RU2433255C1 - Method of gas hydrate development - Google Patents

Abstract

FIELD: oil and gas production.

SUBSTANCE: gas hydrate field is reamed. A heat flow is generated. Methanol is synthesised by hydrocarbon gas (methane) oxidation outside of a gas hydrate decay zone by direct homogeneous hydrocarbon gas oxidation described by presented formula. Discharged hydrocarbon gas and formation water are separated. Methanol is supplied in a gas hydrate zone, and light-end reaction products are burned with heat and/or electric energy generated to produce a high-pressure heat flow supplied to the gas hydrate zone.

EFFECT: more efficient gas production from gas hydrate fields by increasing the debit, lower power consumption and improved ecological compatibility.

14 cl, 7 dwg, 5 ex

Description

The invention relates to the field of gas and oil industry, and in particular, to the development of deposits (deposits) of gas hydrates.

There is a known thermal method for developing a gas hydrate reservoir, which includes thermal exposure of a reservoir by burning part of the hydrocarbon feed in its place using the generated hot products to warm the reservoir (E.V. Kreinin. Unconventional thermal technology for producing hard-to-recover hydrocarbon feedstocks. - Gas industry - 2005 - No. 3 - p.22).

A common feature of the known and proposed methods is the thermal effect on the reservoir of gas hydrate deposits.

The disadvantages of this method include:

- hardly feasible ignition of methane directly in a gas hydrate medium due to its impermeability;

- high energy costs for pumping an oxidizing agent for methane combustion (for example, 963 kW of electric power is required to compress 1 kg / s of air from atmospheric to reservoir pressure 6.5 ÷ 7.0 MPa).

A known method of developing a gas hydrate deposit, including drilling a reservoir crossing a formation with at least one multilateral well with horizontal shafts, generating a heat flow in the underlying underlying formation and selecting hydrocarbons from the overlying gas hydrate formation, the heat flow being generated by initiating in-situ combustion and maintaining the combustion front in the underlying formation by supplying an oxidizing agent through the annulus between the pump compressor pipes — tubing and production casing with perforated holes in the initial section of the horizontal section, the length of which is selected from the condition that the gas-water mixture formed as a result of decomposition of gas hydrates is heated to a temperature that prevents the formation of gas hydrates during its movement in the interval from the roof of the underlying formation to the mouth wells, while the selection of hydrocarbons - natural gas with water is carried out through multi-barrel perforated horizontal branches (Pa awning RU No. 2306410, E21B 43/24, publ. 09/20/2007).

Common features of the known and proposed methods are

- downhole drilling;

- creating a heat flow;

- the allocation of a gas hydrate formation hydrocarbon gas with water under the influence of a heat flow;

- selection of natural gas with water.

The disadvantage of this method is that for its implementation it is necessary to additionally have gas hydrates located below the formation, from which gas is produced, underlying hydrocarbon layers (oil or gas) capable of providing in-situ combustion with heat transfer to the overlying gas hydrate formation. Deposits with such an arrangement of formations are quite unique and therefore the application of the method under consideration is limited. Artificial formation of a downstream hydrocarbon reservoir increases the cost of well construction, complicates the technology of gas production, which leads to a decrease in the efficiency (profitability) of gas production from hydrates. In addition, for the implementation of this method, it is necessary to pump a large amount of air into the reservoir and expend a large amount of electrical energy.

The closest in technical essence and the achieved result to the proposed one is the known method of gas production from gas hydrates (RU No. 2169834 C1, IPC ⁷ E21B 43/16, E21B 43/24), which includes the supply of heat to the decomposition zone of gas hydrates by conducting in the decomposition zone gas hydrates of an exothermic catalytic reaction with a specific heat exceeding the heat of dissociation of solid gas hydrate.

Wherein:

- the oxidation of methane to synthesis gas is used as a catalytic reaction;

- the electrochemical oxidation of methane to synthesis gas is used as a catalytic reaction;

- a partial oxidation of methane to CO ₂ and water is used as a catalytic reaction;

- oxidative dimerization of methane is used as a catalytic reaction;

- the oxidation of methane to methanol is used as a catalytic reaction;

- released gas is subjected to additional chemical processing directly in the production zone.

