CN107686535A - Polymer with selective water plugging function and its preparation method and application - Google Patents
Polymer with selective water plugging function and its preparation method and application Download PDFInfo
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- CN107686535A CN107686535A CN201610633018.4A CN201610633018A CN107686535A CN 107686535 A CN107686535 A CN 107686535A CN 201610633018 A CN201610633018 A CN 201610633018A CN 107686535 A CN107686535 A CN 107686535A
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- 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
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- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
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Abstract
The present invention relates to oil recovering field, disclose a kind of polymer with selective water plugging function and its preparation method and application, the polymer contains construction unit A, construction unit B and construction unit C, wherein, the construction unit A is the construction unit with structure shown in formula (1), the construction unit B is the construction unit with structure shown in formula (2), and the construction unit C is the construction unit with structure shown in formula (3).Polymer provided by the invention has high selectivity water blockoff function, the water shutoff material formed using the polymer can obtain effect of the water blockoff without blocking up oil with high selectivity, and the polymer of the present invention has excellent temperature-resistant anti-salt performance and dilatancy, and then water phase permeability can be reduced, increase aqueous phase plugging action.
Description
Technical field
The present invention relates to oil recovering field, in particular it relates to a kind of polymer with selective water plugging function, one kind
Prepare the polymer with selective water plugging function method and by this method be prepared with selective water plugging function
Polymer, have selective water plugging function polymer alternatively property water shutoff agent application.
Background technology
Polymerization species water shutoff agent is the water shutoff agent of current large-scale application, is broadly divided into the relative permeability regulation of polymerization species
Agent (also known as relative permeability modifier) and polymer gel class water shutoff agent.Both main distinctions are that relative permeability modifier is mainly long-chain
Polymer molecule class, stretch in aqueous phase by polymer molecular chain, shunk in oil phase, form the drag interaction to aqueous phase,
Water phase permeability is reduced, the system will not cause the physics of pore volume to block；Polymer gel class water shutoff agent is by means of profit
The change of the lower effectively movable volume of effect, makes Oil/water Phase Permeability that uneven reduction occur, but the processing mode can cause oil
Aquaporin physics blocks, and causes Porous Media ability to decline, and oil productive capacity also drops while oil well production water is greatly lowered
Low, dealing with improperly can cause Liquid output too low, make the crude oil underproduction, therefore the system is mostly used for the serious water filling of heterogeneous situation
The processing of well intake profile, need during for producing well water blockoff by complex householder method as temporary stifled method, annular space extreme pressure method,
Cross displacement method etc..
Polymerization species water shutoff agent has good practical function, but must be according to the reality in each oil field during use
Situation formulates corresponding injection technology, otherwise injects water shutoff agent and does not have water plugging effect not only, aquatic products amount is increased, crude oil
Yield declines.
Thickened oil water shutoff agent is made up of high viscosity oil and surfactant, that is, adds having for w/o type emulsifying agent
The viscous crude of certain viscosity.Thickened oil is pumped into oil-well strata under high pressure, and the thickened oil into oil stream duct will be dissolved in in-place oil
And from oil well produced, the stratum water or injection water of thickened oil and seepage flow into water stream channel mixs and emulsified, formation Water-In-Oil
Emulsion, its viscosity significantly rise.There is the mechanism of plugging function mainly to include the following aspects for it：It is 1. thick after emulsification
Oil is formed spherical by hydro jet, and physical clogging is caused in the pore throat portion of water stream channel；2. viscous crude adsorbs in current cell walls, make
Wall rock is changed into oleophylic from hydrophilic, and reduces duct, hinders the flowing of water；3. the surface active composition in viscous crude makes viscous crude
Emulsification forms oil droplet in water, and Jamin effect is produced in hole, makes the permeability reduction of water.But oil emulsion is a kind of tool
There is the water shutoff agent that obvious water blockoff does not block up oily characteristic, the research and application of such water shutoff agent of the controllability official post of its emulsification are limited
System.
Compound water shutoff agent is usually the existing some strength for being added polymeric solution by cheap inorganic water shutoff agent and being formed
There are the compound selective water shutoff agent of certain selectivity, such as sodium metasilicate-polymer selective plugging agent, terpolymer selective plugging agent again.
At present, domestic and international selective water shutoff agent and Novel technique of in-depth profile control become better and approaching perfection day by day, in grinding for selective water plugging material
Studying carefully exploitation, construction technology etc. has technically had tremendous development, but as oil field development, oil-layer characteristic and environment are constantly sent out
Changing, particularly to development late stage, make the contradiction of oil reservoir development more prominent using water shutoff material for a long time, according to selectivity
The characteristic of water shutoff material, the experience of oil field actual development is summarized, proposes the technical barrier that current selective water shutoff agent must pull against,
It is particularly important targetedly to research and develop new technology with adapting to the water plugging effect of the selective system of special oil field improvement.
The research of selective water shutoff agent is the result of material technology development, the material microstructure understanding based on molecular level
And synthesis modification technology by be selective water shutoff agent study key；The mutual of blocking agent and rock is studied under oil reservoir full-scale condition
The mechanism of action, the basis that water plugging effect is selective water-plugging research and evaluation is deduced from molecular level.
