Compound for water isolation of low-temperature beds |
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IPC classes for russian patent Compound for water isolation of low-temperature beds (RU 2250367):
Method for isolating fluid-influx area in a well / 2245988
Method includes forming a screen of viscous-elastic mass in well via interaction of working liquid pumped into well in form of alkali waste of kaprolaktam production or its solution, with influx liquid. Necessary speed of transformation of viscous-elastic mass and intensiveness of filling of well adjacent area with it is adjusted by mode of pressing of working liquid into influx zone. For this purpose pressure increase is alternated with pressure decrease. Pressure is decreased for 10-50% from achieved maximum pressure. Relation of exposure time for increased pressure to decreased pressure time is taken in limits 1.1-5.0.
 Method for blocking high-penetrable watered oil beds / 2244822
Method includes pumping, in carrying liquid - waterless mixture of oil products containing waterless oil, of powder-like water-soluble polymer and connector in amount of 0.05-0.2% for mass of carrying liquid or 30-100% for mass of power-like water-soluble polymer, as said mixture a mixture of waterless oil and light oil products processed in relation 0.1:9.9-9.9:0.1 is used, and as connector - dry aluminum sulfate, chrome sulfate, iron sulfate, magnesium sulfate, copper sulfate or their mixtures, or their alums with common formula MIMIII(SO4).2
 Method for blocking high-penetrable watered oil beds / 2244821
Method includes pumping, in carrying liquid - waterless mixture of oil products containing waterless oil, of powder-like water-soluble polymer and connector in amount of 0.05-0.2% for mass of carrying liquid or 30-100% for mass of power-like water-soluble polymer, as said mixture a mixture of waterless oil and light oil products processed in relation 0.1:9.9-9.9:0.1 is used, and as connector - dry aluminum acetate, chrome acetate, iron acetate, magnesium acetate, copper acetate, barium acetate, manganese acetate, calcium acetate or their mixtures.
 Method for blocking high-penetrable watered oil beds / 2244820
Method includes pumping, in carrying liquid - waterless mixture of oil products containing waterless oil, of powder-like water-soluble polymer and connector in amount of 0.05-0.2% for mass of carrying liquid or 30-100% for mass of power-like water-soluble polymer, as said mixture a mixture of waterless oil and light oil products processed in relation 0.1:9.9-9.9:0.1 is used, and as connector - dry aluminum nitrate, chrome nitrate, iron nitrate, magnesium nitrate, barium nitrate, calcium nitrate or their mixtures.
Composition for confinement of water inflow into well / 2244819
Composition is made up of 90.0-95.0% sodium silicate solution with concentration 1.36 g/cm3 and silica modulus 3.0, 3.0-8.0% alkali metal silicofluoride, 1.0-4.0% wood flour, and 1.0-4.0% triacetine. Composition can be used during repair operations on oil production stings, when disabling formations, and when confining water inflow.
Hydrophobic agent for treatment on bottom area of formation / 2244818
Bottom area of formation is treated with hydrophobic agent, in particular solution of ethylene/vinyl acetate copolymer expressed by general formula [-CH2-CH2-C(CH3COO)H-CH2-]n, where n=7000-10000, in hydrocarbon solvent.
Method for isolating penetrable beds in a well / 2244803
Method includes pumping of portion of water-absorbing acryl polymer, exposure of it in a well, pumping of second portion of same polymer, tempered on fresh water with concentration 1-20%, buffer of fresh water dries up, and before and after pumping of second portion of water-absorbing polymer, tempered on hydrocarbon liquid with concentration 10-20%, buffer of hydrocarbon liquid is pumped in, besides, said 2-portion systems are pumped into well multiple times.
