Method, device, medium and equipment for depicting bioherm boundaries

Abstract

The present invention discloses a method, device, medium and equipment for characterizing bioherm boundaries. The method includes: establishing a geological model of the bioherm and the underlying stable stratum; obtaining a prestack migration seismic data volume based on the geological model of the bioherm and the underlying stable stratum; obtaining a maximum positive curvature attribute along the underlying stratum based on the prestack migration seismic data volume; comparing the maximum positive curvature attribute along the stratum with multiple models of bioherm development boundaries to obtain a corresponding relationship between the maximum positive curvature attribute along the stratum and the bioherm development; based on the corresponding relationship between the maximum positive curvature attribute along the stratum and the bioherm development, combining a planar diagram of the maximum positive curvature attribute along the stratum of the underlying stratum to perform bioherm characterization. The present invention eliminates unfavorable factors such as chaotic reflection and phase channeling caused by bioherm development, uses the curvature characteristics of the underlying stable stratum to guide bioherm characterization, reduces manual participation in the bioherm characterization process, improves the accuracy of bioherm characterization, and promotes the efficient exploration and development of bioherm gas reservoirs.

Description

Technical Field

[0001] The present invention belongs to the technical field of oil and gas exploration and development, and in particular relates to a method, device, medium and electronic equipment for depicting bioherm boundaries based on seismic maximum positive curvature attributes along layers. Background Art

[0002] Bioherms are independent carbonate deposits that are often raised in the topography and have a sufficient number of in situ reef-building organisms, are able to withstand strong winds and waves, and are characterized by a high degree of topographical support. As our understanding of bioherms deepens, it has been discovered that they contain very rich reef-type oil and natural gas resources.

[0003] Therefore, characterization of bioherms is the basis for oil and gas exploration in bioherms.

[0004] At present, there are many methods for the identification and characterization of bioherms at home and abroad, such as forward modeling, seismic attribute analysis, seismic phase classification, seismic inversion, paleogeomorphological restoration, etc., among which seismic attribute analysis is a crucial method. The current seismic characterization method mainly focuses on the seismic characteristics of the bioherm itself, and it is extremely difficult to characterize the bioherm when the seismic response characteristics of the bioherm itself are unclear. The patent application (CN104977611A) discloses a bioherm reservoir carving method, in which the bioherm top and bottom characterization steps are based on the seismic profile and wave impedance profile of the bioherm, and are constrained by seismic phases, sedimentary phases, etc. This method does not have a clear method for the characterization of the bioherm itself, and the interpretation of the top and bottom of the seismic profile and wave impedance profile relies on the manual experience of geological interpreters, and lacks a clear quantitative characterization method.

[0005] Because bioherms are unique geological structures with higher sedimentation rates than surrounding strata and random development, they exhibit complex spatial morphology and rapid lateral variation. Known bioherms have been found to exhibit phase shifts in the top horizons, making interpretation challenging and demanding of geological interpreters. Seismic facies classification and seismic inversion begin with interpreting the top and bottom boundaries of the reef. Paleogeomorphological reconstruction using these interpreted horizons is then used to delineate the reef plan.

[0006] Due to the phase-shifting phenomenon of reefs, even relying on multiple attributes such as seismic phase and amplitude to assist in interpreting the reef top interface remains elusive. Furthermore, paleogeomorphological maps derived from paleogeomorphological reconstruction using the reef top and bottom interfaces lack a clear threshold for determining reef development. These two factors contribute to the ambiguity of reef characterization and hinder the efficient exploration and development of reef gas reservoirs.

[0007] To this end, a method for accurate characterization of bioherms is needed. Summary of the Invention

[0008] The purpose of the present invention is to provide a method for accurately depicting bioherms.

[0009] In a first aspect, the present invention provides a method for characterizing reef boundaries based on seismic maximum positive curvature attributes along layers, comprising: establishing a geological model of the reef and the underlying stable stratum; obtaining a prestack migration seismic data volume based on the geological model of the reef and the underlying stable stratum; obtaining a maximum positive curvature attribute along layers of the underlying stratum based on the prestack migration seismic data volume; comparing the maximum positive curvature attribute along layers with a variety of model reef development boundaries to obtain a correspondence between the maximum positive curvature attribute along layers and reef development; based on the correspondence between the maximum positive curvature attribute along layers and reef development, performing reef characterization in combination with a plan view of the maximum positive curvature attribute along layers of the underlying stratum.

