RU2620507C1 - Device for scavenger oil development - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: device for the scavenger oil field development contains a fuel tank and an air supply system at the surface, a downhole gas generator installed in the horizontal part of the casing column of the injection well, connected by coiled tubing of fuel with the fuel tank. At the same time, a fuel activator is connected to the output from the fuel coiled tubing, the output of which is connected to the exit of the downhole gas generator. In this case, the fuel activator contains two electrodes installed in the working chamber and connected by high-voltage wires with a high voltage source. The device also includes systems for supplying Brown's Gas into the air supplied to the downhole gas generator and to the fuel supplied to the downhole gas generator. In this case, the system of Brown's Gas supply into the air fed to the downhole gas generator contains an electrolytic cell filled with water in which two electrodes connected to the power source are installed. Moreover, the system of Brown's Gas supply into the fuel fed to the downhole gas generator contains an electrolytic cell filled with water in which two electrodes connected to the power source are installed.

EFFECT: increased efficiency of combustion process.

19 cl, 1 tbl, 21 dwg

Description

The invention relates to the oil industry and can be used in the development of viscous oil, paraffin oil, bitumen, oil and kerogens from sand and clay rocks of oil-containing deposits. It is also possible to produce oil and gas in offshore fields and in permafrost.

Highly viscous and heavy oil are included in the category of hard-to-recover reserves, which today account for about 36% of the total oil production in the Russian Federation, and experts predict that by 2020 this figure will increase to 77% of all production. To produce one ton of highly viscous or heavy oil, it is necessary to put into development two to five times more hard-to-recover reserves and to drill two to five times more wells in comparison with active reserves. The extraction coefficient of high viscosity and heavy oil, as a rule, is 2-3 times lower than the recovery ratio of oil related to active reserves.

Another, no less significant challenge for the Russian oil industry is the organization of industrial oil production from the Bazhenov formation. The Bazhenov Formation is represented by the source rock, in which the processes of conversion of kerogen to hydrocarbons have not yet been completed. Highly saturated clay deposits of the Bazhenov Formation are almost ubiquitous within the West Siberian Lowland over an area of more than 1 million square kilometers. The total geological oil reserves in them are estimated at between 0.8 and 2.1 trillion tons, and the growth potential of recoverable oil reserves is estimated at no less than 30-40 billion tons. The depth of the Bazhenov Formation is 2500-3000 meters. The thickness of the layer is 10-40 meters. The temperature of the reservoir is 80-130 degrees Celsius. Due to the fact that the rock of the Bazhenov formation has complex capacitive and filtration properties, the coefficient of oil recovery from the Bazhenov formation during its development by traditional methods does not exceed 3-5 percent. With the use of new technologies theoretically reaches 49%.

There is a method of developing an oil deposit by injecting an oxygen-containing mixture into the reservoir, in which to increase the efficiency of oil recovery and the safety of work, a coolant is pumped into the bottom-hole zone of the injection well with a temperature and volume ensuring full consumption of the oxidizing agent at the process initiation stage (Auth. Certificate. USSR No. 1090060).

This method guarantees the safety of the process only at the stage of its initiation. When a heat wave moves through a formation under low-viscosity oil conditions and the fuel deficit associated with this circumstance, oxygen can penetrate into unheated sections of the formation, up to the trunks of production wells. All this provokes an explosive situation at the development site.

In addition, in all known development methods, the natural energy of the field is not taken into account when choosing the object of influence, and at the stage of the initiation of the process, it is assumed that the thermodynamics of the bottom-hole zone are changed by introducing energy from the outside (from the surface), which does not contribute to the achievement of the maximum possible oil recovery and significantly worsens the cost-effectiveness ways.

A known method of developing an oil field according to the patent of the Russian Federation for the invention No. 2139421, publ. 2010, in which, in order to increase oil recovery of light oil fields, it is planned to use thermogas treatment.

According to the known method, the essence of thermogas exposure is that an oxygen-containing mixture is pumped into the formation through an injection well - air, which, as a result of spontaneous in-situ oxidation processes, is transformed into a highly effective displacing agent, partially or completely mixed with the displaced oil. Such a transformation is ensured both due to the formation of CO ₂ as a result of in-situ oxidation processes, and due to the transition of light fractions into the gas phase under the influence of thermal energy released as a result of in-situ oxidation processes. An important criterion for the implementation of thermogas exposure is the level of the initial reservoir temperature, which according to the above method should exceed 65 ° C. The need to comply with this condition is determined by the fact that the intensity of spontaneous in-situ oxidation processes ensures almost complete consumption of oxygen injected into the formation in the zone, the dimensions of which are several times less than the distance between the wells. This means that the injection of an oxygen-containing mixture provides not only the in-situ formation of a displacing agent miscible with the displaced oil, but also the safety of the process.

