CN113337267A - Application of biological enzyme gel breaker in high-salinity water-based fracturing fluid product and fracturing fluid product - Google Patents
Application of biological enzyme gel breaker in high-salinity water-based fracturing fluid product and fracturing fluid product Download PDFInfo
- Publication number
- CN113337267A CN113337267A CN202110604038.XA CN202110604038A CN113337267A CN 113337267 A CN113337267 A CN 113337267A CN 202110604038 A CN202110604038 A CN 202110604038A CN 113337267 A CN113337267 A CN 113337267A
- Authority
- CN
- China
- Prior art keywords
- fracturing fluid
- fluid product
- gel breaking
- fracturing
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 105
- 108090000790 Enzymes Proteins 0.000 title claims abstract description 55
- 102000004190 Enzymes Human genes 0.000 title claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 45
- 241000193744 Bacillus amyloliquefaciens Species 0.000 claims abstract description 15
- 229920002907 Guar gum Polymers 0.000 claims abstract description 14
- 239000000665 guar gum Substances 0.000 claims abstract description 14
- 229960002154 guar gum Drugs 0.000 claims abstract description 14
- 235000010417 guar gum Nutrition 0.000 claims abstract description 14
- 238000004321 preservation Methods 0.000 claims abstract description 12
- 108010055059 beta-Mannosidase Proteins 0.000 claims abstract description 10
- 239000002562 thickening agent Substances 0.000 claims description 23
- 230000000844 anti-bacterial effect Effects 0.000 claims description 17
- 239000000654 additive Substances 0.000 claims description 15
- 230000000996 additive effect Effects 0.000 claims description 15
- 239000004927 clay Substances 0.000 claims description 15
- 239000003899 bactericide agent Substances 0.000 claims description 14
- 239000003381 stabilizer Substances 0.000 claims description 14
- 239000003139 biocide Substances 0.000 claims description 13
- 230000003115 biocidal effect Effects 0.000 claims description 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 9
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 8
- 239000003002 pH adjusting agent Substances 0.000 claims description 8
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 7
- 239000011734 sodium Substances 0.000 claims description 7
- 229910052708 sodium Inorganic materials 0.000 claims description 7
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- -1 hydroxypropyl Chemical group 0.000 claims description 6
- 150000003839 salts Chemical class 0.000 claims description 6
- 244000007835 Cyamopsis tetragonoloba Species 0.000 claims description 5
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 5
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 4
- 150000002191 fatty alcohols Chemical class 0.000 claims description 4
- 150000004714 phosphonium salts Chemical group 0.000 claims description 4
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 4
- 239000004094 surface-active agent Substances 0.000 claims description 4
- HMDFOXQIYPYCRX-UHFFFAOYSA-N 1-(2-chloropropan-2-yl)-2-dodecylbenzene Chemical compound CCCCCCCCCCCCC1=CC=CC=C1C(C)(C)Cl HMDFOXQIYPYCRX-UHFFFAOYSA-N 0.000 claims description 3
- GZOWLNNGTRYBDH-UHFFFAOYSA-N 2,3,4,5-tetrafluoro-6-(1,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,9-heptadecafluoronon-1-enoxy)benzenesulfonic acid Chemical compound FC=1C(=C(C(=C(C=1F)F)F)S(=O)(=O)O)OC(=C(C(C(C(C(C(C(C(F)(F)F)(F)F)(F)F)(F)F)(F)F)(F)F)(F)F)F)F GZOWLNNGTRYBDH-UHFFFAOYSA-N 0.000 claims description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 3
- 229920006317 cationic polymer Polymers 0.000 claims description 3
- 239000003093 cationic surfactant Substances 0.000 claims description 3
- JRBPAEWTRLWTQC-UHFFFAOYSA-N dodecylamine Chemical group CCCCCCCCCCCCN JRBPAEWTRLWTQC-UHFFFAOYSA-N 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- DUIOKRXOKLLURE-UHFFFAOYSA-N 2-octylphenol Chemical compound CCCCCCCCC1=CC=CC=C1O DUIOKRXOKLLURE-UHFFFAOYSA-N 0.000 claims description 2
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 2
- 239000012528 membrane Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 18
- 239000000126 substance Substances 0.000 abstract description 10
- 238000010276 construction Methods 0.000 abstract description 8
- 239000004576 sand Substances 0.000 abstract description 4
- 230000006872 improvement Effects 0.000 abstract description 3
- 239000000499 gel Substances 0.000 description 82
- 230000033558 biomineral tissue development Effects 0.000 description 17
- 238000000034 method Methods 0.000 description 17
- 239000013535 sea water Substances 0.000 description 17
- 239000003921 oil Substances 0.000 description 14
- 239000007788 liquid Substances 0.000 description 13
- 239000000243 solution Substances 0.000 description 11
- 230000003111 delayed effect Effects 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 8
- 238000002156 mixing Methods 0.000 description 8
- 239000005011 phenolic resin Substances 0.000 description 8
- 239000013505 freshwater Substances 0.000 description 7
- 238000003756 stirring Methods 0.000 description 7
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000011161 development Methods 0.000 description 6
- 230000018109 developmental process Effects 0.000 description 6
- 229920001568 phenolic resin Polymers 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 235000015110 jellies Nutrition 0.000 description 5
- 239000008274 jelly Substances 0.000 description 5
- 230000000813 microbial effect Effects 0.000 description 5
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 4
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 4
- 102000004169 proteins and genes Human genes 0.000 description 4
- 108090000623 proteins and genes Proteins 0.000 description 4
- OMDQUFIYNPYJFM-XKDAHURESA-N (2r,3r,4s,5r,6s)-2-(hydroxymethyl)-6-[[(2r,3s,4r,5s,6r)-4,5,6-trihydroxy-3-[(2s,3s,4s,5s,6r)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]methoxy]oxane-3,4,5-triol Chemical compound O[C@@H]1[C@@H](O)[C@@H](O)[C@@H](CO)O[C@@H]1OC[C@@H]1[C@@H](O[C@H]2[C@H]([C@@H](O)[C@H](O)[C@@H](CO)O2)O)[C@H](O)[C@H](O)[C@H](O)O1 OMDQUFIYNPYJFM-XKDAHURESA-N 0.000 description 3
- 229920000926 Galactomannan Polymers 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 229920013818 hydroxypropyl guar gum Polymers 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008961 swelling Effects 0.000 description 3
- 102000008186 Collagen Human genes 0.000 description 2
- 108010035532 Collagen Proteins 0.000 description 2
- 239000004971 Cross linker Substances 0.000 description 2
- 229920000057 Mannan Polymers 0.000 description 2
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 2
