CN115011324A - Multifunctional resistance reducing agent convenient to use and slickwater fracturing fluid prepared from same - Google Patents
Multifunctional resistance reducing agent convenient to use and slickwater fracturing fluid prepared from same Download PDFInfo
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 100
- 239000012530 fluid Substances 0.000 title claims abstract description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 70
- 239000000654 additive Substances 0.000 claims abstract description 27
- 238000002156 mixing Methods 0.000 claims abstract description 18
- 239000002994 raw material Substances 0.000 claims abstract description 17
- 239000002612 dispersion medium Substances 0.000 claims description 31
- 239000003381 stabilizer Substances 0.000 claims description 21
- 239000003112 inhibitor Substances 0.000 claims description 16
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 14
- 230000000996 additive effect Effects 0.000 claims description 14
- 239000004927 clay Substances 0.000 claims description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 13
- 239000002131 composite material Substances 0.000 claims description 13
- 239000000839 emulsion Substances 0.000 claims description 12
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 10
- 239000002270 dispersing agent Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 239000002202 Polyethylene glycol Substances 0.000 claims description 8
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims description 8
- 229920001223 polyethylene glycol Polymers 0.000 claims description 8
- 239000004094 surface-active agent Substances 0.000 claims description 8
- 235000019270 ammonium chloride Nutrition 0.000 claims description 7
- -1 sorbitol fatty acid ester Chemical class 0.000 claims description 7
- 239000002562 thickening agent Substances 0.000 claims description 7
- 239000000375 suspending agent Substances 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
- 229920003169 water-soluble polymer Polymers 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 39
- 238000002360 preparation method Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 6
- 238000011161 development Methods 0.000 abstract description 3
- 230000002579 anti-swelling effect Effects 0.000 description 24
- 239000007788 liquid Substances 0.000 description 16
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- 238000003756 stirring Methods 0.000 description 6
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- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 4
- 230000001804 emulsifying effect Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000005543 nano-size silicon particle Substances 0.000 description 4
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- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 3
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 3
- NWGKJDSIEKMTRX-AAZCQSIUSA-N Sorbitan monooleate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O NWGKJDSIEKMTRX-AAZCQSIUSA-N 0.000 description 3
- 125000000129 anionic group Chemical group 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
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- 239000001257 hydrogen Substances 0.000 description 3
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- 229910001629 magnesium chloride Inorganic materials 0.000 description 2
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- 238000012795 verification Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 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
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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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
- C09K8/602—Compositions for stimulating production by acting on the underground formation containing surfactants
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- C—CHEMISTRY; METALLURGY
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- 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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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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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
- C09K8/665—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
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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
- C09K8/90—Compositions based on water or polar solvents containing organic compounds macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
Abstract
The invention discloses a multifunctional resistance reducing agent 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 need of simultaneously adding various additives in order to meet the requirements of various performance indexes of the fracturing fluid on the construction site; the multifunctional resistance reducing agent comprises the following raw materials: the slickwater fracturing fluid is prepared by mixing a multifunctional resistance reducing agent and water; the multifunctional resistance reducing agent provided by the invention is prepared into a multifunctional prefabricated product with multiple effects, so that the multifunctional prefabricated product can be conveniently used on site, and can be directly added into water for mixing when being applied on site, 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 need to be mixed and added on line in order to meet the requirements of various performance indexes of fracturing fluid on the construction site are solved.
Description
Technical Field
The invention relates to the technical field of oil and gas development, in particular to the technical field of slickwater fracturing fluid.
Background
The hydraulic fracturing reformation reservoir production increasing technology is the most main, most effective and most widely applied technical means of unconventional oil and gas development, and has the characteristics of large liquid amount and large discharge capacity. Therefore, the technology of online preparation of slickwater fracturing fluid is mostly adopted for preparing the working fluid on site. The slickwater fracturing fluid has the performance index requirements of resistance reduction, expansion prevention, drainage assistance, sterilization, gel breaking and emulsion breaking, and main chemical additives are added for meeting the index requirements: resistance reducing agent, anti-swelling agent, discharge aiding agent, bactericide, gel breaker, demulsifier and the like.
