CN119161863A - A water-soluble resin sand-consolidating agent and its preparation method and application - Google Patents
A water-soluble resin sand-consolidating agent and its preparation method and application Download PDFInfo
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- CN119161863A CN119161863A CN202411669060.2A CN202411669060A CN119161863A CN 119161863 A CN119161863 A CN 119161863A CN 202411669060 A CN202411669060 A CN 202411669060A CN 119161863 A CN119161863 A CN 119161863A
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- sand
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- 239000011347 resin Substances 0.000 title claims abstract description 50
- 229920005989 resin Polymers 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 80
- 239000004576 sand Substances 0.000 claims abstract description 73
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000007596 consolidation process Methods 0.000 claims abstract description 12
- 239000007822 coupling agent Substances 0.000 claims abstract description 12
- 239000003999 initiator Substances 0.000 claims abstract description 12
- 239000002904 solvent Substances 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 239000011159 matrix material Substances 0.000 claims abstract description 9
- 239000003129 oil well Substances 0.000 claims abstract description 8
- 239000012758 reinforcing additive Substances 0.000 claims abstract description 7
- 238000010276 construction Methods 0.000 claims abstract description 5
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims description 34
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical compound C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 claims description 14
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- -1 quinolone aromatic compounds Chemical class 0.000 claims description 11
- 239000007849 furan resin Substances 0.000 claims description 10
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 9
- 239000011259 mixed solution Substances 0.000 claims description 8
- 239000005711 Benzoic acid Substances 0.000 claims description 6
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 6
- 239000005977 Ethylene Substances 0.000 claims description 6
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 6
- 239000001361 adipic acid Substances 0.000 claims description 6
- 235000010233 benzoic acid Nutrition 0.000 claims description 6
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 6
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 claims description 4
- 229920002554 vinyl polymer Polymers 0.000 claims description 4
- NKJOXAZJBOMXID-UHFFFAOYSA-N 1,1'-Oxybisoctane Chemical compound CCCCCCCCOCCCCCCCC NKJOXAZJBOMXID-UHFFFAOYSA-N 0.000 claims description 3
- WDFFWUVELIFAOP-UHFFFAOYSA-N 2,6-difluoro-4-nitroaniline Chemical compound NC1=C(F)C=C([N+]([O-])=O)C=C1F WDFFWUVELIFAOP-UHFFFAOYSA-N 0.000 claims description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- 239000004310 lactic acid Substances 0.000 claims description 3
- 235000014655 lactic acid Nutrition 0.000 claims description 3
- 239000000654 additive Substances 0.000 claims description 2
- 230000000996 additive effect Effects 0.000 claims description 2
- 230000002708 enhancing effect Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 150000004032 porphyrins Chemical class 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 230000035699 permeability Effects 0.000 abstract description 34
- 238000007711 solidification Methods 0.000 abstract description 4
- 230000008023 solidification Effects 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract 2
- 239000002689 soil Substances 0.000 abstract 1
- 238000011049 filling Methods 0.000 description 31
- 230000014759 maintenance of location Effects 0.000 description 10
- 238000002474 experimental method Methods 0.000 description 6
- 238000005086 pumping Methods 0.000 description 6
