A method, apparatus, electronic device and storage medium for seismic velocity field stitching

Abstract

This invention discloses a method, apparatus, electronic device, and storage medium for stitching together seismic velocity fields. The method includes: determining a first and a second seismic velocity field within a three-dimensional survey area, wherein the spatial ranges corresponding to the first and second seismic velocity fields overlap; determining a fifth seismic velocity field based on a third and a fourth seismic velocity field, which is used to smoothly transition from the first to the second seismic velocity field or vice versa; and stitching together a sixth, fifth, and seventh seismic velocity field to form an eighth seismic velocity field. This method effectively improves the stitching efficiency of seismic velocity fields by stitching together existing seismic velocity fields.

Description

Technical Field

[0001] This invention relates to the field of oil and gas exploration and development technology, and in particular to a seismic velocity field stitching method, apparatus, electronic device and storage medium. Background Technology

[0002] With the continuous development of oil exploration, 3D seismic data has basically achieved full coverage of various depressions. The overall seismic data is formed by stitching together partial seismic data. The stitching of seismic data needs to ensure the accuracy of structure, amplitude, and phase. To ensure the accuracy of structure in the stitching area, a relatively stable, accurate, and smooth seismic velocity field is required.

[0003] Currently, the stitching of seismic velocity fields needs to be carried out simultaneously with the processing of pre-stack seismic data. Velocity information is determined by comprehensively analyzing the velocity spectrum information of two sets of pre-stack seismic data, and then the velocity field is stitched together through stacking. However, the processing of pre-stack seismic data is a complex process, involving issues such as the consistency of the observation system and pre-stack gathers, which is time-consuming and results in low efficiency of seismic velocity field stitching. Summary of the Invention

[0004] This invention provides a method, apparatus, electronic device, and storage medium for stitching seismic velocity fields to solve the problem of low efficiency when stitching seismic velocity fields.

[0005] According to one aspect of the present invention, a method for stitching together seismic velocity fields is provided, the method comprising:

[0006] Determine the first and second seismic velocity fields within the three-dimensional work area. The spatial ranges corresponding to the first and second seismic velocity fields overlap.

[0007] The fifth seismic velocity field is determined based on the third and fourth seismic velocity fields. The third seismic velocity field is the seismic velocity field of the first seismic velocity field within the target range, and the fourth seismic velocity field is the seismic velocity field of the second seismic velocity field within the target range. The target range is the overlapping range between the spatial range corresponding to the first seismic velocity field and the spatial range corresponding to the second seismic velocity field. The fifth seismic velocity field is used to smoothly transition from the first seismic velocity field to the second seismic velocity field or smoothly transition from the second seismic velocity field to the first seismic velocity field.

[0008] The eighth seismic velocity field is formed by splicing together the sixth, fifth, and seventh seismic velocity fields. The sixth seismic velocity field is the seismic velocity field in the first seismic velocity field excluding the third seismic velocity field, and the seventh seismic velocity field is the seismic velocity field in the second seismic velocity field excluding the fourth seismic velocity field.

[0009] According to another aspect of the present invention, a seismic velocity field stitching device is provided, the device comprising:

[0010] The first determining module is used to determine the first seismic velocity field and the second seismic velocity field within the three-dimensional work area, and there is an overlap between the spatial range corresponding to the first seismic velocity field and the spatial range corresponding to the second seismic velocity field.

[0011] The second determining module is used to determine the fifth seismic velocity field based on the third and fourth seismic velocity fields. The third seismic velocity field is the seismic velocity field of the first seismic velocity field within the target range, and the fourth seismic velocity field is the seismic velocity field of the second seismic velocity field within the target range. The target range is the overlapping range between the spatial range corresponding to the first seismic velocity field and the spatial range corresponding to the second seismic velocity field. The fifth seismic velocity field is used to smoothly transition from the first seismic velocity field to the second seismic velocity field or smoothly transition from the second seismic velocity field to the first seismic velocity field.

[0012] The first stitching module is used to stitch together the sixth, fifth, and seventh seismic velocity fields to form the eighth seismic velocity field. The sixth seismic velocity field is the seismic velocity field in the first seismic velocity field excluding the third seismic velocity field, and the seventh seismic velocity field is the seismic velocity field in the second seismic velocity field excluding the fourth seismic velocity field.

