A simulation device for identifying the gas production source of coalbed methane wells with combined drainage and production.

Abstract

This invention provides a simulation device for identifying the gas production source in coalbed methane well-combined drainage and extraction, comprising: a multi-coal-seam simulation component, a drainage and extraction simulation component, a confining pressure loading component, a data acquisition component, and a wastewater and waste gas treatment component. The drainage and extraction simulation component and the confining pressure loading component are both disposed on one side of the multi-coal-seam simulation component, and the data acquisition component is disposed on top of the multi-coal-seam simulation component. This invention provides a simulation device for identifying the gas production source in coalbed methane well-combined drainage and extraction, which, by setting up material loading and unloading components and moving components, allows for convenient removal of sandstone and coal from a single simulation component after the simulation operation is completed. This facilitates cleaning, analysis, and recycling by personnel, reduces the difficulty and cost of device maintenance, and avoids the impact of material residue on the accuracy of subsequent experiments.

Description

Technical Field

[0001] This utility model relates to the field of coal seam drainage technology, and in particular to a simulation device for identifying the gas production source in coalbed methane well combined drainage. Background Technology

[0002] In the field of coalbed methane extraction, combined drainage is a common extraction method with potential advantages such as improved extraction efficiency and reduced costs. However, due to the different characteristics of each coal seam, combined drainage inevitably leads to mutual interference between them. For example, the depressurization process during drainage of one coal seam may cause changes in the gas flow direction of adjacent coal seams. Gases that were relatively stable within their respective reservoirs may exhibit abnormal cross-flow phenomena under the influence of pressure difference changes. Alternatively, differences in permeability between different coal seams may result in uneven fluid flow between them during drainage, affecting overall gas production efficiency. This interference complicates the gas production process, making it difficult to accurately predict gas sources and production volumes, posing a significant challenge to the efficient extraction of coalbed methane.

[0003] A prior art coalbed methane well combined drainage and production source identification simulation device comprises a drainage simulation system, a multi-coal-seam simulation system, a data acquisition and processing system, and a wastewater and waste gas treatment system. The drainage simulation system is connected to the input end of the multi-coal-seam simulation system via pipeline. The data acquisition system is connected to both the drainage simulation system and the multi-coal-seam simulation system via data lines. The output end of the multi-coal-seam simulation system is connected to the wastewater and waste gas treatment system via pipeline. This invention can accurately predict the gas source and production volume during combined drainage and production under different coal reservoir permeability, different surrounding rock stress, different drainage rates, and different surrounding rock recharge conditions.

[0004] After the simulation is completed, the sandstone and coal are usually sealed inside the device, which makes it difficult for staff to perform subsequent processing of the sandstone and coal after the simulation, such as cleaning, analysis and recycling. This not only increases the difficulty and cost of device maintenance, but may also affect the accuracy of the next simulation experiment due to material residue, thus hindering the further development and application of coalbed methane simulation technology.

[0005] Therefore, it is necessary to provide a simulation device for identifying the gas production source of coalbed methane wells in combined drainage and production to solve the above-mentioned technical problems. Utility Model Content

[0006] This invention provides a simulation device for identifying the gas source of coalbed methane well combined drainage, which solves the problem that existing simulation devices are difficult to clean, analyze and recycle sandstone and coal after simulation operation, increasing the difficulty and cost of device maintenance and affecting the accuracy of subsequent experiments.

[0007] To solve the above-mentioned technical problems, this utility model provides a simulation device for identifying the gas production source of coalbed methane wells in combined drainage and production, comprising:

[0008] The system includes a multi-coal-seam simulation component, a drainage simulation component, a confining pressure loading component, a data acquisition component, and a wastewater and exhaust gas treatment component. The drainage simulation component and the confining pressure loading component are both located on one side of the multi-coal-seam simulation component, the data acquisition component is located on the top of the multi-coal-seam simulation component, and the wastewater and exhaust gas treatment component is located on the other side of the multi-coal-seam simulation component.

[0009] The multi-coal seam simulation component contains multiple individual simulation components. Each individual simulation component has a material loading and unloading component at its bottom. The material loading and unloading component includes a base plate, with side plates fixedly installed at both ends of the top of the base plate. Clamping plates are provided on both sides between the two side plates. A moving component is provided at the bottom of the material loading and unloading component.

