Real-time noise monitoring method and device for seismic exploration

Abstract

The invention belongs to the technical field of geophysical exploration, and particularly discloses a real-time noise monitoring method and device for seismic exploration. The device comprises a terminal control module, a wireless transmission module and a noise monitoring module, the noise monitoring module is in communication connection with the terminal control module through the wireless transmission module; the terminal control module calculates the minimum time interval for the noise monitoring module to send the data packet, and sends configuration information to the noise monitoring module; the noise monitoring module collects noise signals, performs root mean square value calculation according to a set window length, performs consistency analysis on continuous noise signals and various signal models to obtain a source type of noise, and transmits an analysis result of multi-channel noise collection to the terminal control module; and the terminal control module displays the analysis result sent by the noise monitoring module in real time. According to the invention, real-time noise monitoring and automatic determination of interference source types of the whole area can be realized, and excitation control determination or disaster early warning can be carried out.

Description

Technical Field

[0001] The invention belongs to the technical field of geophysical exploration, and in particular relates to a real-time noise monitoring method and device for seismic exploration. Background Art

[0002] With the rapid development of oil seismic exploration technology, the exploration area is extending to complex surfaces and complex oil and gas reservoirs. In order to solve the construction problems in complex exploration areas, node instruments came into being. Compared with wired instruments, node instruments have the characteristics of small size, light weight, and easy deployment. They have shown unique technical advantages in seismic exploration operations in complex areas, and have been vigorously promoted and applied on a large scale. However, node instruments also have disadvantages such as the inability to monitor the arrangement noise in real time. Therefore, during the construction process, it is necessary to realize the overall noise monitoring of the arrangement by laying out some wired instrument arrangements or other noise monitoring systems, and then control the excitation of the excitation source according to the real-time noise monitoring situation.

[0003] However, the existing node arrangement overall noise monitoring method also has many drawbacks, such as laying out wired instruments or multiple noise signal acquisition devices at different positions of the arrangement. This method is not only poor in feasibility, but also requires a lot of manpower and material resources; the process is to convert the collected analog noise signal into digital form and transmit it through communication media such as radio stations, and the terminal equipment decodes the received data and displays it according to the true value of the sample point. Although this method can obtain the real-time dynamic amplitude of the noise signal, due to the large amount of data, it is impossible to manage multiple noise signal acquisition devices at the same time and has extremely strict requirements on the transmission medium; and the judgment of the type of noise interference source collected is often based on human subjective conjecture, which is not conducive to the quality control of seismic exploration data collection. Summary of the invention

[0004] In order to solve the above deficiencies in the known technology, the present invention aims to provide a real-time noise monitoring device for seismic exploration, which can simultaneously use multiple noise signal acquisition devices to achieve real-time monitoring of noise in complex areas and automatic determination of interference source types.

[0005] Another object of the present invention is to provide a real-time noise monitoring method for seismic exploration, which needs to be implemented using the above-mentioned real-time noise monitoring device for seismic exploration. This method can more flexibly select a variety of communication media, can greatly reduce the amount of data transmission, and can obtain the type of noise interference source in real time, thereby improving the management ability of the noise signal acquisition device and the quality of the collected data.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] A real-time noise monitoring device for seismic exploration, comprising a terminal control module, a wireless transmission module and a noise monitoring module; the noise monitoring module is connected to the terminal control module through the wireless transmission module; the terminal control module calculates the minimum time interval for the noise monitoring module to send data packets, and sends configuration information to the noise monitoring module;

[0008] The noise monitoring module collects noise signals, calculates the root mean square value according to the window length of the set noise analysis time window, performs consistency analysis on the collected continuous noise signals and the stored multiple signal models to obtain the source type of the noise, and packages the analysis results of the multi-channel noise collection and transmits them to the terminal control module through the wireless transmission module;

[0009] The terminal control module displays the analysis results sent by the noise monitoring module in real time;

[0010] The noise monitoring module includes a noise receiving sensor and a noise collecting device, wherein the noise receiving sensor is connected to a data collecting channel of the noise collecting device; the terminal control module includes a terminal control device.

