Simulation experiment device for annulus entrapment pressure of strong-production and strong-injection gas storage well containing nitrogen column

Abstract

The invention relates to a nitrogen-column-containing strong-production and strong-injection gas storage well annulus entrapment pressure simulation experiment device which comprises a high-temperature and high-pressure kettle body, a high-temperature and high-pressure kettle cover is arranged on the high-temperature and high-pressure kettle body, and an oil pipe sample is fixedly connected into the high-temperature and high-pressure kettle body. A separator is horizontally arranged on the outer side of the oil pipe sample in the high-temperature and high-pressure kettle body, and an emptying pipeline for emptying is also arranged on the high-temperature and high-pressure kettle body; a pressure control system for controlling the pressure and a data acquisition system for analyzing the data of the internal condition of the high-temperature and high-pressure kettle body are arranged on the high-temperature and high-pressure kettle body. The device solves the problem that in the prior art, equipment for the indoor simulation experiment of the annulus entrapment pressure containing the nitrogen column of the gas storage well with strong production and strong injection is lacked.

Description

Technical Field

[0001] The present application relates to the field of annular pressure control of oil and natural gas, and in particular to an annular closure pressure simulation experimental device for a nitrogen-containing gas column-containing strong production and injection gas storage well. Background Art

[0002] As an important basic energy structure facility, gas storage plays a role in seasonal peak load regulation and emergency gas supply. However, in recent years, the gas supply tasks required by gas storage have intensified year by year, and the gas injection and production volume has reached a record high.

[0003] During the intensive injection and production process of gas storage wells, the temperature and pressure in the wellbore will change dramatically, causing a sharp increase in the trapped pressure in the casing annulus, which may lead to fatigue of the casing and wellbore seal failure, reduce the service life of the wellbore, and in severe cases even cause the oil pipe to be squeezed or even scrapped.

[0004] Regarding the above-mentioned related technologies, the inventors believe that the more economical and feasible method is to inject a nitrogen column into the annulus to control the annulus closure pressure. However, due to the limitations of field tests, it is difficult to conduct quantitative and controllable effectiveness evaluation of this method. Summary of the invention

[0005] In order to solve the problem of the lack of equipment in the prior art that can be used for indoor simulation experiments on the annulus closure pressure of nitrogen-containing gas columns in strong production and injection gas storage wells, the present application provides a simulation experiment device for the annulus closure pressure of nitrogen-containing gas columns in strong production and injection gas storage wells.

[0006] The present application provides a nitrogen-containing gas column strong production and strong injection gas storage well annulus trap pressure simulation experimental device, which adopts the following technical solutions:

[0007] A nitrogen-containing gas column strong production and strong injection gas storage well annulus closed pressure simulation experimental device comprises a high-temperature and high-pressure kettle body, a high-temperature and high-pressure kettle cover is arranged on the high-temperature and high-pressure kettle body, a tubing sample is fixedly connected to the inside of the high-temperature and high-pressure kettle body, a separator is horizontally arranged on the outside of the tubing sample inside the high-temperature and high-pressure kettle body, a venting pipeline for venting is also arranged on the high-temperature and high-pressure kettle body, a pressure control system for controlling pressure and a data acquisition system for analyzing the internal situation data of the high-temperature and high-pressure kettle body are arranged on the high-temperature and high-pressure kettle body.

[0008] Optionally, the separator is a rubber piston plate, which is nested between the oil pipe sample and the high-temperature and high-pressure kettle body, and the rubber piston plate is used to separate the space between the inner wall of the high-temperature and high-pressure kettle body and the outer wall of the oil pipe sample into an annular space above the rubber piston plate and a pressurized chamber space below the rubber piston plate.

[0009] Optionally, the vent pipeline includes an inner vent pipeline in the oil pipe which is relatively connected to the oil pipe sample, and an inner vent valve is arranged on the inner vent pipeline in the oil pipe; the position of the high-temperature and high-pressure kettle body relative to the annular space is relatively connected to an inner vent pipeline in the annulus, and an inner vent valve is arranged on the inner vent pipeline in the annulus; the position of the high-temperature and high-pressure kettle body relative to the pressurized chamber space is provided with a pressurized chamber vent pipeline, and a pressurized chamber vent valve is arranged on the pressurized chamber vent pipeline.