To sum up, selective water-plugging used in oilwell water shutoff is mostly by water solubilitys such as polyacrylamide and its derivatives at present
Polymer generates gel or frozen glue in stratum and stratum water is blocked, or meets water plastic or solidification closure water with oil base blocking agent
Passage is altered, but due to its poor selectivity, oleic permeability can also be greatly lowered while water blockoff, cause stifled rear low liquid, system
The about application of water shutoff in oil well.
Therefore, a kind of new high selectivity water shutoff material is developed, the not stifled oil of water blockoff of oil reservoir is realized, ultra-high water cut stage is carried
High oil well productivity has great importance.
The content of the invention
The purpose of the present invention is the defects of overcoming prior art, there is provided a kind of water shutoff material with profit high selectivity and
Its preparation method and application, the water shutoff material provided by the invention with profit high selectivity is with excellent temperature-resistant anti-salt performance
And dilatancy, and then water phase permeability can be reduced, aqueous phase plugging action is increased, so as to reach the not stifled oil of selective water plugging
Effect.
To achieve these goals, should in a first aspect, the present invention provides a kind of polymer with selective water plugging function
Polymer contains construction unit A, construction unit B and construction unit C, wherein, the construction unit A is with knot formula (1) Suo Shi
The construction unit of structure, the construction unit B are the construction unit with structure shown in formula (2), and the construction unit C is with formula
(3) construction unit of structure shown in；Wherein, on the basis of the weight of the polymer, the content of the construction unit A is 30-
90 weight %, construction unit B content is that 5-50 weight %, the construction unit C content are 1-30 weight %, and should
The expansion multiple of polymer is 75-110；
Wherein, R1And R2It is each independently H or C1-C4 alkyl；R3For C1-C14 alkylidene；R4And R5It is each independent
Ground is H or C1-C4 alkyl, and R4And R5It is asynchronously H；M is H, Na or K；R6For H or C1-C4 alkyl；T is the whole of 1-8
Number, p are 1-10 integer, and n is 1-6 integer.
Second aspect, the present invention provide a kind of method for preparing the polymer with selective water plugging function, this method bag
Include：In the presence of initiator, crosslinking agent and as the water of solvent, make monomer D, monomer E and monomer F progress polymerisation in solutions anti-
Should, wherein, the monomer D is the monomer with structure shown in formula (4), and the monomer E is the list with structure shown in formula (5)
Body, the monomer F are the monomer with structure shown in formula (6), wherein, the monomer D, monomer E and monomer F dosage to make
Construction unit A content is that 30-90 weight %, construction unit B content are 5-50 weight % in standby obtained polymer, structure
Unit C content is 1-30 weight %, and the expansion multiple for the polymer for be prepared is 75-110；The structure list
First A is the construction unit with structure shown in formula (1), and the construction unit B is the construction unit with structure shown in formula (2),
The construction unit C is the construction unit with structure shown in formula (3),
Wherein, R1And R2It is each independently H or C1-C4 alkyl；R3For C1-C14 alkylidene；R4And R5It is each independent
Ground is H or C1-C4 alkyl, and R4And R5It is asynchronously H；M is H, Na or K；R6For H or C1-C4 alkyl；T is the whole of 1-8
Number, p are 1-10 integer, and n is 1-6 integer.
The third aspect, the present invention provide the polymer with selective water plugging function being prepared by preceding method.
Fourth aspect, the present invention provides the foregoing polymer with selective water plugging function, and alternatively property water shutoff agent is answered
With.
The present invention is obtained with high selectivity by introducing a kind of styrene type zwitterionic monomer in macromolecular chain
The polymer water plugging material of water blockoff function.Polymer provided by the invention has high selectivity water blockoff function, uses the polymer
The water shutoff material of formation can obtain the effect of water blockoff with high selectivity without blocking up oil, and the polymer of the present invention have it is excellent
Temperature-resistant anti-salt performance and dilatancy, and then water phase permeability can be reduced, increase aqueous phase plugging action.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Embodiment
The embodiment of the present invention is described in detail below.It is it should be appreciated that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to limit the invention.
The end points of disclosed scope and any value are not limited to the accurate scope or value herein, these scopes or
Value should be understood to comprising the value close to these scopes or value.For number range, between the endpoint value of each scope, respectively
It can be combined with each other between the endpoint value of individual scope and single point value, and individually between point value and obtain one or more
New number range, these number ranges should be considered as specific open herein.
In the present invention, the alkyl of the C1-C4 refers to the alkyl that carbon number is 1-4；The alkylidene of the C1-C14
Refer to the alkylidene that carbon number is 1-14.1-8 integer includes 1,2,3,4,5,6,7 and 8.The integer of the 1-10 include 1,
2nd, 3,4,5,6,7,8,9 and 10.The integer of the 1-6 includes 1,2,3,4,5 and 6.
