CN106589226A - Profile controlling and flooding composition and application thereof - Google Patents
Profile controlling and flooding composition and application thereof Download PDFInfo
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- CN106589226A CN106589226A CN201510683173.2A CN201510683173A CN106589226A CN 106589226 A CN106589226 A CN 106589226A CN 201510683173 A CN201510683173 A CN 201510683173A CN 106589226 A CN106589226 A CN 106589226A
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Classifications
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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
- C08F2/32—Polymerisation in water-in-oil emulsions
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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
- C09K8/584—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 surfactants
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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
Abstract
The invention relates to a profile controlling and flooding composition of a high-temperature, high-salinity and low-permeability oil reservoir and application thereof in tertiary oil recovery of the high-temperature, high-salinity and low-permeability oil reservoir. The profile controlling and flooding composition aims at solving the problems that in the prior art, the heat resistant and salt resistant performance of an oil-displacing agent are poor and the flushing efficiency is low under the condition of the high-temperature, high-salinity and low-permeability oil reservoir. According to the technical scheme, the profile controlling and flooding composition of the high-temperature, high-salinity and low-permeability oil reservoir comprises, by weight, 0.01-3.0% of temperature and salt resistant polyacrylamide microspheres, 0.01-5.0% of anionic-nonionic surface active agent, and 92.0-99.98% of injected water, the problems are favorably solved, and the profile controlling and flooding composition can be used for on-spot application of oil recovery enhancement of deep profile controlling, water plugging, reservoir oil displacing and the like used in the tertiary oil recovery of the high-temperature, high-salinity and low-permeability oil reservoir.
Description
Technical field
The present invention relates to a kind of transfer drive composition and its application, particularly a kind of transfer drive group of high temperature and high salt LOW PERMEABILITY RESERVOIR
Compound and its application in high temperature and high salt LOW PERMEABILITY RESERVOIR tertiary oil recovery.
Background technology
With the development of social economy, people to oil demand amount be continuously increased and petroleum reserves reduction, oil
Just becoming more and more valuable as non-renewable resource.Problems faced has one：Imbalance between supply and demand is projected, and oil is needed
The amount of asking is increasing, and new oil field is fewer and feweri；Two：It is also left in depleted reservoirs to have substantial oil.Primary oil recovery (POR)
Can produce 10～25% underground crude oils, secondary oil recovery (SOR) can produce 15～25% underground crude oils, i.e. primary oil recovery and
Secondary oil recovery only produces 25～50% underground crude oils.In order to ensure that oil is supplied steadily in the long term, meets human wants,
Necessary research and development improves petroleum recovery technology, and tertiary oil recovery (EOR) can make crude oil by intensified oil reduction measure
Recovery ratio improves again 6～20%, even more many.
Polymer flooding is the main technique methods of tertiary oil recovery, and mechanism of oil displacement understands that technique is relatively easy, technology day
Become ripe, be one and effectively improve recovery efficiency technique measure.But for inhomogeneous formation, displacement is only capable of effect
In high permeability zone, involve the less permeable layer less than oil-containing, this recovery ratio for having resulted in crude oil is reduced, cost
Raise.Inhomogeneous formation is generally directed to frequently with Profile Control in Injection Well and producing well water-plugging technique, but this technology is effective
Scope is only limitted near wellbore zone, it is impossible to be deep into well deep part, does not reach the purpose for increasing substantially oil recovery factor.
Inverse emulsion polymerization is that to adopt continuous phase for oil phase, dispersion phase be water phase, using surfactant by monomer water
Solution segmentation surrounds into the method for several reaction microcells preparing water-soluble microgel polymer.Using reversed-phase emulsion
Polymerization obtains receiving the cross-linked polymer microsphere of micron-scale and can be used for waterflooding reservoir deep profile correction material step by step, its
Use principle is that using receiving the polymer microballoon of micron-scale, original dimension is much smaller than formation pore throat size, with injection
Water can smoothly enter earth formation deep, constantly migrate forward in the earth formation, absorb water after progressively expanding in penetrating passage
Closure is formed at pore throat, causes liquid stream to alter course, realize expanding water swept volume, improve the purpose of oil recovery factor.
Recent domestic researcher is in terms of reversed phase latex of polyacrylamide microballoon is used for oil deposit deep part transfer drive material
Existing more research, and achieve preferably progress and achievement.Patent CN102399345A is poly- using reversed-phase emulsion
Conjunction is prepared for a kind of emulsion deep profile control agent containing core shell structure gel micro-ball, and emulsion active constituent content is high, but
It is higher active constituent content so that the profile control agent easy profit layering during long storage time, affects transfer drive
Effect, and repeatedly charging technology is complicated, reacts wayward.Patent CN1927895A is using reversed-phase emulsion heat
Polymerization is prepared for a kind of water-soluble microgel reservoir oil material, simple to operate, and the emulsion of preparation is also more stable, but
Expansion character of the profile control agent under high temperature and high salinity reservoir condition is evaluated, so profile modification is more had no way of
Textual criticism.Though inverse emulsion polymerization existing pertinent literature report (Wang Zhonghua, the hyperbranched inverse emulsion polymerization of drilling fluid
The synthesis of thing and its performance, Drilling and completion fluids, the 3rd phase of volume 31 in 2014), but it is oil that it is mainly applied
Field polymer filtrate reducer, although its active constituent content higher (﹥ 29%), but due to its poor fluidity (instead
The aqueous solution apparent viscosity of phase emulsion polymer is up to 66～71mPas) so that it is deposited during oil field practice application
In the problem that injection is difficult.
The content of the invention
One of the technical problem to be solved is the hypotonic condition of high temperature and high salt that oil displacement agent is present in prior art
A kind of problem that lower temperature-resistant anti-salt performance is poor, oil displacement efficiency is low, there is provided transfer drive composition of high temperature and high salt LOW PERMEABILITY RESERVOIR.
Said composition has the characteristics of temperature-resistant anti-salt performance is good, and oil displacement efficiency is high.
The two of the technical problem to be solved are that one of above-mentioned technical problem transfer drive composition is high in high temperature
Application in salt LOW PERMEABILITY RESERVOIR tertiary oil recovery.
To solve one of above-mentioned technical problem, technical scheme is as follows：The transfer drive of high temperature and high salt LOW PERMEABILITY RESERVOIR
Composition, by weight percentage including following component：
(1) 0.01～3.0% temperature-tolerant anti-salt polyacrylamide microballoon；
(2) 0.01～5.0% anion-nonionic surfactant；
(3) 92.0～99.98% injection water.
In above-mentioned technical proposal, the total salinity of described injection water be preferably 80000～180000mg/L,
Ca2++Mg2+Preferably 1000～5000mg/L.
