N2 and CO2 huff-puff simulation experiment device

Abstract

The invention belongs to the technical field of simulation experiment devices, and discloses an N2 and CO2 huff-puff simulation experiment device. Comprising a gas pressurizing assembly for pressurizing gas, a high-pressure gas flow control assembly for controlling and collecting the flow range and the injection rate of inlet gas and identifying switching of various gases, a rock core clamping assembly for clamping a rock core, and a pressure returning assembly for controlling the pressure and the flow rate of an outlet, the constant-speed and constant-pressure assembly is used for achieving quantitative and constant-speed injection of injected liquid, the annular pressure tracking assembly is used for achieving pressure difference tracking feedback between confining pressure and injection pressure, and the outlet gas-liquid separation metering assembly is used for achieving gas-liquid separation metering. The crude oil CO2 / N2 alternate displacement injection amount simulation analysis simulation device is used for simulating the change conditions of oil displacement efficiency and porosity in a CO2 / N2 repeated alternate injection displacement mode.

Description

Technical Field

[0001] The present invention belongs to the technical field of simulation experimental devices, and the present invention relates to a N2 and CO2 throughput simulation experimental device, and in particular to a device for injecting CO2 to increase the recovery degree of heterogeneous bottom water gas reservoirs and can carry out various conventional plunger core experiments to study displacement mechanisms. Background Art

[0002] Due to CO2's ability to extract crude oil and its strong adsorption in organic matter, CO2 injection technology has become one of the most effective means of efficiently developing oil reservoirs. However, due to CO2's greenhouse effect and gas source limitations, in order to reduce the use of CO2, exploring the method of N2 and CO2 displacement of crude oil has become a hot topic in current oil development.

[0003] Since there are few studies on the alternating injection of N2 and CO2, the main research direction is still focused on the effectiveness of N2 and CO2 in displacing crude oil. There is still a lack of simulation research on the oil recovery efficiency, porosity changes and changes in the injection amount of carbon dioxide and nitrogen during multiple alternating displacements of carbon dioxide and nitrogen. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to overcome the shortcomings of the existing simulation experimental devices. The present invention provides a N2 and CO2 throughput simulation device, which is a crude oil CO2 / N2 alternating displacement injection amount simulation analysis simulation device, which is used to simulate the changes in oil recovery efficiency and porosity under multiple CO2 / N2 alternating injection displacement methods, and can complete basic permeability test experiments, CO2 / N2 oil recovery experiments under reservoir conditions, gas drive miscible conditions, and experiments on improving miscible capacity, and carry out research on continuous gas drive, gas-water alternating oil recovery mechanism, and research on crude oil migration laws during gas drive.

[0005] The above object of the present invention is achieved through the following technical solutions:

[0006] A N2 and CO2 throughput simulation device comprises a gas pressurizing component for pressurizing gas, a high-pressure gas flow control component for controlling and collecting the range and injection amount of inlet gas flow and having the function of identifying the switching of multiple gases, a core clamping component for clamping cores, a back pressure component for controlling outlet pressure and flow, a constant speed and constant pressure component for quantitative and constant speed injection of injected liquid, an annular pressure tracking component for tracking and feedback of the pressure difference between confining pressure and injection pressure, and an outlet gas-liquid separation metering component for gas-liquid separation metering.

[0007] The gas boosting component is connected to the high-pressure gas flow control component, the core clamping component, the back pressure component, and the outlet gas-liquid separation metering component in sequence through pipelines; the constant speed and constant pressure component is tapped on the pipeline connecting the high-pressure gas flow control component and the core clamping component, and the ring pressure tracking component is connected to the core clamping component.

[0008] The gas boosting assembly includes a gas cylinder, a transformer, a gas boosting pump, a driving pressure regulator, and a storage tank; the gas cylinder is connected to the gas boosting pump and the storage tank in sequence through pipelines, and the transformer is connected to the driving pressure regulator and the gas boosting pump in sequence through pipelines; the end of the storage tank is connected to the pressure reducing valve in the high-pressure gas flow control assembly through a pipeline.

