Method and device for identifying sedimentary body stages in a ramp belt residual sedimentation area

Abstract

The application discloses a method and device for identifying sedimentary body stages in a residual sedimentary area of a slope zone, and relates to the technical field of oil and gas reservoir exploration and development. The application performs seismic reflection isochronous analysis on seismic data of the residual sedimentary area of the slope zone, identifies uneroded strata on the basis, determines stratum interfaces of the uneroded strata, recovers eroded strata according to the stratum interfaces of the uneroded strata, identifies sedimentary body stages of the uneroded area, determines sedimentary body stage interfaces of the uneroded area, recovers boundaries and sedimentary stages of single-stage sedimentary bodies in the residual sedimentary area of the slope zone according to the sedimentary body stage interfaces of the uneroded area, and identifies the sedimentary body stages of the residual sedimentary area of the slope zone by using the seismic data. In the identification, the influence of local erosion after deposition of the slope zone is considered, and the identification is more reasonable in terms of geological genesis constraints.

Description

Technical Field

[0001] This invention relates to the field of oil and gas reservoir exploration and development technology, and in particular to a method and apparatus for identifying sedimentary phases in residual sedimentary areas of slope zones. Background Technology

[0002] The slope zone of a continental lacustrine basin is an important clastic sedimentary area and a common favorable oil and gas reservoir area, playing a significant role in the exploration and development of oil and gas reservoirs in continental lacustrine basins. Compared with the interior of the lacustrine basin, the oil and gas reservoirs in the slope zone are more complex, mainly manifested in the following ways: due to the steep slope, sediment accumulation often results in multi-type and multi-stage sedimentation, with strong sedimentary heterogeneity within the reservoir; the sedimentary lithological assemblage in the slope zone is complex and varied, with localized seismic reflection anisotropy; slope zone sediments are easily eroded by later stages, forming residual sediments, making sedimentary system reconstruction difficult and hindering the identification of sedimentary stages and the multi-stage structural characteristics within the reservoir sedimentary bodies. Therefore, identifying the sedimentary stages of residual sedimentary areas in the slope zone has become an urgent problem to be solved in this field. Summary of the Invention

[0003] This invention provides a method and apparatus for identifying sedimentary phases in residual sedimentary areas of slope zones, thus solving the technical problem of how to identify sedimentary phases in residual sedimentary areas of slope zones.

[0004] On the one hand, embodiments of the present invention provide the following technical solutions:

[0005] A method for identifying sedimentary phases in residual sedimentary zones of slopes, comprising:

[0006] Isochronous analysis of seismic reflections was performed on seismic data from the residual sedimentary area of ​​the slope zone, and the first target region in the analysis results of the isochronous analysis was marked. The first target region is a high-value area.

[0007] The second target region is obtained by excluding the high-value areas of seismic isochronous analysis caused by faults and chaotic reflection zones of the basement from the first target region.

[0008] Seismic interpretation of isochronous interfaces is performed on the second target area to identify uneroded strata in the second target area and determine the stratigraphic interfaces of the uneroded strata;

[0009] Each of the stratigraphic interfaces is extended toward the slope along the trend of the seismic reflection phase axis until the extension line of the stratigraphic interface satisfies at least one of the following conditions: intersects with the extension lines of other stratigraphic interfaces or reaches the boundary of the study area determined according to the second target area, so as to restore the eroded strata.

[0010] Identify the sedimentary phases in the uneroded areas of the study area and determine the sedimentary phase boundaries in the uneroded areas;

[0011] The boundary of each sedimentary phase in the uneroded zone is extended toward the eroded zone in the study area until the extension line of the sedimentary phase boundary in the uneroded zone satisfies at least one of the following conditions: intersects with the extension line of other stratigraphic boundaries or other stratigraphic boundaries, and reaches the boundary of the study area, so as to restore the boundary of the single sedimentary phase and the first sedimentary phase of the residual sedimentary zone in the slope zone.

[0012] Preferably, the seismic interpretation of the second target region using isochronous interfaces includes:

[0013] Seismic interpretation of the non-transit seismic reflection zone in the second target region is performed directly using isochronous interfaces;

[0014] The seismic data is frequency-divided to obtain high-frequency seismic data, and isochronous interface seismic interpretation is performed on the time-transit seismic reflection zone in the second target region based on the high-frequency seismic data.

