WO2017022680A1 - カプセル剤及び粘度可変流体 - Google Patents
カプセル剤及び粘度可変流体 Download PDFInfo
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- WO2017022680A1 WO2017022680A1 PCT/JP2016/072381 JP2016072381W WO2017022680A1 WO 2017022680 A1 WO2017022680 A1 WO 2017022680A1 JP 2016072381 W JP2016072381 W JP 2016072381W WO 2017022680 A1 WO2017022680 A1 WO 2017022680A1
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- fluid
- viscosity
- capsule
- central portion
- butadiene copolymer
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- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000004153 Potassium bromate Substances 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000005083 Zinc sulfide Substances 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 1
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 description 1
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 235000019257 ammonium acetate Nutrition 0.000 description 1
- 229940043376 ammonium acetate Drugs 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- 239000001099 ammonium carbonate Substances 0.000 description 1
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 description 1
- 239000011609 ammonium molybdate Substances 0.000 description 1
- 235000018660 ammonium molybdate Nutrition 0.000 description 1
- 229940010552 ammonium molybdate Drugs 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 235000010233 benzoic acid Nutrition 0.000 description 1
- 229960004365 benzoic acid Drugs 0.000 description 1
- 229910052790 beryllium Inorganic materials 0.000 description 1
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 1
- WVMYSOZCZHQCSG-UHFFFAOYSA-N bis(sulfanylidene)zirconium Chemical compound S=[Zr]=S WVMYSOZCZHQCSG-UHFFFAOYSA-N 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 229910052792 caesium Inorganic materials 0.000 description 1
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- LHJQIRIGXXHNLA-UHFFFAOYSA-N calcium peroxide Chemical compound [Ca+2].[O-][O-] LHJQIRIGXXHNLA-UHFFFAOYSA-N 0.000 description 1
- 235000019402 calcium peroxide Nutrition 0.000 description 1
- 238000011088 calibration curve Methods 0.000 description 1
- 229940078916 carbamide peroxide Drugs 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- XTEGARKTQYYJKE-UHFFFAOYSA-N chloric acid Chemical compound OCl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-N 0.000 description 1
- 229940005991 chloric acid Drugs 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 235000019398 chlorine dioxide Nutrition 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- BHDAXLOEFWJKTL-UHFFFAOYSA-L dipotassium;carboxylatooxy carbonate Chemical compound [K+].[K+].[O-]C(=O)OOC([O-])=O BHDAXLOEFWJKTL-UHFFFAOYSA-L 0.000 description 1
- FGRVOLIFQGXPCT-UHFFFAOYSA-L dipotassium;dioxido-oxo-sulfanylidene-$l^{6}-sulfane Chemical compound [K+].[K+].[O-]S([O-])(=O)=S FGRVOLIFQGXPCT-UHFFFAOYSA-L 0.000 description 1
- AXZAYXJCENRGIM-UHFFFAOYSA-J dipotassium;tetrabromoplatinum(2-) Chemical compound [K+].[K+].[Br-].[Br-].[Br-].[Br-].[Pt+2] AXZAYXJCENRGIM-UHFFFAOYSA-J 0.000 description 1
- VTIIJXUACCWYHX-UHFFFAOYSA-L disodium;carboxylatooxy carbonate Chemical compound [Na+].[Na+].[O-]C(=O)OOC([O-])=O VTIIJXUACCWYHX-UHFFFAOYSA-L 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000010350 erythorbic acid Nutrition 0.000 description 1
- 239000004318 erythorbic acid Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 229960002598 fumaric acid Drugs 0.000 description 1
- 235000011087 fumaric acid Nutrition 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 239000000665 guar gum Substances 0.000 description 1
- 229960002154 guar gum Drugs 0.000 description 1
- 235000010417 guar gum Nutrition 0.000 description 1
- 229940093915 gynecological organic acid Drugs 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 229960004337 hydroquinone Drugs 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 229940026239 isoascorbic acid Drugs 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- NMHMDUCCVHOJQI-UHFFFAOYSA-N lithium molybdate Chemical compound [Li+].[Li+].[O-][Mo]([O-])(=O)=O NMHMDUCCVHOJQI-UHFFFAOYSA-N 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229960004995 magnesium peroxide Drugs 0.000 description 1
- UYNRPXVNKVAGAN-UHFFFAOYSA-L magnesium;diiodate Chemical compound [Mg+2].[O-]I(=O)=O.[O-]I(=O)=O UYNRPXVNKVAGAN-UHFFFAOYSA-L 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000001630 malic acid Substances 0.000 description 1
- 235000011090 malic acid Nutrition 0.000 description 1
- 229940099690 malic acid Drugs 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 150000004692 metal hydroxides Chemical class 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- NALMPLUMOWIVJC-UHFFFAOYSA-N n,n,4-trimethylbenzeneamine oxide Chemical compound CC1=CC=C([N+](C)(C)[O-])C=C1 NALMPLUMOWIVJC-UHFFFAOYSA-N 0.000 description 1
- 150000002843 nonmetals Chemical class 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 229940116315 oxalic acid Drugs 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- VLTRZXGMWDSKGL-UHFFFAOYSA-M perchlorate Inorganic materials [O-]Cl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-M 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 235000011056 potassium acetate Nutrition 0.000 description 1
- 235000015497 potassium bicarbonate Nutrition 0.000 description 1
- 229910000028 potassium bicarbonate Inorganic materials 0.000 description 1
- 239000011736 potassium bicarbonate Substances 0.000 description 1
- CHKVPAROMQMJNQ-UHFFFAOYSA-M potassium bisulfate Chemical compound [K+].OS([O-])(=O)=O CHKVPAROMQMJNQ-UHFFFAOYSA-M 0.000 description 1
- 229910000343 potassium bisulfate Inorganic materials 0.000 description 1
- 235000019396 potassium bromate Nutrition 0.000 description 1
- 229940094037 potassium bromate Drugs 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 235000011181 potassium carbonates Nutrition 0.000 description 1
- VKJKEPKFPUWCAS-UHFFFAOYSA-M potassium chlorate Chemical compound [K+].[O-]Cl(=O)=O VKJKEPKFPUWCAS-UHFFFAOYSA-M 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 239000011698 potassium fluoride Substances 0.000 description 1
- 235000003270 potassium fluoride Nutrition 0.000 description 1
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 1
- SATVIFGJTRRDQU-UHFFFAOYSA-N potassium hypochlorite Chemical compound [K+].Cl[O-] SATVIFGJTRRDQU-UHFFFAOYSA-N 0.000 description 1
- JLKDVMWYMMLWTI-UHFFFAOYSA-M potassium iodate Chemical compound [K+].[O-]I(=O)=O JLKDVMWYMMLWTI-UHFFFAOYSA-M 0.000 description 1
- 239000001230 potassium iodate Substances 0.000 description 1
- 235000006666 potassium iodate Nutrition 0.000 description 1
- 229940093930 potassium iodate Drugs 0.000 description 1
- 229910001487 potassium perchlorate Inorganic materials 0.000 description 1
- 239000012286 potassium permanganate Substances 0.000 description 1
- 229910000160 potassium phosphate Inorganic materials 0.000 description 1
- 235000011009 potassium phosphates Nutrition 0.000 description 1
- BHZRJJOHZFYXTO-UHFFFAOYSA-L potassium sulfite Chemical compound [K+].[K+].[O-]S([O-])=O BHZRJJOHZFYXTO-UHFFFAOYSA-L 0.000 description 1
- 235000019252 potassium sulphite Nutrition 0.000 description 1
- VISKNDGJUCDNMS-UHFFFAOYSA-M potassium;chlorite Chemical compound [K+].[O-]Cl=O VISKNDGJUCDNMS-UHFFFAOYSA-M 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229910052701 rubidium Inorganic materials 0.000 description 1
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- WBHQBSYUUJJSRZ-UHFFFAOYSA-M sodium bisulfate Chemical compound [Na+].OS([O-])(=O)=O WBHQBSYUUJJSRZ-UHFFFAOYSA-M 0.000 description 1
- 229910000342 sodium bisulfate Inorganic materials 0.000 description 1
- XUXNAKZDHHEHPC-UHFFFAOYSA-M sodium bromate Chemical compound [Na+].[O-]Br(=O)=O XUXNAKZDHHEHPC-UHFFFAOYSA-M 0.000 description 1
- UKLNMMHNWFDKNT-UHFFFAOYSA-M sodium chlorite Chemical compound [Na+].[O-]Cl=O UKLNMMHNWFDKNT-UHFFFAOYSA-M 0.000 description 1
- 229960002218 sodium chlorite Drugs 0.000 description 1
- 239000011775 sodium fluoride Substances 0.000 description 1
- 235000013024 sodium fluoride Nutrition 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 239000011697 sodium iodate Substances 0.000 description 1
- 235000015281 sodium iodate Nutrition 0.000 description 1
- 229940032753 sodium iodate Drugs 0.000 description 1
- 239000011684 sodium molybdate Substances 0.000 description 1
- 235000015393 sodium molybdate Nutrition 0.000 description 1
- TVXXNOYZHKPKGW-UHFFFAOYSA-N sodium molybdate (anhydrous) Chemical compound [Na+].[Na+].[O-][Mo]([O-])(=O)=O TVXXNOYZHKPKGW-UHFFFAOYSA-N 0.000 description 1
- 229960001922 sodium perborate Drugs 0.000 description 1
- 229940045872 sodium percarbonate Drugs 0.000 description 1
- BAZAXWOYCMUHIX-UHFFFAOYSA-M sodium perchlorate Chemical compound [Na+].[O-]Cl(=O)(=O)=O BAZAXWOYCMUHIX-UHFFFAOYSA-M 0.000 description 1
- 229910001488 sodium perchlorate Inorganic materials 0.000 description 1
- PFUVRDFDKPNGAV-UHFFFAOYSA-N sodium peroxide Chemical compound [Na+].[Na+].[O-][O-] PFUVRDFDKPNGAV-UHFFFAOYSA-N 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 235000011008 sodium phosphates Nutrition 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