- 125000002091 cationic group Chemical group 0.000 description 2
- 229920001436 collagen Polymers 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 150000003272 mannan oligosaccharides Chemical class 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 2
- 235000017557 sodium bicarbonate Nutrition 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 241000193830 Bacillus <bacterium> Species 0.000 description 1
- 244000063299 Bacillus subtilis Species 0.000 description 1
- 235000014469 Bacillus subtilis Nutrition 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 229920002488 Hemicellulose Polymers 0.000 description 1
- 108090000604 Hydrolases Proteins 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 241001148470 aerobic bacillus Species 0.000 description 1
- 239000003619 algicide Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 229940088710 antibiotic agent Drugs 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000012258 culturing Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000001963 growth medium Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009630 liquid culture Methods 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000002207 metabolite Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003641 microbiacidal effect Effects 0.000 description 1
- 244000000010 microbial pathogen Species 0.000 description 1
- 229940124561 microbicide Drugs 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 150000002772 monosaccharides Chemical class 0.000 description 1
- 239000002120 nanofilm Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 229920001542 oligosaccharide Polymers 0.000 description 1
- 150000002482 oligosaccharides Chemical class 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001184 polypeptide Polymers 0.000 description 1
- 102000004196 processed proteins & peptides Human genes 0.000 description 1
- 108090000765 processed proteins & peptides Proteins 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000725 suspension Substances 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
-
- 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
- C09K8/887—Compositions based on water or polar solvents containing organic compounds macromolecular 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
-
- 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
-
- 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
- C09K2208/24—Bacteria or enzyme containing gel 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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/32—Anticorrosion additives
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention provides a fracturing fluid product which comprises base fluid, gel breaking enzyme and a cross-linking agent, wherein the base fluid, the gel breaking enzyme and the cross-linking agent are mixed when the fracturing fluid product is used for hydraulic fracturing, and the gel breaking enzyme comprises beta-mannanase produced by bacillus amyloliquefaciens CB-019 with the preservation number of CGMCC No. 11950. The fracturing fluid product can meet the low-temperature construction requirement of high-salinity water, can be directly prepared by using the high-salinity water, overcomes the problems of guar gum in chemical tackifying under high salinity, difficult pH value control, incapability of carrying sand and the like, and achieves the requirements of stably increasing yield and improving the exploitation amount. The gel breaking enzyme has obvious improvement effect on the problems of difficult low-temperature gel breaking, poor gel breaking timeliness, high residue content and the like of a high-salinity hydraulic fracturing fluid system.
Description
Technical Field
The invention belongs to the field of research on offshore oil and gas resource development technology, and particularly relates to application of a biological enzyme gel breaker in a high-salinity water-based fracturing fluid product and the fracturing fluid product.
Background
With the development strategy of oil and gas resources, the ocean has become one of the important trends of oil and gas resource development. Ocean oil and gas resources are quite rich, but the development degree of ocean oil and gas fields is generally lower, so that more and more attention is paid to the development of the ocean oil and gas fields to improve the oil and gas yield.
The fracturing fluid is widely applied to onshore oil fields, and the main component of the fracturing fluid is fresh water except for the thickening agent. If the land fresh water fracturing fluid is used for offshore construction, the scale of the fracturing construction is greatly limited due to the limitation of an operation carrier, a liquid storage space and fresh water delivery, the operation period can be seriously influenced, and the cost is increased. Therefore, the seawater-based fracturing fluid system which meets the requirement of offshore platform construction and realizes continuous mixing has the advantages of reducing cost, improving construction efficiency, saving fresh water resources and the like, thereby realizing the efficient development of offshore oil and gas fields.
The thickening agent is widely applied to hydraulic fracturing, because the thickening agent contains a small amount of protein, crude fiber and other insoluble substances, if seawater is used for replacing fresh water for fracturing, gel breaking is incomplete, and a large amount of water-insoluble substances are generated in the gel breaking process, so that channels are blocked, and the fracturing effect is influenced. Currently, oxidizers and enzymes are mainly used as breakers. However, since the reactivity of the oxidant is proportional to the temperature, the higher the temperature, the stronger the reactivity, the faster the gel breaking, and the more thorough the gel breaking. The gel breaking performance is obviously reduced at low temperature. And the general gel breaking enzyme can only break gel at 40-70 ℃ and pH value of 3.5-7.5, and has small temperature range and large limitation. Therefore, the purpose of gel breaking is difficult to achieve in the fracturing process of the low-temperature oil and gas reservoir, and therefore offshore low-temperature gel breaking becomes a technical difficulty. The novel gel breaking method can realize gel breaking of the offshore fracturing fluid at low temperature, has less gel breaking residues, and is a research hotspot and improvement direction of the existing seawater fracturing technology and fracturing fluid performance evaluation.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a fracturing fluid product and application thereof.
