WO2021150142A1 - Способ предотвращения прорывов пластовых вод к забоям скважин - Google Patents
Способ предотвращения прорывов пластовых вод к забоям скважин Download PDFInfo
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- WO2021150142A1 WO2021150142A1 PCT/RU2020/050368 RU2020050368W WO2021150142A1 WO 2021150142 A1 WO2021150142 A1 WO 2021150142A1 RU 2020050368 W RU2020050368 W RU 2020050368W WO 2021150142 A1 WO2021150142 A1 WO 2021150142A1
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- Prior art keywords
- silicon dioxide
- gas
- vol
- well
- water
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims description 67
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 153
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 68
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 68
- 239000002283 diesel fuel Substances 0.000 claims abstract description 60
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 52
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 51
- 239000000203 mixture Substances 0.000 claims abstract description 44
- 239000003921 oil Substances 0.000 claims abstract description 43
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims abstract description 40
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000010415 colloidal nanoparticle Substances 0.000 claims abstract description 33
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000007864 aqueous solution Substances 0.000 claims abstract description 30
- 238000005086 pumping Methods 0.000 claims abstract description 28
- 239000002253 acid Substances 0.000 claims abstract description 26
- 150000007513 acids Chemical class 0.000 claims abstract description 25
- 239000011347 resin Chemical class 0.000 claims abstract description 25
- 229920005989 resin Chemical class 0.000 claims abstract description 25
- 239000000725 suspension Substances 0.000 claims abstract description 25
- 235000021122 unsaturated fatty acids Nutrition 0.000 claims abstract description 25
- 150000004670 unsaturated fatty acids Chemical class 0.000 claims abstract description 25
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000012760 heat stabilizer Substances 0.000 claims abstract description 24
- 239000001103 potassium chloride Substances 0.000 claims abstract description 20
- 235000011164 potassium chloride Nutrition 0.000 claims abstract description 20
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims abstract description 17
- 239000001110 calcium chloride Substances 0.000 claims abstract description 17
- 229910001628 calcium chloride Inorganic materials 0.000 claims abstract description 17
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000002360 preparation method Methods 0.000 claims description 28
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 claims description 18
- 239000008398 formation water Substances 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 32
- 150000002148 esters Chemical class 0.000 abstract description 24
- AVXURJPOCDRRFD-UHFFFAOYSA-N Hydroxylamine Chemical compound ON AVXURJPOCDRRFD-UHFFFAOYSA-N 0.000 abstract 1
- 238000005755 formation reaction Methods 0.000 description 48
- 230000007423 decrease Effects 0.000 description 28
- 230000008569 process Effects 0.000 description 25
- 150000001412 amines Chemical class 0.000 description 23
- 239000002105 nanoparticle Substances 0.000 description 23
- 229940075614 colloidal silicon dioxide Drugs 0.000 description 21
- 238000002347 injection Methods 0.000 description 21
- 239000007924 injection Substances 0.000 description 21
- 239000000440 bentonite Substances 0.000 description 15
- 229910000278 bentonite Inorganic materials 0.000 description 15
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 15
- 238000001914 filtration Methods 0.000 description 14
- 239000007788 liquid Substances 0.000 description 13
- 239000012530 fluid Substances 0.000 description 12
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid group Chemical group C(CCCCCCC\C=C/CCCCCCCC)(=O)O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 12
- 239000000126 substance Substances 0.000 description 10
- 238000011161 development Methods 0.000 description 9
- 230000018109 developmental process Effects 0.000 description 9
- 229930195733 hydrocarbon Natural products 0.000 description 9
- 150000002430 hydrocarbons Chemical class 0.000 description 9
- 238000005259 measurement Methods 0.000 description 9
- 208000033931 Blepharophimosis-ptosis-epicanthus inversus syndrome Diseases 0.000 description 8
- 102100035137 Forkhead box protein L2 Human genes 0.000 description 8
- 101001023356 Homo sapiens Forkhead box protein L2 Proteins 0.000 description 8
- 230000000903 blocking effect Effects 0.000 description 8
- 239000011435 rock Substances 0.000 description 8
- 239000003643 water by type Substances 0.000 description 8
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 6
- 235000011941 Tilia x europaea Nutrition 0.000 description 6
- 238000004364 calculation method Methods 0.000 description 6
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- 239000004571 lime Substances 0.000 description 6
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- 229920000642 polymer Polymers 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 239000004215 Carbon black (E152) Substances 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 4
- 229920006395 saturated elastomer Polymers 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
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- 230000005484 gravity Effects 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000005871 repellent Substances 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- 238000010306 acid treatment Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 230000009931 harmful effect Effects 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 230000002427 irreversible effect Effects 0.000 description 2
- 230000002147 killing effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000000518 rheometry Methods 0.000 description 2
- 238000004078 waterproofing Methods 0.000 description 2
- 241000191291 Abies alba Species 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 235000009754 Vitis X bourquina Nutrition 0.000 description 1
- 235000012333 Vitis X labruscana Nutrition 0.000 description 1
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
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- 238000011049 filling Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011534 incubation Methods 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
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- 238000002156 mixing Methods 0.000 description 1
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- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229920001558 organosilicon polymer Polymers 0.000 description 1
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- 230000035945 sensitivity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
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- 238000010561 standard procedure Methods 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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—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
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
-
- 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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/138—Plastering the borehole wall; Injecting into the formation
-
- 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
- E21B43/32—Preventing gas- or water-coning phenomena, i.e. the formation of a conical column of gas or water around wells
-
- 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
Definitions
- the invention relates to the gas production industry, namely to technologies for preventing breakthroughs of formation water to the bottom of gas, gas condensate or gas hydrate wells.