- SPDUKHLMYVCLOA-UHFFFAOYSA-M sodium;ethaneperoxoate Chemical compound [Na+].CC(=O)O[O-] SPDUKHLMYVCLOA-UHFFFAOYSA-M 0.000 description 1
- CRWJEUDFKNYSBX-UHFFFAOYSA-N sodium;hypobromite Chemical group [Na+].Br[O-] CRWJEUDFKNYSBX-UHFFFAOYSA-N 0.000 description 1
- YKLJGMBLPUQQOI-UHFFFAOYSA-M sodium;oxidooxy(oxo)borane Chemical compound [Na+].[O-]OB=O YKLJGMBLPUQQOI-UHFFFAOYSA-M 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 229920001909 styrene-acrylic polymer Polymers 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-O sulfonium Chemical compound [SH3+] RWSOTUBLDIXVET-UHFFFAOYSA-O 0.000 description 1
- 150000003467 sulfuric acid derivatives 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
- WUUHFRRPHJEEKV-UHFFFAOYSA-N tripotassium borate Chemical compound [K+].[K+].[K+].[O-]B([O-])[O-] WUUHFRRPHJEEKV-UHFFFAOYSA-N 0.000 description 1
- BSVBQGMMJUBVOD-UHFFFAOYSA-N trisodium borate Chemical compound [Na+].[Na+].[Na+].[O-]B([O-])[O-] BSVBQGMMJUBVOD-UHFFFAOYSA-N 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- AQLJVWUFPCUVLO-UHFFFAOYSA-N urea hydrogen peroxide Chemical compound OO.NC(N)=O AQLJVWUFPCUVLO-UHFFFAOYSA-N 0.000 description 1
- 229910052984 zinc sulfide Inorganic materials 0.000 description 1
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 1
- 150000003754 zirconium Chemical class 0.000 description 1
- 229910052726 zirconium Inorganic materials 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
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/536—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning characterised by their form or by the form of their components, e.g. encapsulated material
-
- 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
- C09K8/70—Compositions for forming crevices or fractures characterised by their form or by the form of their components, e.g. foams
- C09K8/706—Encapsulated breakers
-
- 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
- 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
- C09K8/92—Compositions for stimulating production by acting on the underground formation characterised by their form or by the form of their components, e.g. encapsulated material
-
- 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
-
- 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
-
- 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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/26—Gel breakers other than bacteria or enzymes
Definitions
- the present invention relates to a capsule for reducing the viscosity of a fluid and a viscosity variable fluid using the capsule.
- shale gas has attracted attention as a new energy (see, for example, Non-Patent Document 1).
- This shale gas is a natural gas contained in the shale layer.
- shale gas is a so-called unconventional natural gas, it is difficult to recover shale gas from the ground.
- This hydraulic crushing method is a method of artificially destroying a reservoir rock in the vicinity of a well by pressurizing a crushing fluid filled in the well. Since a fracture occurs when the reservoir rock is broken, shale gas can be recovered through the crack.
- This fluid for crushing contains a plurality of granular substances (proppants) in order to prevent the cracks from closing after the fracture of the reservoir rock.
- the plurality of granular materials are sand particles and the like.
- the pressurized crushing fluid When a crack is generated, the pressurized crushing fluid enters the crack, so that a plurality of particulate substances contained in the crushing fluid also enter the crack. Thereby, even if pressurization of the crushing fluid is stopped, the crack is maintained as it is.
- the crushing fluid contains a viscosity reducing agent in order to recover the crushing fluid after the storage rock is destroyed.
- the viscosity of the crushing fluid is high before the reservoir rock breaks so that a plurality of particulate matter can easily enter the crack.
- the viscosity of the crushing fluid must be low after the reservoir rock is destroyed in order to make it easier to recover the crushing fluid filled inside the well after multiple granular materials enter the crack. Is desirable. Therefore, a thinning agent (breaker) having a function of reducing the viscosity of the crushing fluid (thickening function) is used.
- a thinning agent (capsule) having a capsule structure is used in order to exert a thinning function during use of the crushing fluid (see, for example, Patent Document 1).
- a material having a viscosity reducing function is coated with a coating film that decomposes using a hydrolysis reaction.
- This coating film contains poly (2-cyanoacrylate) and the like as a material that decomposes using a hydrolysis reaction.
- Ken Ihara “Impact of Shale Gas”, Analysis, 2011.5 Vol. 44 No. 3, pages 15 to 38, Internet ⁇ URL: http://oilgas-info.jogmec.go.jp/pdf/3/3574/201005#015a.pdf> Ken Ihara, “History and Impact of Hydraulic Fracturing Technology”, Analysis, 2011.5 Vol. 45 No. 3, 17-30 pages, Internet ⁇ URL: http://oilgas-info.jogmec.go.jp/pdf/4/4370/201105#017a.pdf>
- the present inventor as a result of earnest studies to achieve the above-described object, the present inventor, as a result of the capsule containing a central part and an outer part including a thinning material, the outer part contains a specific polymer compound, thereby I found out that the problem was solved.
- a capsule according to an embodiment of the present invention includes a central portion including a thinning material that reduces the viscosity of a fluid used in a hydraulic fracturing method, and an outer portion. It is equipped with.
- This outer part (1) covers the surface of the central part, (2) the central part can be gradually released in the fluid, and (3) a styrene-butadiene copolymer having a glass transition temperature of -20 ° C to 80 ° C. Including polymers.
- the viscosity variable fluid includes a fluid main body and one or more capsules.
- the capsule includes a central portion including a thinning material that reduces the viscosity, and an outer portion.
- This outer part (1) covers the surface of the central part, (2) the central part can be gradually released in the fluid, and (3) a styrene-butadiene copolymer having a glass transition temperature of -20 ° C to 80 ° C. Including polymers.
- the “capsule” is used in a state of being contained in a fluid (or a fluid having a variable viscosity).
- the “thinning material” contained in the central part means a material having a function of reducing the viscosity of the fluid containing the capsule.
- the central part can be gradually released in the fluid means that the central part (thinning material) can be gradually released into the fluid by utilizing some phenomenon in the fluid.
- the outer part gradually releases the central part not from the start of use of the capsule, but by exposing the central part after a certain period of time has elapsed since the start of use of the capsule. This is to demonstrate the function of the material.
- the type of phenomenon used for the outer portion to release the central portion is not particularly limited. For example, thermal expansion, melting, cracking, deformation due to heat, friction, pressure, contact with fluid, etc. , Cleavage, swelling, dissolution, dispersion in fluid, and the like.
- the type of “styrene butadiene copolymer” is not particularly limited as long as it has a glass transition temperature within the above-mentioned range. That is, the type of styrene butadiene copolymer may be only one type or two or more types. Moreover, the styrene butadiene copolymer may not be modified, and may be modified by one type or two or more types of functional groups.
- the surface of the central portion including the viscosity reducing material is coated with the outer portion including the styrene butadiene copolymer that satisfies the above-described conditions relating to the glass transition temperature. Therefore, an excellent viscosity reducing function can be exhibited.
- variable viscosity fluid includes one or more capsules.
- the surface of the central part including the viscosity reducing material is covered with the outer part including the styrene butadiene copolymer that satisfies the above-described conditions concerning the glass transition temperature.
- the outer part including the styrene butadiene copolymer that satisfies the above-described conditions concerning the glass transition temperature.
- Capsule 1-1 Capsule 1-1. Configuration 1-2. Function 1-3. Manufacturing method 1-4. Action and effect Capsule applications (variable viscosity fluid) 2-1. Configuration 2-2. Function 2-3. Action and effect
- Capsule> The capsule of one embodiment of the present invention will be described.
- the capsule described here is a thinning agent that exhibits a thinning function during use of the fluid, that is, a function of reducing the viscosity of the fluid when used in a state of being contained in the fluid.