Thus, the conditions provided for by the known method for the implementation of the thermogas development method make it possible to ensure high efficiency of displacing light oil from the covered drained zones of oil-bearing rocks.

However, according to the non-trivial features of the filtration-capacitive properties of the rocks of the Bazhenov formation and the hydrocarbon content in them, the traditional approach to the formation of a development system with any method of exposure cannot provide effective oil recovery. In this regard, it should first of all be pointed out to the extremely wide range of filtration-capacitive characteristics of lithotypes of rocks of the Bazhenov formation noted above, the unevenness of their development both laterally and vertically. The consequence of such heterogeneity of the reservoir properties of the rocks of the Bazhenov formation is the uneven distribution of drainage zones, often the unpredictable nature of their hydrodynamic connection.

It can be assumed that such a non-trivial nature of the reservoir of the Bazhenov formation is one of the main reasons for the unsatisfactory performance of the fields of the Bazhenov formation in the previous three decades. That is why traditional waterflooding is also assessed as an unpromising way to develop such deposits.

In this regard, it should be noted the important feature of the Bazhenov formation deposits noted above, according to which the light oil contained in the matrix (microcracked part of the rocks) can hardly be extracted using traditional development methods (natural mode, water flooding). It is also obvious that these methods cannot involve hydrocarbon resources of organic matter - kerogen.

The technology of the thermogas method for developing light oil fields with conventional reservoirs according to the aforementioned method provides for the formation of an effective displacing agent miscible with oil in the formation due to spontaneous in-situ oxidation processes when air is injected into the formation. Therefore, the main criterion for the implementation of this technology is the initial reservoir temperature, the level of which should be above 65 ° C.

Field domestic and international experience has confirmed that the injection of air into such reservoirs actually leads to the formation of an effective displacing agent in the reservoir, which ensures oil recovery up to 60% and higher in fields with low permeability reservoirs.

Obviously, the implementation of thermogas exposure in the fields of the Bazhenov formation can also increase the efficiency of oil recovery from drained zones. However, according to the above, this is not enough, because for the effective development of deposits of the Bazhenov formation it is necessary to provide the solution of the following problems:

- to ensure the maximum possible extraction of light oil from the non-drained matrix, as well as hydrocarbons from kerogen, contained in both non-drained and drained rocks;

- to ensure the maximum possible development of the drainage zone not only in the matrix, but also in macrocrack rocks;

- to ensure effective displacement of light oil from drained areas.

To solve these problems, the technology of thermogas impact on the rocks of the Bazhenov formation should be characterized by the following parameters:

- in-situ oxidation processes should ensure the formation in the drained lithotypes of rocks moving zones of heat generation;

- the dimensions of the heat generation zone, the speed of its movement to the producing wells, as well as the temperature level in it should provide the maximum possible volume of oil-containing non-draining matrix to a temperature of at least 250-350 ° C, at which at least 40-50% is extracted according to generalized experimental data contained in the light oil matrix.

In this regard, it should be emphasized that with the increase in the size of the thermal rim, the size of the heating zone of the non-drained zone also increases. Simultaneously with an increase in the speed of movement of the thermal rim in the drained zone, the heating depth of the adjacent non-drained zone decreases.

In turn, the size of the heat-generating rim in the drained zone and its speed of movement are largely determined by the rate of injection of the oxygen-containing mixture, in particular air and water, and the air-water ratio. Moreover, if the rate of injection of working agents leads to an increase in the size of the heat generation zone, then the water-air ratio can lead to both its increase and its reduction.

A known method and device for the development of viscous oil according to the patent of the Russian Federation for the invention No. 2418944, IPC EV 43/04, publ. May 20, 2011 (prototype).

The device comprises a water heater, fuel tanks and an oxidizing agent on the surface, a gas generator installed in the horizontal part of the casing of the heating well, connected by pipelines to the oxidizing tanks, fuel tanks and a water heater.

