CN105441058A - High-temperature-resistant low-concentration guar gum weighted fracturing fluid and application thereof - Google Patents
High-temperature-resistant low-concentration guar gum weighted fracturing fluid and application thereof Download PDFInfo
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- CN105441058A CN105441058A CN201510939306.8A CN201510939306A CN105441058A CN 105441058 A CN105441058 A CN 105441058A CN 201510939306 A CN201510939306 A CN 201510939306A CN 105441058 A CN105441058 A CN 105441058A
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- melon glue
- acid
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- mass
- guar gum
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- 239000012530 fluid Substances 0.000 title claims abstract description 129
- 229920002907 Guar gum Polymers 0.000 title claims abstract description 26
- 239000000665 guar gum Substances 0.000 title claims abstract description 26
- 229960002154 guar gum Drugs 0.000 title claims abstract description 26
- 235000010417 guar gum Nutrition 0.000 title claims abstract description 26
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims abstract description 101
- 235000010344 sodium nitrate Nutrition 0.000 claims abstract description 51
- 239000004317 sodium nitrate Substances 0.000 claims abstract description 50
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 76
- 239000003292 glue Substances 0.000 claims description 58
- 241000219112 Cucumis Species 0.000 claims description 55
- 235000015510 Cucumis melo subsp melo Nutrition 0.000 claims description 55
- FJJCIZWZNKZHII-UHFFFAOYSA-N [4,6-bis(cyanoamino)-1,3,5-triazin-2-yl]cyanamide Chemical compound N#CNC1=NC(NC#N)=NC(NC#N)=N1 FJJCIZWZNKZHII-UHFFFAOYSA-N 0.000 claims description 50
- -1 carboxymethyl melon Chemical compound 0.000 claims description 50
- 229940001516 sodium nitrate Drugs 0.000 claims description 49
- 239000000243 solution Substances 0.000 claims description 45
- 239000007864 aqueous solution Substances 0.000 claims description 44
- 150000003839 salts Chemical class 0.000 claims description 41
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 39
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 39
- 229910052726 zirconium Inorganic materials 0.000 claims description 32
- 239000000203 mixture Substances 0.000 claims description 23
- 239000012747 synergistic agent Substances 0.000 claims description 22
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 21
- 239000013522 chelant Substances 0.000 claims description 20
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 19
- 229920013818 hydroxypropyl guar gum Polymers 0.000 claims description 19
- PODWXQQNRWNDGD-UHFFFAOYSA-L sodium thiosulfate pentahydrate Chemical compound O.O.O.O.O.[Na+].[Na+].[O-]S([S-])(=O)=O PODWXQQNRWNDGD-UHFFFAOYSA-L 0.000 claims description 17
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 16
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 15
- 229910052796 boron Inorganic materials 0.000 claims description 15
- DBDNZCBRIPTLJF-UHFFFAOYSA-N boron(1-) monohydride Chemical compound [BH-] DBDNZCBRIPTLJF-UHFFFAOYSA-N 0.000 claims description 11
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 10
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 10
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 10
- 239000002253 acid Substances 0.000 claims description 10
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 150000001298 alcohols Chemical class 0.000 claims description 7
- 150000001299 aldehydes Chemical class 0.000 claims description 7
- 150000002923 oximes Chemical class 0.000 claims description 7
- BDAGIHXWWSANSR-UHFFFAOYSA-M Formate Chemical compound [O-]C=O BDAGIHXWWSANSR-UHFFFAOYSA-M 0.000 claims description 6
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 6
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 6
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims description 6
- 229960004418 trolamine Drugs 0.000 claims description 6
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 5
- 235000019253 formic acid Nutrition 0.000 claims description 5
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 5
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 5
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 claims description 4
- 150000002894 organic compounds Chemical class 0.000 claims description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 4
- 235000015320 potassium carbonate Nutrition 0.000 claims description 4
- QEOWFDYSNYCPRK-UHFFFAOYSA-N OCC[Na] Chemical compound OCC[Na] QEOWFDYSNYCPRK-UHFFFAOYSA-N 0.000 claims description 3
- 235000011187 glycerol Nutrition 0.000 claims description 3
- 235000013905 glycine and its sodium salt Nutrition 0.000 claims description 3
- 239000004310 lactic acid Substances 0.000 claims description 3
- 235000014655 lactic acid Nutrition 0.000 claims description 3
- MEIRRNXMZYDVDW-MQQKCMAXSA-N (2E,4E)-2,4-hexadien-1-ol Chemical compound C\C=C\C=C\CO MEIRRNXMZYDVDW-MQQKCMAXSA-N 0.000 claims description 2
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims description 2
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 2
- 229940061720 alpha hydroxy acid Drugs 0.000 claims description 2
- 150000001280 alpha hydroxy acids Chemical class 0.000 claims description 2
- 125000003277 amino group Chemical group 0.000 claims description 2
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 claims description 2
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 2
- 239000004247 glycine and its sodium salt Substances 0.000 claims description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 238000007670 refining Methods 0.000 claims description 2
- 229940029258 sodium glycinate Drugs 0.000 claims description 2
- 229940095064 tartrate Drugs 0.000 claims description 2
- 239000012266 salt solution Substances 0.000 abstract description 6
- 239000002562 thickening agent Substances 0.000 abstract description 3
- 239000006184 cosolvent Substances 0.000 abstract 1
- 239000003431 cross linking reagent Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 33
- 238000002360 preparation method Methods 0.000 description 23
- JHJLBTNAGRQEKS-UHFFFAOYSA-M sodium bromide Chemical compound [Na+].[Br-] JHJLBTNAGRQEKS-UHFFFAOYSA-M 0.000 description 20
- 239000000654 additive Substances 0.000 description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 239000002585 base Substances 0.000 description 13
- 238000003756 stirring Methods 0.000 description 12
- 230000000996 additive effect Effects 0.000 description 10
- 238000012360 testing method Methods 0.000 description 10
- 238000004132 cross linking Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 8
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 8
- 239000004971 Cross linker Substances 0.000 description 7
- DPDMMXDBJGCCQC-UHFFFAOYSA-N [Na].[Cl] Chemical compound [Na].[Cl] DPDMMXDBJGCCQC-UHFFFAOYSA-N 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 7
- 238000010276 construction Methods 0.000 description 7
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 6
- 230000006378 damage Effects 0.000 description 6
- 239000000839 emulsion Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- HLBBKKJFGFRGMU-UHFFFAOYSA-M sodium formate Chemical compound [Na+].[O-]C=O HLBBKKJFGFRGMU-UHFFFAOYSA-M 0.000 description 6
- 150000002500 ions Chemical class 0.000 description 5
- WFIZEGIEIOHZCP-UHFFFAOYSA-M potassium formate Chemical compound [K+].[O-]C=O WFIZEGIEIOHZCP-UHFFFAOYSA-M 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- 238000005086 pumping Methods 0.000 description 5
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 4
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical class [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 4
- 125000000129 anionic group Chemical group 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 4