- Produced waters are a companion of hydrocarbon deposits in most fields. Most often, formation waters are located in lowered zones of gas, gas condensate or gas hydrate formations. However, in some cases, formation waters can be located in the section of the productive part of the reservoir, creating separate aquifers.
- Residual water is the water remaining in the reservoir since the formation of the reservoir.
- Bottom or marginal waters are those that fill the reservoir voids under the reservoir and around it.
- the associated aquifers and productive parts of the reservoirs represent a single hydrodynamic system, the balance of which is disturbed during the development of the reservoir.
- the equilibrium of the formation system is disturbed due to changes in temperature and pressure, filtration of formation fluids in the porous medium begins and their redistribution throughout the formation.
- the efficiency of the development of gas, gas condensate or gas hydrate fields is determined by the degree of development of reserves, which largely depends on the degree of heterogeneity of rocks. Macro- and micro-heterogeneity of formation rocks have a significant effect on the rate of movement of formation waters into the gas-saturated part of the formation. At the same time, in the watered part of the reservoir, there remains trapped gas, the volume of which depends on the properties of the reservoir and the conditions of formation flooding.
- gas hydrate fields are based on the general principle - gas is transferred from a bound hydrate state in reservoir conditions to a free state with subsequent withdrawal from production wells.
- the existing methods of transferring gas from a hydrated state to a free state are based on reducing the reservoir pressure below the hydrate decomposition pressure.
- A.I. Shirkovsky obtained the following formula for determining the gas recovery coefficient for the case of gas displacement by water at constant pressure: where b is the ratio of the selected gas reserves to the initial ones, unit fraction. Organizing n - initial gas saturation, unit fraction gp 0 - coefficient of absolute porosity of the formation, unit fraction s 0 is the ratio of surface tensions at the current pressure at the gas-water interface s r and the initial pressure s Rh m 0 is the ratio of the viscosity of water m B and gas m G at the current pressure p at the gas-water interface and the initial pressure p n
- the residual gas saturation coefficient a is the ratio of the volume of the pore space occupied by the gas at the moment of water breakthrough to the outlet section of the model to the volume of the pore space of the model:
- the method includes perforating the production casing in the interval of the watered formation, injecting a hydrocarbon liquid to remove water from the bottomhole zone, hydrochloric acid treatment of the bottomhole zone to increase permeability, forcing a waterproofing composition into the formation in order to install a water barrier, fixing the screen with a solution of RU microdrills with sulfacell in the watered interval installation of a cement bridge, testing it for strength and tightness, flushing the well and developing the formation.
- compositions can be used as waterproofing compositions: modifier (113-53 or 113-85) + ethyl silicate (ETS-40 or ETS-16) + hydrophobic organosilicon liquid; ethyl silicate (ETS-40 or ETO 16) + synthetic grape acid + calcium chloride (CaCl).
- the main disadvantages of the method are the irreversibility of the blocking effect, the multistage implementation, the complication of the implementation of the known method in the conditions of the oil and gas production field due to the need to perforate the production string and carry out hydrochloric acid treatment of the bottomhole formation zone, the need to reinforce the water barrier, and increase labor costs.
- a rock containing water is hydrophobized using a dispersion containing the following components: A) a water-repellent active substance, B) a hydrophilic water-miscible dispersant, and additionally C) a dispersant.
- A) a water-repellent active substance
- B) a hydrophilic water-miscible dispersant
- C) a dispersant.
- water-repellent substances (A) can be used, in particular, hydrophobized inorganic substances or organosilicon polymer compounds.
- hydrophobized inorganic substances are, in particular, mixed oxides of silicon and aluminum.
- the disadvantages of this method are the complexity of the implementation of the method due to the multicomponent chemical composition and the presence in the composition of polymer compounds, the reaction time of which under these conditions is unpredictable, complexity due to the need to prepare the composition on an industrial scale, as well as injection into the well and filtration into the depth of the formation, which does not makes it possible to effectively prevent the breakthrough of formation water into the well, the impossibility of regulating the rheological parameters of polymer systems used as a water-repellent substance, and the irreversibility of the blocking effect of the action.
- the multicomponent chemical composition proposed in the method is sensitive to mineralization and the chemical composition of the dispersion medium - water.
