Method of well water production zone isolation. RU patent 2504640.
 Fluid media for pre-treatment of formation, which contain peroxides, and methods referring to them / 2501942Method involves production of cleaning fluid medium containing peroxide-forming compound and fluid medium on water basis; arrangement of cleaning fluid medium in an underground formation; removal of contaminants at least from some part of the underground formation for formation of a cleaned section of the formation; production of a consolidating agent; arrangement of the consolidating agent at least on some part of the cleaned formation section; and provision of conditions for sticking of the consolidating agent at least to some amount of non-consolidated particles in the cleaned formation section. As per the other version, the method involves the above, where the cleaned section includes at least some amount of cleaned flow movement routes. |
 Composition for isolation of behind-casing flows and bed high-permeability zones / 2499020Proposed composition comprises 100 wt % of silicic acid ethyl or methyl ether or mixes thereof, 15-50 wt % of polar solvent, 1-3 wt % of chlorides of IV-VIII group metals, and additive representing polypropylene in amount of 0.1-0.5 wt %. |
| Method for waterproofing work in fractured manifolds / 2496970 In method for waterproofing work in fractured manifolds, which involves subsequent pumping to an isolated formation of portions of plugging materials at the pressure that is lower than formation hydraulic fracturing pressure, further abandonment of the well for the time of curing of the plugging material pumped in the last turn, that as the first portion of reinforcing plugging material in water solution of polyacrylamide with weight fraction of polyacrylamide of 0.2-0.6%, proppant with fraction of 20-40 mesh with a coating from organic-silicon compound with concentration of 50-200 kg/m3, is pumped, which has physical and chemical similarity to curing plugging material; then, fresh water is pumped in the volume equal to 1.5-2 volumes of water solutions of polyacrylamide, and as the second portion of curing plugging material there pumped is organic-silicon plugging composition. |
| Sealing mud and method of sealing influx of reservoir fluid or gas / 2495902 Group of inventions relates to methods of sealing influx of reservoir fluid (water) or gas in wells. The sealing mud contains the following, wt %: sodium silicate - 5-50; bentonite - 15-55; polyacrylamide - 0.0005-0.5; water - the balance. Packer equipment for sealing the sealed interval is fitted and injectivity is determined. Spacer fluid, sealing mud of said composition, spacer fluid and a calcium ion-containing solution are successively pumped and held for the structure formation period, followed by depressurisation, removal of the packer equipment and fitting a cement bridge. |
| Procedure for water shutoff treatment in well / 2495229 Procedure for water shutoff treatment in well includes pumping suspension of water-swellable polymer into shut-off formation. suspension of water-swellable polymer is pumped in three cycles; during the first cycle water-sellable polymer V 50 E is pumped with water of calcium-chloride type with salinity of 120 g/l; during the second cycle water-swellable polymer V 105 is pumped with water of chloride-calcium type with salinity of 60 g/l; during the third cycle water-swellable polymer V 210 is pumped with fresh water. |
 Viscoelastic surface-active spacer fluids / 2495073Invention relates to spacer liquids which are used in cementing operations in oil and gas wells. The spacer fluid for use in cementing oil wells contains aqueous solution of calcium chloride and/or calcium bromide; an amphoteric viscoelastic surfactant and an amphiphilic polymer, wherein the amphoteric surfactant has betaine structure where R is a hydrocarbon group which can be branched or straight, aromatic, aliphatic or olefinic and contains 14-26 carbon atoms and, optionally, contains an amine; n=2-4; and p=1-5; and mixtures thereof. The well treatment method during a cementing operation involves pumping said spacer fluid before cementing with a well cementing solution. The invention is developed in subclaims. |
| Isolation method of water influx zones in well / 2494229 Isolation method of water influx zones in a well consists in pumping to an isolated formation of water solution of calcium chloride with density of not less than 1500 kg/m3, which is warmed up to the temperature of 70-90°C. After pumping of water solution of calcium chloride exposure is performed during 8-12 h. Then, a bank of hydrocarbon liquid and liquid sodium glass heated to the temperature of 70-90°C is pumped in series and exposure is performed during 24-48 h for formation of gel in the whole volume of liquid sodium glass. |
