Land trellis-land slope region to-be-recovered paleo-water depth datum line determination and related method and device

Abstract

The invention discloses a land frame-land slope area to-be-recovered paleo-water depth datum line determination method and device and a related method and device. The method for determining the datum line of the paleo-water depth to be recovered comprises the steps that a control point of the paleo-water depth to be recovered is determined according to the form of an overlying stratum of a target stratum in a geological section, and the overlying stratum is the uppermost stratum in the geological section; determining a corresponding point of the control point in the target stratum, and obtaining a reference point according to a difference value between the water depth at the control point and the vertical apparent thickness of the target stratum at the corresponding point; and obtaining a datum line of the to-be-recovered paleo-water depth of the target stratum based The method is suitable for restoring the paleo-water depth of the land frame-land slope area of the marine sedimentary basin with the under-supplement type wide land edge, the paleo-water depth datum line to be restored is calculated through subtraction of the current water depth and the vertical apparent thickness of the sedimentary strata according to the inheritance principle of land frame-land slope sedimentary strata development, and the paleo-water depth datum line to be restored is obtained. A reliable layer leveling datum line is provided for stratum structure deposition deformation recovery, and the balance profile recovery accuracy is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of paleogeography restoration, and in particular to the determination of paleo-water depth baselines to be restored in a shelf-slope region and related methods and devices. Background Art

[0002] Balanced profile technology is a relatively mature and important technology for studying the tectonic evolution of basins and verifying whether the interpretation of seismic strata and faults is reasonable. The core of the concept of balanced profile is conservation. Balanced profile restoration means that on the basis of following the conservation of area (or layer length conservation), the seismic geological profile of the current stratum deformation is completely restored to a reasonable stratum undeformed state through geometric principles, or the profile of the original sedimentary stratum can be deformed according to a series of deformation principles. Balanced profile technology can be used to quantitatively analyze the structural characteristics of oil and gas basins, quickly, effectively and reasonably restore the tectonic evolution history of the basin, and provide a reliable basis for oil and gas exploration.

[0003] In the process of traditional profile balance restoration, for the restoration of each sedimentary period, the stratum restoration is usually carried out by simple top flattening and layer-by-layer stripping. For stable sedimentary marine strata or continental lake basins with sufficient material supply and each period can be filled and supplemented, this traditional restoration method can restore the prototype of the sedimentary basin of the corresponding period through fault and stratum compaction restoration, and simply flattening the top surface of the stratum can reflect the tectonic evolution characteristics of the local area. However, for the restoration of tectonic evolution of under-supplemented open terrestrial margin marine sedimentary basins, stable continental shelves and steeper continental slopes are often developed, and the stratum deposition is not filled and supplemented. Directly applying conventional balanced profile technology to flatten the top surface of the stratum in the shelf-slope area will change the original sedimentary stratum morphology, and cannot accurately restore the original stratum sedimentary morphology, and cannot accurately reflect the tectonic evolution history of the basin, resulting in large errors in the quantitative analysis of the tectonic movement characteristics of oil and gas basins. Summary of the invention

[0004] The inventor found in the technical research that in order to solve the problem that simple layer flattening cannot accurately restore the tectonic evolution of the under-supplemented open marine sedimentary basin, Chai Haodong (2015) proposed to use the paleotopographic features of the delta front to restore the balanced profile of the shelf-slope area. This method simply assumes that the shelf before sedimentation is a horizontal feature. Its core is to extend the top surface line of the subsided slope and use it as a baseline for layer flattening. The strata in the shelf area are restored, and the strata on the slope and seaward direction will rotate. After multiple restorations, not only will the original stratum morphology not be restored, but a larger stratum rotation will be introduced. When Ding Weiwei (2009) applied the balanced profile restoration technology in the study of "Cenozoic tectonic-sedimentary evolution of the shelf-slope area in the central and northern South China Sea", he applied the paleo-water depth data of different periods of the region by existing scholars. Even with ancient water depth data, when it comes to restoring the stratigraphic equilibrium profile in the shelf-slope area, people currently mainly rely on the understanding of the tectonic characteristics of the area and try many times to find the layer leveling baseline until the stratigraphic restoration is reasonable. This method relies heavily on experience, is time-consuming and labor-intensive, and has poor accuracy.

