Deposition structure coupling simulation structure for hydrate reservoir forming and reaction experiment module

Abstract

The utility model discloses a hydrate reservoir-forming sedimentary structure coupling simulation structure and a reaction experiment module, and the inner cavity of the reaction experiment module is provided with the sedimentary structure coupling simulation structure. The sedimentary structure coupling simulation structure comprises a monoclinic sedimentary stratum simulation structure, a sedimentary structure transition simulation structure, a mesh fault simulation structure, a fault anticline simulation structure and a stability domain simulation structure; the net-shaped fault simulation structure is located at the fracture position of the fracture and anticline simulation structure, and the fracture and anticline simulation structure is connected with the net-shaped fault simulation structure; a low-temperature water bath circulation structure in the stability domain simulation structure is arranged in the monoclinic sedimentary stratum simulation structure; the monoclinic sedimentary stratum simulation structure, the sedimentary structure transition simulation structure, the mesh fault simulation structure and the fault anticline simulation structure are all provided with filling particles. The utility model provides a feasible simulation mode aiming at the coupling effect of construction and sedimentary elements under the mainland edge background, a temperature field and a pressure field, and can be widely applied to the technical field of geological exploration.

Description

Technical Field

[0001] This application relates to the field of geological exploration technology, and in particular to a sedimentary tectonic coupling simulation structure and reaction experimental chamber for hydrate accumulation. Background Technology

[0002] Research on experimental simulation devices and methods for hydrate accumulation processes under active continental margin settings, especially under the coupling of tectonic and sedimentary geological elements, is relatively limited. Existing experimental simulation devices and techniques are insufficient for effectively simulating complex tectonic-sedimentary settings.

[0003] On the other hand, existing experimental simulation devices and methods often focus solely on changes in single geological simulation elements such as temperature and pressure when simulating hydrate accumulation. They fail to adequately consider the coupling effects of tectonic and sedimentary elements within an active continental margin context, and their synergistic effects with the spatiotemporal evolution of hydrate stability domains under the constraints of the "temperature-pressure field" condition. This results in limitations in understanding the dynamic accumulation process of hydrates and the spatial distribution patterns of highly saturated hydrates. Furthermore, existing experimental simulation devices typically design the simulated geological structures to be homogeneous and stable, limiting their functional simulation capabilities for hydrate accumulation and evolution under complex regional geological backgrounds and varying tectonic and sedimentary environments. Utility Model Content

[0004] To solve at least one of the above-mentioned technical problems, this application provides a sedimentary tectonic coupling simulation structure and reaction experimental chamber for hydrate accumulation, and the technical solution adopted is as follows.

[0005] The reaction chamber provided in this application has a depositional structure coupling simulation structure installed inside.

[0006] The sedimentary tectonic coupling simulation structure for hydrate accumulation provided in this application includes a monoclinic sedimentary strata simulation structure arranged at an angle, a sedimentary tectonic transition simulation structure arranged at an angle, a network fault simulation structure, a fault-anticline simulation structure, and a stability domain simulation structure. The monoclinic sedimentary strata simulation structure and the network fault simulation structure are connected through the sedimentary tectonic transition simulation structure. The network fault simulation structure is located at the fracture point of the fault-anticline simulation structure and is connected to the network fault simulation structure. The stability domain simulation structure includes a low-temperature water bath circulation structure, which is set in the monoclinic sedimentary strata simulation structure. All of the monoclinic sedimentary strata simulation structure, the sedimentary tectonic transition simulation structure, the network fault simulation structure, and the fault-anticline simulation structure contain filling particles.

[0007] In some embodiments of this application, the inner cavity of the monoclinic sedimentary stratum simulation structure is divided into at least two first chambers by a permeable partition, each of the first chambers containing the filling particles, and the particle size of the filling particles in each of the first chambers is different.

[0008] In some embodiments of this application, the surface of the monoclinic sedimentary stratum simulation structure is provided with at least one guide structure, and the low-temperature water bath circulation structure is movably connected to the guide structure.

[0009] In some embodiments of this application, the low-temperature water bath circulation structure is fitted onto the outside of the monoclinic sedimentary stratum simulation structure.

[0010] In some embodiments of this application, the mesh fault simulation structure includes at least two thermal fluid conduction structures, which are disposed in the inner cavity of the mesh fault simulation structure. The thermal fluid conduction structures are configured as hollow columnar structures, and the inner cavity of each thermal fluid conduction structure contains the filling particles.

