CN110684517B - Self-polymerization consolidation compression-resistant permeation-increasing temperature-resistant sand control agent - Google Patents
Self-polymerization consolidation compression-resistant permeation-increasing temperature-resistant sand control agent Download PDFInfo
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- CN110684517B CN110684517B CN201911013520.5A CN201911013520A CN110684517B CN 110684517 B CN110684517 B CN 110684517B CN 201911013520 A CN201911013520 A CN 201911013520A CN 110684517 B CN110684517 B CN 110684517B
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- 239000004576 sand Substances 0.000 title claims abstract description 103
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 98
- 238000007596 consolidation process Methods 0.000 title claims abstract description 37
- 238000006116 polymerization reaction Methods 0.000 title claims abstract description 15
- 230000006835 compression Effects 0.000 title description 3
- 238000007906 compression Methods 0.000 title description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 111
- 239000003822 epoxy resin Substances 0.000 claims abstract description 43
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 43
- 229920005989 resin Polymers 0.000 claims abstract description 37
- 239000011347 resin Substances 0.000 claims abstract description 37
- 150000001875 compounds Chemical class 0.000 claims abstract description 25
- 239000000945 filler Substances 0.000 claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 21
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 20
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 20
- 239000011707 mineral Substances 0.000 claims abstract description 20
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 20
- 239000005011 phenolic resin Substances 0.000 claims abstract description 20
- 229920006316 polyvinylpyrrolidine Polymers 0.000 claims abstract description 17
- 239000007822 coupling agent Substances 0.000 claims abstract description 15
- AUHHYELHRWCWEZ-UHFFFAOYSA-N tetrachlorophthalic anhydride Chemical compound ClC1=C(Cl)C(Cl)=C2C(=O)OC(=O)C2=C1Cl AUHHYELHRWCWEZ-UHFFFAOYSA-N 0.000 claims abstract description 14
- JYMVSZGJZRQOFY-UHFFFAOYSA-N (4-nitrobenzoyl) 4-nitrobenzoate Chemical group C1=CC([N+](=O)[O-])=CC=C1C(=O)OC(=O)C1=CC=C([N+]([O-])=O)C=C1 JYMVSZGJZRQOFY-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 229920006282 Phenolic fiber Polymers 0.000 claims abstract description 12
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 9
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 9
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 9
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052814 silicon oxide Inorganic materials 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 24
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 claims description 20
- MQWFLKHKWJMCEN-UHFFFAOYSA-N n'-[3-[dimethoxy(methyl)silyl]propyl]ethane-1,2-diamine Chemical group CO[Si](C)(OC)CCCNCCN MQWFLKHKWJMCEN-UHFFFAOYSA-N 0.000 claims description 8
- 239000000244 polyoxyethylene sorbitan monooleate Substances 0.000 claims description 8
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 claims description 8
- 229920000053 polysorbate 80 Polymers 0.000 claims description 8
- 239000004593 Epoxy Substances 0.000 claims description 6
- 229920001577 copolymer Polymers 0.000 claims description 2
- 239000003960 organic solvent Substances 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 238000013329 compounding Methods 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 description 30
- 230000035699 permeability Effects 0.000 description 19
- 238000012360 testing method Methods 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 14
- 239000007789 gas Substances 0.000 description 12
- 238000007711 solidification Methods 0.000 description 12
- 230000008023 solidification Effects 0.000 description 12
- 239000003921 oil Substances 0.000 description 10
- 239000002131 composite material Substances 0.000 description 7
- 238000011835 investigation Methods 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 7
- ZERKZGMHHAETRU-IUJXYRIYSA-L disodium (Z)-but-2-enedioate styrene Chemical group [Na+].[Na+].C=CC1=CC=CC=C1.[O-]C(=O)\C=C/C([O-])=O ZERKZGMHHAETRU-IUJXYRIYSA-L 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000011056 performance test Methods 0.000 description 5
- 230000002265 prevention Effects 0.000 description 5
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- NOGFHTGYPKWWRX-UHFFFAOYSA-N 2,2,6,6-tetramethyloxan-4-one Chemical compound CC1(C)CC(=O)CC(C)(C)O1 NOGFHTGYPKWWRX-UHFFFAOYSA-N 0.000 description 2
- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 description 2
- 150000008065 acid anhydrides Chemical class 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 150000008064 anhydrides Chemical class 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical compound CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 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
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
Classifications
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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
