Method, device and equipment for determining stratum denudation data and medium

Abstract

The embodiment of the invention discloses a stratum denudation data determination method and device, equipment and a medium. The method comprises the following steps: determining a target layer, a Shanghai generic surface and a Shanghai generic surface of which stratum denudation data needs to be calculated; wherein the upper marine flooding surface is located above the top surface of the target layer and closest to the top surface of the target layer, and the lower marine flooding surface is located below the bottom surface of the target layer and closest to the bottom surface of the target layer; determining denudation points according to the target layer and the underlying stratum; wherein the underlying stratum is a stratum located between the bottom surface of a target stratum and a lower sea flooding surface; and determining the stratum denudation amount according to the thickness between an upper line extending upwards in the stratum direction from the denudation point and the bottom surface of the target stratum. According to the scheme, the stratum denudation amount can be determined more accurately and quickly according to the stratum characteristics and the seismic data which are easy to obtain, higher practicability is achieved, and basic data are provided for later-stage structural analysis, hydrocarbon source rock evolution, oil and gas accumulation condition analysis and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of petroleum engineering, and in particular to a method and device for determining stratum denudation data, equipment and a medium. BACKGROUND

[0002] The development and evolution of a paleo-uplift controls the distribution and adjustment direction of oil and gas, and large-scale traps are usually developed in the paleo-uplift and its periphery. The paleo-uplift usually experiences long-term stratum denudation during the uplift period. The greater the denudation amount is, the stronger the uplift amplitude of the paleo-uplift is, and the longer the uplift period is. Meanwhile, the denudation amount is also an important parameter for calculating the stratum burial history and the hydrocarbon generation history of source rocks. However, the calculation of the stratum denudation amount has always been a difficult problem, and there is a lack of effective methods and means.

[0003] At present, the methods for analyzing the denudation amount of a paleo-uplift mainly include: (1) qualitative estimation by analyzing unconformity relationships and structural patterns of upper and lower strata; (2) recovery by the sedimentation rate ratio method; (3) recovery by the inversion correction method of apatite fission track and vitrinite reflectance; and (4) recovery of denudation by the paleo-temperature scale inversion method. The above methods can qualitatively or quantitatively recover the stratum denudation amount to some extent, but the limitation of data sources is obvious, and there is a lack of wide operability and practicality. SUMMARY

[0004] The embodiments of the present application provide a method and device for determining stratum denudation data, and equipment and a medium, to solve the problem that the determination of the stratum denudation amount is obviously limited by data sources, and lacks wide operability and practicality.

[0005] According to an aspect of the present application, a method for determining stratum denudation data is provided, which comprises the following steps.

[0006] determining a target layer, an upper marine flooding surface and a lower marine flooding surface for which stratum denudation data needs to be calculated; wherein the upper marine flooding surface is the marine flooding surface closest to the top surface of the target layer, and the lower marine flooding surface is the marine flooding surface closest to the bottom surface of the target layer;

[0007] determining a denudation point according to the target layer and an underlying stratum; wherein the underlying stratum is a stratum located between the bottom surface of the target layer and the lower marine flooding surface;

[0008] determining a stratum denudation amount according to the thickness between an upper extension line extending from the denudation point in the stratum direction and the bottom surface of the target layer.

[0009] According to an aspect of the present application, a device for determining stratum denudation data is provided, which comprises the following components.

[0010] The stratum determining module is configured to determine a target stratum, an upper marine flooding surface and a lower marine flooding surface for which stratum erosion data is to be calculated; the upper marine flooding surface is the marine flooding surface closest to the top surface of the target stratum, and the lower marine flooding surface is the marine flooding surface closest to the bottom surface of the target stratum;

[0011] The erosion point determining module is configured to determine an erosion point according to the target stratum and an underlying stratum; the underlying stratum is a stratum between the bottom surface of the target stratum and the lower marine flooding surface.

