Ancient landform recovery method, system, medium and equipment under mixed deposition background

Abstract

The invention discloses an ancient landform restoration method, system, medium and equipment under a mixed deposition background, and relates to the technical field of ancient landform restoration. Determining the range of the clastic rock and carbonate rock deposition system on the basis of the carbonate rock deposition system; the paleo-landforms in the clastic rock and carbonate rock deposition system range are recovered respectively; obtaining water depth data of a connection boundary of the carbonate rock and the clastic rock, and fitting two water depth curved surfaces of the clastic rock and carbonate rock deposition system ranges according to the water depth data; and splicing the same depth of the two water depth curved surfaces through the equal water depth surface to obtain the ancient landform under the background of carbonate rock and clastic rock deposition. According to the method, ancient landform recovery under the background of mixed deposition of clastic rocks and carbonate rocks is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of paleo-geomorphology restoration, and in particular to a paleo-geomorphology restoration method, system, medium and equipment under mixed sedimentation background. Background Art

[0002] Paleo-geomorphology not only controls the deposition of lacustrine clastic rocks in oil and gas basins, but also plays a vital role in the development and distribution of carbonate rocks, and to a certain extent determines the distribution of high-quality reservoirs and oil reservoirs. The restoration and detailed study of paleo-geomorphology before deposition have important guiding significance for oil and gas exploration. At present, paleo-geomorphology restoration technology is relatively mature: residual thickness method, impression method, backstripping and filling method, sedimentology method, sequence stratigraphy method, geophysics method, etc.

[0003] The residual thickness method is to obtain the residual thickness of the intermediate stratum after a series of geological activities such as erosion by subtracting the lower stratum from the upper stratum. The residual thickness obtained is generally only used to reflect the stratum trend because it ignores the effects of erosion, etc., and cannot accurately reflect the paleo-geomorphology; the impression method focuses on the selection of the overlying datum surface of the target stratum. Although it takes into account the structural characteristics of the stratum before deposition, it does not consider the influence of compaction, which ultimately leads to excessive errors; the sedimentology method restores paleo-geomorphology by integrating the structural characteristics of the target stratum before deposition, stratum erosion, paleo-geological maps, stratigraphic isopach maps, sandstone isopach maps, and lithofacies paleo-geography Various data such as maps make up for each other's shortcomings, but it is difficult to achieve the purpose of accurate restoration when the tectonic activity is strong. It is also a semi-quantitative method for restoring paleo-geomorphology. The classical sequence stratigraphic method for restoring paleo-geomorphology takes into account the influence of later structures, but the base level is not suitable for selection, and there is a lack of influence on compaction and erosion during the burial process of strata. It cannot be quantified and the accuracy cannot meet expectations. Although the restoration of paleo-geomorphology based on geochemical calculations can restore paleo-water depth through drilling paleontology, it has requirements on the number of drillings and the workload is huge, making it difficult to achieve accurate restoration of paleo-water depth and paleo-geomorphology in the entire area.

[0004] The above-mentioned paleogeomorphological restoration methods are generally only used to study relatively simple sedimentary environments, such as relatively simple lacustrine clastic rock sedimentary environments, but they are somewhat insufficient when faced with complex environments such as some lake basins where clastic rocks and carbonate rocks are mixed. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the existing paleo-geomorphology restoration methods generally only study a single sedimentary environment, and propose a paleo-geomorphology restoration method under a mixed sedimentary background, comprising the following steps: S1. Determine the carbonate sedimentary system; S2. Based on the carbonate rock depositional system, determine the scope of the clastic rock and carbonate rock depositional system; S3. Restore the paleo-geomorphology of the clastic rock and carbonate rock depositional systems separately; S4, obtaining the water depth data of the connection boundary between carbonate rock and clastic rock, and fitting two water depth surfaces of the clastic rock and carbonate rock depositional system ranges respectively according to the water depth data; S5. The same depths of the two water depth surfaces are spliced ​​together through equal water depth surfaces to obtain the paleo-geomorphology under the sedimentary background of carbonate rocks and clastic rocks.

[0006] Furthermore, the sedimentary characteristics of the carbonate sedimentary system are bioherms.