The heat released directly in the decomposition zone of gas hydrates during the catalytic reaction is spent on maintaining the reactor in autothermal mode, as well as on the decomposition of adjacent gas hydrates.

Common features of the known and proposed methods are

- downhole drilling;

- creating a heat flow;

- oxidation of methane to methanol;

- contact of the heat flux containing methanol with the decomposition zone of gas hydrates;

- decomposition of gas hydrates under the influence of heat flow;

- removal of released hydrocarbon gas and formation fluid.

This method has the following disadvantages.

There is a high probability of explosions in the decomposition zone of gas hydrates during exothermic catalytic reactions of methane oxidation due to the fact that methane mixtures with air (oxygen) are extremely explosive (explosion limits: lower 5 vol.%, Upper 15 vol.%). In-situ explosions can lead to the formation of cracks in the layers that isolate the gas hydrate zone, and, as a result, to uncontrolled depressurization of the latter and to an environmental disaster in the gas production area. To reduce the explosion hazard, it is necessary to use sophisticated high-precision equipment inside the borehole in extreme conditions, dosing the amount of interacting substances, which leads to a rise in the cost of technological equipment and a decrease in the profitability of gas production.

The use of rare earth compounds of the La ₂ Ru ₂ (or Ir ₂ ) O ₇ type, perovskite of the LaRhO ₃ type containing rare earth metals, NiO-CaO, NiO-MgO, CoO-MgO, NiO-rare-earth oxide, catalysts The Ni / Al ₂ O ₃ , Ni-containing complex oxide system, perovskite of the LaNi _1-x Rh _x O _{y type} increases the capital and operating costs (the latter are necessary for periodic replacement of catalysts) by gas production technology and reduces production profitability.

High energy costs for the injection of an oxidizing agent of methane, in particular air, from atmospheric pressure to pressure in the zone of gas hydrates. As mentioned above, the costs are about 963 kW per 1 kg / s of air.

The technical task of the invention is to increase the efficiency of gas production from gas hydrate deposits by increasing the flow rate, reducing energy and capital costs and environmental friendliness.

This object is achieved by the fact that in the method of developing a gas hydrate deposit, including its borehole drilling, creating a heat flux, synthesizing methanol by oxidizing hydrocarbon gas (methane), contacting the heat flux containing methanol with the gas hydrate zone, decomposing them and taking them out when This hydrocarbon gas and reservoir fluid, the new is that the discharged hydrocarbon gas and reservoir fluid are separated, the synthesis of methanol is carried out by oxidation of the hydrocarbon gas (methane) outside decomposition of gas hydrates by direct non-catalyst homogeneous oxidation of a hydrocarbon gas described by the formula

,

,

at the same time, methanol is fed into the gas hydrate zone, and the gaseous reaction products are burned to produce thermal and / or electric energies, with the help of which they create a high-pressure heat flow supplied to the gas hydrate zone, and which are used for technological and / or domestic needs.

In addition, when drilling a field with several wells, the methanol synthesis reaction and the generation of electric energy are carried out centrally, and heat flows create and methanol is supplied to the gas hydrate zone at the borehole locations.

In addition, in a homogeneous oxidation reaction, atmospheric air or / and oxygen is used as an oxygen carrier after the decomposition of water from the formation fluid by electric means, and hydrogen after decomposition of water is burned to produce thermal energy.

In addition, the reaction of homogeneous oxidation of hydrocarbon gas is carried out at a pressure of up to 10.0 MPa and a temperature of up to 500 ° C.

In addition, the reaction of the homogeneous oxidation of hydrocarbon gas is carried out in several stages with the cooling of the reaction products before each subsequent stage to the temperature at which the reaction begins.

In addition, methanol is fed into the gas hydrate zone in a vapor state.

In addition, when creating a heat flow, hydrocarbon gas obtained after liquid separation is used as a heat carrier.