[0012] The stratum erosion amount determining module is configured to determine a stratum erosion amount according to the thickness between an upper extension line extending upwards from the erosion point along the stratum and the bottom surface of the target stratum.

[0013] According to another aspect of the present application, an electronic device is provided, which comprises:

[0014] at least one processor; and

[0015] a memory in data processing connection with the at least one processor; wherein

[0016] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to execute the method for determining stratum erosion data according to any one of the embodiments of the present application.

[0017] According to another aspect of the present application, a computer readable storage medium is provided, which stores computer instructions for enabling a processor to implement the method for determining stratum erosion data according to any one of the embodiments of the present application when executed by the processor.

[0018] The technical scheme of the embodiments of the present application determines a target stratum, an upper marine flooding surface and a lower marine flooding surface for which stratum erosion data is to be calculated; the upper marine flooding surface is the marine flooding surface closest to the top surface of the target stratum, and the lower marine flooding surface is the marine flooding surface closest to the bottom surface of the target stratum; an erosion point is determined according to the target stratum and an underlying stratum; the underlying stratum is a stratum between the bottom surface of the target stratum and the lower marine flooding surface; and a stratum erosion amount is determined according to the thickness between an upper extension line extending upwards from the erosion point along the stratum and the bottom surface of the target stratum. The above scheme can more accurately and quickly determine a stratum erosion amount according to stratum characteristics and seismic data which are easy to obtain, has stronger practicability, and provides basic data for later structural analysis, hydrocarbon source rock evolution, oil and gas accumulation condition analysis, etc.

[0019] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the application, nor to limit the scope of the application. Other features of the application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 A flow chart of a method for determining stratum denudation data provided by an embodiment of the application;

[0022] Figure 2 A seismic horizon schematic diagram provided by an embodiment of the application;

[0023] Figure 3 A target layer bottom surface flattening schematic diagram provided by an embodiment of the application;

[0024] Figure 4 A flow chart of a method for determining stratum denudation data provided by another embodiment of the application;

[0025] Figure 5 A Shanghai general surface flattening schematic diagram provided by another embodiment of the application;

[0026] Figure 6 A flow chart of a specific implementation process provided by an embodiment of the application;

[0027] Figure 7 A structural schematic diagram of a device for determining stratum denudation data provided by an embodiment of the application;

[0028] Figure 8 A structural schematic diagram of an electronic device provided by an embodiment of the application. DETAILED DESCRIPTION

[0029] In order to make the person skilled in the art better understand the application scheme, the technical solutions in the embodiments of the application will be described clearly and completely in the following with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only some embodiments of the application, not all. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor should be within the scope of protection of the application.

[0030] It should be noted that the terms "first", "second", "third", "fourth", "actual", "preset" and the like in the description and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0031] Figure 1 A flowchart of a method for determining stratum denudation data provided by an embodiment of the present application, the embodiment of the present application can be applicable to the case of determining the denudation amount of a stratum. The method can be executed by a stratum denudation data determination device, which can be realized in the form of hardware and / or software, and can be configured in an electronic device. As shown in Figure 1 , the method comprises:

[0032] S110, determining a target layer, an upper marine flooding surface and a lower marine flooding surface for which stratum denudation data needs to be calculated; wherein the upper marine flooding surface is the marine flooding surface closest to the top surface of the target layer above the top surface of the target layer, and the lower marine flooding surface is the marine flooding surface closest to the bottom surface of the target layer below the bottom surface of the target layer.

[0033] Illustratively, the stratum for which stratum denudation data needs to be determined is taken as the target layer, and the stratum for which stratum denudation data needs to be determined is the stratum in which a paleo-uplift exists. After the target layer is determined, the upper marine flooding surface is determined above the top surface of the target layer, and the determination principle is the center interface of the stratum closest to the top surface of the target layer and having uniform thickness. The lower marine flooding surface is determined below the bottom surface of the target layer, and the determination principle is the center interface of the stratum closest to the bottom surface of the target layer and having uniform thickness. Illustratively, as shown in Figure 2 , wherein H corresponds to the bottom surface of the target layer, S1 is the upper marine flooding surface above the top surface of the target layer, and the stratum between S1 and H is the target layer. S2 is the lower marine flooding surface below the bottom surface of the target layer.