- the disadvantages of this method are a decrease in the efficiency of well operation due to the use of polymer compounds, which are characterized by high sensitivity to salinity and chemical composition of process and formation water, and due to unpredictable rheology during injection into the well and filtration into the depth of the formation, as well as an irreversible blocking effect.
- the method includes lowering the coiled tubing into the inner cavity of the gas well tubing to the bottom and cleaning the bottom from liquid and mechanical impurities, filling the well with gas condensate, then lifting the coiled tubing to the tubing shoe, pumping into the perforation interval through the annular space between the coiled tubing and the tubing of the first pack of a hydrophobizing composition containing ethyl silicate ETS-40 of 10% concentration in gas condensate in a volume of 1-2 m 3 for each meter of gas-saturated formation thickness with its pushing into the formation and the formation of a water barrier in the productive formation displacing formation water from the bottom to the depth of the formation along the radius.
- a hydrophobizing composition containing ethyl silicate ETS-40 of 10% concentration in gas condensate in a volume of 1-2 m 3 for each meter of gas-saturated formation thickness with its pushing into the formation and the formation of a water barrier in the productive formation displacing formation water from
- the subsequent pumping through the annular space of the second pack of hydrophobizing composition containing ethyl silicate ETS-40 of 100% concentration is carried out in the amount of 0.4-0.6 m 3 per meter of effective thickness of the formation with its forcing into the formation with gas condensate in the volume of the production tubing and the inner space of the well - the production casing below the production tubing shoe.
- the coiled tubing is re-lowered into the gas-water contact interval, the hydrophobic organosilicon liquid GKZH-11N is pumped through the coiled tubing in a volume of 0.10-0.15 m 3 for each meter of the aquifer thickness of the formation, backwashing of the well in the volume of 2 cycles with back pressure ...
- the coiled tubing is removed from the well and the latter is left to react under pressure.
- the disadvantages of this method are the technological complexity of the implementation of the process of injection of compositions into the well, as well as a decrease in the efficiency of limiting the breakthrough of formation water into the production well due to the use of chemical compositions of irreversible and uncontrolled blocking action with a low depth of penetration into the depth of the formation.
- N ° 2136877 (IPC E21B 43/32, E21B 33/13, published 09/10/1999)
- the method includes injecting liquid hydrocarbons into the tubing after the well is shut down and starting the well after a certain time, while the calculated amount of liquid hydrocarbons is injected in portions, at certain intervals, and waste oil products with additives of surfactants are used as liquid hydrocarbons. substances contributing to the hydrophobization of reservoir rocks in the bottomhole zone.
- liquid hydrocarbons are injected when traces of formation water appear in the product of a gas well.
- the disadvantage of this method is a decrease in the effectiveness of preventing the breakthrough of formation water into a production well under conditions of high drops in bottomhole pressures created during the operation of gas and gas condensate wells, due to the use of a low-viscosity composition aimed exclusively at hydrophobization of the surface of filtration channels.
- the invention provides for the creation of a method for the development of gas hydrate deposits, providing an increase in gas production and extension of the period of non-hydrate wells operation by reducing the water saturation in the zone located below the bottom of the gas hydrate formation, and, as a consequence, reducing the likelihood of self-preservation of hydrates.
- the method consists in the fact that the well is drilled with the opening of the productive formation and the underlying isolated aquifer.
- tubing with a submersible pump unit is lowered into the well and the gas-liquid mixture is sampled at the boundary of the gas-water contact of the productive formation.
- the separation of the gas-liquid mixture is carried out in the well.
- gas production is carried out along the annulus, and liquids with dissolved gas - through the tubing, which is pumped into the underlying aquifer using the aforementioned submersible pumping unit.
- the disadvantage of this method is the impossibility of regulating the process of hydrate formation under conditions of multiphase filtration of a water-gas mixture.
- This method does not provide for the creation of a waterproof screen in the bottomhole zone of a gas reservoir, but, on the contrary, is aimed at opening the underlying aquifer with their subsequent joint exploitation, i.e.
- the considered method does not provide for the prevention of breakthrough of formation water into the production well, and therefore is not effective.
- a method is proposed to prevent the breakthrough of formation water to the bottom of production wells, based on the injection of an emulsion-suspension system with silicon dioxide nanoparticles into the bottomhole formation zone (BHZ).
- Production wells within the scope of the present invention are gas, gas condensate or gas hydrate wells.
- the essence of the invention lies in the fact that the method includes pumping into the bottomhole formation zone of a shielding pack, which is used as an emulsion-suspension system (ESS) with nanoparticles of silicon dioxide, containing (% vol.): Diesel fuel or prepared oil from the point of preparation and pumping of oil - 5-12, emulsifier - 2-3, colloidal nanoparticles of silicon dioxide - 1.0-1.5, an aqueous solution of calcium chloride or potassium chloride - the rest, and as an emulsifier, a composition containing (vol.%): Esters of higher unsaturated fatty acids and resin acids - 40-42, amine oxide - 0.7-1, high-molecular organic heat stabilizer - 0.5-1, diesel fuel - the rest, as colloidal silicon dioxide nanoparticles use a composition containing (vol.%): silicon dioxide - 31-32.5 v propylene glycol monomethyl ether - 67-68, water - the rest, or silicon dioxide - 30-31
- the technical result of the invention is to reduce the water cut of the well product, reduce the harmful effect on the environment due to the reversibility of the blocking effect of the shielding pack, simplify the implementation of the method due to the one-stage technology, the ability to regulate rheological parameters of the shielding pack, reducing labor costs and increasing the technological efficiency of the operation of gas, gas condensate or gas hydrate wells.
