Method and device for determining geological characteristic information based on underground geological response

Abstract

The present invention discloses a method and device for determining geological characteristic information based on underground geological responses. The method comprises: obtaining a shot gather domain under the same excitation signal according to the desired geological characteristic information, wherein the shot gather domain includes seismic data under multiple paths; separating the seismic data under the multiple paths to obtain seismic data for each path, wherein the seismic data includes acquisition parameters of the seismic data; transforming the seismic data for the same path to obtain stress and strain fields when near-field wavelets are determined; substituting the stress and strain fields into the Hooke equation based on the minimum number of mutually uncorrelated vertical observations to obtain the required rock physical parameters of the target; and determining the geological characteristic information of the medium to be identified based on the required rock physical parameters of the target. The present invention can accurately determine geological characteristic information and improve the reliability of geological characteristic information.

Description

Technical Field

[0001] The present invention relates to the field of geophysical exploration technology, and in particular to a method and device for determining geological characteristic information based on underground geological responses. Background Art

[0002] This section is intended to provide a background or context to the embodiments of the invention that are recited in the claims.

[0003] With the diversification of mineral resource exploration targets, the scope of geophysical exploration is continuously expanding. Oil and gas exploration has also shifted from primarily structural exploration to the identification of hidden geological bodies such as lithologies and fractures, posing significant challenges to seismic exploration. Seismic data acquisition parameters were originally designed based on signal-to-noise ratio, excitation wavelet frequency band, and imaging requirements. Signal fidelity was limited to studies of geophone placement and excitation wavelet morphology. Conventional seismic exploration based on horizontal stacking focuses on the response of the reflection coefficient to the seismic excitation signal. Therefore, attributes such as wave group characteristics and events are used to locate the location of this response and thus identify geological features. These attributes are easily identified and utilized in seismic signals. These attributes are characterized by spatially scrolling, achieving multiple observations of the same point from different directions and paths. Seismic data from different sources are then projected onto a common reflection point for stacking and imaging. This imaging method targets the reflected seismic wavelet signal. However, because the imaging result is a superposition of data from different paths, the differences in responses between paths are largely blurred, making it difficult to ensure the accuracy and reliability of geological features. Summary of the Invention

[0004] An embodiment of the present invention provides a method for determining geological characteristic information based on underground geological responses, for accurately determining geological characteristic information and improving the reliability of geological characteristic information. The method includes:

[0005] Acquire a shot gather domain under the same excitation signal according to required geological feature information, wherein the shot gather domain includes seismic data under multiple paths;

[0006] Separating the seismic data under the multiple paths to obtain seismic data of the respective paths, wherein the seismic data includes acquisition parameters of the seismic data;

[0007] When the near-field wavelet is determined, the seismic data of the same path are transformed to obtain stress and strain fields;

[0008] Substituting the stress and strain fields into the Hooke equation based on the minimum number of mutually uncorrelated vertical observations to obtain the required rock physical parameters of the target; the minimum number of mutually uncorrelated vertical observations is determined based on the number of required rock physical parameters in the geological medium to be identified, and the required rock physical parameters are determined based on the geological characteristic information of the medium to be identified based on the Hooke equation; the mutually uncorrelated vertical observations refer to excitation observations performed at the same excitation point using mutually uncorrelated excitation signals;

[0009] Determine the geological characteristic information of the medium to be identified based on the rock physical parameters required by the target.

[0010] An embodiment of the present invention further provides a device for determining geological characteristic information based on underground geological responses, for accurately determining geological characteristic information and improving the reliability of geological characteristic information. The device includes:

[0011] A shot gather domain acquisition module is used to acquire a shot gather domain under the same excitation signal according to required geological information, wherein the shot gather domain includes seismic data under multiple paths;

[0012] A seismic data acquisition module is used to separate the seismic data under multiple paths to obtain seismic data of each path, wherein the seismic data includes acquisition parameters of the seismic data;

[0013] The stress and strain field determination module is used to transform the seismic data of the same path to obtain the stress and strain fields when the near-field wavelet is determined;

[0014] A rock physical parameter determination module is configured to substitute stress and strain fields into the Hooke equation to solve the required rock physical parameters based on a minimum number of mutually uncorrelated vertical observations. The minimum number of mutually uncorrelated vertical observations is determined based on the number of required rock physical parameters in the geological medium to be identified, where the required rock physical parameters are determined based on the geological characteristic information of the medium to be identified based on the Hooke equation. The mutually uncorrelated vertical observations refer to excitation observations performed at the same excitation point using mutually uncorrelated excitation signals.

