CN106832113A - A kind of temperature-resistant anti-salt flooding polymers containing nano particle - Google Patents
A kind of temperature-resistant anti-salt flooding polymers containing nano particle 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
- C08F220/00—Copolymers 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
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/56—Acrylamide; Methacrylamide
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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
- C08F2/00—Processes of polymerisation
- C08F2/44—Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/588—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/10—Nanoparticle-containing well treatment fluids
Abstract
The invention discloses a kind of temperature-resistant anti-salt flooding polymers containing nano particle.It is prepared using the method for comprising the following steps：(1) amino is accessed in nano-silica surface, obtains modified manometer silicon dioxide；(2) modified manometer silicon dioxide, water-soluble monomer and water are mixed, the pH to 4~8 for adjusting mixed system makes modified manometer silicon dioxide be thoroughly dispersed in water；To disodium ethylene diamine tetraacetate, ferrous sulfate and tetramethylethylenediamine is added in the mixed system after regulation pH value, azo-bis-isobutyrate hydrochloride, ammonium persulfate and hydrogen peroxide are subsequently adding, reaction I is carried out in a nitrogen atmosphere, reaction II is carried out after intensification；The pH of the product for reacting II is adjusted to 8~9 and to carry out constant temperature aging, crushed after drying.The present invention, by the interaction between polymer, is improved the rigidity of polymer molecule, forms network structure between polymer molecule using modified manometer silicon dioxide dispersive property and high temperature stability performance in itself, the performance such as the excellent temperature-resistant anti-salt of generation is anti-aging.
Description
Technical field
The present invention relates to a kind of temperature-resistant anti-salt flooding polymers containing nano particle, belong to water soluble polymer synthesis skill
Art field.
Background technology
Chemical flooding technology is one of technical measures that oil recovery factor improves in China, and wherein water-soluble polymer is real
One of key chemical agent of chemical flooding is applied, the swept volume of displacing fluid is expanded by the tackifying of polymer, it is possible to achieve significantly
Degree improves the purpose of oil recovery factor.At present, polymer displacement of reservoir oil, binary combination flooding (polymer-surfactant), tri compound
The tertiary oil recovery technologies such as the displacement of reservoir oil (alkali-polymer-surfactant) are obtained in the east main force such as triumph, grand celebration, Liaohe River oil field
It is widely applied, and achieves significant oil increasing precipitation effect and good economic and social benefits.But with chemical displacement of reservoir oil technology
The continuous popularization and application in oil field, implement the reservoir condition of chemical flooding worse and worse, and the reservoir reserve of low temperature low mineralization is more next
Fewer, high temperature and high salt oil deposit will turn into the battle position of chemical displacement of reservoir oil research of technique and popularization and application from now on, but the drive for using at present
The shortcoming of oil chemical agent generally existing not heatproof not salt resistance, has had a strong impact on chemical displacement of reservoir oil technology in high temperature and high salt oil deposit
Application effect, has become technical bottleneck of the restriction chemical flooding technology in high temperature and high salt oil deposit popularization and application.Therefore, research and develop
Temperature-resistant anti-salt, Polymer Used For Oil Displacement product efficiently, stable are extremely urgent.
From from the point of view of the structure of polymer with performance, acrylamide copolymer is maintained under salting liquid and high temperature
Viscosity, the method that can be taken mainly has：(1) polymer chain with big steric hindrance is introduced on main polymer chain, is carried
High polymer chain rigidity；(2) interaction between polymer molecular chain is improved, to maintain it under salting liquid and high temperature
Hydrodynamic volume, prevents being greatly lowered for viscosity.However, crossing the introducing of multifunctional monomer, product on the one hand can be increased
Cost, on the other hand, compared with acrylamide, often polymerization activity is poor for function monomer, thus can cause the molecule of copolymer
Amount is relatively low, and its thickening property is not good, and this will improve the concentration of product.