Specifically, the present invention relates to the following aspects:
1. a fracturing fluid product, which is characterized by comprising a base fluid, a gel breaking enzyme and a cross-linking agent, wherein the base fluid, the gel breaking enzyme and the cross-linking agent are mixed when used for hydraulic fracturing, wherein the gel breaking enzyme comprises beta-mannanase produced by Bacillus amyloliquefaciens CB-019 with the preservation number of CGMCC No. 11950.
2. The fracturing fluid product of item 1, wherein the base fluid comprises a thickener, a cleanup additive, a bactericide, a clay stabilizer, a pH regulator and hypersalinity water, wherein the hypersalinity water has a mineralization degree of not less than 1 x 104mg/L。
3. The fracturing fluid product of claim 2, wherein the base fluid is comprised of a thickener, a cleanup additive, a biocide, a clay stabilizer, a pH adjuster, and hypersalinity water.
4. The fracturing fluid product of claim 2, wherein the base fluid contains 0.25 to 0.45 mass% of the thickener, 0.1 to 0.5 mass% of the cleanup additive, 0.01 to 0.05 mass% of the bactericide, 0.2 to 1 mass% of the clay stabilizer, and 0.05 to 0.1 mass% of the pH regulator.
5. The fracturing fluid product of claim 2, wherein the thickener is selected from one or more of guar gum raw powder, guar gum or hydroxypropyl guar gum powder.
6. The fracturing fluid product of claim 2, wherein the cleanup additive is one or more selected from the group consisting of sodium dodecylbenzene sulfonate, sodium fatty alcohol ether sulfate, quaternary dodecyl ammonium salt, sodium perfluorononenoxybenzene sulfonate, and octylphenol polyoxyethylene ether-10.
7. The fracturing fluid product of claim 2, wherein the biocide is selected from one or more of a bimolecular surfactant type biocide, dodecyl dimethyl benzyl chloride, and a quaternary phosphonium salt biocide.
8. The fracturing fluid product of claim 2, wherein the clay stabilizer is selected from one or more of inorganic salts, inorganic cationic polymers, and cationic surfactants.
9. The fracturing fluid product of claim 2, wherein the pH regulator is selected from one or more of sodium carbonate, sodium bicarbonate and sodium hydroxide.
10. The fracturing fluid product of claim 2, wherein the base fluid has a pH of 6.7 to 7.0.
11. The fracturing fluid product of claim 1, wherein the cross-linking agent comprises one or more of a polyepoxy compound pEPC, a water-soluble phenolic resin, an organoboron and a methylene bisacrylamide, and preferably the cross-linking agent comprises the polyepoxy compound pEPC, the water-soluble phenolic resin and the organoboron.
12. The fracturing fluid product according to item 1, wherein in the fracturing fluid product, the ratio of the enzyme activity of the gel breaker to the volume of the base fluid is 100-900 IU/ml, preferably 200-500 IU/ml, and the volume ratio of the crosslinking agent to the base fluid is 0.1-0.8: 100, preferably 0.2-0.5: 100.
13. Use of a fracturing fluid product in hydraulic fracturing, wherein the fracturing fluid product is a fracturing fluid product according to any one of items 1 to 12.
14. Use according to claim 13, comprising the step of mixing the base fluid, the gel breaker and the cross-linking agent to form a gel.
15. Use according to item 13, characterized in that it comprises use in offshore low-permeability oil fields.
16. The use according to item 13, wherein the temperature during hydraulic fracturing is 0-85 ℃ which is adaptable during hydraulic fracturing.
17. A method of gel breaking under hypersalinity water-based conditions, comprising:
mixing the base solution, the gel breaking enzyme and the cross-linking agent to form jelly;
performing gel breaking on the jelly;
wherein the water-based condition of high mineralization degree refers to that the mineralization degree is more than or equal to 1 multiplied by 104Conditions of mg/L;
the gel breaking enzyme comprises beta-mannanase produced by bacillus amyloliquefaciens CB-019 with the preservation number of CGMCC No. 11950.
18. The method of claim 17, wherein the base fluid is the base fluid of any one of items 2-10.
19. The method according to item 17, wherein the crosslinking agent comprises one or more of a polyepoxy compound pEPC, a water-soluble phenol resin, an organoboron, and methylenebisacrylamide, and preferably the crosslinking agent comprises the polyepoxy compound pEPC, a water-soluble phenol resin, and an organoboron.
20. The method according to item 17, wherein the ratio of the enzyme activity of the gel breaker to the volume of the base solution is 100 to 900IU/ml, preferably 200 to 500IU/ml, and the volume ratio of the crosslinking agent to the base solution is 0.1 to 0.8:100, preferably 0.2 to 0.5: 100.
21. The application of the biological enzyme gel breaker in the high-salinity water-based fracturing fluid product is characterized in that the gel breaker comprises beta-mannanase produced by bacillus amyloliquefaciens CB-019 with the preservation number of CGMCC No.11950, and the high-salinity water has the salinity of more than or equal to 1 x 104mg/L of water.
The fracturing fluid product can meet the requirements of offshore low-temperature construction, can be prepared directly by using seawater, overcomes the problems of guar gum in high salinity, difficult pH value control, incapability of carrying sand and the like, and achieves the requirements of increasing yield stably and improving the production yield.
The gel breaking enzyme has obvious improvement effect on the problems of difficult low-temperature gel breaking, poor gel breaking timeliness, high residue content and the like of an offshore fracturing fluid system. The addition of the gel breaking enzyme does not affect the sand carrying capacity of a system in the offshore fracturing process, the gel breaking time, residue amount and surface interfacial tension of the gel breaking liquid of the system can meet or exceed the requirements of national and industrial standards, and the innovative application of the gel breaking enzyme in the weight of the seawater fracturing liquid is an important research and development direction of the low-temperature seawater-based fracturing liquid.