- the capsule is dispersed in a fluid.
- the use of the capsule is not particularly limited as long as it is necessary to reduce the viscosity of the fluid during use for some reason.
- the use of the capsule is mainly determined according to the use of the fluid described above.
- the capsule is used, for example, in a hydraulic crushing method.
- the fluid used in this hydraulic crushing method is a so-called crushing fluid.
- FIG. 1 shows a cross-sectional configuration of a capsule according to an embodiment of the present invention.
- This capsule includes a central portion 1 and an outer portion 2. That is, the capsule has a structure (capsule structure) in which a main body (center part 1) that substantially exhibits a viscosity reducing function is accommodated inside a hollow structure (outer part 2).
- the shape of the capsule is not particularly limited, and is, for example, spherical, plate-like, or massive.
- FIG. 1 shows, for example, a case where the capsule has a spherical shape.
- the dimensions of the capsule are not particularly limited.
- the average particle diameter (volume average particle diameter) of the capsule is about 100 ⁇ m to 2000 ⁇ m.
- the central portion 1 is a so-called capsule core and includes any one type or two or more types of thinning materials.
- the “thinning material” is a material having a thinning function, and more specifically, a material that can exhibit a function of reducing the viscosity of a fluid containing a capsule.
- the outer portion 2 gradually releases the central portion 1 to release the central portion 1 (thinning material) into the fluid.
- the viscosity reducing material exhibits a viscosity reducing function.
- the thinning material may be a material that chemically reduces the viscosity of the fluid (chemically thinning material), or a material that reduces the viscosity of the fluid nonchemically (nonchemically thinning material). Or both.
- “Chemically reducing the viscosity of the fluid” means that the thinning material exhibits a thinning function by utilizing some chemical reaction between the thinning material and the fluid.
- the “chemical reaction” is, for example, one or more of a reaction in which a new substance is chemically formed and a reaction in which an existing substance is chemically decomposed. .
- the partner that reacts with the chemical thinning material is not particularly limited as long as it is any one or two or more of arbitrary components contained in the fluid. Details of this chemically thinning material will be described later.
- reducing the viscosity of the fluid non-chemically means that the thinning material exhibits a thinning function without using the above-described chemical reaction.
- the non-chemically thinning material is, for example, any one kind or two or more kinds of solvents for dilution.
- the fluid When the fluid is a liquid and the thinning material is a solvent for dilution, the fluid is diluted with the solvent by mixing the fluid and the solvent. Thereby, since the density
- the thinning material is preferably a chemical thinning material. This is because the efficiency of reducing the viscosity of the fluid is significantly higher than that of non-chemically thinning materials. Thereby, the viscosity of the fluid can be sufficiently reduced in a short time.
- the thinning material is any one kind or two kinds or more of the materials which decompose the thickener.
- the viscosity of the fluid is increased by utilizing the function of the thickener. Therefore, the viscosity reducing material decomposes part or all of the thickener to cause a chemical reaction. This is because the viscosity of the fluid is reduced by utilizing a simple reaction (decomposition reaction of the thickener).
- the chemical thinning material includes, for example, metal salts, metal oxides, nonmetal oxides, inorganic oxides, inorganic acids, inorganic acid salts, organic peroxides, organic acids, metal halides, metals Sulfides, enzymes and onium salts.
- the kind of the metal element contained as a constituent element in the specific example (metal salt or the like) of the above-described chemical viscosity reducing material is any one kind or two or more kinds of arbitrary metal elements, in particular It is not limited.
- the metal element is preferably any one of an alkali metal element and an alkaline earth metal element. This is because the chemical thinning material can be easily and stably obtained, and the chemical thinning material easily reduces the viscosity of the fluid.
- the type of alkali metal element is not particularly limited, and examples thereof include lithium (Li), sodium (Na), potassium (K), rubidium (Rb), and cesium (Cs).
- the type of the alkaline earth metal element is not particularly limited, and examples thereof include beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), and barium (Ba).
- the kind of onium ion contained as a constituent element in the specific example (onium salt) of the above-described chemical thinning material is particularly limited as long as it is any one kind or two or more kinds of arbitrary onium ions.
- This onium ion is, for example, an ammonium ion, a phosphonium ion, a sulfonium ion, or the like.
- the onium ion is preferably an ammonium ion. This is because the chemical thinning material can be easily and stably obtained, and the chemical thinning material easily reduces the viscosity of the fluid.
- the metal salt is a salt containing a metal element as a constituent element.
- the metal salt may be a reaction product (salt) of an arbitrary acid and an arbitrary basic metal compound, or may be a reaction product (salt) of an arbitrary base and an arbitrary acidic metal compound.
- the metal element is preferably one of an alkali metal element and an alkaline earth metal element
- the metal salt is one of an alkali metal salt and an alkaline earth metal salt. It is preferable that
- the metal salt is, for example, a metal peroxide salt, a persulfate metal salt, a perborate metal salt, a hypochlorite metal salt, a hypobromite metal salt, a chlorite metal salt, or a chlorate metal.
- Salt metal perchlorate, metal bromate, metal iodate, metal sulfate, metal percarbonate, metal carbonate, metal acetate, metal peracetate, metal hydroxide, metal permanganate Salts, metal molybdate, metal thiosulfate, metal sulfite, and ionic transition metal salts.
- Examples of the metal peroxide salt include sodium peroxide, calcium peroxide, and magnesium peroxide.
- Examples of the metal persulfate include sodium persulfate and potassium persulfate.
- the metal perborate is, for example, sodium perborate.
- Examples of the hypochlorite metal salt include sodium hypochlorite and potassium hypochlorite.
- An example of the metal hypobromite is sodium hypobromite.
- Examples of the chlorite metal salt include sodium chlorite and potassium chlorite.
- Examples of the chloric acid metal salt include sodium chlorate and potassium chlorate.
- Examples of the perchloric acid metal salt include sodium perchlorate and potassium perchlorate.
- Examples of the bromate metal salt include sodium bromate and potassium bromate.
- Examples of the iodate metal salt include sodium iodate, potassium iodate, and magnesium iodate.
- the metal sulfate salt is, for example, calcium sulfate.
- Examples of the metal percarbonate include sodium percarbonate and potassium percarbonate.
- Examples of the metal carbonate include sodium bicarbonate and potassium bicarbonate.
- Examples of the metal acetate include sodium acetate and potassium acetate.
- Examples of the peracetic acid metal salt include sodium peracetate and potassium peracetate.
- Examples of the metal hydroxide salt include sodium hydroxide, potassium hydroxide, and calcium hydroxide.
- Examples of the permanganate metal salt include sodium permanganate and potassium permanganate.
- Examples of the metal molybdate include sodium molybdate, lithium molybdate, and potassium molybdate.
- Examples of the metal thiosulfate include sodium thiosulfate and potassium thiosulfate.
- Examples of the metal sulfite include sodium sulfite and potassium sulfite.
- Examples of the ionic transition metal salt include ferrous sulfate, ferric sulfate, and zirconium salts.
- the metal salt is preferably one of an alkali metal salt and an alkaline earth metal salt, one of sodium persulfate and potassium persulfate is preferable.
- a metal oxide is an oxide containing a metal element as a constituent element.
- the metal element is preferably one of an alkali metal element and an alkaline earth metal element
- the metal oxide is, for example, an alkali metal oxide or an alkaline earth metal oxide. It is preferable that it is either.
- examples of the metal oxide include calcium oxide, barium oxide, titanium oxide, silicon oxide, and aluminum oxide.
- Non-metal oxides are oxides that do not contain a metal element as a constituent element, such as chlorine dioxide.
- the inorganic oxide is an inorganic oxide that does not contain a metal element as a constituent element, such as hydrogen peroxide.
- the inorganic acid is an inorganic acid that does not contain a metal element as a constituent element, and examples thereof include hydrochloric acid, sulfuric acid, phosphoric acid, and boric acid.
- An inorganic acid salt is a reaction product (salt) of an arbitrary inorganic acid and a basic metal compound that does not contain a metal element as a constituent element.
- the inorganic acid salt is, for example, zeolite, sodium phosphate, potassium phosphate, potassium chloride, sodium borate, potassium borate, sodium hydrogen sulfate, and potassium hydrogen sulfate.
- Organic peroxide is an organic peroxide that does not contain a metal element as a constituent element.
- the organic peroxide is, for example, carbamide peroxide, carbamate peroxide, peracetic acid, perbenzoic acid, or the like.
- Organic acid is an organic acid that does not contain a metal element as a constituent element.
- the organic acid is, for example, acetic acid, propionic acid, citric acid, formic acid, lactic acid, butyric acid, ascorbic acid, erythorbic acid, oxalic acid, malic acid, fumaric acid, benzoic acid and hydroquinone.
- the metal halide is a halide containing a metal element as a constituent element.
