Method for hydro-isolation of watered productive bed |
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IPC classes for russian patent Method for hydro-isolation of watered productive bed (RU 2250990):
 Composition for adjustment of bed penetrability / 2250369
Composition has zeolite-containing reagent - liquid waste of zeolite production - solution from zeolite crystallization, containing zeolite, sodium oxide Na2O, silicon oxide SiO2, aluminum oxide Al2O3, sodium sulfate Na2SO4 and water with following ratio of components in percents of mass: zeolite 2.0-5.0, Na2O 3.0-4.0, SiO2 1.5-6.0, Al2O3 - 0.3-0.4, Na2SO4 - 1.5-4.5, 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.
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 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.
 Light cementing solution / 2250984
Solution has, in percents of mass: Portland cement 53,02, aluminum silicate hollow micro-spheres 9.35, as closing liquid - 4.6% solution of chlorine potassium-electrolyte - the rest.
Composition for maintenance and isolation operations in wells / 2250983
Composition has, in percents of mass: acetoneformaldehyde resin 5-90, hardening agent - 5% water solution of caustic soda 5-40, and bed water - the rest.
 Method for isolating bed waters influx in wells / 2249670
Method includes pumping silicon-containing substance with high-dispersion hydrophobic substance, as silicon-containing substance silicon-organic substance or mixture thereof is used, or silicon-organic substance with following ratio of components in percents of mass: silicon-containing substance 98.0-99.9, high-dispersion hydrophobic material 0.1-2.0. pumped mixture of silicon-containing substance with hydrophobic material is diluted with diluter, while silicon-containing substance having no chlorine is diluted, using as diluter 0.6-6.0 percents of mass of hydrochloric acid solution on mineralized water of chlorine-calcium type; and silicon-containing substance having chlorine is diluted using mineralized chlorine-calcium type water without addition of acid while 1 portion of silicon-containing substance with hydrophobic material is used in conjunction with 0.5-2 portions of diluter. When using mixture of silicon non-organic substance with hydrophobic material, argillaceous suspension is pumped with density 1.1-1.2 g/sm3 as filler and gel-forming controller. As oil-displacing component surfactant is pumped in amount 0.5-5.0 percents of mass, and as surfactant several special substances can be used. After pumping silicon-containing substance together with hydrophobic material separator is pumped - hydrocarbon solvent, for example, stable benzine, or hexane fraction, or diesel fuel, and then diluter.
 Composition for repair-insulation operations in well / 2248441
Invention provides polymeric grouting composition containing, wt parts: urea-formaldehyde resin 100, organosilicon product as hydrolizable hardener 0.1-10.0, surfactant (ML-80) 0.2-3.0, and formation water 20.0-40.0.
 Non-solidifying grouting composition / 2248440
Invention provides non-solidifying grouting composition, which can be used for formation segregation in casing operations carried out under variable temperature conditions during construction, operation, and pullout of underground gas storage wells as well as for other insulation and blocking operations. Water-based composition contains 20.0-26.0% mud powder and 56.0-63.0% "lignokhros" serving as binding and retarding additive and composed of lignosulfonate (78.0%), bichromate (19.0%), and alkali (3.0%).
Method for isolation of water influx in horizontal shaft of product well / 2247825
Method includes lowering a pipe column, pumping of high-viscous hydrophobic liquid into range, after lowering of pipe column with open latch at inter-pipe space whole hollow of horizontal shaft is filled with high-viscous hydrophobic liquid, then when closing said latch, said pumping is performed with amount of liquid 2-10 m3 of high-viscous hydrophobic liquid for one length meter of water influx range, and after that with open said latch isolating compound is pumped into well and positioned oppositely to water influx range, said latch is closed and isolating compound is pressed into water influx range by said liquid, while density of isolating compound is equal to density of high-viscous hydrophobic liquid or is different for no more than 60 kg/m3, and viscosity of hydrophobic liquid is equal to from 750 mPa to 2500 mPa with displacement speed of 2-600 s-1. As isolating compound acid-soluble or easily drilled compound hardening in bed can be utilized.