Detailed Description
The present invention is further illustrated by the following examples, which are intended to be purely exemplary of the invention and are not intended to be limiting.
Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. Although methods and materials similar or equivalent to those described herein can be used in experimental or practical applications, the materials and methods are described below. In case of conflict, the present specification, including definitions, will control, and the materials, methods, and examples are illustrative only and not intended to be limiting. The present invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
The invention provides a fracturing fluid product which comprises base fluid, gel breaking enzyme and a cross-linking agent, wherein the base fluid, the gel breaking enzyme and the cross-linking agent are mixed when the fracturing fluid product is used for hydraulic fracturing, wherein the gel breaking enzyme comprises beta-mannanase (mainly crude enzyme) produced by bacillus amyloliquefaciens CB-019 with the preservation number of CGMCC No. 11950. The base fluid, gel breaker and cross-linking agent in the fracturing fluid product are separate, i.e., not mixed together, prior to use in hydraulic fracturing. When the fracturing fluid product is used for hydraulic fracturing, the fracturing fluid product is mixed, namely base fluid, gel breaking enzyme and a cross-linking agent are mixed.
Beta-mannase (beta-mannase) is a hemicellulose hydrolase with wide source, wherein guar gum is a polymer which is galactomannan and is formed by connecting beta-1, 4-glycosidic bond as a main chain and alpha-1, 6-glycosidic bond as a branched chain; the beta-mannase can hydrolyze guar gum (mannan) into mannan-oligosaccharide by decomposing beta-1, 4-glycosidic bond, and then the mannan-oligosaccharide is changed into monosaccharide or oligosaccharide, thereby achieving the purpose of breaking gum. . The gel breaking enzyme is beta-mannase produced by bacillus amyloliquefaciens CB-019 with the preservation number of CGMCC No. 11950.
Wherein, Bacillus amyloliquefaciens (Bacillus amyloliquefaciens) is gram-positive Bacillus, aerobic bacteria and Bacillus subtilis, has high affinity, can generate a series of low molecular weight antibiotics, antibacterial proteins or polypeptides and other active metabolites during the growth process, and has surface activity, broad-spectrum antibacterial activity and anti-adversity, high growth speed and good stability. The related information of the Bacillus amyloliquefaciens CB-019 with the preservation number of CGMCC No.11950 can be seen in CN 201610632519.0.
In a specific embodiment, the method for producing the beta-mannanase by using the bacillus amyloliquefaciens CB-019 with the preservation number of CGMCC No.11950 comprises the following steps: sterilizing and cooling the liquid culture medium, inoculating the enzyme-producing microorganism bacillus amyloliquefaciens CB-019, culturing and fermenting, and extracting the beta-mannase.
In a specific embodiment, the gel breaker is a FANTA-05 low temperature bio-enzyme gel breaker (Dalian know Microbiol technologies, Inc.).
The base fluid comprises a thickening agent, a discharge assistant, a bactericide, a clay stabilizer, a pH regulator and hypersalinity water, wherein the mineralization degree of the hypersalinity water is more than or equal to 1 x 104mg/L。
Wherein, the thickening agent can increase the viscosity of the system, and the system can keep a uniform and stable suspension state or an emulsion state or form gel. In a specific embodiment, the thickener is selected from one or more of galactomannan gum, guar raw powder, guar gum or hydroxypropyl guar powder. Wherein the guar gum is a macromolecular natural hydrophilic colloid, belongs to natural galactomannan, is one of quality modifiers, and is a natural thickener. The guar collagen powder contains protein and crude fiber, has high content of water insoluble substances, has the disadvantages of slow dissolving speed, easy generation of caking, fish eyes and the like, and seriously influences the applicability of the guar collagen powder; the modified guar gum is prepared by chemically modifying guar gum raw powder mainly by utilizing unique structural characteristics and performance of guar gum, namely introducing cationic groups on a molecular chain to produce cationic guar gum, overcomes the defects of the raw gum in the aspect of physical and chemical performance, and is widely applied, including that propylene oxide is used for preparing hydroxypropyl guar gum under the action of an alkaline catalyst.
The cleanup additive has high surface activity, low surface tension and interfacial tension, can improve the wettability of the rock surface of an oil layer, and accelerates the reverse drainage of fracturing fluid; meanwhile, the emulsion breaking agent has good emulsion preventing and breaking performances, and can reduce formation damage. In a specific embodiment, the cleanup additive is one or more selected from sodium dodecyl benzene sulfonate, sodium fatty alcohol ether sulfate, quaternary dodecyl ammonium salt, sodium perfluorononenoxybenzene sulfonate, and octyl phenol polyoxyethylene ether-10.
Biocides, also known as biocides, bactericidal algicides, microbicides, and the like, generally refer to chemical agents that are effective in controlling or killing microorganisms, bacteria, fungi, and algae, in aqueous systems. Generally speaking, the traditional Chinese medicine is a general term of the medicine for preventing and treating various pathogenic microorganisms. In a specific embodiment, the bactericide is one or more selected from a bimolecular film surfactant type bactericide, dodecyl dimethyl benzyl chloride and a quaternary phosphonium salt type bactericide.
