Ancient landform restoration method and system, computer equipment and storage medium

Abstract

The invention discloses an ancient landform restoration method and system, computer equipment and a storage medium, and relates to the technical field of oil and gas geophysical exploration engineering and equipment.The method comprises the steps that a landform restoration well-connected grillwork section corresponding to a preset subsalt carbonate rock deepwater slope area is established, and the geoform restoration well-connected grillwork section is established on the basis of basic data of the preset subsalt carbonate rock deepwater slope area; determining a thickness distribution relationship between upper-layer granular carbonate rocks and lower-layer deep-water carbonate rocks in the preset under-salt carbonate rock deep-water slope area; according to the basic data of the preset under-salt carbonate rock deepwater slope area, obtaining the specific data of the optimal seismic attribute, and based on the specific data of the optimal seismic attribute, constructing an optimal seismic attribute map; and the thickness distribution relation between the upper-layer granular carbonate rocks and the lower-layer deep-water carbonate rocks in the preset under-salt carbonate rock deep-water slope area is projected to the optimal seismic attribute map, and the ancient landform of the preset under-salt carbonate rock deep-water slope area is obtained.

Description

Background Art

[0002] Subsalt carbonate rocks play an important role in oil and gas exploration and development. The oil and gas contained in the symbiotic combination of gypsum and carbonate rocks accounts for about 46% of the total reserves of major carbonate oil and gas in the world. For example, the Permian system of the Ghawar oil field in eastern Saudi Arabia, the Ordovician system in Texas, the Upper Jurassic system in the Gulf of Mexico, and the Cretaceous system in the Santos Basin in Brazil. Reefs and karst reservoirs are important targets in carbonate oil and gas exploration and development, and their formation and development are greatly affected by paleo-geomorphology. Therefore, how to restore paleo-geomorphology more accurately is particularly important in carbonate oil and gas exploration and development.

[0003] At present, the methods commonly used for paleo-geomorphology restoration are mainly: impression method, residual thickness method, sedimentary cycle method and stratum stripping method. Different paleo-geomorphology restoration methods have different applicable conditions. Sedimentary cycle method and stratum stripping method usually rely on drilling data. For new exploration areas or areas with low drilling density, paleo-geomorphology restoration is often not possible. Although the impression method and residual thickness method can use three-dimensional seismic data to restore paleo-geomorphology by finely tracking the isochronous interface and using the thickness of the stratum, in the sub-salt area, due to the shielding and attenuation of seismic energy by gypsum, the seismic data of the sub-salt strata often have a low main frequency and poor data quality, and cannot accurately track the seismic reflection iso-axis. In addition, due to the flexible characteristics of gypsum, the thickness of the overlying strata cannot accurately reflect the paleo-geomorphology distribution of the sub-salt strata. Therefore, the impression method and residual thickness method are not suitable for the restoration of sub-salt carbonate paleo-geomorphology.

[0004] Due to the limitations of data or methods, the existing paleo-geomorphology restoration methods have poor reliability and questionable authenticity when restoring carbonate paleo-geomorphology in sub-salt areas. Summary of the invention

[0005] The technical problem to be solved by the present invention is to address the deficiencies of the prior art and specifically provide a paleo-geomorphology restoration method, system, computer device and storage medium, as follows:

[0006] 1) In the first aspect, the present invention provides a method for restoring ancient landforms, and the specific technical scheme is as follows:

[0007] Establish a geomorphic restoration well-connected grid profile corresponding to the preset subsalt carbonate rock deepwater slope area, and determine the thickness distribution relationship between the upper granular carbonate rock and the lower deepwater carbonate rock in the preset subsalt carbonate rock deepwater slope area based on the basic data of the preset subsalt carbonate rock deepwater slope area;

[0008] According to the basic data of the pre-set subsalt carbonate deepwater slope area, specific data of the preferred seismic attributes are obtained, and based on the specific data of the preferred seismic attributes, a preferred seismic attribute map is constructed;

[0009] The thickness distribution relationship between the upper granular carbonate rock and the lower deep-water carbonate rock in the preset subsalt carbonate rock deep-water slope area is projected onto the preferred seismic attribute map to obtain the paleo-geomorphology of the preset subsalt carbonate rock deep-water slope area.

