WO2019245410A1 - Способ селективной обработки призабойной зоны пласта - Google Patents
Способ селективной обработки призабойной зоны пласта Download PDFInfo
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- WO2019245410A1 WO2019245410A1 PCT/RU2019/050008 RU2019050008W WO2019245410A1 WO 2019245410 A1 WO2019245410 A1 WO 2019245410A1 RU 2019050008 W RU2019050008 W RU 2019050008W WO 2019245410 A1 WO2019245410 A1 WO 2019245410A1
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- silicon dioxide
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- tubing
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- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims description 61
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 279
- 239000000203 mixture Substances 0.000 claims abstract description 271
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 140
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 140
- 239000002253 acid Substances 0.000 claims abstract description 136
- 239000003921 oil Substances 0.000 claims abstract description 134
- 239000002105 nanoparticle Substances 0.000 claims abstract description 104
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims abstract description 100
- 239000007864 aqueous solution Substances 0.000 claims abstract description 92
- 238000004519 manufacturing process Methods 0.000 claims abstract description 57
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims abstract description 56
- 239000001110 calcium chloride Substances 0.000 claims abstract description 56
- 229910001628 calcium chloride Inorganic materials 0.000 claims abstract description 56
- 239000001103 potassium chloride Substances 0.000 claims abstract description 50
- 235000011164 potassium chloride Nutrition 0.000 claims abstract description 50
- 239000000839 emulsion Substances 0.000 claims abstract description 42
- 150000001298 alcohols Chemical class 0.000 claims abstract description 7
- 239000000243 solution Substances 0.000 claims description 104
- 239000003995 emulsifying agent Substances 0.000 claims description 95
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Natural products CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 94
- MTHSVFCYNBDYFN-UHFFFAOYSA-N anhydrous diethylene glycol Natural products OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 94
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 92
- 239000002245 particle Substances 0.000 claims description 91
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 76
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 69
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- 239000004094 surface-active agent Substances 0.000 claims description 67
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- 239000000194 fatty acid Substances 0.000 claims description 45
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- 238000002360 preparation method Methods 0.000 claims description 44
- 238000005086 pumping Methods 0.000 claims description 40
- 238000012545 processing Methods 0.000 claims description 38
- KRHYYFGTRYWZRS-UHFFFAOYSA-N hydrofluoric acid Substances F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 36
- 238000005260 corrosion Methods 0.000 claims description 34
- 230000007797 corrosion Effects 0.000 claims description 34
- 239000003112 inhibitor Substances 0.000 claims description 34
- 230000002940 repellent Effects 0.000 claims description 32
- 239000005871 repellent Substances 0.000 claims description 32
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 30
- 238000004132 cross linking Methods 0.000 claims description 30
- 239000000945 filler Substances 0.000 claims description 30
- 238000011282 treatment Methods 0.000 claims description 26
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 21
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 21
- 239000004571 lime Substances 0.000 claims description 21
- 239000003795 chemical substances by application Substances 0.000 claims description 20
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 18
- 239000002202 Polyethylene glycol Substances 0.000 claims description 16
- 150000002170 ethers Chemical class 0.000 claims description 16
- 229920001223 polyethylene glycol Polymers 0.000 claims description 16
- 229920000151 polyglycol Polymers 0.000 claims description 16
- 239000010695 polyglycol Substances 0.000 claims description 16
- 239000011734 sodium Substances 0.000 claims description 16
- 229910052708 sodium Inorganic materials 0.000 claims description 16
- 150000004665 fatty acids Chemical class 0.000 claims description 15
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 12
- 239000000440 bentonite Substances 0.000 claims description 12
- 229910000278 bentonite Inorganic materials 0.000 claims description 12
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 12
- 229910021486 amorphous silicon dioxide Inorganic materials 0.000 claims description 6
- 238000011161 development Methods 0.000 abstract description 15
- 239000013543 active substance Substances 0.000 abstract description 5
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- 150000001412 amines Chemical class 0.000 description 43
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- 241000283690 Bos taurus Species 0.000 description 40
- 235000011167 hydrochloric acid Nutrition 0.000 description 36
- -1 author V.V. Sergeev Chemical compound 0.000 description 35
- 235000011054 acetic acid Nutrition 0.000 description 31
- 239000012530 fluid Substances 0.000 description 31
- 150000001408 amides Chemical class 0.000 description 30
- 239000008235 industrial water Substances 0.000 description 28
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 description 23
- 230000008569 process Effects 0.000 description 20
- 239000012071 phase Substances 0.000 description 17
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 15
- 238000006243 chemical reaction Methods 0.000 description 15
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- 208000011797 pustulosis palmaris et plantaris Diseases 0.000 description 10
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- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
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- 230000005653 Brownian motion process Effects 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical class NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 1
- 206010034912 Phobia Diseases 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 150000001243 acetic acids Chemical class 0.000 description 1
- 230000009471 action Effects 0.000 description 1
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- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
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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
- C09K8/602—Compositions for stimulating production by acting on the underground formation containing surfactants
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/27—Methods for stimulating production by forming crevices or fractures by use of eroding chemicals, e.g. acids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- 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
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
-
- 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
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/584—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific 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
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/72—Eroding chemicals, e.g. acids
-
- 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
- C09K8/72—Eroding chemicals, e.g. acids
- C09K8/74—Eroding chemicals, e.g. acids combined with additives added for specific purposes
-
- 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
- C09K8/845—Compositions based on water or polar solvents containing inorganic compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/92—Compositions for stimulating production by acting on the underground formation characterised by their form or by the form of their components, e.g. encapsulated material
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/10—Nanoparticle-containing well treatment fluids
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/32—Anticorrosion additives
Definitions
- the invention relates to the oil industry, and in particular to technologies for intensifying oil production in order to increase the pace of development of oil and gas fields and increase the oil recovery coefficient.
- Advanced watering of oil and gas objects is one of the most common problems that reduce the efficiency of oil and gas field development.
- Several leading factors can simultaneously be causes of waterlogging, including geological micro- and macroinhomogeneity of the formations, natural fracturing of the formations in combination with intensive development systems, a high level of well interference, widespread adoption of hydraulic fracturing technology, etc.
- the main difficulty in the fight against leading waterlogging is that all of the above factors can be combined within a single development and field.
- Selectivity can consist in the property of water-limiting process fluids to selectively block the most permeable water-saturated intervals of reservoirs, which ensures redistribution of filtration flows over the volume of the reservoir and involvement of less permeable stagnant zones in the development processes.
- the impact is carried out in stages: the first stage is processing high-permeability zones of the bottom-hole zone with an emulsion solution (hereinafter referred to as ER), the second stage is the injection of the oil rim, the third stage is the effect of the acid composition on the low-permeability intervals of the bottom-hole zone.
- the wettability of the PZP rocks is preliminarily determined, and in the case of hydrophilicity of the rocks, a direct type ER of the following composition is used, May.
