Combustible ice and terrestrial heat collaborative development and utilization system and method

Abstract

The invention provides a combustible ice and geothermal collaborative development and utilization system and method, and the system comprises an exploitation platform; the geothermal well is used for introducing a circulating heat storage medium, and the heat storage medium is used for transmitting heat in the geothermal layer into the mining platform and heating the combustible ice layer; the gas well is used for transmitting decomposed gas generated in the combustible ice layer into the exploitation platform; and the pressure regulating device is used for controlling the pressure change rate of the combustible ice layer to be kept below a rate threshold value. According to the combustible ice and terrestrial heat collaborative development and utilization system and method, heat exploited in the terrestrial heat layer is used for heating combustible ice in the combustible ice layer, heating energy consumption of the combustible ice layer is omitted, and therefore the exploiting cost of the combustible ice is effectively reduced, in addition, the pressure change rate of the combustible ice layer is controlled to be kept below the rate threshold value, and the exploiting efficiency of the combustible ice layer is improved. And the risk of occurrence of disasters such as submarine landslide and earthquake is greatly reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of combustible ice development, and in particular to a system and method for the coordinated development and utilization of combustible ice and geothermal energy. Background Art

[0002] Methane hydrate is a crystalline compound of water and natural gas, containing a large amount of methane, making it an environmentally friendly, pollution-free, and clean energy source. Existing methods for extracting methane hydrate involve heating, where steam, hot water, or surface seawater is pumped from the surface through pipes into the methane hydrate layer. Electromagnetic waves or microwaves are then used to generate heat, which raises the temperature of the methane hydrate layer, ultimately decomposing the natural gas hydrates and producing natural gas. However, heating the methane hydrate layer consumes a lot of energy, resulting in high mining costs. Furthermore, the rapid pressure changes associated with the production of natural gas in the methane hydrate layer can make it more susceptible to disasters such as submarine landslides and earthquakes, making the extraction of methane hydrate less safe. Summary of the Invention

[0003] The present disclosure aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, the purpose of the present disclosure is to provide a system and method for the coordinated development and utilization of methane hydrate and geothermal energy.

[0005] To achieve the above-mentioned objectives, the first aspect of the present disclosure provides a system for the coordinated development and utilization of combustible ice and geothermal energy, comprising: a mining platform, which is arranged on the sea surface; a geothermal well, which is arranged between the mining platform and the geothermal layer on the seabed, and the geothermal well penetrates the combustible ice layer on the seabed, the geothermal well is used to pass a circulating heat storage medium, and the heat storage medium is used to transfer heat from the geothermal layer to the mining platform and heat the combustible ice layer; a gas well, which is arranged between the mining platform and the combustible ice layer, and the gas well is used to transfer decomposition gas generated in the combustible ice layer to the mining platform; a pressure regulating device, which is connected to the gas well and is used to control the pressure change rate of the combustible ice layer to remain below a rate threshold.

[0006] Optionally, the geothermal well includes: a first pipeline, the first end of the first pipeline is arranged in the geothermal layer, and the second end of the first pipeline is arranged in the mining platform, and the first pipeline passes through the combustible ice layer; a second pipeline, the first end of the second pipeline is arranged in the mining platform, and the second end of the second pipeline is arranged in the geothermal layer and connected to the first end of the first pipeline; a booster device, the booster device is arranged on the mining platform, and the input end of the booster device is connected to the second end of the first pipeline, and the output end of the booster device is connected to the first end of the second pipeline; wherein the heat storage medium is arranged in the first pipeline and the second pipeline, and the booster device is used to pressurize and transport the heat storage medium so that the heat storage medium circulates in the first pipeline and the second pipeline.

[0007] Optionally, the first pipe is sleeved on the second pipe, and a liquid return channel is formed between the inner wall of the first pipe and the outer wall of the second pipe.

[0008] Optionally, the first pipeline includes: a heating section, the heating section passes through the combustible ice layer, and the diameter of the heating section is larger than the diameter of the first pipeline.

[0009] Optionally, the gas well includes: a third pipeline, a first end of the third pipeline is arranged in the combustible ice layer, and a second end of the third pipeline is arranged in the mining platform; a fourth pipeline, a first end of the fourth pipeline is arranged in the mining platform and connected to the output end of the pressure regulating device, and a second end of the fourth pipeline is arranged in the combustible ice layer; wherein the pressure regulating device is used to transport pressure-regulating gas to the fourth pipeline to keep the pressure change rate of the combustible ice layer below a rate threshold.