[0005] In order to enrich the method routes and increase the selection space, the embodiment of the present invention provides a method and device for determining the ancient water depth baseline to be restored in the shelf-slope area, which provides a reasonable and reliable layer leveling baseline for the restoration of stratigraphic structure sedimentary deformation in the shelf-slope area and improves the accuracy of equilibrium profile restoration.

[0006] In a first aspect, an embodiment of the present invention provides a method for determining a paleo-water depth baseline to be restored in a shelf-slope region, comprising:

[0007] Determine the control point for restoring the ancient water depth according to the overlying stratum morphology of the target stratum in the geological section, wherein the overlying stratum is the uppermost stratum in the geological section;

[0008] Determine a corresponding point of the control point in the target stratum, and obtain a reference point according to the difference between the water depth at the control point and the vertical apparent thickness of the target stratum at the corresponding point;

[0009] A baseline for restoring the ancient water depth of the target stratum is obtained based on the benchmark points.

[0010] In some embodiments, determining the control point for recovering the ancient water depth according to the overlying stratum morphology of the target stratum in the geological section includes:

[0011] The control points for the restoration of paleo-water depth are determined at least at the following positions of the overlying strata of the target strata in the geological section:

[0012] The continental shelf area, the transition zone between the continental shelf and the continental slope, the inflection point area of ​​the continental slope, and the transition zone between the continental slope and the seabed.

[0013] In some embodiments, the step of determining the control point for recovering the ancient water depth according to the overlying stratum morphology of the target stratum in the geological section further includes:

[0014] If abnormal structures develop in the overlying strata, the control points for restoring the ancient water depth shall be determined at the corresponding positions of the abnormal structures.

[0015] In some embodiments, determining a corresponding point of a control point in the target formation includes:

[0016] According to the law of the forward migration of the continental slope with time evolution, points matching the morphology of the control points are determined in the target stratum as corresponding points of the control points.

[0017] In some embodiments, obtaining a baseline of the target stratum to be restored paleo-water depth based on the benchmark point includes:

[0018] Based on the benchmark points, a benchmark line for restoring the ancient water depth of the target stratum is obtained by a smooth transition method.

[0019] In a second aspect, an embodiment of the present invention provides a method for restoring a balanced profile in a shelf-slope region, comprising:

[0020] The structural interpretation step is to conduct structural interpretation of the selected seismic sections in the shelf-slope area to obtain the initial geological section;

[0021] The step of determining the baseline is to take the underlying stratum of the uppermost stratum in the current geological section as the target stratum for restoration of paleo-water depth, and determine the baseline for restoration of paleo-water depth of the target stratum according to any of the above-mentioned methods for determining the baseline for restoration of paleo-water depth in the shelf-slope region;

[0022] A balanced profile restoration step, using a balanced profile technique to peel back the uppermost stratum in the geological profile, flatten the baseline, and obtain a structural development evolution history profile of the target stratum during its deposition period as a new geological profile;

[0023] Verify whether the current geological profile is balanced; if not, return to the structural interpretation step; if so, return to the baseline determination step until there is only one sedimentary stratum in the current geological profile.

[0024] In some embodiments, verifying whether the current geological profile is balanced includes:

[0025] Verify whether the current geological profile is consistent with geological understanding.

[0026] In a third aspect, an embodiment of the present invention provides a device for determining a paleo-water depth baseline to be restored in a shelf-slope region, comprising:

[0027] A control point determination module, used to determine the control point to be restored ancient water depth according to the overlying stratum morphology of the target stratum in the geological section, wherein the overlying stratum is the uppermost stratum in the geological section;

[0028] A reference point determination module, used to determine the corresponding point of the control point in the target stratum, and obtain the reference point according to the difference between the water depth at the control point and the vertical apparent thickness of the target stratum at the corresponding point;

[0029] The baseline determination module is used to obtain the baseline of the target stratum to be restored ancient water depth based on the benchmark point.

