A salt cavern storage simulation test device and test method

Abstract

The application discloses a salt cavern storage simulation test device and a test method, and belongs to the technical field of salt cavern storage applications.The salt cavern storage simulation test device comprises a pressure-resistant kettle, a salt wall lining is arranged in the pressure-resistant kettle, a storage medium is stored in the salt wall lining, a heating device is arranged on the outer wall of the pressure-resistant kettle, the pressure-resistant kettle is further connected with a sampling device and a pressure system for simulating a high-pressure environment of the salt cavern storage.The salt cavern storage simulation test device and the test method can simulate a high-temperature and high-pressure environment of an underground salt cavern, restore the environment of a sample in the salt cavern, truly reflect the storage condition of the storage medium in the salt cavern, and provide technical support for the design and construction of a salt cavern storage site and the optimization of process control parameters by studying the physical properties of the tested sample.

Description

Technical Field

[0001] This invention relates to the field of salt cavern storage application technology, specifically to a salt cavern storage simulation test device and test method. Background Technology

[0002] Currently, underground salt caverns are one of the main methods of energy storage. Salt caverns serve not only as storage bases for oil and gas but also for storing grains, industrial waste, air, hydrogen, nitrogen, carbon dioxide, and more. Internationally, there is limited data available on the changes in the properties of the storage medium in salt caverns, while domestic research is still in its early stages. Simulation experiments have been conducted primarily focusing on cavern construction, cavity stability, and brine column crystallization, with limited research on the properties of the storage medium itself. Changes in the properties of the storage medium within salt caverns have a significant impact on the stability and operational safety of the storage facility. Domestic salt cavern construction started relatively late, and the investment in surface construction such as cavity building is substantial. The changes in the properties of the storage medium stored long-term within the salt caverns are still unclear, and there is a lack of effective indoor simulation testing equipment. Whether long-term storage will produce harmful effects is unknown; therefore, thorough feasibility studies are necessary in the early stages of construction.

[0003] Research on the changes in the properties of the storage medium in salt cavern storage needs to be based on the actual geological and production conditions on site. A large-scale salt cavern model device should be made using artificial materials with similar physical and mechanical properties to natural mineral rocks. Different storage media should be stored in the model to simulate the entire storage process, optimize the process parameters, predict its adverse effects, and take measures to intervene and resolve them in advance.

[0004] Patent CN103743534B discloses a dynamic characteristic model test device for a water-soluble cavity-forming tubing column in a salt cavern oil storage tank. Specifically, the device in this patent can realistically reflect the dynamic characteristics of the tubing column under the action of water flow in the cavity. Patent CN107218018A discloses a crystallization simulation test device and method for a brine discharge tubing column in a salt cavern gas storage tank. Specifically, the device in this patent can simulate the brine discharge conditions of a salt cavern gas storage tank. By changing the initial brine temperature, brine properties, discharge flow rate, reducing the temperature of the discharge tubing column, and adjusting the tubing material and surface characteristics, it simulates the crystallization phenomenon of the discharge tubing column under various working conditions. Neither of these patents can be used to simulate the storage conditions of the storage medium in salt caverns. They lack understanding of the impact of changes in the properties of the storage medium in salt caverns and cannot implement targeted preventative measures for the produced medium. Therefore, it is essential to establish an indoor salt cavern simulation device to simulate changes in its storage medium. Summary of the Invention

[0005] The purpose of this invention is to provide a salt cavern storage simulation test device and test method to solve the technical problem that existing salt cavern storage simulation test devices cannot simulate the changes in the properties of the storage medium inside the storage tank.

[0006] To achieve the above objectives, one embodiment of the present invention provides a salt cavern storage simulation test device, including a pressure vessel, an inner salt wall liner inside the pressure vessel, a storage medium stored inside the salt wall liner, a heating device on the outer wall of the pressure vessel, and a sampling device and a pressure system for simulating the high-pressure environment of a salt cavern storage tank.

[0007] In one preferred embodiment of the present invention, the sampling device includes a sampling telescopic sleeve and a plurality of sampling units connected to the sampling telescopic sleeve.