[0015] Preferably, identifying the sedimentary phases of the uneroded areas in the study area includes:

[0016] Obtain a cross-sectional view of the study area and use seismic facies to identify the first sedimentary phase in the uneroded area of ​​the cross-section.

[0017] Preferably, the boundary of each sedimentary phase in the uneroded zone is extended toward the eroded zone in the study area until the extension line of the sedimentary phase boundary in the uneroded zone satisfies at least one of the following conditions: intersects with the extension lines of other stratigraphic boundaries or reaches the boundary of the study area, after restoring the boundary and phase of the single sedimentary body in the residual sedimentary area of ​​the slope zone, the method further includes:

[0018] By using the stratigraphic interface and the isochronous interface to perform continuous stratigraphic slices, the planar distribution boundary of single-stage sedimentary bodies in the study area is identified on each stratigraphic slice, and the second depositional stage of the residual depositional area of ​​the slope zone is determined by the single-stage sedimentary bodies on the continuous stratigraphic slices.

[0019] The first deposition period is verified by the second deposition period.

[0020] On the other hand, embodiments of the present invention also provide the following technical solutions:

[0021] A device for identifying sedimentary phases in residual sedimentary zones on slopes includes:

[0022] The high-value area identification module is used to perform isochronous analysis of seismic reflections on seismic data of residual sedimentary areas in slope zones, and to mark the first target area in the analysis results of the isochronous analysis, wherein the first target area is a high-value area;

[0023] The high-value area exclusion module is used to exclude high-value areas in seismic isochronous analysis caused by faults and chaotic reflection zones of the basement from the first target area to obtain the second target area;

[0024] The seismic interpretation module is used to perform isochronous interface seismic interpretation on the second target area, identify uneroded strata in the second target area, and determine the stratigraphic interfaces of the uneroded strata.

[0025] The eroded strata restoration module is used to extend each of the strata interfaces toward the slope direction according to the trend of the seismic reflection phase axis until the extension line of the strata interface satisfies at least one of the following conditions: intersecting with the extension lines of other strata interfaces or reaching the boundary of the study area determined according to the second target area, so as to restore the eroded strata.

[0026] The sedimentary phase identification module is used to identify the sedimentary phases in the uneroded areas of the study area and determine the sedimentary phase interfaces in the uneroded areas.

[0027] The sedimentary phase recovery module is used to extend the sedimentary phase interface of each sedimentary phase in the uneroded area to the eroded area in the study area until the extension line of the sedimentary phase interface in the uneroded area meets at least one of the following conditions: intersects with the extension line of other stratigraphic interfaces or other stratigraphic interfaces, or reaches the boundary of the study area, so as to restore the boundary of the single sedimentary phase and the first sedimentary phase of the residual sedimentary area of ​​the slope zone.

[0028] Preferably, the seismic interpretation module is further configured to:

[0029] Seismic interpretation of the non-transit seismic reflection zone in the second target region is performed directly using isochronous interfaces;

[0030] The seismic data is frequency-divided to obtain high-frequency seismic data, and isochronous interface seismic interpretation is performed on the time-transit seismic reflection zone in the second target region based on the high-frequency seismic data.

[0031] Preferably, the sediment phase identification module is further used for:

[0032] Obtain a cross-sectional view of the study area and use seismic facies to identify the first sedimentary phase in the uneroded area of ​​the cross-section.

[0033] Preferably, the slope zone residual sedimentary body phase identification device further includes:

[0034] The slicing analysis module is used to perform continuous stratigraphic slicing using the stratigraphic interface and the isochronous interface, identify the planar distribution boundary of single-stage sedimentary bodies in the study area on each stratigraphic slice, and determine the second depositional stage of the residual sedimentary area of ​​the slope zone through the single-stage sedimentary bodies on the continuous stratigraphic slices;

[0035] The deposition period verification module is used to verify the first deposition period using the second deposition period.

[0036] On the other hand, embodiments of the present invention also provide the following technical solutions:

[0037] An electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method for identifying sedimentary phases in any of the aforementioned slope zone residual sedimentary areas.

[0038] On the other hand, embodiments of the present invention also provide the following technical solutions:

[0039] A computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for identifying sedimentary phases in any of the residual sedimentary zones of a slope zone.