- 150000001768 cations Chemical class 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- HGHPQUIZVKPZEU-UHFFFAOYSA-N boranylidynezirconium Chemical compound [B].[Zr] HGHPQUIZVKPZEU-UHFFFAOYSA-N 0.000 description 3
- 239000012267 brine Substances 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 238000001802 infusion Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 3
- 230000008719 thickening Effects 0.000 description 3
- 244000303965 Cyamopsis psoralioides Species 0.000 description 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 235000001484 Trigonella foenum graecum Nutrition 0.000 description 2
- 244000250129 Trigonella foenum graecum Species 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- ATZQZZAXOPPAAQ-UHFFFAOYSA-M caesium formate Chemical compound [Cs+].[O-]C=O ATZQZZAXOPPAAQ-UHFFFAOYSA-M 0.000 description 2
- NZSLBYVEIXCMBT-UHFFFAOYSA-N chloro hypochlorite;zirconium Chemical class [Zr].ClOCl NZSLBYVEIXCMBT-UHFFFAOYSA-N 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000013530 defoamer Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 229910017053 inorganic salt Inorganic materials 0.000 description 2
- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000001509 sodium citrate Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 229920001059 synthetic polymer Polymers 0.000 description 2
- 235000001019 trigonella foenum-graecum Nutrition 0.000 description 2
- HRXKRNGNAMMEHJ-UHFFFAOYSA-K trisodium citrate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O HRXKRNGNAMMEHJ-UHFFFAOYSA-K 0.000 description 2
- 229940038773 trisodium citrate Drugs 0.000 description 2
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- ZWAPSEBBXULIEX-UHFFFAOYSA-N C(C)(C)[Zr] Chemical compound C(C)(C)[Zr] ZWAPSEBBXULIEX-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 150000001638 boron Chemical class 0.000 description 1
- 150000001639 boron compounds Chemical class 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 239000007799 cork Substances 0.000 description 1
- COLRBPHEBSHUAG-UHFFFAOYSA-L disodium bromide chloride Chemical compound [Na+].[Na+].[Cl-].[Br-] COLRBPHEBSHUAG-UHFFFAOYSA-L 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- REYJJPSVUYRZGE-UHFFFAOYSA-O hydron;octadecan-1-amine Chemical compound CCCCCCCCCCCCCCCCCC[NH3+] REYJJPSVUYRZGE-UHFFFAOYSA-O 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 150000002902 organometallic compounds Chemical class 0.000 description 1
- CMOAHYOGLLEOGO-UHFFFAOYSA-N oxozirconium;dihydrochloride Chemical compound Cl.Cl.[Zr]=O CMOAHYOGLLEOGO-UHFFFAOYSA-N 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229940094035 potassium bromide Drugs 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 229940075581 sodium bromide Drugs 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 150000003608 titanium Chemical class 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- WRECIMRULFAWHA-UHFFFAOYSA-N trimethyl borate Chemical compound COB(OC)OC WRECIMRULFAWHA-UHFFFAOYSA-N 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 150000003754 zirconium Chemical class 0.000 description 1
- 150000003755 zirconium compounds Chemical class 0.000 description 1
- ZXAUZSQITFJWPS-UHFFFAOYSA-J zirconium(4+);disulfate Chemical compound [Zr+4].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZXAUZSQITFJWPS-UHFFFAOYSA-J 0.000 description 1
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
- C09K8/62—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
- C09K8/685—Compositions based on water or polar solvents containing organic compounds containing cross-linking agents
-
- 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
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/90—Compositions based on water or polar solvents containing organic compounds macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
- C09K8/905—Biopolymers
-
- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- Detergent Compositions (AREA)
Abstract
The invention provides a high-temperature-resistant low-concentration guar gum weighted fracturing fluid and application thereof. The high-temperature-resistant low-concentration guar gum weighted fracturing fluid at least comprises the following raw materials: 100 parts by volume of a salt solution containing sodium nitrate, 0.2-0.65 part by mass of guar gum and/or guar gum derivatives, 0.01-0.1 part by mass of a cosolvent, 1-2 parts by mass of a high-temperature synergist, 0.5-2 parts by mass of a pH value regulator and 0.2-1 part by mass of a cross-linking agent, wherein the parts by volume and the parts by mass are based on mL: g. The invention also provides application of the high-temperature-resistant low-concentration guar gum weighted fracturing fluid in high-temperature reservoir fracturing of deep wells and/or ultra-deep wells. The guar gum thickening agent in the fracturing fluid provided by the invention is low in use concentration and still has excellent temperature resistance, and the temperature resistance degree reaches 150 ℃ or even more than 160 ℃.
Description
Technical field
The present invention relates to a kind of resistant to elevated temperatures lower concentration melon glue weighted fracture fluid and application thereof, belong to the volume increase used additives technical field in field of petroleum exploitation.
Background technology
In oil and gas prospect performance history, hydraulic fracturing technology is the important technical of oil-gas field formation testing and exploitation.Along with increasing deep-well, strong well, heavily stressed well reservoir fracturing improvement, ubiquity the too high difficulty of operation pressure, reduces the success ratio of pressing crack construction.
There are three kinds of methods can reduce high operation pressure: one is use high voltage bearing well head and uphole equipment.At present, domestic deep layer fracturing is constructed the high voltage bearing equipment of common configuration.Two is use the configuration of heavy caliber tubing string to reduce of the fracturing fluid frictional resistance, but heavy caliber tubing string is usually by the restriction of hole structure, moreover adjust well body structure needs to improve drilling expense.Three is use weighted fracture fluid, namely improves of the fracturing fluid density, increases fluid column density, reduces wellhead pressure.This has following technology and economic advantages: (1), under existing high-tension apparatus condition, can reduce well head operation pressure further, ensures construction safety; (2) increase fluid column pressure, fracturing liquid increases the weight of to be the approach the most easily realized; (3) clay swelling in the favourable suppression reservoir of the high salinity of weighted fracture fluid.Therefore, fracturing liquid increases the weight of (namely improving of the fracturing fluid density) and has become the requisite measure reducing Fracturing Pressure.
The use of weighted fracture fluid technology in pressure break is existing for many years, although be more that some enterprises work reports pass on as technology, some use tricks of the trade to be solidified as some additive, but also have some correlative theses to publish, and also someone has applied for patent.Weighted fracture fluid can be divided into three classes by the weighting agent type used:
One class uses halogen weighting agent, such as Repone K, sodium-chlor, Sodium Bromide, Potassium Bromide and mixture each other.CN1869149A discloses a kind of weighted fracture fluid, working concentration be 0.4 ~ 0.7% hydroxypropylguar gum or fenugreek gum as viscosifying agent, Sodium Bromide, sodium-chlor or Potassium Bromide are as weighting agent, the concentration of salt solution is 26 ~ 50%, working concentration be 0.2 ~ 0.5% organic boron or organic zirconium as linking agent.
