CN115960309A - Polymer sand stabilizer and preparation method thereof - Google Patents
Polymer sand stabilizer and preparation method thereof Download PDFInfo
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- CN115960309A CN115960309A CN202310104863.2A CN202310104863A CN115960309A CN 115960309 A CN115960309 A CN 115960309A CN 202310104863 A CN202310104863 A CN 202310104863A CN 115960309 A CN115960309 A CN 115960309A
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- acrylamide
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- methylpropanesulfonic acid
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- 239000004576 sand Substances 0.000 title claims abstract description 121
- 239000003381 stabilizer Substances 0.000 title claims abstract description 65
- 229920000642 polymer Polymers 0.000 title claims abstract description 18
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000000178 monomer Substances 0.000 claims abstract description 35
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 239000003999 initiator Substances 0.000 claims abstract description 15
- DZSVIVLGBJKQAP-UHFFFAOYSA-N 1-(2-methyl-5-propan-2-ylcyclohex-2-en-1-yl)propan-1-one Chemical compound CCC(=O)C1CC(C(C)C)CC=C1C DZSVIVLGBJKQAP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000003756 stirring Methods 0.000 claims abstract description 12
- 150000003512 tertiary amines Chemical class 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000001301 oxygen Substances 0.000 claims abstract description 4
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 4
- 230000001376 precipitating effect Effects 0.000 claims abstract description 4
- GDFCSMCGLZFNFY-UHFFFAOYSA-N Dimethylaminopropyl Methacrylamide Chemical compound CN(C)CCCNC(=O)C(C)=C GDFCSMCGLZFNFY-UHFFFAOYSA-N 0.000 claims description 10
- OMNKZBIFPJNNIO-UHFFFAOYSA-N n-(2-methyl-4-oxopentan-2-yl)prop-2-enamide Chemical compound CC(=O)CC(C)(C)NC(=O)C=C OMNKZBIFPJNNIO-UHFFFAOYSA-N 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 9
- JKNCOURZONDCGV-UHFFFAOYSA-N 2-(dimethylamino)ethyl 2-methylprop-2-enoate Chemical compound CN(C)CCOC(=O)C(C)=C JKNCOURZONDCGV-UHFFFAOYSA-N 0.000 claims description 2
- UUORTJUPDJJXST-UHFFFAOYSA-N n-(2-hydroxyethyl)prop-2-enamide Chemical compound OCCNC(=O)C=C UUORTJUPDJJXST-UHFFFAOYSA-N 0.000 claims description 2
- ZEMHQYNMVKDBFJ-UHFFFAOYSA-N n-(3-hydroxypropyl)prop-2-enamide Chemical compound OCCCNC(=O)C=C ZEMHQYNMVKDBFJ-UHFFFAOYSA-N 0.000 claims description 2
- SWPMNMYLORDLJE-UHFFFAOYSA-N n-ethylprop-2-enamide Chemical compound CCNC(=O)C=C SWPMNMYLORDLJE-UHFFFAOYSA-N 0.000 claims description 2
- 239000002994 raw material Substances 0.000 abstract description 11
- 230000002265 prevention Effects 0.000 abstract description 6
- 239000011435 rock Substances 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 239000003208 petroleum Substances 0.000 abstract description 2
- 238000005406 washing Methods 0.000 abstract description 2
- 238000004090 dissolution Methods 0.000 abstract 1
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- 230000015572 biosynthetic process Effects 0.000 description 7
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 230000002194 synthesizing effect Effects 0.000 description 6
- 229920000536 2-Acrylamido-2-methylpropane sulfonic acid Polymers 0.000 description 5
- XHZPRMZZQOIPDS-UHFFFAOYSA-N 2-Methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid Chemical compound OS(=O)(=O)CC(C)(C)NC(=O)C=C XHZPRMZZQOIPDS-UHFFFAOYSA-N 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 4
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- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
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- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- GXMIHVHJTLPVKL-UHFFFAOYSA-N n,n,2-trimethylpropanamide Chemical compound CC(C)C(=O)N(C)C GXMIHVHJTLPVKL-UHFFFAOYSA-N 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
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- 238000006116 polymerization reaction Methods 0.000 description 1
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- 230000035484 reaction time Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
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- 239000011780 sodium chloride Substances 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention discloses a polymer sand stabilizer, which is prepared by the following steps of dissolving a certain amount of 2-acrylamide-2-methylpropanesulfonic acid in water, adjusting the pH value of the solution to 7-8, then adding acrylamide, N-substituted water-soluble acrylamide and unsaturated tertiary amine monomers, controlling the total amount of reaction monomers consisting of the 2-acrylamide-2-methylpropanesulfonic acid, the acrylamide, the N-substituted water-soluble acrylamide and the unsaturated tertiary amine monomers to account for 18-30% of the solution, stirring for dissolution, introducing nitrogen for removing oxygen, adding an initiator, stopping stirring, reacting for 4-8 hours at 50-60 ℃, washing a product gel with absolute ethyl alcohol, precipitating, crushing and drying to obtain the polymer sand stabilizer; the polymer sand stabilizer provided by the invention is applicable to sand prevention and sand fixation in loose sandstone oil fields, can form a film on the surface of rock, has good flowing property, is simple in preparation and construction process, wide in raw material source, and can be well and widely applied to the field of sand prevention in petroleum engineering.