[0007] Furthermore, S2 is specifically: Make residual thickness maps of the upper and lower structural surfaces of the target layer whose paleo-geomorphology is to be restored. The distribution with the smallest residual thickness delineates the scope of the carbonate rock depositional system, and the rest is the scope of the clastic rock depositional system.

[0008] Furthermore, the paleo-geomorphological restoration of the clastic sedimentary system includes: The paleo-geomorphic trend was restored by using the residual thickness method within the clastic rock depositional system, and the paleo-geomorphic trend map was compiled using the drilling data and paleo-water depth correction; The depth of decompacted rock layers was restored within the scope of the clastic rock depositional system, and the paleo-geomorphological trend map was adjusted.

[0009] Furthermore, the paleo-geomorphology of the carbonate sedimentary system was restored through seismic phase characteristics.

[0010] Furthermore, S4 is specifically: S41. Query characteristic organisms representing water depth according to the geological age of the stratum to be restored and formulate a water depth table of characteristic organisms; S42. Collect core and cutting samples at the junction of carbonate rock and clastic rock; S43, extracting water depth data of characteristic organisms of the sample based on the water depth table of characteristic organisms; S44. Fit the water depth surfaces of the clastic rock and carbonate rock depositional systems respectively based on the obtained water depth data and sample locations.

[0011] Furthermore, S44 is specifically: S441, establish a three-dimensional coordinate system at the connection boundary of carbonate rock and clastic rock to obtain the X and Y coordinates of the characteristic organisms of the sample information; S442, taking the average water depth of the water depth data of the characteristic organisms of the sample information as the Z coordinate; S443, making an excel table with the above X, Y, and Z coordinates, and importing the excel table into ArcGIS for interpolation processing to obtain two water depth surfaces within the range of clastic rock and carbonate rock depositional systems.

[0012] The present invention also proposes a paleo-geomorphology restoration system under mixed sedimentary background, comprising: Sedimentation system determination unit, used to determine carbonate sedimentation system; The sedimentary system range determination unit is used to determine the range of clastic rock and carbonate rock sedimentary systems based on the carbonate rock sedimentary system; Paleomorphological restoration units are used to restore the paleomorphology of clastic rock and carbonate rock depositional systems respectively; The water depth surface fitting unit is used to obtain the water depth data of the connection boundary between carbonate rock and clastic rock, and to fit two water depth surfaces of the clastic rock and carbonate rock sedimentary system ranges according to the water depth data; The water depth surface splicing unit is used to splice the same depth of two water depth surfaces through equal water depth surfaces to obtain the paleo-geomorphology under the sedimentary background of carbonate rocks and clastic rocks.

[0013] The present invention also proposes a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, it implements the above-mentioned paleo-geomorphology restoration method under the mixed sedimentary background.

[0014] The present invention also proposes an electronic device, comprising a processor and a memory, wherein the processor and the memory are interconnected, wherein the memory is used to store a computer program, the computer program comprises computer-readable instructions, and the processor is configured to call the computer-readable instructions to execute the above-mentioned paleo-geomorphology restoration method under a mixed sedimentary background.

[0015] The beneficial effects brought by the technical solution provided by the present invention are: The present invention first determines the scope of the clastic rock and carbonate rock depositional systems under the complex depositional background, and restores the paleo-geomorphology of each based on its own characteristics, and finally uses the water depth data of characteristic organisms to reasonably fit and splice the two areas. The present invention realizes the paleo-geomorphology restoration under the mixed depositional background of clastic rock and carbonate rock. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a flow chart of a paleo-geomorphology restoration method under a mixed sedimentary background according to an embodiment of the present invention; Figure 2 It is a block diagram of an electronic device in an exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0017] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0018] Example 1: A flow chart of a paleo-geomorphology restoration method under mixed sedimentary background according to an embodiment of the present invention is shown in FIG. Figure 1 , specifically including the following steps: S1. Determine the carbonate sedimentary system.

[0019] In a preferred embodiment, the sedimentary characteristics of the carbonate sedimentary system are bioherms.

[0020] As a special type of carbonate rock sedimentary body, bioherms have undergone a long period of diagenesis and sedimentation in their growth and development, resulting in special petrological characteristics, internal structure, basic structure, and landform. The seismic parameters such as reflection characteristics, continuity, frequency, and amplitude of their seismic profiles are unique compared to those of the surrounding rocks and can be accurately identified by their characteristics on seismic profiles.