 Concrete mixture and additive "lignopane b-5" for concrete mixture / 2247091
Claimed additive contains (mass parts): Lignopane with molecular weight of 10-50 kDa 78-82; silicone waterproofing agent (antifoaming additive 139-282) 0.4-0.5; and additionally sodium carbonate 3-5; sodium sulfate 3-5; nitriletrimethyl phosphonic acid 5-10; superplasticizer 0-10. Additive content is 0.15-0.8 % calculated as cement mass. Concrete mixture may comprise (kg/m3) cement 300-500; filler 1590-2030; water 105-190; coarse filler (chip and/or gravel of grade 5-20 mm or 5-40 mm) and/or fine filler (sand of fineness not more than 5 mm). As fine filler at least one component selected from group containing quartz sand, sand from igneous formation, sand from metamorphic formation, haydite sand, and sand from blast-furnace dross is used. As coarse filler at least one component selected from group containing chip from igneous formation, chip from metamorphic formation, chip from sediment, chip from blast-furnace dross, etc. is used. Composition of present invention is useful in building industry for production of monolith and precast concrete and reinforced concrete construction, etc.
 Composition for improving of reservoir recovery / 2246605
Claimed 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.
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.
 Plugging mix / 2245989
Plugging 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.
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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FIELD: oil industry. SUBSTANCE: in the method for hydro-isolation of watered productive bed, including serial forcing into bed via tubing pipes string of isolation polymer substance - polymer solution with dispersion phase and then suspension of rubber powder, as dispersion phase water-resistant, but oil-soluble material is used, for example, special brand thermoelastoplast, and said dispersion phase until 20% is injected into rubber powder suspension. EFFECT: higher efficiency, higher oil yield. 1 tbl
The invention relates to the field of the oil industry, and in particular to methods of waterproofing flooded reservoir, mainly in fractured reservoirs. There is a method of waterproofing watered productive formation [ AMELIN B.A. and other New methods of non-metallic fastening boreholes, M., Nedra, 1964, s-74] by injection of polymer-clay mud. Also known “way to isolate the water in fractured reservoirs” [RU No. 2112875 C1, 1998], including sequential injection on the column tubing (tubing) insulating polymer material with the dispersed phase and the suspension of crumb rubber with a particle size of 0.1 to 3.5 mm This way the technical essence and the achieved result is closer to the offer and may be accepted as a prototype. A common shortcoming of these methods is that the dispersed phase in the form of clay particles contained in the injected into the layer of insulating material, getting into the oil-saturated part of the reservoir, reduces reservoir properties of the formation, which leads to reduction of the production capabilities of the formation. This recovery of reservoir properties reservoir with clay particles, trapped in the waterproofing work, time-consuming due to the inability of their extraction or destruction in place the new conditions. In addition, their use is not precluded by the removal of sand from the formation into the borehole, especially thin Sands. As you know, the sand from the reservoir occurs most often from layers filled with thin sand. The pores of such layers crumb rubber does not pass, and if and penetrates only partially, and when the well completion, they shall be in the hole, if this continues and the sand. The aim of the present invention is to improve the waterproofing properties of the insulation material, reducing the negative impact on reservoir properties of the formation and, therefore, increasing the production capabilities of the well. This goal is achieved due to the fact that in the method of waterproofing flooded reservoir, comprising the sequential injection of the column tubing into the layer of insulating polymeric material is a polymer solution with the dispersed phase, and then the suspension of crumb rubber as a dispersed phase using water-insoluble, but soluble in oil material, such as thermoplastic elastomer mark DST-30 or DST-RM, and found dispersed phase to 20% is introduced into the slurry of rubber crumb. Preliminary patent research retrospectivity 20 years has shown that technical solutions for a similar purpose, and obtain t is anyone positive effect is not detected, that allows to make a conclusion about the compliance of the offer with the criterion of “novelty and inventive step, and its industrial applicability is shown in its full description. The method is carried out in the following sequence. First, determine the way water shut-off and pick-up operations, as