In addition, when creating a heat flow, a mixture of hydrocarbon gas obtained after separation of the liquid and methanol or an aqueous solution of the latter is used as a heat carrier.

In addition, when creating a heat flow, the coolant is heated with electricity inside the well.

In addition, the heat flow is fed into the gas hydrate zone with variable temperature, pressure and flow.

In addition, the heat flow is fed into the gas hydrate zone along the length of one or more horizontal or inclined wellbores located in the gas hydrate zone.

In addition, the movement of the coolant and the discharged hydrocarbon gas and reservoir fluid is carried out in countercurrent flow along the wellbore.

In addition, methanol is separated from the formation fluid, which is mixed with the synthesized methanol supplied to the gas hydrate zone.

In addition, excess methanol is sent for processing and / or for use as an inhibitor in gas transport.

The technical method, which consists in the fact that the creation of a heat stream for supplying gas hydrates to the zone and the synthesis of methanol, which is also fed to the gas hydrates zone, is carried out outside the gas hydrates decomposition zone, i.e. on the ground part of the field, which allows for safe and controlled two technologically and technologically complex processes.

The production of methanol synthesis by the reaction of direct non-catalyst homogeneous oxidation of a hydrocarbon gas described by the formula

,

,

allows technically and technologically simple (without capital and operating costs for catalysts) to obtain methanol and thermal energy for autothermal mode of reaction support.

The combustion of gaseous products released during the methane oxidation reaction to produce thermal and / or electrical energies allows using the latter to create a high-pressure heat flow, which is fed into the gas hydrate zone and the hydrates decompose by heat. The combined use of methanol and high-pressure heat flux in the gas hydrate zone allows intensifying the decomposition of gas hydrates and, as a result, increasing the productivity of the field being developed.

The use of the obtained heat and electric energy for technological and / or domestic needs can reduce energy consumption from specialized energy-producing enterprises and thereby reduce operating costs.

The technique, which consists in the fact that when drilling a field with several wells, the methanol synthesis reaction and the generation of electric energy are carried out centrally, and heat flows are created and methanol is supplied to the gas hydrate zone in the places where the well is drilled, eliminating the loss of thermal energy during transportation of the coolant.

The technique, which consists in the fact that atmospheric air is used as an oxygen carrier in a homogeneous oxidation reaction, simplifies the overall production technology and thereby reduces capital costs for it.

The technique, which consists in the fact that oxygen is used in the reaction of homogeneous oxidation of hydrocarbon gas after the decomposition of water from the formation fluid by electric means, eliminates the use of atmospheric air and thereby improve the environment at the production site.

The burning of hydrogen after decomposition of the formation fluid during heating of the compressed gas allows you to get additional heat to create a heat flow and ultimately increase the productivity of gas production.

Carrying out the reaction of homogeneous oxidation of hydrocarbon gas at a pressure of up to 10.0 MPa and a temperature of up to 500 ° C allows you to get the maximum amount of synthesized methanol in one step.

Carrying out the reaction of homogeneous oxidation of hydrocarbon gas to methanol in several stages with cooling of the reaction products before each subsequent stage to the temperature of the beginning of the reaction allows increasing the amount of synthesized methanol and, accordingly, increasing the amount of decomposable hydrates and produced gas.

The supply of methanol to the zone of gas hydrates in the vapor state allows to increase the contact area and to intensify the decomposition of hydrates.

When creating a heat flow, the use of hydrocarbon gas obtained as a heat carrier after separation of the formation fluid allows using its pressure, reducing the energy consumption for creating a high-pressure flow, and, ultimately, reducing operating costs.

The use of a mixture of hydrocarbon gas obtained after separation of the formation fluid and methanol or an aqueous solution of the latter when creating the heat flux as a heat carrier makes it possible to increase the heat capacity of the heat flux and thereby increase the amount of decomposable hydrates and produced gas.

Heating during the creation of a heat carrier flux by electric energy inside the well allows eliminating heat loss along the vertical wellbore and thereby increasing well productivity, as well as eliminating heat transfer to the permafrost layer in the northern fields and, as a result, preserving the environment.