[0021] Bioherms are generally developed in warm, shallow, clear and salty shallow-sea atolls. Due to their special lithogenesis, their sedimentation rate is greater than that of the surrounding sediments, so their appearance is generally manifested as hillocks or lens-shaped protrusions; in the process of reef building and the life activities of reef-attached organisms, blocky framework geological bodies with blank, chaotic, discontinuous reflection characteristics and no sedimentary forces will gradually form in the bioherms; the lithology of bioherms and overlying layers is often quite different, so the top generally presents the characteristics of double strong phase parallel reflection; the bottom morphology of bioherms is generally convex (the propagation rate of the surrounding rock is less than the reef body rate), flat (the propagation rate is similar) or concave (the propagation rate of the surrounding rock is greater than the reef body rate), and in the case of large bioherms extending to the sea, obvious progradation will also occur; due to the special mechanical properties of bioherms, there are usually a certain amount of faults or cracks inside them. If they are filled with fluid, chaotic reflection characteristics will appear on the upper part or inside of the bioherm.

[0022] Generally speaking, a reef will only show certain seismic reflection characteristics, and the above reflection characteristics may not appear at the same time.

[0023] S2. Based on the carbonate rock depositional system, determine the scope of the clastic rock and carbonate rock depositional system.

[0024] In a preferred embodiment, a residual thickness map of the upper and lower structural surfaces of the target layer of the ancient landform to be restored is made in Petrel, and the distribution of the smallest residual thickness delineates the scope of the carbonate rock deposition system, and the rest is the scope of the clastic rock deposition system. The target layer refers to the stratum or sedimentary surface at a specific period in geological history, which records the geographical environment and structural characteristics at that time. In the present invention, it refers to the stratum above a certain pre-depositional ancient landform that is intended to be restored.

[0025] The clastic rocks in the depression period of the lake basin are under-compensated deposits, that is, the clastic rocks whose accommodation space can completely accommodate the deposits are generally deposited in accessible low-lying areas due to gravity and other effects, while the reef carbonate rocks are generally deposited in high-lying areas near the horizontal plane due to special biological lithogenesis. Therefore, in the residual thickness map, the point with the smallest residual thickness near the identified carbonate bioherms is least affected by the sedimentation of the two. The scope of the carbonate sedimentary system is delineated according to the distribution of this minimum thickness.

[0026] S3. Restore the paleo-geomorphology of the clastic rock and carbonate rock depositional systems separately.

[0027] In a preferred embodiment, based on the residual thickness map, a map boundary is set in Petrel to divide the sedimentary system range of clastic rocks and reef carbonate rocks, and the entire block paleo-geomorphology is divided into clastic rocks and reef carbonate rocks according to the boundary to restore them separately.

[0028] (1) Paleogeomorphological restoration of the clastic rock depositional system ①Recovering paleo-geomorphological trends using the residual thickness method The residual thickness method is used to restore the paleo-geomorphic trend within the clastic rock depositional system, and the paleo-geomorphic trend map is compiled using drilling measured data and paleo-water depth correction.

[0029] Specifically, based on the principle of correlation between the thickness of stratigraphic sediments and the original paleo-geomorphology, paleo-geomorphology can be restored through the stratigraphic layering interpretation data of the seismic data body. The approach is to determine an isochronous interface with stable sedimentation and good continuity below the erosion surface, which can be tracked and compared over a large area as a reference surface. The bottom interface is flattened, and the areas with large differences in stratigraphic thickness between it and the upper interface after flattening represent relatively low-lying landforms, and vice versa. Sedimentary strata that have undergone various geological activities in the later period often produce residual thickness that is not very objective. After integrating the residual thickness, drilling measured data and paleo-water depth correction, a paleo-geomorphology trend map is compiled.

[0030] ② Decompaction depth recovery The depth of decompacted rock layers was restored within the scope of the clastic rock depositional system, and the paleo-geomorphological trend map was adjusted.