[0010] Optionally, an electronic pressure gauge in the oil pipe is arranged on the oil pipe vent line between the oil pipe vent valve and the oil pipe sample; an electronic pressure gauge in the annulus is arranged on the annulus vent line between the annulus vent valve and the annular space; and an electronic pressure gauge in the pressurized chamber is arranged on the pressurized chamber vent line between the pressurized chamber vent valve and the pressurized chamber.

[0011] Optionally, the data acquisition system includes a computing device, an electronic thermometer in the tubing is arranged inside the tubing sample, an electronic thermometer in the annulus is arranged inside the annular space, and the electronic thermometer in the tubing, the electronic thermometer in the annulus, the electronic pressure gauge in the tubing and the electronic pressure gauge in the annulus are all connected to the computing device in terms of relative signals.

[0012] Optionally, the pressure control system includes a gas cylinder, and the gas cylinder is relatively connected to the high-temperature and high-pressure autoclave body through a gas injection pipeline, and the gas injection pipeline is provided with a master control valve for controlling the working state of the gas cylinder.

[0013] Optionally, the gas injection pipeline includes a main control section connected to one end of the gas cylinder, a section of the main control section away from the gas cylinder is fixedly connected to a first sub-control section connected to the top of the partition, the end of the main control section away from the gas cylinder is also fixedly connected to a second sub-control section connected to the bottom of the partition, and the end of the main control section away from the gas cylinder is also fixedly connected to a third sub-control section connected to the inside of the oil pipe sample, the first sub-control section is provided with an annular gas injection valve for controlling the opening, the second sub-control section is provided with a pressurized chamber gas injection valve for controlling the opening, and the third sub-control section is provided with an oil pipe gas injection valve for controlling the opening.

[0014] Optionally, the third sub-control section is also fixedly connected to a spiral heating tank, and the spiral heating tank can heat the gas entering into the oil pipe sample.

[0015] Optionally, the outer side of the high-temperature and high-pressure autoclave body is provided with a thermal insulation sleeve.

[0016] Optionally, the high-temperature and high-pressure autoclave body and the high-temperature and high-pressure autoclave cover are both made of high-strength alloy steel to meet the airtight working pressure of 0-70MPa and the standard working temperature of 0-200°C.

[0017] In summary, the present application includes at least one of the following beneficial technical effects:

[0018] 1. The interior of the high-temperature and high-pressure autoclave is divided into an annular space and a pressurized chamber space by the annular rubber piston plate in the main structure, and the pressure control system is set up to control the pressure inside the tubing sample, the annular space and the pressurized chamber space respectively, and then the pressure signal and temperature signal collected by the data acquisition system are tested and analyzed.

[0019] 2. By changing the temperature and pressure of the gas inside the tubing sample through the pressure control system, the dynamic changes of the annular closure pressure under different gas injection or gas production conditions can be simulated. By changing the pressure inside the pressurized cavity space through the pressure control system, the changes of the closure pressure under different annular initial pressures can be simulated. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of a nitrogen-containing gas column strong production and injection gas storage well annulus closure pressure simulation experimental device in the embodiment of the present application.

[0021] Explanation of the reference numerals: 1. Main structure; 11. High-temperature and high-pressure autoclave body; 12. High-temperature and high-pressure autoclave cover; 13. Oil pipe sample; 14. Thermal insulation sleeve; 15. Rubber piston plate; 16. Annular space; 17. Pressurized chamber space; 18. Vent line in the oil pipe; 181. Vent valve in the oil pipe; 182. Electronic pressure gauge in the oil pipe; 19. Vent line in the annulus; 191. Vent valve in the annulus; 192. Electronic pressure gauge in the annulus; 110. Vent line in the pressurized chamber; 1101. Vent valve in the pressurized chamber; 1102. Electronic pressure gauge in the cavity; 2. Pressure control system; 21. Gas cylinder; 22. Gas injection pipeline; 221. Main control section; 2211. Main control valve; 2212. Gas cylinder pressure gauge; 222. First sub-control section; 2221. Gas injection valve in the annulus; 223. Second sub-control section; 2231. Gas injection valve in the pressurized cavity; 224. Third sub-control section; 2241. Gas injection valve in the oil pipe; 2242. Spiral heating tank; 3. Data acquisition system; 31. External computer; 32. Electronic thermometer in the oil pipe; 33. Electronic thermometer in the annulus. DETAILED DESCRIPTION

[0022] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0024] The following is combined with Figure 1 This application is described in further detail.