[0013] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0014] At least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores a computer program executable by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the seismic velocity field stitching method of any embodiment of the present invention.

[0015] According to another aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium storing computer instructions for causing a processor to execute and implement the seismic velocity field stitching method of any embodiment of the present invention.

[0016] The technical solution of this invention determines a first and a second seismic velocity field within a three-dimensional work area, where the spatial ranges corresponding to the first and second seismic velocity fields overlap. A fifth seismic velocity field is determined based on a third and a fourth seismic velocity field. The third seismic velocity field is the seismic velocity field of the first seismic velocity field within the target range, and the fourth seismic velocity field is the seismic velocity field of the second seismic velocity field within the target range. The fifth seismic velocity field is used to smoothly transition from the first seismic velocity field to the second seismic velocity field or vice versa, thereby reducing the impact of the first and second seismic velocity fields based on the fifth seismic velocity field. The velocity differences within the target range during velocity field stitching effectively improve the stitching effect. An eighth seismic velocity field is formed by stitching together the sixth, fifth, and seventh seismic velocity fields. The sixth seismic velocity field comprises all seismic velocity fields in the first seismic velocity field except for the third, and the seventh seismic velocity field comprises all seismic velocity fields in the second seismic velocity field except for the fourth. This achieves stitching based on existing seismic velocity fields, avoiding the pre-stack processing of seismic data. The overall stitching process is simple to operate and effectively improves the stitching efficiency of seismic velocity fields. Furthermore, the resulting eighth seismic velocity field meets the stitching requirements of seismic velocity fields and has good application effects.

[0017] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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 effort.

[0019] Figure 1 A flowchart of a seismic velocity field stitching method provided in an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of a first seismic velocity field provided in an embodiment of the present invention;

[0021] Figure 3 A schematic diagram of a second seismic velocity field provided in an embodiment of the present invention;

[0022] Figure 4 A schematic diagram of an eighth seismic velocity field provided in an embodiment of the present invention;

[0023] Figure 5 A schematic diagram of the depth grid corresponding to the first seismic velocity field, the second seismic velocity field, and the eighth seismic velocity field, provided for an embodiment of the present invention;

[0024] Figure 6 A flowchart of another seismic velocity field stitching method provided in an embodiment of the present invention;

[0025] Figure 7 A schematic diagram of a differential velocity field provided in an embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of the structure of a seismic velocity field splicing device provided in an embodiment of the present invention;

[0027] Figure 9 This is a schematic diagram of the structure of an electronic device for implementing a seismic velocity field splicing method, provided in an embodiment of the present invention. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0029] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0030] Figure 1 This is a flowchart illustrating a seismic velocity field stitching method provided in an embodiment of the present invention. This embodiment is applicable to situations involving the stitching of seismic velocity fields. The method can be executed by a seismic velocity field stitching device, which can be implemented in hardware and / or software and configured in an electronic device implementing the seismic velocity field stitching method. Figure 1 As shown, the seismic velocity field stitching method includes:

[0031] S101. Determine the first and second seismic velocity fields within the three-dimensional work area. The spatial ranges corresponding to the first and second seismic velocity fields overlap.

[0032] In this context, a three-dimensional work area can refer to a three-dimensional geological region with a defined spatial extent, used for three-dimensional seismic exploration. When seismic waves propagate through the subsurface medium, their propagation speed varies due to differences in the physical properties and geological structure of the medium. Consequently, the seismic velocity field can contain the seismic wave propagation velocity value at each point in the subsurface medium of the three-dimensional work area.

[0033] The first seismic velocity field describes the spatial distribution of seismic wave propagation velocity in the subsurface medium within a first spatial range of the three-dimensional work area. The first spatial range is the spatial range corresponding to the first seismic velocity field. The second seismic velocity field describes the spatial distribution of seismic wave propagation velocity in the subsurface medium within a second spatial range of the three-dimensional work area. The second spatial range is the spatial range corresponding to the second seismic velocity field. The first and second spatial ranges overlap.

[0034] As an optional implementation of the present invention, determining the first and second seismic velocity fields within a three-dimensional work area includes: determining the first and second superimposed velocity fields based on seismic acquisition data of the three-dimensional work area, wherein there is an overlap between the spatial range corresponding to the first and second superimposed velocity fields; converting the first superimposed velocity field into an average velocity field as the first seismic velocity field; and converting the second superimposed velocity field into an average velocity field as the second seismic velocity field.