- FIG. 1 shows a table revealing the technique and equipment for the preparation and injection of ESS into a production well.
- FIG. 2 shows a table illustrating the results of measurements of the ESS density (the density of the water component is 1200 kg / m 3 ).
- FIG. 3 shows a table illustrating the results of measurements of the thermal stability of ESS at 140 ° C.
- FIG. 4 is a table illustrating the results of measurements of the dynamic viscosity of the ESS.
- FIG. 5 shows a table illustrating the dependence of the effective viscosity of the ESS on the test time (dynamic stability) at a temperature of 20.0 ° C and a shear rate of 450.0 s 1 .
- the method is based on the radial placement of the estimated volume of the ESS at the boundary of the productive and aquifer, which makes it possible to create an impermeable screen for filtration of formation water into the near-wellbore zone of the productive formation.
- the unique physical properties of ESS make it possible to effectively apply the method in formations with abnormal temperatures, as well as to regulate the blocking properties of the screening unit, depending on the reservoir conditions and well operation modes by changing the volume ratio of the components.
- the main unique physical properties of ESS are high thermal (140 ° C) and filtration stability, regulation of rock surface wettability, self-regulating viscosity during injection and during filtration in reservoir conditions.
- Widely adjustable shear gradients and dynamic viscosity along with the stability and surface activity of ESS provide reliable blocking of aquifers and facilitate the flow of hydrocarbons into the well.
- a radial shielding unit is formed at the interface between the aquifer and gas strata, the dimensions which depend on the density of the production wells grid and well operation modes.
- the effective viscosity of the system depends on the volumetric water content and the filtration rate, increasing with an increase in the volumetric water content and a decrease in the filtration rate. This explains the self-regulation of viscosity properties, velocity and direction of ESS filtration into the depth of the formation.
- the perforation interval and well sump must be free from massive sediments, deposits and foreign objects that impede the filtration of liquids into the perforated intervals;
- - reservoir temperature is not limited, but must be determined before starting work
- the bottomhole formation zone is treated with one of the standard methods of increasing the injectivity of the well.
- V is the estimated volume, m 3 ;
- R out is the outer radius of the rim of the emulsion system, m; r w - well radius, m; h - formation thickness, m; t - coefficient of reservoir porosity, unit fraction;
- the presented method takes into account the geometrical dimensions of the area of influence, the capacitive characteristics of the formation.
- the use of the associated water saturation and residual gas saturation in the calculation makes it possible to take into account the volume of the pore space that is not involved in the filtration process.
- ESS preparation is carried out on the unit for the preparation of emulsion systems (BPES), which consists of a process vessel with a paddle stirrer installed inside with a rotation speed of at least 90 rpm. and an external centrifugal pump for circulation of the ESS components.
- BPES emulsion systems
- the necessary technological equipment for the preparation and injection of ESS into production wells is shown in Fig. one.
- the process of preparing an ESS using a BPES is a step-by-step process and includes the following steps:
- the components are introduced into the hydrocarbon base through an ejector using a vacuum hose.
- the loading speed of the components is limited by the suction capacity of the ejector.
- Technological tanks should be equipped with paddle stirrers, ensuring a constant and uniform distribution of reagents throughout the volume. To ensure and maintain the required stability properties of the systems, it is recommended to use paddle mixers with a reversible direction of rotation.
- the quality of preparation and the stability of the properties of the systems depends on the completeness of the mixing coverage of the entire volume of the BPES technological container, the purity of the technological containers used, the rate of introduction of the components and the dispersion time. It is recommended to use a container with "beveled" corners (close to cylindrical shape).
- Quality control of ESS preparation is carried out by checking the sedimentation stability of the systems. The test is considered positive if, after holding the sample with ESS with a volume of 200 ml. at room temperature for 2 hours, no more than 2% of the volume of the water component of the ESS was separated.
- Fig. 1 The number and type of special equipment and equipment for performing well operations are shown in Fig. 1. The calculation was made on condition of preparation of ESS using BPES. The presented list of equipment and special equipment is basic and may include additional names depending on the conditions of work, the location of the mortar unit, technological parameters and design features of the well.
- the discharge line is equipped with a non-return valve.
- the method is carried out by continuous injection of the estimated volume of the ESS into the production well with constant monitoring of the main technological parameters of the injection.