According to the present invention, the alkyl of the C1-C4 can include but is not limited to：Methyl, ethyl, n-propyl, isopropyl, just
Butyl, sec-butyl, isobutyl group and the tert-butyl group.
According to the present invention, the alkylidene of the C1-C14 can be straight or branched, and the alkylidene of the C1-C14 can
To include but is not limited to：Methylene, ethylidene, sub- n-propyl, isopropylidene, sub- normal-butyl, sub- sec-butyl, isobutylidene, Asia
The tert-butyl group, sub- n-pentyl, isoamylidene, sub- tertiary pentyl, sub- neopentyl, sub- n-hexyl, sub- n-heptyl, sub- n-octyl, sub- positive nonyl
Base, sub- positive decyl, sub- positive hendecyl, sub- positive dodecyl, sub- positive tritriacontyl and sub- positive tetradecyl, preferably methylene.The Asia
Alkyl refers to that alkane loses the residue after two hydrogen atoms, and described two hydrogen atoms can be two hydrogen on same carbon atom
Atom, two hydrogen atoms that can also be on different carbon atoms can be straight chain or side chain, for example, the sub- second
Base can be-CH2CH2- or-CH (CH3)-。
First aspect, the invention provides a kind of polymer with selective water plugging function, the polymer contains structure
Unit A, construction unit B and construction unit C, wherein, the construction unit A is the construction unit with structure shown in formula (1), institute
It is the construction unit with structure shown in formula (2) to state construction unit B, and the construction unit C is the knot with structure shown in formula (3)
Structure unit；Wherein, on the basis of the weight of the polymer, the content of the construction unit A is 30-90 weight %, the knot
The content of structure unit B is that 5-50 weight %, the construction unit C content are 1-30 weight %, and the expansion of the polymer is again
Number is 75-110；
Wherein, R1And R2It is each independently H or C1-C4 alkyl；R3For C1-C14 alkylidene；R4And R5It is each independent
Ground is H or C1-C4 alkyl, and R4And R5It is asynchronously H；M is H, Na or K；R6For H or C1-C4 alkyl；T is the whole of 1-8
Number, p are 1-10 integer, and n is 1-6 integer.
Preferably, on the basis of the weight of the polymer, the content of the construction unit A is 40-85 weight %, described
Construction unit B content is that 10-40 weight %, the construction unit C content are 5-20 weight %, and the expansion of the polymer
Multiple is 80-100.
In the present invention, before weight and polymer absorption that the expansion multiple of polymer is polymer absorption after complete
Ratio between weight.
According to the present invention, under the first preferable case, in structure shown in the construction unit of structure shown in formula (1), formula (2)
Construction unit and formula (3) shown in structure construction unit in, R1And R2It is each independently H, methyl, ethyl, n-propyl, different
Propyl group, normal-butyl；R3For methylene, ethylidene, sub- n-propyl, sub- normal-butyl, sub- n-pentyl, sub- n-hexyl；R4And R5Each solely
It is on the spot H, methyl, ethyl, n-propyl, isopropyl, normal-butyl, and R4And R5It is asynchronously H；M is H, Na or K；R6For H, first
Base, ethyl, n-propyl, isopropyl, normal-butyl；T is 1-6 integer, and p is 1-8 integer, and n is 1-6 integer.
According to the present invention, under second of preferable case, in structure shown in the construction unit of structure shown in formula (1), formula (2)
Construction unit and formula (3) shown in structure construction unit in, R1And R2It is each independently H, methyl, ethyl, n-propyl；R3
For methylene, ethylidene, sub- n-propyl, sub- normal-butyl；R4And R5It is each independently H, methyl, ethyl, n-propyl, and R4With
R5It is asynchronously H；M is Na or K；R6For H, methyl, ethyl, n-propyl；T is 1-5 integer, and p is 2-6 integer, and n is 1-5's
Integer.
According to the present invention, under the third preferable case, in structure shown in the construction unit of structure shown in formula (1), formula (2)
Construction unit and formula (3) shown in structure construction unit in, R1And R2It is each independently H, methyl；R3For methylene；R4With
R5It is each independently H, methyl, ethyl, and R4And R5It is asynchronously H；M is Na or K；R6For H, methyl, ethyl；T is 2-4's
Integer, p are 3-5 integer, and n is 1-4 integer.
The present inventor has found under study for action, by following specific construction unit A, construction unit B and construction unit C
The selectivity of the water blockoff function of the polymer of composition is higher.The construction unit A is the structure list with structure shown in formula (7)
Member, the construction unit B is the construction unit with structure shown in formula (8), and the construction unit C is with formula (9) institute
Show the construction unit of structure,
Wherein, n is 1-4 integer.
