WO2014171305A1 - 樹脂組成物、注入剤および充填方法 - Google Patents
樹脂組成物、注入剤および充填方法 Download PDFInfo
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- WO2014171305A1 WO2014171305A1 PCT/JP2014/059218 JP2014059218W WO2014171305A1 WO 2014171305 A1 WO2014171305 A1 WO 2014171305A1 JP 2014059218 W JP2014059218 W JP 2014059218W WO 2014171305 A1 WO2014171305 A1 WO 2014171305A1
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- Prior art keywords
- acid
- resin composition
- resin
- curing agent
- weight
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- 238000002347 injection Methods 0.000 claims description 49
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- ACUZDYFTRHEKOS-UHFFFAOYSA-N decan-2-ol Chemical compound CCCCCCCCC(C)O ACUZDYFTRHEKOS-UHFFFAOYSA-N 0.000 description 1
- DTDMYWXTWWFLGJ-UHFFFAOYSA-N decan-4-ol Chemical compound CCCCCCC(O)CCC DTDMYWXTWWFLGJ-UHFFFAOYSA-N 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 125000005265 dialkylamine group Chemical group 0.000 description 1
- 150000004985 diamines Chemical class 0.000 description 1
- DENRZWYUOJLTMF-UHFFFAOYSA-N diethyl sulfate Chemical compound CCOS(=O)(=O)OCC DENRZWYUOJLTMF-UHFFFAOYSA-N 0.000 description 1
- WDNQRCVBPNOTNV-UHFFFAOYSA-N dinonylnaphthylsulfonic acid Chemical compound C1=CC=C2C(S(O)(=O)=O)=C(CCCCCCCCC)C(CCCCCCCCC)=CC2=C1 WDNQRCVBPNOTNV-UHFFFAOYSA-N 0.000 description 1
- LAWOZCWGWDVVSG-UHFFFAOYSA-N dioctylamine Chemical compound CCCCCCCCNCCCCCCCC LAWOZCWGWDVVSG-UHFFFAOYSA-N 0.000 description 1
- YRIUSKIDOIARQF-UHFFFAOYSA-N dodecyl benzenesulfonate Chemical compound CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 YRIUSKIDOIARQF-UHFFFAOYSA-N 0.000 description 1
- JRBPAEWTRLWTQC-UHFFFAOYSA-N dodecylamine Chemical compound CCCCCCCCCCCCN JRBPAEWTRLWTQC-UHFFFAOYSA-N 0.000 description 1
- 229940071161 dodecylbenzenesulfonate Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- CAPAZTWTGPAFQE-UHFFFAOYSA-N ethane-1,2-diol Chemical compound OCCO.OCCO CAPAZTWTGPAFQE-UHFFFAOYSA-N 0.000 description 1
- IIEWJVIFRVWJOD-UHFFFAOYSA-N ethyl cyclohexane Natural products CCC1CCCCC1 IIEWJVIFRVWJOD-UHFFFAOYSA-N 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 230000033444 hydroxylation Effects 0.000 description 1
- 238000005805 hydroxylation reaction Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- JJWLVOIRVHMVIS-UHFFFAOYSA-N isopropylamine Chemical compound CC(C)N JJWLVOIRVHMVIS-UHFFFAOYSA-N 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 229940098779 methanesulfonic acid Drugs 0.000 description 1
- DNIAPMSPPWPWGF-UHFFFAOYSA-N monopropylene glycol Natural products CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 1
- QQZOPKMRPOGIEB-UHFFFAOYSA-N n-butyl methyl ketone Natural products CCCCC(C)=O QQZOPKMRPOGIEB-UHFFFAOYSA-N 0.000 description 1
- GMTCPFCMAHMEMT-UHFFFAOYSA-N n-decyldecan-1-amine Chemical compound CCCCCCCCCCNCCCCCCCCCC GMTCPFCMAHMEMT-UHFFFAOYSA-N 0.000 description 1
- QHCCDDQKNUYGNC-UHFFFAOYSA-N n-ethylbutan-1-amine Chemical compound CCCCNCC QHCCDDQKNUYGNC-UHFFFAOYSA-N 0.000 description 1
- NJWMENBYMFZACG-UHFFFAOYSA-N n-heptylheptan-1-amine Chemical compound CCCCCCCNCCCCCCC NJWMENBYMFZACG-UHFFFAOYSA-N 0.000 description 1
- PXSXRABJBXYMFT-UHFFFAOYSA-N n-hexylhexan-1-amine Chemical compound CCCCCCNCCCCCC PXSXRABJBXYMFT-UHFFFAOYSA-N 0.000 description 1
- MFHKEJIIHDNPQE-UHFFFAOYSA-N n-nonylnonan-1-amine Chemical compound CCCCCCCCCNCCCCCCCCC MFHKEJIIHDNPQE-UHFFFAOYSA-N 0.000 description 1
- JACMPVXHEARCBO-UHFFFAOYSA-N n-pentylpentan-1-amine Chemical compound CCCCCNCCCCC JACMPVXHEARCBO-UHFFFAOYSA-N 0.000 description 1
- NXPPAOGUKPJVDI-UHFFFAOYSA-N naphthalene-1,2-diol Chemical compound C1=CC=CC2=C(O)C(O)=CC=C21 NXPPAOGUKPJVDI-UHFFFAOYSA-N 0.000 description 1
- KPSSIOMAKSHJJG-UHFFFAOYSA-N neopentyl alcohol Chemical compound CC(C)(C)CO KPSSIOMAKSHJJG-UHFFFAOYSA-N 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- FJDUDHYHRVPMJZ-UHFFFAOYSA-N nonan-1-amine Chemical compound CCCCCCCCCN FJDUDHYHRVPMJZ-UHFFFAOYSA-N 0.000 description 1
- 239000010680 novolac-type phenolic resin Substances 0.000 description 1
- 239000010466 nut oil Substances 0.000 description 1
- IOQPZZOEVPZRBK-UHFFFAOYSA-N octan-1-amine Chemical compound CCCCCCCCN IOQPZZOEVPZRBK-UHFFFAOYSA-N 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 235000019198 oils Nutrition 0.000 description 1
- AHHWIHXENZJRFG-UHFFFAOYSA-N oxetane Chemical compound C1COC1 AHHWIHXENZJRFG-UHFFFAOYSA-N 0.000 description 1
- QBDSZLJBMIMQRS-UHFFFAOYSA-N p-Cumylphenol Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=CC=C1 QBDSZLJBMIMQRS-UHFFFAOYSA-N 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 229960001553 phloroglucinol Drugs 0.000 description 1
- QCDYQQDYXPDABM-UHFFFAOYSA-N phloroglucinol Chemical compound OC1=CC(O)=CC(O)=C1 QCDYQQDYXPDABM-UHFFFAOYSA-N 0.000 description 1
- OXNIZHLAWKMVMX-UHFFFAOYSA-N picric acid Chemical compound OC1=C([N+]([O-])=O)C=C([N+]([O-])=O)C=C1[N+]([O-])=O OXNIZHLAWKMVMX-UHFFFAOYSA-N 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920000166 polytrimethylene carbonate Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 150000003138 primary alcohols Chemical class 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- DTOFWENHXCPOJZ-UHFFFAOYSA-N propyl phenylmethanesulfonate Chemical compound CCCOS(=O)(=O)CC1=CC=CC=C1 DTOFWENHXCPOJZ-UHFFFAOYSA-N 0.000 description 1
- 235000013772 propylene glycol Nutrition 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 229940079877 pyrogallol Drugs 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 description 1
- 229960001755 resorcinol Drugs 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 150000003333 secondary alcohols Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229940124530 sulfonamide Drugs 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 150000003509 tertiary alcohols Chemical class 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- IMFACGCPASFAPR-UHFFFAOYSA-N tributylamine Chemical compound CCCCN(CCCC)CCCC IMFACGCPASFAPR-UHFFFAOYSA-N 0.000 description 1
- ABVVEAHYODGCLZ-UHFFFAOYSA-N tridecan-1-amine Chemical compound CCCCCCCCCCCCCN ABVVEAHYODGCLZ-UHFFFAOYSA-N 0.000 description 1
- 229950002929 trinitrophenol Drugs 0.000 description 1
- YFTHZRPMJXBUME-UHFFFAOYSA-N tripropylamine Chemical compound CCCN(CCC)CCC YFTHZRPMJXBUME-UHFFFAOYSA-N 0.000 description 1
- QFKMMXYLAPZKIB-UHFFFAOYSA-N undecan-1-amine Chemical compound CCCCCCCCCCCN QFKMMXYLAPZKIB-UHFFFAOYSA-N 0.000 description 1
- KJIOQYGWTQBHNH-UHFFFAOYSA-N undecanol Chemical compound CCCCCCCCCCCO KJIOQYGWTQBHNH-UHFFFAOYSA-N 0.000 description 1
- 235000020234 walnut Nutrition 0.000 description 1
- 150000003739 xylenols Chemical class 0.000 description 1
- 239000004246 zinc acetate Substances 0.000 description 1
Images
Classifications
-
- 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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/80—Compositions for reinforcing fractures, e.g. compositions of proppants used to keep the fractures open
- C09K8/805—Coated proppants
-
- 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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/66—Compositions based on water or polar solvents
- C09K8/68—Compositions based on water or polar solvents containing organic compounds
-
- 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
- C08G16/00—Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00
- C08G16/02—Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00 of aldehydes
- C08G16/025—Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00 of aldehydes with heterocyclic organic compounds
- C08G16/0256—Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00 of aldehydes with heterocyclic organic compounds containing oxygen in the ring
- C08G16/0262—Furfuryl alcohol
-
- 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
- C08G8/00—Condensation polymers of aldehydes or ketones with phenols only
- C08G8/04—Condensation polymers of aldehydes or ketones with phenols only of aldehydes
- C08G8/08—Condensation polymers of aldehydes or ketones with phenols only of aldehydes of formaldehyde, e.g. of formaldehyde formed in situ
- C08G8/10—Condensation polymers of aldehydes or ketones with phenols only of aldehydes of formaldehyde, e.g. of formaldehyde formed in situ with phenol
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
- C08L61/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
Definitions
- the present invention relates to a resin composition, an injection agent, and a filling method.
- hydraulic crushing is performed.
- viscous fluid is injected into the underground layer through the excavation hole at a sufficient speed and pressure to form a crack in the underground layer.
- an injection containing the particles is injected into the underground layer, and the formed cracks are filled with the particles to prevent clogging of the cracks.
- Such particles include coated particles in which core particles such as silica sand and glass beads are coated with a thermosetting resin such as an epoxy resin or a phenol resin.
- a thermosetting resin such as an epoxy resin or a phenol resin.
- an injection agent in which particles, an epoxy resin, and an acid curing agent are added has been proposed (for example, see Patent Document 1).
- This injectant fills the cracks formed in the underground layer with particles, epoxy resin, and amine curing agent, and then cures the epoxy resin by the action of amine curing agent using underground thermal energy It is intended to coat the particles with the cured product and fix them in the cracks.
- the epoxy resin and the acid curing agent are always in contact. For this reason, there exists a possibility that it may harden
- Patent Document 2 shows the following in order to fix the bottom of the excavation hole in the underground layer with silica particles.
- a resin composition containing a furan resin and a block acid that functions as an acid curing agent the block compound is desorbed from the block acid (acid curing agent) at the bottom of the excavation hole. It has been proposed to bind silica particles by curing the furan resin by the action of the detached acid curing agent, thereby fixing the bottom of the excavation hole.
- An object of the present invention is to provide a resin composition capable of reliably curing an acid curable resin at a target location, an injection containing the resin composition and particles, and cracks formed in the ground.
- the object is to provide a filling method for filling.
- the acid curing agent is present in a state where an acidic group included in the acid curing agent is blocked by a compound having reactivity with the acidic group,
- a resin composition characterized in that the acid curable resin is set to start curing at a temperature of 50 ° C. to 110 ° C. within a period of 2 hours to 8 hours.
- the acid curing agent is selected from the group consisting of p-toluenesulfonic acid, benzenesulfonic acid, dodecylbenzenesulfonic acid, phenolsulfonic acid, naphthalenesulfonic acid, dinonylnaphthalenesulfonic acid and dinonylnaphthalenedisulfonic acid.
- the content of the acid curing agent is any one of the above (1) to (11), which is 0.25 parts by weight or more and 20 parts by weight or less with respect to 100 parts by weight of the acid curable resin.
- the paratoluenesulfonic acid is present in a state in which a sulfonic acid group included in the paratoluenesulfonic acid is blocked with a monovalent alkyl alcohol having 1 to 6 carbon atoms as a compound having reactivity with the sulfonic acid group.
- An injecting agent comprising: a fluid for transferring the particles and the resin composition to the crack.
- the injecting agent according to (15), wherein the average particle diameter of the particles is 100 to 3,000 ⁇ m.