[0035] Seismic acquisition data refers to the raw data recorded and acquired from seismic wave signals propagating, reflected, or refracted in the subsurface medium of a three-dimensional survey area. The stacking velocity field describes the spatial distribution of stacking velocities. Stacking velocity refers to the velocity obtained during the dynamic correction process of common reflection point gathers, which achieves the optimal stacking effect. The average velocity field describes the spatial distribution of average velocities. Average velocity refers to the ratio of the propagation distance of a seismic wave from the surface to the reflection interface to the time taken. By using the stacking velocity as the root mean square velocity, layer velocity can be calculated; and by using the layer velocity, average velocity can be calculated, thus enabling the conversion of stacking velocity to average velocity.

[0036] Specifically, based on seismic acquisition data from a 3D seismic survey area, the first and second stacked velocity fields can be calculated through velocity analysis. By converting the first stacked velocity field into the corresponding average velocity field, the first seismic velocity field can be obtained; by converting the first stacked velocity field into the corresponding average velocity field, the second seismic velocity field can be obtained, thus enabling seismic velocity field stitching starting from the stacking velocity, which meets the actual needs of seismic exploration.

[0037] S102. Determine the fifth seismic velocity field based on the third and fourth seismic velocity fields. The third seismic velocity field is the seismic velocity field of the first seismic velocity field within the target range, and the fourth seismic velocity field is the seismic velocity field of the second seismic velocity field within the target range. The target range is the overlapping range between the spatial range corresponding to the first seismic velocity field and the spatial range corresponding to the second seismic velocity field. The fifth seismic velocity field is used to smoothly transition from the first seismic velocity field to the second seismic velocity field or smoothly transition from the second seismic velocity field to the first seismic velocity field.

[0038] For details, please refer to Figure 2 The first seismic velocity field can be divided into the third and sixth seismic velocity fields; (Reference) Figure 3 The second seismic velocity field can be divided into the fourth and seventh seismic velocity fields; the third and fourth seismic velocity fields correspond to the same spatial range. Furthermore, referencing... Figure 4 The fifth seismic velocity field is determined based on the third and fourth seismic velocity fields, so that the fifth seismic velocity field can be used to reduce the velocity difference within the target range when the first and second seismic velocity fields are spliced ​​together.

[0039] As an optional implementation of the present invention, before determining the fifth seismic velocity field based on the third and fourth seismic velocity fields, the method includes: performing a preset processing on the first and second seismic velocity fields, wherein the preset processing is used to make the line numbers, start and end times, and sampling rates of the first and second seismic velocity fields consistent.

[0040] Among these, "consistent line / channel number" means that the survey line numbers corresponding to the first and second seismic velocity fields, as well as the receiver channel numbers on each survey line, are identical, and the order of the survey line numbers and receiver channel numbers is consistent. "Consistent start and end times" means that the start and end times of the first and second seismic velocity fields on the time axis are identical. "Consistent sampling rate" means that the sampling frequencies of the first and second seismic velocity fields on the time axis are identical.

[0041] S103. The eighth seismic velocity field is formed by splicing together the sixth, fifth and seventh seismic velocity fields. The sixth seismic velocity field is the seismic velocity field in the first seismic velocity field except for the third seismic velocity field, and the seventh seismic velocity field is the seismic velocity field in the second seismic velocity field except for the fourth seismic velocity field.

[0042] For details, please refer to Figure 4 The eighth seismic velocity field can be obtained by stitching together the sixth, fifth, and seventh seismic velocity fields. The eighth seismic velocity field is the result of stitching together the first and second seismic velocity fields, realizing stitching based on existing seismic velocity fields and effectively improving the stitching efficiency of seismic velocity fields.

[0043] As an optional embodiment of the present invention, the seismic velocity field stitching method further includes the following steps A1-A2:

[0044] Step A1: Apply the first seismic velocity field, the second seismic velocity field, and the eighth seismic velocity field to perform time-depth conversion based on the same time grid to obtain the depth grid corresponding to the first seismic velocity field, the second seismic velocity field, and the eighth seismic velocity field.