- C09K8/56—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
- C09K8/5756—Macromolecular compounds containing cross-linking agents
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/42—Polycarboxylic acids; Anhydrides, halides or low molecular weight esters thereof
- C08G59/423—Polycarboxylic acids; Anhydrides, halides or low molecular weight esters thereof containing an atom other than oxygen belonging to a functional groups to C08G59/42, carbon and hydrogen
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Mold Materials And Core Materials (AREA)
- Epoxy Resins (AREA)
Abstract
The invention discloses a self-polymerization consolidation pressure-resistant permeation-increasing temperature-resistant sand control agent, which comprises the following components: a resin compound system, a coupling agent, an organic solvent, an emulsifier, a filler and a curing agent; the weight percentage of each component is as follows: 30-40% of a resin compound system; 40-50% of an organic solvent; 5-7% of a coupling agent; 5-8% of a filler; 4-5% of curing agent and 5-8% of emulsifier, wherein the sum of the mass percentages of the components is 100%. The curing agent is p-nitrobenzoic anhydride and tetrachlorophthalic anhydride which are mixed by equal mass; the filler is high-temperature-resistant multi-mineral fine powder and phenolic fiber; the high temperature resistant multi-mineral fine powder is a mixture of magnesium oxide, aluminum oxide and silicon oxide. The resin compound system is prepared by compounding epoxy resin E-44, epoxy resin E-51, phenolic resin F-51 and polyvinylpyrrolidone K30. The sand control agent is mainly used for chemical sand control of high-temperature and high-pressure wells, can be injected into a stratum under the condition of no moving of a pipe column, and achieves the purpose of sand control and sand fixation.
Description
Technical Field
The invention relates to the technical field of oil and gas field development, in particular to a self-polymerization consolidation pressure-resistant permeation-increasing temperature-resistant sand control agent for chemical sand control of a high-temperature and high-pressure well.
Background
In oil exploitation, the sand production harm of an oil well and a water well is great, if the oil, gas and water layers are buried by sand, the oil well and the gas well stop production, the water well stops injection, the underground operation and the equipment maintenance or replacement are frequent, and the production cost is increased. If a large amount of sand is produced, the stratum is seriously lacked, a cavity is easily formed outside a casing pipe of the reservoir stratum, the stratum collapses, the casing pipe is broken and deformed, and even a well is scrapped. Therefore, the sand control of the sand production well is the primary measure for ensuring the normal production of the oil field.
Compared with the conventional oil and gas field, the shale gas development potential is huge, however, the sand prevention and consolidation work is always a difficult problem in shale gas exploitation. After large-scale volume fracturing, a large amount of fracturing sand enters a stratum, and because the fracturing sand cannot be completely compacted, the flow-back fluid and the high-speed natural gas carry the proppant to the ground, and high-speed scouring and abrasion are generated on a ground manifold and an oil nozzle, so that the service life of corresponding equipment is greatly shortened. Therefore, compared with the conventional oil and gas well, the shale gas well not only needs to overcome the influence of high temperature and high pressure, but also more importantly solves the difficult problems of good sand prevention and control.
The chemical sand control can bond discrete sand grains, stabilize the stratum structure, achieve the purpose of treating both symptoms and root causes, and has the irreplaceable superiority of other sand control measures. However, the traditional chemical sand control agent is only suitable for sand control operation of medium and low temperature reservoirs due to low curing temperature, high curing speed, poor temperature resistance of the generated consolidation body and low compressive strength. Adopt acid anhydride class sand consolidation agent can improve the temperature resistance of resin, however, traditional acid anhydride class curing agent is mostly solid state under the normal atmospheric temperature because the melting point is too high, brings certain degree of difficulty for field operation, and in the sand control operation of super high temperature well, resin consolidation speed is too fast under the high temperature condition, easily appears the risk of sand control agent solidification before getting into the target course prerequisite to influence the effect of sand control sand consolidation. Aiming at the difficult problem of sand prevention and sand consolidation of the high-temperature and high-pressure shale gas well, higher requirements are provided for the aspects of the solidification temperature, the solidification speed, the compressive strength, the temperature resistance and the like of the sand prevention agent.