- % emulsifier of the brand Sinol EM or Sinol EMR - 3-5, the hydrocarbon phase (diesel fuel or prepared oil from the oil collection point) - 20-25, the colloidal solution of silicon dioxide nanoparticles - 0.5-3, the aqueous phase - the rest.
- an inverse type ER of the following composition is used, May. %: emulsifier of the brand Sinol EM or Sinol EMR - 3-5, the hydrocarbon phase (diesel fuel or prepared oil from the oil collection point) - 40-45, the colloidal solution of silicon dioxide nanoparticles - 1-3, the aqueous phase - the rest.
- the technology is limited in the number of repeated applications - no more than two.
- the frequency of conducting hydrochloric or clay-acid treatments of PZP on average is 12-16 months, and the period of economically feasible well operation can reach 25 years.
- the disadvantage of this method is the limitation for the application of technology in high-temperature formations with a reservoir temperature of more than 90 ° C, and the limitation in the number of repeated applications is not more than two.
- a method for treating the bottom-hole zone of an oil reservoir which includes sequential injection of a hydrocarbon solution of a product based on a nonionic surfactant and an acid-containing reagent, and subsequent sale of water into the reservoir.
- a hydrocarbon solution of a product based on nonionic surfactants use, in particular, a hydrocarbon solution of an invert emulsion emulsifier.
- an acid-containing reagent for example, hydrochloric acid or a mixture of hydrochloric and hydrofluoric acids (clay acid) or a clay-acid composition of the brand GK ML and others can be used.
- the disadvantage of this method is the injection in the PZP of a hydrocarbon solution of a surfactant (URPAW) as a water-limiting composition, which, having a low dynamic viscosity (in the range 1.27-1.85 mPa-s) in reservoir conditions, does not create sufficient hydraulic resistance to prevent filtration processes of reservoir and water Also, the disadvantage is the need for holding URPAV for 1 -24 hours, which significantly increases the downtime of the well for repair.
- URPAW surfactant
- a method for treating an oil-containing formation which consists in sequentially pumping a hydrocarbon fluid and a solution of sulfuric acid into the near-wellbore zone.
- a hydrocarbon liquid a composition is used that contains, in particular, light oil fractions, an emulsifier, and a corrosion inhibitor.
- the disadvantage of this method is the use of a solution of sulfuric acid (75-96 wt.%), which is characterized by high corrosiveness in relation to downhole equipment and casing strings, in addition, the method does not determine the amount of sulfuric acid injected and it is proposed to pump acid into the borehole zone the treated formation until the pH drops below 6.0 at a neighboring well, which in practice cannot be controlled with sufficient accuracy.
- the disadvantage of this method is the use of hydrochloric acid in the mixture, and not a separate step in the processing of the intervals with an acid composition with a certain concentration of the active substance. This fact also does not allow selective processing of less permeable channels of the bottomhole formation zone.
- a method for treating the bottom-hole zone of a formation which consists in treating the bottom-hole zone of a formation with a composition containing an emulsion system, an acid composition and an aqueous solution of salt .
- the composition used contains diesel fuel or oil, an emulsifier, microparticles of silicon dioxide, an aqueous solution of salt, hydrochloric and acetic acids.
- the disadvantage of this method is the proposed dispersion procedure, which leads to coagulation of solid particles in the aqueous phase and the inability to prepare an emulsion with uniform dispersion, and in one embodiment of the method it is proposed to use hydrochloric and other acids in a mixture, rather than a separate stage of processing the intervals with an acid composition with a certain concentration of the active substance, which does not allow you to selectively process less permeable channels PZP.
- the essence of the invention lies in the fact that they carry out three or more stages of processing the bottom-hole zone of the formation with the estimated frequency of implementation of the stages, and the implementation of the second and each subsequent stage is carried out while reducing the productivity coefficient and / or daily oil production rate by 25% or more over the past 6 months well operation.
- the bottom-hole zone of the formation is treated sequentially with a highly stable emulsion system, an acid composition and an aqueous solution of potassium chloride or calcium chloride
- the bottom-hole zone of the formation is sequentially treated with a highly stable emulsion system, a composition of surfactants and alcohols and an aqueous a solution of potassium chloride or calcium chloride.
- a highly stable emulsion system contains (% vol.): Diesel fuel or prepared oil from the oil preparation and pumping station - 10-20, emulsifier - 3, colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm - 0.25-1, or hydrophilic colloidal solution silicon dioxide nanoparticles with a particle size of 5 to 100 nm - 0.25-1, or hydrophilic nanoparticles of dry amorphous silicon dioxide with a particle size of 5 to 500 nm - 1-2, as well as an aqueous solution of calcium chloride or potassium chloride - the rest.
- a colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 31-32.5, propylene glycol monomethyl ether - 67-68.8, water - the rest.
- a colloidal solution of hydrophilic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 30-31 in isopropanol - 67-68.5 and methyl alcohol - the rest, or silicon dioxide - 29-31 in ethylene glycol - the rest .
- the acid composition for carbonate rocks contains (% vol.): 30% hydrochloric acid 63.5-65, acetic acid 3.5, diethylene glycol 8-9, amide based water repellent agent 1.5-2, corrosion inhibitor 1.5-2, process water - the rest.
- the acid composition for terrigenous rocks contains (% vol.): 30% hydrochloric acid 60.5-61, hydrofluoric acid 3-4, acetic acid 3.3-3.5, diethylene glycol 8-9, amide based water repellent 1.5- 2, corrosion inhibitor - 1.8-2, industrial water - the rest.
- composition of surfactants and alcohols contains (% vol.): Monoalkylphenyl ethers of polyethylene glycol - 40-41, sodium alkyliminodipropionates - 2.5-3, polyglycols - 15-16, methanol - the rest.
- the technical result of the claimed invention is to increase the thermal stability of the emulsion system, increase the pace of development of an oil and gas-bearing object, increase the duration of the positive effect and additional oil production.
- the invention is illustrated by the following graphic materials.
- FIG. Figure 1 shows a schematic illustration of the structure of a highly stable emulsion system with a content of silicon dioxide nanoparticles (hereinafter - ESN).
- FIG. 2 is a table revealing the technique and equipment for the preparation of ENG.
- FIG. 3 is a table showing the technique and equipment for injecting ENG into the well.
- FIG. Figure 4 shows the arrangement of special equipment in the well during the implementation of the processing stage.
- FIG. 5 is a flow chart of processing using one packer device.
- FIG. 6 is a flow chart of processing using two packer devices.
- FIG. 7 is a table with the results of testing the thermal stability of classical emulsions and ESN at 140 ° C.
- FIG. Figure 8 shows the flow curves of samples of classical emulsion (hereinafter referred to as ES) and ESN at 20 ° C.
- FIG. Figure 9 shows the flow curves of ES and ESN samples at 90 ° C.
- FIG. Figure 10 shows the viscosity curves of ES and ESN samples at 20 ° C.
- FIG. 11 shows the viscosity curves of ES and ESN samples at 90 ° C.