| Preparation method of composition for isolation of lost-circulation zones in well / 2494228 Preparation method of a compound for isolation of lost-circulation zones in a well by mixing cement, clay powder, polyacrylamide, water and an additive. First, water solution of the additive is prepared by introducing the latter to water; then, at mixing clay powder and cement is added in series to the above water; mixture is mixed during at least 30 minutes and then, powder-like polyacrylamide is added; sodium metasilicate is used as an additive, and clay powder providing the yield of clay mortar with viscosity of 20 mPa·s of less than 5.0 m3/t is used as clay powder at the following component ratio, wt %: the above clay powder - 60-80, cement - 15-20, the above additive - 10-20, powder-like polyacrylamide - 0.005-0.01, and water - 100. |
| Sealant for well isolation work / 2493189 Sealant for well isolation work consists of a synthetic resin and a hardener. The sealant additionally contains the corrosion inhibitor INCORGAZ-21T; the synthetic resin is an epoxy composition XT-116 component A, and the hardener is a cold-setting hardener XT-116 component B in the following proportions, vl %: The epoxy composition XT-116 component A - 70-74; the cold-setting hardener XT-116 component B - 10-14; the corrosion inhibitor INCORGAZ-21T - the rest with the proportions (weight parts) of the cold-setting hardener XT-116 component B and the epoxy composition XT-116 component A making 1:6.5-8.6 respectively. |
 Method to produce isolating gel-forming water-based solution / 2491411Method to produce an isolating gel-forming water-based solution containing an aqueous solution of liquid glass with a silicious module includes titrating with hydrochloric acid. The solution is reinforced with alkaline-soluble vegetable galactoglucomannan. Using hydrochloric acid, the produced solution is titrated, the value pH of which is set within 8.5-11.4, necessary for transition of galactoglucomannan into undissolved state. Components of the isolating gel-forming solution are used at the following composition, wt %: galactoglucomannan 0.1-0.5, liquid glass 5-8, balance - water. |
| 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. |
| 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. |
| 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. |
 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. |
 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 / 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).212H2O, where MI-Na,K,Pb,Cs,NH4, and MIII-Al,Cr,Fe,Mn. |
 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. |
| 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 industry.
SUBSTANCE: proposed method comprises making the mortar to be injected to well and forced into interval to be isolated. After injection of mortar into well in amount of 10% of total amount, portion of fibro fibers is added thereto under mortar jet. First portion of fibro fibers is fed in 3 mm length, minimum, and in minimum amount of 1 kg per 1 m of mortar. At insignificant increase in injection pressure, 2nd, 3rd and 4th portions of fibro fibers (6, 12, 18 mm-long) are added in portions of 2-5 kg per 1m of mortar till pressure of 70-90% of permissible pressure to operating string or to pools. Injection is terminated to force mortar with fibro fibers, process fluid to permissible pressure to string or to pools. Solution residues are washed off by back-flushing. Well is closed for mortar hardening period.
EFFECT: higher efficiency of isolation, fast process.
Offer applies to the oil and gas industry and is designed for repair and isolation works in wells.
There is a method of isolation, carried out using injection composition to block aquifers, which contains water-soluble polymer number of acrylic, silicate of sodium, the regulator gelling, water and additive, which use wood chips, modified suspension of water-soluble viscous fluid (Pat. RU №2120547, IPC 21 33/138, publ. 20.10.1998, bul. №29). The composition of pumped into the well for isolation of aquifers using effect.
The disadvantage of this method is that it has low mechanical strength, insufficient, for example, for fixing poorly cemented and crumbling rocks, and in case of creation in the well alternating depression composition washed out due to the fast-break water into the well along the isolation of the screen.
The closest to the technical nature of the proposed method is a method of water influx isolation cement mortar (A.D. Amirov, S. , I.B. Sarkisov. Overhaul repair of oil and gas wells, Baku, , 1953, .230). According to the method of injection of cement is produced through tubing (NKT) with subsequent squeeze of reagent slug into the formation process liquid. If in the process of pumping of cement pressure does not rise, then the entire cement mortar is forced into the reservoir, leaving in the tubing, without waiting for the expiry of the hardening of cement, produced a second operation cementing. After the end of the period of hardening cement remaining in the tube , experiencing the production casing tightness and in case of a negative result is produced operational column, using resins or other materials.
