CN103937474A - Environment-friendly high strength profile control water shut-off agent and preparation method thereof - Google Patents

Environment-friendly high strength profile control water shut-off agent and preparation method thereof Download PDF

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Publication number
CN103937474A
CN103937474A CN201410109888.2A CN201410109888A CN103937474A CN 103937474 A CN103937474 A CN 103937474A CN 201410109888 A CN201410109888 A CN 201410109888A CN 103937474 A CN103937474 A CN 103937474A
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agent
controlling
water
plugging agent
polyacrylamide
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Inventor
张军
何志强
冉汶鑫
陈蔚立
熊俊
李伟强
杨智
彭啟强
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SICHUAN RENZHI OILFIELD TECHNOLOGY SERVICES Co Ltd
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SICHUAN RENZHI OILFIELD TECHNOLOGY SERVICES Co Ltd
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Priority to CN201410109888.2A priority Critical patent/CN103937474A/en
Publication of CN103937474A publication Critical patent/CN103937474A/en
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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
    • C09K8/50—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
    • C09K8/512—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
    • 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
    • C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
    • C09K8/504—Compositions based on water or polar solvents
    • C09K8/5045—Compositions based on water or polar solvents containing inorganic compounds
    • 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
    • C09K8/50—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
    • 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
    • C09K8/50—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
    • C09K8/5083—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds

Abstract

The invention discloses an environment-friendly high strength profile control water shut-off agent and a preparation method thereof, and aims to solve the problems that conventional water shut-off agents are pollutant, and long-term use of the conventional water shut-off agent will pollute the environment and harm the human body. The water shut-off agent is composed of high polymers, a cross-linking agent, a catalyst, an antioxidant, and water. Through the organic cooperation among high polymers, a cross-linking agent, and a catalyst, a high strength, environment-friendly, and non-toxic profile control water shut-off agent is prepared, and the water shut-off agent can be widely applied to water shut-off operations of various oil reservoir profile controls. Polyaziridine is taken as the cross-linking agent, and the prepared gel has the advantages of deeper processing ground layer, higher strength, better stability, environment-friendliness, and no toxicity. Experiment results have proven that the water shut-off agent can well improve the profile performance and the water shut-off performance, is capable of being applied to the oil fields, and can improve the development effect of oil field water injection. The water shut-off agent is compounded by high polymers, a cross-linking agent, an antioxidant, and the like, and can be widely applied to water shut-off operations of various oil reservoir profile controls.