[0034] S120, determining a denudation point according to the target layer and an underlying stratum; wherein the underlying stratum is the stratum between the bottom surface of the target layer and the lower marine flooding surface.

[0035] , the stratum between the target layer and the lower marine flooding surface is the underlying stratum, as shown in Figure 2As shown, the stratum between the bottom surface H of the target layer and the lower marine flooding surface S2 is the underlying stratum.

[0036] For example, the denudation point can reflect the critical point of denudation on the bottom surface of the target layer. The denudation point can be determined according to the target layer and the underlying stratum between the target layer and the lower marine flooding surface. As shown in Figure 3 As shown, the bottom surface of the target layer can be first flattened. The denudation point can be determined according to the contact relationship between the flattened bottom surface of the target layer and the underlying stratum. When the underlying stratum and the bottom surface of the target layer are in an intersecting state, the greater the angle between the underlying stratum and the bottom surface of the target layer, the more serious the denudation. If the underlying stratum is parallel to the bottom surface of the target layer, the paleogeomorphology during the deposition period is relatively flat, and the target layer is not denuded.

[0037] In S130, the stratum denudation amount is determined according to the thickness between the upper extension line extending from the denudation point in the stratum direction and the bottom surface of the target layer.

[0038] For example, the part above the bottom surface of the target layer is the part with denudation. The upper extension line can be determined by extending from the denudation point line in the stratum direction. The thickness between the upper extension line and the bottom surface of the target layer is taken as the stratum denudation amount. In the process of determining the upper extension line, the extension in the stratum direction is the extension along the trend of the same stratum, that is, the extension in the left-to-right or right-to-left direction in Figure 3 As shown in Figure 3 The upper extension line H2 can be obtained by extending from the denudation point in the right-to-left direction above the bottom surface of the target layer, that is, Figure 3 The thickness between the upper extension line H2 and the bottom surface H of the target layer is taken as the stratum denudation amount. Figure 3 H1 in the above scheme is the lower extension line obtained by extending downward in the stratum direction. The above scheme can quickly and accurately determine the stratum denudation amount according to the characteristics of the stratum, is not limited by the data source, and has high practicability.

[0039] The technical scheme of the embodiment of the present application determines the target layer, the upper marine flooding surface and the lower marine flooding surface for which the stratum denudation data needs to be calculated. The upper marine flooding surface is the marine flooding surface closest to the top surface of the target layer above the top surface of the target layer. The lower marine flooding surface is the marine flooding surface closest to the bottom surface of the target layer below the bottom surface of the target layer. The denudation point is determined according to the target layer and the underlying stratum. The underlying stratum is the stratum between the bottom surface of the target layer and the lower marine flooding surface. The stratum denudation amount is determined according to the thickness between the upper extension line extending from the denudation point in the stratum direction and the bottom surface of the target layer. The above scheme can more accurately and quickly determine the stratum denudation amount according to the easily obtained stratum characteristics and seismic data, has stronger practicability, and provides basic data for later structural analysis, hydrocarbon source rock evolution, and oil and gas accumulation condition analysis.

[0040] Figure 4 A flow chart of a method for determining stratum erosion data according to another embodiment of the present application is provided, which is optimized based on the above-mentioned embodiment. The solutions not described in detail in the embodiment of the present application are described in the above-mentioned embodiment. As shown in the figure, the method according to the embodiment of the present application specifically comprises the following steps: Figure 4

[0041] S210, determining a target layer, an upper sea flooding surface and a lower sea flooding surface for which stratum erosion data needs to be calculated; wherein the upper sea flooding surface is the sea flooding surface closest to the top surface of the target layer, and the lower sea flooding surface is the sea flooding surface closest to the bottom surface of the target layer.