The clay stabilizer can be effectively adsorbed on the surface of clay, and the damage to an oil-gas layer caused by hydration expansion and dispersion migration of water-sensitive minerals is prevented. In one embodiment, the clay stabilizer is one or more selected from inorganic salts, inorganic cationic polymers, and cationic surfactants. The pH regulator is used for regulating the pH of the base fluid. In a specific embodiment, the pH adjusting agent is selected from one or more of sodium carbonate, sodium bicarbonate, and sodium hydroxide. In a specific embodiment, the pH of the base fluid is adjusted to 6.7 to 7.0 using a pH adjuster.
In a specific embodiment, the degree of mineralization of said hypersaline water is ≧ 1X 104mg/L, for example, may be 1X 104mg/L、2×104mg/L、3×104mg/L、4×104mg/L、5×104mg/L, etc. Wherein, the Mineralization (Mineralization of water) refers to the sum of carbonate, bicarbonate, chloride, sulfate, nitrate and various sodium salts of metals such as calcium, magnesium, aluminum, manganese and the like contained in water. Generally expressed in terms of the total amount of various salts contained in 1L of water, in mg/L or g/L, and also approximately expressed in parts per thousand (thousandth). The degree of mineralization is an important index for measuring the chemical components of water, is used for evaluating the total salt content in water, and can divide underground water into five types according to the degree of mineralization: (1) fresh water with the mineralization degree less than 1 g/L; (2) brackish water (weakly mineralized water) with a degree of mineralization of 1-3 g/L; (3) the salinity of the salt water (moderate mineralized water) is 3-10 g/L; (4) the salinity of the saline water (strongly mineralized water) is 10-50 g/L; (5) the mineralization degree of the brine is more than 50 g/L.
In a particular embodiment, the hypersaline water is seawater. Because the thickening agent in the base fluid contains a small amount of protein, crude fiber and other insoluble substances, when seawater is used for replacing fresh water for fracturing, the fracturing is usually incomplete, and a large amount of water-insoluble substances are generated in the fracturing process, so that channels are blocked, and the fracturing effect is influenced. In the invention, the beta-mannase produced by using the bacillus amyloliquefaciens CB-019 with the preservation number of CGMCC No.11950 ensures that the fracturing fluid product is also applicable to seawater with high salinity. The enzyme can ensure high enzyme activity and good functionality under the condition of high mineralization degree, and can meet the characteristics of continuous gel breaking and thorough gel breaking.
In a specific embodiment, the mass content of the thickener is 0.25 to 0.45%, and may be, for example, 0.25%, 0.26%, 0.27%, 0.28%, 0.29%, 0.30%, 0.31%, 0.32%, 0.33%, 0.34%, 0.35%, 0.36%, 0.37%, 0.38%, 0.39%, 0.40%, 0.41%, 0.42%, 0.43%, 0.44%, 0.45%; the mass content of the cleanup additive is 0.1-0.5%, for example, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%; (ii) a The mass content of the bactericide is 0.01-0.5%, for example, 0.01%, 0.02%, 0.03%, 0.04%, 0.05%; the clay stabilizer may be contained in an amount of 0.2 to 1% by mass, for example, 0.2%, 0.21%, 0.22%, 0.23%, 0.24%, 0.25%, 0.26%, 0.27%, 0.28%, 0.29%, 0.30%, 0.31%, 0.32%, 0.33%, 0.34%, 0.35%, 0.36%, 0.37%, 0.38%, 0.39%, 0.40%, 0.41%, 0.42%, 0.43%, 0.44%, 0.45%, 0.46%, 0.47%, 0.48%, 0.49%, 0.50%, 0.51%, 0.52%, 0.53%, 0.54%, 0.55%, 0.56%, 0.57%, 0.58%, 0.59%, 0.60%, 0.61%, 0.62%, 0.63%, 0.64%, 0.65%, 0.66%, 0.67%, 0.68%, 0.70%, 0.76%, 0.80%, 0.90%, 0.80%, 0., 0.98%, 0.99% and 1.00%. The content of the pH adjuster is 0.05 to 0.1% by mass, and may be, for example, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.1%.
In a particular embodiment, the base fluid is comprised of a thickener, a drainage aid, a biocide, a pH adjuster, and hypersaline water. Wherein the thickener, cleanup additive, biocide, clay stabilizer, pH adjuster, and hypersaline water are defined as above.
In one specific embodiment, the base fluid is prepared by the following method: accurately taking the components of the thickening agent, the cleanup additive, the bactericide, the pH regulator and the like according to the mixture ratio, adding the thickening agent, the bactericide and the clay stabilizer into seawater, uniformly mixing, then adding the cleanup additive and the pH regulator, uniformly mixing, standing and swelling, and regulating the pH of the base solution to be 7; wherein the standing and swelling time is 0.5-4 h, preferably 4h, and the temperature is room temperature; the mixing method can adopt a stirring mode, for example, stirring for 5-20 min at a rotating speed of 150-300 r/min to obtain a uniform solution, namely the base solution.
In a specific embodiment, the cross-linking agent comprises one or more than two of polyepoxy compound pEPC, water-soluble phenolic resin, organoboron and methylene bisacrylamide. For example, the crosslinking agent may include only the polyepoxide pEPC, a water-soluble phenolic resin, an organoboron, or methylenebisacrylamide. Any two, any three, or four of the four substances described above may also be included. Preferably, the cross-linking agent comprises three substances of a polyepoxy compound pEPC, a water-soluble phenolic resin and an organic boron.
In a preferred embodiment, the crosslinking agent is a super-strong delayed crosslinking agent of SITAR-II type (Dalianzhi microbial science and technology Co., Ltd.), and the components of the crosslinking agent comprise 0.1-2% by mass of a polyepoxy compound pEPC, 0.2-3% by mass of a water-soluble phenolic resin, 5-35% by mass of an organoboron, and the balance of water.