[0030] In a fourth aspect, an embodiment of the present invention provides a device for restoring a balanced profile in a shelf-slope region, comprising:

[0031] The structural interpretation module is used to interpret the structure of the selected seismic profiles in the shelf-slope area and obtain the initial geological profiles;

[0032] A baseline determination module is used to determine the baseline of the target stratum to be restored to the ancient water depth by taking the underlying stratum of the uppermost stratum in the current geological section as the target stratum to be restored to the ancient water depth, and any of the above-mentioned methods for determining the baseline of the target stratum to be restored to the ancient water depth;

[0033] A balanced profile recovery module is used to use the balanced profile technology to peel back the uppermost stratum in the geological profile, flatten the baseline, and obtain the structural development evolution history profile of the target stratum during the deposition period as a new geological profile;

[0034] The judgment module is used to judge whether the current geological profile is balanced; if the judgment module judges that it is not balanced, the structural interpretation module is used to re-execute: performing structural interpretation of the selected seismic profile in the shelf-slope area to obtain an initial geological profile; if the judgment module judges that it is yes, the baseline determination module is used to continue to determine the baseline according to the current geological profile until there is only one sedimentary stratum in the current geological profile.

[0035] In a fifth aspect, an embodiment of the present invention provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and when the computer executable instructions are executed by a processor, the computer storage medium implements any of the above-mentioned methods for determining the ancient water depth baseline to be restored in the shelf-slope area, or implements any of the above-mentioned methods for restoring the equilibrium profile in the shelf-slope area.

[0036] In a sixth aspect, an embodiment of the present disclosure provides a server, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, it implements any of the above-mentioned methods for determining the ancient water depth baseline to be restored in the shelf-slope area, or implements any of the above-mentioned methods for restoring the equilibrium profile in the shelf-slope area.

[0037] The beneficial effects of the above technical solution provided by the embodiment of the present invention include at least:

[0038] (1) The method for determining the baseline of the ancient water depth to be restored in the shelf-slope area provided in the embodiment of the present invention determines the control point of the ancient water depth to be restored according to the morphology of the overlying strata of the target stratum in the geological section, and the overlying strata are the uppermost strata in the geological section; the corresponding point of the control point is determined in the target stratum, and the benchmark point is obtained according to the difference between the water depth at the control point and the vertical apparent thickness of the target stratum at the corresponding point; the baseline of the ancient water depth to be restored in the target stratum is obtained based on the benchmark point. This method is suitable for the restoration of ancient water depth in the shelf-slope area of ​​an under-supplemented open terrestrial margin marine sedimentary basin. It uses the inheritance principle of the development of shelf-slope sedimentary strata, and calculates the baseline of the ancient water depth to be restored by subtracting the current water depth and the vertical apparent thickness of the sedimentary strata, which provides a reliable layer flattening baseline for the restoration of tectonic sedimentary deformation and improves the accuracy of balanced profile restoration.

[0039] (2) The method for determining the paleo-water depth baseline to be restored in the shelf-slope area provided in the embodiment of the present invention utilizes the inheritance principle of the development of shelf-slope sedimentary strata, and calculates the paleo-water depth baseline to be restored by subtracting the present water depth from the vertical apparent thickness of the sedimentary strata; by back-stripping the strata using the balanced profile technology and flattening the paleo-water depth baseline layer, the structural evolution of the shelf-slope sedimentary strata in the under-supplemented open land margin marine sedimentary basin can be accurately restored in a reasonable, accurate and efficient manner. This method provides a reliable paleo-water depth baseline with a geological theoretical basis, solves the inapplicability and blindness of conventional methods, and greatly improves accuracy and work efficiency.