[0010] Preferably, each of the multiple single simulation components includes a housing, and multiple first drive telescopic components are fixedly installed on both sides of the housing. Pressure-bearing steel plates are provided on both sides of the inner side of the housing, and one side of the pressure-bearing steel plate is fixedly installed to the moving end of the first drive telescopic component.

[0011] Preferably, the top of the base plate abuts against the bottom of the housing, and the clamping plate and the side plate are both disposed on the inner side of the housing.

[0012] Preferably, the side plate has a sliding groove, and both ends of the clamping plate are fixedly installed with sliders, which are slidably connected to the inner side of the sliding groove.

[0013] Preferably, the moving component includes a second driving telescopic member, the bottom of which is fixedly installed on the bottom of the inner side of the multi-coal seam simulation component, and a moving plate is fixedly installed on the top of the second driving telescopic member. A plurality of push rods are fixedly installed on the top of the moving plate, and the tops of the push rods are located at the bottom of the base plate.

[0014] Preferably, a positioning block is fixedly installed on the top of the push rod, and a positioning sleeve is fixedly installed on the bottom of the base plate.

[0015] Preferably, the positioning sleeve is fitted onto the outer side of the positioning block.

[0016] Compared with related technologies, the coalbed methane well combined drainage and production gas source identification simulation device provided by this utility model has the following beneficial effects:

[0017] This invention provides a simulation device for identifying the gas source of coalbed methane well combined drainage. By setting up material loading and unloading components and moving components, sandstone and coal can be easily removed from a single simulation component after the simulation operation is completed. This facilitates cleaning, analysis and recycling by staff, reduces the difficulty and cost of device maintenance, and avoids the impact of material residue on the accuracy of subsequent experiments. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of a first embodiment of a coalbed methane well combined layer drainage and gas production source identification simulation device provided by this utility model;

[0019] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the end face of a single analog component is shown.

[0020] Figure 3 for Figure 2 The diagram shown is a top view of the material loading and unloading assembly.

[0021] Figure 4 for Figure 2 The enlarged schematic diagram of part A shown below;

[0022] Figure 5 This is a schematic diagram of the second embodiment of a simulation device for identifying the gas production source of a coalbed methane well combined with drainage and production, provided by this utility model.

[0023] The following components are labeled in the diagram: 1. Multi-coal seam simulation component; 2. Single simulation component; 21. Shell; 22. First drive telescopic component; 23. Pressure-bearing steel plate; 3. Drainage simulation component; 4. Confining pressure loading component; 5. Data acquisition component; 6. Wastewater and exhaust gas treatment component; 7. Moving component; 71. Second drive telescopic rod; 72. Moving plate; 73. Push rod; 8. Material loading and unloading component; 81. Bottom plate; 82. Side plate; 83. Clamping plate; 84. Slide groove; 85. Slider; 9. Positioning block; 91. Positioning sleeve. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] First Embodiment

[0026] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 ,in, Figure 1 A schematic diagram of the structure of a first embodiment of a coalbed methane well combined layer drainage and gas production source identification simulation device provided by this utility model; Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the end face of a single analog component is shown. Figure 3 for Figure 2 The diagram shown is a top view of the material loading and unloading assembly. Figure 4 for Figure 2 The diagram shows an enlarged view of part A. A simulation device for identifying the gas production source of a coalbed methane well with combined drainage and production includes: a multi-coal-seam simulation component 1, a drainage and production simulation component 3, a confining pressure loading component 4, a data acquisition component 5, and a wastewater and waste gas treatment component 6. The drainage and production simulation component 3 and the confining pressure loading component 4 are both disposed on one side of the multi-coal-seam simulation component 1, the data acquisition component 5 is disposed on the top of the multi-coal-seam simulation component 1, and the wastewater and waste gas treatment component 6 is disposed on the other side of the multi-coal-seam simulation component 1.

[0027] The multi-coal seam simulation component 1 is internally provided with multiple single simulation components 2. The bottom of the single simulation component 2 is provided with a material loading and unloading component 8. The material loading and unloading component 8 includes a bottom plate 81. Side plates 82 are fixedly installed at both ends of the top of the bottom plate 81. Clamping plates 83 are provided on both sides between the two side plates 82. The bottom of the material loading and unloading component 8 is provided with a moving component 7.