In above-mentioned technical proposal, the described preferred general molecular formula of anion-nonionic surfactant is
RO(CH2CH2O)nCH2SO3M, R are preferably C10～C25Alkyl, preferred n=1～20, M be preferably selected from H,
Alkali metal or NH4。
In above-mentioned technical proposal, R is preferably C12～C18Alkyl.
In above-mentioned technical proposal, preferred n=2～8.
In above-mentioned technical proposal, the alkali metal preferably is selected from potassium, sodium or lithium.
In above-mentioned technical proposal, the temperature-tolerant anti-salt polyacrylamide microballoon is preferably in redox composite initiator
Under effect, by obtained in the aggregated reaction of reversed-phase emulsion；Described reversed-phase emulsion, in terms of parts by weight, comprising with
Lower component：
A) 50 parts of oil-dissolving solvent；
B) 2～15 parts of emulsifying agent；
C) 10～60 parts of water-soluble monomer A；
D) 0.5～15 part of temperature-resistant anti-salt monomer；The temperature-resistant anti-salt monomer selected from water-soluble temperature-resistant anti-salt monomer or
At least one in oil-soluble temperature-resistant anti-salt monomer；
E) 10～50 parts of water；
Wherein, the composite initiator, in terms of above-mentioned whole weight percent monomers, comprising following components：
The oxidant of (a) 0.02～1.0%；
The reducing agent of (b) 0.02～2.0%；
The azo compound of (c) 0.03～2.0%；
The crosslinking agent of (d) 0.01～1.0%；
The urea of (e) 0.1～10%, thiocarbamide；
The complexones of (f) 0.01～0.5%；
The electrolytic salt of (g) 0.5～5%.
The preferred ethylenediamine tetra-acetic acid of complexones described in above-mentioned technical proposal and its alkali metal salt, diethylenetriamine
Pentaacetic acid and its alkali metal salt.
Oil-dissolving solvent described in above-mentioned technical proposal preferably is selected from least one in hydrocarbon and ester.Described hydrocarbon can be
Aliphatic hydrocarbon, aromatic hydrocarbon, petroleum distillate；The preferred C of the aliphatic hydrocarbon4～C8Aliphatic hydrocarbon, for example thiacyclohexane, hexane,
Heptane, octane and isooctane etc.；The preferred C of described aromatic hydrocarbon6～C10Aromatic hydrocarbons, such as benzene,toluene,xylene,
Trimethylbenzene, ethylbenzene, diethylbenzene, isopropylbenzene etc.；The preferred white oil of described petroleum distillate, atoleine, gasoline,
Kerosene, diesel oil, petroleum ether etc..Described ester optimization acid's ester, it may be more preferable to C4～C8Monoesters, such as acetic acid
Ethyl ester, propyl acetate etc.；Can also more preferably C4～C10Dibasic acid esters, such as dimethyl oxalate, diethy-aceto oxalate, grass
Sour methyl ethyl ester etc.；Can also more preferably vegetable oil, vegetable oil preferably is selected from peanut oil, soybean oil, sunflower oil and castor
Sesame oil.
In above-mentioned technical proposal, the HLB value of the emulsifying agent is preferably 5～8.The emulsifying agent it is more preferably non-from
Sub- surfactant.The emulsifying agent is preferably by the nonionic surfactant that HLB is 1～7 and HLB8～18
Nonionic surfactant be re-dubbed the non-ionic surfactant mixture form that HLB is 5～8.It is described non-
Ionic surface active agent, such as fatty alcohol, alkyl phenol, aliphatic acid, the alkoxyl addition product of fatty acid ester or amine, example
Such as AEO, APES, polyoxyethylene carboxylate, aliphatic amine polyoxyethylene ether
Deng, then the product of the part of hydroxyl esterification of such as polyalcohol, such as sorbitan fatty acid ester, namely it is known
Spans, and the part of hydroxyl or whole hydroxyl-oxethyls and fatty acid ester compound of polyalcohol, such as Tweens.
In above-mentioned technical proposal, in the emulsifying agent assistant for emulsifying agent is can further include.The assistant for emulsifying agent can
Select small molecule alcohol.The preferred C of the small molecular alcohol3～C12Alcohol, such as isopropanol, the tert-butyl alcohol, n-amyl alcohol etc..
Assistant for emulsifying agent content preferably accounts for 5～30wt% of nonionic surfactant described in emulsifying agent.
In above-mentioned technical proposal, the preferred non-ionic monomer of the water-soluble monomer A, anionic monomer and cation mono
At least one in body；The nonionic water-soluble monomers preferably are selected from formula (1) or the monomer shown in formula (2)
At least one, wherein R1、R3And R4It is independently selected from as methyl or hydrogen, R2For C1～C3Alkyl or hydroxyl replace
Alkyl.For example, the monomer shown in formula (1) has acrylamide, Methacrylamide, ethyl acrylamide, N-
N-isopropylacrylamide, N hydroxymethyl acrylamide etc., the monomer shown in formula (2) have N- vinyl formamides,
N- vinyl acetamides etc..At least one of the anionic monomer in formula (3) to monomer shown in (6),
Wherein R5To R7It is independently selected from methyl or hydrogen, R8Selected from C1～C6Alkylidene, cycloalkylidene or phenylene, M,
Z, Y and T are independently selected from hydrogen, alkali metal or NH4, such as described anionic monomer has 2- acrylamido -2- first
Base propane sulfonic acid, acrylic acid, methacrylic acid, vinyl sulfonic acid, vinylbenzenesulfonic acid, allyl sulphonic acid and/or its
Water-soluble alkali, alkaline-earth metal and ammonium salt.The cationic monomer is selected from monomer, wherein R shown in formula (7)9
For methyl or hydrogen, R10For oxygen or NH groups, R11For C1～C4Alkylidene, R12～R14It is independently selected from C1～C3
Alkyl, X be selected from chlorine or bromine, as mentioned cationic monomer has acrylyl oxy-ethyl-trimethyl salmiac, first to example
Base acrylyl oxy-ethyl-trimethyl salmiac, 2- acrylamido -2- trimethoxysilyl propyl methacrylate ammonium chlorides etc..