CN103911138A discloses a kind of density adjustable type compound weighted fracture fluid system, use hydroxypropylguar gum or code name for the one in APCF be viscosifying agent, weighting agent is the mixture of one or both any ratios in sodium-chlor, Repone K, Potassium Bromide, Sodium Bromide, and linking agent is one or more in organic boron class, organic zirconium class and organic titanium class.
CN104232059A discloses a kind of ultrahigh-temperature weighted fracture fluid and preparation method thereof, and viscosifying agent is Carboxymethyl hydroxypropyl guar, and weighting agent is any one in sodium-chlor or Sodium Bromide, and linking agent is organic zirconium crosslinker.The advantage of halogen weighted fracture fluid system is that density is at 1.05-1.60g/cm
3between adjustable, temperature resistant capability can reach 150 DEG C, can delay cross linking.
The people such as Cheng Xingsheng, Zhang Fuxiang are in magazine " oil drilling technology " (in March, 2011,33rd volume the 2nd phase, 91-93 page) deliver paper " low cost increases the weight of performance and the application of guar gum fracturing fluid ", describe and use SODIUMNITRATE to be 1.32g/cm as the density of weighting agent
3weighted fracture fluid, compared with bromine salt weighted fracture fluid, equal densities can save weighting agent cost 3000 yuan/m
3.
The people such as Yuan Xuefang, Liu Tongyi are in magazine " oilfield chemistry " (in September, 2013,30th volume the 3rd phase, 350-353 page) deliver paper " high temperature deep well non-crosslinked is without residue weighted fracture fluid performance study ", describe a kind of novel weighted fracture fluid, viscosifying agent used is a kind of low molecule hydrophobic association polyacrylamide, this system can heatproof 140 DEG C, along with the rising of brine density, system has significant salt thickening effect, viscosity just has when reaching more than 22mPas good takes grittiness energy, is less than 10% to the injury rate of supporting crack flow conductivity.
Equations of The Second Kind uses organic salt weighting agent, and organic salt used comprises potassium formiate, sodium formiate, cesium formate and Trisodium Citrate, or the mixture of organic salt and inorganic salt.CN102876314A discloses a kind of organic salt weighted fracture fluid system, and the viscosifying agent of use is hydroxypropylguar gum, and consumption is 0.5%, and weighting agent is potassium formiate, sodium formiate and cesium formate, and linking agent is organic borate.The feature of this organic salt weighted fracture fluid has wider Auto-regulating System of Density of Heavy Medium scope, at 1.05-2.3g/cm
3interior adjustable, there is lower Tc.The Tc of inorganic salt solution is generally at subzero more than 20 DEG C, and formate solution Tc can be low to moderate subzero 60 DEG C.Shortcoming is that organic formic acid salt is expensive, preparation density 1.55g/cm
3organic salt weighted fracture fluid, the working concentration of potassium formiate needs up to 74%, and extemporaneous preparation workload is large.
CN104178101A discloses a kind of weighted fracture fluid, and density is at 1.22-1.62g/cm
3between, claim most high-temperature resistant 200 DEG C.Wherein, super guar gum, hydroxypropylguar gum, Carboxymethyl hydroxypropyl guar or fenugreek gum can as viscosifying agents, consumption is 0.2 ~ 0.8%, the weighting agent used is the one in potassium formiate, sodium formiate, SODIUMNITRATE, or the mixture of sodium formiate and SODIUMNITRATE, or Sodium Bromide and SODIUMNITRATE, Potassium Bromide mixture, linking agent is organic boron or organic boron zirconium; According to claiming that the feature of this weighted fracture fluid is: (1) room temperature condition lower density reaches 1.62g/cm
3; (2) temperature resistant capability reaches 200 DEG C; (3) have the controllable delay cross linking time, crosslinking time is at 1min-10min; (4) there is lower frictional resistance; (5) cross-linking properties is good; (6) residue content is low, is 450mg/L; (7) leak-off is little, and leakoff coefficent is 1 × 10
-4m/min
1/2; (8) can by the combination of adjustment weighting agent and ratio, the density realized in certain density range is adjustable, to adapt to the needs of different reservoir.Shortcoming not easily breaks glue, and the high temperature corrosion of bromine salt is serious, toxic.
CN104263346A discloses a kind of acid weighted fracture fluid, and its use temperature is lower than 150 DEG C.Wherein, viscosifying agent used is synthetic polymer, be a kind of molecular weight is the acrylamide of 1,200 ten thousand and the multipolymer of 2-acrylamide-2-methyl propane sulfonic.Weighting agent used is at least one in Sodium Bromide, sodium-chlor, Repone K and Trisodium Citrate, and linking agent used is Resorcinol.The feature of this system is: (1), by nonmetallic ion linking agent crosslinked thickening agent in acid condition, is avoided inorganic metal or organometallic compound to be cross-linked in the basic conditions and inevitably introduced high volence metal ion to stratum and cause stratum secondary injury; (2) synthetic polymer is simple and easy to get, reduces viscosifying agent cost; (3) Low Damage, high temperature resistant, anti-shearing, easily broken glue and the feature such as residue content is low.Shortcoming is that thickener concentration is higher, and extemporaneous preparation churning time is long, and polymer-based carbon fluid viscosity height affects infusion discharge capacity.
CN103788937A discloses a kind of Low Damage seawater base weighted fracture fluid, uses the viscosifying agent containing carboxyl or phosphate groups in molecular structure, claim these two kinds of groups can with sodium ion complexing.Weighting agent is a kind of in sodium formiate or SODIUMNITRATE or their mixture, the most high-temperature resistant 140 DEG C of this system.
3rd class uses solid particulate as weighting agent.The people such as Tang Ruijiang are in magazine " oil drilling technology " (in March, 2015,37th volume the 2nd phase, 82-84 page) deliver paper " application of ultra-fine Low Damage weighted fracture fluid in area, first dam ", the weighting agent described in literary composition is the solid particulate of the size-grade distribution by adopting mixed solvent method to prepare in 20 ~ 40nm scope.Add 70g nanoparticle weighting agent in 100g base fluid after, density reaches 1.50g/cm
3, completely compatible with guar gum system, compatibleness is good, at 120 DEG C, 170s
-1viscosity 77.5mPas after shearing 120min, is less than 30% to core matrix damage rate.
In addition, CN103215028A discloses a kind of full suspension fracturing liquid and pressing crack construction method thereof, uses weighted brines and full suspension fracturing fluid gelatinizer preparation density 1.3 ~ 2.2g/cm
3fracturing liquid, be equivalent to high-density weighted fracture fluid, viscosifying agent used be 35 ~ 55% the two 16 ~ octadecyl ammonium or derivatives thereof of chlorodimethyl, the condensed phosphate class of 5 ~ 15%, the shielding fluid loss agent of 5 ~ 10% and 20 ~ 50% the mixture of water composition, but do not introduce the kind of weighted brines.