Chinese patent document CN 102181010A disclose a kind of preparation method of Heat Resistant and Salt Tolerant Polymer, preparation method
It is as follows：By anionic monomer, acrylic sodium sulfonate, cationic monomer, acrylate, alpha-olefin and acrylamide be dissolved in from
In sub- water, surfactant is added, regulation pH value of solution adds over cure to lead to nitrogen 30 minutes under the conditions of 9~10,30~60 DEG C
Hydrochlorate initiator, under the conditions of 30~60 DEG C of temperature, reacts 12h, and with acetone precipitation, washing, vacuum drying obtains white powder
Polymer, resulting polymers can be used on enhancing oil recovery in polymer flooding.
Chinese patent document CN 103320111A disclose a kind of synthetic method of quadripolymer oil displacement agent, the displacement of reservoir oil
The function that agent is prepared by acrylamide (AM), acrylic acid (AA), NVP (NVP), ethylenediamine and maleic anhydride
The quadripolymer that monomer (YEML) is constituted.Its synthetic method first to add obtained YEML monomers in flask, add AM,
NVP, AA and NaOH, lead to nitrogen 30min, are subsequently adding initiator, continue 10~20min of logical nitrogen, at 30~60 DEG C of temperature
4~12h of reaction.Finally AM/AA/NVP/YEML quadripolymers are obtained with absolute ethanol washing, crushings, drying, preparation gathers
Compound can be used to improve oil recovery factor.
Above-mentioned patent realizes the lifting of polymer temperature-resistant anti-salt performance by introducing function monomer, in the process,
Often have the following disadvantages：Function monomer preparation process is cumbersome, there is the subsequent operations such as purification, increased product cost；With third
Acrylamide single phase ratio, function monomer polymerization activity is poor, and polymer molecular weight is not high, during use, it is necessary to polymer
Concentration is high；The introducing of hydrophobic type function monomer, interior salt form function monomer, reduces the solubility property of polymer, during use,
The dissolution time of polymer increases, and insoluble matter ratio increases, and influences using and promoting for product.
The content of the invention
It is an object of the invention to provide a kind of temperature-resistant anti-salt flooding polymers containing nano particle, the present invention is conventional third
On the basis of acrylamide polymer, introducing has the modified manometer silicon dioxide compared with strong interaction with polymer molecule, from
And between playing the rigidity for improving polymer molecule, the high-temperature stability for improving side base in polymer molecule, building polymer molecule
Network etc. is acted on.
A kind of temperature-resistant anti-salt flooding polymers containing nano particle that the present invention is provided, using the side for comprising the following steps
Method is prepared：
(1) amino is accessed in nano-silica surface, obtains modified manometer silicon dioxide；
(2) modified manometer silicon dioxide, water-soluble monomer and water are mixed, adjusts the pH value of mixed system to 4~8
The modified manometer silicon dioxide is set to be thoroughly dispersed in water；To regulation pH value after mixed system in add ethylenediamine tetra-acetic acid
Disodium, ferrous sulfate and tetramethylethylenediamine, are subsequently adding azo-bis-isobutyrate hydrochloride, ammonium persulfate and hydrogen peroxide,
Reaction I is carried out under nitrogen atmosphere, reaction II is carried out after intensification；The pH value of the product of the reaction II is adjusted to 8~9 simultaneously
Carry out constant temperature aging, crush after drying, you can obtain the temperature-resistant anti-salt flooding polymers containing nano particle.
Above-mentioned flooding polymers, in step (1), the nano silicon is used as a kind of general nano material, tool
Have size tunable, low manufacture cost, many advantages, such as nontoxic, specific surface area is high.The nano-silica surface is with a large amount of
Silicone hydroxyl, can by react its surface introduce amino, so as to prepare the modified manometer silicon dioxide of surface amination.With not
Modified nano silicon is compared, and the modified manometer silicon dioxide surface can be cationized, therefore, with very excellent
Dispersive property, under high temperature and alkaline environment, particle in itself have more preferable stability.
What the method used in nano-silica surface access amino can be known to the skilled person appoints
The method of what amination nano silicon, includes but is not limited to the method for comprising the following steps：By nano silicon and band
The silane coupler for having amino is scattered in the mixed liquor of water and ethanol, and system pH is adjusted into anti-to carrying out after 7~9 flowing back
Should, will can obtain the modified manometer silicon dioxide after product filtering, drying.