[0008] In one preferred embodiment of the present invention, the sampling telescopic sleeve includes a first sleeve, a second sleeve is fitted on the outer wall of the first sleeve, a first connecting pipe is connected to the second sleeve, a third sleeve is fitted on the outer wall of the second sleeve, an outer shell is fitted on the outer wall of the third sleeve, and the third sleeve is also connected to the second connecting pipe, with the first and second connecting pipes penetrating through the outer shell.

[0009] One preferred embodiment of the present invention is characterized in that: each sampling unit includes a sampling tube connected to a sampling telescopic sleeve, a sampling bottle is connected to the end of the sampling tube away from the sampling telescopic sleeve, and a flow meter and a peristaltic pump are also provided on the sampling tube.

[0010] In one preferred embodiment of the present invention, the heating device includes a heating belt sleeved on the outer wall of the pressure vessel, and the heating belt is connected to a temperature control device.

[0011] In one preferred embodiment of the present invention, the temperature control device includes a thermocouple, one end of which is located inside the salt wall lining, and the other end is connected to a temperature control box, which is connected to a heating belt.

[0012] In one preferred embodiment of the present invention, the pressure system includes a trachea, one end of which is connected to a gas cylinder, and the other end of which is located inside the salt wall lining.

[0013] In one preferred embodiment of the present invention, a valve is provided on the trachea.

[0014] In one preferred embodiment of the present invention, the pressure vessel is equipped with a pressure gauge and a pressure relief valve.

[0015] Based on the salt cavern storage simulation test device disclosed in this invention, this invention also discloses a salt cavern storage simulation test method, comprising the following steps:

[0016] Heating pressure vessel;

[0017] After the pressure vessel is heated, it is filled with storage medium and then pressurized.

[0018] After pressurization is completed, sampling is performed;

[0019] The physical properties of the sampled substances are tested.

[0020] In one preferred embodiment of the present invention, the pressure vessel needs to be pretreated before heating.

[0021] One preferred embodiment of the present invention includes pretreatment including airtightness testing of the simulation test device, venting of the pressure vessel, and cleaning of the salt wall lining.

[0022] In summary, the beneficial effects of the present invention are as follows:

[0023] 1. The salt cavern storage simulation test device of the present invention simulates the high-temperature environment of the salt cavern storage through a heating device and the high-pressure environment of the salt cavern storage through a pressure system. At the same time, it samples the storage medium stored in the salt wall lining through a sampling device and performs physical property testing on the sampled substances. Based on the physical property testing results, it observes the changes in the properties of the storage medium, thus solving the problem that the salt cavern storage simulation test device in the prior art cannot simulate the changes in the properties of the storage medium in the storage.

[0024] 2. The salt cavern storage simulation test device and test method of the present invention can simulate the high temperature and high pressure environment of underground salt caverns, restore the environment of the sample in the salt cavern, and truly reflect the storage conditions of the storage medium in the salt cavern. By studying the physical properties of the extracted test, it provides technical support for the design and construction of salt cavern storage sites and the optimization of process control parameters.

[0025] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention will be apparent from the effects described in the description and the accompanying drawings. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the salt cavern storage simulation test device in this invention;

[0027] Figure 2 This is a schematic diagram of the sampling telescopic sleeve in this invention;

[0028] Figure 3 This is a schematic diagram of the process for simulating salt cavern storage in this invention.

[0029] Among them, 1-pressure resistant vessel, 2-salt wall lining, 3-heating belt, 4-vessel lid, 5-sampling telescopic sleeve, 6-thermocouple, 7-pressure gauge, 8-pressure relief valve, 9-valve, 10-flow meter, 11-gas cylinder, 12-sampling bottle, 13-peristaltic pump, 14-nut, 15-temperature control box, 16-gas pipe, 17-sampling tube, 18-first sleeve, 19-first connecting pipe, 20-second sleeve, 21-third sleeve, 22-second connecting pipe, 23-outer shell. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] This invention provides a salt cavern storage simulation test device, such as... Figure 1 As shown, the apparatus includes a pressure vessel 1. The pressure vessel 1 comprises a vessel body and a vessel cover 4, which are connected by a flange. A nut 14 is installed on the flange, and a sealing strip is installed between the vessel body and the vessel cover 4 to ensure the airtightness of the pressure vessel 1. The pressure vessel 1 can withstand a pressure of 20 MPa. The vessel body is made of Hastelloy alloy or other steel (such as 316, 316L), and the inner wall is coated with polytetrafluoroethylene (PTFE).