The heat flow to the gas hydrate zone with variable temperature, pressure and flow rate initiates thermobaric waves in the gas hydrate zone, which accelerate the destruction of hydrates and increase gas productivity.

The supply of heat flow to the gas hydrate zone along the length of one or more horizontal or inclined boreholes located in the gas hydrate zone allows the heat flux acting on gas hydrates to be formed over a large area, to increase the area of their destruction and thereby increase the productivity of the well.

Moving the coolant and the hydrocarbon gas and formation fluid removed from the gas hydrate zone in countercurrent flow along the wellbore allows us to optimize the number of trunks in the well structure and thereby reduce the capital costs of its construction.

The separation of methanol from the formation fluid, which is mixed with the synthesized methanol supplied to the gas hydrate zone, makes it possible to intensify the process of decomposition of gas hydrates and increase the flow rate of the well.

Sending excess methanol for processing makes it possible to obtain fuels and lubricants from it (for example, according to the Mobile Process) and, thereby, increase the profitability of gas production. The use of methanol as an inhibitor in gas transport increases the reliability of the latter due to the exclusion of hydrate formation in pipelines.

The authors are not aware of the current level of technology to increase the efficiency of gas production from gas hydrate deposits in this way.

Figure 1-7 presents diagrams and drawings illustrating the technological and technical aspects of the implementation of the method of developing a gas hydrate field.

The development of gas hydrates according to the proposed method is as follows.

The field is drilled by one or several wells, a heat flow is created, under the influence of which hydrocarbon gas and reservoir fluid are released from the gas hydrate zone, which are taken (removed) from the zone along line 1 (Fig. 1) and separated in the separator 2 into hydrocarbon gas and liquid . Hydrocarbon gas can be partially supplied to the consumer through line 3 depending on the technological needs.

Hydrocarbon gas (methane) is withdrawn from line 3 and fed to reactors 5 through line 4, in which it is subsequently directly oxidized directly to methanol. The homogeneous oxidation of hydrocarbon gas is carried out at a pressure of up to 10.0 MPa and a temperature of up to 500 ° C. Next, the oxidation products from the reactor 5 are fed to a separator 6, from where methanol is pumped by a pump 7 through line 8 to the gas hydrate zone. Methanol can be served in a vaporous state. Gaseous reaction products are fed through line 9 for combustion in the heat generator 10 to produce thermal energy (FIG. 1) or in a gas turbine power plant 11 (shown in dotted lines in FIG. 2) to produce electrical energy and heat in the electric heat generator 12 (FIG. 2). Burning can be performed simultaneously in the heat generator 10 and in the power plant 11 (figure 3, shown by a dotted line).

Using heat and electric energy (Fig. 3), a high-pressure heat flow is generated from hydrocarbon gas taken through line 13 and pumped through line 14 by compressor 15 to heat generator 10, which is sent through line 16 to the gas hydrate zone. It is possible to supply a heat stream to the gas hydrate zone, consisting of a mixture of gas and methanol, or an aqueous solution of the latter.

The heat flux can be supplied to the zone of gas hydrates with variable temperature, pressure and flow rate, initiating thermobaric waves in this zone, accelerating the destruction of hydrates.

Thermal energy is used in technology, for example, to heat heating water entering heat generators 10 or 12 (Figs. 1-3) along line 17, which is used for technological and domestic needs.

Electric energy is consumed for supplying methanol by pump 7 and for pumping gas by compressor 15 and air by compressor 18.

When drilling a field with several wells 19 (Fig. 4) at a complex gas treatment unit (CCGT) 20, the methanol synthesis reaction and the generation of electric energy are carried out centrally, and heat flows are generated and methanol is supplied to the gas hydrate zone in the places of downhole drilling. For this purpose, a coolant of compressed gas and methanol is supplied to the wells 19 via lines 21.

In a homogeneous oxidation reaction, atmospheric air is used as an oxygen carrier, pumped by compressor 18 via line 22 (FIGS. 1-3) to reactors 5, or / and oxygen produced in electrolyzer 23 from water supplied via line 24.