Concentration of the nano silicon in the mixed liquor can be 10~100gL-1, concretely 30~
60g·L-1, 40~50gL-1、40g·L-1Or 50gL-1。
The particle diameter of the nano silicon can be 10~300nm, concretely 10~150nm, 80~100nm, 30~
50nm。
Concentration of the silane coupler with amino in the mixed liquor can be 5~50gL-1, concretely 18
~25gL-1、18g·L-1Or 25gL-1。
The silane coupler with amino can be aminopropyl triethoxysilane, 3- (2- aminoethyl aminos) propyl group three
Methoxy silane, 3- (2- aminoethyl aminos) propyl-triethoxysilicane, [3- (2- aminoethyl aminos) propyl group] dimethoxy silicon
Alkane, (3- methylaminopropyls) trimethoxy silane, 3- aminopropyls dimethyl methoxy silane, 3- [2- (2- aminoethyl aminos) second
Base amino] propyl trimethoxy silicane, any one in (3- aminopropyls) dimethylethoxysilane.
In the mixed liquor, the volume ratio of second alcohol and water is (8~11)：1, concretely 9：1.
The temperature of the back flow reaction can be 78~82 DEG C, and concretely 80 DEG C, the time can be 4~6 hours, concretely
4 hours.
Above-mentioned flooding polymers, in step (2), the water-soluble monomer, the modified manometer silicon dioxide and water
Weight ratio can be 1：(0.001~0.08)：(0.5~15), concretely 1：(0.02~0.04)：(2~3), 1：0.02：3、1：
0.04：3 or 1：0.02：2.
The water-soluble monomer can be at least one mixture of acrylamide and following monomer：Ethenyl pyrrolidone
Ketone, PAA, 2- acrylamide-2-methylpro panesulfonic acids sodium, sodium vinyl sulfonate, SSS；The water solubility
Monomer concretely following 1) -3) in any one：
1) mixture of acrylamide and 2- acrylamide-2-methylpro panesulfonic acid sodium；
2) mixture of acrylamide, 2- acrylamide-2-methylpro panesulfonic acids sodium and vinyl pyrrolidone；
3) mixture of acrylamide, PAA and vinyl pyrrolidone.
In the mixture, the weight/mass percentage composition of the acrylamide can be 40%~95%, concretely 60%~
80%th, 60% or 80%.
Above-mentioned flooding polymers, in step (2), specifically can adjust the modified manometer silicon dioxide, water-soluble monomer
The pH value of the mixed system being mixed to get with water is to 5.5~7.5,5.6~6.3,5.6 or 6.3.The dispersion is under agitation
Carry out.
Above-mentioned flooding polymers, in step (2), the quality of the disodium ethylene diamine tetraacetate can be the water-soluble mono
The 0.0002%~0.005% of the quality of body, concretely 0.002%~0.004%, 0.002% or 0.004%；
The quality of the ferrous sulfate can be the 0.00002%~0.0005% of water-soluble mono weight, concretely
0.0002%~0.0003%, 0.0002% or 0.0003%；
The quality of the tetramethylethylenediamine can be the 0.00005%~0.001% of water-soluble mono weight, concretely
0.0002%；
The quality of the azo-bis-isobutyrate hydrochloride can be the 0.002~0.02% of the water-soluble mono weight, tool
Body can be 0.006%；
The quality of the ammonium persulfate can be the 0.0001~0.001% of the water-soluble mono weight, concretely
0.0004%；
The quality of the hydrogen peroxide can be the 0.00001%~0.0005% of water-soluble mono weight, concretely
0.0003%~0.0004%, 0.0003% or 0.0004%.
Above-mentioned flooding polymers, in step (2), the disodium ethylene diamine tetraacetate, the ferrous sulfate and described four
The order of addition of methyl ethylenediamine is unrestricted, the azo-bis-isobutyrate hydrochloride, the ammonium persulfate and the peroxidating
The order of addition of hydrogen is unrestricted.
Above-mentioned flooding polymers, in step (2), the temperature of the reaction I can within 10 DEG C, concretely 8~10
DEG C, 8 DEG C or 10 DEG C, the time can be 1~10 hour, concretely 1~5 hour, 2~4 hours, 2 hours or 4 hours.