In above-mentioned technical proposal, the water-soluble temperature-resistant anti-salt monomer preferably is selected from NVP, formula (8)
Monomer (such as acryloyl amine-n-shown in shown monomer (such as N, N- DMAA etc.) or formula (9)
Dodecyl sodium sulfate etc.) at least one, wherein R15And R18It is independently selected from hydrogen or methyl, R16And R17
It is independently selected from C1～C3Alkyl, R19For C8～C18Alkylidene, D be selected from hydrogen, alkali metal or NH4
CH2=CR15- CONR16R17, (8)；CH2=CR18- CONHR19SO3D (9)；
The oil-soluble temperature-resistant anti-salt monomer preferably is selected from the monomer (example shown in N-phenylmaleimide, formula (10)
Such as (methyl) dodecylacrylate etc.) or formula (11) shown in monomer (such as styrene, to the tert-butyl group
Styrene etc.) at least one, wherein R21For methyl or hydrogen, R22For C8～C18Alkyl or fluorine replace alkyl,
R20For hydrogen or C1～C4Alkyl；
CH2=CR21- COO-R22(10)；
In above-mentioned technical proposal, the oxidant preferably is selected from least in water-soluble oxidizers, oil insoluble oxidation agent
Plant, further preferably at least one from potassium peroxydisulfate, sodium peroxydisulfate, ammonium persulfate or benzoyl peroxide；
Reducing agent preferably is selected from least one in water-soluble reducing agent, oil-soluble reducing agent, further preferably from sodium sulfite,
Potassium sulfite, at least one in sodium hydrogensulfite, potassium bisulfite, sodium thiosulfate or frerrous chloride；It is described
At least one of the azo compound in water-soluble azo class compound, oil-soluble azo compound, it is described
Water-soluble azo class compound preferably is selected from azo diisobutyl amidine hydrochloride or 2,2'- azos [2- (2- imidazoline -2- bases) third
Alkane] at least one in dihydrochloride；The oil-soluble azo compound preferably is selected from azodiisobutyronitrile or azo two
At least one in different heptonitrile；The preferred ethylenediamine tetra-acetic acid of the complexones and its alkali metal salt, divinyl three
Triamine pentaacetic acid and its alkali metal salt；Crosslinking agent preferably is selected from least one in water-soluble cross-linker, oil-soluble crosslinking agent,
Further preferably from crosslinking agent (for example, N, N '-methylene-bisacrylamide), the formula (13) shown in formula (12)
Shown crosslinking agent (for example, polyethylene glycol two (methyl) acrylate), divinylbenzene, pentaerythrite 3 third
Olefin(e) acid ester, N, at least one in a N '-penylene BMI；Wherein R23、R24、R26And R27Independent choosing
From hydrogen or methyl, R25For C1～C3Alkylidene, m be formula (13) in EO construction units number, n be formula (13)
The number of middle PO construction units, m is 1～20 with n sums；Contain EO and PO simultaneously in structure (13)
EO and PO construction units can be block sequence, random sequence during construction unit；It is preferred that m is 5～15 and n
=0).
In above-mentioned technical proposal, the composite initiator in terms of above-mentioned whole weight percent monomers, is preferably also wrapped
Include 0.1%～1% part of molecular weight regulator, the molecular weight regulator preferably be selected from isopropanol, the tert-butyl alcohol, isobutanol,
Or at least one in dipropylene glycol, the propane diols construction unit in the dipropylene glycol can be 1,2
- propane diols or 1,3-PD, more preferably 1,2-PD.
Described electrolytic salt preferably water miscible inorganic salts or acylate.The inorganic salts preferred as alkali hydrochloric acid
Salt (such as sodium chloride, potassium chloride), alkali metal sulfates (such as sodium sulphate, potassium sulfate)；The acylate
Preferred as alkali acylate, more preferably C2～C6The alkali-metal salt of carboxylic acid, such as potassium acetate or sodium acetate.
In above-mentioned technical proposal, the temperature-tolerant anti-salt polyacrylamide microballoon is preferably using the method for comprising the steps
Prepare：
A () oil phase is prepared：The emulsifying agent is dissolved in 35～45 parts of oil-dissolving solvents, is stirred, obtained
To oil phase I；Oil-soluble temperature-resistant anti-salt monomer, oil-soluble crosslinking agent and oil-soluble azo initiator are dissolved in into surplus oil
In soluble solvent, stir, obtain oil phase II.
B () water is mutually prepared：By water-soluble monomer A, water-soluble temperature-resistant anti-salt monomer, water-soluble azo class compound,
Water-soluble cross-linker, urea, thiocarbamide, complexones and electrolytic salt are dissolved in 5～45 parts of water, stir,
Obtain water phase；Oxidant, reducing agent are dissolved in into respectively formation aqueous oxidizing agent solution and reducing agent in excess water water-soluble
Liquid；
C the oil phase I is added reactor by (), add the water phase and the oil phase II, is stirred, and is added successively
Enter the aqueous oxidizing agent solution, reducing agent aqueous solution, react 1～6 hour at 40～80 DEG C, obtain polyacrylamide
Amine reversed-phase emulsion.
Used as preferred technical scheme, above-mentioned steps (c) are as follows：
C the oil phase I is added reactor by (), add the water phase and the oil phase II, is stirred, and is added successively
Enter the aqueous oxidizing agent solution, reducing agent aqueous solution, react 3～5 hours at 50～60 DEG C, obtain polyacrylamide
Amine reversed-phase emulsion.
Transfer drive composition of the present invention is prepared and is not particularly limited, for example, may include steps of：Institute will be contained
The reversed-phase emulsion of the above-mentioned temperature-tolerant anti-salt polyacrylamide microballoon of requirement, described anion-nonionic surfactant and note
Enter water uniformly to mix, stir 1～3 hour.
In order to solve the two of above-mentioned technical problem, the technical solution used in the present invention is as follows：One of above-mentioned technical problem
Application of the described transfer drive composition in high temperature and high salt LOW PERMEABILITY RESERVOIR tertiary oil recovery.For example by the transfer drive composition
Note formation temperature >=80 DEG C (preferably 85～95 DEG C), total salinity >=80000mg/L (preferably 80000～
180000mg/L)、Ca2++Mg2+>=1000mg/L (preferably 1000～5000mg/L), air permeability
100～1500 × 10-3μm2(preferably 300～1000 × 10-3μm2) oil reservoir, by oily displacement out.
The polyacrylamide microsphere in transfer drive composition prepared by the present invention, due to introducing resistance in its molecular structure
Warm salt resistance monomer, not only can strengthen the heat and salt resistance of polymer, and it is solubilized and system steady to contribute to monomer
It is qualitative；Simultaneously as the method fed using a step so that the polymerization process of emulsion is simple to operate, reacting balance,
Gained emulsion viscosity is low, can for a long time keep stable under room temperature condition, thus obtained microsphere narrow diameter distribution, big I
Control, initial particle is 50nm～1 μm, and is expanded in high temperature and high salt water controllable.
Using the transfer drive method of the high temperature and high salt LOW PERMEABILITY RESERVOIR of the present invention, can be used for 85～95 DEG C of formation temperature, total ore deposit
Change degree is 80000～180000mg/L, Ca2++Mg2+Total amount is 1000～5000mg/L, air permeability is
300～1000 × 10-3μm2Zhongyuan Oil Field Pu Chengxi Districts crude oil and water, with consumption 0.1～0.2wt% pam microemulsions
Ball and 0.1～0.3wt% aliphatic alcohol polyoxyethylene sulfonates form above-mentioned composition, determine the said composition aqueous solution
With the dynamical interfacial tension value between the crude oil of Zhongyuan Oil Field Pu Chengxi Districts, up to 10-2～10-3The low interface of mN/m
Power, in being applied to the scene application for improving recovery ratio, it will play and improve well displacement efficiency and finally carry
The effect of high recovery rate.