- the kind of halogen is not specifically limited, For example, they are any 1 type or 2 types or more in fluorine (F), chlorine (Cl), bromine (Br), iodine (I), etc.
- the metal halide is, for example, sodium fluoride, potassium fluoride, calcium fluoride, or the like.
- the metal sulfide is a sulfide containing a metal element as a constituent element.
- the metal sulfide is, for example, zinc sulfide, molybdenum sulfide, zirconium sulfide or the like.
- An enzyme is, for example, a protein molecule to which about 150 to 500 amino acids are bound, and specifically includes proteinases and peptidases.
- An onium salt is a salt containing an onium ion as a cation (cation), and more specifically, a reaction product (salt) of an arbitrary acid and an arbitrary basic onium compound.
- the onium ion is preferably an ammonium ion
- the onium salt is preferably an ammonium salt.
- examples of the onium salt include ammonium persulfate, ammonium sulfate, ammonium bicarbonate, ammonium acetate, ammonium molybdate, and ammonium fluoride.
- the onium salt is preferably an ammonium salt, ammonium persulfate or the like is preferable.
- the outer shell portion 2 is a so-called capsule shell and covers the surface of the central portion 1.
- the outer shell 2 may be a single layer or a multilayer.
- the average thickness of the outer shell 2 is not particularly limited, but is, for example, about 40 ⁇ m to 100 ⁇ m.
- the average thickness of the outer shell 2 may affect, for example, the sustained release speed of the outer shell 2 described later.
- the outer shell 2 covers the entire surface of the central portion 1 in order to accommodate the central portion 1 inside the hollow structure. That is, it is preferable that the central portion 1 is not exposed. Since the center 1 (thinning material) is released into the fluid after a specific period (the period required for the outer shell 2 to release the center 1 gradually) after the start of use of the capsule, This is because it is possible to intentionally and sufficiently delay the time when the thinning material substantially exhibits the thinning function. The reason for this is as follows.
- pre-use period a period until a specific period elapses after the start of use of the fluid is referred to as a “pre-use period”, and a period after the specific period elapses. This is referred to as “post-use period”.
- the “pre-use period” mainly means that the central portion 1 (thinning material) is covered with the outer shell 2 and the central portion 1 is not exposed, so that the thinning material is substantially thinned. This is a period during which the function cannot be performed.
- the “post-use period” means that the central portion 1 (thinning material) covered by the outer portion 2 is released into the fluid mainly due to the slow release of the central portion 1 by the outer portion 2. Therefore, this is a period during which the thinning material can substantially exhibit the thinning function.
- the viscosity is not decreased immediately from the start of use of the fluid (pre-use period), but after the start of use of the fluid, a specific period of time is It is desirable to reduce the viscosity of the fluid only when it has passed (after use period). This is because, for example, when a fluid containing a capsule is used in a hydraulic fracturing method (fracturing fluid), as described above, the fluid viscosity is maintained in an almost initial state during the previous use period. This is because it is required to substantially reduce the viscosity of the fluid during the subsequent use period.
- fracturing fluid hydraulic fracturing method
- the advantage based on the viscosity characteristics of the relatively high fluid can be utilized in the pre-use period, and the post-use Advantages based on relatively low fluid viscosity characteristics can be exploited in the time period.
- the central portion 1 when the entire surface of the central portion 1 is covered with the outer portion 2, the central portion 1 is not exposed when the fluid starts to be used. In this case, since the central portion 1 (thinning material) is still difficult to be released during the previous use period, the thinning material is less likely to exhibit a thinning function during the previous use period. Thereby, the viscosity of the fluid is maintained in an almost initial state during the previous use period, so that it is easy to utilize the advantage based on the high viscosity characteristics of the fluid during the previous use period.
- the central portion 1 is released into the fluid.
- This “specific condition” is, for example, one or more of temperature and time. The cause (principle) that the outer shell 2 gradually releases the central portion 2 will be described later.
- the central portion 1 thickness material
- the outer shell portion After a period of time required for 2 to release the central portion 1 gradually (post-use period), the viscosity reducing material exhibits a viscosity reducing function. As a result, the viscosity of the fluid is substantially reduced during the subsequent use period, so that the advantage based on the low viscosity characteristic of the fluid can be easily utilized during the subsequent use period.
- the outer shell 2 mainly has the following four properties.
- the outer portion 2 keeps protecting the central portion 1 within the previous use period. This is to prevent the thinning material from unintentionally exerting the thinning function by protecting the central portion 1 using the outer portion 2 during the previous use period.
- this fluid is not specifically limited, For example, any 1 type or 2 or more types of liquids, such as water and an organic solvent, are included.
- the outer portion 2 gradually and sufficiently releases the central portion 1 after a predetermined period has elapsed from the start of use of the fluid containing the capsule. This is because the thinning function of the thinning material is exhibited by intentionally exposing the central portion 1 during the subsequent use period.
- the sustained release rate and the like of the outer shell part 2 be easily controlled according to any one or two or more conditions of temperature and time. This is because the sustained release speed and the like of the outer shell part 2 are easily affected by temperature and time. Moreover, it is because it is easy to control the time when the viscosity reducing function of the viscosity reducing material is exhibited, that is, the time when the viscosity of the fluid decreases.
- the sustained release speed of the outer shell 2 may be influenced by the configuration of the outer shell 2 itself represented by the forming material and the average thickness, for example.
- the outer shell portion 2 is less likely to hinder the thinning function of the thinning material after the central portion 1 is released slowly. This is because, if the thinning function of the thinning material is hindered due to the outer portion 2 after the sustained release, the viscosity of the fluid is not easily reduced in the subsequent use period.
- the outer portion 2 contains a polymer compound that can gradually release the central portion 1 in a fluid containing a capsule.
- the outer shell 2 can release the central portion 1 in the fluid means that the central portion 1 can be gradually released into the fluid by utilizing some phenomenon in the fluid as described above. is doing. The outer portion 2 gradually releases the central portion 1 not from the start of use of the capsule, but by exposing the central portion 1 after a certain period of time has elapsed after the start of use of the capsule. This is because the function of the reduced viscosity material is exhibited.
- “Arbitrary external factors” are, for example, heat, friction, pressure, contact with a fluid (for example, water), and the like.
- “Arbitrary state change” includes thermal expansion, melting, cracking, deformation, cleavage, swelling, dissolution, dispersion in a fluid, and the like.
- the outer portion 2 includes a styrene-butadiene copolymer, which is a water-based emulsion type polymer compound, as a polymer compound that can gradually release the central portion 1 in the fluid.
- the glass transition temperature of the polymer is -20 ° C to 80 ° C, preferably -20 ° C to 50 ° C, more preferably -20 ° C to 30 ° C.
- the capsule (outer part 2) may be analyzed using, for example, differential thermal analysis (DTA).
- DTA differential thermal analysis
- styrene-butadiene copolymer having a glass transition temperature within the above-described range has excellent properties because the glass transition temperature is optimized in view of the above-described four properties.
- the “styrene butadiene copolymer” is a copolymer of styrene and 1,3-butadiene, and is so-called styrene butadiene rubber.
- the type of the styrene butadiene copolymer is not particularly limited as long as it has a glass transition temperature within the above range. Specifically, as long as the styrene butadiene copolymer has a glass transition temperature within the above-described range, the styrene butadiene copolymer may be of only one type or two or more types. Among these, it is preferable to use two or more types of styrene butadiene copolymers having different glass transition temperatures. This is because the styrene butadiene copolymer has more excellent properties in terms of the above four properties, and thus higher effects can be obtained.
- the styrene butadiene copolymer may not be modified, and may be modified with one or two or more kinds of functional groups, but among them, it is preferably modified. This is because the styrene butadiene copolymer has more excellent properties in terms of the above four properties, and thus higher effects can be obtained.
- the type of modification is not particularly limited, but among them, carboxy modification is preferable. This is because a higher effect can be obtained.
- the styrene butadiene copolymer has particularly excellent water resistance. For this reason, for example, when the capsule is used in a hydraulic crushing method (crushing fluid) or the like, the outer portion 2 is also in view of the first property described above even in a state where the capsule is contained in water. Excellent performance. That is, the outer portion 2 can sufficiently protect the central portion 1 even under water.
- the content (% by weight) of the outer part 2 in the capsule is not particularly limited, but is, for example, about 3% to 50% by weight. If the content of the outer portion 2 is smaller than 3% by weight, the outer portion 2 is too small with respect to the weight of the central portion 1, and therefore the covering property of the central portion 1 by the outer portion 2 may be insufficient. Because there is sex. On the other hand, if the content of the outer portion 2 is greater than 50% by weight, the outer portion 2 is too heavy relative to the weight of the central portion 1, so that the sustained release of the central portion 1 by the outer portion 2 is insufficient. Because there is a possibility of becoming.
- outer shell part 2 may further include any one kind or two or more kinds of other materials.
