Method for isolating influx of foot water and fixing of well-adjacent gas wells bed zone of deposits with abnormally low bed pressure. RU patent 2245438.
 Method for blocking high-penetrable watered oil beds / 2244822Method 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 / 2244821Method 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 / 2244820Method 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. |
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Grouting composition / 2244804 Invention provides grouting composition intended for selective insulation of water inflows into wells, including those occurring under low-temperature and high-permeation oil reservoirs, as well as for suppressing lost-circulating zones and brine inflow zones. Composition including product of hydrolytic etherification of chlorine-containing phenyltrichlorosilane still residues with aqueous alcohol solution contains, more specifically, product obtained by hydrolytic etherification of 100 wt parts of indicated residues with 10-32,8 wt parts of 90-93% aqueous alcohol solution in presence of 10-40 wt parts of orthosilicic acid ethyl ester and, additionally, 15-35 wt parts of chlorine-containing phenyltrichlorosilane still residues at summary content of the two components 133.2-161.6 wt parts. Grouting composition may further contain up to 16.8 wt parts of polar solvent. |
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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. |
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Light-weight grouting mortar / 2244098 Invention relates to grouting mortars used for cementing casing pipes of gas, gas-condensate, and oil wells complicated by presence of formations with low hydraulic rupture pressure as well as presence of permafrost rocks. Light-weight grouting mortar contains 47.0-60.0% special-type cement, 6.6-11.8% clinoptilite as light-weight additive, and water. As a result, casing-pipe annulus incidents during boring and running wells are avoided owing to improved parameters of grouting cement, in particular increased sedimentation stability of mortar, dimensional stability and needed strength of cement stone at low positive and negative temperature in early hardening stages are achieved at simultaneous lowering of grouting mortar density. |
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Light-weight grouting mortar / 2244098 Invention relates to grouting mortars used for cementing casing pipes of gas, gas-condensate, and oil wells complicated by presence of formations with low hydraulic rupture pressure as well as presence of permafrost rocks. Light-weight grouting mortar contains 47.0-60.0% special-type cement, 6.6-11.8% clinoptilite as light-weight additive, and water. As a result, casing-pipe annulus incidents during boring and running wells are avoided owing to improved parameters of grouting cement, in particular increased sedimentation stability of mortar, dimensional stability and needed strength of cement stone at low positive and negative temperature in early hardening stages are achieved at simultaneous lowering of grouting mortar density. |
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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. |
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Grouting composition / 2244804 Invention provides grouting composition intended for selective insulation of water inflows into wells, including those occurring under low-temperature and high-permeation oil reservoirs, as well as for suppressing lost-circulating zones and brine inflow zones. Composition including product of hydrolytic etherification of chlorine-containing phenyltrichlorosilane still residues with aqueous alcohol solution contains, more specifically, product obtained by hydrolytic etherification of 100 wt parts of indicated residues with 10-32,8 wt parts of 90-93% aqueous alcohol solution in presence of 10-40 wt parts of orthosilicic acid ethyl ester and, additionally, 15-35 wt parts of chlorine-containing phenyltrichlorosilane still residues at summary content of the two components 133.2-161.6 wt parts. Grouting composition may further contain up to 16.8 wt parts of polar solvent. |
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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. |
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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. |
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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 influx of foot water and fixing of well-adjacent gas wells bed zone of deposits with abnormally low bed pressure / 2245438Method includes feeding water-isolating compound along tubing pipes, containing polyvinyl spirits and consisting of components forming an impenetrable zone in case of mixing in the bed, pressing it into bed, washing and exposure of well for forming of impenetrable zone, tubing column is lowered for 2-3 meters below perforation range, and into isolation range along tubing pipes hydro-repelling liquid is first pumped, in volume, exceeding volume of water-isolating composition in at least two times, water-isolating composition includes special liquid except from polyvinyl spirits, its pumping is performed in sequence - first goes polyvinyl spirits, then buffer liquid, special liquid, buffer liquid, repeating these operations until reaching required height of isolation interval and fixing of well-adjacent area, after that said pressing, washing of well and said polymerization exposure are performed. |
 Plugging mix / 2245989Plugging mix intended for cementation of oil, gas, and gas condensate wells under moderate and elevated temperatures contains 50-76% Portland cement, 20-40% finely ground quartz, and caustic magnesite powder. |
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Plugging composition / 2245990 Portland cement-based composition contains, wt %: polymer 1-10, hardening accelerator 6-8. plasticizer 0.3-0.5, alumina cement 7-10, gypsum dihydrate and/or anhydrite 5-8, said polymer being selected from the group comprising: polyacrylamide, hydrolyzed polyacrylonitrile, polyvinyl alcohol, organosilicon liquid, latex and cationic bitumen emulsion, and said hardening accelerator being alkali or alkali-earth metal sulfates or chlorides. |
 Composition for improving of reservoir recovery / 2246605Claimed composition contains (mass parts): resin 100; liquid curing agent (e.g., alkali solutions) 15.1-60; ammonium carbonate 0.1-9.9. Composition of present invention afford the ability to limit the water and sand inflow, to increase strength and permeability of formed reservoir. |
FIELD: oil and gas extractive industry.