[0010] Optionally, the third pipe is sleeved on the fourth pipe, and a gas transmission channel is formed between the inner wall of the third pipe and the outer wall of the fourth pipe.

[0011] Optionally, the pressure regulating gas is carbon dioxide.

[0012] Optionally, the pressure regulating gas is nitrogen.

[0013] A second aspect of the present disclosure provides a method for the coordinated development and utilization of combustible ice and geothermal energy, comprising: circulating a heat storage medium between a mining platform on the sea surface and a geothermal layer on the seabed, so as to transfer heat from the geothermal layer to the mining platform using the heat storage medium; passing the circulating heat storage medium through the combustible ice layer on the seabed, so as to heat the combustible ice layer using the heat in the heat storage medium; transferring decomposition gas generated in the combustible ice layer to the mining platform, and controlling the pressure change rate of the combustible ice layer to remain below a rate threshold.

[0014] Optionally, controlling the pressure change rate of the combustible ice layer to remain below a rate threshold includes: collecting the pressure in the combustible ice layer and obtaining the pressure change rate based on the pressure in the combustible ice layer; comparing the pressure change rate of the combustible ice layer with a preset rate threshold; when the pressure change rate of the combustible ice layer exceeds the rate threshold, delivering pressure-regulating gas into the combustible ice layer to reduce the pressure change rate of the combustible ice layer to below the rate threshold.

[0015] The technical solutions provided by the present disclosure may have the following beneficial effects:

[0016] The system uses the heat extracted from the geothermal layer to heat the combustible ice in the combustible ice layer, which not only realizes the coordinated development and utilization of combustible ice and geothermal energy, thereby effectively improving the efficiency of resource extraction, but also saves the heating energy consumption of the combustible ice layer, thereby effectively reducing the mining cost of combustible ice. In addition, the pressure regulating device controls the pressure change rate of the combustible ice layer to remain below the rate threshold, avoiding rapid pressure changes in the combustible ice layer, thereby greatly reducing the risk of disasters such as submarine landslides and earthquakes, and thus effectively improving the safety of combustible ice mining.

[0017] Additional aspects and advantages of the present disclosure will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0019] Figure 1 This is a schematic diagram of the structure of a system for the coordinated development and utilization of combustible ice and geothermal energy proposed in one embodiment of the present disclosure;

[0020] Figure 2 This is a schematic diagram of the structure of a geothermal well in a system for the coordinated development and utilization of combustible ice and geothermal energy, as proposed in one embodiment of the present disclosure;

[0021] Figure 3 This is a schematic diagram of the structure of a gas well in a system for the coordinated development and utilization of combustible ice and geothermal energy, as proposed in one embodiment of the present disclosure;

[0022] Figure 4 This is a flow chart of a method for collaborative development and utilization of combustible ice and geothermal energy proposed in one embodiment of the present disclosure;

[0023] As shown in the figure: 1. Mining platform;

[0024] 2. Geothermal well, 21. First pipeline, 211. Heating section, 22. Second pipeline, 23. Liquid return channel;

[0025] 3. Gas well, 31. Third pipeline, 32. Fourth pipeline, 33. Gas transmission channel;

[0026] 4. Geothermal layer, 5. Combustible ice layer. DETAILED DESCRIPTION

[0027] The following describes in detail embodiments of the present disclosure, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present disclosure and are not to be construed as limiting the present disclosure. On the contrary, the embodiments of the present disclosure include all variations, modifications, and equivalents that fall within the spirit and scope of the appended claims.

[0028] like Figure 1 As shown, the embodiment of the present disclosure proposes a system for the coordinated development and utilization of combustible ice and geothermal energy, including: a mining platform 1, a geothermal well 2, a gas well 3 and a pressure regulating device (not shown in the figure), the mining platform 1 is set on the sea surface, the geothermal well 2 is set between the mining platform 1 and the geothermal layer 4 on the seabed, and the geothermal well 2 penetrates the combustible ice layer 5 on the seabed, the geothermal well 2 is used to pass a circulating heat storage medium, the heat storage medium is used to transfer heat in the geothermal layer 4 to the mining platform 1, and to heat the combustible ice layer 5, the gas well 3 is set between the mining platform 1 and the combustible ice layer 5, and the gas well 3 is used to transfer the decomposition gas generated in the combustible ice layer 5 to the mining platform 1, the pressure regulating device is connected to the gas well 3, and the pressure regulating device is used to control the pressure change rate of the combustible ice layer 5 to remain below the rate threshold.