Disclosure of Invention
The invention aims to provide a self-polymerization consolidation pressure-resistant permeation-increasing temperature-resistant sand control agent for a high-temperature and high-pressure well.
The invention provides a self-polymerization consolidation pressure-resistant permeation-resistant sand control agent, which comprises the following components:
a resin compound system, a coupling agent, an organic solvent cyclohexanone, an emulsifier, a filler and a curing agent. The weight percentage of each component is as follows: 30-40% of a resin compound system; 40-50% of an organic solvent; 5-7% of a coupling agent; 5-8% of a filler; 4-5% of curing agent and 5-8% of emulsifier, wherein the sum of the mass percentages of the components is 100%.
Wherein the curing agent is p-nitrobenzoic anhydride and tetrachlorophthalic anhydride which are mixed in equal mass ratio.
The filler is a compound of high-temperature-resistant multi-mineral fine powder and phenolic fiber in a mass ratio of 4: 1-3: 1. The high temperature resistant multi-mineral fine powder is a mixture of magnesium oxide, aluminum oxide and silicon oxide.
The resin compound system comprises the following components in percentage by mass: 20-30% of epoxy resin E-44, 20-30% of epoxy resin E-51, 30-40% of phenolic resin F-51 and 5-10% of polyvinylpyrrolidone K30. Epoxy resin E-44 is a light yellow to tan high viscosity transparent liquid with an epoxy equivalent: 210-244 g/Eq; the epoxy resin E-51 is transparent liquid, and the epoxy equivalent is 184-210 g/Eq; the phenolic resin F-51 is yellow viscous liquid, and the epoxy equivalent is 175-185 g/Eq; the polyvinylpyrrolidone is white powder with K30, and the K value is as follows: 27-32.4, molecular weight: 45000-58000.
The coupling agent is N-aminoethyl-3-aminopropylmethyldimethoxysilane.
The emulsifier is a mixture of styrene-sodium maleate copolymer and polyoxyethylene sorbitan monooleate according to the mass ratio of 1: 1.
The preparation method of the self-polymerization consolidation pressure-resistant seepage-increasing temperature-resistant sand control agent comprises the following steps:
firstly, preparing a resin compound system: at normal temperature, epoxy resin E-44, epoxy resin E-51, phenolic resin F-51 and polyvinylpyrrolidone K30 are mixed and compounded in proportion to obtain a resin compounding system. In a resin compound system, the contents of all components are as follows: 20-30% of epoxy resin E-44, 20-30% of epoxy resin E-51, 30-40% of phenolic resin F-51 and 5-10% of polyvinylpyrrolidone K30, wherein the percentage contents of the components are all mass percentages, and the sum of the percentage contents of the components is 100%.
Secondly, preparing a self-polymerization consolidation pressure-resistant permeation-increasing temperature-resistant sand control agent: uniformly mixing the components in proportion to prepare a liquid sand control agent; wherein, the contents of each component are as follows: 30-40% of a resin compound system; 40 to 50 percent of solvent; 5 to 7 percent of coupling agent; 5 to 8 percent of filler; 4-5% of curing agent and 5-8% of emulsifier, wherein the contents of all the components are mass percent, and the sum of the percentages of all the components is 100%.
When the sand control agent is used in construction, the liquid sand control agent is prepared on the ground on site, and then the liquid sand control agent is injected into a stratum.
