Device and method for experimental detection of dynamic characteristics of sediments containing natural gas hydrates

Abstract

The present invention discloses an experimental detection device and method for the dynamic characteristics of sediments containing natural gas hydrates. The device includes: a base, a sealing cylinder, a sealing rubber sleeve, a resonance component, a support frame, a boost component and a temperature adjustment component. The sealing cylinder is arranged on the base and forms a sealed space with the base. The sealing rubber sleeve is arranged on the base in the sealed space and forms an annular space with the inner wall of the sealing cylinder, and a sediment sample containing natural gas hydrates is sealed in the sealing rubber sleeve. The resonance component is arranged on the support frame, and the end thereof passes through the sealing cylinder and abuts against the sealing rubber sleeve, so as to excite the sealing rubber sleeve and resonate with the sediment sample in the sealing rubber sleeve. The boost component is used to increase the pressure in the annular space. The temperature adjustment component is used to adjust the temperature in the sealing rubber sleeve. The present invention can obtain the experimental parameters required for calculating the dynamic characteristics of the sediment sample to ensure that the required dynamic characteristics of the sediment can be obtained quickly and accurately.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas exploration, and in particular to a device and method for experimentally detecting dynamic characteristics of sediments containing natural gas hydrates. Background Art

[0002] Natural gas hydrate is an ice-like solid substance formed by natural gas such as methane and water under low temperature and high pressure conditions. The marine continental slope is an important area for the formation, distribution and development of natural gas hydrates in the sea area, and it is also an important area for human operations such as conventional oil and gas exploration and development. The exploitation of natural gas hydrates and human drilling and other operations will cause the decomposition of natural gas hydrates in the sediments, which will cause the mechanical properties of the strata containing natural gas hydrates to change, which may lead to disasters such as submarine landslides and drilling platform collapses. In addition, earthquake activities will further aggravate these risks and disasters in the operating area. Therefore, when developing natural gas hydrates in the sea area and operating in the area where natural gas hydrates are distributed in the sea area, accurately grasping the dynamic characteristics of sediments containing natural gas hydrates, such as the elastic modulus, shear modulus and damping ratio of sediments containing natural gas hydrates, can better guide the development of natural gas hydrates and related operations in the area where natural gas hydrates are distributed in the sea area, and reduce the possibility of risks such as submarine landslides and drilling platform collapses caused by natural gas hydrates. The existing technology currently does not have equipment for experimental detection of the above dynamic characteristics. Summary of the invention

[0003] The embodiment of the present invention provides a device for experimental detection of dynamic characteristics of sediments containing natural gas hydrates, which is used to obtain experimental parameters required for calculating the dynamic characteristics of sediment samples, so as to ensure that the required dynamic characteristics of sediments can be obtained quickly and accurately. The device includes:

[0004] Base, sealing cylinder, sealing rubber sleeve, resonance component, support frame, booster component, temperature regulating component;

[0005] The sealing cylinder is arranged on the base, and forms a sealing space with the base;

[0006] The sealing rubber sleeve is arranged on the base in the sealing space and forms an annular space with the inner wall of the sealing cylinder. The sealing rubber sleeve is sealed with a sediment sample containing natural gas hydrate;

[0007] The resonance component is arranged on the support frame, and the end thereof passes through the sealing tube and abuts against the sealing rubber sleeve, so as to excite the sealing rubber sleeve, resonate with the sediment sample in the sealing rubber sleeve, and generate resonance data, wherein the resonance data includes: the resonance frequency, the amplitude voltage value corresponding to each resonance frequency, and a vibration attenuation curve for reflecting the vibration amplitude changing with time after power is cut off;

[0008] The booster assembly is used to increase the pressure in the annular space;

[0009] The temperature regulating component is used to adjust the temperature inside the sealing rubber sleeve.

[0010] The embodiment of the present invention also provides a method for performing a dynamic characteristic experimental detection using a sediment dynamic characteristic experimental detection device containing natural gas hydrates, so as to obtain experimental parameters required for calculating the dynamic characteristics of sediment samples, so as to ensure that the required sediment dynamic characteristics can be obtained quickly and accurately. The method comprises:

[0011] Using a pressure-boosting component to increase the pressure in the annular space, and using a temperature-adjusting component to adjust the temperature in the sealing rubber sleeve to simulate the actual environment of the sediment sample;

[0012] The sealing rubber sleeve is excited by a resonance component to generate resonance with the sediment sample containing natural gas hydrate in the sealing rubber sleeve;

[0013] Resonance data is collected and the dynamic characteristic parameters of the sediment sample are calculated using the resonance data. The resonance data includes: resonance frequency, amplitude voltage value corresponding to each resonance frequency, and a vibration attenuation curve for reflecting the vibration amplitude that changes with time after power is cut off.

