Steam-gas generator

FIELD: oil and gas industry.

SUBSTANCE: steam-gas generator contains a ballasting component cooled combustion chamber and the mixing head. Mixing head includes an oxidant, the fuel supply unit, the component feed unit is ballasted with fired bottom. In the mentioned blocks uniformly coaxially-jet nozzles are mounted in the circles. Moreover, a regenerative cooling path cavity combustion chamber is connected to the cavity of the supply unit is ballasted component. In the internal cavity of the combustion chamber, the tubular heat transfer elements are arranged parallel to its axis. Wherein one end of each of the tubular heat transfer element mounted in the combustion bottom ballasting component feed unit and the other end of said heat exchange element coaxially mounted in a shaped channel formed in the bottom, placed at the outlet of the combustion chamber, gas pipe fixed to the bottom.

EFFECT: increased efficiency of thermal effects on the oil reservoir by mixing in steam-gas generator formed in the flue gas produced by it with steam and feeding the resulting gas mixture into the oil reservoir.

2 cl, 3 dwg

 



 

Same patents:

FIELD: oil and gas industry.

SUBSTANCE: steam-gas generator for production of oil and gas condensate comprises a closed cabin with steam-gas generator mounted on the gate connected in series to adapter, tubing head, adapter and casing head of the injecting well at the deposit. Besides the generator comprises gas turbine with ejector and regenerator, piston-type compressor, electric board and electric generator coupled to gas turbine. At that the closed cabin with a door and lifting eyes comprises radiator and blower with electric motor in order to cool cooling fluid in combustion chamber of the steam-gas generator, supports with retractable rods for mounting at concrete base, water and fuel tanks placed at the cabin walls, gate couple at one side to piston-type compressor and on the other side to regenerator air duct, gas turbine placed at the cabin roof. The steam-gas generator comprises combustion chamber complete with a jacket for recirculation of cooling fluid in space between walls, with a cover and inlet valve for compressed air heated in the regenerator up to temperature of 600-700C, outlet valve for discharge of exhaust gas to ejector and gas turbine with outlet pipe connected to inlet pipe of the regenerator or to outlet valve with tube. At that the valve gear includes a cylinder with valve piston and spring having a channel for inlet under the valve piston of compressed air from receiver equipped with return valve coupled to the piston-type compressor. Cylinder has openings for discharge of combustion products into circular cylindrical channel with nozzles installed there for injection of water and generation of stream-gas mixture. The combined nozzle comprises a body with tubes to deliver electrically conducting fluid, which are connected to cylindrical channels placed inside the body in the layer of electrically insulating material in parallel to fuel nozzle; at one side of the tubes there are electrodes connected to pulse generator and on the other side there nozzles directed at angle towards each other and interconnected by blasting chamber of the nozzle with orifice. At that regenerator for compressed air heating is made with start-up fuel nozzle, blower and electric motor.

EFFECT: increased oil recovery of the deposit reservoirs.

6 dwg

FIELD: oil and gas industry.

SUBSTANCE: group of inventions relates to the field of oil industry and can be used for enhanced oil recovery of the reservoir in the development of water-flooded reservoirs with viscous oil and bitumen at a late stage of development. The method comprises opening the reservoir with the ability to transfer the production well into the injection one, the reservoir processing, keeping the hole without any influence, intake of oil from the reservoir. At that a system of microwave electromagnetic generators with radiation frequency of 2.5 GHz is lowered into the injection well, connected to the slot antenna using the feeder. The length of the slot antenna is selected equal to the thickness of the aquifer of the reservoir. In the mode of injection, the water injection into the reservoir is carried out with simultaneous influence on the reservoir with microwave electromagnetic field, the radiation power is determined by the time of heating of the water injected in the downhole to the desired temperature. When filling 5-10% of the volume of the pore space of the formation, the well is maintained, the well is transferred into the production well, and the liquid intake from the production well is carried out.

EFFECT: increase of the effectiveness and economical efficiency of development of water-flooded reservoirs of high-viscosity oil, intensification of oil production in water-flooded reservoirs of high-viscosity oil by increasing the coverage with influence to the reservoir with heating in the bottomhole area of the reservoir of the production wells.

2 cl, 3 dwg

FIELD: oil and gas industry.