Compared with the prior art, the invention has the advantages that:
(1) because three kinds of resin in the resin complex system used have better mutual promotion function, can all promote the combination with the sand grain surface effectively, and contain a large amount of polar groups in the resin molecule, can form a large amount of hydrogen bonds with hydroxyl on the sand grain surface, can form covalent bond connection after dehydrating under the stratum temperature, because the molecular structure is relatively regular, can form a firm adsorption film on the sand grain surface, play the role of sand control; selecting phenolic resin with high heat resistance and epoxy resin with high strength to prepare a high-temperature-resistant and high-strength mixed resin sand control agent; the cyclohexanone with high boiling point is used as a solvent, so that the thermal stability of the sand control agent is improved. The cyclohexanone with high boiling point is used as a solvent, so that the thermal stability of the sand control agent is improved.
(2) The curing agent is prepared from p-nitrobenzoic anhydride and tetrachlorophthalic anhydride which are mixed according to equal mass ratio. The novel anhydride curing agent is liquid at normal temperature, and is favorable for field operation. The p-nitrobenzoic anhydride contains nitro, so that the decomposition temperature of the reactant of the sand control agent is increased, the solidification speed of the sand control agent at high temperature is slowed down, and the field operation time is prolonged. Meanwhile, as the curing speed is slowed down, the thermal decomposition rate of the resin is reduced, the thermal degradation of the resin at high temperature is delayed, the carbon forming amount of the sand-fixing agent material at high temperature is increased, and the curing strength is further improved. The tetrachlorophthalic anhydride is a product of chlorination reaction of phthalic anhydride, and compared with phthalic anhydride, the speed of curing reaction of the agent and epoxy resin is slowed down, so that the high-temperature stability of the epoxy resin is improved; the ether bond generated after the reaction of the anhydride group and the epoxy resin enhances the wettability and the adhesion of the resin, and the introduction of the benzene ring ensures that the solidified resin has better heat resistance and rigidity.
(3) The high-temperature-resistant multi-mineral fine powder and the phenolic fiber are used as fillers, and the phenolic fiber can increase the toughness of the resin adhesive, further enhance the temperature resistance and improve the compressive strength; and the high-temperature-resistant coupling agent is adopted, so that the heat resistance and the high adhesion performance of the resin adhesive are improved. The components are adjusted in proportion, so that the sand control agent can be applied to the field of sand control of high-temperature and high-pressure oil and gas wells in oil fields, and the application effect on sand control and consolidation of shale gas wells is particularly remarkable.
(4) The self-polymerization consolidation compression-resistant permeation-increasing temperature-resistant sand control agent has good temperature resistance (can resist the high temperature of 360 ℃) and high permeability (the permeability is more than or equal to 96 mu m)2) The high-pressure-resistant composite sand-preventing agent has high compressive strength (the strength is more than or equal to 60MPa), can be injected into a stratum under the condition of no moving of a tubular column, plays the roles of preventing sand and fixing sand, and can be widely applied to the field of sand prevention of high-temperature and high-pressure oil and gas wells.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.
Example 1
The preparation method of the sand control agent comprises the following steps:
at normal temperature, mixing epoxy resin E-44, epoxy resin E-51, phenolic resin F-51 and polyvinylpyrrolidone K30 according to the mass ratio of epoxy resin E-44: epoxy resin E-51: phenolic resin F-51: polyvinylpyrrolidone K30 is mixed according to the ratio of 3: 1 to prepare a resin compound system; p-nitrobenzoic anhydride and tetrachlorophthalic anhydride are mixed according to a mass ratio of 1: 1, mixing to prepare a curing agent; then mixing a resin compound system, cyclohexanone, a coupling agent N-aminoethyl-3-aminopropyl methyl dimethoxysilane, an emulsifier, a filler and a curing agent according to a mass ratio of 30: 47: 5: 8: 5: 5, mixing to prepare the liquid sand control agent. Wherein the emulsifier is styrene-sodium maleate and polyoxyethylene sorbitan monooleate according to the mass ratio of 1: 1; the filler is high-temperature-resistant multi-mineral fine powder and phenolic fiber, the mixture is prepared according to the mass ratio of 4: 1, and the high-temperature-resistant multi-mineral fine powder is a composite oxide containing magnesium oxide, aluminum oxide and silicon oxide. The application temperature of the sand control agent is 100 ℃.