- FIG. 2 shows another cross-sectional configuration of the capsule and corresponds to FIG.
- the other material is, for example, any one or more of the plurality of granular substances 3. This is because, during the production of the capsule (formation of the outer shell 2), the granulation effect is improved and the aggregation of particles during the granulation is suppressed.
- the outer shell 2 includes a plurality of particulate substances 3, the plurality of particulate substances 3 are dispersed in the styrene-butadiene copolymer described above, and the plurality of particulate substances 3 are dispersed by the styrene-butadiene copolymer. A distributed state is maintained.
- the outer shell 2 includes other polymer compounds described later, the dispersed state of the plurality of particulate substances 3 is maintained by the other polymer compounds.
- the plurality of granular substances 3 are so-called fillers, and include any one kind or two or more kinds of inorganic materials, for example.
- the inorganic material include titanium oxide, silicon oxide, talc, mica, clay, bentonite, aluminum oxide, and zeolite. Among these, silicon oxide, talc and bentonite are preferable, and talc is more preferable. This is because capsules are less likely to aggregate.
- the plurality of particulate substances 3 are preferably dispersed in the outer shell 2, for example.
- the shape of the plurality of granular substances 3 is not particularly limited, and is, for example, one or more of spherical, plate-like, lump-like, needle-like, fibrous, and irregular shapes.
- FIG. 2 the case where the shape of the some granular material 3 is spherical, for example is shown.
- the average particle size (volume average particle size) of the plurality of granular materials 3 is not particularly limited, but is preferably smaller than the thickness of the outer shell 2 from the viewpoint of the granulation effect. Specifically, for example, when the average thickness of the outer shell 2 is about 40 ⁇ m to 100 ⁇ m, as a guide, the volume average particle diameter of the plurality of granular materials 3 is preferably about 0.1 ⁇ m to 20 ⁇ m.
- the content of the plurality of particulate substances 3 in the outer shell 2 is not particularly limited, but is preferably not excessively large. Specifically, the content of the plurality of particulate substances 3 in the outer portion 2 is, for example, about 10 wt% to 40 wt%, preferably about 15 wt% to 30 wt%. This is because if the content of the plurality of particulate substances 3 is too large, the sustained release rate of the outer shell 2 may be adversely affected.
- the other material is, for example, any one or more of other polymer compounds (excluding the styrene butadiene copolymer described above).
- Other polymer compounds include, for example, polyurethane, polyester, polyacrylate, polyvinyl alcohol, polystyrene, polybutadiene, cellulose, gelatin, an isocyanate adduct of polyol, and vinylidene chloride-methyl acrylate copolymer.
- other materials may be, for example, wax and dry oil.
- additives may be various additives, for example.
- This additive is, for example, a film forming aid for adjusting resin film formation.
- an additive is an antiblocking agent which has the function (antiblocking function) which suppresses aggregation of capsules.
- This capsule functions as follows by being used in the state contained in the fluid.
- the central part 1 (thinning material) is covered with the outer part 2.
- the thinning material since the thinning material is not released into the fluid, the thinning material still cannot exhibit the thinning function. As a result, the viscosity of the fluid is maintained substantially in the initial state (at the start of use of the fluid).
- how long the previous use period is any one of the use time and temperature of the fluid as described above, for example. It is determined according to the type or two or more types of conditions. This is because these conditions affect the sustained release rate of the outer shell 2 in the fluid.
- the outer portion 2 dissolves with time in the fluid, the outer portion 2 is not easily dissolved when the fluid usage time is short, but when the fluid usage time is increased, the outer portion 2 is sufficiently dissolved. Easier to dissolve.
- the solubility of the outer portion 2 changes according to the temperature of the fluid, for example, the outer portion 2 is not easily dissolved when the temperature of the fluid is low, but when the temperature of the fluid increases, Part 2 is sufficiently soluble.
- a central part 1 containing a thinning material and a coating solution used to form the outer part 2 are prepared.
- a coating solution for example, a latex of a styrene butadiene copolymer and a solvent are mixed, and then the mixture is stirred. Thereby, since a styrene butadiene copolymer is melt
- this solvent is not specifically limited, For example, it is any 1 type in water, alcohol, etc. or 2 types or more.
- content of the styrene butadiene copolymer in a coating solution can be set arbitrarily.
- the coating solution is dried.
- the outer part 2 containing a styrene butadiene copolymer is formed so that the surface of the center part 1 may be coat
- the plurality of granular substances 3 may be introduced into the coating solution. In this case, a plurality of granular materials 3 may be charged at once, or a plurality of granular materials 3 may be charged at a plurality of times.
- the formation method of the outer portion 2 is not particularly limited. Specifically, the method for supplying the coating solution is, for example, any one or two or more of a coating method and a spray method.
- the apparatus used for forming the outer shell 2 is not particularly limited.
- the apparatus is, for example, any one type or two or more types among a high speed mixer, spray drying, fluidized bed granulation coating apparatus, and the like.
- the fluidized bed granulation coating apparatus is preferably a rolling fluidized bed coating apparatus, a swirling fluidized bed coating apparatus, a Wurster type fluidized bed granulation coating apparatus, or the like.
- the rolling fluidized bed granulation coating apparatus uses a spray nozzle to flow the central portion 1 as a coating object in a spiral shape on the rotating plate inside the cylindrical rolling fluidized bed.
- 1 is a device for applying a coating solution to the surface of 1.
- the outer portion 2 is formed to have a uniform thickness. Secondly, since the coating amount is easily and accurately adjusted, the thickness of the outer shell 2 is strictly controlled. Thirdly, as the thickness of the outer shell portion 2 is strictly controlled, the size (average particle diameter and the like) of the capsule is also strictly controlled.
- the surface of the central portion 1 including the viscosity reducing material is coated with the outer portion 2 including the styrene butadiene copolymer having a glass transition temperature within the appropriate range described above. ing.
- the thinning material still has a thinning function. I can't show it.
- the viscosity of the fluid is maintained in the initial state, an advantage based on the high viscosity characteristic of the fluid is utilized.
- the reduced viscosity material is released into the fluid due to the sustained release of the central portion 1 by the outer portion 2, the reduced viscosity material exhibits a reduced viscosity function. This reduces the viscosity of the fluid, thereby taking advantage of the low viscosity characteristics of the fluid.
- the glass transition temperature of the styrene butadiene copolymer contained in the outer portion 2 is optimized in view of the four properties required for the outer portion 2, the styrene butadiene copolymer is It has properties superior to those of other polymer compounds.
- This “other polymer compound” is, for example, a styrene-butadiene copolymer that does not have a glass transition temperature within the above-described proper range.
- the “other polymer compound” is a polymer compound other than the styrene butadiene copolymer, such as polystyrene and polybutadiene.
- pre-use period of the fluid a period during which the viscosity of the fluid is maintained (pre-use period of the fluid) is sufficiently ensured, and the period is easily controlled. Further, after the above period has elapsed (after-use period of the fluid), the viscosity of the fluid is sufficiently reduced in a short time.
- the viscosity of the fluid is sufficiently reduced in a short time at a desired timing while using one kind of fluid. Therefore, an excellent viscosity reducing function can be exhibited with respect to fluids used for applications that require a reduction in viscosity during use.
- the styrene butadiene copolymer having a glass transition temperature within the above-described appropriate range is carboxy-modified
- the styrene butadiene copolymer in terms of the above four properties is used. Since the coalescence has more excellent properties, higher effects can be obtained.
- the thickener may be used during the use of the fluid if the central portion 1 contains a material that decomposes the thickener. Is decomposed, so that the viscosity of the fluid decreases. Therefore, an excellent viscosity reducing function can be exhibited for the same reason as that in the case where the central portion 1 includes the viscosity reducing material.
- the outer shell 2 contains a plurality of granular substances 3, the granulation effect is improved during the manufacture of the capsule (formation of the outer shell 2) and the aggregation of particles in the middle of granulation is suppressed. Dispersibility of the capsule in the inside is improved. Therefore, a higher effect can be obtained.
- the use of the capsule is not particularly limited as long as it is necessary to reduce the viscosity of the fluid during use of the fluid containing the capsule.
- variable viscosity fluid a fluid whose viscosity is reduced by using a capsule.
- This "viscosity variable fluid” is a fluid that can sufficiently reduce the viscosity during use in order to achieve a specific purpose.
- “Sufficiently reduce the viscosity” means that the advantage based on the relatively high fluid viscosity (advantage derived from high viscosity) can be utilized in the pre-use period (before the decrease in the viscosity of the fluid). In the period (after the decrease in the viscosity of the fluid), it means that the viscosity is sufficiently decreased to the extent that the advantage based on the relatively low fluid viscosity (the advantage derived from the low viscosity) can be utilized.
- the common (one kind) fluid is continuously used, but two kinds of advantages based on the viscosity characteristics of the fluids which are opposite to each other, that is, the advantage derived from high viscosity and Advantages derived from low viscosity can be utilized.