[0045] Step A2: Determine the stitching effect of the eighth seismic velocity field based on the depth grid corresponding to the first seismic velocity field, the depth grid corresponding to the second seismic velocity field, and the depth grid corresponding to the eighth seismic velocity field.

[0046] In this context, a time grid refers to a spatial and temporal data structure built upon the propagation time of seismic waves. Time grids can be used to record the temporal information of seismic reflection interfaces. Time-depth conversion refers to the process of converting seismic reflection time information into subsurface depth information based on the seismic velocity field. The same time grid ensures that the time-depth conversions of the first, second, and eighth seismic velocity fields are performed in the same spatial and temporal dimensions. A depth grid refers to a spatial and depth data structure obtained by converting time information through time-depth conversion. Depth grids can be used to represent the actual depth of the subsurface medium.

[0047] For details, please refer to Figure 5 There is a significant steep ridge between the depth grid corresponding to the first and second seismic velocity fields at the splicing position shown by the dashed line, while the depth grid corresponding to the eighth seismic velocity field is smoother at the splicing position shown by the dashed line, indicating that the eighth seismic velocity field has a better splicing effect.

[0048] The technical solution of this invention determines a first and a second seismic velocity field within a three-dimensional work area, where the spatial ranges corresponding to the first and second seismic velocity fields overlap. A fifth seismic velocity field is determined based on a third and a fourth seismic velocity field. The third seismic velocity field is the seismic velocity field of the first seismic velocity field within the target range, and the fourth seismic velocity field is the seismic velocity field of the second seismic velocity field within the target range. The fifth seismic velocity field is used to smoothly transition from the first seismic velocity field to the second seismic velocity field or vice versa, thereby reducing the impact of the first and second seismic velocity fields based on the fifth seismic velocity field. The velocity differences within the target range during velocity field stitching effectively improve the stitching effect. An eighth seismic velocity field is formed by stitching together the sixth, fifth, and seventh seismic velocity fields. The sixth seismic velocity field comprises all seismic velocity fields in the first seismic velocity field except for the third, and the seventh seismic velocity field comprises all seismic velocity fields in the second seismic velocity field except for the fourth. This achieves stitching based on existing seismic velocity fields, avoiding the pre-stack processing of seismic data. The overall stitching process is simple to operate and effectively improves the stitching efficiency of seismic velocity fields. Furthermore, the resulting eighth seismic velocity field meets the stitching requirements of seismic velocity fields and has good application effects.

[0049] Figure 6 This is a flowchart illustrating another seismic velocity field stitching method provided by an embodiment of the present invention. The technical solution of this embodiment further optimizes the process of determining the fifth seismic velocity field based on the third and fourth seismic velocity fields in the aforementioned embodiments, building upon the technical solutions of the previous embodiments. Solutions not described in detail in this embodiment are found in the aforementioned embodiments. This embodiment can be combined with various optional solutions from one or more of the above embodiments. Figure 6 As shown, the seismic velocity field stitching method includes:

[0050] S201. Determine the first and second seismic velocity fields within the three-dimensional work area. The spatial ranges corresponding to the first and second seismic velocity fields overlap.

[0051] S202, Use the third seismic velocity field as the target velocity field and the fourth seismic velocity field as the reference velocity field, or use the fourth seismic velocity field as the target velocity field and the third seismic velocity field as the reference velocity field.

[0052] Specifically, when the third seismic velocity field is the target velocity field and the fourth seismic velocity field is the reference velocity field, the second seismic velocity field can be smoothly transitioned to the first seismic velocity field, using the first seismic velocity field as a reference. When the fourth seismic velocity field is the target velocity field and the third seismic velocity field is the reference velocity field, the first seismic velocity field can be smoothly transitioned to the second seismic velocity field, using the second seismic velocity field as a reference.

[0053] S203. Determine the velocity difference between points within the target range based on the target velocity field and the reference velocity field. The velocity difference is the velocity difference between the target velocity field and the reference velocity field at the same spatial location.

[0054] Specifically, the velocity difference between points within the target range can be obtained by subtracting the target velocity field from the reference velocity field and calculating the velocity difference at each corresponding spatial location in the target and reference velocity fields.

[0055] S204. Based on the velocity differences at each point, a grid is formed to create a differential velocity field.