Below by specific embodiment, the present invention will be further elaborated.
Specific embodiment
【Embodiment 1】
The polymer microballoon of the present embodiment, be redox composite initiator effect under, it is aggregated by reversed-phase emulsion
Reaction is obtained；Described reversed-phase emulsion, in terms of parts by weight, comprising following components：
A) 50 parts of oil-dissolving solvent；Oil-dissolving solvent is white oil；
B) 8 parts of emulsifying agent；Emulsifier hlb value is 6.7 (by sorbester p17 (i.e. sorbitan monooleate)
HLB value 4.3；Polysorbas20 (polyoxyethylene (20EO) sorbitan mono-laurate) HLB value 16.7 mix and
Into)；
C) 30 parts of water-soluble monomer A；Water-soluble monomer A is by 18 parts of acrylamides, 6 parts of PAAs and 6
Part 2- acrylamide-2-methylpro panesulfonic acids sodium composition；
D) 5 parts of temperature-resistant anti-salt monomer；The temperature-resistant anti-salt monomer is selected from oil-soluble temperature-resistant anti-salt monomer：Methyl-prop
Olefin(e) acid octadecyl ester；
E) 25 parts of water；
Wherein, the composite initiator, in terms of above-mentioned whole weight percent monomers, comprising following components：
The water-soluble oxidizers of (a) 0.5%；Water-soluble oxidizers are ammonium persulfate
The water-soluble reducing agent of (b) 0.8%；Water-soluble reducing agent is sodium hydrogensulfite
The oil-soluble azo compound of (c) 1%；Oil-soluble azo compound is azodiisobutyronitrile
The water-soluble cross-linker of (d) 0.5%；Water-soluble cross-linker is N, N '-methylene-bisacrylamide
The urea of (e) 5%；
The disodium ethylene diamine tetraacetate of (f) 0.3%；
The sodium chloride of (g) 1%.
The concrete preparation process of polymer emulsion is：
A () oil phase is prepared：By sorbester p17 (HLB value is 4.3) that the HLB is 6.7 and polysorbas20 (HLB
It is worth the emulsifying agent 16.7) to constitute to be dissolved in 40 parts of white oils, stirs, obtains oil phase I；By methyl-prop
Olefin(e) acid octadecyl ester, azodiisobutyronitrile are dissolved in surplus white oil, are stirred, and obtain oil phase II.
B () water is mutually prepared：By acrylamide, PAA, 2- acrylamide-2-methylpro panesulfonic acid sodium, N, N '-
Methylene-bisacrylamide, urea, disodium ethylene diamine tetraacetate and sodium chloride are dissolved in 20 parts of water, are stirred,
Obtain water phase；Ammonium persulfate is dissolved in 3 parts of water and forms aqueous oxidizing agent solution, then sodium hydrogensulfite is dissolved in
Reducing agent aqueous solution is formed in excess water；
C the oil phase I is added reactor by (), add the water phase and the oil phase II, is stirred, and is added successively
Enter the aqueous oxidizing agent solution, reducing agent aqueous solution, react 4 hours at 50 DEG C, obtain the anti-phase breast of polyacrylamide
Liquid.
By Q/SH1020 Shengli Oilfiedld Subsidiary Company Of China Petrochemical Corporation company standard《Polymer microballoon in-depth profile control
Technical conditions》Assay method test emulsion system separated out solid content, microballoon initial particle, 85 DEG C,
Total salinity 120000mg/L, Ca2++Mg2+：Under 3200mg/L brines aging 1 day, 7 days, 15 days and
The expansion multiple of microspherulite diameter after 30 days, and the state observed after gained emulsion system stands 3 months, as a result such as table
Shown in 1.
By the polyacrylamide microsphere of the above-mentioned synthesis of 0.15wt%, 0.25% aliphatic alcohol polyoxyethylene sulfonate, (R is
C14Alkyl, n=6) and 99.6wt% In The Puchengs West injection water mix 2 hours, obtain a kind of uniform
Transparent composition.The TX500 types rotating interfacial tensimeter produced using Texas ,Usa university determines interface
Tension force, can form the ultralow interfacial tension of 0.0028mN/m between said composition and Pu Chengxi Districts mixed crude, will
It is applied in the scene application for improving recovery ratio, it will is played and improve well displacement efficiency and finally raising harvesting
The effect of rate.
【Comparative example 1】
The polymer microballoon of this comparative example, be redox composite initiator effect under, it is aggregated by reversed-phase emulsion
Reaction is obtained；Described reversed-phase emulsion, in terms of parts by weight, comprising following components：
A) 50 parts of oil-dissolving solvent；Oil-dissolving solvent is white oil；
B) 8 parts of emulsifying agent；Emulsifier hlb value is 4.3 sorbester p17；
C) 30 parts of water-soluble monomer A；Water-soluble monomer A is by 18 parts of acrylamides, 6 parts of PAAs and 6
Part 2- acrylamide-2-methylpro panesulfonic acids sodium composition；
D) 5 parts of temperature-resistant anti-salt monomer；The temperature-resistant anti-salt monomer is selected from oil-soluble temperature-resistant anti-salt monomer：Methyl-prop
Olefin(e) acid octadecyl ester；
E) 25 parts of water；
Wherein, the composite initiator, in terms of above-mentioned whole weight percent monomers, comprising following components：
The water-soluble oxidizers of (a) 0.5%；Water-soluble oxidizers are ammonium persulfate
The water-soluble reducing agent of (b) 0.8%；Water-soluble reducing agent is sodium hydrogensulfite
The oil-soluble azo compound of (c) 1%；Oil-soluble azo compound is azodiisobutyronitrile
The water-soluble cross-linker of (d) 0.5%；Water-soluble cross-linker is N, N '-methylene-bisacrylamide
The urea of (e) 5%；
The disodium ethylene diamine tetraacetate of (f) 0.3%；
The sodium chloride of (g) 1%.
The concrete preparation process of polymer emulsion is：
A () oil phase is prepared：The sorbester p17 emulsifying agent is dissolved in 40 parts of white oils, is stirred, obtained
Oil phase I；Octadecyl methacrylate, azodiisobutyronitrile are dissolved in surplus white oil, are stirred, obtain oil
Phase II.