The performance test of the sand control agent is as follows:
(1) curing time test
The liquid sand control agent and the fracturing sand are mixed according to the volume ratio of 10:100, the curing time under the constant temperature conditions of 80 ℃, 90 ℃ and 100 ℃ is respectively measured under the condition of no closed pressure, and the test results are shown in table 1.
(2) Consolidation Strength test
Mixing the liquid sand control agent and the fracturing sand according to the volume ratio of 10:100, respectively measuring the compressive strength of a solidified body formed after the solidified body is solidified at the constant temperature of 80 ℃, 90 ℃ and 100 ℃ for 12 hours under the condition of no closed pressure, wherein the variation range of the compressive strength of the formed solidified body is 35.0-35.4 MPa.
(3) Permeability test
The permeability of the solidification body formed in (2) was measured by a permeability measuring instrument, and the range of the measured value was 115-121 μm2The permeability of the consolidation can meet the process requirements.
(4) Investigation of temperature resistance
The consolidated body obtained in (2) was heat-aged at 200 ℃ for 15 days, and the consolidation strength was measured by a universal tester, as shown in Table 1. It can be seen that the solidification body has good temperature resistance.
Example 2
The preparation method of the sand control agent comprises the following steps:
at normal temperature, mixing epoxy resin E-44, epoxy resin E-51, phenolic resin F-51 and polyvinylpyrrolidone K30 according to the mass ratio of epoxy resin E-44: epoxy resin E-51: phenolic resin F-51: polyvinylpyrrolidone K30 is mixed according to the ratio of 2: 3: 4: 1 to prepare a resin compound system; p-nitrobenzoic anhydride and tetrachlorophthalic anhydride are mixed according to a mass ratio of 1: 1, mixing to prepare a curing agent; then mixing a resin compound system, cyclohexanone, a coupling agent N-aminoethyl-3-aminopropyl methyl dimethoxysilane, an emulsifier, a filler and a curing agent according to a mass ratio of 40: 40: 6: 5: 5: 4 mixing to prepare the liquid sand control agent. Wherein the emulsifier is styrene-sodium maleate and polyoxyethylene sorbitan monooleate according to the mass ratio of 1: 1; the filler is high-temperature-resistant multi-mineral fine powder and phenolic fiber, the mixture is prepared according to the mass ratio of 3: 1, and the high-temperature-resistant multi-mineral fine powder is a composite oxide containing magnesium oxide, aluminum oxide and silicon oxide. The application temperature of the sand control agent is 150 ℃.
The performance test of the sand control agent is as follows:
(1) curing time test
The liquid sand control agent and the fracturing sand are mixed according to the volume ratio of 10:100, the curing time under the constant temperature conditions of 130 ℃, 140 ℃ and 150 ℃ is respectively measured under the condition of no closed pressure, and the test results are shown in table 1.
(2) Consolidation Strength test
Mixing the prepared liquid curing agent and fracturing sand according to the volume ratio of 10:100, and measuring the compressive strength of a solidified body formed after the solidified body is solidified at the constant temperature of 130 ℃, 140 ℃ and 150 ℃ for 12 hours under the condition of no closed pressure. The variation range of the compressive strength of the formed consolidation body is 51.0MPa-54.6 MPa.
(3) Investigation of permeability
Measuring the permeability of the consolidated body formed in (2) with a permeability measuring instrument, wherein the measured value is in the range of 98-102 μm2And the permeability of the consolidation body can meet the process requirement.
(4) Investigation of temperature resistance
The consolidated body formed in (2) was heat-aged at 260 ℃ for 15 days, and the consolidation strength was measured by a universal tester, see Table 1. It can be seen that the solidification body has good temperature resistance.
