Method of powder pressure generator application

FIELD: oil and gas industry.

SUBSTANCE: invention is related to oil and gas industry, and namely to powder pressure generators and may be used to simulate oil and gas production. The concept of the invention is as follows: according to the method to the pre-killed well a flow string is run in with a loading hopper at the end. The loading hopper is made as a pipe section with inner cone, which least diameter is equal to inner diameter of the flow string and the largest diameter is less than minimum full bore. The packer is set and activates above the productive stratum and the loading hopper. Christmas tree gate valve is closed; a lubricator with powder pressure generator is installed above the gate valve. A logging cable is passed through a stuffing box installed above the lubricator. Thereafter the pressure-balancing valve is closed and the gate valve is open. Afterwards the powder pressure generator is run in to the well at the logging cable below the loading hopper to the interval of the productive stratum. Voltage is supplied through the logging cable to glowing filaments set in powder charges. Powder charges are ignited thus ensuring mechanical, thermal, physical and chemical impact on the productive stratum. Time delay is held upon treatment of the productive stratum. Then unburnt parts of the powder pressure generator are lifted at the logging cable through the loading hopper to the lubricator, the gate valve is closed, the pressure-balancing valve is open. Inside the lubricator pressure is balanced to the atmospheric pressure and then the lubricator is disconnected. At that the loading hopper is designed to protect the packer during powder charges burning, and the time delay upon treatment of the productive stratum shall be not less than five minutes.

EFFECT: increased efficiency of impact on the productive strata and blowout prevention of the produced product from the well.

3 dwg

 

The invention relates to the oil and gas industry, and specifically to gunpowder to the pressure generator, and can be used for enhanced recovery of oil and gas caused by mechanical, thermal and physico-chemical effects on oil and gas reservoirs products of combustion of solid fuel.

Known powder channel generator pressure RF patent for the invention №2460877. The invention relates to the oil and gas industry, and specifically to gunpowder to the pressure generator, and can be used for enhanced recovery of oil and gas caused by mechanical, thermal and physico-chemical effects on oil and gas reservoirs products of combustion of solid fuels. The powder channel pressure generator, the descent into the well on a logging cable, consists of powder charges made in the form of cylinders with a Central channel and with holes in the side surface of the powder charge, connected between the lid and tray cable. In the upper and lower powder charges installed spiral filament, electrically connected to the logging cable. Holes in the side surface of the powder charge is made to tilt in the direction of the logging cable, and the angle between the Central axis of the propellant charge and the axle holes in the side surface of the powder ZAR is Yes is less than 90°. The efficiency impact on oil and gas reservoirs products of combustion of solid fuels, improving the accuracy of installation of the device in the selected interval, preventing displacement of the powder generator pressure after turning it on. The disadvantage of the powder channel generator pressure is low, the impact on oil and gas reservoirs products of combustion of solid fuel.

Known powder pressure generator for RF patent for useful model №118350. Powder generator pressure, lowered into the well on a logging cable and consists of a separate propellant charges made in the form of cylinders connected between the top cover and tray cable. In the upper and lower powder charges installed spiral filament, electrically connected to the logging cable. The composition of the powder charges included high-energy composite material, and the number of high composite material in individual powder charges differently. Individual powder charges in powder generator pressure can be placed so that the number of high composite material in the upper and lower powder charge was the same and was reduced to its middle. Individual powder charges in porogo the th generator pressure can be positioned to the number of high composite material in the upper charge was maximum and decreased towards the bottom of the charge. As high-energy composite material is a powder of nano-sized aluminum. The number of high composite material in individual powder charges is not more than 40% of the total mass of the powder charge. The number of high composite material in individual powder charges, which are located one behind the other, may be different on 2...15%. The disadvantage of the powder generator pressure is low, the impact on the reservoir, possible ejection from a well produced product, the rapid reduction in pressure in the processing interval.

Known powder pressure generator for RF patent for useful model №111189. Powder generator pressure is lowered into the well on a logging cable and consists of powder charges made in the form of cylinders connected by a top cover and tray cable. In the upper and lower powder charges installed spiral filament, electrically connected to the logging cable. Powder charges are made with one or more blind cavities filled with high-energy composite material. As Vysokoe ereticheskoe composite material is a powder of nano-sized aluminum. Blind cavity after filling high-energy composite material can be closed tubes of glue. Blind cavity can be closed by a common cover, preventing the eruption of high-energy composite material. Cover that covers the blind cavity, can be glued. Each blind cavity is closed by a separate cover. Each cover that covers the blind cavity, can be glued. The cover can be made of the same material as the powder charge. Blind cavity can be made circular. Blind cavity can be made round. Blind cavity can be made non-round shape, such as oval, triangular, rectangular or a combination. The disadvantage of the powder generator pressure is low, the impact on the reservoir, possible ejection from a well produced product, the rapid reduction in pressure in the processing interval.