Although above-mentioned industry colleague has invented some weighted fracture fluid patents, delivered some papers, but still can not solve very well the ultra deep well that is greater than 7000 meters and (or) difficult problem that runs in the reservoir fracturing process of construction temperature more than 165 DEG C temperature.Reason is as follows:
(1) using melon glue as in the clear aqueous fracturing fluid formula of viscosifying agent, no matter be unmodified melon glue, the hydroxypropyl guar gum being also through modification, carboxymethyl melon glue, carboxy-methyl hydroxy propyl melon glue, the working concentration scope of melon glue normally 0.2 ~ 0.65% in fracturing liquid, this has become the common recognition of industry.More than 0.65%, such as 0.7%, prepared base fluid viscosity all can be caused excessive.Temperature is higher, and the working concentration of melon glue is higher, but can cause base fluid viscosity excessive (being greater than 120mPas) more than 0.7%, makes fracturing liquid pumping difficulties, is difficult to improve of the fracturing fluid discharge capacity.
(2) melon glue is as using fracturing fluid gelatinizer for many years, in the fracturing liquid of clear water preparation, have significant thickening function, electrolytically adds the apparent viscosity often continuing to increase salt solution, Here it is so-called salt thickening behavior.The concentration of salt is higher, and the base fluid viscosity prepared is larger.The electrolytical this performance limitations working concentration of melon glue.When high density salt solution, the working concentration of melon glue is difficult to more than 0.65%.Full-bodied base fluid is industrially nonsensical.
(3) salt that can improve fracturing liquid density of industrial significance is had to have sodium-chlor, Repone K, SODIUMNITRATE, Sodium Bromide, sodium formiate, potassium formiate.These salt are all monovalent salts, have high solubleness in water.A polyvalent salt is because of in the basic conditions can automatically cross-linked viscosifying agent and can not using.In these monovalent salts, Sodium Bromide is expensive; Formate working concentration is large, and use cost is high; Sodium-chlor and Repone K improve the limited in one's ability of brine density.Because having high cost performance, nearly ten years, SODIUMNITRATE is often used as of the fracturing fluid weighting agent, improves of the fracturing fluid density.
(4) along with ultra deep well, reservoir temperature is high often.In recent years, often run into formation temperature and be greater than 165 DEG C.Under this high-temperature condition, even if in the fracturing liquid of alkalescence, fracturing liquid can not be ignored the corrosion of tubing string.Sodium Bromide is at high temperature strong to the corrosive power of tubing string, and this is also that Sodium Bromide can not as the potential cause of high temperature weighted fracture fluid.Acidic fracturing fluid inherently has strong corrodibility, before not providing effective anticorrosion technique, does not generally use acid weighted fracture fluid.
(5) in fracturing liquid, the melon glue working concentration scope with industrial significance is limited in 0.2 ~ 0.65%.In this concentration range, above-mentioned document does not tell in the fracturing liquid of high density salt solution, how to make of the fracturing fluid heat resistance reach more than 165 DEG C in fact.What often see is data and the elaboration that some melon glue working concentrations are greater than the fracturing liquid heat resistance of 0.65%, even can be resistance to 180 DEG C, and data disclosed in these do not have industrial significance because previous reasons only has laboratory meaning.
(6) the resistant to elevated temperatures key of weighted fracture fluid is by the fracturing liquid formula comprising linking agent and form.In fracturing liquid formula, linking agent and supporting synergistic agent are the key compositions of formula.It is organic borate cross-linker or organic zirconium crosslinker that above-mentioned document just censures the linking agent used general, does not indicate and uses which kind of organic borate cross-linker, which kind of organic zirconium crosslinker, and how to obtain these organic borate cross-linkers or organic zirconium crosslinker.
Therefore, high temperature deep well pressure break and use weighted fracture fluid still face some new challenges.First, because reservoir buries deeply, reservoir temperature is high, proposes higher requirement to fracturing liquid technical feature.Under normal working concentration, the performance of existing guar gum fracturing fluid can only be resistance to 150 DEG C, even if melon gum concentration brings up to 0.7%, the of the fracturing fluid heat resistance of gained is also difficult to breakthrough 165 DEG C.Secondly, existing guar gum fracturing fluid rate of crosslinking is too fast, can not meet the requirement of deep-well, ultra-deep well fracturing.Existing guar gum fracturing fluid rate of crosslinking is often as short as 0.5 ~ 3 minute, and present deep-well, ultra deep well often wish that crosslinking time controls more than 5 minutes, greatly can reduce friction drag during fracturing liquid high speed infusion like this.Its three, the bromine salt weighted fracture fluid based on Sodium Bromide had and formate are too high for main weighted fracture fluid cost, limit promoting the use of of bromine salt weighted fracture fluid and formate weighted fracture fluid; Villaumite (sodium-chlor, Repone K) the weighted fracture fluid efficiency had is low, and the brine density prepared is no more than 1.15, can not meet the needs of ultra-deep well fracturing; What had is main weighted fracture fluid with SODIUMNITRATE heat resistance still needs further raising.
Summary of the invention
For solving the problems of the technologies described above, the object of the present invention is to provide a kind of resistant to elevated temperatures lower concentration melon glue weighted fracture fluid and application thereof.The present invention adopts SODIUMNITRATE to increase the density of fracturing liquid base fluid, within the scope of melon glue 0.2% ~ 0.65% and/or the working concentration of guar gum derivative, by using the additives such as linking agent, high temperature synergistic agent and pH value regulator, a kind of resistant to elevated temperatures lower concentration melon glue weighted fracture fluid can be formed.
For achieving the above object, the present invention provide firstly a kind of resistant to elevated temperatures lower concentration melon glue weighted fracture fluid, its raw material composition at least comprises: containing salts solution 100 parts by volume of SODIUMNITRATE, melon glue and/or guar gum derivative 0.2 ~ 0.65 mass parts, solubility promoter 0.01 ~ 0.1 mass parts, high temperature synergistic agent 1 ~ 2 mass parts, pH value regulator 0.5 ~ 2 mass parts, linking agent 0.2 ~ 1 mass parts, be wherein using mL:g as benchmark between parts by volume and mass parts.
It should be noted that, according to long-term practice, formed one in this area and measured custom especially.That is, be used for the metering of the water of preparing fracturing fluid or salts solution in units of volume, the additive in fracturing liquid then measures with mass parts relative to the volume of water or salts solution, and in salts solution, each substances content still measures with mass concentration.
