(E21B43/263)

Universal solid-fuel pressure generator // 2643838
FIELD: oil and gas industry.SUBSTANCE: pressure generator is a charge consisting of a set of solid fuel pellets having a cylindrical axial channel that are firmly attached to each other on lateral surfaces that are installed in the body of the device or on a geophysical cable. Laying of same type solid-fuel channel cartridge during generator assembly is produced by concentric rows around the central cartridge having a cylindrical axial channel. While the ratio of outer diameter of the central cartridge and the diameter of its channel is (2-7):1, the ratio outer diameter of same type solid cartridges to the diameter of their channel is (2-3):1, and the ratio of outer diameter of central cartridges and diameter of peripheral cartridges is (5-11):1. Gluing of cartridges is carried out on a length not more than 0.2 of the length of the cartridges from the side of both ends. In this case, the number of peripheral cartridges and their length are assigned depending on required pressure pulse, the maximum pressure and time of generator operation, that ensures its versatility when used in various structures of hull and open-body devices. Ignition of the gas generator is performed by means of electric heating element mounted in the outer row of peripheral cartridges in the area of their adhesion.EFFECT: increased efficiency of the pressure generator.3 cl, 5 dwg
ethod of formation gas dynamic treatment // 2643533
FIELD: oil and gas industry.SUBSTANCE: gas dynamic treatment method refers to oil and gas production industry and can be used for fracturing and gas dynamic treatment of oil-gas formation with combustion products of solid fuel (gas-generating) charges for improving hydrodynamic communication of the well with formation, including in wells with low formation pressure. The method involves creating excessive pressure in the well by acting with gaseous combustion products of powder charges on the formation. In this case, excessive pressure in the well is formed by superposition of converging pressure pulses from gas generating charges fired by single-time sections of the detonating cord that are initiated by two sealed explosive cartridges providing direction of detonation waves towards each other.EFFECT: improved hydrodynamic communication between the well and formation.1 dwg

Perforation and bottomhole treatment method and device for its implementation // 2633883
FIELD: oil and gas industry.SUBSTANCE: method includes the well perforation with the hollow carrier perforator and then performing the reservoir fracture, using the thermogas acid module, equipped with the solid fuel charge, performing, when it burns, gas releasing, that flows through the connector unit into the perforator casing and acting with the directed jets on the formed perforation channels. In the thermogas acid module, the non-detonating mixture composition is used as the solid fuel, which forms during combustion, the gas with the predominant content of the chemically active mixture of hydrochloric and hydrofluoric acids, due to which the chemical action on the reservoir bottomhole skeleton is created, composed of both carbonate and terrigenous rocks as well, and the silicate contaminants formed in the bottomhole zone during the drilling process and subsequent well cementation, and thereby additionally increase the dimensions of channels and cracks, decompress the perforation channels walls and provide the filtration surface growth in the productive reservoir, surrounding the channels. The gas effect on the perforation channels in the reservoir is produced in the form of impulse pressures. In this case, the method can be implemented using both single and multiple applications.EFFECT: increase of reliability and efficiency, simplification of carrying out and expansion of the reservoir perforation application conditions with separate subsequent start-up in the single device of the perforator and the thermogas acid module, while burning the solid fuel charge, the active mixture of hydrochloric and hydrofluoric acids is formed.2 cl, dwg

Explosive granule // 2612177
FIELD: mining.SUBSTANCE: group of inventions relates to mining and can be used in formation hydraulic fracturing. Described is explosive granule for fracture description in underground formation. Granule can contain housing, containing detonating substance and explosive substance, located inside housing. Granule can also contain non-explosive substance, movably arranged inside housing. Non-explosive substance motion can by friction develop specified amount of heat, sufficient for explosive substance detonation.EFFECT: technical result consists in improvement of hydraulic fracturing and description of fracture in underground formation efficiency.20 cl, 14 dwg

Device for treatment of bottom-hole zone // 2607668
FIELD: mining.SUBSTANCE: invention relates to mining industry and intended for productive formations opening in oil and gas wells during drilling and blasting operations. Device for bottom-hole zone treatment contains hollow-carrier perforator or capsule-type perforator in casing string with cumulative and gas-generating charge of solid fuel, combined with acid reagent. Cumulative charge recess lining is fluoroplastic or other fluorine- and/or chlorine-containing polymer material. Cumulative and gas-generating charges initiation from corresponding to each charge initiation device is carried out simultaneously. Solid fuel, combined with acid reagent, is ammonium perchlorate and epoxide compound mixture in following ratio of components, wt%: ammonium perchlorate – 70–90, epoxide compound – 30–10.EFFECT: enabling increasing efficiency of design well flow rate achievement, especially under carbonate reservoir conditions, elimination of well and its perforation channels blockage with fragments of cumulative charges sealed housing, elimination of casing pipes damage and deformation due to absence of metallic cumulative jet effect, improving acid reagent action efficiency.3 cl, 4 dwg

Universal solid-fuel well pressure generator // 2597302
FIELD: mining.SUBSTANCE: invention relates to solid-fuel pressure generators for intensification of oil and gas production, used in complex well treatment in pulse frame and frameless devices. Pressure generator consists of a set of solid-fuel blocks, rigidly attached to each other along side surfaces, installed in device frame or on a cable. Laying of single-type solid-fuel pellets in assembly of generator is carried out in concentric rows around central block, having a cylindrical axial channel. Ratio of outer diameter of central block and diameter of peripheral blocks is equal to (2.2-5.5):1. Gluing of blocks is performed on length of 0.065-0.1 of length of blocks on side of both ends. Number of peripheral blocks and their length is assigned depending on required pressure pulse, maximum pressure and time of operation of generator, that provides its versatility when used in different structures of frame and frameless pulse generator devices. Ignition of gas generator is performed by means of electric heating element, built into one of peripheral blocks of external row in area of gluing blocks.EFFECT: higher efficiency of pressure generator.1 cl, 6 dwg