SUBSTANCE: in a development method for a deposit of high-viscosity oil or bitumen including construction of the upper injector and the lower producer with horizontal sections placed one over the other the above sections are equipped with filters, at that a pipe string of a pipe-in-pipe type with inner spaces isolated from each other by packers is run down to the injector while output openings of the pipe strings are placed in the filter and spread along the length of the horizontal section dividing it into heating zones, injection of a heat carrier through the horizontal injector with the stratum heating, creation of a steam chamber and extraction of the product through the horizontal producer, at that thermograms of the steam chambers are recorded, the heating state is analyzed regarding the evenness of heating and availability of temperature peaks, considering the obtained thermograms even heating of the steam chamber is made by changing the heating zones and delivery of a required quantity of the heat carrier to the respective pipe string in order to exclude the breakthrough of the heat carrier to the producer through the most heated zone, at construction of the injector with a horizontal section for evener heating of the stratum the filters and pipe strings are made with an increased total cross-section area of the openings from the beginning of the horizontal section in the stratum towards the bottomhole. During operation upon a 3-5 time increase in viscosity of the extracted product injection of the heat carrier to the injector is stopped and a gaseous hydrocarbon solvent is injected through the respective pipe string to the heating zone with the least temperature until the temperature of the extracted product is reduced per 10-25%. Thereafter injection cycles of vapour and gaseous hydrocarbon solution to the respective heating zones and product extraction are repeated.

EFFECT: enabling continuous control over the change in viscosity of the extracted product, potential regulation of the injection process, even heating of the stratum, increased output of high-viscosity oil and bitumen with the simultaneous reduction of material costs and energy consumption.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: method of high-viscosity oil field production with horizontal wells involves drilling of two horizontal wells, injector and producer, in the oil reservoir thickness. Producer is positioned below injector level, steam is injected to the injector and oil is swept from producer, presence of bottom water is checked, and if present, minimum height of producer path above water and oil interface, optimum distance between producer and injector, minimum distance from injector to formation top, and optimum thickness of oil reservoir allowing for parallel position of the producer and injector in the same vertical plane are determined, and if oil reservoir thickness drops below the optimum, injector drilling path in the oil reservoir space against the producer is modified by reducing the vertical distance between the wells, and injector is lead away from the producer in horizontal plane with account of reservoir anisotropy, preserving permeability gradient between the injector and producer.

EFFECT: enhanced efficiency of thermal effect on field with low constant and variable thickness of oil reservoir.

2 tbl, 1 ex, 3 dwg

FIELD: oil and gas industry.

SUBSTANCE: according to the method upper layer of gas hydrate mass is melted gradually by heating gas hydrate mass in bottom sediments of a water body up to temperature of 50-60C. Heating is made by a heating element made as blade edge located along diameter of a cargo container lowered from a flotation device. The flotation device is made as a mobile underwater vehicle with retractable tract in the form of a container equipped with blade edge in the bottom part connected to heating elements inside container. Stability of the mobile underwater vehicle is endured in regard to the bottom of the water body. Container is rotated and electric current is supplied to heating elements. Gas hydrate stratum is heated up to 50-60C. The container is lowered with rotation to the gas hydrate stratum with provision of single-point recovery of hydrates from the above stratum in solid state.

EFFECT: reduced material and operational expenditures and ecological consequences at gas hydrate extraction territory.

2 cl, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: method includes production of gas hydrates, their transportation to a consumer and decomposition of gas hydrates with gas recovery. Gas hydrate recovery process is implemented at thermodynamic parameters corresponding to formation of gas hydrates. Transportation of gas hydrates is performed in sealed and heat insulated cargo spaces of a vehicle at thermodynamic parameters excluding decomposition of gas hydrates. Decomposition of gas hydrates with gas recovery upon completed transportation is made by reduction of pressure in cargo space of a vehicle up to atmospheric pressure. Process of gas hydrate recovery and their storage during transportation is carried out at temperature of -0.2C and pressure of 1 MPa. At that gas hydrates are withdrawn in hydrate state as briquettes by n-containers run down in sequence to submarine reservoir of gas hydrates from a submarine vehicle. The submarine reservoir of gas hydrates is heated up by heating elements located at edges of n-containers. Each n-container is buried in sequence to submarine reservoir of gas hydrates to the depth twice exceeding the container height. Upon loading of each n-container by free falling of gas hydrates they are loaded to cargo space of a vehicle. The vehicle is made as a submarine vessel. While heating submarine reservoir of gas hydrates only reservoir section under the container is heated. Containers are filled with gas hydrates represented by briquettes of natural metastable mineral in hydrate solid state.