Second aspect, the invention provides a kind of method for preparing the polymer with selective water plugging function, this method
Including：In the presence of initiator, crosslinking agent and as the water of solvent, make monomer D, monomer E and monomer F progress polymerisation in solutions anti-
Should, wherein, the monomer D is the monomer with structure shown in formula (4), and the monomer E is the list with structure shown in formula (5)
Body, the monomer F are the monomer with structure shown in formula (6), wherein, the monomer D, monomer E and monomer F dosage to make
Construction unit A content is that 30-90 weight %, construction unit B content are 5-50 weight % in standby obtained polymer, structure
Unit C content is 1-30 weight %, and the expansion multiple for the polymer for be prepared is 75-110；The structure list
First A is the construction unit with structure shown in formula (1), and the construction unit B is the construction unit with structure shown in formula (2),
The construction unit C is the construction unit with structure shown in formula (3),
Wherein, R1And R2It is each independently H or C1-C4 alkyl；R3For C1-C14 alkylidene；R4And R5It is each independent
Ground is H or C1-C4 alkyl, and R4And R5It is asynchronously H；M is H, Na or K；R6For H or C1-C4 alkyl；T is the whole of 1-8
Number, p are 1-10 integer, and n is 1-6 integer.
The monomer F can be commercially available or synthesize to obtain using the method for prior art.For example, the present invention
The monomer F that embodiment part uses is all from commercially available.And the preparation of the present invention has the polymerization of selective water plugging function
The polymerisation being related in the method for thing is carried out using random copolymerization mode.
In the present invention, the construction unit of structure shown in the formula (1), the construction unit of structure shown in formula (2), formula (3)
The list of the monomer of structure shown in the construction unit of shown structure, formula (4), the monomer of structure shown in formula (5) and structure shown in formula (6)
The related definition and substance classes of substituent in body are identical with the correspondence noted earlier of the present invention, and the present invention is no longer superfluous herein
State, those skilled in the art should not be construed as the limitation to technical scheme.
In the present invention, it is necessary to which explanation, the one body approximation are fully converted to the polymerization for having selective water plugging function
The corresponding construction unit that thing contains, the dosage of the monomer contain corresponding to the polymer of the tool selective water plugging function
The content of construction unit can be with consistent.
Preferably, the monomer D, monomer E and monomer F dosage cause construction unit A in the polymer that is prepared
Content is that 40-85 weight %, construction unit B content are that 10-40 weight %, construction unit C content is 5-20 weight %, with
And the expansion multiple for the polymer for be prepared is 80-100.
Preferably, monomer D, monomer E and monomer F are formed into the aqueous solution in presence of water；It is further preferred that in the water
In solution, monomer D, monomer E and monomer F total concentration are 20-40 weight %.
The method according to the invention, the solution polymerization are preferably carried out under conditions of pH value is 6-10.The pH
Value can be obtained by adding pH value regulator into polymerization system, and the pH value regulator can be the various of this area routine
PH value regulator, such as can be at least one of sodium hydroxide, sodium carbonate, potassium carbonate and ammoniacal liquor, preferably sodium hydroxide
And/or sodium carbonate.
The method according to the invention, adding chelating agent can prevent metal ion from being had an impact to polymerisation, therefore, excellent
In the case of choosing, the solution polymerization is carried out in the presence of chelating agent.The chelating agent can be ethylenediamine tetra-acetic acid two
Sodium, aminotriacetic acid or ammonium citrate, preferably disodium ethylene diamine tetraacetate.The present invention is to the dosage of the chelating agent without spy
Other restriction, it can be changed in wider scope, on the basis of the monomer D, the monomer E and the monomer F total amount,
The dosage of the chelating agent can be 0.01-0.1 weight %.
The crosslinking agent is preferably N, N'- methylene-bisacrylamides, the N, the dosage of N'- methylene-bisacrylamides
For the 0.02-0.1 weight % of monomer D, monomer E and monomer F total dosage.
The solution polymerization of the present invention is carried out in the presence of being additionally included in tetramethylethylenediamine, the tetramethyl second
The dosage of diamines is the 0.02-0.2 weight % of monomer D, monomer E and monomer F total dosage.
The solution polymerization can also be carried out in the presence of protective gas, and the protective gas preferably can be nitrogen
Gas.
It is polymeric colloid by the product mixtures obtained after the solution polymerization, it is of the present invention in order to obtain
The polymer end product with selective water plugging function, method of the invention can also include carrying out the polymeric colloid of acquisition
It is granulated, dry, crush, obtains the polymer end product with selective water plugging function after screening.
Preferably, the monomer D is the monomer with structure shown in formula (10)；The monomer E is with formula (11) Suo Shi
The monomer of structure；The monomer F is the monomer with structure shown in formula (12),
Wherein, n is 1-4 integer.
Preferably, the condition of the solution polymerization includes：Temperature is 0-30 DEG C, preferably 0-20 DEG C；Time is 2-
15h, preferably 5-10h.