The principal feature of the proposed development method is that the air-water ratio of the water and air injected into the drained lithotypes of the rocks of the Bazhenov formation, the rate and pressure of their injection are determined from the condition that it is necessary to heat to the temperature not lower than 250 ° C the maximum possible volume of the oil-containing impenetrable matrix surrounding drainage heat-generating zones of the reservoir. The implementation of such regulation makes it possible to ensure not only effective miscible displacement of light oil from drained zones, but also the introduction into active development of oil-containing micropermeable zones.

In this regard, it should be emphasized that the injection of a water-air mixture allows us to realize not only in-situ oxidation processes, as provided for in a known manner, but also provide on this basis a miscible displacement of light oil and thermal effects, but also hydraulic action. As noted above, this effect allows to increase the drainage zone due to the creation of additional new cracks and partial opening of existing microcracks. It is obvious that the simultaneous thermal and hydraulic effects should lead to a synergistic result in the expansion of the drainage zone and a significant increase in its filtration characteristics.

The task of creating a group of inventions is to obtain the maximum combustion efficiency in a downhole gas generator.

The solution of these problems was achieved in a device for developing a field of hard-to-recover oil containing a fuel tank and an air supply system on the surface, a downhole gas generator installed in the horizontal part of the casing of the injection well, connected by coiled tubing of the fuel to the fuel tank, so that it is connected to the exit of the coiled tubing of the fuel a fuel activator, the output of which is connected to the inlet of the downhole gas generator, while the fuel activator contains two electrodes installed in the working chamber aere and connected by high-voltage wires to a high voltage source, the device also contains a system for supplying Brown gas to the air supplied to the downhole gas generator and fuel supplied to the downhole gas generator, while the system for supplying Brown gas to the air supplied to the downhole gas generator contains an electrolyzer, filled with water, in which two electrodes are installed, connected to a source of electricity, and the Brown gas supply system for fuel supplied to the downhole generator contains an electrolyzer filled with water, in which two electrodes are installed, connected to a source of electricity.

The function of one of the electrodes can be performed by a housing of a fuel activator. The housing of the fuel activator can be made cylindrical.

The fuel activator can be made magnetic.

The fuel activator can be made electric.

An air ionizer can be installed in front of the inlet of the downhole gas generator, while the air ionizer contains two electrodes installed in the working chamber and connected by high voltage wires to a high voltage source.

The function of one of the electrodes can be performed by the air ionizer body. The housing of the air ionizer can be made cylindrical.

A device for developing a field of hard-to-recover oil may contain a control unit.

The control unit can be electrically connected to regulators. A device for developing a field of hard-to-recover oil may contain fuel and air flow sensors, which are connected by electrical connections to the control unit.

Air holes may be configured to swirl air. The fuel nozzles may be configured to swirl the fuel.

Air holes can be made with the possibility of swirling air, and the nozzle of the fuel made with the possibility of swirling fuel. The cell can be installed on the surface.

The cell can be installed in the injection well. The air supply system may include an air heater.

The fuel supply system may include a fuel heater.

The air supply system may include an air heater, and the fuel supply system may include a fuel heater.

The invention is illustrated in the drawings of FIG. 1 ... 21, where:

- in FIG. 1 shows a diagram of a device

- in FIG. 2 shows the design of the downhole gas generator,

- in FIG. 3 shows the design of the electronic unit and its connection with the downhole gas generator,

- in FIG. 4 shows view A,

- in FIG. 5 shows view B,

- in FIG. 6 shows the design of the electric activator of fuel,

- in FIG. 7 shows the design of the electromagnetic fuel activator,

- in FIG. 8 shows the design of an air ionizer mounted on a downhole gas generator,

- in FIG. 9 shows the design of an air ionizer mounted on a surface,

- in FIG. 10 shows a second embodiment of an air ionizer mounted on a surface,

- in FIG. 11 shows the nozzle head of a downhole gas generator,

- in FIG. 12 shows a section CC

- in FIG. 13 shows the fuel nozzle,

- in FIG. 14 shows a section D-D,

- in FIG. 15 shows a diagram with stirring brown gas into the air, the electrolyzer is installed on the surface,

- in FIG. 16 shows a circuit with stirring brown gas into the air, the electrolyzer is installed in the injection well,

- in FIG. 17 shows a diagram with stirring Brown gas into the air, the electrolyzer is mounted on the surface,

- in FIG. 18 shows a circuit with stirring brown gas into the air, the electrolyzer is installed in the injection well,

- in FIG. 19 shows a device with an air heater,

- in FIG. 20 shows a device with a fuel heater,

- in FIG. 21 shows a device with air and fuel heaters.