Description

A kind of environment protection type high-strength profile-controlling and plugging agent and preparation method thereof
Technical field
The present invention relates to chemical field, especially the field of gathering, oil field, is specially a kind of environment protection type high-strength profile-controlling and plugging agent and preparation method thereof.
Background technology
In the long period of development process in oil field, producing energy is decayed gradually, must exploit by water filling.Due to long-term injecting water exploitation, washing away in a large number during water filling causes that oil reservoir clay and cementing matter expand, corrosion, and fine migration, causes stratum heterogeneous body situation more and more serious.Nonuniformity and disadvantageous profit mobility ratio due to oil reservoir, cause injected water along most permeable zone and the inhomogeneous propelling of high permeability zones, forming in the vertical individual layer advances by leaps and bounds, form in the horizontal fingering, finally cause injected water to break through in advance, cause most permeable zone water logging, recovery well premature water breakthrough, and in, low permeability layer development degree is lower or do not employ.The low effective circulation of this water filling, has not only reduced sweep efficiency, the waterflooding effect of water, and causes the processing cost rising of energy consumption increase, production fluid, the corrosion aggravation of pipeline, and cost for oil production is significantly raise.Therefore, how to promote the waterflood recovery efficiency factor of high water-cut stage, become people's problem demanding prompt solution.
In order to improve waterflooding development effect, improve intake profile, developed broad variety, the good profile-controlling and plugging agent of effect both at home and abroad.At present, on mining site, common profile control blocking agent is mainly polymer gel class amendment, and such plugging agent mainly adopts Cr 3+cross-linking system, Al 3+cross-linking system and organic phenolic aldehyde cross-linking system etc., these a few class profile-controlling and plugging agents have all been obtained good effect in applying at the scene, but also have certain shortcoming.Cr 3+the amendment adaptability of cross-linking system is stronger, in wider pH value and temperature range, all can use, and gelation time is controlled, and after plastic, intensity is larger, and stability is better; But Cr 3+the gel toxicity that cross-linking system configures is larger, can damage workmen's health and surrounding enviroment.If use potassium bichromate, prepare Cr 3+the amendment of cross-linking system, sexavalent chrome is wherein highly toxic substance, has strong carcinogenic teratogenecity, more serious to the harm of human body and surrounding enviroment.Al 3+the amendment toxicity of cross-linking system is less, and the injury that environment is caused is very little, but long-term, a large amount of use to appoint so can cause stronger pollution to environment, it enters utmost point difficult degradation after endless chain, and human body is also had compared with major injury.Meanwhile, the gel gelation time of its preparation is shorter, and injection efficiency and construction are had a certain impact.And Al 3+the amendment of cross-linking system is mainly applicable to lower, the neutral or acid oil reservoir of reservoir temperature.The amendment of organic phenolic aldehyde cross-linking system is mainly applicable to the deep transfer drive of high-temperature oil reservoir, and it is mainly comprised of formaldehyde and phenol, has irritating smell, and toxicity is larger, to human body and environment, can damage.
In sum, all there is pollution problem in the cross-linking system that existing gel is used, and life-time service can cause environmental pollution, and human body is produced to harm, therefore, and the profile-controlling and plugging agent of, environmental protection little in the urgent need to a kind of toxicity at present.
Summary of the invention
Goal of the invention of the present invention is: for existing amendment, all have pollution, life-time service can cause environmental pollution, human body is produced to the problem of harm, and a kind of environment protection type high-strength profile-controlling and plugging agent and preparation method thereof is provided.The present invention is by organic cooperation of high molecular polymer, linking agent, catalyzer, prepares a kind of profile-controlling and plugging agent with higher-strength, environmentally friendly, environment-protecting asepsis, can be widely used in all kinds of reservoir profile water-blocking operations.The present invention be take polyethylene imine as linking agent, and prepared frozen glue processing depth of stratum is large, intensity is high, good stability, and environment-protecting asepsis.Experiment showed, that the present invention has good section ability and the shut-off capacity of improving, can be applied to Oil Field, improve the development effectiveness of oil-field flooding.
To achieve these goals, the present invention adopts following technical scheme:
An environment protection type high-strength profile-controlling and plugging agent, comprises high molecular polymer, linking agent, catalyzer, antioxidant, water, and the weight percent of each component is as follows:
Wherein, described high molecular polymer is polyacrylamide, and the relative molecular mass of described polyacrylamide is 600 * 10 4～1800 * 10 4, degree of hydrolysis is below 8%; Described linking agent is polymine (Polyethylenimine is abbreviated as PEI), and the relative molecular weight of described polymine is 600～70000; Described catalyzer is organic acid, and described antioxidant is Sodium Pyrosulfite.
Described polyacrylamide is non-ionic polyacrylamide or anion-polyacrylamide.
Described organic acid is one or more in citric acid, acetic acid.
Described water is the salt solution that pure water or salinity are 500～30000mg/l.
The mass ratio of described polyacrylamide and polyethylene imine is 3.4～12.5.
The preparation method of aforementioned environment protection type high-strength profile-controlling and plugging agent, comprises the steps:
A) by proportioning, take each component, in high molecular polymer, add part water, be mixed with solution, normal temperature slaking 2～5h, obtains slaking mother liquor;
B) in slaking mother liquor, add catalyzer and remaining water again, stir 1-4h, finally add again remaining ingredient, stir 5～30min, obtain product.
In described step a, the normal temperature curing time is 3～4h.
In described step a, by proportioning, take each component, in high molecular polymer, add part water, be mixed with the solution that high molecular polymerization substrate concentration is 6000mg/l, normal temperature slaking 3～4h, obtains slaking mother liquor.
In described step b, then add catalyzer and remaining water in slaking mother liquor, stir 1.5-2.5h, finally add again linking agent and antioxidant, stir 10～15min, obtain product.
The present invention is directed to foregoing problems, a kind of environment protection type high-strength profile-controlling and plugging agent and preparation method thereof is provided, can effectively improve oil recovery rate.Profile-controlling and plugging agent of the present invention adopts composite the forming such as high molecular polymer, linking agent, catalyzer, antioxidant, can be widely used in all kinds of reservoir profile water-blocking operations.Wherein, host is high molecular polymer, and this high molecular polymer is polyacrylamide, and polyacrylamide is non-ionic polyacrylamide or anion-polyacrylamide, and relative molecular mass is 600 * 10 4～1800 * 10 4, its degree of hydrolysis is below 8%; Linking agent is selected the polymine of relative molecular weight between 600～70000, and polymine claims again polyethylene imine, and its molecular structural formula is catalyzer is selected one or more in citric acid, acetic acid, and it can be salt solution or the pure water of salinity at 500～30000mg/l that antioxidant (or claiming stablizer) is selected Sodium Pyrosulfite, water used.Wherein, the mass ratio of polyacrylamide and polyethylene imine is 3.4～12.5.The present invention carries out nucleophilic substitution reaction by polyacrylamide and polyethylene imine, in water, can there is protonation reaction in polyethylene imine, carboxyl easily and ammonium root direct reaction, cause linking agent and polymkeric substance flocculation, catalyzer plays catalyzed reaction, antioxidant provides reaction conditions, and the present invention is by cooperatively interacting between component, prepares to can be used for that environment-friendly type, the salt tolerant of water injection well in oil fields profile control and producing well water blockoff is poly-, high-strength polymer plugging agent.
The gelation time of frozen glue and the decision method of intensity are according to gel-strength (Gel Strength Codes is called for short GSC) the range estimation code table of the people such as Sydansk (1988), as shown in Table 1 below.
Table 1 gel-strength range estimation code table
By observation blocking agent system status, determine the presetting period, the system that refers generally to becomes flow-gel C(gel-strength code by solution A) time of experiencing.
According to the gel-strength range estimation code table shown in above-mentioned table 1, gelation time of the present invention is along with the concentration of each component is different and different, at high molecular polymerization substrate concentration and crosslinker concentration, certain in the situation that, linking agent polyethylene imine molecular weight is larger, and plastic is faster; At linking agent polyethylene imine concentration and molecular weight, certain in the situation that, along with the increase of high molecular polymerization substrate concentration, plastic speed is accelerated.Gelation time of the present invention is between 24 hours～96 hours, and final strength maximum can reach not flow-gel H level of slight deformation, has higher intensity.
Meanwhile, the invention provides the preparation method of aforementioned environment protection type high-strength profile-controlling and plugging agent.
On-the-spot using method of the present invention: configure environment protection type high-strength crosslinked gel plugging agent in stirred pot, according to on-the-spot geological condition design concentration and dosage, environment protection type high-strength crosslinked gel plugging agent is clamp-oned to stratum from well, according to gelation time closing well for some time, after it forms gel, normal water filling then drives a well.
Compare with conventional profile control and water plugging system, environment-protecting asepsis of the present invention, environmentally friendly, meanwhile, it is large that the formed frozen glue of the present invention is processed depth of stratum, has higher intensity in stratum, has that intensity is high, a good stability, nontoxic feature.The present invention has good section ability and the shut-off capacity of improving, and can be applicable to Oil Field, improves water flooding effect.