[0056] Mesh generation can be used to create a continuous velocity field from discrete velocity differences at various points. Mesh generation can be achieved by spatially interpolating the velocity differences onto the mesh nodes. For details, refer to [link to relevant documentation]. Figure 7 The velocity field formed by gridding based on the velocity differences at each point within the target range can be used as the differential velocity field.

[0057] As an optional implementation of the present invention, a differential velocity field is formed by meshing based on the velocity differences at each point, including: forming a differential velocity field within the target range by constraining the mesh with a layered mesh based on the velocity differences at each point.

[0058] Stratigraphic grid-constrained meshing refers to dividing the target area into independent stratigraphic sub-regions based on stratigraphic interfaces, performing meshing separately within each sub-region, and ensuring the continuity of velocity differences at the stratigraphic interfaces. Stratigraphic grid constraints can prevent abrupt changes in velocity differences between different strata. Specifically, by applying stratigraphic grid-constrained meshing to the velocity differences at various points within the target area, a smooth differential velocity field can be obtained.

[0059] S205. Add the difference velocity field to the reference velocity field to obtain the fifth seismic velocity field.

[0060] Specifically, by adding the differential velocity field to the reference velocity field to obtain the fifth seismic velocity field, the accuracy and acquisition efficiency of the fifth seismic velocity field can be improved.

[0061] S206. The eighth seismic velocity field is formed by splicing together the sixth, fifth, and seventh seismic velocity fields. The sixth seismic velocity field is the seismic velocity field in the first seismic velocity field except for the third seismic velocity field, and the seventh seismic velocity field is the seismic velocity field in the second seismic velocity field except for the fourth seismic velocity field.

[0062] As an optional implementation of this invention, after stitching together the sixth, fifth, and seventh seismic velocity fields to form the eighth seismic velocity field, the method further includes: if the smoothness at the first stitching position and / or the second stitching position in the eighth seismic velocity field is not greater than a preset smoothness, then the fifth seismic velocity field is meshed, and the eighth seismic velocity field is re-stitched based on the sixth seismic velocity field, the meshed fifth seismic velocity field, and the seventh seismic velocity field, where the first stitching position is the stitching point between the sixth and fifth seismic velocity fields, and the second stitching position is the stitching point between the fifth and seventh seismic velocity fields.

[0063] Smoothness can be used to describe the continuity of velocity distribution in the spatial distribution of the seismic velocity field. If the smoothness at the first or second stitching position is not greater than a preset smoothness, it indicates a discontinuity in the velocity variation at that position. Specifically, when the smoothness at the first stitching position, the smoothness at the second stitching position, or both the smoothness at the first and second stitching positions in the eighth seismic velocity field are not greater than the preset smoothness, the fifth seismic velocity field is gridded. Then, based on the sixth seismic velocity field, the gridded fifth seismic velocity field, and the seventh seismic velocity field, a new eighth seismic velocity field is formed to further improve the stitching effect of the eighth seismic velocity field.

[0064] The technical solution of this invention involves determining a first and a second seismic velocity field within a three-dimensional work area, where the spatial ranges corresponding to the first and second seismic velocity fields overlap; using a third seismic velocity field as the target velocity field and a fourth seismic velocity field as a reference velocity field, or using the fourth seismic velocity field as the target velocity field and the third seismic velocity field as the reference velocity field; determining the velocity difference at each point within the target range based on the target and reference velocity fields, where the velocity difference is the velocity difference between the target and reference velocity fields at the same spatial location; performing gridding based on the velocity differences at each point to form a difference velocity field; and adding the difference velocity field to the reference velocity field. The fifth seismic velocity field was obtained by performing simple calculations on the third and fourth seismic velocity fields, effectively improving the accuracy and acquisition efficiency of the fifth seismic velocity field. The eighth seismic velocity field was formed by stitching together the sixth, fifth, and seventh seismic velocity fields. The sixth seismic velocity field is the seismic velocity field in the first seismic velocity field excluding the third, and the seventh seismic velocity field is the seismic velocity field in the second seismic velocity field excluding the fourth. This method of stitching together existing seismic velocity fields avoids the pre-stack processing of seismic data. The overall stitching process is simple to operate and effectively improves the stitching efficiency of the seismic velocity fields.