[0010] The beneficial effects of a paleo-geomorphology restoration method provided by the present invention are as follows:

[0011] It can realize the restoration of ancient landforms in areas where accurate interpretation of seismic horizons is impossible, thereby solving the problem of poor landform restoration effects in areas where the horizon interpretation is not accurate enough.

[0012] On the basis of the above scheme, a paleo-geomorphology restoration method of the present invention can also be improved as follows.

[0013] Further, the process of determining the preferred seismic attributes includes:

[0014] According to the actual thickness distribution relationship between the upper granular carbonate rock and the lower deep-water carbonate rock in the target pre-set subsalt carbonate rock deep-water slope area, a theoretical wedge forward model is designed;

[0015] According to the seismic forward modeling results of the target preset subsalt carbonate deepwater slope area, the correlation between the theoretical wedge forward model and the seismic attributes is established, and the seismic attributes with the highest correlation are determined as the preferred seismic attributes.

[0016] Furthermore, the basic data include: three-dimensional seismic data volume, conventional logging curves, geological stratification data and logging interpretation data.

[0017] Further, it also includes: based on the well logging interpretation data and the geological stratification data, using the synthetic record production method, performing horizon calibration on the three-dimensional seismic data body to obtain the seismic interpretation horizon;

[0018] The process of determining the thickness distribution relationship between the upper granular carbonate rock and the lower deepwater carbonate rock in a pre-determined subsalt carbonate rock deepwater slope area includes:

[0019] The seismic interpretation horizons are mapped on the geomorphic restoration well grid section, and the interface between the upper granular carbonate rock and the lower deep-water carbonate rock in the logging interpretation data is used as the reference plane. The horizon leveling method is used to determine the thickness distribution relationship between the upper granular carbonate rock and the lower deep-water carbonate rock in the preset sub-salt carbonate rock deep-water slope area.

[0020] 2) In the second aspect, the present invention also provides a paleo-geomorphology restoration system, and the specific technical solution is as follows:

[0021] It includes the establishment of determination module, construction module and paleo-geomorphology restoration module;

[0022] Establishing a determination module for: establishing a geomorphic restoration well grid profile corresponding to a preset subsalt carbonate rock deepwater slope area, and determining the thickness distribution relationship between the upper granular carbonate rock and the lower deepwater carbonate rock in the preset subsalt carbonate rock deepwater slope area based on the basic data of the preset subsalt carbonate rock deepwater slope area;

[0023] The construction module is used to: obtain specific data of preferred seismic attributes according to the preset basic data of the subsalt carbonate deepwater slope area, and construct a preferred seismic attribute map based on the specific data of the preferred seismic attributes;

[0024] The paleo-geomorphology restoration module is used to project the thickness distribution relationship between the upper granular carbonate rock and the lower deep-water carbonate rock in the preset subsalt carbonate rock deep-water slope area onto the preferred seismic attribute map to obtain the paleo-geomorphology of the preset subsalt carbonate rock deep-water slope area.

[0025] Based on the above scheme, the paleo-geomorphology restoration system of the present invention can also be improved as follows.

[0026] Furthermore, it also includes a preferred earthquake attribute determination module, which is used to:

[0027] According to the actual thickness distribution relationship between the upper granular carbonate rock and the lower deep-water carbonate rock in the target pre-set subsalt carbonate rock deep-water slope area, a theoretical wedge forward model is designed;

[0028] According to the seismic forward modeling results of the target preset subsalt carbonate deepwater slope area, the correlation between the theoretical wedge forward model and the seismic attributes is established, and the seismic attributes with the highest correlation are determined as the preferred seismic attributes.

[0029] Furthermore, the basic data include: three-dimensional seismic data volume, conventional logging curves, geological stratification data and logging interpretation data.