 Method of insulating formation water inflow / 2244115
Invention relates to insulating formation water inflow in gas and gas condensate wells with the aid of coltubing techniques. In particular, flexible conduit is descended through the tube space of well operated under pressure to the bottom with the aid of coltubing installation. Latches on tube and annulus spaces are opened. Well hole is filled through flexible conduit with gas condensate. Grouting mortar is prepared in preparation block by mixing cement mortar with setting retardant and mortar flowability enhancer in a calculated amount needed to prevent formation water inflow. Further, flushing fluid, e.g. methanol, is pumped through flexible conduit in amount constituting 0.3-0.6 volume of flexible conduit. Annulus space is closed and grouting mortar is pumped through flexible conduit in amount required to fill well hole in interval of water-inflow part of formation. When grouting mortar in hole rises to specified height, tube space is closed and grouting mortar contained in flexible conduit is forced into water-inflow part of formation by in series pumped flushing fluid and displacing solution: for example first methanol in amount 1.0-1.3 volumes of flexible conduit and then gas condensate in required amount, which however does not exceed internal volume of flexible conduit, until grouting mortar begins being pumped in amount of 0.3-0.5 volumes of flexible conduit. Then tube and annulus spaces of well are opened and gas condensate begins being simultaneously pumped into tube and annulus spaces in order to prevent rise of grouting mortar therein above interval of the water-inflow part of formation. Thereafter, bottom of flexible conduit is raised by 1 m above indicated interval and excess of grouting mortar is cut and washed away with gas condensate passed through flexible conduit into tube space, where excess grouting mortar remains in fluid state. After cement setting expectation time, flexible conduit is descended to the top of cement column and tests the latter for strength applying 4.0-5.0 kN loading by means of injector of coltubing installation through flexible conduit. Finally, cement bridging is subjected to hydraulic pressurization and flexible conduit is removed from well.
 The composition for the repair and waterproofing works in oil and gas wells / 2242606
The invention relates to the oil and gas industry, in particular for carrying out waterproofing works and fastening the near-well zone of the reservoir (PPP) oil and gas wells
 Hydrophobic emulsion / 2241830
The invention relates to the oil industry, in particular to the compounds for waterproofing works, as well as killing fluids oil wells
Method of insulating formation water inflow / 2244115
Invention relates to insulating formation water inflow in gas and gas condensate wells with the aid of coltubing techniques. In particular, flexible conduit is descended through the tube space of well operated under pressure to the bottom with the aid of coltubing installation. Latches on tube and annulus spaces are opened. Well hole is filled through flexible conduit with gas condensate. Grouting mortar is prepared in preparation block by mixing cement mortar with setting retardant and mortar flowability enhancer in a calculated amount needed to prevent formation water inflow. Further, flushing fluid, e.g. methanol, is pumped through flexible conduit in amount constituting 0.3-0.6 volume of flexible conduit. Annulus space is closed and grouting mortar is pumped through flexible conduit in amount required to fill well hole in interval of water-inflow part of formation. When grouting mortar in hole rises to specified height, tube space is closed and grouting mortar contained in flexible conduit is forced into water-inflow part of formation by in series pumped flushing fluid and displacing solution: for example first methanol in amount 1.0-1.3 volumes of flexible conduit and then gas condensate in required amount, which however does not exceed internal volume of flexible conduit, until grouting mortar begins being pumped in amount of 0.3-0.5 volumes of flexible conduit. Then tube and annulus spaces of well are opened and gas condensate begins being simultaneously pumped into tube and annulus spaces in order to prevent rise of grouting mortar therein above interval of the water-inflow part of formation. Thereafter, bottom of flexible conduit is raised by 1 m above indicated interval and excess of grouting mortar is cut and washed away with gas condensate passed through flexible conduit into tube space, where excess grouting mortar remains in fluid state. After cement setting expectation time, flexible conduit is descended to the top of cement column and tests the latter for strength applying 4.0-5.0 kN loading by means of injector of coltubing installation through flexible conduit. Finally, cement bridging is subjected to hydraulic pressurization and flexible conduit is removed from well.
Method for isolating penetrable beds in a well / 2244803
Method includes pumping of portion of water-absorbing acryl polymer, exposure of it in a well, pumping of second portion of same polymer, tempered on fresh water with concentration 1-20%, buffer of fresh water dries up, and before and after pumping of second portion of water-absorbing polymer, tempered on hydrocarbon liquid with concentration 10-20%, buffer of hydrocarbon liquid is pumped in, besides, said 2-portion systems are pumped into well multiple times.
Hydrophobic agent for treatment on bottom area of formation / 2244818
Bottom area of formation is treated with hydrophobic agent, in particular solution of ethylene/vinyl acetate copolymer expressed by general formula [-CH2-CH2-C(CH3COO)H-CH2-]n, where n=7000-10000, in hydrocarbon solvent.