Description
Technical Field
The invention relates to the technical field of oilfield chemistry, in particular to a polymer sand stabilizer and a preparation method thereof.
Background
The loose sandstone reservoir which is widely existed in the current oil and gas development has the problems of shallow burying, loose reservoir cementation, low rock strength, easy sand production of the reservoir in the production and injection processes and the like, if the treatment and the prevention are improper, the normal production of an oil field can be seriously influenced, the high-efficiency development of the oil and gas field is restricted, and the problems of oil field yield reduction, oil pipe oil pump blockage, sand washing operation frequency increase and the like are easily caused.
Accordingly, a large number of oil field sand control technologies are developed at present correspondingly for the development of oil wells with easy sand production, and as the oil field sand control technologies continuously tend to be perfect and mature, two categories of chemical sand control and mechanical sand control are gradually formed, wherein the chemical sand control refers to the step of injecting organic or inorganic chemical agents into a loose reservoir or a pre-packed sand layer of an oil field to consolidate sand grains of a loose sandstone reservoir so as to stabilize the stratum structure and achieve the purpose of treating both symptoms and root causes, and compared with other sand control measures, the oil field sand control technology has irreplaceable advantages. However, the conventional chemical sand control system mainly uses phenolic resin chemical resin for sand control, and has the problems of high density, easy deposition, incapability of being uniformly injected into a stratum, great damage to the permeability of the stratum after injection and the like. Based on the defects of the existing chemical sand control system, a sand stabilizing agent which has strong fluidity, convenient injection, small damage to stratum permeability and good sand inhibiting performance is urgently needed to be researched.
Disclosure of Invention
In view of the above, in order to solve the defects of the prior art, the invention provides a polymer sand stabilizer and a preparation method thereof.
The invention discloses a preparation method of a polymer sand stabilizer, which comprises the following steps:
step S1: dissolving a certain amount of 2-acrylamide-2-methylpropanesulfonic acid in water, adjusting the pH value of the obtained 2-acrylamide-2-methylpropanesulfonic acid solution to 7-8, then adding acrylamide, N-substituted water-soluble acrylamide and unsaturated tertiary amine monomers into the solution, controlling the total amount of reaction monomers consisting of the 2-acrylamide-2-methylpropanesulfonic acid, the acrylamide, the N-substituted water-soluble acrylamide and the unsaturated tertiary amine monomers to account for 18-30% of the solution by mass percent, and stirring at the rotating speed of 150r/min for 10min until the monomers are completely dissolved;
step S2: keeping the stirring condition, introducing nitrogen into the solution obtained in the step S1 to remove oxygen for 15-20 min, then adding an initiator, stopping stirring, and reacting at 50-60 ℃ for 4-8 h to obtain transparent gel;
and step S3: and adding absolute ethyl alcohol into the transparent gel, precipitating, crushing and drying to obtain the polymer sand stabilizer.
In one embodiment of the present invention, the unsaturated tertiary amine monomer is one or more selected from the group consisting of N- (3-dimethylaminopropyl) methacrylamide, dimethylaminoethyl methacrylate, N-dimethylacrylamide and N, N-dimethyl-2-methylpropanamide, and among these, N- (3-dimethylaminopropyl) methacrylamide is preferably used.