Device and method of thermo-gas-hydro-depression wave fracturing of productive formations for development of hard-to-recover reserves (versions) // 2592910
FIELD: oil and gas industry. SUBSTANCE: group of inventions relates to oil and gas and mining industry and, in particular, to intensification of oil and gas wells and degassing of coal beds. Device includes a logging cable with a cable head and consists of remote control unit with gamma-sensor, an instrument head, adapter, gas-generating charge case and independent registration unit. Gas-generating charge is characterised by high-energy solid-fuel composition of the gas type. It is made up of one-piece blocks in a combination with grains tubular type with more intensive gas formation diameter 36…85 mm in length 200…1,500 mm with internal axial channel diameter 5…28 mm and an electric igniter. Said charge is arranged in case of steel oil pipes, titanium alloys or composite materials with diameter 102 mm with wall thickness 6.5…10 mm and channels for gas outlet area to 70 % of the cylindrical surface of the housing. Such design of charge provides during its combustion rate of increase of pressure in the well is more than 100 Mpa/s to achieve pressure pulse in 3-5 times higher than hydrostatic that provides creation of a single processing zonal branched layering of productive formation cracks in radius to 5-7 m and more. Recording of pressure and temperature dynamics independent digital devices in real time with discreteness 8.0…10.0 thousand measurements per second. To increase stability and gas generator advance emergency in well with zenith angle to 90° and more, a geophysical cable multilayer structure with diameter 8…28 mm with breaking strength 60…250 kN. EFFECT: technical result is higher efficiency and reliability. 6 cl, 3 dwg

ethod of productive formation processing and device for its implementation as per pgda-m technology // 2592865
FIELD: oil and gas industry. SUBSTANCE: group of inventions relates to oil and gas industry and can be used for productive formation processing. Method involves gas-dynamic formation fracturing by combustion in the productive formation interval of a powder charge of solid-propellant material with a filler burning-stabiliser having a round central channel with simultaneous accumulation of powder gases pressure in the central charge channel cavity, with further transfer of the charge combustion energy to the formation. Combustion of the powder charge is performed in several modes, wherein the number and the frequency of pulses depend on the combination of charges formed as blocks on cylindrical surfaces of which directed parallel to their central channel axis there are mutually perpendicular-longitudinal slots of an evenly even amount. Device comprises a caseless charge of solid-propellant material, connected to a conducting wire made as a cylindrical stick with an igniter and the central channel, having the ratio of length to diameter equal to (30-38): 1. Note here that on the cylindrical surface of the stick parallel to the axis of its central channel there are mutually perpendicular-longitudinal slots, and their number is evenly even, which ensures the possibility of alternating the charges depending upon the method: 4+8 or 4+8+12, while two of the slots have a flexible element connected with the conducting wire. EFFECT: technical result consists in improved efficiency of affecting on oil-and-gas-bearing formations. 4 cl, 6 dwg
ethod for gas-dynamic action on formation // 2582353
FIELD: oil industry.SUBSTANCE: invention relates to oil production technologies and can be used for gas-dynamic action on formation. Method involves cumulative perforation well interval with formation in well casing string and in mine rock of grouped perforation channels for fluid inflow, subsequent operation of pressure generators and their impact on formation through grouped perforation channels for fluid inflow to form in mine rock of rock individual fractures in direction of each perforation channel. At that, adjacent perforation channels in group are directed in opposite directions. Linear distance between perforation channels in group is different or equal to linear distance between groups of perforation channels.EFFECT: technical result consists in improvement of efficiency of gas-dynamic action on formation.6 cl, 4 dwg, 2 ex

Hydraulic fracturing method and device for low-permeable oil-and-gas-bearing formations // 2574652
FIELD: oil and gas industry.SUBSTANCE: before operations of hydraulic fracturing in the productive formation by means of explosion nearfield is created as cavity with initial cracks, whereto borehole electrohydraulic device is placed and breakdown fluid is supplied. Hydraulic fracturing of the formation is made by formation pressure pulses in the operating fluid due to electrohydraulic discharges in the operating breakdown fluid by continuous or periodical supply of electric energy to the well and its accumulation in the area of hydraulic fracturing up to the required level with further switching - delivery of accumulated energy to discharge electrode system of the borehole electrohydraulic device. Created fractures are formed in the cavity along stratifications or thickness of the productive formation.EFFECT: higher oil and gas recovery efficiency.2 cl, 6 dwg

System and method for rock fracturing in dense rock strata // 2574425
FIELD: mining.SUBSTANCE: in compliance with one version, one or several wells are drilled to collector. Note here that every well comprises the main borehole with two or several side holes drilled from the main borehole. One or several blast charges are placed in two or several lateral boreholes. Blast charges are blown up to develop pressure pulses that partially break the rock between two or several lateral boreholes. Blasts are timed so that one or several pressure pulses from different lateral boreholes interact.EFFECT: higher efficiency of rock fracturing.22 cl, 13 dwg

ethod for treatment of reservoir with high-viscous oil by combustible and oxidising composition // 2571963
FIELD: oil and gas industry.SUBSTANCE: invention may be used for treatment of reservoir with high-viscous oil by heated gas generated at combustion of liquid combustible and oxidising composition (COC). The method includes running in tubing to the well, injecting combustible and oxidising composition (COC) to the tubing, running in ignition source at a cable to the tubing to COC interval, delivering control signal to the cable and igniting COC. At the wellhead the tubing string is equipped at the bottom with combustion chamber, burner, the first thermal couple with extension cord and above the combustion chamber the tubing string is equipped with a thermal packer and the second thermal couple, the string is run in to the well, at the well mouth the extension cord is connected to the device measuring temperature of both thermal couples, and the thermal packer is set to the well. Through the tubing string an ignition source represented by an electrical flame igniter is run in at a cable to the burner, COC is injected from the wellhead by means of a pump to the tubing with permanent flow rate; when COC reached the burner of the combustion chamber the flame igniter is actuated by delivery of control signal to the cable, COC is flamed in the burner of the combustion chamber and the cable is removed from the tubing. Combustion temperature is controlled within the reservoir treatment interval by the first thermal couple while temperature in annular space over the thermal packer is controlled by the second thermal couple. When combustion temperature increases within treated reservoir interval and/or in annular space above the permitted temperature value within treated reservoir interval and/or temperature destructing the well casing then COC delivery is decreased; when combustion temperature decreases within treated reservoir interval below the permitted temperature value COC delivery is increased on condition that temperature in annular space does not exceed permitted temperature at which the well casing is destructed.EFFECT: improved reliability of the method implementation.2 dwg