Preferably, the initiator includes azo-initiator, peroxide type initiators and redox type initiators
At least one of；The azo-initiator is selected from azo-bis-iso-dimethyl, azo-bis-isobutyrate hydrochloride, azo two
Formamide, azo dicyclohexyl formonitrile HCN hydrochloride, azo isobutyl cyano group formamide, azo diisopropyl imidazoline hydrochloride, azo dicyan
At least one in base valeric acid, azo dicyclohexyl formonitrile HCN, azodiisobutyronitrile, AMBN and ABVN
Kind；The peroxide type initiators be selected from hydrogen peroxide, ammonium persulfate, sodium peroxydisulfate, potassium peroxydisulfate, benzoyl peroxide and
At least one of benzoyl peroxide tert-butyl ester；The redox type initiators are selected from persulfate-sulphite, over cure
At least one of hydrochlorate-thiocarbamide, persulfate-organic salt and ammonium persulfate-fatty amine.
Preferably, the initiator is redox type initiators；It is further preferred that the redox type initiators are
The oxidation-reduction trigger system being made up of persulfate oxidation agent and sulfite reducing agent.Under the preferable case, persulfuric acid
The dosage of salt oxidizing agent is the 0.01-0.1 weight % of monomer D, monomer E and monomer F total dosage；The use of sulfite reducing agent
Measure the 0.005-0.05% of total dosage for monomer D, monomer E and monomer F.For example, the oxygen in the redox type initiators
Agent can be 0.2 weight % persulfate aqueous solution and/or 0.2 weight % ammonium persulfate aqueous solution；The oxidation is also
Reducing agent in former class initiator can be 0.1 weight % bisulfite aqueous solutions of potassium and/or 0.1 weight % bisulfite
Sodium water solution.
According to a kind of preferred embodiment, the preparation method bag of the polymer with selective water plugging function
Include following steps：
1st step：Monomer D, monomer E and monomer F are added in polymerisation bottle and are configured to the aqueous solution, the water is adjusted with alkali
The pH value of solution is 6-10；
2nd step：Chelating agent, crosslinking agent and tetramethylethylenediamine are added into the aqueous solution of the 1st step, is stirred；
3rd step：At a temperature of 0-30 DEG C, after blasting nitrogen 5-60min, initiator is added into the aqueous solution of the 2nd step, and
And after blasting nitrogen and making it well mixed, sealing polymerization 2-15h obtains polymeric colloid；
4th step：Take out colloid be granulated, dried again, being crushed, sieve after obtain the polymerization with selective water plugging function
Thing finished product.
The third aspect, the invention provides the polymer with selective water plugging function being prepared by preceding method.
Fourth aspect, the invention provides the foregoing polymer with selective water plugging function alternatively property water shutoff agent
Using.
In the above-mentioned polymer with selective water plugging the function alternatively application of property water shutoff agent, specific application side
The technology that method is well known to those skilled in the art.
Described polymer with selective water plugging function of the present invention and its preparation method and application is with following specific
The advantages of：
1) by introducing a kind of styrene type zwitterionic monomer in acrylamide copolymer, water shutoff agent is considerably increased
The temperature-resistant anti-salt performance of material, while also significantly increase the expansion multiple of material；
2) polymer beads that the present invention is prepared first are swelled in the NaCl aqueous solution containing 10 weight %,
Being sufficiently stirred makes it be uniformly suspended in system, is pressed into through injection pump at producing well in stratigraphic oil pool, suspension micelle meets stratum
Water can further expand, and block aqueous phase path, substantially reduce water phase permeability；Suspension micelle, which runs into oil phase, to be shunk, and enter
And the oil/water selectivity of water shutoff material is significantly improved, reach the effect that water blockoff does not block up oil, be that inefficient well creates beneficial synergy under low oil price
Facility is provided, improving oil well productivity for ultra-high water cut stage provides technical support.
The present invention will be described in detail by way of examples below.
Zwitterionic monomer used below is purchased from Aladdin reagent (Shanghai) Co., Ltd..
In following examples, the method for testing being related to is as follows：
Sealing ratiod be on core flow test device according to《Drilling fluid bridge joint loss circulation material Experimental Method in Laboratory》SY/
Sealing ratiod testing procedure in T5840-2007 is carried out.Specifically：
The measure of water plugging rate：Artificial core is loaded into core holding unit, first with water saturation, surveys its water phase permeability (Kw1),
Then 10mL water shutoff agent is squeezed into, after conserving 24h at 80 DEG C, then the permeability (K that it is added after water shutoff agent with aquametryw2),
Kw2And Kw1Ratio (Kw2/Kw1) it is water plugging rate.
The measure of oil plugging rate：Artificial core is loaded into core holding unit, first with oily saturation, surveys its oleic permeability (Ko1),
Then 10mL water shutoff agent is squeezed into, after conserving 24h at 80 DEG C, then the permeability (K that it is added after water shutoff agent with oil measureo2),
Ko2And Ko1(Ko2/Ko1) it is oil plugging rate.
Wherein, artificial core is by the way that the quartz sand of 40-60 mesh is tamped to obtain in a mold.