[0009] The gas cylinder is equipped with a vent valve and a gas cylinder pressure gauge, a pressure sensor is provided at the driving pressure regulator, a butterfly valve is provided between the driving pressure regulator and the gas booster pump, butterfly valves are provided at the front and rear end pipelines of the storage tank, and the storage tank is equipped with a pressure sensor.

[0010] The high-pressure gas flow control component includes a pressure reducing valve and a flow controller; the end of the pressure reducing valve is connected to the front end of a flow parallel pipeline through a pipeline, the flow parallel pipeline includes a flow controller branch and a flow branch, the flow controller branch and the flow branch are connected in parallel, and the flow controller is arranged on the flow controller branch.

[0011] The front end of the pressure reducing valve is provided with a vent valve, the outlet of the pressure reducing valve is also provided with a pressure gauge, the front and rear ends of the flow controller are provided with butterfly valves, and the flow branch is provided with a butterfly valve. The ends of the flow parallel pipeline are respectively connected to the core clamping assembly and the constant speed and constant pressure assembly through pipelines.

[0012] The core clamping assembly comprises a core clamp, and a core assembly inlet pressure sensor and a core assembly outlet pressure sensor are respectively arranged on the front end and rear end pipelines of the core clamp.

[0013] The back pressure assembly includes a back pressure valve, a back pressure tracking pump, and a back pressure container; one end of the back pressure valve is connected to the core clamping assembly, the upper part is connected to the back pressure container, the back pressure container is connected to the back pressure tracking pump, and the bottom of the back pressure valve is connected to the gas-liquid separator in the outlet gas-liquid separation metering assembly through a pipeline.

[0014] A butterfly valve is arranged on the pipeline connecting the back-pressure container and the back-pressure tracking pump. The back-pressure container is equipped with a pressure gauge.

[0015] The constant speed and constant pressure assembly includes a thermostatic box and a constant speed and constant pressure pump. An intermediate container for placing high-pressure liquid is arranged in the thermostatic box. The intermediate container is arranged on the intermediate container pipeline. The intermediate container pipeline is also connected in parallel with a constant pressure and constant speed pipeline. The front and rear ends of the intermediate container are provided with butterfly valves, and the constant pressure and constant speed pipeline is provided with a butterfly valve. The constant speed and constant pressure pump is respectively connected with the intermediate container pipeline and the constant pressure and constant speed pipeline. The intermediate container pipeline and the constant pressure and constant speed pipeline are respectively connected with the core holder, the flow parallel pipeline, and the core assembly inlet pressure sensor through pipelines at the end of the confluence pipeline. The thermostatic box is equipped with a temperature sensor.

[0016] The annular pressure tracking assembly comprises an annular pressure tracking pump, which is connected to the core holder through a pipeline, and a pressure sensor is arranged on the pipeline.

[0017] The outlet gas-liquid separation metering component includes a liquid metering component, a gas metering component, and a gas-liquid separator; the liquid metering component is arranged below the gas-liquid separator, the gas metering component is connected to the top of the gas-liquid separator through a pipeline, and a drying pipe for drying gas is also arranged at the outlet of the gas-liquid separator;

[0018] The liquid metering component comprises an electronic balance, on which a liquid receiving container is arranged, and the electronic balance is equipped with a weight sensor.

[0019] The gas metering component comprises a plurality of gas flow meters connected in parallel; and a butterfly valve is arranged on each pipeline where the gas flow meter is arranged.

[0020] Furthermore, the gas booster component can meet the shortage of gas pressure during the simulation experiment. It uses compressed air as the power source and the gas booster pump as the pressure source. The output gas pressure is proportional to the driving gas source pressure. By adjusting the driving gas source pressure, the corresponding boosted gas pressure is obtained. When the driving gas source pressure is balanced with the boosted gas pressure, the gas booster pump stops charging, and the output gas pressure is stabilized at the pre-adjusted pressure.