- the injection according to any one of (15) to (18) is transferred to a crack formed in the underground layer through a drilling hole that reaches the underground layer, and the injection is A filling method of filling the cracks with the particles by injecting into the cracks, Due to the pressure and / or underground temperature at which the injecting agent is injected into the crack, the compound is released from the acid curing agent to cause the acid curing agent to react with the acid curable resin.
- the filling method wherein the acid curable resin is cured by the action of the acid curing agent, and at least a part of the outer surface of the particle is covered with the cured product.
- the acid group included in the acid curing agent out of the acid curing agent and the acid curable resin is present in a state of being blocked by a compound having reactivity with the acid group, and
- the compound is designed so that the acid curable resin is cured at a temperature not lower than 50 ° C. and not higher than 110 ° C. within a time period not shorter than 2 hours and not longer than 8 hours. Curing of the curable resin can be prevented.
- FIG. 1 is a view showing an embodiment of the infusate of the present invention.
- FIG. 2 is a partial cross-sectional view showing coated particles in which the particles are coated with a cured product of an acid curable resin.
- FIG. 3 is a partial cross-sectional view showing a state in which pressure is applied to the coated particles shown in FIG.
- FIG. 4 is a conceptual diagram for explaining a method of recovering hydrocarbons from the underground layer.
- FIG. 5 is a graph showing the relationship between the degree of curing of the resin compositions of Examples and Comparative Example 2B and the curing time.
- FIG. 6 is a graph showing the relationship between the degree of curing of the resin composition of each example and the curing time.
- FIG. 7 is a graph showing the relationship between the degree of curing of the resin compositions of each Example and each Comparative Example and the curing time.
- FIG. 8 is a graph showing the relationship between the degree of curing of the resin composition of each example and the curing time.
- FIG. 9 is a graph showing the relationship between the degree of curing of the resin composition of each example and the curing time.
- FIG. 10 is a graph showing the relationship between the degree of curing of the resin composition of each example and the curing time.
- FIG. 11 is a graph showing the relationship between the degree of curing of the resin composition of each example and the curing time.
- FIG. 12 is a graph showing the relationship between the degree of curing of the resin composition of each example and the curing time.
- FIG. 13 is a graph showing the relationship between the degree of curing of the resin composition of each example and the curing time.
- FIG. 14 is a graph showing the relationship between the degree of curing of the resin composition of each example and the curing time.
- FIG. 15 is a graph showing the relationship between the degree of curing of the resin composition of each example and the curing time.
- FIG. 16 is a graph showing the compressive strength of the cured products obtained from the injections of the examples and comparative examples.
- FIG. 17 is a graph showing the compressive strength of the cured products obtained from the injections of Examples and Comparative Example 1P.
- FIG. 1 is a view showing an embodiment of the injectable of the present invention
- FIG. 2 is a partial cross-sectional view showing coated particles in which the particles are coated with a cured product of an acid curable resin
- FIG. It is a fragmentary sectional view which shows the state in which the pressure was provided to the coating particle to show.
- the injection agent of the present invention is injected into a crack formed in the underground layer when oily or gaseous hydrocarbon (fluid) is recovered from the underground layer (shale layer).
- the injection 100 includes particles 2 filled in cracks, an acid curing agent A in which acidic groups are blocked, and an acid curing property that is cured by the action of the acid curing agent A.
- Resin B and particle 2, acid curing agent A, and fluid 20 for transferring acid curable resin B to the crack are included.
- the resin composition of this invention is comprised by the acid hardening agent A in which the acidic group was blocked, and the acid curable resin B.
- the particles 2 are covered with a surface layer 3 formed of a cured product of the acid curable resin B and are present as coated particles 1 as shown in FIG. 2 in a state of being filled in cracks formed in the underground layer.
- the covered particles 1 are filled in cracks formed in the underground layer, and the cracks are prevented from being blocked, and the fluid permeability of the filling site (underground layer cracks) of the covered particles 1 in the underground layer is ensured. . Thereby, the inflow efficiency of hydrocarbons into the excavation hole communicating with the crack can be increased.
- Particle 2 functions as a support material in the crack.
- Various particles having a relatively high mechanical strength can be used for the particles 2 and are not limited to a specific type.
- Specific examples of the particles 2 include sand particles, ceramic particles, silica particles, metal particles, and walnut shells.
- the plurality of particles 2 include at least one of sand particles and ceramic particles.
- Sand particles and ceramic particles have high mechanical strength, and are relatively inexpensive and readily available.
- the average particle diameter of the plurality of particles 2 is preferably about 100 to 3,000 ⁇ m, and more preferably about 200 to 1,000 ⁇ m. By using the particle 2 having such a size, the fluid permeability of the crack filled with the coated particle 1 can be sufficiently ensured.
- the plurality of particles 2 may include particles having a variation in particle diameter and different in particle diameter by about 10 times. That is, when the particle size distribution of the plurality of particles 2 is measured, the half width of the peak of the particle size distribution curve represented by the angle function may be a relatively large value.
- the cross-sectional shape of the particle 2 is shown as a substantially circular shape, but may be an elliptical shape, a polygonal shape, an irregular shape, or the like. In these cases, the particle size of the particles 2 is defined as the maximum length in the cross section.
- the cross-sectional shape is preferably as close to a circular shape as possible.
- Such ceramic particles have a particularly high mechanical strength. Further, by using such ceramic particles, the coated particles 1 come into point contact with each other in a state filled with cracks. For this reason, the volume of the space (flow path) formed between them can be increased.
- the particles 2 naturally produced sand particles can be used as they are. By using such sand particles, the productivity of the injection 100 can be improved and the cost can be reduced. Furthermore, a mixture of ceramic particles and sand particles may be used as the particles 2. In this case, the mixing ratio of the ceramic particles and the sand particles is preferably about 1: 9 to 9: 1 by weight, more preferably about 3: 7 to 7: 3.
- the surface layer 3 functions to prevent the fragments of the particles 2 from being dissipated even when the particles 2 filled in the cracks in the underground layer are temporarily collapsed by underground pressure. For this reason, it is possible to prevent the space (flow path) between the coated particles 1 from being blocked by the particles 2. Thereby, the fluid permeability of the crack with which the covering particle
- the content of the particles 2 in the entire injectant 100 is preferably about 5 to 50% by weight, and more preferably about 5 to 15% by weight. In the case of an injection containing such an amount of particles 2, the particles 2 can be stably dispersed regardless of the viscosity of the fluid.
- the surface layer 3 preferably covers the entire outer surface of the particle 2 when filled with cracks formed in the underground layer, but a part of the outer surface of the particle 2. Only may be covered. That is, the plurality of particles 2 may be covered with the crack formed in the underground layer, and all of them may be covered with the surface layer 3 over the entire outer surface, or a part of the outer surface. Only the surface layer 3 may be covered. Further, in the above state, some of the particles 2 may be covered with the surface layer 3 over the entire outer surface, and the remaining particles 2 may be covered with the surface layer 3 over only part of the outer surface.
- the surface layer 3 is composed of a cured product formed by curing the acid curable resin B contained in the resin composition by the action of the acid curing agent A.
- the injection agent 100 includes, as the resin composition of the present invention, an acid curing agent A and an acid curable resin B that is cured in the presence of an acid, that is, an acid curable resin B that is cured by the action of the acid curing agent A. It is out.
- an acidic group provided in the acid curing agent A having reactivity with the acid curable resin B is a compound having reactivity with this acidic group (hereinafter referred to as “acidic group”).
- This compound is sometimes referred to as a “block compound”). Further, the block compound is designed so that the release from the acid curing agent A is initiated within 2 hours to 8 hours at a temperature of 50 to 110 ° C. Has been.
- the acid curing agent A and the acid curable resin B are brought into contact (reacted) at an unnecessary place by blocking the acid group included in the acid curing agent A with the block compound, and the acid curable resin. B can be prevented from curing, and further, the block compound is detached from the acid curing agent A at a necessary place (that is, a crack formed in the underground layer).
- the acid curable resin B can be cured by contact (reaction) with the curable resin B.
- the acid curing agent A has an inactive function (reactivity) for curing the acid curable resin B due to being blocked with a blocking compound in an unnecessary portion, and the necessary portion. Then, the acid curable resin B can be hardened by the release of the block compound.
- the release of the block compound from the acid curing agent A is such that the curing of the acid curable resin B is initiated at a temperature of 50 ° C. to 110 ° C. within a period of 2 hours to 8 hours.
- the acid curing agent A can selectively cure the acid curable resin B at a necessary location without curing the acid curable resin B at an unnecessary location. it can.
- blocking is a reaction in which a functional group of a block compound is chemically bonded to an acidic group provided in the acid curing agent A, and the curing of the acid curable resin B proceeds by the acidic group.
- Unblocking means that the functional group of the block compound is detached from the acidic group of the acid curing agent A, and the reactivity with which the curing of the acid curable resin B proceeds is activated by the acidic group. Say that you are in a state.
- the acid curable resin B is preferably cured at a temperature of 110 ° C. or less by the action of an acid curing agent (an unblocked product of the acid curing agent A) that is not blocked, and is cured at a temperature of 75 ° C. or less. Is more preferable, and it is further preferable to cure at a temperature of 25 ° C. (room temperature) or less. That is, after the block compound is released, the acid curable resin B is preferably one that begins to cure at a temperature of 110 ° C. or less due to the action of the block compound, and begins to cure at a temperature of 75 ° C. or less. It is more preferable that curing begins at a temperature of 25 ° C. (room temperature) or less.
- the injecting agent (resin composition) 100 can be particularly suitably used when recovering hydrocarbons from an underground layer located at a relatively shallow location.
- the resin composition (injection 100) of the present invention has an acid curing agent A and an acid curing property. Since the acid group of the acid curing agent A included in the resin B is in a state blocked by the block compound, the acid curing resin B is cured before the block compound is released from the acid curing agent A. It can be accurately prevented.
- the acid curable resin B examples include furan resins, phenol resins, melamine resins, urea resins, oxetane resins, and the like, and these can be used alone or in combination.
- the acid curable resin B includes at least one selected from the group consisting of a furan resin and a phenol resin. Since these acid curable resins are easily cured at a temperature of about room temperature in the presence of an acid such as the acid curing agent A (acidic group included in the acid curing agent A), it is particularly useful in the present invention. Suitable for. Further, by using these resins, particularly high mechanical strength can be imparted to the surface layer 3.
- the furan resin examples include a furfural resin, a furfural phenol resin, a furfural ketone resin, a furfuryl alcohol resin, a furfuryl alcohol phenol resin, and the like, and one or more of these can be used in combination.
- the furfural resin includes one or a mixture of furfural monomers, oligomers and homopolymers
- the furfural phenol resin includes a mixture of a furfural resin and a phenol resin, and a furfuryl alcohol resin.
- the furfuryl alcohol phenol resin a mixture of a furfuryl alcohol resin and a phenol resin can be mentioned.
- the furan resin is preferably a mixture of a furfural resin and a furfuryl alcohol resin, and more specifically, a furfural and furfuryl alcohol copolymer, a furfural monomer, and a furfuryl alcohol monomer. It is more preferable that it is a mixture. By using such a mixture, the effect of using a furan resin as the acid curable resin B can be more remarkably exhibited.
- the weight average molecular weight is not particularly limited, but is preferably 500 or more and 500,000 or less, and more preferably 10,000 or more and 30,000 or less. .
- the injection 100 is formed in the underground layer while preventing the precipitation of the furan resin (acid curable resin B) in the injection 100 (resin composition).
- the curing of the furan resin can be started in a state where the furan resin is adhered (entangled) to the particles 2. Therefore, in the crack, the particle 2 can be covered with the surface layer 3 to reliably generate the coated particle 1.
- a typical method for producing a furfuryl alcohol / furfural copolymer is obtained by adding an acid to a mixture of furfuryl alcohol and furfural and then reacting them by heating. After the reaction, neutralization with an alkali suppresses the progress of the reaction and can be stored at an appropriate viscosity.
- the reactivity of the resin can be changed depending on the neutralization conditions. When the pH is low, the reactivity is high, and when the pH is high, the reactivity is low. It can also be obtained by adding an acid to furfuryl alcohol, heating and reacting, then adding furfural, heating again and reacting.
- the acid is not particularly limited as long as the pH in the reaction system can be 3 or less, and examples thereof include hydrochloric acid, sulfuric acid, p-toluenesulfonic acid, and the like. Can be used in combination. Copolymers with aldehydes other than furfural may also be used, such as formaldehyde, paraformaldehyde, trioxane, acetaldehyde, propionaldehyde, polyoxymethylene, chloral, hexamethylenetetramine, furfural, glyoxal, n-butyraldehyde, caproaldehyde.