- 230000001965 increasing effect Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- OCKGFTQIICXDQW-ZEQRLZLVSA-N 5-[(1r)-1-hydroxy-2-[4-[(2r)-2-hydroxy-2-(4-methyl-1-oxo-3h-2-benzofuran-5-yl)ethyl]piperazin-1-yl]ethyl]-4-methyl-3h-2-benzofuran-1-one Chemical compound C1=C2C(=O)OCC2=C(C)C([C@@H](O)CN2CCN(CC2)C[C@H](O)C2=CC=C3C(=O)OCC3=C2C)=C1 OCKGFTQIICXDQW-ZEQRLZLVSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- SLGWESQGEUXWJQ-UHFFFAOYSA-N formaldehyde;phenol Chemical compound O=C.OC1=CC=CC=C1 SLGWESQGEUXWJQ-UHFFFAOYSA-N 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 235000015110 jellies Nutrition 0.000 description 1
- 239000008274 jelly Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/138—Plastering the borehole wall; Injecting into the formation
-
- 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
- C09K8/56—Compositions for consolidating loose sand or the like around wells without excessively decreasing the permeability thereof
- C09K8/57—Compositions based on water or polar solvents
- C09K8/575—Compositions based on water or polar solvents containing organic compounds
- C09K8/5751—Macromolecular compounds
- C09K8/5753—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- 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
- C09K8/56—Compositions for consolidating loose sand or the like around wells without excessively decreasing the permeability thereof
- C09K8/57—Compositions based on water or polar solvents
- C09K8/575—Compositions based on water or polar solvents containing organic compounds
- C09K8/5751—Macromolecular compounds
- C09K8/5755—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
本发明公开了一种水溶性树脂固砂剂及制备方法与应用，属于油井化学防砂技术领域，所述水溶性树脂固砂剂包括以下质量百分比的原料：树脂基体：5～10%；增溶剂：5～10%；引发剂：1～3%；偶联剂：0.5～2%；固化剂：0.2～0.5%；增强添加剂：2～3%；余量为水；本发明提出一种水溶性树脂固砂剂在易出砂的疏松砂岩油藏油井、水井或气井的固砂施工中的应用，适应地层温度为35～150℃。本发明的固砂剂是水溶性的，固化后与地层沙土结合紧密，具有较高的固结强度和较高的渗透率，即可高强度固砂同时可保持油层的较高渗透性，能大大提高油水井现场作业的成功率。The present invention discloses a water-soluble resin sand-fixing agent and a preparation method and application thereof, belonging to the technical field of chemical sand control of oil wells. The water-soluble resin sand-fixing agent comprises the following raw materials in mass percentage: resin matrix: 5-10%; solubilizer: 5-10%; initiator: 1-3%; coupling agent: 0.5-2%; curing agent: 0.2-0.5%; reinforcing additive: 2-3%; the balance is water; the present invention proposes an application of a water-soluble resin sand-fixing agent in the sand-fixing construction of oil wells, water wells or gas wells in loose sandstone reservoirs that are prone to sand production, and the application of the sand-fixing agent is adapted to the formation temperature of 35-150°C. The sand-fixing agent of the present invention is water-soluble, and after solidification, it is tightly combined with the formation sand and soil, has a high consolidation strength and a high permeability, that is, it can fix sand with high strength while maintaining the high permeability of the oil layer, and can greatly improve the success rate of on-site operations of oil and water wells.
Description
Technical Field
The invention relates to the technical field of oil well chemical sand prevention, in particular to a water-soluble resin sand-fixing agent, a preparation method and application thereof.
Background
In the middle and later stages of oil field development, injected water is injected along the high permeable layer, the low permeable oil layer is repeatedly and manually fractured, and each deposition unit of the oil layer is seriously flooded. The water content of the oil well rises, and the oil well is flooded prematurely. The reservoir is flushed by high-speed flow for a long time, the sandstone skeleton structure is damaged, the loss of the reservoir is increased year by year, and the temperature of the oil layer is generally reduced. The method solves the problem of consolidation of the reservoir sand under the low-temperature, medium-low-mineralization water-containing conditions, fully plays the supporting role, increases the seepage capability of the reservoir, improves the yield and injection increasing effect of the oil-water well, and fundamentally prevents the sand production problem.
