Tool and method for measuring gas and hydrogen storage form of butt-joint brine mining old cavity salt cavern

Abstract

The invention provides a tool and a method for measuring the gas and hydrogen storage form of a butt-joint brine mining old-cavity salt cavern, and belongs to the technical field of salt cavern surveying and mapping, and the tool comprises a ground control system which comprises a ground adapter and a ground console; the underground salt cavern form detection system comprises a motor power system, an auxiliary detection telescopic system and a sonar detector; wherein the ground control system is connected with the underground salt cavern form detection system through a cable, and controls the underground salt cavern form detection system to detect the salt cavern form. According to the invention, the salt cavern detection range can be expanded.

Description

Technical Field

[0001] The invention relates to a tool and method for measuring the gas and hydrogen storage morphology of a salt cavern connected to a salt mining old cavern, belonging to the technical field of salt cavern surveying and mapping. Background Art

[0002] Salt cavern gas storage is a method of water-soluble mining in underground salt layers or salt domes. It controls the dissolution of rock salt by injecting water to form underground caverns and store oil and gas. Because the speed of water injection into the cavity is slow, and there are many old cavities formed after the brine is mined in brine mines in my country, the rational use of old cavities will save cavity building time and investment expenditure. Many of the first batch of salt cavern gas storages in my country were formed after the reconstruction of old cavities. However, the old cavities generally have complex and irregular morphology, which requires sonar cavity measurement, that is, sonar is needed to measure the cavity shape and volume.

[0003] Sonar measurement technology uses the method of calculating the time difference between the received pulse echo and the transmitted pulse signal to measure the detection distance. Under the premise of knowing the speed of sound waves in the environment, it is only necessary to measure the round-trip time of the sound pulse signal to obtain the detection distance. For old cavities with single-well and single-cavity brine mining, the sonar is dragged vertically up and down in the salt cavity by a cable during cavity measurement to detect the cavity shape. However, in order to increase the brine mining speed, domestic brine mining companies mostly use horizontal docking wells to mine brine. This method of mining forms a horizontal cavity of tens or even hundreds of meters. Figure 1 As shown, the horizontal cavity cannot be measured by conventional cavity measurement methods, and it is connected to the old cavity for brine mining. There are a lot of cavity residues and silt accumulated after the collapse of mudstone interlayers in the horizontal cavity. The shape is complex and the distribution is extremely irregular, making cavity measurement difficult.

[0004] Therefore, developing a salt cavern morphology detection system that can be connected to the old salt caverns for brine mining is an urgent issue. Summary of the invention

[0005] In view of the above-mentioned technical problems existing in the prior art, the present invention proposes a tool and method for measuring the gas and hydrogen storage morphology of salt caverns connected to the old caverns for brine mining, which can achieve the expansion of the detection range of salt caverns.

[0006] The present invention proposes a system for reconstructing an underground gas storage reservoir by connecting an old cavity of a brine mine, comprising:

[0007] a ground control system including a ground adapter and a ground control console; and

[0008] An underground salt cavern morphology detection system, which includes an electric motor power system, an auxiliary detection telescopic system, and a sonar detector;

[0009] Wherein, the ground control system is connected to the underground salt cavern morphology detection system through a cable, and controls the underground rock cavern morphology detection system to detect the salt cavern morphology.

[0010] A further improvement of the present invention is that the motor power system includes a motor, a transmission shaft and a rotating shaft connected to the auxiliary detection and telescopic system are provided at the front end of the motor, and a cable connector connected to the cable is provided at the rear end of the motor.

[0011] A further improvement of the present invention is that the ground control console includes a computer terminal, the computer terminal is installed with a plurality of program modules, and is connected to the ground adapter via a USB interface.

[0012] A further improvement of the present invention is that the program module includes a sensor signal acquisition and transmission processing module, a sonar signal acquisition and transmission module, a sonar signal data processing module and a motor control module.

[0013] A further improvement of the present invention is that the auxiliary detection telescopic system comprises a telescopic tube composed of a plurality of concentric sleeves, the innermost layer of the concentric sleeves is a central tube, and the sonar detector is connected to the central tube.