The on-site use of multiple chemical additives improves the requirements and the quantity of on-site goods sites, adding equipment and pipeline equipment, generally causes the disorder of the material stacking, pipeline connection and adding equipment arrangement environment of an on-site liquid distribution area, and in addition, the use of the multiple chemical additives is difficult to rapidly adjust when the discharge capacity is switched and the adding proportion is changed during on-site liquid distribution. Therefore, the problems of more construction materials, difficult layout, difficult control, messy site and inconvenient site operation exist in the on-line mixed slickwater fracturing fluid field construction.
Disclosure of Invention
The invention aims to: the invention provides a multifunctional resistance reducing agent which is convenient to use and a slickwater fracturing fluid prepared from the multifunctional resistance reducing agent, and aims to solve the technical problems of difficult construction, difficult management and disordered construction sites caused by the fact that a plurality of additives are required to be added at the same time in order to meet the requirements of various performance indexes of the fracturing fluid on the construction sites.
The invention specifically adopts the following technical scheme for realizing the purpose:
a multifunctional resistance reducing agent convenient to use comprises the following raw materials: a water-based dispersion medium, a drag reducer, a suspending dispersant, and at least one of a clay stabilizer and a cleanup additive; the use method of the multifunctional resistance reducing agent is directly adding 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 dispersant; the use method of the multifunctional resistance reducing agent is directly adding 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 suspending dispersant; the use method of the multifunctional resistance reducing agent is directly adding 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 cleanup additive and 1-3% of suspending dispersant.
Preferably, the water-based dispersion medium is an inhibition type emulsion water-based dispersion medium which is prepared by taking 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, by mass, 25-45% of water, 15-35% of a composite inhibitor, 5-15% of a temperature-resistant stabilizer, 1-3% of an emulsion 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 cleanup additive is a fluorocarbon-based surfactant.
Preferably, the suspension dispersant is nano-silica.
The slickwater fracturing fluid is formed by mixing any one of the multifunctional resistance reducing agents and water, wherein the mass ratio of the multifunctional resistance reducing agent is 0.1-0.3%.
The invention has the following beneficial effects:
1. the multifunctional resistance reducing agent provided by the invention is characterized in that 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 discharge aiding agent are added into the water-based dispersion medium to prepare a uniform and stable product system, so that the resistance reducing performance, the anti-swelling performance and the discharge aiding performance are compounded into a whole, a multi-effect integrated product is formed, and the multifunctional resistance reducing agent is directly applied on site in a form of the multifunctional resistance reducing agent.
2. The multifunctional resistance reducing agent provided by the invention is prepared into a multifunctional prefabricated product with multiple effects, so that the multifunctional prefabricated product can be conveniently used on site, and can be directly added into water for mixing when being applied on site, 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 need to be mixed and added on line in order to meet the requirements of various performance indexes of fracturing fluid on the construction site are solved.
3. Because the raw materials of the resistance reducing agent, the anti-swelling agent and the cleanup additive are water-soluble materials, and the solubility of the resistance reducing agent in the traditional dispersion medium of mineral oil and organic solvent is very low or insoluble, the multifunctional resistance reducing agent takes water as the dispersion medium, and has better function integration feasibility, product stability and product uniformity compared with the traditional resistance reducing agent taking mineral oil and organic solvent as the dispersion medium.
4. The multifunctional resistance reducing agent provided by the invention has comprehensive performance, not only meets the single agent standard of the resistance reducing agent, but also meets the requirements of site construction on the anti-swelling and drainage-assisting performance of slickwater, and when in use, the product of the multifunctional resistance reducing agent is only needed to be added, so that the requirements of the anti-swelling performance index and drainage-assisting performance index of slickwater fracturing fluid can be met, multiple agents are not needed to be added on site, the investment and use of equipment and pipelines are reduced, the requirements on equipment and personnel are reduced, and the site construction is enabled to run orderly, smoothly and in a standardized manner.
