CN115011324B - Multifunctional drag reducer convenient to use and slick water fracturing fluid prepared from same - Google Patents
Multifunctional drag reducer convenient to use and slick water fracturing fluid prepared from same Download PDFInfo
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- CN115011324B CN115011324B CN202210814144.5A CN202210814144A CN115011324B CN 115011324 B CN115011324 B CN 115011324B CN 202210814144 A CN202210814144 A CN 202210814144A CN 115011324 B CN115011324 B CN 115011324B
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 109
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 239000012530 fluid Substances 0.000 title claims abstract description 48
- 239000000654 additive Substances 0.000 claims abstract description 22
- 238000002156 mixing Methods 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 19
- 239000002612 dispersion medium Substances 0.000 claims description 29
- 239000003381 stabilizer Substances 0.000 claims description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 16
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 14
- 239000004927 clay Substances 0.000 claims description 14
- 239000003112 inhibitor Substances 0.000 claims description 14
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 10
- 239000002131 composite material Substances 0.000 claims description 10
- 239000002270 dispersing agent Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 239000000725 suspension Substances 0.000 claims description 10
- 239000002202 Polyethylene glycol Substances 0.000 claims description 9
- 229920002401 polyacrylamide Polymers 0.000 claims description 9
- 229920001223 polyethylene glycol Polymers 0.000 claims description 9
- -1 sorbitol fatty acid ester Chemical class 0.000 claims description 9
- 230000000996 additive effect Effects 0.000 claims description 8
- 230000001804 emulsifying effect Effects 0.000 claims description 8
- 239000000839 emulsion Substances 0.000 claims description 8
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims description 8
- 239000004094 surface-active agent Substances 0.000 claims description 8
- 239000002562 thickening agent Substances 0.000 claims description 8
- 235000019270 ammonium chloride Nutrition 0.000 claims description 7
- 239000005543 nano-size silicon particle Substances 0.000 claims description 7
- 235000012239 silicon dioxide Nutrition 0.000 claims description 7
- 239000000375 suspending agent Substances 0.000 claims description 7
- 229920003169 water-soluble polymer Polymers 0.000 claims description 6
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 claims description 5
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 5
- 239000003995 emulsifying agent Substances 0.000 claims description 5
- 239000000194 fatty acid Substances 0.000 claims description 5
- 229930195729 fatty acid Natural products 0.000 claims description 5
- 230000005764 inhibitory process Effects 0.000 claims description 5
- 239000001103 potassium chloride Substances 0.000 claims description 5
- 235000011164 potassium chloride Nutrition 0.000 claims description 5
- 239000000600 sorbitol Substances 0.000 claims description 5
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims description 4
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims description 4
- NWGKJDSIEKMTRX-AAZCQSIUSA-N Sorbitan monooleate Chemical group CCCCCCCC\C=C/CCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O NWGKJDSIEKMTRX-AAZCQSIUSA-N 0.000 claims description 4
- 125000000129 anionic group Chemical group 0.000 claims description 4
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 36
- 238000002360 preparation method Methods 0.000 abstract description 10
- 238000011161 development Methods 0.000 abstract description 3
- 239000003795 chemical substances by application Substances 0.000 description 15
- 239000007788 liquid Substances 0.000 description 15
- 230000002579 anti-swelling effect Effects 0.000 description 7
- 230000002265 prevention Effects 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 230000008961 swelling Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 238000012795 verification Methods 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 229910001629 magnesium chloride Inorganic materials 0.000 description 2
- 239000002480 mineral oil Substances 0.000 description 2
- 235000010446 mineral oil Nutrition 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000003899 bactericide agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006664 bond formation reaction Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002195 soluble material Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- 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
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- 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
- C09K8/607—Compositions for stimulating production by acting on the underground formation specially adapted for clay formations
- C09K8/608—Polymer compositions
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- 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
- C09K8/665—Compositions based on water or polar solvents containing inorganic compounds
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- 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
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- 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
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- 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
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- 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
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- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention discloses a multifunctional friction reducer convenient to use and a slickwater fracturing fluid prepared from the same, relates to the technical field of oil and gas development, and solves the technical problems of difficult construction, difficult management and disordered construction site caused by the fact that a plurality of additives are required to be added simultaneously in a construction site to meet the requirements of various performance indexes of the fracturing fluid; the multifunctional resistance reducing agent comprises the following raw materials: the water-based fracturing fluid is prepared by mixing a multifunctional resistance reducing agent and water; the multifunctional resistance reducing agent provided by the invention is a multifunctional prefabricated product which is prepared into a single-dose multiple-effect product, so that the multifunctional resistance reducing agent is convenient to use on site, and can be directly added into water for mixing during on-site application, the preparation operation is simple and convenient, and the problems of difficult construction, difficult management and disordered construction site caused by the fact that various additives are required to be added in an on-line mixing mode in order to meet the requirements of various performance indexes of fracturing fluid on a construction site are solved.