[0011] The present invention also discloses a real-time noise monitoring method for seismic exploration, which comprises the following steps performed in sequence:

[0012] S1. Write the signal model into the noise collection device, arrange the noise collection device according to the requirements of on-site noise monitoring, and connect the noise receiving sensor and the data collection channel of the noise collection device;

[0013] After the noise collection device is initialized, positioned, and the data collection channel status is monitored, the noise collection device enters a standby waiting state;

[0014] S2. The terminal control device calculates the minimum interval period for the noise collection device to send information according to the data communication mode, the number of noise collection devices, the data transmission bandwidth, and the size of the data packet, and calculates the maximum number of sample points that can be transmitted according to the minimum interval period and the information content in the data packet to obtain the noise analysis time window length;

[0015] S3, the terminal control device sends configuration information to the noise collection device through the wireless transmission module, wherein the configuration information includes the collection start time, the threshold value, the noise analysis window length and the minimum interval period;

[0016] S4, the noise collection device performs parameter configuration according to the received configuration information, and after the configuration is completed, the configuration result information and status information are sent to the terminal control device through the wireless transmission module;

[0017] S5. After receiving the configuration result information and status information sent by the noise collection device, the terminal control device checks the returned information;

[0018] If the states of the return information corresponding to all noise collection devices are all normal, the terminal control device sends the agreed GPS time to all noise collection devices to start the collection command; if there is an abnormality, for the noise collection device with abnormal return status, the execution starts again from step S3 until the states of the return information corresponding to all noise collection devices are normal, and the terminal control device sends the agreed GPS time to all noise collection devices to start the collection command;

[0019] Alternatively, for a noise collection device that returns a normal information status, the terminal control device first sends a collection command to the noise collection device that returns a normal information status; for a noise collection device that returns an abnormal information status, it is necessary to restart from step S3 until the return information status is normal, and then the terminal control device will send a collection command to start at the agreed GPS time;

[0020] S6. After receiving the start acquisition command, the noise acquisition device continuously acquires noise signals according to the acquisition start time, and calculates the root mean square value in sequence according to the set noise analysis time window length;

[0021] S7, comparing the RMS value with the set threshold value;

[0022] If the RMS value is less than the set threshold value, execute step S8;

[0023] If the RMS value is greater than the set threshold value, the noise signal source is obtained, and the noise signal source type is obtained according to the intelligent noise model automatic matching technology;

[0024] S8. The noise collection device sends the multiple channel data to the terminal control device, and the terminal control device performs excitation control judgment or disaster warning according to the received multiple channel data.

[0025] As a limitation, in step S6, the noise collection device obtains the noise analysis window length according to the set minimum interval period, divides the continuously collected signal according to the noise analysis window length, and calculates the root mean square value of the noise signal within the noise analysis window length.

[0026] As a second limitation, the acquisition of the noise signal source in step S7 starts from the root mean square value being higher than the threshold value, and the continuous noise signal in the noise analysis time window corresponding to the root mean square value higher than the threshold value is compared and analyzed for consistency with the written signal model through the intelligent noise model automatic matching technology.

[0027] As a third limitation, the multiple channel data in step S8 include basic header information, device number, number of channels for collecting data, GPS coordinate information, sending time, root mean square value, and noise signal source type of the data collection channel, and the multiple channel data are sent to the terminal control device in the form of one or more data packets.

[0028] As a fourth limitation, the method for the terminal control device to perform excitation control judgment or disaster warning in step S8 is: the terminal control device determines the interference source and the change of noise energy within the range based on the received multiple channel data, and dynamically displays the root mean square value in real time on the monitoring map.

[0029] As a further limitation, on the monitoring map, different colors are used to represent different amplitudes of the root mean square value.