- FIG. 3 shows the configuration of the variable viscosity fluid in one embodiment of the present invention.
- the variable viscosity fluid includes a fluid body 11 and one or more capsules 12.
- the fluid main body 11 is a main component of the variable viscosity fluid, and the capsule 12 and other materials described later are dispersed or dissolved in the fluid 11 main body.
- the fluid main body 11 is, for example, a liquid. This is because the capsule 12 is easily dispersed in the fluid main body 11 and the dispersed state of the capsule 12 is easily maintained.
- This liquid contains, for example, one or more of water and organic solvents.
- the variable viscosity fluid is used in the hydraulic fracturing method (fracturing fluid)
- the liquid described above contains water.
- the capsule 12 has the same configuration as the capsule according to the embodiment of the present invention described above. That is, as shown in FIG. 1, the capsule 12 includes a central portion 1 including a viscosity reducing material and an outer portion 2 including a styrene butadiene copolymer having a glass transition temperature within an appropriate range. .
- the capsule 12 that serves as a viscosity reducing agent is called a breaker.
- a thinning material that essentially exhibits a thinning function may be referred to as a breaker.
- the capsule 12 is preferably dispersed in the fluid main body 11. This is because the viscosity of the variable viscosity fluid tends to decrease uniformly.
- the content of the capsule 12 in the fluid main body 11 is not particularly limited. The content of the capsule 12 can be arbitrarily set, for example, according to conditions such as the viscosity of the viscosity variable fluid in the subsequent use period.
- the viscosity variable fluid may further include any one kind or two or more kinds of other materials.
- FIG. 4 shows another configuration of the variable viscosity fluid, and corresponds to FIG.
- the other material is, for example, any one type or two or more types of a plurality of granular substances 13 (a plurality of second granular substances).
- the plurality of particulate substances 13 described here are different in concept from the plurality of particulate substances 3 (a plurality of first particulate substances) described above.
- the plurality of particulate substances 13 serve as proppants, unlike the plurality of particulate substances 3 that serve as fillers, as described below, for example.
- the plurality of particulate materials 3 are held in the outer shell 2 by a styrene butadiene copolymer.
- the plurality of particulate substances 13 are not held by the styrene butadiene copolymer in the outer shell 2 but are dispersed in the fluid main body 11.
- the plurality of particulate substances 13 include, for example, any one type or two or more types of sand, and the sand is covered with any one type or two or more types of polymer compounds. May be.
- the type of sand is not particularly limited as long as it is a rock fragment and a mineral fragment.
- the type of the polymer compound is not particularly limited as long as the surface of sand or the like can be sufficiently covered. There may be only one kind of the polymer compound, or two or more kinds.
- the plurality of particulate substances 13 are dispersed in the fluid main body 11. This is because the plurality of granular materials 13 are more likely to play the original role than when the plurality of granular materials 13 are aggregated and settled.
- the content of the plurality of particulate substances 13 in the fluid main body 11 is not particularly limited, but is determined according to, for example, the role (function), application, purpose, etc. of the viscosity variable fluid.
- the role of the plurality of particulate substances 13 is not particularly limited, but is determined according to, for example, the use and purpose of the viscosity variable fluid, as in the case of the content described above.
- the plurality of particulate substances 13 serve as so-called proppants. As described above, this proppant is used in order to prevent the crack generated when the storage rock is broken from being blocked.
- the plurality of particulate substances 13 are dispersed in the fluid main body 11 and the dispersed state of the plurality of particulate substances 13 is maintained. This is because the transportability of the plurality of particulate substances 13 is improved when the variable viscosity fluid is used.
- the viscosity variable fluid enters the inside of the crack
- the plurality of particulate substances 13 easily enter the fluid main body 11 together with the inside of the crack.
- the amount of the plurality of granular materials 13 that enter the inside of each crack is less likely to vary.
- the plurality of particulate substances 13 are not limited to proppant.
- the plurality of particulate substances 13 may be used for purposes different from proppants.
- the other material is, for example, any one type or two or more types of the thickener 14.
- the thickener 14 plays a role of increasing the viscosity of the viscosity variable fluid in the previous use period, and includes, for example, one or more of a gelling agent and a crosslinking agent.
- the gelling agent is, for example, any one or more of guar gum and carboxymethyl cellulose.
- a crosslinking agent is any one type in boric acid, a zirconium complex, etc., or 2 or more types, for example. When the viscosity variable fluid contains a gelling agent, for example, the viscosity variable fluid is gelled.
- content of the thickener 14 in the fluid main body 11 is not specifically limited.
- the content of the thickener 14 can be arbitrarily set according to conditions such as the viscosity of the viscosity variable fluid in the previous use period, for example.
- the thickener may be dissolved in the fluid main body 11, dispersed, or both.
- the viscosity of the variable viscosity fluid in the previous use period is substantially determined based on the viscosity of the fluid main body 11 itself.
- the viscosity of the viscosity variable fluid in the previous use period is sufficiently high. Therefore, when the viscosity of the variable viscosity fluid in the previous use period is not sufficiently high, it is preferable to increase the viscosity of the variable viscosity fluid in the previous use period by using the thickener 14. This is because the capsule 12 coating is less likely to aggregate and settle in the fluid main body 11 and the dispersion state of the capsule 12 and the like is easily maintained in the fluid main body 11.
- the other materials are any one or two or more of various additives.
- the additive include a friction reducing agent, a surfactant, a pH adjusting agent, a corrosion inhibitor, a biocide, and an iron control agent.
- the friction reducing agent mainly controls the fluidity of the plurality of particulate substances 13 in the variable viscosity fluid.
- This friction reducing agent contains, for example, any one or more of polyacrylamide and the like.
- the surfactant mainly controls the dispersibility and fluidity of the thinning material.
- This surfactant contains, for example, any one type or two or more types of alcohol-based surfactants and the like.
- the pH adjuster mainly adjusts the pH of the variable viscosity fluid.
- This pH adjuster contains, for example, any one or more of potassium carbonate and the like.
- Corrosion inhibitors mainly prevent corrosion of equipment and instruments that come into contact with the variable viscosity fluid when the variable viscosity fluid is used.
- This corrosion inhibitor contains, for example, any one or more of formaldehyde and isopropyl alcohol.
- the devices and instruments that come into contact with the variable viscosity fluid are, for example, pipes used to transport the variable viscosity fluid.
- Biocides mainly suppress the increase in the amount of microorganisms mixed in the variable viscosity fluid.
- This biocide contains, for example, any one or more of glutaraldehyde and hydrogen peroxide.
- Iron control agent mainly prevents precipitation of metal oxides caused by iron.
- the iron content control agent includes, for example, one or more of acetic acid, citric acid, ascorbic acid, ethylene glycol, and the like.
- variable viscosity fluid includes a capsule 12 having a configuration similar to that of the capsule of one embodiment of the present invention described above. Therefore, during the use of the variable viscosity fluid, the viscosity of the variable viscosity fluid decreases using the capsule 13.
- the viscosity of the viscosity-variable fluid is maintained in the initial state because the viscosity-reducing material still cannot exhibit the viscosity-reducing function.
- the viscosity of the variable viscosity fluid decreases because the viscosity reducing material exhibits a viscosity reducing function.
- one or more capsules 12 are included, and the capsule 12 has the same configuration as the capsule of one embodiment of the present invention described above. ing.
- the capsule 12 while using one type of variable viscosity fluid, the capsule 12 exhibits an excellent viscosity reducing function during the use of the variable viscosity fluid. It decreases sufficiently in a short time. Therefore, the viscosity change characteristic which was excellent using the viscosity reduction function of the capsule 12 can be obtained.
- variable viscosity fluid is used in the hydraulic fracturing method (fracturing fluid)
- the following effects can be obtained when the variable viscosity fluid includes a plurality of granular substances 13.
- variable viscosity fluid since the viscosity of the variable viscosity fluid is maintained in the initial state in the previous use period, the dispersed state of the plurality of particulate substances 13 is maintained in the variable viscosity fluid. Therefore, by pressurizing the variable viscosity fluid, the plurality of granular materials 13 can sufficiently enter the cracks generated when the reservoir rock is broken using the relatively high viscosity of the variable viscosity fluid.
- the viscosity of the variable viscosity fluid is sufficiently reduced, so that the fluidity of the variable viscosity fluid is improved. Therefore, by sucking the viscosity variable fluid, the used viscosity variable fluid can be collected in a short time using the viscosity of the relatively low viscosity variable fluid.
- variable viscosity fluid in order to allow the plurality of particulate substances 13 to sufficiently enter the cracks in the previous use period and to collect the used variable viscosity fluid in the subsequent use period in a short time ( It is only necessary to use one type of variable viscosity fluid. Therefore, the two types of advantages based on the viscosity characteristics of fluids that are opposite to each other can be easily and stably utilized.