[0015] The geological characteristic information determination module is used to determine the geological characteristic information of the medium to be identified based on the rock physical parameters required by the target.

[0016] An embodiment of the present invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the method for determining geological characteristic information based on underground geological response is implemented.

[0017] An embodiment of the present invention further provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the method for determining geological characteristic information based on underground geological response is implemented.

[0018] An embodiment of the present invention further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, it implements the above-mentioned method for determining geological characteristic information based on underground geological response.

[0019] In an embodiment of the present invention, a shot gather domain under the same excitation signal is obtained according to required geological characteristic information, and the shot gather domain includes seismic data under multiple paths; the seismic data under the multiple paths are separated to obtain seismic data of each path, and the seismic data includes acquisition parameters of the seismic data; when the near-field wavelet is determined, the seismic data of the same path are transformed to obtain stress and strain fields; according to the minimum number of mutually uncorrelated vertical observations, the stress and strain fields are substituted into the Hooke's equation to solve and obtain the rock physical parameters required for the target; the minimum number of mutually uncorrelated vertical observations is determined according to the number of rock physical parameters required in the geological medium to be identified, and the required rock physical parameters are determined according to the geological characteristic information of the medium to be identified according to the Hooke's equation; the mutually uncorrelated vertical observations refer to excitation observations performed at the same excitation point using mutually uncorrelated excitation signals; according to the rock physical parameters required by the target, the geological characteristic information is accurately determined, and the reliability of the geological information is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0021] Figure 1 Flowchart of a method for determining geological characteristic information based on underground geological responses in an embodiment of the present invention;

[0022] Figure 2 is a propagation path diagram based on the ray principle in an embodiment of the present invention;

[0023] Figure 3 is a feature graph of data in the shot gather domain in an embodiment of the present invention;

[0024] Figure 4 This is a design diagram of the coincidence of vertical observation points and horizontal observation points in an embodiment of the present invention;

[0025] Figure 5Schematic diagram of a device for determining geological characteristic information based on underground geological responses in an embodiment of the present invention. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0027] Figure 1 Flowchart of a method for determining geological characteristic information based on underground geological responses according to an embodiment of the present invention. The method includes:

[0028] Step 101, obtaining a shot gather domain under the same excitation signal according to required geological feature information, wherein the shot gather domain includes seismic data under multiple paths;

[0029] Step 102, separating the seismic data under the multiple paths to obtain seismic data of the respective paths, wherein the seismic data includes acquisition parameters of the seismic data;

[0030] Step 103: When the near-field wavelet is determined, the seismic data of the same path are transformed to obtain stress and strain fields;

[0031] Step 104: Substitute the stress and strain fields into the Hooke's equation based on the minimum number of mutually uncorrelated vertical observations to obtain the target rock physical parameters. The minimum number of mutually uncorrelated vertical observations is determined based on the number of required rock physical parameters in the geological medium to be identified. The required rock physical parameters are determined based on the geological characteristic information of the medium to be identified based on the Hooke's equation. The mutually uncorrelated vertical observations refer to excitation observations performed at the same excitation point using mutually uncorrelated excitation signals.

[0032] Step 105: Determine the geological characteristic information of the medium to be identified based on the required rock physical parameters.

[0033] Each step is described in detail below.

[0034] In step 101, a shot gather domain under the same excitation signal is acquired according to required geological characteristic information, wherein the shot gather domain includes seismic data under multiple paths.

[0035] In a specific embodiment, Figure 2 As shown in the figure, when the same point is excited and the receiving point remains unchanged, the path from each receiving point to the shot point in the shot gather domain is unique. Therefore, a shot gather domain with the same excitation signal from the same observation point is selected (a data set with different detection points of the same shot point arranged in ascending order of distance from the shot point) and processed as the input data for solving the Hooke equation.

[0036] In one embodiment, after obtaining the shot gather domain under the same excitation signal, the method further includes:

[0037] Determine the location and scale of horizontal observation points based on the positioning information and separation requirements of each path;

[0038] Determine the acquisition parameters of seismic data based on the location and scale of the horizontal observation points.

[0039] In a specific embodiment, the process of designing the position of the horizontal observation point is as follows:

[0040] According to the basic requirements for velocity modeling and imaging in horizontal observation, conventional (not high-density) acquisition parameter design is carried out to form an observation grid. If the vertical grid can meet the requirements, the horizontal observation grid is the vertical observation grid. If the horizontal observation grid density is high, it is supplemented on the basis of the vertical observation grid until the requirements of the horizontal observation point position are met.