[0030] As a fifth limitation, the intelligent noise model automatic matching technology compares the consistency of the collected noise signal with the stored multiple signal models, obtains the frequency spectrum of the collected noise signal and the stored multiple signal models by calculation, compares the degree of matching between the frequency spectrum of the collected noise signal and the frequency spectrum of the stored signal model, and obtains the type of noise signal.

[0031] As the sixth limitation, the formula for calculating the minimum interval period and the noise analysis window length is:

[0032] Minimum interval period = data transmission bandwidth / (number of noise collection devices*data packet size);

[0033] Noise analysis window length = minimum interval period / number of samples in the data packet.

[0034] Due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0035] (1) The device of the present invention has strong applicability. By deploying multiple noise collection devices in an area, noise monitoring of the entire area and automatic determination of the type of interference source can be achieved;

[0036] (2) The method of the present invention monitors the root mean square value of outdoor noise and determines the noise interference source in real time, thereby greatly reducing the amount of data transmission while achieving real-time monitoring of noise, improving the management capability of the noise signal acquisition device and the quality of the collected data, and providing data support for triggering control judgment or disaster warning;

[0037] (3) The method of the present invention has strong applicability and can be applied to any operating area such as plains, deserts, and Gobi, providing noise monitoring services for node instrument construction;

[0038] In summary, the present invention can realize real-time monitoring of outdoor noise and automatic determination of noise interference sources, and provide data support for triggering control judgment or disaster warning. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] Figure 1 This is a flow chart of a method for real-time monitoring of noise for seismic exploration according to Embodiment 2 of the present invention;

[0041] Figure 2 This is a schematic diagram of the arrangement position of the noise collection device in Example 2 of the present invention;

[0042] Figure 3 Spectrum comparison diagram of the noise signal and the heavy truck signal in Example 2 of the present invention. DETAILED DESCRIPTION

[0043] In order to better explain the present invention and facilitate understanding, the preferred embodiments of the present invention are described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0044] Embodiment 1 Real-time noise monitoring device for earthquake exploration

[0045] This embodiment includes a terminal control module, a wireless transmission module and a noise monitoring module; the noise monitoring module is connected to the terminal control module through the wireless transmission module; the terminal control module calculates the minimum time interval for the noise monitoring module to send a data packet, and sends configuration information to the noise acquisition module; wherein the configuration information includes the acquisition start time, the threshold value, the noise analysis time window length and the minimum interval period; the noise monitoring module collects noise signals, calculates the noise root mean square value according to the set window length of the noise analysis time window, performs consistency analysis on the collected noise signals and the stored multiple signal models to obtain the source type of the noise, and packages the analysis results of the multi-channel noise collection and transmits them to the terminal control module through the wireless transmission module; the terminal control module displays the analysis results sent by the noise monitoring module in real time.

[0046] The noise collection module includes a noise receiving sensor and a noise collection device, the noise receiving sensor is connected to the data collection channel of the noise collection device; the noise collection device includes a data collection unit, a data storage unit and a main control unit, and the terminal control module includes a terminal control device.

[0047] In this embodiment, the noise receiving sensor adopts a seismic detector; the data acquisition unit adopts a circuit with AD1282 as the core, the data storage unit adopts an SD card, and the main control unit adopts a circuit with FPGA chip as the core; the wireless transmission module is composed of a transmitter, a receiver and a controller; the terminal control module adopts an industrial tablet computer.

[0048] Example 2 Real-time noise monitoring method for seismic exploration

[0049] This embodiment provides a method for real-time monitoring of noise for seismic exploration, which needs to be implemented using the device in Example 1. Figure 2 As shown, in this embodiment, five noise collection devices are used, namely the first noise collection device to the fifth noise collection device, and the corresponding ID numbers are 1, 2, 3, 4, and 5. These five noise collection devices are sequentially arranged in different surface environments in the same area. Each noise collection device uses six data channels, each channel is connected to a seismic detector, and the seismic detector positions of two adjacent data channels corresponding to the same noise collection device are 20 meters apart.