[0021] Furthermore, when the outlet meets the internal saturation pressure, the back pressure can be controlled by the back pressure assembly according to the specific requirements of the experimental pressure. The back pressure container can improve the accuracy of the back pressure control and ensure the accuracy of the measurement.

[0022] Furthermore, the constant speed and constant pressure assembly meets the requirements for injection flow and pressure during the experiment.

[0023] Furthermore, the annular pressure tracking pump can simulate the formation pressure and track the inlet pressure, thereby realizing automatic tracking and control of the pressure difference between the confining pressure and the injection pressure.

[0024] Furthermore, the outlet gas-liquid separation metering component automatically separates the gas and liquid during the experiment, and then measures the output through an electronic balance and a gas flow meter.

[0025] The device also includes a data acquisition unit and a data processing unit. The data acquisition unit is connected to the simulation device and is used to collect the pressure, temperature, gas flow rate, and liquid metering data in the simulation device. The data acquisition unit is connected to the data processing unit via a data line, and the data processing unit is used to monitor and process data in real time. The data acquisition unit and the data processing unit are not specifically limited in model, and can be any one that realizes their working functions. And the data can be collected and analyzed relying on a computer as a carrier.

[0026] In order to facilitate the operation of the device, a PLC control system is preferably provided. The transformer, temperature sensor, gas booster pump, drive voltage regulator, pressure reducing valve, flow controller, core clamp, core assembly inlet pressure sensor, core assembly outlet pressure sensor, back pressure valve, back pressure tracking pump, constant speed constant pressure pump, electronic balance, gas-liquid separator, gas flow meter, vent valve, gas cylinder pressure gauge, pressure sensor, butterfly valve, vent valve pressure gauge, constant temperature box ring pressure tracking pump, pressure sensor, and weight sensor are respectively connected to the PLC control system, and are not limited to a specific model, as long as their working functions are realized.

[0027] The device realizes a set of throughput simulation experimental devices that meet high-precision, high-temperature and high-pressure conditions by setting up various components and connecting them with the PLC control system through pipelines. The N2 and CO2 throughput simulation device provided by the present invention combines a high-pressure gas flow control component, a constant speed and pressure component, an annular pressure tracking component, a gas boost component, a back pressure component, a core clamping component and an outlet gas-liquid separation metering component, which can meet the requirements according to different experimental parameters, and achieve the simulation of the change law of the throughput injection volume and the production volume through the overall operation of the device.

[0028] The present invention provides a N2 and CO2 huff-and-puff simulation device, which is a simulated enhanced oil recovery experimental device, specifically a device for injecting CO2 to huff and puff to improve the recovery of heterogeneous bottom water gas reservoirs and can carry out various conventional plunger core research displacement mechanism experiments. For example, reservoir sensitivity research, relative permeability curve determination, etc. The high temperature environment is simulated by a thermostatic box, and the back pressure valve simulates the actual formation pressure, thereby maximally restoring the seepage environment under formation conditions.

[0029] The beneficial effects of the present invention compared with the prior art are:

[0030] The present invention provides a N2 and CO2 huff-and-puff simulation device, which can accurately simulate the confining pressure, annular pressure, temperature, injection volume and production volume in the formation environment in a 1:1 ratio during the CO2 / N2 alternating displacement experiment, and conduct real-time data acquisition and signal feedback physical simulation experiments. At the same time, the device adopts a modular design and can be combined according to different experimental requirements to carry out gas-water, gas-oil, oil-water (including CO2 gas displacement, miscible and immiscible) phase permeability experiments, sensitivity evaluations, and some tertiary oil recovery (such as polymer flooding, surfactant flooding, etc.) related oil recovery efficiency evaluations and enhanced recovery related experimental simulation studies. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a schematic diagram of a N2 and CO2 throughput simulation device of the present invention.