[0010] Optionally, the geological model of the bioherm and underlying stable strata includes geological models of the thickness, width, distance from the bottom and physical property changes of different bioherm reservoirs.

[0011] Optionally, the prestack migration seismic data volume is obtained by the following steps: performing elastic wave forward simulation on the geological model of the bioherm and the underlying stable stratum to obtain a data volume after the forward simulation; performing prestack depth migration processing on the data volume after the forward simulation to obtain a prestack migration seismic data volume.

[0012] Optionally, the maximum positive curvature attribute along the underlying stratum is obtained by the following steps: performing layer tracking on the underlying stratum on the prestack migration seismic data volume to obtain the underlying stratum level; and extracting the maximum positive curvature attribute along the underlying stratum level.

[0013] Optionally, the correspondence between the maximum positive curvature attribute along the layer and the reef development is: the reef boundary corresponds to the point with a zero value of the maximum positive curvature along the layer of the underlying stratum.

[0014] In a second aspect, the present invention also provides an electronic device, comprising: a memory storing executable instructions; and a processor, which runs the executable instructions in the memory to implement the above-mentioned method for characterizing the boundaries of reefs based on the maximum positive curvature attribute of seismic layers.

[0015] In a third aspect, the present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the above-mentioned method for characterizing the boundaries of reefs based on the maximum positive curvature attribute along the seismic layer.

[0016] In a fourth aspect, the present invention also provides a bioherm boundary characterization device based on the maximum positive curvature attribute along the seismic layer, comprising: a model establishment module, which establishes a geological model of the bioherm and the underlying stable stratum; a data body acquisition module, which obtains a pre-stack migration seismic data body based on the geological model of the bioherm and the underlying stable stratum; a curvature attribute acquisition module, which obtains the maximum positive curvature attribute along the layer of the underlying stratum based on the pre-stack migration seismic data body; a correspondence acquisition module, which compares the maximum positive curvature attribute along the layer with multiple models of bioherm development boundaries to obtain the correspondence between the maximum positive curvature attribute along the layer and the bioherm development; a characterization module, which performs bioherm characterization based on the correspondence between the maximum positive curvature attribute along the layer and the bioherm development in combination with a plan view of the maximum positive curvature attribute along the layer of the underlying stratum.

[0017] Optionally, the geological model of the bioherm and underlying stable strata includes geological models of the thickness, width, distance from the bottom and physical property changes of different bioherm reservoirs.

[0018] Optionally, the prestack migration seismic data volume is obtained by the following steps: performing elastic wave forward simulation on the geological model of the bioherm and the underlying stable stratum to obtain a data volume after the forward simulation; performing prestack depth migration processing on the data volume after the forward simulation to obtain a prestack migration seismic data volume.

[0019] Optionally, the maximum positive curvature attribute along the underlying stratum is obtained by the following steps: performing layer tracking on the underlying stratum on the prestack migration seismic data volume to obtain the underlying stratum level; and extracting the maximum positive curvature attribute along the underlying stratum level.

[0020] Optionally, the correspondence between the maximum positive curvature attribute along the layer and the reef development is: the reef boundary corresponds to the point with a zero value of the maximum positive curvature along the layer of the underlying stratum.

[0021] The beneficial effects of the present invention are as follows: the bioherm boundary characterization method based on the maximum positive curvature attribute of the seismic layer eliminates unfavorable factors such as chaotic reflection and phase channeling caused by the development of bioherms, uses the curvature characteristics of the underlying stable strata to guide the bioherm characterization, reduces manual participation in the bioherm characterization process, improves the accuracy of bioherm characterization, and promotes the efficient exploration and development of bioherm gas reservoirs.

[0022] The present invention has other features and advantages that will be apparent from or will be described in detail in the accompanying drawings and the following specific examples incorporated herein, which together serve to explain the specific principles of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0024] Figure 1 A flow chart of a method for delineating reef boundaries based on seismic maximum positive curvature attributes along layers according to an embodiment of the present invention is shown.

[0025] Figure 2-Figure 5 The present invention shows a method for characterizing reef boundaries based on the maximum positive curvature attribute of seismic layers according to an embodiment of the present invention, showing geological models of reefs with different thicknesses, widths, distances from the bottom, and physical properties, forward modeling results, and a maximum positive curvature map of the underlying strata.