[0040] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0041] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0043] Figure 1 This is a flow chart of a method for determining a paleo-water depth baseline to be restored in a shelf-slope region in Embodiment 1 of the present invention;

[0044] Figure 2A schematic diagram of determining a paleo-water depth baseline to be restored for a geological section in the first embodiment of the present invention;

[0045] Figure 3 This is a flow chart of the method for restoring the equilibrium profile of the shelf-slope region in the second embodiment of the present invention;

[0046] Figure 4a This is a current cross section in the second embodiment of the present invention;

[0047] Figure 4b for Figure 4a Compaction recovery during the deposition period of layer L2 in the middle section;

[0048] Figure 4c for Figure 4b The paleo-water depth of L2 layer is flattened on the basis;

[0049] Figure 4d for Figure 4c Compaction recovery during the deposition period of L1 layer on the foundation;

[0050] Figure 4e for Figure 4d The paleo-water depth of L1 layer is flattened on the basis;

[0051] Figure 4f for Figure 4e Compaction recovery during the sedimentation period of the underlying layer on the foundation;

[0052] Figure 4g for Figure 4f The bottom paleo-water depth on the foundation is leveled;

[0053] Figure 5 It is a schematic diagram of the structure of a device for determining a paleo-water depth baseline to be restored in a shelf-slope region according to an embodiment of the present invention;

[0054] Figure 6 It is a schematic diagram of the structure of the shelf-slope region equilibrium profile recovery device in an embodiment of the present invention. DETAILED DESCRIPTION

[0055] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0056] It should be understood that the terms described in the present invention are only for describing special embodiments and are not intended to limit the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which the present invention belongs. Although the present invention only describes preferred methods and materials, any methods and materials similar or equivalent to those described herein may also be used in the implementation or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe methods and / or materials related to the documents. In the event of conflict with any incorporated document, the content of this specification shall prevail.

[0057] The embodiment of the present invention provides a method and device for determining a paleo-water depth baseline to be restored in a shelf-slope area and related methods, and utilizes the inheritance principle of shelf-slope sedimentary strata development to calculate a paleo-water depth baseline to be restored by subtracting the present water depth from the vertical apparent thickness of the sedimentary strata, thereby providing a reliable layer-leveling baseline for restoration of tectonic sedimentary deformation and improving the accuracy of equilibrium profile restoration.

[0058] Embodiment 1

[0059] Embodiment 1 of the present invention provides a method for determining a paleo-water depth baseline to be restored in a shelf-slope region, and the process thereof is as follows: Figure 1 As shown, the following steps are included:

[0060] Step S11: Determine the control point for restoring the ancient water depth according to the overlying stratum morphology of the target stratum in the geological section.

[0061] It should be noted that the overlying stratum here is the uppermost stratum in the geological section, that is, the paleo-water depth can only be restored for the underlying stratum of the uppermost stratum in the geological section. If it is necessary to further restore the paleo-water depth of the sedimentary period of the underlying stratum, it is necessary to restore them one by one by using a layer-by-layer stripping method, and the details can be referred to the introduction in the subsequent Example 2.

[0062] In some embodiments, the control points for recovering the paleo-water depth may be first determined at at least the following positions of the overlying strata of the target strata in the geological section:

[0063] The continental shelf area, the transition zone between the continental shelf and the continental slope, the inflection point area of ​​the continental slope, and the transition zone between the continental slope and the seabed.

[0064] Optionally, control points can be appropriately increased according to the complexity of the profile slope changes.

[0065] If the overlying strata have abnormal structures, the control points for restoring the ancient water depth can be further determined at the corresponding positions of the abnormal structures. For example, if faults are developed, at least one control point can be added at the breakpoints of the upper and lower plates; if folds are developed, one control point can be added at the inflection point of the slope.

[0066] See also Figure 2 As shown in the figure, the L1 formation is the target formation for restoring the ancient water depth, the L2 formation is the overlying formation of the L1 formation, the control point A is determined in the shelf area of ​​the L2 formation, the control point B is determined at the shelf slope break (i.e., the transition area between the shelf and the slope), the control point C is determined in the inflection point area of ​​the slope, and the control point D is determined in the transition area between the slope and the seabed.

[0067] Step S12: Determine the corresponding point of the control point in the target stratum, and obtain the reference point according to the difference between the water depth at the control point and the vertical apparent thickness of the target stratum at the corresponding point.

[0068] According to the law of forward migration of the continental slope over time, points matching the morphology of the control points are determined in the target stratum as corresponding points of the control points.

[0069] See also Figure 2 As shown, since the slope changes in the shelf area and the seabed are extremely small, the corresponding point A' is determined directly below the control point A, and the corresponding point D' is determined directly below the control point D; the corresponding point B' of the control point B is determined in the transition area between the shelf and the slope of the L1 formation, and the corresponding point C' of the control point C is determined in the inflection point area of ​​the slope of the L1 formation.