[0029] It can be understood that since the geothermal well 2 is arranged between the mining platform 1 and the geothermal layer 4 on the seabed, and the geothermal well 2 passes through the combustible ice layer 5 on the seabed, when the circulating heat storage medium is introduced into the geothermal well 2, the heat storage medium can transfer the heat in the geothermal layer 4 to the mining platform 1, thereby realizing the mining of geothermal heat in the geothermal layer 4, and when the heat storage medium passes through the combustible ice layer 5, the heat transferred by the heat storage medium can also be conducted to the combustible ice layer 5, thereby realizing the heating and decomposition of the combustible ice in the combustible ice layer 5. At the same time, since the gas well 3 is arranged between the mining platform 1 and the combustible ice layer 5, the decomposition gas generated by the combustible ice layer 5 can be transferred to the mining platform 1 using the gas well 3, thereby realizing the mining of the combustible ice in the combustible ice layer 5.

[0030] Therefore, the system uses the heat mined from the geothermal layer 4 to heat the combustible ice in the combustible ice layer 5, which not only realizes the coordinated development and utilization of combustible ice and geothermal energy, thereby effectively improving the resource mining efficiency, but also saves the heating energy consumption of the combustible ice layer 5, thereby effectively reducing the mining cost of combustible ice. In addition, the pressure regulating device controls the pressure change rate of the combustible ice layer 5 to remain below the rate threshold, avoiding rapid pressure changes in the combustible ice layer 5, thereby greatly reducing the risk of disasters such as submarine landslides and earthquakes, and thus effectively improving the mining safety of combustible ice.

[0031] It should be noted that combustible ice, scientifically known as natural gas hydrate, is a crystalline substance formed by gas molecules (primarily methane) and water molecules under low temperature and high pressure. Combustible ice resembles ice and snow, but it burns when exposed to fire, hence the name "combustible ice." It is also known as "gas ice" or "solid gas." Combustible ice exists in nature in various forms, including blocks, layers, and lenses, and is primarily found in deep-sea sediments and permafrost on land.

[0032] Among them, there are geothermal layers 4, combustible ice layers 5, etc. distributed on the seabed. For the scenario where the geothermal layer 4 is located below the combustible ice layer 5, it is convenient to penetrate the geothermal well 2 through the combustible ice layer 5 while exploiting geothermal energy.

[0033] The mining platform 1 is used for collecting and transporting geothermal energy and methane hydrate. The specific type of the mining platform 1 can be set according to actual needs and is not limited to this. The mining platform 1 can float on the sea surface or be fixed on the sea surface using a foundation such as a pile foundation.

[0034] The geothermal well 2 is used to introduce a circulating heat storage medium to utilize the heat storage medium to transfer the geothermal heat in the geothermal layer 4 to the mining platform 1, and to heat the combustible ice in the combustible ice layer 5. The specific type of the geothermal well 2 can be set according to actual needs and is not limited to this.

[0035] The heat storage medium is used to store and release thermal energy. When the heat storage medium is located in the geothermal layer 4, the heat storage medium absorbs the geothermal energy in the geothermal layer 4. When the heat storage medium is located in the combustible ice layer 5 and the mining platform 1, the heat storage medium releases the stored heat. The specific type of the heat storage medium can be set according to actual needs and is not limited to this. For example, the heat storage medium can be water.

[0036] The gas well 3 is used to transmit the decomposition gas generated in the combustible ice layer 5 to the mining platform 1. The specific type of the gas well 3 can be set according to actual needs and is not limited to this.

[0037] The pressure regulating device is used to control the pressure change rate of the combustible ice layer 5 to remain below the rate threshold. The specific type of the pressure regulating device can be set according to actual needs and is not limited to this.

