A method for generating continuous gathers after multiple deployment and recovery of marine nodes

Abstract

The present invention belongs to the field of geophysical exploration technology, and discloses a method for generating continuous gathers after multiple deployment and recovery of ocean nodes. The method sets the start and end time for each deployment and recovery area, and then performs relationship mapping according to the position information of the deployed ocean nodes, and finally generates continuous gathers for the data of the ocean nodes in the segment according to the mapped position information. The method realizes the one-time completion of data download after multiple deployment and recovery of ocean nodes, which is highly efficient and reduces manpower consumption; by sequentially performing segmented mapping operations on multiple ocean node deployment areas, the continuous gather generation task of multiple deployments of all ocean nodes in multiple areas to collect data is finally completed, which solves the problem of data duplication caused when downloading data uniformly after multiple deployments, and ensures the correctness of seismic data; the present invention is used to realize the continuous gather generation processing of ocean node acquisition data.

Description

Technical Field

[0001] The invention belongs to the technical field of geophysical exploration, and in particular is a method for generating continuous gathers after multiple deployment and recovery of ocean nodes. Background Art

[0002] Marine exploration is a new direction for future energy development. Marine nodes are multi-component seismographs that can independently collect and record seismic signals. Marine seismic marine nodes are a specific application of marine nodes, mainly used for seismic exploration. Marine seismic marine nodes record seismic signals excited in seawater through marine nodes deployed on the seabed, thereby obtaining multi-azimuth and multi-offset seismic data sets, providing a reliable solution for increasing reserves and production of oil and gas fields and improving the imaging accuracy of marine oil and gas reservoirs, and have broad development prospects.

[0003] Normally, the ocean nodes are placed on the seabed and retrieved after a week, a month, or even a few months. After the retrieval, the data collected in the area is downloaded, and then continuous gather generation processing is performed. After the data download is completed, the ocean node is placed in the next location. The data download operation process is: connect the ocean node to the cabinet, and then use the ocean node management software to download. When connecting the ocean node, you need to open the protective cap and clean it. After the download is complete, you need to clear the data, unplug the cabinet, and finally install the protective cap before deploying it again. The above method requires a data download every time the ocean node is retrieved. The whole process consumes a lot of manpower and is inefficient.

[0004] Then, the method of downloading data uniformly after multiple deployments at different locations is adopted. For example, the marine node is deployed at location A for one week and then retrieved, and deployed directly at location B. After a period of time, it is retrieved and deployed at location C. After being retrieved from location C, the data collected at all locations are downloaded uniformly. Compared with the above method, this method downloads data once after three deployments and retrievals, which reduces the number of data downloads, saves time, and reduces manpower consumption. However, when the data is retrieved after multiple deployments, when generating continuous gathers for the data deployed at different times, all the collected data of the marine node must be generated continuously each time according to the mapping relationship of that time, so that there will be multiple repeated generation. Summary of the invention

[0005] The present invention aims to provide a method for generating continuous gathers after multiple deployment and recovery of marine nodes, so as to solve the problems of low efficiency and high manpower consumption caused by downloading data immediately after single deployment and recovery of marine nodes in the prior art, as well as the problem of data duplication caused by unified downloading of data after multiple deployments.

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

[0007] A method for generating continuous gathers after multiple deployment and recovery of marine nodes, the method comprising the following steps:

[0008] S1. Ocean node starts collection;

[0009] S2. Record the deployment and recovery time of the ocean nodes;

[0010] S3. Record the location information of the marine node deployment and generate a mapping relationship between the deployment of marine nodes and the location information;

[0011] S4. Data download;

[0012] S5. Data segmentation: segment the ocean node data according to the number of deployments;

[0013] S6. Set the start and end time for each segment; within each segment, the deployment time of the ocean node is the start time of the segment, and the recovery time is the end time of the segment;

[0014] S7. Perform relationship mapping on the ocean nodes in each segment interval;

[0015] According to the segmentation situation, the mapping relationship generated by the deployment is used to map the relationship of the ocean nodes in each segment interval to map the location information of the ocean nodes;

[0016] S8. Continuous gather generation;

[0017] According to the start and end times and mapping relationships in different segments, continuous gather generation is performed on the data in each segment.