B () water is mutually prepared：By acrylamide, PAA, 2- acrylamide-2-methylpro panesulfonic acid sodium, N, N '-
Methylene-bisacrylamide, urea, disodium ethylene diamine tetraacetate and sodium chloride are dissolved in 20 parts of water, are stirred,
Obtain water phase；Ammonium persulfate is dissolved in 3 parts of water and forms aqueous oxidizing agent solution, then sodium hydrogensulfite is dissolved in
Reducing agent aqueous solution is formed in excess water；
C the oil phase I is added reactor by (), add the water phase and the oil phase II, is stirred, and is added successively
Enter the aqueous oxidizing agent solution, reducing agent aqueous solution, react 4 hours at 50 DEG C, obtain the anti-phase breast of polyacrylamide
Liquid.
The characterizing method of polymer emulsion and wherein polymer microballoon is same as Example 1, as a result as shown in table 1.
By the polyacrylamide microsphere of the above-mentioned synthesis of 0.15wt%, 0.25% aliphatic alcohol polyoxyethylene sulfonate, (R is
C14Alkyl, n=6) and 99.6wt% In The Puchengs West injection water mix 2 hours, obtain a kind of uniform
Transparent composition.The TX500 types rotating interfacial tensimeter produced using Texas ,Usa university determines interface
Tension force, the interfacial tension between said composition and Pu Chengxi Districts mixed crude is 0.1009mN/m, will be unable to play very
Good improves displacement efficiency and finally improves the effect of recovery ratio.
【Comparative example 2】
The polymer microballoon of this comparative example, be redox composite initiator effect under, it is aggregated by reversed-phase emulsion
Reaction is obtained；Described reversed-phase emulsion, in terms of parts by weight, comprising following components：
A) 50 parts of oil-dissolving solvent；Oil-dissolving solvent is white oil；
B) 8 parts of emulsifying agent；Emulsifying agent HLB is 16.7 polysorbas20；
C) 30 parts of water-soluble monomer A；Water-soluble monomer A is by 18 parts of acrylamides, 6 parts of PAAs and 6
Part 2- acrylamide-2-methylpro panesulfonic acids sodium composition；
D) 5 parts of temperature-resistant anti-salt monomer；The temperature-resistant anti-salt monomer is selected from oil-soluble temperature-resistant anti-salt monomer：Methyl-prop
Olefin(e) acid octadecyl ester；
E) 25 parts of water；
Wherein, the composite initiator, in terms of above-mentioned whole weight percent monomers, comprising following components：
The water-soluble oxidizers of (a) 0.5%；Water-soluble oxidizers are ammonium persulfate
The water-soluble reducing agent of (b) 0.8%；Water-soluble reducing agent is sodium hydrogensulfite
The oil-soluble azo compound of (c) 1%；Oil-soluble azo compound is azodiisobutyronitrile
The water-soluble cross-linker of (d) 0.5%；Water-soluble cross-linker is N, N '-methylene-bisacrylamide
The urea of (e) 5%；
The disodium ethylene diamine tetraacetate of (f) 0.3%；
The sodium chloride of (g) 1%.
The concrete preparation process of polymer emulsion is：
A () oil phase is prepared：The polysorbas20 emulsifying agent is dissolved in 40 parts of white oils, is stirred, obtained
Oil phase I；Octadecyl methacrylate, azodiisobutyronitrile are dissolved in surplus white oil, are stirred, obtain oil
Phase II.
B () water is mutually prepared：By acrylamide, PAA, 2- acrylamide-2-methylpro panesulfonic acid sodium, N, N '-
Methylene-bisacrylamide, urea, disodium ethylene diamine tetraacetate and sodium chloride are dissolved in 20 parts of water, are stirred,
Obtain water phase；Ammonium persulfate is dissolved in 3 parts of water and forms aqueous oxidizing agent solution, then sodium hydrogensulfite is dissolved in
Reducing agent aqueous solution is formed in excess water；
C the oil phase I is added reactor by (), add the water phase and the oil phase II, is stirred, and is added successively
Enter the aqueous oxidizing agent solution, reducing agent aqueous solution, react 4 hours at 50 DEG C, obtain the anti-phase breast of polyacrylamide
Liquid.
The characterizing method of polymer emulsion and wherein polymer microballoon is same as Example 1, as a result as shown in table 1.
By the polyacrylamide microsphere of the above-mentioned synthesis of 0.15wt%, 0.25% aliphatic alcohol polyoxyethylene sulfonate, (R is
C14Alkyl, n=6) and 99.6wt% In The Puchengs West injection water mix 2 hours, obtain a kind of uniform
Transparent composition.The TX500 types rotating interfacial tensimeter produced using Texas ,Usa university determines interface
Tension force, the interfacial tension between said composition and Pu Chengxi Districts mixed crude is 0.3058mN/m, will be unable to play very
Good improves displacement efficiency and finally improves the effect of recovery ratio.
【Embodiment 2】
The polymer microballoon of the present embodiment, be redox composite initiator effect under, it is aggregated by reversed-phase emulsion
Reaction is obtained；Described reversed-phase emulsion, in terms of parts by weight, comprising following components：
A) 50 parts of oil-dissolving solvent；Oil-dissolving solvent is white oil；
B) 8 parts of emulsifying agent；Emulsifying agent HLB is 6.7 span 40；
C) 30 parts of water-soluble monomer A；Water-soluble monomer A is by 18 parts of acrylamides, 6 parts of PAAs and 6
Part 2- acrylamide-2-methylpro panesulfonic acids sodium composition；
D) 5 parts of temperature-resistant anti-salt monomer；The temperature-resistant anti-salt monomer is selected from oil-soluble temperature-resistant anti-salt monomer：Methyl-prop
Olefin(e) acid octadecyl ester；
E) 25 parts of water；
Wherein, the composite initiator, in terms of above-mentioned whole weight percent monomers, comprising following components：
The water-soluble oxidizers of (a) 0.5%；Water-soluble oxidizers are ammonium persulfate
The water-soluble reducing agent of (b) 0.8%；Water-soluble reducing agent is sodium hydrogensulfite
The oil-soluble azo compound of (c) 1%；Oil-soluble azo compound is azodiisobutyronitrile
The water-soluble cross-linker of (d) 0.5%；Water-soluble cross-linker is N, N '-methylene-bisacrylamide
The urea of (e) 5%；
The disodium ethylene diamine tetraacetate of (f) 0.3%；
The sodium chloride of (g) 1%.
The concrete preparation process of polymer emulsion is：
A () oil phase is prepared：The span 40 emulsifying agent is dissolved in 40 parts of white oils, is stirred, obtained
Oil phase I；Octadecyl methacrylate, azodiisobutyronitrile are dissolved in surplus white oil, are stirred, obtain oil
Phase II.