[0065] Figure 8 This is a schematic diagram of a seismic velocity field stitching device provided in an embodiment of the present invention. This embodiment of the present invention is applicable to the stitching of seismic velocity fields, and the device can be implemented in hardware and / or software. Figure 8 As shown, the seismic velocity field splicing device includes:

[0066] The first determining module 301 is used to determine the first seismic velocity field and the second seismic velocity field within the three-dimensional work area, and there is an overlap between the spatial range corresponding to the first seismic velocity field and the spatial range corresponding to the second seismic velocity field.

[0067] The second determining module 302 is used to determine a fifth seismic velocity field based on the third and fourth seismic velocity fields. The third seismic velocity field is the seismic velocity field of the first seismic velocity field within the target range, and the fourth seismic velocity field is the seismic velocity field of the second seismic velocity field within the target range. The target range is the overlapping range between the spatial range corresponding to the first seismic velocity field and the spatial range corresponding to the second seismic velocity field. The fifth seismic velocity field is used to smoothly transition from the first seismic velocity field to the second seismic velocity field or smoothly transition from the second seismic velocity field to the first seismic velocity field.

[0068] The first splicing module 303 is used to splice the sixth, fifth and seventh seismic velocity fields to form the eighth seismic velocity field. The sixth seismic velocity field is the seismic velocity field in the first seismic velocity field except for the third seismic velocity field, and the seventh seismic velocity field is the seismic velocity field in the second seismic velocity field except for the fourth seismic velocity field.

[0069] Based on any of the above-mentioned optional technical solutions, optionally, the first determining module 301 includes: a third determining unit, a first conversion unit, and a second conversion unit. The third determining unit is used to determine a first stacked velocity field and a second stacked velocity field based on seismic acquisition data of the three-dimensional work area, wherein the spatial range corresponding to the first stacked velocity field and the spatial range corresponding to the second stacked velocity field overlap; the first conversion unit is used to convert the first stacked velocity field into an average velocity field as the first seismic velocity field; the second conversion unit is used to convert the second stacked velocity field into an average velocity field as the second seismic velocity field.

[0070] Based on any of the above-mentioned optional technical solutions, the seismic velocity field stitching device may optionally further include a preprocessing module. The preprocessing module is used to perform pre-processing on the first and second seismic velocity fields before determining the fifth seismic velocity field based on the third and fourth seismic velocity fields. The pre-processing is used to ensure that the line numbers, start and end times, and sampling rates of the first and second seismic velocity fields are consistent.

[0071] Based on any of the above-mentioned optional technical solutions, optionally, the second determining module 302 includes: a fourth determining unit, a fifth determining unit, a sixth determining unit, and a seventh determining unit. The fourth determining unit is used to use the third seismic velocity field as the target velocity field and the fourth seismic velocity field as the reference velocity field, or the fourth seismic velocity field as the target velocity field and the third seismic velocity field as the reference velocity field; the fifth determining unit is used to determine the velocity difference at each point within the target range based on the target velocity field and the reference velocity field, where the velocity difference is the velocity difference between the target velocity field and the reference velocity field at the same spatial location; the sixth determining unit is used to perform gridding processing based on the velocity differences at each point to form a differential velocity field; and the seventh determining unit is used to add the differential velocity field to the reference velocity field to obtain the fifth seismic velocity field.

[0072] Based on any of the above optional technical solutions, optionally, the sixth determining unit is specifically used to form a differential velocity field within the target range by layered grid constraint based on the velocity differences at each point.

[0073] Optionally, based on any of the above-mentioned optional technical solutions, the seismic velocity field stitching device further includes a second stitching module. The second stitching module is used to, after stitching together the sixth, fifth, and seventh seismic velocity fields to form an eighth seismic velocity field, if the smoothness at the first stitching position and / or the second stitching position in the eighth seismic velocity field is not greater than a preset smoothness, then perform gridding processing on the fifth seismic velocity field, and re-stitch together the sixth seismic velocity field, the gridded fifth seismic velocity field, and the seventh seismic velocity field to form the eighth seismic velocity field. The first stitching position is the stitching point between the sixth and fifth seismic velocity fields, and the second stitching position is the stitching point between the fifth and seventh seismic velocity fields.