[0025] The present application embodiment discloses a nitrogen-containing gas column strong production and strong injection gas storage well annulus trap pressure simulation experimental device. Figure 1 A nitrogen-containing gas column strong extraction and strong injection gas storage well annulus closure pressure simulation experimental device includes a main structure 1, a pressure control system 2 for adjusting the internal pressure of the main structure 1 is arranged on one side of the main structure 1, and a data acquisition system 3 for collecting and analyzing data inside the main structure 1.

[0026] The main structure 1 includes a high-temperature autoclave body 11 with a hollow cylindrical structure, and a high-temperature autoclave cover 12 is horizontally fixedly connected to the top of the high-temperature autoclave body 11, and the high-temperature autoclave cover 12 seals the high-temperature autoclave body 11. An oil pipe sample 13 is coaxially arranged inside the high-temperature autoclave body 11, and the oil pipe sample 13 is a hollow cylindrical structure. The high-temperature autoclave body 11 and the high-temperature autoclave cover 12 are both made of high-strength alloy steel, which can meet the airtight working pressure of 0-70MPa and the standard working temperature of 0-200℃.

[0027] The outer coaxial sleeve of the high temperature and high pressure kettle body 11 is provided with a heat preservation and heat insulation sleeve 14, and the heat preservation and heat insulation sleeve 14 is fixedly connected to the high temperature and high pressure kettle body 11. The heat preservation and heat insulation sleeve 14 is provided to reduce the temperature dissipation inside the high temperature and high pressure kettle body 11.

[0028] A rubber piston plate 15 is coaxially arranged between the inner side wall of the high temperature and high pressure kettle body 11 and the outer side wall of the oil pipe sample 13. The rubber piston plate 15 is a circular ring structure and is nested between the oil pipe sample 13 and the high temperature and high pressure kettle body 11. The rubber piston plate 15 divides the area between the inner side wall of the high temperature and high pressure kettle body 11 and the outer side wall of the oil pipe sample 13 into two parts, including an annular space 16 located above the rubber piston plate 15 and a pressurized chamber space 17 located below the rubber piston plate 15.

[0029] An inner vent line 18 is vertically arranged on the high-temperature and high-pressure autoclave cover 12, one end of which is relatively connected to the inside of the oil pipe sample 13, and the other end of which is relatively connected to the outside. An inner vent valve 181 is fixedly connected to the inner vent line 18, and the inner vent valve 181 can adjust the opening and closing of the inner vent line 18. An inner electronic pressure gauge 182 is fixedly connected to the inner vent line 18 between the inner vent valve 181 and the high-temperature and high-pressure autoclave cover 12, and the inner electronic pressure gauge 182 can monitor the pressure inside the oil pipe sample 13.

[0030] An annular vent line 19 is horizontally arranged on the side wall of the high-temperature and high-pressure autoclave body 11 relative to the position of the annular space 16. One end of the annular vent line 19 extends into the interior of the annular space 16 and is relatively connected, and the other end is relatively connected to the outside. An annular vent valve 191 is fixedly connected to the annular vent line 19, and the annular vent valve 191 can adjust the opening and closing of the annular vent line 19. An annular electronic pressure gauge 192 is arranged on the annular vent line 19 between the annular vent valve 191 and the high-temperature and high-pressure autoclave body 11, and the annular electronic pressure gauge 192 can monitor the pressure inside the annular space 16.

[0031] A pressurized chamber vent line 110 is horizontally arranged on the side wall of the high-temperature and high-pressure autoclave body 11 relative to the position of the pressurized chamber space 17. One end of the pressurized chamber vent line 110 extends into the interior of the pressurized chamber space 17, and the other end is relatively connected to the outside. A pressurized chamber vent valve 1101 is fixedly connected to the pressurized chamber vent line 110, and the pressurized chamber vent valve 1101 can adjust the opening and closing of the pressurized chamber vent line 110. The pressurized chamber vent line 110 is provided with a pressurized chamber electronic pressure gauge 1102 between the pressurized chamber vent valve 1101 and the high-temperature and high-pressure autoclave body 11, and the pressurized chamber electronic pressure gauge 1102 can monitor the pressure inside the pressurized chamber.