[0032] The pressure vessel 1 is internally equipped with a salt wall liner 2, which is a cylindrical cavity formed by grinding large salt rocks. The salt body is selected based on the chosen geological conditions or locally sourced salt, and ground into a cylindrical cavity with a wall thickness of 2cm-5cm before being placed in the pressure vessel 1. Alternatively, the salt body can be customized according to experimental requirements; for example, in cavity-building experiments, a solid cylindrical salt body of appropriate size can be ground and placed in the vessel. The salt wall liner 2 stores a storage medium, which can be liquid or gas.

[0033] The outer wall of the pressure vessel 1 is equipped with a heating device to simulate the high-temperature environment of a salt cavern storage facility. This heating device includes a heating belt 3 fitted onto the outer wall of the pressure vessel 1. The heating belt 3 is a constant-temperature heating belt, and it is connected to a temperature control device for controlling the temperature of the pressure vessel 1. The temperature control device includes a thermocouple 6, which is used to monitor temperature changes inside the pressure vessel 1 in real time. One end of the thermocouple 6 is located inside the salt wall lining 2, and the other end is connected to a temperature control box 15, which is connected to the heating belt 3. The heating belt 3 is wound around the outer wall of the pressure vessel 1. Multiple layers can be used depending on the formation temperature range. The thermocouple 6 is connected to the temperature control box 15 to control the outer wall temperature to simulate formation temperature changes. The recommended formation temperature is 45℃-60℃, but the specific temperature can be calculated based on the temperature at different formation depths.

[0034] The pressure vessel 1 is also connected to a sampling device for sampling the stored medium and a pressure system for simulating the high-pressure environment of a salt cavern storage tank. The sampling device includes a sampling telescopic sleeve 5 and three sampling units connected to the sampling telescopic sleeve 5. For example... Figure 2As shown, the sampling telescopic sleeve 5 includes a first sleeve 18, a second sleeve 20 fitted onto the outer wall of the first sleeve 18, a first connecting pipe 19 connected to the second sleeve 20, a third sleeve 21 fitted onto the outer wall of the second sleeve 20, and an outer shell 23 fitted onto the outer wall of the third sleeve 21. The third sleeve 21 is also connected to a second connecting pipe 22. The first connecting pipe 19 and the second connecting pipe 22 penetrate the outer shell 23. The first connecting pipe 19, the second connecting pipe 22, and the upper part of the first sleeve 18 are respectively connected to the sampling unit. The wall of the sampling telescopic sleeve 5 is provided with a spiral for telescopic adjustment.

[0035] Each sampling unit includes a sampling tube 17 connected to a sampling telescopic sleeve 5. The sampling tube 17 is a soft silicone tube. A sampling bottle 12 is connected to the end of the sampling tube 17 furthest from the sampling telescopic sleeve 5. A flow meter 10 and a peristaltic pump 13 are also installed on the sampling tube 17. The flow meter 10 and the peristaltic pump 13 can quantitatively adjust the flow rate of gas or liquid pumped in and out. A sampling valve is also installed on the sampling tube 17 to control the opening and closing of the sampling process.

[0036] The pressure system includes a gas pipe 16, one end of which is connected to a gas cylinder 11 containing gas such as nitrogen, natural gas, or hydrogen. The other end of the gas pipe 16 is located inside the salt wall lining 2. A valve 9 and a flow meter 10 are installed on the gas pipe 16, and the flow meter 10 is used to control the gas flow rate.

[0037] The pressure vessel 1 is equipped with a pressure gauge 7 and a pressure relief valve 8. The pressure gauge 7 is used to monitor the pressure inside the pressure vessel 1. When the pressure gauge 7 reaches the specified pressure, the valve 9 on the gas pipe 16 is closed to stop the gas intake. When the pressure inside the pressure vessel 1 exceeds the maximum pressure of 20 MPa, the pressure vessel 1 automatically releases pressure through the pressure relief valve 8, thereby ensuring the safe operation of the instrument. The pressure system is generally regulated between 1 MPa and 18 MPa.