Above-mentioned flooding polymers, in step (2), the temperature of the reaction II can be 50~80 DEG C, the time can for 0.5~
5 hours, concretely 1~3 hour, 1.5~3 hours, 1.5 hours or 3 hours.
Above-mentioned flooding polymers, in step (2), can specifically be adjusted to 8.6 the pH of the product of the reaction II
And it is aging to carry out constant temperature.The aging temperature of the constant temperature is identical with the temperature of the reaction II, and the time is 1~3 hour, specifically may be used
It is 2 hours.
The present invention can be with using the modified manometer silicon dioxide itself with good dispersive property and high temperature stability performance
Very strong hydrogen bond action is formed with the side base in polymer molecule, such that it is able to form " organic and inorganic " composite construction, improves poly-
The rigidity and high-temperature stability of adduct molecule；Additionally, the cation on modified manometer silicon dioxide surface can and polymer molecule
Anion on chain forms very strong electrostatic interaction, such that it is able to build the network structure between polymer molecule, enhancing polymerization
The performance such as the temperature-resistant anti-salt of thing is anti-aging.
The present invention has the advantages that：
(1) raw material used by the inventive method is easy to get, cheap, preparation process is simple, it is easy to operate.
(2) monomer reactivity selected by the inventive method is higher, it is easy to prepare high molecular weight products, and thickening property is excellent,
Product dosage is small when using.
(3) the inventive method has good dispersive property and high-temperature stability in itself using modified manometer silicon dioxide
Can, by its stronger interaction between polymer, the rigidity of polymer molecule can be improved, good polymer is formed
Intermolecular net structure, so that the performance such as produce excellent temperature-resistant anti-salt anti-aging.
(4) nano particle of the present invention has certain washing oil effect in itself.
(5) product that the inventive method is prepared is good with other chemicals for EOR compatibilities.
(6) product that the inventive method is prepared is smaller to environmental hazard using safety.
Above-mentioned various features show that the inventive method is adapted to industrial production, and is with a wide range of applications.
Brief description of the drawings
Fig. 1 is the relation curve of the oil displacement experiment moisture content/recovery ratio with solution injected slurry volume of polymer in embodiment 1.
Specific embodiment
Experimental technique used in following embodiments is conventional method unless otherwise specified.
Material used, reagent etc. in following embodiments, unless otherwise specified, commercially obtain.
With reference to specific embodiment, the present invention will be further described, but the scope of the present invention is not limited only to this.
Embodiment 1, temperature-resistant anti-salt flooding polymers of the preparation containing nano particle
The temperature-resistant anti-salt flooding polymers containing nano particle are prepared in accordance with the following steps：
(1) preparation of modified manometer silicon dioxide
Nano silicon and silane coupler with amino are scattered in water：Ethanol is 1：In the system of 9 (v/v),
Regulation system pH to 8, back flow reaction 4 hours, product filtering, drying obtain modified manometer silicon dioxide.Nanometer titanium dioxide used
The particle diameter of silicon is 80~100nm, and concentration is 50gL-1, the silane coupler with amino is aminopropyl triethoxysilane, dense
It is 18gL to spend-1。
(2) preparation of the temperature-resistant anti-salt flooding polymers containing nano particle
By the above-mentioned modified manometer silicon dioxides for preparing of 1g, 30g acrylamides, 20g 2- acrylamido -2- first
Base propanesulfonate and 150g deionized waters are added in the wolf bottle equipped with agitator, logical nitrogen pipe and thermometer, and temperature is 8
DEG C, pH is 6.3, stirs and is passed through nitrogen to modified manometer silicon dioxide and be completely dispersed, and then sequentially adds 1mg ethylenediamine tetrems
Acid disodium, 0.1mg ferrous sulfate, 0.1mg tetramethylethylenediamines, 3mg azo-bis-isobutyrate hydrochlorides, 0.2mg ammonium persulfates and
0.15mg hydrogen peroxide, is reacted 2 hours, then temperature is increased into 60 DEG C, is reacted 1.5 hours, adds NaOH solution by system pH
8.6 are adjusted to, product is dried, crushed by aging 2 hours of constant temperature (60 DEG C), is obtained the temperature-resistant anti-salt displacement of reservoir oil containing nano particle and is gathered
Compound.