Device for pressure limitation in well and method of fracturing of productive formation by pressure of powder gases using named device // 2569649
FIELD: mining.SUBSTANCE: device contains sealed pig-iron vessel with cylindrical cavity with a ring ledge. It has the piston with the ring insert from quick-cutting steel. Note that the piston diameter is determined from the given approximate ratio. For the formation fracture by pressure of powder gases the device is suspended together with a gas generator on the cable below the level of perforation zone and the operations are repeated with increase of weight of gas generator charge up to the most allowable. After that the additional operations of fracturing by additional charge are performed. For the first additional operation of fracturing the charge is selected, which is larger in comparison with the charge used in fracturing operation with maximum pressure by the value determined from the given approximate ratio. For the subsequent fracturing operations the similar pressure limiters are used. The respective additional charges are selected in view of the length of cutting of internal walls of cylindrical cavity during the previous fracturing operation according to approximate expression.EFFECT: improving the efficiency of productive formation fracturing.2 cl, 1 dwg

Formation fracturing method and device for its implementation // 2569389
FIELD: mining.SUBSTANCE: method includes the stimulation of reservoir fluid and rock by the pressure of accumulated gaseous products of solid fuel burning. Gases are accumulated in two gas-accumulating sections, the internal volume of each of them is equal from 10 to 18 l, at combustion at least in one of sections of solid fuel charge weighing 6 kg minimum, with increased gas generation from 1100 l/kg. Gases are discharged through gas-distributing section, in one or several stages, evenly along the whole width of the processed layer interval. For discharge of gases at the pre-set pressure the burst dome-shaped diaphragms made of thin-sheet roll are used, providing dispersion of operation pressure no more than 5%.EFFECT: improvement of efficiency and safety of fracturing technology.9 cl, 2 dwg

ethod for efficiency improvement in injection and intensification of oil and gas production // 2567877
FIELD: oil and gas industry.SUBSTANCE: well perforation method consists in loading of reactive shaped charge to the case, at that reactive shaped charge includes reactive barrel with components selected of metals and metal oxides; running down of the case with charge to the wellbore and placement close to underground stratum; explosion of shaped charge in order to initiate the first and second explosions, at that the first explosion creates a perforated tunnel in the adjoining stratum, and this perforated stratum has breakage zone placed along its walls while the second explosion is initiated by the first explosion and created by exothermal intermetallic reaction between the reactive components of the shaped charge barrel. The second explosion expels fragmentary material from the breakage zone inside the perforated tunnel to the wellbore and leads to at least one fracturing at the end of perforated tunnel, and at least one fracturing includes fracturing of the stratum containing hydrocarbons and is connected to inner part of the perforated tunnel; and injection of fluid containing propping agent to the perforated tunnel under pressure sufficient for penetration of injected fluid to at least one fracturing at the end of the perforated tunnel so that propping agent is introduced there and at least one fracturing of the stratum is maintained open in order to increase yield of hydrocarbons.EFFECT: increased injection efficiency and intensification of oil and gas production from underground stratum.8 cl, 20 dwg, 1 tbl

Device for bench testing of solid propellant charges // 2566852
FIELD: test hardware.SUBSTANCE: claimed device comprises vertical sealed cylindrical case with detachable top cover to support electric conductor and compressed inert gas feed union (up to 12 MPa). The cover has at least two pressure release safety valves and solid propellant support bracket. Besides, the device case houses at least two types of transducers to measure pressure and temperature inside the device and to measure temperature and vibration of the walls. Note here that multichannel parameter measurement and processing system is used to collect the data from the transducers.EFFECT: increased data content of tests.2 dwg

ethod for formation treatment with combustible and oxidising composition // 2566544
FIELD: oil and gas industry.SUBSTANCE: method includes running in tubing to the well, injecting combustible and oxidising composition (COC) to the tubing, running in ignition source at a cable to the tubing to COC interval, delivering control signal to the cable and igniting COC. At the wellhead bottom part of the tubing is equipped with a combustion chamber and burned faced outside, and to the upper end of the burner a thermocouple is fixed with an extension cord. At the wellhead the upper end of the extension cord is fixed to a device measuring temperature. Thereafter source of ignition, which is an electric flame igniter, is run in into tubing-casing annulus up to openings in the burner. Then from the wellhead permanent injection of COC is started to the tubing by means of a pump. At that COC of the following composition is used in wt %: ammonium nitrate - 65.8%; 2% aqueous solution of polyacrylamide - 28.2%; potassium bichromate - 1%; ethylene glycol - 5%. When COC reaches openings of the burner the electric flame igniter is actuated by delivery of control signal to the cable, COC is ignited. The cable with electric flame igniter is removed from the tubing, burning temperature is controlled in the interval of formation treatment by the device measuring temperature. When burning temperature is increased within the interval of treated formation above the permitted value COC delivery to the tubing is reduced, and when burning temperature is decreased within the interval of treated formation below the permitted value COC delivery to the tubing is increased.EFFECT: increased reliability and quality of formation treatment.2 dwg