- ESS contains diesel fuel or treated oil from the oil preparation and pumping station, an emulsifier, colloidal nanoparticles of silicon dioxide, an aqueous solution of calcium chloride or potassium chloride.
- ESS may contain (% vol.): Diesel fuel or prepared oil from the point of preparation and pumping of oil - 5-12, emulsifier - 2-3, colloidal nanoparticles of silicon dioxide - 1.0-1.5, aqueous solution of calcium chloride or potassium chloride - the rest.
- the emulsifier may contain (% vol.): Esters of higher unsaturated fatty acids and resin acids - 40-42, amine oxide - 0.7-1, high-molecular organic heat stabilizer - 0.5-1, diesel fuel - the rest.
- Colloidal nanoparticles of silicon dioxide may contain (% vol.):
- Process fluids should be injected continuously at a rate that prevents the float gas from decreasing the density of process fluids.
- the rate of injection of process fluids is determined by the magnitude of the reservoir pressure and should be maximum, exceeding the productivity of the well, provided that the pressure in the well does not exceed the maximum permissible (according to the pressure conditions of the casing pressure).
- the required density of process fluids is determined on the basis of a calculation based on the condition that a column of process fluids creates a pressure that exceeds the current reservoir pressure by a safety factor.
- M p is the amount of reagent, kg
- U r is the specific gravity of the reagent, g / cm 3 ;
- V p is the required volume of an aqueous solution, m 3 .
- the measurement of thermal stability was carried out by holding the ESS samples in measuring hermetically sealed cylinders in a heating cabinet for 8 hours at a given temperature of 140 ° C. The test was considered positive if, after 8 h of incubation, no more than 2 vol.% Of water from the total volume of the aqueous phase separated from the ESS. As a result of experiments, it was determined that all samples are stable.
- ESS was injected into a gas well in a volume of 426 m 3 of the following composition,% vol: diesel fuel - 5, emulsifier - 2, colloidal nanoparticles of silicon dioxide - 1.0, an aqueous solution of potassium chloride with a density of 1120 kg / m 3 -92.0.
- the emulsifier contains,% by volume: esters of higher unsaturated fatty acids (linoleic) and resin acids - 40, amine oxide - 0.7, high molecular weight organic thermostabilizer (lime suspension in diesel fuel) - 0.5, diesel fuel - 58.8.
- Colloidal silicon dioxide nanoparticles contain,% vol: silicon dioxide - 31.0 in propylene glycol monomethyl ether - 67.0, water - 2.0.
- ESS was injected into a gas well in a volume of 302 m 3 of the following composition,% vol: diesel fuel - 7, emulsifier - 2.5, colloidal nanoparticles of silicon dioxide - 1.25, an aqueous solution of potassium chloride with a density of 1170 kg / m 3 - 89.25.
- the emulsifier contains,% by volume: esters of higher unsaturated fatty acids (linoleic) and resin acids - 41, amine oxide - 0.8, high molecular weight organic heat stabilizer (lime suspension in diesel fuel) - 0.7, diesel fuel - 57.5.
- Colloidal silicon dioxide nanoparticles contain,% vol: silicon dioxide - 32.0 in propylene glycol monomethyl ether - 67.0, water - 1.0.
- ESS was injected into a gas well in a volume of 414 m 3 of the following composition,% vol: diesel fuel - 10, emulsifier - 3, colloidal nanoparticles of silicon dioxide - 1.5, an aqueous solution of potassium chloride with a density of 1170 kg / m 3 - 85.5.
- the emulsifier contains,% by volume: esters of higher unsaturated fatty acids (linoleic) and resin acids - 42, amine oxide - 1.0, high-molecular organic heat stabilizer (lime suspension in diesel fuel) - 1.0, diesel fuel - 56.0.
- Colloidal silicon dioxide nanoparticles contain,% vol: silicon dioxide - 32.5 in propylene glycol monomethyl ether - 67.0, water - 0.5.
- ESS was injected into a gas well in a volume of 422 m 3 of the following composition,% vol: diesel fuel - 12, emulsifier - 3, colloidal nanoparticles of silicon dioxide - 1.5, an aqueous solution of potassium chloride with a density of 1230 kg / m 3 - 83.5.
- the emulsifier contains,% by volume: esters of higher unsaturated fatty acids (linoleic) and resin acids - 42, amine oxide - 1.0, high-molecular organic heat stabilizer (lime suspension in diesel fuel) - 1.0, diesel fuel - 56.0.
- Colloidal nanoparticles of silicon dioxide contain,% vol: silicon dioxide - 31.0 in propylene glycol monomethyl ether - 68.0, water - 1.0.
- ESS was injected into a gas well in a volume of 433 m 3 of the following composition,% vol: diesel fuel - 12, emulsifier - 3, colloidal nanoparticles of silicon dioxide - 1.5, an aqueous solution of potassium chloride with a density of 1200 kg / m 3 - 83.5.
- the emulsifier contains,% by volume: esters of higher unsaturated fatty acids (linoleic) and resin acids - 42, amine oxide - 0.8, high-molecular organic heat stabilizer (suspension of bentonite in diesel fuel) - 0.9, diesel fuel - 56.3.
