Multi-channel seismic data frequency-broadening acquisition device and method

Abstract

The invention provides a multi-channel seismic data frequency-broadening acquisition device and method, the multi-channel seismic data frequency-broadening acquisition device comprises a plurality of built-in detectors, a multi-channel data acquisition unit, a main controller and a data memory, the plurality of built-in detectors are connected to the multi-channel data acquisition unit, and the main controller is connected to the multi-channel data acquisition unit. The main controller is connected to the multi-channel collector and the data memory, the multi-channel data collector collects data of the plurality of built-in detectors under the control of the main controller, groups and packs the data, and sends the data to the main controller according to a data packet in a fixed format; and the main controller transmits the data packet to the data memory for storage. According to the multi-channel seismic data frequency-broadening acquisition device and method, the purpose of seismic exploration broadband acquisition is achieved, the advantages of instrument construction are brought into play, and the low-cost strategy of current seismic exploration is met.

Description

Technical Field

[0001] The present invention relates to the technical field of oilfield development, and particularly to a multi-channel seismic data frequency-expanded acquisition device and method. Background Art

[0002] With the development of exploration technologies, for the development of hidden oil and gas reservoirs such as complex fault blocks, deep buried hills, igneous rocks, and subsalt layers, it is urgent to expand low-frequency and high-frequency information for the identification of reservoirs and sand body boundaries below 20m to ensure sufficient bandwidth. Full waveform inversion highly depends on low-frequency information, and rich low-frequency information can achieve accurate imaging and accurate velocity modeling. The absence of low-frequency information will result in false event axes, affecting deep imaging. The low signal-to-noise ratio of high-frequency signals limits the identification of thin layers. Therefore, it is necessary to expand the frequency band information in both the low-frequency and high-frequency directions to increase the dominant frequency of seismic data and enhance the identification ability of deep and thin layers. Frequency band expansion mainly depends on two factors: excitation and reception. In terms of excitation, the current situation can meet the requirements. In terms of reception, the acquisition of low-frequency signals requires low-frequency geophones, and high-frequency signals require geophones with strong high-frequency reception capabilities. Most of the existing instruments and technical methods are equipped with single-channel geophones, which cannot effectively expand low-frequency and high-frequency information. The current solution is to arrange multiple arrays on a survey line, connect different types of geophones at the same physical point respectively to achieve multi-geophone reception for one channel, and finally through a certain algorithm, data synthesis is carried out to obtain high-resolution original data with rich low-frequency and high-frequency components and a wider frequency band. However, this solution has a large workload, poor commonality, requires a lot of equipment, and is costly, making it unsuitable for field operations.

[0003] In the Chinese patent application with the application number: CN201811311024.3, a multi-channel three-dimensional seismic physical simulation data acquisition method and device are involved. The method includes: setting data acquisition parameters; when the gun line number of the shot point is odd, judging the shot number of the shot point; when the shot number is odd, the excitation point moves along the positive x-axis direction to excite the C-channel signal; when the shot number is even, the excitation point moves along the negative x-axis direction to excite the C-channel signal; the receiving point of the i-th channel acquires one-shot seismic data, the excitation point moves m distance along the positive y-axis direction, the shot number is incremented, and when the shot number reaches M, the acquisition of each shot point is completed; the excitation point returns to the initial excitation position, and the receiving point moves i*l distance along the positive y-axis direction; when the gun line number is even, the receiving point moves i*l distance along the negative y-axis direction; each time the receiving point moves, the number of movements is incremented, and when the number of movements reaches the preset condition, the acquisition of one-line shot points is completed; the excitation point and the receiving point both move n distance along the positive x-axis direction, and the gun line number is incremented; when the gun line number is greater than N, the acquisition of the receiving point ends.

[0004] In the Chinese patent application with the application number: CN202110538423.9, it involves a multi-channel data acquisition control circuit, including: a network port unit, including a first extended network port unit and a second extended network port unit, for accessing data acquisition devices through the first extended network port unit and the second extended network port unit; a communication port unit, for sending the data collected by the data acquisition devices to data receiving devices; a serial port unit, for providing a UART port; a storage unit, for storing data based on a mass storage medium; a clock management unit, for receiving network timing signals; a chip U1, for managing the network port unit, the communication port unit, the serial port unit, the storage unit and the clock management unit; by accessing data acquisition devices based on the first extended network port unit and the second extended network port unit, and sending data based on the communication port unit, the data acquisition efficiency is further improved.