[0038] like Figure 2 As shown, in some embodiments, the geothermal well 2 includes: a first pipeline 21, a second pipeline 22, and a pressurizing device (not shown). The first end of the first pipeline 21 is disposed in the geothermal layer 4, and the second end of the first pipeline 21 is disposed in the mining platform 1. The first pipeline 21 penetrates the combustible ice layer 5. The first end of the second pipeline 22 is disposed in the mining platform 1, and the second end of the second pipeline 22 is disposed in the geothermal layer 4 and connected to the first end of the first pipeline 21. The pressurizing device is disposed on the mining platform 1, and the input end of the pressurizing device is connected to the second end of the first pipeline 21, and the output end of the pressurizing device is connected to the first end of the second pipeline 22. A heat storage medium is disposed in the first pipeline 21 and the second pipeline 22, and the pressurizing device is used to pressurize and transport the heat storage medium so that the heat storage medium circulates in the first pipeline 21 and the second pipeline 22.

[0039] It can be understood that since the input end of the boosting device is connected to the second end of the first pipe 21, and the output end of the boosting device is connected to the first end of the second pipe 22, the heat storage medium can be transported in the first pipe 21 along the direction from the first end to the second end of the first pipe 21 under the boosting action of the boosting device, and can be transported in the second pipe 22 along the direction from the first end to the second end of the second pipe 22. At the same time, since the second end of the second pipe 22 is set in the geothermal layer 4 and is connected to the first end of the first pipe 21, the heat storage medium can be continuously circulated in the first pipe 21 and the second pipe 22.

[0040] Since the first end of the first pipeline 21 is set in the geothermal layer 4, and the second end of the first pipeline 21 is set in the mining platform 1, the first pipeline 21 passes through the combustible ice layer 5, so that when the heat storage medium is transported in the first pipeline 21 along the direction from the first end to the second end of the first pipeline 21, the geothermal heat in the geothermal layer 4 can be transferred to the mining platform 1, and the combustible ice in the combustible ice layer 5 can also be heated; since the first end of the second pipeline 22 is set in the mining platform 1, and the second end of the second pipeline 22 is set in the geothermal layer 4, when the heat storage medium is transported in the second pipeline 22 along the direction from the first end to the second end of the second pipeline 22, the geothermal heat in the geothermal layer 4 can be re-absorbed, thereby realizing the cyclic mining of geothermal heat.

[0041] It should be noted that the first pipeline 21 is used to transport the heat storage medium from the geothermal layer 4 to the mining platform 1, and to allow the heat storage medium to pass through the combustible ice layer 5. The specific type of the first pipeline 21 can be set according to actual needs and is not limited to this. For example, the first pipeline 21 is a pipe structure, and the layout of the first pipeline 21 involves the sea surface, the seabed, the geothermal layer 4 and the combustible ice layer 5.

[0042] The second pipeline 22 is used to transport the heat storage medium from the mining platform 1 to the geothermal layer 4. The specific type of the second pipeline 22 can be set according to actual needs and is not limited to this. For example, the second pipeline 22 is a pipe structure, and the layout of the second pipeline 22 involves the sea surface, the seabed and the geothermal layer 4.

[0043] The boosting device is used to pressurize and transport the heat storage medium so that the heat storage medium circulates in the first pipe 21 and the second pipe 22. The specific type of the boosting device can be set according to actual needs and is not limited to this. For example, the boosting device can be a water pump.

[0044] like Figure 2 As shown, in some embodiments, the first pipe 21 is sleeved on the second pipe 22 , and a liquid return channel 23 is formed between the inner wall of the first pipe 21 and the outer wall of the second pipe 22 .

[0045] It can be understood that since the first pipe 21 is sleeved on the second pipe 22, and a return liquid channel 23 is formed between the inner wall of the first pipe 21 and the outer wall of the second pipe 22, the first pipe 21 and the second pipe 22 can realize the circulation of the heat storage medium, while making the geothermal well 2 have a higher degree of integration and a smaller volume, thereby making the transportation and disassembly of the geothermal well 2 more convenient, thereby effectively improving the mining efficiency of combustible ice and geothermal energy, and reducing the mining cost of combustible ice and geothermal energy.

[0046] It should be noted that when the first pipe 21 is sleeved on the second pipe 22, the first end of the second pipe 22 can pass through the pipe wall of the first pipe 21 and be connected to the output end of the boosting device, while the input end of the boosting device is directly connected to the second end of the first pipe 21.

[0047] In order to reduce the heat exchange of the heat storage medium between the first pipe 21 and the second pipe 22, the second pipe 22 can be set to a sandwich structure, and a heat insulating material is provided in the sandwich.

[0048] like Figure 2 As shown, in some embodiments, the first pipe 21 includes: a heating section 211 , the heating section 211 passes through the combustible ice layer 5 , and the diameter of the heating section 211 is greater than the diameter of the first pipe 21 .