In the present invention, the working concentration of SODIUMNITRATE is limited under the normal temperature saturation ratio of SODIUMNITRATE.Therefore, with the total amount of the salts solution containing SODIUMNITRATE, the working concentration scope of SODIUMNITRATE is 0.0001% ~ 45% (mass concentration).Preferably, be 9% ~ 41% containing the mass concentration of SODIUMNITRATE in the salts solution of SODIUMNITRATE, be more preferably 10% ~ 40%.Mass concentration is low and do not have application value owing to promoting the density capability of water lower than the salts solution containing SODIUMNITRATE of 9%; Mass concentration is lower due to the activity of wherein water higher than the salts solution containing SODIUMNITRATE of 41%, is difficult to dissolve melon glue.Therefore, above-mentioned preferred concentration range makes it have more industrial significance.By changing the concentration of SODIUMNITRATE, normal temperature density can be obtained at 1.1 ~ 1.35g/cm
3the adjustable salts solution containing SODIUMNITRATE.Can should be adopt local water preparation containing salts solution of SODIUMNITRATE, therefore, namely the salt in this solution refer to the salts substances in local water, do not limit their content, there is certain difference according to the difference in region.
In weighted fracture fluid of the present invention, the viscosifying agent used is melon glue and/or guar gum derivative.Preferably, described melon glue and/or guar gum derivative comprise the combination of one or more in refining former powder melon glue, hydroxypropyl guar gum, carboxymethyl melon glue and carboxy-methyl hydroxy propyl melon glue etc.These melon glue can be all the melon glue of oil production industry technical grade.In the present invention, the working concentration of melon glue and/or guar gum derivative is limited in 0.2% ~ 0.65% (w/v), when mainly considering that deep-well, ultra-deep well fracturing are constructed, the base fluid (being greater than 120mPas) of too high viscosity is unfavorable for the imbibition of pressure break pump truck and increases fracturing liquid pumping frictional resistance, bootlessly consumes the kinetic energy of limited fracturing truck pump group.Preferably, to contain the salts solution of SODIUMNITRATE described in 100 parts by volume for benchmark, the usage quantity of described melon glue and/or guar gum derivative is 0.3 ~ 0.55 mass parts (being wherein using mL:g as benchmark between parts by volume and mass parts).
Also comprise solubility promoter in weighted fracture fluid of the present invention, its function is that viscosifying agent is dissolved quickly in containing the salts solution of SODIUMNITRATE.Solubility promoter in the present invention can be acidic substance, and any do not have the influential material that can reduce pH value in water to use to crosslinked function.Preferably, described solubility promoter comprises the combination of one or more in formic acid, acetic acid, hydrochloric acid, thionamic acid, sulfuric acid and citric acid etc.Conveniently use, described solubility promoter can use in form of an aqueous solutions.That is, described solubility promoter comprises the aqueous solution of one or more in formic acid, acetic acid, hydrochloric acid, thionamic acid, sulfuric acid and citric acid etc.The mass concentration of this aqueous solution can be 5% ~ 40% (according to two or more acid, then with their summation calculating concentration).Or, described solubility promoter also can comprise the combination of one or more in aqueous formic acid, acetic acid aqueous solution, aqueous hydrochloric acid, aqueous sulfamic acid, aqueous sulfuric acid and aqueous citric acid solution etc., and the mass concentration of these aqueous solution can be all 5% ~ 40%.The usage quantity of solubility promoter 0.01 ~ 0.1 mass parts that the present invention is above-mentioned can be with the Mass Calculation of the described aqueous solution.
In weighted fracture fluid of the present invention, preferably, the high temperature synergistic agent used comprises the mixture containing Sulfothiorine.Contriver studies discovery, is used alone Sulfothiorine, and the temperature tolerance of guar gum fracturing fluid can only be made to be increased to 150 DEG C.Under higher temperature, Sulfothiorine then loses high temperature synergistic function.Contriver also finds that some organic compound have synergy function to Sulfothiorine, is used by their mixtures, like a cork the temperature tolerance of guar gum fracturing fluid can be increased to more than 150 DEG C as high temperature synergistic agent together with other additives such as linking agent of the present invention.Therefore, more preferably, described high temperature synergistic agent comprises the mixture of the combination of one or more in Sulfothiorine and short-chain alcohols, short chain aldehydes, oxime, carboxylate salt and the alcohol amine compound containing amino and hydroxyl etc.Wherein, described short-chain alcohols, short chain aldehydes, oxime, carboxylate salt and the alcohol amine compound containing amino and hydroxyl can be such as trolamine, methyl alcohol, formaldehyde, formate, benzoate etc.Conveniently use, described high temperature synergistic agent can use in form of an aqueous solutions.That is, described high temperature synergistic agent comprises the aqueous solution of the mixture of the combination of one or more in Sulfothiorine and short-chain alcohols, short chain aldehydes, oxime, carboxylate salt and the alcohol amine compound containing amino and hydroxyl etc.In this aqueous solution, the mass concentration of Sulfothiorine can be 5% ~ 20%.The mass concentration of the combination of one or more in short-chain alcohols in this aqueous solution, short chain aldehydes, oxime, carboxylate salt and the alcohol amine compound containing amino and hydroxyl etc. can be 5% ~ 30%.The usage quantity of high temperature synergistic agent 1 ~ 2 mass parts that the present invention is above-mentioned can be with the Mass Calculation of the described aqueous solution.
Also comprise pH value regulator in weighted fracture fluid of the present invention, its function ensures that of the fracturing fluid potential of hydrogen is at more than pH10.Preferably, described pH value regulator comprises the combination of one or more in sodium hydroxide, potassium hydroxide, sodium carbonate and salt of wormwood etc.Conveniently use, described pH value regulator can use in form of an aqueous solutions.That is, described pH value regulator comprises the aqueous solution of one or more in sodium hydroxide, potassium hydroxide, sodium carbonate and salt of wormwood etc.The mass concentration of this aqueous solution can be 5% ~ 40% (according to two or more alkali, then with their summation calculating concentration).Or described pH value regulator comprises the combination of one or more in aqueous sodium hydroxide solution, potassium hydroxide aqueous solution, aqueous sodium carbonate and wet chemical etc., and the mass concentration of these aqueous solution can be all 5% ~ 40%.The usage quantity of pH value regulator 0.5 ~ 2 mass parts that the present invention is above-mentioned can be with the Mass Calculation of the described aqueous solution.