B () water is mutually prepared：By acrylamide, PAA, 2- acrylamide-2-methylpro panesulfonic acid sodium, N, N '-
Methylene-bisacrylamide, urea, disodium ethylene diamine tetraacetate and sodium chloride are dissolved in 20 parts of water, are stirred,
Obtain water phase；Ammonium persulfate is dissolved in 3 parts of water and forms aqueous oxidizing agent solution, then sodium hydrogensulfite is dissolved in
Reducing agent aqueous solution is formed in excess water；
C the oil phase I is added reactor by (), add the water phase and the oil phase II, is stirred, and is added successively
Enter the aqueous oxidizing agent solution, reducing agent aqueous solution, react 4 hours at 50 DEG C, obtain the anti-phase breast of polyacrylamide
Liquid.
The characterizing method of polymer emulsion and wherein polymer microballoon is same as Example 1, as a result as shown in table 1.
By the polyacrylamide microsphere of the above-mentioned synthesis of 0.15wt%, 0.25% aliphatic alcohol polyoxyethylene sulfonate, (R is
C14Alkyl, n=6) and 99.6wt% In The Puchengs West injection water mix 2 hours, obtain a kind of uniform
Transparent composition.The TX500 types rotating interfacial tensimeter produced using Texas ,Usa university determines interface
Tension force, can form the low interfacial tension of 0.0223mN/m, by it between said composition and Pu Chengxi Districts mixed crude
In being applied to the scene application for improving recovery ratio, it will play certain raising displacement efficiency and finally improve recovery ratio
Effect.
It was found by the inventors of the present invention that the emulsifying agent used by the present invention is preferably by the nonionic table that HLB is 1～7
Face activating agent is re-dubbed the non-ionic surface that HLB is 5～9 and lives with the nonionic surfactant that HLB is 8～18
Property agent composition, now HLB is 1～7 non-ionic surface in the non-ionic surfactant mixture for obtaining
Activating agent is improving polyacrylamide emulsion stability and is improving poly- with the nonionic surfactant that HLB is 8～18
Polymer microballoon dilatancy aspect in acrylamide emulsion has synergy.This can from embodiment 1, compare
Intuitively find out in the data on year-on-year basis of example 1, comparative example 2 and embodiment 2.
【Embodiment 3】
The polymer microballoon of the present embodiment, be redox composite initiator effect under, it is aggregated by reversed-phase emulsion
Reaction is obtained；Described reversed-phase emulsion, in terms of parts by weight, comprising following components：
A) 50 parts of oil-dissolving solvent；Oil-dissolving solvent is white oil；
B) 8 parts of emulsifying agent；Emulsifier hlb value is 6.7 (by sorbester p17 (i.e. sorbitan monooleate)
HLB value 4.3；Polysorbas20 (polyoxyethylene (20EO) sorbitan mono-laurate) HLB value 16.7 mix and
Into)；
C) 30 parts of water-soluble monomer A；Water-soluble monomer A is by 18 parts of acrylamides, 6 parts of PAAs and 6
Part 2- acrylamide-2-methylpro panesulfonic acids sodium composition；
D) 5 parts of temperature-resistant anti-salt monomer；The temperature-resistant anti-salt monomer is selected from oil-soluble temperature-resistant anti-salt monomer：To tertiary fourth
Base styrene；
E) 25 parts of water；
Wherein, the composite initiator, in terms of above-mentioned whole weight percent monomers, comprising following components：
The water-soluble oxidizers of (a) 0.5%；Water-soluble oxidizers are ammonium persulfate
The water-soluble reducing agent of (b) 0.8%；Water-soluble reducing agent is sodium hydrogensulfite
The oil-soluble azo compound of (c) 1%；Oil-soluble azo compound is azodiisobutyronitrile
The water-soluble cross-linker of (d) 0.5%；Water-soluble cross-linker is N, N '-methylene-bisacrylamide
The urea of (e) 5%；
The disodium ethylene diamine tetraacetate of (f) 0.3%；
The sodium chloride of (g) 1%.
The concrete preparation process of polymer emulsion is：
A () oil phase is prepared：By sorbester p17 (HLB value is 4.3) that the HLB is 6.7 and polysorbas20 (HLB
It is worth the emulsifying agent 16.7) to constitute to be dissolved in 40 parts of white oils, stirs, obtains oil phase I；Will be to tertiary fourth
Base styrene, azodiisobutyronitrile are dissolved in surplus white oil, are stirred, and obtain oil phase II.
B () water is mutually prepared：By acrylamide, PAA, 2- acrylamide-2-methylpro panesulfonic acid sodium, N, N '-
Methylene-bisacrylamide, urea, disodium ethylene diamine tetraacetate and sodium chloride are dissolved in 20 parts of water, are stirred,
Obtain water phase；Ammonium persulfate is dissolved in 3 parts of water and forms aqueous oxidizing agent solution, then sodium hydrogensulfite is dissolved in
Reducing agent aqueous solution is formed in excess water；
C the oil phase I is added reactor by (), add the water phase and the oil phase II, is stirred, and is added successively
Enter the aqueous oxidizing agent solution, reducing agent aqueous solution, react 2 hours at 60 DEG C, obtain the anti-phase breast of polyacrylamide
Liquid.
The characterizing method of polymer emulsion and wherein polymer microballoon is same as Example 1, as a result as shown in table 1.
By the polyacrylamide microsphere of the above-mentioned synthesis of 0.15wt%, 0.25% aliphatic alcohol polyoxyethylene sulfonate, (R is
C14Alkyl, n=6) and 99.6wt% In The Puchengs West injection water mix 2 hours, obtain a kind of uniform
Transparent composition.The TX500 types rotating interfacial tensimeter produced using Texas ,Usa university determines interface
Tension force, can form the ultralow interfacial tension of 0.0018mN/m between said composition and Pu Chengxi Districts mixed crude, will
It is applied in the scene application for improving recovery ratio, it will is played and improve well displacement efficiency and finally raising harvesting
The effect of rate.
【Embodiment 4】
The polymer microballoon of the present embodiment, be redox composite initiator effect under, it is aggregated by reversed-phase emulsion
Reaction is obtained；Described reversed-phase emulsion, in terms of parts by weight, comprising following components：
A) 50 parts of oil-dissolving solvent；Oil-dissolving solvent is white oil；
B) 8 parts of emulsifying agent；Emulsifier hlb value is 6.7 (by sorbester p17 (i.e. sorbitan monooleate)
HLB value 4.3；Polysorbas20 (polyoxyethylene (20EO) sorbitan mono-laurate) HLB value 16.7 mix and
Into)；
C) 30 parts of water-soluble monomer A；Water-soluble monomer A is by 18 parts of acrylamides, 6 parts of PAAs and 6
Part 2- acrylamide-2-methylpro panesulfonic acids sodium composition；
D) 5 parts of temperature-resistant anti-salt monomer；The temperature-resistant anti-salt monomer is selected from water-soluble temperature-resistant anti-salt monomer：N- ethene
Base pyrrolidones；
E) 25 parts of water；
Wherein, the composite initiator, in terms of above-mentioned whole weight percent monomers, comprising following components：
The water-soluble oxidizers of (a) 0.5%；Water-soluble oxidizers are ammonium persulfate
The water-soluble reducing agent of (b) 0.8%；Water-soluble reducing agent is sodium hydrogensulfite
The water-soluble azo class compound of (c) 1%；Water-soluble azo class compound is 2,2'- azos [2- (2- imidazolines
- 2- bases) propane] dihydrochloride
The water-soluble cross-linker of (d) 0.5%；Water-soluble cross-linker is N, N '-methylene-bisacrylamide
The urea of (e) 5%；
The disodium ethylene diamine tetraacetate of (f) 0.3%；
The sodium chloride of (g) 1%.