Drawings
Fig. 1 is an external view of the multifunctional resistance 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 an appearance diagram of a sand-carrying fluid of slickwater fracturing fluid formulated in example 9 of the present invention;
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the embodiments, and it is obvious that the described embodiments are some, but not all embodiments of the present invention.
Example 1
The embodiment provides a multifunctional resistance reducing agent which is convenient to use, has the performances of resistance reduction and anti-swelling, and comprises the following raw materials: 15 percent of water-based dispersion medium, 65 percent of liquid resistance reducing agent, 18 percent of clay stabilizer (the mass ratio of ammonium chloride to potassium chloride is 4:1) and 2 percent of nano silicon dioxide.
Wherein the water-based dispersion medium is an inhibition type emulsion water-based dispersion medium prepared from 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.
The liquid resistance reducing agent comprises the following raw materials in percentage by mass: 35% of water, 20% of composite inhibitor, 12% of polyethylene glycol (temperature-resistant stabilizer), 2% of span 80 (emulsifying thickener), 1% of hydroxyethyl cellulose (temperature-resistant suspending agent) and 30% of anionic polyacrylamide (water-soluble polymer), wherein the molecular weight of the composite inhibitor is 2000 ten thousand, and the mass ratio of ammonium chloride to potassium chloride is 4: 1. The liquid resistance reducing agent is a low-carbon self-dispersion clean instant resistance reducing agent, water is used as a dispersion medium, an emulsion thickener is used as a water-based emulsion formed by an emulsion stabilizer, a composite inhibitor, namely high-concentration ammonium and potassium composite salt, is added into the water to form high cationic charge 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, so that the system loses fluidity, the main reason that the polyacrylamide can swell in the water is that a large number of active hydrogen ions exist in the water, so that the polyacrylamide can form hydrogen bonds through hydrolysis to swell, the hydrolysis of the modified polyacrylamide is inhibited, the fluidity of the system is good, and the prepared resistance reducing agent is uniform; meanwhile, a temperature-resistant stabilizer is added into the system, belongs to a hydrophilic and nonpolar weak electrolyte, has the characteristic that the electrolytic balance is insensitive to the temperature influence, and can inhibit the influence of temperature fluctuation on the hydrogen ion concentration of the water-based emulsion dispersion medium; in addition, a temperature-resistant suspending agent and an 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 of this application belongs to high concentration electrolyte system, and density is greater than water, and it adds and can sink naturally in aqueous, and the in-process electrolyte that sinks dissolves diffusion and produces concentration difference and high chemical potential energy impel the system to the regional diffusion of low concentration to make the product have the self dispersion effect in aqueous.
In the embodiment, the clay stabilizer is compounded in the liquid resistance reducing agent, so that the resistance reducing agent is endowed with the performances of resistance reduction and anti-swelling, the single agent standard of the resistance reducing agent is met, the requirement of site construction on the anti-swelling performance of slickwater is also met, the multifunctional resistance reducing agent provided by the invention is only required to be added during use, the requirements of the resistance reducing performance index and the anti-swelling performance index of the slickwater fracturing fluid can be met, multiple medicaments are not required to be added on site, the investment and use of equipment and pipelines are reduced, the requirements on equipment and personnel are reduced, and the site construction is enabled to be operated orderly, smoothly and in a standardized manner.
The preparation method of the multifunctional resistance reducing agent of the embodiment comprises the following steps: adding a water-based dispersion medium, nano-silica and a clay stabilizer into a reaction kettle in sequence, uniformly stirring to form a dispersion system, adding a liquid resistance reducing agent, and uniformly stirring to finally prepare a multi-functional prefabricated product with multiple effects for field use, and directly adding water for mixing when the product is used on the field.