- a copolymer of furfuryl alcohol and aldehyde obtained by using allylaldehyde, benzaldehyde, crotonaldehyde, acrolein, tetraoxymethylene, phenylacetaldehyde, o-tolualdehyde, salicylaldehyde, paraxylene dimethyl ether and the like may be used.
- phenolic resin examples include resol type phenolic resin, alkylene etherified resol type phenolic resin, dimethylene ether type phenolic resin, aminomethyl type phenolic resin, novolac type phenolic resin, aralkyl type phenolic resin, dicyclopentadiene type phenolic resin and the like. It is done. Among these, a resol type phenol resin is preferably used.
- a resol-type phenol resin is obtained by mixing phenols and aldehydes, adding a base, heating and reacting under basic conditions. After the reaction, neutralization with an acid can suppress thickening of the resin alone.
- phenols include cresols such as phenol, o-cresol, m-cresol, and p-cresol, 2,3-xylenol, 2,4-xylenol, 2,5-xylenol, 2,6-xylenol, 3, Xylenol such as 4-xylenol and 3,5-xylenol, ethylphenol such as o-ethylphenol, m-ethylphenol and p-ethylphenol, butylphenol such as isopropylphenol, butylphenol and p-tert-butylphenol, p-tert- Alkylphenols such as amylphenol, p-octylphenol, p-nonylphenol, p-cumylphenol, p-phenylphenol, aminophenol, nitrophenol, dinitrophenol, trinitrophenol, cardano Monovalent phenol substitution products such as 1-naphthol, 2-nap-
- Halogenated phenols such as fluorophenol, chlorophenol, bromophenol, and iodophenol can also be used, but it is preferable to use phenols that do not contain halogen from the viewpoint of the environment. These can be used alone or in combination of two or more.
- aldehydes examples include formaldehyde, paraformaldehyde, trioxane, acetaldehyde, propionaldehyde, polyoxymethylene, chloral, hexamethylenetetramine, furfural, glyoxal, n-butyraldehyde, caproaldehyde, allylaldehyde, benzaldehyde, crotonaldehyde, acrolein, Examples include tetraoxymethylene, phenylacetaldehyde, o-tolualdehyde, salicylaldehyde, paraxylene dimethyl ether, and the like. These can be used alone or in combination of two or more.
- Bases include hydroxides of alkali metals such as sodium hydroxide, lithium hydroxide and potassium hydroxide, tertiary amines such as ammonia water and triethylamine, oxides of alkaline earth metals such as calcium, magnesium and barium and hydroxylation. Products, alkaline substances such as sodium carbonate, hexamethylenetetramine and the like, and these can be used alone or in combination of two or more.
- the acid include acids such as sulfuric acid, succinic acid, hydrochloric acid, diethyl sulfuric acid, and paratoluenesulfonic acid, and metal salts such as zinc acetate, and these can be used alone or in combination of two or more.
- the acid curing agent A functions as a catalyst for promoting the curing reaction of the acid curable resin B when the blocking by the block compound is released.
- any acid curing agent may be used as long as it has an acidic group and can function as the catalyst by the action of the acidic group.
- p-toluenesulfonic acid benzene
- a sulfonic acid group as an acidic group such as sulfonic acid, dodecylbenzenesulfonic acid, phenolsulfonic acid, naphthalenesulfonic acid, dinonylnaphthalenesulfonic acid, dinonylnaphthalenedisulfonic acid, xylenesulfonic acid and methanesulfonic acid
- acetic acid Those having a carboxyl group as an acidic group such as lactic acid, maleic acid, benzoic acid, and fluoroacetic acid can be used, and one or more of these can be used in combination.
- the acid curing agent A preferably contains a sulfonic acid group as an acidic group.
- the acid curing agent A having a sulfonic acid group as such an acidic group is a very good catalyst for the acid curable resin B, and can reliably block the acidic group with a blocking compound.
- the acid curing agents A containing sulfonic acid groups as acidic groups p-toluenesulfonic acid, benzenesulfonic acid, dodecylbenzenesulfonic acid, phenolsulfonic acid and naphthalenesulfonic acid, dinonylnaphthalenesulfonic acid, dinonylnaphthalenedisulfone It is preferable to include at least one selected from the group consisting of acids, particularly p-toluenesulfonic acid. By using these acid curing agents A, particularly p-toluenesulfonic acid, it is possible to more reliably block acidic groups with a blocking compound.
- the content of the acid curing agent A is preferably about 0.25 to 20 parts by weight, more preferably about 0.5 to 15 parts by weight, based on 100 parts by weight of the acid curing agent resin B. More preferably, it is about 0.5 to 10 parts by weight.
- the compound (block compound) which has reactivity with respect to the acidic group included in the acid curing agent A blocks the acidic group included in the acid curing agent A, so that the acid curing agent A and the acid curable resin B
- it has a function of preventing the acid curable resin B from being cured by reacting at an unnecessary place, and at the necessary place, it is separated from the acid hardener A, so that the acid hardener A and the acid curable resin are cured. It has a function of curing the acid curable resin B by reacting with the resin B.
- the block compound starts the detachment of the block compound from the acid curing agent A, and the curing of the acid curable resin B is started at a temperature of 50 ° C. to 110 ° C. within a period of 2 hours to 8 hours.
- the acid curable resin B is selectively cured at a necessary place without curing the acid curable resin B at a place where the acid curing agent A is unnecessary. Demonstrate the function.
- a liquid in a neutral region can be used as the fluid 20 of the injecting agent 100, and the load on the environment can be reduced. Furthermore, when filling the injection 100 into the crack, there is also an advantage that the pipeline through which the injection 100 passes can be reliably prevented from being acid-corroded.
- Such a block compound is provided with a functional group, and this functional group chemically bonds to an acidic group included in the acid curing agent A, thereby blocking the acid curing agent.
- the functional group any functional group may be used as long as it can react with an acidic group to link (chemically bond) the block compound to the acid curing agent A, and examples thereof include a hydroxyl group and an amino group. These can be used alone or in combination of two or more. Since the block compound having such a functional group has excellent reactivity with respect to the acidic group of the acid curing agent A, the functional group and the acidic group are reacted (chemically bonded) to form a block compound. The acid curing agent A can be surely blocked.
- Examples of the block compound having a hydroxyl group as a functional group include alkyl alcohols such as monohydric alkyl alcohols and polyhydric alkyl alcohols, alkenyl alcohols, aromatic alcohols and heterocycle-containing alcohols. Preferably there is. As a result, the acid curing agent A can be more reliably blocked with the block compound. Further, the monovalent alkyl alcohol may be any one having a linear, branched or cyclic alkyl group.
- examples of the linear or branched monohydric alkyl alcohol include propanol such as methanol, ethanol, 1-propanol and 2-propanol, 1-butanol, 2-butanol, 2-methyl- 1-propanol, butanol such as 2-methyl-2-propanol, 1-pentanol, 2-pentanol, 3-pentanol, 2-methyl-1-butanol, 3-methyl-1-butanol, 2-methyl -2-butanol, pentanol such as 2,2-dimethyl-1-propanol, 1-hexanol, 2-hexanol, 3-hexanol, 2-methyl-1-pentanol, 2-methyl-2-pentanol, 2-methyl-3-pentanol, 3-methyl-1-pentanol, 3-methyl-2-pentanol, 3- Til-3-pentanol, 4-methyl-1-pentanol, 4-methyl-1-pentanol, 4-methyl-1-pentan
- cyclic monohydric alkyl alcohol examples include, for example, cyclopentanol, cycloheptanol, methylcyclopentanol cyclopentylmethanol, cyclohexylmethanol, 1-cyclohexylethanol, 2-cyclohexylethanol, and 3-cyclohexyl.
- examples of the polyhydric alkyl alcohol include divalent alcohols such as ethylene glycol (1,2-ethanediol), 1,2-propanediol, and 1,3-propanediol, trivalent alcohols such as glycerin, Examples include tetravalent alcohols such as pentaerythritol, and one or more of these can be used in combination.
- a sulfonic acid ester bond is formed between the acid curing agent A and the block compound having a functional group as a hydroxyl group. Is blocked with a blocking compound. That is, a sulfonic acid ester is formed as the acid curing agent A blocked with the block compound.
- Examples of the block compound having a hydroxyl group as a functional group include alkylamines such as monovalent alkylamines and polyvalent alkylamines, alkenylamines, aromatic amines, and heterocyclic-containing amines. Among these, Alkylamine is preferred. As a result, the acid curing agent A can be more reliably blocked with the block compound.
- Examples of the monovalent alkylamine include hexylamine, heptylamine, octylamine, nonylamine, decylamine, undecylamine, dodecylamine, tridecylamine, tetradecylamine, pentadecylamine, hexadecylamine, octadecylamine, Monoalkylamines such as isopropylamine, isoamylamine, 3,3-dimethylbutylamine; N-ethylbutylamine, dibutylamine, dipentylamine, dihexylamine, diheptylamine, dioctylamine, dinonylamine, didecylamine, N-methylcyclohexylamine, Dialkylamines such as dicyclohexylamine; trimethylamine, triethylamine, tripropylamine, tributylamine, trioctylamine Trialkyl
- polyvalent alkylamine examples include diamines such as ethylenediamine, hexamethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, and pentaethyleneexamine, and triamines such as bis (hexamethylene) triamine. One or more of these can be used in combination.
- an acid curing agent A having an acidic group as a sulfonic acid group When an acid curing agent A having an acidic group as a sulfonic acid group is used, a salt is formed between the functional group and the block compound having an amino group by neutralization (ionic bond).
- the acid curing agent A is blocked with a block compound. That is, a sulfonic acid amine salt is formed as the acid curing agent A blocked with the block compound.
- the acid curable resin B is at a temperature of 50 ° C. or higher and 110 ° C. or lower by adjusting the type and content thereof.
- the curing is set to start within a period of 2 hours or more and 8 hours or less. That is, by appropriately selecting and setting these types and contents, the curing start temperature and the curing start time of the acid curable resin B are in the range of 50 ° C. or more and 110 ° C. or less and 2 hours or more and 8 hours or less, respectively. Is set to
- the curing start temperature and the curing start time can be set within the following ranges, respectively.
- the curing start temperature And the curing start time can be set within the range of 50 ° C. or more and 70 ° C. or less and 2 hours or more and 4 hours or less, respectively, and the content of the blocked acid curing agent A with respect to the acid curable resin B is 2
- the curing start temperature and the curing start time can be set within the range of 50 ° C. or more and 70 ° C. or less and 4 hours or more and 6 hours or less, respectively.
- the curing start temperature and the curing start time are respectively set. It can be set within the range of 50 ° C. or higher 70 ° C. or less and 6 hours than 8 hours. Further, by selecting ethanol as the block compound and setting the content of the blocked acid curing agent A (ethyl paratoluenesulfonate) with respect to the acid curable resin B to 5 to 10 parts by weight, the curing start temperature And the curing start time can be set in the ranges of 50 ° C. or more and 70 ° C. or less and 6 hours or more and 8 hours or less, respectively.
- the curing start temperature and the curing start time can be set within the range of 70 ° C. or more and 90 ° C. or less and 2 hours or more and 4 hours or less, respectively, and the acid curing agent B of the blocked acid curing agent A is By setting the content to 0.25 to 0.5 parts by weight, the curing start temperature and the curing start time are set within the ranges of 70 ° C. or higher and 90 ° C. or lower and 4 hours or longer and 6 hours or shorter, respectively. Can do.
- the content of the blocked acid curing agent A (ethyl toluene or propyl paratoluenesulfonate) with respect to the acid curable resin B is set to 1.5 to 5 parts by weight.
- the curing start temperature and the curing start time can be set within the ranges of 70 ° C. or more and 90 ° C. or less and 2 hours or more and 4 hours or less, respectively, and the acid curing of the blocked acid curing agent A is performed.
- the curing start temperature and the curing start time are set in the range of 70 ° C. or more and 90 ° C.
- the curing start temperature By setting the content of the blocked acid curing agent A with respect to the acid curable resin B to 0.5 to 1 part by weight, the curing start temperature
- the preliminary curing initiation time can be set in the range of 70 ° C. or higher 90 ° C. 8 hours or less inclusive, and 6 hours.
- the curing is performed.
- the start temperature and the curing start time can be set within the ranges of 70 ° C. or more and 90 ° C.
- the curing start temperature and the curing start time can be set within the range of 70 ° C. to 90 ° C. and 4 hours to 6 hours, respectively.
- the curing start temperature and the curing start time are respectively set to 7 ° C. can be set to at least 90 ° C. within a range of less and more than 6 hours 8 hours.
- the curing start temperature and the curing start time can be set within the range of 90 ° C. or higher and 110 ° C. or lower and 2 hours or longer and 4 hours or shorter, respectively. Further, by selecting ethanol as the block compound and setting the content of the blocked acid curing agent A (ethyl paratoluenesulfonate) to the acid curable resin B to 0.25 to 1.5 parts by weight, The curing start temperature and the curing start time can be set within the range of 90 ° C. or higher and 110 ° C.