[0050] like Figure 1 The flowchart of the real-time noise monitoring method for seismic exploration in this embodiment is shown. This embodiment includes the following steps performed in sequence:

[0051] S1. Place the first to fifth noise collection devices according to the needs of on-site noise monitoring. The six seismic detectors of the first noise collection device are placed along the gullies on the mountain. The six seismic detectors of the second and third noise collection devices are placed along the two ends of the highway in the area respectively; the six seismic detectors of the fourth noise collection device are placed in the central area of ​​the area; the six seismic detectors of the fifth noise collection device are placed on the regular surface of the area; connect the data collection channels of the seismic detectors and the noise collection devices.

[0052] After power-on, the noise collection device is initialized, positioned, and the data collection channel status is monitored. The noise collection device stores these status information, and enters a standby waiting state after the signal model is written into the noise collection device.

[0053] S2. The terminal control device calculates the minimum interval period for the noise collection device to send information according to the data communication mode, the number of noise collection devices, the data transmission bandwidth, and the size of the data packet, and calculates the maximum number of sample points that can be transmitted according to the minimum interval period and the content information in the data packet to obtain the noise analysis time window length; in this embodiment, the minimum interval period for the noise collection device to send information is 400ms; the information content in the data packet includes the size of the data packet and the number of sample points. Among them, the minimum interval period = data transmission bandwidth / (the number of noise collection devices * the size of the data packet); the noise analysis time window length = minimum interval period / the number of sample points in the data packet.

[0054] S3. The terminal control device sends configuration information to the noise collection device through the wireless transmission module. The configuration information includes the collection start time, threshold value, noise analysis window length and minimum interval period. In this embodiment, the threshold value set is 10uV, the noise analysis window length is 100ms, and the minimum interval period is 400ms.

[0055] S4. The noise collection device receives the configuration information and performs parameter configuration. After the configuration is completed, the configuration result information and status information are sent to the terminal control device through the 4G / 5G network, radio, WiFi, etc.; in this embodiment, the 4G network is used for data communication.

[0056] S5. After receiving the configuration result information and status information sent by the noise collection devices with ID numbers 1, 2, 3, 4, and 5, the terminal control device checks the returned information. If the status of the returned information corresponding to all noise collection devices is normal, the terminal control device sends the agreed GPS time to start the collection command for all noise collection devices; if there is an abnormality, for the noise collection device with an abnormal return status, the execution starts again from step S3 until the status of the returned information corresponding to all noise collection devices is normal, at which time the terminal control device sends the agreed GPS time to start the collection command for all noise collection devices.

[0057] Alternatively, for a noise collection device whose return information status is normal, the terminal control device first sends a collection command to the noise collection device whose return information status is normal; for a noise collection device whose return information status is abnormal, it is necessary to restart from step S3 until the return information status is normal, and then the terminal control device will send the agreed GPS time to start the collection command.

[0058] In this embodiment, it is found that the information returned by the noise collection device with ID 5 shows that the information sending time interval after configuration is 200ms, which is inconsistent with the command information sent by the terminal control device. Therefore, it is considered that its return status is abnormal, indicating that the parameter configuration has failed, and execution starts again from step S3.

[0059] For the noise collection devices with normal return status, the terminal control device sends them a command to start the collection at the agreed GPS time; the information returned by the noise collection devices with IDs 1, 2, 3, and 4 shows that their configured parameters are consistent with the command information sent by the terminal control device, and their own states such as satellite status lock and collection channel on and off are normal, then it is considered that their return status information is normal and the parameter configuration is successful, and the terminal control device sends them a command to start the collection at the agreed GPS time.

[0060] S6. After receiving the start acquisition command, the noise acquisition device continuously acquires noise signals according to the acquisition start time, and calculates the root mean square value in sequence according to the set noise analysis window length; the acquired signal is divided according to the length of the noise analysis window 100ms, and the root mean square value of the noise signal within the window length is calculated in sequence.