[0026] Figure 6a The results of bioherm characterization based on conventional paleogeomorphology are shown.

[0027] Figure 6b The figure shows the characterization results of a reef boundary characterization method based on the maximum positive curvature attribute of the seismic layer according to an embodiment of the present invention.

[0028] Figure 7 The verification results of the newly drilled X16 well in the work area of ​​a bioherm boundary characterization method based on the maximum positive curvature attribute of the seismic layer according to one embodiment of the present invention are shown.

[0029] Figure 8 A structural block diagram of a reef boundary delineation device based on seismic maximum positive curvature attributes along layers according to an embodiment of the present invention is shown.

[0030] Description of Reference Numerals

[0031] 102. Model building module; 104. Data volume acquisition module; 106. Curvature attribute acquisition module; 108. Correspondence acquisition module; 110. Characterization module. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0033] The present invention provides a method for characterizing reef boundaries based on seismic maximum positive curvature attributes along layers, comprising: establishing a geological model of the reef and underlying stable strata; obtaining a prestack migration seismic data volume based on the geological model of the reef and underlying stable strata; obtaining a maximum positive curvature attribute along layers of the underlying stratum based on the prestack migration seismic data volume; comparing the maximum positive curvature attribute along layers with multiple models of reef development boundaries to obtain a corresponding relationship between the maximum positive curvature attribute along layers and reef development; and characterizing the reef based on the corresponding relationship between the maximum positive curvature attribute along layers and the reef development in combination with a plan view of the maximum positive curvature attribute along layers of the underlying stratum.

[0034] Specifically, in the early stage of implementation, the development pattern of reefs was studied and determined based on the existing geophysical data and interpretation results in the study area. Based on the statistical analysis of rock physical parameters and combined with the characteristics of geophysical research, a geological model of reefs and underlying stable strata was established, including the thickness, width, distance from the bottom, and physical property variation of different reef reservoirs, to provide a model basis for subsequent research. Using the established geological model of reefs and underlying stable strata, elastic wave forward simulation was carried out to obtain the forward data body. The pre-stack depth migration processing research was carried out on the forward data body to obtain the pre-stack migration seismic data body. Combined with actual seismic data, the fluctuation changes of the underlying strata in the reef development area of ​​the study area were clarified, and an identification model for the fluctuation changes of reefs and underlying strata was established. The underlying strata were traced on the pre-stack migration seismic data body obtained by forward modeling, and the maximum positive curvature attributes along the underlying strata were extracted. By comparing the maximum positive curvature attributes of the underlying strata with the boundaries of various reef development models, a corresponding relationship between the maximum positive curvature attribute and reef development was established. Specifically, the reef boundary corresponds to the point with the maximum positive curvature of zero along the underlying stratum. This relationship, combined with curvature attribute planar maps, allows for detailed characterization of reefs and guides drilling design for reef gas reservoirs.

[0035] According to an exemplary embodiment, the bioherm boundary characterization method based on the maximum positive curvature attribute of seismic layers eliminates unfavorable factors such as chaotic reflections and phase channeling caused by bioherm development, and uses the curvature characteristics of the underlying stable strata to guide bioherm characterization, reducing human participation in the bioherm characterization process, improving the accuracy of bioherm characterization, and promoting the efficient exploration and development of bioherm gas reservoirs.

[0036] As an optional option, the geological model of bioherms and underlying stable strata includes geological models of different bioherm reservoir development thickness, width, distance from the bottom and physical property changes.

[0037] As an optional solution, the following steps are used to obtain a prestack migration seismic data volume: elastic wave forward modeling is performed on the geological model of the bioherm and the underlying stable strata to obtain a forward modeled data volume; and prestack depth migration is performed on the forward modeled data volume to obtain a prestack migration seismic data volume.

[0038] Specifically, the established geological model of bioherms and underlying stable strata is used to carry out elastic wave forward simulation to obtain the forward modeled data body, and pre-stack depth migration processing research is carried out on the forward modeled data body to obtain the pre-stack migration seismic data body.

[0039] As an optional solution, the maximum positive curvature attribute along the underlying stratum is obtained by the following steps: performing layer tracking on the underlying stratum on the prestack migration seismic data volume to obtain the underlying stratum horizon; and extracting the maximum positive curvature attribute along the underlying stratum horizon.

[0040] Specifically, the underlying strata are traced on the prestack migration seismic data volume obtained by forward modeling, and the maximum positive curvature attribute along the underlying strata is extracted.