Treatment method of bottom-hole zone for high-viscous oil formation with combustible oxidation compound // 2566543
FIELD: oil and gas industry.SUBSTANCE: method includes running in tubing to the well, injecting combustible and oxidizing composition (COC) to the tubing, running in ignition source at a cable to the tubing to COC interval, delivering control signal to the cable and igniting COC. At the wellhead bottom of the tubing string is equipped with a combustion chamber with burner. At that upstream the combustion chamber the tubing string is equipped with a packer, run in the tubing string to the well so that the packer is set at distance of 30 m above the formation roof. Thereafter through the tubing string at electrical cable combined with fibre-optic cable the ignition source is run in up till it contacts the burner, then injection of COC is started to the tubing string with permanent rate. At that COC of the following composition is used in wt %: ammonium nitrate - 45.5; 2% aqueous solution of polyacrylamide - 19.5; potassium bichromate - 5; ethylene glycol - 30. When COC reaches the burner of combustion chamber the electric igniter is actuated by control signal sent to the electric cable, COC ignition takes place in the burner of combustion chamber. Ignition and commencement of COC combustion in the combustion chamber is monitored. Thereupon the electric cable combined with fibre-optic cable is removed from the tubing string, the packer is set in the well, COC combustion and heating of high-viscous oil is continued till viscosity decreases up to the value sufficient for product extraction with pump equipment.EFFECT: improved efficiency in heating of high-viscous oil formation and reliability of the method implementation.2 dwg

ethod of development of low-permeable oil deposits // 2547848
FIELD: oil and gas industry.SUBSTANCE: invention relates to oil production industry and can be used during development of pure oil deposits with low-permeable reservoirs. Method of development of low-permeable oil deposits includes drilling of the production and injection wells as per in-line development system using the hydraulic fracturing in all wells. Rows of injection and production wells are arranged in parallel and alternating by one in direction of the maximum horizontal stresses of the reservoir. At that the production and injection wells are drilled with horizontal bores in direction of the maximum horizontal stresses with multi-stage hydraulic fracturing.EFFECT: increased rate of oil extraction and reduced density of wells grid.3 dwg, 2 ex
ethod of thermochemical fracturing // 2527437
FIELD: mining.SUBSTANCE: invention relates to mining and can be used for thermochemical fracturing. The method consists in use of energy of the oxidation reaction of gel-forming compound, initiated by the reaction initiator for fracturing, and proceeding in the bottom-hole area of layer remote from the well. At that the catalyst, the fuel and the initiator are used in the form of solutions in water.EFFECT: increasing the efficiency of fracturing operations and creation of network of extended cracks which enables to increase significantly the productivity of oil and gas wells.

ethod of methane extraction from coal seam // 2521098
FIELD: mining.SUBSTANCE: invention relates to mining and can be used for methane production from coal seams. Proposed method comprises drilling or opening of used vertical well at methane-coal bed and determination of seam depth in well cross-section. Coal grade composition is defined and short high-pressure directed pulses source is fitted via working interval of vertical well in said methane-coal bed. Said bed is subjected to the effects of energy of plasma generated by the blast of calibrated metallic conductor as intermittent directed short high-pressure pulses. The number of high-pressure pulses and duration of said effects in interval of methane-coal bed is defined by bed depth in well cross-section and coal grade composition.EFFECT: higher efficiency of methane production, lower costs and higher safety.1 dwg

Device for propellant stimulation of well productive bed at well bottom zone // 2514036
FIELD: oil-and-gas industry.SUBSTANCE: proposed device comprises several caseless channel-type solid-propellant charges of ballistic fuel collected by logging cable resting on end surfaces and extending through axial channel of all charges and fasteners. Simultaneous ignition of all charges is performed by two igniting charges arranged at the device ends. All charges featured charge length-to-channel diameter ratio of 50:1.Outer ends of igniting charges have parts arranged to rule out the logging cable twisting relative to said charges at device vertical lifting and lowering. Logging cable section extending through the channel of all charges and top charge similar-length section abutting thereon ate thermally isolated by Thiokol sealant. Inserts with outer surface coated anti-combustion composition are arranged at one of the ends of every charge. Blocks made of polymer sheet are glued to charge side surfaces.EFFECT: higher efficiency of production.2 cl, 5 dwg

Device for productive formation treatment with propellant charge and bag // 2503807
FIELD: oil and gas industry.SUBSTANCE: device includes wire-line, unpackaged cylindrical propellant charge with igniter and accessories. According to invention the propellant charge is closed by rigid combustible bag that provides the reduction of charge deformation at high temperatures in well and generation of additional energy quantity. Rigid combustible bag consists of the following components, wt %: thermosetting polymer compound - 30…37; pyroxiline fibre - 18…22; explosive component - 42…48 and plus 100%: ethyl alcohol - 10, wetting agent - 0.1.EFFECT: increase of device operation reliability at increased temperature influences.1 dwg

Processing method of bottom-hole formation zone with charge at increased temperatures // 2502867
FIELD: oil and gas industry.SUBSTANCE: method involves creation of excess pressure in a well by action on a formation with gaseous combustion products of propellant charge. According to the method, at prolonged high-temperature action on propellant charge at its lowering into the well, propellant charge is used together with a stiff combustible cap that contains the following components, wt %: thermoreactive polymer composition - 30…37; pyroxiline fibre - 18…22; explosive component - 42…48 and over 100%: ethyl alcohol - 10; wetting agent - 0.1.EFFECT: increasing safety of a processing method of bottom-hole formation zone and its efficiency owing to reducing deformation of propellant charge.1 ex, 1 dwg

Firing device for powder pressure generators // 2495015
FIELD: oil and gas industry.SUBSTANCE: invention is referred to an oil-and-gas industry, ferrous industry, oil and gas wells, water-supply wells, injection wells, and also to blasting works and it is purposed for equipment of powder pressure generators, first of all, capsule-type sealed generators designed for explosion and thermal-gas-chemical treatment of bottomhole formation zone by fire gases in order to intensify extraction of mineral products. Firing device contains blasting cartridge of electric type in protective shell or safe mechanical detonator without initial detonating agent, secondary cartridge of mixed solid fuel placed inside a perforated metal tube and detonating cord in a metal shell or exploding wire placed in a channel of secondary cartridge block at its symmetry axis.EFFECT: invention allows essential increase in stability of ignition of the secondary and primary charge of a gas generator thus reducing costs for wells retreatment, elimination of expensive equipment and accessories such as exploders, logging cable, and increase in safety of well operations.2 cl, 1 dwg