One embodiment of the present invention is that the N-substituted water-soluble acrylamide is one or more selected from N-ethyl acrylamide, N-hydroxyethyl acrylamide, N- (3-hydroxypropyl) acrylamide, and N- (1, 1-dimethyl-3-oxobutyl) acrylamide, and among them, N- (1, 1-dimethyl-3-oxobutyl) acrylamide is preferably used.
One embodiment of the present invention is that the 2-acrylamido-2-methylpropanesulfonic acid in the reaction monomers accounts for 0.5 to 10% by mass of the total amount, and the preferred amount is 1%.
One embodiment of the present invention is that the unsaturated tertiary amine monomer in the reactive monomers accounts for 3 to 20% of the total amount by mass, and the preferred amount is 9%.
One embodiment of the invention is that the N-substituted water-soluble acrylamide in the reaction monomer accounts for 1-15% of the total amount by mass percent, and the preferable using amount is 8%.
One embodiment of the invention consists in that the total monomer addition of the reactive monomers is 18 to 30% by weight of the total amount, preferably 25%.
It can be seen that the reactive monomers except for the 2-acrylamido-2-methylpropanesulfonic acid monomer, the N-substituted water-soluble acrylamide, and the unsaturated tertiary amine monomer are all acrylamide.
In one embodiment of the present invention, the initiator is azo initiator, and the amount of the initiator is 0.3-0.8% of the total amount of the reaction monomers by mass percent, and the initiator in the present invention includes but is not limited to azo initiator, and the inventors have found through experiments that when azo initiator is used, the sand stabilizer prepared has good water solubility, high relative molecular weight and less residual body, so azo initiator is preferred.
Further, in the above production method, the reaction temperature in step S2 is preferably 55 ℃ and the reaction time is preferably 4 hours.
Further, the drying temperature in step S3 is 70 ℃.
In addition, the polymer sand stabilizer provided by the invention is prepared according to the method.
The invention has the technical effects that:
1. the polymer sand stabilizer provided by the invention can be suitable for sand prevention and fixation in loose sandstone oil fields, can form a film on the surface of rock, stabilizes clay and sand around a shaft, achieves the effect of sand inhibition and fixation, and has good flowing property.
2. The polymer sand stabilizer provided by the invention has simple preparation and construction processes and wide raw material sources, and can be well and widely applied in the sand prevention field of petroleum engineering.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. Wherein:
FIG. 1a shows the leakage of a control group sand sample which is not treated with a sand stabilizing agent in a static sand stabilizing experiment according to the present invention;
FIG. 1b shows the leakage of sand sample treated with sand stabilizer in the static sand stabilization experiment of the present invention.
Detailed Description
The present invention will be further described in detail with reference to the following examples, but the embodiments of the present invention are not limited thereto, wherein the experimental methods used in the following examples are all conventional methods unless otherwise specified; the materials, reagents and the like used therefor are commercially available unless otherwise specified.
Example 1
Adding 0.125g of 2-acrylamide-2-methylpropanesulfonic acid into 75g of water in a beaker, adjusting the pH to 7-8 by using a sodium hydroxide solution, then respectively adding 1g of N- (1, 1-dimethyl-3-oxobutyl) acrylamide, 20.125g of acrylamide and 3.75g of N- (3-dimethylaminopropyl) methacrylamide, starting a stirring rod, adjusting the stirring speed to 150r/min, stirring for 10min, introducing nitrogen to remove oxygen for 15min after reaction monomers are completely dissolved, then adding 0.1g of initiator V-044, stopping stirring, carrying out polymerization reaction for 4h at 55 ℃, adding absolute ethyl alcohol into obtained gel after the reaction is finished, precipitating, crushing until the polymer gel becomes white solid small particles, and drying to obtain a sand stabilizing agent F-1.
Example 2
The present embodiment is different from embodiment 1 in that: in the process of synthesizing the sand stabilizer, the dosage of 2-acrylamide-2-methylpropanesulfonic acid is changed to 2.5g, the dosage of acrylamide is changed to 17.75g, and the dosages of other steps and raw materials are the same, so that the sand stabilizer F-2 is finally prepared.