Description
Technical Field
The invention relates to the technical field of oil gas development, in particular to the technical field of slick water fracturing fluid.
Background
The hydraulic fracturing modification reservoir yield increasing technology is the most main, effective and widely applied technical means for unconventional oil and gas development, and has the characteristics of large liquid amount and large discharge capacity. Therefore, the working fluid is prepared on site by adopting an online slickwater fracturing fluid preparation technology. The slick water fracturing fluid has the performance index requirements of resistance reduction, expansion prevention, drainage assistance, sterilization, gel breaking and demulsification, and the main chemical additives are added to meet the index requirements: resistance reducers, anti-swelling agents, cleanup additives, bactericides, gel breakers, demulsifiers and the like.
The field use of multiple chemical additives improves the demands and the quantity of field goods sites, adding equipment and pipeline equipment, generally causes the disorder of the material stacking, pipeline connection and adding equipment arrangement environments of a field liquid preparation area, and in addition, the use of the multiple chemical additives in the field liquid preparation is difficult to quickly adjust when the displacement is switched and the adding proportion is changed. Therefore, the on-line mixed slickwater fracturing fluid has the problems of more construction materials, difficult layout, difficult control and messy field construction and is not convenient enough.
Disclosure of Invention
The invention aims at: in order to solve the technical problems of difficult construction, difficult management and disordered construction site caused by adding various additives at the same time in order to meet the requirements of various performance indexes of the fracturing fluid in the construction site, the invention provides the multifunctional resistance reducing agent convenient to use and the slickwater fracturing fluid prepared by the multifunctional resistance reducing agent.
The invention adopts the following technical scheme for realizing the purposes:
a multifunctional resistance reducing agent convenient to use comprises the following raw materials: a water-based dispersion medium, a friction reducer, a suspension dispersant, at least one of a clay stabilizer and a cleanup additive; the application method of the multifunctional resistance reducing agent is that the multifunctional resistance reducing agent is directly added into water for mixing.
Preferably, the method comprises the following raw materials: 10-20% of water-based dispersion medium, 60-70% of resistance reducing agent, 15-25% of clay stabilizer and 1-3% of suspension dispersing agent; the application method of the multifunctional resistance reducing agent is that the multifunctional resistance reducing agent is directly added into water for mixing.
Preferably, the method comprises the following raw materials: 5-10% of water-based dispersion medium, 80-90% of resistance reducing agent, 2-10% of cleanup additive and 1-3% of suspension dispersing agent; the application method of the multifunctional resistance reducing agent is that the multifunctional resistance reducing agent is directly added into water for mixing.
Preferably, the method comprises the following raw materials: 10-20% of water-based dispersion medium, 60-70% of resistance reducing agent, 15-25% of clay stabilizer, 2-10% of discharge assisting agent and 1-3% of suspension dispersing agent.
Preferably, the aqueous dispersion medium is a water-based dispersion medium of an inhibition emulsion prepared by using 10% by mass of sorbitol fatty acid ester as an emulsifier, 40% by mass of low molecular weight polyethylene glycol as an inhibitor, and 50% by mass of water.
Preferably, the resistance reducing agent comprises the following raw materials, by mass, 25-45% of water, 15-35% of a composite inhibitor, 5-15% of a temperature-resistant stabilizer, 1-3% of an emulsifying thickener, 0.2-1.5% of a temperature-resistant suspending agent and 15-45% of a water-soluble polymer.
Preferably, the clay stabilizer is a complex salt of ammonium chloride and potassium chloride.
Preferably, the emission aid is a fluorocarbon surfactant.