[0041] As an optional scheme, the correspondence between the maximum positive curvature attribute along the layer and the development of the reef is: the reef boundary corresponds to the point with the maximum positive curvature of 0 along the layer of the underlying stratum.

[0042] Specifically, during the detailed characterization, the curvature attribute plane map is combined to characterize the position of the point with the maximum positive curvature value of 0 in the curvature attribute plane map as the boundary of the reef.

[0043] In a second aspect, the present invention also provides an electronic device, which includes: a memory storing executable instructions; and a processor running the executable instructions in the memory to implement the above-mentioned method for characterizing the boundaries of reefs based on the maximum positive curvature attribute along the seismic layer.

[0044] In a third aspect, the present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the above-mentioned method for characterizing the boundaries of reefs based on the maximum positive curvature attribute along the seismic layer.

[0045] In a fourth aspect, the present invention also provides a bioherm boundary characterization device based on the maximum positive curvature attribute along the seismic layer, comprising: a model establishment module, which establishes a geological model of the bioherm and the underlying stable stratum; a data body acquisition module, which obtains the pre-stack migration seismic data body based on the geological model of the bioherm and the underlying stable stratum; a curvature attribute acquisition module, which obtains the maximum positive curvature attribute along the layer of the underlying stratum based on the pre-stack migration seismic data body; a correspondence acquisition module, which compares the maximum positive curvature attribute along the layer with multiple models of bioherm development boundaries, and obtains the correspondence between the maximum positive curvature attribute along the layer and the bioherm development; a characterization module, which performs bioherm characterization based on the correspondence between the maximum positive curvature attribute along the layer and the bioherm development, combined with the plan view of the maximum positive curvature attribute along the layer of the underlying stratum.

[0046] Specifically, in the early stage of implementation, the development pattern of reefs was studied and determined based on the existing geophysical data and interpretation results in the study area. Based on the statistical analysis of rock physical parameters and combined with the characteristics of geophysical research, a geological model of reefs and underlying stable strata was established, including the thickness, width, distance from the bottom, and physical property variation of different reef reservoirs, to provide a model basis for subsequent research. Using the established geological model of reefs and underlying stable strata, elastic wave forward simulation was carried out to obtain the forward data body. The pre-stack depth migration processing research was carried out on the forward data body to obtain the pre-stack migration seismic data body. Combined with actual seismic data, the fluctuation changes of the underlying strata in the reef development area of ​​the study area were clarified, and an identification model for the fluctuation changes of reefs and underlying strata was established. The underlying strata were traced on the pre-stack migration seismic data body obtained by forward modeling, and the maximum positive curvature attributes along the underlying strata were extracted. By comparing the maximum positive curvature attributes of the underlying strata with the boundaries of various reef development models, a corresponding relationship between the maximum positive curvature attribute and reef development was established. Specifically, the reef boundary corresponds to the point with the maximum positive curvature of zero along the underlying stratum. This relationship, combined with curvature attribute planar maps, allows for detailed characterization of reefs and guides drilling design for reef gas reservoirs.

[0047] According to an exemplary embodiment, the bioherm boundary characterization method based on the maximum positive curvature attribute of seismic layers eliminates unfavorable factors such as chaotic reflections and phase channeling caused by bioherm development, and uses the curvature characteristics of the underlying stable strata to guide bioherm characterization, reducing human participation in the bioherm characterization process, improving the accuracy of bioherm characterization, and promoting the efficient exploration and development of bioherm gas reservoirs.

[0048] As an optional option, the geological model of bioherms and underlying stable strata includes geological models of different bioherm reservoir development thickness, width, distance from the bottom and physical property changes.

[0049] As an optional solution, the following steps are used to obtain a prestack migration seismic data volume: elastic wave forward modeling is performed on the geological model of the bioherm and the underlying stable strata to obtain a forward modeled data volume; and prestack depth migration is performed on the forward modeled data volume to obtain a prestack migration seismic data volume.

[0050] Specifically, the established geological model of bioherms and underlying stable strata is used to carry out elastic wave forward simulation to obtain the forward modeled data body, and pre-stack depth migration processing research is carried out on the forward modeled data body to obtain the pre-stack migration seismic data body.