A device for the development of hardly recoverable oil (Fig. 1 ... 21) contains an injection well 1, in which a casing 2 is installed having vertical and horizontal sections 3 and 4, respectively. In the horizontal section 4 of the casing string 2, a downhole gas and gas generator 5 is installed with a fuel activator 6, and possibly an ionizer 7 installed at the entrance to it. At the top of the casing 2 at the mouth, i.e. above the surface 8, the collector is made 9. The horizontal section 4 is made within the oil reservoir 10.

The device has the following equipment installed on the surface 7 (Fig. 1).

The fuel tank 11 is connected by a pipe 12 to a fuel compressor 13 having a drive 14 and then with coiled tubing 15. Coiled tubing 15 is connected by a flexible pipe 16 through a fuel activator to a downhole gas generator 5.

In addition, the device comprises a cable reel with cable 17, one end of which is connected to the fuel activator 6, and the other to the output of the high voltage unit 18, to the input of which low voltage wires 19 are connected, connected to the electric power source 20. The second output from the high voltage unit 18 is ground wire 21 is connected to the casing 2.

The device comprises an air supply system 22, in turn, containing a compressor 23 with a drive 24. A flow regulator 25 is connected to the outlet of the compressor 23, to the outlet of which a shut-off valve 26 is connected, and then the supply system is connected to the manifold 9.

Downhole gas generator 5 is designed to burn fuel in the air. In order to completely burn the fuel and there is no oxygen left in the air, it is necessary to ensure their stoichiometric ratio to activate.

The stoichiometric ratio between the components of the fuel (oxidizing agent and fuel) is only a theoretical measure in assessing the actual composition of the fuel. The actual ratio between the components of the fuel is estimated through the coefficient of excess oxidizer α.

At α> 1.0, the fuel contains an excess of oxidizing agent, and at α << 1.0, an excess of combustible elements.

From the point of view of thermodynamics, it is preferable to burn fuel at α = 1.

However, due to inaccuracy in the regulation of the consumption of fuel components and incomplete combustion, it is advisable to allow a small excess of fuel α = 0.9.

In the upper part, the casing 2 is closed by a sealed cap 27, in the openings of which pass the flexible pipe 16 and cable 17. The flexible pipe 16 and cable 17 are sealed in the cover 27.

For oil and gas production, a production casing 28 with downhole filters 29 in a horizontal section 30, a pump out pump 31, a separator 32 and a filter 33 connected in series with a pipe 34 is intended. The pump out pump 31 has a drive 35. The outlet from the filter 33 is connected to the oil pipe 36.

The second outlet of the separator 32 is connected by a pipe 37 to the fuel tank 11. A water drain 38 is connected to the third outlet of the separator 32.

The device may comprise a control unit 39. Actuators 14, 24, 35 and a flow regulator 25 and a shut-off valve 26 are connected to the control unit 39 by electrical connections 40.

The device can be equipped with flow sensors for fuel 41 and air 42, connected by electrical connections 40 to the control unit 39 (Fig. 2).

In more detail, the design of the downhole gas generator 5 is shown in FIG. 3. The downhole gas generator 5 comprises a housing 43 in the form of a steel pipe with upper and lower nipples 44 and 45 having tapered threads 46 and 47 and a sleeve 48 at the upper end of the housing 43. The upper end of the sleeve 48 is closed by a tapered thread 49 with a plug 50 through which flexible conduit 16 and cable 17. A nipple 51 is screwed into the center of the plug 50 to which a fuel nozzle 52 is connected. Openings 53 for air passage are made in the plug 50. An ignition plug 54 is mounted on the plug 50 and is connected by a channel 55 to a cavity 56 inside the housing 43. An electrical connector 57 is made on the upper end of the spark plug 54, which is connected by a wire 58 to the cable 17. A fuel activator 6 is connected to the nipple 51 by an output connected to a flexible pipeline 16. The activator of the fuel 6 has an electrode 59, which is connected by a wire 60 to the cable 17.

A tapering nozzle 61 is installed in the lower part of the housing 43. A catalyst 62 can be installed in the cavity 56. At least one centralizer 63 can be installed on the housing 43 (Fig. 3).

In FIG. 4 and 5 show the borehole gas generator from above and below.

