CN117004381A - Salt-resistant and temperature-resistant oilfield fracturing fluid thickener - Google Patents
Salt-resistant and temperature-resistant oilfield fracturing fluid thickener Download PDFInfo
- Publication number
- CN117004381A CN117004381A CN202310795536.6A CN202310795536A CN117004381A CN 117004381 A CN117004381 A CN 117004381A CN 202310795536 A CN202310795536 A CN 202310795536A CN 117004381 A CN117004381 A CN 117004381A
- Authority
- CN
- China
- Prior art keywords
- resistant
- fracturing fluid
- solution
- temperature
- parts
- 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 42
- 239000002562 thickening agent Substances 0.000 title claims abstract description 40
- 150000003839 salts Chemical class 0.000 title claims abstract description 24
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims abstract description 68
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims abstract description 34
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims abstract description 34
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 claims abstract description 34
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000002360 preparation method Methods 0.000 claims abstract description 19
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000004289 sodium hydrogen sulphite Substances 0.000 claims abstract description 15
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 8
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 8
- GCSJLQSCSDMKTP-UHFFFAOYSA-N ethenyl(trimethyl)silane Chemical compound C[Si](C)(C)C=C GCSJLQSCSDMKTP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 229920000570 polyether Polymers 0.000 claims abstract description 8
- UFHILTCGAOPTOV-UHFFFAOYSA-N tetrakis(ethenyl)silane Chemical compound C=C[Si](C=C)(C=C)C=C UFHILTCGAOPTOV-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229920000536 2-Acrylamido-2-methylpropane sulfonic acid Polymers 0.000 claims abstract description 5
- XHZPRMZZQOIPDS-UHFFFAOYSA-N 2-Methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid Chemical compound OS(=O)(=O)CC(C)(C)NC(=O)C=C XHZPRMZZQOIPDS-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000000243 solution Substances 0.000 claims description 46
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 42
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 30
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 30
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 30
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 21
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical class [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 239000000047 product Substances 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 14
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 239000013078 crystal Substances 0.000 claims description 9
- 239000010446 mirabilite Substances 0.000 claims description 9
- 239000011259 mixed solution Substances 0.000 claims description 9
- 239000000725 suspension Substances 0.000 claims description 9
- 230000001804 emulsifying effect Effects 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 238000005303 weighing Methods 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 6
- 239000007795 chemical reaction product Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 238000005868 electrolysis reaction Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 239000010440 gypsum Substances 0.000 claims description 6
- 229910052602 gypsum Inorganic materials 0.000 claims description 6
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 6
- 238000000967 suction filtration Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000011085 pressure filtration Methods 0.000 claims description 4
- DZSVIVLGBJKQAP-UHFFFAOYSA-N 1-(2-methyl-5-propan-2-ylcyclohex-2-en-1-yl)propan-1-one Chemical compound CCC(=O)C1CC(C(C)C)CC=C1C DZSVIVLGBJKQAP-UHFFFAOYSA-N 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 229910021529 ammonia Inorganic materials 0.000 claims description 3
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 claims description 3
- XYXNTHIYBIDHGM-UHFFFAOYSA-N ammonium thiosulfate Chemical compound [NH4+].[NH4+].[O-]S([O-])(=O)=S XYXNTHIYBIDHGM-UHFFFAOYSA-N 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 238000011001 backwashing Methods 0.000 claims description 3
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 3
- 238000002425 crystallisation Methods 0.000 claims description 3
- 230000008025 crystallization Effects 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims description 3
- 229960004887 ferric hydroxide Drugs 0.000 claims description 3
- 238000007602 hot air drying Methods 0.000 claims description 3
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000012452 mother liquor Substances 0.000 claims description 3
- 239000010413 mother solution Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000006116 polymerization reaction Methods 0.000 claims description 3
- -1 polyoxyethylene lauryl ether Polymers 0.000 claims description 3
- 229920000259 polyoxyethylene lauryl ether Polymers 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 3
- 235000011152 sodium sulphate Nutrition 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- WBHQBSYUUJJSRZ-UHFFFAOYSA-M sodium bisulfate Chemical compound [Na+].OS([O-])(=O)=O WBHQBSYUUJJSRZ-UHFFFAOYSA-M 0.000 claims description 2