[0028] Each of the multiple single simulation components 2 includes a housing 21, and multiple first drive telescopic members 22 are fixedly installed on both sides of the housing 21. Pressure-bearing steel plates 23 are provided on both sides of the inner side of the housing 21, and one side of the pressure-bearing steel plate 23 is fixedly installed to the moving end of the first drive telescopic member 22.

[0029] The top of the base plate 81 abuts against the bottom of the housing 21, and the clamping plate 83 and the side plate 82 are both disposed on the inner side of the housing 21.

[0030] The side plate 82 has a sliding groove 84 on its side, and both ends of the clamping plate 83 are fixedly installed with sliders 85, which are slidably connected to the inner side of the sliding groove 84.

[0031] The moving component 7 includes a second driving telescopic component 71. The bottom of the second driving telescopic component 71 is fixedly installed on the bottom of the inner side of the multi-coal seam simulation component 1. A moving plate 72 is fixedly installed on the top of the second driving telescopic component 71. A plurality of push rods 73 are fixedly installed on the top of the moving plate 72. The top of the push rods 73 is located at the bottom of the base plate 81.

[0032] During the experiment, the confining pressure loading component 4 applies confining pressure to the multi-coal seam simulation component 1. The hydraulic press in the confining pressure loading component is connected to the first drive telescopic component 22 of the single simulation component 2 through the oil pipeline. The oil pump pressurizes the hydraulic oil in the hydraulic oil tank and delivers it to the first drive telescopic component 22. The first drive telescopic component 22 generates pressure and acts on the pressure-bearing steel plate 23 to simulate the confining pressure environment of the coal seam underground.

[0033] The drainage simulation component 3 simulates the drainage process of coalbed methane. By controlling the relevant equipment, it simulates different drainage rates, pressures and other conditions, so that gas and liquid flow in the multi-coal-seam simulation component 1. In the single simulation component 2, the first driving telescopic component 22 can push the pressure-bearing steel plate 23 to move, thereby simulating the deformation of the coal seam under different stress conditions, affecting the flow and production of coalbed methane.

[0034] The data acquisition component 5 collects data such as pressure and flow rate in the multi-coal seam simulation component 1 in real time. The sensors in the data acquisition component are connected to the inside of the single simulation component 2 and transmit the collected data to the external data processing equipment for analysis of gas source and gas production.

[0035] The wastewater and exhaust gas treatment component 6 treats the wastewater and exhaust gas generated during the mining simulation process. The wastewater and exhaust gas treatment component is connected to the multi-coal seam simulation component 1 through pipelines to collect, separate and treat the discharged wastewater and exhaust gas to achieve environmentally friendly emissions.

[0036] The working principle of the coalbed methane well combined layer drainage gas production source identification simulation device provided by this utility model is as follows:

[0037] During the simulation, multiple portions of sandstone and coal are placed inside the material loading and unloading assembly 8, positioning the sandstone and coal between the two side plates 82 and the two clamping plates 83. Then, the second drive telescopic component 71 is activated, extending to move the bottom plate 81 upwards, so that the bottom of the bottom plate 81 abuts against the bottom of the housing 21, and the two clamping plates 83 are positioned between the two pressure-bearing steel plates 23. At this time, the first drive telescopic component 22 extends, pushing the two pressure-bearing steel plates 23 towards the center, thereby causing the clamping plates 83 to push and squeeze the sandstone and coal. Then, the simulation operation is performed.

[0038] At the end of the simulation experiment of gas source for coalbed methane well combined drainage and production, the material loading and unloading component 8 is operated by the moving component 7. The second drive telescopic component 71 is activated, and its contraction drives the moving plate 72 to descend. The moving plate 72 drives the push rod 73 to move downward, so that the material loading and unloading component 8 is separated from the single simulation component 2. At this time, the sandstone and coal on the material loading and unloading component 8 can be cleaned, analyzed or recycled.