[0070] Accordingly, if the control point is at a typical construction position, the corresponding point of the control point is at the corresponding construction position.

[0071] Measure the present water depth (present water depth of the top of L2 formation) (a, b, c, d, etc.) of each control point (A, B, C, D, etc.) and the vertical apparent thickness of the formation below the corresponding point (A`, B`, C`, D`, etc.) (such as a`, b`, c`, d`, etc.), subtract the vertical apparent thickness of the formation (a-a', bb`, cc`, dd`) from the present water depth to form the ancient water depth benchmark point to be restored for each point (A`, B`, C`, D`, etc.).

[0072] Step S13: obtaining a baseline for restoring the ancient water depth of the target stratum based on the benchmark point.

[0073] Based on the benchmark points, the baseline for restoring the ancient water depth of the target stratum is obtained through a smooth transition method.

[0074] See also Figure 2 As shown, the benchmark points of control points A, B, C, and D are smoothly connected to obtain the paleo-water depth restoration benchmark line during the L1 formation deposition period.

[0075] The method for determining the baseline of the ancient water depth to be restored in the shelf-slope area provided in the first embodiment of the present invention determines the control point of the ancient water depth to be restored according to the morphology of the overlying strata of the target stratum in the geological section, and the overlying strata are the uppermost strata in the geological section; the corresponding point of the control point is determined in the target stratum, and the benchmark point is obtained according to the difference between the water depth at the control point and the vertical apparent thickness of the target stratum at the corresponding point; the baseline of the ancient water depth to be restored in the target stratum is obtained based on the benchmark point. This method is suitable for the restoration of ancient water depth in the shelf-slope area of ​​an under-supplemented open terrestrial marginal marine sedimentary basin. It uses the inheritance principle of the development of shelf-slope sedimentary strata, and calculates the baseline of the ancient water depth to be restored by subtracting the current water depth and the vertical apparent thickness of the sedimentary strata, which provides a reliable layer leveling baseline for the restoration of tectonic sedimentary deformation of the stratum and improves the accuracy of the restoration of the equilibrium profile.

[0076] Embodiment 2

[0077] Embodiment 2 of the present invention provides a method for restoring a balanced profile in a shelf-slope region, and the process thereof is as follows: Figure 3 As shown, the following steps are included:

[0078] Step S31: Perform structural interpretation of the selected seismic profile in the shelf-slope region to obtain an initial geological profile.

[0079] First, a typical regional depth seismic profile is selected for making the balanced profile, and the layer is calibrated according to drilling and other data to complete the detailed interpretation of the seismic profile layer and fault.

[0080] Step S32: Taking the underlying stratum of the uppermost stratum in the current geological profile as the target stratum for restoration of the ancient water depth, determine the baseline of the target stratum for restoration of the ancient water depth.

[0081] The specific method for determining the baseline is described in Example 1 and will not be repeated here.

[0082] Step S33: Using the balanced profile technology, peel back the uppermost stratum in the geological profile, flatten the baseline, and obtain the structural development evolution history profile of the target stratum during the deposition period as a new geological profile.

[0083] Step S34: Verify whether the current geological profile is balanced.

[0084] Verify whether the current geological profile is consistent with the geological understanding. If not, return to step S31, re-interpret the structure, and adjust and modify the original interpretation results based on the new geological understanding; if yes, return to step S32 and continue the paleogeographic restoration of the next stratum until there is only one sedimentary stratum in the current geological profile.

[0085] Step S35: Determine that there is only one sedimentary stratum in the current geological profile.

[0086] The method for determining the paleo-water depth baseline to be restored in the shelf-slope area provided in the second embodiment of the present invention utilizes the inheritance principle of the development of shelf-slope sedimentary strata, and calculates the paleo-water depth baseline to be restored by subtracting the present water depth from the vertical apparent thickness of the sedimentary strata; by stripping back the strata using the balanced profile technology, the paleo-water depth baseline layer is flattened, and the structural evolution of the shelf-slope sedimentary strata in the under-supplemented open land margin marine sedimentary basin can be accurately restored in a reasonable, accurate and efficient manner. This method provides a reliable paleo-water depth baseline with a geological theoretical basis, solves the inapplicability and blindness of conventional methods, and greatly improves accuracy and work efficiency.