[0038] The working principle of the salt cavern storage simulation test device: The salt cavern storage simulation test device of the present invention simulates the high temperature environment of the salt cavern storage through a heating device, simulates the high pressure environment of the salt cavern storage through a pressure system, and then samples the storage medium stored in the salt wall lining 2 through a sampling device, and performs physical property testing on the sampled substances, and observes the changes in the properties of the storage medium based on the physical property test results.

[0039] A method for simulating salt cavern storage tests is implemented based on the aforementioned salt cavern storage simulation test apparatus, such as... Figure 3 As shown, it includes the following steps:

[0040] Step (1): Heating the pressure vessel 1; Specifically, set the temperature of the temperature control device to the required test temperature, and heat the pressure vessel 1 through the heating belt 3 until the pressure vessel 1 reaches a constant temperature; Before heating the pressure vessel 1, it is necessary to pre-treat the pressure vessel 1, which includes testing the airtightness of the simulated test device, purging the pressure vessel 1, and cleaning the salt wall lining 2, specifically:

[0041] Air tightness test: Install the pressure vessel 1, connect the air inlet of the air pipe 16 to the N2 gas cylinder 11, fill with gas and close the valve 9 on the air pipe 16 to maintain constant pressure. Observe the change of the pointer of the pressure gauge 7. If the pointer of the pressure gauge 7 does not change, it means that the pressure vessel 1 has good air tightness and the test can begin.

[0042] Venting the pressure vessel 1 and cleaning the salt wall lining 2: Disconnect the gas cylinder 11, open the valve 9 on the gas pipe 16 to release the gas in the pressure vessel 1, ensure that the pressure in the pressure vessel 1 is zero, open the lid 4 of the pressure vessel 1, and clean the salt wall lining 2 cavity in the pressure vessel 1 with brine.

[0043] Step (2): After the pressure vessel 1 is heated, fill it with storage medium and pressurize it. Specifically: After the pressure vessel 1 is heated, fill the vessel cavity with storage medium (the storage medium can be liquid or gas), close the lid 4 of the pressure vessel 1, close the sampling valves in the three sampling units, open the valve 9 on the gas pipe 16, connect the gas cylinder 11, pressurize it to the pressure required for the test, and close the valve 9.

[0044] Step (3): After pressurization, sampling is carried out; specifically, sampling is carried out at different storage times according to the test requirements. When sampling, if the storage medium is liquid, the temperature inside the pressure vessel 1 should be adjusted to a suitable temperature first, and then the pressure inside the pressure vessel 1 should be emptied. The specific method for emptying the pressure is as follows: open the sampling valves corresponding to the upper, middle and lower layers connected to the pressure vessel 1 in sequence, and use the sampling tube 17 to connect the peristaltic pump 13 for quantitative sampling.

[0045] Step (4): Perform physical property testing on the sampled substance.

[0046] If the test is to be carried out continuously, gas needs to be introduced into the pressure vessel 1 to ensure the pressure inside the vessel; specifically, after sampling is completed, the sampling valve on the sampling tube 17 in the sampling unit is closed, and the valve 9 on the gas pipe 16 is opened to introduce the corresponding gas to ensure that the pressure inside the pressure vessel 1 is the test pressure until the test is over.

[0047] Depending on the storage medium, the simulation test method for salt cavern storage can be as follows:

[0048] When the storage medium is liquid:

[0049] a) Install the pressure vessel 1, connect the air inlet of the gas pipe 16 to the N2 gas cylinder 11, fill with gas and close the valve 9 on the gas pipe 16 to maintain constant pressure. Observe the change of the pointer of the pressure gauge 7. If the pointer of the pressure gauge 7 does not change, it means that the pressure vessel 1 has good airtightness and the test can begin.

[0050] b) Disconnect gas cylinder 11, open valve 9 on gas pipe 16 to release gas from pressure vessel 1, ensure that the pressure inside pressure vessel 1 is zero, open the lid 4 of pressure vessel 1, clean the salt wall lining 2 cavity inside pressure vessel 1 with brine, set the temperature of the temperature control device to the temperature required for the test, and heat pressure vessel 1 through heating belt 3 to make pressure vessel 1 reach a constant temperature.