- variable viscosity fluid Other actions and effects related to this variable viscosity fluid are the same as the actions and effects related to the capsule of one embodiment of the present invention.
- an aqueous emulsion solution containing the following series of polymer compounds was prepared.
- Experimental Example 8 Unmodified styrene butadiene copolymer manufactured by Nippon A & L Co., Ltd.
- aqueous emulsion solution is applied to the surface of the central portion 1, and then the aqueous emulsion solution is dried, whereby the outer portion 2 Formed.
- a rolling fluidized bed coating apparatus (LABO type manufactured by Freund Sangyo Co., Ltd.)
- an aqueous emulsion solution is applied to the surface of the central portion 1, and then the aqueous emulsion solution is dried, whereby the outer portion 2 Formed.
- the content (% by weight) of the outer portion 2 in the whole is equivalent to 80% of the predetermined content shown in Table 1.
- the central part 1 where the outer shell part 2 was formed was selected using a 1 mm sieve.
- the outer shell 2 including the polymer compound and the plurality of particulate substances 3 was formed so as to cover the surface of the central portion 1, thereby completing the capsule.
- the composition of the capsules produced here is as shown in Table 1.
- the elution amount of the central portion 1 (potassium persulfate and ammonium persulfate, which are thinning materials) and the electric conductivity of hot water.
- the elution amount was determined.
- the state of the capsule was evaluated based on the elution amount of the viscosity reducing material. In this case, the case where the elution amount of the viscosity reducing material was less than 10% was determined as “good”. On the other hand, the case where the elution amount of the thinning material was 10% or more was determined as “bad”.
- the outer portion 2 completely covered the surface of the central portion 1. A capsule structure could be formed. Moreover, since the outer portion 2 did not dissolve for a long time, the central portion 1 could be sufficiently protected using the outer portion 2.
- guar powder manufactured by SIGMA
- 1300 g of ion-exchanged water contained in a beaker while stirring the ion-exchanged water using a three-one motor.
- the guar powder was dissolved by adding. Since guar powder is difficult to dissolve, if there is a lump of undissolved guar powder in ion-exchanged water, crush the lump of guar powder with a spatula to remove the lump of undissolved guar powder. Was dissolved. Thereby, since the guar powder was dissolved, a guar solution was obtained.
- the capsule was poured into the guar solution, and then the guar solution was stirred. In addition, the amount of capsules was adjusted so that the weight of the central portion 1 was equivalent to 0.05 g.
- the effect of reducing the viscosity of the capsule was evaluated based on the measurement result of the viscosity of the guar solution.
- the case where the decrease rate of the viscosity with respect to the initial value (viscosity at the start of storage of the guar solution) was 10% or less even after 4 hours from the start of storage of the guar solution was designated as “A” Judged.
- the case where the decrease rate of the viscosity with respect to the initial value reached 10% or less after the elapse of 2 hours and before the elapse of 4 hours from the start of storage of the guar liquid was determined as “B”.
- the case where the rate of decrease in viscosity with respect to the initial value reached 10% 2 hours after the start of storage of the guar solution was determined as “C”.
- the time until the thinning effect is exhibited (pre-use period) and the rate of decrease in the viscosity of the guar liquid when the thinning effect is exhibited (post-use period) are somewhat dependent on the composition of the capsule. It fluctuated.
- the excellent viscosity reducing function was exhibited.
- the capsule and the variable viscosity fluid are not limited to the hydraulic crushing method (crushing fluid), and may be used for purposes other than the hydraulic crushing method. Even in this case, since the viscosity is sufficiently reduced in a short time during the use of the variable viscosity fluid containing the capsule, various effects can be obtained depending on the application.
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Abstract
Description
1.カプセル剤
1-1.構成
1-2.機能
1-3.製造方法
1-4.作用及び効果
2.カプセル剤の用途(粘度可変流体)
2-1.構成
2-2.機能
2-3.作用及び効果
本発明の一実施形態のカプセル剤に関して説明する。
まず、カプセル剤の構成に関して説明する。
中心部1は、いわゆるカプセル剤のコアであり、減粘材料のうちのいずれか1種類又は2種類以上を含んでいる。
外郭部2は、いわゆるカプセル剤のシェルであり、中心部1の表面を被覆している。この外郭部2は、単層でもよいし、多層でもよい。
なお、外郭部2は、更に、他の材料のうちのいずれか1種類又は2種類以上を含んでいてもよい。
このカプセル剤は、流体中に含まれた状態で使用されることにより、以下のように機能する。
上記したカプセル剤は、例えば、以下の手順により製造される。
本発明の一実施形態のカプセル剤によれば、ガラス転移温度が上記した適正な範囲内であるスチレンブタジエン共重合体を含む外郭部2により、減粘材料を含む中心部1の表面が被覆されている。
次に、上記したカプセル剤の用途に関して説明する。
図3は、本発明の一実施形態における粘度可変流体の構成を表している。この粘度可変流体は、流体本体11と、1又は2以上のカプセル剤12とを含んでいる。
流体本体11は、粘度可変流体の主要成分であり、カプセル剤12及び後述する他の材料は、流体11本体中において分散又は溶解されている。この流体本体11は、例えば、液体である。流体本体11中においてカプセル剤12が分散されやすいと共に、そのカプセル剤12の分散状態が維持されやすいからである。この液体は、例えば、水及び有機溶剤等のうちのいずれか1種類又は2種類以上を含んでいる。なお、例えば、粘度可変流体が水圧破砕法(破砕用流体)に用いられる場合には、上記した液体は、水を含んでいる。
カプセル剤12は、上記した本発明の一実施形態のカプセル剤と同様の構成を有している。即ち、カプセル剤12は、図1に示したように、減粘材料を含む中心部1と、ガラス転移温度が適正な範囲内であるスチレンブタジエン共重合体を含む外郭部2とを備えている。
なお、粘度可変流体は、更に、他の材料のうちのいずれか1種類又は2種類以上を含んでいてもよい。図4は、粘度可変流体の他の構成を表しており、図3に対応している。
他の材料は、例えば、複数の粒状物質13(複数の第2粒状物質)のうちのいずれか1種類又は2種類以上である。ここで説明する複数の粒状物質13は、上記した複数の粒状物質3(複数の第1粒状物質)とは異なる概念である。即ち、複数の粒状物質13は、例えば、以下で説明するように、フィラーとしての役割を果たす複数の粒状物質3とは異なり、プロパントとしての役割を果たす。より具体的には、複数の粒状物質3は、外郭部2中においてスチレンブタジエン共重合体により保持されている。これに対して、複数の粒状物質13は、外郭部2中においてスチレンブタジエン共重合体により保持されておらず、流体本体11中において分散されている。
また、他の材料は、例えば、増粘剤14のうちのいずれか1種類又は2種類以上である。この増粘剤14は、前使用期間における粘度可変流体の粘度を増加させる役割を果たしており、例えば、ゲル化剤及び架橋剤等のうちのいずれか1種類又は2種類以上を含んでいる。ゲル化剤は、例えば、グアガム及びカルボキシメチルセルロース等のうちのいずれか1種類又は2種類以上である。架橋剤は、例えば、ホウ酸及びジルコニウム錯体等のうちのいずれか1種類又は2種類以上である。粘度可変流体がゲル化剤を含んでいる場合には、例えば、その粘度可変流体はゲル化している。なお、流体本体11中における増粘剤14の含有量は、特に限定されない。この増粘剤14の含有量は、例えば、前使用期間における粘度可変流体の粘度等の条件に応じて、任意に設定可能である。この増粘剤は、流体本体11中において溶解されていてもよいし、分散されていてもよいし、双方でもよい。
また、他の材料は、各種添加剤のうちのいずれか1種類又は2種類以上である。この添加剤は、例えば、摩擦低減剤、界面活性剤、pH調整剤、腐食防止剤、殺生物剤及び鉄分制御剤等である。
この粘度可変流体は、上記した本発明の一実施形態のカプセル剤と同様の構成を有するカプセル剤12を含んでいる。よって、粘度可変流体の使用途中において、カプセル剤13を利用して粘度可変流体の粘度が減少する。