[0033] In the figure: 1. gas booster assembly, 2. high-pressure gas flow control assembly, 3. core clamping assembly, 4. back pressure assembly, 5. constant speed and constant pressure assembly, 6. ring pressure tracking assembly, 7. liquid metering assembly, 8. gas metering assembly, 101. gas cylinder, 102. transformer, 103. gas booster pump, 104. drive pressure regulator, 105. storage tank, 201. pressure reducing valve, 202. flow controller, 301. core clamp, 302. core assembly inlet pressure sensor, 303. core assembly outlet pressure sensor, 401. back pressure valve, 402. back pressure tracking pump, 403. back pressure container, 501. constant speed and constant pressure pump, 502. intermediate container, 701. electronic balance, 702. gas-liquid separator, 703. drying tube, 801. gas flow meter. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] The present invention is described in detail below by specific examples, but the protection scope of the present invention is not limited. Unless otherwise specified, the experimental methods used in the present invention are all conventional methods, and the experimental equipment, materials, reagents, etc. used can be obtained from commercial channels.

[0036] In the description of the present invention, it should be noted that the terms "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for distinction, and cannot be understood as indicating or implying relative importance.

[0037] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0039] In the embodiment, the temperature sensor, transformer, gas booster pump, drive voltage regulator, pressure reducing valve, flow controller, core clamp, core assembly inlet pressure sensor, core assembly outlet pressure sensor, back pressure valve, back pressure tracking pump, constant speed constant pressure pump, electronic balance, gas-liquid separator, gas flow meter, vent valve, gas cylinder pressure gauge, pressure sensor, butterfly valve, vent valve pressure gauge, constant temperature box ring pressure tracking pump, pressure sensor, weight sensor are connected to the PLC system respectively; they are not limited to a specific model, and their working functions can be realized.

[0040] Example 1

[0041] A N2 and CO2 throughput simulation device comprises a gas pressurizing component 1 for pressurizing gas, a high-pressure gas flow control component 2 for controlling and collecting the range and injection amount of inlet gas flow and having the function of identifying the switching of multiple gases, a core clamping component 3 for clamping cores, a back pressure component 4 for controlling outlet pressure and flow, a constant speed and constant pressure component 5 for quantitative and constant speed injection of injected liquid, an annular pressure tracking component 6 for tracking and feedback of the pressure difference between the confining pressure and the injection pressure, and an outlet gas-liquid separation metering component for achieving gas-liquid separation metering.

[0042] The gas boosting component 1 is connected to the high-pressure gas flow control component 2, the core clamping component 3, the back pressure component 4, and the outlet gas-liquid separation metering component in sequence through pipelines; the constant speed and constant pressure component 5 is connected to the pipeline connecting the high-pressure gas flow control component 2 and the core clamping component 3, and the ring pressure tracking component 6 is connected to the core clamping component 3.

[0043] The gas boosting component 1 includes a gas cylinder 101, a transformer 102, a gas boosting pump 103, a driving pressure regulator 104, and a storage tank 105; the gas cylinder 101 is connected to the gas boosting pump 103 and the storage tank 105 in sequence through pipelines, and the transformer 102 is connected to the driving pressure regulator 104 and the gas boosting pump 103 in sequence through pipelines; the end of the storage tank 105 is connected to the pressure reducing valve 201 in the high-pressure gas flow control component 2 through a pipeline.

[0044] The gas cylinder 101 is equipped with a vent valve and a gas cylinder pressure gauge, a pressure sensor is provided at the driving pressure regulator 104, a butterfly valve is provided between the driving pressure regulator 104 and the gas booster pump 103, butterfly valves are provided at the front and rear end pipelines of the storage tank 105, and the storage tank 105 is equipped with a pressure sensor.

[0045] The high-pressure gas flow control component 2 includes a pressure reducing valve 201 and a flow controller 202; the end of the pressure reducing valve 201 is connected to the front end of the flow parallel pipeline through a pipeline, the flow parallel pipeline includes a flow controller branch and a flow branch, the flow controller branch and the flow branch are connected in parallel, and the flow controller 202 is arranged on the flow controller branch.