The famous "Gunpowder generator pressure facing" for hull jet guns and an implosion device, the RF application for the invention №2009115084 made in the form of a set of fragments to be fixed to the housing of the device sequentially one after another in a single tube facing the charge. Its fragments can be collected from the core elementology profile ballistic artillery gunpowder. Fragments of gunpowder generator pressure facing can be made in the form of homogeneous structures in the shape of a tube by gluing the ends of the powder elements of the cold-curing polymer or in the form of flexible plates by binding the powder elements nitrocellulose or cotton tape. The disadvantage of the powder generator pressure facing is the low efficiency of stimulation, a rapid decrease in the pressure in the processing interval.

It is known Device for perforating wells and fracturing in the reservoir" RF patent for the invention №2170339. The invention relates to the oil and gas industry and, in particular, to cumulative guns and powder to the pressure generator used in wells. Provides increased efficiency perforator and sizes of channels in the columns and create additional fractures in the borehole adjoining area. The inventive device has connected to a cable-rope for the descent into the well shaped punch with explosive substances. It forms the detonation of a cumulative jet. There is a powder pressure generator with solid elements. Solid elements powder generator pressure is located between the shaped charge explosives or near sarado the explosives, contact with them. Solid elements can be located at the bottom of the device instead of the cargo or part of this burden. When this solid elements do not intersect the axis of cumulative jets and made of non-plated ballistic or composite solid rocket fuel in the form of a cylinder with a Central circular channel in which the length and diameter of the Central channel connected by the relation (20...40):1. The content of the filler-stabilizer burning to the mass of the solid fuel element is less than 1.5%. In other embodiments, the device length and the diameter of the Central channel associated in other relations. In addition, in other embodiments, provides a different filler contents-stabilizer burning to the mass of the solid fuel element. In other embodiments, the above and other placement of the device components and their implementation. The disadvantage of this device for perforating wells and fracturing in the reservoir is low, the impact on oil and gas reservoirs products of combustion of solid fuel.

Known "Method of perforation and treatment of bottom-hole zone of the well and the device for its implementation" RF patent for the invention №2162514. Usage: in the operation of oil wells. Provides for a single run, lifting equipment, drilling wells, treatment clicks nativeimage layer from clogging elements, and formed perforations in the reservoir - from crust baking and implementation of fracturing. The essence of the invention: method and device for its implementation include perforation of the well painted with a cumulative punch and implosive effect directly at the end of the perforation of the well for cleaning is formed perforations of the crust from baking with implosion chamber, an internal cavity which is connected with the inner cavity of the punch. After this triggered thermogenerator connected to the punch connecting node, which has a lattice plugged the holes. Hot gases of thermogenerator enter the body punch and through the holes in the Cabinet for shaped charges on pre-formed perforation channels act directly on the perforation tunnels in the reservoir. Choose the characteristics of the charge, the design of the device and working conditions so as to ensure that the fracture pressure. To assess the nature of the impact and operation of the device it is equipped with temperature sensors and pressure, and to determine the location of the instrument in the well - locator. The disadvantage of this device is low, the impact on oil and gas bearing formations about which of aktov combustion of solid fuels.

Known "Device for opening and gas-dynamic layer processing" RF patent for the invention №194151. The invention relates to techniques for perforating operations in wells and can be used for secondary opening wellbore zone. Provides the ability to create additional energy source that can form when firing shaped charges in a borehole powerful stream of gas moving at a cumulative jet. The inventive device includes a hull shaped punch head with sealed side holes, shaped charges, tip and two sealed air chamber with atmospheric pressure. They are located at the ends of the perforator. In aerial cameras placed powder charges. Between them and shaped charges placed protective pieces of nematodirosis mixed fuel elasticdog type. The disadvantage of this device is low, the impact on oil and gas reservoirs products of combustion of solid fuel.

The famous "gas Generator solid fuel for processing of oil and gas wells" RF patent for the invention №2311529. The invention relates to the oil and gas industry and can be used to stimulate critical area of oil and gas reservoir tonotopy the governmental charge - the generators. Provides improved reliability and efficiency of the device, and achieve a higher production rate of oil, gas condensate and gas in wells of any orientation. The inventive device includes a tubular cylindrical charges, providing vibration mode burning, igniter charge and carrying geophysical cable with fastening elements of the design. According to the invention when processing a high-angle, deviated wells and horizontal wells geophysical cable is located inside the flexible continuous tube, repeating direction well, has conductive wires for connecting the wires to the originating node igniter charge. When this continuous flexible tube connected to the protective casing - sheath around a charge in the form of a perforated or non-perforated metal tubing, or made of fiberglass, with features providing a tightening of charges close to each other and with her. A tubular cylindrical charges have a length of channels and different diameters of these channels to provide high-frequency and low-frequency pressure pulses in the combustion of these charges. The lack of a gasifier for solid fuel processing of oil and gas wells is the low efficiency of influence is the major reservoir, possible ejection from a well produced product, the rapid reduction in pressure in the processing interval.