Example 3
The preparation method of the sand control agent comprises the following steps:
at normal temperature, mixing epoxy resin E-44, epoxy resin E-51, phenolic resin F-51 and polyvinylpyrrolidone K30 according to the mass ratio of epoxy resin E-44: epoxy resin E-51: phenolic resin F-51: mixing polyvinylpyrrolidone K30 (30: 25: 40: 5) to prepare a resin compound system; p-nitrobenzoic anhydride and tetrachlorophthalic anhydride are mixed according to a mass ratio of 1: 1, mixing to prepare a curing agent; then mixing a resin compound system, cyclohexanone, a coupling agent N-aminoethyl-3-aminopropyl methyl dimethoxysilane, an emulsifier, a filler and a curing agent according to a mass ratio of 30: 49: 7: 5: 5: 4 mixing to prepare the liquid sand control agent. Wherein the emulsifier is styrene-sodium maleate and polyoxyethylene sorbitan monooleate according to the mass ratio of 1: 1; the filler is high-temperature-resistant multi-mineral fine powder and phenolic fiber, the mixture is prepared according to the mass ratio of 3: 1, and the high-temperature-resistant multi-mineral fine powder is a composite oxide containing magnesium oxide, aluminum oxide and silicon oxide. The application temperature of the sand control agent is 180 ℃.
The performance test of the sand control agent is as follows:
(1) curing time test
The liquid sand control agent and the fracturing sand are mixed according to the volume ratio of 10:100, the curing time under the constant temperature conditions of 160 ℃, 170 ℃ and 180 ℃ is respectively measured under the condition of no closed pressure, and the test results are shown in table 1.
(2) Consolidation Strength test
Mixing the prepared liquid curing agent and fracturing sand according to the volume ratio of 10:100, and measuring the compressive strength of a solidified body formed after the solidified body is solidified at the constant temperature of 160 ℃, 170 ℃ and 180 ℃ for 12 hours under the condition of no closed pressure. The variation range of the compressive strength of the formed consolidation body is 65.1MPa-65.7 MPa.
(3) Investigation of permeability
Measuring the permeability of the consolidated body formed in (2) with a permeability measuring instrument, wherein the measured value is in the range of 96-98 μm2And the permeability of the consolidation body can meet the process requirement.
(4) Investigation of temperature resistance
The consolidated body formed in (2) was heat-aged at 360 ℃ for 15 days, and the consolidation strength was measured by a universal tester, see Table 1. It can be seen that the solidification body has good temperature resistance.
Table 1 shows the specific data of the performance tests of the consolidated bodies of examples 1-3.
Table 1, sand control agent performance data of examples 1-3
Comparative example 1
The preparation method of the sand control agent comprises the following steps:
at normal temperature, mixing epoxy resin E-44, epoxy resin E-51, phenolic resin F-51 and polyvinylpyrrolidone K30 according to the mass ratio of epoxy resin E-44: epoxy resin E-51: phenolic resin F-51: mixing polyvinylpyrrolidone K30 (30: 25: 40: 5) to prepare a resin compound system; benzoic anhydride is adopted as a curing agent; then mixing a resin compound system, cyclohexanone, a coupling agent N-aminoethyl-3-aminopropyl methyl dimethoxysilane, an emulsifier, a filler and a curing agent according to a mass ratio of 30: 49: 7: 5: 5: 4 mixing to prepare the liquid sand control agent. Wherein the emulsifier is styrene-sodium maleate and polyoxyethylene sorbitan monooleate according to the mass ratio of 1: 1; the filler is high-temperature-resistant multi-mineral fine powder and phenolic fiber, the mixture is prepared according to the mass ratio of 3: 1, and the high-temperature-resistant multi-mineral fine powder is a composite oxide containing magnesium oxide, aluminum oxide and silicon oxide.