Device and method for thermal gas-hydrodynamic oil and gas formation fracture (versions) // 2493352
FIELD: oil and gas industry.SUBSTANCE: device for thermal gas-hydrodynamic oil and gas formation fracture comprises a logging cable with a cable head and consists of a remote control unit with a gamma sensor, an instrument head, a mandrel sub, a gas-generating charge case and an independent logging unit. The gas-generating charge of a high-energy antiknock solid-fuel composition is presented in the form of sticks of the external diameter of 36-70 mm and the length of 300-1500 mm with an axial passage of the diameter of 5-28 mm with an electrical igniter. The charge is positioned in a case of the diameter of 89 mm with a wall of the thickness of 9-11 mm and a gas outlet channel of the area of 70% a cylindrical surface of the case with end adapters of the diameter of 105 mm. The adapters are used as formation targeting raisers with the efficiency of the dynamic action effectiveness being a multiple greater than uncased gas generators. The real-time pressure and temperature time history is recorded by independent digital devices at the discretion of 8.0-10.0 thousand measurements per second. To provide better emergency tolerance and to make the gas generator advance into wells at a zenith of 90° or more, the multilayered logging cable of the diameter of 8-28 mm and the tensile strength of 60-250 kN is used.EFFECT: more effective involvement of terminal oil-saturated sites.3 cl, 2 dwg, 1 app

Heat source for thermal-gas-hydraulic rupture of bed // 2492319
FIELD: mining.SUBSTANCE: heat source comprises a body, which is equipped with a composite material that generates gas during combustion and actuates from an electric spiral, and layers of epoxide compound and thiocol-based sealant sealing the ends of the material of the gas-generating composition. The composite material of the heat source that generates gas during combustion contains efficient amount 20 wt % of powdery polyvinyl chloride chlorinated resin of brand PSH-LS at the following ratio of composition components, wt %: granulated ammonium nitrate of grade B - 57.0±0.2; potassium bichromate - 3.0±0.1; aluminium powder of grade ASD-4 - 5.0±0.1; barium nitrate - 15.0±0.2; polyvinyl chloride resin of grade PSH-LS - 20.0±0.2. The gap produced in the outfit between sticks and the body of the heat source is filled with a filling solution capable of hardening. Between the igniter and the composite material the heat source comprises layers of additional igniting composition with the capability of its ignition from the igniter and ignition of the gas-generating composition at the end and along the surface of the heat source channel.EFFECT: increased safety of operation, transportation and storage of a device for hydraulic rupture of a bed.2 dwg

Gas-dynamic formation fracturing method // 2485307
FIELD: oil and gas industry.SUBSTANCE: method involves assembly of a pressure generator in the form of a group of cylindrical solid fuel charges with central through channels, lowering of the pressure generator to the well, installation of the pressure generator at the specified depth of the well, supply of a signal for ignition of charges and fracturing of the formation. In the existing casing string of the well, preliminary perforation density is performed as 30-45 holes per running metre, assembly of a pressure generator is performed out of three groups of solid fuel charges with location of charges of the first group below charges of the second and the third groups; the pressure generator is installed in the well above the perforation interval so that ratio of distance between upper perforation boundary and lower charge of the first group to length of perforation interval comprises the value of 0.3-0.6. The first group of charges has a charge with an igniter and total design weight of all charges, which provides the possibility of ignition of above located charges of the second group with the developed combustion surface and gas emission at combustion, which provides opening of existing vertical fractures in the formation and initiation of combustion of charges of the third group, which provide non-reversible deformation of mine rocks of the formation with creation of a residual vertical fracture.EFFECT: improving filtration properties of the formation throughout its thickness.9 cl

Treatment method of bottom-hole formation zone, and device for its implementation // 2471974
FIELD: oil and gas industry.SUBSTANCE: excess pressure is created in the well by acting on the formation with gaseous combustion products of frameless cylindrical solid-fuel charge having igniter, central round channel and solid-fuel segments projecting on opposite cylindrical surfaces parallel to axis of central channel, with longitudinal slots made in them for the rope of the assembly device, and the distance between slots, which is equal to outer diameter of cylindrical part of charge. According to the invention, excess pressure controlled as to amplitude and duration is created in the well without deformation and fracture of charge, which is caused with excess critical pressure of combustion products in cavity of its channel relative to the charge environment. It is achieved by installation opposite the formation or near the formation of charge with through central round channel having the ratio of channel length to its diameter, which is equal to (22-38):1. Increase in duration of action on formation at decreased pressure is achieved by attachment to that charge of additional cylindrical solid-fuel charge with similar projecting segments with slots and its length-to-diameter ratio equal to (5-15):1 with straight end faces or with a groove on the end face. At that, ignition of additional charge in the well is performed from igniter of lower charge with through channel or from igniters of charges with through channels, which are located from above or from below of additional charge. Current supply wires from geophysical cable to igniter are passed through the channel or longitudinal slots of segments of charge having a through channel, and longitudinal slots of segments of additional charge.EFFECT: increasing treatment efficiency.2 cl, 2 dwg

Perforation and treatment method of bottom-hole zone, and device for its implementation // 2469180
FIELD: oil and gas industry.SUBSTANCE: method involves well perforation using a hollow-carrier perforator and further fracturing of formation using thermal gas generator, emission of gas during combustion of its fuel, which is supplied through the connecting assembly to perforator housing and directed jets acting on the formed perforation channels. As thermal gas generator fuel there used is mixed composition that is not detonable, which generates the gas during combustion with major content of chemical high-activity chlorhydric acid owing to which there created is chemical influence on the rock matrix and thus the sizes of channels and cracks are increased, walls of perforated channels are sealed and growth of filtration surface in productive formation is performed; at that, gas action on perforated channels in the formation is performed in the form of pulse pressures.EFFECT: increasing formation perforation efficiency together with start-up in common perforator device and thermal gas generator, at combustion of fuel of which high-activity chlorhydric acid is formed.2 cl, 4 dwg

Lining powder pressure generator // 2465447
FIELD: oil and gas production.SUBSTANCE: proposed pressure generator is intended for encased shaped-charge perforators, implosion devices and powder generator devices arranged on cable and made up of integral tubular lining charge to be secured on device case of cable surface. Said charge is composed of fragments secured on device case or cable surface, arranged one after another. Note here that said fragments are made from rod elements of ballistic artillery powder shaped to uniform tubular structures by gluing outer side surfaces of powder elements by nitrocellulose size.EFFECT: higher completeness of powder charge combustion and efficiency.