[0087] See also Figure 4a-4g The figure shows an example of balanced profile restoration based on the paleo-water depth baseline in the shelf-slope region. Figure 4a For the current cross section, Figure 4b It is the compaction recovery of L2 layer during deposition period. Figure 4c The paleo-water depth of L2 layer is flattened. Figure 4d It is the compaction recovery during the deposition period of L1 layer. Figure 4e The paleo-water depth of L1 layer is flattened. Figure 4f The compaction recovery during the bottom sedimentation period. Figure 4g To level out the bottom paleo-water depth.

[0088] Based on the inventive concept of the present invention, an embodiment of the present invention further provides a device for determining a paleo-water depth baseline to be restored in a shelf-slope region. The structure of the device is as follows: Figure 5 As shown, including:

[0089] A control point determination module 51 is used to determine the control point to be restored to the ancient water depth according to the overlying stratum morphology of the target stratum in the geological section, wherein the overlying stratum is the uppermost stratum in the geological section;

[0090] A reference point determination module 52 is used to determine a corresponding point of a control point in the target stratum, and obtain a reference point according to a difference between the water depth at the control point and the vertical apparent thickness of the target stratum at the corresponding point;

[0091] The baseline determination module 53 is used to obtain the baseline of the target stratum to be restored ancient water depth based on the benchmark point.

[0092] In some embodiments, the control point determination module 51 determines the control point to be restored to the ancient water depth according to the overlying stratum morphology of the target stratum in the geological section, and is used to:

[0093] The control points for restoring the ancient water depth are determined at at least the following positions of the overlying strata of the target strata in the geological section: the shelf area, the transition area between the shelf and the slope, the inflection point area of ​​the slope, and the transition area between the slope and the seabed.

[0094] In some embodiments, the control point determination module 51, which determines the control point to be restored ancient water depth according to the overlying stratum morphology of the target stratum in the geological section, is also used to:

[0095] If abnormal structures develop in the overlying strata, the control points for restoring the ancient water depth shall be determined at the corresponding positions of the abnormal structures.

[0096] In some embodiments, the reference point determination module 52 determines the corresponding points of the control points in the target formation for:

[0097] According to the law of the forward migration of the continental slope with time evolution, points matching the morphology of the control points are determined in the target stratum as corresponding points of the control points.

[0098] In some embodiments, the baseline determination module 53, which obtains the baseline of the target stratum to be restored paleo-water depth based on the benchmark point, is used to:

[0099] Based on the benchmark points, a benchmark line for restoring the ancient water depth of the target stratum is obtained by a smooth transition method.

[0100] Based on the inventive concept of the present invention, an embodiment of the present invention further provides a shelf-slope region equilibrium profile restoration device, the structure of which is as follows: Figure 6 As shown, including:

[0101] The structural interpretation module 61 is used to perform structural interpretation of the selected seismic profile in the shelf-slope area to obtain an initial geological profile;

[0102] The baseline determination module 62 is used to determine the baseline of the target stratum to be restored to the ancient water depth by taking the underlying stratum of the uppermost stratum in the current geological section as the target stratum to be restored to the ancient water depth according to any of the above-mentioned methods for determining the baseline of the target stratum to be restored to the ancient water depth;

[0103] The balanced profile recovery module 63 is used to use the balanced profile technology to peel back the uppermost stratum in the geological profile, flatten the baseline, and obtain the structural development evolution history profile of the target stratum during the deposition period as a new geological profile;

[0104] The judgment module 64 is used to judge whether the current geological profile is balanced; if the judgment module 64 judges to be no, the structural interpretation module 61 is used to re-execute: perform structural interpretation of the selected seismic profile in the shelf-slope area to obtain an initial geological profile; if the judgment module 64 judges to be yes, the baseline determination module 62 is used to continue to determine the baseline according to the current geological profile until there is only one sedimentary stratum in the current geological profile.