[0042] S220, flattening the bottom surface of the target layer and determining an underlying stratum intersecting with the bottom surface of the target layer.

[0043] S230, taking the intersection point of the underlying stratum and the bottom surface of the target layer as the erosion point.

[0044] For example, as shown in the figure, the target layer can be flattened, and an underlying stratum intersecting with the bottom surface of the target layer can be determined in the underlying stratum. Figure 3 In the figure, the black inclined underlying stratum closest to the bottom surface of the target layer intersects with the bottom surface of the target layer, and the intersection point of the underlying stratum and the bottom surface of the target layer can be taken as the erosion point. Figure 3

[0045] S240, extending downward along the underlying stratum from the erosion point to obtain a lower edge line, and determining the thickness between the erosion point and the lower sea flooding surface.

[0046] For example, as shown in the figure, the lower edge line H1 can be obtained by extending downward along the trend of the underlying stratum from the erosion point, and the thickness between the lower edge line and the lower sea flooding surface S2 can be determined. Figure 3 In the figure, the thickness between H1 and S2. Figure 3

[0047] S250, extending upward along the stratum direction from the erosion point to obtain an upper edge line according to the thickness based on the principle of equal thickness.

[0048] For example, the upper edge line H2 can be obtained by extending upward along the stratum direction from the erosion point according to the thickness between H1 and S2, as shown in the figure. Figure 3

[0049] In the embodiment of the present application, extending upward along the stratum direction from the erosion point to obtain an upper edge line according to the thickness based on the principle of equal thickness comprises: ​​​​

[0050] extending from the erosion point upward along the stratum direction, so that the thickness between the upper edge line and the lower flooding surface is consistent with the thickness between the lower edge line and the lower flooding surface.

[0051] For example, in the process of determining the upper edge line, the erosion point can be taken as a starting point to extend upward along the stratum direction, that is, in the direction of the arrow in Figure 3 extending upward and leftward from the erosion point along the direction of the arrow in FIG. 6, so that the thickness between the upper edge line and the lower flooding surface is consistent with the thickness between the lower edge line and the lower flooding surface, that is, based on the principle of equal thickness. As shown in Figure 3 in the process of extending to determine the upper edge line, the thickness between H2 and S2 is consistent with the thickness between H1 and S2.

[0052] S260, taking the thickness between the upper edge line and the bottom surface of the target layer as the stratum erosion amount.

[0053] The embodiment of the present application provides a method for determining stratum erosion data. The bottom surface of a target layer is flattened, and an underlying stratum intersecting with the bottom surface of the target layer is determined. An intersection point of the underlying stratum and the bottom surface of the target layer is taken as an erosion point. A lower edge line is obtained by extending downward from the erosion point along the underlying stratum, and a thickness between the erosion point and a lower flooding surface is determined. An upper edge line is obtained by extending upward from the erosion point along the stratum direction based on the principle of equal thickness according to the thickness. The thickness between the upper edge line and the bottom surface of the target layer is taken as a stratum erosion amount. The above scheme can accurately and conveniently determine the erosion point according to the stratum characteristics, and determine the erosion range upward and downward from the erosion point, and then accurately determine the stratum erosion amount. The method is convenient and accurate, and is not easily affected and limited by data sources.

[0054] In the embodiment of the present application, the method further comprises:

[0055] The lower flooding surface is flattened. If the thickness between the lower flooding surface and the bottom surface of the target layer remains equal, the thickness between the lower flooding surface and the bottom surface of the target layer is taken as a maximum erosion amount.

[0056] The maximum erosion amount is taken as a constraint to evaluate the accuracy of the stratum erosion amount.