Example 2
The embodiment provides a multifunctional resistance reducing agent which is convenient to use, has the performance of reducing resistance and assisting in discharging, and comprises the following raw materials: 5% of water-based dispersion medium, 90% of liquid resistance reducing agent, 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 by mass.
The liquid resistance reducing agent comprises the following raw materials in percentage by mass: 35% of water, 20% of composite inhibitor, 12% of polyethylene glycol (temperature-resistant stabilizer), 2% of span 80 (emulsifying thickener), 1% of hydroxyethyl cellulose (temperature-resistant suspending agent), 30% of anionic polyacrylamide (water-soluble polymer), and the molecular weight of the composite inhibitor is 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 from shanghai futian chemical technology co.
In the embodiment, the cleanup additive is compounded in the liquid drag reducer, so that the drag reducer is endowed with the performance of 'drag reduction + cleanup', the standard of a single drag reducer is met, the requirement of site construction on the drainage performance of slickwater is also met, the multifunctional drag reducer is only needed to be added during use, the requirements of the drag reduction performance index and the drainage performance index of slickwater fracturing fluid can be met, multiple medicaments are not needed to be added on site, the investment and use of equipment and pipelines are reduced, the requirements on equipment and personnel are reduced, and the site construction is enabled to run more orderly, smoothly and normatively.
The preparation method of the multifunctional resistance reducing agent of the embodiment comprises the following steps: adding a water-based dispersion medium and nano-silica into a reaction kettle in sequence, uniformly stirring to form a dispersion system, then adding a liquid resistance reducing agent and a discharge aiding agent in sequence, uniformly stirring, and finally preparing a multifunctional prefabricated product with multiple effects for on-site use.
Example 3
The embodiment provides a multifunctional resistance reducing agent which is convenient to use, has the performances of resistance reducing, anti-swelling and discharge assisting, and comprises the following raw materials: 15 percent of water-based dispersion medium, 63 percent of liquid resistance reducing agent, 17 percent of clay stabilizer (ammonium chloride and potassium chloride are in a mass ratio of 4:1), 3 percent of fluorocarbon surfactant and 2 percent 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 by mass.
The liquid resistance reducing agent comprises the following raw materials in percentage by mass: 35% of water, 20% of composite inhibitor, 12% of polyethylene glycol (temperature-resistant stabilizer), 2% of span 80 (emulsifying thickener), 1% of hydroxyethyl cellulose (temperature-resistant suspending agent), 30% of anionic polyacrylamide (water-soluble polymer), and the molecular weight of the composite inhibitor is 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 from shanghai futian chemical technology co.
According to the embodiment, the clay stabilizer and the cleanup additive are compounded in the liquid drag reducer, so that the drag reducer is endowed with the performances of drag reduction, anti-swelling and cleanup additive, the single-agent standard of the drag reducer is met, the requirements of site construction on the anti-swelling and cleanup additive performance of slickwater are also met, the multifunctional drag reducer is only required to be added during use, the requirements of the drag reduction performance index, the anti-swelling performance index and the cleanup additive performance index of slickwater fracturing fluid can be met, multiple agents are not required to be added on site, the investment and use of equipment and pipelines are reduced, the requirements on equipment and personnel are reduced, and the site construction is enabled to be operated orderly, smoothly and in a standardized manner.
The preparation method of the multifunctional resistance reducing agent of the embodiment comprises the following steps: adding a water-based dispersion medium, nano silicon dioxide and a clay stabilizer into a reaction kettle in sequence, uniformly stirring to form a dispersion system, then adding a liquid resistance reducing agent and a discharge aiding agent in sequence, uniformly stirring, and finally preparing a multi-functional prefabricated product with multiple effects for field use.
Example 4
The embodiment provides a slickwater fracturing fluid which is prepared by adding the 'resistance reduction + anti-swelling' type multifunctional resistance reducer in the embodiment 1 with the mass ratio of 0.20% into water for mixing, the preparation operation is simple and convenient, and the problems of difficult construction, difficult management and disordered construction site caused by the need of simultaneously adding various additives on the construction site to meet the requirements of various performance indexes of the fracturing fluid are solved.