Preferably, the suspension dispersant is nano silica.
A slick water fracturing fluid is prepared by mixing any one of the multifunctional resistance reducing agents with water, wherein the mass ratio of the multifunctional resistance reducing agents is 0.1% -0.3%.
The beneficial effects of the invention are as follows:
1. the multifunctional resistance reducing agent is characterized in that the self-dispersing clean instant resistance reducing agent is adopted, water is used as a water-based dispersion medium, and a water-soluble anti-swelling agent and a drainage assisting agent are added into the self-dispersing clean instant resistance reducing agent to prepare a uniform and stable product system, so that the resistance reducing performance, the anti-swelling performance and the drainage assisting performance are combined into a whole, a multi-effect integrated product is formed, and the multifunctional resistance reducing agent is directly applied on site.
2. The multifunctional resistance reducing agent provided by the invention is a multifunctional prefabricated product which is prepared into a single-dose multiple-effect product, so that the multifunctional resistance reducing agent is convenient to use on site, and can be directly added into water for mixing during on-site application, the preparation operation is simple and convenient, and the problems of difficult construction, difficult management and disordered construction site caused by the fact that various additives are required to be added in an on-line mixing mode in order to meet the requirements of various performance indexes of fracturing fluid on a construction site are solved.
3. Because the resistance reducing agent raw materials, the anti-swelling agent and the cleanup additive are all water-soluble materials, the solubility of the resistance reducing agent raw materials in the traditional dispersion medium of mineral oil and organic solvent is very small or indissolvable, and therefore, compared with the traditional resistance reducing agent taking the mineral oil and the organic solvent as the dispersion medium, the multifunctional resistance reducing agent has better function integration feasibility, product stability and product uniformity.
4. The comprehensive performance of the multifunctional resistance reducing agent provided by the invention not only meets the single agent standard of the resistance reducing agent, but also meets the requirement of site construction on the anti-swelling and drainage-assisting performance of slickwater, and when the multifunctional resistance reducing agent is used, the requirements of the anti-swelling performance index and drainage-assisting performance index of slickwater fracturing fluid can be met by only adding the multifunctional resistance reducing agent, and the requirements of the slickwater fracturing fluid on the anti-swelling performance index and the drainage-assisting performance index can be met without adding various agents on site, so that the investment and use of equipment and pipelines are reduced, the requirements on equipment and personnel are reduced, and the site construction is more orderly, smooth and standardized to operate.
Drawings
FIG. 1 is an external view showing the multifunctional friction reducer products of examples 1, 2 and 3 of the present invention;
FIG. 2 is an external view of a slickwater fracturing fluid formulated in example 9 of the present invention;
FIG. 3 is a drawing showing the appearance of a sand-carrying fluid of a slickwater fracturing fluid formulated in example 9 of the present invention;
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments.
Example 1
The embodiment provides a multifunctional resistance reducing agent convenient to use, which has the properties of resistance reduction and expansion prevention, and the raw materials comprise: 15% by mass of water-based dispersion medium, 65% by mass of liquid friction reducer, 18% by mass of clay stabilizer (ammonium chloride and potassium chloride in a mass ratio of 4:1) and 2% by mass of nano silicon dioxide.
Wherein, the water-based dispersion medium is an inhibition type emulsion water-based dispersion medium which is prepared by taking 10% of sorbitol fatty acid ester by mass ratio as an emulsifier, 40% of low molecular weight polyethylene glycol by mass ratio as an inhibitor and 50% of water.