Comparative example 2
The preparation method of the sand control agent comprises the following steps:
at normal temperature, mixing epoxy resin E-44, epoxy resin E-51, phenolic resin F-51 and polyvinylpyrrolidone K30 according to the mass ratio of epoxy resin E-44: epoxy resin E-51: phenolic resin F-51: mixing polyvinylpyrrolidone K30 (30: 25: 40: 5) to prepare a resin compound system; p-nitrobenzoic anhydride is adopted as a curing agent; then mixing a resin compound system, cyclohexanone, a coupling agent N-aminoethyl-3-aminopropyl methyl dimethoxysilane, an emulsifier, a filler and a curing agent according to a mass ratio of 30: 49: 7: 5: 5: 4 mixing to prepare the liquid sand control agent. Wherein the emulsifier is styrene-sodium maleate and polyoxyethylene sorbitan monooleate according to the mass ratio of 1: 1; the filler is high-temperature-resistant multi-mineral fine powder and phenolic fiber, the mixture is prepared according to the mass ratio of 3: 1, and the high-temperature-resistant multi-mineral fine powder is a composite oxide containing magnesium oxide, aluminum oxide and silicon oxide.
Comparative example 3
The preparation method of the sand control agent comprises the following steps:
at normal temperature, mixing epoxy resin E-44, epoxy resin E-51, phenolic resin F-51 and polyvinylpyrrolidone K30 according to the mass ratio of epoxy resin E-44: epoxy resin E-51: phenolic resin F-51: mixing polyvinylpyrrolidone K30 (30: 25: 40: 5) to prepare a resin compound system; tetrachlorophthalic anhydride is adopted as a curing agent; then mixing a resin compound system, cyclohexanone, a coupling agent N-aminoethyl-3-aminopropyl methyl dimethoxysilane, an emulsifier, a filler and a curing agent according to a mass ratio of 30: 49: 7: 5: 5: 4 mixing to prepare the liquid sand control agent. Wherein the emulsifier is styrene-sodium maleate and polyoxyethylene sorbitan monooleate according to the mass ratio of 1: 1; the filler is high-temperature-resistant multi-mineral fine powder and phenolic fiber, the mixture is prepared according to the mass ratio of 3: 1, and the high-temperature-resistant multi-mineral fine powder is a composite oxide containing magnesium oxide, aluminum oxide and silicon oxide.
The sand control agents obtained in comparative examples 1, 2 and 3 were subjected to the following performance tests, respectively:
(1) curing time test
The liquid sand control agent and the fracturing sand are mixed according to the volume ratio of 10:100, the curing time under the constant temperature conditions of 160 ℃, 170 ℃ and 180 ℃ is respectively measured under the condition of no closed pressure, and the test results are shown in table 2.
(2) Consolidation Strength test
Mixing the prepared liquid curing agent and fracturing sand according to the volume ratio of 10:100, and measuring the compressive strength of a solidified body formed after the solidified body is solidified at the constant temperature of 160 ℃, 170 ℃ and 180 ℃ for 12 hours under the condition of no closed pressure. The test results are shown in Table 2.
(3) Investigation of permeability
The permeability of the solidification body formed in (2) was measured using a permeability measuring instrument, and the test results are shown in table 2.
(4) Investigation of temperature resistance
The consolidated body formed in (2) was heat-aged at 360 ℃ for 15 days, and the consolidation strength was measured with a universal tester, and the measurement results are shown in Table 2.
TABLE 2 Sand control Performance data for comparative examples 1-3
Comparative examples 1, 2, 3 and example 3, the components of the resulting sand control agent were almost the same, the only difference being the kind of curing agent used. The curing agent of comparative example 1 was benzoic anhydride and contained no nitro groups. The curing agent of comparative example 2 was p-nitrobenzoic anhydride, containing a nitro group. The curing agent of comparative example 3 was tetrachlorophthalic anhydride. The curing agent of the embodiment 3 is p-nitrobenzoic anhydride and tetrachlorophthalic anhydride according to the mass ratio of 1: 1 of a mixture. It can be seen from table 2 that, compared with comparative examples 1 and 2, the solidification time of the sand control agent of comparative example 2 is longer than that of comparative example 1, because the nitro group is contained in the p-nitrobenzoic anhydride, the decomposition temperature of the reactant of the sand control agent is increased, the solidification speed of the sand control agent at high temperature is slowed down, and the solidification time is prolonged. Compared with the comparative examples 1 and 3, the sand control agent has longer curing time when the tetrachlorophthalic anhydride is used as the curing agent, which shows that the curing reaction speed of the tetrachlorophthalic anhydride and the resin is slowed down, the curing time is prolonged, and the high-temperature stability of the epoxy resin is favorably improved. As can be seen by comparing table 1 and table 2, example 3 uses p-nitrobenzoic anhydride and tetrachlorophthalic anhydride in a mass ratio of 1: 1 when the mixture is used as a curing agent, the curing time, the compressive strength, the permeability and the consolidation strength (temperature resistance) of the sand control agent are all obviously superior to those of 3 comparative examples.