[0014] A further improvement of the present invention is that the sonar detector comprises an ultrasonic sensor probe and a camera device arranged at the front end, and the ultrasonic sensor probe is provided with sonar probes of different frequencies.

[0015] A further improvement of the present invention is that a rotation system is provided at the rear end of the ultrasonic probe sensor to drive the ultrasonic sensor probe to rotate, thereby performing a 360-degree uniform rotation scan on the horizontal and vertical sections of the salt cavern to obtain the cavity morphology.

[0016] A further improvement of the present invention is that a propeller that can be extended or retracted is also provided in the rotating system to keep the movement of the detector stable during the horizontal section measurement process.

[0017] A further improvement of the present invention is that a pressure balance system and an electronic compass are provided at the rear end of the propeller.

[0018] A further improvement of the present invention is that a sound velocity calibration device is provided at the rear end of the pressure balance system and the electronic compass.

[0019] A further improvement of the present invention is that a stabilizing gyroscope is provided at the rear end of the sound velocity calibration device, and the rear end of the stabilizing gyroscope is connected to the auxiliary detection telescopic system through a connecting device.

[0020] According to another aspect of the present invention, a measurement method is also proposed, using the above-mentioned docking mining old cavity salt cavern gas and hydrogen storage morphology measurement tool to measure the salt cavern morphology, the method comprising:

[0021] Assemble the salt cavern morphology detection tool for docking with the old cavern for brine mining, and after assembly, put the salt cavern morphology detection system into the well. Starting from the first salt cavern wellbore being put into the well, the ground begins to receive downhole signals in real time;

[0022] When the salt cavern morphology detection system enters the salt cavern, the brine sound velocity is calibrated first, the measurement angle step is set on the ground, the sound wave frequency of the ultrasonic sensor probe is selected, and the sonar measurement is started. Each measurement point is rotated 360 degrees in the vertical direction.

[0023] Driven by the motor power system, the auxiliary detection telescopic system and the sonar detector rotate 90 degrees to detect the horizontal cavity; the auxiliary detection telescopic system gradually extends, and each measuring point in the horizontal direction of the salt cavern rotates 360 degrees for measurement;

[0024] Afterwards, the auxiliary detection telescopic system and the sonar detector are retracted section by section, and driven by the motor power system, they are rotated 90 degrees back to a vertical state, and the salt cavern morphology detection system is lifted out of the wellbore to the ground.

[0025] Then enter the well through the second salt cavern wellbore and repeat the above operation;

[0026] Finally, the cavity measurement data of the first salt cavern wellbore and the second salt cavern wellbore were integrated and interpreted to obtain a complete morphological characterization of the salt cavern cavity.

[0027] Compared with the prior art, the advantages of the present invention are:

[0028] The present invention discloses a tool and method for measuring the gas and hydrogen storage morphology of salt caverns connected to old brine mining caverns, which can achieve the expansion of the detection range of salt caverns. Compared with the prior art, the detector for the morphology of salt caverns connected to old brine mining caverns of the present invention is more flexible and has a larger detection range, especially for the detection of horizontal cavities, which solves the limitations of traditional sonar measurement technology in terms of detection range.

[0029] The present invention's tool for measuring gas and hydrogen storage morphology in salt caverns for docking with old brine mining cavities solves the problem of the limitations of the medium that can be detected in horizontal cavities, and can detect not only in brine media but also in natural gas media. In addition, the present invention also realizes the detection of docking with old brine mining cavities, is not affected by the harsh environment of the old cavities, is not affected by the accumulated residues and sludge in the old cavities, realizes the fine detection of horizontal old cavities, and ensures the smooth reconstruction of the old cavities of salt cavern gas storage.

[0030] The gas and hydrogen storage morphology measurement tool for the salt caverns connected to the brine mining chamber of the present invention expands the diversity of salt cavern detection methods. The detection methods are no longer limited to sonar technology. The camera device adopts image recognition technology to provide technical support for obtaining salt cavern images. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, in which:

[0032] Figure 1 This is a schematic diagram of the Laoqiang salt cavern for connecting to the brine mining site;

[0033] Figure 2 It is a schematic diagram of the structure of a tool for measuring the gas and hydrogen storage morphology of a salt cavern connected to a salt mining cavern according to an embodiment of the present invention.