Example 5
The embodiment provides a slickwater fracturing fluid which is prepared by adding the 'resistance reducing + anti-swelling' type multifunctional resistance reducing agent in the embodiment 1 with the mass ratio of 0.30% into water for mixing, the field preparation operation is simple and convenient, and the problems of difficult construction, difficult management and disordered construction field caused by the need of simultaneously adding various additives on the construction field to meet the requirements of various performance indexes of the fracturing fluid are solved.
Example 6
The embodiment provides a slickwater fracturing fluid which is prepared by adding the 'resistance reduction + drainage assisting' type multifunctional resistance reducer in the embodiment 2 with the mass ratio of 0.10% into water for mixing, the field preparation operation is simple and convenient, and the problems of difficult construction, difficult management and disordered construction field caused by the fact that a plurality of additives need to be added simultaneously in order to meet the requirements of various performance indexes of the fracturing fluid on the construction field are solved.
Example 7
The embodiment provides a slickwater fracturing fluid which is prepared by adding the 'resistance reduction + drainage assisting' type multifunctional resistance reducer in the embodiment 2 with the mass ratio of 0.15% into water for mixing, the field preparation operation is simple and convenient, and the problems of difficult construction, difficult management and disordered construction field caused by the fact that a plurality of additives need to be added simultaneously in order to meet the requirements of various performance indexes of the fracturing fluid on the construction field are solved.
Example 8
The embodiment provides a slickwater fracturing fluid which is prepared by adding the multifunctional resistance reducing agent of the 'resistance reducing + anti-swelling + drainage assisting' type in the embodiment 3 with the mass ratio of 0.2% into water for mixing, the field preparation operation is simple and convenient, and the problems of difficult construction, difficult management and disordered construction field caused by the need of simultaneously adding various additives on the construction field to meet the requirements of various performance indexes of the fracturing fluid are solved.
Example 9
The embodiment provides a slickwater fracturing fluid which is prepared by adding the multifunctional resistance reducing agent of the 'resistance reducing + anti-swelling + drainage assisting' type in the embodiment 3 with the mass ratio of 0.3% into water for mixing, the field preparation operation is simple and convenient, and the problems of difficult construction, difficult management and disordered construction field caused by the need of simultaneously adding various additives in the construction field to meet the requirements of various performance indexes of the fracturing fluid are solved.
Performance verification
1. Performance of various embodiments of the multifunctional drag reducer product
The performance of the multifunctional resistance reducing agent product of the embodiment 1-3 is verified according to the requirements of the industry standard (NB/T14003.2-2016 shale gas fracturing fluid, part 2: resistance reducing agent performance index and test method), and the detection results of all indexes meet the requirements, specifically shown in the table I.
TABLE I, EXAMPLE 1-3 Multi-functional drag reducer Properties
2. Slickwater fracturing fluid prepared from multifunctional resistance reducing agent product
According to the technical requirements of corresponding indexes in the industrial standard (NB/T14003.1-2015 shale gas fracturing fluid, part 1: slickwater performance index and evaluation method), the fracturing fluid prepared by the multifunctional resistance reducer products of examples 4-9 is subjected to performance verification, and the detection results of all indexes meet the requirements, which are shown in Table II.
TABLE II, examples 4-9 slip Water fracturing fluids Performance formulated with multifunctional drag reducer products
In the second table, the drag reduction rate reflects the drag reduction performance of the slickwater fracturing fluid, the surface tension, the interfacial tension and the discharge rate reflect the drainage assisting performance of the slickwater fracturing fluid, and the CST ratio reflects the anti-swelling performance of the slickwater fracturing fluid. According to the detection result of the slickwater performance, the multifunctional resistance reducing agent product (embodiment 1-3) with corresponding performance is adopted, and the performance of the slickwater fracturing fluid (embodiment 4-9) prepared by directly dissolving meets the corresponding index requirement.