In the fracturing fluid product, the ratio of the enzyme activity of the gel breaker to the volume of the base fluid is 100-900 IU/ml, and the volume ratio of the cross-linking agent to the base fluid is 0.1-0.8: 100. Wherein, the enzyme activity unit IU of the gel breaking enzyme refers to the enzyme quantity which can convert 1 micromole of substrate in 1 minute under specific conditions (25 ℃, and the other conditions are optimal conditions), or the enzyme quantity which can convert 1 micromole of related groups in the substrate. Specifically, the enzyme activity unit IU of the beta-mannanase refers to the amount of enzyme capable of converting 1 micromole of mannan at 25 ℃ in 1 minute. The ratio of the enzyme activity of the gel breaking enzyme to the volume of the base solution is 100-900 IU/ml, and can be 100IU/ml, 200IU/ml, 300IU/ml, 400IU/ml, 500IU/ml, 600IU/ml, 700IU/ml, 800IU/ml and 900IU/ml, and the preferable range is 200-500 IU/ml. The volume ratio of the crosslinking agent to the base fluid is 0.1-0.8: 100, and for example, may be 0.1:100, 0.2: 100. 0.3:100, 0.4:100, 0.5:100, 0.6:100, 0.7:100, 0.8:100, preferably in the range of 0.2-0.5: 100.
The invention also provides application of the fracturing fluid product in hydraulic fracturing.
Further, the application comprises the steps of adding a cross-linking agent and gel breaking enzyme into the base fluid to form stable gel, breaking the gel at low temperature, fracturing and discharging the gel-breaking fluid carrying crude oil to the ground, and improving the crude oil recovery rate of the oil well.
In a particular embodiment, the application comprises an application in an offshore low-permeability oil field.
In a specific embodiment, the hydraulic fracturing may be applied at 0-85 ℃, for example, at 0 ℃,4 ℃, 10 ℃, 20 ℃, 30 ℃, 40 ℃, 50 ℃, 60 ℃, 70 ℃, 80 ℃, 85 ℃.
The invention also provides a method for breaking gel under the condition of high salinity water base, which comprises the following steps: mixing the base solution, the gel breaking enzyme and the cross-linking agent to form jelly; performing gel breaking on the jelly; wherein the water-based condition of high mineralization degree refers to that the mineralization degree is more than or equal to 1 multiplied by 104Conditions of mg/L; the gel breaking enzyme comprises beta-mannanase produced by bacillus amyloliquefaciens CB-019 with the preservation number of CGMCC No. 11950.
Wherein, the ratio of the enzyme activity of the base fluid, the cross-linking agent and the gel breaking enzyme to the volume of the base fluid and the volume ratio of the cross-linking agent to the base fluid are as described above.
The invention also provides application of the biological enzyme gel breaker in a high-salinity water-based fracturing fluid product, wherein the gel breaker comprises beta-mannanase produced by bacillus amyloliquefaciens CB-019 with the preservation number of CGMCC No.11950, and the high-salinity water has the salinity of more than or equal to 1 x 104mg/L of water.
When the gel breaking enzyme and the cross-linking agent are used, particularly the ratio of the enzyme activity of the gel breaking enzyme to the volume of the base fluid is 100-900 IU/ml, and the volume ratio of the cross-linking agent to the base fluid is 0.1-0.8: 100, the fracturing fluid product has good gel breaking performance at low temperature such as 4 ℃ and 10 ℃, and particularly can be used for the condition that the mineralization degree is more than or equal to 1 x 104The base fluid of mg/L hypersalinity water can meet the requirement of offshore low-temperature construction, can directly prepare fracturing fluid by using seawater, and achieves the requirements of increasing yield stably and improving the production yield.
Example 1
The seawater-based fracturing fluid system consists of seawater-based base fluid (referred to as base fluid in the following description), a gel breaker and a cross-linking agent, wherein the base fluid consists of the following components in percentage by mass: 0.28% of thickening agent (hydroxypropyl guar gum), 0.3% of discharge assistant (ZITHE-34, a type efficient discharge assistant, Dalianzhi microbial technology limited company, which takes sodium dodecyl benzene sulfonate, sodium fatty alcohol ether sulfate and dodecyl quaternary ammonium salt as main components), 0.05% of bactericide (DMTPC, the Dalianzhi microbial technology limited company, which takes a bi-molecular film surfactant type bactericide and a quaternary phosphonium salt bactericide as main components), 0.05% of pH regulator (sodium bicarbonate) and the balance of seawater, wherein the mineralization degree of the seawater is 26030 mg/L. The cross-linking agent is SITAR-II type super strong delayed cross-linking agent (Dalianzhi microbial technology Co., Ltd.), and the volume ratio of the base liquid to the cross-linking agent is 100: 0.3; the gel breaking enzyme is FANTA-05 low-temperature gel breaking enzyme (Dalianzhi microbial technology Co., Ltd.) 300 IU/ml.
Accurately taking the components according to the given mass percentages of the components, and preparing the jelly of the seawater-based fracturing pad fluid system according to the following method: sequentially adding a thickening agent and a bactericide into seawater at a rotation speed of 300r/min while stirring according to a ratio, sequentially adding a cleanup additive and a pH regulator after stirring for l0min, continuously stirring for 5min, uniformly mixing, standing and swelling for 4h to obtain a base solution; and (3) taking 100mL of the base solution, adding the SITAR-II type super strong delayed crosslinking agent and the gel breaking enzyme while stirring at the rotating speed of 300r/min, and continuously stirring for 1min to form the gel. The gel is broken at constant temperature of 10 ℃ and 4 ℃ respectively.
The residue content, viscosity and surface tension of the gel breaking solution were measured according to the specification of SY/T5107-2016 Water-based fracturing fluid Performance evaluation method.