Embodiment 2, temperature-resistant anti-salt flooding polymers of the preparation containing nano particle
As described in Example 1, except that the particle diameter of the nano silicon in step (1) is 30~50nm, concentration
It is 45gL-1。
Embodiment 3, temperature-resistant anti-salt flooding polymers of the preparation containing nano particle
As described in Example 1, except that the silane coupler with amino is N- aminoethyls-γ-ammonia in step (1)
Propyl trimethoxy silicane, concentration is 25gL-1。
Embodiment 4, temperature-resistant anti-salt flooding polymers of the preparation containing nano particle
As described in Example 1, except that the dosage of the modified manometer silicon dioxide in step (2) is 2g.
Embodiment 5, temperature-resistant anti-salt flooding polymers of the preparation containing nano particle
As described in Example 1, except that acrylamide is 40g, 2- acrylamido -2- methyl-props in step (2)
Sodium sulfonate is 10g, and deionized water is 100g.
Embodiment 6, temperature-resistant anti-salt flooding polymers of the preparation containing nano particle
As described in Example 1, except that in step (2) monomer be 30g acrylamides, 10g 2- acrylamidos-
2- methyl propane sulfonic acid sodium, 10g vinyl pyrrolidones.
Embodiment 7, temperature-resistant anti-salt flooding polymers of the preparation containing nano particle
As described in Example 1, except that monomer is 30g acrylamides, 10g PAAs, 10g second in step (2)
Vinyl pyrrolidone.
Embodiment 8, temperature-resistant anti-salt flooding polymers of the preparation containing nano particle
As described in Example 1, except that disodium ethylene diamine tetraacetate is 2mg in step (2), ferrous sulfate is
0.15mg, hydrogen peroxide is 0.2mg.
Embodiment 9, temperature-resistant anti-salt flooding polymers of the preparation containing nano particle
As described in Example 1, except that it is 4 hours, 60 DEG C in 5.6,10 DEG C of reaction time that reaction pH is in step (2)
React is 3 hours.
Comparative example 1, prepare flooding polymers
As described in Example 1, except that not adding modified manometer silicon dioxide.
Comparative example 2, certain flooding polymers
Comparative example 2 is certain Oil Field flooding polymers (Tianjin Bo Hong petrochemical industries Co., Ltd, BHKY-3).
Embodiment and comparative example properties of product are evaluated：
With the polymer solution that mineralized water prepared polymer concentration is 0.2%, stirring 20 seconds is kept off with WARRING agitators 1,
Under conditions of 90 DEG C, aging 90 days, tested with Brookfield DV3T types viscosimeter and shear front and rear, aging front and rear polymer
The viscosity of solution, test temperature is 90 DEG C, and test rotating speed is 6r/min.The composition of mineralized water as shown in table 1, comment by anti-shear performance
As shown in table 2, high-temperature aging resisting Evaluation results are as shown in table 3 for valency result.
Table 1, mineralized water is constituted
Table 2, anti-shear performance evaluation result
Table 3, high-temperature aging resisting Evaluation results
The polymer prepared using embodiment 1 carries out improving recovery ratio laboratory experiment, by obtained polymer mineralized water
0.2% polymer solution is configured to, the solution is injected into (fill out sand tube sectional area 4.91cm in one-dimensional sandpack column2, length
30cm) initial oil saturation is 75%, and, to moisture content 98%, (crude oil used is in 90 DEG C, shear rate 7.34s for water drive-1Condition
Lower viscosity be 61.5mPas) injection rate be 1mL/min, inject 0.35PV aqueous solutions of polymers after, continuation water drive is extremely
Moisture content reaches 98%, measures recovery ratio and improves 20.3%.Oil displacement experiment moisture content/the recovery ratio of polymer is injected with solution
The relation curve of volume is as shown in Figure 1.