It can be seen from table two that, the slickwater fracturing fluids of examples 4 and 5 are prepared by dissolving the multifunctional resistance reducing agent of the type of 'resistance reduction + drainage assistance' in example 1 in water, and both the resistance reduction rate and the CST ratio meet the index requirements, which shows that the multifunctional purpose of 'resistance reduction + anti-swelling' is achieved, and the resistance reduction performance and the anti-swelling performance are good.
The slickwater fracturing fluid prepared by dissolving the multifunctional resistance reducing agent of the type of 'resistance reducing and drainage assisting' in the embodiment 2 in water meets the requirements on resistance reducing rate, surface tension, interfacial tension and drainage rate, and therefore the multifunctional purpose of 'resistance reducing and drainage assisting' is achieved, and the resistance reducing performance and the drainage assisting performance are good.
The slick water fracturing fluid of the embodiments 8 and 9 is prepared by dissolving the multifunctional resistance reducing agent of the type of 'resistance reducing, anti-swelling and discharge assisting' in the embodiment 3 in water, and the indexes of the resistance reducing rate, the surface tension, the interfacial tension, the CST ratio and the discharge rate all meet the standard requirements, so that the multifunctional purposes of 'resistance reducing, anti-swelling and discharge assisting' are achieved, and the resistance reducing, anti-swelling and discharge assisting performances are good.
Claims (10)
1. The multifunctional resistance reducing agent convenient to use is characterized by comprising the following raw materials: a water-based dispersion medium, a drag reducer, a suspending dispersant, and at least one of a clay stabilizer and a cleanup additive; the use method of the multifunctional resistance reducing agent is directly adding into water for mixing.
2. The multifunctional resistance reducing agent convenient to use according to claim 1, 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 and 1-3% of suspension dispersant; the use method of the multifunctional resistance reducing agent is directly adding into water for mixing.
3. The multifunctional resistance reducing agent convenient to use according to claim 1, 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 suspending dispersant; the use method of the multifunctional resistance reducing agent is directly adding into water for mixing.
4. The multifunctional friction reducer convenient to use according to claim 1 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 suspending dispersant.
5. The multifunctional resistance reducing agent convenient to use according to any one of claims 1 to 4, wherein the water-based dispersion medium is an inhibition type emulsion dispersion medium prepared from 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 multifunctional resistance reducing agent convenient to use according to any one of claims 1 to 4, wherein the resistance reducing agent comprises, by mass, 25 to 45% of water, 15 to 35% of a composite inhibitor, 5 to 15% of a temperature-resistant stabilizer, 1 to 3% of an emulsion thickener, 0.2 to 1.5% of a temperature-resistant suspending agent, and 15 to 45% of a water-soluble polymer.
7. The multifunctional resistance reducing agent convenient to use according to any one of claims 1 to 4, wherein the clay stabilizer is a composite salt of ammonium chloride and potassium chloride.
8. The multifunctional resistance reducing agent convenient to use according to any one of claims 1 to 4, wherein the cleanup additive is a fluorocarbon surfactant.
9. The multifunctional resistance reducing agent convenient to use according to any one of claims 1 to 4, wherein the suspending dispersant is nano silica.
10. The slickwater fracturing fluid is characterized by being prepared by mixing the multifunctional resistance reducing agent as defined in any one of claims 1 to 9 with water, wherein the mass ratio of the multifunctional resistance reducing agent is 0.1-0.3%.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115386357A (en) * | 2022-10-27 | 2022-11-25 | 东营才聚科技有限责任公司 | Preparation method and application of composite dry powder for oil and gas development |
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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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| US20090105097A1 (en) * | 2007-10-22 | 2009-04-23 | Carlos Abad | Degradable Friction Reducer |
| 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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| CN115011324B (en) | 2024-01-05 |
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