Assembly and method of gaseous hydrocarbons production

FIELD: mining.

SUBSTANCE: group of inventions relates to surveying underwater deposits of hydrocarbons and more specifically to an assembly and a method of underwater production of gaseous hydrocarbons. According to the method of gaseous hydrocarbons underwater production delivered is from a certain location on the sea surface at least one self-contained self-propelled drilling device to the sea bottom. Drilled from the sea bottom are multiple wells in a formation containing hydrocarbons. For this purpose at least one self-contained self-propelled drilling device is used. Herewith every well has a corresponding place of the well location on the sea bottom. Dome is installed over the multiple wells location places on the sea bottom. Determined is presence of hydrocarbon deposits near the self-contained self-propelled drilling devices by means of sensors installed on at least one self-contained self-propelled drilling device. Performed is sublimation of the hydrocarbons deposits using a sublimation mechanism mounted on at least one self-contained self-propelled drilling device. As the result gaseous hydrocarbons are separated from the formation containing hydrocarbons. Performed is collection of the released gaseous hydrocarbons by the dome.

EFFECT: increasing the production efficiency.

20 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: well formation development device includes tubing string with a packer installed above the formation and filter blinded from bellow for the purpose of communication with the formation, a bit with a row of holes. The filter is equipped with nozzle on top, with inner cylindrical cavity. The bit is inserted from top to the nozzle from which it is supported by the spring upwards. From bellow the tip is equipped with a saddle and a ball mounted on the saddle. The packer is made as an inflated rubber element with hydraulic chamber connected by axial channel made in the nozzle with its inner cylindrical cavity. At that in initial position the row of bit holes is placed opposite inner cylindrical cavity of the nozzle and communicated to inner surface of the tubing string. At that a hollow body rigidly fixed to the tubing string from the top is installed telescopically at the bit top. The hollow body is fixed in regards to the bit in initial position by a shear tie and in operating position the bit may be moved axially in limited way in regard to the hollow body and nozzle, compression of the spring, fixation of the hollow bit in regard to the nozzle, sealed cut-off of the row of bit holes at the inner head of the nozzle. At that the tubing string above the hollow body is equipped with sucker rod pump.

EFFECT: improved quality of the operation device, improved reliability of sealing.

2 dwg

FIELD: oil and gas industry.

SUBSTANCE: method includes uptake of oil via production wells, pumping of a working fluid via injection wells, hydraulic fracture of a bed in the injection and production wells. A pool area is identified with the low bed pressure and the injection well with low injection capacity. Hydraulic fracture is carried out in the identified injection well. Development is carried out to increase the bed and bottom hole pressure in reacting production wells. Hydraulic fracturing is carried out in the production wells in series from a well with the lowest increase of the bed and bottom hole pressure to a well with the highest increase of the bed and bottom hole pressure. At the same time in the wells with a reservoir with high permeability they carry out a sparing hydraulic fracture, and in the wells with the low permeable clayey reservoir they carry out intense hydraulic fracture with the maximum length of the crack.

EFFECT: increased efficiency of the bed hydraulic fracture.

FIELD: oil and gas industry.

SUBSTANCE: device includes a housing, a branch pipe with a central duct, openings and an nut, which is concentrically located in the housing, and a spring. The nut is installed on an outer surface of the branch pipe in its part, and the spring is installed between the nut and the housing, in which there is an internal cylindrical recess. In the lower part of the internal cylindrical recess of the housing there are radial ducts. A hollow cylindrical valve provided with an annular projection from above is rigidly attached from below to the branch pipe inserted into the housing with a possibility of restricted leak-proof downward movement of the internal cylindrical recess of the housing. The cavity of the internal cylindrical recess of the housing above the annular projection of the cylindrical valve is interconnected with openings to the central duct, and the cavity of the internal cylindrical recess under the projection is interconnected with radial ducts to the space outside the housing. There is also a replaceable sleeve and a check valve passing in an upward direction. According to the invention, the hollow cylindrical valve below the internal cylindrical recess of the housing is provided with radial openings. Below the radial openings, the cylindrical valve is provided with a replaceable sleeve with through openings from above. A blind rod is installed into the replaceable sleeve and provided from above with a radial through hole, into which a pin is installed, which is inserted in the radial openings of the hollow cylindrical valve and rigidly fixed in the housing. The blind rod has a possibility of restricted back-and-forth axial movements together with the housing relative to the replaceable sleeve with the hollow cylindrical valve with a possibility of cyclic opening and closing of through holes of the replaceable sleeve during pumping of liquid to the device.