[0030] Furthermore, it also includes a layer calibration module, which is used to: perform layer calibration on the three-dimensional seismic data body according to the well logging interpretation data and the geological layering data by using the synthetic record production method to obtain the seismic interpretation layer;

[0031] The process of establishing a determination module to determine the thickness distribution relationship between the upper granular carbonate rock and the lower deepwater carbonate rock in a preset subsalt carbonate rock deepwater slope area includes:

[0032] The seismic interpretation horizons are mapped on the geomorphic restoration well grid section, and the interface between the upper granular carbonate rock and the lower deep-water carbonate rock in the logging interpretation data is used as the reference plane. The horizon leveling method is used to determine the thickness distribution relationship between the upper granular carbonate rock and the lower deep-water carbonate rock in the preset sub-salt carbonate rock deep-water slope area.

[0033] 3) In a third aspect, the present invention further provides a computer device, comprising a processor coupled to a memory, wherein the memory stores at least one computer program, and the at least one computer program is loaded and executed by the processor so that the computer device implements any one of the above-mentioned paleo-geomorphology restoration methods.

[0034] 4) In a fourth aspect, the present invention further provides a computer-readable storage medium, in which at least one computer program is stored, and the at least one computer program is loaded and executed by a processor so that a computer implements any of the above-mentioned paleo-geomorphology restoration methods.

[0035] It should be noted that the beneficial effects achieved by the technical solutions of the second to fourth aspects of the present invention and the corresponding possible implementation methods can be found in the above-mentioned technical effects of the first aspect and its corresponding possible implementation methods, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0037] Figure 1 A schematic diagram of a process of restoring ancient landforms according to an embodiment of the present invention;

[0038] Figure 2 Schematic diagram of the horizons for seismic interpretation;

[0039] Figure 3 It is the stratigraphic framework section;

[0040] Figure 4 Simulate profiles for seismic forward modeling;

[0041] Figure 5 is a schematic diagram of the fitting curve;

[0042] Figure 6 It is a three-dimensional sedimentary paleo-geomorphology map;

[0043] Figure 7 A schematic diagram of the structure of a paleo-geomorphology restoration system according to an embodiment of the present invention;

[0044] Figure 8 Schematic diagram of the structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0045] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0046] like Figure 1As shown, a paleo-geomorphology restoration method according to an embodiment of the present invention comprises the following steps:

[0047] S1. Establish a geomorphic restoration well-connected grid profile corresponding to a preset subsalt carbonate rock deepwater slope area, and determine the thickness distribution relationship between the upper granular carbonate rock and the lower deepwater carbonate rock in the preset subsalt carbonate rock deepwater slope area based on the basic data of the preset subsalt carbonate rock deepwater slope area;

[0048] Among them, basic data include: 3D seismic data, conventional logging curve geological layering data and logging interpretation data. Basic data can also include drilling and logging data, well trajectory data and layer interpretation data.

[0049] S2. According to the preset basic data of the subsalt carbonate deepwater slope area, specific data of the preferred seismic attributes are obtained, and based on the specific data of the preferred seismic attributes, a preferred seismic attribute map is constructed;

[0050] S3. Project the thickness distribution relationship between the upper granular carbonate rock and the lower deep-water carbonate rock in the preset subsalt carbonate rock deep-water slope area onto the preferred seismic attribute map to obtain the paleo-geomorphology of the preset subsalt carbonate rock deep-water slope area.

[0051] Among them, the preset subsalt carbonate deepwater slope area refers to: the subsalt carbonate deepwater slope area that needs to be restored of paleo-geomorphology, which can be set according to actual conditions.

[0052] A paleo-geomorphology restoration method according to an embodiment of the present invention can realize paleo-geomorphology restoration in areas where accurate interpretation of seismic horizons is not possible, thereby solving the problem of poor geomorphology restoration effects in areas where the horizon interpretation is not accurate enough.

[0053] Optionally, in the above technical solution, it also includes:

[0054] After obtaining the paleo-geomorphology of the preset subsalt carbonate rock deep-water slope area, the paleo-geomorphology of the preset subsalt carbonate rock deep-water slope area is visualized in three dimensions, such as Figure 6 shown.