- the curing start temperature and the curing start time can be set within the range of 90 ° C. or higher and 110 ° C. or lower and 2 hours or longer and 4 hours or shorter, respectively, and the blocked acid curing agent By setting the content of A to the acid curable resin B to 0.25 to 0.5 parts by weight, the curing start temperature and the curing start time are 90 ° C. or higher and 110 ° C. or lower and 4 hours or longer and 6 hours, respectively. It can be set within the following range.
- the curing starts The temperature and the curing start time can be set within the range of 50 ° C. or more and 70 ° C. or less and 2 hours or more and 4 hours or less, respectively, and the content of the blocked acid curing agent A with respect to the acid curable resin B is set as follows.
- the curing start temperature and the curing start time can be set within the range of 50 ° C. or more and 70 ° C. or less and 4 hours or more and 6 hours or less, respectively.
- the curing start temperature and the curing start time are set. And each can be set within the range of 50 ° C. or higher 70 ° C. or less and 6 hours than 8 hours. Further, by setting the content of the blocked acid curing agent A with respect to the acid curable resin B to 0.5 to 1.5 parts by weight, the curing start temperature and the curing start time are 70 ° C. or more, respectively. It can be set within the range of 90 ° C. or less and 2 hours or more and 4 hours or less.
- the curing is performed.
- the start temperature and the curing start time can be set in the ranges of 90 ° C. or higher and 110 ° C. or lower and 4 hours or longer and 6 hours or shorter, respectively.
- the acid curable property of the blocked acid curing agent A (dodecylbenzene sulfonate) is selected.
- the curing start temperature and the curing start time are set in the ranges of 50 ° C. or more and 70 ° C. or less and 2 hours or more and 4 hours or less, respectively.
- the curing start temperature and the curing start time are set to 50 respectively.
- the content of the blocked acid curing agent A with respect to the acid curable resin B can be set within the range of not less than 70 ° C and not more than 70 ° C and not less than 4 hours and not more than 6 hours. .25
- the curing initiation temperature and the curing starting time, respectively can be set within the range of 50 ° C. or higher 70 ° C. or less and 6 hours than 8 hours.
- the curing start temperature and the curing start time are 70 ° C. or more, respectively. It can be set within the range of 90 ° C. or less and 2 hours or more and 4 hours or less. Further, by setting the content of the blocked acid curing agent A with respect to the acid curable resin B to 0.25 to 0.5 parts by weight, the curing start temperature and the curing start time are 90 ° C. or more, respectively. It can be set within a range of 110 ° C. or less and 2 hours or more and 4 hours or less.
- the acid curable resin B and the acid curing agent A are selected as the acid curable resin B and the acid curing agent A, respectively.
- the acid of the blocked acid curing agent A (dinonyl naphthalene sulfonate) is selected.
- the curing start temperature and the curing start time are within the range of 50 ° C. to 70 ° C. and 2 hours to 4 hours, respectively.
- the curing start temperature and the curing start time are respectively set to
- the acid curing agent A containing the blocked acid curing agent A can be set within the range of 50 ° C. to 70 ° C. and 4 hours to 6 hours. Is set to 0.5 to 1.5 parts by weight, the curing start temperature and the curing start time can be set in the ranges of 50 ° C. or more and 70 ° C. or less and 6 hours or more and 8 hours or less, respectively. .
- the curing start temperature and the curing start time are 70 ° C. or more, respectively. It can be set within the range of 90 ° C. or less and 2 hours or more and 4 hours or less, and the content of the blocked acid curing agent A with respect to the acid curable resin B is set to 0.5 to 1.5 parts by weight. Thereby, the said hardening start temperature and hardening start time can be set in the range of 70 to 90 degreeC and 4 to 6 hours, respectively.
- the curing start temperature and the curing start time are 90 ° C. or more, respectively. It can be set within a range of 110 ° C. or less and 2 hours or more and 4 hours or less.
- the curing start temperature and the curing start time can be set within the following ranges, respectively. That.
- the curing is performed.
- the start temperature and the curing start time can be set within the ranges of 50 ° C. or more and 70 ° C. or less and 2 hours or more and 4 hours or less, respectively, and the content of the blocked acid curing agent A with respect to the acid curable resin B Is set to 0.5 to 2.5 parts by weight, the curing start temperature and the curing start time can be set within the range of 50 ° C. or more and 70 ° C. or less and 4 hours or more and 6 hours or less, respectively.
- the initial temperature and the curing start time can be set within the range of 50 ° C. or more and 70 ° C. or less and 6 hours or more and 8 hours or less, respectively, and the blocked acid curing agent A with respect to the acid curable resin B
- the curing start temperature and the curing start time are set within the range of 70 ° C. or more and 90 ° C. or less and 2 hours or more and 4 hours or less, respectively. Can do.
- acid curable resin B an acid is added to furfuryl alcohol and heated to react until the viscosity becomes 100 to 500 cPs to obtain a polymer, neutralized with a base, and heated under reduced pressure to remove water, Furanyl alcohol monomer or furfural monomer or a mixture thereof was added to the copolymer at a ratio of 0 to 100 phr with respect to the copolymer, and furan resin c in which the pH of the resulting resin was adjusted to 5 to 8 was used.
- paratoluenesulfonic acid is selected as the curing agent A
- the curing start temperature and the curing start time can be set within the following ranges, respectively.
- the curing is performed.
- the start temperature and the curing start time can be set within the ranges of 70 ° C. or more and 90 ° C. or less and 2 hours or more and 4 hours or less, respectively, and the content of the blocked acid curing agent A with respect to the acid curable resin B Is set to 5 to 1.5 parts by weight, the curing start temperature and the curing start time can be set in the ranges of 70 ° C. or more and 90 ° C. or less and 4 hours or more and 6 hours or less, respectively.
- the copolymer which can be added and heated to react until the viscosity reaches 100 to 500 cPs is neutralized with a base, heated under reduced pressure to remove water, and furfuryl alcohol monomer or furfural monomer or
- p-toluenesulfonic acid is selected as the acid curing agent A using a furan resin d in which the mixture is added at a ratio of 0 to 100 phr with respect to the copolymer and the pH of the resulting resin is adjusted to 5 to 8,
- the curing start temperature and the curing start time can be set within the following ranges, respectively.
- the curing start temperature And the curing start time can be set within the range of 50 ° C. or more and 70 ° C. or less and 2 hours or more and 4 hours or less, respectively, and the acid curability of the blocked acid curing agent A (methyl paratoluenesulfonate)
- the curing start temperature and the curing start time can be set within the ranges of 50 ° C. or more and 70 ° C. or less and 4 hours or more and 6 hours or less, respectively.
- the curing start temperature can be set within the range of 50 ° C. or higher 70 ° C. or less and 6 hours than 8 hours. Further, by setting the content of the blocked acid curing agent A with respect to the acid curable resin B to 1.5 to 5 parts by weight, the curing start temperature and the curing start time are 70 ° C. or more and 90 ° C., respectively. Can be set within the range of 2 hours or less and 4 hours or less, and the content of the blocked acid curing agent A with respect to the acid curable resin B is set to 5 to 10 parts by weight.
- the temperature and the curing start time can be set in the ranges of 70 ° C. or more and 90 ° C. or less and 4 hours or more and 6 hours or less, respectively. Further, by setting the content of the blocked acid curing agent A with respect to the acid curable resin B to 0.5 to 1 part by weight, the curing start temperature and the curing start time are 90 ° C. or more and 100 ° C., respectively. Or within the range of 2 hours or more and 4 hours or less, and by setting the content of the blocked acid curing agent A to the acid curable resin B to 0.25 to 0.5 parts by weight
- the curing start temperature and the curing start time can be set in the ranges of 90 ° C. or higher and 110 ° C. or lower and 4 hours or longer and 6 hours or shorter, respectively.
- the copolymer obtained by heating and reacting until the viscosity reaches 100 to 500 cPs is neutralized with a base, heated under reduced pressure to remove water, and furfuryl alcohol monomer or furfural monomer or the
- the furan resin e in which the pH of the finished resin is adjusted to 5 to 8 and paratoluenesulfonic acid is selected as the acid curing agent A, the above-mentioned curing is added.
- the start temperature and the curing start time can be set within the following ranges, respectively.
- the curing start temperature And the curing start time can be set within the range of 50 ° C. or more and 70 ° C. or less and 2 hours or more and 4 hours or less, respectively, and the acid curability of the blocked acid curing agent A (methyl paratoluenesulfonate)
- the curing start temperature and the curing start time can be set within the ranges of 50 ° C. or more and 70 ° C. or less and 4 hours or more and 6 hours or less, respectively.
- the curing start temperature can be set within the range of 50 ° C. or higher 70 ° C. or less and 6 hours than 8 hours. Further, by setting the content of the blocked acid curing agent A with respect to the acid curable resin B to 1.5 to 5 parts by weight, the curing start temperature and the curing start time are 70 ° C. or more and 90 ° C., respectively. Can be set within the range of 2 hours or less and 4 hours or less, and the content of the blocked acid curing agent A with respect to the acid curable resin B is set to 5 to 10 parts by weight.
- the temperature and the curing start time can be set in the ranges of 70 ° C. or more and 90 ° C. or less and 4 hours or more and 6 hours or less, respectively. Further, by setting the content of the blocked acid curing agent A with respect to the acid curable resin B to 0.5 to 1.5 parts by weight, the curing start temperature and the curing start time are 90 ° C. or more, respectively. It can be set to 110 ° C. or less and within a range of 2 hours to 4 hours, and the content of the blocked acid curing agent A with respect to the acid curable resin B is set to 0.25 to 0.5 parts by weight. Thereby, the said hardening start temperature and hardening start time can be set in the range of 90 degreeC or more and 110 degrees C or less and 4 hours or more and 6 hours or less, respectively.
- the curing start temperature and the curing start time are as follows: Can be set within the range.
- the curing is performed.
- the start temperature and the curing start time can be set within the ranges of 50 ° C. or more and 70 ° C. or less and 2 hours or more and 4 hours or less, respectively, and the content of the blocked acid curing agent A with respect to the acid curable resin B Is set to 1.5 to 2.5 parts by weight, the curing start temperature and the curing start time can be set within the range of 50 ° C. to 70 ° C. and 4 hours to 6 hours, respectively. .
- the curing start temperature and the curing start time are 70 ° C. or more, respectively. It can be set within the range of 90 ° C. or less and 4 hours or more and 6 hours or less.
- the acid curing agent A is made into a blocked acid curing agent A in which the block compound is firmly connected to the acid curing agent A. Therefore, such a block compound is suitably used for delaying the curing start time in a relatively high temperature region.
- a monovalent alkyl alcohol (lower alcohol) having a small carbon number and a block compound are suitably used when the curing start time is relatively shortened in a relatively low temperature region.
- the relationship between primary alcohol and secondary alcohol is the same as the relationship between higher alcohol and lower alcohol.
- the acid curable resin is set to start curing at a temperature of 50 ° C. or higher and 110 ° C. or lower within a period of 2 hours or longer and 8 hours or shorter. It is preferably set to start curing within a time of 2 hours or more and 8 hours or less at a temperature, and curing is started within a time period of 4 hours or more and 6 hours or less at a temperature of 70 ° C. or more and 90 ° C. or less. More preferably, it is set as follows.
- the acid curable resin B is preferably set to complete the curing within 48 hours, and more preferably set to complete the curing within 24 hours. Thereby, since hardening of acid curable resin can be completed more reliably in the target location, the particle
- acid curing resin B, acid curing agent A and block compound are selected from furan resin, p-toluenesulfonic acid and monovalent alkyl alcohol having 1 to 6 carbon atoms, respectively, and blocked acid curing.
- the curing start temperature and the curing start time of the acid curable resin are set to 70 ° C. or more and 90 ° C. or less and Since it can be set within a range of 4 hours or more and 6 hours or less, it can be said to be a preferable combination of the types and contents of the acid curable resin B, the acid curing agent A and the block compound.
- the manufacturing method of the acid hardening agent by which the acidic group was blocked with the block compound is not specifically limited, the acid hardening agent is a carboxylic acid having a carboxyl group, and the block compound has an alcohol having a hydroxyl group or
- the acid hardening agent is a carboxylic acid having a carboxyl group
- the block compound has an alcohol having a hydroxyl group or
- carboxylic acid esters can be produced.
- the viscosity of the fluid 20 at 25 ° C. is preferably about 10 to 500 mPa ⁇ s, more preferably about 15 to 300 mPa ⁇ s, and further preferably about 20 to 100 mPa ⁇ s.
- a crack can be reliably formed.