- 229910000342 sodium bisulfate Inorganic materials 0.000 claims description 2
- 239000012267 brine Substances 0.000 claims 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims 2
- 239000002994 raw material Substances 0.000 abstract description 11
- 239000003795 chemical substances by application Substances 0.000 description 5
- 238000003491 array Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
-
- 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
- C09K8/602—Compositions for stimulating production by acting on the underground formation containing surfactants
- C09K8/604—Polymeric surfactants
-
- 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
- C09K8/882—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- 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
- C09K8/885—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/28—Per-compounds
- C25B1/29—Persulfates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Inorganic Chemistry (AREA)
- Electrochemistry (AREA)
- Metallurgy (AREA)
- Cosmetics (AREA)
Abstract
The invention belongs to the technical field of field fracturing fluid thickeners and discloses a salt-resistant and temperature-resistant oilfield fracturing fluid thickener, which is prepared from the following raw materials of 70 parts of acrylamide, 30 parts of 2-acrylamido-2-methylpropanesulfonic acid, 10 parts of vinyl trimethylsilane, 15 parts of tetravinylsilane, 33 parts of white oil, 6 parts of propylene glycol block polyether, 0.5 part of ammonium persulfate, 8 parts of thiourea, 0.4 part of sodium bisulphite and 200 parts of water. The invention adopts raw materials with specific proportion, and prepares the salt-resistant and temperature-resistant oilfield fracturing fluid thickener through a series of steps. In addition, the invention also provides a preparation method of ammonium persulfate and sodium bisulphite so as to ensure the quality of raw materials. The invention can effectively solve the problems of poor raw material impurities and quality in the prior art, and improve the quality and performance of the salt-resistant and temperature-resistant oilfield fracturing fluid thickener.
Description
Technical Field
The invention belongs to the technical field of field fracturing fluid thickeners, and particularly relates to a salt-resistant and temperature-resistant oilfield fracturing fluid thickener.
Background
The fracturing fluid is a heterogeneous unstable chemical system formed by a plurality of additives according to a certain proportion, is a working fluid used when the fracturing modification is carried out on an oil-gas layer, and has the main functions of transmitting high pressure formed by ground equipment into a stratum, so that the stratum is broken to form cracks and a propping agent is conveyed along the cracks; the hydraulic fracturing process of the oil layer adopts a high-pressure large-displacement pump on the ground, utilizes the principle of liquid pressure transmission, injects liquid with certain viscosity (commonly called fracturing liquid) into the oil layer at a pressure greater than the absorption capacity of the oil layer, and gradually increases the pressure in a shaft so as to hold up the high pressure at the bottom of the shaft, and when the pressure is greater than the ground stress near the well wall and the tensile strength of stratum rock, cracks are generated in the stratum near the bottom of the shaft: and continuously injecting sand-carrying fluid with propping agent, extending the crack forward and filling the propping agent, closing the crack on the propping agent after well shut-in, so that sand-filling cracks with a certain geometric dimension and high flow conductivity are formed in the stratum near the bottom of the well, and the purpose of increasing the production and the injection of the well is achieved. The commonly used propping agents include quartz sand, ceramsite and the like; however, the ammonium persulfate adopted by the prior preparation method of the salt-tolerant and temperature-tolerant oilfield fracturing fluid thickener contains impurities, which affect the quality of preparing the salt-tolerant and temperature-tolerant oilfield fracturing fluid thickener; meanwhile, the quality of the adopted raw material sodium bisulphite is poor, and the quality of the prepared salt-resistant and temperature-resistant oilfield fracturing fluid thickener is affected.
Through the above analysis, the problems and defects existing in the prior art are as follows:
(1) The ammonium persulfate adopted by the existing preparation method of the salt-tolerant and temperature-tolerant oilfield fracturing fluid thickening agent contains impurities, which affect the quality of the salt-tolerant and temperature-tolerant oilfield fracturing fluid thickening agent.
(2) The quality of the adopted raw material sodium bisulphite is poor, and the quality of the prepared salt-resistant and temperature-resistant oilfield fracturing fluid thickener is affected.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides a salt-resistant and temperature-resistant oilfield fracturing fluid thickener.