Example 3
The present embodiment is different from embodiment 1 in that: in the process of synthesizing the sand stabilizer, the dosage of 2-acrylamide-2-methylpropanesulfonic acid is changed to 0.25g, the dosage of acrylamide is changed to 20g, and the dosages of other steps and raw materials are the same, so that the sand stabilizer F-3 is finally prepared.
Example 4
The present embodiment is different from embodiment 1 in that: in the process of synthesizing the sand stabilizer, the dosage of N- (1, 1-dimethyl-3-oxobutyl) acrylamide is changed to 0.5g, the dosage of the acrylamide is changed to 20.625g, and the dosages of other steps and raw materials are the same, so that the sand stabilizer F-4 is finally prepared.
Example 5
The present embodiment is different from embodiment 1 in that: in the process of synthesizing the sand stabilizer, the dosage of N- (1, 1-dimethyl-3-oxobutyl) acrylamide is changed to 2g, the dosage of acrylamide is changed to 19.125g, and the dosages of the other steps and the raw materials are the same, so that the sand stabilizer F-5 is finally prepared.
Example 6
The present embodiment is different from embodiment 1 in that: in the synthetic process of the sand stabilizer, the dosage of N- (3-dimethylaminopropyl) methacrylamide is changed to 0.75g, the dosage of acrylamide is changed to 23.125g, and the dosages of other steps and raw materials are the same, so that the sand stabilizer F-6 is finally prepared.
Example 7
The present embodiment is different from embodiment 1 in that: in the process of synthesizing the sand stabilizer, the dosage of N- (3-dimethylaminopropyl) methacrylamide is changed to 2.25g, the dosage of acrylamide is changed to 21.625g, and the dosages of other steps and raw materials are the same, so that the sand stabilizer F-7 is finally prepared.
Example 8
The present embodiment is different from embodiment 1 in that: in the process of synthesizing the sand stabilizer, the amount of water is changed to 100g, and the other steps and the raw material amount are the same, so that the sand stabilizer F-8 is finally prepared.
Example 9
The present embodiment is different from embodiment 1 in that: in the synthetic process of the sand stabilizer, the using amount of water is changed to 58.3g, and the using amounts of other steps and raw materials are the same, so that the sand stabilizer F-9 is finally prepared.
To further illustrate the product effect, the product performance in the present invention will be evaluated with reference to the following examples.
The sand samples used in the following experiments were taken from a certain oil field in China, all the sand samples were treated, washed and dried before the experiments, and the particle size analysis of the sand samples is shown in table 1.
TABLE 1 Sand sample particle size analysis results
| Particle size, μm | 325-550 | 106-325 | <106 |
| Mass ratio of | 24.5 | 57.3 | 18.2 |
1. Static sand stabilization experiment
Taking 40g of sand sample, 125ml of 500ppm of the sand stabilizer solution in the embodiment 5, putting the sand sample and the sand stabilizer solution in a 250ml separating funnel together, shaking uniformly, and then putting the sand sample and the sand stabilizer solution in a 60 ℃ oven for standing for 24 hours; then the funnel was taken out, the valve was pulled off, and the sand sample was observed for leakage, and a control group without the sand stabilizer was set, and the results are shown in fig. 1.
As can be seen from FIG. 1, the sand sample treated by the sand stabilizer in FIG. 1b only leaks out slightly, while the sand sample in the control group in FIG. 1a is almost completely lost, which proves that the sand stabilizer of the present invention has strong static sand stabilizing capability.
2. Flow test of sand-filled pipe
The damage rate of the sand stabilizing agent to the formation permeability is judged through a sand filling pipe flowing experiment, and under the condition that the sand sample leakage inhibition effect is ensured, the smaller the damage rate is, the smaller the damage to the formation is, and the better the effect is.
The sand-packed pipe flowing experiment comprises the following specific steps:
(1) Filling sand, namely weighing the sand with the same weight each time, and ensuring that the sand sample has similar permeability;
(2) Injecting saline water, and measuring water permeability;
(3) Weighing wet weight, wet-dry weight = pore volume;
(4) Injecting a sand stabilizing agent 1PV, and measuring the injection amount at the outlet end by using a measuring cylinder;
(5) Taking down the sand filling pipe, and putting the sand filling pipe into an oven to age for 24 hours at the temperature of 60 ℃;
(6) The water permeability was measured again and the damage rate was calculated.