[0057] For example, the maximum erosion amount, i.e., the erosion range, can be determined based on stratigraphic characteristics. This allows for the evaluation of the accuracy of the stratigraphic erosion amount determined in the above embodiments, determining whether the deviation is significant and avoiding the misclassification of a large erosion amount as accurate. Specifically, the Shanghai flooding surface can be flattened. If the thickness between the Shanghai flooding surface and the bottom surface of the target layer remains constant, it indicates that the underlying paleo-uplift activity ceased before the deposition of the Shanghai flooding surface. In other words, the target layer is no longer eroded above the Shanghai flooding surface. Therefore, the maximum erosion amount can be determined as the thickness between the Shanghai flooding surface and the bottom surface of the target layer. Figure 5 As shown, the Shanghai flooding surface S1 is flattened, and the thickness between the bottom surface H of the target layer and the Shanghai flooding surface S1 is calculated as the maximum erosion amount. The above scheme can determine the maximum erosion amount based on the stratigraphic characteristics, thereby assessing the accuracy of the stratigraphic erosion amount determined in the above embodiments, improving the confidence of the finally determined stratigraphic erosion amount, and avoiding the adoption of stratigraphic erosion amounts with large errors.

[0058] In this embodiment of the application, the method further includes:

[0059] If the amount of erosion exceeds the maximum value of the erosion amount, then the accuracy assessment of the amount of erosion is deemed unsuccessful.

[0060] The erosion point is re-determined based on the target layer and the underlying strata; wherein the underlying strata are the strata located between the bottom surface of the target layer and the lower sea flooding surface, and the new erosion amount is determined based on the thickness between the upper edge line extending upward from the erosion point along the stratum direction and the bottom surface of the target layer.

[0061] For example, the amount of erosion can be compared with the maximum erosion value. If the amount of erosion is less than the maximum value, the amount of erosion is determined to be accurate. If the amount of erosion is greater than the maximum value, the amount of erosion is determined to be inaccurate, meaning the accuracy assessment of the erosion is unsuccessful, and the amount of erosion needs to be re-determined. Specifically, the re-determination of the amount of erosion can still be performed according to the process described in the above embodiment, that is, re-determining the erosion point based on the target layer and the underlying strata. The underlying strata are those located between the bottom surface of the target layer and the lower flooding surface, and the new amount of erosion is determined based on the thickness between the upper edge extending upwards from the erosion point along the stratum direction and the bottom surface of the target layer. By determining the new amount of erosion, the amount of erosion can be updated, thereby determining a more accurate amount of erosion, until the amount of erosion is less than or equal to the maximum value.

[0062] In this embodiment of the application, the method further includes:

[0063] Based on drilling and logging data, the bottom surface of the target layer and the Shanghai flooding surface are marked and interpreted on the seismic profile to determine the stratigraphic names of the bottom surface of the target layer and the Shanghai flooding surface.

[0064] If the thickness between the Shanghai flooding surface and the bottom surface of the target layer remains equal, the deposition time of the bottom surface of the target layer is determined according to the stratigraphic name of the bottom surface of the target layer, and is used as the start time of stratigraphic erosion.

[0065] The deposition time of the Shanghai flooding surface is determined based on the stratigraphic name of the surface, and is used as the termination time of stratigraphic erosion.

[0066] For example, the erosion period can be determined based on stratigraphic characteristics, including the erosion start time, erosion end time, and erosion duration. Specifically, after identifying the bottom surface of the target layer, the Shanghai flooding surface, and the lower sea flooding surface, the bottom surface of the target layer and the Shanghai flooding surface can be marked and interpreted on seismic profiles based on drilling and logging data to determine their stratigraphic names. If the thickness between the Shanghai flooding surface and the bottom surface of the target layer remains constant, it indicates that the activity of the underlying paleo-uplift ended before the deposition of the Shanghai flooding surface, meaning the target layer was no longer eroded above the Shanghai flooding surface. This implies that erosion began at the deposition time of the bottom surface of the target layer and ended at the deposition time of the Shanghai flooding surface. The deposition time of the bottom surface of the target layer can be used as the erosion start time, and the deposition time of the Shanghai flooding surface can be used as the erosion end time. Specifically, based on prior geological knowledge, the deposition time of the bottom surface of the target layer corresponding to its name can be determined as the erosion start time, and the deposition time of the Shanghai flooding surface corresponding to its name can be determined as the erosion end time. The above scheme can accurately and conveniently determine the erosion period based on stratigraphic characteristics, thereby providing basic data for subsequent structural analysis, source rock evolution, and hydrocarbon accumulation condition analysis.