[0041] In step 102, seismic data under multiple paths are separated to obtain seismic data of respective paths, wherein the seismic data includes acquisition parameters of the seismic data.

[0042] In a specific embodiment, Figure 3 The characteristics of the data in the shot gather domain are shown. It records a mixture of various wave fields. Therefore, it is necessary to separate the various wave fields. After separation, each data in the gather is transformed into stress and strain when the near-field wavelet is determined. Multiple independent vertical observations are used to meet the conditions for the rock physical parameter solution in the Hooke equation on the same path.

[0043] In step 103, when the near-field wavelet is determined, the seismic data of the same path are transformed to obtain stress and strain fields.

[0044] In one embodiment, the relationship between stress and strain fields is as follows:

[0045] σ ij =C ijkl ε kl ;

[0046] Among them, C ijkl is a fourth-order tensor representing the elastic coefficient matrix; σ ij is a second-order tensor representing stress; ε kl It is a second-order tensor representing strain; i represents the stress acting on the i surface, j represents the projection of the stress in the direction of the coordinate plane corresponding to j, k represents the strain on the k surface, and l represents the projection of the strain in the direction of the coordinate plane corresponding to l.

[0047] In step 104, based on the minimum number of mutually uncorrelated vertical observations, the stress and strain fields are substituted into the Hooke's equation to solve for the target rock physical parameters. The minimum number of mutually uncorrelated vertical observations is determined based on the number of rock physical parameters required in the geological medium to be identified, and the required rock physical parameters are determined based on the geological characteristic information of the medium to be identified based on the Hooke's equation. The mutually uncorrelated vertical observations refer to excitation observations performed at the same excitation point using mutually uncorrelated excitation signals.

[0048] In a specific embodiment, Figure 4 As shown in the figure, the vertical observation layout based on the first minimum number of vertical observations is designed with the maximum grid that can continuously track all target layers. The layout is based on the structural complexity, structural morphology, distribution, and the signal-to-noise ratio and accuracy requirements of the solution of the Hooke equation as the most basic conditions. The maximum grid can be uneven, which can realize the evaluation and determination of the vertical observation grid points.

[0049] In a specific embodiment, for seismic exploration, the artificial source excitation signal is equivalent to inputting a force on the earth. This force causes the earth to deform. In the case of small displacements, it meets the assumption that the earth is an elastic body. According to the Hooke equation, the relationship between stress and strain determines a fourth-order tensor that can calibrate the rock properties. If the collected data can be transformed into the stress and strain domain, this fourth-order tensor describing the rock properties can be obtained, thereby identifying and calibrating the properties of the corresponding rock. The most complex medium requires 36 parameters in the equation. According to the conditions for solving the linear equation system, at least 36 mutually unrelated observations are required to obtain it. However, general media are not that complex and are all locally uniform. The most common media are TTI and VTI media. The following equations are obtained through the media:

[0050]

[0051] To obtain rock physical parameters from this equation, at least nine sets of independent excitation (stress) and reception (strain) observations are required. Therefore, the number of vertical observations should be greater than the basic requirement for solving the above equation, so that the observation data meet the requirements for obtaining rock physical parameters from the Hooke equation.

[0052] In step 105, geological characteristic information of the medium to be identified is determined based on the target rock physical parameters.

[0053] In one embodiment, after determining the geological characteristic information of the medium to be identified based on the required rock physical parameters, the method further includes:

[0054] comparing the signal-to-noise ratio corresponding to the geological characteristic information with the signal-to-noise ratio of historical seismic data;

[0055] The minimum number of mutually uncorrelated vertical observations required for the final observation is determined based on the criterion that the comparison result meets the preset conditions. The minimum number of mutually uncorrelated vertical observations required for the final observation is used to determine the minimum number of mutually uncorrelated vertical observations required for the comparison result to meet the preset conditions.

[0056] In a specific embodiment, the geological information obtained by solving the Hooke equation can also be compared with the horizontal stacking data or logging data of historical seismic data, and finally the second minimum number of vertical observations can be determined based on the standard of meeting the recognition of geological information characteristics.