[0049] It can be understood that since the heating section 211 passes through the combustible ice layer 5, the heat storage medium in the first pipeline 21 can heat the combustible ice layer 5 when passing through the heating section 211, thereby realizing the mining of combustible ice. At the same time, since the diameter of the heating section 211 is larger than the diameter of the first pipeline 21, there is a larger heat exchange area between the first pipeline 21 and the combustible ice layer 5, thereby effectively improving the mining efficiency of the combustible ice layer 5.

[0050] It should be noted that the heating section 211 is the part of the first pipe 21 located in the combustible ice layer 5, which is used to heat the combustible ice layer 5. The specific type of the heating section 211 can be set according to actual needs and is not limited to this. For example, the heating section 211 can be a tubular structure that is close to a spherical shape.

[0051] like Figure 3 As shown, in some embodiments, gas well 3 includes: a third pipeline 31 and a fourth pipeline 32. The first end of third pipeline 31 is disposed in combustible ice layer 5, and the second end of third pipeline 31 is disposed in mining platform 1. The first end of fourth pipeline 32 is disposed in mining platform 1 and connected to the output end of the pressure regulating device, and the second end of fourth pipeline 32 is disposed in combustible ice layer 5. The pressure regulating device is used to deliver pressure-regulated gas to fourth pipeline 32 to keep the pressure change rate of combustible ice layer 5 below a rate threshold.

[0052] It can be understood that since the first end of the third pipeline 31 is set in the combustible ice layer 5 and the second end of the third pipeline 31 is set in the mining platform 1, the decomposition gas generated in the combustible ice layer 5 can be transmitted to the mining platform 1 using the third pipeline 31, thereby realizing the mining of combustible ice. In addition, since the first end of the fourth pipeline 32 is set in the mining platform 1 and connected to the output end of the pressure regulating device, and the second end of the fourth pipeline 32 is set in the combustible ice layer 5, the pressure regulating device can use the fourth pipeline 32 to transport pressure-regulating gas to the combustible ice layer 5, thereby using the pressure-regulating gas to adjust the pressure change rate of the combustible ice layer 5 to ensure stable mining of combustible ice.

[0053] It should be noted that the third pipeline 31 is used to transmit the decomposition gas generated in the combustible ice layer 5 to the mining platform 1. The specific type of the third pipeline 31 can be set according to actual needs and is not limited to this. For example, the third pipeline 31 is a pipe structure, and the layout of the third pipeline 31 involves the sea surface, the seabed and the combustible ice layer 5.

[0054] The fourth pipeline 32 is used to transmit decomposition gas to the combustible ice layer 5. The specific type of the fourth pipeline 32 can be set according to actual needs and is not limited to this. For example, the fourth pipeline 32 is a pipe structure, and the layout of the fourth pipeline 32 involves the sea surface, the seabed and the combustible ice layer 5.

[0055] like Figure 3 As shown, in some embodiments, the third pipe 31 is sleeved on the fourth pipe 32 , and a gas transmission channel 33 is formed between the inner wall of the third pipe 31 and the outer wall of the fourth pipe 32 .

[0056] It can be understood that since the third pipeline 31 is mounted on the fourth pipeline 32, and a gas transmission channel 33 is formed between the inner wall of the third pipeline 31 and the outer wall of the fourth pipeline 32, the third pipeline 31 can realize the decomposition gas transmission and the fourth pipeline 32 can realize the pressure-regulated gas transmission, while making the gas well 3 have a higher degree of integration and a smaller volume, so that the transportation and disassembly of the gas well 3 are more convenient, thereby effectively improving the mining efficiency of combustible ice and reducing the mining cost of combustible ice.

[0057] In some embodiments, the pressure regulating gas is carbon dioxide.

[0058] It can be understood that the pressure regulating device uses the fourth pipeline 32 to transport carbon dioxide into the combustible ice layer 5, thereby using carbon dioxide to adjust the pressure change rate of the combustible ice layer 5 to ensure stable mining of combustible ice.

[0059] In some embodiments, the pressure regulating gas is nitrogen.

[0060] It can be understood that the pressure regulating device uses the fourth pipeline 32 to transport nitrogen into the combustible ice layer 5, thereby using nitrogen to adjust the pressure change rate of the combustible ice layer 5 to ensure stable mining of combustible ice.

