Composition for confinement of water inflow into well |
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IPC classes for russian patent Composition for confinement of water inflow into well (RU 2244819):
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
 The way to isolate the flow of formation waters in horizontal oil or gas well / 2235873
The invention relates to the oil and gas industry, in particular to isolate the flow of formation waters in horizontal wells
 Way to isolate the ingress of water during drilling and device for its implementation / 2235190
The invention relates to the construction of wells, in particular to a method of isolation ingress of water during drilling
 The way to isolate the flow of formation water into the well / 2232265
The invention relates to the oil and gas industry, in particular to the field of operation and maintenance of wells and isolate the flow of formation waters in the horizontal sub-horizontal and vertical wells with open or cased face, and with the shank filter on the bottom
 The way to restore productivity and commissioning of idle oil and gas wells / 2231630
The invention relates to the oil and gas industry, namely, to restore the idle oil and gas wells with low reservoir properties and closely spaced oil-water or gas-contacts
 Biomaterial reagent for the eor and the limitation of the water in oil wells and the method of processing oil reservoir / 2230900
The invention relates to the oil industry, in particular reagents for enhanced recovery, and how the development of oil fields with their application
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 and gas production. SUBSTANCE: 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. EFFECT: increased insulation capacity of grouting compositions. 1 tbl
The invention relates to the oil and gas industry, in particular compositions for the repair and insulation works in producing wells, and plugging flushed zones in the injection wells. Known composition for the isolation of brine in the borehole containing a silicate of an alkali metal silicofluoride and sodium [1]. The disadvantages of this mixture are short term curing plugging mixture (not enough to penetrate into the zone violations) and syneresis plugging mass, followed by its shrinkage. The last of these shortcomings contributes to casing exits and, consequently, reduces the quality of supports and reliable operation of the wells after the repair and insulation works. The aim of the invention is the improvement of water properties, elimination of shrinkage and the increase in the maturity band of curing cement compositions. The solution of this problem is achieved by the fact that the composition for insulation of water in wells contains an aqueous solution of sodium silicate and sodium silicofluoride, as an aqueous solution of sodium silicate composition contains the specified solution with a density of 1.36 g/cm3, silicate module 3 and additionally triacetin-acetic acid triglyceride and wood flour at the following content, wt.%: Wagnerstr of sodium silicate with a density of 1.36 g/cm 3and silicate module M=3,0 90,0-95,0 Silicofluoride sodium 3,0-8,0 Wood flour 1,0-4,0 Triacetin 1,0-4,0 The features of the invention Common to the known and proposed compositions for isolation is that they include an aqueous solution of sodium silicate and sodium silicofluoride. Salient features of the invention are: 1. An aqueous solution of sodium silicate has a density of 1.36 g/cm3and silicate module M=3,0. 2. To reduce the amount of sodium silicofluoride and as a regulator of the timing of the curing composition contains triacetin. 3. As the filler composition contains wood flour. Studies on the patent and scientific literature showed that this set of features is new and not previously used, and this in turn allows to make a conclusion about the technical solutions according to the criterion of “novelty”. Characteristics of reagents used are as follows. An aqueous solution of sodium silicate is a thick liquid yellow or gray according to GOST 13078-81. Silicofluoride sodium technical - fine crystalline powder of white color, satisfying the requirements of THE 113-08-587-86. Triacetin technical - transparent colorless or shade from light yellow to light brown C the ETA liquid on THE 7511903-571-99. Wood flour is a product of the dry mechanical chopping wood GOST 16361-87. Preparation of composition in field conditions is as follows. In the hopper of the unit preparing the pulp from 0,08 t silicofluoride sodium 0,04 t of triacetin and 0.04 tons of wood flour. To the resulting slurry from tank trucks poured 1.35 m3an aqueous solution of sodium silicate with a density of 1.36 g/cm3and silicate module M=3, mixed well and injected into the well. Push plugging mixture estimates of the total amount of produced water. Developed cement compositions were tested in a tubular reservoir models at 20°C. the Permeability of reservoir models, plugged compounds with an optimal ratio of ingredients, zero. The proposed injection of the composition into the reservoir leads to the formation of gel-like or solid screen, which leads to almost zero permeability. Time gel curing or stone governed by the amount of sodium silicofluoride and triacetin. Ratio of components, the technological parameters of the composition for insulation and prototype shown in the table. The data obtained indicate that with the minimum content of sodium silicofluoride plugging mass is not formed, when the maximum content of sodium silicofluoride, Tampa the most important stone is formed in a short time, which is not enough to produce composition into the reservoir. The introduction of triacetin allows you to reduce the amount of sodium silicofluoride, and adjust the timing of the curing cement composition, and wood flour prevents syneresis and eliminates shrinkage. The use of the composition for insulation provides compared to the prototype improvement of water properties by eliminating shrinkage and increase range of curing time. Bibliography 1. USSR author's certificate 834343, CL E 21 In 43/32, 1981. The prototype.
Composition for insulation of water in wells containing an aqueous solution of sodium silicate and sodium silicofluoride, characterized in that it contains as an aqueous solution of sodium silicate above solution with a density of 1.36 g/cm3and silicate module M=3.0 and additionally triglyceride acetic acid, triacetin and wood flour in the following ratio, wt.%:
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