[0055] Optionally, in the above technical solution, the process of determining the preferred seismic attribute includes:

[0056] S020. According to the actual thickness distribution relationship between the upper granular carbonate rock and the lower deep-water carbonate rock in the target preset subsalt carbonate rock deep-water slope area, a theoretical wedge forward model is designed. The model parameters of the theoretical wedge forward model are consistent with the parameters of the three-dimensional seismic data body. The parameters of the three-dimensional seismic data body are set according to the actual situation. The seismic forward simulation profile of the theoretical wedge forward model is as follows: Figure 4 shown.

[0057] Among them, the target preset subsalt carbonate deepwater slope area refers to: a preset subsalt carbonate deepwater slope area where actual survey has been carried out and the actual thickness distribution relationship between the upper layer of granular carbonate rock and the lower layer of deepwater carbonate rock has been obtained, which can be set according to actual conditions.

[0058] S021. Based on the seismic forward modeling results of the target preset subsalt carbonate deepwater slope area, the correlation between the theoretical wedge forward model and the seismic attributes is established, and the seismic attribute with the highest correlation is determined as the preferred seismic attribute.

[0059] The theoretical wedge forward model needs to be based on the actual drilling well-connected well profile of the target preset subsalt carbonate deepwater slope area, the model should be drawn according to the real data of drilling stratification, and the seismic forward velocity should be determined according to the real logging data. The forward modeling results need to be compared and tested with the actual seismic profile to ensure the real effect.

[0060] The specific explanation of S021 is as follows:

[0061] In the target preset subsalt carbonate deepwater slope area, there is a "filling and matching" effect when the upper granular carbonate rock and the lower deepwater carbonate rock are deposited. Therefore, the reef beach located in the high part of the paleo-geomorphology will grow and accumulate rapidly, resulting in a large deposition thickness of the upper granular carbonate rock and a small deposition thickness of the lower deepwater carbonate rock; in the low part of the paleo-geomorphology, the deposition thickness of the upper granular carbonate rock is small, and the deposition thickness of the lower deepwater carbonate rock is large. However, on the whole, in the target preset subsalt carbonate deepwater slope area, the sum of the thickness of the upper granular carbonate rock and the lower deepwater carbonate rock at each position does not change much and is basically equal, such as Figure 3 The stratigraphic framework section in is shown. Then:

[0062] Through the three-dimensional seismic data volume in the basic data of the pre-set subsalt carbonate deepwater slope area, a variety of seismic attributes can be obtained. Each seismic attribute has a corresponding attribute value at the interface between the upper granular carbonate rock and the lower deepwater carbonate rock. The attribute value of each well point is obtained, and the attribute value of any well point is linearly fitted with the thickness of the lower deepwater carbonate rock of the well to obtain a fitting curve. The correlation coefficient of the fitting curve is calculated, such as Figure 5 As shown, until the fitting curve corresponding to each well point is obtained, and then the correlation coefficient corresponding to each well point is obtained, the seismic attribute corresponding to the maximum correlation coefficient is determined as the preferred seismic attribute. Figure 5 In the figure, y=19.772x-1531.8 is a fitting curve, R 2 =0.777, R 2 It is the correlation coefficient of the fitting curve y=19.772x-1531.8, where x represents the thickness of the lower deep-water carbonate rock and y represents the attribute value of the seismic attribute passing the well point.

[0063] Among them, a variety of seismic attributes can be obtained by using the three-dimensional seismic data volume in the basic data of the pre-targeted subsalt carbonate deepwater slope area, including:

[0064] In the form of time windows, a variety of seismic attributes can be obtained from the three-dimensional seismic data volume in the basic data of the target preset subsalt carbonate deepwater slope area. The time window should well reflect the thickness relationship between the layer of granular carbonate and the underlying deepwater carbonate. Therefore, a single time window should include a peak or trough phase.