[0014] In the embodiment of the present invention, a base, a sealing cylinder, a sealing rubber sleeve, a support frame, a boosting assembly and a temperature regulating assembly are provided, and the sealing cylinder is provided on the base to form a sealed space with the base, the sealing rubber sleeve is provided on the base in the sealed space, and an annular space is formed with the inner wall of the sealing cylinder, a sediment sample containing natural gas hydrate is sealed in the sealing rubber sleeve, the boosting assembly is used to increase the pressure in the annular space, and the temperature in the sealing rubber sleeve is adjusted by the temperature regulating assembly, so as to achieve the simulation of the real environment in which the sediment sample containing natural gas hydrate reacts, and ensure the accuracy of subsequent experiments. By providing a resonance assembly, and setting the resonance assembly on the support frame, and the end of the resonance assembly passes through the sealing cylinder and abuts against the sealing rubber sleeve, the sealing rubber sleeve is excited to resonate with the sediment sample in the sealing rubber sleeve, and the experimental parameters required for calculating the dynamic characteristics of the sediment sample can be obtained, so as to ensure that the required sediment dynamic characteristics can be obtained quickly and accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0016] Figure 1 It is a schematic diagram of the structure of the experimental detection device for the dynamic characteristics of sediments containing natural gas hydrates in an embodiment of the present invention.

[0017] The reference numerals are as follows:

[0018] 1 base,

[0019] 2 Sealing cylinder,

[0020] 201 cylinder,

[0021] 202 end cap,

[0022] 3 Sealing rubber sleeve,

[0023] 4 Resonance components,

[0024] 401 Exciter,

[0025] 402 piston,

[0026] 403 Load Sensor,

[0027] 404 fixed rod,

[0028] 5 support frame,

[0029] 501 First crossbar,

[0030] 502 Second crossbar,

[0031] 503 vertical pole,

[0032] 6 Temperature and pressure detectors,

[0033] 7 Gas injection pipeline,

[0034] 8. Exhaust pipe,

[0035] 9 The first injection pipeline,

[0036] 10 The first liquid outlet pipe,

[0037] 11. Booster equipment,

[0038] 12 Pressure control valve,

[0039] 13 Second injection pipeline,

[0040] 14 The second liquid outlet pipe,

[0041] 15 Refrigeration equipment,

[0042] 16 bolts,

[0043] X Sediment samples. DETAILED DESCRIPTION

[0044] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0045] The embodiment of the present invention provides a device for testing the dynamic characteristics of sediments containing natural gas hydrates. Figure 1 As shown, the device includes: a base 1, a sealing cylinder 2, a sealing rubber sleeve 3, a resonance component 4, a support frame 5, a boost component and a temperature adjustment component. Among them, the sealing cylinder 2 is arranged on the base 1, and forms a sealed space with the base 1. The sealing rubber sleeve 3 is arranged on the base 1 in the sealed space, and forms an annular space with the inner wall of the sealing cylinder 2, and a sediment sample X containing natural gas hydrate is sealed in the sealing rubber sleeve 3. The resonance component 4 is arranged on the support frame 5, and the end thereof passes through the sealing cylinder 2 and abuts against the sealing rubber sleeve 3, and is used to excite the sealing rubber sleeve 3, resonate with the sediment sample X in the sealing rubber sleeve 3, and generate resonance data, and the resonance data includes: the resonance frequency, the amplitude voltage value corresponding to each resonance frequency, and the vibration attenuation curve used to reflect the vibration amplitude that changes with time after the power is cut off. The boost component is used to increase the pressure in the annular space. The temperature adjustment component is used to adjust the temperature in the sealing rubber sleeve 3.