Hydrogen after the decomposition of water is fed through line 25 (FIGS. 1-3), mixed with gaseous reaction products and burned to produce thermal energy in a heat generator 10 and / or in a power plant 11.

The methanol synthesis reaction is carried out in several stages with cooling of the reaction products before each subsequent stage in heat exchangers 26 to a temperature of the beginning of the reaction of 200 ° C. Cooling is carried out by the gas supplied through line 4 to the reactors 5.

Technological installations in figure 1-3 are equipped with a starting heater 27.

The heat flux 28 (Fig. 5), supplied to the gas hydrate zone 29, is created by heating the heat carrier with electric energy inside the well. Why use electric heaters 30 (Fig.5, 6).

The heat flow is fed into the gas hydrate zone along the length of one or more horizontal or inclined shafts 31 (FIG. 5) of the well located in the gas hydrate zone.

The movement of the coolant along line 21 (Fig. 5) and the discharged hydrocarbon gas and formation fluid is carried out in countercurrent flow along the wellbore 31 cased by a perforated column 32.

In the installation of FIG. 7, in the distillation column apparatus 33, methanol is separated from the formation fluid, which is fed through line 34 and mixed with the synthesized methanol fed through line 8 to the formation.

Excess methanol is sent via line 35 for processing and / or for use as an inhibitor in gas transport.

The implementation of the method is illustrated by examples.

EXAMPLE 1

A method of developing a gas hydrate field includes downhole drilling (FIG. 5), creating a heat stream 28, under the influence of which hydrates decompose in the gas hydrate zone 29 with the release of fluids — hydrocarbon gas and formation fluid. The fluid flow is taken and fed through line 1 to the separator 2 of the installation shown in Fig.1.

The hydrocarbon gas (methane) supplied through line 4 (FIG. 1) is subjected to a non-catalytic reaction of homogeneous oxidation in reactors 5 with atmospheric oxygen and / or oxygen after electric decomposition of water. Air is pumped from the atmosphere by compressor 18 via line 22 to reactors 5. Oxygen, after decomposition of water, is also supplied electrically by line 22 from electrolysis cell 23. Water enters electrolytic cell 23 through line 24.

At start-up, the gas is heated by the starting heater 27 to a temperature of 350 ° C and fed to reactors 5 via line 36. When air is mixed with heated hydrocarbon gas, the latter oxidizes by using catalysts, described by the formula

.

.

During the oxidation of hydrocarbon gas, methanol is synthesized. The reaction proceeds with the release of heat. Therefore, the temperature in the reactor reaches 500 ° C. The reaction is carried out at pressures of 1.0 ÷ 10.0 MPa.

Not more than 3% methanol is synthesized in one step; therefore, to increase the methanol yield, the reaction is carried out in several steps. Figure 1 shows the installation with 4 steps (reactors). Between the reactors 5, heat exchangers 26 are installed, in which the reaction products are cooled to 200 ° C and the hydrocarbon gas supplied through lines 37 is heated to a temperature of 350 ° C. Thus heated gas is supplied via line 38 to reactors 5, and the starting heater 27 is turned off. The reaction proceeds in a self-sustaining mode. The amount of synthesized methanol in four steps is L≈0.9 × 4 × L _i (here 0.9 is the coefficient of incompleteness of the reaction in the subsequent steps, 4 is the number of steps, L _i is the amount of synthesized methanol in the first step).

The specific quantities of substances per 1 kg of synthesized 95% methanol and energy consumption for a 4-step reaction are presented below:

- the amount of hydrocarbon gas - 8.28 kg;

- amount of air - 7.772 kg;

- the amount of reacted hydrocarbon gas is 2.176 kg;

- the amount of exhaust gas - 16.6 nm ³ ;

- the calorific value of the exhaust gas is 22.66 MJ / nm ³ ;

- the amount of heat required to maintain the reaction (recuperative heat) - 5.4 MJ;

- the amount of energy required to compress the air, from atmospheric pressure to 1.0 MPa - 400 kJ.

