Mixture in bottle is filtered through porous membrane, uses hydrochloric acid that the pH value of filtrate is adjusted to 6-7, filtrate to be positioned in the ice bath of 0-3 degree Celsius 12 hours, to obtain white crystal; Secondary white crystal and 0.5 gram of Ursol D are dissolved in 100g dimethyl formamide, then solution are poured in 250 milliliters of there-necked flasks, be warming up to 100 degrees Celsius, reaction 36 hours under stirring and nitrogen protection effect; Through underpressure distillation except desolventizing, resistates is filtered through washing with acetone, obtains white powdery solids, be beta-cyclodextrin dimer.
The preparation of c, supramolecule linear polyacrylamide oil-displacing agent
In beaker, add distilled water 97.05g, then add the additive be made up of the sodium-chlor of 2.0g, the magnesium chloride of 0.5g, the oxygen scavenger be made up of the S-WAT of 0.025g sodium bisulfite and 0.025 gram, stir.Add the polyacrylamide 0.1 gram of diamantane end-blocking again, stir 2 hours under 40 degrees Celsius, place 10 hours.Add beta-cyclodextrin dimer 0.4 gram again, stir 3 hours under 40 degrees Celsius, place 5 hours, gained solution is supramolecule linear polyacrylamide oil-displacing agent.
Embodiment 3:
The preparation of the polyacrylamide of a, diamantane end-blocking
In 500 milliliters of there-necked flasks, add 200 grams of dimethyl formamides as solvent, then add 20 grams of acrylamides, fully stir and make it to be uniformly dissolved; Pass into nitrogen bubble 30 minutes, then add 0.1 gram of peroxidation diamantane formyl as initiator, there-necked flask is put into water-bath, is warming up to 70 degrees Celsius; React 6-8 hour under nitrogen protection; By mixture suction filtration in there-necked flask, obtain white solid, use 400 grams of dimethyl formamides to rinse solid, vacuum-drying, to constant weight, obtains white powdery solids at 80 degrees celsius afterwards, is the polyacrylamide of diamantane end-blocking.
The dimeric preparation of b, beta-cyclodextrin
In 500 milliliters of there-necked flasks, add 200 grams of water, then add 10 grams of beta-cyclodextrins successively, 6 grams of sodium hydroxide, fully stir and make it to be uniformly dissolved; There-necked flask is put into ice bath, and slowly drip 3.5 grams of Tosyl chlorides under stirring, time for adding controls at 1-1.5 hour, reaction 6-7 hour; Mixture in bottle is filtered through porous membrane, uses hydrochloric acid that the pH value of filtrate is adjusted to 6-7, filtrate to be positioned in the ice bath of 0-3 degree Celsius 12 hours, to obtain white crystal; Secondary white crystal and 0.5 gram of Ursol D are dissolved in 100g dimethyl formamide, then solution are poured in 250 milliliters of there-necked flasks, be warming up to 100 degrees Celsius, reaction 36 hours under stirring and nitrogen protection effect; Through underpressure distillation except desolventizing, resistates is filtered through washing with acetone, obtains white powdery solids, be beta-cyclodextrin dimer.
The preparation of c, supramolecule linear polyacrylamide oil-displacing agent
In beaker, add distilled water 97.05g, then add the additive be made up of the magnesium chloride of the sodium-chlor of 0.5g, 0.5g, 0.5g sodium carbonate, the oxygen scavenger be made up of 0.025g sodium bisulfite, S-WAT, the 0.03g thiocarbamide of 0.025 gram, stir.Add the polyacrylamide 0.2 gram of diamantane end-blocking again, stir 2 hours under 40 degrees Celsius, place 10 hours.Add beta-cyclodextrin dimer 0.3 gram again, stir 3 hours under 40 degrees Celsius, place 5 hours, gained solution is supramolecule linear polyacrylamide oil-displacing agent.
Claims (10)
1. a supramolecule linear polyacrylamide oil-displacing agent, is characterized in that being made up of the component of following weight percent:
2. a kind of supramolecule linear polyacrylamide oil-displacing agent according to claim 1, is characterized in that the structural formula of the polyacrylamide of described diamantane end-blocking is:
3. a kind of supramolecule linear polyacrylamide oil-displacing agent according to claim 1 and 2, is characterized in that the preparation method of the polyacrylamide of described diamantane end-blocking is: in solvent dimethylformamide, add acrylamide, dissolving stirs; Pass into nitrogen bubble deoxygenation, then add initiator peroxidation diamantane formyl, in 70 DEG C of heating in water bath; React under nitrogen protection, then suction filtration, obtain white solid, then rinse solid with solvent dimethylformamide, then at 80 DEG C, vacuum-drying, to constant weight, obtains white powdery solids, is the polyacrylamide of diamantane end-blocking.
4. a kind of supramolecule linear polyacrylamide oil-displacing agent according to claim 3, is characterized in that the structural formula of described peroxidation diamantane formyl is:
5. a kind of supramolecule linear polyacrylamide oil-displacing agent according to claim 1 or 2 or 3 or 4, is characterized in that: described additive is that the one or more than one in sodium-chlor, magnesium chloride, calcium chloride, sodium sulfate, sodium bicarbonate, sodium carbonate combines.
6. a kind of supramolecule linear polyacrylamide oil-displacing agent according to claim 1 or 2 or 3 or 4, is characterized in that: described oxygen scavenger is that the one or more than one in S-WAT, sodium bisulfite, Sulfothiorine, formaldehyde, diamine, thiocarbamide, acetoxime, morpholine combines.
7. a preparation method for supramolecule linear polyacrylamide oil-displacing agent according to claim 1, is characterized in that being made up of following steps:
A, in solvent dimethylformamide, add acrylamide, dissolving stirs; Pass into nitrogen bubble deoxygenation, then add initiator peroxidation diamantane formyl, in 70 DEG C of heating in water bath; React under nitrogen protection, then suction filtration, obtain white solid, then rinse solid with solvent dimethylformamide, then at 80 DEG C, vacuum-drying, to constant weight, obtains white powdery solids, is the polyacrylamide of diamantane end-blocking;
B, weigh each component by weight percent described in claim 1, then in water, additive and oxygen scavenger is added, stir, add the polyacrylamide of diamantane end-blocking again, and stir 2-3 hour under 40 degrees Celsius, place 8-12 hour, add beta-cyclodextrin dimer again, under 40 degrees Celsius, stir 3-4 hour, place 5-6 hour, gained solution is supramolecule linear polyacrylamide oil-displacing agent.
8. the preparation method of a kind of supramolecule linear polyacrylamide oil-displacing agent according to claim 7, is characterized in that the structural formula of the polyacrylamide of described diamantane end-blocking is:
9. the preparation method of a kind of supramolecule linear polyacrylamide oil-displacing agent according to claim 7 or 8, is characterized in that the structural formula of described peroxidation diamantane formyl is:
10. the preparation method of a kind of supramolecule linear polyacrylamide oil-displacing agent according to claim 7 or 8, is characterized in that: described additive is that the one or more than one in sodium-chlor, magnesium chloride, calcium chloride, sodium sulfate, sodium bicarbonate, sodium carbonate combines;
Described oxygen scavenger is that the one or more than one in S-WAT, sodium bisulfite, Sulfothiorine, formaldehyde, diamine, thiocarbamide, acetoxime, morpholine combines.
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