[0005] In the Chinese patent application with the application number: CN201110299326.5, it involves a method for real-time acquisition of multi-viewpoint stereo images using fewer cameras, and provides a data acquisition board that can effectively suppress interference, has high integration, and is nanosecond-level. The technical solution adopted by the present invention is a multi-channel seismic signal acquisition device with high synchronization accuracy, including: a preamplifier, an analog-to-digital converter. The signals detected by each sensor are respectively transmitted to a channel of the analog-to-digital conversion chip after passing through a preamplifier, a multiplexer, a gain adjustment circuit, and a signal conditioning circuit. The data output by the analog-to-digital conversion chip is transmitted to a data receiver and forwarder through a data preprocessor; in addition, it further includes: a gain control module, a self-test control module, a command decoder, a synchronous clock receiver, and a data receiver and forwarder. This invention is mainly applied to geological exploration.

[0006] In the Chinese patent application with the application number: CN201110136852.X, it involves a multi-channel data acquisition unit, belonging to the technical field of data acquisition in test and measurement. This acquisition unit is composed of multiple acquisition channels, a test channel, and an acquisition unit control module; each acquisition channel includes a conditioning circuit composed of a conventional filter circuit and a voltage protection circuit, an electronic switch, and a Δ∑ analog-to-digital converter. The test channel is composed of a Δ∑ digital-to-analog converter. The acquisition unit control module is implemented based on a programmable logic controller chip; the multiple acquisition channels are connected to the acquisition unit control module; the input end of the Δ∑ digital-to-analog converter is connected to the output end of the acquisition unit control module, and the output end of the Δ∑ digital-to-analog converter is respectively connected to the electronic switches and the Δ∑ analog-to-digital converters of each acquisition channel. This invention can not only achieve high dynamic range, low input noise, low harmonic distortion, low crosstalk, and high common-mode rejection ratio, but also meet the requirements of low power consumption and low cost.

[0007] The above prior arts are quite different from the present invention and cannot solve the technical problems we want to address. Therefore, we have invented a multi-channel seismic data frequency extension acquisition device and method. Summary of the Invention

[0008] The object of the present invention is to provide a multi-channel seismic data frequency extension acquisition device and method that effectively expands the frequency band of the acquired data and reduces the usage cost in practical applications.

[0009] The object of the present invention can be achieved by the following technical measures: A multi-channel seismic data frequency extension acquisition device, which includes multiple built-in geophones, a multi-channel data collector, a main controller, and a data memory. The multiple built-in geophones are all connected to the multi-channel data collector, the main controller is connected to the multi-channel collector and the data memory. Under the control of the main controller, the multi-channel data collector collects the data of the multiple built-in geophones, groups and packs the data, and sends the data packets in a fixed format to the main controller. The main controller transmits the data packets to the data memory for storage.

[0010] The object of the present invention can also be achieved by the following technical measures:

[0011] The multi-channel seismic data frequency extension acquisition device further includes a GNSS satellite timing and synchronization system, which is connected to the multi-channel data collector. The GNSS satellite timing and synchronization system receives satellite signals and uses the satellite clock system to calibrate and synchronize the local clock system, so as to mark accurate satellite time for the continuously recorded seismic data.

[0012] The multi-channel seismic data frequency extension acquisition device further includes a battery pack and a power management module. The battery pack is connected to the power management module, and the power management module is connected to the GNSS satellite timing and synchronization system, the multi-channel data collector, and the main controller to provide power for them.

[0013] The multi-channel seismic data frequency extension acquisition device further includes an end cap and a bottom barrel. A stacked circuit board is connected below the end cap. The GNSS satellite timing and synchronization system, the multi-channel data collector, and the main controller are all located on the stacked circuit board. The bottom barrel is divided into upper and lower parts. The upper part installs a fixed bracket for the battery pack, and the battery pack is placed inside the bracket to provide power support for the upper stacked circuit board. The lower part of the bottom barrel installs a geophone mounting skeleton for placing the multiple built-in geophones. There is a tail vertebra mounting hole at the bottom of the bottom barrel, which is convenient for field deployment after installing the tail vertebra. There are external contacts on the top of the end cap for data transmission and data download through a data transfer cable.