[0011] In some embodiments of this application, the mesh fault simulation structure includes at least two resistance heaters disposed on the heat fluid conduction structure, and the resistance heaters heat the heat fluid conduction structure.

[0012] In some embodiments of this application, the inner cavity of the fractured anticline simulation structure is provided with at least two layers of second chambers, and each second chamber contains the filling particles.

[0013] In some embodiments of this application, the particle size of the filling particles in the sedimentary transition simulation structure is larger than that in the monoclinic sedimentary strata simulation structure, but smaller than that in the network fault simulation structure.

[0014] In some embodiments of this application, the tilt angle of the monoclinic sedimentary strata simulation structure is adjustable.

[0015] This application provides a feasible simulation method for the coupling effects of tectonic and sedimentary elements, as well as temperature and pressure fields, in a continental margin setting, which can be widely applied in the field of geological exploration technology. This application has at least the following beneficial effects.

[0016] The sedimentary structure coupling simulation structure is set inside the reaction chamber, which can form a hydraulic environment to control the pressure field conditions of the sedimentary structure coupling simulation structure.

[0017] In the coupled sedimentary structure simulation, the monoclinic sedimentary strata simulation structure is used to simulate the morphological distribution of sedimentary strata in the continental margin area, the network fault simulation structure is used to simulate the efficient fluid conduction channels formed by the tectonic fracturing of sedimentary strata caused by plate subduction in the continental margin area, the sedimentary structure transition simulation structure plays the role of transition between the monoclinic sedimentary strata simulation structure and the network fault simulation structure, and the fault anticline simulation structure is used to simulate the sedimentary deformation of strata caused by tectonic activity in the continental margin area.

[0018] The stable domain simulation structure arranges a low-temperature water bath circulation structure on the surface of the monoclinic sedimentary stratum simulation structure to control the temperature field conditions of the sedimentary tectonic coupled simulation structure.

[0019] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0020] The present application will be further illustrated below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments illustrated in the following drawings are exemplary and are only used to explain the present application, and should not be construed as limiting the present application.

[0021] Figure 1 This is a schematic diagram of the reaction experimental chamber.

[0022] Figure 2 This is a schematic diagram of the structure of the coupled simulation of sedimentary structures.

[0023] Figure 3 This is a schematic diagram of the structural decomposition of a coupled simulation structure of sedimentary structures.

[0024] Figure 4 This is a schematic diagram showing the positional changes of the low-temperature water bath circulation structure on a simulated monoclinic sedimentary stratum.

[0025] Figure 5 This is a schematic diagram of the simulated structure of a broken anticline.

[0026] Figure reference numerals: 1000, reaction experimental chamber; 2000, sedimentary structure coupling simulation structure; 2100, monoclinic sedimentary strata simulation structure; 2200, sedimentary structure transition simulation structure; 2300, network fault simulation structure; 2301, thermal fluid conduction structure; 2302, resistance heater; 2400, faulted anticline simulation structure; 3000, stability domain simulation structure; 3100, low-temperature water bath circulation structure. Detailed Implementation

[0027] The following is combined Figures 1 to 5The embodiments of this application are described in detail below, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0028] In the description of this application, it should be understood that the terms "center", "middle", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0029] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0030] In the description of this application, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] In the description of this application, the use of terms such as "one embodiment," "some embodiments," "an example," "some instances," "some embodiments," "illustrative embodiment," "example," "specific example," and "some examples" indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions 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 one or more embodiments or examples.

[0032] The relevant terms that may be mentioned in this application are explained below.

[0033] Hydrates: Hydrates are mineral crystals formed by the combination of water molecules and gas molecules under low temperature and high pressure conditions. They are mainly found in marine environments or permafrost zones on land and represent a potentially huge clean energy source. In this application, hydrates specifically refer to methane hydrates in marine environments.

[0034] Hydrate stability domain: Hydrates are stable only under specific "low temperature and high pressure" conditions; outside this range, they cannot form or decompose. The hydrate stability domain refers to the physical spatial range within which hydrates stably aggregate under specific temperature and pressure conditions.

[0035] Hydrate reservoirs refer to hydrate accumulation zones formed by the accumulation of natural gas hydrates under specific geological conditions, such as deep-sea sediments or terrestrial permafrost. The formation of hydrate reservoirs is influenced by a variety of geological factors, primarily including stability zone conditions, gas source conditions, reservoir space conditions, fluid migration conditions, and geological tectonic environment. These geological factors interact to jointly determine the formation, distribution, and enrichment characteristics of natural gas hydrates.