[0034] Figure 3 Shown is a schematic diagram of a ground control system schematic diagram of one embodiment of the present invention.

[0035] Figure 4 It is a schematic structural diagram of a downhole salt cavern morphology detection system according to an embodiment of the present invention;

[0036] Figure 5 The figure is a schematic diagram of the structure of a sonar detector according to an embodiment of the present invention, showing the propeller in a retracted state;

[0037] Figure 6 The figure is a schematic diagram of the structure of a sonar detector according to an embodiment of the present invention, showing the propeller in a popped-out state;

[0038] Figure 7 It is a schematic diagram of the working of a downhole salt cavern morphology detection system according to an embodiment of the present invention, showing the state of vertical detection in a first salt cavern wellbore;

[0039] Figure 8 It is a schematic diagram of the working of the underground salt cavern morphology detection system according to one embodiment of the present invention, showing the state in which the horizontal detection in the first salt cavern cavity has not yet been carried out;

[0040] Fig. 9 It is a schematic diagram of the working of a downhole salt cavern morphology detection system according to an embodiment of the present invention, showing the state of horizontal detection in a first salt cavern cavity;

[0041] Fig.10 FIG. 1 is a schematic diagram showing the operation of a downhole salt cavern morphology detection system according to an embodiment of the present invention, showing the state of horizontal detection in a second salt cavern cavity.

[0042] The drawings are not drawn to scale.

[0043] The meanings of the reference numerals in the accompanying drawings are as follows:

[0044] 1. Ground control system, 2. Casing, 3. First salt cavern wellbore, 4. Cable, 5. Motor power system, 6. Auxiliary detection and telescopic system, 7. Sonar detector, 51. Cable connector, 52. Motor, 53. Rotating shaft, 71. Camera device, 72. Ultrasonic sensor probe, 73. Rotating system, 74. Propeller, 75. Pressure balance system and electronic compass, 76. Sound speed calibration device, 77. Stabilizing gyroscope, 78. Connecting device. DETAILED DESCRIPTION

[0045] In order to make the technical solutions and advantages of the present invention more clearly understood, the exemplary embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than an exhaustive list of all the embodiments. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0046] With the need for the development of underground natural gas reserves, the construction of underground gas storage will be accelerated; and natural gas reserves have risen to a strategic level. The transformation and utilization of old brine caverns has greatly shortened the construction time of salt caverns. There are many old brine caverns in China, but the difficulty in measuring the morphology of old caverns will limit the development of their utilization. Figure 1 The present invention schematically shows a gas and hydrogen storage morphology measurement tool for a salt cavern that is connected to an old brine mining cavern, which solves the problem of limited cavity measurement operations in a connected old brine mining cavern and expands the detection medium to achieve measurement of salt caverns containing natural gas media in horizontal salt caverns.

[0047] Figure 2 A tool for measuring the gas and hydrogen storage morphology of a salt cavern for docking with a brine mining company according to the present invention is schematically shown, comprising a ground control system 1 and a downhole salt cavern morphology detection system. The ground control system 1 is connected to the downhole salt cavern morphology detection system via a cable 4. The ground control system 1 transmits a control signal to the downhole salt cavern morphology detection system via the cable 4. The downhole salt cavern morphology detection system uploads the detected downhole salt cavern morphology information to the ground control system 1 via the cable 4.

[0048] The ground control system 1 includes a ground adapter and a ground control console. The ground adapter provides power to the underground salt cavern morphology detection system to drive the underground salt cavern morphology detection system to move and detect. The ground control console issues control instructions to the underground salt cavern morphology detection system to control the movement and detection of the underground salt cavern morphology detection system, and receives the signal detected by the underground salt cavern morphology detection system, and analyzes the signal data to obtain the salt cavern morphology information of the mining brine.

[0049] The underground salt cavern morphology detection system comprises a motor power system 5, an auxiliary detection telescopic system 6 and a sonar detector 7. The motor power system 5 is connected to a ground adapter of a ground control system 1 via a cable 4, and the ground adapter supplies power to the motor power system 5 via the cable 4. The motor power system 5 acts on the auxiliary detection telescopic system 6 to provide power for the auxiliary detection telescopic system 6 to telescope and deform.