[0057] The present invention also provides a device for determining geological characteristic information based on underground geological response in an embodiment, as described in the following embodiment. Since the principle of solving the problem of the device is similar to that of the method for determining geological characteristic information based on underground geological response, the implementation of the device can refer to the implementation of the method for determining geological characteristic information based on underground geological response, and the repeated parts will not be repeated. Figure 5 As shown, the device includes:

[0058] A shot gather domain acquisition module 501 is used to acquire a shot gather domain under the same excitation signal according to required geological information, wherein the shot gather domain includes seismic data under multiple paths;

[0059] A seismic data acquisition module 502 is configured to separate seismic data from multiple paths to obtain seismic data for each path, wherein the seismic data includes acquisition parameters of the seismic data;

[0060] The stress and strain field determination module 503 is used to transform the seismic data of the same path to obtain stress and strain fields when the near-field wavelet is determined;

[0061] The rock physical parameter determination module 504 is configured to substitute the stress and strain fields into the Hooke's equation to obtain the target rock physical parameters based on the minimum number of mutually uncorrelated vertical observations. The minimum number of mutually uncorrelated vertical observations is determined based on the number of required rock physical parameters in the geological medium to be identified. The required rock physical parameters are determined based on the geological characteristic information of the medium to be identified based on the Hooke's equation. The mutually uncorrelated vertical observations refer to excitation observations performed at the same excitation point using mutually uncorrelated excitation signals.

[0062] The geological characteristic information determination module 505 is used to determine the geological characteristic information of the medium to be identified based on the rock physical parameters required by the target.

[0063] In one embodiment, an acquisition parameter determination module is further included, specifically configured to:

[0064] Determine the location and scale of horizontal observation points based on the positioning information and separation requirements of each path;

[0065] Determine the acquisition parameters of seismic data based on the location and scale of the horizontal observation points.

[0066] In one embodiment, the relationship between stress and strain fields is as follows:

[0067] σ ij =C ijkl ε kl ;

[0068] Among them, C ijkl is a fourth-order tensor representing the elastic coefficient matrix; σ ij is a second-order tensor representing stress; ε kl It is a second-order tensor representing strain; i represents the stress acting on the i surface, j represents the projection of the stress in the direction of the coordinate plane corresponding to j, k represents the strain on the k surface, and l represents the projection of the strain in the direction of the coordinate plane corresponding to l.

[0069] In one embodiment, a module for determining the minimum number of mutually uncorrelated vertical observations required for the final observation is further included, specifically configured to:

[0070] comparing the signal-to-noise ratio corresponding to the geological characteristic information with the signal-to-noise ratio of historical seismic data;

[0071] The minimum number of mutually uncorrelated vertical observations required for the final observation is determined based on the criterion that the comparison result meets the preset conditions. The minimum number of mutually uncorrelated vertical observations required for the final observation is used to determine the minimum number of mutually uncorrelated vertical observations required for the comparison result to meet the preset conditions.

[0072] An embodiment of the present invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the method for determining geological characteristic information based on underground geological response is implemented.

[0073] An embodiment of the present invention further provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the method for determining geological characteristic information based on underground geological response is implemented.

[0074] An embodiment of the present invention further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, it implements the above-mentioned method for determining geological characteristic information based on underground geological response.

[0075] In an embodiment of the present invention, a shot gather domain under the same excitation signal is obtained according to required geological characteristic information, and the shot gather domain includes seismic data under multiple paths; the seismic data under the multiple paths are separated to obtain seismic data of each path, and the seismic data includes acquisition parameters of the seismic data; when the near-field wavelet is determined, the seismic data of the same path are transformed to obtain stress and strain fields; according to the minimum number of mutually uncorrelated vertical observations, the stress and strain fields are substituted into the Hooke's equation to solve and obtain the rock physical parameters required for the target; the minimum number of mutually uncorrelated vertical observations is determined according to the number of rock physical parameters required in the geological medium to be identified, and the required rock physical parameters are determined according to the geological characteristic information of the medium to be identified according to the Hooke's equation; the mutually uncorrelated vertical observations refer to excitation observations performed at the same excitation point using mutually uncorrelated excitation signals; according to the rock physical parameters required by the target, the geological characteristic information is accurately determined, and the reliability of the geological information is improved.

[0076] The present invention aims to determine geological characteristic information based on underground geological responses, integrate the different characteristics of horizontal observation and vertical observation, so that seismic data can satisfy the requirements of obtaining multiple sets of rock physical parameters in the geological medium from the Hooke equation, thereby solving the problem of geological information positioning of mineral deposits, accurately determining geological characteristic information, improving the reliability of geological characteristic information, and achieving a breakthrough in the ability of seismic exploration of mineral deposits.