EFFECT: improving efficiency in recovery and transportation of gas hydrates due to reduced consumption of energy and reduced capital and current costs.

2 cl, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: under method the first device is installed in the horizontal well. Firth fluid is injected in the first horizontal well via the first device. HCs production is ensured from the second horizontal well under the first well. Second fluid is injected to the third well shifted to side from the first and second wells to displace fluids in the reservoir to the second well. At that HC production from the second well is continued. Hydraulic connection is ensured between the first, the second and the third wells. Pressure in the first well is increased using the second fluid injected to the third well. First well is closed when its pressure is increased by the second fluid to pressure sufficient to displace HCs from the second well during HCs production.

EFFECT: increased method efficiency.

29 cl, 10 dwg

FIELD: oil and gas industry.

SUBSTANCE: during execution of the thermoshaft method of high viscous oil production including vapour injection in the oil reservoir, and oil extraction via the production wells, according to the invention the lower layer of the oil reservoir is developed by several horizontal wells drilled from the drilling level of the oil reservoir, steam injection in the lower layer of the reservoirs via the underground system of steam supply, at that the horizontal wells are developed under steam cycle mode, and the underground steam supply system of the further horizontal wells are connected after development of the previous and switching of part of the horizontal wells to the production mode.

EFFECT: creation of the method of high viscous oil production ensuring increased extraction coefficient of the crude oil due to uniform heating of the oil reservoir through height at minimum heat losses per oil production.

3 dwg

FIELD: oil and gas industry.

SUBSTANCE: method involves installation of oil-well tubing string with well sucker-rod pump in a well. Additionally, the string features a liner with filter, heating cable along external surface from wellhead to the well sucker-rod pump, capillary well pipeline from wellhead to a depth below the well sucker-rod pump, entering inner space of the liner. Well operation involves simultaneous product extraction through oil-well tubing string by the well sucker-rod pump. Electric current runs over the heating cable. Mix of Intat asphaltene, resin and paraffin sediment solvent and Rekod demulsifier is injected via capillary well pipeline. Demulsifier to solvent ratio is (1:18)-(1:22). Cable with maximum heating temperature up to 105C and maximum power up to 60 kWh is used as the heating cable.

EFFECT: enhanced efficiency of viscous oil emulsion production.

1 ex, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: method of high-viscosity oil well development and operation involves landing of tubing string with well pump with power cable to the well, and landing of capillary tube parallel to the power cable and attached to external surface of the tubing string by clamps. Oil or oil-containing reservoir fluid is produced. Chemical reagent is injected to the well from a tank by a metering pump through the capillary tube. Power cable is inserted to the well through cable gland. Power cable and capillary tube are protected against direct contact with internal well surface by protectors. Electric heater with extension unit, well pump with power cable and sleeve with radial hole to which the capillary tube is connected are inserted into the tubing upwards from the bottom at the wellhead. Electric heater extension unit is connected to the power cable of well pump. The tubing is landed to the well so that its shoe is located at least 2 m lower than bottom of high-viscosity oil reservoir, and electric heater is facing perforation interval of the high-viscosity oil reservoir. At the wellhead, power cable is connected to well pump and electric heater control stations and inserted to the well through cable gland. Capillary tube is inserted to the well through sealed side tap of the well X-mas tree. Electric heater is actuated, and a process break is made for 8 hours to heat bottomhole zone of reservoir in the perforation interval and high-viscosity oil heating at the inlet of well pump. After the process break, well pump is launched simultaneously with the metering pump supplying high-viscosity oil flux via the capillary tube through the radial hole in the sleeve to inner space of the tubing above the well pump.