Accompanying drawing explanation
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein:
Fig. 1 is concentration and relative rediance graph of a relation in embodiment 1.
Embodiment
Disclosed all features in this specification sheets, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Disclosed arbitrary feature in this specification sheets, unless narration especially all can be replaced by other equivalences or the alternative features with similar object.That is,, unless narration especially, each feature is an example in a series of equivalences or similar characteristics.
Embodiment 1
In the profile-controlling and plugging agent of the present embodiment, the mass concentration of macromolecule copolymer polyacrylamide is 6000mg/L, and the molecular weight of polyacrylamide is 1,000 ten thousand; The molecular weight of linking agent polyethylene imine is 18000, and the mass ratio of high molecular polymer and linking agent is 4:1, and the mass percent of linking agent polyethylene imine is 2500mg/L; Catalyzer is acetic acid, and the mass percent of acetic acid in profile-controlling and plugging agent is 0.01%; The mass percent of antioxidant Sodium Pyrosulfite in profile-controlling and plugging agent is 0.02%.The gelation time of the profile-controlling and plugging agent of the present embodiment is 24h, and final strength reaches G level.
Preparation method: take each component by proportioning, add part water in polyacrylamide, stir and be mixed with the solution that polyacrylamide mass concentration is 6000mg/l, under normal temperature, slaking is 3～4 hours, obtains slaking mother liquor.In slaking mother liquor, add catalyzer again, and add remaining water, then to being placed on magnetic stirrer, with 600～1000R/m speed, stir 2 hours, then remaining polyacrylamide and Sodium Pyrosulfite are added wherein, stir about 10 minutes, obtain product.
Embodiment 2
In the profile-controlling and plugging agent of the present embodiment, the mass concentration of macromolecule copolymer polyacrylamide is 8000mg/L, and the molecular weight of polyacrylamide is 1,000 ten thousand; The molecular weight of linking agent polyethylene imine is 18000, and the mass ratio of high molecular polymer and linking agent is 6:1; Catalyzer is acetic acid, and the mass percent of acetic acid in profile-controlling and plugging agent is 0.01%; The mass percent of antioxidant Sodium Pyrosulfite in profile-controlling and plugging agent is 0.02%.The gelation time of the profile-controlling and plugging agent of the present embodiment is 40h, and final strength reaches D level.
Preparation method: take each component by proportioning, add part water in polyacrylamide, stir and be mixed with the solution that polyacrylamide mass concentration is 6000mg/l, under normal temperature, slaking is 3～4 hours, obtains slaking mother liquor.In slaking mother liquor, add catalyzer again, and add remaining water, then to being placed on magnetic stirrer, with 600～1000R/m speed, stir 2 hours, then remaining polyacrylamide and Sodium Pyrosulfite are added wherein, stir about 10 minutes, obtain product.
Embodiment 3
In the profile-controlling and plugging agent of the present embodiment, the mass concentration of macromolecule copolymer polyacrylamide is 8000mg/L, and the molecular weight of polyacrylamide is 1,000 ten thousand; The molecular weight of linking agent polyethylene imine is 10000, and the mass ratio of high molecular polymer and linking agent is 8:1; Catalyzer is citric acid, and the mass percent of acetic acid in profile-controlling and plugging agent is 0.01%; The mass percent of antioxidant Sodium Pyrosulfite in profile-controlling and plugging agent is 0.02%.The gelation time of the profile-controlling and plugging agent of the present embodiment is 40h, and final strength reaches D level.
Preparation method: take each component by proportioning, add part water in polyacrylamide, stir and be mixed with the solution that polyacrylamide mass concentration is 6000mg/l, under normal temperature, slaking is 3～4 hours, obtains slaking mother liquor.In slaking mother liquor, add catalyzer again, and add remaining water, then to being placed on magnetic stirrer, with 600～1000R/m speed, stir 2 hours, then remaining polyacrylamide and Sodium Pyrosulfite are added wherein, stir about 10 minutes, obtain product.
Embodiment 4
In the profile-controlling and plugging agent of the present embodiment, the mass concentration of macromolecule copolymer polyacrylamide is 10000mg/L, and the molecular weight of polyacrylamide is 1,000 ten thousand; The molecular weight of linking agent polyethylene imine is 18000, and the mass ratio of high molecular polymer and linking agent is 10:1; Catalyzer is citric acid, and the mass percent of acetic acid in profile-controlling and plugging agent is 0.01%; The mass percent of antioxidant Sodium Pyrosulfite in profile-controlling and plugging agent is 0.02%.The gelation time of the profile-controlling and plugging agent of the present embodiment is 46h, and final strength reaches E level.
Preparation method: take each component by proportioning, add part water in polyacrylamide, stir and be mixed with the solution that polyacrylamide mass concentration is 6000mg/l, under normal temperature, slaking is 3～4 hours, obtains slaking mother liquor.In slaking mother liquor, add catalyzer again, and add remaining water, then to being placed on magnetic stirrer, with 600～1000R/m speed, stir 2 hours, then remaining polyacrylamide and Sodium Pyrosulfite are added wherein, stir about 10 minutes, obtain product.
Embodiment 5