[0051] c) Fill the pressure vessel 1 with storage medium, such as oil and brine (the ratio of oil and brine depends on the test conditions), close the lid 4 of the pressure vessel 1, close the sampling valves in the three sampling units, open the valve 9 on the gas pipe 16 to connect to the gas cylinder 11, pressurize to the required test pressure, and close the valve 9.

[0052] d) Sampling was carried out at different storage times according to the test requirements. When sampling, the temperature inside the pressure vessel 1 was first adjusted to a suitable temperature, and then the pressure inside the pressure vessel 1 was emptied. The sampling valves corresponding to the upper, middle and lower layers were opened in sequence. The sampling tube 17 was connected to the peristaltic pump 13 for quantitative sampling. The sampled substances were subjected to corresponding physical property tests such as density, salt content, viscosity, and freezing point.

[0053] e) After sampling is completed, close the sampling valve on the sampling tube 17 in the sampling unit, open the valve 9 on the gas tube 16 to fill in the corresponding gas, and ensure that the pressure inside the pressure vessel 1 is the test pressure until the test is over.

[0054] When the storage medium is gas:

[0055] a) Install the pressure vessel 1, connect the air inlet of the gas pipe 16 to the N2 gas cylinder 11, fill with gas and close the valve 9 on the gas pipe 16 to maintain constant pressure. Observe the change of the pointer of the pressure gauge 7. If the pointer of the pressure gauge 7 does not change, it means that the pressure vessel 1 has good airtightness and the test can begin.

[0056] b) Disconnect gas cylinder 11, open valve 9 on gas pipe 16 to release gas from pressure vessel 1, ensure that the pressure inside pressure vessel 1 is zero, open the lid 4 of pressure vessel 1, clean the salt wall lining 2 cavity inside pressure vessel 1 with brine, set the temperature of the temperature control device to the temperature required for the test, and heat pressure vessel 1 through heating belt 3 to make pressure vessel 1 reach a constant temperature.

[0057] c) Fill the pressure vessel 1 with storage medium, such as natural gas and brine (the ratio of natural gas and brine depends on the test conditions), close the lid 4 of the pressure vessel 1, close the sampling valves in the three sampling units, open the valve 9 on the gas pipe 16 to connect to the gas cylinder 11, pressurize to the required test pressure, and close the valve 9.

[0058] d) Sampling is carried out at different storage times according to the test requirements. During sampling, the sampling valves are controlled and the corresponding sampling valves of the upper, middle and lower layers are opened in sequence. The sampling tube 17 is connected to the peristaltic pump 13 for quantitative sampling. Gas is taken from each sampling point using a gas cylinder or sampling bag. The sampled substances are subjected to corresponding physical property tests such as gas composition, water dew point, and calorific value (the measured physical properties are determined according to the storage medium requirements).

[0059] e) Close the sampling valve after sampling is completed until the test is finished.

[0060] Example 1

[0061] See Figure 1 The present invention provides a salt cavern storage simulation test device, and embodiment 1 provides an experiment on the physical property changes of crude oil stored in salt caverns. Crude oil and brine in appropriate proportions are stored in a pressure vessel 1. Nitrogen gas is introduced into the valve 9 on the gas pipe 16 to ensure that the pressure vessel 1 reaches the pressure required for the test. Samples are taken from the upper, middle, and lower layers of the oil at one week, three weeks, one month, and two months of storage. The temperature inside the pressure vessel 1 is reduced to a suitable temperature, and the pressure inside the pressure vessel 1 is reduced to zero. The obtained oil samples are then subjected to physical property analysis tests, such as density, pour point, viscosity, acid value, and salt content.

[0062] Example 2

[0063] See Figure 1 The present invention provides a salt cavern storage simulation test device, and embodiment 2 provides a test on the physical property change law of diesel (not limited to diesel, such as gasoline, aviation kerosene, etc.) stored in salt caverns. A suitable ratio of diesel and brine is stored in a pressure vessel 1. Nitrogen gas is introduced into valve 9 on gas pipe 16 to ensure that pressure vessel 1 reaches the pressure required for the test. Samples are taken from the upper, middle, and lower layers of the oil at one week, two weeks, three weeks, and one month of storage. The temperature inside pressure vessel 1 is lowered to room temperature, and after standing for 60 minutes, the pressure inside pressure vessel 1 is reduced to zero. The obtained oil samples are then subjected to physical property analysis tests, such as cetane number, oxidation resistance, density, and acid value.