EFFECT: enhanced well yield, reduced load in the well pump.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: steam-gas generator for production of oil and gas condensate comprises a closed cabin with steam-gas generator mounted on the gate connected in series to adapter, tubing head, adapter and casing head of the injecting well at the deposit. Besides the generator comprises gas turbine with ejector and regenerator, piston-type compressor, electric board and electric generator coupled to gas turbine. At that the closed cabin with a door and lifting eyes comprises radiator and blower with electric motor in order to cool cooling fluid in combustion chamber of the steam-gas generator, supports with retractable rods for mounting at concrete base, water and fuel tanks placed at the cabin walls, gate couple at one side to piston-type compressor and on the other side to regenerator air duct, gas turbine placed at the cabin roof. The steam-gas generator comprises combustion chamber complete with a jacket for recirculation of cooling fluid in space between walls, with a cover and inlet valve for compressed air heated in the regenerator up to temperature of 600-700C, outlet valve for discharge of exhaust gas to ejector and gas turbine with outlet pipe connected to inlet pipe of the regenerator or to outlet valve with tube. At that the valve gear includes a cylinder with valve piston and spring having a channel for inlet under the valve piston of compressed air from receiver equipped with return valve coupled to the piston-type compressor. Cylinder has openings for discharge of combustion products into circular cylindrical channel with nozzles installed there for injection of water and generation of stream-gas mixture. The combined nozzle comprises a body with tubes to deliver electrically conducting fluid, which are connected to cylindrical channels placed inside the body in the layer of electrically insulating material in parallel to fuel nozzle; at one side of the tubes there are electrodes connected to pulse generator and on the other side there nozzles directed at angle towards each other and interconnected by blasting chamber of the nozzle with orifice. At that regenerator for compressed air heating is made with start-up fuel nozzle, blower and electric motor.

EFFECT: increased oil recovery of the deposit reservoirs.

6 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: inventions group refers to methods and systems for hydrocarbons, hydrogen and/or other products production from various underground formations. Method of underground formation heating is means that melted salt is injected in first channel of pipe-in-pipe heater at first place. At that the melted salt injection to the first channel includes the melted salt injection in the internal pipe of the pipe-in-pipe heater, and melted salt passes through the flow switch to re-direct the flow from the internal pipe to the ring are between the internal and external pipes. The melted salt passes through the pipe-in-pipe heater in the formation to the second place at distance from the first place, at that during the melted salt passage through the pipe-in-pipe heater the heat is transferred from the melted salt to the treated area. The melted salt is removed from the pipe-in-pipe heart at specified second place.

EFFECT: higher efficiency of formation heating.

21 cl, 1 tbl, 12 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention is related to oil and gas industries and may be used during development and operation of deposits in the area of permafrost formations. Device for thermal stabilisation at wellhead area includes an aggregate of heat stabilisers placed around the well and connected through the common collector in the upper part with a condenser. At that the lower part of heat stabilisers is also united by the common collector, and finned surface factor and the area of unfinned condenser surface are selected in order to meet performance of the specified mathematical expression.

EFFECT: provision of unconstrained operation and repair of the well at effective stabilisation of thermal state in the wellhead area in permafrost formations.

2 cl, 1 tbl, 2 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: set of inventions relates to extraction of products from underground beds. Proposed method of underground bed heating comprises heat feed from multiple heaters to one section of underground bed by heat carrier fluid circulation via at least one pipeline in at least one heater. Note here that a part of said pipeline of said heater can displace relative to well mouth with appropriate heater using at least one or more sliding seals in said well mouth to compensate for pipeline thermal expansion.

EFFECT: higher efficiency of bed heating.

19 cl, 1 tbl, 24 dwg

FIELD: mining.

SUBSTANCE: cooling fluid medium is fed through the annular space formed between the operational flow column and the final casing string communicating with the fluid medium with the collector. The cooling fluid medium is mixed with the fluid medium of the collector and the fluid media are obtained through the operational flow column. The temperature of the produced fluid media is regulated or reduced by heat exchanging with the cooling fluid medium fed through the annular space to prevent excessive heat dissipation into the geological layer.

EFFECT: improving the efficiency of thermal protection of the layer and controlling the temperature of the fluid media.

20 cl, 1 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention can be used at exploration of northern deposits and at control over heat-isolation capacity of well structure, contact of permafrost strata thawing halos at adjacent wells of developed deposit cluster. Thermal and physical conditions at wells are determined at two adjacent walls with subsiding permafrost strata that can cause problems at their thawing. Note here that thermometer instruments are arranged in every well behind the outer case strings for temperature measurement in well string space nearby permafrost stratum and at wellhead for fluid temperature registration inside every well at first and second time moments for every well. Said time moments are counted down from the start of well operation to start of permafrost stratum thawing there around. Measures temperatures and time of thawing start are introduced into expressions used to define the empirical factor dependent on stratum heat conductivity. Rime-variable radii of thawing zones and width of through thawed fracture are compared with their actual values measured at gas penetration to forecast the well conditions.

EFFECT: intensified oil production.