In the profile-controlling and plugging agent of the present embodiment, the mass concentration of macromolecule copolymer polyacrylamide is 5000mg/L, and the molecular weight of polyacrylamide is 1,500 ten thousand; The molecular weight of linking agent polyethylene imine is 50000, and the mass ratio of high molecular polymer and linking agent is 4:1; Catalyzer is acetic acid, and the mass percent of acetic acid in profile-controlling and plugging agent is 0.08%; The mass percent of antioxidant Sodium Pyrosulfite in profile-controlling and plugging agent is 0.025%.The gelation time of the profile-controlling and plugging agent of the present embodiment is 60h, and final strength reaches D level.
Preparation method: take each component by proportioning, add part water in polyacrylamide, stir and be mixed with the solution that polyacrylamide mass concentration is 4000mg/l, under normal temperature, slaking is 5 hours, obtains slaking mother liquor.In slaking mother liquor, add catalyzer again, and add remaining water, then to being placed on magnetic stirrer, with 600～1000R/m speed, stir 3.5 hours, then remaining polyacrylamide and Sodium Pyrosulfite are added wherein, stir 20min, obtain product.
Embodiment 6
In the profile-controlling and plugging agent of the present embodiment, the mass concentration of macromolecule copolymer polyacrylamide is 10000mg/L, and the molecular weight of polyacrylamide is 8,000,000; The molecular weight of linking agent polyethylene imine is 6000, and the mass ratio of high molecular polymer and linking agent is 5:1; Catalyzer is citric acid, and the mass percent of acetic acid in profile-controlling and plugging agent is 0.02%; The mass percent of antioxidant Sodium Pyrosulfite in profile-controlling and plugging agent is 0.035%.The gelation time of the profile-controlling and plugging agent of the present embodiment is 42h, and final strength reaches D level.
Preparation method: take each component by proportioning, add part water in polyacrylamide, stir and be mixed with the solution that polyacrylamide mass concentration is 5000mg/l, under normal temperature, slaking is 3 hours, obtains slaking mother liquor.In slaking mother liquor, add catalyzer again, and add remaining water, then to being placed on magnetic stirrer, with 1200R/m speed, stir 2h, then remaining polyacrylamide and Sodium Pyrosulfite are added wherein, stir 15min, obtain product.
The product of above-described embodiment 1 preparation is measured the toxicity of linking agent or polymkeric substance by oil and gas industry standard Q/SY111-2004 < < Oilfield Chemicals, the classification of drilling fluid bio-toxicity and detection method photogenic bacterium method > >.By the matching photogenic bacterium relation of relative rediance (T) and preparing product concentration (g/L) in an embodiment, with relative rediance 50% time concentration (EC 50) toxicity is carried out to classification, concrete analysis standard is shown in Table 2.
Table 2 is according to EC 50the toxicity rank table of dividing
Toxicity grading Severe toxicity Severe Poisoning Micro-poison Nontoxic
EC 50/mg/L ＜1 1～100 101～1000 1001～25000 ＞25000
The product of embodiment 1 of take is basic sample, is diluted to the test specimens of different concns, measures the luminous intensity of photogenic bacterium in test specimens, and experimental result as shown in Figure 1.The EC of product of the present invention 50for 26000mg/L, its surperficial the present invention is a kind of environment amenable plugging agent.
The profile-controlling and plugging agent of above-described embodiment 1～4 preparation, by indoor physical simulation fill out sand tube flowing experiment, is investigated its section and is improved ability and improve recovery ratio ability, and fill out sand tube is in parallel, injects respectively 0.3PV, and it the results are shown in Table 3.The calculation formula of profile improvement rate ν is as follows:
v = Q hb Q ib - Q ha Q ia Q hb Q ib &times; 100 % ;
In formula:
Q ib---the water regain before low permeability layer transfer drive, mL;
Q ia---the water regain after low permeability layer transfer drive, mL;
Q hb---the water regain before most permeable zone transfer drive, mL;
Q ha---the water regain after most permeable zone transfer drive, mL.
Table 3 environment protection type high-strength crosslinked gel profile-controlling and plugging agent fill out sand tube flowing experiment in parallel situation
In table 3, reacted the profile improvement rate of the environment-friendly type frozen glue that embodiment 1～4 configures and improved recovery ratio ability.As can be seen from Table 3, the profile improvement rate of the frozen glue configuring is all more than 95%, and the recovery ratio of hypotonic fill out sand tube improves to some extent, and the ability that starts LOW PERMEABILITY RESERVOIR is stronger.
The profile-controlling and plugging agent of above-described embodiment 1～4 preparation is investigated to its shut-off capacity by indoor physical simulation fill out sand tube flowing experiment, adopt single fill out sand tube, inject respectively 0.3PV, it the results are shown in Table 4.
The test of table 4 environment protection type high-strength crosslinked gel profile-controlling and plugging agent sealing characteristics
As can be seen from Table 4, the sealing ratiod of the environment-friendly type frozen glue that embodiment 1～4 configures, all more than 95%, has good shutoff.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature or any new combination disclosing in this manual, and the arbitrary new method disclosing or step or any new combination of process.