Examples 2 to 3
Examples 2-3 differ from example 1 only in the amount of the gel breaker used, namely FANTA-05 low temperature gel breaker. Wherein, the volume ratio of the gel breaking enzyme to the base liquid used in the embodiment 2 is 100IU/ml, and the volume ratio of the gel breaking enzyme to the base liquid used in the embodiment 3 is 900 IU/ml. Other reaction conditions were the same. Specifically, the results are shown in Table 1.
Examples 4 to 7
Examples 4-7 differ from example 1 only in the amount of the superstrong retardation crosslinking agent of type SITAR-ii. Wherein, the volume ratio of the SITAR-II type super strong delayed crosslinking agent used in the example 4 to the base liquid is 8:100, the volume ratio of the SITAR-II type super strong delayed crosslinking agent used in the example 5 to the base liquid is 0.1:100, the volume ratio of the SITAR-II type super strong delayed crosslinking agent used in the example 6 to the base liquid is 0.01:100, and the volume ratio of the SITAR-II type super strong delayed crosslinking agent used in the example 7 to the base liquid is 10: 100. Other reaction conditions were the same. Specifically, the results are shown in Table 1.
Example 8
Example 8 differs from example 1 in that the crosslinker used is not a superstrong retardation crosslinker of the type SITAR-ii but borax. Other reaction conditions were the same. Specifically, the results are shown in Table 1.
Example 9
The difference between example 9 and example 1 is that the crosslinking agent used is not a SITAR-II type ultra-strong delayed crosslinking agent, but JL-011 ultra-strong delayed crosslinking agent (Dalian Mikroorganscience, Inc.), which comprises polyepoxy compound pEPC 0.05-0.1 wt%, methylenebisacrylamide 0.2-2 wt%, organoboron 7-15 wt%, and water in balance. Other reaction conditions were the same. Specifically, the results are shown in Table 1.
Comparative example 1
Comparative example 1 differs from example 1 in that the gel breaker used is not FANTA-05 low temperature gel breaker, but Ammonium Persulfate (APS). Other reaction conditions were the same. Specifically, the results are shown in Table 1.
The reaction conditions of the specific examples and comparative examples are shown in table 1.
TABLE 1 specific conditions for the examples and comparative examples
The gel breaking effect at 10 ℃ measured in the above examples and comparative examples is shown in Table 2.
TABLE 2 gel breaking Performance at 10 ℃ for each of the examples and comparative examples
The gel breaking effect at 4 ℃ measured in the above examples and comparative examples is shown in Table 3.
TABLE 3 gel breaking Properties at 4 ℃ of the examples and comparative examples
Gel breaking time, viscosity, surface tension and residue amount can represent the gel breaking capacity of the fracturing fluid product, wherein the gel breaking time is too long to meet the requirements of site fracturing construction; the viscosity of the gel breaking liquid is high, and the sand carrying capacity is poor; the surface tension is low, the wettability of rock can be changed, the sweep effect is increased, and the oil extraction efficiency is improved; the low residue can reduce the damage of the flowback liquid to the reservoir, reduce the economic loss of the abrasion of the pipeline and simultaneously improve the recovery rate of crude oil.
Claims (10)
1. A fracturing fluid product, which is characterized by comprising a base fluid, a gel breaking enzyme and a cross-linking agent, wherein the base fluid, the gel breaking enzyme and the cross-linking agent are mixed when used for hydraulic fracturing, wherein the gel breaking enzyme comprises beta-mannanase produced by Bacillus amyloliquefaciens CB-019 with the preservation number of CGMCC No. 11950.
2. The fracturing fluid product of claim 1, wherein the base fluid comprises a thickener, a cleanup additive, a biocide, a clay stabilizer, a pH adjusterAgent and high salinity water, wherein the salinity of the high salinity water is more than or equal to 1 x 104mg/L。
3. The fracturing fluid product of claim 2, wherein the base fluid is comprised of a thickener, a cleanup additive, a biocide, a clay stabilizer, a pH adjuster, and hypersaline water.
4. The fracturing fluid product of claim 2, wherein the base fluid comprises 0.25 to 0.45% by mass of the thickener, 0.1 to 0.5% by mass of the cleanup additive, 0.01 to 0.05% by mass of the bactericide, 0.2 to 1% by mass of the clay stabilizer, and 0.05 to 0.1% by mass of the pH regulator.
5. The fracturing fluid product of claim 2, wherein the thickener is selected from one or more of guar gum raw powder, guar gum, or hydroxypropyl guar powder.
6. The fracturing fluid product of claim 2, wherein the cleanup additive is one or more selected from the group consisting of sodium dodecylbenzene sulfonate, sodium fatty alcohol ether sulfate, quaternary dodecyl ammonium salt, sodium perfluorononenoxybenzene sulfonate, and octyl phenol polyoxyethylene ether-10.
7. The fracturing fluid product of claim 2, wherein the biocide is selected from one or more of a bi-molecular membrane surfactant type biocide, dodecyl dimethyl benzyl chloride, and a quaternary phosphonium salt biocide.
8. The fracturing fluid product of claim 2, wherein the clay stabilizer is selected from one or more of inorganic salts, inorganic cationic polymers, and cationic surfactants.
9. The fracturing fluid product of claim 2, wherein the pH modifier is selected from one or more of sodium carbonate, sodium bicarbonate, and sodium hydroxide.