[0031] During the fault period, the lake basin was almost entirely underwater, so it was less likely to be exposed and eroded by uplift, and the amount of underwater erosion was almost negligible, so the exposure and erosion in the clastic paleogeomorphological restoration was only corrected in the non-sinking area. However, due to the greater influence of gravity compaction of the overlying rock strata in the later period, the focus of paleogeomorphological restoration of the clastic rock block was the restoration of compaction.

[0032] According to previous research results, the relationship between porosity and depth is as follows:

[0033] in is the porosity function; is the surface porosity, %; e is the base of the natural logarithm; c is the compaction factor, which reflects the slope of the compaction trend, Changshu; z is the burial depth, m. According to the formula, it can be seen that as the depth increases, the porosity gradually decreases.

[0034] Based on the concept of porosity and the principle that the stratum framework remains unchanged, the following formula is obtained:

[0035] in, is the depth of the bottom interface of the rock layer to be compacted; is the depth of the top interface of the rock layer to be compacted; is the rock formation porosity-depth function; a is the height of the top interface of the rock formation to be decompacted; b is the height of the bottom interface of the rock formation to be decompacted; the right side of the equation is the rock formation skeleton to restore the formation to the surface, and the obtained x is the depth when the rock formation is restored to the surface.

[0036] And correct the depth of compacted rock layer, the steps are as follows: ①Build the rock framework of the strata to be restored in the area based on drilling; ② Read the depth of each rock layer to be compacted according to the seismic profile; ③ Collect porosity data of wells in the area to be restored, and determine the constant coefficient of the porosity and depth function of the sandstone and mudstone layers of each well; ④ Using the principle of unchanged stratum skeleton, restore and compact each rock layer of the stratum to be restored from top to bottom, that is, find the depth of each rock layer when it is restored to the surface; If the data is insufficient, the average porosity-depth function (average porosity of a certain rock type in a certain area, depth interval) is used for calculation.

[0037] After obtaining the correction value, the paleo-geomorphological trend map is adjusted.

[0038] (1) Paleogeomorphological restoration of carbonate sedimentary systems The paleo-geomorphology of the carbonate sedimentary system is restored through seismic phase characteristics.

[0039] Specifically, after carbonate platform deposition, a distinct grain framework is easily formed under the influence of compaction, and the compaction rate of the beach body will also be lower than that of fine-grained sediments, so the landform restoration during the reef deposition period can almost ignore compaction correction.

[0040] Within the confirmed bioherm range, the granular limestone and algal limestone deposited in the shallow water uplift area on the bioherm platform are generally deposited by lateral and longitudinal accumulation, and the thickness is generally large; the limestone strata in the landward direction are relatively thin due to the shallow water body and often exposed to the surface; the fine-grained limestone components are deposited in the basinward direction due to the weak hydrodynamic conditions, so the overall thickness is not large. The landward direction refers to the direction away from the deposition center, the deposition space becomes smaller, and the terrain gradually increases. Basinward direction: In geology, a basin is a relatively low-lying part of the earth's surface, usually formed by crustal movement or erosion. Sediments in a basin (such as mud, gravel, etc.) tend to be deposited toward the center or lower-lying part of the basin. Therefore, "basinward direction" can be understood as the direction in which sediments are deposited in the basin, that is, toward the center or lower-lying part of the basin.

[0041] The platform reef-shoal phase often presents a hillock-like or lens-like appearance on the seismic profile, with double strong phase parallel reflections on the top; the inter-reef phase sediment thickness around the platform is relatively thin, with relatively weak reflection and continuity at the bottom; the seismic reflection frequency is relatively high and the amplitude is relatively strong toward the basin to the deep water area.

[0042] The above sedimentary microfacies characteristics indicate that seismic facies characteristics can not only divide the scope of bioherms, but also can be used to finely characterize the paleogeography of bioherm carbonate rocks through the constraints of tectonic and sedimentary backgrounds, supplemented by stratum thickness. The structure is a specific structure of some bioherms, including: reef core (the reef core is the main part of the bioherm, composed of bioliths or cementites accumulated in situ, with a high biological content, mainly reef-building organisms, such as corals, stromatoporoids, bryozoans, etc., and some reef-attached organisms. These organisms form the skeleton of the reef body through in situ group growth, making the reef body strong and wave-resistant.), reef wing (reef wing usually refers to the part of the reef body where the reef phase and the non-reef phase are interlaced in a finger-like transition. On the windward side of the reef body (in front of the reef), due to the impact of wind and waves, the reef is broken. Debris accumulates along the steep slope of the reef front to form fore-reef colluvial rocks or fore-reef breccias; on the leeward side - the back of the reef, it contains more mud matrix, and the debris is mainly bioclasts from the reef core), between reefs (in some reef complexes, the sediments and biological composition between reefs are closely related to the development of the reefs. During marine transgression, the reefs develop and the reefs are normal marine deposits; during marine regression, the development of the reefs is restricted and some lagoon-facies deposits may appear between the reefs), and other examples include the shape, the asymmetry of deposition on both sides due to wind direction, etc.