Known powder generator on RF patent for useful model №108796. Powder generator is lowered into the well on a logging cable and consists of powder charges made in the form of cylinders connected between the lid and tray cable, in the upper and lower powder charges installed spiral filament, electrically connected to the logging cable. Between the logging cable and spiral filament is an additional cable, one side of which is connected to the coils of the filament, and the other is connected through the connector logging cable, and the cable is also attached to the connector from the side of the powder charges. From the geophysical cable connector made in the form of a tip, and from the powder charges in the form of the head of the downhole tool. The connector is made to prevent inadvertent disengagement of mechanical fastening, for example, in the form of a cap nut. Before spirals bulbs installed connectors spiral filament. The connectors of the spiral filament is made with preventing spontaneous separation of mechanical fastening. Additional cable attached to the cable. Additional cable can be attached to the rope XOM is Tami. The disadvantage of the powder of the generator is low, the impact on the reservoir, possible ejection from a well produced product, the rapid reduction in pressure in the processing interval.

Known powder pressure generator for RF patent for useful model №108795. Powder generator pressure is lowered into the well on a logging cable and consists of powder charges collected between the lid and the tray. In the upper and lower powder charges installed spiral filament, electrically connected to the logging cable, and all powder charges are connected by cable. The cable connecting the individual powder charges, is located in a groove made along the lateral surface of the propellant charge. On the one hand the powder charge at the end of the ledge, and on the other hand - basin, and powder charges partially into each other. The depth of the groove on the lateral surface of the powder charge is greater than or equal to the diameter of the cable connecting the individual powder charges. The width of the groove on the lateral surface of the powder charge is larger than the diameter of the cable connecting the individual powder charges. The groove can be made with radius. The groove may be made rectangular. The protrusions and depressions on the ends of the propellant charge for their radial fixation relative to each other is made curly. Weeks the STATCOM powder generator pressure is low, the impact on the reservoir, possible ejection from a well produced product, the rapid reduction in pressure in the processing interval.

Known powder generator and a method for its use by the RF patent for the invention №2460873 (prototype). Group of inventions relates to the oil and gas industry, specifically to gunpowder to the pressure generator, and can be used for enhanced recovery of oil and gas caused by mechanical, thermal and physico-chemical effects on oil and gas reservoirs products of combustion of solid fuels. Improves the efficiency of stimulation, increasing the pressure on this layer in the processing interval, preventing blowout of the extracted product. The essence of inventions: gunpowder generator consists of powder charges connected between the lid and tray cable. At least one powder charge contains a spiral filament, electrically connected with the logging cable. According to the invention is higher powder charges on the logging cable set top packer, made in the form of elastic shells with gunpowder charge of the upper packer, the electric coil of the upper packer and additional powder charge with detonator of the upper packer. Lower powder charges a lower packer, made in the form of elastic shells with gunpowder is a long lower packer, electric spiral filament of the lower packer and the additional charge with detonator of the lower packer. The thickness of the wire and the material of the filament of the upper and lower packers are executed in the same, but different from the spiral filament powder charge. The method according to the invention lies in the use of the above powder generator pressure. The disadvantage of the powder of the generator is the complexity of its design, low impact on the reservoir and the inability to retrieve the unburned parts of the powder of the generator to the surface.

Objectives of the invention are: enhancing the impact of oil and gas reservoirs products of combustion of solid fuels, increasing the pressure on the layer in the processing interval, preventing blowout of the extracted product, removing from the well the unburned parts of the powder generator pressure.

These tasks are achieved due to the fact that the method of applying the powder generator pressure includes burning in the productive interval of the formation of powder charges. In pre-plugged the hole down the string of tubing to which the underside of the thread attach the receiving funnel, made in the form of a segment of pipe with an inner cone, the smaller the diameter of the cat is, which is equal to the inner diameter of tubing, and more less than the minimum bore of the well. Over the admissions funnel above the productive formation install and activate the packer. Tubular valve wellhead valve closed, install the pipe above the valve lubricator with powder generator pressure while logging cable is passed through the stuffing box device installed above the lubricator. Close the valve of the pressure balance. Open pipe valve, then put the powder generator pressure on the logging cable below the hopper in the productive interval of the formation wells. On the spiral filament installed in the powder charges, geophysical cable serves voltage. Powder charges are ignited, the burning in the well followed by mechanical, thermal and physico-chemical effects on the producing formation. After processing of the productive formation make a temporary shutter speed, then logging cable unburned part of the propellant generator pressure through the receiving hopper raise in the lubricator. Block pipe valve. Open the valve on the equalization of pressure within the lubricator pressure is equalized to atmospheric, and disconnect the lubricator. Temporary exposure after processing of the productive formation is not less than five minutes.

Held p is a competent research has shown, that the proposed solution has novelty, industrial applicability and inventive step, i.e., satisfy all the criteria of the invention. Inventive step is confirmed by the fact that the new set of essential features provides getting a new technical result.