[0105] In some embodiments, the determination module 64, the verification of whether the current geological profile is balanced, is used to:

[0106] Verify whether the current geological profile is consistent with geological understanding.

[0107] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0108] Based on the inventive concept of the present invention, an embodiment of the present invention further provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and when the computer executable instructions are executed by a processor, any of the above-mentioned shelf-slope region equilibrium profile restoration methods can be implemented.

[0109] Based on the inventive concept of the present invention, an embodiment of the present invention also provides a server, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, any of the above-mentioned shelf-slope region equilibrium profile recovery methods is implemented.

[0110] Unless otherwise specifically stated, terms such as processing, computing, calculating, determining, displaying, etc. may refer to the actions and / or processes of one or more processing or computing systems, or similar devices, which operate and convert data represented as physical (e.g., electronic) quantities within registers or memories of a processing system into other data similarly represented as physical quantities within memories, registers, or other such information storage, transmission, or display devices of the processing system. Information and signals may be represented using any of a variety of different techniques and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips mentioned throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, light fields or particles, or any combination thereof.

[0111] It should be understood that the specific order or hierarchy of steps in the disclosed process is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process can be rearranged without departing from the scope of protection of the present disclosure. The attached method claims present the elements of the various steps in an exemplary order and are not intended to be limited to the specific order or hierarchy described.

[0112] In the above detailed description, various features are grouped together in a single embodiment to simplify the disclosure. This method of disclosure should not be interpreted as reflecting an intention that an embodiment of the claimed subject matter requires more features than those set forth in each claim. On the contrary, as reflected in the appended claims, the invention is in a state of having less than all the features of the disclosed individual embodiments. Therefore, the appended claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.

[0113] Those skilled in the art will also appreciate that the various illustrative logic blocks, modules, circuits, and algorithmic steps described in conjunction with the embodiments herein can all be implemented as electronic hardware, computer software, or a combination thereof. In order to clearly illustrate the interchangeability between hardware and software, various illustrative components, blocks, modules, circuits, and steps are generally described above around their functions. Whether such functions are implemented as hardware or software depends on specific applications and the design constraints imposed on the entire system. A skilled person can implement the described functions in an alternative manner for each specific application, but such implementation decisions should not be interpreted as departing from the scope of protection of the present disclosure.

[0114] The steps of the method or algorithm described in conjunction with the embodiments herein may be directly embodied as hardware, a software module executed by a processor, or a combination thereof. The software module may be located in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a mobile disk, a CD-ROM, or any other form of storage medium well known in the art. An exemplary storage medium is connected to the processor so that the processor can read information from the storage medium and can write information to the storage medium. Of course, the storage medium may also be an integral part of the processor. The processor and the storage medium may be located in an ASIC. The ASIC may be located in a user terminal. Of course, the processor and the storage medium may also be present in a user terminal as discrete components.

[0115] For software implementation, the techniques described in this application can be implemented with modules (e.g., procedures, functions, etc.) that perform the functions described in this application. These software codes can be stored in a memory unit and executed by a processor. The memory unit can be implemented within the processor or outside the processor. In the latter case, it is coupled to the processor in a communication manner via various means, which are well known in the art.

[0116] The above description includes examples of one or more embodiments. Of course, it is impossible to describe all possible combinations of components or methods for the purpose of describing the above embodiments, but it should be recognized by those skilled in the art that the various embodiments may be further combined and arranged. Therefore, the embodiments described herein are intended to cover all such changes, modifications and variations that fall within the scope of protection of the appended claims. In addition, with respect to the term "comprising" used in the specification or claims, the word is covered in a manner similar to the term "including", just as "including," is explained as a transitional word in the claims. In addition, any term "or" used in the specification of the claims is intended to mean "non-exclusive or".

Claims

1. A method for determining the baseline of paleo-water depth to be restored in the shelf-slope region, characterized in that: include: Determine the control point for restoring the ancient water depth according to the overlying stratum morphology of the target stratum in the geological section, wherein the overlying stratum is the uppermost stratum in the geological section; Determine a corresponding point of the control point in the target stratum, and obtain a reference point according to the difference between the water depth at the control point and the vertical apparent thickness of the target stratum at the corresponding point; A baseline for restoring the ancient water depth of the target stratum is obtained based on the benchmark points.