Composition for confinement of water inflow into well / 2244819
Composition is made up of 90.0-95.0% sodium silicate solution with concentration 1.36 g/cm3 and silica modulus 3.0, 3.0-8.0% alkali metal silicofluoride, 1.0-4.0% wood flour, and 1.0-4.0% triacetine. Composition can be used during repair operations on oil production stings, when disabling formations, and when confining water inflow.
Method for blocking high-penetrable watered oil beds / 2244820
Method includes pumping, in carrying liquid - waterless mixture of oil products containing waterless oil, of powder-like water-soluble polymer and connector in amount of 0.05-0.2% for mass of carrying liquid or 30-100% for mass of power-like water-soluble polymer, as said mixture a mixture of waterless oil and light oil products processed in relation 0.1:9.9-9.9:0.1 is used, and as connector - dry aluminum nitrate, chrome nitrate, iron nitrate, magnesium nitrate, barium nitrate, calcium nitrate or their mixtures.
Method for blocking high-penetrable watered oil beds / 2244821
Method includes pumping, in carrying liquid - waterless mixture of oil products containing waterless oil, of powder-like water-soluble polymer and connector in amount of 0.05-0.2% for mass of carrying liquid or 30-100% for mass of power-like water-soluble polymer, as said mixture a mixture of waterless oil and light oil products processed in relation 0.1:9.9-9.9:0.1 is used, and as connector - dry aluminum acetate, chrome acetate, iron acetate, magnesium acetate, copper acetate, barium acetate, manganese acetate, calcium acetate or their mixtures.
Method for blocking high-penetrable watered oil beds / 2244822
Method includes pumping, in carrying liquid - waterless mixture of oil products containing waterless oil, of powder-like water-soluble polymer and connector in amount of 0.05-0.2% for mass of carrying liquid or 30-100% for mass of power-like water-soluble polymer, as said mixture a mixture of waterless oil and light oil products processed in relation 0.1:9.9-9.9:0.1 is used, and as connector - dry aluminum sulfate, chrome sulfate, iron sulfate, magnesium sulfate, copper sulfate or their mixtures, or their alums with common formula MIMIII(SO4).2
Method for isolating fluid-influx area in a well / 2245988
Method includes forming a screen of viscous-elastic mass in well via interaction of working liquid pumped into well in form of alkali waste of kaprolaktam production or its solution, with influx liquid. Necessary speed of transformation of viscous-elastic mass and intensiveness of filling of well adjacent area with it is adjusted by mode of pressing of working liquid into influx zone. For this purpose pressure increase is alternated with pressure decrease. Pressure is decreased for 10-50% from achieved maximum pressure. Relation of exposure time for increased pressure to decreased pressure time is taken in limits 1.1-5.0.
Compound for water isolation of low-temperature beds / 2250367
Compound has carbomide, urotropine and water, additionally has chlorine iron with following relation of components in percents of mass: carbomide 6.0-16, urotropine 5.0-8.0, chlorine iron 5.0-10, water the rest.
 Method for preparing and pumping into well multi-component technological systems and plant for realization of said method / 2250368
Method includes adjustment of pumping and dosing equipment on basis of amounts of components and their feeding time. Multi-component technological system is forced into well. Adjustment of pumping and dosing equipment is performed by means of frequency converters. Frequencies, set at frequency converter of forcing pump electric engine, at frequency converter of linker-feeding pump electric engine and at frequency converter of powdered polyacrylamide dosing pump electric engine are determined from mathematical formulae. Plant has drift dosage means for powdered polyacrylamide, drift dosage means for powdered components, two ejector mixers, mixing tank, forcing pump, linker tank. Electric engines of forcing pump, linker pump, first and second drift dosage devices are provided with frequency converters. First and second ejector mixers are provided with replaceable nozzles, with diameter 4.5-8.0 mm to provide for 150-250 m3/day plant productiveness.