[0065] Optionally, in the above technical solution, it also includes:

[0066] According to the well logging interpretation data and geological stratification data, the layer position is calibrated on the 3D seismic data volume by using the synthetic record production method to obtain the seismic interpretation layer, such as Figure 2 shown.

[0067] The process of determining the thickness distribution relationship between the upper granular carbonate rock and the lower deepwater carbonate rock in a pre-determined subsalt carbonate rock deepwater slope area includes:

[0068] The seismic interpretation horizons are mapped on the geomorphic restoration well grid section, and the interface between the upper granular carbonate rock and the lower deep-water carbonate rock in the logging interpretation data is used as the reference plane. The horizon leveling method is used to determine the thickness distribution relationship between the upper granular carbonate rock and the lower deep-water carbonate rock in the preset sub-salt carbonate rock deep-water slope area.

[0069] In the above embodiments, although the steps are numbered S1, S2, etc., these are only specific embodiments given by the present invention. Those skilled in the art may adjust the execution order of S1, S2, etc. according to actual conditions, which is also within the protection scope of the present invention. It can be understood that in some embodiments, some or all of the above embodiments may be included.

[0070] like Figure 7 As shown, a paleo-geomorphology restoration system 200 according to an embodiment of the present invention includes an establishment and determination module 201, a construction module 202 and a paleo-geomorphology restoration module 203;

[0071] The establishment and determination module 201 is used to: establish a geomorphic restoration well grid profile corresponding to a preset subsalt carbonate rock deepwater slope area, and determine the thickness distribution relationship between the upper granular carbonate rock and the lower deepwater carbonate rock in the preset subsalt carbonate rock deepwater slope area based on the basic data of the preset subsalt carbonate rock deepwater slope area;

[0072] The construction module 202 is used to obtain specific data of the preferred seismic attributes according to the preset basic data of the subsalt carbonate deepwater slope area, and construct a preferred seismic attribute map based on the specific data of the preferred seismic attributes;

[0073] The paleo-geomorphology restoration module 203 is used to project the thickness distribution relationship between the upper granular carbonate rock and the lower deep-water carbonate rock in the preset subsalt carbonate rock deep-water slope area onto the preferred seismic attribute map to obtain the paleo-geomorphology of the preset subsalt carbonate rock deep-water slope area.

[0074] Optionally, in the above technical solution, a preferred earthquake attribute determination module is further included, and the preferred earthquake attribute determination module is used to:

[0075] According to the actual thickness distribution relationship between the upper granular carbonate rock and the lower deep-water carbonate rock in the target pre-set subsalt carbonate rock deep-water slope area, a theoretical wedge forward model is designed;

[0076] According to the seismic forward modeling results of the target preset subsalt carbonate deepwater slope area, the correlation between the theoretical wedge forward model and the seismic attributes is established, and the seismic attributes with the highest correlation are determined as the preferred seismic attributes.

[0077] Optionally, in the above technical solution, the basic data includes: three-dimensional seismic data volume, conventional well logging curves, geological stratification data and well logging interpretation data.

[0078] Optionally, the above technical solution further includes a layer calibration module, which is used to: perform layer calibration on the three-dimensional seismic data volume according to the well logging interpretation data and the geological stratification data by using a synthetic record production method to obtain the seismic interpretation layer;

[0079] The process of establishing the determination module 201 to determine the thickness distribution relationship between the upper granular carbonate rock and the lower deepwater carbonate rock in the preset subsalt carbonate rock deepwater slope area includes:

[0080] The seismic interpretation horizons are mapped on the geomorphic restoration well grid section, and the interface between the upper granular carbonate rock and the lower deep-water carbonate rock in the logging interpretation data is used as the reference plane. The horizon leveling method is used to determine the thickness distribution relationship between the upper granular carbonate rock and the lower deep-water carbonate rock in the preset sub-salt carbonate rock deep-water slope area.