[0067] Figure 6 This is a flowchart illustrating a specific implementation process of an embodiment of this application, such as... Figure 6 As shown, based on the sedimentary background and stratigraphic analysis, the bottom surface of the target layer, the Shanghai flooding surface, and the lower sea flooding surface were determined. Drilling, logging, and seismic data for each stratum were also determined. Based on these data, the seismic horizons of the bottom surface of the target layer, the Shanghai flooding surface, and the lower sea flooding surface were identified. Based on these seismic horizons, the erosion points and erosion extent were determined, and thus the amount of stratigraphic erosion was calculated. The erosion period was determined based on the depositional time of the seismic horizons, the starting horizon of the erosion, and the ending horizon of the erosion.

[0068] Figure 7 This is a schematic diagram of a device for determining stratigraphic erosion data provided in an embodiment of this application. This device can execute the method for determining stratigraphic erosion data provided in any embodiment of this application, and possesses the corresponding functional modules and beneficial effects for executing the method.Figure 7 As shown, the device includes:

[0069] The stratigraphic determination module 310 is used to determine the target layer, the Shanghai flooding surface, and the lower sea flooding surface for which stratigraphic erosion data needs to be calculated; wherein, the Shanghai flooding surface is the sea flooding surface located above the top surface of the target layer and closest to the top surface of the target layer, and the lower sea flooding surface is the sea flooding surface located below the bottom surface of the target layer and closest to the bottom surface of the target layer.

[0070] The erosion point determination module 320 is used to determine the erosion point based on the target layer and the underlying strata; wherein the underlying strata are the strata located between the bottom surface of the target layer and the lower sea flooding surface;

[0071] The erosion amount determination module 330 is used to determine the erosion amount based on the thickness between the upper edge line extending upward from the erosion point along the stratum direction and the bottom surface of the target layer.

[0072] In this embodiment of the application, the erosion point determination module 320 determines the erosion point based on the target layer and the underlying strata; wherein, the underlying strata are the strata located between the bottom surface of the target layer and the underlying flooding surface, including:

[0073] Flatten the bottom surface of the target layer and determine the underlying strata that intersect with the bottom surface of the target layer;

[0074] The point where the underlying stratum intersects with the bottom surface of the target stratum is taken as the erosion point.

[0075] In this embodiment of the application, the formation erosion determination module 330 determines the formation erosion amount based on the thickness between the upper edge line extending upward from the erosion point along the formation direction and the bottom surface of the target layer, including:

[0076] A lower edge line is obtained by extending downward from the erosion point along the underlying strata, and the thickness between the erosion point and the underlying sea surface is determined.

[0077] Based on the principle of equal thickness, the upper edge line is obtained by extending upwards along the stratum from the erosion point according to the thickness;

[0078] The thickness between the upper edge line and the bottom surface of the target layer is taken as the amount of erosion.

[0079] In this embodiment of the application, the formation erosion determination module 330 extends an upper edge line upward along the formation direction from the erosion point based on the thickness principle according to the thickness, including:

[0080] Extending upwards along the stratum from the erosion point, the thickness between the upper edge and the lower seafloor is the same as the thickness between the lower edge and the lower seafloor.

[0081] In this embodiment of the application, the device further includes:

[0082] The module for determining the maximum erosion amount is used to flatten the Shanghai flooding surface. If the thickness between the Shanghai flooding surface and the bottom surface of the target layer remains the same, then the thickness between the Shanghai flooding surface and the bottom surface of the target layer is taken as the maximum erosion amount.