[0036] Hydrate saturation: refers to the proportion of hydrate volume to sediment pore space volume. It is an important factor in measuring the exploration and development potential of hydrates. Generally, mineral deposits with higher hydrate saturation have higher commercial development value.

[0037] Acousto-electric characteristics of hydrates: These refer to the distribution characteristics of hydrates in a reservoir as reflected by geophysical records such as sound waves or electrical signals. In hydrate exploration, the spatial distribution of hydrates is often inferred based on parameters such as resistivity, acoustic velocity, shear strength, and density. For hydrate-free gas systems, the higher the hydrate saturation, the higher the resistivity, acoustic velocity, shear strength, and density signals of the reservoir; while gas layers, although having high resistivity, exhibit relatively low acoustic velocity, shear strength, and density signals.

[0038] Leakage hydrates: These hydrates are formed on the ocean floor due to faulting caused by tectonic activity or lateral compression deformation of sedimentary strata. Hydrocarbon gases seep upwards along the fault and gush out in large quantities, stabilizing in the fissures of the sediments under suitable temperature and pressure conditions. These hydrates are characterized by high grade, shallow burial, concentrated distribution, often appearing in massive forms, and relatively high saturation.

[0039] Diffusion-type hydrates: Under suitable temperature and pressure conditions, hydrocarbon gases combine with pore water in the surrounding sediments, gradually forming hydrates within the sediment pores through diffusion. Their formation process is subtle and slow, but their effects are widespread. These hydrates typically occur in muddy sedimentary layers, are relatively dispersed in space, and have low saturation.

[0040] Active continental margins refer to regions where continental and oceanic plates collide and compress, with the oceanic plate subducting beneath the continental plate. These regions are geologically active, often accompanied by earthquakes, volcanic eruptions, and deep, high-temperature, gas-bearing hydrothermal activity.

[0041] Passive continental margins refer to regions where continental and oceanic plates are located within the same rigid lithospheric plate and do not interact strongly. Tectonic activity in passive continental margin regions is relatively calm, with a lack of frequent earthquakes and volcanic eruptions, and weak activity of deep, high-temperature, gas-bearing hydrothermal fluids.

[0042] Fluid transport channels: In geological environments, deep strata are often disrupted by tectonic activity or overpressure, forming a series of fluid transport channels. Formation fluids typically migrate along these channels to shallower layers and accumulate as hydrates in areas with suitable temperature and pressure conditions.

[0043] Tectonic faults are geological phenomena in which sedimentary strata fracture due to geological stress, resulting in significant relative displacement along the fault plane. Tectonic faults typically have good fluid permeability, serving as advantageous channels for the migration of deep gas-bearing fluids to shallower layers.

[0044] Faulted anticlines: Under tectonic activity, sedimentary strata bend and deform, arching upwards to form an anticline shape. Faulting further disrupts the deformation of these strata. This unique structure creates favorable conditions for the migration and accumulation of fluids such as oil and natural gas, making it significant for the exploration of oil, gas, and natural gas hydrate resources.

[0045] This application relates to a reaction experimental chamber 1000 for hydrate accumulation. The inner cavity of the reaction experimental chamber 1000 is provided with a sedimentation structure coupling simulation structure 2000, and liquid is injected into the inner cavity of the reaction experimental chamber 1000 to form a hydraulic environment.

[0046] As a key load-bearing structure for the simulation experiment, the reaction chamber 1000 adopts a steel cavity structure design. The pressure bearing range of the steel cavity structure of the reaction chamber 1000 is 15MPa to 30MPa, corresponding to a simulated water depth range of 1500 meters to 3000 meters. It can simulate the hydrostatic pressure environment of hydrate occurrence areas, providing experimental simulation conditions close to real geological scenarios, which helps to ensure the accuracy and reliability of experimental results.

[0047] This application relates to a sedimentary tectonic coupling simulation structure 2000 for hydrate accumulation. The sedimentary tectonic coupling simulation structure 2000 includes a monoclinic sedimentary strata simulation structure 2100, a sedimentary tectonic transition simulation structure 2200, a network fault simulation structure 2300, and a faulted anticline simulation structure 2400. The monoclinic sedimentary strata simulation structure 2100 and the network fault simulation structure 2300 are connected by the sedimentary tectonic transition simulation structure 2200. The network fault simulation structure 2300 is located at the fracture of the faulted anticline simulation structure 2400, and the faulted anticline simulation structure 2400 is connected to the network fault simulation structure 2300.