[0050] The auxiliary detection telescopic system 6 can be extended and deformed, and its front end is connected to the sonar detector 7. When the auxiliary detection telescopic system 6 is extended and deformed, the sonar detector 7 is driven to move, so as to fully detect in the salt cavern. The sonar detector 7 detects the shape of the salt cavern by sonar emission and reception of ultrasonic waves.

[0051] When using the brine mining old cave morphology measurement tool described in this embodiment, the underground salt cave morphology detection system is connected to the ground control system 1 through the cable 4, and is passed through the bottom of the cable 4 to the underground. The staff inputs the control signal through the ground control console of the ground control system 1 to control the operation of the underground salt cave morphology detection system. The ground adapter provides power to the motor power system 5, and the motor power system 5 rotates to drive the auxiliary detection telescopic system 6 to extend, turn and deform. Driven by the motor power system 5 and the auxiliary detection system, the sonar detector 7 moves in the salt cave, and at the same time detects the shape and morphology of the salt cave through sonar.

[0052] In a preferred embodiment, the cable 4 is a three-core cable, which is used to transmit the power of the motor power system 5, control instructions and upload detection signals.

[0053] In one embodiment, the motor power system 5 includes a motor 52, and a transmission shaft and a rotating shaft 53 are provided at the front end of the motor 52. The transmission shaft can rotate with the drive of the motor 52, and the rotating shaft can change in the direction of the transmission shaft, so that the direction of the front end changes. Since the transmission shaft and the rotating shaft 53 are connected to the auxiliary detection telescopic system 6, and further connected to the sonar detector 7, when the direction of the rotating shaft changes, the direction of the sonar detector 7 can be driven to change, thereby controlling the moving direction of the sonar detector 7. As the motor 52 rotates, the transmission shaft transmits the rotational force to the auxiliary detection telescopic system 6, and the auxiliary detection telescopic system 6 extends or contracts accordingly, thereby driving the sonar detector 7 to move forward and backward.

[0054] In the docking salt cavern gas and hydrogen storage morphology measurement tool according to this embodiment, the motor power system 5 provides telescopic power for the auxiliary detection telescopic system 6 through the transmission shaft, and the rotating shaft can bend to turn the auxiliary detection telescopic system 6 and the sonar detector 7 at its end. When the detector enters the salt cavern and completes the vertical movement of the salt cavern horizontal section sonar scanning, the ground sends a rotation command to the motor power system 5, and the auxiliary detection telescopic cylinder and the sonar detector rotate 90 degrees through the rotating shaft, and then the sonar detector changes from vertical movement to horizontal movement. In this way, the sonar detector 7 can move forward and backward and can turn, so that it can detect various positions of the salt cavern and obtain more comprehensive and accurate signals.

[0055] In one embodiment, the ground control console includes a computer terminal, and the operator controls the downhole detector in real time through the human-computer interaction interface of the ground control console. The power supply voltage of the console is 220V AC, which is connected to the adapter through a USB interface. The human-computer interaction interface is the supporting software of the downhole detection system. The software design adopts a structured design scheme, which divides the entire program function into several program modules to facilitate program inspection and debugging.

[0056] In a preferred embodiment, the program modules include a sensor signal acquisition and transmission processing module, a sonar signal acquisition and transmission module, a sonar signal data processing module and a motor control module.

[0057] For the sensor signal acquisition and transmission processing module, the detector position, posture, motion information and internal image information of the salt cavern obtained by the underground sensors and the camera device 71 are transmitted to the ground adapter via the cable 4 for signal amplification and demodulation, and the position, posture and internal image of the underground detector can be displayed in real time on the console. At the same time, the console operator issues instructions to the underground detector based on the real-time data.

[0058] The downhole sonar working mode and scanning parameters are set through the sonar signal acquisition and transmission module. The detector's omnidirectional sonar measurement results of the cavity morphology are fed back to the ground adapter and transmitted to the console after signal amplification and demodulation. The operator gives the next operation instruction based on the data.