In weighted fracture fluid of the present invention, preferably, the linking agent used comprises the inorganic double salt compound of zirconium cation chelate and the formation of boron anion inner complex.The structure of this inorganic double salt compound can as shown in structural formula (1).More preferably, the part (L namely in structural formula (1) of zirconium cation chelate and boron anion inner complex is formed
1 ~ 5) be can form the organic compound containing more function group of five-ring or six-ring with boron and/or zirconium, comprise the combination of one or more in substituted or unsubstituted alpha hydroxy acid, substituted or unsubstituted a-amino acid, substituted or unsubstituted many alkylol cpds and alcohol amine compound etc.Particularly preferably, described part comprises lactic acid, tartrate, citric acid, oxyacetic acid, Padil, N-(2-hydroxyethyl) imino-one acetic acid (HOCH
2cH
2nHCH
2cOOH), N, the combination of one or more in N-bis-(2-hydroxyethyl) Padil, double hydroxyethyl Sodium Glycinate, glycerine, ethylene glycol, sorbyl alcohol, Sunmorl N 60S, Monoethanolamine MEA BASF, diethanolamine and trolamine etc., they can form water miscible inner complex with boron and/or zirconium.The part forming inner complex with boron or zirconium can be all identical, also can part identical.Proportionlity between zirconium chelate positively charged ion and Boron chelate complexes negatively charged ion can change, x, y in structural formula (1) might not be integers, can be mark, but meet the stoichiometric relation of charge balance, counterion show in structural formula (1).
structural formula (1)
The inorganic double salt compound that this zirconium cation chelate and boron anion inner complex are formed can be prepared by following steps: (1) is selected suitable part and provided the parent compound of zirconium, makes them generate zirconium cation chelate; (2) select suitable part and the parent compound that boron is provided, make their generate boron anion Boron chelate complexes; (3) by zirconium cation chelate and the mixing of boron anion inner complex, just can obtain boron zirconium chelate, the inorganic double salt compound that namely described zirconium cation chelate and boron anion inner complex are formed, also can be described as boron zirconium crosslink agent in the present invention.
Boron, zirconium compounds that the parent compound of zirconium and the parent compound of boron all can be commonly used for this area.Such as, usually use zirconium oxychloride, zirconium sulfate as the parent compound of zirconium; Some organic compound such as four trolamine zirconiums, tetra-n-butyl zirconium, tetra isopropyl zirconium also can use, but cost of material is more expensive.Usual use boric acid, borax are as the parent compound of boron; Other boron compound, such as trimethyl borate, trolamine boron also can use, but cost of material is more expensive.
Conveniently use, linking agent of the present invention can use in form of an aqueous solutions.That is, described linking agent comprises the aqueous solution of the inorganic double salt compound of zirconium cation chelate and the formation of boron anion inner complex.The mass concentration of this aqueous solution can be 20% ~ 30% (i.e. the concentration of described inorganic double salt compound).The usage quantity of linking agent 0.2 ~ 1 mass parts that the present invention is above-mentioned can be with the Mass Calculation of the described aqueous solution.
In weighted fracture fluid of the present invention, except containing above-mentioned additive, additive conventional in some aqueous fracturing fluids can also be comprised, such as, in stablizer (comprising clay stabilizer), emulsion splitter, cleanup additive, gel breaker etc. one or more.Under normal circumstances, these additives are not the key affecting fracturing liquid heat resistance, those skilled in the art can optionally add these additives according to environment for use and object, their consumptions can carry out conventional adjustment by those skilled in the art, and the concrete material that these additives adopt all can for this area routine.Such as, the salts solution of SODIUMNITRATE is contained for benchmark with 100 parts by volume, of the fracturing fluid raw material composition of the present invention can also comprise the combination of one or more in gel breaker 0.001-0.5 mass parts, emulsion splitter 0.001-1 mass parts, sterilant 0.0001-1 mass parts, defoamer 0.0001-2 mass parts, stablizer 0.001-2 mass parts, broken promoter for rubber 0.0001-0.5 mass parts, cleanup additive 0.0001-2 mass parts etc., is wherein using mL:g as benchmark between parts by volume and mass parts.
Resistant to elevated temperatures lower concentration melon glue weighted fracture fluid provided by the invention can be prepared by the preparation method of the aqueous fracturing fluid of this area routine, such as, mixed by each raw material.Specifically, solubility promoter, viscosifying agent melon glue and/or guar gum derivative can be mixed with the salts solution containing SODIUMNITRATE, then add other additives except linking agent (and selectively gel breaker, broken promoter for rubber etc.) (comprising high temperature synergistic agent, pH value regulator and selectively stablizer, cleanup additive, sterilant, defoamer, emulsion splitter etc.), obtain weighted fracture fluid base fluid; Linking agent (and selectively gel breaker, broken promoter for rubber etc.) is added again in fracturing process.
On the other hand, the present invention also provides the application of above-mentioned resistant to elevated temperatures lower concentration melon glue weighted fracture fluid in the temperature reservoirs pressure break of deep-well and/or ultra deep well.
In above-mentioned application, preferably, the temperature of described temperature reservoirs is more than 150 DEG C, is more preferably more than 165 DEG C.
In sum, the present invention adopts SODIUMNITRATE to increase the density of fracturing liquid base fluid, within the scope of melon glue 0.2% ~ 0.65% and/or the working concentration of guar gum derivative, by using the additives such as linking agent, high temperature synergistic agent and pH value regulator, a kind of resistant to elevated temperatures lower concentration melon glue weighted fracture fluid can be formed.This weighted fracture fluid is applicable to the temperature reservoirs of deep-well and/or ultra deep well; In this fracturing liquid, the working concentration of melon glue class viscosifying agent is low, greatly reduces of the fracturing fluid pumping frictional resistance, is conducive to the pressing crack construction of deep-well, ultra deep well; And this fracturing liquid is under the working concentration of lower melon glue class viscosifying agent, still have excellent heat resistance, heatproof degree reaches 150 DEG C even more than 160 DEG C.
Embodiment
In order to there be understanding clearly to technical characteristic of the present invention, object and beneficial effect, existing following detailed description is carried out to technical scheme of the present invention, but can not be interpreted as to of the present invention can the restriction of practical range.
Embodiment 1 is containing the preparation of the salts solution of 40% SODIUMNITRATE
Take 600 grams of industrial sodium nitrates, measure 900mL Tarim Basin carat 2 local water, all join in 2000mL beaker, stir, until SODIUMNITRATE is all dissolved, form the salts solution of the SODIUMNITRATE containing mass concentration 40%, its density is at room temperature 1.32 ~ 1.34g/cm
3.
The preparation of embodiment 2 high temperature synergistic agent
Be the formalin of 37% by 650 grams of water, 150 grams of Sulfothiorine and 200 gram mass concentration, after stirring, obtain the aqueous solution of a homogeneous transparent, be described high temperature synergistic agent, it can significantly improve the heat resistance of SODIUMNITRATE weighted fracture fluid.
The preparation of embodiment 3pH value conditioning agent
Sodium hydroxide is mixed with the aqueous solution that mass concentration is 10%, is described pH value regulator, it can be used for changing the potential of hydrogen of SODIUMNITRATE weighted fracture fluid, to obtain best high temperature resistant frozen glue.
The preparation of embodiment 4 positively charged ion zirconium chelate A
In 500mL three-necked flask, adding 300 gram mass concentration is the aqueous glycerin solution of 20%, adds 20 grams of double hydroxyethyl Sodium Glycinates and 30 grams of zirconium oxychlorides successively, be warming up to 80 DEG C after mixing under stirring.Being incubated after 4 hours, being cooled to room temperature, is 7 ~ 8 with the aqueous sodium hydroxide solution adjust pH that mass concentration is 10%, obtains the aqueous solution of the cation zirconium chelate A of pale yellow transparent.