The invention is realized in such a way that the preparation method of the salt-resistant and temperature-resistant oilfield fracturing fluid thickener comprises the following steps:
step one, weighing 70 parts of acrylamide, 30 parts of 2-acrylamide-2-methylpropanesulfonic acid, 10 parts of vinyl trimethylsilane, 15 parts of tetravinyl silane, 33 parts of white oil, 6 parts of propylene glycol block polyether, 0.5 part of ammonium persulfate, 8 parts of thiourea, 0.4 part of sodium bisulfite and 200 parts of water according to parts by weight;
step two, stirring and dissolving acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, vinyl trimethyl silane, tetravinyl silane and water to obtain a mixed solution, regulating the pH value of the mixed solution to 8 by using sodium hydroxide, and adding a required amount of ammonium persulfate into the mixed solution to obtain a water phase;
step three, uniformly mixing white oil and propylene glycol block polyether to obtain an oil phase;
mixing and stirring the water phase and the oil phase to obtain an emulsifying system with the viscosity not less than 400 mPa.s, introducing nitrogen into the emulsifying system to remove oxygen, and then adding sodium bisulphite to initiate polymerization reaction to obtain a reaction product; and sequentially adding thiourea and isomeric polyoxyethylene lauryl ether into the reaction product to prepare the salt-resistant and temperature-resistant oilfield fracturing fluid thickening agent.
Further, the preparation method of the ammonium persulfate comprises the following steps:
(1) Dissolving crude ammonium sulfate with water to obtain 35% ammonium sulfate solution; removing ammonium thiosulfate by adopting an oxidation method; filtering to remove generated sulfur particles by adopting a box filter press; delivering the filtered solution to an ammonia removal system of an ammonia sulfate working section saturator to operate to obtain an ammonium sulfate mother solution; when the mass concentration of the ammonium sulfate mother liquor reaches 16%, producing an ammonium sulfate product by using a horizontal spiral pushing centrifugal machine; the obtained ammonium sulfate product is subjected to vibration drying bed and is continuously dried by using fluidized hot air, so that the finished product ammonium sulfate is obtained; ammonium sulfate is used as anolyte, sulfuric acid solution is used as catholyte, the flow of the anolyte is 10t/h, and the catholyte enters an electrolytic tank for electrolysis at 100 t/h;
(2) The electrolyzed anode liquid contains ammonium persulfate with certain concentration and has acidity of 0.3mol/L, and is conveyed to a reaction kettle through a pump; adding ammonium sulfate into the reaction kettle in a screw conveying mode until the concentration of the ammonium sulfate is 2g/mL, and introducing liquid ammonia of a liquid ammonia station to adjust the pH of the solution to about 7.5; filtering the solution by an anode filter to remove ferric hydroxide, and backwashing the solution once every two days by using sulfuric acid with acidity of 55;
(3) The filtered solution enters a cooling kettle to cool the solution to-5 ℃ so as to crystallize ammonium persulfate; introducing the material liquid containing the crystals into a centrifuge for separation to obtain ammonium persulfate crystals, and circularly introducing the mother liquid into an electrolytic tank to be used as anolyte for electrolysis; and (5) drying the ammonium persulfate crystal by a 95 ℃ fluidized bed dryer to obtain a product, and weighing and packaging after the product is inspected to be qualified.
Further, the liquid ammonia used in the production process may use liquid ammonia of an internal liquid ammonia station.
Further, the oxidation method adopts 28% of hydrogen peroxide by mass percent, the adding amount is 13%, and the time is 3 hours.
Further, the fluidized hot air drying is carried out at a temperature of 140 ℃ for 30 seconds.
Further, the rotational speed of the centrifugal separation is 2600r/min.
Further, the preparation method of the sodium bisulfite comprises the following steps:
1) Removing impurities from the modified calcium sulfite; adding modified calcium sulfite into water, and stirring to prepare a suspension with the concentration of 36%; adjusting the concentration of sulfuric acid to 4mol/L, and dissolving mirabilite in the sulfuric acid solution with adjusted concentration;
2) Adding the sulfuric acid solution dissolved with mirabilite into the modified calcium sulfite suspension by adopting a dropwise adding mode at 35 ℃, stirring at a rotating speed of 130r/min, stopping the reaction after the dropwise adding is finished and continuing to react for 65min, and obtaining sodium bisulfate solution by filter pressing or reduced pressure suction filtration;
3) Continuously adding modified calcium sulfite into the prepared sodium bisulfite solution to prepare a suspension with the concentration of the modified calcium sulfite being 33%, then continuously dropwise adding a sulfuric acid solution in which mirabilite is dissolved at 35 ℃, stirring at the speed of 130r/min, stopping the reaction after the dropwise adding is finished for continuously reacting for 65min, and obtaining the sodium bisulfite solution through pressure filtration or reduced pressure suction filtration.