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FIELD: oil industry. SUBSTANCE: compound has carbomide, urotropine and water, additionally has chlorine iron with following relation of components in percents of mass: carbomide 6.0-16, urotropine 5.0-8.0, chlorine iron 5.0-10, water the rest. EFFECT: higher efficiency. 8 ex, 2 tbl
The invention relates to the oil industry and can be used for enhanced oil recovery of low-temperature layers in the processing of flooded wells flooding. Known composition for enhanced oil recovery - an aqueous solution containing aluminum salts, urea, forming a bulky gel directly into the reservoir, and the temperature at the bottom hole should be at least 70° (RF patent No. 2061856). The disadvantage of this method is that it can only be used for reservoirs with temperatures above 60-70°C. Known composition for enhanced oil recovery and isolation of water to wells by increasing the resistance formed in the layer of gel (RF patent No. 2076202 from 18.10.94, CL E 21 In 43/22, 33/138). The composition contains aluminum salts, urea, polyacrylamide and water in the following ratio, wt.%: polyacrylamide 0,5-2,5; aluminium chloride 0,4-17,0; urea 1,5-30,0; water - the rest. The disadvantage of this composition is the use at high temperatures 90°C. Closest to the claimed is a composition containing urea, aluminium salts, water and urotropine (RF patent No. 2066743 from 08.02.93, CL E 21 In 43/22). The composition contains the following components, wt.%: urea 4-16, aluminum chloride or nitric acid (in recalculation on anhydrous) 2-4, methenamine 2-8 and water - the rest. Methenamine (hexamethylene the Ramin) promotes the formation of a gel at low temperatures. However, the strength properties of the gels of the composition deteriorate over time, is the aging of the gels emitting fluid that determines the need for frequent re-treatments. The aim of the invention is to improve the strength and adhezionih properties of the proposed structure by reducing fluid in the aging process of the gel. The authors propose a composition for water insulation low temperature formations containing urea, methenamine and water, which further comprises ferric chloride in the following ratio, wt.%: Urea 6,0-16 Methenamine 5,0-8,0 Ferric chloride 5,0-10 Water - the rest Ferric chloride (TU 6-00-05763458-129-91) is a pasty mass of brownish-orange color. The essential difference is the use of ferric chloride in combination with urotropine, the use of which allows to form strong gels in the low-temperature reservoir without fluid in the aging process. Over time is not the destruction of the gel. One of the main characteristics of gel-forming compositions for enhanced oil recovery is to preserve the strength of the gels over time. Experimental verification of the ability to form strong gels was performed by incubation of compounds, you need a kitchen is by using ferric chloride, urea, methenamine at low temperature for 30 days. For comparison thermostatically compositions proposed in the patent of Russian Federation №2066743 from 08.02.93, CL E 21 In 43/22 - aqueous solutions on the basis of ferric chloride, urea and hexamine. Each composition was prepared in a quantity of 50 ml of the gel Formation occurred after 8-10 hours. Then the compositions were thermostatically at a temperature of 20°C. After 3, 10, 20, 30 days were measured singled fluid in the process of aging gels. Example 1 (the prototype, the composition according to the patent of the Russian Federation 2066743 from 08.02.93, CL E 21 In 43/22). Prepared aqueous composition of 50 ml, containing 14 wt.% urea, 8 wt.% urotropine, 3 wt.% aluminum chloride, the rest is water. The composition is well stirred. 8 hours later formed a gel. Gel thermostatically at 20°C. the Amount of discharged liquid in the aging process are presented in the table. Examples 2-3, analogous to example No. 1, are structures on the basis of urea, methenamine, aluminum chloride. Example No. 4-8 - compositions using ferric chloride, urea, methenamine. The compositions were also prepared in a quantity of 50 ml each. The gelation time of 8-10 hours. Temperature control was carried out at 20°C. the table presents the results of the temperature control composition No. 1-8 at 20°C. To assess the effectiveness of the waterproofing properties of the proposed structure (nutropin - 8%, urea - 16%, ferric chloride - 10%) were filtrazione experiments. The study was conducted on a natural sample of quartz Sandstone, absolute permeability which amounted ToVOD=603 MD. First measured the permeability of the core, water-saturated (KVOD=45,6 MD), this was followed by filtration of the gel-forming composition. Then the core was placed for 24 hours in water and then conducted a second filtering water. Permeability amounted ToVOD=5,4 MD. The permeability of water after the injection of a gel-forming composition decreased 8.5 times. Thus, the proposed structure can be used at low formation temperatures for more efficient isolation of water by improving the strength properties of the composition.
Composition for water insulation low temperature formations containing urea, methenamine, and water, wherein the composition further comprises ferric chloride in the following ratio, wt %: p num="28"> Urea 6,0-16Methenamine 5,0-8,0 Ferric chloride 5,0-10 Water the Rest
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