Currently, sand-fixing agents used in oil wells are mainly of jelly type, dispersion type, precipitation type, gel type and resin type. These types of sand-fixing agents have certain sand-fixing properties, but these sand-fixing agents have the following problems in practical application:
1. The cured product has higher consolidation strength but lower permeability;
2. the permeability after curing is higher, but the consolidation strength is lower;
After the sand-fixing agent has the problems, the oil-water well either reduces the yield or produces sand, so that the field effect and the economic benefit are greatly influenced.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a water-soluble resin sand fixing agent, a preparation method and application thereof.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
In a first aspect, the invention provides a water-soluble resin sand-fixing agent, which comprises the following raw materials in percentage by mass:
5-10% of a resin matrix;
5-10% of solubilizer;
1-3% of an initiator;
0.5-2% of coupling agent;
0.2-0.5% of curing agent;
2-3% of an enhancing additive;
The balance being water.
Further, the resin matrix is aqueous phenolic furan resin, and the aqueous phenolic furan resin is XYH-FF900 aqueous phenolic furan resin produced by XYH-FF She Hao chemical industry Co.
Further, the solubilizer is low molecular weight glycidyl ether, and the low molecular weight glycidyl ether is one or a mixture of a plurality of 1, 6-adipic acid glycidyl ether and trimethylolpropane glycidyl ether.
Further, the initiator is one or a mixture of a plurality of porphyrin and quinolone aromatic compounds.
Further, the coupling agent is one or a mixture of more of 2-hydroxyethyl methacrylate phosphate, di (dioctyl oxygen pyrophosphato) ethylene titanate and distearoyl oxygen isopropyl aluminate.
Further, the curing agent is one or a mixture of a plurality of lactic acid, benzoic acid and acrylic acid.
Further, the reinforcing additive is one or a mixture of more of polyvinyl alcohol and polyvinyl formal.
In a second aspect, the invention provides a preparation process of a water-soluble resin sand fixing agent, which comprises the following preparation process steps:
Weighing the raw materials according to the mass percentage, adding a resin matrix, a reinforcing additive and a solubilizer into a first container with stirring, and uniformly stirring and mixing;
Step two, adding an initiator, a coupling agent, a curing agent and the balance of water into another second container with stirring, and uniformly stirring and mixing;
And thirdly, pouring the mixed solution in the second container into the first container, and stirring and mixing uniformly to obtain the water-soluble resin sand fixing agent.
Further, in the first step, stirring is carried out for 30-60 minutes at the speed of 1000-2000 rpm, in the second step, stirring is carried out for 5-10 minutes at the speed of 1000-2000 rpm, and in the third step, stirring is carried out for 10-20 minutes at the speed of 1000-2000 rpm.
In a third aspect, the invention provides an application of a water-soluble resin sand-fixing agent in sand-fixing construction of an oil well, a water well or a gas well of a loose sandstone oil reservoir easy to produce sand, which is suitable for stratum temperature of 35-150 ℃, and when the application is carried out, the water-soluble resin sand-fixing agent is injected into a target layer by a pump truck, and is solidified for 1-3 days for normal production after well closing.
The invention has the following technical effects:
the sand-fixing agent is water-soluble, is tightly combined with stratum sand after solidification, has higher consolidation strength and higher permeability, can fix sand with high strength, can keep higher permeability of an oil layer, and can greatly improve the success rate of field operation of an oil-water well.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments.
Example 1A process for preparing a water-soluble resin sand-fixing agent comprises the steps of adding 10g of aqueous phenolic furan resin, 4g of polyvinyl alcohol and 10g of 1, 6-adipic acid glycidyl ether into a first container, stirring thoroughly for 30 minutes at the speed of 1000 revolutions per minute, adding 2g of quinolone aromatic compound, 1g of bis (dioctyl-oxy-pyrophosphato) ethylene titanate, 0.4g of benzoic acid and 172.6g of water into a second container, stirring thoroughly for 5 minutes at the speed of 1000 revolutions per minute, pouring the mixed solution in the second container into the first container, and stirring thoroughly for 10 minutes at the speed of 1000 revolutions per minute to obtain the water-soluble resin sand-fixing agent.