[0040] One or more technical solutions provided by this invention have at least the following technical effects or advantages:

[0041] This invention performs isochronous analysis of seismic reflections from seismic data in the residual sedimentary zone of the slope zone. High-value areas in the isochronous analysis results are marked to obtain a first target region. High-value areas in the seismic isochronous analysis caused by faults and chaotic basement reflections are excluded from the first target region to obtain a second target region. Seismic interpretation of isochronous interfaces is performed on the second target region to identify uneroded strata and determine the stratigraphic interfaces of the uneroded strata. Based on the stratigraphic interfaces of the uneroded strata, eroded strata are reconstructed. The sedimentary phases in the uneroded areas are identified and their interfaces are determined. Based on the sedimentary phase interfaces of the uneroded areas, the boundaries of single-phase sedimentary bodies and the first sedimentary phase in the residual sedimentary zone of the slope zone are reconstructed. The sedimentary phases in the residual sedimentary zone of the slope zone are identified using seismic data, taking into account the influence of local erosion after slope zone deposition, making the identification more reasonable from a geological genetic constraint perspective. Attached Figure Description

[0042] 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a flowchart of the method for identifying sedimentary phases in the residual sedimentary zone of the slope zone in an embodiment of the present invention;

[0044] Figure 2 This is a schematic diagram of the study area in an embodiment of the present invention;

[0045] Figure 3 This is a structural block diagram of the device for identifying sedimentary phases in the residual sedimentary zone of the slope zone in an embodiment of the present invention. Detailed Implementation

[0046] The present invention provides a method and apparatus for identifying sedimentary phases in residual sedimentary areas of slope zones, thereby solving the technical problem of how to identify sedimentary phases in residual sedimentary areas of slope zones.

[0047] To better understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] like Figure 1 As shown, the method for identifying sedimentary phases in the residual sedimentary zone of the slope zone in this embodiment includes:

[0049] Step S1: Perform isochronous analysis of seismic reflections on the seismic data of the residual sedimentary area of ​​the slope zone, and mark the first target area in the analysis results of the isochronous analysis. The first target area is the high value area.

[0050] Step S2: Exclude high-value areas of seismic isochronous analysis caused by faults and chaotic reflection zones in the basement from the first target area to obtain the second target area;

[0051] Step S3: Perform seismic interpretation of isochronous interfaces in the second target area, identify uneroded strata in the second target area, and determine the stratigraphic interfaces of the uneroded strata.

[0052] Step S4: Extend each stratigraphic interface toward the slope along the trend of the seismic reflection phase axis until the extension line of the stratigraphic interface meets at least one of the following conditions: intersects with the extension lines of other stratigraphic interfaces or reaches the boundary of the study area determined according to the second target area, so as to restore the eroded strata.

[0053] Step S5: Identify the sedimentary phases in the uneroded areas of the study area and determine the sedimentary phase boundaries in the uneroded areas;

[0054] Step S6: Extend the boundary of each sedimentary phase in the uneroded area toward the eroded area in the study area until the extension line of the sedimentary phase boundary in the uneroded area meets at least one of the following conditions: intersects with the extension line of other stratigraphic interfaces or reaches the boundary of the study area, so as to restore the boundary of the single sedimentary phase and the first sedimentary phase of the residual sedimentary area in the slope zone.

[0055] In step S1, the isochronous analysis of seismic reflection can be performed using the frequency division dip difference method. Specifically, this includes performing frequency division, frequency division dip analysis, and dip subtraction analysis on the seismic data of the residual sedimentary area of ​​the slope zone in sequence, marking the high-value areas in the analysis results, and identifying the first target area as the possible time-through seismic reflection zone.

[0056] Step S2 is used to remove the high-value areas of seismic isochronous analysis caused by faults and chaotic reflection zones of the basement in the first target area. The second target area is the area in the first target area other than the high-value areas of seismic isochronous analysis caused by faults and chaotic reflection zones of the basement.

[0057] In step S3, the seismic interpretation of the isochronous interface in the second target area is performed, specifically including: directly performing isochronous interface seismic interpretation on the non-time-transmission seismic reflection zone in the second target area; performing frequency division processing on the seismic data to obtain high-frequency seismic data; and performing isochronous interface seismic interpretation on the time-transmission seismic reflection zone in the second target area based on the high-frequency seismic data; thus completing the seismic interpretation of the isochronous interface of the entire second target area. Specifically, frequency division processing can be performed on the seismic data to obtain high-frequency seismic data with a dominant frequency of 45Hz.