[0081] It should be noted that the beneficial effects of the paleo-geomorphology restoration system 200 provided in the above embodiment are the same as the beneficial effects of the above paleo-geomorphology restoration method, which will not be described in detail here. In addition, when the system provided in the above embodiment realizes its functions, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the system can be divided into different functional modules according to actual conditions to complete all or part of the functions described above. In addition, the system and method embodiments provided in the above embodiment belong to the same concept, and the specific implementation process is detailed in the method embodiment, which will not be described in detail here.

[0082] like Figure 8 As shown, a computer device 300 according to an embodiment of the present invention includes a processor 320, the processor 320 is coupled to a memory 310, and the memory 310 stores at least one computer program 330, and the at least one computer program 330 is loaded and executed by the processor 320, so that the computer device 300 implements any of the above-mentioned paleo-geomorphology restoration methods, specifically:

[0083] The computer device 300 may have relatively large differences due to different configurations or performances, and may include one or more processors 320 (Central Processing Units, CPU) and one or more memories 310, wherein at least one computer program 330 is stored in the one or more memories 310, and the at least one computer program 330 is loaded and executed by the one or more processors 320, so that the computer device 300 implements any of the paleo-geomorphology restoration methods provided in the above embodiments. Of course, the computer device 300 may also have components such as a wired or wireless network interface, a keyboard, and an input and output interface for input and output, and the computer device 300 may also include other components for implementing device functions, which will not be described in detail here.

[0084] A computer-readable storage medium according to an embodiment of the present invention stores at least one computer program, and the at least one computer program is loaded and executed by a processor so that a computer implements any one of the above-mentioned paleo-geomorphology restoration methods.

[0085] Optionally, the computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a compact disc (CD-ROM), a magnetic tape, a floppy disk, an optical data storage device, and the like.

[0086] In an exemplary embodiment, a computer program product or a computer program is also provided, the computer program product or the computer program comprising computer instructions, the computer instructions being stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device performs any of the above-mentioned paleo-geomorphology restoration methods.

[0087] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects and represent the definition of a specific order or sequence. The order of use of similar objects can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than the order shown or described.

[0088] Those skilled in the art know that the present invention can be implemented as a system, method or computer program product. Therefore, the present invention can be specifically implemented in the following forms, namely: it can be complete hardware, it can be complete software (including firmware, resident software, microcode, etc.), or it can be a combination of hardware and software, which is generally referred to as "circuit", "module" or "system" herein. In addition, in some embodiments, the present invention can also be implemented in the form of a computer program product in one or more computer-readable media, and the computer-readable medium contains computer-readable program code.

[0089] Any combination of one or more computer-readable media can be used. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media (a non-exhaustive list) include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present invention, a computer-readable storage medium can be any tangible medium containing or storing a program, which can be used by an instruction execution system, device or device or used in combination with it.

[0090] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A method for restoring ancient landforms, characterized in that: include: Establishing a geomorphic restoration well-connected grid profile corresponding to a preset subsalt carbonate rock deepwater slope area, and determining the thickness distribution relationship between the upper granular carbonate rock and the lower deepwater carbonate rock in the preset subsalt carbonate rock deepwater slope area based on the basic data of the preset subsalt carbonate rock deepwater slope area; According to the basic data of the preset subsalt carbonate deepwater slope area, specific data of preferred seismic attributes are obtained, and based on the specific data of the preferred seismic attributes, a preferred seismic attribute map is constructed; The thickness distribution relationship between the upper granular carbonate rock and the lower deep-water carbonate rock in the preset subsalt carbonate rock deep-water slope area is projected onto the preferred seismic attribute map to obtain the paleo-geomorphology of the preset subsalt carbonate rock deep-water slope area.

2. A method for restoring ancient landforms according to claim 1, characterized in that: The process of determining the preferred seismic attributes comprises: According to the actual thickness distribution relationship between the upper granular carbonate rock and the lower deep-water carbonate rock in the target pre-set subsalt carbonate rock deep-water slope area, a theoretical wedge forward model is designed; According to the seismic forward modeling results of the target preset subsalt carbonate deepwater slope area, the correlation between the theoretical wedge forward model and the seismic attributes is established, and the seismic attribute with the highest correlation is determined as the preferred seismic attribute.