[0059] The motor control module, according to the downhole detector position, attitude, motion information, internal image information of the salt cavern and sonar feedback data signal transmitted to the console, the operator issues instructions to the downhole motor power system 5. After all the measurements of the salt cavern are completed, the sonar signal data processing module will post-process all the sonar data to depict the cavity morphology and calculate the cavity volume.

[0060] In one embodiment, the auxiliary detection telescopic system 6 includes a telescopic cylinder composed of a plurality of concentric sleeves. After the auxiliary detection telescopic system 6 rotates 90 degrees, the ground control system 1 issues a cavity measurement command, and the innermost layer of the telescopic cylinder is the central cylinder, which is connected to the sonar detector and is first extended horizontally during extension. As the innermost sleeve is extended horizontally, the sonar detector performs a sonar scan of the vertical section of the salt cavern. When the innermost sleeve is fully extended, the second inner sleeve is extended next, and the sleeves are extended in sequence from the inside to the outside to ensure the continuity of the sonar scan.

[0061] In this embodiment, the extension amount of the telescopic sleeve is determined by the length of the horizontal cavity of the salt cavern, and the measured length on one side is half the length of the horizontal cavity. After the measurement on one side is completed, the ground control system 1 issues a retraction command, and the sleeves are retracted from the outside to the inside in sequence. After the telescopic sleeve is retracted, the detection telescopic sleeve and the sonar detector are rotated back to the initial well entry position through the rotating shaft. In this embodiment, the auxiliary telescopic sleeve is preferably made of lightweight material.

[0062] In one embodiment, the sonar detector 7 includes a camera 71 and an ultrasonic sensor probe 72 arranged at the front end, and the camera 71 can take pictures in the salt cavern, shoot the salt cavern, and feed back the image or video information of the salt cavern directly piped to the ground control system 1, to assist in analyzing the cavity sonar detection results. The ultrasonic sensor probe 72 includes sonar probes of different frequencies, which can emit different ultrasonic waves, and detect the morphology of the salt cavern by ultrasonic emission and reception. A rotating system 73 is arranged at the rear end of the ultrasonic sensor, and the rotating system 73 rotates after the sonar measurement starts, and performs a 360-degree uniform rotation scan on the horizontal and vertical sections of the salt cavern to obtain the cavity morphology. In this embodiment, the camera 71 is preferably a starlight-level camera.

[0063] The gas and hydrogen storage morphology measurement tool for the salt caverns in this embodiment expands the diversity of salt cavern detection methods. The detection methods are no longer limited to sonar technology. The camera device 71 uses image recognition technology to provide technical support for obtaining salt cavern images.

[0064] In a preferred embodiment, a propeller 74 that can be extended or retracted is also provided at the rear end of the rotating system 73. After the sonar detector 7 rotates to measure the horizontal cavity section, the propeller 74 pops out and runs, and the movement stability of the detector can be maintained by the rotation of the propeller 74. When the horizontal cavity section measurement of one side of the salt cavern is completed, the propeller 74 is retracted.

[0065] A pressure balance system and an electronic compass 75 are provided at the rear end of the propeller 74. A chamber is provided inside the pressure balance system, and the pressure inside the measuring chamber device and the external environment are kept balanced by filling and draining hydraulic oil. The electronic compass is responsible for positioning the detector.

[0066] A sound velocity calibration device 76 and a stabilizing gyro 77 are provided at the rear end of the pressure balance system and the electronic compass 75. The sound velocity calibration device 76 can measure the ultrasonic velocity under different brine concentrations. The stabilizing gyro 77 can eliminate the swing of the measuring cavity device during measurement, ensuring that the ultrasonic sensor probe 72 transmits and receives ultrasonic signals in a stable state.

[0067] The salt cavern gas and hydrogen storage morphology measurement tool for docking the old brine mining cavity in this embodiment solves the problem of the limitation of the medium that can be detected in the horizontal cavity. It can detect not only in the brine medium, but also in the natural gas medium. In addition, this embodiment also realizes the detection of the docking brine mining cavity, which is not affected by the harsh environment of the old cavity, and is not affected by the accumulated residue and silt in the old cavity, and realizes the fine detection of the horizontal old cavity, ensuring the smooth reconstruction of the old cavity of the salt cavern gas storage.