[0051] As an optional solution, the maximum positive curvature attribute along the underlying stratum is obtained by the following steps: performing layer tracking on the underlying stratum on the prestack migration seismic data volume to obtain the underlying stratum horizon; and extracting the maximum positive curvature attribute along the underlying stratum horizon.

[0052] Specifically, the underlying strata are traced on the prestack migration seismic data volume obtained by forward modeling, and the maximum positive curvature attribute along the underlying strata is extracted.

[0053] As an optional scheme, the correspondence between the maximum positive curvature attribute along the layer and the development of the reef is: the reef boundary corresponds to the point with the maximum positive curvature of 0 along the layer of the underlying stratum.

[0054] Specifically, during the detailed characterization, the curvature attribute plane map is combined to characterize the position of the point with the maximum positive curvature value of 0 in the curvature attribute plane map as the boundary of the reef.

[0055] Example 1

[0056] Figure 1 A flow chart of a method for delineating reef boundaries based on seismic maximum positive curvature attributes along layers according to an embodiment of the present invention is shown. Figure 2-Figure 5 The present invention shows a method for characterizing reef boundaries based on the maximum positive curvature attribute of seismic layers according to an embodiment of the present invention, showing geological models of reefs with different thicknesses, widths, distances from the bottom, and physical properties, forward modeling results, and a maximum positive curvature map of the underlying strata. Figure 6a The results of bioherm characterization based on conventional paleogeomorphology are shown. Figure 6b The figure shows the characterization results of a reef boundary characterization method based on the maximum positive curvature attribute of the seismic layer according to an embodiment of the present invention. Figure 7 The verification results of the newly drilled X16 well in the work area of ​​a bioherm boundary characterization method based on the maximum positive curvature attribute of the seismic layer according to one embodiment of the present invention are shown.

[0057] Combine Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6a 、 Figure 6b and Figure 7 As shown in FIG, the method for characterizing the boundaries of reefs based on the maximum positive curvature attribute of seismic layers includes:

[0058] Step 1: Establish a geological model of the bioherm and underlying stable strata;

[0059] Step 2: Based on the geological model of the bioherm and the underlying stable strata, obtain the prestack migration seismic data volume;

[0060] Step 3: Based on the prestack migration seismic data volume, obtain the maximum positive curvature attribute of the underlying stratum along the layer;

[0061] Step 4: Compare the maximum positive curvature attribute along the layer with the development boundaries of various models of reefs to obtain the corresponding relationship between the maximum positive curvature attribute along the layer and the development of reefs;

[0062] Step 5: Based on the correspondence between the maximum positive curvature attribute along the layer and the development of the reef, the reef is depicted in combination with the plane map of the maximum positive curvature attribute along the layer of the underlying stratum.

[0063] Among them, the geological model of bioherms and underlying stable strata includes geological models of different bioherm reservoir development thickness, width, distance from the bottom and physical property changes.

[0064] The prestack migration seismic data volume is obtained by the following steps: elastic wave forward modeling is performed on the geological model of the bioherm and the underlying stable stratum to obtain a data volume after the forward modeling; and prestack depth migration is performed on the data volume after the forward modeling to obtain a prestack migration seismic data volume.

[0065] The maximum positive curvature attribute along the underlying stratum is obtained by the following steps: performing layer tracking on the underlying stratum on the prestack migration seismic data volume to obtain the underlying stratum position; and extracting the maximum positive curvature attribute along the underlying stratum position.

[0066] Among them, the corresponding relationship between the maximum positive curvature attribute along the layer and the development of reefs is: the boundary of the reef corresponds to the point with the maximum positive curvature of 0 along the layer of the underlying stratum.

[0067] Figures 2 to 5 They are geological models of reefs with different thicknesses, widths, distances from the bottom, and physical properties, forward modeling results, and the maximum positive curvature map of the underlying strata. Figures 2 to 5 The forward simulation results show that the development of reefs will cause the pull-down of the underlying strata. Figures 2 to 5 The maximum curvature attribute diagram summarizes that no matter how the thickness, width and physical properties of the reef change, the maximum positive curvature attribute value of 0 along the underlying stratum corresponds to the boundary position of the reef.