[0046] The front end of the pressure reducing valve 201 is provided with a vent valve, the outlet of the pressure reducing valve 201 is also provided with a pressure gauge, the front and rear ends of the flow controller 202 are provided with butterfly valves, and the flow branch is provided with a butterfly valve. The ends of the flow parallel pipeline are respectively connected to the core clamping assembly 3 and the constant speed and constant pressure assembly 5 through pipelines.

[0047] The core clamping assembly 3 comprises a core clamp 301 , and a core assembly inlet pressure sensor 302 and a core assembly outlet pressure sensor 303 are respectively arranged on the front end and rear end pipelines of the core clamp 301 .

[0048] The back pressure assembly 4 includes a back pressure valve 401, a back pressure tracking pump 402, and a back pressure container 403; one end of the back pressure valve 401 is connected to the core clamping assembly 3, and the top is connected to the back pressure container 403, the back pressure container 403 is connected to the back pressure tracking pump 402, and the bottom of the back pressure valve 401 is connected to the gas-liquid separator 702 in the outlet gas-liquid separation metering assembly through a pipeline.

[0049] A butterfly valve is provided on the pipeline connecting the back-pressure container 403 and the back-pressure tracking pump 402. The back-pressure container 403 is equipped with a pressure gauge.

[0050] The constant speed and constant pressure assembly 5 includes a thermostat, a constant speed and constant pressure pump 501, an intermediate container 502 for placing high pressure liquid is arranged in the thermostat, the intermediate container 502 is arranged on the intermediate container pipeline, the intermediate container pipeline is also connected in parallel with a constant pressure and constant speed pipeline, the front and rear ends of the intermediate container are provided with butterfly valves, and the constant pressure and constant speed pipeline is provided with a butterfly valve; the constant speed and constant pressure pump 502 is respectively connected to the intermediate container pipeline and the constant pressure and constant speed pipeline, and the intermediate container pipeline and the constant pressure and constant speed pipeline are respectively connected to the core holder 301, the flow parallel pipeline, and the core assembly inlet pressure sensor 302 through pipelines. The thermostat is equipped with a temperature sensor.

[0051] The annular pressure tracking assembly 6 includes an annular pressure tracking pump, which is connected to the core holder 301 through a pipeline, and a pressure sensor is provided on the pipeline.

[0052] The outlet gas-liquid separation metering assembly includes a liquid metering assembly 7, a gas metering assembly 8, and a gas-liquid separator 702; the liquid metering assembly 7 is arranged below the gas-liquid separator 702, the gas metering assembly 8 is connected to the top of the gas-liquid separator 702 through a pipeline, and a drying pipe 703 for drying gas is also arranged at the outlet of the gas-liquid separator 702;

[0053] The liquid metering assembly 7 comprises an electronic balance 701, on which a liquid receiving container is arranged. The electronic balance 701 is equipped with a weight sensor.

[0054] The gas metering assembly 8 includes a plurality of gas flow meters 801 connected in parallel; and each pipeline on which the gas flow meter 801 is provided is provided with a butterfly valve.

[0055] The gas booster assembly 1 can meet the shortage of gas pressure during the simulation experiment. It uses compressed air as the power source and the gas booster pump 103 as the pressure source. The output gas pressure is proportional to the driving gas source pressure. By adjusting the driving gas source pressure, the corresponding boosted gas pressure is obtained. When the driving gas source pressure is balanced with the boosted gas pressure, the gas booster pump 103 stops charging, and the output gas pressure is stabilized at the pre-adjusted pressure.

[0056] When the outlet meets the internal saturation pressure, the back pressure is controlled according to the specific requirements of the experimental pressure through the back pressure component 4. The back pressure container 403 can improve the accuracy of the back pressure control and ensure the accuracy of the measurement.

[0057] The constant speed and constant pressure assembly 5 meets the requirements for injection flow and pressure during the experiment.

[0058] The annular pressure tracking pump can simulate the formation pressure and track the inlet pressure, realizing automatic tracking and control of the pressure difference between the confining pressure and the injection pressure.

[0059] The outlet gas-liquid separation metering component automatically separates the gas and liquid during the experiment, and measures the output through the electronic balance 701 and the gas flow meter 801.