- grains 2 in the injection 100 can be improved, and the particle
- Such a fluid 20 is preferably composed mainly of water and contains a compound such as a gelling agent and an electrolyte. By using such a compound, the viscosity of the fluid 20 can be easily and reliably adjusted to a value in the above range.
- a gelling agent for example, a polysaccharide such as cellulose, guar gum or a derivative thereof (hydroxyethyl derivative, carboxymethylhydroxyethyl derivative, hydroxypropyl derivative.
- the weight average of such a polysaccharide is used.
- the molecular weight is preferably about 100,000 to 5,000,000, and more preferably about 500,000 to 3,000,000.
- electrolyte examples include sodium chloride, potassium chloride, ammonium chloride, calcium chloride and the like.
- the fluid can also be prepared by adding a gelling agent or the like to an electrolyte aqueous solution (for example, seawater or brine solution) that exists in nature.
- FIG. 4 is a conceptual diagram for explaining a method of recovering hydrocarbons from the underground layer.
- a drilling hole 91 is dug in the vertical direction from the surface S to the target underground layer L containing hydrocarbons. Thereafter, when the excavation hole 91 reaches the underground layer L, the excavation direction is changed and the excavation hole 91 is dug in a horizontal direction within the underground layer L by a predetermined distance.
- the injection 100 as described above is injected into the underground layer L through the excavation hole 91 at a predetermined speed and pressure.
- the injecting agent 100 is injected into each crack 92, and each crack 92 is filled with a plurality of particles 2.
- the block compound is detached from the acid curing agent A due to the pressure and / or the temperature at the time of injecting the injection agent 100 into the crack 92.
- the acidic group with which the acid hardening agent A is provided is activated, and it contacts and reacts with the acid curable resin B in this state.
- the acid curable resin B is cured by the action of the acid curing agent A, and the outer surface of the particle 2 is coated with the cured product, whereby the coated particle 1 is generated.
- the block compound is injected before the injection agent 100 is injected into the crack 92, that is, when the injection agent 100 passes through the excavation hole 91 or the like, and does not leave the acid curing agent, and is injected into the crack 92. It is designed to be detached for the first time depending on conditions such as temperature and pressure. Therefore, before the injection agent 100 is injected into the crack 92, the acid curing agent A is blocked by the block compound, so that the curing of the acid curable resin B is prevented, and the injection agent 100 is injected into the crack 92. When the block compound is released, the acid curing agent A and the acid curable resin B react with each other, and the curing of the acid curable resin B in the crack 92 starts.
- the cracks 92 can be prevented from being blocked by the underground pressure by filling the cracks 92 with the coated particles 1. Thereby, the inflow efficiency of hydrocarbons from the underground layer L into the excavation hole 91 can be increased, and the recovery efficiency of hydrocarbons can be improved.
- furan resin 2 was obtained by adding 285 g of furfuryl alcohol and 95 g of furfural.
- Furan resin 3 0.9 g of hydrochloric acid (1.85 wt% aqueous solution) was added to 300 g of furfuryl alcohol to adjust the pH to 2.5, and then heated at 85 ° C. When the viscosity reached 400 cps, the heating was terminated. . Then, it cooled and added 0.8g of sodium hydroxide (50 wt% aqueous solution), and heated up to 83 degreeC under pressure reduction (68 mmHg). Subsequently, the furan resin 3 was obtained by cooling under normal pressure and adding 30g of furfuryl alcohol.
- Furan resin 5 0.9 g of hydrochloric acid (1.85 wt% aqueous solution) was added to 300 g of furfuryl alcohol to adjust the pH to 2.5, and then heated at 85 ° C. for 1 hour and 15 minutes to have a refractive index of 1.5. It was prepared as follows. Then, it cooled once and 120g of furfural was added. Further, 2.4 g of hydrochloric acid was added to adjust the pH to 2.5, and the mixture was heated at 93 ° C. When the viscosity reached 400 cps, the heating was terminated.
- Example 1A First, as acid curing agent A in which acidic groups are blocked, methyl p-toluenesulfonate (acid curing agent A: p-toluenesulfonic acid, block compound: methanol, manufactured by MRC Unitech, “PTSM”, MPTSA) and The furan resin 1 is prepared as the acid curable resin B, and the p-toluenesulfonic acid contained in methyl p-toluenesulfonate is 5 parts by weight with respect to 1,100 parts by weight of the furan resin. Thus, a resin composition was prepared.
- acid curing agent A p-toluenesulfonic acid, block compound: methanol, manufactured by MRC Unitech, “PTSM”, MPTSA
- the furan resin 1 is prepared as the acid curable resin B, and the p-toluenesulfonic acid contained in methyl p-toluenesulfonate is 5 parts by weight with respect to 1,
- a liquid (fluid) used in the hydraulic crushing method was mixed with sand particles having an average particle diameter of 250 ⁇ m and a resin composition to prepare an injection.
- the content of the sand particles in the entire injection agent was 9% by weight
- the content of the resin composition was 5 parts by weight with respect to 100 parts by weight of the particles.
- Example 2A As acid curing agent A in which acidic groups are blocked, p-toluenesulfonic acid amine salt (acid curing agent A blocked by forming a sulfonamide bond; “NACURE 2500” manufactured by Enomoto Kasei Co., Ltd.) is used. A resin composition and an injecting agent were prepared in the same manner as in Example 1A, except that it was not.
- Example 1B First, as acid curing agent A in which acidic groups are blocked, methyl p-toluenesulfonate (acid curing agent A: p-toluenesulfonic acid, block compound: methanol, manufactured by MRC Unitech, “PTSM”, MPTSA) and As the acid curable resin B, furan resin 1 was prepared, and these were mixed so that 1 part by weight of the furan resin 1,100 parts by weight of methyl p-toluenesulfonate was 5 parts by weight. I made a thing.
- acid curing agent A p-toluenesulfonic acid, block compound: methanol, manufactured by MRC Unitech, “PTSM”, MPTSA
- furan resin 1 was prepared, and these were mixed so that 1 part by weight of the furan resin 1,100 parts by weight of methyl p-toluenesulfonate was 5 parts by weight. I made a thing.
- Example 2B Except that a resin composition was prepared by mixing 1,100 parts by weight of furan resin with 1.5 parts by weight of methyl p-toluenesulfonate, the same procedure as in Example 1B was performed. The resin composition of Example 2B was obtained.
- Example 3B Except that a resin composition was prepared by mixing 1 part by weight of furan resin with 100 parts by weight of methyl p-toluenesulfonate so as to be 0.5 part by weight, the same procedure as in Example 1B was performed. The resin composition of Example 3B was obtained.
- Example 1C As acid curing agent A in which acidic groups were blocked, ethyl p-toluenesulfonate (acid curing agent A: p-toluenesulfonic acid, block compound: ethanol, manufactured by MRC Unitech, “PTSE”, EPTSA) was prepared. Except for this, the resin composition of Example 1C was obtained in the same manner as in Example 1B.
- Example 2C Except that a resin composition was prepared by mixing 1,100 parts by weight of furan resin with 1.5 parts by weight of ethyl p-toluenesulfonate, the same procedure as in Example 1C was performed. The resin composition of Example 2C was obtained.
- Example 3C The same procedure as in Example 1C was conducted, except that 1 part by weight of furan resin was mixed with 0.5 parts by weight of ethyl p-toluenesulfonate to prepare a resin composition. The resin composition of Example 3C was obtained.
- Example 1D As acid curing agent A in which acidic groups are blocked, propyl p-toluenesulfonate (acid curing agent A: p-toluenesulfonic acid, block compound: 1-propanol, manufactured by Tokyo Chemical Industry Co., Ltd., “p-toluenesulfonic acid” A resin composition of Example 1D was obtained in the same manner as in Example 1B except that “propyl”, PPTSA) was prepared.
- acid curing agent A p-toluenesulfonic acid, block compound: 1-propanol, manufactured by Tokyo Chemical Industry Co., Ltd.
- p-toluenesulfonic acid A resin composition of Example 1D was obtained in the same manner as in Example 1B except that “propyl”, PPTSA) was prepared.
- Example 2D Except that a resin composition was prepared by mixing 1,100 parts by weight of furan resin with 1.5 parts by weight of propyl p-toluenesulfonate, the same procedure as in Example 1D was performed. The resin composition of Example 2D was obtained.
- Example 3D Except that a resin composition was prepared by mixing furan resin (1,100 parts by weight) with 0.75 parts by weight of p-toluenesulfonic acid propyl ester, the same procedure as in Example 1D was performed. The resin composition of Example 3D was obtained.
- Example 4D The same procedure as in Example 1D was conducted, except that a resin composition was prepared by mixing 1,100 parts by weight of furan resin with 0.5 parts by weight of propyl p-toluenesulfonate. The resin composition of Example 4D was obtained.
- Example 1E As acid curing agent A in which acidic groups are blocked, hexyl p-toluenesulfonate (acid curing agent A: p-toluenesulfonic acid, block compound: 1-hexanol, manufactured by Tokyo Chemical Industry Co., Ltd., “p-toluenesulfonic acid”) A resin composition of Example 1E was obtained in the same manner as in Example 1B except that “hexyl”, HPTSA) was prepared.
- Example 2E Except that a resin composition was prepared by mixing 2.5 parts by weight of p-toluenesulfonic acid hexyl with 1,100 parts by weight of furan resin, the same procedure as in Example 1E was performed. The resin composition of Example 2E was obtained.
- Example 3E Except that a resin composition was prepared by mixing 1,100 parts by weight of furan resin with 1.5 parts by weight of hexyl p-toluenesulfonate, the same procedure as in Example 1E was performed. The resin composition of Example 3E was obtained.
- Example 4E Except that a resin composition was prepared by mixing 0.5 parts by weight of propyl p-toluenesulfonate with 1,100 parts by weight of furan resin, the same procedure as in Example 1E was performed. The resin composition of Example 4E was obtained.
- Example 1F As acid curing agent A in which acidic groups are blocked, cyclohexyl p-toluenesulfonate (acid curing agent A: p-toluenesulfonic acid, block compound: cyclohexanol, manufactured by Tokyo Chemical Industry Co., Ltd., “cyclohexyl p-toluenesulfonate”
- acid curing agent A p-toluenesulfonic acid, block compound: cyclohexanol, manufactured by Tokyo Chemical Industry Co., Ltd.
- cyclohexyl p-toluenesulfonate The resin composition of Example 1F was obtained in the same manner as in Example 1B, except that “CHPTSA) was prepared.
- Example 2F Except that the resin composition was prepared by mixing 2.5 parts by weight of cyclohexyl p-toluenesulfonate with 1,100 parts by weight of the furan resin, the same procedure as in Example 1F was performed. The resin composition of Example 2F was obtained.
- Example 3F Except that the resin composition was prepared by mixing 0.5 parts by weight of cyclohexyl p-toluenesulfonate with 1,100 parts by weight of furan resin, the same procedure as in Example 1F was performed. The resin composition of Example 3F was obtained.
- Example 1G A p-toluenesulfonic acid amine salt (acid curing agent A: p-toluenesulfonic acid, block compound: amine compound, “Nacure2500” manufactured by King) was prepared as the acid curing agent A in which the acidic group was blocked. Except for the above, a resin composition of Example 1G was obtained in the same manner as in Example 1B. However, since the above product is a solvent-diluted product, it was added so that the amount of p-toluenesulfonic acid amine salt was the target amount.
- acid curing agent A p-toluenesulfonic acid, block compound: amine compound, “Nacure2500” manufactured by King
- Example 1H As acid curing agent A in which the acidic group is blocked, dodecylbenzenesulfonic acid ester (acid curing agent A: dodecylbenzenesulfonic acid, block compound: alcohol compound, manufactured by King, “Nacure5414”) is prepared. In the same manner as in Example 1B, a resin composition of Example 1H was obtained. However, since the above product is a solvent-diluted product, it was added so that the amount of dodecylbenzenesulfonic acid ester was the target amount.
- Example 2H Except that the resin composition was prepared by mixing 2.5 parts by weight of dodecylbenzenesulfonic acid ester with respect to 1,100 parts by weight of furan resin, Example 1H A 2H resin composition was obtained.
- Example 3H Except that a resin composition was prepared by mixing dodecylbenzenesulfonic acid ester to 0.5 part by weight with respect to 1,100 parts by weight of furan resin, Example A 3H resin composition was obtained.
- Example 1J Other than preparing dinonyl naphthalene sulfonic acid ester (acid curing agent A: dinonyl naphthalene sulfonic acid, block compound: alcohol compound, manufactured by King, “Nacure 1419”) as acid curing agent A in which acidic groups are blocked
- acid curing agent A dinonyl naphthalene sulfonic acid, block compound: alcohol compound, manufactured by King, “Nacure 1419”
- a resin composition of Example 1J was obtained. However, since the above product is a solvent-diluted product, it was added so that the amount of dinonylnaphthalene sulfonate was the target amount.