The initial viscosity of the sand fixing agent prepared in the embodiment is 4.6 mPa.s after detection.
The sand-fixing agent prepared in the embodiment is subjected to pressure plugging experiments, namely a sand filling pipe with the length of 30cm and the diameter of 25mm is taken, fine sand with the size of 280-320 meshes is filled, the filling is tight, and the permeability is measured to be 2.0 mu m 2. Slowly injecting the prepared sand-fixing agent into the sand filling pipe, and stopping pumping when the sand-fixing agent flows out from the outlet end. The two ends of the sand filling pipe are sealed, the sand filling pipe is heated to 60 ℃ and kept at constant temperature for 48 hours, and after the sand filling pipe is cooled to room temperature, the measured permeability is 1.82 mu m 2, and the permeability retention rate reaches 91%. The compressive strength was measured to be 6.7MPa.
Example 2A preparation method of a water-soluble resin sand-fixing agent provided by the invention comprises the steps of adding 13g of water-soluble phenolic furan resin, 4g of polyvinyl alcohol and 10g of 1, 6-adipic acid glycidyl ether into a first container, fully stirring for 30 minutes at the speed of 1000 revolutions per minute, adding 3g of quinolone aromatic compound, 2g of bis (dioctyl-oxy-pyrophosphato) ethylene titanate, 0.4g of benzoic acid and 167.6g of water into a second container, fully stirring for 5 minutes at the speed of 1000 revolutions per minute, pouring the mixed solution in the second container into the first container, and fully stirring for 10 minutes at the speed of 1000 revolutions per minute to obtain the water-soluble resin sand-fixing agent.
The initial viscosity of the sand fixing agent prepared in this example was 7.1 mPa.s.
The sand-fixing agent prepared in the embodiment is subjected to pressure plugging experiments, namely a sand filling pipe with the length of 30cm and the diameter of 25mm is taken, fine sand with the size of 280-320 meshes is filled, the filling is tight, and the permeability is measured to be 1.91 mu m 2. Slowly injecting the prepared sand-fixing agent into the sand filling pipe, and stopping pumping when the sand-fixing agent flows out from the outlet end. The two ends of the sand filling pipe are sealed, the temperature is kept at 60 ℃ for 48 hours, and after the sand filling pipe is cooled to room temperature, the measured permeability is 1.643 mu m 2, and the permeability retention rate reaches 86%. The compressive strength was measured to be 9.8MPa.
Example 3A preparation method of a water-soluble resin sand-fixing agent provided by the invention comprises the steps of adding 16g of water-soluble phenolic furan resin, 4g of polyvinyl alcohol and 10g of solubilizer 1, 6-adipic acid glycidyl ether into a first container, fully stirring for 30 minutes at the speed of 1000 revolutions per minute, adding 4g of quinolone aromatic compound, 3g of bis (dioctyl oxy pyrophosphato) ethylene titanate, 0.4g of benzoic acid and 162.6g of water into a second container, fully stirring for 5 minutes at the speed of 1000 revolutions per minute, pouring the mixed solution in the second container into the first container, and fully stirring for 10 minutes at the speed of 1000 revolutions per minute to obtain the water-soluble resin sand-fixing agent.
The initial viscosity of the sand fixing agent prepared in this example was 7.1 mPa.s.
The sand-fixing agent prepared in the embodiment is subjected to pressure plugging experiments, namely a sand filling pipe with the length of 30cm and the diameter of 25mm is taken, fine sand with the size of 280-320 meshes is filled, the filling is tight, and the permeability is measured to be 1.91 mu m 2. Slowly injecting the prepared sand-fixing agent into the sand filling pipe, and stopping pumping when the sand-fixing agent flows out from the outlet end. The two ends of the sand filling pipe are sealed, the temperature is kept at 60 ℃ for 48 hours, and after the sand filling pipe is cooled to room temperature, the measured permeability is 1.643 mu m 2, and the permeability retention rate reaches 86%. The compressive strength was measured to be 9.8MPa.