In conclusion, the self-polymerization consolidation pressure-resistant permeation-increasing temperature-resistant sand control agent provided by the invention has the characteristics of good temperature resistance, high permeability, high compressive strength and the like, and can be injected into a stratum under the condition of no moving of a pipe column to achieve the purposes of sand control and sand consolidation.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. The self-polymerization consolidation pressure-resistant permeation-resistant temperature-resistant sand control agent is characterized by comprising the following components in percentage by mass:
30-40% of a resin compound system; 40-50% of cyclohexanone; 5-7% of a coupling agent; 5-8% of a filler; 4-5% of curing agent and 5-8% of emulsifier, wherein the sum of the mass percentages of the components is 100%; the curing agent is p-nitrobenzoic anhydride and tetrachlorophthalic anhydride which are mixed by equal mass; the filler is high-temperature-resistant multi-mineral fine powder and phenolic fiber; the high-temperature resistant multi-mineral fine powder is a mixture of magnesium oxide, aluminum oxide and silicon oxide; the resin compound system comprises the following components in percentage by mass: 20-30% of epoxy resin E-44, 20-30% of epoxy resin E-51, 30-40% of phenolic resin F-51 and 5-10% of polyvinylpyrrolidone K30.
2. The self-polymerization consolidation pressure-resistant permeation-increasing temperature-resistant sand control agent according to claim 1, wherein the epoxy resin E-44 is a yellowish to brownish yellow transparent liquid with high viscosity, epoxy equivalent: 210-244 g/Eq; the epoxy resin E-51 is a transparent liquid, and the epoxy equivalent: 184-210 g/Eq; the phenolic resin F-51 is a yellow viscous liquid, and the epoxy equivalent weight: 175-185 g/Eq.
3. The self-polymerization consolidation pressure-resistant permeation-resistant temperature-resistant sand control agent as claimed in claim 1, wherein the coupling agent is N-aminoethyl-3-aminopropylmethyldimethoxysilane.
4. The self-polymerization consolidation pressure-resistant permeation-increasing temperature-resistant sand control agent according to claim 1, wherein the emulsifier is a mixture of styrene-sodium maleate copolymer and polyoxyethylene sorbitan monooleate in a mass ratio of 1: 1.
5. The self-polymerization consolidation pressure-resistant permeability-increasing temperature-resistant sand control agent as claimed in claim 1, wherein the filler is a compound of high-temperature-resistant multi-mineral fine powder and phenolic fiber in a mass ratio of 4: 1-3: 1.
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| CN113684011B (en) * | 2020-05-18 | 2023-03-07 | 长江大学 | High-temperature plugging agent for thermal recovery of thickened oil |
| CN111621284A (en) * | 2020-06-05 | 2020-09-04 | 西南石油大学 | Water-control scale-inhibition coated proppant and preparation method thereof |
| CN115678534B (en) * | 2021-07-29 | 2024-03-19 | 中国石油化工股份有限公司 | Propping agent and preparation method and application thereof |
| CN117264619A (en) * | 2022-06-13 | 2023-12-22 | 中国石油天然气股份有限公司 | Sand-carrying fluid base fluid and application thereof |
| CN115873587B (en) * | 2022-11-17 | 2024-01-23 | 中国石油天然气集团有限公司 | Composite chemical backflow-preventing additive and proppant backflow-preventing method |
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