Powder channel pressure generator // 2460877
FIELD: oil and gas industry.SUBSTANCE: powder channel pressure generator lowered to the well by means of geophysical cable consists of powder charges made in the form of cylinders with a central channel and with holes made in side surface of powder charge, which are connected between the cover and tray by means of a rope. In upper and lower powder charges there installed are glowing filaments electrically connected to geophysical cable. Holes made in side surface of powder charge are inclined towards geophysical cable, and angle between central axis of powder charge and axis of hole in side surface of powder charge is less than 90°.EFFECT: improving efficiency of action on oil-water formations of solid fuel combustion products; improving installation accuracy of the device at the selected treatment interval; preventing the displacement of powder pressure generator after it is activated.6 cl, 6 dwg

Gas generator for oil and gas wells // 2456443
FIELD: oil and gas industry.SUBSTANCE: gas generator includes the main solid fuel charge, ignition device in cylindrical housing with sealing assemblies in upper and lower parts and fixed piston in upper part of cylindrical housing with possibility of its being cut at the specified external pressure, and temperature promoter. According to the invention, lower end of tubing string is plugged with plate with central hole for installation of hydraulic connection of tubing string and ignition device located in lower part of gas generator. A tube connecting the tubing string to the top of ignition device is inserted into that hole. External perforated housing with solid fuel for combustion transfer to the main solid fuel charge is arranged in addition in ignition device connected to the main solid fuel charge by means of clutch coupling. Lower part of ignition device is plugged with solid fuel plate and cylindrical perforated limit switch.EFFECT: thermal gas chemical treatment of wells with low flow rate and non-operating oil and gas wells.3 cl, 1 tbl, 1 dwg
Device for pulse alternating-sign processing of formation well bore zone // 2451173
FIELD: oil and gas production.SUBSTANCE: device is made in the form of implosive chamber. The role of a charge is performed by facing powder pressure generator made from elements of ballistite gun powder, located at the outer surface of implosive chamber casing with the possibility of approaching the wall of casing. There is the possibility of facing powder pressure generator ignition, generating of gaseous combustion products and pressure pulse with destruction - cracking of formation rocks in well bore zone and depressurisation of implosive chamber casing after pressure decrease till hydrostatical level. Note that there is provision of wave process of pressure fluctuations with the values of maximum and minimum pressure and duration providing further development of cracks in formation well bore zone.EFFECT: possibility to develop pressure generator for oil and gas production intensification on the base of gun powder that is characterised by reduced charge mass and comparable to the existing more powerful samples of generators in efficiency.2 cl

ethod and device for gas-hydrodynamic fracturing of productive formations for development of problematic reserves (variants) // 2442887
FIELD: oil and gas industry.SUBSTANCE: The invention relates to oil and gas industry, in particular, to methods and devices for intensifying well operation during the development of problematic reserves. The device for gas-hydrodynamic fracturing of productive formations in oil and gas wells includes a logging cable for descending the device and contains the device head and a load-bearing base in the form of metal rod where a gas-generation charge with a steam gauge unit is mounted. The gas-generating charge is a high-energy solid fuel non-detonating composition in the form of sticks with outer diameter of 36-110 mm, length of 500-1500 mm and axial channel diameter of 14-28 mm and an electric fuse. While the gas-generating charge is burning, the pressure increase rate of at least 100 MPa/sec is achieved with the maximum pressure being 2-4 times higher than the hydrostatic pressure. The pressure changing rate is measured with a self-contained digital steam gauge in real time with sensitivity of 7,0 - 10,0 thousand measurements per second. Furthermore, in order to reduce the accident rate and ensure that the gas generator movement in vertical and inclined wells with zenith angle up to 70°, a logging cable of multilayer composition is used with tensile strength of 120 - 160 kN and diameter equal to 12 - 18 mm. EFFECT: increased efficiency of developing oil-containing zones with slow-moving oil. 4 cl, 3 dwg, 4 ex

Heat gas generator for improvement of formation filtration in its well bore zone // 2439312
FIELD: oil and gas industry.SUBSTANCE: heat gas generator includes container, container suspension device in the well in the form of a pipe string, at least two gas-generating charges of solid fuel with various gas-generating capacity. Gas-generating charges are placed into the container in zones of radial holes distributed on side surface of the container. Besides, heat gas generator includes burning initiator of one of the solid fuel charges with lower gas-generating capacity, channel of burning transfer from one gas-generating charge to the other gas-generating charge with the specified burning time. Burning transfer channel has the possibility of preventing mutual penetration of combustion products. At that, length of burning transfer channel is 10-25% of the length of the preceding charge with lower gas-generating capacity and provides together with gas-generating charges a common mode of non-stationary action on well bore zone with the specified amplitude, time of action and rise of action power.EFFECT: increasing operating efficiency of the device.8 cl, 1 dwg
Formation hydraulic fracturing method using "khimeko" complex // 2439311
FIELD: oil and gas industry.SUBSTANCE: formation hydraulic fracturing method involving placement into the well interval at the depth of the planned hydraulic fracturing and above it of water-based gel of "Khimeko-V" complex with strong granular substance with fraction of 0.4-0.8 mm in the suspended state; placement in the well above the above said water-based gel of process liquid with density of 1.8-2.0 g/cm3; reduction of the level of well liquid to the level of 150-190 m from the well head, sealing of well head with possibility of liquid flow throttling and creation of cracks in the formation by means of water-based gel of "Khimeko-V" complex with the energy released at combustion of the charge placed in water-based gel zone of "Khimeko-V" complex and against geological differences of formation rocks and/or their disturbances; at that, total volume of water-based gel of "Khimeko-V" complex is assumed on the basis of 0.3-0.4 m3 per 1 running metre of effective thickness of the formation.EFFECT: increasing intensification effect of the product inflow from the formation owing to reducing the charge energy losses, increasing the operating safety and improving the effect of stable formation drainage in time.1 ex
Formation hydraulic fracturing method // 2439310
FIELD: oil and gas industry.SUBSTANCE: method involves placing into the well interval at the hydraulic fracturing and above it of viscous working liquid with propping agent with fraction of 0.4-0.8 mm in the suspended state; placing in the well above viscous working liquid of process liquid with density of 1.3-2.0 g/cm3 and creation of cracks in the formation by means of viscous working liquid with the energy released during the charge burning. The charge is placed in the viscous working liquid zone. At that, the liquid including the following components per 1 m3 is used as viscous working liquid: biocide "Biolan" - 0.005-0.007 l; gelling agent "GPG-3" - 4-5 kg; borate binding agent "BS-1" - 3-4 l; surface active substance - destruction modifying agent "KhV" - 1-3 l; propping agent - 100-300 kg; water is the rest.EFFECT: increasing intensification effect of the product inflow from the formation owing to reducing the charge energy losses, increasing the operating safety and improving the effect of stable formation drainage in time.3 cl, 1 ex