- FIG. Figure 12 shows the dynamics of changes in pressure drop and permeability in the study of the impact of ENG on core carbonate rocks.
- FIG. Figure 13 shows the dependence of the residual resistance factor of the ESN on the pressure drop in the cores of carbonate rocks.
- Filtration processes of process fluids and formation fluids in porous media are determined by phenomena occurring both at the interfaces between process fluids, oil, water, gas, and at the contact of process fluids and formation fluids with rock.
- the proposed method for the selective treatment of the bottom-hole formation zone (hereinafter - PZP) in order to intensify oil production is developed on the basis of the properties of process fluids to change and effectively control the surface-molecular properties of rocks.
- the PPP is processed sequentially in three stages of pumping process fluids with different physicochemical properties.
- three or more stages of processing of the PPP are provided with the estimated frequency of the stages.
- Each stage of the processing of PZP includes three stages of pumping technological fluids into the well, combined into one technological process, which ensures the selectivity of processing by technology.
- an ESN is injected into the PZP to change the wettability and to limit the injectivity of the most permeable water-saturated PZP intervals.
- a highly stable emulsion system contains (% vol.): Diesel fuel or prepared oil from the oil preparation and pumping station - 10-20, emulsifier - 3, a colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm - 0.25-1, or a colloidal solution of hydrophilic nanoparticles of silicon dioxide with a particle size of 5 to 100 nm is 0.25-1, or hydrophilic nanoparticles of dry amorphous silicon dioxide with a particle size of 5 to 500 nm is 1-2, and an aqueous solution of calcium chloride or potassium chloride is the rest.
- a composition containing (% vol.) Is used fatty acid amino amides - 43-45, amine oxide - 0.7-1, diesel fuel - the rest.
- a composition containing (% vol.) Is used fatty acid amino amides - 43-45, amine oxide - 0.7-1, lime or bentonite as a crosslinking high-temperature filler - 2- 5, diesel fuel - the rest.
- the used colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 31-32.5, propylene glycol monomethyl ether - 67-68.8, water - the rest, and a colloidal solution of hydrophilic silicon dioxide nanoparticles with a size particles from 5 to 100 nm contains (% vol.): silicon dioxide - 30-31 in isopropanol - 67-68.5 and methyl alcohol - the rest, or silicon dioxide - 29-31 in ethylene glycol - the rest.
- FIG. 1 is a schematic representation of an ESN structure, where 1 is a hydrocarbon medium, 2 is an aqueous phase globule, 3 is an adsorption-solvate layer of silicon dioxide and surfactant nanoparticles.
- Water-washed most permeable intervals of the reservoir are hydrophilic, which creates additional resistance to progress along them a predominantly hydrophobic emulsion system and reduces the risk of the emulsion system breaking deeper into the formation through water-washed filtration channels.
- the acid composition is injected to push ESN deep into the bottomhole zone and increase the filtration parameters of less permeable bottom hole zones.
- a change in the wettability angle of the rocks as a result of the injection of a hydrocarbon emulsion system at the first stage of processing leads to additional resistance for the movement of a water-based acid composition through these channels, which under these conditions will be filtered mainly in less permeable intervals of the formation.
- Acid compositions due to the partial dissolution of a number of muds and rock minerals can increase the filtration parameters of the less permeable intervals of the reservoir, providing a redistribution of the filtration flows of fluids entering the bottomhole formation zone.
- the acid composition for carbonate rocks of the bottomhole formation zone contains (% vol.): 30 percent hydrochloric acid 63.5-65, acetic acid 3.5, diethylene glycol 8-9, amide based water repellent 1.5-2, corrosion inhibitor 1.5-2 -2, industrial water - the rest.
- the acid composition for terrigenous rocks of the bottomhole formation zone contains (% vol.): 30% hydrochloric acid 60.5-61, hydrofluoric acid 3-4, acetic acid 3.3-3.5, diethylene glycol 8-9, amide-based water repellent agent - 1.5-2, corrosion inhibitor - 1.8-2, process water - the rest.
- an aqueous solution of potassium chloride or calcium chloride is injected, as a result of which the technological compositions injected into the PZP are forced deep into the PZP.
- Aqueous solutions of potassium chloride or calcium chloride are used (concentration in the range of 10-100 kg / m 3 with a solution density in the range of 1030-1350 kg / m 3 ) corresponding to the physicochemical characteristics of the kill fluids used in the treated formation.
- composition of surfactants and alcohols contains (% vol.): Monoalkylphenyl ethers of polyethylene glycol - 40-41, sodium alkyliminodipropionates - 2.5-3, polyglycols - 15-16, methanol - the rest.
- the time period between the implementation of the second and subsequent stages is determined based on the specific technological parameters of the well’s work, processed at the first stage, namely, the second and each subsequent stages of the processing of the bottom hole are subject to implementation while reducing the productivity coefficient and / or daily oil production rate by 25% and more over the last 6 months of well operation.
- the productivity coefficient is equal to the ratio of the daily production rate of the well to the depression at the bottom, and depends on a large number of factors, including the effective thickness and permeability of the formation, the diameter of the well, the degree and perfection of opening the formation, the composition and viscosity of the formation fluid, and the skin factor and etc.
- the rheological parameters of classical emulsions and ENG were measured on a Rheotest RN 4.1 rotational viscometer (Medingen GmbH, Germany) using a cylindrical measuring system (cylinder-to-cylinder) in the range of shear rates from 0.1 to 300 s -1 at temperatures of 20 and 90 ° ⁇ .
- the measurement error is ⁇ 3%.
- K - consistency (Pa-s), a measure of the consistency of a liquid (the higher the viscosity, the greater the value of this parameter);
- V is the shear strain rate, s 1 ;
- h is the structural viscosity (Pa-s);
- n - non-Newtonian index characterizes the degree of non-Newtonian behavior of the solution (the more n differs from 1, the higher the manifestation of non-Newtonian properties); then - ultimate shear stress (Pa) - characterizes the amount of external energy needed to start the fluid flow.
- the rheological properties of emulsion systems make it possible to control shear stresses and dynamic viscosity by varying the volume of the aqueous component of the system.
- the ability to control these parameters is an important technological property that must be taken into account in conjunction with the geological and physical characteristics of the formation when designing impacts using technologies for intensifying oil production.
- a kill fluid is used, which is used at a specific facility with a density of at least 1050 kg / m 3 .
- BPES emulsion systems
- the quality of the preparation and the stability of the properties of the SPE depends on the completeness of the mixing of the entire volume of the preparation tank, the purity of the containers, the input speed of the components and the dispersion time. It is recommended to use a container with “beveled” corners (the shape is close to cylindrical).
- the necessary equipment for the preparation of an ENG is shown in FIG. 2.
- the estimated amount of diesel fuel or prepared oil from the point of preparation and pumping of oil (dispersion medium) is collected in the tank for the preparation of an ENG.