The liquid resistance reducing agent comprises the following raw materials in percentage by mass: 35% of water, 20% of a composite inhibitor, 12% of polyethylene glycol (a temperature-resistant stabilizer), 2% of span 80 (an emulsifying thickener), 1% of hydroxyethyl cellulose (a temperature-resistant suspending agent), 30% of anionic polyacrylamide (a water-soluble polymer) and the molecular weight of 2000 ten thousand, wherein the composite inhibitor is prepared from ammonium chloride and potassium chloride in a mass ratio of 4:1. The liquid resistance reducing agent is a low-carbon self-dispersing cleaning instant resistance reducing agent, water is used as a dispersion medium, an emulsifying thickener is used as a water-based emulsion formed by an emulsion stabilizer, and a composite inhibitor, namely high-concentration ammonium and potassium composite salt, is added into water to form high cationic charges in the water, so that the electrolytic balance of the water is changed, the number of active hydrogen ions is reduced, the hydrolysis of modified polyacrylamide is inhibited, the modified polyacrylamide can swell in the water to cause the system to lose fluidity, and the main reason that the polyacrylamide can swell in the water is that a large number of active hydrogen ions exist in the water to cause the polyacrylamide to swell through hydrogen bond formation by hydrolysis; meanwhile, a temperature-resistant stabilizer is added into the system, which belongs to hydrophilic and nonpolar weak electrolyte, has the characteristic that the electrolytic balance is insensitive to temperature influence, and can inhibit the influence of temperature fluctuation on the concentration of hydrogen ions in the water-based emulsion dispersion medium; in addition, the temperature-resistant suspending agent and the emulsifying thickener are added into the system, so that the stability of the system is improved, and the precipitation of the resistance reducing agent raw material modified polyacrylamide is prevented. The system belongs to a high-concentration electrolyte system, has the density greater than that of water, can naturally sink when being added into the water, and generates concentration difference and high chemical potential energy by electrolyte dissolution and diffusion in the sinking process, so that the system is promoted to diffuse to a low-concentration area, and the product has self-dispersing effect in the water.
According to the embodiment, the clay stabilizer is compounded in the liquid resistance reducing agent, so that the resistance reducing agent has the properties of resistance reduction and expansion resistance, the single-agent standard of the resistance reducing agent is met, the requirement of site operation on the expansion resistance of slickwater is met, the requirement of the slickwater fracturing fluid on the resistance reducing performance index and the expansion resistance index can be met only by adding the multifunctional resistance reducing agent, and the requirement of the slickwater fracturing fluid on the resistance reducing performance index and the expansion resistance index can be met without adding various agents on site, so that the investment and the use of equipment and pipelines are reduced, the requirement on equipment and personnel is reduced, and the site operation is more orderly, smooth and standardized.
The preparation method of the multifunctional resistance reducing agent comprises the following steps: adding a water-based dispersion medium, nano silicon dioxide and a clay stabilizer into a reaction kettle in sequence, stirring uniformly to form a dispersion system, adding a liquid resistance reducing agent, stirring uniformly, and finally preparing a multi-functional prefabricated product with one agent and multiple effects, so that the multifunctional prefabricated product is convenient for on-site use, and can be directly added into water for mixing when being used on-site.
Example 2
The embodiment provides a multifunctional resistance reducing agent convenient to use, which has the performance of 'resistance reduction and discharge assisting', and the raw materials comprise: 5% of water-based dispersion medium, 90% of liquid friction reducer, 4% of fluorocarbon surfactant and 1% of nano silicon dioxide.
Wherein the water-based dispersion medium is an inhibition type emulsion water-based dispersion medium prepared by taking 10% of sorbitol fatty acid ester as an emulsifier, 40% of low molecular weight polyethylene glycol as an inhibitor and 50% of water.
The liquid resistance reducing agent comprises the following raw materials in percentage by mass: 35% of water, 20% of a composite inhibitor, 12% of polyethylene glycol (a temperature-resistant stabilizer), 2% of span 80 (an emulsifying thickener), 1% of hydroxyethyl cellulose (a temperature-resistant suspending agent), 30% of anionic polyacrylamide (a water-soluble polymer) and the molecular weight of 2000 ten thousand, wherein the composite inhibitor is ammonium chloride and magnesium chloride, and the mass ratio is 1:3.
The fluorocarbon surfactant used in this example was fluorocarbon surfactant 3721 of Shanghai Fufield chemical technology Co., ltd.
According to the embodiment, the resistance reducing agent is endowed with the performance of 'resistance reducing and discharge assisting', namely the resistance reducing agent is compounded with the resistance assisting agent, so that the resistance reducing agent meets the single-agent standard of the resistance reducing agent, and meets the requirement of site construction on the discharge assisting performance of slickwater.
The preparation method of the multifunctional resistance reducing agent comprises the following steps: adding a water-based dispersion medium and nano silicon dioxide into a reaction kettle in sequence, stirring uniformly to form a dispersion system, then adding a liquid resistance reducing agent and a cleanup additive into the reaction kettle in sequence, stirring uniformly, and finally preparing a multifunctional prefabricated product with multiple effects, so that the multifunctional prefabricated product is convenient for on-site use, and directly adding the multifunctional prefabricated product into water for mixing when the multifunctional prefabricated product is used on site.