[0048] The simulated monoclinic sedimentary strata structure 2100, the simulated sedimentary tectonic transition structure 2200, the simulated network fault structure 2300, and the simulated faulted anticline structure 2400 all contain infill particles. Specifically, the infill particles are quartz sand particles or ceramic particles.

[0049] This application fully considers the tectonic-sedimentary coupling process under the background of active continental margin, and specifically designs functional modules such as monoclinic sedimentary strata simulation structure 2100, sedimentary tectonic transition simulation structure 2200, network fault simulation structure 2300, and fault anticline simulation structure 2400 to carry out differential simulation analysis of deep tectonic fluid activity and shallow sedimentary lithological changes, thereby realizing the effective simulation of the dynamic evolution process of hydrates under complex geological backgrounds and changes in tectonic and sedimentary conditions.

[0050] The monoclinic sedimentary strata simulation structure 2100, the sedimentary tectonic transition simulation structure 2200, the network fault simulation structure 2300, and the fault anticline simulation structure 2400 are independent of each other, but they are connected by their structures to form a systematic and complete experimental simulation device system.

[0051] The monoclinic sedimentary strata simulation structure 2100 is arranged at an angle and is located above the sedimentary tectonic coupling simulation structure 2000. The monoclinic sedimentary strata simulation structure 2100 is used to simulate the morphological distribution of sedimentary strata in continental margin areas. The interior of the monoclinic sedimentary strata simulation structure 2100 is filled with quartz sand or ceramic particles to simulate changes in reservoir structure and physical properties such as porosity and permeability caused by variations in sediment lithology and grain size rhythm in a real marine environment under an active continental margin background. Furthermore, the monoclinic sedimentary strata simulation structure 2100 can also be used to simulate changes in sedimentary rhythm caused by progradation or retrogradation due to sea-level rise and fall, making the simulated sedimentary reservoir conditions more closely resemble actual geological conditions.

[0052] The sedimentary tectonic transition simulation structure 2200 is designed with a long axis shape and is located in the middle of the sedimentary tectonic coupling simulation structure 2000. It plays a key role in the transition between the monoclinic sedimentary strata simulation structure 2100 and the network fault simulation structure 2300. The interior of the sedimentary tectonic transition simulation structure 2200 is filled with quartz sand particles or ceramic particles, which can better realize the transitional function of the sedimentary tectonic transition simulation structure 2200 in the simulation experiment.

[0053] The network fault simulation structure 2300 is arranged at an angle and is located below the sedimentary tectonic coupling simulation structure 2000. The network fault simulation structure 2300 is used to simulate the efficient fluid conduction channels formed by tectonic fracturing of sedimentary strata due to plate subduction in an active continental margin setting. It can simulate the significant control of tectonic activity on sedimentary strata deformation. Quartz sand or ceramic particles are used as filler particles in the network fault simulation structure 2300 to simulate good sedimentary reservoir connectivity and fluid permeability, thus matching the good fluid conduction capacity of tectonic fault channels under real geological conditions.

[0054] The faulted anticline simulation structure 2400 is located below the sedimentary tectonic coupling simulation structure 2000. The faulted anticline simulation structure 2400 is used to simulate the sedimentary deformation of strata caused by tectonic activity in the context of an active continental margin.

[0055] In some implementations, the tilt angle of the monoclinic sedimentary strata simulation structure 2100 is adjustable to match the specific conditions of the dip angle of sedimentary strata in different continental margins or geological backgrounds.

[0056] Specifically, the sedimentary tectonic transition simulation structure 2200 is configured as a long axis structure arranged horizontally, and the monoclinic sedimentary stratum simulation structure 2100 uses the sedimentary tectonic transition simulation structure 2200 as a rotation axis, thereby enabling adjustment of the dip angle of the monoclinic sedimentary stratum simulation structure 2100 relative to the horizontal plane. Furthermore, the dip angle of the monoclinic sedimentary stratum simulation structure 2100 can be adjusted automatically or manually.