Example 4A process for preparing a water-soluble resin sand-fixing agent according to the invention comprises the steps of adding 20g of aqueous phenolic furan resin, 4g of polyvinyl alcohol and 10g of 1, 6-adipic acid glycidyl ether into a first container, stirring thoroughly for 30 minutes at a speed of 1000 revolutions per minute, adding 5g of quinolone aromatic compound, 4g of bis (dioctyl-oxy-pyrophosphato) ethylene titanate, 0.4g of benzoic acid and 156.6g of water into a second container, stirring thoroughly for 5 minutes at a speed of 1000 revolutions per minute, pouring the mixed solution in the second container into the first container, and stirring thoroughly for 10 minutes at a speed of 1000 revolutions per minute to obtain the water-soluble resin sand-fixing agent.
The initial viscosity of the sand fixing agent prepared in this example was 7.1 mPa.s.
The sand-fixing agent prepared by the embodiment is subjected to pressure plugging experiments, namely a sand filling pipe with the length of 30cm and the diameter of 25mm is taken, fine sand with 280-320 meshes is filled, the filling is tight, and the permeability is measured to be 1.98 mu m 2. Slowly injecting the prepared sand-fixing agent into the sand filling pipe, and stopping pumping when the sand-fixing agent flows out from the outlet end. The two ends of the sand filling pipe are sealed, the temperature is kept at 60 ℃ for 48 hours, and after the sand filling pipe is cooled to room temperature, the measured permeability is 1.624 mu m 2, and the permeability retention rate reaches 82%. The compressive strength was measured to be 12.6MPa.
As can be seen from examples 1-4, increasing the amounts of resin, initiator, and coupling agent, the compressive strength of the final consolidated body formed was significantly increased, but the permeability also showed a tendency to decrease. In the field construction process, the stratum is required to be consolidated and can keep enough strength of 8MPa, and the permeability damage to the stratum is required to be lower by more than 85 percent. Therefore, the dosages of the resin, the initiator and the coupling agent are timely adjusted according to the sand production degree and the sand production quantity of different wells on site, so that the best implementation effect is achieved.
Example 5A preparation method of a water-soluble resin sand-fixing agent provided by the invention comprises the steps of adding 15g of water-soluble phenolic furan resin, 6g of polyvinyl formal and 15g of trimethylolpropane glycidyl ether into a container, fully stirring for 40 minutes at a speed of 1500 rpm, adding 3g of porphyrin aromatic compound, 1.5g of 2-hydroxyethyl methacrylate phosphate, 0.6g of lactic acid and 158.9g of water into a second container, fully stirring for 8 minutes at a speed of 1500 rpm, pouring the mixed solution in the second container into the first container, and fully stirring for 15 minutes at a speed of 1500 rpm to obtain the water-soluble resin sand-fixing agent.
The initial viscosity of the sand fixing agent prepared in this example was 6.3 mPa.s.
The sand-fixing agent prepared by the embodiment is subjected to pressure plugging experiments, namely a sand filling pipe with the length of 30cm and the diameter of 25mm is taken, and fine sand with 380-420 meshes is filled in the sand filling pipe, so that the sand filling pipe is tightly filled. The measured permeability was 1.13 μm 2. Slowly injecting the prepared sand-fixing agent into the sand filling pipe, and stopping pumping when the sand-fixing agent flows out from the outlet end. Sealing two ends of the sand filling pipe, heating to 60 ℃ and keeping the temperature for 48 hours, and cooling to room temperature, wherein the measured permeability is 0.98 mu m 2, and the permeability retention rate reaches 87%. The compressive strength was measured to be 9.8MPa.