[0018] As a limitation of the present invention: when the same ocean node is deployed and recovered multiple times in step S2, the deployment time of the ocean node is recorded each time the ocean node is deployed, and the recovery time of the ocean node is recorded each time the ocean node is recovered, until the last recovery of the ocean node is completed.

[0019] As a further limitation of the present invention: when the same ocean node is deployed and recovered multiple times in step S3, the location information of the deployed ocean node is recorded each time the ocean node is deployed, and a mapping relationship between the deployed ocean node and the location information is generated. Multiple deployments are recorded in this way until the last deployment is completed.

[0020] As a further limitation of the present invention: after the last recovery of the ocean nodes is completed in step S4, the data collected by the ocean nodes are downloaded.

[0021] As a further limitation of the present invention: the continuous gather file header generated in step S8 records the location information of the deployment of the ocean nodes.

[0022] As another limitation of the present invention: when the same marine node is deployed and recovered multiple times, it is determined in step S4 whether to download data. If yes, the data is downloaded and steps S5-S8 are performed in sequence; if not, steps S1-S4 are repeated.

[0023] As a further limitation of the present invention: it also includes S9. judging whether all segment processing is completed, if yes, ending the task, if not, repeating S6-S9.

[0024] Due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0025] The present invention provides a method for generating continuous gathers after multiple deployment and recovery of marine nodes. The method sets the start and end time for each deployment and recovery area, and then performs relationship mapping based on the location information of the marine nodes when deployed in a certain area. Finally, the data of the marine nodes in the segment are continuously generated according to the mapped location information. The method realizes the one-time completion of data download after multiple deployment and recovery of marine nodes, without downloading data once after each deployment and recovery, which is highly efficient and reduces manpower consumption.

[0026] By sequentially performing segmented mapping operations on the deployment areas of multiple marine nodes, the continuous gather generation task of collecting data by multiple deployments of all marine nodes in multiple areas is finally completed, solving the problem of data duplication caused by unified downloading of data after multiple deployments, and ensuring the accuracy of seismic data;

[0027] In addition, this method only performs mapping operations on areas where marine nodes are deployed. When generating continuous gathers, continuous gathers are only generated for data in mapped segments. This can skip invalid data in the front, back and middle segments, save processing time and improve the efficiency of construction operations.

[0028] In summary, the present invention can complete data download in one time after multiple deployment and recovery of marine nodes, which is highly efficient and reduces manpower consumption; it can also avoid the problem of data duplication when downloading data uniformly, ensuring the correctness of seismic data; it can also save processing time and improve construction efficiency; the present invention is used to realize continuous gather generation and processing of marine node acquisition data. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Figure 1 This is a schematic diagram of three deployments and recovery of marine nodes in an embodiment of the present invention;

[0031] Figure 2 The figure is a flow chart of a method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0032] It should be understood that the method for generating continuous gathers after multiple deployment and recovery of marine nodes described herein is a preferred embodiment, which is only used to illustrate and explain the present invention and does not constitute a limitation of the present invention.

[0033] like Figure 1-2 As shown, this embodiment is described by taking three deployments and three recovery of the same ocean node as an example.

[0034] This embodiment includes the following steps:

[0035] S1. The ocean node starts collecting data.

[0036] S2. Record the deployment and recovery time of the ocean nodes.

[0037] When the same ocean node is deployed and recovered multiple times, the deployment time of the ocean node is recorded each time the ocean node is deployed, and the recovery time of the ocean node is recorded each time the ocean node is recovered, until the last recovery of the ocean node.