[0046] When it is necessary to conduct an experimental test on the dynamic characteristics of sediments containing natural gas hydrates, according to the experimental requirements, the pressure is increased in the annular space by using the boosting component, and the temperature in the sealing rubber sleeve 3 is adjusted by using the temperature regulating component, so that the confining pressure of the sediment sample X containing natural gas hydrates and the temperature of the sediment sample X reach the values ​​required by the experiment (that is, the sediment sample X is placed under low temperature and high pressure to simulate the actual formation environment of natural gas hydrates). Subsequently, the sealing rubber sleeve 3 is excited by the resonance component 4, and resonance occurs with the sediment sample X containing natural gas hydrates in the sealing rubber sleeve 3. In this process, resonance data is collected, and the resonance data is used to calculate the dynamic characteristic parameters of the sediment sample X, such as the elastic modulus, shear modulus and damping ratio of the sediment sample X. Among them, the resonance data includes: the resonance frequency, the amplitude voltage value corresponding to each resonance frequency, and the vibration attenuation curve used to reflect the vibration amplitude that changes with time after the power is cut off.

[0047] Regarding the specific example of obtaining the elastic modulus, shear modulus and damping ratio of sediment sample X, the principle is to apply longitudinal vibration to sediment sample X under certain conditions, and gradually change the driving frequency, measure the resonance frequency of sediment sample X, and then cut off the power, record the vibration attenuation curve, and then calculate the dynamic elastic modulus E or dynamic shear modulus G of the sample based on the resonance frequency and the geometric dimensions and end constraints of the sample, and calculate the damping ratio λ based on the attenuation curve. The details are as follows:

[0048] The calculation formula of dynamic shear modulus G is G = ρ(2πfh / β) 2 , where G is the dynamic shear modulus of the sediment sample X, ρ is the mass density of the sediment sample X, f is the torsional vibration resonance frequency, h is the height of the sediment sample X, and β is the eigenvalue of the torsional vibration frequency equation.

[0049] Damping ratio λ calculation formula, Where A N is the amplitude of the Nth vibration, A N+m is the amplitude of the N+mth time.

[0050] The experimental detection device for the dynamic characteristics of sediment containing natural gas hydrate provided by the embodiment of the present invention is provided with a base 1, a sealing cylinder 2, a sealing rubber sleeve 3, a support frame 5, a boosting component and a temperature adjustment component, and the sealing cylinder 2 is provided on the base 1 to form a sealed space with the base 1, the sealing rubber sleeve 3 is provided on the base 1 in the sealed space, and forms an annular space with the inner wall of the sealing cylinder 2, the sealing rubber sleeve 3 is sealed with a sediment sample X containing natural gas hydrate, the boosting component is used to increase the pressure in the annular space, and the temperature in the sealing rubber sleeve 3 is adjusted by the temperature adjustment component, so as to achieve the simulation of the real environment in which the sediment sample X containing natural gas hydrate reacts, and ensure the accuracy of subsequent experiments. By providing a resonance component 4, and setting the resonance component 4 on the support frame 5, and the end of the resonance component 4 passes through the sealing cylinder 2 and abuts against the sealing rubber sleeve 3, the sealing rubber sleeve 3 is excited, and resonates with the sediment sample X in the sealing rubber sleeve 3, the experimental parameters required for calculating the dynamic characteristics of the sediment sample X can be obtained, so as to ensure that the required sediment dynamic characteristics can be obtained quickly and accurately.

[0051] Among them, Figure 1 As shown, the sealing cylinder 2 comprises: a cylinder 201 and an end cover 202. The cylinder 201 is arranged on the base 1. The end cover 202 is arranged on the cylinder 201 and is used to seal the cylinder 201.

[0052] Furthermore, in order to ensure the sealing between the sealing cylinder 2 and the base 1 , a sealing ring may be provided at the connection between the cylinder body 201 and the base 1 .

[0053] In addition, in order to ensure that the cylinder 201 and the end cover 202 are firmly connected and easy to disassemble, the cylinder 201 and the end cover 202 can be set to be detachably connected. Specifically, for example, the two can be connected by bolts 16, see Figure 1 In order to improve the sealing between the cylinder 201 and the end cover 202, sealing rings can be installed at the two joints through the bolts 16. In addition, in order to facilitate the discharge of the gas in the sealing cylinder 2 to the outside, an exhaust pipe is also provided on the end cover 202.

[0054] like Figure 1 As shown, the support frame 5 includes: a first crossbar 501, a second crossbar 502 and a plurality of vertical bars 503. The plurality of vertical bars 503 are arranged on the base 1. The first crossbar 501 and the second crossbar 502 are arranged on the plurality of vertical bars 503, and the first crossbar 501 is located above the second crossbar 502, the sealing cylinder 2 is located between the base 1 and the second crossbar 502, and the resonance assembly 4 is located between the first crossbar 501 and the second crossbar 502.