[0064] Example 3

[0065] See Figure 1The present invention provides a salt cavern storage simulation test device, and embodiment 1 provides an experiment on the physical property changes of crude oil and natural gas stored in salt caverns. Crude oil and brine of suitable proportions are stored in a pressure vessel 1. Natural gas is introduced into the valve 9 on the gas pipe 16 to ensure that the pressure vessel 1 reaches the pressure required for the test. Samples of the upper, middle, and lower layers of oil and natural gas are taken at one week, three weeks, one month, and two months of storage. Before sampling, the temperature is first lowered to a suitable level, and a sampling bag is connected to the gas outlet to obtain a natural gas sample. The natural gas composition is analyzed. Then, the pressure inside the pressure vessel 1 is reduced to zero, and the obtained oil sample is subjected to physical property analysis tests, such as crude oil composition, density, pour point, viscosity, acid value, and salt content.

[0066] In summary, the salt cavern storage simulation test device and test method of the present invention can simulate the long-term storage property changes of the storage medium in the salt cavern under high temperature and high pressure environment, and make targeted treatment measures for the changes in the properties of the storage medium.

[0067] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A salt cavern storage simulation test device, characterized in that: The device includes a pressure vessel with an internal salt wall liner containing a storage medium. The outer wall of the pressure vessel is equipped with a heating device. The pressure vessel is also connected to a sampling device and a pressure system for simulating the high-pressure environment of a salt cavern storage facility.

2. The salt cavern storage simulation test device as described in claim 1, characterized in that: The sampling device includes a sampling telescopic sleeve and several sampling units connected to the sampling telescopic sleeve.

3. The salt cavern storage simulation test device as described in claim 2, characterized in that: The sampling telescopic sleeve includes a first sleeve, a second sleeve is fitted on the outer wall of the first sleeve, a first connecting pipe is connected to the second sleeve, a third sleeve is fitted on the outer wall of the second sleeve, an outer shell is fitted on the outer wall of the third sleeve, and the third sleeve is also connected to the second connecting pipe. The first connecting pipe and the second connecting pipe penetrate the outer shell.

4. A salt cavern storage simulation test device as described in claim 2 or 3, characterized in that: Each of the sampling units includes a sampling tube connected to a sampling telescopic sleeve, with a sampling bottle connected to the end of the sampling tube away from the sampling telescopic sleeve, and a flow meter and a peristaltic pump also installed on the sampling tube.

5. The salt cavern storage simulation test device as described in claim 1, characterized in that: The heating device includes a heating belt sleeved on the outer wall of the pressure vessel, and the heating belt is connected to a temperature control device.

6. The salt cavern storage simulation test device as described in claim 5, characterized in that: The temperature control device includes a thermocouple, one end of which is located inside the salt wall lining, and the other end is connected to a temperature control box, which is connected to a heating belt.

7. The salt cavern storage simulation test device as described in claim 1, characterized in that: The pressure system includes a gas pipe, one end of which is connected to a gas cylinder, and the other end of which is located inside the salt wall lining.

8. The salt cavern storage simulation test device as described in claim 7, characterized in that: A valve is installed on the trachea.

9. The salt cavern storage simulation test device as described in claim 1, characterized in that: The pressure vessel is equipped with a pressure gauge and a pressure relief valve.

10. A method for simulating salt cavern storage tests, implemented based on the salt cavern storage simulation test apparatus according to any one of claims 1-9, characterized in that, Includes the following steps: Heating pressure vessel; After the pressure vessel is heated, it is filled with storage medium and then pressurized. After pressurization is completed, sampling is performed; The physical properties of the sampled substances are tested.

11. The method for simulating salt cavern storage as described in claim 10, characterized in that: The pressure vessel needs to be pretreated before heating.

12. The method for simulating salt cavern storage as described in claim 11, characterized in that: The pretreatment includes airtightness testing of the simulated test device, venting of the pressure vessel, and cleaning of the salt wall lining.

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