- Example 2J Except that a resin composition was prepared by mixing dodecylbenzenesulfonic acid ester to 2.5 parts by weight with respect to 1,100 parts by weight of furan resin, an example was obtained in the same manner as in Example 1J. A 2J resin composition was obtained.
- Example 3J Except that the resin composition was prepared by mixing 1.5 parts by weight of dodecylbenzenesulfonic acid ester with respect to 1,100 parts by weight of furan resin, Example 1J A 3J resin composition was obtained.
- Example 4J Except that the resin composition was prepared by mixing dodecylbenzenesulfonic acid ester to 0.5 part by weight with respect to 1,100 parts by weight of furan resin, Example A 4J resin composition was obtained.
- Example 1K A resin composition of Example 1K was obtained in the same manner as in Example 1B except that furan resin 2 was used as the acid curable resin B.
- Example 2K Except that a resin composition was prepared by mixing 2,100 parts by weight of furan resin with 2.5 parts by weight of methyl p-toluenesulfonate, the same procedure as in Example 1K was performed. The resin composition of Example 2K was obtained.
- Example 3K Except that a resin composition was prepared by mixing 2,100 parts by weight of furan resin with 1.5 parts by weight of methyl p-toluenesulfonate, the same procedure as in Example 1K was performed. The resin composition of Example 3K was obtained.
- Example 4K Except that a resin composition was prepared by mixing 2,100 parts by weight of furan resin with 0.5 parts by weight of methyl p-toluenesulfonate, the same procedure as in Example 1K was performed. The resin composition of Example 4K was obtained.
- Example 1L was carried out in the same manner as in Example 1B except that a resin composition was prepared by mixing 3 parts by weight of furan resin with 10 parts by weight of methyl p-toluenesulfonate. A resin composition was obtained.
- Example 2L was performed in the same manner as in Example 1L, except that 3 parts by weight of furan resin was mixed with 5 parts by weight of methyl p-toluenesulfonate to prepare a resin composition. A resin composition was obtained.
- Example 3L Except that the resin composition was prepared by mixing 2.5 parts by weight of methyl p-toluenesulfonate with 3,100 parts by weight of furan resin, the same procedure as in Example 1L was performed. A resin composition of Example 3L was obtained.
- Example 4L Except that a resin composition was prepared by mixing 1.5 parts by weight of methyl p-toluenesulfonate with 3,100 parts by weight of furan resin, the same procedure as in Example 1L was performed. A resin composition of Example 4L was obtained.
- Example 5L Except that a resin composition was prepared by mixing 3,100 parts by weight of furan resin with 0.5 parts by weight of methyl p-toluenesulfonate, the same procedure as in Example 1L was performed. A resin composition of Example 5L was obtained.
- Example 1M was carried out in the same manner as in Example 1B, except that 4 parts by weight of furan resin was mixed with 10 parts by weight of methyl p-toluenesulfonate to prepare a resin composition. A resin composition was obtained.
- Example 2M was conducted in the same manner as in Example 1M, except that 4 parts by weight of furan resin was mixed with 5 parts by weight of methyl p-toluenesulfonate to prepare a resin composition. A resin composition was obtained.
- Example 3M Except that a resin composition was prepared by mixing 2.5 parts by weight of methyl p-toluenesulfonate with 4,100 parts by weight of furan resin, the same procedure as in Example 1M was performed. A resin composition of Example 3M was obtained.
- Example 4M The same procedure as in Example 1M was conducted, except that 4,100 parts by weight of furan resin was mixed with 1.5 parts by weight of methyl p-toluenesulfonate to prepare a resin composition. A resin composition of Example 4M was obtained.
- Example 5M Except that a resin composition was prepared by mixing 4 parts by weight of furan resin with 100 parts by weight of methyl p-toluenesulfonate so as to be 0.5 parts by weight, the same procedure as in Example 1M was performed. A resin composition of Example 5M was obtained.
- Example 1N was conducted in the same manner as in Example 1B, except that 5 parts by weight of furan resin was mixed with 15 parts by weight of methyl p-toluenesulfonate to prepare a resin composition. A resin composition was obtained.
- Example 2N was carried out in the same manner as in Example 1N except that 5 parts by weight of furan resin was mixed with 5 parts by weight of methyl p-toluenesulfonate to prepare a resin composition. A resin composition was obtained.
- Example 3N Except that a resin composition was prepared by mixing 2.5 parts by weight of methyl p-toluenesulfonate with 5,100 parts by weight of furan resin, the same procedure as in Example 1N was performed. A resin composition of Example 3N was obtained.
- Example 4N Except that the resin composition was prepared by mixing 1.5 parts by weight of methyl p-toluenesulfonate with respect to 5,100 parts by weight of the furan resin, the same procedure as in Example 1N was performed. A resin composition of Example 4N was obtained.
- Example 5N The same procedure as in Example 1N was conducted, except that 5 parts by weight of furan resin was mixed with 0.5 parts by weight of methyl p-toluenesulfonate to prepare a resin composition. A resin composition of Example 5N was obtained.
- Example 1O Resole-type phenol resin 1 is used as acid-curable resin B. Resole-type phenol resin 1 resin is mixed with 5 parts by weight of 100 parts by weight of p-toluenesulfonic acid methyl so as to be 2.5 parts by weight. A resin composition of Example 1O was obtained in the same manner as in Example 1B except that the composition was prepared.
- Example 2O Except that the resin composition was prepared by mixing 1.5 parts by weight of methyl p-toluenesulfonate with 1,100 parts by weight of the resol type phenol resin, the same as in Example 1O. A resin composition of Example 2O was obtained.
- Example 3O Except that the resin composition was prepared by mixing 0.5 parts by weight of methyl p-toluenesulfonate with 1,100 parts by weight of the resol type phenol resin, the same as in Example 1O. A resin composition of Example 3O was obtained.
- Comparative Example 2B A resin composition of Comparative Example 2B was obtained in the same manner as in Example 1B, except that the addition of methyl p-toluenesulfonate, which was acid curing agent A with acidic groups blocked, was omitted.
- each of the resin compositions of Examples 1B to 3B, 1C to 3C, 1D to 3D, 1E to 3E, 3F, 3H, 2J, 3J, 4K, 2L to 4L, 4M, 5M, 4N, 5N, and 3O was water.
- Examples 1B, 2B, 1C, 2C, 1E, 3E, 1F, 2F, 1H, 2H, 1J to 3J, 1K to 3K, 1L, 2L, 1M to 3M, 1N to 3N, 1O to 3O, comparative examples The degree of curing when heated at a temperature of 60 ° C. for 32 hours with water added to the resin compositions 1B and 2B so that the weight ratio of the solid component of the furan resin to water is 1: 1. Observation was made by palpation at predetermined intervals.
- Example 1P First, as acid curing agent A in which acidic groups are blocked, methyl p-toluenesulfonate (acid curing agent A: p-toluenesulfonic acid, block compound: methanol, manufactured by MRC Unitech, “PTSM”, MPTSA)) And acid curable resin B, acid curable resin B, and furan resin 1 are prepared, respectively, so that methyl p-toluenesulfonate is 5 parts by weight with respect to 100 parts by weight of furan resin. A resin composition was prepared by mixing.
- Example 2P A resin composition and an injection agent of Example 2P were prepared in the same manner as in Example 1P except that an aqueous solution of potassium chloride of guar gum was used as the liquid (fluid).
- Example 3P As acid curing agent A in which acidic groups were blocked, ethyl p-toluenesulfonate (acid curing agent A: p-toluenesulfonic acid, block compound: ethanol, manufactured by MRC Unitech, “PTSE”, EPTSA) was prepared. Except for this, the resin composition and the injection agent of Example 3P were prepared in the same manner as in Example 1P.
- Example 4P As acid curing agent A in which acidic groups are blocked, hexyl p-toluenesulfonate (acid curing agent A: p-toluenesulfonic acid, block compound: 1-hexanol, manufactured by Tokyo Chemical Industry Co., Ltd., “p-toluenesulfonic acid”)
- acid curing agent A p-toluenesulfonic acid, block compound: 1-hexanol, manufactured by Tokyo Chemical Industry Co., Ltd., “p-toluenesulfonic acid”
- the resin composition and the injection agent of Example 4N were prepared in the same manner as in Example 1P except that “propyl”, HPTSA) was prepared.
- Example 1P As in Example 1P, except that a mixture of a bisphenol A type epoxy resin (manufactured by Mitsubishi Chemical Corporation, “828EL”) and a curing agent (manufactured by Tokyo Chemical Industry Co., Ltd., “TEPA”) was used as the resin composition. Thus, the resin composition and the injection agent of Comparative Example 1N were prepared. In addition, content of the hardening
- Comparative Example 2P A resin composition and an injection of Comparative Example 2N were prepared in the same manner as Comparative Example 1P, except that a guar gum potassium chloride aqueous solution was used as the liquid (fluid).
- the present invention relates to a resin composition used for forming a surface layer that covers at least a part of the outer surface of particles filled in cracks formed in an underground layer, comprising an acid curing agent, an acid An acid curable resin that cures in the presence, and the acid curing agent is present in a state where an acidic group included in the acid curing agent is blocked by a compound having reactivity with the acidic group.
- the acid curable resin is prepared at a temperature of 50 ° C. or higher and 110 ° C. or lower for 2 hours or more and 8 hours or less by preparing the acid curable resin, the acid curing agent and the type and content of the compound, respectively. It is characterized in that it is set to start curing.
- the present invention has industrial applicability.