SUBSTANCE: method includes feeding water-isolating compound along tubing pipes, containing polyvinyl spirits and consisting of components forming an impenetrable zone in case of mixing in the bed, pressing it into bed, washing and exposure of well for forming of impenetrable zone, tubing column is lowered for 2-3 meters below perforation range, and into isolation range along tubing pipes hydro-repelling liquid is first pumped, in volume, exceeding volume of water-isolating composition in at least two times, water-isolating composition includes special liquid except from polyvinyl spirits, its pumping is performed in sequence - first goes polyvinyl spirits, then buffer liquid, special liquid, buffer liquid, repeating these operations until reaching required height of isolation interval and fixing of well-adjacent area, after that said pressing, washing of well and said polymerization exposure are performed.
EFFECT: higher efficiency.
1 dwg, 1 ex
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 gas wells, which are characterized by significant fluid absorption damping due to low reservoir pressure availability of washed out areas and cavities in the near-wellbore area of the formation (PPP). A known method of injection two-component compositions after mixing of the components [Lee, A.V. Grigoriev Apelco. Insulation works the completion and operation of oil wells. M., Nedra, 1998, str]. The disadvantage of this method is the complexity of its use for the isolation of an extended absorbing gas recovery intervals. The closest technical solution chosen for the prototype is isolation technology inflow of formation water in the well using a composition consisting of two components [Euiro, Sgiliau, Moskalyov, URALSIB. The way to isolate the flow of formation waters in the borehole, AC SU # 1328488, publ. 07.08.87, bull. No. 29]. The disadvantage of this method is its unsuitability for isolation of highly absorbing gas recovery and long perforated intervals. The task of the invention is to develop an efficient method for the isolation of the inflow of formation water in gas wells with significant fluid absorption damping due to low reservoir pressure, the presence of washed out areas and cavities in the PPP. The technical result of the invention is to improve the efficiency of isolation of bottom water, as well as fixing the PPP gas wells. The task and the technical result is achieved by the fact that in the method of isolation of the inflow of bottom water and fastening the PPP gas of wells with abnormally low formation pressure, including injection water composition consisting of two components that form when mixed in the layer of impervious area, in contrast to the known, tubing down 2-3 meters below the perforated interval in the interval isolation pumped through the tubing gidrofobiziruyuschey fluid in the volume in two or more times the volume of water composition, the tubing sequentially fetch the first component of water composition, the buffer fluid the second component of water composition, the buffer fluid, and repeating these operations until reaching the desired height interval isolation and fixing the walls of the well, after which push water composition in the reservoir, the wells are washed and left for the polymerization of water composition. Alternating injection components water composition, for example, on the basis of polyvinyl alcohol (PVA) and hydrophobic organosilicon liquid (NGL) leads to the formation of considerable height fixed area in the perforated interval due to the fact that by mixing PVA and NGL almost instantly formed a gel-like mass, further displacement in the reservoir requires increased repression. The liquid level in the turns, rises and the remaining volume of NGL and PVA go into the reservoir above the already established areas. Alternating several times, thus, the injection of PVA and NGL, can be consolidated and extended in the height interval of wellbore zone, characterized by significant acquisitions. The height interval isolation can be defined by the rise of liquid level killing in the turns. An example implementation of the method The drawing shows a diagram of the pumping and placement of the components of water composition in the PPP gas wells. Flooded gas well at a depth of 1100 m and perforation interval of 40 m, with significant fluid absorption killing, muffled by secretorum. Circulation is not due to absorption. In the lower part of the PPP is washed area with a cavity 1. The fluid level in the well is 400 meters In the well was lowered through the tubing 2 to two meters below the perforated interval. When open annular valve into the well on tubing pumped 20 m 3 condensate 3. When the condensate tubing closed annular valve. In the well consistently on the first speed of the machine has pumped: a ten percent aqueous solution of PVA 4 in volume 4 m 3 , 0.2 m 3 condensate, 6 m 3 NGL 5, 0.2 m 3 condensate, 3 m 3 PVA 6, 0.2 m 3 condensate, and squeezing the liquid 7. Washed well in polutorakratnomu volume (appeared circulation) and the well was left for 24 hours for polymerization of water composition. The way to isolate the flow of bottom water and fastening borehole zone gas wells oil fields with abnormally low formation pressure, including injection in the tubing - tubing water isolating a composition containing polyvinyl alcohol and consisting of the components that form when mixed in the layer of impervious area, its displacement in the reservoir, flushing and abandonment of wells for the formation of an impermeable zone, characterized in that the tubing is lowered to 2-3 m below the perforated interval, the interval of the insulation tubing pre-fetch gidrofobiziruyuschey fluid volume at least twice the volume of water composition water composition addition of polyvinyl alcohol contains NGL, the injection is carried out in sequence, the first polyvinyl alcohol, then the buffer liquid, NGL, the buffer liquid, and repeating these operations until reaching the desired height interval isolation and fastening borehole zone, followed by the specified displacement, rinse well and indicated the abandonment of the polymerization of the above-mentioned insulating composition.