Further, the molar ratio of the modified calcium sulfite, the sodium sulfate and the sulfuric acid is 1:2:1.
further, the prepared sodium bisulfite solution can be directly used, or sodium bisulfite solid is prepared through the procedures of evaporation, cooling, crystallization and drying.
And further, washing, drying and calcining the gypsum generated after the reaction to prepare semi-hydrated gypsum or anhydrous gypsum.
In combination with the technical scheme and the technical problems to be solved, the technical scheme to be protected has the following advantages and positive effects:
the invention provides a preparation method of a salt-resistant and temperature-resistant oilfield fracturing fluid thickener, which aims at the problems existing in the prior art, and comprises the following steps of containing impurities in raw material ammonium persulfate and poor quality of sodium bisulphite. The invention adopts raw materials with specific proportion, and prepares the salt-resistant and temperature-resistant oilfield fracturing fluid thickener through a series of steps. The method comprises the specific steps of weighing raw materials such as acrylamide, 2-acrylamide-2-methylpropanesulfonic acid, vinyl trimethyl silane, tetravinyl silane, white oil, propylene glycol block polyether, ammonium persulfate, thiourea, sodium bisulphite, water and the like, and preparing the thickener through the process steps of mixing, emulsifying, polymerizing and the like. In addition, the invention also provides a preparation method of ammonium persulfate and sodium bisulphite so as to ensure the quality of raw materials. The invention can effectively solve the problems of poor raw material impurities and quality in the prior art, and improves the quality and performance of the salt-resistant and temperature-resistant oilfield fracturing fluid thickening agent, thereby achieving the purposes of increasing yield and injection.
The ammonium persulfate prepared by the ammonium persulfate preparation method has high purity, so that the quality of preparing the salt-resistant and temperature-resistant oilfield fracturing fluid thickener is greatly improved; meanwhile, the sodium bisulphite prepared by the sodium bisulphite preparation method is high in quality, so that the quality of the salt-resistant and temperature-resistant oilfield fracturing fluid thickening agent is greatly improved.
Drawings
Fig. 1 is a flow chart of a preparation method of a salt-tolerant and temperature-tolerant oilfield fracturing fluid thickener provided by an embodiment of the invention.
FIG. 2 is a flow chart of a method for preparing ammonium persulfate according to an embodiment of the invention.
Fig. 3 is a flow chart of a preparation method of sodium bisulfite provided by the embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in FIG. 1, the invention provides a preparation method of a salt-tolerant and temperature-tolerant oilfield fracturing fluid thickener, which comprises the following steps:
s101, weighing 70 parts of acrylamide, 30 parts of 2-acrylamido-2-methylpropanesulfonic acid, 10 parts of vinyl trimethylsilane, 15 parts of tetravinyl silane, 33 parts of white oil, 6 parts of propylene glycol block polyether, 0.5 part of ammonium persulfate, 8 parts of thiourea, 0.4 part of sodium bisulfite and 200 parts of water according to parts by weight;
s102, stirring and dissolving acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, vinyl trimethyl silane, tetravinyl silane and water to obtain a mixed solution, regulating the pH value of the mixed solution to 8 by using sodium hydroxide, and adding a required amount of ammonium persulfate into the mixed solution to obtain a water phase;
s103, uniformly mixing white oil and propylene glycol block polyether to obtain an oil phase;
s104, mixing and stirring the water phase and the oil phase to obtain an emulsifying system with the viscosity not less than 400 mPa.s, introducing nitrogen into the emulsifying system to remove oxygen, and then adding sodium bisulphite to initiate polymerization reaction to obtain a reaction product; and sequentially adding thiourea and isomeric polyoxyethylene lauryl ether into the reaction product to prepare the salt-resistant and temperature-resistant oilfield fracturing fluid thickening agent.