[0032] The pressure control system 2 is located at the gas cylinder 21 on one side of the high-temperature and high-pressure autoclave body 11. The gas cylinder 21 is relatively connected to the high-temperature and high-pressure autoclave body 11 through the gas injection pipeline 22, and the gas injection pipeline 22 includes a master control section 221 that is relatively connected to the gas cylinder 21. The master control valve 2211 is fixedly connected to the master control section 221, and the master control valve 2211 can control the gas injection of the gas cylinder 21. The master control section 221 is located between the master control valve 2211 and the gas cylinder 21. The pressure gauge of the gas cylinder 21 can display the current residual pressure value of the gas cylinder 21.

[0033] The first sub-control section 222 is fixedly connected to the side of the main control section 221 away from the gas cylinder 21. The first sub-control section 222 is relatively connected to the main control section 221, and the first sub-control section 222 is relatively connected to the annular space 16 inside the high-temperature and high-pressure autoclave body 11, so that the gas inside the gas cylinder 21 can enter the inside of the annular space 16. The first sub-control section 222 is fixedly connected to the annular space gas injection valve 2221, and the speed of gas injection and pressurization inside the annular space 16 can be adjusted by controlling the opening of the annular space gas injection valve 2221.

[0034] The second sub-control section 223 is also fixedly connected to the side of the main control section 221 away from the gas cylinder 21. The second sub-control section 223 is relatively connected to the main control section 221, and the second sub-control section 223 is relatively connected to the pressurized chamber space 17 inside the high-temperature and high-pressure autoclave body 11, so that the gas inside the gas cylinder 21 can enter the pressurized chamber space 17. The second sub-control section 223 is fixedly connected to the pressurized chamber gas injection valve 2231, and the speed of gas injection and pressurization inside the pressurized chamber space 17 can be adjusted by controlling its opening.

[0035] A third sub-control section 224 is also fixedly connected to the side of the main control end facing away from the gas cylinder 21. One end of the third sub-control section 224 is relatively connected to the gas cylinder 21, and the other end of the third sub-control section 224 is relatively connected to the interior of the oil pipe sample 13. In addition, an oil pipe gas injection valve 2241 is fixedly connected to the third sub-control section 224. The oil pipe gas injection valve 2241 can adjust the speed of gas injection and pressurization inside the oil pipe sample 13 by controlling its opening.

[0036] The third sub-control section 224 is located in the oil pipe and is fixedly connected to a spiral heating tank 2242 on one side of the gas injection valve 2241 close to the gas cylinder 21. The spiral heating tank 2242 can heat the gas inside the third sub-control section 224, and then transport the heated gas into the oil pipe sample 13, so that the temperature of the gas inside the oil pipe sample 13 rises, simulating the high temperature environment inside the wellbore.

[0037] The data acquisition system 3 includes an external computer 31, and the position of the high-temperature and high-pressure autoclave cover 12 located inside the oil pipe sample 13 is fixedly connected to an electronic thermometer 32 in the oil pipe, and the position of the high-temperature and high-pressure autoclave cover 12 located inside the annular space 16 is fixedly connected to an electronic thermometer 33 in the annular space. The electronic thermometer 32 in the oil pipe, the electronic thermometer 33 in the annular space, the electronic pressure gauge 182 in the oil pipe, and the electronic pressure gauge 192 in the annular space are all connected to the external computer 31 through signals, so that the external computer 31 can collect the readings of each temperature and pressure gauge for test data analysis.