The synthesized methanol from the separator 6 is fed by a compressor 7 to the gas hydrate zone under a pressure exceeding the reservoir pressure by 0.5 MPa. When this methanol is heated to a vapor state in the heater 10.

The heater 10 burns off-gases and hydrogen supplied through line 25 from the electrolyzer 23. The amount of heat from the combustion of gases is 366 MJ. The amount of heat transferred to the gas from which the heat flow is generated is 220 MJ. The rest of the heat goes to technological needs, and also amounts to losses.

About 0.647 m ³ hydrates decompose in the reservoir from the action of 1 kg of methanol vapor and heat from the heat flux, and 110 m ^{3 of} hydrocarbon gas is released.

With a plant productivity of 0.1 kg / s, methanol produces 40 thousand m ³ per hour or 350 million m ^{3 of} gas per year.

EXAMPLE 2

In the installation shown in figure 2, the gaseous reaction products and hydrogen after the decomposition of water in the electrolytic cell 23 are supplied respectively through line 9 and line 25 for combustion in a gas turbine power plant 11 to produce electrical energy and thermal energy in an electric heat generator 12.

The amount of electric energy generated by a gas turbine power plant 11 with efficiency 0.35 from the combustion of exhaust gases (reaction per 1 kg of methanol) is 126 MJ. Of these, 400 kJ is used for air compression; 200 kJ - for compression of the gas from which the heat flow is generated, 20 kJ - for injection of methanol, 2000 kJ - for technological needs, the rest of the energy is spent on heating the heat flow, under the influence of which the latter decompose in the gas hydrate zone and 60 m ^{3 of} gas are released .

With a plant capacity of 0.1 kg / s methanol produces 189.2 million m ^{3 of} gas per year.

EXAMPLE 3

In the installation shown in figure 3, methanol is produced. When 1 kg of methanol is generated from the combustion of exhaust reaction gases, about 2 MJ of electric energy is generated in a gas turbine power plant 11, and 217 MJ of thermal energy is generated in a heat generator 10. Electric energy goes to technological needs, including the compression and movement of air and heat flow. Thermal energy is completely transferred to the heat flux and is spent on the decomposition of hydrates. At the same time, 108.5 m ^{3 of} gas is extracted from them.

With a plant productivity of 0.1 kg / s, methanol produces 340 million m ^{3 of} gas per year.

EXAMPLE 4

When drilling a field with several wells (figure 4), the methanol synthesis reaction in the amount of 2 kg / s and the generation of electric energy in the amount of 252 MW are carried out centrally at UKPG 20. 10 MW of electric energy is used for technological needs. The remaining electrical energy is expended in heating in the hydrate wells (Fig. 5). At the same time, 3.7 billion m ^{3 of} gas are produced per year.

EXAMPLE 5

In the installation shown in Fig.7, in a distillation column apparatus 33 methanol is separated from the formation fluid. In the column apparatus 33 receive 92-95% solution of methanol, which contains 5-8% of water. This solution is supplied via line 34 and mixed with the synthesized methanol fed through line 8 to the formation. After their evaporation in the heater 10, this mixture is fed into the zone of gas hydrates. The hydrocarbon gas injected through line 14, after heating in the heater 10, is fed through line 16 to the gas hydrate zone. The supply of a gaseous mixture of water and methanol, as well as hydrocarbon gas, may be carried out separately or jointly.

The heat flow from an aqueous solution of methanol and hydrocarbon gas is supplied to the gas hydrate zone with a variable temperature from 50 to 300 ° C and a pressure from a value exceeding 0.5 MPa pressure in the zone of gas hydrates to a value of 10.0-15, MPa and flow rate from 100% (nominal) to 10% of nominal.

The heat flow is fed into the gas hydrate zone to the length of one or more horizontal or inclined wellbores 31 (Fig. 5) of the well located in the gas hydrate zone 28. The heat carrier is moved along line 21 (Fig. 5) and the discharged hydrocarbon gas and reservoir fluid are carried out in countercurrent along the wellbore 31 cased by a perforated string 32.