Claims (9)

1. an environment protection type high-strength profile-controlling and plugging agent, is characterized in that, comprises high molecular polymer, linking agent, catalyzer, antioxidant, water, and the weight percent of each component is as follows:
Wherein, described high molecular polymer is polyacrylamide, and degree of hydrolysis is below 8%, and the relative molecular mass of described polyacrylamide is 600 * 10 4～1800 * 10 4; Described linking agent is polymine, and the relative molecular weight of described polymine is 600～70000; Described catalyzer is organic acid, and described antioxidant is Sodium Pyrosulfite.
2. environment protection type high-strength profile-controlling and plugging agent according to claim 1, is characterized in that, described polyacrylamide is non-ionic polyacrylamide or anion-polyacrylamide.
3. environment protection type high-strength profile-controlling and plugging agent according to claim 1, is characterized in that, described organic acid is one or more in citric acid, acetic acid.
4. according to the environment protection type high-strength profile-controlling and plugging agent described in claim 1-3 any one, it is characterized in that, described water is the salt solution that pure water or salinity are 500～30000mg/l.
5. according to the environment protection type high-strength profile-controlling and plugging agent described in claim 1-4 any one, it is characterized in that, the mass ratio of described polyacrylamide and polyethylene imine is 3.4～12.5.
6. according to the preparation method of the environment protection type high-strength profile-controlling and plugging agent described in claim 1-5 any one, it is characterized in that, comprise the steps:
A) by proportioning, take each component, in high molecular polymer, add part water, be mixed with solution, normal temperature slaking 2～5h, obtains slaking mother liquor;
B) in slaking mother liquor, add catalyzer and remaining water again, stir 1-4h, finally add again remaining ingredient, stir 5～30min, obtain product.
7. the preparation method of environment protection type high-strength profile-controlling and plugging agent according to claim 6, is characterized in that, in described step a, the normal temperature curing time is 3～4h.
8. the preparation method of environment protection type high-strength profile-controlling and plugging agent according to claim 7, it is characterized in that, in described step a, by proportioning, take each component, in high molecular polymer, add part water, be mixed with the solution that high molecular polymerization substrate concentration is 6000mg/l, normal temperature slaking 3～4h, obtains slaking mother liquor.
9. according to the preparation method of the environment protection type high-strength profile-controlling and plugging agent described in claim 6-8 any one, it is characterized in that, in described step b, in slaking mother liquor, add catalyzer and remaining water again, stir 1.5-2.5h, finally add again linking agent and antioxidant, stir 10～15min, obtain product.
CN201410109888.2A 2014-03-24 2014-03-24 Environment-friendly high strength profile control water shut-off agent and preparation method thereof Pending CN103937474A (en)

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Cited By (5)

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CN105733537A (en) * 2016-03-22 2016-07-06 沈阳华盈环保材料有限公司 Gel water shut-off and profile control agent and preparation method thereof
CN106350044A (en) * 2016-07-27 2017-01-25 大港油田集团有限责任公司 Low-toxicity environment-friendly polymer crosslinking agent for profile control
CN109868126A (en) * 2017-12-01 2019-06-11 中国石油天然气股份有限公司 A kind of water shutoff agent and its preparation method and application
CN110938416A (en) * 2018-09-21 2020-03-31 中国石油化工股份有限公司 Profile control agent and preparation method and application thereof
CN111334267A (en) * 2018-12-18 2020-06-26 中国石油化工股份有限公司 Profile control agent and preparation method and application thereof

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