The invention is illustrated in Fig.1...3, where:

in Fig.1 shows the powder generator pressure in the lubricator before descending into the well,

in Fig.2 - powder generator pressure is lowered in the interval of the reservoir,

in Fig.3 - powder generator pressure at work, termoizoliacia processing and gap productive formation during combustion of the powder charge.

The method of applying the powder generator pressure 1 includes burning in the productive interval of the formation 2 propellant charges 3. In pre-plugged the hole 4 down the column tubing 5, which is on the bottom of the thread (not shown) attach the receiving hopper 6, is made in the form of a segment of pipe with internal cone 7, the smaller the diameter "d" equal to the inner diameter of tubing "dt"and the larger "D" is less than the minimum bore wells "dSLE". Over the admissions funnel 6 above the productive formation 2 install and activate the packer 8. Tubular valve 9 fountain the second valve is closed. Install pipe above the valve 9 lubricator 10 to the power generator pressure 1. While logging cable 11 is passed through the sealing device 12 installed above the lubricator 10. Close the valve pressure equalization 13. Open tubular valve 9, and then put the powder pressure generator 1 on the logging cable 11 below the hopper 6 into the productive interval of the formation 2 wells 4. On the spiral filament 14 installed in the powder charge 3, through logging cable 11 serves voltage. Powder charges 3 ignite, burning in the borehole 4 is accompanied by mechanical, thermal and physico-chemical effects on the reservoir 2. After processing of the productive layer 2, make a temporary shutter speed, then logging cable 11 unburned part of the propellant generator pressure 1 through the receiving hopper 6 raise the lubricator 10. Overlapping the tubular valve 9 open valve pressure equalization 13, inside the lubricator 10 the pressure is equalized to atmospheric, and disconnect the lubricator 10. Temporary exposure after processing of the productive layer 2 is not less than five minutes. The overlap interval of the well from the top allows you to create greater local pressure and more effective influence on the formation increases when the OK oil and gas wells. Loading hopper 6 prevents the packer during the combustion of the powder charge 3, and after processing layer provides rise to the surface of the unburned parts of the powder generator pressure 1.

The application of the invention allowed:

1. To increase the effectiveness of oil and gas reservoirs products of combustion of solid fuel.

2. To increase the pressure on the reservoir in the processing interval.

3. To prevent blowout of the extracted product.

4. To prevent clogging of the channels in the rock cuttings that are on the bottom of a well.

5. To increase or restore throughput properties adjacent to the borehole rocks.

6. To ensure termoliticheskogo processing and gap-bearing formations.

7. Extract from a well unburned part of the propellant generator pressure.

The method of applying the powder generator pressure, including burning in the productive interval of the formation of powder charges, characterized in that previously plugged well down the string of tubing to which the underside of the thread attach the receiving funnel, made in the form of a segment of pipe with an inner cone, the smaller the diameter of which is equal to the inner diameter of tubing, and more - is less than the minimum bore of the well above the receiving hopper above about aktivnogo formation install and activate the packer, tubular valve wellhead valve closed, install the pipe above the valve lubricator with powder generator pressure while logging cable is passed through the stuffing box device installed above the reservoir, close the valve pressure equalization, open tubular latch, then put the powder generator pressure on the logging cable below the hopper in the productive interval of the formation wells in the spiral filament installed in the powder charges, geophysical cable serves voltage, powder charges ignite, provide mechanical, thermal and physico-chemical effects on the reservoir, after processing of the productive formation make a temporary shutter speed, then on geophysical the cable unburned part of the propellant generator pressure through the receiving hopper raise in the lubricator, overlapping the tubular valve, open the valve on the equalization of pressure within the lubricator pressure equalize with atmospheric and disconnect the lubricator, while the receiving funnel comply with the protection capability of the packer during combustion of the propellant charges, and temporary exposure after processing of the productive layer shall not be less than five minutes.



 

Same patents:

FIELD: oil-and-gas industry.

SUBSTANCE: proposed method comprises construction of pairs of horizontal production wells and injection wells arranged one above the other, and vertical observation wells. Heat carrier is injected via injection wells with heating of productive bed and creation of steam chamber. Product is extracted by steam-gravity drainage via production wells, steam chamber conditions being monitored. Note here that thick oil deposit is worked with adjustment of current size of steam chamber by changing of heat carrier injection volume and extraction of fluid from production wells. Observation wells are exposed below the lowest production horizontal well by at least 0.5 m but above the level of water-oil contact by 0.5-1 m. Additionally, well is drilled between adjacent pairs of horizontal wells. In case the area of steam chamber extension of productive bed is smaller than distance between pairs of production and injection wells, extra horizontal well is drilled. in case it is larger, vertical well is drilled. Note here that extra wells are exposed below the lower horizontal production well by at least 0.5 m but not lower than water-oil contact by over 0.5 m. Extra wells are heated by heat carrier to create thermal hydrodynamic communication with adjacent horizontal wells for symmetric and uniform extension of steam chamber around pairs of horizontal wells. Superheated steam or steam with hydrocarbon solvent or steam with inert gas is used as heat carrier.

EFFECT: higher yield, lower costs of bed heating.