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Abstract
Description
(1) 地下層中に形成された亀裂に充填される粒子の外表面の少なくとも一部を被覆する表面層を形成するために用いられる樹脂組成物であって、
酸硬化剤と、酸の存在下で硬化する酸硬化性樹脂とを含有し、
前記酸硬化剤は、このものが備える酸性基が、該酸性基に対して反応性を有する化合物によりブロック化された状態で存在しており、
前記酸硬化性樹脂、前記酸硬化剤および前記化合物の種類および含有量をそれぞれ調製することにより、
前記酸硬化性樹脂が50℃以上110℃以下の温度で、2時間以上8時間以下の時間内に硬化を開始するように設定したことを特徴とする樹脂組成物。
(3) 前記化合物は、官能基を備え、前記酸硬化剤の前記酸性基に化学結合することで、前記酸硬化剤をブロック化する上記(1)または(2)に記載の樹脂組成物。
(5) 前記化合物は、前記官能基として水酸基を備えるアルキルアルコールである上記(3)または(4)に記載の樹脂組成物。
(7) 前記一価アルキルアルコールは、その炭素数が1以上、10以下である上記(6)に記載の樹脂組成物。
(9) 前記化合物は、前記官能基の数が、前記酸性基の数を1としたとき、酸性基:官能基=1:0.1~1.9となるように含まれている上記(3)ないし(8)のいずれか1項に記載の樹脂組成物。
(11) 前記酸硬化剤は、p-トルエンスルホン酸、ベンゼンスルホン酸、ドデシルベンゼンスルホン酸、フェノールスルホン酸、ナフタレンスルホン酸、ジノニルナフタレンスルホン酸およびジノニルナフタレンジスルホン酸よりなる群から選択される少なくとも1種を含む上記(10)に記載の樹脂組成物。
(13) 前記酸硬化性樹脂は、フラン樹脂およびフェノール樹脂よりなる群から選択される少なくとも1種を含む上記(1)ないし(12)のいずれか1項に記載の樹脂組成物。
酸硬化剤としてのフラン樹脂と、酸の存在下で硬化する酸硬化性樹脂してのパラトルエンスルホン酸とを含有し、
前記パラトルエンスルホン酸は、このものが備えるスルホン酸基が、該スルホン酸基に対して反応性を有する化合物としての炭素数1~6の1価アルキルアルコールによりブロック化された状態で存在しており、
前記1価アルキルアルコールでブロック化された前記パラトルエンスルホン酸の前記フラン樹脂100重量部に対する含有量を0.25~20重量部に調製することにより、
前記フラン樹脂が70℃以上90℃以下の温度で、4時間以上6時間以下の範囲内に硬化を開始するように設定したことを特徴とする樹脂組成物。
前記亀裂に充填される粒子と、
上記(1)ないし(14)のいずれか1項に記載の樹脂組成物と、
前記粒子および前記樹脂組成物を前記亀裂に移送するための流体とを含むことを特徴とする注入剤。
(16) 前記粒子の平均粒径は、100~3,000μmである上記(15)に記載の注入剤。
(18) 前記樹脂組成物の含有量は、前記粒子100重量部に対して1~20重量部である上記(15)ないし(17)のいずれか1項に記載の注入剤。
前記注入剤を前記亀裂に注入する際の圧力および/または地中の温度を要因として、前記化合物が前記酸硬化剤から離脱することにより、前記酸硬化剤と前記酸硬化性樹脂とを反応させ、前記酸硬化剤の作用により前記酸硬化性樹脂を硬化させるとともに、その硬化物で前記粒子の外表面の少なくとも一部を被覆することを特徴とする充填方法。
図1は、本発明の注入剤の実施形態を示す図、図2は、粒子が酸硬化性樹脂の硬化物で被覆された被覆粒子を示す部分断面図、および、図3は、図2に示す被覆粒子に圧力が付与された状態を示す部分断面図である。
注入剤100は、本発明の樹脂組成物として、酸硬化剤Aと、酸の存在下で硬化する酸硬化性樹脂B、すなわち酸硬化剤Aの作用により硬化する酸硬化性樹脂Bとを含んでいる。
また、「化学結合」としては、ブロック化合物が有する官能基と、酸硬化剤Aが備える酸性基との反応により、酸硬化性樹脂の硬化が進行する反応性を不活化させ得るものであればよく、例えば、共有結合、配位結合のような分子内結合、イオン結合、水素結合のような分子間の化学結合が挙げられる。
また、フルフラール以外のアルデヒドとのコポリマーを使用してもよく、ホルムアルデヒド、パラホルムアルデヒド、トリオキサン、アセトアルデヒド、プロピオンアルデヒド、ポリオキシメチレン、クロラール、ヘキサメチレンテトラミン、フルフラール、グリオキザール、n-ブチルアルデヒド、カプロアルデヒド、アリルアルデヒド、ベンズアルデヒド、クロトンアルデヒド、アクロレイン、テトラオキシメチレン、フェニルアセトアルデヒド、o-トルアルデヒド、サリチルアルデヒド、パラキシレンジメチルエーテル等を使用して得られるフルフリルアルコールとアルデヒドのコポリマーを使用してもよい。
この中でも、レゾール型フェノール樹脂が好ましく用いられる。レゾール型フェノール樹脂は、フェノール類とアルデヒド類を混合し、塩基を添加して塩基性条件下で加熱し反応させることで得られる。反応後は酸により中和しておくことで樹脂単体での増粘を抑えることができる。
このような酸硬化剤Aとしては、酸性基を備えこの酸性基の作用により前記触媒としての機能を発揮し得るものであれば如何なるものであってもよく、例えば、p-トルエンスルホン酸、ベンゼンスルホン酸、ドデシルベンゼンスルホン酸、フェノールスルホン酸、ナフタレンスルホン酸、ジノニルナフタレンスルホン酸、ジノニルナフタレンジスルホン酸、キシレンスルホン酸およびメタンスルホン酸のような酸性基としてスルホン酸基を有するもの、酢酸、乳酸、マレイン酸、安息香酸、フルオロ酢酸のような酸性基としてカルボキシル基を有するもの等が挙げられ、これらのうちの1種または2種以上を組み合わせて用いることができる。
官能基としては、酸性基に対して反応してブロック化合物を酸硬化剤Aに連結(化学結合)させ得るものであれば如何なるものであってもよく、例えば、水酸基およびアミノ基等が挙げられ、これらのうちの1種または2種以上を組み合わせて用いることができる。このような官能基を有するブロック化合物は、酸硬化剤Aが有する酸性基に対して優れた反応性を備えていることから、官能基と酸性基とを反応(化学結合)させてブロック化合物で酸硬化剤Aを確実にブロック化させることができる。
また、一価アルキルアルコールとしては、アルキル基として直鎖型、分枝型または環状型のものを備えるもののいずれであってもよい。
また、1級アルコールと2級アルコールとの関係は、高級アルコールと低級アルコールの関係と同様である
ゲル化剤としては、例えば、セルロース、グァーガムまたはこれらの誘導体(ハイドロキシエチル誘導体、カルボキシメチルハイドロキシエチル誘導体、ハイドロキシプロピル誘導体のような多糖類が好適に用いられる。なお、このような多糖類の重量平均分子量は、100,000~5,000,000程度であるのが好ましく、500,000~3,000,000程度であるのがより好ましい。
図4は、地下層から炭化水素を回収する方法を説明するための概念図である。
また、注入剤100を亀裂92に注入する際の圧力および/または地中の温度を要因として、ブロック化合物が酸硬化剤Aから離脱する。これにより、酸硬化剤Aが備える酸性基が活性化され、この状態で、酸硬化性樹脂Bと接触、反応する。このとき、酸硬化剤Aの作用により酸硬化性樹脂Bが硬化するとともに、その硬化物で粒子2の外表面が被覆され、被覆粒子1が生成する。
以上のような工程[1]~[3]が、本発明の充填方法に相当する。
なお、注入剤100を用いて、前記工程[2]および[3]を同時に行ってもよい。すなわち、地下層L中に複数の亀裂92を形成しつつ、各亀裂92に複数の粒子2を充填するようにしてもよい。
A.酸硬化性樹脂Bの合成方法
1-1.樹脂組成物および注入剤の作成
まず、酸性基がブロック化された酸硬化剤Aとして、p-トルエンスルホン酸メチル(酸硬化剤A:p-トルエンスルホン酸、ブロック化合物:メタノール、MRCユニテック社製、「PTSM」、MPTSA)と、酸硬化性樹脂Bとして、フラン樹脂1とをそれぞれ用意し、これらをフラン樹脂1、100重量部に対して、p-トルエンスルホン酸メチルに含まれるp-トルエンスルホン酸が5重量部となるように混合して、樹脂組成物を作成した。
なお、注入剤全体における砂粒子の含有量は、9重量%、樹脂組成物の含有量は、粒子100重量部に対して5重量部とした。
酸性基がブロック化された酸硬化剤Aとして、p-トルエンスルホン酸アミン塩(スルホンアミド結合を形成することによりブロック化された酸硬化剤A;楠本化成社製、「NACURE 2500」)を用いたこと以外は、前記実施例1Aと同様にして、樹脂組成物および注入剤を作成した。
得られた実施例1Aおよび実施例2Aの注入剤を、それぞれ、圧力6,000psiかつ温度80℃の条件で加熱・加圧した。
その結果、実施例1Aおよび実施例2Aの注入剤から得られた砂粒子は、ともに、その外表面がフルフリルアルコール樹脂の硬化物で被覆されることが確認された。
2-1.樹脂組成物の作成
まず、酸性基がブロック化された酸硬化剤Aとして、p-トルエンスルホン酸メチル(酸硬化剤A:p-トルエンスルホン酸、ブロック化合物:メタノール、MRCユニテック社製、「PTSM」、MPTSA)と、酸硬化性樹脂Bとして、フラン樹脂1とをそれぞれ用意し、これらをフラン樹脂1、100重量部に対して、p-トルエンスルホン酸メチルが5重量部となるように混合して、樹脂組成物を作成した。
フラン樹脂1、100重量部に対して、p-トルエンスルホン酸メチルを1.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Bと同様にして、実施例2Bの樹脂組成物を得た。
フラン樹脂1、100重量部に対して、p-トルエンスルホン酸メチルを0.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Bと同様にして、実施例3Bの樹脂組成物を得た。
酸性基がブロック化された酸硬化剤Aとして、p-トルエンスルホン酸エチル(酸硬化剤A:p-トルエンスルホン酸、ブロック化合物:エタノール、MRCユニテック社製、「PTSE」、EPTSA)を用意したこと以外は、前記実施例1Bと同様にして、実施例1Cの樹脂組成物を得た。
フラン樹脂1、100重量部に対して、p-トルエンスルホン酸エチルを1.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Cと同様にして、実施例2Cの樹脂組成物を得た。
フラン樹脂1、100重量部に対して、p-トルエンスルホン酸エチルを0.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Cと同様にして、実施例3Cの樹脂組成物を得た。
酸性基がブロック化された酸硬化剤Aとして、p-トルエンスルホン酸プロピル(酸硬化剤A:p-トルエンスルホン酸、ブロック化合物:1-プロパノール、東京化成工業社製、「p-トルエンスルホン酸プロピル」、PPTSA)を用意したこと以外は、前記実施例1Bと同様にして、実施例1Dの樹脂組成物を得た。
フラン樹脂1、100重量部に対して、p-トルエンスルホン酸プロピルを1.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Dと同様にして、実施例2Dの樹脂組成物を得た。
フラン樹脂1、100重量部に対して、p-トルエンスルホン酸プロピルを0.75重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Dと同様にして、実施例3Dの樹脂組成物を得た。
フラン樹脂1、100重量部に対して、p-トルエンスルホン酸プロピルを0.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Dと同様にして、実施例4Dの樹脂組成物を得た。
酸性基がブロック化された酸硬化剤Aとして、p-トルエンスルホン酸ヘキシル(酸硬化剤A:p-トルエンスルホン酸、ブロック化合物:1-ヘキサノール、東京化成工業社製、「p-トルエンスルホン酸ヘキシル」、HPTSA)を用意したこと以外は、前記実施例1Bと同様にして、実施例1Eの樹脂組成物を得た。
フラン樹脂1、100重量部に対して、p-トルエンスルホン酸ヘキシルを2.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Eと同様にして、実施例2Eの樹脂組成物を得た。
フラン樹脂1、100重量部に対して、p-トルエンスルホン酸ヘキシルを1.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Eと同様にして、実施例3Eの樹脂組成物を得た。
フラン樹脂1、100重量部に対して、p-トルエンスルホン酸プロピルを0.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Eと同様にして、実施例4Eの樹脂組成物を得た。
酸性基がブロック化された酸硬化剤Aとして、p-トルエンスルホン酸シクロヘキシル(酸硬化剤A:p-トルエンスルホン酸、ブロック化合物:シクロヘキサノール、東京化成工業社製、「p-トルエンスルホン酸シクロヘキシル」、CHPTSA)を用意したこと以外は、前記実施例1Bと同様にして、実施例1Fの樹脂組成物を得た。
フラン樹脂1、100重量部に対して、p-トルエンスルホン酸シクロヘキシルを 2.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Fと同様にして、実施例2Fの樹脂組成物を得た。
フラン樹脂1、100重量部に対して、p-トルエンスルホン酸シクロヘキシルを 0.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Fと同様にして、実施例3Fの樹脂組成物を得た。
酸性基がブロック化された酸硬化剤Aとして、p-トルエンスルホン酸アミン塩(酸硬化剤A:p-トルエンスルホン酸、ブロック化合物:アミン化合物、King社製、「Nacure2500」)を用意したこと以外は、前記実施例1Bと同様にして、実施例1Gの樹脂組成物を得た。ただし、上記製品は溶剤希釈品であるため、p-トルエンスルホン酸アミン塩の量が目的の量になるように添加した。
酸性基がブロック化された酸硬化剤Aとして、ドデシルベンゼンスルホン酸エステル(酸硬化剤A:ドデシルベンゼンスルホン酸、ブロック化合物:アルコール化合物、King社製、「Nacure5414」)を用意したこと以外は、前記実施例1Bと同様にして、実施例1Hの樹脂組成物を得た。ただし、上記製品は溶剤希釈品であるため、ドデシルベンゼンスルホン酸エステルの量が目的の量になるように添加した。
フラン樹脂1、100重量部に対して、ドデシルベンゼンスルホン酸エステルを2.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Hと同様にして、実施例2Hの樹脂組成物を得た。
フラン樹脂1、100重量部に対して、ドデシルベンゼンスルホン酸エステルを0.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Hと同様にして、実施例3Hの樹脂組成物を得た。
酸性基がブロック化された酸硬化剤Aとして、ジノニルナフタレンスルホン酸エステル(酸硬化剤A:ジノニルナフタレンスルホン酸、ブロック化合物:アルコール化合物、King社製、「Nacure1419」)を用意したこと以外は、前記実施例1Bと同様にして、実施例1Jの樹脂組成物を得た。ただし、上記製品は溶剤希釈品であるため、ジノニルナフタレンスルホン酸エステルの量が目的の量になるように添加した。