Example 3
The embodiment provides a multifunctional resistance reducing agent convenient to use, which has the properties of resistance reduction, expansion prevention and drainage assisting, and comprises the following raw materials: 15% by mass of water-based dispersion medium, 63% by mass of liquid friction reducer, 17% by mass of clay stabilizer (ammonium chloride and potassium chloride in a mass ratio of 4:1), 3% by mass of fluorocarbon surfactant and 2% by mass of nano silicon dioxide.
Wherein the water-based dispersion medium is an inhibition type emulsion water-based dispersion medium prepared by taking 10% of sorbitol fatty acid ester as an emulsifier, 40% of low molecular weight polyethylene glycol as an inhibitor and 50% of water.
The liquid resistance reducing agent comprises the following raw materials in percentage by mass: 35% of water, 20% of a composite inhibitor, 12% of polyethylene glycol (a temperature-resistant stabilizer), 2% of span 80 (an emulsifying thickener), 1% of hydroxyethyl cellulose (a temperature-resistant suspending agent), 30% of anionic polyacrylamide (a water-soluble polymer) and the molecular weight of 2000 ten thousand, wherein the composite inhibitor is ammonium chloride and magnesium chloride, and the mass ratio is 1:3.
The fluorocarbon surfactant used in this example was fluorocarbon surfactant 3721 of Shanghai Fufield chemical technology Co., ltd.
According to the embodiment, the clay stabilizer and the emission assisting agent are compounded in the liquid resistance reducing agent, so that the resistance reducing agent is endowed with the performances of resistance reducing, expansion preventing and emission assisting, the single agent standard of the resistance reducing agent is met, the requirement of site construction on the expansion preventing and emission assisting performance of slickwater is met, and when the multifunctional resistance reducing agent is used, the requirements of the performance indexes of the slickwater fracturing fluid for resistance reduction, the performance indexes of expansion preventing and the performance indexes of emission assisting can be met by only adding the multifunctional resistance reducing agent, and the requirements of the equipment and the personnel are reduced, so that the site construction is more orderly, smooth and standardized to operate.
The preparation method of the multifunctional resistance reducing agent comprises the following steps: adding a water-based dispersion medium, nano silicon dioxide and a clay stabilizer into a reaction kettle in sequence, stirring uniformly to form a dispersion system, then adding a liquid resistance reducing agent and a discharge assisting agent into the reaction kettle in sequence, stirring uniformly, and finally preparing a multi-functional prefabricated product with multiple effects, so that the multifunctional prefabricated product is convenient for on-site use, and directly adding the multifunctional prefabricated product into water for mixing when the multifunctional prefabricated product is used on site.
Example 4
The embodiment provides a slickwater fracturing fluid, which is prepared by adding 0.20% of the multifunctional resistance reducing agent with the mass ratio of 'resistance reduction and expansion prevention' in the embodiment 1 into water for mixing, has simple and convenient preparation operation, and solves the problems of difficult construction, difficult management and disordered construction site caused by the fact that a plurality of additives are required to be added simultaneously in order to meet the requirements of various performance indexes of the fracturing fluid on a construction site.
Example 5
The embodiment provides a slickwater fracturing fluid, which is prepared by adding the multifunctional resistance reducing agent with the mass ratio of 0.30% and the multifunctional resistance reducing agent with the mass ratio of 1, wherein the on-site preparation operation is simple and convenient, and the problems of difficult construction, difficult management and disordered construction site caused by the fact that a plurality of additives are required to be added simultaneously in order to meet the requirements of various performance indexes of the fracturing fluid on the construction site are solved.
Example 6
The embodiment provides a slickwater fracturing fluid, which is prepared by adding 0.10% of the multifunctional resistance reducing agent with the mass ratio of 'resistance reduction plus drainage assisting' in the embodiment 2 into water for mixing, is simple and convenient to prepare and operate on site, and solves the problems of difficult construction, difficult management and disordered construction site caused by the fact that various additives are required to be added simultaneously in order to meet the requirements of various performance indexes of the fracturing fluid on the construction site.