The preparation of embodiment 5 positively charged ion zirconium chelate B
In 1000mL tri-neck round-bottomed flask, add 500 grams of water, 100 grams of ethylene glycol, 50 grams of trolamines and 25 gram of 88% lactic acid, after stirring, add 20 grams of zirconium oxychlorides gradually.Continuing stirring under room temperature after 1 hour, is 7 ~ 9 with the ammoniacal liquor adjust pH that mass concentration is 28%, obtains the aqueous solution of the cation zirconium chelate B of yellow transparent.
The preparation of embodiment 6 anionic boron inner complex
In 1000mL tri-neck round-bottomed flask, adding 400 grams of water, 190 grams of Sunmorl N 60Ss, 100 grams of boric acid, after stirring, is 7 ~ 9 with strong aqua adjust pH, obtains the subdiaphanous transparent aqueous solution containing anionic boron inner complex of outward appearance.
The preparation of embodiment 7 linking agent
Take the aqueous solution containing anionic boron inner complex in the aqueous solution of the cation zirconium chelate A in 100 grams of embodiments 4 and 50 grams of embodiments 6, after mixing, obtain the inorganic double salt compound water solution of zirconium cation chelate A and the formation of boron anion inner complex, be described linking agent.
The preparation of embodiment 8 linking agent
Take the aqueous solution containing anionic boron inner complex in the aqueous solution of the cation zirconium chelate B in 100 grams of embodiments 5 and 50 grams of embodiments 6, after mixing, obtain the inorganic double salt compound water solution of zirconium cation chelate B and the formation of boron anion inner complex, be described linking agent.
The preparation of embodiment 9 SODIUMNITRATE weighted fracture fluid and performance thereof
This of the fracturing fluid raw material composition comprises: salts solution 100 parts by volume of the SODIUMNITRATE containing mass concentration 40% in embodiment 1, solubility promoter (namely, mass concentration is the aqueous citric acid solution of 40%) 0.05 mass parts, hydroxypropyl guar gum (HPG) 0.3 mass parts, high temperature synergistic agent in embodiment 2 (namely, the aqueous solution containing the Sulfothiorine of mass concentration 15%) 1 mass parts, pH value regulator in embodiment 3 (namely, mass concentration is the aqueous sodium hydroxide solution of 10%) 1 mass parts, linking agent 0.55 mass parts in embodiment 7, wherein using mL:g as benchmark between parts by volume and mass parts.
This of the fracturing fluid preparation method can be: by the salts solution of the SODIUMNITRATE containing mass concentration 40% in embodiment 1, join and be provided with in the jar of high speed agitator, then solubility promoter (that is, mass concentration is the aqueous citric acid solution of 40%) is added; Under stirring, add hydroxypropyl guar gum, keep stirring after 30 minutes, add high temperature synergistic agent in embodiment 2 successively (namely, the aqueous solution containing the Sulfothiorine of mass concentration 15%), pH value regulator in embodiment 3 (namely, mass concentration is the aqueous sodium hydroxide solution of 10%), stir, obtain SODIUMNITRATE weighted fracture fluid base fluid; Then add the linking agent in embodiment 7, obtain described SODIUMNITRATE weighted fracture fluid.
Test the of the fracturing fluid heat resistance of the present embodiment, the fracturing liquid carrying out testing is the fracturing liquid not adding gel breaker and propping agent.Test result is: this fracturing liquid at 135 DEG C, 2 hours, 170S
-1under, viscosity is 200mPas.And the prior art reaching this parameter index needs the HPG of melon gum concentration at least 0.4% (w/v), that is the present invention can by reducing the working concentration of melon glue, greatly reduce of the fracturing fluid pumping frictional resistance, be conducive to the pressing crack construction of deep-well, ultra deep well.
The preparation of embodiment 10 SODIUMNITRATE weighted fracture fluid and performance thereof
This of the fracturing fluid raw material composition comprises: salts solution 100 parts by volume of the SODIUMNITRATE containing mass concentration 40% in embodiment 1, solubility promoter (namely, mass concentration is the aqueous citric acid solution of 40%) 0.05 mass parts, hydroxypropyl guar gum (HPG) 0.5 mass parts, high temperature synergistic agent in embodiment 2 (namely, the aqueous solution containing the Sulfothiorine of mass concentration 15%) 1 mass parts, pH value regulator in embodiment 3 (namely, mass concentration is the aqueous sodium hydroxide solution of 10%) 1.5 mass parts, linking agent 0.5 mass parts in embodiment 7, wherein using mL:g as benchmark between parts by volume and mass parts.
This of the fracturing fluid preparation method is identical with embodiment 9.
Test the of the fracturing fluid heat resistance of the present embodiment, the fracturing liquid carrying out testing is the fracturing liquid not adding gel breaker and propping agent.Test result is: this fracturing liquid at 165 DEG C, 2 hours, 170S
-1under, viscosity is 150mPas.Even and if the prior art melon gum concentration reaching this parameter index is the HPG of 0.7% (w/v), its of the fracturing fluid temperature tolerance is also no more than 150 DEG C, that is use crosslinking technological of the present invention, the heat resistance of weighted fracture fluid can be made easily more than 150 DEG C.
The preparation of embodiment 11 SODIUMNITRATE weighted fracture fluid and performance thereof
This of the fracturing fluid raw material composition comprises: salts solution 100 parts by volume of the SODIUMNITRATE containing mass concentration 40% in embodiment 1, solubility promoter (namely, mass concentration is the aqueous citric acid solution of 40%) 0.05 mass parts, hydroxypropyl guar gum (HPG) 0.55 mass parts, high temperature synergistic agent in embodiment 2 (namely, the aqueous solution containing the Sulfothiorine of mass concentration 15%) 1.5 mass parts, pH value regulator in embodiment 3 (namely, mass concentration is the aqueous sodium hydroxide solution of 10%) 1.8 mass parts, linking agent 0.5 mass parts in embodiment 7, wherein using mL:g as benchmark between parts by volume and mass parts.
This of the fracturing fluid preparation method is identical with embodiment 9.
Test the of the fracturing fluid heat resistance of the present embodiment, the fracturing liquid carrying out testing is the fracturing liquid not adding gel breaker and propping agent.Test result is: this fracturing liquid at 175 DEG C, 2 hours, 170S
-1under, viscosity is 150mPas, illustrates that this heavy cracking-fluid formula has excellent resistance to elevated temperatures, can be used for the temperature reservoirs pressure break of deep-well, ultra deep well.