[0074] Based on any of the above-mentioned optional technical solutions, the seismic velocity field stitching device may optionally further include: an eighth determining module and a ninth determining module. The eighth determining module is used to perform time-depth conversion on the first, second, and eighth seismic velocity fields respectively, based on the same time grid, to obtain the depth grids corresponding to the first, second, and eighth seismic velocity fields; the ninth determining module is used to determine the stitching effect of the eighth seismic velocity field based on the depth grids corresponding to the first, second, and eighth seismic velocity fields.

[0075] The technical solution of this invention involves a first determining module 301 determining a first seismic velocity field and a second seismic velocity field within a three-dimensional work area, wherein the spatial ranges corresponding to the first and second seismic velocity fields overlap. A second determining module 302 determines a fifth seismic velocity field based on a third and a fourth seismic velocity field. The third seismic velocity field is the seismic velocity field of the first seismic velocity field within the target range, and the fourth seismic velocity field is the seismic velocity field of the second seismic velocity field within the target range. The fifth seismic velocity field is used to smoothly transition from the first seismic velocity field to the second seismic velocity field or vice versa, thereby reducing the first seismic velocity field based on the fifth seismic velocity field. The velocity difference within the target range during stitching of the second and third seismic velocity fields effectively improves the stitching effect. The first stitching module 303 stitches together the sixth, fifth, and seventh seismic velocity fields to form the eighth seismic velocity field. The sixth seismic velocity field is the only seismic velocity field in the first seismic velocity field except for the third, and the seventh seismic velocity field is the only seismic velocity field in the second seismic velocity field except for the fourth. This achieves stitching based on existing seismic velocity fields, avoiding the pre-stack processing of seismic data. The overall stitching process is simple to operate and effectively improves the stitching efficiency of the seismic velocity fields. Furthermore, the resulting eighth seismic velocity field meets the stitching requirements of seismic velocity fields and has good application effects.

[0076] The seismic velocity field stitching device provided in this embodiment of the invention can execute the seismic velocity field stitching method provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the method.

[0077] Figure 9 This is a schematic diagram of an electronic device for implementing a seismic velocity field stitching method according to an embodiment of the present invention. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0078] like Figure 9As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded from storage unit 18 into the RAM 13. The RAM 13 may also store various programs and data required for the operation of the electronic device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0079] Multiple components in electronic device 10 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of displays, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0080] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as the seismic velocity field stitching method.

[0081] In particular, according to embodiments of the present invention, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of the present invention include a computer program product comprising a computer program carried on a non-transitory computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication unit 19, or installed from storage unit 18, or installed from ROM 12. When the computer program is executed by processor 11, it performs the functions defined in the methods of the embodiments of the present invention.

[0082] In some embodiments, the seismic velocity field stitching method may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on electronic device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the seismic velocity field stitching method described above may be performed. Alternatively, in other embodiments, processor 11 may be configured to perform the seismic velocity field stitching method by any other suitable means (e.g., by means of firmware).

[0083] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), system-on-a-chip (SoCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0084] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0085] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0086] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0087] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0088] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0089] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0090] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for stitching together seismic velocity fields, characterized in that, The method includes: Determine the first and second seismic velocity fields within the three-dimensional work area. The spatial ranges corresponding to the first and second seismic velocity fields overlap. A fifth seismic velocity field is determined based on a third and a fourth seismic velocity field. The third seismic velocity field is the seismic velocity field of the first seismic velocity field within the target range, and the fourth seismic velocity field is the seismic velocity field of the second seismic velocity field within the target range. The target range is the overlapping range between the spatial range corresponding to the first seismic velocity field and the spatial range corresponding to the second seismic velocity field. The fifth seismic velocity field is used to smoothly transition from the first seismic velocity field to the second seismic velocity field or smoothly transition from the second seismic velocity field to the first seismic velocity field. An eighth seismic velocity field is formed by splicing together the sixth, fifth, and seventh seismic velocity fields. The sixth seismic velocity field is the seismic velocity field in the first seismic velocity field excluding the third seismic velocity field, and the seventh seismic velocity field is the seismic velocity field in the second seismic velocity field excluding the fourth seismic velocity field.