[0057] In some implementations, the particle size of the filling particles in the sedimentary tectonic transition simulation structure 2200 is larger than that of the filling particles in the monoclinic sedimentary stratum simulation structure 2100, but smaller than that of the filling particles in the network fault simulation structure 2300. This ensures that the porosity and permeability of the simulated reservoir in the sedimentary tectonic transition simulation structure 2200 are between those of the monoclinic sedimentary stratum simulation structure and the network fault simulation structure 2300, making the reservoir simulation environment closer to the real geological environment under an active continental margin background.

[0058] In some implementations, to meet the experimental simulation requirements of multiple geological scenarios, the inner cavity of the monoclinic sedimentary stratum simulation structure 2100 is divided into at least two first chambers by permeable partitions, and each first chamber contains filling particles.

[0059] Furthermore, the particle size of the filling particles in each of the first chambers is different.

[0060] In some embodiments, the network fault simulation structure 2300 includes at least two thermal fluid conduction structures 2301, which simulate the dominant conduction channels for gas-bearing fluids from deep formations to shallower layers.

[0061] Specifically, the thermal fluid conduction structure 2301 is disposed in the inner cavity of the mesh fault simulation structure 2300. The thermal fluid conduction structure 2301 is configured as a hollow columnar structure, and the inner cavity of each thermal fluid conduction structure 2301 is filled with particles.

[0062] Furthermore, the network fault simulation structure 2300 includes at least two resistance heaters 2302, which are disposed on the thermal fluid conduction structure 2301. The resistance heaters 2302 heat the thermal fluid conduction structure 2301, thereby effectively simulating the heat transfer effect during the process of deep gas-bearing fluids being conducted and transported to shallow layers, and realizing the effective simulation of the migration process of high-temperature gas-bearing fluids from deep sources driven by tectonic activity under real geological conditions.

[0063] In some examples, the resistance heater 2302 is embedded in the sidewall of the heat flow conduction structure 2301 to improve thermal conductivity.

[0064] It should be noted that the resistance heater 2302 can accurately simulate and control the temperature field of the simulated strata under different tectonic fluid activity conditions in the background of active continental margins by adjusting the heating power.

[0065] In some embodiments, the cavity of the fractured anticline simulation structure 2400 is provided with at least two layers of second chambers, each of which contains filling particles.

[0066] Furthermore, the particle size of the filling particles in each of the second chambers is different.

[0067] In some examples, the fault anticline simulation structure 2400 and the network fault simulation structure 2300 are detachably connected so that the fault anticline simulation structure 2400 and the network fault simulation structure 2300 can not only be connected to form a combined structure, but also be disassembled into independent modules.

[0068] This application presents a sedimentary-tectonic coupling simulation structure designed for the special geological background of active continental margins. It emphasizes the constraints of deep tectonic activity on the migration of gas-bearing fluids and the formation and evolution of hydrates, making the simulation conditions closely resemble the actual underground geological conditions and improving the simulation similarity.

[0069] It should be noted that the sedimentary structure coupling simulation structure 2000 also includes the stable domain simulation structure 3000. The stable domain simulation structure 3000 is mainly used to control the temperature environment of the sedimentary structure coupling simulation structure 2000. The purpose is to simulate the stratigraphic temperature field environment of hydrate-rich areas under real geological conditions, and to provide temperature conditions close to the real geological environment for studying the evolution of hydrate accumulation.

[0070] Specifically, the stability domain simulation structure 3000 includes a low-temperature water bath circulation structure 3100, which is installed on the monoclinic sedimentary stratum simulation structure 2100. The low-temperature water bath circulation structure 3100 is arranged on the surface of the monoclinic sedimentary stratum simulation structure 2100 and can effectively simulate the stability domain space of hydrate reservoirs. It can be understood that the hydraulic environment created by water injection in the reaction chamber, in conjunction with the low-temperature water bath circulation structure 3100, enables coordinated control of the pressure and temperature field conditions of the coupled sedimentary structure simulation structure.

[0071] Furthermore, the low-temperature water bath circulation structure 3100 is fitted on the outside of the monoclinic sedimentary stratum simulation structure 2100, and the monoclinic sedimentary stratum simulation structure 2100 is inserted through the low-temperature water bath circulation structure 3100, so that the low-temperature water bath circulation structure 3100 wraps around the four sides of the monoclinic sedimentary stratum simulation structure 2100.

[0072] Understandably, the stability domain simulation structure 3000 also includes a circulating pump and a thermostat, both of which are connected to the low-temperature water bath circulation structure 3100.