本発明の一実施形態の粘度可変流体によれば、1又は2以上のカプセル剤12を含んでおり、そのカプセル剤12が上記した本発明の一実施形態のカプセル剤と同様の構成を有している。この場合には、上記したように、1種類の粘度可変流体を用いていながら、その粘度可変流体の使用途中においてカプセル剤12が優れた減粘機能を発揮するため、その粘度可変流体の粘度が短時間で十分に減少する。よって、カプセル剤12の減粘機能を利用して、優れた粘度変化特性を得ることができる。
1.カプセル剤の製造
2.カプセル剤の評価
2-1.製造評価
2-2.性能評価
(実験例1~18)
まず、以下の手順により、カプセル剤を製造した。
実験例4~7,11~13:日本エイアンドエル株式会社製のカルボキシ変性スチレンブタジエン共重合体 ナルスターSR-107(Tg=-15℃)
実験例8:日本エイアンドエル株式会社製の未変性スチレンブタジエン共重合体 ナルスターSR-130(Tg=-1℃)
実験例9:日本エイアンドエル株式会社製のカルボキシ変性スチレンブタジエン共重合体 ナルスターSR-115(Tg=37℃)
実験例10:日本エイアンドエル株式会社製のカルボキシ変性スチレンブタジエン共重合体 ナルスターXG-4087(Tg=45℃)
実験例14:日本エイアンドエル株式会社製のカルボキシ変性スチレンブタジエン共重合体 ナルスターSR-107(Tg=-15℃)と日本エイアンドエル株式会社製のカルボキシ変性スチレンブタジエン共重合体 ナルスターSR-100(Tg=27℃)との混合物(混合比は重量比で1:1)
実験例15,16:日本エイアンドエル株式会社製のカルボキシ変性スチレンブタジエン共重合体 ナルスターSR-107(Tg=-15℃)と日本エイアンドエル株式会社製のカルボキシ変性スチレンブタジエン共重合体 ナルスターSR-115(Tg=37℃)との混合物(混合比は重量比で1:1)
実験例17:日本合成化学株式会社製のアクリル系樹脂 モビニール727(Tg=5℃)
実験例18:日本合成化学株式会社製のスチレンアクリル系共重合体 モビニール749E(Tg=25℃)
以下で説明するように、製造面及び性能面の双方からカプセル剤を評価した。
製造面からカプセル剤を評価するために、そのカプセル剤の被覆性及び耐水性を調べたところ、表1に示した結果が得られた。
性能面からカプセル剤を評価するために、そのカプセル剤の減粘機能(減粘効果)を調べたところ、表1に示した結果が得られた。ここでは、カプセル剤の減粘効果を簡易的に評価するために、そのカプセル剤が含まれたグア液の粘度変化を調べた。
Claims (9)
- 水圧破砕法に用いられる流体の粘度を減少させる減粘材料を含む中心部と、
(1)前記中心部の表面を被覆し、(2)前記流体中において前記中心部を徐放可能であり、(3)-20℃以上80℃以下のガラス転移温度を有するスチレンブタジエン共重合体を含む外郭部と
を備えた、カプセル剤。 - 前記スチレンブタジエン共重合体は、カルボキシ変性されている、
請求項1記載のカプセル剤。 - 前記外郭部は、更に、前記スチレンブタジエン共重合体により保持された複数の粒状物質を含む、
請求項1又は請求項2に記載のカプセル剤。 - 前記流体は、増粘剤を含み、
前記減粘材料は、前記増粘剤を分解する材料を含む、
請求項1ないし請求項3のいずれか1項に記載のカプセル剤。 - 流体本体と、
粘度を減少させる減粘材料を含む中心部と、(1)前記中心部の表面を被覆し、(2)前記流体中において前記中心部を徐放可能であり、(3)-20℃以上80℃以下のガラス転移温度を有するスチレンブタジエン共重合体を含む外郭部と、を備えた1又は2以上のカプセル剤と
を含む、粘度可変流体。 - 前記外郭部は、更に、前記スチレンブタジエン共重合体により保持された複数の第1粒状物質を含む、
請求項5記載の粘度可変流体。 - 更に、前記スチレンブタジエン共重合体により保持されていない複数の第2粒状物質を含む、
請求項5又は請求項6に記載の粘度可変流体。 - 更に、増粘剤を含み、
前記減粘材料は、前記増粘剤を分解する材料を含む、
請求項5ないし請求項7のいずれか1項に記載の粘度可変流体。 - 水圧破砕法に用いられる、
請求項5ないし請求項8のいずれか1項に記載の粘度可変流体。
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AU2016301584A AU2016301584B2 (en) | 2015-07-31 | 2016-07-29 | Capsule and viscosity-variable fluid |
CA2992023A CA2992023A1 (en) | 2015-07-31 | 2016-07-29 | Encapsulated agent and variable viscosity fluid |
US15/745,508 US20180208831A1 (en) | 2015-07-31 | 2016-07-29 | Encapsulated agent and variable viscosity fluid |
JP2017532581A JP6743018B2 (ja) | 2015-07-31 | 2016-07-29 | カプセル剤及び粘度可変流体 |
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PCT/JP2016/072381 WO2017022680A1 (ja) | 2015-07-31 | 2016-07-29 | カプセル剤及び粘度可変流体 |
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US (1) | US20180208831A1 (ja) |
JP (1) | JP6743018B2 (ja) |
AU (1) | AU2016301584B2 (ja) |
CA (1) | CA2992023A1 (ja) |
RU (1) | RU2723070C2 (ja) |
WO (1) | WO2017022680A1 (ja) |
Citations (5)
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WO1999061747A1 (en) * | 1998-05-29 | 1999-12-02 | 3M Innovative Properties Company | Encapsulated breakers, compositions and methods of use |
US20080009423A1 (en) * | 2005-01-31 | 2008-01-10 | Halliburton Energy Services, Inc. | Self-degrading fibers and associated methods of use and manufacture |
US20100307744A1 (en) * | 2009-06-03 | 2010-12-09 | Schlumberger Technology Corporation | Use of encapsulated chemical during fracturing |
JP2014141552A (ja) * | 2013-01-22 | 2014-08-07 | Sumitomo Bakelite Co Ltd | 樹脂組成物、注入剤および充填方法 |
JP5745705B2 (ja) * | 2013-06-10 | 2015-07-08 | 住友精化株式会社 | 水圧破砕法に用いられるフラクチャリング流体の粘度制御剤 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
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US543733A (en) * | 1895-07-30 | hirschfeld | ||
JPS5453118A (en) * | 1977-10-05 | 1979-04-26 | Nippon Kouatsu Electric Co | Low temperature fired* colored porcelain and method of making same |
US4506734A (en) * | 1983-09-07 | 1985-03-26 | The Standard Oil Company | Fracturing fluid breaker system which is activated by fracture closure |
US5437331A (en) * | 1994-08-24 | 1995-08-01 | The Western Company Of North America | Method for fracturing subterranean formations using controlled release breakers and compositions useful therein |
US6818594B1 (en) * | 1999-11-12 | 2004-11-16 | M-I L.L.C. | Method for the triggered release of polymer-degrading agents for oil field use |
US6767868B2 (en) * | 2001-02-22 | 2004-07-27 | Bj Services Company | Breaker system for fracturing fluids used in fracturing oil bearing formations |
US7135231B1 (en) * | 2003-07-01 | 2006-11-14 | Fairmont Minerals, Ltd. | Process for incremental coating of proppants for hydraulic fracturing and proppants produced therefrom |
GB2412389A (en) * | 2004-03-27 | 2005-09-28 | Cleansorb Ltd | Process for treating underground formations |
WO2012021373A1 (en) * | 2010-08-12 | 2012-02-16 | Conocophillips Company | Controlled release material |
-
2016
- 2016-07-29 CA CA2992023A patent/CA2992023A1/en not_active Abandoned
- 2016-07-29 JP JP2017532581A patent/JP6743018B2/ja not_active Expired - Fee Related
- 2016-07-29 US US15/745,508 patent/US20180208831A1/en not_active Abandoned
- 2016-07-29 WO PCT/JP2016/072381 patent/WO2017022680A1/ja active Application Filing
- 2016-07-29 AU AU2016301584A patent/AU2016301584B2/en not_active Ceased
- 2016-07-29 RU RU2018102599A patent/RU2723070C2/ru active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999061747A1 (en) * | 1998-05-29 | 1999-12-02 | 3M Innovative Properties Company | Encapsulated breakers, compositions and methods of use |
US20080009423A1 (en) * | 2005-01-31 | 2008-01-10 | Halliburton Energy Services, Inc. | Self-degrading fibers and associated methods of use and manufacture |
US20100307744A1 (en) * | 2009-06-03 | 2010-12-09 | Schlumberger Technology Corporation | Use of encapsulated chemical during fracturing |
JP2014141552A (ja) * | 2013-01-22 | 2014-08-07 | Sumitomo Bakelite Co Ltd | 樹脂組成物、注入剤および充填方法 |
JP5745705B2 (ja) * | 2013-06-10 | 2015-07-08 | 住友精化株式会社 | 水圧破砕法に用いられるフラクチャリング流体の粘度制御剤 |
Also Published As
Publication number | Publication date |
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US20180208831A1 (en) | 2018-07-26 |
CA2992023A1 (en) | 2017-02-09 |
AU2016301584A1 (en) | 2018-02-15 |
AU2016301584B2 (en) | 2020-12-24 |
JPWO2017022680A1 (ja) | 2018-07-12 |
JP6743018B2 (ja) | 2020-08-19 |
RU2018102599A3 (ja) | 2019-12-10 |
RU2723070C2 (ru) | 2020-06-08 |
RU2018102599A (ru) | 2019-07-25 |
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