The concrete preparation process of polymer emulsion is：
A () oil phase is prepared：By sorbester p17 (HLB value is 4.3) that the HLB is 6.7 and polysorbas20 (HLB
It is worth the emulsifying agent 16.7) to constitute to be dissolved in all 50 parts of white oils, stirs, obtains oil phase.
B () water is mutually prepared：By acrylamide, PAA, 2- acrylamide-2-methylpro panesulfonic acid sodium, N- second
Vinyl pyrrolidone, 2,2'- azos [2- (2- imidazoline -2- bases) propane] dihydrochloride, N, N '-methylene bisacrylamide acyl
Amine, urea, disodium ethylene diamine tetraacetate and sodium chloride are dissolved in 20 parts of water, are stirred, and obtain water phase；Incited somebody to action
Ammonium sulfate is dissolved in 3 parts of water and forms aqueous oxidizing agent solution, then sodium hydrogensulfite is dissolved in excess water is formed also
The former agent aqueous solution；
C the oil phase is added reactor by (), add the water phase, is stirred, and sequentially adds the oxidant water
Solution, reducing agent aqueous solution, react 2 hours at 60 DEG C, obtain reversed phase latex of polyacrylamide.
The characterizing method of polymer emulsion and wherein polymer microballoon is same as Example 1, as a result as shown in table 1.
By the polyacrylamide microsphere of the above-mentioned synthesis of 0.15wt%, 0.25% aliphatic alcohol polyoxyethylene sulfonate, (R is
C14Alkyl, n=6) and 99.6wt% In The Puchengs West injection water mix 2 hours, obtain a kind of uniform
Transparent composition.The TX500 types rotating interfacial tensimeter produced using Texas ,Usa university determines interface
Tension force, can form the ultralow interfacial tension of 0.0045mN/m between said composition and Pu Chengxi Districts mixed crude, will
It is applied in the scene application for improving recovery ratio, it will is played and improve well displacement efficiency and finally raising harvesting
The effect of rate.
【Embodiment 5】
The polymer microballoon of the present embodiment, be redox composite initiator effect under, it is aggregated by reversed-phase emulsion
Reaction is obtained；Described reversed-phase emulsion, in terms of parts by weight, comprising following components：
A) 50 parts of oil-dissolving solvent；Oil-dissolving solvent is white oil；
B) 8 parts of emulsifying agent；Emulsifier hlb value is 6.7 (by sorbester p17 (i.e. sorbitan monooleate)
HLB value 4.3；Polysorbas20 (polyoxyethylene (20EO) sorbitan mono-laurate) HLB value 16.7 mix and
Into)；
C) 30 parts of water-soluble monomer A；Water-soluble monomer A is by 18 parts of acrylamides, 6 parts of PAAs and 6
Part 2- acrylamide-2-methylpro panesulfonic acids sodium composition；
D) 5 parts of temperature-resistant anti-salt monomer；The temperature-resistant anti-salt monomer is selected from water-soluble temperature-resistant anti-salt monomer：Acryloyl
Amine-n-dodecyl sodium sulfate；
E) 25 parts of water；
Wherein, the composite initiator, in terms of above-mentioned whole weight percent monomers, comprising following components：
The water-soluble oxidizers of (a) 0.5%；Water-soluble oxidizers are ammonium persulfate
The water-soluble reducing agent of (b) 0.8%；Water-soluble reducing agent is sodium hydrogensulfite
The water-soluble azo class compound of (c) 1%；Water-soluble azo class compound is 2,2'- azos [2- (2- imidazolines
- 2- bases) propane] dihydrochloride
The water-soluble cross-linker of (d) 0.5%；Water-soluble cross-linker is N, N '-methylene-bisacrylamide
The urea of (e) 5%；
The disodium ethylene diamine tetraacetate of (f) 0.3%；
The sodium chloride of (g) 1%.
The concrete preparation process of polymer emulsion is：
A () oil phase is prepared：By sorbester p17 (HLB value is 4.3) that the HLB is 6.7 and polysorbas20 (HLB
It is worth the emulsifying agent 16.7) to constitute to be dissolved in all 50 parts of white oils, stirs, obtains oil phase.
B () water is mutually prepared：By acrylamide, PAA, 2- acrylamide-2-methylpro panesulfonic acid sodium, propylene
Acyl amine-n-dodecyl sodium sulfate, 2,2'- azos [2- (2- imidazoline -2- bases) propane] dihydrochloride, N, N '-methylene
Bisacrylamide, urea, disodium ethylene diamine tetraacetate and sodium chloride are dissolved in 20 parts of water, are stirred, and obtain water
Phase；Ammonium persulfate is dissolved in 3 parts of water and forms aqueous oxidizing agent solution, then sodium hydrogensulfite is dissolved in into excess water
Middle formation reducing agent aqueous solution；
C the oil phase is added reactor by (), add the water phase, is stirred, and sequentially adds the oxidant water
Solution, reducing agent aqueous solution, react 2 hours at 60 DEG C, obtain reversed phase latex of polyacrylamide.
The characterizing method of polymer emulsion and wherein polymer microballoon is same as Example 1, as a result as shown in table 1.
By the polyacrylamide microsphere of the above-mentioned synthesis of 0.15wt%, 0.25% aliphatic alcohol polyoxyethylene sulfonate, (R is
C14Alkyl, n=6) and 99.6wt% In The Puchengs West injection water mix 2 hours, obtain a kind of uniform
Transparent composition.The TX500 types rotating interfacial tensimeter produced using Texas ,Usa university determines interface
Tension force, can form the ultralow interfacial tension of 0.0068mN/m between said composition and Pu Chengxi Districts mixed crude, will
It is applied in the scene application for improving recovery ratio, it will is played and improve well displacement efficiency and finally raising harvesting
The effect of rate.