10. The fracturing fluid product of claim 2, wherein the base fluid has a pH of 6.7 to 7.0.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2021105108830 | 2021-05-11 | ||
CN202110510883 | 2021-05-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN113337267A true CN113337267A (en) | 2021-09-03 |
Family
ID=77473411
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202110604038.XA Pending CN113337267A (en) | 2021-05-11 | 2021-05-31 | Application of biological enzyme gel breaker in high-salinity water-based fracturing fluid product and fracturing fluid product |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN113337267A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114686199A (en) * | 2022-04-22 | 2022-07-01 | 大庆华理生物技术股份有限公司 | Composite fracturing fluid system slickwater |
CN115059460A (en) * | 2022-07-14 | 2022-09-16 | 重庆大学 | Method for reducing self-water-absorbing capacity of hydraulic fracturing shale reservoir |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103122344A (en) * | 2011-11-18 | 2013-05-29 | 陕西延长油田生物工程有限公司 | Process for producing gel-breaking bio-enzyme by fed-batch fermentation |
CN103333839A (en) * | 2013-07-05 | 2013-10-02 | 华东理工大学 | Mannanase, and gene and applications thereof |
CN106085404A (en) * | 2016-06-06 | 2016-11-09 | 中国石油化工股份有限公司 | A kind of Low Damage, super low concentration guar gum fracturing fluid system, preparation method and application |
WO2019022789A1 (en) * | 2017-07-26 | 2019-01-31 | Tjon Joe Pin Robert | Production of xanthan-degrading enzymes and methods of use |
CN109536156A (en) * | 2018-12-27 | 2019-03-29 | 大连知微生物科技有限公司 | A kind of biology base viscosity reduction/displacement of reservoir oil pad of frac system and its preparation method and application |
-
2021
- 2021-05-31 CN CN202110604038.XA patent/CN113337267A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103122344A (en) * | 2011-11-18 | 2013-05-29 | 陕西延长油田生物工程有限公司 | Process for producing gel-breaking bio-enzyme by fed-batch fermentation |
CN103333839A (en) * | 2013-07-05 | 2013-10-02 | 华东理工大学 | Mannanase, and gene and applications thereof |
CN106085404A (en) * | 2016-06-06 | 2016-11-09 | 中国石油化工股份有限公司 | A kind of Low Damage, super low concentration guar gum fracturing fluid system, preparation method and application |
WO2019022789A1 (en) * | 2017-07-26 | 2019-01-31 | Tjon Joe Pin Robert | Production of xanthan-degrading enzymes and methods of use |
CN109536156A (en) * | 2018-12-27 | 2019-03-29 | 大连知微生物科技有限公司 | A kind of biology base viscosity reduction/displacement of reservoir oil pad of frac system and its preparation method and application |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114686199A (en) * | 2022-04-22 | 2022-07-01 | 大庆华理生物技术股份有限公司 | Composite fracturing fluid system slickwater |
CN115059460A (en) * | 2022-07-14 | 2022-09-16 | 重庆大学 | Method for reducing self-water-absorbing capacity of hydraulic fracturing shale reservoir |
CN115059460B (en) * | 2022-07-14 | 2024-05-03 | 重庆大学 | Method for reducing self-water absorption of hydraulically fractured shale reservoir |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4658898A (en) | Oil reservoir permeability control using polymeric gels | |
CN113337267A (en) | Application of biological enzyme gel breaker in high-salinity water-based fracturing fluid product and fracturing fluid product | |
CN101781552B (en) | Bio-enzyme gel breaker and technique for water-based guargum fracturing gel breaking with the same | |
US6734146B2 (en) | Foamed fracturing fluids, additives and methods of fracturing subterranean zones | |
US11555142B2 (en) | Two-step process for microbial enhanced oil recovery | |
US3979303A (en) | Oil well drilling fluid | |
WO2012145949A1 (en) | Microorganism for displacing oil and composite oil-displacement agent comprising such microorganism | |
CN104789195A (en) | Bionic shale inhibitor and preparation method thereof, drilling fluid and application thereof | |
CN101203615A (en) | Bacterial cellulose-containing formulations and method of producing effective bacterial cellulose-containing formulations | |
AU2006228043A1 (en) | Storable fracturing suspension containing ultra lightweight proppants in xanthan based carriers and methods of using the same | |
MX2008014507A (en) | Oxidized guar for oilfield servicing fluids. | |
RU2013153499A (en) | METHOD FOR STABILIZING HYDROPHILIC CLAY | |
CN110964496B (en) | Fracturing fluid thickening tackifier | |
Wu et al. | Design and characterization of a microbial self-healing gel for enhanced oil recovery | |
CN108690598A (en) | A kind of shale gas water blanket base fracturing fluid and preparation method thereof | |
CN107523280A (en) | A kind of thickening filtrate reducing complexing agent for seawater mud and preparation method thereof | |
CN107312516B (en) | Biological source compound oil displacement system, preparation method and oil displacement method | |
CN106834166B (en) | Sulfate reducing bacteria activator and application thereof in microbial oil recovery | |
US8833457B2 (en) | Sulfates and phosphates as allosteric effectors in mannanohydrolase enzyme breakers | |
Berezina et al. | Xanthan: enzymatic degradation and novel perspectives of applications | |
CN114836186B (en) | Biological thickened oil viscosity reducing agent and application thereof | |
JPH0127239B2 (en) | ||
CN109575904A (en) | A kind of seawater-based fracturing fluid and its preparation method and application | |
CN111925784B (en) | Guanidine gum fracturing fluid microbial composite oil displacement system and preparation method thereof | |
US20150368545A1 (en) | Method for enhanced recovery of oil from oil reservoirs |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
CB03 | Change of inventor or designer information | ||
CB03 | Change of inventor or designer information |
Inventor after: Zhao Jing Inventor after: Han Junjie Inventor before: Zhao Jing Inventor before: Sun Xiupeng Inventor before: Liu Yu Inventor before: Sun Yujun Inventor before: Han Junjie |