[0073] In some embodiments, the low-temperature water bath circulation structure 3100 can move on the surface of the monoclinic sedimentary stratum simulation structure 2100 to change the relative position of the low-temperature water bath circulation structure 3100 and the monoclinic sedimentary stratum simulation structure 2100, thereby achieving flexible control of the spatial distribution of hydrate stability domains.

[0074] The surface of the monoclinic sedimentary stratum simulation structure 2100 is provided with at least one guide structure. The low-temperature water bath circulation structure 3100 is movably connected to the guide structure so that the low-temperature water bath circulation structure 3100 can move along the guide structure to adjust its position on the surface of the monoclinic sedimentary stratum simulation structure 2100, thereby achieving effective adjustment of the spatial distribution of hydrate stability domain.

[0075] Furthermore, the guide structure is configured as a slide rail or chute, and the low-temperature water bath circulation structure 3100 is movably connected to the guide structure via rollers or sliders.

[0076] In some embodiments, the monoclinic sedimentary formation simulation structure 2100 is equipped with a multi-parameter hydrate dynamic monitoring sensor to achieve real-time dynamic monitoring of the formation and decomposition state of hydrates in the simulated reservoir of the monoclinic sedimentary formation simulation structure 2100. Specifically, the multi-parameter hydrate dynamic monitoring sensor is inserted into the monoclinic sedimentary formation simulation structure 2100.

[0077] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. A sedimentary tectonic coupled simulation structure for hydrate accumulation, characterized in that: include Simulated structure of inclined monoclinic sedimentary strata; Simulated structures of sedimentary structures arranged at an angle; A network fault simulation structure is provided, wherein the monoclinic sedimentary strata simulation structure and the network fault simulation structure are connected by the sedimentary tectonic transition simulation structure. A fault anticline simulation structure, wherein the network fault simulation structure is located at the fracture point of the fault anticline simulation structure, and the fault anticline simulation structure is connected to the network fault simulation structure; A stability domain simulation structure, the stability domain simulation structure including a low-temperature water bath circulation structure, the low-temperature water bath circulation structure being set in the monoclinic sedimentary stratum simulation structure; The simulated monoclinic sedimentary strata, the simulated sedimentary tectonic transition structure, the simulated network fault structure, and the simulated fault anticline all contain filling particles.

2. The sedimentary tectonic coupling simulation structure for hydrate accumulation according to claim 1, characterized in that: The internal cavity of the simulated monoclinic sedimentary strata is divided into at least two first chambers by permeable partitions. Each first chamber contains the filling particles, and the particle size of the filling particles in each first chamber is different.

3. The sedimentary tectonic coupled simulation structure for hydrate accumulation according to claim 1 or 2, characterized in that: The surface of the monoclinic sedimentary stratum simulation structure is provided with at least one guide structure, and the low-temperature water bath circulation structure is movably connected to the guide structure.

4. The sedimentary tectonic coupling simulation structure for hydrate accumulation according to claim 3, characterized in that: The low-temperature water bath circulation structure is fitted onto the outside of the monoclinic sedimentary strata simulation structure.

5. The sedimentary tectonic coupling simulation structure for hydrate accumulation according to claim 1 or 2, characterized in that: The network fault simulation structure includes at least two thermal fluid conduction structures, which are disposed within the cavity of the network fault simulation structure. The thermal fluid conduction structures are configured as hollow columnar structures, and the cavity of each thermal fluid conduction structure contains the filling particles.

6. The sedimentary tectonic coupling simulation structure for hydrate accumulation according to claim 5, characterized in that: The network fault simulation structure includes at least two resistance heaters, which are disposed on the heat fluid conduction structure and heat the heat fluid conduction structure.

7. The sedimentary tectonic coupling simulation structure for hydrate accumulation according to claim 1, characterized in that: The inner cavity of the simulated anticline structure is provided with at least two second chambers, and each second chamber contains the filling particles.

8. The sedimentary tectonic coupled simulation structure for hydrate accumulation according to claim 1, 2, or 7, characterized in that: The particle size of the filling particles in the simulated sedimentary tectonic transition structure is larger than that in the simulated monoclinic sedimentary strata structure, but smaller than that in the simulated network fault structure.

9. The sedimentary tectonic coupling simulation structure for hydrate accumulation according to claim 1, characterized in that: The tilt angle of the simulated monoclinic sedimentary strata is adjustable.

10. A reaction chamber for hydrate accumulation, characterized in that: The interior cavity of the reaction experimental chamber is provided with a depositional structure coupling simulation structure as described in any one of claims 1 to 9.

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