Example 7
The embodiment provides a slickwater fracturing fluid, which is prepared by adding 0.15% of the multifunctional resistance reducing agent with the mass ratio of 'resistance reduction plus drainage assisting' in the embodiment 2 into water for mixing, is simple and convenient to prepare and operate on site, and solves the problems of difficult construction, difficult management and disordered construction site caused by the fact that various additives are required to be added simultaneously in order to meet the requirements of various performance indexes of the fracturing fluid on the construction site.
Example 8
The embodiment provides a slickwater fracturing fluid, which is prepared by adding 0.2% of the multifunctional resistance reducing agent with the mass ratio of 'resistance reduction + expansion prevention + drainage assisting' in the embodiment 3 into water for mixing, is simple and convenient to prepare and operate on site, and solves the problems of difficult construction, difficult management and disordered construction site caused by the fact that various additives are required to be added simultaneously in order to meet the requirements of various performance indexes of the fracturing fluid on the construction site.
Example 9
The embodiment provides a slickwater fracturing fluid, which is prepared by adding 0.3% of the multifunctional resistance reducing agent with the mass ratio of 'resistance reduction + expansion prevention + drainage assisting' in the embodiment 3 into water for mixing, is simple and convenient to prepare and operate on site, and solves the problems of difficult construction, difficult management and disordered construction site caused by the fact that various additives are required to be added simultaneously in order to meet the requirements of various performance indexes of the fracturing fluid on the construction site.
Performance verification
1. Performance of various embodiments of the multifunctional resistance-reducing agent product
According to the requirements of industry standards (NB/T14003.2-2016 shale gas fracturing fluid, part 2: resistance reducing agent performance indexes and test methods), performance verification is carried out on the multifunctional resistance reducing agent products of the examples 1-3, and detection results of all indexes meet the requirements, and are shown in the table one.
Table I, examples 1-3 multifunctional resistance-reducing agent product Performance
2. Slick water fracturing fluid performance prepared from multifunctional resistance reducing agent product
According to the technical requirements of corresponding indexes in industry standards (NB/T14003.1-2015 shale gas fracturing fluid, part 1: slickwater performance indexes and evaluation methods), performance verification is carried out on fracturing fluid prepared by the multifunctional resistance reducing agent products of examples 4-9, and detection results of all indexes meet the requirements, and are specifically shown in a table II.
Table II, performance of slick fracturing fluid prepared from multifunctional friction reducer products of examples 4-9
In Table II, the resistivity reflects the resistivity of the slickwater fracturing fluid, the surface tension, interfacial tension and drainage rate reflect the drainage assisting performance of the slickwater fracturing fluid, and the CST ratio reflects the swelling preventing performance of the slickwater fracturing fluid. According to the detection result of the slickwater performance, the performance of the slickwater fracturing fluid (examples 4-9) prepared by adopting the multifunctional resistance reducing agent products (examples 1-3) with corresponding performances after direct dissolution meets the corresponding index requirements.
From Table II, the slickwater fracturing fluids of examples 4 and 5 are prepared by dissolving example 1 (the multifunctional resistance reducing agent of 'resistance reducing + drainage assisting') in water, and the resistance reducing rate and the CST ratio meet the index requirements, so that the multifunctional purpose of 'resistance reducing + swelling preventing' is achieved, and the resistance reducing performance and the swelling preventing performance are good.
The slickwater fracturing fluids of examples 6 and 7 are prepared by dissolving example 2 (the multifunctional resistance reducing agent with resistance reducing and drainage assisting) in water, and the resistance reducing rate, the surface tension, the interfacial tension and the drainage rate all meet the requirements, which shows that the multifunctional purpose of resistance reducing and drainage assisting is achieved, and the resistance reducing performance and the drainage assisting performance are good.
The slickwater fracturing fluid of examples 8 and 9 is prepared by dissolving example 3 (the multifunctional resistance reducing agent of ' resistance reducing + swelling preventing + drainage assisting ') in water, and indexes of resistance reducing rate, surface tension, interfacial tension, CST ratio and drainage rate all meet standard requirements, so that the multifunctional resistance reducing + swelling preventing + drainage assisting ' is achieved, and the multifunctional resistance reducing, swelling preventing and drainage assisting performances are good.