[0038] like Figure 1 As shown, in this embodiment, the same ocean node is deployed in the first area, the second area, and the third area successively. Figure 1 The start time refers to the deployment time in the corresponding area, and the end time refers to the recovery time in the corresponding area.

[0039] S3. Record the location information of the deployed ocean nodes and generate a mapping relationship between the deployed ocean nodes and the location information.

[0040] like Figure 1 , 2 As shown, when the same ocean node is deployed and recovered multiple times, the location information of the deployed ocean node is recorded each time the ocean node is deployed, and a mapping relationship between the deployed ocean node and the location information is generated. Multiple deployments are recorded in this way until the last deployment.

[0041] The specific application steps of steps S2 and S3 in this embodiment are:

[0042] Deploy nodes for the first time; record the time of the first deployment, record the position of the first deployment, and generate a mapping relationship; recycle nodes and record the time of the first recycle.

[0043] Deploy nodes for the second time; record the time of the second deployment, record the position of the second deployment, and generate a mapping relationship; recycle nodes and record the time of the second recycle.

[0044] Deploy nodes for the third time; record the time and position of the third deployment, and generate a mapping relationship; recycle nodes and record the time of the third recycle.

[0045] It should be noted that in the construction of marine nodes, the mapping relationship between the node pile number and the node ID number is matched one by one by using RFID equipment to scan the electronic tags built into the nodes when the nodes are deployed. The mapping method is mentioned in the article "Design and Application of oSeis Marine Seismic Node Software System" published by this research and development team in Volume 32, Issue 5, October 2022 of "Geophysical Prospecting Equipment". This part of the content is prior art, so the generation of the mapping relationship will not be described in detail in this embodiment.

[0046] S4. Data download.

[0047] After the last (i.e., the third) ocean node recovery is completed, download the data collected by the ocean node.

[0048] It should be noted that in this step, it is necessary to determine whether to download data. If yes, download the data and proceed to steps S5-S8. If no, repeat steps S1-S4.

[0049] For example, when the ocean node is recovered from the first area, it is determined whether the data is downloaded. If not, the ocean node is directly deployed in the second area, and steps S1-S4 are repeated until the ocean node is finally recovered from the third area and the data is confirmed to be downloaded.

[0050] S5. Data segmentation.

[0051] The marine node data is segmented according to the number of deployments, and the number of segment intervals is set for downloading data. In this embodiment, the number of segment intervals is three.

[0052] S6. Set the start and end time for each segment.

[0053] In each segmented interval, the deployment time of the ocean node is the start time of the segment, and the recovery time is the end time of the segment. In this embodiment, there are three segmented intervals, three deployment times and three recovery times.

[0054] S7. Perform relationship mapping on the ocean nodes in each segment interval.

[0055] According to the segmentation situation, the mapping relationship generated by the deployment is used to map the relationship of the ocean nodes in each segment interval to map the location information of the ocean nodes;

[0056] S8. Continuous gather generation;

[0057] According to the start and end times and mapping relationships in different segments, continuous gathers are generated for the data in each segment.

[0058] The continuous gather file converts the original data file recorded in the marine node into the SEG standard format file, and records the relevant information of the node in the file header, including the deployed stake number, location coordinates, etc. Therefore, the location information of the marine node deployment is recorded in the header of the continuous gather file generated in this step.

[0059] In this embodiment, the specific operations of steps S5-S8 are:

[0060] Set the start and end times for the first segment interval; perform relationship mapping for the nodes in the first segment interval; and generate continuous gathers for the first segment node according to the start and end times and the mapping relationship.

[0061] Set the start and end times for the second segment interval; perform relationship mapping for the nodes in the second segment interval; and generate continuous gathers for the second segment nodes according to the start and end times and the mapping relationship.

[0062] Set the start and end times for the third segmented interval; perform relationship mapping for the nodes in the third segmented interval; and generate continuous gathers for the third segmented nodes according to the start and end times and the mapping relationship.