Embodiment 1：Prepare the polymer with selective water plugging function
1st, by 14.0g acrylamides (the 70 weight % for accounting for monomer total amount), 2.0g formula (11) shown in 2- acrylamides
Zwitterionic monomer (wherein, n shown in base -2- methyl propane sulfonic acids (the 10 weight % for accounting for monomer total amount) and 4.0g formula (12)
=1, account for 20 weight % of monomer total amount) be added in insulation polymerisation bottle (i.e. polymerization bottle), it is molten to add deionized water 60.0g
Solution is made into the aqueous solution, and it is 7.0 to add sodium hydroxide regulation pH；
2nd, 1 weight % EDTA-2Na aqueous solution 1.0g, N, N'- methylene-bisacrylamide 10mg, tetramethyl are sequentially added
Base ethylenediamine 10.0mg, stirs；
3rd, the temperature of the aqueous solution is controlled to lead to nitrogen flooding oxygen at 5 DEG C after 20 minutes, add 0.2 weight % potassium peroxydisulfate
Aqueous solution 2.0g and 0.1 weight % aqueous solution of sodium bisulfite 2.0g, initiation reaction, stop after continuing logical nitrogen 5min, it is close
Polymerisation of being honored as a queen 6 hours；
4th, taking-up blob of viscose is granulated, drying to constant weight, crushing, sieving obtains white granular selective water plugging at 60 DEG C
Polymer samples.
Test result：The water plugging rate of polymer samples is 93.4%, oil plugging rate 10.0%, expansion multiple 100.3.This
Illustrate that the selective blocking aqueous polymer that the present embodiment is prepared has significant selective shut-off rate to oil/water.
Embodiment 2：Prepare the polymer with selective water plugging function
1st, by 13.0g acrylamides (the 65 weight % for accounting for monomer total amount), 4.0g formula (11) shown in 2- acrylamides
Zwitterionic monomer (wherein, n shown in base -2- methyl propane sulfonic acids (the 20 weight % for accounting for monomer total amount) and 3.0g formula (12)
=2, account for 15 weight % of monomer total amount) be added in insulation polymerisation bottle (i.e. polymerization bottle), it is molten to add deionized water 60.0g
Solution is made into the aqueous solution, and it is 6.5 to add sodium hydroxide regulation pH；
2nd, 1 weight % EDTA-2Na aqueous solution 1.0g, N, N'- methylene-bisacrylamide 4.0mg, tetramethyl are sequentially added
Base ethylenediamine 10.0mg, stirs；
3rd, the temperature of the aqueous solution is controlled to lead to nitrogen flooding oxygen at 0 DEG C after 20 minutes, add 0.2 weight % potassium peroxydisulfate
Aqueous solution 3.0g and 0.1 weight % aqueous solution of sodium bisulfite 3.0g, initiation reaction, stop after continuing logical nitrogen 5min, it is close
Polymerisation of being honored as a queen 8 hours；
4th, taking-up blob of viscose is granulated, drying to constant weight, crushing, sieving obtains white granular selective water plugging at 60 DEG C
Polymer samples.
Test result：The water plugging rate of polymer samples is 95.2%, oil plugging rate 9.9%, expansion multiple 99.8.This says
The selective blocking aqueous polymer that bright the present embodiment is prepared has significant selective shut-off rate to oil/water.
Embodiment 3：Prepare the polymer with selective water plugging function
1st, by 11.0g acrylamides (the 55 weight % for accounting for monomer total amount), 8.0g formula (11) shown in 2- acrylamides
Zwitterionic monomer (wherein, n shown in base -2- methyl propane sulfonic acids (the 40 weight % for accounting for monomer total amount) and 1.0g formula (12)
=3, account for 5 weight % of monomer total amount) be added in insulation polymerisation bottle (i.e. polymerization bottle), it is molten to add deionized water 60.0g
Solution is made into the aqueous solution, and it is 8.0 to add sodium hydroxide regulation pH；
2nd, 1 weight % EDTA-2Na aqueous solution 1.0g, N, N'- methylene-bisacrylamide 20.0mg is sequentially added, four
Methyl ethylenediamine 10.0mg, stirs；
3rd, the temperature of the aqueous solution is controlled to lead to nitrogen flooding oxygen at 10 DEG C after 20 minutes, add 0.2 weight % potassium peroxydisulfate
Aqueous solution 4.0g and 0.1 weight % aqueous solution of sodium bisulfite 4.0g, initiation reaction, stop after continuing logical nitrogen 5min, it is close
Polymerisation of being honored as a queen 7 hours；
4th, taking-up blob of viscose is granulated, drying to constant weight, crushing, sieving obtains white granular selective water plugging at 60 DEG C
Polymer samples.
Test result：The water plugging rate of polymer samples is 92.3%, oil plugging rate 11.1%, expansion multiple 99.5.This
Illustrate that the selective blocking aqueous polymer that the present embodiment is prepared has significant selective shut-off rate to oil/water.