[0068] According to another aspect of the present invention, a detection method is also proposed, wherein the detection method uses the salt cavern morphology detection tool for docking with the old cavern for mining salt according to the above embodiment to detect the salt cavern. The method comprises the following steps:

[0069] Assemble the salt cavern morphology detection tool for docking with the old salt cavern for mining, and after assembly, put the salt cavern morphology detection system into the well. Starting from the first salt cavern wellbore 3 entering the well, the ground begins to receive downhole signals in real time;

[0070] When the salt cavern morphology detection system enters the salt cavern, the brine sound velocity calibration is first performed, the measurement angle and step length are set on the ground, the sound wave frequency of the ultrasonic sensor probe 72 is selected, and the sonar measurement is started, and each measurement point is rotated 360 degrees in the vertical direction for measurement;

[0071] Driven by the motor power system 5, the auxiliary detection telescopic system 6 and the sonar detector rotate 90 degrees to detect the horizontal cavity; the auxiliary detection telescopic system 6 gradually extends, and each measuring point in the horizontal direction of the salt cavern rotates 360 degrees for measurement;

[0072] Then, the auxiliary detection telescopic system 6 and the sonar detector are retracted and rotated, and the salt cavern morphology detection system is lifted out of the wellbore to the surface;

[0073] Then enter the well through the second salt cavern wellbore and repeat the above operation;

[0074] Finally, the cavity measurement data of the first salt cavern wellbore 3 and the second salt cavern wellbore are integrated and interpreted to obtain a complete morphological characterization of the salt cavern cavity.

[0075] In a specific embodiment, the detailed steps of the method are as follows:

[0076] The manufactured and assembled salt cavern morphology detection system for docking with the old cavern for salt mining is connected to the cable 4 on the ground and then put into the well.

[0077] From the time the first salt cavern wellbore 3 enters the well, the ground begins to receive downhole signals in real time, and the detector shape, position and downhole images captured by the camera device 71 are transmitted to the ground in real time. When the detector enters the salt cavern, the sonar detector sound velocity calibration device 76 first calibrates the brine sound velocity, and the stabilizing gyro 77 keeps the detector sonar stable when transmitting and receiving sound waves.

[0078] After the preparations are completed, the measurement angle step is set on the ground, the ultrasonic sensor probe 72 sound wave frequency is selected, and the sonar measurement is started. Each measurement point is rotated 360 degrees in the vertical direction. Figure 6 As shown in the figure, the vertical cavity shape on one side of the first salt cavern wellbore 3 is depicted, but the horizontal cavity on the other side is beyond the acoustic wave detection range due to the long horizontal section. After obtaining the vertical cavity shape data on one side, the ground technicians check the acquired data and confirm that the data quality meets the requirements before detecting the horizontal cavity.

[0079] The ground control system 1 issues a command, and driven by the motor power system 5, the auxiliary detection telescopic system 6 and the sonar detector rotate 90 degrees to the horizontal direction. Figure 8 shown.

[0080] After the rotation is completed, the propeller 74 on the sonar detector pops out and works to keep the detector sonar cavity measurement stable. After completing the above steps, the ground control system 1 sets the horizontal cavity measurement parameters. According to the set cavity measurement parameters, the sleeve in the auxiliary detection telescopic system 6 is extended from the inside to the outside in sequence under the drive of the motor power system 5. As the sleeve is extended, each measurement point in the horizontal direction of the salt cavity is rotated 360 degrees for measurement. Fig. 9 shown.

[0081] When the ultrasonic sensor probe 72 moves to half the distance of the horizontal cavity, the sound wave emission is stopped, and the measurement of the salt cavern is completed. The telescopic sleeve is retracted from the outside to the inside. After the sleeve is retracted, the sonar detector propeller 74 is retracted. The auxiliary detection telescopic system 6 and the sonar detector are rotated 90 degrees and returned to the initial vertical position. Then the detector is lifted out of the wellbore to the ground.