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FIELD: oil and gas industry.

SUBSTANCE: invention is related to development of superviscous oil deposit using heat for heating of the productive formation. The concept of the invention is as follows: the method includes drilling of a pair of the upper injector and lower producer, which horizontal sections are located in parallel over each other in the vertical plane, heating of the formation by steam injection to the both wells with formation of a steam chamber, heating of the formation intermediate zone, reducing viscosity of superviscous oil, injecting steam to the upper horizontal injector and selecting product from the lower horizontal producer. According to the invention the formation is heated by steam injection to both wells until the value of steam and oil ratio is stabilised. Hereupon three modes of development are used in sequence for the superviscous oil deposit. The first mode includes steam injection to the injector and withhold in the formation during 48-72 hours. The second mode includes injection of propyleneglycol to the producer on the basis of 5 m3 per 100 m of the producer horizontal well with content of the base material equal to at least 98% with withhold in the formation during 12-24 hours and simultaneous circulation of water steam in the injector. The third mode includes production of superviscous oil from the producer until the values of steam and oil ratio increases in 1.5 times.

EFFECT: increasing efficiency in development of superviscous oil deposit due permeability improvement of superviscous oil in the formation area close to the producer horizontal bore as well as reducing power consumption for implementation of the method.

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FIELD: oil and gas industry.

SUBSTANCE: method includes delivery of saturated or superheated steam at initial pressure to a tubing string inserted to the well in the oil-filled formation, measurement of steam temperature in time at the output from the tubing string with subsequent determination of the value of heat flow from the well to the formation in time and calculation of optimal steam consumption in time upon achievement of steam weight fraction at the output from annular space different from zero. Thus heat flow is compensated from the well to the formation by thermal energy released by steam in result of phase change. The current steam consumption is reduced up to the optimal value by reducing the initial pressure up to the value, at which steam temperature at the output from the tubing string remains permanent.

EFFECT: improving efficiency of the method due to reduction of capital costs and power consumption for its implementation.

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FIELD: oil and gas industry.

SUBSTANCE: invention is related to hydrocarbons extraction from reservoir. The method of hydrocarbons extraction from reservoir contains the stages which ensure availability of the plant comprising: an injector equipped with two casing strings for steam injection, and each string comprises a steam injection valve, a producers equipped with at least one casing string for hydrocarbons extraction, a group of measurements sensors that includes at least flow sensors or pressure sensors located at the surface in the areas of location of the above steam injection valves in the injector, at least one pump for hydrocarbons extraction placed in the producer, the plant operation control and monitoring device; steam is injected to the injector; hydrocarbons are extracted by means of the pump in the producer; pumping rate is based on the difference between temperature at the pump input and evaporation temperature calculated on the basis of pressure measured at the pump input; a group of parameters is maintained within the range of preset limit values by adjustment of the pump rotation frequency in the producer and/or adjustment of injected steam flow rate in the injector; the measured flow rates are compared with minimum parameterized flow rate values; alarm signal is sent and/or the plant is switched off when the measured values are below the parameterized values.

EFFECT: increasing hydrocarbon extraction efficiency.

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FIELD: oil-and-gas industry.

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EFFECT: higher efficiency of bed heating.

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SUBSTANCE: proposed method comprises making the production gallery in productive oil bed and under it, drilling underground gently dipping and/or horizontal injection and production wells fro productive gallery, steam injection from surface steam feed wells via injection wells and extraction of formation fluid via production wells. In compliance with this invention, one injection well and one production well are combined into pair to make separate drain-injection element. Drilling part of injection and production wells in every drain-injection element is laid with allowance for arrangement of well bottoms in section outline nearby each other to their intersection to make zone of bottoms converging. Note here that in plan of injection paths of two adjacent drain-injection elements are located between production wells while mouths of every pair of injection and production wells of adjacent drain-injection elements make the zone of mouths convergence. Note here that drain-injection elements are distributed uniformly over the entire area of the section in one or several tiers subject to bed depth.

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FIELD: oil-and-gas industry.

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EFFECT: higher efficiency.

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FIELD: oil-and-gas industry.

SUBSTANCE: proposed method comprises drilling of heat-injection wells, injection of heat carrier into bed, drilling of vertical drain-extract well at the deposit center, dewatering and drying of bed and product extraction therefrom. Note here that heat-injection two-mouth wells are drilled of horizontal-circular profile in radius equal to that of isometric deposit. Drilling is performed by coiled-tubing process (flexible tube) with using of flexible tube as well casing. Said flexible tube is not cemented. Flexible tube is perforated toward deposit center and to vertical drain-extract well.

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FIELD: oil and gas industry.