The disadvantage of this method is that a single injection is not always possible to isolate water production and effect of the application of the method is often best achieved only after repeated downloads of cement mortar.
The technical purpose of the proposal is to increase the effectiveness of insulation zones water production wells at the expense of increasing the strength of the water isolation composition containing reinforcing additives, while saving water isolation composition and reduction of time for carrying out of works.
The task is solved by a method to isolate areas of water inflow in the well, including the preparation of cement mortar of cement and fresh water when respect to The W/C - 0.5-density within 1800-1850 kg/m 3 , a continuous supply of cement from machines in Chanak road cementing unit CA-320M, consistent pumping into the hole and in isolated by interval.
What is new is that after injection into a well cement in the amount of 10% of total volume in Chanak road cementing unit under a stream of cement additionally add portions of the glass-reinforced plastic rods, the first portion of glass-reinforced plastic rods minimum length is 3 mm and a minimum of 1 kg on 1 m 3 of the cement mortar, with a slight increase in pressure pumping added the second, third and fourth portions of the glass-reinforced plastic rods with widths 6, 12, 18 mm with a number of glass-reinforced plastic rods in increments of 2 to 5 kg per 1 m 3 of cement mortar before reaching the pressure corresponding to the 70-90% of the allowable pressure on the production casing or reservoirs, injection stop, cut through the grout with a process liquid with the density of the corresponding density of the liquid well killing, to obtain the maximum permissible pressure on the production casing or strata, after which the remains of cement mortar with wash back-flushing with counter-pressure, equal to 40-60% of the permissible pressure at , then, without reducing pressure hole cover and leave on a waiting time of hardening of cement RFQ.
Used in the proposed sentence reagents for preparation of cement mortar and grout with :
- cement GOST 1581-96. Portland cement ( II-50);
- this type of length 3, 6, 12, 18 mm on that 2272-006-13429727-2007. Fiber construction . This type represents a fiber made of thermoplastic polymers.
It is known that the cement stones, received during the curing of the cement mortar, high durability on compression, have relatively low tensile and Flexural strength, as well as some of permeability to gases and liquids. To correct these deficiencies use a lot of different ways, one of which is the reinforcement of cement stone various fibrous materials, both organic and inorganic origin.
Widespread glass, steel, cellulose, synthetic and other fibers. They all have different physical and mechanical properties: resistance to them aggressive environments and temperatures, ecological safety and other Fiber can be made of thermoplastic polymers (polyethylene terephthalate, polybutylene terephthalate, polypropylene, polyethylene, polyamide or other high-molecular polymers) in various combinations core/shell. This type is intended for use in concrete and solutions on the cement, plaster, binding, the production of concrete and reinforced concrete structures of civil, industrial, road, construction to improve the complex of physical-mechanical properties of a cement stone (durability, water resistance, frost resistance and corrosion resistance of concrete and mortar).
This type is added in small amounts to the cement, has a positive influence on physical-mechanical parameters of cement mortars.
The essence of the proposed technical solution consists in the following. Prepare the mortar mixing cement of mark II-50 and freshwater density of 1000 kg/m 3 at respect of 0.5 (W/C=0,5) with a density of cement within 1800-1850 kg/m 3 . Cement mortar of vehicles continuously served in Chanak road unit of CA-320 M, where with the help of a pump unit of CA-320 M pumped into the well. After the injection of a cement solution in an amount of 10% of its total volume, without interrupting the injection, in Chanak road under a stream of cement continuously and uniformly add portions of the glass-reinforced plastic rods. Add the first portion of glass-reinforced plastic rods, starting with a minimum length of 3 mm, with a minimum of 1 kg on 1 m 3 of cement mortar. This size of the glass-reinforced plastic rods allows cement mortar with penetrate the small pores in the reservoir flooded and isolates them. The volume of injected cement mortar with the first and each subsequent portion of glass-reinforced plastic rods 10-50% of the total volume of cement mortar. If the pressure in injection will not be increased or increased slightly, injecting continue to add in a cement mortal second portion of glass-reinforced plastic rods of length 6 mm, number 2 to 5 kg per 1 m 3 of cement mortar. Such a solution does not penetrate the small pores, but cements medium and large pores of the reservoir, etc. If the pressure in injection will not be increased or increased significantly, the download continues until the pressure corresponding to the 70-90% of the allowable pressure on the production casing or strata. The third portion of delivering this type 12 mm in length, fourth portion - 18 mm, and the number of glass-reinforced plastic rods in portions choose 2-5 kg per 1 m3 of cement (the number of glass-reinforced plastic rods in portions of selected depending on the injectivity of the insulated interval and pumping pressure). Thus, increase the length and number of glass-reinforced plastic rods in portions.