[0061] It should be noted that both carbon dioxide and nitrogen can be effectively charged into the combustible ice layer 5 without causing any negative impact on the mining of combustible ice.

[0062] like Figure 4 As shown, the embodiment of the present disclosure also proposes a method for the coordinated development and utilization of combustible ice and geothermal energy, including:

[0063] S1: circulate the heat storage medium between the mining platform 1 on the sea surface and the geothermal layer 4 on the seabed, so as to transfer the heat in the geothermal layer 4 to the mining platform 1 by using the heat storage medium;

[0064] S2: passing the circulating heat storage medium through the combustible ice layer 5 on the seabed to heat the combustible ice layer 5 using the heat in the heat storage medium;

[0065] S3: The decomposition gas generated in the combustible ice layer 5 is transmitted to the mining platform 1, and the pressure change rate of the combustible ice layer 5 is controlled to be kept below the rate threshold.

[0066] It can be understood that since the heat storage medium circulates between the mining platform 1 on the sea surface and the geothermal layer 4 on the seabed, the heat storage medium can transfer the heat in the geothermal layer 4 to the mining platform 1, thereby realizing the mining of geothermal energy in the geothermal layer 4, and since the circulating heat storage medium passes through the combustible ice layer 5 on the seabed, the heat transferred by the heat storage medium can also be conducted to the combustible ice layer 5, thereby realizing the heating and decomposition of the combustible ice in the combustible ice layer 5, thereby transmitting the decomposition gas generated in the combustible ice layer 5 to the mining platform 1, thereby realizing the mining of the combustible ice in the combustible ice layer 5.

[0067] The method utilizes the heat mined from the geothermal layer 4 to heat the combustible ice in the combustible ice layer 5, which not only realizes the coordinated development and utilization of combustible ice and geothermal energy, thereby effectively improving the mining efficiency of resources, but also saves the heating energy consumption of the combustible ice layer 5, thereby effectively reducing the mining cost of the combustible ice. In addition, the pressure change rate of the combustible ice layer 5 is controlled to be below the rate threshold, thereby avoiding rapid pressure changes in the combustible ice layer 5, thereby greatly reducing the risk of disasters such as submarine landslides and earthquakes, and thus effectively improving the mining safety of combustible ice.

[0068] In some embodiments, controlling the pressure change rate of the combustible ice layer 5 to remain below a rate threshold comprises:

[0069] collecting the pressure in the combustible ice layer 5, and obtaining a pressure change rate according to the pressure in the combustible ice layer 5;

[0070] comparing the pressure change rate of the combustible ice layer 5 with a preset rate threshold;

[0071] When the pressure change rate of the combustible ice layer 5 exceeds a rate threshold, pressure-regulating gas is delivered to the combustible ice layer 5 to reduce the pressure change rate of the combustible ice layer 5 to below the rate threshold.

[0072] It can be understood that the pressure change rate is obtained based on the pressure in the combustible ice layer 5, and when the pressure change rate of the combustible ice layer 5 exceeds the rate threshold, pressure-regulating gas is delivered to the combustible ice layer 5 to reduce the pressure change rate of the combustible ice layer 5 to below the rate threshold, thereby avoiding the rapid pressure change of the combustible ice layer 5, thereby greatly reducing the risk of disasters such as submarine landslides and earthquakes, and effectively improving the safety of combustible ice mining.

[0073] It should be noted that the pressure regulating device can be used to realize the collection of pressure in the combustible ice layer 5, the comparison of the pressure change rate and the rate threshold, and the delivery of pressure-regulating gas. Specifically, the pressure regulating device includes: a pressure sensor, an air pump and a controller. The pressure sensor is used to collect the pressure in the combustible ice layer 5. The controller is used to obtain the pressure change rate according to the pressure in the combustible ice layer 5, compare the pressure change rate of the combustible ice layer 5 with the preset rate threshold, and when the pressure change rate of the combustible ice layer 5 exceeds the rate threshold, control the air pump to deliver pressure-regulating gas to the combustible ice layer 5 until the pressure change rate of the combustible ice layer 5 drops below the rate threshold.

[0074] In the description of the present disclosure, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, in the description of the present disclosure, unless otherwise specified, the meaning of "plurality" is two or more.

[0075] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present disclosure includes additional implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present disclosure belong.

[0076] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0077] Although the embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are illustrative and are not to be construed as limitations on the present disclosure. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure.