- Colloidal silicon dioxide nanoparticles contain,% vol: silicon dioxide - 30.0, isopropanol - 68 and methyl alcohol - 2.0.
- ESS was injected into the gas well in a volume of 378 m 3 of the following composition,% vol: diesel fuel - 11, emulsifier - 2.8, colloidal nanoparticles of silicon dioxide - 1.3, an aqueous solution of potassium chloride with a density of 1200 kg / m 3 - 84.9.
- the emulsifier contains,% by volume: esters of higher unsaturated fatty acids (oleic) and resin acids - 40, amine oxide - 0.7, high molecular weight organic heat stabilizer (suspension of bentonite in diesel fuel) - 0.5, diesel fuel - 58.8.
- Colloidal nanoparticles of silicon dioxide contain,% vol: silicon dioxide - 30.5 in isopropanol - 67.5 and methyl alcohol - 2.0.
- the emulsifier contains,% by volume: esters of higher unsaturated fatty acids (oleic) and resin acids - 41, amine oxide - 1.0, high molecular weight organic heat stabilizer (bentonite suspension in diesel fuel) - 1.0, diesel fuel - 57.0.
- Colloidal silicon dioxide nanoparticles contain,% vol: silicon dioxide - 31.0, isopropanol - 68 and methyl alcohol - 1.0.
- ESS was injected into a gas well in a volume of 415 m 3 of the following composition,% vol: diesel fuel - 7, emulsifier - 2.0, colloidal nanoparticles of silicon dioxide - 1.4, an aqueous solution of calcium chloride with a density of 1225 kg / m 3 - 89.6.
- the emulsifier contains,% by volume: esters of higher unsaturated fatty acids (oleic) and resin acids - 40.5, amine oxide - 0.8, high-molecular organic heat stabilizer (suspension of bentonite in diesel fuel) - 0.6, diesel fuel - 58.1.
- Colloidal silicon dioxide nanoparticles contain,% vol: silicon dioxide - 31.0 in ethylene glycol - 69.0.
- ESS was injected into the gas condensate well in the amount of 415 m 3 of the following composition,% vol .: treated oil from the oil preparation and pumping station - 7, emulsifier - 2.0, colloidal nanoparticles of silicon dioxide - 1.4, an aqueous solution of calcium chloride with a density of 1225 kg / m 3 - 89.6.
- the emulsifier contains,% by volume: esters of higher unsaturated fatty acids (oleic) and resin acids - 40.5, amine oxide - 0.8, high-molecular organic heat stabilizer (suspension of bentonite in diesel fuel) - 0.6, diesel fuel - 58.1.
- Colloidal silicon dioxide nanoparticles contain,% vol: silicon dioxide - 31.0 in isopropanol - 67 and methyl alcohol - 2.0.
- ESS was injected into the gas condensate well in a volume of 504 m 3 of the following composition,% vol: treated oil from the oil preparation and pumping station - 9, emulsifier - 2.5, colloidal nanoparticles of silicon dioxide - 1.5, aqueous solution of calcium chloride with a density of 1210 kg / m 3 - 87.0.
- the emulsifier contains,% vol: esters of higher unsaturated fatty acids (oleic) and resin acids - 42.0, amine oxide - 0.7, high molecular weight organic heat stabilizer (bentonite suspension in diesel fuel) - 1.0, diesel fuel - 56.3.
- Colloidal silicon dioxide nanoparticles contain,% vol: silicon dioxide - 31.0, isopropanol - 67 and methyl alcohol - 2.0.
- ESS was injected into the gas condensate well in a volume of 508 m 3 of the following composition,% vol: treated oil from the oil preparation and pumping station - 10, emulsifier - 3.0, colloidal nanoparticles of silicon dioxide - 1.2, aqueous solution of calcium chloride with a density of 1210 kg / m 3 - 85.8.
- the emulsifier contains,% vol: esters of higher unsaturated fatty acids (oleic) and resin acids - 40.0, amine oxide - 0.7, high molecular weight organic heat stabilizer (suspension bentonite in diesel fuel) - 1.0, diesel fuel - 58.3.
- Colloidal nanoparticles of silicon dioxide contain,% vol: silicon dioxide - 29.0 in ethylene glycol - 71.0.
- the emulsifier contains,% vol: esters of higher unsaturated fatty acids (linoleic) and resin acids - 41.0, amine oxide - 0.9, high molecular weight organic heat stabilizer (bentonite suspension in diesel fuel) - 0.8, diesel fuel - 57.3.
- Colloidal nanoparticles of silicon dioxide contain,% vol: silicon dioxide - 30.0 in ethylene glycol - 70.0.
- the emulsifier contains,% vol: esters of higher unsaturated fatty acids (linoleic) and resin acids - 41.0, amine oxide - 0.9, high molecular weight organic heat stabilizer (bentonite suspension in diesel fuel) - 0.8, diesel fuel - 57.3.