[0038] When testing the pressure control effect of the annular nitrogen column under the injection-production condition. First, determine the temperature and pressure value in the tubing sample 13 and the initial pressure value in the annular space 16 under the corresponding working conditions. Inject the prepared annular liquid into the annular space 16, cover the high-temperature and high-pressure autoclave cover 12, then open the master control valve 2211 and the annular gas injection valve 2221, and control the opening of the annular gas injection valve 2221. After injecting a predetermined amount of nitrogen, close the annular gas injection valve 2221. Open the pressurized cavity gas injection valve 2231, and monitor the reading of the electronic pressure gauge 192 in the annular space through the external computer 31. After it reaches the predetermined value, close the pressurized cavity gas injection valve 2231. Then, the spiral heating tank 2242 and the gas injection valve 2241 in the tubing are opened to inject the heated high-pressure gas into the tubing sample 13. The readings of the electronic pressure gauge 182 and the electronic thermometer 32 in the tubing are monitored by the external computer 31. After the readings reach the predetermined values, the gas injection valve 2241 in the tubing is closed. By monitoring the pressure and temperature changes in the annular space 16 during the temperature and pressure increase process in the tubing sample 13, the annular space closed pressure control effect under the working condition can be determined.

[0039] When testing the thermal expansion coefficient of the annular liquid, first fill the annular space 16 with the prepared annular liquid, and cover the high-temperature and high-pressure autoclave cover 12, then open the master control valve 2211, the spiral heating tank 2242 and the gas injection valve 2241 in the oil pipe, inject the heated high-pressure gas into the oil pipe sample 13, monitor the readings of the electronic pressure gauge 192 and the electronic thermometer 33 in the annular space through the external computer 31, and then calculate the volume change through the reading of the electronic pressure gauge 1102 in the pressurized chamber, and the thermal expansion coefficient of the annular liquid can be obtained.

[0040] When testing the annular space liquid compressibility coefficient, first fill the annular space 16 with the prepared annular space liquid, cover the high-temperature and high-pressure autoclave cover 12, then open the master control valve 2211 and the pressurized chamber gas injection valve 2231, inject high-pressure gas into the pressurized chamber space 17, monitor the reading of the electronic pressure gauge 192 in the annular space through the external computer 31, and then calculate the volume change through the reading of the electronic pressure gauge 1102 in the pressurized chamber, and then get the annular space liquid compressibility coefficient.

[0041] The implementation principle of the annular space closed pressure simulation experimental device for the strong extraction and injection of nitrogen-containing gas columns in the embodiment of the present application is as follows: the interior of the high-temperature and high-pressure kettle body 11 is divided into an annular space 16 and a pressurized chamber space 17 by the annular rubber piston plate 15 in the main structure 1, and the pressure control system 2 is set to control the pressure inside the oil pipe sample 13, the annular space 16 and the pressurized chamber space 17 respectively, and then the pressure signal and temperature signal collected by the data acquisition system 3 are tested and analyzed.

[0042] In the present invention, the term "plurality" means at least two or more than two, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0043] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A nitrogen-containing gas column strong production and strong injection gas storage well annulus trap pressure simulation experimental device, characterized in that: The invention comprises a high-temperature and high-pressure kettle body (11), a high-temperature and high-pressure kettle cover (12) is arranged on the high-temperature and high-pressure kettle body (11), an oil pipe sample (13) is fixedly connected to the inside of the high-temperature and high-pressure kettle body (11), a partition is arranged horizontally on the outside of the oil pipe sample (13) inside the high-temperature and high-pressure kettle body (11), a venting pipeline for venting is also arranged on the high-temperature and high-pressure kettle body (11), a pressure control system (2) for controlling pressure and a data acquisition system (3) for analyzing the internal situation data of the high-temperature and high-pressure kettle body (11) are arranged on the high-temperature and high-pressure kettle body (11).

2. According to claim 1, a nitrogen-containing gas column strong production and strong injection gas storage well annulus trap pressure simulation experimental device is characterized by: The separator is a rubber piston plate (15), and the rubber piston plate (15) is nested between the oil pipe sample (13) and the high-temperature and high-pressure kettle body (11). The rubber piston plate (15) divides the space between the inner wall of the high-temperature and high-pressure kettle body (11) and the outer wall of the oil pipe sample (13) into an annular space (16) located above the rubber piston plate (15) and a pressurized chamber space (17) located below the rubber piston plate (15).