[0058] Identifying uneroded strata within the second target region specifically involves identifying slope unconformities in seismic data; the area below the unconformity is considered uneroded strata. The second target region can be a large area; this embodiment selects a portion of the second target region as the study area. The uneroded strata in the study area are as follows: Figure 2 As shown, the stratigraphic interface is the boundary between two adjacent uneroded strata, and the intersection of the stratigraphic interface and the unconformity is the cut-off point.

[0059] Step S4 can restore the eroded strata by extending the stratigraphic interface of the uneroded strata, thus providing... Figure 2 The strata between the dashed lines. The following conditions mentioned in step S4 include three conditions: intersection with other stratigraphic interfaces, intersection with the extension lines of other stratigraphic interfaces, and reaching the boundary of the study area determined according to the second target area.

[0060] In step S5, identifying the sedimentary phases in the uneroded area of ​​the study area specifically includes: obtaining a cross-sectional map of the study area and using seismic facies to identify the first sedimentary phase in the uneroded area of ​​the cross-section. Step S6 is similar in principle to step S4, essentially restoring the boundary and first sedimentary phase of the single-phase sedimentary body in the residual sedimentary area of ​​the slope zone by extending the sedimentary phase interface of the uneroded area, thus achieving the identification of the sedimentary phases in the residual sedimentary area of ​​the slope zone. The following conditions mentioned in step S4 also include three conditions: intersection with other stratigraphic interfaces, intersection with the extension lines of other stratigraphic interfaces, and reaching the boundary of the study area determined according to the second target area.

[0061] As can be seen from the above, this embodiment uses seismic data to identify the sedimentary phases of the residual sedimentary zone on the slope. The identification process takes into account the influence of local erosion after the deposition of the slope, which is more reasonable from the perspective of geological genesis.

[0062] After identifying the sedimentary phases of the residual sedimentary zone on the slope based on seismic data, it is necessary to verify the accuracy of the obtained sedimentary phases. Therefore, following step S6, the method for identifying the sedimentary phases of the residual sedimentary zone on the slope in this embodiment further includes:

[0063] Continuous stratigraphic slices were created using stratigraphic interfaces and isochronous interfaces. The planar distribution boundaries of single-stage sedimentary bodies in the study area were identified on each stratigraphic slice. The second depositional stage of the residual sedimentary zone in the slope zone was determined using these single-stage sedimentary bodies. The first depositional stage was then verified using the second depositional stage. If the second depositional stage is the same as the first depositional stage, the first depositional stage is considered correct.

[0064] like Figure 3 As shown, this embodiment also provides a device for identifying sedimentary phases in residual sedimentary zones of slopes, including:

[0065] The high-value area identification module is used to perform isochronous analysis of seismic reflections on seismic data from residual sedimentary areas in slope zones, and to mark the first target area in the analysis results of the isochronous analysis. The first target area is the high-value area.

[0066] The high-value area exclusion module is used to exclude high-value areas in seismic isochronous analysis caused by faults and chaotic basement reflection zones from the first target area, thus obtaining the second target area.

[0067] The seismic interpretation module is used to perform seismic interpretation of isochronous interfaces in the second target area, identify uneroded strata in the second target area, and determine the stratigraphic interfaces of the uneroded strata.

[0068] The eroded strata restoration module is used to extend each stratigraphic interface toward the slope direction along the trend of the seismic reflection phase axis until the extension line of the stratigraphic interface meets at least one of the following conditions: intersects with the extension lines of other stratigraphic interfaces or reaches the boundary of the study area determined according to the second target area, so as to restore the eroded strata.

[0069] The sedimentary phase identification module is used to identify the sedimentary phases in the uneroded areas of the study area and determine the sedimentary phase boundaries in the uneroded areas.

[0070] The sedimentary phase restoration module is used to extend the boundary of each sedimentary phase in the uneroded area into the eroded area in the study area until the extension line of the sedimentary phase boundary in the uneroded area meets at least one of the following conditions: intersects with the extension line of other stratigraphic interfaces or reaches the boundary of the study area, so as to restore the boundary of the single sedimentary body and the first sedimentary phase in the residual sedimentary area of ​​the slope zone.