[0043] For example, the seismic phase characteristics of shallow lake algal mounds, spherule beaches or shell beaches in the high part of the structure are weak amplitude and hillock / low-frequency reflection; the seismic phase characteristics of mudstone limestone in the inter-shoal depression in the low part of the structure are low frequency, continuous and strong reflection; the seismic phase characteristics of the semi-deep lake to deep lake mud at the lower point are low frequency, continuous and medium to weak amplitude reflection.

[0044] The seismic characteristics of sedimentary subfacies in different regions may be slightly different due to the unique geological background. In this step, it is necessary to make corresponding seismic phase characterization templates based on the geological background to analyze the problem.

[0045] S4. Obtain the water depth data of the connection boundary between carbonate rock and clastic rock, and fit two water depth surfaces of the clastic rock and carbonate rock depositional system ranges respectively according to the water depth data.

[0046] In a preferred embodiment, S4 is specifically: S41. Query characteristic organisms representing water depth according to the geological age of the stratum to be restored and formulate a water depth table of characteristic organisms; S42. Collect core and cutting samples at the junction of carbonate rock and clastic rock; S43, extracting water depth data of characteristic organisms of the sample based on the water depth table of characteristic organisms; S44. Fit the water depth surfaces of the clastic rock and carbonate rock depositional systems respectively based on the obtained water depth data and sample locations.

[0047] S5. Use the equal water depth surface to splice the same depth of two water depth surfaces to obtain the paleo-geomorphology under the sedimentary background of carbonate rock and clastic rock. Certain characteristic organisms can accurately determine the range of the ancient water depth of the lake basin. The relative height of the clastic rock and carbonate rock landforms can be obtained through the burial depth of characteristic organisms, thus achieving the effect of paleo-geomorphology fitting and splicing.

[0048] The above partial fitting and splicing focuses on the relative height relationship of the two boundaries. However, since the block to be restored has become a paleo-geomorphological trend map, the water depth sample is difficult to define and there may be erosion. Therefore, it is not ideal to use the target layer for paleo-water depth data splicing. The overlying small layer of the target layer to be restored should be used for this work, and finally the relative height relationship between the two can be obtained.

[0049] Embodiment 2: The present invention also proposes a paleo-geomorphology restoration system under mixed sedimentary background, comprising: Sedimentation system determination unit, used to determine carbonate sedimentation system; The sedimentary system range determination unit is used to determine the range of clastic rock and carbonate rock sedimentary systems based on the carbonate rock sedimentary system; Paleomorphological restoration units are used to restore the paleomorphology of clastic rock and carbonate rock depositional systems respectively; The water depth surface fitting unit is used to obtain the water depth data of the connection boundary between carbonate rock and clastic rock, and to fit two water depth surfaces of the clastic rock and carbonate rock sedimentary system ranges according to the water depth data; The water depth surface splicing unit is used to splice the same depth of two water depth surfaces through equal water depth surfaces to obtain the paleo-geomorphology under the sedimentary background of carbonate rocks and clastic rocks.

[0050] Embodiment 3: In an exemplary embodiment, a computer-readable storage medium is included, the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the above-mentioned paleo-geomorphology restoration method under a mixed sedimentary background is implemented.

[0051] Example 4: Please refer to Figure 2 In an exemplary embodiment, an electronic device is also included, including at least one processor, at least one memory, and at least one communication bus.

[0052] Wherein, a computer program is stored in the memory, and the computer program includes computer-readable instructions. The processor calls the computer-readable instructions stored in the memory through the communication bus to execute the above-mentioned paleo-geomorphology restoration method under the mixed sedimentary background.