The application of embodiment 12 SODIUMNITRATE weighted fracture fluid
This of the fracturing fluid raw material composition comprises: salts solution 100 parts by volume of the SODIUMNITRATE containing mass concentration 40% in embodiment 1, solubility promoter (namely, mass concentration is the aqueous citric acid solution of 40%) 0.05 mass parts, hydroxypropyl guar gum (HPG) 0.5 mass parts, high temperature synergistic agent in embodiment 2 (namely, the aqueous solution containing the Sulfothiorine of mass concentration 15%) 1.5 mass parts, pH value regulator in embodiment 3 (namely, mass concentration is the aqueous sodium hydroxide solution of 10%) 1.5 mass parts, linking agent 0.5 mass parts in embodiment 7, cleanup additive (the FACM-41 cleanup additive of Langfang company of Wanke of oil branch) 0.5 mass parts, emulsion splitter (the FACM-42 emulsion splitter of Langfang company of Wanke of oil branch) 0.5 mass parts, gel breaker (the FACM-40 capsule breaker of Langfang company of Wanke of oil branch) 0.01 mass parts, wherein using mL:g as benchmark between parts by volume and mass parts.
This of the fracturing fluid preparation method can be: by the salts solution of the SODIUMNITRATE containing mass concentration 40% in embodiment 1, join and be provided with in the jar of high speed agitator, then solubility promoter (that is, mass concentration is the aqueous citric acid solution of 40%) is added; Under stirring, add hydroxypropyl guar gum, keep stirring after 30 minutes, add high temperature synergistic agent in embodiment 2 successively (namely, the aqueous solution containing the Sulfothiorine of mass concentration 15%), pH value regulator in embodiment 3 (namely, mass concentration is the aqueous sodium hydroxide solution of 10%) and cleanup additive, emulsion splitter, stir, obtain SODIUMNITRATE weighted fracture fluid base fluid;
In fracturing process, described in infusion during SODIUMNITRATE weighted fracture fluid base fluid, by truck-mounted blender mouth, add the propping agent of linking agent in embodiment 7 and gel breaker and needs respectively, formed containing sand frozen glue fluid.The temperature reservoirs of deep-well and/or ultra deep well should be applicable to containing sand frozen glue fluid; Wherein the working concentration of melon glue class viscosifying agent is low, greatly reduces of the fracturing fluid pumping frictional resistance, is conducive to the pressing crack construction of deep-well, ultra deep well; And under the working concentration of lower melon glue class viscosifying agent, still there is excellent heat resistance.
Claims (10)
1. a resistant to elevated temperatures lower concentration melon glue weighted fracture fluid, its raw material composition at least comprises: containing salts solution 100 parts by volume of SODIUMNITRATE, melon glue and/or guar gum derivative 0.2 ~ 0.65 mass parts, solubility promoter 0.01 ~ 0.1 mass parts, high temperature synergistic agent 1 ~ 2 mass parts, pH value regulator 0.5 ~ 2 mass parts, linking agent 0.2 ~ 1 mass parts, be wherein using mL:g as benchmark between parts by volume and mass parts.
2. resistant to elevated temperatures lower concentration melon glue weighted fracture fluid according to claim 1, wherein, described is 0.0001% ~ 45% containing the mass concentration of SODIUMNITRATE in the salts solution of SODIUMNITRATE, is preferably 9% ~ 41%, is more preferably 10% ~ 40%.
3. resistant to elevated temperatures lower concentration melon glue weighted fracture fluid according to claim 1, wherein, described melon glue and/or guar gum derivative comprise the combination of one or more in refining former powder melon glue, hydroxypropyl guar gum, carboxymethyl melon glue and carboxy-methyl hydroxy propyl melon glue; To contain the salts solution of SODIUMNITRATE described in 100 parts by volume for benchmark, the usage quantity of described melon glue and/or guar gum derivative is 0.3 ~ 0.55 mass parts.
4. resistant to elevated temperatures lower concentration melon glue weighted fracture fluid according to claim 1, wherein, described solubility promoter comprises the combination of one or more in formic acid, acetic acid, hydrochloric acid, thionamic acid, sulfuric acid and citric acid; Preferably, described solubility promoter comprises the aqueous solution of one or more in formic acid, acetic acid, hydrochloric acid, thionamic acid, sulfuric acid and citric acid, and the mass concentration of this aqueous solution is 5% ~ 40%.
5. resistant to elevated temperatures lower concentration melon glue weighted fracture fluid according to claim 1, wherein, described high temperature synergistic agent comprises Sulfothiorine and short-chain alcohols, short chain aldehydes, oxime, carboxylate salt and the mixture containing the combination of one or more in the alcohol amine compound of amino and hydroxyl; Preferably, described high temperature synergistic agent comprises the aqueous solution of the mixture of the combination of one or more in Sulfothiorine and short-chain alcohols, short chain aldehydes, oxime, carboxylate salt and alcohol amine compound, and in this aqueous solution, the mass concentration of Sulfothiorine is 5% ~ 20%; More preferably, described short-chain alcohols, short chain aldehydes, oxime, carboxylate salt and alcohol amine compound comprise the combination of one or more in trolamine, methyl alcohol, formaldehyde, formate and benzoate.
6. resistant to elevated temperatures lower concentration melon glue weighted fracture fluid according to claim 1, wherein, described pH value regulator comprises the combination of one or more in sodium hydroxide, potassium hydroxide, sodium carbonate and salt of wormwood; Preferably, described pH value regulator comprises the aqueous solution of one or more in sodium hydroxide, potassium hydroxide, sodium carbonate and salt of wormwood, and the mass concentration of this aqueous solution is 5% ~ 40%.
7. resistant to elevated temperatures lower concentration melon glue weighted fracture fluid according to claim 1, wherein, described linking agent comprises the inorganic double salt compound of zirconium cation chelate and the formation of boron anion inner complex; Preferably, described linking agent comprises the aqueous solution of the inorganic double salt compound of zirconium cation chelate and the formation of boron anion inner complex, and the mass concentration of this aqueous solution is 20% ~ 30%.
8. resistant to elevated temperatures lower concentration melon glue weighted fracture fluid according to claim 7, wherein, the part forming zirconium cation chelate and boron anion inner complex can form the organic compound containing more function group of five-ring or six-ring with boron and/or zirconium, comprises the combination of one or more in substituted or unsubstituted alpha hydroxy acid, substituted or unsubstituted a-amino acid, substituted or unsubstituted many alkylol cpds and alcohol amine compound; Preferably, described part comprises the combination of one or more in lactic acid, tartrate, citric acid, oxyacetic acid, Padil, N-(2-hydroxyethyl) imino-one acetic acid, N, N-bis-(2-hydroxyethyl) Padil, double hydroxyethyl Sodium Glycinate, glycerine, ethylene glycol, sorbyl alcohol, Sunmorl N 60S, Monoethanolamine MEA BASF, diethanolamine and trolamine.
9. the application of the resistant to elevated temperatures lower concentration melon glue weighted fracture fluid described in any one of claim 1-8 in the temperature reservoirs pressure break of deep-well and/or ultra deep well.
10. application according to claim 9, wherein, the temperature of described temperature reservoirs is more than 150 DEG C.
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