well as the expected pressure on the production casing. Further in the hole down the tubing with the packer in the productive interval of the formation in its roof, divide from the rest of the well. The first portion of the insulation material in the form of a polymer solution prepared in the field using traditional technology with the addition of the dispersed phase, which is soluble in oil, but water-insoluble material, such as thermoplastic elastomer mark DST-R or DST-RM, which is produced by the Voronezh plant thermoplastic elastomer JSC Voronezhsintezkauchuk” in the form of powder on THE 38.40327 - 98, 0 Liter., date of introduction 05.09.98,, DST-ZOR or DST-RM - are products of blogospherical styrene and butadiona in the solution of hydrocarbons in the presence of an organolithium initiator, thermoplastic elastomers soluble in light petroleum, benzene, toluene. Polymer insulation solution prepare fresh or waste water. The polymer in the solution using water is actuarily partially hydrolyzed, high molecular weight polyacrylamide with a concentration of 0.01 to of 0.05 wt.% or water-soluble cellulose ethers with a concentration of 0.01 - 0.1 wt.%, or salt-tolerant polymers of type DK - Drill, Proestol - 2540 with a concentration of 0.05 to 0.15 wt.%. Such concentrations of polymers ensure the stability of the suspension. The injection solution is performed using a pump units, for example, type CA - 320 M in the amount of 3 - 10 m3to meter the thickness of the layer, depending on its injection into a fracture, but not less than 10 m3while injection pressure gauge set on the mouth of the discharge line, and the volume flow of the solution. The polymer solution-based thermoplastic elastomer, falling into the water reservoir, particularly in the cracks and channels the flow of water, pushing her into the formation, creates a waterproof screen, and a thermoplastic elastomer, partially within the pores of the oil-saturated part of the reservoir in contact with oil, softens, and then during the development or during the operation of the well is taken out of the reservoir with oil. After injection into the reservoir of polymer solution estimated volume without interrupting the injection process, begin to pump the slurry of rubber crumb (RK), estimated 10 - 15 m3particle size RK is 0.1 is 3.5 mm, while the concentration in the range 8-30 wt.%. The concentration and size of the part of the Republic of Kazakhstan in suspension depends on the crack and pickup PLA is the same. As the dispersed phase of a suspension of Kazakhstan use the same powder of thermoplastic elastomer, type DST-R or DST-RM, at the same time as carrier particles in suspension using solutions of polymers. The introduction of the powder of thermoplastic elastomers in suspension RK produce on the basis of data obtained from experimental field work on a 1 m thick perforated interval of the formation, as reflected in the below table.
In the process of suspension injection RK control the pressure at the wellhead and the flow of the suspension of the RK. After injection of estimated volume of suspension RK it cut through the water, the packer lead to the transport position, and the hole left alone to restore equilibrium in the stalk portion of the well. Then the well is raybaut and learn one of the known methods. When downloading suspension of the Republic of Kazakhstan in the formation, the following occurs. The suspension of the Republic of Kazakhstan in the process of injection presses the previous portion of the polymer solution into the formation, whereby cracks and channels, primarily fills the dispersed phase in the form of a thermoplastic elastomer and rubber crumb, and thermoplastic elastomer in contact with oil, swelling, is like cementing element rocks with rubber crumb, thereby reliably blocking the way out not only the polymer solution injected into the first portion, and thin sand layers. Techno-economic benefit of the proposal is to increase the duration of the dry period oil or low sulfur) by creating a higher-quality screen, which prevents the output of the pre-injected polymer solution with a thermoplastic elastomer, which is achieved due to the presence of the latter in both portions of the injected solutions. The widespread use of the method in the oil fields will yield tangible economic benefits in reducing labor costs and time, as well as material resources. Method of waterproofing flooded reservoir, comprising the sequential injection of the column tubing into the layer of insulating polymeric material of Polym REGO solution with the dispersed phase, and then the slurry of rubber crumb characterized in that the dispersed phase using water-insoluble, but soluble in oil material such as a thermoplastic elastomer mark DST-30 or DST-RM, and found dispersed phase to 20% is introduced into the slurry of rubber crumb.
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