[0061] S7, comparing the RMS value with the set threshold value;

[0062] If the RMS value is less than the set threshold value, execute step S8;

[0063] If the RMS value is greater than the set threshold value, the noise signal source is acquired, starting from the time window data where the RMS value exceeds the standard, the continuous data is compared and analyzed for consistency with the stored signal model through the intelligent noise model automatic matching technology to obtain the type of noise signal source; until the RMS value is less than the set threshold value; the intelligent noise model automatic matching technology compares the consistency of the collected noise signal with the stored multiple signal models, obtains the frequency spectrum of the collected noise signal and the stored multiple signal models by calculation, and compares the matching degree of the frequency spectrum of the collected noise signal and the frequency spectrum of the stored signal model. If the consistency is greater than a certain value, the type of noise signal can be obtained.

[0064] In this embodiment, the noise collection device with ID number 2 has three data channels with the root mean square value of the noise signal collected exceeding 10uV. The continuous noise signals collected by these three data channels are compared and analyzed with the stored multiple signal models. The form is consistent with the signal form generated by the heavy truck, and it is determined that the noise signal comes from the interference of the heavy truck. At the same time, according to the root mean square value of the noise collected by the six data channels, the direction of the heavy truck can be inferred;

[0065] S8. The noise collection device sends data including basic header information, device number, number of channels for data collection, GPS coordinate information, sending time, root mean square value, and noise signal source type of the data collection channel to the terminal control device in the form of one or more data packets.

[0066] The terminal control device displays the update status in real time on the monitoring map according to the received data packets, displays the noise root mean square value in a dynamic bar graph, and uses different colors to represent different amplitudes; the noise collection device with ID 2 has three data channels that collect noise signals with root mean square values ​​exceeding 10uV and determines that the source type of the noise is a heavy truck, so the noise root mean square value is displayed in real time and dynamically in the form of a red bar graph on the monitoring map, and a truck icon is displayed at this location to indicate the type of noise interference source; the terminal control device determines the interference source within the range and the change in noise energy based on the noise information sent by the noise collection device, so as to make an excitation control judgment or disaster warning.

[0067] In addition to displaying the noise RMS value in a dynamic bar graph, it can also be displayed dynamically in other graphics such as a line graph. Figure 3 The figure shows a spectrum comparison diagram of a noise signal and a heavy truck signal. Curve a in the figure represents the spectrum of the heavy truck signal, and curve b represents the spectrum of the collected noise signal. By comparison, it is found that the spectrum of the collected noise signal is consistent with the spectrum of the stored heavy truck. It can be known that the collected noise signal is the signal generated by the heavy truck.

Claims

1. A real-time noise monitoring device for seismic exploration, characterized in that: It includes a terminal control module, a wireless transmission module and a noise monitoring module; the noise monitoring module is connected to the terminal control module through the wireless transmission module; the terminal control module calculates the minimum time interval for the noise monitoring module to send data packets and sends configuration information to the noise monitoring module; The noise monitoring module collects noise signals, calculates the root mean square value according to the window length of the set noise analysis time window, performs consistency analysis on the collected continuous noise signals and the stored multiple signal models to obtain the source type of the noise, and packages the analysis results of the multi-channel noise collection and transmits them to the terminal control module through the wireless transmission module; The terminal control module displays the analysis results sent by the noise monitoring module in real time; The noise monitoring module includes a noise receiving sensor and a noise collecting device, wherein the noise receiving sensor is connected to a data collecting channel of the noise collecting device; the terminal control module includes a terminal control device.