[0083] An evaluation module is used to evaluate the accuracy of the formation erosion amount using the maximum erosion amount as a constraint.

[0084] In this embodiment of the application, the device further includes:

[0085] The comparison module is used to determine that the accuracy assessment of the formation erosion amount fails if the erosion amount exceeds the maximum value of the erosion amount.

[0086] The re-determination module is used to re-determine the erosion point based on the target layer and the underlying strata; wherein the underlying strata are the strata located between the bottom surface of the target layer and the lower sea flooding surface, and the new erosion amount is determined based on the thickness between the upper edge line extending upward from the erosion point along the stratum direction and the bottom surface of the target layer.

[0087] In this embodiment of the application, the device further includes:

[0088] The stratigraphic name determination module is used to mark and interpret the bottom surface of the target layer and the Shanghai flooding surface on the seismic profile based on drilling data and well logging data, and to determine the stratigraphic names of the bottom surface of the target layer and the Shanghai flooding surface.

[0089] The erosion initiation time determination module is used to determine the deposition time of the bottom surface of the target layer based on the stratigraphic name of the bottom surface of the target layer if the thickness between the Shanghai flooding surface and the bottom surface of the target layer remains equal, and use this as the stratigraphic erosion initiation time.

[0090] The erosion termination time determination module is used to determine the deposition time of the Shanghai flooding surface based on the stratigraphic name of the Shanghai flooding surface, and use it as the stratigraphic erosion termination time.

[0091] The apparatus for determining stratigraphic erosion data provided in this application can execute the method for determining stratigraphic erosion data provided in any embodiment of this application, and has the corresponding functional modules and beneficial effects of the method.

[0092] Figure 8A schematic diagram of the structure of an electronic device 10 that can be used to implement embodiments of this application is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, 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 (such as 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 application described and / or claimed herein.

[0093] like Figure 8 As 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, connected to the at least one processor 11 for data processing. 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 into the RAM 13 from storage unit 18. The RAM 13 can 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.

[0094] 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 monitors, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and data processing unit 19, such as network card, modem, wireless data processing transceiver, etc. Data processing 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.

[0095] 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 methods for determining stratigraphic erosion data.

[0096] In some embodiments, the method for determining formation erosion data 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 data processing unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the method for determining formation erosion data described above may be performed. Alternatively, in other embodiments, processor 11 may be configured to perform the method for determining formation erosion data by any other suitable means (e.g., by means of firmware).

[0097] 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), systems-on-a-chip (SoCs), payload-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.

[0098] Computer programs used to implement the methods of this application 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 means of determining stratigraphic erosion data, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The computer programs may be executed entirely on a machine, partially on a machine, as a standalone software package partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0099] In the context of this application, 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 can be, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium can 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 fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0100] 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).

[0101] 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 through digital data processing (e.g., data processing networks) of any form or medium. Examples of data processing networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0102] A computing system can include clients and servers. Clients and servers are generally geographically separated and typically interact via data processing 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.

[0103] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired information of the technical solution of this application can be achieved, and this is not limited herein.

[0104] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. 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 application should be included within the scope of protection of this application.

Claims

1. A method for determining stratigraphic erosion data, characterized in that, The method includes: The target layer, the Shanghai flooding surface, and the lower sea flooding surface are determined to calculate the stratigraphic erosion data. The Shanghai flooding surface is the sea flooding surface located above the top surface of the target layer and closest to the top surface of the target layer. The lower sea flooding surface is the sea flooding surface located below the bottom surface of the target layer and closest to the bottom surface of the target layer. The erosion point is determined based on the target layer and the underlying strata; wherein the underlying strata are the strata located between the bottom surface of the target layer and the lower sea flooding surface; The amount of erosion is determined based on the thickness between the upper edge of the line extending upwards along the stratum from the erosion point and the bottom surface of the target layer.