EFFECT: possibility of increasing liquid flow rate at pulse pumping to a formation in a formation pressure maintenance system during development of oil deposits.

2 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas production industry and, in particular, to field development by means of water and gas injection into injection wells and withdrawal of oil through production wells. The method includes the preparation of the water-gas mixture within the range of gas content values, ensuring the operational stability of the pumping unit, injection of the mixture into one or more wells using the unit with a centrifugal pump and displacement of oil from the formation with the tank pressure maintaining system. Meanwhile before injection of the water-gas mixture into the formation, the correlation of oil displacement coefficient with the gas content in the water-gas mixture at formation conditions is determined. On the basis of the obtained correlation the optimum value of the gas content is selected. In the well itself the correlation between the injection capacity and the gas content is determined. The working relation of water and gas discharge values upstream the mixer is identified. Further, with the advancing of displacement front located between injection and production wells, the current value of the gas content at the displacement front is calculated with the pressure correlation. After that the gas content in the water-gas mixture is decreased, maintaining it at the optimum level.

EFFECT: simplification of technology with simultaneous decrease of expenses for its implementation due to more thorough consideration of the factors influencing the efficiency of oil recovery increase measures.

1 ex, 1 dwg

Pig // 2540728

FIELD: machine building.

SUBSTANCE: pig has casing with central internal channel, through top and bottom side holes and check valve. This valve is equipped with central top stock, internal spring-loaded safety valve and through vertical holes in top end wall. Casing contains two coaxial bushings, top and bottom, and support section installed on the stock with possibility of rotation. At acute inclination angle to the central axis of the casing a between bushings ring clearance is made. Its peripheral edges are located on side surfaces of bushings. Top bushing is made with through inclined holes. They are connected with the clearance with possibility of creation of the hydraulic seal between the pig casing and pipe string during the pig movement. Bottom bushing is made with through side holes in top part. Facets of the ring clearance, top base of top bushing, cylindrical surface of each inclined hole of the top bushing are made interfaced. Besides, check valve installed in the support section with possibility of vertical movement is equipped by side contracting nozzles. They coincide with side through windows of the support section.

EFFECT: increased reliability of work and extension of process abilities of the pig.

2 cl, 3 dwg

FIELD: oil and gas industry.

SUBSTANCE: group of inventions is related to oil industry, and namely to pulse hydraulic hammer treatment of the bottomhole formation area, and well development. Essence of inventions: method includes stratum shutoff by a ring packer, pressure treatment of the bottomhole formation area by cyclic pulses of repression and depression pressure to the bottomhole formation area with pumping out of formation fluid. In order to create repression and depression pressure pulses the below-packer space is separated from the over-packer space. The time is provided for alignment of below-packer pressure with over-packer pressure. Pressure in the over-packer area without injection of working fluid from the surface is made higher for the purpose of direct hydroram or lower than the formation pressure for the purpose of return hydroram. The below-packer space is united with tubing string or below-packer space is united with over-packer space for the purpose of direct or return hydroram. Potential separation or interconnection of the below-packer space with over-packer space or with tubing string is ensured by use of a downhole assembly with a shell, a saddle installed on it and a ring packer, a piston with cross tee, which is moved in the shell by means of the tubing string and potential piston inlet/outlet from the well, a controlled piston valve at the lower butt end of the tubing string interacting with the shell saddle for the purpose of its opening and closing when the tubing string is moved with the piston.

EFFECT: improving efficiency and processability of the method and device due to increase in power and selectivity of hydraulic impact on the bottomhole formation area at simultaneous simplification of the device and method.

5 cl, 5 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention can be used for pulse injection of fluid into bed. Proposed device comprises case, concentric pipe with central channel arranged therein, openings, nuts and spring. Said nut is fitted on pipe outer surface at its top while spring if arranged between nut and case with inner cylindrical recess. Radial channel are made in lower part of the case cylindrical recess. Note here that hollow cylindrical valve equipped with circular ledge is fitted rigidly to the pipe fitted in the case to perform limited sealed displacement downward relative to inner cylindrical recess of the case. Case cylindrical recess above cylindrical valve circular ledge communicates via openings with central channel while inner cylindrical recess cavity above said ledge communicates via radial channels with the space outside the case. Besides, it has replaceable bush and stiff centring skid with stripping valve arranged atop said pipe. In compliance with this invention, hollow cylindrical valve below the case cylindrical recess is equipped with radial openings. Radial holes tightly stopped from inside by replaceable bush are arranged below radial openings in hollow cylindrical valve. From top, said replaceable bush is connected with the case by rod fitted in radial holes of said valve. Note here that hollow cylindrical valve is plugged from bottom while said case can perform restricted axial reciprocation along with replaceable bush relative to said valve at forcing the fluid in this device.