[0055] By such arrangement, support for the resonance component 4 is achieved. In addition, the axis of the sediment sample X can be made to correspond to the axis of the resonance component 4 to ensure the subsequent resonance effect, thereby improving the accuracy of the acquired resonance parameters.

[0056] In order to ensure that the resonance component 4 can resonate smoothly with the sediment sample X, the resonance parameters are obtained, such as Figure 1 As shown, the resonance assembly 4 includes: an exciter 401, a piston 402, a load sensor 403 and a fixing rod 404. The exciter 401 and the load sensor 403 are arranged on the piston 402. One end of the piston 402 passes through the end cover 202 and abuts against the sealing rubber sleeve 3. The fixing rod 404 is arranged on the support frame 5 and is used to fix the exciter 401.

[0057] When used, the exciter 401 is used to generate vibration on the piston 402, and the excitation wave is transmitted to the sediment sample X in the sealing rubber sleeve 3 through the piston 402. The excitation frequency is gradually increased from low to high until the sediment sample X resonates, and the resonance frequency and the maximum voltage value are recorded. The maximum voltage value is used to calculate the dynamic strain or dynamic shear strain. Subsequently, the excitation frequency continues to increase, and the amplitude decreases. The amplitude voltage value corresponding to each excitation frequency is recorded, and the damping ratio is calculated. Repeat the test process and record multiple sets of data. In this process, the load sensor 403 is used to record the load.

[0058] In order to obtain the temperature and pressure data of sediment sample X in real time during the experiment, Figure 1 As shown, the device further comprises: a temperature and pressure detector 6. The temperature and pressure detector 6 is arranged on the sealing cylinder 2 and is used to collect temperature data and pressure data of the sediment sample X.

[0059] In order to facilitate the filling of the test gas into the sealing rubber sleeve 3 to meet the experimental needs, such as Figure 1 As shown, the device further includes: an air injection pipeline 7 and an air outlet pipeline 8. The air injection pipeline 7 is connected to the sealing rubber sleeve 3 and is used to inject the experimental gas into the sealing rubber sleeve 3. One end of the air outlet pipeline 8 is connected to the sealing rubber sleeve 3, and the other end passes through the end cover 202 and is connected to the outside.

[0060] The experimental gas may be methane, carbon dioxide, etc.

[0061] In order to ensure that the pressure in the annular space between the sealing cylinder 2 and the sealing rubber sleeve 3 meets the experimental requirements, Figure 1 As shown, the device further comprises: a first injection pipe 9 and a first outlet pipe 10. One end of the first injection pipe 9 is connected to the hydraulic pump, and the other end is connected to the annular space. One end of the first outlet pipe 10 is connected to the annular space, and the other end is connected to the outside.

[0062] Furthermore, in order to control the confining pressure of the sediment sample X in real time and make it greater than the internal pressure of the sediment sample X by about 0.5 MPa, as Figure 1 As shown, the boosting assembly includes: a boosting device 11 and a pressure control valve 12 arranged on the first injection pipeline 9 , and the pressure control valve 12 is located downstream of the boosting device 11 .

[0063] In order to reduce the temperature of the sediment sample X as needed during the experiment and meet the experimental requirements, such as Figure 1 As shown, the temperature adjustment component includes: a second liquid injection pipe 13, a second liquid outlet pipe 14 and a refrigeration device 15. One end of the second liquid injection pipe 13 is connected to the refrigeration device 15, and the other end passes through the base 1 and communicates with the sealing rubber sleeve 3. One end of the second liquid outlet pipe 14 is communicated with the sealing rubber sleeve 3, and the other end is communicated with the outside.

[0064] Among them, the gas injection pipeline 7, the gas outlet pipeline 8, the first liquid injection pipeline 9, the first liquid outlet pipeline 10, the second liquid injection pipeline 13, and the second liquid outlet pipeline 14 can all pass through the base 1 and enter the sealing tube 2 to save space.