- a centrifugal circulation pump and a paddle stirrer are started at maximum speed.
- the minimum required rotation speed is 100 rpm.
- the estimated amount of diesel fuel or prepared oil from the point of preparation and pumping of oil (dispersion medium) is collected in the tank for the preparation of an ENG.
- the paddle stirrer is launched at maximum speed.
- the minimum required rotation speed is 100 rpm.
- the technological capacity with ESN is put on circulation for 1-2 hours using the CA-320 pump unit. After gaining viscosity and dispersion (uniformity) of the ESA, stop circulation and take a control sample. After quality control, pump the ESN into the storage tank.
- ESN can be prepared prior to shipment and stored in an accumulation tank for 24 hours after preparation. Limiting the shelf life of ESN is associated with the risk of delamination, a set of excess viscosity during cooling in the winter.
- PNU mobile steam unit
- ADPM modernized mobile dewaxing unit
- Control is carried out by assessing the sedimentation stability of ESN. Test it is considered positive if, when the ESF was held at room temperature for 1 h, the aqueous phase was separated no more than 2% of the total ESN volume. If there are signs of delamination, continue mixing for another 1 hour. Repeat stratification test.
- the list of equipment and special equipment is basic and may include additional names depending on the conditions of work, the location of the mud unit, technological parameters and design features of the well.
- KRS 1 team of overhaul of wells
- the estimated injectivity of the treated well is measured, the packer and EC are crimped. If the injectivity of the well is less than 150 m 3 / day at a pressure of 100 atm, a decision is made on the preliminary preparation of the well by conducting an acid bath or solvent, reperforation.
- FIG. 5 and 6 two variants of the technological schemes for conducting the treatments are presented, shown in FIG. 5 and 6, where 8 is a buffer valve, 9 is a preventer, 10 is a pressure gauge, 1 1 is a production string, 12 is tubing, 13 is a packer with a hydraulic anchor, 14 is a shank with a funnel, 15 is a productive interval, 16 is a slot filter, 17 - target production interval, 18 - plug, 19 - bypass valve, 20 - mechanical packer, 21 - underlying productive interval.
- Process fluids are pumped at the highest possible flow rate and pressure. If the injection pressure reaches 80% of the maximum operating pressure of the equipment, it is necessary to reduce the flow rate and continue pumping the remaining volume of process fluids.
- a sump catcher must be included in the layout being lowered into the well.
- the exposure time depends on the concentration of hydrochloric and / or hydrofluoric acid in the composition, and in some cases is not provided. The exact exposure time is determined by laboratory tests for dissolving the core of the rock with an acidic composition or changing the wettability of the rocks with a surfactant composition.
- the tubing string shoe was installed in the interval 2 m below the treated PZP interval.
- ENG contains (% vol.): Prepared oil from the point of preparation and pumping of oil - 15, emulsifier - 3, colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm - 0.4, an aqueous solution of calcium chloride with a density of 1173 kg / m 3 - 81.6.
- the emulsifier contains (% vol.): Amino acids of fatty acids - 43, amine oxide - 0.7, diesel fuel - 56.3.
- a colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 31, propylene glycol monomethyl ether - 68.8, water - 0.2.
- ESN contains (% vol.): Diesel fuel - 13, emulsifier - 3, colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm - 0.3, an aqueous solution of calcium chloride with a density of 1172 kg / m 3 - 83.7.
- the emulsifier contains (% vol.): Amino acids of fatty acids - 43.5, amine oxide - 0.85, diesel fuel - 55.65.
- a colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 31.8, propylene glycol monomethyl ether - 68.15, water - 0.05.
- ENG contains (% vol.): Prepared oil from the point of preparation and pumping of oil - 16, emulsifier - 3, colloidal solution of hydrophobic nanoparticles of silicon dioxide with a particle size of 5 to 100 nm - 0.25, an aqueous solution of calcium chloride with a density of 1173 kg / m 3 - 80.75.
- the emulsifier contains (% vol.): Fatty acid amino amides - 45, amine oxide - 1, diesel fuel - 54.
- a colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 32.5 , propylene glycol monomethyl ether - 67, water - 0.5.
- ESA composition located in the tubing string and in the under-packer zone of ESN in a volume of 1.5 m 3 / m.
- a surfactant composition of the following composition was used (% vol.): Monoalkylphenyl ethers of polyethylene glycol - 40, sodium alkyliminodipropionates - 2.5, polyglycols - 15, methanol - 42.5.
- the surfactant composition When selling, the surfactant composition was pumped to the level of the tubing shoe.
- the pressure when pushing the last batch of SPE into the formation was set at a level not higher than the safe pressure on the casing.
- ESN contains (% vol.): Diesel fuel - 18, emulsifier - 3, colloidal solution of hydrophilic nanoparticles of silicon dioxide with a particle size of 5 to 100 nm - 0.25, an aqueous solution of potassium chloride with a density of 1200 kg / m 3 - 78.75.
- the emulsifier contains (% vol.): Fatty acid aminoamides - 45, amine oxide - 0.9, diesel - 54.1.
- a colloidal solution of hydrophilic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 30 in isopropanol - 67 and methyl alcohol 3
- ENG contains (% vol.): Prepared oil from the point of preparation and pumping of oil - 15, emulsifier - 3, colloidal solution of hydrophilic nanoparticles of silicon dioxide with a particle size of 5 to 100 nm - 0.25, an aqueous solution of potassium chloride with a density of 1200 kg / m 3 - 81.75.
- the emulsifier contains (% vol.): Amino acids of fatty acids - 43.5, amine oxide - 0.95, diesel fuel - 55.55.
- a colloidal solution of hydrophilic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 31 in isopropanol - 68.5 and methyl alcohol - 0.5.
- ESN was injected in a volume of 1.2 m 3 / m and the packer was landed in the following sequence: - Uploaded ESN to a level of 25 m above the upper perforation holes of the treated interval (on average half of the estimated volume of the ESN).
- ENG contains (% vol.): Prepared oil from the point of preparation and pumping of oil - 20, emulsifier - 3, Colloidal solution of hydrophilic nanoparticles of silicon dioxide with a particle size of 5 to 100 nm - 0.25, an aqueous solution of potassium chloride with a density of 1205 kg / m 3 - 76.75.
- the emulsifier contains (% vol.): Fatty acid amino amides - 43, amine oxide - 1, diesel fuel - 56.
- a colloidal solution of hydrophilic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 30.6 in isopropanol - 67.5 and methyl alcohol - 1.9.
- ESA composition located in the tubing string and in the under-packer zone of ESN in a volume of 1.5 m 3 / m.
- a surfactant composition of the following composition was used (% vol.): Monoalkylphenyl ethers of polyethylene glycol - 40.6, sodium alkyliminodipropionates - 2.8, polyglycols - 15.7, methanol - 40.9.
- the surfactant composition When selling, the surfactant composition was pumped to the level of the tubing shoe.
- the pressure when pushing the last batch of SPE into the formation was set at a level not higher than the safe pressure on the casing.