Procedures for formation fracturing and extraction of hydrocarbon fluid medium from formation // 2432460
FIELD: oil and gas production.SUBSTANCE: according to procedure for formation fracturing through borehole of well passing through rock bed cartridge of rocket fuel is placed in micro-borehole of well of diametre not over 13 cm and located at radial distance from borehole of well. Rocket fuel in a micro-borehole of the well is ignited and it creates pressure sufficient for formation fracturing. Heated fluid medium is directed into the formation through a net of fractures according to the procedure for supply of hydrocarbon fluid mediums from the formation with the net of fractures. Mobility of hydrocarbon fluid mediums in heated fluid medium is increased and hydrocarbon fluid mediums are extracted to surface. Also, through the borehole of the well crossing the formation the cartridge of rocket fuel is placed in the micro-borehole of the well of diametre not over 13 cm and located at radial distance from the borehole of the well, thus facilitating accessibility of the fracture net. Rocket fuel in the micro-borehole is ignited for creating pressure sufficient for formation fracturing allowing extended access to the net of formation fracturing.EFFECT: raised efficiency of procedure.9 cl, 5 dwg

Procedure and system for generation of fissures in geological bed surrounding borehole of well // 2417308
FIELD: oil and gas production.SUBSTANCE: procedure consists of following stages: arrangement of at least one heating device with case in well, in placement of fuel completely in case, in placement of processing material in case, also, this material contains solid precursor of acid, in ignition of means for igniting fuel device for fracturing at least one orifice in case, in combustion of fuel in at least one fuel device to raise pressure in borehole of well and to generate fissures in geological bed, and in supply of processing material via at least one orifice of case into fissures for combustion of fuel.EFFECT: raised efficiency of procedure and reliability of systems operation.21 cl, 8 dwg

Lining powder pressure generator pgdo // 2413069
FIELD: oil and gas industry.SUBSTANCE: lining powder pressure generator for hollow-carrier jet-type perforators and implosive devices is made in the form of common tubular lining charge fixed on the housing of the device. Common tubular lining charge is made in the form of a set of fragments subsequently fixed on the device housing one after the other. At that, fragments are made of rod elements of ballistite cannon powder in the form of homogeneous constructions in the form of pipe by bonding the edges of powder elements by cold curing polymer or in the form of flexible plates by binding powder elements by means of nitrocellulose or cotton band.EFFECT: improving efficiency of action of charges and simplifying the charge manufacturing procedure.2 dwg

Well compression impulse generator // 2404358
FIELD: oil and gas industry.SUBSTANCE: well compression impulse generator includes housing with ignition initiation system, in which charge system is located. Housing of charge system represents thin-wall strip cover divided into sections with plastic bushes with central holes filled with material-retarder. At that, material-retarder includes mixture of black powder with particle size of 100 mcm with addition of 6% of nitromethane and 3% of aluminium powder.EFFECT: providing action on well without damage to its integrity and seals of formation rock.4 cl, 7 dwg

Solid-fuel gas generator for coal bed degassing // 2401385
FIELD: mining.SUBSTANCE: proposed gas generator comprises armored and nonarmored tubular charges of solid fuel accommodated on geophysical cable with fireproof coat, detonation igniter including blast cartridge and detonating cord. Said detonation igniter is accommodated in armored charge, second is seen from below, and upper armored charges. Channel of lower armored charge accommodates igniter representing an electric igniter connected in series with blast cartridge at preset distance therefrom. Gas generator bottom face is tightly plugged.EFFECT: producing multiple elongated fractures in coal bed at low hydrostatic pressure, ruling out of gas generator upward travel.3 dwg
ethod of bench treatment // 2401381
FIELD: oil-and-gas production.SUBSTANCE: proposed method consists in that, first, bench is hydraulically fractured by hydraulic fracturing fluid to produce preset-length development fracture. Then hydraulically active fluid is pumped in the well and forced, by chaser, into the bench, formed fracture and adjoining rock pores. Said chaser reacts with water and suspension of aluminium-containing material activated by at least gallium, in anhydrous fluid-carrier to cause thermo baric effect on the bench so that rocks and fluid contained therein are heated by 20°C and higher due to decrease in oil viscosity to below 10 MPa·s, fluidising of paraffinic and asphaltene-pitchy hydrocarbons, extraction of gas-phase products and formation of asset of additional micro fractures branched off produced development hydraulic fracturing and communicated with the system of the bench natural fractures.EFFECT: higher filtration properties of bench.7 cl, 1 ex