Claims (9)
1. The multifunctional resistance reducing agent convenient to use is characterized by comprising the following raw materials: a water-based dispersion medium, a friction reducer, a suspension dispersant, at least one of a clay stabilizer and a cleanup additive; the application method of the multifunctional resistance reducing agent comprises the steps of directly adding the multifunctional resistance reducing agent into water for mixing;
the resistance reducing agent comprises, by mass, 25-45% of water, 15-35% of a composite inhibitor, 5-15% of a temperature-resistant stabilizer, 1-3% of an emulsifying thickener, 0.2-1.5% of a temperature-resistant suspending agent and 15-45% of a water-soluble polymer;
the water-soluble polymer is anionic polyacrylamide with the molecular weight of 2000 ten thousand;
the temperature-resistant stabilizer is polyethylene glycol, the emulsifying thickener is span 80, and the temperature-resistant suspending agent is hydroxyethyl cellulose.
2. The multifunctional drag reducer convenient to use according to claim 1, which is characterized by comprising the following raw materials: 10-20% by mass of water-based dispersion medium, 60-70% by mass of resistance reducing agent, 15-25% by mass of clay stabilizer and 1-3% by mass of suspension dispersing agent; the application method of the multifunctional resistance reducing agent is that the multifunctional resistance reducing agent is directly added into water for mixing.
3. The multifunctional drag reducer convenient to use according to claim 1, which is characterized by comprising the following raw materials: 5-10% of water-based dispersion medium, 80-90% of resistance reducing agent, 2-10% of cleanup additive and 1-3% of suspension dispersing agent; the application method of the multifunctional resistance reducing agent is that the multifunctional resistance reducing agent is directly added into water for mixing.
4. The multifunctional drag reducer convenient to use according to claim 1, which is characterized by comprising the following raw materials: 10-20% of water-based dispersion medium, 60-70% of resistance reducing agent, 15-25% of clay stabilizer, 2-10% of cleanup additive and 1-3% of suspension dispersing agent.
5. The multifunctional drag reducing agent for convenient use according to claim 1, wherein the water-based dispersion medium is an inhibition type emulsion dispersion medium prepared by using 10% by mass of sorbitol fatty acid ester as an emulsifier, 40% by mass of low molecular weight polyethylene glycol as an inhibitor and 50% by mass of water.
6. The convenient-to-use multifunctional resistance reducing agent according to claim 1, wherein the clay stabilizer is a compound salt of ammonium chloride and potassium chloride.
7. The convenient-to-use multifunctional friction reducer of claim 1, wherein the cleanup additive is a fluorocarbon surfactant.
8. The convenient-to-use multifunctional friction reducer according to claim 1, wherein the suspension dispersant is nano silicon dioxide.
9. The slick water fracturing fluid is characterized by being prepared by mixing the multifunctional resistance reducing agent according to any one of claims 1-8 with water, wherein the mass ratio of the multifunctional resistance reducing agent is 0.1% -0.3%.
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| CN116179180A (en) * | 2023-03-09 | 2023-05-30 | 四川申和新材料科技有限公司 | Clean concentrated fracturing fluid based on water-soluble polymer |
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| CN103952133A (en) * | 2013-12-10 | 2014-07-30 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Resistance reducing agent for fracturing fluid and preparation method thereof |
| CN106497538A (en) * | 2016-10-25 | 2017-03-15 | 长江大学 | Drag reduction, the row of helping and clay stabilization " three-in-one " slippery water concentrate system without oil phase |
| CN113736443A (en) * | 2021-09-24 | 2021-12-03 | 四川省威沃敦化工有限公司 | Low-carbon environment-friendly multifunctional drag reducer for fracturing and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103952133A (en) * | 2013-12-10 | 2014-07-30 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Resistance reducing agent for fracturing fluid and preparation method thereof |
| CN106497538A (en) * | 2016-10-25 | 2017-03-15 | 长江大学 | Drag reduction, the row of helping and clay stabilization " three-in-one " slippery water concentrate system without oil phase |
| CN113736443A (en) * | 2021-09-24 | 2021-12-03 | 四川省威沃敦化工有限公司 | Low-carbon environment-friendly multifunctional drag reducer for fracturing and preparation method thereof |
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