[0063] This embodiment also includes step S9. Determine whether all segment processing is completed. If yes, end the task. If no, repeat S6-S9. Figure 2 .

[0064] Since the number of nodes in marine seismic exploration ranges from thousands to tens of thousands, and the acquisition time is long (usually 1-4 months), the efficiency of data processing is very high. The present invention provides a method for mapping the data collected after multiple deployment and recovery of marine nodes according to time periods, setting the start time and end time for each deployed area, and then mapping the relationship according to the location information of the deployed marine nodes in a certain area, and finally generating continuous data sets for the data of the marine nodes in the segment according to the mapped location information, realizing the download of data after multiple deployment and recovery of marine nodes at one time, without downloading data once after each deployment and recovery, with high efficiency and reduced manpower consumption.

[0065] This method performs segmented mapping operations on multiple marine node deployment areas in sequence, and finally completes the task of generating continuous gathers for all marine nodes deployed multiple times in multiple areas to collect data. This solves the problem of data duplication caused by unified downloading of data after multiple deployments, and ensures the accuracy of seismic data.

[0066] This method only performs mapping operations on areas where marine nodes are deployed. When generating continuous gathers, continuous gathers are only generated for data in mapped segments. This can skip invalid data in the front, back and middle segments, save processing time and improve the efficiency of construction operations.

[0067] It should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiment, those skilled in the art can still modify the technical solutions described in the above embodiment or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for generating continuous gathers after multiple deployment and recovery of marine nodes, characterized in that: The method comprises the following steps: S1. Ocean node starts collection; S2. Record the deployment and recovery time of the ocean nodes; S3. Record the location information of the marine node deployment and generate a mapping relationship between the deployment of marine nodes and the location information; S4. Data download; S5. Data segmentation: segment the ocean node data according to the number of deployments; S6. Set the start and end time for each segment; within each segment, the deployment time of the ocean node is the start time of the segment, and the recovery time is the end time of the segment; S7. Perform relationship mapping on the ocean nodes in each segment interval; According to the segmentation situation, the mapping relationship generated by the deployment is used to map the relationship of the ocean nodes in each segment interval to map the location information of the ocean nodes; S8. Generation of continuous gathers; According to the start and end times and mapping relationships in different segments, continuous gather generation is performed on the data in each segment.

2. The method for generating continuous gathers after multiple deployment and recovery of marine nodes according to claim 1, characterized in that: When the same ocean node is deployed and recovered multiple times in step S2, the deployment time of the ocean node is recorded each time the ocean node is deployed, and the recovery time of the ocean node is recorded each time the ocean node is recovered, until the last recovery of the ocean node is completed.

3. The method for generating continuous gathers after multiple deployment and recovery of marine nodes according to claim 2, characterized in that: When the same ocean node is deployed and recovered multiple times in step S3, the location information of the deployed ocean node is recorded each time the ocean node is deployed, and a mapping relationship between the deployed ocean node and the location information is generated. Multiple deployments are recorded in this way until the last deployment is completed.

4. The method for generating continuous gathers after multiple deployment and recovery of marine nodes according to claim 3, characterized in that: In step S4, after the last ocean node recovery is completed, the data collected by the ocean node is downloaded.

5. The method for generating continuous gathers after multiple deployment and recovery of marine nodes according to claim 4, characterized in that: The continuous gather file header generated in step S8 records the location information of the ocean node deployment.

6. The method for generating continuous gathers after multiple deployment and recovery of marine nodes according to any one of claims 1 to 5, characterized in that: When the same marine node is deployed and recovered multiple times, it is determined in step S4 whether to download data. If yes, the data is downloaded and steps S5-S8 are performed in sequence; if no, steps S1-S4 are repeated.

7. The method for generating continuous gathers after multiple deployment and recovery of marine nodes according to claim 6, characterized in that: It also includes S9. Determine whether all segment processing is completed. If yes, end the task; if not, repeat S6-S9.

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