In FIG. 6 shows in more detail the design of the electric activator of fuel 6. It contains a housing 64 made of metal, cylindrical in shape and attached on one side to the flexible pipe 16, and on the other to a nipple 51. Inside the housing 64, an annular electrode 59 made of metal is installed to it is connected to a radial holder 65 installed in the insulator 66. The radial holder 65 is electrically conductive and connected by a wire 60 to the cable 17. The electrode 59 is mounted on centralizers 67, which are made of dielectric wow stuff.

In FIG. 7 shows an electromagnetic fuel activator. It further comprises permanent magnets 68 mounted inside the housing 64.

In FIG. 8 shows in more detail the design of the air ionizer 7. The air ionizer 7 comprises a housing 69 made of metal, cylindrical in shape and attached to a plug 50. On top of the housing 69 is closed by a lid 70 having openings 71 for air passage. Inside the body 69, an annular metal electrode 72 is mounted, made of metal, and a radial holder 73 mounted in the insulator 74 is attached to it. The radial holder 73 is electrically conductive and connected by a cable 75 to the cable 17.

The air ionizer 7 for shallow wells can be installed on the surface 8 (Fig. 9 and 10).

In this case, the air ionizer 7 can be made electric (Fig. 9 or magnetoelectric (Fig. 10). In the latter embodiment, it additionally contains permanent magnets 76.

In FIG. 11 shows the nozzle head of a downhole gas generator, and FIG. 12 shows a section CC, from which it can be seen that the holes 53 are made at an angle to the end face of the plug 50. In FIG. 13 shows a fuel nozzle 52, which contains a cavity 77, side holes 78 and a central hole 79. In FIG. 14 shows a section D-D, from which it follows that the side holes 78 are tangentially made to swirl the flow of fuel at the outlet of the nozzle.

In FIG. 15 is a diagram of a device with a supply of Brown gas into the air going into the downhole gas generator 5.

Brown gas (chemical formula - NNO) is a gas consisting of two parts of gaseous hydrogen and one part of oxygen. In the same proportions, these chemical elements are found in water vapor. However, Brown gas has a significant difference compared to industrial hydrogen and oxygen.

Ordinary hydrogen and oxygen exist in the form of H2 and O2 (that is, the molecules of both gases have two atoms each). Such a state for oxygen and hydrogen is more stable than the state of separately existing atoms in the form of charged ions. However, before being converted to water (H20), the gases must be decomposed into H and O atoms.

It is in the Brown gas that the hydrogen and oxygen molecules are in the monatomic state (one atom per molecule). And the uniqueness of the Brown gas lies in the fact that during the combustion of hydrogen and its reaction with oxygen, 3.8 times more energy is released compared to the process of burning molecular hydrogen.

It is especially important to note the benefits of using Brown gas in internal combustion engines (ICE): this is an increase in engine power, increased mileage of the car at the same fuel consumption, more complete combustion and, as a result, reduction of harmful emissions into the atmosphere. The monatomic hydrogen contained in the Brown gas, being a superstrong catalyst, makes the process of combustion of the fuel-air mixture much more efficient.

The electrolysis process takes place in a generator (electrolyzer). It consists of electrodes made of stainless steel and separated by a dielectric. The electrical conductivity of water is increased due to the electrolyte (potassium or sodium hydroxide). Electric current is supplied from the car battery. In this case, only the excess energy of the car is used. Gas productivity is measured in liters per minute (l / m). Productivity equal to 1 l / m is considered basic. Water gas from the electrolyzer is supplied to the engine through an air manifold. Smaller water gas molecules collide with larger pre-heated fuel molecules and destroy their covalent bonds. There is a finer atomization of the fuel, which is burned in the form of steam, rather than large droplets, as it is usually supplied to the engine.

The device (Fig. 15) contains a system for supplying Brown gas 80 to the air supply system 22 with an electrolytic cell 81 filled with water, in which two electrodes 82 and 83 are connected to the electric power source 20. A tank with water 85 is connected via a pipe 84 to the electrolyzer 81. The cell 81 is mounted on the surface (Fig. 15).

An embodiment is possible when the electrolyzer is installed in the injection well in front of the downhole gas generator 5 (Fig. 16).

It is possible to fill the cavity of the cell 81 with a catalyst. Such an embodiment in FIG. 1 ... 21 is not shown.