- SPE contains (% vol.): Prepared oil from the point of preparation and pumping of oil - 17, emulsifier - 3, colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm - 0.3, an aqueous solution of calcium chloride with a density of 1155 kg / m 3 - 79.7.
- the emulsifier contains (% vol.): Fatty acid amino amides - 43, amine oxide - 0.7, crosslinking high temperature filler (lime) - 2, diesel fuel - 54.3.
- a colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 31, propylene glycol monomethyl ether - 68.7, water - 0.3.
- ENG contains (% vol.): Prepared oil from the point of preparation and pumping of oil - 15, emulsifier - 3, a colloidal solution of hydrophobic nanoparticles of silicon dioxide with a particle size of 5 to 100 nm - 0.3, an aqueous solution of calcium chloride with a density of 1157 kg / m 3 - 81.7.
- the emulsifier contains (% vol.): Fatty acid aminoamides - 43.5, amine oxide - 0.85, crosslinking high-temperature filler (lime) - 3, diesel fuel - 52.65.
- a colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 31.8, propylene glycol monomethyl ether - 68, water - 0.2.
- ENG contains (% vol.): Prepared oil from the point of preparation and pumping of oil - 16, emulsifier - 3, colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm - 0.25, an aqueous solution of calcium chloride with a density of 1158 kg / m 3 - 80.75.
- the emulsifier contains (% vol.): Amino acids of fatty acids - 44.5, amine oxide - 0.8, crosslinking high-temperature filler (lime) - 4.5, diesel fuel - 50.2.
- a colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 32.5, propylene glycol monomethyl ether - 67, water - 0.5.
- ESA composition located in the tubing string and in the under-packer zone of ESN in a volume of 1.2 m 3 / m.
- a surfactant composition of the following composition was used (% vol.): Monoalkylphenyl ethers of polyethylene glycol - 40, sodium alkyliminodipropionates - 2.5, polyglycols - 15, methanol - 42.5.
- the surfactant composition When selling, the surfactant composition was pumped to the level of the tubing shoe.
- the pressure when pushing the last batch of SPE into the formation was set at a level not higher than the safe pressure on the casing.
- ESN contains (% vol.): Diesel fuel - 10, emulsifier - 3, a colloidal solution of hydrophilic nanoparticles of silicon dioxide with a particle size of 5 to 100 nm - 0.25, an aqueous solution of potassium chloride with a density of 1200 kg / m 3 - 86.75.
- the emulsifier contains (% vol.): Amino acids of fatty acids - 45, amine oxide - 0.9, crosslinking high-temperature filler (bentonite) - 5, diesel fuel - 49.1.
- a colloidal solution of hydrophilic nanoparticles of silicon dioxide with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 30 in isopropanol - 67 and methyl alcohol - 3.
- ESN contains (% vol.): Diesel fuel - 13, emulsifier - 3, colloidal solution of hydrophilic nanoparticles of silicon dioxide with a particle size of 5 to 100 nm - 0.3, an aqueous solution of potassium chloride with a density of 1203 kg / m 3 - 83.7.
- the emulsifier contains (% vol.): Fatty acid amino amides - 43.5, amine oxide - 0.95, crosslinking high-temperature filler (bentonite) - 4.5, diesel fuel - 51.05.
- Colloidal solution of hydrophilic nanoparticles of silicon dioxide with a particle size of 5 up to 100 nm contains (% vol.): silicon dioxide - 31 in isopropanol - 68.5 and methyl alcohol - 0.5.
- ENG contains (% vol.): Prepared oil from the point of oil preparation and pumping - 18, emulsifier - 3, colloidal solution of hydrophilic nanoparticles of silicon dioxide with a particle size of 5 to 100 nm - 0.3, an aqueous solution of potassium chloride with a density of 1205 kg / m 3 - 78.7.
- the emulsifier contains (% vol.): Fatty acid amino amides - 43, amine oxide - 1, a crosslinking high-temperature filler (bentonite) - 4, diesel fuel - 52.
- a colloidal solution of hydrophilic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains ( % vol.): silicon dioxide - 30.6 in isopropanol - 67.5 and methyl alcohol - 1.9.
- ESA composition located in the tubing string and in the under-packer zone of ESN in a volume of 1.5 m 3 / m.
- a surfactant composition of the following composition was used (% vol.): Monoalkylphenyl ethers of polyethylene glycol - 40.6, sodium alkyliminodipropionates - 2.8, polyglycols - 15.7, methanol - 40.9.
- the surfactant composition When selling, the surfactant composition was pumped to the level of the tubing shoe.
- the pressure when pushing the last batch of SPE into the formation was set at a level not higher than the safe pressure on the casing.
- ENG contains (% vol.): Prepared oil from the oil preparation and pumping station - 15, emulsifier - 3, colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm - 1, an aqueous solution of calcium chloride with a density of 1170 kg / m 3 - 81.
- the emulsifier contains (% vol.): Fatty acid amino amides - 43, amine oxide - 0.7, diesel fuel - 56.3.
- a colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 31, propylene glycol monomethyl ether - 68.8, water - 0.2.
- ESN contains (% vol.): Diesel fuel - 13, emulsifier - 3, colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm - 0.8, an aqueous solution of calcium chloride with a density of 1170 kg / m 3 - 83.2.
- the emulsifier contains (% vol.): Amino acids of fatty acids - 43.5, amine oxide - 0.85, diesel fuel - 55.65.
- a colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 31.8, propylene glycol monomethyl ether - 68.15, water - 0.05.
- ENG contains (% vol.): Prepared oil from the point of preparation and pumping of oil - 16, emulsifier - 3, colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm - 1, an aqueous solution of calcium chloride with a density of 1173 kg / m 3 - 80.
- the emulsifier contains (% vol.): Fatty acid amino amides - 45, amine oxide - 1, diesel fuel - 54.
- a colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): Dioxide silicon - 32.5, propylene glycol monomethyl ether - 67, water - 0.5.
- ESA composition located in the tubing string and in the under-packer zone of ESN in a volume of 1.5 m 3 / m.
- a surfactant composition of the following composition was used (% vol.): Monoalkylphenyl ethers of polyethylene glycol - 40, sodium alkyliminodipropionates - 2.5, polyglycols - 15, methanol - 42.5.
- the surfactant composition was pumped to the level of the tubing shoe. The pressure when pushing the last batch of SPE into the formation was set at a level not higher than the safe pressure on the casing.
- ESN contains (% vol.): Diesel fuel - 18, emulsifier - 3, colloidal solution of hydrophilic nanoparticles of silicon dioxide with a particle size of 5 to 100 nm - 0.5, an aqueous solution of potassium chloride with a density of 1205 kg / m 3 - 78.5.
- the emulsifier contains (% vol.): Fatty acid aminoamides - 45, amine oxide - 0.9, diesel - 54.1.