- Colloidal silicon dioxide nanoparticles contain,% vol: silicon dioxide - 31.0 in ethylene glycol - 69.0.
- ESS was injected into the gas condensate well in the amount of 361 m 3 of the following composition,% vol .: treated oil from the oil preparation and pumping station - 5, emulsifier - 2.0, colloidal nanoparticles of silicon dioxide - 1.0, an aqueous solution of potassium chloride with a density of 1220 kg / m 3 - 92.0.
- the emulsifier contains, vol%: esters of higher unsaturated fatty acids (linoleic) and resin acids - 42.0, amine oxide - 1.0, high molecular weight organic heat stabilizer (bentonite suspension in diesel fuel) - 1.0, diesel fuel - 56.0.
- Colloidal silicon dioxide nanoparticles contain,% vol: silicon dioxide - 31.0 in ethylene glycol - 69.0.
- ESS was injected into the gas condensate well in a volume of 452 m 3 of the following composition,% vol: treated oil from the oil preparation and pumping station - 6, emulsifier - 3.0, colloidal nanoparticles of silicon dioxide - 1.4, aqueous solution of potassium chloride with a density of 1220 kg / m 3 - 89.6.
- the emulsifier contains, vol%: esters of higher unsaturated fatty acids (linoleic) and resin acids - 42.0, amine oxide - 1.0, high molecular weight organic heat stabilizer (bentonite suspension in diesel fuel) - 1.0, diesel fuel - 56.0.
- Colloidal silicon dioxide nanoparticles contain,% vol: silicon dioxide - 31.0 in ethylene glycol - 69.0.
- ESS was injected into the gas condensate well in a volume of 445 m 3 of the following composition,% vol: treated oil from the oil preparation and pumping station - 5, emulsifier - 3.0, colloidal nanoparticles of silicon dioxide - 1.5, an aqueous solution of potassium chloride with a density of 1210 kg / m 3 - 90.5.
- the emulsifier contains, vol%: esters of higher unsaturated fatty acids (oleic) and resin acids - 42.0, amine oxide - 1.0, high molecular weight organic heat stabilizer (bentonite suspension in diesel fuel) - 1.0, diesel fuel - 56.0.
- Colloidal silicon dioxide nanoparticles contain,% vol: silicon dioxide - 31.0 in propylene glycol monomethyl ether - 67.0, water - 2.0. The well was completed and put into operation with a decrease in water cut by
- the emulsifier contains, vol%: esters of higher unsaturated fatty acids (oleic) and resin acids - 42.0, amine oxide - 1.0, high molecular weight organic heat stabilizer (bentonite suspension in diesel fuel) - 1.0, diesel fuel - 56.0.
- Colloidal silicon dioxide nanoparticles contain,% vol: silicon dioxide - 32.0 in propylene glycol monomethyl ether - 67.0, water - 1.0.
- the gas hydrate produced wellbore download ESS in volume 1080 m 3 with the following composition,% by vol .: oil prepared from step preparation and pumping of oil - 9.0 Emulsifier - 2.5 colloidal silicon dioxide nanoparticles - 1.5, an aqueous solution of potassium chloride density 1205 kg / m 3 - 87.0.
- the emulsifier contains, vol%: esters of higher unsaturated fatty acids (oleic) and resin acids - 41.0, amine oxide - 0.7, high molecular weight organic heat stabilizer (suspension of bentonite in diesel fuel) - 0.5, diesel fuel - 57.8.
- Colloidal silicon dioxide nanoparticles contain,% vol: silicon dioxide - 32.5 in propylene glycol monomethyl ether - 67.0, water - 0.5.
- ESS was injected into the gas hydrate well in the amount of 905 m 3 of the following composition,% vol .: treated oil from the oil preparation and pumping station - 5.0, emulsifier - 3.0, colloidal nanoparticles of silicon dioxide - 1.5, an aqueous solution of potassium chloride with a density of 1190 kg / m 3 - 90.5.
- the emulsifier contains, vol%: esters of higher unsaturated fatty acids (oleic) and resin acids - 41.0, amine oxide - 0.7, high molecular weight organic heat stabilizer (suspension of bentonite in diesel fuel) - 0.5, diesel fuel - 57.8.
- Colloidal nanoparticles of silicon dioxide contain,% vol: silicon dioxide - 30.0 in isopropanol - 68 and methyl alcohol - 2.0.
- the gas hydrate produced well in a volume of injection ESS 982 m 3 with the following composition,% by vol .: oil prepared from step preparation and pumping of oil - 8.0 Emulsifier - 3.0 colloidal silicon dioxide nanoparticles - 1.3, an aqueous solution of calcium chloride density 1190 kg / m 3 - 87.7.
- the emulsifier contains,% by volume: esters of higher unsaturated fatty acids (oleic) and resin acids - 41.5, amine oxide - 0.9, high-molecular organic heat stabilizer (suspension of lime in diesel fuel) - 1.0, diesel fuel - 56.6.