Embodiment 4：Prepare the polymer with selective water plugging function
1st, by 12.0g acrylamides (the 60 weight % for accounting for monomer total amount), 6.0g formula (11) shown in 2- acrylamides
Zwitterionic monomer (wherein, n shown in base -2- methyl propane sulfonic acids (the 30 weight % for accounting for monomer total amount) and 2.0g formula (12)
=4, account for 10 weight % of monomer total amount) be added in insulation polymerisation bottle (i.e. polymerization bottle), it is molten to add deionized water 60.0g
Solution is made into the aqueous solution, and it is 7.0 to add sodium hydroxide regulation pH；
2nd, 1 weight % EDTA-2Na aqueous solution 1.0g, N, N'- methylene-bisacrylamide 6.0mg, tetramethyl are sequentially added
Base ethylenediamine 10.0mg, stirs；
3rd, the temperature of the aqueous solution is controlled to lead to nitrogen flooding oxygen at 0 DEG C after 20 minutes, add 0.2 weight % potassium peroxydisulfate
Aqueous solution 3.0g and 0.1 weight % aqueous solution of sodium bisulfite 3.0g, initiation reaction, stop after continuing logical nitrogen 5min, it is close
Polymerisation of being honored as a queen 8 hours；
4th, taking-up blob of viscose is granulated, drying to constant weight, crushing, sieving obtains white granular selective water plugging at 60 DEG C
Polymer samples.
Test result：The water plugging rate of polymer samples is 96.8%, oil plugging rate 7.9%, expansion multiple 99.3.This says
The selective blocking aqueous polymer that bright the present embodiment is prepared has significant selective shut-off rate to oil/water.
Embodiment 5：Prepare the polymer with selective water plugging function
The present embodiment is carried out using method similar to Example 1, except that：
The usage amount of monomer in the present embodiment is different, and specifically, the dosage of acrylamide (accounts for monomer total amount for 13g
65 weight %), the dosage of the 2- acrylamide-2-methylpro panesulfonic acids shown in formula (11) (accounts for 32 weights of monomer total amount for 6.4g
Measure %), the dosage of the zwitterionic monomer (wherein, n=1, accounting for 3 weight % of monomer total amount) shown in formula (12) is 0.6g.
Remaining is in the same manner as in Example 1, obtains white granular selective water plugging polymer samples.
Test result：The water plugging rate of polymer samples is 91.6%, oil plugging rate 18.4%, expansion multiple 93.1.This
Illustrate that the selective blocking aqueous polymer that the present embodiment is prepared has significant selective shut-off rate to oil/water.
Embodiment 6：Prepare the polymer with selective water plugging function
The present embodiment is carried out using method similar to Example 1, except that：
The usage amount of monomer in the present embodiment is different, and specifically, the dosage of acrylamide (accounts for monomer total amount for 10g
50 weight %), the dosage of the 2- acrylamide-2-methylpro panesulfonic acids shown in formula (11) (accounts for 25 weights of monomer total amount for 5g
Measure %), the dosage of the zwitterionic monomer (wherein, n=1, accounting for 25 weight % of monomer total amount) shown in formula (12) is 5g.
Remaining is in the same manner as in Example 1, obtains white granular selective water plugging polymer samples.
Test result：The water plugging rate of polymer samples is 90.3%, oil plugging rate 18.2%, expansion multiple 94.3.This
Illustrate that the selective blocking aqueous polymer that the present embodiment is prepared has significant selective shut-off rate to oil/water.
Comparative example 1
This comparative example is carried out using method similar to Example 1, except that, formula (12) is added without in this comparative example
Shown zwitterionic monomer, and the dosage of the 2- acrylamide-2-methylpro panesulfonic acids shown in adjustment type (11) is 6.0g.
Specifically：
1st, by 14.0g acrylamides (the 70 weight % for accounting for monomer total amount), 6.0g 2- acrylamido -2- methyl-prop sulphurs
Sour (the 30 weight % for accounting for monomer total amount) are added in insulation polymerisation bottle (i.e. polymerization bottle), and it is molten to add deionized water 60.0g
Solution is made into the aqueous solution, and it is 7.0 to add sodium hydroxide regulation pH value；
2nd, 1 weight % EDTA-2Na aqueous solution 1.0g, N, N'- methylene-bisacrylamide 10mg, tetramethyl are sequentially added
Base ethylenediamine 10.0mg, stirs；
3rd, the temperature of the aqueous solution is controlled to lead to nitrogen flooding oxygen at 5 DEG C after 20 minutes, add 0.2 weight % potassium peroxydisulfate
Aqueous solution 2.0g and 0.1 weight % aqueous solution of sodium bisulfite 2.0g, initiation reaction, stop after continuing logical nitrogen 5min, it is close
Polymerisation of being honored as a queen 6 hours；
4th, taking-up blob of viscose is granulated, drying to constant weight, crushing, sieving obtains white granular polymer-like at 60 DEG C
Product.
Test result：The water plugging rate of polymer samples is 80.9%, oil plugging rate 65.8%, expansion multiple 65.2.This
Illustrate that the polymer that this comparative example is prepared is not high to the selectivity of the sealing ratiod of oil/water.
There is selection using what the method for the present invention was prepared it can be seen from the result of above-described embodiment and comparative example
There is the polymer of property water blockoff function excellent selective water plugging not block up oily function.