With a plant productivity of 1 kg / s in methanol and its 30% loss in the formation, 73 m ^{3 of} methanol is accumulated per day, which is injected into the formation. At the same time, due to the circulating methanol, 467,200 nm ^{3 of} gas is produced.

From the action of variable thermal and pressure loads on the gas hydrate zone, an additional 20–27% of gas from hydrates is extracted.

In addition, further accumulated methanol in an amount of about 70 m ³ / day is sent via line 35 for processing. From 1000 kg of methanol on zeolite-containing catalysts, gasoline is produced in an amount of 300 kg with an octane rating of 96.8 (according to the research method).

Claims (14)

1. A method of developing a gas hydrate deposit, including drilling it downhole, creating a heat flux, synthesizing methanol by oxidizing a hydrocarbon gas (methane), contacting a heat flux containing methanol with a zone of gas hydrates, decomposing them, and extracting the hydrocarbon gas and formation liquids, characterized in that the discharged hydrocarbon gas and the formation fluid are separated, methanol synthesis is carried out by oxidation of the hydrocarbon gas (methane) outside the decomposition zone of gas hydrates by directly homogeneous oxidation of a hydrocarbon gas described by the formula

,
at the same time, methanol is fed into the gas hydrate zone, and the gaseous reaction products are burned to produce thermal and / or electric energies, with the help of which they create a high-pressure heat flow supplied to the gas hydrate zone, and which are used for technological and / or domestic needs. 2. The method of developing a gas hydrate field according to claim 1, characterized in that when drilling a field with several wells, the methanol synthesis reaction and the generation of electrical energy are carried out centrally, and heat flows are generated and methanol is supplied to the gas hydrate zone at the borehole locations. 3. The method of developing a gas hydrate deposit according to claim 1, characterized in that atmospheric air or / and oxygen is used as an oxygen carrier in the homogeneous oxidation reaction after decomposition of water from the formation fluid by electric means, and hydrogen after decomposition of water is burned to produce thermal and / or electrical energy. 4. The method of developing a gas hydrate field according to claim 1, characterized in that the reaction of a homogeneous oxidation of hydrocarbon gas is carried out at a pressure of up to 10.0 MPa and a temperature of up to 500 ° C. 5. The method of developing a gas hydrate field according to claim 1, characterized in that the reaction of the homogeneous oxidation of hydrocarbon gas is carried out in several stages with cooling of the reaction products before each subsequent stage to the temperature at which the reaction begins. 6. The method of developing a gas hydrate field according to claim 1, characterized in that methanol is fed into the gas hydrate zone in a vapor state. 7. The method of developing a gas hydrate deposit according to claim 1, characterized in that when creating the heat flux, hydrocarbon gas obtained after liquid separation is used as a heat carrier. 8. The method of developing a gas hydrate deposit according to claim 1, characterized in that when creating the heat flow, a mixture of hydrocarbon gas obtained after separation of the liquid and methanol or an aqueous solution of the latter is used as a heat carrier. 9. The method of developing a gas hydrate field according to claim 1, characterized in that when creating a heat flux, the coolant is heated with electricity inside the well. 10. The method of developing a gas hydrate field according to claim 1, characterized in that the heat flux is supplied to the gas hydrate zone with variable temperature, pressure and flow. 11. The method of developing a gas hydrate field according to claim 1, characterized in that the heat flow is supplied to the gas hydrate zone along the length of one or more horizontal or inclined wellbores located in the gas hydrate zone. 12. The method of developing a gas hydrate field according to claim 1, characterized in that the transfer of the coolant and the discharged hydrocarbon gas and reservoir fluid is carried out in countercurrent flow along the wellbore. 13. The method of developing a gas hydrate field according to claim 1, characterized in that methanol is separated from the formation fluid, which is mixed with the synthesized methanol supplied to the gas hydrate zone. 14. The method of developing a gas hydrate field according to claim 1, characterized in that the excess methanol is sent for processing and / or for use as an inhibitor in gas transport.

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