[0071] Furthermore, the seismic interpretation module is also used for:

[0072] Seismic interpretation of the non-diameter seismic reflection zone in the second target region is performed directly using isochronous interfaces;

[0073] The seismic data is frequency-divided to obtain high-frequency seismic data, and the isochronous interface of the time-transit seismic reflection zone in the second target area is interpreted based on the high-frequency seismic data.

[0074] Furthermore, the sediment phase identification module is also used for:

[0075] Obtain a profile of the study area and use seismic facies to identify the first sedimentary phase in the uneroded area of ​​the profile.

[0076] Furthermore, the sedimentary phase identification device for residual sedimentary areas in the slope zone also includes:

[0077] The slicing analysis module is used to perform continuous stratigraphic slicing using stratigraphic interfaces and isochronous interfaces. On each stratigraphic slice, the planar distribution boundary of single-stage sedimentary bodies in the study area is identified. The second depositional stage of the residual sedimentary area in the slope zone is determined by the single-stage sedimentary bodies on the continuous stratigraphic slices.

[0078] The deposition period verification module is used to verify the first deposition period using the second deposition period.

[0079] Based on the same inventive concept as the slope zone residual sedimentary area sedimentary body phase identification method described above, this embodiment also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the steps of any of the methods of the slope zone residual sedimentary area sedimentary body phase identification method described above.

[0080] The bus architecture (represented by a bus) can include any number of interconnected buses and bridges, linking various circuits including one or more processors (represented by a processor) and memory (represented by memory). The bus can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface between the bus and receivers and transmitters. Receivers and transmitters can be the same element, a transceiver, providing a unit for communicating with various other devices over a transmission medium. The processor is responsible for managing the bus and general processing, while memory can be used to store data used by the processor during operation.

[0081] Since the electronic device described in this embodiment is the electronic device used to implement the method for identifying the sedimentary stages of residual sedimentary areas in slope zones according to the embodiments of the present invention, those skilled in the art can understand the specific implementation and various variations of the electronic device in this embodiment based on the method for identifying the sedimentary stages of residual sedimentary areas in slope zones described in the embodiments of the present invention. Therefore, how the electronic device implements the method in the embodiments of the present invention will not be described in detail here. Any electronic device used by those skilled in the art to implement the method for identifying the sedimentary stages of residual sedimentary areas in slope zones according to the embodiments of the present invention falls within the scope of protection of the present invention.

[0082] Based on the same inventive concept as the above-mentioned method for identifying sedimentary phases in residual sedimentary areas of slope zones, the present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements any of the above-mentioned methods for identifying sedimentary phases in residual sedimentary areas of slope zones.

[0083] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0084] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations 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, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0085] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0086] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0087] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0088] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for identifying sedimentary phases in residual sedimentary zones of slopes, characterized in that, include: Isochronous analysis of seismic reflections was performed on seismic data from the residual sedimentary area of ​​the slope zone, and the first target region in the analysis results of the isochronous analysis was marked. The first target region is a high-value area. The second target region is obtained by excluding the high-value areas of seismic isochronous analysis caused by faults and chaotic reflection zones of the basement from the first target region. Seismic interpretation of isochronous interfaces is performed on the second target area to identify uneroded strata in the second target area and determine the stratigraphic interfaces of the uneroded strata; Each of the stratigraphic interfaces is extended toward the slope along the trend of the seismic reflection phase axis until the extension line of the stratigraphic interface satisfies at least one of the following conditions: intersects with the extension lines of other stratigraphic interfaces or reaches the boundary of the study area determined according to the second target area, so as to restore the eroded strata. Identify the sedimentary phases in the uneroded areas of the study area and determine the sedimentary phase boundaries in the uneroded areas; The boundary of each sedimentary phase in the uneroded zone is extended toward the eroded zone in the study area until the extension line of the sedimentary phase boundary in the uneroded zone satisfies at least one of the following conditions: intersects with the extension line of other stratigraphic boundaries or other stratigraphic boundaries, and reaches the boundary of the study area, so as to restore the boundary of the single sedimentary phase and the first sedimentary phase of the residual sedimentary zone of the slope zone. Extending the boundary of each sedimentary phase in the uneroded zone toward the eroded zone in the study area, until the extension line of the sedimentary phase boundary in the uneroded zone satisfies at least one of the following conditions: intersecting with the extension lines of other stratigraphic boundaries or reaching the boundary of the study area, after restoring the boundary and phase of the single-phase sedimentary body in the residual sedimentary zone of the slope zone, the process further includes: By using the stratigraphic interface and the isochronous interface to perform continuous stratigraphic slices, the planar distribution boundary of single-stage sedimentary bodies in the study area is identified on each stratigraphic slice, and the second depositional stage of the residual depositional area of ​​the slope zone is determined by the single-stage sedimentary bodies on the continuous stratigraphic slices. The first deposition period is verified by the second deposition period.