The device (Fig. 17) contains a system for supplying Brown gas 86 to a fuel supply system with an electrolytic cell 87 filled with water, in which two electrodes 88 and 89 are connected to the electric power source 20. A tank with water 91 is connected to the electrolyzer 87 by a pipe 90.

A variant is possible when the cell 87 is installed on the surface (Fig. 17).

An embodiment is possible when the electrolyzer is installed in the injection well in front of the downhole generator 5 (Fig. 18).

In FIG. 19 shows a device with an air heater 92, which is installed in the air supply system 22 to the downhole gas generator 5.

In FIG. 20 shows a device with a fuel heater 93, which is installed in the fuel pipe 22.

In FIG. 21 shows a device with air heaters 92 and fuel 93.

DEVICE OPERATION

Before the work is completed, an injection well 1 (horizontal) is drilled and a casing 2 is installed in it (Fig. 1).

Using coiled tubing 15 on the flexible pipe 16, the downhole gas generator 5 is lowered into the casing 2 to the maximum depth in the bottom of the well 1. Fuel enters the downhole gas generator 5 through the coiled tubing 15 through the flexible pipe 16 and the fuel activator 6, where it is partially converted to hydrogen and radicals and ionization.

The voltage is applied via cable 17 through wire 58 to the spark plug 54, as a result of which the fuel ignites in the cavity 56 which is the combustion chamber. The combustion products with sound velocity flow from the tapering nozzle 61 into the injection well 1. The combustion products warm the oil reservoir 10.

The drive 35 of the pump 31 is turned on and a mixture of oil, gas and water is pumped from the production string 28, which are separated into fractions in the separator 32. After the filter 33, the refined oil goes to the consumer, for example, to the pipeline 36. The liquefied fractions obtained can also be supplied to the pipeline as a result of oil production along with it. Water is discharged through the pipeline 38. Gas through the pipeline 37 is supplied to the tank 11.

Process control is carried out (Fig. 2) automatically or manually. For this, the readings of flow meters 41 and 42 are used. According to the readings of the air flow meter 42 and fuel 41, the optimum ratio of fuel components is maintained

α = 0.9 ... 1.0.

The comparison results of the proposed method for the production of viscous oil with the prototype are given in table. one.

The heating time for a given volume decreased by about 30 times.

Injection into the reservoir from the surface of the earth or from an offshore platform of superheated water with a subcritical temperature (below 374 degrees Celsius) or with a temperature higher than critical (above 374 degrees Celsius) and high overpressure, which allows reaching the indicated water temperatures without boiling and without steam formation directly on surface, but with the formation of a large amount of steam in the bottomhole or bottomhole zone of the well during the delivery of superheated water from a ground-based boiler plant.

At a high overpressure of 218.5 atmospheres, water can be heated to a critical point corresponding to a temperature of 374 ° C (Fig. 15). At the same time, the density of water during its heating to a critical point will remain virtually unchanged from the original, which allows you to deliver it to the place of use - bottom-hole or bottom-hole zone of the well in a compact form with low heat loss due to high speed due to pressure difference - higher on the surface of the earth and lower in the well. At the same time, due to lower pressure in the well, water will boil and a large amount of steam will be ejected into the well.

In the case of the presence of high pressure in the well, above 218.5 atmospheres, for the formation of steam in the heater (ground-based boiler plant), it is necessary to raise the water temperature above the critical 374 ° C, to create a pressure above 218.5 atmospheres.

Due to the pressure of the water column in the supply pipe, the height of which can be several kilometers, additional pressure of the coolant-water of about 100-300 atmospheres will be formed. This will reduce the load on the water pump and reduce the energy costs of its drive.

The use of air swirl will intensify the combustion process. In FIG. 11 shows the nozzle head of a downhole gas generator, and FIG. 12 shows a section CC, from which it can be seen that the holes 53 are made at an angle to the end face of the plug 50 for twisting.

In FIG. 13 shows a fuel nozzle 52 which comprises a cavity 77, side holes 78 and a central hole 79. In FIG. 14 shows a section D-D, from which it follows that the side openings 78 are tangentially made to swirl the flow of fuel at the outlet of the nozzle.

In the case of applying the Brown gas gas mixing system 80 to the air in the air supply system 20 (FIGS. 15 and 16), the electrodes 82 and 83 of the electrolytic cell 81 are supplied with voltage from the electric power source 20. Water decomposes into atomic hydrogen and oxygen, which form Brown gas.