[0068] Based on this correspondence, we can provide guidance for tracing the top boundary of the reef and depict the planar distribution of the reef more precisely. Figure 6a This is a conventional planar depiction of bioherms based on paleo-geomorphology in a certain work area in the Sichuan Basin. Figure 6b This is a planar depiction of a reef based on maximum positive curvature. While the two maps are generally similar in shape, there are still many differences in details: ① The reef has gone from one to many: multiple reefs have been depicted from a single contiguous reef, resulting in a more detailed depiction; ② The reef has gone from nothing to something: small reefs that were not visible in paleogeology have been depicted in curvature properties; ③ The reef has gone from coarse to fine: reefs whose boundaries were unclear in paleogeology are now more clearly visible in the curvature properties plane. Figure 7The newly drilled X16 well in the work area achieved a breakthrough of two reefs in one well by using the maximum positive curvature of the underlying stratum to guide drilling. Two reefs were encountered in the horizontal layer of the well. The zero-value point of the maximum positive curvature of the underlying stratum corresponds to the exit point (boundary) of reef No. 1 and the entry point (boundary) of reef No. 2, which verifies the rationality and effectiveness of the present invention and can be promoted and applied in other work areas to promote the efficient exploration and development of reef gas reservoirs.

[0069] Example 2

[0070] Figure 8 A structural block diagram of a reef boundary delineation device based on seismic maximum positive curvature attributes along layers according to an embodiment of the present invention is shown.

[0071] like Figure 8 As shown, the bioherm boundary characterization device based on the maximum positive curvature attribute of the seismic layer includes:

[0072] Model building module 102, building a geological model of the bioherm and underlying stable strata;

[0073] The data volume acquisition module 104 obtains a prestack migration seismic data volume based on the geological model of the bioherm and the underlying stable strata;

[0074] The curvature attribute acquisition module 106 obtains the maximum positive curvature attribute of the underlying stratum along the layer based on the prestack migration seismic data volume;

[0075] The corresponding relationship acquisition module 108 compares the maximum positive curvature attribute along the layer with the development boundaries of multiple models of reefs to obtain the corresponding relationship between the maximum positive curvature attribute along the layer and the development of reefs;

[0076] The characterization module 110 characterizes the reef based on the correspondence between the maximum positive curvature attribute along the layer and the development of the reef, combined with the plane map of the maximum positive curvature attribute along the layer of the underlying stratum.

[0077] Among them, the geological model of bioherms and underlying stable strata includes geological models of different bioherm reservoir development thickness, width, distance from the bottom and physical property changes.

[0078] The prestack migration seismic data volume is obtained by the following steps: elastic wave forward modeling is performed on the geological model of the bioherm and the underlying stable stratum to obtain a data volume after the forward modeling; and prestack depth migration is performed on the data volume after the forward modeling to obtain a prestack migration seismic data volume.

[0079] The maximum positive curvature attribute along the underlying stratum is obtained by the following steps: performing layer tracking on the underlying stratum on the prestack migration seismic data volume to obtain the underlying stratum position; and extracting the maximum positive curvature attribute along the underlying stratum position.

[0080] Among them, the corresponding relationship between the maximum positive curvature attribute along the layer and the development of reefs is: the boundary of the reef corresponds to the point with the maximum positive curvature of 0 along the layer of the underlying stratum.

[0081] Example 3

[0082] The present disclosure provides an electronic device comprising: a memory storing executable instructions; and a processor executing the executable instructions in the memory to implement the above-mentioned method for characterizing bioherm boundaries based on the maximum positive curvature attribute along the seismic layer.

[0083] An electronic device according to an embodiment of the present disclosure includes a memory and a processor.

[0084] The memory is used to store non-transitory computer-readable instructions. Specifically, the memory may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory. The non-volatile memory may include, for example, read-only memory (ROM), a hard disk, flash memory, etc.

[0085] The processor may be a central processing unit (CPU) or other form of processing unit having data processing capability and / or instruction execution capability, and may control other components in the electronic device to perform desired functions. In one embodiment of the present disclosure, the processor is used to execute the computer-readable instructions stored in the memory.

[0086] Those skilled in the art should understand that in order to solve the technical problem of how to obtain a good user experience, this embodiment may also include well-known structures such as a communication bus and an interface, and these well-known structures should also be included in the scope of protection of this disclosure.

[0087] For detailed description of this embodiment, please refer to the corresponding description in the aforementioned embodiments, which will not be repeated here.

[0088] Example 4

[0089] The present disclosure provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the method for delineating bioherm boundaries based on the maximum positive curvature attribute along the seismic layer is implemented.