As shown in FIG. 2, the preparation method of ammonium persulfate provided by the invention comprises the following steps:
s201, dissolving crude ammonium sulfate with water to obtain 35% ammonium sulfate solution by mass fraction; removing ammonium thiosulfate by adopting an oxidation method; filtering to remove generated sulfur particles by adopting a box filter press; delivering the filtered solution to an ammonia removal system of an ammonia sulfate working section saturator to operate to obtain an ammonium sulfate mother solution; when the mass concentration of the ammonium sulfate mother liquor reaches 16%, producing an ammonium sulfate product by using a horizontal spiral pushing centrifugal machine; the obtained ammonium sulfate product is subjected to vibration drying bed and is continuously dried by using fluidized hot air, so that the finished product ammonium sulfate is obtained; ammonium sulfate is used as anolyte, sulfuric acid solution is used as catholyte, the flow of the anolyte is 10t/h, and the catholyte enters an electrolytic tank for electrolysis at 100 t/h;
s202, the electrolyzed anode liquid contains ammonium persulfate with certain concentration, the acidity is 0.3mol/L, and the ammonium persulfate is conveyed to a reaction kettle through a pump; adding ammonium sulfate into the reaction kettle in a screw conveying mode until the concentration of the ammonium sulfate is 2g/mL, and introducing liquid ammonia of a liquid ammonia station to adjust the pH of the solution to about 7.5; filtering the solution by an anode filter to remove ferric hydroxide, and backwashing the solution once every two days by using sulfuric acid with acidity of 55;
s203, the filtered solution enters a cooling kettle to cool the solution to-5 ℃ so as to crystallize ammonium persulfate; introducing the material liquid containing the crystals into a centrifuge for separation to obtain ammonium persulfate crystals, and circularly introducing the mother liquid into an electrolytic tank to be used as anolyte for electrolysis; and (5) drying the ammonium persulfate crystal by a 95 ℃ fluidized bed dryer to obtain a product, and weighing and packaging after the product is inspected to be qualified.
The liquid ammonia used in the production process provided by the invention can be liquid ammonia of an internal liquid ammonia station.
The oxidation method provided by the invention adopts 28% of hydrogen peroxide by mass percent, the adding amount is 13%, and the time is 3 hours.
The fluidized hot air drying provided by the invention is carried out at the temperature of 140 ℃ for 30 seconds.
The rotational speed of the centrifugal separation provided by the invention is 2600r/min.
As shown in FIG. 3, the preparation method of sodium bisulfite provided by the invention comprises the following steps:
s301, carrying out impurity removal treatment on the modified calcium sulfite; adding modified calcium sulfite into water, and stirring to prepare a suspension with the concentration of 36%; adjusting the concentration of sulfuric acid to 4mol/L, and dissolving mirabilite in the sulfuric acid solution with adjusted concentration;
s302, adding a sulfuric acid solution dissolved with mirabilite into a modified calcium sulfite suspension in a dropwise adding mode at 35 ℃, stirring at a rotating speed of 130r/min, stopping the reaction after the dropwise adding is finished and continuing to react for 65min, and obtaining a sodium bisulfite solution through pressure filtration or reduced pressure suction filtration;
s303, continuously adding modified calcium sulfite into the prepared sodium bisulfite solution to prepare a suspension with the concentration of the modified calcium sulfite being 33%, continuously dropwise adding a sulfuric acid solution in which mirabilite is dissolved at 35 ℃, stirring at the speed of 130r/min, stopping the reaction after the dropwise adding is completed for continuously reacting for 65min, and obtaining the sodium bisulfite solution through pressure filtration or reduced pressure suction filtration.
The molar ratio of the modified calcium sulfite, the sodium sulfate and the sulfuric acid is 1:2:1.
the sodium bisulfite solution prepared by the invention can be directly used or is subjected to the procedures of evaporation, cooling, crystallization, drying and the like to prepare sodium bisulfite solid.
The gypsum produced after the reaction is washed, dried and calcined to prepare semi-hydrated gypsum or anhydrous gypsum.
The ammonium persulfate prepared by the ammonium persulfate preparation method in the application embodiment of the invention has high purity, so that the quality of preparing the salt-resistant and temperature-resistant oilfield fracturing fluid thickener is greatly improved; meanwhile, the sodium bisulphite prepared by the sodium bisulphite preparation method is high in quality, so that the quality of the salt-resistant and temperature-resistant oilfield fracturing fluid thickening agent is greatly improved.