【Comparative example 3】
The polymer microballoon of this comparative example, be redox composite initiator effect under, it is aggregated by reversed-phase emulsion
Reaction is obtained；Described reversed-phase emulsion, in terms of parts by weight, comprising following components：
A) 50 parts of oil-dissolving solvent；Oil-dissolving solvent is white oil；
B) 8 parts of emulsifying agent；Emulsifier hlb value is 6.7 (by sorbester p17 (i.e. sorbitan monooleate)
HLB value 4.3；Polysorbas20 (polyoxyethylene (20EO) sorbitan mono-laurate) HLB value 16.7 mix and
Into)；
C) 30 parts of water-soluble monomer A；Water-soluble monomer A is by 18 parts of acrylamides, 6 parts of PAAs and 6
Part 2- acrylamide-2-methylpro panesulfonic acids sodium composition；
D) 30 parts of water；
Wherein, the composite initiator, in terms of above-mentioned whole weight percent monomers, comprising following components：
The water-soluble oxidizers of (a) 0.5%；Water-soluble oxidizers are ammonium persulfate
The water-soluble reducing agent of (b) 0.8%；Water-soluble reducing agent is sodium hydrogensulfite
The water-soluble azo class compound of (c) 1%；Water-soluble azo class compound is 2,2'- azos [2- (2- imidazolines
- 2- bases) propane] dihydrochloride
The water-soluble cross-linker of (d) 0.5%；Water-soluble cross-linker is N, N '-methylene-bisacrylamide
The urea of (e) 5%；
The disodium ethylene diamine tetraacetate of (f) 0.3%；
The sodium chloride of (g) 1%.
The concrete preparation process of polymer emulsion is：
A () oil phase is prepared：By sorbester p17 (HLB value is 4.3) that the HLB is 6.7 and polysorbas20 (HLB
It is worth the emulsifying agent 16.7) to constitute to be dissolved in all 50 parts of white oils, stirs, obtains oil phase.
B () water is mutually prepared：By acrylamide, PAA, 2- acrylamide-2-methylpro panesulfonic acid sodium, 2,2'-
Azo [2- (2- imidazoline -2- bases) propane] dihydrochloride, N, N '-methylene-bisacrylamide, urea, ethylenediamine tetraacetic
Acetic acid disodium and sodium chloride are dissolved in 25 parts of water, are stirred, and obtain water phase；Ammonium persulfate is dissolved in into 3 parts of water
Middle formation aqueous oxidizing agent solution, then sodium hydrogensulfite is dissolved in excess water forms reducing agent aqueous solution；
C the oil phase is added reactor by (), add the water phase, is stirred, and sequentially adds the oxidant water
Solution, reducing agent aqueous solution, react 2 hours at 60 DEG C, obtain reversed phase latex of polyacrylamide.
The characterizing method of polymer emulsion and wherein polymer microballoon is same as Example 1, as a result as shown in table 1.
By the polyacrylamide microsphere of the above-mentioned synthesis of 0.15wt%, 0.25% aliphatic alcohol polyoxyethylene sulfonate, (R is
C14Alkyl, n=6) and 99.6wt% In The Puchengs West injection water mix 2 hours, obtain a kind of uniform
Transparent composition.The TX500 types rotating interfacial tensimeter produced using Texas ,Usa university determines interface
Tension force, can form the ultralow interfacial tension of 0.0685mN/m between said composition and Pu Chengxi Districts mixed crude, will
It is applied in the scene application for improving recovery ratio, it will is played certain raising displacement efficiency and is finally improved harvesting
The effect of rate.
It was found by the inventors of the present invention that the polyacrylamide microsphere prepared by the present invention and AEO sulphur
The transfer drive composition that hydrochlorate is formed, can form ultralow interfacial tension, by it and the crude oil of Zhongyuan Oil Field Pu Chengxi Districts between
In being applied to the scene application for improving recovery ratio, it will play and improve well displacement efficiency and finally improve recovery ratio
Effect.Meanwhile, the reversed-phase emulsion prepared by the present invention can well solve the polymer in prior art emulsion
The problem of dilatancy difference under the conditions of microballoon high temperature and high salt, this is same from embodiment 1, embodiment 3～5 and comparative example 3
Than can intuitively find out in data.
Table 1
Claims (10)
1. a kind of transfer drive composition, by weight percentage including following component：
(1) 0.01～3.0% temperature-tolerant anti-salt polyacrylamide microballoon；
(2) 0.01～5.0% anion-nonionic surfactant；
(3) 92.0～99.98% injection water.
2. transfer drive composition according to claim 1, it is characterised in that the total salinity of described injection water is
80000～180000mg/L, wherein Ca2++Mg2+For 1000～5000mg/L.
3. transfer drive composition according to claim 1, it is characterised in that described anion-nonionic surface-active
Agent molecule formula is RO (CH2CH2O)nCH2SO3M, R are C10～C25Alkyl, n=1～20, M selected from H,
Alkali metal or NH4。
4. transfer drive composition according to claim 3, it is characterised in that R is C12～C18Alkyl.
5. transfer drive composition according to claim 3, it is characterised in that n=2～8.
6. transfer drive composition according to claim 3, it is characterised in that the alkali metal is selected from potassium, sodium or lithium.
7. transfer drive composition according to claim 1, it is characterised in that the temperature-tolerant anti-salt polyacrylamide is micro-
Ball is under the effect of redox composite initiator, by obtained in the aggregated reaction of reversed-phase emulsion；Described anti-phase breast
Liquid, in terms of parts by weight, comprising following components：
A) 50 parts of oil-dissolving solvent；
B) 2～15 parts of emulsifying agent；
C) 10～60 parts of water-soluble monomer A；
D) 0.5～15 part of temperature-resistant anti-salt monomer；The temperature-resistant anti-salt monomer selected from water-soluble temperature-resistant anti-salt monomer or
At least one in oil-soluble temperature-resistant anti-salt monomer；
E) 10～50 parts of water；
Wherein, the composite initiator, in terms of above-mentioned whole weight percent monomers, comprising following components：
The oxidant of (a) 0.02～1.0%；
The reducing agent of (b) 0.02～2.0%；
The azo compound of (c) 0.03～2.0%；
The crosslinking agent of (d) 0.01～1.0%；
The urea of (e) 0.1～10%, thiocarbamide；
The complexones of (f) 0.01～0.5%；
The electrolytic salt of (g) 0.5～5%.
8. transfer drive composition according to claim 7, it is characterised in that the oil-dissolving solvent is selected from hydrocarbon or ester
In at least one.
9. transfer drive composition according to claim 7, it is characterised in that the HLB value of the emulsifying agent is 4～
9。
10. according to the arbitrary described transfer drive composition of claim 1～9 in high temperature and high salt LOW PERMEABILITY RESERVOIR tertiary oil recovery
Application.
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| CN116903785A (en) * | 2023-09-13 | 2023-10-20 | 东营科创生物化工有限公司 | Modified polyacrylamide filtrate reducer for drilling fluid and preparation method thereof |
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