フラン樹脂1、100重量部に対して、ドデシルベンゼンスルホン酸エステルを2.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Jと同様にして、実施例2Jの樹脂組成物を得た。
フラン樹脂1、100重量部に対して、ドデシルベンゼンスルホン酸エステルを 1.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Jと同様にして、実施例3Jの樹脂組成物を得た。
フラン樹脂1、100重量部に対して、ドデシルベンゼンスルホン酸エステルを 0.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Jと同様にして、実施例4Jの樹脂組成物を得た。
酸硬化性樹脂Bとして、フラン樹脂2を用いたこと以外は、前記実施例1Bと同様にして、実施例1Kの樹脂組成物を得た。
フラン樹脂2、100重量部に対して、p-トルエンスルホン酸メチルを2.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Kと同様にして、実施例2Kの樹脂組成物を得た。
フラン樹脂2、100重量部に対して、p-トルエンスルホン酸メチルを1.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Kと同様にして、実施例3Kの樹脂組成物を得た。
フラン樹脂2、100重量部に対して、p-トルエンスルホン酸メチルを0.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Kと同様にして、実施例4Kの樹脂組成物を得た。
フラン樹脂3、100重量部に対して、p-トルエンスルホン酸メチルを10重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Bと同様にして、実施例1Lの樹脂組成物を得た。
フラン樹脂3、100重量部に対して、p-トルエンスルホン酸メチルを5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Lと同様にして、実施例2Lの樹脂組成物を得た。
フラン樹脂3、100重量部に対して、p-トルエンスルホン酸メチルを2.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Lと同様にして、実施例3Lの樹脂組成物を得た。
フラン樹脂3、100重量部に対して、p-トルエンスルホン酸メチルを1.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Lと同様にして、実施例4Lの樹脂組成物を得た。
フラン樹脂3、100重量部に対して、p-トルエンスルホン酸メチルを0.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Lと同様にして、実施例5Lの樹脂組成物を得た。
フラン樹脂4、100重量部に対して、p-トルエンスルホン酸メチルを10重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Bと同様にして、実施例1Mの樹脂組成物を得た。
フラン樹脂4、100重量部に対して、p-トルエンスルホン酸メチルを5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Mと同様にして、実施例2Mの樹脂組成物を得た。
フラン樹脂4、100重量部に対して、p-トルエンスルホン酸メチルを2.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Mと同様にして、実施例3Mの樹脂組成物を得た。
フラン樹脂4、100重量部に対して、p-トルエンスルホン酸メチルを1.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Mと同様にして、実施例4Mの樹脂組成物を得た。
フラン樹脂4、100重量部に対して、p-トルエンスルホン酸メチルを0.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Mと同様にして、実施例5Mの樹脂組成物を得た。
フラン樹脂5、100重量部に対して、p-トルエンスルホン酸メチルを15重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Bと同様にして、実施例1Nの樹脂組成物を得た。
フラン樹脂5、100重量部に対して、p-トルエンスルホン酸メチルを5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Nと同様にして、実施例2Nの樹脂組成物を得た。
フラン樹脂5、100重量部に対して、p-トルエンスルホン酸メチルを2.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Nと同様にして、実施例3Nの樹脂組成物を得た。
フラン樹脂5、100重量部に対して、p-トルエンスルホン酸メチルを1.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Nと同様にして、実施例4Nの樹脂組成物を得た。
フラン樹脂5、100重量部に対して、p-トルエンスルホン酸メチルを0.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Nと同様にして、実施例5Nの樹脂組成物を得た。
酸硬化性樹脂Bとして、レゾール型フェノール樹脂1を用い、レゾール型フェノール樹脂1樹脂5、100重量部に対して、p-トルエンスルホン酸メチルを2.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Bと同様にして、実施例1Oの樹脂組成物を得た。
レゾール型フェノール樹脂1、100重量部に対して、p-トルエンスルホン酸メチルを1.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Oと同様にして、実施例2Oの樹脂組成物を得た。
レゾール型フェノール樹脂1、100重量部に対して、p-トルエンスルホン酸メチルを0.5重量部となるように混合して樹脂組成物を作成したこと以外は、前記実施例1Oと同様にして、実施例3Oの樹脂組成物を得た。
酸性基がブロック化された酸硬化剤Aであるp-トルエンスルホン酸メチルに代えて、酸性基のブロック化がなされていない酸硬化剤Aであるp-トルエンスルホン酸を用意したこと以外は、前記実施例1Bと同様にして、比較例1Bの樹脂組成物を得た。
酸性基がブロック化された酸硬化剤Aであるp-トルエンスルホン酸メチルの添加を省略したこと以外は、前記実施例1Bと同様にして、比較例2Bの樹脂組成物を得た。
実施例2B、3B、2C、3C、2D、4D、3E、4E、1G、3H、4J、4L、5L、4M、5M、4N、5Nおよび比較例2Bの樹脂組成物にそれぞれ水を、樹脂と水との重量比が2:1となるように添加した状態で、温度100℃で32時間加熱した際の硬化の度合いを所定の時間毎に触診にて観察した。
その結果を、それぞれ、図5~15に示す。
3-1.樹脂組成物および注入剤の作成
まず、酸性基がブロック化された酸硬化剤Aとして、p-トルエンスルホン酸メチル(酸硬化剤A:p-トルエンスルホン酸、ブロック化合物:メタノール、MRCユニテック社製、「PTSM」、MPTSA))と、酸硬化性樹脂Bとして、酸硬化性樹脂Bとして、フラン樹脂1とをそれぞれ用意し、これらをフラン樹脂100重量部に対して、p-トルエンスルホン酸メチルが5重量部となるように混合して、樹脂組成物を作成した。
なお、樹脂組成物の含有量は、注入剤全体に対して、酸硬化性樹脂Bの含有量が2.5重量%となるようにした。
液体(流体)としてグァーガムの塩化カリウム水溶液を用いたこと以外は、前記実施例1Pと同様にして、実施例2Pの樹脂組成物および注入剤を作成した。
酸性基がブロック化された酸硬化剤Aとして、p-トルエンスルホン酸エチル(酸硬化剤A:p-トルエンスルホン酸、ブロック化合物:エタノール、MRCユニテック社製、「PTSE」、EPTSA)を用意したこと以外は、前記実施例1Pと同様にして、実施例3Pの樹脂組成物および注入剤を作成した。
酸性基がブロック化された酸硬化剤Aとして、p-トルエンスルホン酸ヘキシル(酸硬化剤A:p-トルエンスルホン酸、ブロック化合物:1-ヘキサノール、東京化成工業社製、「p-トルエンスルホン酸プロピル」、HPTSA)を用意したこと以外は、前記実施例1Pと同様にして、実施例4Nの樹脂組成物および注入剤を作成した。
樹脂組成物として、ビスフェノールA型エポキシ樹脂(三菱化学社製、「828EL」)と、硬化剤(東京化成社製、「TEPA」)との混合物を用いたこと以外は、前記実施例1Pと同様にして、比較例1Nの樹脂組成物および注入剤を作成した。
なお、樹脂組成物中における硬化剤の含有量は、エポキシ樹脂100重量部に対して、14重量部とした。
液体(流体)としてグァーガムの塩化カリウム水溶液を用いたこと以外は、前記比較例1Pと同様にして、比較例2Nの樹脂組成物および注入剤を作成した。
得られた各実施例および各比較例の注入剤を、それぞれ、円筒状をなすアルミホイル製の有底筒体中に注入し、この状態で加熱した後、筒体を取り除くことで、直径約50mm×高さ約20mmの硬化物を得た。
なお、硬化物を得る際の加熱条件を、実施例1P、2P、比較例2Pでは60℃×20時間、実施例3Pでは80℃×20時間、実施例4Pでは100℃×20時間として、それぞれ、1つの硬化物を得、比較例1Pでは、60℃×20時間、80℃×20時間および100℃×20時間として、3つの硬化物を得た。60℃での加熱時には2時間後に上澄みの注入剤を取り除いた。
その結果を、それぞれ、図16、17に示す。
図16~17に示すように、各実施例の注入剤から得られた硬化物は、各比較例の注入剤から得られた硬化物と比較して、優れた圧縮強度を示す結果となった。これは、各実施例では、酸硬化性樹脂Bの硬化が、砂粒子に酸硬化性樹脂Bを付着させた(絡み合わせた)状態で開始していることに起因しているものと推察された。
2 粒子
3 表面層
A 酸硬化剤
B 酸硬化性樹脂
20 流体
100 注入剤(樹脂組成物)
91 掘削穴
92 亀裂
L 地下層
P ポンプ
S 地表
Claims (19)
- 地下層中に形成された亀裂に充填される粒子の外表面の少なくとも一部を被覆する表面層を形成するために用いられる樹脂組成物であって、
酸硬化剤と、酸の存在下で硬化する酸硬化性樹脂とを含有し、
前記酸硬化剤は、このものが備える酸性基が、該酸性基に対して反応性を有する化合物によりブロック化された状態で存在しており、
前記酸硬化性樹脂、前記酸硬化剤および前記化合物の種類および含有量をそれぞれ調製することにより、
前記酸硬化性樹脂が50℃以上110℃以下の温度で、2時間以上8時間以下の時間内に硬化を開始するように設定したことを特徴とする樹脂組成物。 - 前記酸硬化性樹脂は、48時間以内に硬化を完了するように設定されている請求項1に記載の樹脂組成物。
- 前記化合物は、官能基を備え、該官能基が前記酸硬化剤の前記酸性基に化学結合することで、前記酸硬化剤をブロック化する請求項1または2に記載の樹脂組成物。
- 前記官能基は、水酸基およびアミノ基よりなる群から選択される少なくとも1種を含む請求項3に記載の樹脂組成物。
- 前記化合物は、前記官能基として水酸基を備えるアルキルアルコールである請求項3または4に記載の樹脂組成物。
- 前記アルキルアルコールは、一価アルキルアルコールである請求項5に記載の樹脂組成物。
- 前記一価アルキルアルコールは、その炭素数が1以上、10以下である請求項6に記載の樹脂組成物。
- 前記化合物は、前記官能基としてアミノ基を備えるアルキルアミンである請求項3または4に記載の樹脂組成物。
- 前記化合物は、前記官能基の数が、前記酸性基の数を1としたとき、酸性基:官能基=1:0.1~1.9となるように含まれている請求項3ないし8のいずれか1項に記載の樹脂組成物。
- 前記酸性基は、スルホン酸基を含む請求項1ないし9のいずれか1項に記載の樹脂組成物。
- 前記酸硬化剤は、p-トルエンスルホン酸、ベンゼンスルホン酸、ドデシルベンゼンスルホン酸、フェノールスルホン酸、ナフタレンスルホン酸、ジノニルナフタレンスルホン酸およびジノニルナフタレンジスルホン酸よりなる群から選択される少なくとも1種を含む請求項10に記載の樹脂組成物。
- 前記酸硬化剤の含有量は、前記酸硬化性樹脂100重量部に対して0.25重量部以上、20重量部以下である請求項1ないし11のいずれか1項に記載の樹脂組成物。
- 前記酸硬化性樹脂は、フラン樹脂およびフェノール樹脂よりなる群から選択される少なくとも1種を含む請求項1ないし12のいずれか1項に記載の樹脂組成物。
- 地下層中に形成された亀裂に充填される粒子の外表面の少なくとも一部を被覆する表面層を形成するために用いられる樹脂組成物であって、
酸硬化剤としてのフラン樹脂と、酸の存在下で硬化する酸硬化性樹脂してのパラトルエンスルホン酸とを含有し、
前記パラトルエンスルホン酸は、このものが備えるスルホン酸基が、該スルホン酸基に対して反応性を有する化合物としての炭素数1~6の1価アルキルアルコールによりブロック化された状態で存在しており、
前記1価アルキルアルコールでブロック化された前記パラトルエンスルホン酸の前記フラン樹脂100重量部に対する含有量を0.25~20重量部に調製することにより、
前記フラン樹脂が70℃以上90℃以下の温度で、4時間以上6時間以下の範囲内に硬化を開始するように設定したことを特徴とする樹脂組成物。 - 地下層中に形成された亀裂に注入される注入剤であって、
前記亀裂に充填される粒子と、
請求項1ないし14のいずれか1項に記載の樹脂組成物と、
前記粒子および前記樹脂組成物を前記亀裂に移送するための流体とを含むことを特徴とする注入剤。 - 前記粒子の平均粒径は、100~3,000μmである請求項15に記載の注入剤。
- 前記粒子の含有量は、5~50重量%である請求項15または16に記載の注入剤。
- 前記樹脂組成物の含有量は、前記粒子100重量部に対して1~20重量部である請求項15ないし17のいずれか1項に記載の注入剤。
- 請求項15ないし18のいずれか1項に記載の注入剤を地下層中に形成された亀裂に、前記地下層に至る掘削穴を介して移送し、前記注入剤を前記亀裂に注入することにより、前記粒子を前記亀裂に充填する充填方法であって、
前記注入剤を前記亀裂に注入する際の圧力および/または地中の温度を要因として、前記化合物が前記酸硬化剤から離脱することにより、前記酸硬化剤と前記酸硬化性樹脂とを反応させ、前記酸硬化剤の作用により前記酸硬化性樹脂を硬化させるとともに、その硬化物で前記粒子の外表面の少なくとも一部を被覆することを特徴とする充填方法。
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JP2018035333A (ja) * | 2016-08-25 | 2018-03-08 | 積水化学工業株式会社 | 硬化性組成物、硬化物、及び樹脂複合体 |
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CN113462374A (zh) * | 2020-03-30 | 2021-10-01 | 吉林大学 | 一种用于改造干热岩储层的压裂液及压裂方法 |
US11884878B1 (en) | 2022-07-22 | 2024-01-30 | Halliburton Energy Services, Inc. | Substituted amine acid salt activation of furfuryl alcohol-based resins |
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