It should be noted that the embodiments of the present invention can be realized in hardware, software, or a combination of software and hardware. The hardware portion may be implemented using dedicated logic; the software portions may be stored in a memory and executed by a suitable instruction execution system, such as a microprocessor or special purpose design hardware. Those of ordinary skill in the art will appreciate that the apparatus and methods described above may be implemented using computer executable instructions and/or embodied in processor control code, such as provided on a carrier medium such as a magnetic disk, CD or DVD-ROM, a programmable memory such as read only memory (firmware), or a data carrier such as an optical or electronic signal carrier. The device of the present invention and its modules may be implemented by hardware circuitry, such as very large scale integrated circuits or gate arrays, semiconductors such as logic chips, transistors, etc., or programmable hardware devices such as field programmable gate arrays, programmable logic devices, etc., as well as software executed by various types of processors, or by a combination of the above hardware circuitry and software, such as firmware.
The foregoing is merely illustrative of specific embodiments of the present invention, and the scope of the invention is not limited thereto, but any modifications, equivalents, improvements and alternatives falling within the spirit and principles of the present invention will be apparent to those skilled in the art within the scope of the present invention.
Claims (10)
1. The salt-tolerant and temperature-tolerant oilfield fracturing fluid thickener is characterized in that the preparation method of the salt-tolerant and temperature-tolerant oilfield fracturing fluid thickener comprises the following steps:
step one, weighing 70 parts of acrylamide, 30 parts of 2-acrylamide-2-methylpropanesulfonic acid, 10 parts of vinyl trimethylsilane, 15 parts of tetravinyl silane, 33 parts of white oil, 6 parts of propylene glycol block polyether, 0.5 part of ammonium persulfate, 8 parts of thiourea, 0.4 part of sodium bisulfite and 200 parts of water according to parts by weight;
step two, stirring and dissolving acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, vinyl trimethyl silane, tetravinyl silane and water to obtain a mixed solution, regulating the pH value of the mixed solution to 8 by using sodium hydroxide, and adding a required amount of ammonium persulfate into the mixed solution to obtain a water phase;
step three, uniformly mixing white oil and propylene glycol block polyether to obtain an oil phase;
mixing and stirring the water phase and the oil phase to obtain an emulsifying system with the viscosity not less than 400 mPa.s, introducing nitrogen into the emulsifying system to remove oxygen, and then adding sodium bisulphite to initiate polymerization reaction to obtain a reaction product; and sequentially adding thiourea and isomeric polyoxyethylene lauryl ether into the reaction product to prepare the salt-resistant and temperature-resistant oilfield fracturing fluid thickening agent.
2. The salt-resistant and temperature-resistant oilfield fracturing fluid thickener according to claim 1, wherein the ammonium persulfate is prepared by the following steps:
(1) Dissolving crude ammonium sulfate with water to obtain 35% ammonium sulfate solution; removing ammonium thiosulfate by adopting an oxidation method; filtering to remove generated sulfur particles by adopting a box filter press; delivering the filtered solution to an ammonia removal system of an ammonia sulfate working section saturator to operate to obtain an ammonium sulfate mother solution; when the mass concentration of the ammonium sulfate mother liquor reaches 16%, producing an ammonium sulfate product by using a horizontal spiral pushing centrifugal machine; the obtained ammonium sulfate product is subjected to vibration drying bed and is continuously dried by using fluidized hot air, so that the finished product ammonium sulfate is obtained; ammonium sulfate is used as anolyte, sulfuric acid solution is used as catholyte, the flow of the anolyte is 10t/h, and the catholyte enters an electrolytic tank for electrolysis at 100 t/h;
(2) The electrolyzed anode liquid contains ammonium persulfate with certain concentration and has acidity of 0.3mol/L, and is conveyed to a reaction kettle through a pump; adding ammonium sulfate into the reaction kettle in a screw conveying mode until the concentration of the ammonium sulfate is 2g/mL, and introducing liquid ammonia of a liquid ammonia station to adjust the pH of the solution to about 7.5; filtering the solution by an anode filter to remove ferric hydroxide, and backwashing the solution once every two days by using sulfuric acid with acidity of 55;
(3) The filtered solution enters a cooling kettle to cool the solution to-5 ℃ so as to crystallize ammonium persulfate; introducing the material liquid containing the crystals into a centrifuge for separation to obtain ammonium persulfate crystals, and circularly introducing the mother liquid into an electrolytic tank to be used as anolyte for electrolysis; and (5) drying the ammonium persulfate crystal by a 95 ℃ fluidized bed dryer to obtain a product, and weighing and packaging after the product is inspected to be qualified.