3. According to claim 2, a nitrogen-containing gas column strong production and strong injection gas storage well annulus trap pressure simulation experimental device is characterized by: The vent pipeline comprises an inner vent pipeline (18) in oil pipe which is in relative communication with the oil pipe sample (13), and an inner vent valve (181) is arranged on the inner vent pipeline (18); an inner vent pipeline (19) in annular space is in relative communication with the position of the high-temperature and high-pressure kettle body (11) relative to the annular space (16), and an inner vent valve (191) is arranged on the inner vent pipeline (19); a pressurized chamber vent pipeline (110) is arranged on the position of the high-temperature and high-pressure kettle body (11) relative to the pressurized chamber space (17), and a pressurized chamber vent valve (1101) is arranged on the pressurized chamber vent pipeline (110).

4. According to claim 3, a nitrogen-containing gas column strong production and strong injection gas storage well annulus trap pressure simulation experimental device is characterized by: An electronic pressure gauge (182) is provided on the oil pipe vent line (18) between the oil pipe vent valve (181) and the oil pipe sample (13); an electronic pressure gauge (192) is provided on the annulus vent line (19) between the annulus vent valve (191) and the annular space (16); and an electronic pressure gauge (1102) is provided on the pressurized chamber vent line (110) between the pressurized chamber vent valve (1101) and the pressurized chamber space (17).

5. According to claim 4, a nitrogen-containing gas column strong production and strong injection gas storage well annulus trap pressure simulation experimental device is characterized by: The data acquisition system (3) includes a computing device, an electronic thermometer (32) in the tubing is disposed inside the tubing sample (13), an electronic thermometer (33) in the annulus is disposed inside the annular space (16), and the electronic thermometer (32) in the tubing, the electronic thermometer (33) in the annulus, the electronic pressure gauge (182) in the tubing, and the electronic pressure gauge (192) in the annulus are all connected to the computing device in terms of signals.

6. The annular trap pressure simulation experimental device for a nitrogen-containing gas column strong production and injection gas storage well according to claim 1, characterized in that: The pressure control system (2) comprises a gas cylinder (21), the gas cylinder (21) and the high-temperature and high-pressure autoclave body (11) are relatively connected via a gas injection pipeline (22), and the gas injection pipeline (22) is provided with a master control valve (2211) for controlling the working state of the gas cylinder (21).

7. The annular trap pressure simulation experimental device for a nitrogen-containing gas column strong production and injection gas storage well according to claim 6, characterized in that: The gas injection pipeline (22) comprises a main control section (221) connected to one end of the gas cylinder (21); a section of the main control section (221) away from the gas cylinder (21) is fixedly connected to a first sub-control section (222) connected to the upper part of the partition; an end of the main control section (221) away from the gas cylinder (21) is also fixedly connected to a second sub-control section (223) connected to the lower part of the partition; and a section of the main control section (221) away from the gas cylinder (21) is fixedly connected to a second sub-control section (223) connected to the lower part of the partition. One end of the gas cylinder (21) is also fixedly connected to a third sub-control section (224) connected to the inside of the oil pipe sample (13); the first sub-control section (222) is provided with an annular air injection valve (2221) for controlling the opening; the second sub-control section (223) is provided with a pressurized chamber air injection valve (2231) for controlling the opening; and the third sub-control section (224) is provided with an oil pipe air injection valve (2241) for controlling the opening.

8. The annular trap pressure simulation experimental device for a nitrogen-containing gas column strong production and injection gas storage well according to claim 7, characterized in that: The third sub-control section (224) is also fixedly connected to a spiral heating tank (2242), and the spiral heating tank (2242) is capable of heating the gas entering the interior of the oil pipe sample (13).

9. The annular trap pressure simulation experimental device for a nitrogen-containing gas column strong production and injection gas storage well according to claim 1, characterized in that: The outer side of the high-temperature and high-pressure kettle body (11) is provided with a heat-insulating jacket (14).

10. The annular trap pressure simulation experimental device for a nitrogen-containing gas column strong production and injection gas storage well according to claim 1, characterized in that: The high-temperature and high-pressure autoclave body (11) and the high-temperature and high-pressure autoclave cover (12) are both made of high-strength alloy steel, meeting the requirements of a gas-tight working pressure of 0-70 MPa and a standard working temperature of 0-200°C.

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