EFFECT: higher fluid flow rate at pulsed injection.

1 dwg

FIELD: mining.

SUBSTANCE: group of inventions relates to mining and can be used to influence the stagnant zone of strata intervals. The method comprises multiple creation of pulse of terrastatic pressure by injecting working fluid with predetermined parameters in the injection wellbore, the implementation of registering and control of wellbore parameters or time during the process of operation of the injection wellbore. At that the registration and control of wellbore parameters or time is carried out by controller or computer. The injection of the working fluid is carried out with the ability to maintain the terrastatic pressure at a given stable level of daily or monthly injection volumes. Periodic change of mode of injection of the working fluid in the injection wellbore is carried out by the control signal from the process controller or computer to the drive of the locking-bypass device at mismatch of the wellbore parameters with the given wellbore parameters or with the given time intervals, changing the pressure and/or volume of injection.

EFFECT: increase of the intensity of drainage and mining of oil deposit, as well as reduction of irrationally used (inefficient) injection volumes to maintain the terrastatic pressure.

11 cl, 1 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: proposed method comprises construction of horizontal wells and their isolation to horizontal section and vertical wells with face below seam bottom with extraction of product from vertical well. Proposed method consists in that vertical wells are infill drilled for geological research to define formation properties, oil properties and formation critical pressure. Set of wells arranged around the perimeter of developed section is selected. Similar horizontal wells are drilled from vertical wells of this set and directed clockwise or counter clockwise toward near well of said set to surround this well and its horizontal shaft. Distance between shafts foes not exceed tem meters to provide for hydrodynamic communication. Seam local hydraulic fracture is made in the case of its absence. Every vertical well is equipped with the pump lowered on pipe string below stratum surface and point of communication with appropriate horizontal wells to compose tube space. Extraction of products is effected with decrease in seam hydrodynamic level not lower than critical pressure and with gas extraction from tube space at the mouth with vacuum pump.

EFFECT: higher yield.

1 ex, 2 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: proposed method comprises forcing working fluid via short pipe of string to top seam and working fluid via long pipe tubing equipped packer to bottom seam. Going-in of downhole instruments or inserted pipe via control head and long pipe string. Well is analysed by downhole surveying instruments. Technological jobs are performed with the help of inserted pipe. Downhole instruments are lowered in well via control head and long pipe string, forcing working agent via long pipe string is maintained under operating conditions while forcing via short pipe string is continued or terminated. In making technological jobs, inserted pipe is lowered in well via control head and long pipe string to stop forcing via long pipe string.

EFFECT: geophysical survey or technological jobs with lifting pipe string.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: group of inventions relates to oil producing industry and intended for improvement of oil recovery of productive formations. The method of excitement of wave field on the injection well face consists in that the flat constrained flow of liquid is supplied continuously from the slot-hole nozzle to the wedge nose. Meanwhile the area of primary generation of vortex structures in the zone behind the nozzle cut edge is formed. Periodic breakdown of ring vortex structures from the nozzle cut edge, their movement with flow and impact with the wedge nose are provided. Pressure disturbances are generated at deformation and destruction of vortex structures on the wedge nose. Propagation of periodic pressure disturbances from the wedge nose extensively in the form of elastic waves and their chaotic reflection from surrounding walls is performed. The excitation by energy of multiple vortex structures due to energy of elastic oscillations achieving primary generation area is conducted. The liquid flow on the wedge nose is deflected to one of two diverging outlet channels. The flow is divided at the inlet upstream the output channel and sent partially to the lateral chamber interfaced with the nozzle edge and the output channel. In the chamber the pressure is increased due to piston effect of the supplied flow and the flow is pushed away to the opposite output channel, formed from two of its sides by the pressure difference. Periodic switching of the liquid flow direction between output channels is provided. The liquid is displaced alternately from the diverging channels into the common punched output collector. The field of elastic oscillations is excite on the injection well face. Thus the elastic waves reflected from walls of each chamber are focused on the nozzle cut edge interfaced to it.

EFFECT: improvement of efficiency of conversion of kinetic energy of the flow to oscillatory energy of the wave field.

2 cl, 1 dwg

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