3. The salt and temperature resistant oilfield fracturing fluid thickener of claim 2, wherein the liquid ammonia used in the production process is liquid ammonia from an internal liquid ammonia station.
4. The salt-resistant and temperature-resistant oilfield fracturing fluid thickener according to claim 2, wherein the oxidation method is characterized in that 28% of hydrogen peroxide by mass is adopted, the addition amount is 13%, and the time is 3 hours.
5. The brine resistant and temperature resistant oilfield fracturing fluid thickener of claim 2, wherein the fluidized hot air drying is at a temperature of 140 ℃ for 30 seconds.
6. The brine resistant and temperature resistant oilfield fracturing fluid thickener of claim 2, wherein the centrifugal separation is at a rotational speed of 2600r/min.
7. The salt-tolerant and temperature-tolerant oilfield fracturing fluid thickener of claim 1, wherein the sodium bisulphite preparation method comprises the following steps:
1) Removing impurities from the modified calcium sulfite; adding modified calcium sulfite into water, and stirring to prepare a suspension with the concentration of 36%; adjusting the concentration of sulfuric acid to 4mol/L, and dissolving mirabilite in the sulfuric acid solution with adjusted concentration;
2) Adding the sulfuric acid solution dissolved with mirabilite into the modified calcium sulfite suspension by adopting a dropwise adding mode at 35 ℃, stirring at a rotating speed of 130r/min, stopping the reaction after the dropwise adding is finished and continuing to react for 65min, and obtaining sodium bisulfate solution by filter pressing or reduced pressure suction filtration;
3) Continuously adding modified calcium sulfite into the prepared sodium bisulfite solution to prepare a suspension with the concentration of the modified calcium sulfite being 33%, then continuously dropwise adding a sulfuric acid solution in which mirabilite is dissolved at 35 ℃, stirring at the speed of 130r/min, stopping the reaction after the dropwise adding is finished for continuously reacting for 65min, and obtaining the sodium bisulfite solution through pressure filtration or reduced pressure suction filtration.
8. The salt and temperature resistant oilfield fracturing fluid thickener of claim 7, wherein the molar ratio of modified calcium sulfite, sodium sulfate and sulfuric acid is 1:2:1.
9. the salt-tolerant and temperature-tolerant oilfield fracturing fluid thickener of claim 7, wherein the prepared sodium bisulfite solution can be directly used or sodium bisulfite solids can be prepared through the procedures of evaporation, cooling, crystallization and drying.
10. The salt-tolerant and temperature-tolerant oilfield fracturing fluid thickener according to claim 7, wherein the gypsum generated after the reaction is washed, dried and calcined to prepare semi-hydrated gypsum or anhydrous gypsum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310795536.6A CN117004381A (en) | 2023-06-30 | 2023-06-30 | Salt-resistant and temperature-resistant oilfield fracturing fluid thickener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310795536.6A CN117004381A (en) | 2023-06-30 | 2023-06-30 | Salt-resistant and temperature-resistant oilfield fracturing fluid thickener |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117004381A true CN117004381A (en) | 2023-11-07 |
Family
ID=88564544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310795536.6A Pending CN117004381A (en) | 2023-06-30 | 2023-06-30 | Salt-resistant and temperature-resistant oilfield fracturing fluid thickener |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117004381A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104773885A (en) * | 2015-03-26 | 2015-07-15 | 潍坊特钢集团有限公司 | Comprehensive treatment method of coking desulfurization waste liquid |
| CN106219577A (en) * | 2016-08-09 | 2016-12-14 | 石河子大学 | A kind of method utilizing smoke-gas wet desulfurization intermediate product calcium sulfite to prepare sodium sulfite |
| CN106433600A (en) * | 2016-09-05 | 2017-02-22 | 中国石油天然气集团公司 | Seawater-based thickening agent for fracturing as well as preparation method and application thereof |
| CN108149274A (en) * | 2017-11-16 | 2018-06-12 | 铜陵泰富特种材料有限公司 | The method of novel ammonium sulfate production sodium peroxydisulfate |