SUBSTANCE: method includes drilling of pairs of horizontal wells in superviscous oil deposit in order to perform steam assisted gravity drainage and drilling of viscous or high-viscous oil deposits located downstream in the structure plan, drilling of horizontal producers, steam injection to injectors for steam assisted gravity drainage and injection of hot water to injectors at viscous or high-viscous oil deposits, product extraction from the producers, separation of oil and water at the well head and reuse of this water. At viscous or high-viscous oil deposits vertical and horizontal producers and vertical and/or directional wells are drilled as outpost wells or as centres of five-, seven- or nine-point elements with producers around, at that part of them may be unavailable. Upon oil separation at the mouth hot water extracted from horizontal producers at high-viscous oil deposits is injected through vertical and/or directional injectors to viscous or high-viscous oil deposits. The distance between the mouth of high-viscous oil producer and viscous or high-viscous oil injector as well as intermediate equipment is assigned provided that temperature loss of transferred water is not more than 10°C for any climatic conditions in this region. Water extracted and separated from oil at water sump at viscous or high-viscous oil deposit is delivered to the steam generating plant, where steam is generated from this water, impurities are separated and dryness factor of 0.6-0.8 is achieved and then water is injected through horizontal injectors to the high-viscous oil deposit, thus forming a continuous water circulation cycle for development of two facilities using heat. At that in order to ensure required compensation levels of extraction by injection the volume of injected water is regulated from the sump where oil is separated from water upon product lifting from the viscous or high-viscous oil deposit.

EFFECT: improving oil recovery, percent of recovery from the reservoir and simultaneous saving of operational costs.

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FIELD: oil and gas industry.

SUBSTANCE: development method of ultraviscous oil deposit includes construction of double-mouth upper injector and lower producer with horizontal sections, which are equipped with strainers having stacked openings. The strainer of the injector horizontal section is divided into two heating areas. Inside the strainer, opposite each heating area, liners with holes are installed, which are run in at ends of pipe strings from mouths of the injector. The liners are fixed rigidly to the respective pipe strings with possibility of hermetic closing or opening of the openings in the injector horizontal section. At the surface inner space of the pipe strings inside the injector are bundled by a pipeline with valves, while tubing-casing annulus of the injector is bundled by suction and discharges pipelines equipped with valves and a steam-generating plant. The pumping unit is bundled by hydraulic lines to tubing-casing annulus of the injector. At closed openings of the strainer at the injector horizontal unit heating of the cross-borehole stratum area is made, viscosity of ultraviscous oil is reduced in the stratum by closed circulation of heat carrier through tubing-casing annulus and inner space of the upper and lower double-mouth wells by the steam-generating plant without injection of the heat carrier to the stratum and heated ultraviscous oil is extracted from the producer. In process of closed circulation of the heat carrier through the injector, when temperature in the extraction area of the producer rises up to the value corresponding to viscosity of ultraviscous oil in the stratum sufficient for its solving by a hydrocarbon solvent the steam-generating plant is switched off and circulation of the heat carrier is stopped. Openings in the strainer of the injector horizontal section are opened by means of their matching to the holes in the liners. Hydrocarbon solvent is pumped by the pumping unit through tubing-casing annulus and strainer to the stratum thus forming a chamber with the solvent in the stratum where heated ultraviscous oil is liquefied. At that heated and liquefied ultraviscous oil is being extracted from the producer. As heated and liquefied ultraviscous oil is extracted, in result of stoppage of steam circulation temperature decreases and viscosity of oil increases in the extraction area up to the value corresponding to viscosity of ultraviscous oil in the stratum insufficient for its solving by hydrocarbon solvent. Thereafter the pumping unit is switched off and openings are closed in the upper double-mount injector by means of their disconnection with liners holes. The steam-generating plant is switched on and circulation of the heat carrier is resumed in the upper double-mouth injector. Further the process is repeated.

EFFECT: excluding water flooding of the stratum and water cut of the extracted oil, potential use of the method at bitumen deposits with thickness of layers up to 5-7 m, even development of the deposit, increasing oil recovery factor.

5 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: proposed method comprises development of non-equilibrium pressure and/or heat feed, and/or gas removal and that of formation fluid formed from hydrates, in gas hydrates occurrence zone. Note here that gas is cleaned and dried and fed to consumer. Besides, this process includes location of local heating source in well, if required. In compliance with this invention, decreased pressure are is created outside occurrence of gas hydrates, that is a phase separator with pressure of 0.3-0.5 of initial pressure in gas hydrate occurrence zone, and receiver with controlled valves. Extracted gas and formation fluid are forced into decreased pressure separator while heated dried gas is forced into gas hydrate occurrence zone. These jobs alternate to initiate heat pressure waves in gas hydrate occurrence zone rock to decrease local pressure therein.

EFFECT: higher efficiency.

6 cl, 1 ex, 1 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: proposed method comprises drilling of parallel production and injection horizontal wells combined with multiple hydraulic fracturing of the seam. Note here that at least one production well is drilled in beds with permeability not over 2 mD. First, one horizontal well is drilled with angle between maximum major strain of the bed and direction of borehole making 30-60 degrees. Multiple hydrofrac is realised thereat. Well is put in operation. If bed pressure decreases by not over 3% a year then further development is performed under natural conditions with drilling the injection wells. Other production wells are drilled parallel with the first one in case the initial geological store of oil per one horizontal well makes at least 50 thou t at spacing between said wells not exceeding 100 m. Multiple hydrofrac is realised for all wells. Note here that the number of multiple hydrofrac stages is selected proceeding from analytic relationship.