[0077] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may be based on a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may be based on a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0078] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0079] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0080] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0081] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for determining geological characteristic information based on underground geological response, characterized in that: include: Acquire a shot gather domain under the excitation signal according to required geological characteristic information, wherein the shot gather domain includes seismic data under multiple paths; Separating the seismic data under the multiple paths to obtain seismic data of the respective paths, wherein the seismic data includes acquisition parameters of the seismic data; When the near-field wavelet is determined, the seismic data of the same path are transformed to obtain stress and strain fields; Substituting the stress and strain fields into the Hooke equation based on the minimum number of mutually uncorrelated vertical observations to obtain the required rock physical parameters of the target; the minimum number of mutually uncorrelated vertical observations is determined based on the number of required rock physical parameters in the geological medium to be identified, and the required rock physical parameters are determined based on the geological characteristic information of the medium to be identified based on the Hooke equation; the mutually uncorrelated vertical observations refer to excitation observations performed at the same excitation point using mutually uncorrelated excitation signals; Determine the geological characteristic information of the medium to be identified based on the rock physical parameters required by the target.

2. The method according to claim 1, wherein After obtaining the shot gather domain under the same excitation signal, it also includes: Determine the location and scale of horizontal observation points based on the positioning information and separation requirements of each path; Determine the acquisition parameters of seismic data based on the location and scale of the horizontal observation points.

3. The method according to claim 1, wherein The relationship between stress and strain fields is as follows: s ij =C ijkl e kl ; Among them, C ijkl is a fourth-order tensor representing the elastic coefficient matrix; σ ij is a second-order tensor representing stress; ε kl It is a second-order tensor representing strain; i represents the stress acting on the i surface, j represents the projection of the stress in the direction of the coordinate plane corresponding to j, k represents the strain on the k surface, and l represents the projection of the strain in the direction of the coordinate plane corresponding to l.

4. The method according to claim 1, wherein After determining the geological characteristics of the medium to be identified based on the required rock physical parameters, the following steps are also included: comparing the signal-to-noise ratio corresponding to the geological characteristic information with the signal-to-noise ratio of historical seismic data; The minimum number of mutually uncorrelated vertical observations required for the final observation is determined based on the criterion that the comparison result meets the preset conditions. The minimum number of mutually uncorrelated vertical observations required for the final observation is used to determine the minimum number of mutually uncorrelated vertical observations required for the comparison result to meet the preset conditions.

5. A device for determining geological characteristic information based on underground geological responses, characterized in that: include: A shot gather domain acquisition module is used to acquire a shot gather domain under the same excitation signal according to required geological feature information, wherein the shot gather domain includes seismic data under multiple paths; A seismic data acquisition module is used to separate the seismic data under multiple paths to obtain seismic data of each path, wherein the seismic data includes acquisition parameters of the seismic data; The stress and strain field determination module is used to transform the seismic data of the same path to obtain the stress and strain fields when the near-field wavelet is determined; A rock physical parameter determination module is configured to substitute stress and strain fields into the Hooke equation to solve the required rock physical parameters based on a minimum number of mutually uncorrelated vertical observations. The minimum number of mutually uncorrelated vertical observations is determined based on the number of required rock physical parameters in the geological medium to be identified, where the required rock physical parameters are determined based on the geological characteristic information of the medium to be identified based on the Hooke equation. The mutually uncorrelated vertical observations refer to excitation observations performed at the same excitation point using mutually uncorrelated excitation signals. The geological characteristic information determination module is used to determine the geological characteristic information of the medium to be identified based on the rock physical parameters required by the target.

6. The device according to claim 5, characterized in that It also includes an acquisition parameter determination module, specifically used to: Determine the location and scale of horizontal observation points based on the positioning information and separation requirements of each path; Determine the acquisition parameters of seismic data based on the location and scale of the horizontal observation points.

7. The device according to claim 5, characterized in that The relationship between stress and strain fields is as follows: s ij =C ijkl e kl ; Among them, C ijkl is a fourth-order tensor representing the elastic coefficient matrix; σ ij is a second-order tensor representing stress; ε kl It is a second-order tensor representing strain; i represents the stress acting on the i surface, j represents the projection of the stress in the direction of the coordinate plane corresponding to j, k represents the strain on the k surface, and l represents the projection of the strain in the direction of the coordinate plane corresponding to l.

8. The device according to claim 5, wherein It also includes a module for determining the minimum number of mutually uncorrelated vertical observations required for the final observation, specifically for: comparing the signal-to-noise ratio corresponding to the geological characteristic information with the signal-to-noise ratio of historical seismic data; The minimum number of mutually uncorrelated vertical observations required for the final observation is determined based on the criterion that the comparison result meets the preset conditions. The minimum number of mutually uncorrelated vertical observations required for the final observation is used to determine the minimum number of mutually uncorrelated vertical observations required for the comparison result to meet the preset conditions.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the method according to any one of claims 1 to 4 is implemented.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 4 is implemented.

11. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 4 is implemented.

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