[0039] Compared with related technologies, the coalbed methane well combined drainage and production gas source identification simulation device provided by this utility model has the following beneficial effects:

[0040] By setting up the material loading and unloading component 8 and the moving component 7, sandstone and coal can be easily removed from the single simulation component 2 after the simulation operation is completed. This facilitates cleaning, analysis and recycling by staff, reduces the difficulty and cost of device maintenance, and avoids the impact of material residue on the accuracy of subsequent experiments.

[0041] Second Embodiment

[0042] Please refer to the following: Figure 5 Based on the first embodiment of this application, which provides a simulation device for identifying the gas production source in coalbed methane well strata drainage, the second embodiment of this application proposes another simulation device for identifying the gas production source in coalbed methane well strata drainage. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0043] Specifically, the second embodiment of this application provides a simulation device for identifying the gas source of a coalbed methane well combined with its production layer. In this simulation device, a positioning block 9 is fixedly installed on the top of the push rod 73, and a positioning sleeve 91 is fixedly installed on the bottom of the base plate 81.

[0044] The positioning sleeve 91 is fitted onto the outer side of the positioning block 9.

[0045] The working principle of the coalbed methane well combined layer drainage gas production source identification simulation device provided by this utility model is as follows:

[0046] When in use, the user places the positioning sleeve 91 on the outer side of the positioning block 9, thereby installing the material loading and unloading component 8 and the moving component 7. When cleaning the material inside the material loading and unloading component 8, the staff can remove the material loading and unloading component 8 from the moving component 7, which makes it easier for the staff to clean the material loading and unloading component 8.

[0047] Compared with related technologies, the coalbed methane well combined drainage and production gas source identification simulation device provided by this utility model has the following beneficial effects:

[0048] The positioning block 9 and positioning sleeve 91 work together to facilitate the disassembly of the moving component 7 and the material loading and unloading component 8 during use. This makes it easier for staff to clean the material loading and unloading component 8 and avoids affecting the accuracy of subsequent simulation data.

[0049] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A simulation device for identifying the gas production source of a coalbed gas well with a combined layer drainage, characterized in that, include: The system includes a multi-coal-seam simulation component, a drainage simulation component, a confining pressure loading component, a data acquisition component, and a wastewater and exhaust gas treatment component. The drainage simulation component and the confining pressure loading component are both located on one side of the multi-coal-seam simulation component, the data acquisition component is located on the top of the multi-coal-seam simulation component, and the wastewater and exhaust gas treatment component is located on the other side of the multi-coal-seam simulation component. The multi-coal seam simulation component contains multiple individual simulation components. Each individual simulation component has a material loading and unloading component at its bottom. The material loading and unloading component includes a base plate, with side plates fixedly installed at both ends of the top of the base plate. Clamping plates are provided on both sides between the two side plates. A moving component is provided at the bottom of the material loading and unloading component.

2. The coalbed gas well combined layer drainage gas source identification simulation device according to claim 1, characterized in that, Each of the aforementioned single simulation components includes a housing, and multiple first drive telescopic components are fixedly installed on both sides of the housing. Pressure-bearing steel plates are provided on both sides of the inner side of the housing, and one side of the pressure-bearing steel plate is fixedly installed to the moving end of the first drive telescopic component.

3. The device according to claim 2, characterized in that, The top of the base plate abuts against the bottom of the housing, and the clamping plate and the side plate are both disposed on the inner side of the housing.

4. The device according to claim 1, characterized in that, The side plate has a sliding groove, and both ends of the clamping plate are fixedly installed with sliders, which are slidably connected to the inner side of the sliding groove.

5. The simulation device for identifying the gas production source of a coalbed methane well combined with drainage as described in claim 1, characterized in that, The moving component includes a second driving telescopic member. The bottom of the second driving telescopic member is fixedly installed on the bottom of the inner side of the multi-coal seam simulation component. A moving plate is fixedly installed on the top of the second driving telescopic member. A plurality of push rods are fixedly installed on the top of the moving plate. The top of the push rods is located at the bottom of the base plate.

6. The coalbed gas well combined layer drainage gas source identification simulation device according to claim 5, characterized in that, A positioning block is fixedly installed on the top of the push rod, and a positioning sleeve is fixedly installed on the bottom of the base plate.

7. The device according to claim 6, characterized in that, The positioning sleeve is fitted onto the outer side of the positioning block.

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