EFFECT: higher yield owing higher coverage.

3 ex, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: method involves pumping of working agent through injectors and recovery of the product through producers. The section is selected at the deposit with the following characteristics: remaining reserves of at least 3000 thousand t, reservoir pressure equal or less than initial reservoir pressure, water cut of the produced product within limits of 80-99% and injectability of injectors within limits of 40-140 m3/day at wellhead pressure of 4-15 MPa and permeability of at least 500 mD against results of hydrodynamic research. At this section an injector is selected with perforation interval according to hypsometric marks lying at the maximum height and at least 1 m above the perforation interval of the nearest producer. In the selected injector the injection volumes are limited up to values less than 50 m3/day. For the other injectors placed at 1 m below the perforation interval of the producer the injection volumes are increased per 5% in comparison with volumes injected earlier. In this mode injection is made within 3 months under control over changes in operation mode for producers by measurements of bottomhole pressure and water cut. Similar operations are made with other groups of wells for the selected section of development.

EFFECT: higher oil recovery of the deposit.

2 ex

FIELD: oil and gas industry.

SUBSTANCE: method involves pumping of working agent through injectors and recovery of products through producers. For the purpose of development a pool or a poll part is selected with formation pressure at least equal to the initial one, water cut of 60% and more and recoverable reserves of at least 40 thousand t. Then the post-event analysis is made for the selected section in regard to changes in dynamics of formation and bottomhole pressure and the least worked-out section with content of clay fraction of 2.5% and more. Upon the preformed analysis several design point of drilling for vertical inclined well are replaced by one injector with horizontal completion. The horizontal shaft is placed in the stratum with thickness of at least 3 m. The shaft is constructed at the border of the reservoir collector transition from clayey sandstone to aleurolite. Upon input of the horizontal injector into operation liquid is injected into the stratum under permanent control of changes in operation mode of the surrounding producers by means of bottomhole pressure measurement and product water cut. When bottomhole pressure rises up to the value sufficient to intensify product recovery operations on optimisation of subsurface pumping equipment are made to a bigger standard size. Upon the preformed analysis several design point of drilling for vertical inclined well are replaced by one producer with horizontal completion. The horizontal shaft is placed in the stratum with thickness of at least 3 m. The shaft is constructed at the border of the reservoir collector transition from clayey sandstone to aleurolite. Upon input of the horizontal producer into recover of reservoir liquid is made under permanent control of changes in operation mode of the surrounding producers by means of bottomhole pressure measurement and product water cut. When bottomhole pressure decreases per 10% below saturation pressure operations on injection increase are made through the affecting injectors.

EFFECT: improving oil recovery in the deposit with clayey collector.

2 cl, 2 ex

FIELD: oil and gas industry.

SUBSTANCE: cut-off system includes equipment of the well with at least one packer with or without return valve downstream connected to the cut-off landing nipple directly or through one or several tubes, and running in and out of an electric submersible pump unit at the pipe string. At that the cut-off valve consist of a lock, a case with input and output passing channels, sealing collars, a controlled element and a locking group. According to the invention the system is equipped with a hollow shank interconnected hydraulically from bellow to the cut-off controllable element and to the cavity of the pipe string over the electric submersible pump unit from the above. For this purpose the pipe string and hollow shank upstream and downstream the electric submersible pump unit are equipped respectively with axial and off-centre upper and lower couplings with taps interconnected by a hydraulic channel passing close to the electric submersible pump unit. At that the upper coupling has either a through axial channel or a through off-centre channel or a through axial landing channel. When the upper coupling is made with the landing axial channel then a divider for two cavities is run in at the additional pipe string of a less diameter with a side return valve. The lower coupling is connected hydraulically to remote measuring equipment. Besides the hollow shank with or without crossover unit is equipped with a disconnector with a running tool or without it. At that the cut-off valve is either run in to the well or set to the landing nipple before running in of the electric submersible pump unit or run in to the well at the running tool under the hollow shank and placed to the landing nipple. At that the disconnector under the hollow shank is connected to the disconnector or its controlled element or the landing nipple. The cut-off valve with a lock is equipped by a pressure adjuster and its sealing collars are set either lower or upper than the output passing channel. The case and controlled element of the cut-off valve form a working chamber connected through the hollow shank and hydraulic channel to the cavity of the pipe string or additional pipe string over the electric submersible pump unit. The controlled element is made as a piston or plunger or bellows capable of the locking group opening and closing at start-up and shutdown of the electric submersible pump unit or at the target generation or release of excess pressure in the additional pipe string or the pipe string. The closing group is made as a support saddle assembly and a gate or as a cylinder and a plunger gate. The piston or bellows or the gate is spring-loaded under the preset force. The cut-off valve is made with or without control mechanism to fix position of the controlled element rotated at the rod or in a case of a coded bushing with through or blind cam slots designed for the limiter in the case or at the rod respectively.