3. A method for restoring ancient landforms according to claim 2, characterized in that: Basic data include: 3D seismic data, conventional well logging curves, geological stratification data and well logging interpretation data.

4. A method for restoring ancient landforms according to claim 3, characterized in that: Also includes: According to the well logging interpretation data and the geological stratification data, the horizon is calibrated on the three-dimensional seismic data volume by using a synthetic record production method to obtain a seismic interpretation horizon; The process of determining the thickness distribution relationship between the upper granular carbonate rock and the lower deepwater carbonate rock in the preset subsalt carbonate rock deepwater slope area includes: The seismic interpretation horizon is mapped on the geomorphic restoration well grid section, and the interface between the upper granular carbonate rock and the lower deep-water carbonate rock in the logging interpretation data is used as the reference plane. The horizon leveling method is used to determine the thickness distribution relationship between the upper granular carbonate rock and the lower deep-water carbonate rock in the preset sub-salt carbonate rock deep-water slope area.

5. A paleo-geomorphology restoration system, characterized in that: It includes the establishment of determination module, construction module and paleo-geomorphology restoration module; The establishing and determining module is used to: establish a geomorphic restoration well-connecting grid profile corresponding to a preset subsalt carbonate rock deepwater slope area, and determine the thickness distribution relationship between the upper granular carbonate rock and the lower deepwater carbonate rock in the preset subsalt carbonate rock deepwater slope area based on the basic data of the preset subsalt carbonate rock deepwater slope area; The construction module is used to obtain specific data of preferred seismic attributes according to the basic data of the preset subsalt carbonate deepwater slope area, and construct a preferred seismic attribute map based on the specific data of the preferred seismic attributes; The paleo-geomorphology restoration module is used to project the thickness distribution relationship between the upper granular carbonate rock and the lower deep-water carbonate rock in the preset sub-salt carbonate rock deep-water slope area onto the preferred seismic attribute map to obtain the paleo-geomorphology of the preset sub-salt carbonate rock deep-water slope area.

6. A paleo-geomorphology restoration system according to claim 5, characterized in that: The preferred earthquake attribute determination module is further included, and the preferred earthquake attribute determination module is used to: According to the actual thickness distribution relationship between the upper granular carbonate rock and the lower deep-water carbonate rock in the target pre-set subsalt carbonate rock deep-water slope area, a theoretical wedge forward model is designed; According to the seismic forward modeling results of the target preset subsalt carbonate deepwater slope area, the correlation between the theoretical wedge forward model and the seismic attributes is established, and the seismic attribute with the highest correlation is determined as the preferred seismic attribute.

7. A paleo-geomorphology restoration system according to claim 6, characterized in that: Basic data include: 3D seismic data, conventional well logging curves, geological stratification data and well logging interpretation data.

8. A paleo-geomorphology restoration system according to claim 7, characterized in that: It also includes a layer calibration module, which is used to: perform layer calibration on the three-dimensional seismic data body according to the well logging interpretation data and the geological layering data by using a synthetic record production method to obtain a seismic interpretation layer; The process of establishing a determination module to determine the thickness distribution relationship between the upper granular carbonate rock and the lower deepwater carbonate rock in the preset subsalt carbonate rock deepwater slope area includes: The seismic interpretation horizon is mapped on the geomorphic restoration well grid section, and the interface between the upper granular carbonate rock and the lower deep-water carbonate rock in the logging interpretation data is used as the reference plane. The horizon leveling method is used to determine the thickness distribution relationship between the upper granular carbonate rock and the lower deep-water carbonate rock in the preset sub-salt carbonate rock deep-water slope area.

9. A computer device, characterized in that: The computer device includes a processor, the processor is coupled to a memory, at least one computer program is stored in the memory, and the at least one computer program is loaded and executed by the processor so that the computer device implements a paleo-geomorphology restoration method as described in any one of claims 1 to 4.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores at least one computer program, and the at least one computer program is loaded and executed by a processor so that a computer implements a paleo-geomorphology restoration method as claimed in any one of claims 1 to 4.

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