[0090] According to an embodiment of the present disclosure, a computer-readable storage medium stores non-transitory computer-readable instructions, which, when executed by a processor, execute all or part of the steps of the aforementioned methods of the embodiments of the present disclosure.

[0091] The above-mentioned computer-readable storage media include, but are not limited to, optical storage media (e.g., CD-ROMs and DVDs), magneto-optical storage media (e.g., MOs), magnetic storage media (e.g., magnetic tapes or mobile hard disks), media with built-in rewritable non-volatile memory (e.g., memory cards), and media with built-in ROM (e.g., ROM cartridges).

[0092] While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A method for characterizing reef boundaries based on the maximum positive curvature attribute of seismic layers, characterized by: include: Establish geological models of bioherms and underlying stable strata; Based on the geological model of the bioherm and the underlying stable strata, a prestack migration seismic data volume is obtained; Based on the prestack migration seismic data volume, obtaining a maximum positive curvature attribute of the underlying stratum along the layer; Comparing the maximum positive curvature attribute along the layer with the development boundaries of various models of reefs, obtaining the corresponding relationship between the maximum positive curvature attribute along the layer and the development of reefs; Based on the correspondence between the maximum positive curvature attribute along the layer and the development of the reef, the reef is depicted in combination with the plane map of the maximum positive curvature attribute along the layer of the underlying stratum; The corresponding relationship between the maximum positive curvature attribute along the layer and the development of the reef is: the boundary of the reef corresponds to the point with the maximum positive curvature of 0 along the layer of the underlying stratum.

2. The method for delineating reef boundaries based on the maximum positive curvature attribute of seismic layers according to claim 1, characterized in that: The geological model of the bioherm and underlying stable strata includes geological models of different bioherm reservoir development thickness, width, distance from the bottom and physical property changes.

3. The method for delineating reef boundaries based on the maximum positive curvature attribute of seismic layers according to claim 1, characterized in that: The prestack migration seismic data volume is obtained by the following steps: Performing elastic wave forward modeling on the bioherm and the underlying stable stratum geological model to obtain a forward modeled data volume; The data volume after forward simulation is processed by pre-stack depth migration to obtain pre-stack migration seismic data volume.

4. The method for delineating reef boundaries based on the maximum positive curvature attribute of seismic layers according to claim 3, characterized in that: The maximum positive curvature attribute of the underlying stratum along the layer is obtained by the following steps: performing horizon tracking on the underlying stratum on the prestack migration seismic data volume to obtain the horizon of the underlying stratum; The maximum positive curvature attribute along the layer is extracted along the underlying stratum horizon.

5. An electronic device, characterized in that: The electronic device comprises: a memory storing executable instructions; A processor runs the executable instructions in the memory to implement the reef boundary characterization method based on the maximum positive curvature attribute of the seismic layer according to any one of claims 1 to 4.

6. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, which, when executed by a processor, implements the method for characterizing reef boundaries based on seismic maximum positive curvature attributes along layers according to any one of claims 1 to 4.

7. A device for depicting reef boundaries based on the maximum positive curvature attribute of seismic layers, characterized in that: include: Model building module, to build geological models of bioherms and underlying stable strata; A data volume acquisition module, which obtains a prestack migration seismic data volume based on the geological model of the bioherm and the underlying stable strata; a curvature attribute acquisition module for acquiring a maximum positive curvature attribute of an underlying stratum along a layer based on the prestack migration seismic data volume; a corresponding relationship acquisition module, comparing the maximum positive curvature attribute along the layer with the development boundaries of multiple models of reefs, and obtaining the corresponding relationship between the maximum positive curvature attribute along the layer and the development of reefs; A characterization module, based on the correspondence between the maximum positive curvature attribute along the layer and the development of the reef, combines the maximum positive curvature attribute plane map of the underlying stratum along the layer to perform reef characterization; The corresponding relationship between the maximum positive curvature attribute along the layer and the development of the reef is: the boundary of the reef corresponds to the point with the maximum positive curvature of 0 along the layer of the underlying stratum.

8. The device for depicting reef boundaries based on the maximum positive curvature attribute of seismic layers according to claim 7, characterized in that: The maximum positive curvature attribute of the underlying stratum along the layer is obtained by the following steps: performing horizon tracking on the underlying stratum on the prestack migration seismic data volume to obtain the horizon of the underlying stratum; The maximum positive curvature attribute along the layer is extracted along the underlying stratum horizon.

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