Example 6A process for preparing a water-soluble resin sand-fixing agent according to the present invention comprises adding 20g of a water-soluble phenol-formaldehyde furan resin, 6g of a polyvinyl formal and 20g of trimethylolpropane glycidyl ether into a container, stirring thoroughly for 60 minutes at a speed of 2000 rpm, adding 6g of a quinolone aromatic compound, 4g of distearoyl isopropyl aluminate, 1g of acrylic acid and 143g of water into another second container, stirring thoroughly for 10 minutes at a speed of 2000 rpm, pouring the mixed solution in the second container into a first container, and stirring thoroughly for 20 minutes at a speed of 2000 rpm to obtain a water-soluble resin sand-fixing agent.
The initial viscosity of the sand fixing agent prepared in the embodiment is 8.2 mPa.s after detection.
The sand-fixing agent prepared by the embodiment is subjected to pressure plugging experiments, namely, a sand filling pipe with the length of 30cm and the diameter of 25mm is taken, and fine sand with the mesh of 280-320 and the mesh of 380-420=1:1 is filled in the sand filling pipe, so that the sand filling pipe is tightly filled. The measured permeability was 1.38 μm 2. Slowly injecting the prepared sand-fixing agent into the sand filling pipe, and stopping pumping when the sand-fixing agent flows out from the outlet end. The two ends of the sand filling pipe are sealed, heated to 60 ℃ and kept at constant temperature for 48 hours, and after cooling to room temperature, the measured permeability is 1.17 mu m 2, and the permeability retention rate reaches 85%. The compressive strength was measured to be 11.3MPa.
As can be seen from examples 1 to 6, the types of the coupling agent, the initiator, the reinforcing agent and the solubilizer are adjusted within the scope of the patent requirements, the strength of the formed consolidated body is above 5MPa, and the permeability retention rate is above 80%.
Comparative example the sand consolidation agent prepared in the room according to CN 115572592A example 1 had a compressive strength of 5.8MPa and a permeability retention of 73%. The sand consolidation agent prepared indoors according to the example provided by CN 102838975A had a strength of 7.2MPa and a permeability retention of 62%.
Therefore, the preparation method of the sand fixing agent provided by the application has remarkable advantages in the aspects of compressive strength and permeability.
The resin matrix, the initiator, the curing agent and the reinforcing additive of the water-soluble sand-fixing agent react with each other in the stratum to form a networked high-strength resin structure, the resin structure is fully combined with the sand surface in the stratum under the action of the coupling agent to form a high-strength consolidated body, and the solubilizer and water can be gradually separated out after the reaction, so that the consolidated stratum still maintains higher permeability.
The resin matrix and the curing agent are subjected to polymerization reaction at the temperature of 35-120 ℃ under the action of an initiator to form high-molecular networked space resin, and the high-strength resin structure is formed by the high-molecular networked space resin and the reinforcing additive, wherein one end of an organic group of the coupling agent reacts with the resin structure, and one end of an ester group reacts with hydroxyl on the surface of sand grains in a hydrolysis manner, so that the resin of the space networked structure and the stratum sand grains are firmly combined together through chemical bonds to form a high-strength consolidated body, and the purposes of preventing sand grains from moving and producing sand in the stratum are achieved. The solubilizer and water do not participate in the reaction and can be gradually separated out, the solubilizer and the water occupy more than 70% of the formulation of the sand fixing agent, and after separation, the consolidated body forms a large number of pores, so that the stratum after consolidation still has higher permeability.