[0065] The present invention is described below with a specific embodiment:

[0066] Sediment sample X filling stage: According to the experimental requirements, the unsaturated sample preparation method or the saturated sample gas diffusion sample preparation method can be used to prepare the sediment sample X. The prepared sediment sample X is covered with a sealing rubber sleeve 3 and installed on the base 1, and the gas injection pipeline 7 is connected. At the same time, the second liquid injection pipeline 13, the second liquid outlet pipeline 14 and the refrigeration equipment 15 are connected. The sealing cylinder 2 is installed in the card slot of the base 1. The card slot has an O-ring to ensure airtightness. The card slot of the end cover 202 and the cylinder 201 are buckled. The card slot of the end cover 202 has an O-ring. At the same time, the card slot of the end cover 202 and the cylinder 201 are fixed firmly with bolts 16 to further ensure the airtightness inside the sealing cylinder 2. Subsequently, the gas injection pipeline 7, the sediment sample X and the gas outlet pipeline 8 on the sediment sample X are flushed with experimental gas to remove the internal air, and the airtightness of the sample is checked. The sealing performance of the sealing tube 2 is checked in conjunction with the first liquid injection pipeline 9, the first liquid outlet pipeline 10, the booster device 11, the air outlet pipeline 8, etc.

[0067] Natural gas hydrate formation stage: After the sediment sample X is loaded and various inspections are completed, the valve on the first liquid outlet pipe 10 is closed, the valve of the exhaust pipe on the end cover 202 is opened, and hydraulic fluid is injected into the annular space formed by the sealing cylinder 2 and the sealing rubber sleeve 3 through the first liquid injection pipe 9. After filling, the valve of the exhaust pipe is closed, and the booster device 11 and the pressure control valve 12 control the confining pressure to make it greater than the internal pressure of the sediment sample X by about 0.5MPa, and the experimental gas is injected into the sediment sample X through the gas injection pipe 7 to the pressure required for the experiment. In this process, the confining pressure is adjusted in real time to maintain a suitable pressure difference. The temperature of the sediment sample X is adjusted to the temperature required for the experiment through the second liquid injection pipe 13, the second liquid outlet pipe 14 and the refrigeration equipment 15; during the formation of natural gas hydrates, the temperature and pressure detector 6 collects the temperature and pressure values ​​of the sediment sample X in real time until the reaction is completed.

[0068] Dynamic characteristic parameter testing phase: After the natural gas hydrate reaction in sediment sample X is completed, the confining pressure is adjusted by the booster device 11 and the pressure control valve 12 according to the experimental requirements, the exciter 401 performs steady-state forced excitation, and the load sensor 403 is used to record the load. The action is transmitted to the sediment sample X through the piston 402, and the excitation frequency is gradually increased from low to high until the system resonates. The resonant frequency and the maximum voltage value are recorded. The maximum voltage value is used to calculate the dynamic strain or dynamic shear strain. After reaching resonance, the power supply of the exciter 401 is cut off, and the sediment sample X undergoes free decay vibration. The vibration amplitude and time relationship curve of the free decay motion of the sediment sample X are recorded, and the damping ratio is calculated. Repeat the test process and record multiple sets of data.

[0069] After all tests are completed, the load and confining pressure are removed, the hydraulic fluid is discharged, the bolts 16 are unscrewed, the end cover 202 is opened, the sediment sample X is taken out, and the equipment is cleaned, maintained and maintained.

[0070] The present invention also provides a method for performing a dynamic characteristic experimental detection using a dynamic characteristic experimental detection device for sediments containing natural gas hydrates, the method comprising:

[0071] Using a pressure-boosting component to increase the pressure in the annular space, and using a temperature-adjusting component to adjust the temperature in the sealing rubber sleeve 3, so as to simulate the actual environment of the sediment sample X;

[0072] The sealing rubber sleeve 3 is excited by the resonance component 4 to resonate with the sediment sample X containing natural gas hydrate in the sealing rubber sleeve 3;

[0073] Resonance data is collected and used to calculate dynamic characteristic parameters of the sediment sample X. The resonance data includes: resonance frequency, amplitude voltage value corresponding to each resonance frequency, and a vibration attenuation curve for reflecting the vibration amplitude changing with time after power is cut off.

[0074] By using the above method, the present invention can obtain the experimental parameters required for calculating the dynamic characteristics of the sediment sample X, so as to ensure that the required sediment dynamic characteristics can be obtained quickly and accurately.

[0075] In summary, the present invention combines the resonant column test principle and triaxial compression shear test principle in geotechnical mechanics with the low-temperature and high-pressure formation principle of natural gas hydrate, realizing the unification of in-situ formation of natural gas hydrate and dynamic parameter characteristic test. In addition, since the experiment is within a small strain range, the sample is almost not damaged, and the same sample has the advantage of repeatability, which saves costs.