[0060] The device also includes a data acquisition unit and a data processing unit. The data acquisition unit is connected to the simulation device and is used to collect the pressure, temperature, gas flow rate, and liquid metering data in the simulation device. The data acquisition unit is connected to the data processing unit via a data line, and the data processing unit is used to monitor and process data in real time. The data acquisition unit and the data processing unit are not specifically limited in model, and can be any one that realizes their working functions. And the data can be collected and analyzed relying on a computer as a carrier.

[0061] In order to facilitate the operation of the device, a PLC control system is preferably provided. The transformer 102, temperature sensor, gas booster pump 103, drive voltage regulator 104, pressure reducing valve 201, flow controller 202, core clamp 301, core assembly inlet pressure sensor 302, core assembly outlet pressure sensor 303, back pressure valve 401, back pressure tracking pump 402, constant speed constant pressure pump 501, electronic balance 701, gas-liquid separator 702, gas flow meter 801, vent valve, gas cylinder pressure gauge, pressure sensor, butterfly valve, vent valve pressure gauge, thermostatic box ring pressure tracking pump, pressure sensor, and weight sensor are respectively connected to the PLC control system, and are not limited to a specific model, as long as their working functions are realized.

[0062] The above-mentioned N2 and CO2 throughput simulation experimental device, when used specifically, is realized by connecting the pipelines of each component to the PLC control system to realize a set of throughput simulation experimental devices with high precision, high temperature and high pressure. The working principle of the present invention is: by vacuuming the core and simulating saturated oil, the core is pressurized by the ring pressure tracking pump and heated by the thermostat, and the core pressurization state directly under the high temperature and high pressure environment is more in line with the actual situation in the simulation of N2 and CO2 displacement process, and the gas booster pump 103 is pressurized to reach the experimental pressure. The injected gas amount is controlled by the high-pressure mass flow controller 202 to saturate. When the saturation time reaches a certain reference, the outlet metering component can be opened to compare and monitor the output. After the N2 injection is completed, CO2 can be injected for the second time to meet the requirements of the N2 and CO2 throughput simulation experiment. After the experiment is completed, the two sets of data can be compared to obtain the output under different gas injection environments, which can provide sufficient basis and support for further analysis of the change law. The collected data can be processed by computer to generate original data reports, analysis reports and curves, and at the same time generate database file formats for flexible use.

[0063] The above-described embodiments are only preferred embodiments of the present invention, and are not all feasible embodiments of the present invention. For those skilled in the art, any obvious changes made to it without departing from the principles and spirit of the present invention should be considered to be included in the scope of protection of the claims of the present invention. Although the present invention has been described above with reference to the embodiments, various improvements can be made to it and the components thereof can be replaced by equivalents without departing from the scope of the present invention. In particular, as long as there is no technical conflict, the various features in the embodiments disclosed in the present invention can be used in combination with each other in any way, and the fact that these combinations are not exhaustively described in this specification is only for the purpose of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A N2 and CO2 throughput simulation device, characterized in that: The invention comprises a gas pressurizing component (1) for pressurizing gas, a high-pressure gas flow control component (2) for controlling and collecting the range and injection amount of the inlet gas flow and having the function of identifying the switching of multiple gases, a core clamping component (3) for clamping the core, a back pressure component (4) for controlling the outlet pressure and flow, a constant speed and constant pressure component (5) for realizing quantitative and constant speed injection of the injected liquid, an annular pressure tracking component (6) for realizing pressure difference tracking and feedback between the confining pressure and the injection pressure, and an outlet gas-liquid separation metering component for realizing gas-liquid separation metering.

2. A N2 and CO2 throughput simulation device as claimed in claim 1, characterized in that: The gas boosting component (1) is sequentially connected to the high-pressure gas flow control component (2), the core clamping component (3), the back pressure component (4), and the outlet gas-liquid separation metering component through pipelines; the constant speed and constant pressure component (5) is tapped on the pipeline connecting the high-pressure gas flow control component (2) and the core clamping component (3), and the ring pressure tracking component (6) is connected to the core clamping component (3).