[0014] The multiple built-in detectors can be installed in various ways by matching different detector mounting skeletons. They can all be vertical, all used to detect vibration signals in the vertical direction, or can be made into an orthogonal three-component form to collect seismic data in the X, Y, and Z axis directions, and can be expanded and extended according to actual usage requirements.

[0015] The number of the multiple built-in detectors can be four or more.

[0016] The natural frequencies of the multiple built-in detectors can be a combination of multiple types and can be selected and configured according to needs.

[0017] The connection method of the multiple built-in detectors can be that each built-in detector is connected to a data acquisition channel of the multi-channel data acquisition device, or the built-in detectors with specific frequencies are locally connected in series and then connected to a data acquisition channel of the multi-channel data acquisition device, so as to improve the sensitivity in a specific frequency band.

[0018] The object of the present invention can also be achieved by the following technical measures: a multi-channel seismic data frequency-expanded acquisition method, which adopts a multi-channel seismic data frequency-expanded acquisition device, including:

[0019] Step 1, place multiple built-in detectors on the detector mounting skeleton and connect them to the multi-channel data acquisition device;

[0020] Step 2, after the multi-channel seismic data frequency-expanded acquisition device is powered on, the GNSS satellite timing and synchronization system receives satellite signals and uses the satellite clock system to calibrate and synchronize the local clock system, so as to mark accurate satellite time for the continuously recorded seismic data;

[0021] Step 3, under the control of the main controller, the multi-channel data acquisition device acquires data of multiple built-in detectors, groups and packs the data, and sends the data packets in a fixed format to the main controller;

[0022] Step 4, the main controller transmits the data packets to the data memory for storage.

[0023] The object of the present invention can also be achieved by the following technical measures:

[0024] In Step 1, the connection method of the multiple built-in detectors can be that each built-in detector is connected to a data acquisition channel of the multi-channel data acquisition device, or the built-in detectors with specific frequencies are locally connected in series and then connected to a data acquisition channel of the multi-channel data acquisition device, so as to improve the sensitivity in a specific frequency band.

[0025] In step 1, the number of multiple built-in detectors used can be four or more. The natural frequencies of the multiple built-in detectors can be a combination of multiple types and are selected and configured as needed.

[0026] In step 1, the multiple built-in detectors are installed in various ways by matching different detector mounting skeletons. They can all be vertical, all used to detect vibration signals in the vertical direction, or can be made in the form of orthogonal three-component to collect seismic data in the XYZ three-axis directions, and can be expanded and extended according to actual usage requirements.

[0027] The multi-channel seismic data frequency-expanding acquisition device and method of the present invention can perform synchronous data acquisition, effectively expand the frequency band of the acquired data, and reduce the actual application cost. By integrating multiple detectors of different types or different natural frequencies in the same acquisition instrument for synchronous data acquisition, it effectively expands the frequency band of the acquired data and reduces the usage cost in actual applications. The multi-channel seismic data frequency-expanding acquisition device and method achieve the purpose of multi-channel acquisition by installing multiple high-sensitivity detectors inside one instrument, and through the research and development of functional modules, realize the synchronous data acquisition of multiple detectors in one instrument. The internal multi-channel detectors involved in the present invention can install four detectors or detectors inside, and the type and frequency of the sensors can be selected according to needs, and the installation direction of the sensors can also be selected according to needs, such as four vertical, two horizontal or two longitudinal, etc. By installing detectors of different types and different natural frequencies inside, using multi-channel technology to simultaneously collect seismic signals, and through post-data synthesis technology, the purpose of wide-band acquisition in seismic exploration is achieved, solving the "bottleneck" problem encountered in the old oil areas in the east, giving full play to the advantages of instrument construction and conforming to the current low-cost strategy of seismic exploration. Brief Description of the Drawings

[0028] Figure 1 It is the system block diagram of the multi-channel seismic data frequency-expanding acquisition device in a specific embodiment of the present invention;

[0029] Figure 2 It is the installation schematic diagram of multi-type seismic detectors in a specific embodiment of the present invention;

[0030] Figure 3 It is the internal structure schematic diagram of the multi-channel seismic data frequency-expanding acquisition device in a specific embodiment of the present invention. Detailed Description of the Invention

[0031] It should be noted that the following detailed description is exemplary and is intended to provide further illustration of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, and / or combinations thereof.