The damage rate calculation method is shown as the formula (1):
damage rate = (permeability before injection-permeability after injection)/permeability before injection (1)
The static sand stabilizing ability and the flow test results of the sand-packed pipe of the sand stabilizer are shown in tables 2 to 5, respectively, where table 2 is the performance evaluation test results of the sand stabilizer prepared in examples 1 to 3, table 3 is the performance evaluation test results of the sand stabilizer prepared in example 1 and examples 4 and 5, table 4 is the performance evaluation test results of the sand stabilizer prepared in example 1 and examples 6 and 7, and table 5 is the performance evaluation test results of the sand stabilizer prepared in example 1 and examples 8 and 9.
TABLE 2 static sand-stabilizing ability of sand stabilizer and flow test results of sand-packed pipe (examples 1-3)
As can be seen from Table 2, as the amount of 2-acrylamido-2-methylpropanesulfonic acid increases, the damage rate to the formation permeability decreases first and then increases, and the excessive amount of 2-acrylamido-2-methylpropanesulfonic acid causes great damage to the formation permeability, and from the viewpoint of cost and effect, the sand stabilizer is prepared as the result of the preferred embodiment 3 in which the amount of 2-acrylamido-2-methylpropanesulfonic acid is 1% of the total mass of the reaction monomers.
TABLE 3 static sand-stabilizing ability of sand stabilizer and flow test results of sand-packed pipe (examples 1, 4 and 5)
As can be seen from Table 3, when the amount of N- (1, 1-dimethyl-3-oxobutyl) acrylamide is small, the sand stabilizing capability is poor, and a sand sample leaks out in a static sand stabilizing experiment; with the increasing addition of the N- (1, 1-dimethyl-3-oxobutyl) acrylamide, the sand stabilizing effect is better, the damage to the formation permeability is reduced gradually, and the comprehensive cost and effect are achieved, wherein the sand stabilizing agent is prepared by taking the N- (1, 1-dimethyl-3-oxobutyl) acrylamide as 8% of the total mass of the reaction monomers in the preferred embodiment 5.
TABLE 4 static sand-stabilizing ability of sand stabilizer and flow test result of sand-packed pipe (examples 1, 6 and 7)
As can be seen from Table 4, as the N- (3-dimethylaminopropyl) methacrylamide is added more and more, the damage to the formation permeability is reduced and then increased, and as the N- (3-dimethylaminopropyl) methacrylamide is added too much, the damage to the formation permeability is large, the cost and the effect are combined, and the sand stabilizer is prepared by preferably using N- (3-dimethylaminopropyl) methacrylamide as 9% of the total mass of the reaction monomers in example 7.
TABLE 5 static Sand-stabilizing ability of sand-stabilizing agent and flow test results of sand-packed pipe (examples 1, 8 and 9)
As can be seen from Table 5, when the monomer concentration is too low, the sand stabilizing capability is poor, and a sand sample leaks out in a static sand stabilizing experiment; the sand stabilizing effect becomes better along with the increase of the monomer concentration, and the damage rate to the stratum is also larger and larger. The sand stabilizer is prepared by combining the cost and the effect and preferably adopting the result that the total concentration of the reaction monomers in the embodiment 1 is about 25 percent.
As can be seen from the above, the invention takes 2-acrylamide-2 methylpropanesulfonic acid, N- (3-dimethylaminopropyl) methacrylamide, acrylamide and N- (1, 1-dimethyl-3-oxobutyl) acrylamide as raw materials, and azobisisobutyrimidazoline hydrochloride (V-044) as an initiator, a polymer gel is prepared by aqueous solution polymerization, and then the prepared gel is precipitated by ethanol, crushed and dried to obtain the polymer sand stabilizer, and the prepared polymer sand stabilizer has good prevention and control effects on the sand production problem caused in oil field operation.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the embodiments of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention should be defined by the claims.