By consecutive pumping of cement mortar with (increasing the length of glass-reinforced plastic rods and its number on each portion) should result in an increase of pumping pressure. The pumping of cement mortar with continue until the pressure corresponding to the 70-90% of the allowable pressure on the production casing or strata. If this pressure is reached when you add the first or subsequent portions of the glass-reinforced plastic rods, the injection of cement mortar with cease. If the pressure remains unchanged, the injection of cement mortar with portions of the glass-reinforced plastic rods continue until the pressure corresponding to the 70-90% of the allowable pressure on the production casing or strata.
The total volume of cement mortar and grout with required for injection into the hole while limiting water production depends on the density of water injection wells. It is set during test-field works in the wells and it is chosen according to the table:
Table- The total volume of cement mortar and grout with
Specific acceleration of the insulated interval, m3 /(h·MPa), within
The desired solution volume, m 3 , within*
from 1.5 to 2.5
from 3 to 5
from 2,5 to 3,5
from 5 to 7
more than 3.5
from 10 to 15
* The volume of cement mortar is 10% of the total volume of cement mortar and grout with
Cement stone received after curing of the cement mortar with , impermeable to fluids and is corrosion-resistant, provides a good grip with the breed and the production casing well. Cement stone also has a high resistance to tension and high fracture toughness, because glass-reinforced plastic rods provide effective resistance to disclosure cracks not only due to coupling (resistance in the axial for glass-reinforced plastic rods direction), but thanks to resistance in the transverse direction. In contrast to the method, taken as a prototype, the isolation zones of water inflow is achieved once - there is no need reinjection, as well as insulated interval well using resin, then waiting solidification resin followed by resin bridge and so on, because this is achieved by saving insulating composition and, therefore, reduce the time of the works.
Example 1. Diameter of casing - 168 mm, perforation interval - 820,0-837,0 m Well is filled process liquid density of 1800 kg/m 3 . Interval violations 140,0-143,0 M. the Depth of the cutting bridge - 153,0 m Pickup violations - 180 m3 /h at a pressure of P=2,0 MPa, specific pickup - 3.75 m 3 /(h·MPa). The maximum allowable pressure on the production casing - 10.0 MPa. In the well were launched in the tubing string pen and installed it on depth 120,0 m (see table), when the specific pickup 3.5 m 3 /(h·MPa), the total volume of cement mortar and grout with is 7,0 m 3 . Density of cement grout - 1850 kg/m 3 . Cement mortar of vehicles continuously served Chanak road CA-320 M, where with the help of the pump CA-320 M, pumped into the well 0.7 m at a pressure of 20 bar. Without interrupting the injection, in Chanak road under a stream of cement evenly added the first portion of glass-reinforced plastic rods starting with a minimum length of 3 mm and in quantity of 1 kg 1.0 m cement mortar. Download the first portion in the amount of 3.0 m 3 , and cement mortar with enters the small pores formation and isolates them, as evidenced by increased pumping pressure from 2.0 to 3.5 MPa. As the pressure increased slightly, injecting continued, added in a cement mortal second portion of glass-reinforced plastic rods of length 6 mm, increasing the number of glass-reinforced plastic rods in portion to 2 kg 1.0 m 3 cement mortar. 've uploaded the second portion in the amount of 2.0 m 3 , when this pressure is continuously increased from 3.5 to 5.0 MPa, reflecting the gradual completion and cementing medium and large pore formation. Further, the injection of a continued and added to cement a third glass of glass-reinforced plastic rods 12 mm in length, increasing the number of glass-reinforced plastic rods in portions of up to 3 kg 1.0 m 3 cement mortar. For injection into isolated by layer the third portion in the amount of 1.3 m 3 was growing pressure to 7.0 MPa - 70% of the maximum allowable pressure on the production casing. Further, without interrupting the process, carried out of cement mortar with mode impregnation course of the insulated space of a layer to obtain the maximum permissible pressure on the production casing, equal to 10,0 MPa. When used the process fluid density 1,180 kg/m 3 , the corresponding density of the liquid well killing. After that, the remains of cement mortar with washed back-flushing with counter-pressure, equal to 5.0 MPa (50% of the permissible pressure at ) to not create the great depression on a layer in which the grout with a still is in a liquid state. Not reducing the pressure, the well was closed and left for 48 hours RFQ. After the expiration of the time RFQ by columns pressed tubing with a feather identified a glass of hardened cement mortar with , it. When testing for tightness under pressure to 10,0 MPa and the decline in production column showed a complete air-tightness. Then performed well completion and completed it at work.