Claims

1. A system for the coordinated development and utilization of combustible ice and geothermal energy, characterized in that: include: A mining platform, wherein the mining platform is arranged on the sea surface; A geothermal well, wherein the geothermal well is arranged between the mining platform and the geothermal layer on the seabed, and the geothermal well penetrates the combustible ice layer on the seabed, and the geothermal well is used to pass a circulating heat storage medium, and the heat storage medium is used to transfer heat from the geothermal layer to the mining platform and heat the combustible ice layer; A gas well, wherein the gas well is arranged between the mining platform and the combustible ice layer, and the gas well is used to transmit the decomposition gas generated in the combustible ice layer to the mining platform; A pressure regulating device is connected to the gas well and is used to control the pressure change rate of the combustible ice layer to remain below a rate threshold.

2. The combustible ice and geothermal collaborative development and utilization system according to claim 1 is characterized in that: The geothermal well comprises: a first pipeline, wherein a first end of the first pipeline is disposed in the geothermal layer, a second end of the first pipeline is disposed in the mining platform, and the first pipeline passes through the combustible ice layer; a second pipeline, wherein a first end of the second pipeline is disposed in the mining platform, and a second end of the second pipeline is disposed in the geothermal layer and connected to the first end of the first pipeline; a boosting device, the boosting device being disposed on the mining platform, the input end of the boosting device being connected to the second end of the first pipeline, and the output end of the boosting device being connected to the first end of the second pipeline; The heat storage medium is arranged in the first pipe and the second pipe, and the pressurizing device is used to pressurize and transport the heat storage medium so that the heat storage medium circulates in the first pipe and the second pipe.

3. The combustible ice and geothermal collaborative development and utilization system according to claim 2 is characterized in that: The first pipe is sleeved on the second pipe, and a liquid return channel is formed between the inner wall of the first pipe and the outer wall of the second pipe.

4. The combustible ice and geothermal collaborative development and utilization system according to claim 2 is characterized in that: The first pipeline includes: A heating section, wherein the heating section passes through the combustible ice layer, and the diameter of the heating section is larger than the diameter of the first pipe.

5. The combustible ice and geothermal collaborative development and utilization system according to claim 1 is characterized in that: The gas well comprises: a third pipeline, wherein a first end of the third pipeline is disposed in the combustible ice layer, and a second end of the third pipeline is disposed in the mining platform; a fourth pipeline, wherein a first end of the fourth pipeline is disposed in the mining platform and connected to an output end of the pressure regulating device, and a second end of the fourth pipeline is disposed in the combustible ice layer; The pressure regulating device is used to deliver pressure-regulating gas to the fourth pipeline so that the pressure change rate of the combustible ice layer is kept below a rate threshold.

6. The combustible ice and geothermal collaborative development and utilization system according to claim 5 is characterized in that: The third pipe is sleeved on the fourth pipe, and a gas transmission channel is formed between the inner wall of the third pipe and the outer wall of the fourth pipe.

7. The combustible ice and geothermal collaborative development and utilization system according to claim 5 is characterized in that: The pressure regulating gas is carbon dioxide.

8. The combustible ice and geothermal collaborative development and utilization system according to claim 5 is characterized in that: The pressure regulating gas is nitrogen.

9. A method for the coordinated development and utilization of combustible ice and geothermal energy, characterized in that: include: Circulating a heat storage medium between a mining platform on the sea surface and a geothermal layer on the seabed, so as to transfer heat from the geothermal layer to the mining platform using the heat storage medium; Passing the circulating heat storage medium through the combustible ice layer on the seabed to heat the combustible ice layer using the heat in the heat storage medium; The decomposition gas generated in the combustible ice layer is transmitted to the mining platform, and the pressure change rate of the combustible ice layer is controlled to be maintained below a rate threshold.

10. The method for the coordinated development and utilization of combustible ice and geothermal energy according to claim 9, characterized in that: The controlling the pressure change rate of the combustible ice layer to remain below a rate threshold comprises: collecting the pressure in the combustible ice layer, and obtaining a pressure change rate according to the pressure in the combustible ice layer; comparing a pressure change rate of the combustible ice layer with a preset rate threshold; When the pressure change rate of the combustible ice layer exceeds a rate threshold, pressure-regulating gas is delivered to the combustible ice layer to reduce the pressure change rate of the combustible ice layer to below the rate threshold.

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