If a container with water 85 is connected to the electrolyzer 81 by a pipe 84, then water from it constantly enters the electrolyzer 81 as it decomposes.

The Brown gas-fuel mixing system works similarly (Figs. 17 and 18).

If a device is used (Fig. 19) with an air heater 86, which is installed in the air supply system 22, then the air is heated before it is supplied to the downhole gas generator 6.

If a device is used (Fig. 18) with a fuel heater 87, which is installed in the fuel pipe 22, the fuel is heated.

If a device is used (FIG. 20) with air heaters 86 and fuel 87, then both air and fuel are heated simultaneously. This will save fuel consumption in the downhole gas generator 6.

The application of the invention allowed:

1. To increase the completeness of fuel combustion in the downhole gas generator, completely eliminating the ingress of oxidizing agent (oxygen) into the oil reservoir and eliminate explosions due to the accumulation of oxygen and its reaction with hydrocarbons through the use of a fuel activator and / or air ozonizer;

2. To increase the completeness of fuel combustion up to 100% due to the use of Brown gas.

Claims (19)

1. A device for developing a field of hard-to-recover oil containing a fuel tank and an air supply system on the surface, a downhole gas generator installed in the horizontal part of the casing of the injection well, connected by a coiled tubing of a fuel to a fuel tank, characterized in that a fuel activator is connected to the outlet of the coiled tubing the output of which is connected to the inlet of the downhole gas generator, while the fuel activator contains two electrodes installed in the working chamber and connected to a high with high voltage source wires, the device also contains systems for supplying Brown gas to the air supplied to the downhole gas generator and fuel supplied to the downhole gas generator, while the system for supplying Brown gas to the air supplied to the downhole gas generator contains an electrolyzer filled with water, in which two electrodes are installed connected to a source of electricity, and the Brown gas supply system for fuel supplied to the downhole gas generator contains an electrolyzer filled with water, in which there are two electrodes connected to a source of electricity. 2. A device for developing a field of hard-to-recover oil according to claim 1, characterized in that the fuel activator body performs the function of one of the electrodes. 3. A device for developing a field of hard-to-recover oil according to claim 1 or 2, characterized in that the housing of the fuel activator is cylindrical. 4. A device for developing a field of hard-to-recover oil according to claim 1 or 2, characterized in that the fuel activator is made magnetic. 5. A device for developing a field of hard-to-recover oil according to claim 1 or 2, characterized in that the fuel activator is electric. 6. A device for developing a field of hard-to-recover oil according to claim 1 or 2, characterized in that an air ionizer is installed in front of the downhole gas generator, while the air ionizer contains two electrodes installed in the working chamber and connected by high voltage wires to a high voltage source. 7. A device for developing a field of hard-to-recover oil according to claim 6, characterized in that the function of one of the electrodes is performed by the air ionizer body. 8. A device for developing a field of hard-to-recover oil according to claim 6, characterized in that the housing of the air ionizer is cylindrical. 9. A device for developing a field of hard-to-recover oil according to claim 1 or 2, characterized in that it contains a control unit. 10. A device for developing a field of hard-to-recover oil according to claim 9, characterized in that the control unit is connected by electrical connections with the regulators. 11. A device for developing a field of hard-to-recover oil according to claim 9, characterized in that it contains fuel and air flow sensors, which are connected by electrical connections to the control unit. 12. A device for developing a field of hard-to-recover oil according to claim 1 or 2, characterized in that the air holes are configured to swirl air. 13. A device for developing a field of hard-to-recover oil according to claim 1 or 2, characterized in that the fuel nozzles are configured to twist the fuel. 14. A device for developing a field of hard-to-recover oil according to claim 1 or 2, characterized in that the air holes are arranged to swirl air, and the fuel nozzles are arranged to swirl fuel. 15. A device for developing a field of hard-to-recover oil according to claim 14, characterized in that the electrolyzer is installed on the surface. 16. A device for developing a field of hard-to-recover oil according to claim 14, characterized in that the electrolyzer is installed in the injection well. 17. A device for developing a field of hard-to-recover oil according to claim 1 or 2, characterized in that the air supply system comprises an air heater. 18. A device for developing a field of hard-to-recover oil according to claim 1 or 2, characterized in that the fuel supply system comprises a fuel heater. 19. A device for developing a field of hard-to-recover oil according to claim 1 or 2, characterized in that the air supply system comprises an air heater, and the fuel supply system comprises a fuel heater.

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