[0033] The multi-channel seismic data frequency-expanding acquisition device of the present invention includes a plurality of built-in geophones, a multi-channel data collector, a main controller, a GNSS satellite timing and synchronization system, a data memory, a battery pack, and a power management module. The plurality of built-in geophones are all connected to the multi-channel data collector, and the main controller is connected to the multi-channel collector and the data memory. Under the control of the main controller, the multi-channel data collector collects the data of the plurality of built-in geophones, groups and packs the data, and sends the data packets in a fixed format to the main controller. The main controller transmits the data packets to the data memory for storage. The GNSS satellite timing and synchronization system is connected to the multi-channel data collector and uses the satellite clock system to calibrate and synchronize the local clock system. The battery pack is connected to the power management module, and the power management module is connected to the GNSS satellite timing and synchronization system, the multi-channel data collector, and the main controller to provide power for them.

[0034] The multi-channel seismic data frequency-expanding acquisition device further includes an end cap and a bottom barrel. A stacked circuit board is connected below the end cap, and the GNSS satellite timing and synchronization system, the multi-channel data collector, and the main controller are all located on the stacked circuit board. The bottom barrel is divided into upper and lower parts. The upper part installs a fixing bracket for the battery pack, and the battery pack is placed inside the bracket to provide power support for the stacked circuit board above. The lower part of the bottom barrel installs a geophone mounting skeleton for placing the plurality of built-in geophones. A tail vertebra mounting hole is left at the bottom of the bottom barrel, and after installing the tail vertebra, it is convenient for field deployment. There are external contacts on the top of the end cap, and data transmission and data download are carried out through a data transfer cable.

[0035] The multi-channel seismic data frequency-expanding acquisition method of the present invention includes:

[0036] Step 1, place a plurality of built-in geophones on the geophone mounting skeleton and connect them to the multi-channel data collector;

[0037] Step 2, after the multi-channel seismic data frequency-expanding acquisition device is powered on, the GNSS satellite timing and synchronization system receives satellite signals and uses the satellite clock system to calibrate and synchronize the local clock system, so as to mark accurate satellite time for the continuously recorded seismic data;

[0038] Step 3: Under the control of the master controller, the multi-channel data collector collects data from multiple built-in detectors, groups and packages the data, and sends the data packets in a fixed format to the main controller.

[0039] Step 4: The main controller transfers the data packets to the data storage for storage.

[0040] For a multi-channel seismic data frequency-expanded acquisition device and method involved in the present invention, its specific implementation method is as follows.

[0041] The multi-channel seismic data frequency-expanded acquisition device uses a low-power ARM master controller as the core, which is responsible for the control of the system working process and data recording and storage, provides communication interfaces and control interfaces for multi-channel detector signals, memory, GNSS module, etc., and adopts a star topology structure with peripheral functional modules / test modules. The device internally adopts a four-channel input mode, and four internal vertical sensor channels or three internal + one external sensor channel can be selected. This design has sufficient flexibility to externally connect new sensors as needed. The multi-channel data collector groups and packages the collected multi-channel sensor data, and sends the data packets in a fixed format to the main controller for storage. In this way, the data acquisition task is fully decentralized to the acquisition module, effectively reducing the burden on the main controller.

[0042] Multiple high-sensitivity detectors inside the device are placed at the bottom layer inside the acquisition instrument barrel through a dedicated installation skeleton, which is convenient for better receiving seismic signals after being laid or buried. The number of detectors can be four or more. The natural frequencies of the detectors can be a combination of multiple types, such as 1Hz, 5Hz, 10Hz, 100Hz, etc., and can be selected and configured according to needs. Above the high-sensitivity detectors is an internal lithium battery pack, which is connected and fixed by a battery pack fixing bracket. Inside the upper end cover is a stacked circuit board, and the signals of multiple high-sensitivity detectors are connected to the stacked circuit board inside the end cover through twisted leads for signal conditioning and data acquisition and storage.

[0043] The connection method of the detectors is also flexible. Each detector can be connected to a data acquisition channel, or detectors with specific frequencies can be locally connected in series and then connected to the acquisition channel to improve the sensitivity of a specific frequency band. The installation direction of the detectors is not fixed, and multiple installation methods can be formed by supporting different installation skeletons. For example, all four or more detectors are vertical and are all used to detect vertical vibration signals. It can also be made into an orthogonal three-component form to collect seismic data in the XYZ three-axis directions. It can be expanded and extended according to actual usage requirements. This solution has sufficient flexibility to externally connect various new sensors as needed.