- a colloidal solution of hydrophilic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 30 in isopropanol - 67 and methyl alcohol 3
- ENG contains (% vol.): Prepared oil from the point of preparation and pumping of oil - 15, emulsifier - 3, colloidal solution of hydrophilic nanoparticles of silicon dioxide with a particle size of 5 to 100 nm - 1, an aqueous solution of potassium chloride with a density of 1205 kg / m 3 - 81.
- the emulsifier contains (% vol.): Fatty acid aminoamides - 43.5, amine oxide - 0.95, diesel fuel - 55.55.
- a colloidal solution of hydrophilic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 31 in isopropanol - 68.5 and methyl alcohol - 0.5.
- ENG contains (% vol.): Prepared oil from the point of preparation and pumping of oil - 20, emulsifier - 3, Colloidal solution of hydrophilic nanoparticles of silicon dioxide with a particle size of 5 to 100 nm - 0.8, an aqueous solution of potassium chloride with a density of 1205 kg / m 3 - 76.2.
- the emulsifier contains (% vol.): Fatty acid amino amides - 43, amine oxide - 1, diesel fuel - 56.
- a colloidal solution of hydrophilic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 30.6 in isopropanol - 67.5 and methyl alcohol - 1.9.
- the surfactant composition When selling, the surfactant composition was pumped to the level of the tubing shoe.
- the pressure when pushing the last batch of SPE into the formation was set at a level not higher than the safe pressure on the casing.
- ENG contains (% vol.): Prepared oil from the point of preparation and pumping of oil - 17, emulsifier - 3, colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm - 1, an aqueous solution of calcium chloride with a density of 1150 kg / m 3 - 79.
- the emulsifier contains (% vol.): Fatty acid amino amides - 43, amine oxide - 0.7, crosslinking high temperature filler (lime) - 2, diesel fuel - 54.3.
- a colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 31, propylene glycol monomethyl ether - 68.7, water - 0.3.
- Second phase After 10 months, there was a tendency to a decrease in oil production by more than 25% with a decrease in productivity by less than 25% over a period of 6 months.
- ENG contains (% vol.): Prepared oil from the point of preparation and pumping of oil - 15, emulsifier - 3, colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm - 1, an aqueous solution of calcium chloride with a density of 1160 kg / m 3 - 81.
- the emulsifier contains (% vol.): Fatty acid aminoamides - 43.5, amine oxide - 0.85, crosslinking high-temperature filler (lime) - 3, diesel fuel - 52.65.
- a colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 31.8, propylene glycol monomethyl ether - 68, water - 0.2.
- ENG contains (% vol.): Prepared oil from the point of preparation and pumping of oil - 16, emulsifier - 3, colloidal solution of hydrophobic nanoparticles of silicon dioxide with a particle size of 5 to 100 nm - 0.5, an aqueous solution of calcium chloride with a density of 1160 kg / m 3 - 80.5.
- the emulsifier contains (% vol.): Amino acids of fatty acids - 44.5, amine oxide - 0.8, crosslinking high-temperature filler (lime) - 4.5, diesel fuel - 50.2.
- a colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 32.5, propylene glycol monomethyl ether - 67, water - 0.5.
- ESA composition located in the tubing string and in the under-packer zone of ESN in a volume of 1.5 m 3 / m.
- a surfactant composition of the following composition was used (% vol.): Monoalkylphenyl ethers of polyethylene glycol - 40, sodium alkyliminodipropionates - 2.5, polyglycols - 15, methanol - 42.5.
- the surfactant composition When selling, the surfactant composition was pumped to the level of the tubing shoe.
- the pressure when pushing the last batch of SPE into the formation was set at a level not higher than the safe pressure on the casing.
- ESN contains (% vol.): Diesel fuel - 10, emulsifier - 3, colloidal solution of hydrophilic nanoparticles of silicon dioxide with a particle size of 5 to 100 nm - 0.5, an aqueous solution of potassium chloride with a density of 1200 kg / m 3 - 86.5.
- the emulsifier contains (% vol.): Amino acids of fatty acids - 45, amine oxide - 0.9, crosslinking high-temperature filler (bentonite) - 5, diesel fuel - 49.1.
- a colloidal solution of hydrophilic nanoparticles of silicon dioxide with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 30 in isopropanol - 67 and methyl alcohol - 3.
- ESN was injected in a volume of 3.2 m 3 / m and the packer was landed in the following sequence: - Uploaded ESN to a level of 22 m above the upper perforation holes of the treated interval (on average half of the estimated volume of the ESN).
- ENG contains (% vol.): Diesel fuel - 13, emulsifier - 3, colloidal solution of hydrophilic nanoparticles of silicon dioxide with a particle size of 5 to 100 nm - 0.8, an aqueous solution of potassium chloride with a density of 1210 kg / m 3 - 83.2.
- the emulsifier contains (% vol.): Fatty acid amino amides - 43.5, amine oxide - 0.95, crosslinking high temperature filler (bentonite) - 4.5, diesel fuel - 51.05.
- a colloidal solution of hydrophilic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 31 in isopropanol - 68.5 and methyl alcohol - 0.5.
- ENG contains (% vol.): Prepared oil from the point of preparation and pumping of oil - 18, emulsifier - 3, a colloidal solution of hydrophilic nanoparticles of silicon dioxide with a particle size of 5 to 100 nm - 1, an aqueous solution of potassium chloride with a density of 1205 kg / m 3 - 78.
- the emulsifier contains (% vol.): amine amides of fatty acids - 43, oxide amine - 1, a crosslinking high temperature filler (bentonite) - 4, diesel fuel - 52.
- a colloidal solution of hydrophilic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): silicon dioxide - 30.6 in isopropanol - 67.5 and methyl alcohol - 1.9.
- the surfactant composition When selling, the surfactant composition was pumped to the level of the tubing shoe.
- the pressure when pushing the last batch of SPE into the formation was set at a level not higher than the safe pressure on the casing.
- ESN contains (% vol.): Diesel fuel - 14, emulsifier - 3, colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm - 1, water a solution of calcium chloride with a density of 1195 kg / m 3 - 82.
- the emulsifier contains (% vol.): amino acids of fatty acids - 45, amine oxide - 1, crosslinking high-temperature filler (bentonite) - 5, diesel fuel - 49.
- Colloidal solution of hydrophobic nanoparticles silicon dioxide with a particle size of 5 to 100 nm contains (% vol.): silicon dioxide - 32.2, propylene glycol monomethyl ether - 67.5, water - 0.3.
- ENG contains (% vol.): Prepared oil from the oil preparation and pumping station - 12, emulsifier - 3, colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm - 0.5, an aqueous solution of calcium chloride with a density of 1190 kg / m 3 - 84.5.
- the emulsifier contains (% vol.): Fatty acid amino amides - 43, amine oxide - 0.9, crosslinking high-temperature filler (bentonite) - 3, diesel fuel - 53.1.
- Colloidal solution of hydrophobic silicon dioxide nanoparticles with particle size from 5 to 100 nm contains (% vol.): silicon dioxide - 31, propylene glycol monomethyl ether - 68.6, water - 0.4.