Example 2. Diameter of casing - 146 mm, perforation interval - 890,0-897,0 m Well is filled process liquid density 1100 kg/m 3 . Interval violations 152,0-157,0 M. the Depth of the cutting bridge - 167,0 m Pickup violations - 120 m 3 /h at the pressure P=1.0 MPa, specific pickup - 5,0 m3 /(h·MPa). The maximum allowable pressure on the production casing - 11,0 MPa. In the well were launched in the tubing string pen and installed it on depth 130,0 m (see table), when the specific pickup 5,0 m3 /(h·MPa), the total volume of cement mortar and grout with is 12.0 m 3 . Density of cement grout - 1830 kg/m 3 . Cement mortar of vehicles continuously served Chanak road CA-320 M, where with the help of the pump CA-320M poured into the well in the amount of 1.2 m 3 at a pressure of 1.0 MPa. Without interrupting the injection, in Chanak road under a stream of cement evenly added the first portion of glass-reinforced plastic rods, starting with a minimum length of 3 mm and in quantity of 1 kg 1.0 m 3 cement mortar. Download the first portion in the amount of 4.0 m 3 , and cement mortar with enters the small pores formation and isolates them, as evidenced by increased pumping pressure from 1,0 to 2,0 MPa. As the pressure increased slightly, injecting continued, added in a cement mortal second portion of glass-reinforced plastic rods of length 6 mm, increasing the number of glass-reinforced plastic rods in portions of up to 3 kg 1.0 m cement mortar. 've uploaded the second portion in the amount of 3.0 m 3 , when this pressure is continuously increased from 2.0 to 3.5 MPa, reflecting the gradual completion and cementing medium and large pore formation. Next injection continued, added in a cement mortal third glass of glass-reinforced plastic rods 12 mm in length, increasing the number of glass-reinforced plastic rods in portion to 4 kg 1.0 m 3 cement mortar. Download third portion in the amount of 2.0 m 3 , the pressure is increased from 3.5 to 6.0 MPa. After this added in a cement mortal fourth portion of glass-reinforced plastic rods with a length of 18 mm, increasing the number of glass-reinforced plastic rods in portion to 5 kg 1.0 m 3 cement mortar. For injection into isolated by layer the fourth portion in the amount of 1.8 m 3 was growing pressure to 8.8 MPa 80% of the maximum allowable pressure on the production casing. Further, without interrupting the process, carried out of cement mortar with mode impregnation of porous space of the insulated layer to obtain the maximum permissible pressure on the production casing, equal to 11.0 MPa. When used the process fluid density 1100 kg/m 3 , the corresponding density of the liquid well killing. After that, the remains of cement mortar with washed back-flushing with counter-pressure, equal to 6.6 MPa (60% of the permissible pressure at ), in order not to create the great depression on a layer in which the grout with a still is in a liquid state. Not reducing the pressure, the well was closed and left for 48 hours RFQ. After the expiration of the time RFQ by columns pressed tubing with a feather identified a glass of hardened cement mortar with , it. When testing for tightness under pressure 11,0 MPa and the decline in production column showed a complete air-tightness. Then performed well completion and completed it at work.
Thanks to the use of the proposed method to isolate areas of water inflow in the borehole increases the effectiveness of the insulation zones water production wells at the expense of increasing the strength of the water isolation composition containing reinforcing additives, while saving water isolation composition and reduction of time for carrying out of works.