2. The method according to claim 1, characterized in that, The erosion points are determined based on the target layer and the underlying strata; wherein, the underlying strata are the strata located between the bottom surface of the target layer and the underlying floodplain, including: Flatten the bottom surface of the target layer and determine the underlying strata that intersect with the bottom surface of the target layer; The point where the underlying stratum intersects with the bottom surface of the target stratum is taken as the erosion point.

3. The method according to claim 1, characterized in that, The amount of formation erosion is determined based on the thickness between the upper edge of the line extending upwards along the formation direction from the erosion point and the bottom surface of the target layer, including: A lower edge line is obtained by extending downward from the erosion point along the underlying strata, and the thickness between the erosion point and the underlying sea surface is determined. Based on the principle of equal thickness, the upper edge line is obtained by extending upwards along the stratum from the erosion point according to the thickness; The thickness between the upper edge line and the bottom surface of the target layer is taken as the amount of erosion.

4. The method according to claim 3, characterized in that, Based on the principle of equal thickness, the upper edge line is obtained by extending upwards along the stratum from the erosion point, including: Extending upwards along the stratum from the erosion point, the thickness between the upper edge and the lower seafloor is the same as the thickness between the lower edge and the lower seafloor.

5. The method according to claim 1, characterized in that, The method further includes: Flatten the Shanghai surface. If the thickness between the Shanghai surface and the bottom surface of the target layer remains the same, then the thickness between the Shanghai surface and the bottom surface of the target layer is taken as the maximum value of the erosion amount. The accuracy of the formation erosion amount is evaluated using the maximum erosion amount as a constraint.

6. The method according to claim 5, characterized in that, The method further includes: If the amount of erosion exceeds the maximum value of the erosion amount, then the accuracy assessment of the amount of erosion is deemed unsuccessful. The erosion point is re-determined based on the target layer and the underlying strata; wherein the underlying strata are the strata located between the bottom surface of the target layer and the lower sea flooding surface, and the new erosion amount is determined based on the thickness between the upper edge line extending upward from the erosion point along the stratum direction and the bottom surface of the target layer.

7. The method according to claim 1, characterized in that, The method further includes: Based on drilling and logging data, the bottom surface of the target layer and the Shanghai flooding surface are marked and interpreted on the seismic profile to determine the stratigraphic names of the bottom surface of the target layer and the Shanghai flooding surface. If the thickness between the Shanghai flooding surface and the bottom surface of the target layer remains equal, the deposition time of the bottom surface of the target layer is determined according to the stratigraphic name of the bottom surface of the target layer, and is used as the start time of stratigraphic erosion. The deposition time of the Shanghai flooding surface is determined based on the stratigraphic name of the surface, and is used as the termination time of stratigraphic erosion.

8. A device for determining stratigraphic erosion data, characterized in that, The device includes: The stratigraphic determination module is used to determine the target layer, the Shanghai flooding surface, and the lower sea flooding surface for which stratigraphic erosion data needs to be calculated; wherein, the Shanghai flooding surface is the sea flooding surface located above the top surface of the target layer and closest to the top surface of the target layer, and the lower sea flooding surface is the sea flooding surface located below the bottom surface of the target layer and closest to the bottom surface of the target layer. The erosion point determination module is used to determine the erosion point based on the target layer and the underlying strata; wherein the underlying strata are the strata located between the bottom surface of the target layer and the lower sea flooding surface; The erosion amount determination module is used to determine the erosion amount based on the thickness between the upper edge line extending upward from the erosion point along the stratum direction and the bottom surface of the target layer.

9. An electronic device, characterized in that, The electronic device includes: At least one processor; and The memory is connected to the at least one processor for data processing; wherein, The memory stores a computer program that can be executed 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 method for determining stratigraphic erosion data 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, when executed by a processor, implement the method for determining stratigraphic erosion data as described in any one of claims 1-7.

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