- SPE contains (% vol.): Prepared oil from the oil preparation and pumping station - 10, emulsifier - 3, colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm - 1, an aqueous solution of calcium chloride with a density of 1190 kg / m 3 - 86.
- the emulsifier contains (% vol.): Fatty acid amino amides - 44, amine oxide - 0.9, crosslinking high-temperature filler (bentonite) - 4, diesel fuel - 51.1.
- a colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 31.2, propylene glycol monomethyl ether - 68.6, water - 0.2.
- the surfactant composition When selling, the surfactant composition was pumped to the level of the tubing shoe.
- the pressure when pushing the last batch of SPE into the formation was set at a level not higher than the safe pressure on the casing.
- ENG contains (% vol.): Prepared oil from the point of oil preparation and pumping - 20, emulsifier - 3, colloidal solution of hydrophilic silicon dioxide nanoparticles with a particle size of 5 to 100 nm - 0.5, an aqueous solution of potassium chloride with a density of 1210 kg / m 3 - 76.5.
- the emulsifier contains (% vol.): Fatty acid amino amides - 43, amine oxide - 1, crosslinking high-temperature filler (lime) - 2, diesel fuel - 54.
- a colloidal solution of hydrophilic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains ( % vol.): silicon dioxide - 29 in ethylene glycol - 71.
- ESN contains (% vol.): Diesel fuel - 17, emulsifier - 3, colloidal solution of hydrophilic nanoparticles of silicon dioxide with a particle size of 5 to 100 nm - 1, an aqueous solution of potassium chloride with a density of 1210 kg / m 3 - 79.
- the emulsifier contains ( % vol.):
- a colloidal solution of hydrophilic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 30 in ethylene glycol - 70.
- ESN contains (% vol.): Diesel fuel - 20, emulsifier - 3, colloidal solution of hydrophilic nanoparticles of silicon dioxide with a particle size of 5 to 100 nm - 0.8, an aqueous solution of potassium chloride with a density of 1205 kg / m 3 - 76.2.
- the emulsifier contains (% vol.): Fatty acid amino amides - 45, amine oxide - 0.9, crosslinking high-temperature filler (lime) - 5, diesel fuel - 49.1.
- a colloidal solution of hydrophilic nanoparticles of silicon dioxide with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 31 in ethylene glycol - 69.
- ESA composition located in the tubing string and in the under-packer zone of ESN in a volume of 1.7 m 3 / m.
- a surfactant composition of the following composition was used (% vol.): Monoalkylphenyl ethers of polyethylene glycol - 40.6, sodium alkyliminodipropionates - 2.8, polyglycols - 15.7, methanol - 40.9.
- the surfactant composition When selling, the surfactant composition was pumped to the level of the tubing shoe. The pressure when pushing the last batch of SPE into the formation was set at a level not higher than the safe pressure on the casing. 3) They sold the liquids (ESN + surfactant composition) in the tubing string with an aqueous solution of potassium chloride with a density of 1190 kg / m 3 to the tubing shoe.
- ENG contains (% vol.): Prepared oil from the point of preparation and pumping of oil - 11, emulsifier - 3, hydrophilic nanoparticles of dry amorphous silicon dioxide with a particle size of from 5 to 500 nm. - 1, an aqueous solution of potassium chloride with a density of 1180 kg / m 3 - 85.
- the emulsifier contains (% vol.): Fatty acid amino amides - 43, amine oxide - 0.7, crosslinking high-temperature filler (lime) - 2, diesel fuel - 54.3.
- ESN contains (% vol.): Diesel fuel - 10, emulsifier - 3, hydrophilic nanoparticles of dry amorphous silicon dioxide with a particle size of 5 to 500 nm. - 1.5, an aqueous solution of calcium chloride with a density of 1182 kg / m 3 - 85.5.
- the emulsifier contains (% vol.): Fatty acid amino amides - 45, amine oxide - 0.75, crosslinking high-temperature filler (lime) - 5, diesel fuel - 49.25.
- ENG contains (% vol.): Prepared oil from the point of preparation and pumping of oil - 10, emulsifier - 3, hydrophilic nanoparticles of dry amorphous silicon dioxide with a particle size of from 5 to 500 nm. - 2, an aqueous solution of potassium chloride with a density of 1183 kg / m 3 - 85.
- the emulsifier contains (% vol.): Fatty acid amino amides - 43, amine oxide - 0.7, crosslinking high-temperature filler (lime) - 5, diesel fuel - 51.3.
- ESA composition located in the tubing string and sub-packer zone of the SPE in a volume of 2 m 3 / m.
- a surfactant composition of the following composition was used (% vol.): Monoalkylphenyl ethers of polyethylene glycol - 40.6, sodium alkyliminodipropionates - 2.8, polyglycols - 15.7, methanol 40.9.
- the surfactant composition When selling, the surfactant composition was pumped to the level of the tubing shoe.
- the pressure when pushing the last batch of SPE into the formation was set at a level not higher than the safe pressure on the casing.
- ESN was injected in a volume of 2.3 m 3 / m and the packer was landed in the following sequence: - Uploaded ESN to a level of 24 m above the upper perforation holes of the treated interval (on average half of the estimated volume of the ESN).
- ENG contains (% vol.): Prepared oil from the oil preparation and pumping station - 13, emulsifier - 3, colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm - 0.5, an aqueous solution of calcium chloride with a density of 1150 kg / m 3 - 83.5.
- the emulsifier contains (% vol.): Fatty acid amino amides - 43, amine oxide - 0.7, crosslinking high temperature filler (lime) - 2, diesel fuel - 54.3.
- a colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 31, propylene glycol monomethyl ether - 68.7, water - 0.3.
- ESN was injected in a volume of 2.6 m 3 / m and the packer was landed in the following sequence: - Uploaded ESN to a level of 22 m above the upper perforation holes of the treated interval (on average half of the estimated volume of the ESN).
- ENG contains (% vol.): Prepared oil from the oil preparation and pumping point - 11, emulsifier - 3, colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm - 1, an aqueous solution of calcium chloride with a density of 1155 kg / m 3 - 85.
- the emulsifier contains (% vol.): Fatty acid amino amides - 43.5, amine oxide - 0.85, crosslinking high-temperature filler (lime) - 3, diesel fuel - 52.65.
- a colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 31.8, propylene glycol monomethyl ether - 68, water - 0.2.
- ENG contains (% vol.): Prepared oil from the point of preparation and pumping of oil - 10, emulsifier - 3, a colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm - 0.5, an aqueous solution of calcium chloride with a density of 1155 kg / m 3 - 86.5.
- the emulsifier contains (% vol.): Amino acids of fatty acids - 44.5, amine oxide - 0.8, crosslinking high-temperature filler (lime) - 4.5, diesel fuel - 50.2.
- a colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 32.5, propylene glycol monomethyl ether - 67, water - 0.5.