[0044] By configuring methods such as the type, frequency, direction, and connection relationship of geophones, multiple high-sensitivity geophones can be applied inside the same acquisition instrument to achieve synchronous data acquisition, thereby effectively expanding the frequency band of seismic acquisition data to ensure sufficient bandwidth and enriching the diversity of acquired data. The method provided by the present invention provides effective assistance for the original data of seismic acquisition and also lays a solid foundation for subsequent high-resolution data processing and inversion.

[0045] The following are several specific embodiments of applying the present invention

[0046] Embodiment 1

[0047] In a specific Embodiment 1 of applying the present invention, as Figure 1 shown, Figure 1 is the system block diagram of the multi-channel seismic data frequency-expanding acquisition device of the present invention, briefly showing the connection relationship and working process among the various parts of the device. The built-in geophones ① of various models placed in the multi-channel device are connected to the multi-channel data collector ③. After the node is powered on, satellite timing and synchronization are first performed by the GNSS satellite timing and synchronization system ②. After synchronization is completed, data acquisition is carried out under the control of the main controller ④, and the acquired data is stored in the data memory ⑤. The multi-channel device is powered by the battery pack ⑥ after being processed by the power management module ⑦ to provide power for the GNSS satellite timing and synchronization system ②, the multi-channel data acquisition ③, and the main controller ④.

[0048] Embodiment 2

[0049] In a specific Embodiment 2 of applying the present invention, as Figure 2 shown, Figure 2 is the installation schematic diagram of multi-type seismic geophones of the multi-channel seismic data frequency-expanding acquisition device of the present invention. The lower part of the bottom barrel of the multi-channel seismic data frequency-expanding acquisition device is divided into four parts of different sizes by the installation skeleton, and different models of geophones are vertically fixedly installed and connected to the acquisition module, and data acquisition can be carried out simultaneously.

[0050] As Figure 3 shown, Figure 3It is a schematic diagram of the internal structure of the multi-channel seismic data frequency extension acquisition device of the present invention. The multi-channel seismic data frequency extension acquisition device is divided into two main parts: the end cover 21 and the bottom barrel 22. The lower part of the end cover 21 is connected to the stacked circuit board 27, which is composed of a communication module, a central control module, and a acquisition module. The bottom barrel is divided into upper and lower parts. The upper part is equipped with a battery pack fixing bracket 26, and a lithium battery pack 25 is placed inside the bracket to provide power support for the upper stacked circuit board 27. The lower part of the bottom barrel is equipped with a geophone installation skeleton 24, which divides the space into four parts of different sizes, and different models of geophones are vertically and fixedly installed respectively, and are connected to the acquisition module in the stacked circuit board 27. Several geophones can collect data simultaneously. There is a tail vertebra installation hole 23 at the bottom of the bottom barrel, which is convenient for field deployment after installing the tail vertebra. There are external contacts 28 on the top of the end cover, and data can be transmitted and downloaded through a data transfer cable.

[0051] Embodiment 3

[0052] In a specific Embodiment 3 of applying the present invention, 10 multi-channel instrument prototypes developed were used to conduct on-site tests in the Jiangjiadian project, and relevant data were obtained. Through data processing, high-resolution original data with rich low-frequency and high-frequency components and a wider frequency band were obtained. Next, large-scale experiments will be carried out to obtain more abundant technical data, laying a solid foundation for subsequent high-resolution processing and inversion.

[0053] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

[0054] Except for the technical features described in the specification, the rest are the known technologies of those skilled in the art.

Claims

1. Multichannel seismic data extended-frequency acquisition device, characterized in that, The multi-channel seismic data frequency-expanded acquisition device includes a plurality of built-in geophones, a multi-channel data collector, a main controller, and a data memory. The plurality of built-in geophones are all connected to the multi-channel data collector. The main controller is connected to the multi-channel collector and the data memory. Under the control of the main controller, the multi-channel data collector collects the data of the plurality of built-in geophones, groups and packages the data, and sends the data packets in a fixed format to the main controller. The main controller transmits the data packets to the data memory for storage.