2. The method according to claim 1, characterized in that, Determine the first and second seismic velocity fields within the three-dimensional work area, including: Based on the seismic acquisition data of the three-dimensional work area, a first stacked velocity field and a second stacked velocity field are determined. The spatial range corresponding to the first stacked velocity field and the spatial range corresponding to the second stacked velocity field overlap. The first superimposed velocity field is converted into an average velocity field and then used as the first seismic velocity field. The second superimposed velocity field is converted into an average velocity field and then used as the second seismic velocity field.

3. The method according to claim 1, characterized in that, Before determining the fifth seismic velocity field based on the third and fourth seismic velocity fields, the following steps are included: The first and second seismic velocity fields are subjected to preset processing, which is used to make the line numbers, start and end times, and sampling rates of the first and second seismic velocity fields consistent.

4. The method according to claim 1, characterized in that, The fifth seismic velocity field is determined based on the third and fourth seismic velocity fields, including: The third seismic velocity field is used as the target velocity field and the fourth seismic velocity field is used as the reference velocity field, or the fourth seismic velocity field is used as the target velocity field and the third seismic velocity field is used as the reference velocity field; Based on the target velocity field and the reference velocity field, the velocity difference at each point within the target range is determined, and the velocity difference is the velocity difference between the target velocity field and the reference velocity field at the same spatial position; A differential velocity field is formed by meshing based on the velocity differences at each point. The fifth seismic velocity field is obtained by adding the differential velocity field to the reference velocity field.

5. The method according to claim 4, characterized in that, A differential velocity field is formed by meshing based on the velocity differences at each point, including: Based on the velocity differences at each point, the differential velocity field is formed within the target range by layered grid constraint meshing.

6. The method according to claim 1, characterized in that, After splicing the sixth, fifth, and seventh seismic velocity fields to form the eighth seismic velocity field, the process also includes: If the smoothness at the first and / or second splicing positions in the eighth seismic velocity field is not greater than a preset smoothness, then the fifth seismic velocity field is meshed, and the eighth seismic velocity field is formed by re-splicing based on the sixth seismic velocity field, the meshed fifth seismic velocity field, and the seventh seismic velocity field. The first splicing position is the splicing point between the sixth and fifth seismic velocity fields, and the second splicing position is the splicing point between the fifth and seventh seismic velocity fields.

7. The method according to claim 1, characterized in that, The method further includes: Based on the same time grid, the first seismic velocity field, the second seismic velocity field, and the eighth seismic velocity field are respectively applied to perform time-depth transformation to obtain the depth grid corresponding to the first seismic velocity field, the depth grid corresponding to the second seismic velocity field, and the depth grid corresponding to the eighth seismic velocity field; The stitching effect of the eighth seismic velocity field is determined based on the depth grid corresponding to the first seismic velocity field, the depth grid corresponding to the second seismic velocity field, and the depth grid corresponding to the eighth seismic velocity field.

8. A seismic velocity field splicing device, characterized in that, The device includes: The first determining module is used to determine the first seismic velocity field and the second seismic velocity field within the three-dimensional work area, wherein there is an overlap between the spatial range corresponding to the first seismic velocity field and the spatial range corresponding to the second seismic velocity field. The second determining module is used to determine a fifth seismic velocity field based on a third seismic velocity field and a fourth seismic velocity field. The third seismic velocity field is the seismic velocity field of the first seismic velocity field within a target range, and the fourth seismic velocity field is the seismic velocity field of the second seismic velocity field within a target range. The target range is the overlapping range between the spatial range corresponding to the first seismic velocity field and the spatial range corresponding to the second seismic velocity field. The fifth seismic velocity field is used to smoothly transition from the first seismic velocity field to the second seismic velocity field or smoothly transition from the second seismic velocity field to the first seismic velocity field. The first stitching module is used to stitch together the sixth seismic velocity field, the fifth seismic velocity field, and the seventh seismic velocity field to form an eighth seismic velocity field. The sixth seismic velocity field is the seismic velocity field in the first seismic velocity field excluding the third seismic velocity field, and the seventh seismic velocity field is the seismic velocity field in the second seismic velocity field excluding the fourth seismic velocity field.

9. An electronic device, characterized in that, The electronic device includes: At least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores a computer program executable by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the seismic velocity field stitching method according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that cause a processor to execute the seismic velocity field stitching method according to any one of claims 1-7.

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