The water-soluble sand-fixing agent sand control technology is applied for more than 500 times in a cumulative way, and is applied to winning oil extraction plants, middle sea oil, liaohe, hong Kong, western oil areas and foreign parts. The sand-fixing agent has no solid phase before solidification, is easy to enter stratum, effectively seals a water outlet layer, and concretes and disperses sand, and has high concretion strength and good permeability after concretion. The technical advantages are mainly as follows:
1. the self viscosity of the sand fixing agent is lower than 10 mPa.s;
2. the consolidation strength of the sand consolidation agent is 5-15 MPa, and the permeability retention rate reaches more than 80%;
3. The consolidation effect can be generated after stratum sand is encountered, so that the construction safety is facilitated;
4. The sand-fixing agent is not solidified at the normal temperature of 25 ℃, the minimum reaction temperature is 35 ℃, and the maximum temperature resistance is 150 ℃;
5. the use is convenient and reliable, and the solidification time is easy to control within 1-3 days.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (5)
1. The water-soluble resin sand-fixing agent is characterized by comprising the following raw materials in percentage by mass:
5-10% of a resin matrix;
5-10% of solubilizer;
1-3% of an initiator;
0.5-2% of coupling agent;
0.2-0.5% of curing agent;
2-3% of an enhancing additive;
the balance being water;
The resin matrix is aqueous phenolic furan resin;
The solubilizer is low molecular weight glycidyl ether;
the initiator is one or a mixture of more of porphyrin and quinolone aromatic compounds;
The coupling agent is one or a mixture of more of 2-hydroxyethyl methacrylate phosphate, di (dioctyl oxygen pyrophosphato) ethylene titanate and distearoyl oxygen isopropyl aluminate;
The curing agent is one or a mixture of a plurality of lactic acid, benzoic acid and acrylic acid;
the reinforcing additive is one or a mixture of more of polyvinyl alcohol and polyvinyl formal.
2. The water-soluble resin sand consolidation agent according to claim 1, wherein the low molecular weight glycidyl ether is one or a mixture of several of 1, 6-adipic acid glycidyl ether and trimethylolpropane glycidyl ether.
3. A process for preparing the water-soluble resin sand fixing agent as claimed in claim 1 or 2, which is characterized by comprising the following preparation process steps:
Weighing the raw materials according to the mass percentage, adding a resin matrix, a reinforcing additive and a solubilizer into a first container with stirring, and uniformly stirring and mixing;
Step two, adding an initiator, a coupling agent, a curing agent and the balance of water into another second container with stirring, and uniformly stirring and mixing;
And thirdly, pouring the mixed solution in the second container into the first container, and stirring and mixing uniformly to obtain the water-soluble resin sand fixing agent.
4. The process for preparing a water-soluble resin sand-fixing agent according to claim 3, wherein the first step is a step of stirring for 30 to 60 minutes at a speed of 1000 to 2000 rpm, the second step is a step of stirring for 5 to 10 minutes at a speed of 1000 to 2000 rpm, and the third step is a step of stirring for 10 to 20 minutes at a speed of 1000 to 2000 rpm.
5. The application of the water-soluble resin sand-fixing agent is characterized in that the application of the water-soluble resin sand-fixing agent in the sand-fixing construction of an oil well, a water well or a gas well of a loose sandstone reservoir easy to produce sand is suitable for stratum temperature of 35-150 ℃.
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| WO1997034073A1 (en) * | 1996-03-15 | 1997-09-18 | Mobil Oil Corporation | A water compatible chemical in situ sand consolidation with furan resin |
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| CN110117347A (en) * | 2019-04-28 | 2019-08-13 | 陕西科技大学 | A kind of aqueous furan sand consolidation host agent and preparation method thereof and sand-fixating agent |
| CN112222351A (en) * | 2020-09-28 | 2021-01-15 | 宁夏共享化工有限公司 | Furan resin and production method thereof |
| CN115572592A (en) * | 2021-06-21 | 2023-01-06 | 中国石油天然气股份有限公司 | Thin oil well sand consolidation agent and preparation method thereof |
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| US4694905A (en) * | 1986-05-23 | 1987-09-22 | Acme Resin Corporation | Precured coated particulate material |
| WO1997034073A1 (en) * | 1996-03-15 | 1997-09-18 | Mobil Oil Corporation | A water compatible chemical in situ sand consolidation with furan resin |
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| CN119161863B (en) | 2025-03-11 |
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