EFFECT: improving operational efficiency of the pumping well due to prevention of the productive stratum bullheading downstream the packer at replacement of the electric submersible pump unit.

3 cl, 21 dwg

FIELD: oil and gas industry.

SUBSTANCE: procedure for treatment of bottomhole zone of a producer includes filling in of the productive stratum interval with a solution for asphalt, resin and paraffin depositions with partial flushing to the well bottomhole. Vacuum and pulse simulation is carried out with simultaneous extraction of the reaction products. The interval of the productive stratum is filled in with hydrochloric acid solution, which is flushed partially to the well bottomhole. The process is withheld and vacuum and pulse simulation is carried out with simultaneous extraction of the reaction products. At that in one cycle of vacuum and pulse simulation about 0.01 m3 of liquid is pumped out. During vacuum and pulse simulation upon flushing of the solution for asphalt, resin and paraffin depositions quantity of pulses is increased 3-6 times more than upon flushing with hydrochloric acid solution, moreover volume of the reacted solution to be extracted is equal to the volume of the injected solution for asphalt, resin and paraffin depositions.

EFFECT: improving treatment efficiency of a bore-hole zone.

3 ex

FIELD: oil and gas industry.

SUBSTANCE: invention is related to oil producing industry and may be used successfully for development of oil and gas deposits with hard to recover reserves opening up both carbonate and terrigenous reservoirs, including oils of high viscosity. The concept of the invention is as follows: the method includes oil production from producers, injection of displacement agents to injectors, surveying of geological environment in productive strata and use of physical simulation techniques, registration and analysis of radiated emissions from geological environment both before and upon simulation. According to the invention spatial-temporal aggregate of simulation centres is defined by registration and analysis of time series of radiated emission signals from geological environment areas that cover fields with different fluid saturation, fracturing and stress as well as node areas of high instability within the square area and volume of strata. At that the aggregate is determined before simulation and corrected in its process. Analysis of radiation emission signals is made with consequential transformation of time span and determination of time differences in variation cycles of radiation emission intensity corresponding to fractal substructures of the environment ranging them from the smallest ones. Thereafter in the determined centres against the square area or volume the areas or time spans are specified from which or in compliance with which polyfrequency wave and/or pulse action is made simultaneously at two or more frequencies. At that data on oscillation frequency or pulsed frequency are specified with corrections in process of simulation against the above time differences determined in analysis process of radiation emissions.

EFFECT: improving efficiency of the development method due to simulation of strata by physical emissions thus providing effective oil influx to wells and expanding functionality of the method.

16 cl, 1 ex, 1 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: proposed method consists in application of wave dilation technology. Note here that operation of pumping units in wells is synchronised, said units being equipped with wave dilation effects promoters. To ensure said synchronisation, downhole hardware is furnished with sensors for registration of elastic vibrations and channels for transmission of received signal to the surface at pumping unit operation control board. Note also that synchronisation of every pumping unit in the field is effected in frequency of signal generated pumping unit of master well.

EFFECT: higher efficiency of extraction and oil yield.

FIELD: physics, acoustics.

SUBSTANCE: invention relates to oil and gas industry and can be used on fields with different structural types, including depleted fields and fields with hard to recover reserves. Seismoacoustic investigations during oil extraction include a downhole acoustic radiator generating elastic vibrations in the form of a cylindrical wave horizontally directed into a formation; using seismic detectors mounted on the earth's surface on a profile to detect and measure amplitude-frequency parameters of longitudinal and transverse waves propagating through the formation, said waves being caused by deformation of rocks by elastic vibrations of the downhole acoustic radiator; simultaneously with the seismoacoustic investigations, using the elastic vibrations of the downhole acoustic radiator to create a pressure gradient for displacing oil and extracting oil.

EFFECT: high accuracy of seismoacoustic investigations and higher oil recovery factor.

1 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: in compliance with this method, two rotary pumps are lowered on flow string. Said pumps are driven by downhole motor with two pro-shaft extensions. Top rotary pump feeds into flow string. Bottom pump serves to break bonds of colmatant and to discharge it in, for example, sludge trap. Top pump serves to change well fluid dynamic level and to force produced fluid to the surface. Development process is controlled from the surface by, for example, control station with frequency inverter of downhole motor.

EFFECT: higher efficiency.

2 dwg

FIELD: oil extractive industry.

SUBSTANCE: method includes electro-hydraulic treatment of bed at resonance frequency and extraction of oil from bed. According to invention bed is excited by resilient pulses at broad frequency range from 0 to 10 kHz. Frequencies are set, at which bed is treated. Resonance frequency is kept by singular, periodical, radially focused electro-hydraulic pulses with generation frequency, divisible by bed resonance frequency. Concurrently in adjacent well bed excitation frequency is controlled by resilient pulses and corrected according to measurements results.

EFFECT: higher efficiency.

2 dwg

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