2. The multi-channel seismic data frequency-expanded acquisition device according to claim 1, wherein The multi-channel seismic data frequency-expanded acquisition device further includes a GNSS satellite timing and synchronization system. The GNSS satellite timing and synchronization system is connected to the multi-channel data collector. The GNSS satellite timing and synchronization system receives satellite signals and uses the satellite clock system to calibrate and synchronize the local clock system, so as to mark accurate satellite time for the continuously recorded seismic data.

3. The multi-channel seismic data frequency-expanded acquisition device according to claim 2, wherein, The multi-channel seismic data frequency-expanded acquisition device further includes a battery pack and a power management module. The battery pack is connected to the power management module. The power management module is connected to the GNSS satellite timing and synchronization system, the multi-channel data collector, and the main controller to provide power for them.

4. The multi-channel seismic data frequency-expanded acquisition device according to claim 3, wherein, The multi-channel seismic data frequency-expanded acquisition device further includes an end cap and a bottom barrel. A stacked circuit board is connected below the end cap. The GNSS satellite timing and synchronization system, the multi-channel data collector, and the main controller are all located on the stacked circuit board. The bottom barrel is divided into upper and lower parts. The upper part installs a fixed bracket for the battery pack, and the battery pack is placed inside the bracket to provide power support for the upper stacked circuit board. The lower part of the bottom barrel installs a geophone installation skeleton for placing the plurality of built-in geophones. A tail vertebra installation hole is left at the bottom of the bottom barrel. After installing the tail vertebra, it is convenient for field deployment. There are external contacts on the top of the end cap for data transmission and data download through a data transfer cable.

5. The multi-channel seismic data frequency-expanded acquisition device according to claim 4, wherein, The plurality of built-in geophones can be installed in various ways by matching different geophone installation skeletons. They can all be vertical, all used to detect vibration signals in the vertical direction, or can be made in the form of orthogonal three-component to collect seismic data in the XYZ three-axis directions, and can be expanded and extended according to actual usage requirements.

6. The multi-channel seismic data frequency extended acquisition device according to claim 1, wherein The number of the plurality of built-in geophones can be four or more.

7. The multi-channel seismic data frequency-expanded acquisition device according to claim 1, wherein The natural frequencies of the plurality of built-in geophones can be a combination of multiple types and can be selected and configured according to needs.

8. The multi-channel seismic data frequency-expanded acquisition device according to claim 1, characterized in that The connection method of the plurality of built-in geophones can be that each built-in geophone is connected to a data acquisition channel of the multi-channel data collector, or the internal geophones with specific frequencies are locally connected in series and then connected to a data acquisition channel of the multi-channel data collector, so as to improve the sensitivity of a specific frequency band.

9. Multi-channel seismic data frequency-expanded acquisition method, characterized in that, The multi-channel seismic data frequency-expanded acquisition method uses the multi-channel seismic data frequency-expanded acquisition device described in claim 1, and includes: Step 1, place a plurality of built-in geophones on the geophone installation skeleton and connect them to the multi-channel data collector; Step 2: After the multi-channel seismic data frequency extension acquisition device is powered on, the GNSS satellite timing and synchronization system receives satellite signals and calibrates and synchronizes the local clock system using the satellite clock system, thereby marking the accurately satellite time for the continuously recorded seismic data; Step 3: Under the control of the main controller, the multi-channel data collector collects data from multiple built-in geophones, groups and packages the data, and sends the data packets in a fixed format to the main controller; Step 4: The main controller transmits the data packets to the data storage for storage.

10. The multi-channel seismic data frequency extension acquisition method according to claim 9, wherein In Step 1, the connection method of multiple built-in geophones can be that each built-in geophone is connected to a data acquisition channel of the multi-channel data collector, or that the built-in geophones with specific frequencies are locally connected in series and then connected to a data acquisition channel of the multi-channel data collector, so as to improve the sensitivity of a specific frequency band.

11. The multi-channel seismic data frequency extension acquisition method according to claim 9, characterized in that In Step 1, the number of multiple built-in geophones used can be four or more, and the natural frequencies of multiple built-in geophones can be a combination of multiple types, which are selected and configured according to needs.

12. The multi-channel seismic data frequency extension acquisition method according to claim 9, characterized in that In Step 1, multiple built-in geophones are installed in various ways by matching different geophone mounting skeletons. They can all be vertical, all used to detect vertical vibration signals, or can be made in the form of orthogonal three components to collect seismic data in the XYZ three-axis directions, and can be expanded and extended according to actual usage requirements.

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