3. A N2 and CO2 throughput simulation device as claimed in claim 2, characterized in that: The gas booster assembly (1) comprises a gas cylinder (101), a transformer (102), a gas booster pump (103), a driving pressure regulator (104), and a storage tank (105); the gas cylinder (101) is connected to the gas booster pump (103) and the storage tank (105) in sequence through pipelines; the transformer (102) is connected to the driving pressure regulator (104) and the gas booster pump (103) in sequence through pipelines; and the end of the storage tank (105) is connected to a pressure reducing valve (201) in a high-pressure gas flow control assembly (2) through a pipeline.

4. A N2 and CO2 throughput simulation device as claimed in claim 3, characterized in that: The high-pressure gas flow control component (2) comprises a pressure reducing valve (201) and a flow controller (202); the end of the pressure reducing valve (201) is connected to the front end of a flow parallel pipeline via a pipeline, the flow parallel pipeline comprises a flow controller branch and a flow branch, the flow controller branch and the flow branch are connected in parallel, and the flow controller (202) is arranged on the flow controller branch.

5. A N2 and CO2 throughput simulation device as claimed in claim 4, characterized in that: The core clamping assembly (3) comprises a core clamp (301), and a core assembly inlet pressure sensor (302) and a core assembly outlet pressure sensor (303) are respectively provided on the front end and rear end pipelines of the core clamp (301).

6. A N2 and CO2 throughput simulation device as claimed in claim 5, characterized in that: The back pressure assembly (4) comprises a back pressure valve (401), a back pressure tracking pump (402), and a back pressure container (403); one end of the back pressure valve (401) is connected to the core clamping assembly (3), and the upper end is connected to the back pressure container (403); the back pressure container (403) is connected to the back pressure tracking pump (402); and the bottom of the back pressure valve (401) is connected to the gas-liquid separator (702) in the outlet gas-liquid separation metering assembly through a pipeline.

7. A N2 and CO2 throughput simulation device as claimed in claim 6, characterized in that: The constant speed and constant pressure component (5) comprises a constant temperature box and a constant speed and constant pressure pump (501). An intermediate container (502) for placing high-pressure liquid is arranged in the constant temperature box. The intermediate container (502) is arranged on an intermediate container pipeline. The intermediate container pipeline is also connected in parallel with a constant pressure and constant speed pipeline. The front and rear ends of the intermediate container are both provided with butterfly valves, and the constant pressure and constant speed pipeline is provided with a butterfly valve. The constant speed and constant pressure pump (502) is respectively connected to the intermediate container pipeline and the constant pressure and constant speed pipeline. The intermediate container pipeline and the constant pressure and constant speed pipeline are respectively connected to the core clamp (301), the flow parallel pipeline, and the core component inlet pressure sensor (302) through pipelines.

8. A N2 and CO2 throughput simulation device as claimed in claim 7, characterized in that: The annular pressure tracking component (6) comprises an annular pressure tracking pump, which is connected to the core holder (301) via a pipeline, and a pressure sensor is provided on the pipeline.

9. A N2 and CO2 throughput simulation device as claimed in claim 8, characterized in that: The outlet gas-liquid separation metering component comprises a liquid metering component (7), a gas metering component (8), and a gas-liquid separator (702); the liquid metering component (7) is arranged below the gas-liquid separator (702), the gas metering component (8) is connected to the top of the gas-liquid separator (702) via a pipeline, and a drying pipe (703) for drying gas is also arranged at the outlet of the gas-liquid separator (702).

10. The N2 and CO2 throughput simulation device according to claim 1, characterized in that: The device also includes a data acquisition unit and a data processing unit. The data acquisition unit is connected to the simulation device and is used to collect pressure, temperature, gas flow rate, and liquid metering data in the simulation device; the data acquisition unit is connected to the data processing unit via a data line, and the data processing unit is used to monitor and process data in real time.

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