2. The method according to claim 1, characterized in that The control points for recovering the ancient water depth are determined according to the overlying stratum morphology of the target stratum in the geological section, including: The control points for the restoration of paleo-water depth are determined at least at the following positions of the overlying strata of the target strata in the geological section: The continental shelf area, the transition zone between the continental shelf and the continental slope, the inflection point area of ​​the continental slope, and the transition zone between the continental slope and the seabed.

3. The method according to claim 2, characterized in that The method of determining the control point for restoring the ancient water depth according to the overlying stratum morphology of the target stratum in the geological section also includes: If abnormal structures develop in the overlying strata, the control points for restoring the ancient water depth shall be determined at the corresponding positions of the abnormal structures.

4. The method according to claim 2, characterized in that The step of determining corresponding points of control points in the target stratum includes: According to the law of the forward migration of the continental slope with time evolution, points matching the morphology of the control points are determined in the target stratum as corresponding points of the control points.

5. The method according to claim 1, characterized in that The method of obtaining a baseline of the target stratum to be restored ancient water depth based on the benchmark point includes: Based on the benchmark points, a benchmark line for restoring the ancient water depth of the target stratum is obtained by a smooth transition method.

6. A method for restoring a balanced profile in a shelf-slope region, characterized in that: include: The structural interpretation step is to conduct structural interpretation of the selected seismic sections in the shelf-slope area to obtain the initial geological section; A baseline determination step, taking the underlying stratum of the uppermost stratum in the current geological section as the target stratum for restoration of the ancient water depth, and determining the baseline of the target stratum for restoration of the ancient water depth according to the method described in any one of claims 1 to 5; A balanced profile recovery step, using a balanced profile technique to peel back the uppermost stratum in the geological profile, flatten the baseline, and obtain a structural development evolution history profile of the target stratum during its deposition period as a new geological profile; Verify whether the current geological profile is balanced; if not, return to the structural interpretation step; if so, return to the baseline determination step until there is only one sedimentary stratum in the current geological profile.

7. The method according to claim 6, characterized in that The verification of whether the current geological profile is balanced includes: Verify whether the current geological profile is consistent with geological understanding.

8. A device for determining the baseline of paleo-water depth to be restored in the shelf-slope region, characterized in that: include: A control point determination module, used to determine the control point to be restored ancient water depth according to the overlying stratum morphology of the target stratum in the geological section, wherein the overlying stratum is the uppermost stratum in the geological section; A reference point determination module, used to determine the corresponding point of the control point in the target stratum, and obtain the reference point according to the difference between the water depth at the control point and the vertical apparent thickness of the target stratum at the corresponding point; The baseline determination module is used to obtain the baseline of the target stratum to be restored ancient water depth based on the benchmark point.

9. A device for restoring a balanced profile in a shelf-slope region, characterized in that: include: The structural interpretation module is used to interpret the structure of the selected seismic profiles in the shelf-slope area and obtain the initial geological profiles; A baseline determination module, for determining a baseline for restoring the ancient water depth of the target stratum by taking the underlying stratum of the uppermost stratum in the current geological section as the target stratum for restoring the ancient water depth according to the method described in any one of claims 1 to 5; A balanced profile recovery module is used to use the balanced profile technology to peel back the uppermost stratum in the geological profile, flatten the baseline, and obtain the structural development evolution history profile of the target stratum during the deposition period as a new geological profile; The judgment module is used to judge whether the current geological profile is balanced; if the judgment module judges that it is not balanced, the structural interpretation module is used to re-execute: performing structural interpretation of the selected seismic profile in the shelf-slope area to obtain an initial geological profile; if the judgment module judges that it is yes, the baseline determination module is used to continue to determine the baseline according to the current geological profile until there is only one sedimentary stratum in the current geological profile.

10. A computer storage medium, characterized in that: The computer storage medium stores computer executable instructions, and when the computer executable instructions are executed by a processor, the method according to any one of claims 1 to 7 is implemented.

11. A server, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method according to any one of claims 1 to 7 when executing the program.

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