- Colloidal nanoparticles of silicon dioxide contain,% vol: silicon dioxide - 30.5 in isopropanol - 67.5 and methyl alcohol - 2.0.
- ESS was injected into the gas hydrate well in a volume of 1095 m 3 of the following composition,% vol: treated oil from the oil preparation and pumping station - 10.0, emulsifier - 2.5, colloidal nanoparticles of silicon dioxide - 1.2, aqueous solution of calcium chloride with a density of 1175 kg / m 3 - 86.3.
- the emulsifier contains,% by volume: esters of higher unsaturated fatty acids (oleic) and resin acids - 42.0, amine oxide - 1.0, high-molecular organic heat stabilizer (lime suspension in diesel fuel) - 0.7, diesel fuel - 56.3.
- Colloidal nanoparticles silicon dioxide contains,% vol .: silicon dioxide - 31.0 in isopropanol - 68 and methyl alcohol - 1.0.
- the invention makes it possible to optimize the technological process of treating the bottomhole zone of the productive formation, to reduce the water cut of the well production, to reduce the harmful effect on the environment due to the reversibility of the blocking effect of the screening unit, to simplify the implementation of the method due to the single-stage technology, to regulate the rheological parameters of the screening unit, to reduce labor costs and to increase the technological efficiency of operation of gas, gas condensate or gas hydrate wells.
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JP2022544789A JP7404549B2 (ja) | 2020-01-21 | 2020-12-08 | 坑井の坑底に侵入する層状水を防ぐ方法 |
CA3165024A CA3165024A1 (en) | 2020-01-21 | 2020-12-08 | Method for preventing stratal water from breaking through into bottom holes of wells |
US17/758,999 US20230033325A1 (en) | 2020-01-21 | 2020-12-08 | Method for preventing stratal water from breaking through into bottom holes of wells |
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RU2174587C2 (ru) * | 1999-09-07 | 2001-10-10 | Тарасов Сергей Борисович | Способ временной изоляции поглощающих пластов |
US20090211758A1 (en) * | 2005-12-22 | 2009-08-27 | Bragg James R | Method of Oil Recovery Using a Foamy Oil-External Emulsion |
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US3060210A (en) * | 1960-05-12 | 1962-10-23 | Petrolite Corp | Polyaminomethyl phenols |
US3956145A (en) * | 1972-12-27 | 1976-05-11 | Texaco Inc. | Fluid for injection into a subterranean reservoir to displace hydrocarbons in the reservoir |
US5927404A (en) * | 1997-05-23 | 1999-07-27 | Exxon Production Research Company | Oil recovery method using an emulsion |
EP2190942B1 (en) * | 2007-09-13 | 2017-06-14 | Halliburton Energy Services, Inc. | Methods of using colloidal silica based gels |
US20140116695A1 (en) * | 2012-10-30 | 2014-05-01 | Halliburton Energy Services, Inc. | Emulsified acid with hydrophobic nanoparticles for well stimulation |
WO2016011284A2 (en) * | 2014-07-18 | 2016-01-21 | Cesi Chemical, Inc. | Methods and compositions comprising particles for use in oil and/or gas wells |
RU2670808C9 (ru) * | 2017-07-21 | 2018-11-28 | Общество с ограниченной ответственностью "ОИЛМАЙНД" | Способ увеличения нефтеотдачи пластов (варианты) |
RU2659046C1 (ru) * | 2017-08-21 | 2018-06-27 | Виталий Вячеславович Сергеев | Способ глушения нефтяных и газовых скважин |
RU2670308C1 (ru) * | 2017-11-13 | 2018-10-22 | Общество с ограниченной ответственностью "Джиар Петролеум" | Способ ликвидации поглощений бурового раствора при строительстве нефтяных и газовых скважин |
RU2700851C1 (ru) * | 2018-06-18 | 2019-09-23 | Общество с ограниченной ответственностью "ВИ-ЭНЕРДЖИ" | Способ селективной обработки призабойной зоны пласта |
US11620023B1 (en) * | 2022-04-25 | 2023-04-04 | Himax Technologies Limited | Touch event processing circuit |
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- 2020-12-08 WO PCT/RU2020/050368 patent/WO2021150142A1/ru active Application Filing
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RU2174587C2 (ru) * | 1999-09-07 | 2001-10-10 | Тарасов Сергей Борисович | Способ временной изоляции поглощающих пластов |
US20090211758A1 (en) * | 2005-12-22 | 2009-08-27 | Bragg James R | Method of Oil Recovery Using a Foamy Oil-External Emulsion |
RU2631460C1 (ru) * | 2016-09-02 | 2017-09-22 | Общество с ограниченной ответственностью "ВИ-ЭНЕРДЖИ" | Способ обработки призабойной зоны пласта |
RU2670307C1 (ru) * | 2017-11-13 | 2018-10-22 | Общество с ограниченной ответственностью "Джиар Петролеум" | Способ предупреждения проявлений при строительстве нефтяных и газовых скважин |
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