- a surfactant composition of the following composition was used (% vol.): Monoalkylphenyl ethers of polyethylene glycol - 40, sodium alkyliminodipropionates - 2.5, polyglycols - 15, methanol - 42.5.
- the surfactant composition When selling, the surfactant composition was pumped to the level of the tubing shoe.
- the pressure when pushing the last batch of SPE into the formation was set at a level not higher than the safe pressure on the casing.
- the tubing string shoe was installed in the interval 2 m lower than the treated PZP interval.
- ENG contains (% vol.): Prepared oil from the point of preparation and pumping of oil - 19, emulsifier - 3, colloidal solution of hydrophobic nanoparticles of silicon dioxide with a particle size of 5 to 100 nm - 0.7, an aqueous solution of potassium chloride with a density of 1180 kg / m 3 - 77.3.
- the emulsifier contains (% vol.): Fatty acid amino amides - 43, amine oxide - 1, crosslinking high-temperature filler (lime) - 2, diesel fuel
- a colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 32.5, propylene glycol monomethyl ether - 67, water - 0.5.
- Second phase After 12 months, there was a tendency to decrease the oil production rate of the well by more than 25% with a decrease in productivity coefficient of less than 25% over a period of 6 months.
- ESN contains (% vol.): Diesel fuel - 17, emulsifier - 3, colloidal solution
- the emulsifier contains (% vol.): Amine amides of fatty acids - 44, amine oxide - 0.85, crosslinking high-temperature filler (lime) - 3.5, diesel fuel - 51.65.
- the acid composition was pumped to the level of the tubing shoe.
- the pressure when pushing the last batch of SPE into the formation was set at a level not higher than the safe pressure on the casing.
- ESN contains (% vol.): Diesel fuel - 20, emulsifier - 3, colloidal solution of hydrophobic nanoparticles of silicon dioxide with a particle size of 5 to 100 nm - 0.8, an aqueous solution of potassium chloride with a density of 1185 kg / m 3 - 76.2.
- the emulsifier contains (% vol.): Fatty acid amino amides - 45, amine oxide - 0.9, crosslinking high-temperature filler (lime) - 5, diesel fuel - 49.1.
- a colloidal solution of hydrophobic silicon dioxide nanoparticles with a particle size of 5 to 100 nm contains (% vol.): Silicon dioxide - 31, propylene glycol monomethyl ether - 68.7, water - 0.3.
- ESA composition located in the tubing string and in the under-packer zone of ESN in a volume of 1.2 m 3 / m.
- a surfactant composition of the following composition was used (% vol.): Monoalkylphenyl ethers of polyethylene glycol - 40.6, sodium alkyliminodipropionates - 2.8, polyglycols - 15.7, methanol - 40.9.
- the surfactant composition When selling, the surfactant composition was pumped to the level of the tubing shoe.
- the pressure when pushing the last batch of SPE into the formation was set at a level not higher than the safe pressure on the casing.
- the invention provides an increase in the thermal stability of the emulsion system, an increase in the rate of development of an oil and gas-bearing object, an increase in the duration of the positive effect, and additional oil production.
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Abstract
Description
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Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA3103657A CA3103657A1 (en) | 2018-06-18 | 2019-01-28 | Method of selectively treating a bottom hole region of a formation |
BR112020024998-0A BR112020024998B1 (pt) | 2018-06-18 | 2019-01-28 | Método de tratamento seletivo da região do furo da base de uma formação para intensificar a produção de petróleo |
MX2020013387A MX2020013387A (es) | 2018-06-18 | 2019-01-28 | Metodo para tratar de manera selectiva una region de orificio de fondo de una formacion. |
CN201980038868.1A CN112513420B (zh) | 2018-06-18 | 2019-01-28 | 对地层的井底区域进行选择性处理的方法 |
EP19822104.6A EP3816395A4 (en) | 2018-06-18 | 2019-01-28 | PROCESS FOR SELECTIVE TREATMENT OF A BOTTOMHOLE AREA OF A FORMATION |
EA202092650A EA038753B1 (ru) | 2018-06-18 | 2019-01-28 | Способ селективной обработки призабойной зоны пласта |
US17/251,300 US11261718B2 (en) | 2018-06-18 | 2019-01-28 | Method of selectively treating a bottom hole region of a formation for intensifying oil production |
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RU2018122128 | 2018-06-18 | ||
RU2018122128A RU2700851C1 (ru) | 2018-06-18 | 2018-06-18 | Способ селективной обработки призабойной зоны пласта |
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WO2019245410A1 true WO2019245410A1 (ru) | 2019-12-26 |
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Country Status (9)
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US (1) | US11261718B2 (ru) |
EP (1) | EP3816395A4 (ru) |
CN (1) | CN112513420B (ru) |
BR (1) | BR112020024998B1 (ru) |
CA (1) | CA3103657A1 (ru) |
EA (1) | EA038753B1 (ru) |
MX (1) | MX2020013387A (ru) |
RU (1) | RU2700851C1 (ru) |
WO (1) | WO2019245410A1 (ru) |
Cited By (1)
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CN116006132A (zh) * | 2023-01-29 | 2023-04-25 | 西南石油大学 | 一种水驱气藏考虑气中凝析水影响的水侵量计算方法 |
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RU2659046C1 (ru) * | 2017-08-21 | 2018-06-27 | Виталий Вячеславович Сергеев | Способ глушения нефтяных и газовых скважин |
RU2728168C9 (ru) * | 2020-01-21 | 2020-10-28 | Общество с ограниченной ответственностью "Джиар Петролеум" | Способ предотвращения прорывов пластовых вод к забоям газовых, газоконденсатных или газогидратных скважин |
RU2742168C1 (ru) * | 2020-03-25 | 2021-02-02 | Общество с ограниченной ответственностью "ОИЛМАЙНД" | Способ выравнивания профиля приемистости нагнетательной скважины |
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2018
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116006132A (zh) * | 2023-01-29 | 2023-04-25 | 西南石油大学 | 一种水驱气藏考虑气中凝析水影响的水侵量计算方法 |
CN116006132B (zh) * | 2023-01-29 | 2024-05-14 | 西南石油大学 | 一种水驱气藏考虑气中凝析水影响的水侵量计算方法 |
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EA038753B1 (ru) | 2021-10-14 |
BR112020024998B1 (pt) | 2023-10-03 |
US20210254444A1 (en) | 2021-08-19 |
EP3816395A4 (en) | 2022-03-23 |
CN112513420B (zh) | 2023-03-28 |
EA202092650A1 (ru) | 2021-02-12 |
MX2020013387A (es) | 2021-05-27 |
CA3103657A1 (en) | 2019-12-26 |
EP3816395A1 (en) | 2021-05-05 |
RU2700851C1 (ru) | 2019-09-23 |
US11261718B2 (en) | 2022-03-01 |
CN112513420A (zh) | 2021-03-16 |
BR112020024998A2 (pt) | 2021-03-23 |
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