1 tbl, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention is related to submerged wellhead valves passing flow of hydrocarbons from an oil and/or gas well. The submerged wellhead valve has an inner channel for passing extracted hydrocarbons, an inlet port and an outlet port. The inlet and outlet ports are placed at the ends of the inlet and outlet channels respectively and intended for connection to the cooling fluid. At that the above inlet and outlet channels come to the above device to the area suitable for cooling of components heated by warm flow of hydrocarbons.

EFFECT: levelling down requirements to submerged wellhead equipment in regard to mechanical stability in combination with high temperatures resistance, thus excluding use of expensive components.

2 cl, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention is related to the field of oil and gas industry, mainly to production of viscous and superviscous oil, and it may be used for production stimulation of oil with viscous components and deposits. High-frequency impulse current is generated by a group HF surge-current generators in a group of twin-transmission power lines in a group of wells and consisting of two isolated conductors or one isolated conductor and used as the second metal conductor of pipelines in the group of wells. The impact is made by an electromagnetic high-frequency pulsed field generated by high-frequency impulse current of conductors in the groups of twin-transmission power lines to the metal surface of pipelines in the group of wells. Thermal and acoustic impact is made on intratubal liquid in the well group and through it on the oil deposit by heating and mechanical vibration of the pipeline metal which occurs at passage of high-frequency impulse current through the twin-transmission power line. Additional thermal and acoustic impact is made on intratubal liquid in the well group and through it on the oil deposit by heating and pressure fluctuations which occur at the end of the twin-transmission power line in result of high-frequency impulse charge through intratubal liquid. At that the HF surge-current generators are set so that they generate high-frequency current pulses with identical pulse length and repetition.

EFFECT: increase of oil production stimulation.

22 cl, 3 dwg

FIELD: physics, atomic power.

SUBSTANCE: invention relates to systems and methods of treating a subsurface formation. An in situ heat treatment system for extracting hydrocarbons from a subsurface formation comprises a self-regulating nuclear reactor; a system of pipes at least partly lying in the core of the self-regulating nuclear reactor with a first heat carrier which circulates through the system of pipes and a heat exchanger. The heat exchanger is designed to allow the first heat carrier to pass through it in order to heat a second heat carrier. The second heat carrier is designed to raise the temperature of at least part of the formation to a point higher than the temperature which enables to form a mobile fluid, light cracking and/or pyrolysis of hydrocarbon-containing material, resulting in formation, in the subsurface formation, of mobile fluids, fluids that are a result of light cracking and/or fluids that are a result of pyrolysis. The influx of heat into at least part of the formation over time at least approximately correlates with the decay rate of the self-regulating nuclear reactor.

EFFECT: high efficiency of formation heating.

19 cl, 8 dwg

FIELD: physics, atomic power.

SUBSTANCE: group of inventions relates to methods and systems for extracting hydrocarbons, hydrogen and/or other products from different subsurface formations. The in situ heat treatment system for extracting hydrocarbons from a subsurface formation comprises a self-regulating nuclear reactor, a pipe at least partly situated in the core of the self-regulating nuclear reactor, having a first heat-transfer medium which circulates through the pipe, and a heat exchanger through which said first heat-transfer medium flows and heats a second heat-transfer medium. The second heat-transfer medium is used to raise the temperature of at least part of the formation to a point higher than the temperature which facilitates fluid mobilisation, light cracking and/or pyrolysis of hydrocarbon-containing material in order to form mobile fluids, light cracking fluids and/or pyrolysis fluids in the formation. The self-regulating nuclear reactor is configured to regulate its temperature by controlling pressure of hydrogen fed into it. Said pressure is controlled based on formation conditions.

EFFECT: reduced amount of energy required to extract products from subsurface formations.

10 cl, 8 dwg

FIELD: mining industry.

SUBSTANCE: method includes mounting of packing element at lower limit of upper portion of thermo-isolated tubing pipe. Circulation pipe, performing a function of heat-exchange contour, with diesel fuel as heat carrier and following heat exhaust into atmosphere, is connected at whole length to upper portion of tubing string. Their lowering into well and support on the mouth is performed with displacement of tubing string axis relatively to well axis. Upper end of circulation pipe in summer period is connected to forcing line of heat-exchange plant, in winter period to forcing line of cooling plant. Forced circulation of diesel fuel is performed in upper portion of operation column through circulation pipes with following ascent along ring-shaped space. Mathematical formulae for calculating depth of packing element mounting, circulation pipe diameter, tubing string displacement value and diesel fuel flow are provided.

EFFECT: higher efficiency.

1 dwg

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