The preferred embodiment of the present invention described in detail above, still, the present invention are not limited in above-mentioned embodiment
Detail, in the range of the technology design of the present invention, a variety of simple variants can be carried out to technical scheme, this
A little simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (11)
1. a kind of polymer with selective water plugging function, it is characterised in that the polymer contains construction unit A, structure list
First B and construction unit C, wherein, the construction unit A is the construction unit with structure shown in formula (1), the construction unit B
For the construction unit with structure shown in formula (2), the construction unit C is the construction unit with structure shown in formula (3)；Its
In, on the basis of the weight of the polymer, the content of the construction unit A is 30-90 weight %, the construction unit B's
Content is that 5-50 weight %, the construction unit C content are 1-30 weight %, and the expansion multiple of the polymer is 75-
110；
Wherein, R1And R2It is each independently H or C1-C4 alkyl；R3For C1-C14 alkylidene；R4And R5It is each independently
H or C1-C4 alkyl, and R4And R5It is asynchronously H；M is H, Na or K；R6For H or C1-C4 alkyl；T be 1-8 integer, p
For 1-10 integer, n is 1-6 integer.
2. polymer according to claim 1, wherein, on the basis of the weight of the polymer, the construction unit A's
Content is that 40-85 weight %, the construction unit B content are that 10-40 weight %, construction unit C content is 5-20
Weight %, and the expansion multiple of the polymer is 80-100.
3. polymer according to claim 1 or 2, wherein, the construction unit A is the knot with structure shown in formula (7)
Structure unit, the construction unit B is the construction unit with structure shown in formula (8), and the construction unit C is with formula
(9) construction unit of structure shown in,
Wherein, n is 1-4 integer.
4. a kind of method for preparing the polymer with selective water plugging function, this method include：In initiator, crosslinking agent and work
In the presence of the water of solvent, monomer D, monomer E and monomer F is carried out solution polymerization, wherein, the monomer D be with
The monomer of structure shown in formula (4), the monomer E are the monomer with structure shown in formula (5), and the monomer F is with formula (6) institute
Show the monomer of structure, wherein, the monomer D, monomer E and monomer F dosage cause construction unit A in the polymer that is prepared
Content be that 30-90 weight %, construction unit B content is that 5-50 weight %, construction unit C content is 1-30 weight %,
And the expansion multiple for the polymer for be prepared is 75-110；The construction unit A is with structure shown in formula (1)
Construction unit, the construction unit B are the construction unit with structure shown in formula (2), and the construction unit C is with formula (3)
The construction unit of shown structure,
Wherein, R1And R2It is each independently H or C1-C4 alkyl；R3For C1-C14 alkylidene；R4And R5It is each independently
H or C1-C4 alkyl, and R4And R5It is asynchronously H；M is H, Na or K；R6For H or C1-C4 alkyl；T be 1-8 integer, p
For 1-10 integer, n is 1-6 integer.
5. according to the method for claim 4, wherein, the monomer D, monomer E and monomer F dosage cause what is be prepared
Construction unit A content is that 40-85 weight %, construction unit B content are 10-40 weight % in polymer, construction unit C's
Content is 5-20 weight %, and the expansion multiple for the polymer for be prepared is 80-100.
6. the method according to claim 4 or 5, wherein, the crosslinking agent is N, and N'- methylene-bisacrylamides are described
The dosage of N, N'- methylene-bisacrylamide is the 0.02-0.1 weight % of monomer D, monomer E and monomer F total dosage.
7. according to the method described in any one in claim 4-6, wherein, the monomer D is with structure shown in formula (10)
Monomer；The monomer E is the monomer with structure shown in formula (11)；The monomer F is the list with structure shown in formula (12)
Body,
Wherein, n is 1-4 integer.
8. according to the method described in any one in claim 4-7, wherein, the condition of the solution polymerization includes：Temperature
Spend for 0-30 DEG C, preferably 0-20 DEG C；Time is 2-15h, preferably 5-10h.
9. according to the method described in any one in claim 4-7, wherein, the initiator includes azo-initiator, mistake
At least one of oxide-based initiator and redox type initiators；The azo-initiator is selected from the isobutyric acid of azo two
Dimethyl ester, azo-bis-isobutyrate hydrochloride, azodicarbonamide, azo dicyclohexyl formonitrile HCN hydrochloride, azo isobutyl cyano group
Formamide, azo diisopropyl imidazoline hydrochloride, azo dicyano valeric acid, azo dicyclohexyl formonitrile HCN, azodiisobutyronitrile, azo two
At least one of isobutyl cyanide and ABVN；The peroxide type initiators are selected from hydrogen peroxide, ammonium persulfate, mistake
At least one of sodium sulphate, potassium peroxydisulfate, benzoyl peroxide and benzoyl peroxide tert-butyl ester；The redox class is drawn
Agent is sent out in persulfate-sulphite, persulfate-thiocarbamide, persulfate-organic salt and ammonium persulfate-fatty amine
It is at least one.
10. the polymer with selective water plugging function that the method in claim 4-9 described in any one is prepared.
11. the polymer with selective water plugging function in claim 1-3 and 10 described in any one alternatively block up by property
The application of aqua.
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