2. A method for real-time monitoring of noise for seismic exploration, implemented by using the device for real-time monitoring of noise for seismic exploration according to claim 1, characterized in that: The method comprises the following steps performed in sequence: S1. Write the signal model into the noise collection device, arrange the noise collection device according to the requirements of on-site noise monitoring, and connect the noise receiving sensor and the data collection channel of the noise collection device; After the noise collection device is initialized, positioned, and the data collection channel status is monitored, the noise collection device enters a standby waiting state; S2. The terminal control device calculates the minimum interval period for the noise collection device to send information according to the data communication mode, the number of noise collection devices, the data transmission bandwidth, and the size of the data packet, and calculates the maximum number of sample points that can be transmitted according to the minimum interval period and the information content in the data packet to obtain the noise analysis time window length; S3, the terminal control device sends configuration information to the noise collection device through the wireless transmission module, wherein the configuration information includes the collection start time, the threshold value, the noise analysis window length and the minimum interval period; S4, the noise collection device performs parameter configuration according to the received configuration information, and after the configuration is completed, the configuration result information and status information are sent to the terminal control device through the wireless transmission module; S5. After receiving the configuration result information and status information sent by the noise collection device, the terminal control device checks the returned information; If the status of the return information corresponding to all noise collection devices is normal, the terminal control device sends a command to start the collection at the agreed GPS time to all noise collection devices; If there is an abnormality, for the noise collection device with abnormal return status, the process starts again from step S3 until the status of the return information corresponding to all noise collection devices is normal, and the terminal control device sends a command to start the collection at the agreed GPS time to all noise collection devices; Or for the noise collection device that returns a normal information status, the terminal control device first sends a collection command to the noise collection device that returns a normal information status; For the noise collection device whose returned information status is abnormal, it is necessary to restart from step S3 until the returned information status is normal, and then the terminal control device will send the agreed GPS time to start the collection command; S6. After receiving the start acquisition command, the noise acquisition device continuously acquires noise signals according to the acquisition start time, and calculates the root mean square value in sequence according to the set noise analysis time window length; S7, comparing the RMS value with the set threshold value; If the RMS value is less than the set threshold value, execute step S8; If the RMS value is greater than the set threshold value, the noise signal source is obtained, and the noise signal source type is obtained according to the intelligent noise model automatic matching technology; S8. The noise collection device sends the multiple channel data to the terminal control device, and the terminal control device performs excitation control judgment or disaster warning according to the received multiple channel data.

3. The real-time noise monitoring method for seismic exploration according to claim 2, characterized in that: In step S6, the noise collection device obtains the noise analysis window length according to the set minimum interval period, divides the continuously collected signal according to the noise analysis window length, and calculates the root mean square value of the noise signal within the noise analysis window length.

4. The real-time noise monitoring method for seismic exploration according to claim 2 or 3, characterized in that: The acquisition of the noise signal source in step S7 starts from when the RMS value is higher than the threshold value, and the continuous noise signal in the noise analysis time window corresponding to the RMS value higher than the threshold value is compared and analyzed for consistency with the written signal model through the intelligent noise model automatic matching technology.

5. The real-time noise monitoring method for seismic exploration according to claim 2 or 3, characterized in that: The multiple channel data in step S8 include basic header information, device number, number of channels for collecting data, GPS coordinate information, sending time, root mean square value, and noise signal source type of the data collection channel, and the multiple channel data are sent to the terminal control device in the form of one or more data packets.

6. The real-time noise monitoring method for seismic exploration according to claim 2 or 3, characterized in that: The method for the terminal control device to perform excitation control judgment or disaster warning in step S8 is: the terminal control device determines the interference source and noise energy changes within the range based on the received multiple channel data, and dynamically displays the root mean square value in real time on the monitoring map.

7. The real-time noise monitoring method for seismic exploration according to claim 6, characterized in that: On the monitoring map, different colors are used to represent different amplitudes of the root mean square value.

8. The real-time noise monitoring method for seismic exploration according to claim 4, characterized in that: The intelligent noise model automatic matching technology compares the consistency of the collected noise signal with the stored multiple signal models, obtains the frequency spectra of the collected noise signal and the stored multiple signal models by calculation, compares the matching degree of the frequency spectrum of the collected noise signal with the frequency spectrum of the stored signal model, and obtains the type of the noise signal.

9. The real-time noise monitoring method for seismic exploration according to claim 2, characterized in that: The calculation formula for the minimum interval period and the noise analysis window length is: Minimum interval period = data transmission bandwidth / (number of noise collection devices*data packet size); Noise analysis window length = minimum interval period / number of samples in the data packet.

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