[0082] After that, the detector is transported to the second salt cavern wellbore, and the detection steps are the same as those of the first salt cavern wellbore 3. The ground begins to receive downhole signals in real time, and the detector shape, position and downhole images captured by the camera device 71 are transmitted to the ground in real time. When the detector enters the salt cavern, the sonar detector sound velocity calibration device 76 first calibrates the brine sound velocity, and the stabilizing gyro 77 keeps the detector sonar stable when transmitting and receiving sound waves.

[0083] After the preparations were completed, the measurement angle step was set on the ground, the sound wave frequency of the ultrasonic sensor probe 72 was selected, and the sonar measurement was started. Each measurement point was rotated 360 degrees in the vertical direction, and the vertical cavity shape on one side of the first salt cavern wellbore 3 was depicted. After obtaining the vertical cavity shape data on one side, the ground technicians checked the acquired data and confirmed that the data quality met the requirements before conducting horizontal cavity detection.

[0084] The ground control system 1 issues a command, and driven by the motor power system 5, the auxiliary detection telescopic system 6 and the sonar detector rotate 90 degrees to the horizontal direction. Fig.10 The horizontal angle at this time is opposite to the horizontal angle in the first salt cavern wellbore 3.

[0085] After the rotation is completed, the propeller 74 on the sonar detector pops up and works to keep the detector sonar cavity measurement stable. After completing the above steps, the ground control system 1 sets the horizontal cavity measurement parameters. According to the set cavity measurement parameters, the sleeve in the auxiliary detection telescopic system 6 is extended from the inside to the outside in sequence under the drive of the motor power system 5. As the sleeve is extended, each measurement point in the horizontal direction of the salt cavity is rotated 360 degrees for measurement.

[0086] When the ultrasonic sensor probe 72 moves to half the distance of the horizontal cavity, the sound wave emission is stopped, and the measurement of the salt cavern is completed. The telescopic sleeve is retracted from the outside to the inside. After the sleeve is retracted, the sonar detector propeller 74 is retracted. The auxiliary detection telescopic system 6 and the sonar detector are rotated 90 degrees and returned to the initial vertical position. Then the detector is lifted out of the wellbore to the ground.

[0087] The gas and hydrogen storage morphology measurement tool and method for docking the old salt caverns for brine mining described in this embodiment can achieve the expansion of the detection range of salt caverns. Compared with the prior art, the docking old salt cavern morphology detector of the present invention has higher flexibility and a larger detection range, especially for the detection of horizontal cavities, which solves the limitations of traditional sonar measurement technology in detection range.

[0088] The present invention's tool for measuring gas and hydrogen storage morphology in salt caverns for docking with old brine mining cavities solves the problem of the limitations of the medium that can be detected in horizontal cavities, and can detect not only in brine media but also in natural gas media. In addition, the present invention also realizes the detection of docking with old brine mining cavities, is not affected by the harsh environment of the old cavities, is not affected by the accumulated residues and sludge in the old cavities, realizes the fine detection of horizontal old cavities, and ensures the smooth reconstruction of the old cavities of salt cavern gas storage.

[0089] The gas and hydrogen storage morphology measurement tool for the salt caverns connected to the brine mining chamber of the present invention expands the diversity of salt cavern detection methods. The detection methods are no longer limited to sonar technology. The camera device adopts image recognition technology to provide technical support for obtaining salt cavern images.

[0090] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and / or modifications that fall within the scope of the present invention, and changes and / or modifications made according to the embodiments of the present invention should be included within the scope of protection of the present invention.

Claims

1. A tool for measuring the gas and hydrogen storage morphology of salt caverns connected to the brine mining pit, characterized in that: include: A ground control system (1), which includes a ground adapter and a ground control console; as well as An underground salt cavern morphology detection system, comprising an electric motor power system (5), an auxiliary detection telescopic system (6) and a sonar detector; The ground control system (1) is connected to the underground salt cavern morphology detection system via a cable (4), and controls the underground rock cavern morphology detection system to detect the salt cavern morphology.

2. The gas and hydrogen storage morphology measurement tool for docking salt mining old caverns according to claim 1 is characterized in that: The motor power system (5) comprises a motor (52), the front end of the motor (52) being provided with a transmission shaft and a rotating shaft (53) connected to the auxiliary detection telescopic system (6), and the rear end of the motor (52) being provided with a cable connector (51) connected to the cable (4).