Claims (8)
1. A preparation method of a polymer sand stabilizer is characterized by comprising the following steps:
step S1: dissolving a certain amount of 2-acrylamide-2-methylpropanesulfonic acid in water, adjusting the pH value of the obtained 2-acrylamide-2-methylpropanesulfonic acid solution to 7-8, then adding acrylamide, N-substituted water-soluble acrylamide and unsaturated tertiary amine monomers into the solution, controlling the total amount of reaction monomers consisting of the 2-acrylamide-2-methylpropanesulfonic acid, the acrylamide, the N-substituted water-soluble acrylamide and the unsaturated tertiary amine monomers to be 18-30% of the solution by mass percent, and stirring for 10min at the rotating speed of 150r/min until the monomers are completely dissolved;
step S2: keeping the stirring condition, introducing nitrogen into the solution obtained in the step S1 to remove oxygen for 15-20 min, then adding an initiator, stopping stirring, and reacting at 50-60 ℃ for 4-8 h to obtain transparent gel;
and step S3: and adding absolute ethyl alcohol into the transparent gel, precipitating, crushing and drying to obtain the polymer sand stabilizer.
2. The method for preparing a polymeric sand stabilizer according to claim 1, wherein the method comprises the following steps: the unsaturated tertiary amine monomer is one or more of N- (3-dimethylaminopropyl) methacrylamide, dimethylaminoethyl methacrylate, N-dimethylacrylamide and N, N-dimethyl-2-methacrylamide.
3. The method for preparing a polymeric sand stabilizer according to claim 1, wherein the method comprises the following steps: the N-substituted water-soluble acrylamide consists of one or more of N-ethyl acrylamide, N-hydroxyethyl acrylamide, N- (3-hydroxypropyl) acrylamide and N- (1, 1-dimethyl-3-oxobutyl) acrylamide.
4. A method of making a polymeric sand stabilizer according to claim 1, wherein: in the reaction monomer, the 2-acrylamide-2-methylpropanesulfonic acid accounts for 0.5-10% of the total amount by mass percent.
5. The method for preparing a polymeric sand stabilizer according to claim 1, wherein the method comprises the following steps: the unsaturated tertiary amine monomer accounts for 3-20% of the total amount in the reaction monomer in percentage by mass.
6. A method of making a polymeric sand stabilizer according to claim 1, wherein: the N-substituted water-soluble acrylamide in the reaction monomer accounts for 1-15% of the total amount by mass percent.
7. A method of making a polymeric sand stabilizer according to claim 1, wherein: the initiator is azo initiator, and the dosage of the initiator is 0.3 to 0.8 percent of the total amount of the reaction monomers in percentage by mass.
8. A polymeric sand stabilizer prepared according to the method of any one of claims 1 to 7.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050284632A1 (en) * | 2004-06-29 | 2005-12-29 | Dalrymple Eldon D | Methods useful for controlling fluid loss during sand control operations |
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| CN104861110A (en) * | 2015-05-22 | 2015-08-26 | 中国石油集团渤海钻探工程有限公司 | Anti-swelling and sand-inhibiting agent for high-permeability heavy oil reservoir and preparation method of anti-swelling and sand-inhibiting agent |
| CN105694837A (en) * | 2016-04-13 | 2016-06-22 | 中国石油大学(华东) | Polymer sand consolidating agent and preparation method thereof |
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| US20050284632A1 (en) * | 2004-06-29 | 2005-12-29 | Dalrymple Eldon D | Methods useful for controlling fluid loss during sand control operations |
| CN104277804A (en) * | 2014-10-23 | 2015-01-14 | 西南石油大学 | AM-DAAM-AMPS ternary polymer gel particle drive-adjusting reagent and synthesis method thereof |
| CN104861110A (en) * | 2015-05-22 | 2015-08-26 | 中国石油集团渤海钻探工程有限公司 | Anti-swelling and sand-inhibiting agent for high-permeability heavy oil reservoir and preparation method of anti-swelling and sand-inhibiting agent |
| CN105694837A (en) * | 2016-04-13 | 2016-06-22 | 中国石油大学(华东) | Polymer sand consolidating agent and preparation method thereof |
| CN105693925A (en) * | 2016-04-13 | 2016-06-22 | 中国石油大学(华东) | Sand prevention multi-branched polymer for oil-water well and preparation method of sand prevention multi-branched polymer |
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