[0053] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for restoring ancient landforms under mixed sedimentary background, characterized in that: The following steps are involved: S1. Determine the carbonate sedimentary system; S2. Based on the carbonate rock depositional system, determine the scope of the clastic rock and carbonate rock depositional system; S3. Restore the paleo-geomorphology of the clastic rock and carbonate rock depositional systems separately; S4, obtaining the water depth data of the connection boundary between carbonate rock and clastic rock, and fitting two water depth surfaces of the clastic rock and carbonate rock depositional system ranges respectively according to the water depth data; S5. The same depths of the two water depth surfaces are spliced ​​together through equal water depth surfaces to obtain the paleo-geomorphology under the sedimentary background of carbonate rocks and clastic rocks.

2. The method for restoring ancient landforms under mixed sedimentary background according to claim 1, characterized in that: The sedimentary characteristics of the carbonate sedimentary system are bioherms.

3. The method for restoring ancient landforms under mixed sedimentary background according to claim 1, characterized in that: S2 is specifically: Make residual thickness maps of the upper and lower structural surfaces of the target layer whose paleo-geomorphology is to be restored. The distribution with the smallest residual thickness delineates the scope of the carbonate rock depositional system, and the rest is the scope of the clastic rock depositional system.

4. The method for restoring ancient landforms under mixed sedimentary background according to claim 1, characterized in that: The paleo-geomorphological restoration of the clastic rock depositional system includes: The paleo-geomorphic trend was restored by using the residual thickness method within the clastic rock depositional system, and the paleo-geomorphic trend map was compiled using the drilling data and paleo-water depth correction; The depth of decompacted rock layers was restored within the scope of the clastic rock depositional system, and the paleo-geomorphological trend map was adjusted.

5. The method for restoring ancient landforms under mixed sedimentary background according to claim 1, characterized in that: The paleo-geomorphology of the carbonate sedimentary system is restored through seismic phase characteristics.

6. The method for restoring ancient landforms under mixed sedimentary background according to claim 1, characterized in that: S4 is specifically: S41. Query characteristic organisms representing water depth according to the geological age of the stratum to be restored and formulate a water depth table of characteristic organisms; S42. Collect samples at the junction of carbonate rock and clastic rock; S43, extracting water depth data of characteristic organisms of the sample based on the water depth table of characteristic organisms; S44. Fit the water depth surfaces of the clastic rock and carbonate rock depositional systems respectively based on the obtained water depth data and sample locations.

7. The method for restoring ancient landforms under mixed sedimentary background according to claim 6, characterized in that: S44 is specifically: S441, establish a three-dimensional coordinate system at the connection boundary of carbonate rock and clastic rock to obtain the X and Y coordinates of the characteristic organisms of the sample information; S442, taking the average water depth of the water depth data of the characteristic organisms of the sample information as the Z coordinate; S443, making an excel table with the above X, Y, and Z coordinates, and importing the excel table into ArcGIS for interpolation processing to obtain two water depth surfaces within the range of clastic rock and carbonate rock depositional systems.

8. A paleo-geomorphology restoration system under mixed sedimentary background, characterized in that: include: Sedimentation system determination unit, used to determine carbonate sedimentation system; The sedimentary system range determination unit is used to determine the range of clastic rock and carbonate rock sedimentary systems based on the carbonate rock sedimentary system; Paleomorphological restoration units are used to restore the paleomorphology of clastic rock and carbonate rock depositional systems respectively; The water depth surface fitting unit is used to obtain the water depth data of the connection boundary between carbonate rock and clastic rock, and to fit two water depth surfaces of the clastic rock and carbonate rock sedimentary system ranges according to the water depth data; The water depth surface splicing unit is used to splice the same depth of two water depth surfaces through equal water depth surfaces to obtain the paleo-geomorphology under the sedimentary background of carbonate rocks and clastic rocks.

9. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

10. An electronic device, characterized in that: The method comprises a processor and a memory, wherein the processor and the memory are interconnected, wherein the memory is used to store a computer program, the computer program comprises computer-readable instructions, and the processor is configured to call the computer-readable instructions to execute the method according to any one of claims 1 to 7.

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