2. The method for identifying sedimentary phases in residual sedimentary zones of slope zones as described in claim 1, characterized in that, Seismic interpretation of the second target region using isochronous interfaces includes: Seismic interpretation of the non-transit seismic reflection zone in the second target region is performed directly using isochronous interfaces; The seismic data is frequency-divided to obtain high-frequency seismic data, and isochronous interface seismic interpretation is performed on the time-transit seismic reflection zone in the second target region based on the high-frequency seismic data.

3. The method for identifying sedimentary phases in residual sedimentary zones of slope zones as described in claim 1, characterized in that, Identifying the sedimentary phases in the uneroded areas of the study area includes: Obtain a cross-sectional view of the study area and use seismic facies to identify the first sedimentary phase in the uneroded area of ​​the cross-section.

4. A device for identifying sedimentary phases in a residual sedimentary zone on a slope, applied to the method for identifying sedimentary phases in a residual sedimentary zone on a slope as described in any one of claims 1-3, characterized in that, include: The high-value area identification module is used to perform isochronous analysis of seismic reflections on seismic data of residual sedimentary areas in slope zones, and to mark the first target area in the analysis results of the isochronous analysis, wherein the first target area is a high-value area; The high-value area exclusion module is used to exclude high-value areas in seismic isochronous analysis caused by faults and chaotic reflection zones of the basement from the first target area to obtain the second target area; The seismic interpretation module is used to perform isochronous interface seismic interpretation on the second target area, identify uneroded strata in the second target area, and determine the stratigraphic interfaces of the uneroded strata. The eroded strata restoration module is used to extend each of the strata interfaces toward the slope direction according to the trend of the seismic reflection phase axis until the extension line of the strata interface satisfies at least one of the following conditions: intersecting with the extension lines of other strata interfaces or reaching the boundary of the study area determined according to the second target area, so as to restore the eroded strata. The sedimentary phase identification module is used to identify the sedimentary phases in the uneroded areas of the study area and determine the sedimentary phase interfaces in the uneroded areas. The sedimentary phase recovery module is used to extend the sedimentary phase interface of each sedimentary phase in the uneroded area to the eroded area in the study area until the extension line of the sedimentary phase interface in the uneroded area meets at least one of the following conditions: intersects with the extension line of other stratigraphic interfaces or other stratigraphic interfaces, or reaches the boundary of the study area, so as to restore the boundary of the single sedimentary phase and the first sedimentary phase of the residual sedimentary area of ​​the slope zone.

5. The slope zone residual sedimentary area sedimentary phase identification device as described in claim 4, characterized in that, The earthquake interpretation module is also used for: Seismic interpretation of the non-transit seismic reflection zone in the second target region is performed directly using isochronous interfaces; The seismic data is frequency-divided to obtain high-frequency seismic data, and isochronous interface seismic interpretation is performed on the time-transit seismic reflection zone in the second target region based on the high-frequency seismic data.

6. The slope zone residual sedimentary zone sedimentary phase identification device as described in claim 4, characterized in that, The sediment phase identification module is also used for: Obtain a cross-sectional view of the study area and use seismic facies to identify the first sedimentary phase in the uneroded area of ​​the cross-section.

7. The slope zone residual sedimentary zone sedimentary phase identification device as described in claim 4, characterized in that, Also includes: The slicing analysis module is used to perform continuous stratigraphic slicing using the stratigraphic interface and the isochronous interface, identify the planar distribution boundary of single-stage sedimentary bodies in the study area on each stratigraphic slice, and determine the second depositional stage of the residual sedimentary area of ​​the slope zone through the single-stage sedimentary bodies on the continuous stratigraphic slices; The deposition period verification module is used to verify the first deposition period using the second deposition period.

8. An electronic device, characterized in that, The method includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the method for identifying sedimentary phases in residual sedimentary zones of slope zones as described in any one of claims 1-3.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the method for identifying sedimentary phases in residual sedimentary zones of slope zones as described in any one of claims 1-3.

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