Claims (8)
1. a kind of temperature-resistant anti-salt flooding polymers containing nano particle, it is characterised in that：It is using the side for comprising the following steps
Method is prepared：
(1) amino is accessed in nano-silica surface, obtains modified manometer silicon dioxide；
(2) modified manometer silicon dioxide, water-soluble monomer and water are mixed, the pH value for adjusting mixed system makes institute to 4~8
Modified manometer silicon dioxide is stated to be thoroughly dispersed in water；To addition ethylenediamine tetra-acetic acid two in the mixed system after regulation pH value
Sodium, ferrous sulfate and tetramethylethylenediamine, are subsequently adding azo-bis-isobutyrate hydrochloride, ammonium persulfate and hydrogen peroxide, in nitrogen
Reaction I is carried out under gas atmosphere, reaction II is carried out after intensification；The pH value of the product of the reaction II is adjusted to 8~9 and is gone forward side by side
Row constant temperature is aging, crushes after drying, you can obtain the temperature-resistant anti-salt flooding polymers containing nano particle.
2. flooding polymers according to claim 1, it is characterised in that：It is described in nano silicon table in step (1)
The method that face access amino is used includes that step is as follows：Nano silicon and silane coupler with amino are scattered in
In the mixed liquor of water and ethanol, system pH is adjusted to carrying out back flow reaction after 7~9, will be after product filtering, drying i.e.
Can obtain the modified manometer silicon dioxide.
3. flooding polymers according to claim 2, it is characterised in that：In step (1), the nano silicon is in institute
It is 10~100gL to state the concentration in mixed liquor-1；The particle diameter of the nano silicon is 10~300nm；
Concentration of the silane coupler with amino in the mixed liquor is 5~50gL-1；
The silane coupler with amino is aminopropyl triethoxysilane, 3- (2- aminoethyl aminos) propyl trimethoxy
Silane, 3- (2- aminoethyl aminos) propyl-triethoxysilicane, [3- (2- aminoethyl aminos) propyl group] dimethoxysilane, (3-
Methylaminopropyl) trimethoxy silane, 3- aminopropyls dimethyl methoxy silane, 3- [2- (2- aminoethyl aminos) ethylamino]
Any one in propyl trimethoxy silicane, (3- aminopropyls) dimethylethoxysilane；
In the mixed liquor, the volume ratio of second alcohol and water is (8~11)：1；
The temperature of the back flow reaction is 78~82 DEG C, and the time is 4~6 hours.
4. flooding polymers according to any one of claim 1-3, it is characterised in that：In step (2), the water solubility
The weight ratio of monomer, modified manometer silicon dioxide and water is 1：(0.001~0.08)：(0.5~15)；
The water-soluble monomer is at least one mixture of acrylamide and following monomer：Vinyl pyrrolidone, propylene
Sour sodium, 2- acrylamide-2-methylpro panesulfonic acids sodium, sodium vinyl sulfonate, SSS；It is described in the mixture
The weight/mass percentage composition of acrylamide is 40%~95%.
5. flooding polymers according to any one of claim 1-4, it is characterised in that：In step (2), the ethylenediamine
The quality of tetraacethyl disodium is the 0.0002%~0.005% of the quality of the water-soluble monomer；
The quality of the ferrous sulfate can be the 0.00002%~0.0005% of water-soluble mono weight；
The quality of the tetramethylethylenediamine is the 0.00005%~0.001% of water-soluble mono weight；
The quality of the azo-bis-isobutyrate hydrochloride is the 0.002~0.02% of the water-soluble mono weight；
The quality of the ammonium persulfate is the 0.0001~0.001% of the water-soluble mono weight；
The quality of the hydrogen peroxide is the 0.00001%~0.0005% of water-soluble mono weight.
6. flooding polymers according to any one of claim 1-5, it is characterised in that：In step (2), the reaction I
Temperature within 10 DEG C, the time is 1~10 hour.
7. flooding polymers according to any one of claim 1-6, it is characterised in that：In step (2), the reaction II
Temperature be 50~80 DEG C, the time be 0.5~5 hour.
8. flooding polymers according to any one of claim 1-7, it is characterised in that：The aging temperature of the constant temperature with
The temperature of the reaction II is identical, and the time is 1~3 hour.
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