ethod of well surveying on depression prior to beginning of production, and device for its implementation // 2399759
FIELD: oil and gas industry.SUBSTANCE: prior to the beginning of production there fixed are cumulative perforators (CP) in groups in number equal to the number of PF in the well on cable or on tubing string (TS). Geophysical instruments (GI) are fixed above CP at safe distance. Distances between CP and distances between GI are equal to the distances between productive formations (PF). The device is lowered to the well at the specified depth so that CP can be located in perforation intervals of each PF. Prior to the secondary drilling of PF with perforation the well is filled with liquid to the level providing design maximum depression value for the formation. Secondary drilling of PF is performed with perforation. Immediately after secondary drilling of PF there moved is geophysical cable or tubing string with CP and GI installed on them till the latter are located in perforation intervals of every PF. Investigations of process parametres of operation of each GI PF are performed. After dynamic level is recovered with fluid from formations or after the well is filled with fluid, geophysical cable or tubing string is removed to the surface. GI readings are taken for the purpose of recommendations on production process optimisation.EFFECT: improving accuracy of results of investigations, reducing the time required for investigations.2 cl, 1 dwg

ethod for development of hard-to-recover carbohydrates // 2395679
FIELD: mining.SUBSTANCE: method consists in arrangement of gas-dynamic rupture of bed by initiation of combustible mixture burning with release of high-temperature gaseous products and complex mechanical, thermal and physical-chemical impact at bed. Water combustible-oxidant mixture is used, which is prior to initiation of its burning is pumped into well. Its burning is initiated with the help of powder pressure generator, providing for additional formation of minor cracks net in bed, and their size is increased at the stage of water combustible-oxidant mixture burning. Burning temperature in zone of combustible-oxidant mixture burning is maintained as 1100-1600°K. Gas-dynamic rupture of bed is carried out, properties of which in process of dynamic loading provide for their irreversible deformation with residual cracks, which do not require fixation.EFFECT: simplified technology of method implementation and reduction of costs for its realisation.1 ex, 1 tbl

Procedure for treatment of bottomhole zone of reservoir of well // 2394983
FIELD: oil and gas production.SUBSTANCE: procedure consists in lowering immersed pressure pulse generator into well. The generator includes a case with a working agent positioned into it, an initiating element made in form of a single unit with it, a bursting element and nozzle orifices. Further, the procedure consists in initiating the working agent and in pulse treatment of a perforation interval. Also as a working agent, generating gas at combustion, there is used a composite material on base of granulated ammonia nitrate and epoxy compound of weight facilitating generation of gaseous products at amount of not less, than 800 l/kg, pulse amplitude 1.10-1.35 of rock pressure of treated reservoir, duration of pulses up to one minute and pulse frequency for this time not less, than 14-15 pulses. Prior to the said main pulse treatment of the perforation interval there is performed a preliminary pulse treatment of the same interval of duration up to 0.005 sec, frequency for this period not less, than 4 pulses and value of the highest pulse amplitude up to 5-6 units of rock pressure. The same working agent out of gas generating composite material is used for this purpose as for successive main pulse treatment. During combustion weight of this material facilitates pressure of actuation of the bursting element in the immersed generator within the range from 80 to 100 MPa.EFFECT: raised efficiency of pulse treatment of wells due to generation of micro and deeper fissures in bottomhole zone of reservoir increasing permeability.2 dwg

ethod of stratum opening // 2392426
FIELD: oil and gas industry.SUBSTANCE: invention relates to oil producing industry, in particular - to methods for opening productive oil and gas strata by way of perforation with the help of explosives. The stratum opening method involves pumping a breakdown agent into the well as represented by a viscoelastic liquid whose time of relaxation after a deformation impact is equal to at least the period of hydropercussive wave action, perforator release, stratum perforation and well sealing. First one prepares the viscoelastic liquid mixing it with hollow glass microspheres whose mechanic strength exceeds bottom-hole pressure inside the well by 0.5-1 MPa in an amount of 10-30% of its volume and increasing its weight for the density to exceed the well fluid density by a factor of 1.1-1.2 which is then pumped into the well followed by release of the perforate on the pump and compressor pipes pre-equipped with a destroyable membrane and a fuse. Then one decreases the bottom-hole pressure inside the well to provide for generation of an influx from the stratum filling the pump and compressor pipes with lightweight fluid with the well sealing performed in the space behind the pipes with the help of a packer system.EFFECT: improved efficiency of explosion works in deep wells combined with provision for protection against destruction of equipment inside the well positioned in proximity to the explosion zone.3 cl, 2 dwg

Localisation and liquidation technology of oil lens by means of forced facilities // 2386802
FIELD: oil-and-gas production.SUBSTANCE: localisation and liquidation localisation of oil lens from subsurface layers of soil includes definition of lens boundaries, drilling of wells, localisation of lens and displacement of oil to the surface. Localisation is implemented by means of passing by contour of oil lens of wells or bore pits, after what it is implemented its loading by explosive of such mass and power, at which after explosion it is implemented creation of oil-water-proof of internal envelope, blocking oil lens by means of sealing and melting of ground. Liquidation includes multiple sequential explosions in the same wells or bore pits occurring shocks of which displaces oil lens from soil. It is possible application of additional ground watering with target of increasing of its density and by this increasing of effectiveness of shock impact which directly moves oil lens upwards.EFFECT: invention increases effectiveness of oil extraction of oil from soil increasing effectiveness of labour, improves ecology, releases soil from oil pollution.2 cl, 11 dwg

ethod of oil extraction from waste oil field // 2386024
FIELD: oil-and-gas production.SUBSTANCE: method is based on creation of pressure in oil-bearing strata ensured by laying of charges and its simultaneous blasting in oil development wells located by perimetres of waste oil field. Additionally charge laying is implemented by perimetre of oil field next nearest. Then it is implemented blasting simultaneously in all wells of enabled perimetres. Pumping of free oil is implemented through wells located by spare earlier perimetres of waste oil field.EFFECT: effectiveness increase of petroleum production.1 dwg
 
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