3. The gas and hydrogen storage morphology measurement tool for docking salt mining old caverns according to claim 2 is characterized in that: The ground control console comprises a computer terminal, a plurality of program modules are installed in the computer terminal, and the computer terminal is connected to the ground adapter via a USB interface.

4. The gas and hydrogen storage morphology measurement tool for docking salt mining old caverns according to claim 3 is characterized in that: The program modules include a sensor signal acquisition and transmission processing module, a sonar signal acquisition and transmission module, a sonar signal data processing module and a motor control module.

5. The gas and hydrogen storage morphology measurement tool for docking salt mining old caverns according to claim 4 is characterized in that: The auxiliary detection telescopic system (6) comprises a telescopic tube composed of a plurality of concentric sleeves, the innermost layer of the concentric sleeves being a central tube, and the sonar detector (7) is connected to the central tube.

6. The gas and hydrogen storage morphology measurement tool for docking salt mining old caverns according to claim 5 is characterized in that: The sonar detector (7) comprises an ultrasonic sensor probe (72) arranged at the front end and a camera device (71), and the ultrasonic sensor probe (72) is provided with sonar probes of different frequencies.

7. The gas and hydrogen storage morphology measurement tool for docking salt mining old caverns according to claim 6 is characterized in that: A rotation system (73) is provided at the rear end of the ultrasonic probe sensor to drive the ultrasonic sensor probe (72) to rotate, thereby performing a 360-degree uniform rotation scan on the horizontal section and the vertical section of the salt cavern to obtain the cavity shape.

8. The gas and hydrogen storage morphology measurement tool for docking salt mining old caverns according to claim 7 is characterized in that: The rotating system (73) is also provided with a propeller (74) that can be extended or retracted to keep the movement of the detector stable during the horizontal section measurement process.

9. The gas and hydrogen storage morphology measurement tool for docking salt mining old caverns according to claim 8 is characterized in that: A pressure balance system and an electronic compass (75) are provided at the rear end of the propeller (74).

10. The gas and hydrogen storage morphology measurement tool for docking salt mining old caverns according to claim 9 is characterized in that: A sound velocity calibration device (76) is arranged at the rear end of the pressure balance system and the electronic compass (75).

11. The gas and hydrogen storage morphology measurement tool for docking salt mining old caverns according to claim 10 is characterized in that: A stabilizing gyroscope (77) is provided at the rear end of the sound velocity calibration device (76), and the rear end of the stabilizing gyroscope (77) is connected to the auxiliary detection telescopic system (6) via a connecting device (78).

12. A method for measuring the morphology of salt caverns using the salt cavern gas and hydrogen storage morphology measurement tool according to any one of claims 1 to 11, characterized in that: include: Assembling the salt cavern morphology detection tool for docking with the old salt mining cavity, after which the salt cavern morphology detection system is put into the well, and starting from the first salt cavern wellbore (3) being put into the well, the ground begins to receive downhole signals in real time; When the salt cavern morphology detection system enters the salt cavern, the brine sound velocity is calibrated first, the measurement angle step is set on the ground, the sound wave frequency of the ultrasonic sensor probe (72) is selected, and the sonar measurement is started, and each measurement point is rotated 360 degrees in the vertical direction for measurement; Driven by the motor power system (5), the auxiliary detection telescopic system (6) and the sonar detector rotate 90 degrees to detect the horizontal cavity; the auxiliary detection telescopic system (6) gradually extends, and each measuring point in the horizontal direction of the salt cavern rotates 360 degrees for measurement; Afterwards, the auxiliary detection telescopic system (6) and the sonar detector are retracted section by section, and driven by the motor power system (5), they are rotated 90 degrees and rotated back to a vertical state, and the salt cavern morphology detection system is lifted out of the wellbore to the ground. Then enter the well through the second salt cavern wellbore and repeat the above operation; Finally, the cavity measurement data of the first salt cavern wellbore (3) and the second salt cavern wellbore are integrated and interpreted to obtain a complete morphological description of the salt cavern cavity.

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