[0076] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An experimental detection device for dynamic characteristics of sediments containing natural gas hydrates, characterized in that: include: A base (1), a sealing cylinder (2), a sealing rubber sleeve (3), a resonance component (4), a support frame (5), a pressurizing component, and a temperature regulating component; The sealing cylinder (2) is arranged on the base (1) and forms a sealed space with the base (1); The sealing rubber sleeve (3) is arranged on the base (1) in the sealed space and forms an annular space with the inner wall of the sealing cylinder (2); a sediment sample (X) containing natural gas hydrate is sealed in the sealing rubber sleeve (3); The resonance component (4) is arranged on the support frame (5), and the end portion thereof passes through the sealing tube (2) and abuts against the sealing rubber sleeve (3), and is used to excite the sealing rubber sleeve (3), resonate with the sediment sample (X) in the sealing rubber sleeve (3), and generate resonance data, wherein the resonance data includes: a resonance frequency, an amplitude voltage value corresponding to each resonance frequency, and a vibration attenuation curve for reflecting the vibration amplitude that changes with time after power is cut off; The booster assembly is used to increase the pressure in the annular space; The temperature regulating component is used to adjust the temperature inside the sealing rubber sleeve (3); The sealing cylinder (2) comprises: a cylinder body (201) and an end cover (202); The cylinder (201) is arranged on the base (1); The end cover (202) is arranged on the cylinder (201) and is used to seal the cylinder (201); The resonance assembly (4) comprises: an exciter (401), a piston (402), a load sensor (403) and a fixing rod (404); The vibration exciter (401) and the load sensor (403) are arranged on the piston (402); One end of the piston (402) passes through the end cover (202) and abuts against the sealing rubber sleeve (3); The fixing rod (404) is arranged on the supporting frame (5) and is used to fix the vibration exciter (401); It also includes: a gas injection pipeline (7) and a gas outlet pipeline (8); The gas injection pipeline (7) is in communication with the sealing rubber sleeve (3) and is used for injecting experimental gas into the sealing rubber sleeve (3); One end of the air outlet pipe (8) is in communication with the sealing rubber sleeve (3), and the other end passes through the end cover (202) and is in communication with the outside.

2. The device according to claim 1, characterized in that Also includes: A temperature and pressure detector (6) is arranged on the sealing cylinder (2) and is used to collect temperature data and pressure data of the sediment sample (X).

3. The device according to claim 1, characterized in that Also includes: A first liquid injection pipeline (9) and a first liquid outlet pipeline (10); One end of the first injection pipe (9) is connected to the hydraulic pump, and the other end is communicated with the annular space; One end of the first liquid outlet pipe (10) is in communication with the annular space, and the other end is in communication with the outside.

4. The device according to claim 3, characterized in that The boosting assembly comprises: a boosting device (11) and a pressure control valve (12) arranged on the first injection pipeline (9), wherein the pressure control valve (12) is located downstream of the boosting device (11).

5. The device according to claim 1, characterized in that The temperature adjustment component comprises: a second liquid injection pipeline (13), a second liquid outlet pipeline (14) and a refrigeration device (15); One end of the second liquid injection pipe (13) is connected to the refrigeration device (15), and the other end passes through the base (1) and is connected to the sealing rubber sleeve (3); One end of the second liquid outlet pipe (14) is in communication with the sealing rubber sleeve (3), and the other end is in communication with the outside.

6. The device according to claim 1, characterized in that The support frame (5) comprises: a first crossbar (501), a second crossbar (502) and a plurality of vertical bars (503); A plurality of vertical rods (503) are arranged on the base (1); The first cross bar (501) and the second cross bar (502) are arranged on the plurality of vertical bars (503), and the first cross bar (501) is located above the second cross bar (502), the sealing cylinder (2) is located between the base (1) and the second cross bar (502), and the resonance component (4) is located between the first cross bar (501) and the second cross bar (502).

7. A method for conducting a dynamic characteristics experimental detection of a sediment containing natural gas hydrate using the dynamic characteristics experimental detection device of any one of claims 1 to 6, characterized in that: The method comprises: Using a pressure increasing component to increase the pressure in the annular space, and using a temperature regulating component to adjust the temperature in the sealing rubber sleeve (3) to simulate the actual environment of the sediment sample (X); The sealing rubber sleeve (3) is excited by a resonance component (4) to generate resonance with the sediment sample (X) containing natural gas hydrate in the sealing rubber sleeve (3); Resonance data is collected and the dynamic characteristic parameters of the sediment sample (X) are calculated using the resonance data. The resonance data includes: resonance frequency, amplitude voltage value corresponding to each resonance frequency, and a vibration attenuation curve for reflecting the vibration amplitude changing with time after power is cut off.

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