| CN109734106A (en) * | 2019-03-22 | 2019-05-10 | 石河子大学 | A method of high concentration solution of sodium bisulfite is prepared using trade waste |
| CN110483687A (en) * | 2019-08-08 | 2019-11-22 | 北京九恒质信能源技术有限公司 | Fracturing fluid thickener and preparation method thereof |
| CN114940894A (en) * | 2022-07-26 | 2022-08-26 | 山东诺尔生物科技有限公司 | Star-shaped temperature-resistant fracturing fluid thickening agent and preparation method thereof |
-
2023
- 2023-06-30 CN CN202310795536.6A patent/CN117004381A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104773885A (en) * | 2015-03-26 | 2015-07-15 | 潍坊特钢集团有限公司 | Comprehensive treatment method of coking desulfurization waste liquid |
| CN106219577A (en) * | 2016-08-09 | 2016-12-14 | 石河子大学 | A kind of method utilizing smoke-gas wet desulfurization intermediate product calcium sulfite to prepare sodium sulfite |
| CN106433600A (en) * | 2016-09-05 | 2017-02-22 | 中国石油天然气集团公司 | Seawater-based thickening agent for fracturing as well as preparation method and application thereof |
| CN108149274A (en) * | 2017-11-16 | 2018-06-12 | 铜陵泰富特种材料有限公司 | The method of novel ammonium sulfate production sodium peroxydisulfate |
| CN109734106A (en) * | 2019-03-22 | 2019-05-10 | 石河子大学 | A method of high concentration solution of sodium bisulfite is prepared using trade waste |
| CN110483687A (en) * | 2019-08-08 | 2019-11-22 | 北京九恒质信能源技术有限公司 | Fracturing fluid thickener and preparation method thereof |
| CN114940894A (en) * | 2022-07-26 | 2022-08-26 | 山东诺尔生物科技有限公司 | Star-shaped temperature-resistant fracturing fluid thickening agent and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103951297A (en) | Preparation method of alpha type gypsum with ultrahigh strength | |
| CN111269145A (en) | Preparation method of acetamidine hydrochloride | |
| CN117004381A (en) | Salt-resistant and temperature-resistant oilfield fracturing fluid thickener | |
| CN111704149A (en) | Process for producing sodium bicarbonate | |
| CN102351245B (en) | Continuous production method for ammonium vanadate | |
| CN103880058B (en) | A kind of precipitated chalk production technique of falling magnesium increasing calcium | |
| CN111115674A (en) | Ground underground salt, alkali and calcium circulation green production method | |
| CN113371749A (en) | Method for treating calcium-containing sludge in semiconductor industry | |
| CN102367238A (en) | Method for synthesizing accelerator N,N-dicyclohexyl-2-benzothiazole sulfenamide | |
| CN106518840B (en) | A kind of synthetic method of 2- chlorothiophene -5- formic acid | |
| CN112850770B (en) | Comprehensive utilization method of waste liquid from ammonia-soda process alkali production | |
| CN104086398B (en) | A kind of method of oxalic acid waste liquid Separation and Recovery oxalic acid | |
| CN113604868A (en) | Method for preparing calcium sulfate by using calcium chloride | |
| CN103910651B (en) | Iminodiacetonitrile continuous crystallisation technique | |
| CN1396113A (en) | Process for continuously preparing big-crystal sodium (or potassium) fluosilicate | |
| CN1803582A (en) | Method and apparatus for continuous production of high-concentrated sodium hypochlorite | |
| CN108439451A (en) | The method for preparing precipitated calcium carbonate using ardealite | |
| CN102827104A (en) | Method for synthesizing rubber vulcanization accelerator CZ by two-step process by using sodium hypochlorite as oxidizer | |
| CN102838562A (en) | Method for synthesizing rubber vulcanization accelerator NS (N-tertiary butyl-2-benzothiazole sulfenamide) through two-step method by taking hydrogen peroxide as oxidant | |
| KR101148336B1 (en) | Gypsum and Method for manufacturing the same | |
| CN202953831U (en) | Heavy-alkali washing system | |
| CN105565349B (en) | Recycling method for leaf filter residues in aluminum oxide production | |
| CN104627974A (en) | Method for producing battery grade iron phosphate | |
| CN104401950B (en) | The device of a kind of phosphorus ore phosphoric acid coproduction silicofluoride made of stones and technique | |
| CN101935061A (en) | Method for removing impurity of mother liquid in preparation process of calcium carbonate crystal whisker |
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 |