Complex fault block area ancient landform recovery method and system based on construction back-stripping

Abstract

The invention belongs to the technical field of oil and gas exploration and development, and relates to a complex fault block area ancient landform recovery method and system based on structural back-stripping, and the method comprises the steps: obtaining a structural map of a to-be-recovered target layer, recognizing faults in the structural map, and carrying out the sequential numbering of the faults according to a set direction, and obtaining a numbered structural map; recovering the vertical fault displacement of each fault according to the calculated vertical fault displacement breaking block of each fault in the numbering structure diagram, and recovering the horizontal fault displacement of each fault according to the measured horizontal fault displacement segmentation block of each fault in the numbering structure diagram; and setting a reference surface, respectively calculating a distance TR from the top surface structure map after fault displacement recovery to the reference surface and a distance BR from the bottom surface structure map after fault displacement recovery to the reference surface, and subtracting the distance TR from the distance BR to obtain a compacted ancient landform curved surface. The method quantitatively recovers the ancient landform of the target stratum in the deposition period, and can effectively know the prediction of the deposition system and the prediction of the hydrocarbon generation center.

Description

Technical Field

[0001] The present invention belongs to the technical field of oil and gas exploration and development, and relates to paleo-geomorphology restoration technology, and in particular to a paleo-geomorphology restoration method and system for complex fault block areas based on tectonic backstripping. Background Art

[0002] Paleogeomorphic reconstruction techniques play an important role in sedimentary basin analysis. By studying the geomorphic environment and its changes over geological history, they provide key support for oil and gas exploration and development. In particular, they offer important guidance on provenance direction, spatial variations in sedimentary areas and centers, sedimentary facies distribution, source rock development, reservoir distribution, and oil and gas migration and accumulation.

[0003] Existing paleogeomorphology restoration methods can be divided into the following categories: Stratum thickness-based methods, such as the impression method and the residual thickness method, infer paleogeomorphological features by analyzing changes in stratum thickness. Sequence stratigraphic methods, such as the layer flattening method, restore landforms through the geometry and relationships of stratigraphic sequences. Sedimentary methods reconstruct paleogeomorphology through the transformation characteristics of sedimentary phases. Basin simulation methods simulate and restore landforms based on three-dimensional geological models. Seismic geomorphology methods depict paleogeomorphology through seismic slicing technology.

[0004] While these methods have demonstrated considerable application value in paleogeomorphological reconstruction, they still face significant limitations in complex fault-block areas. Due to the development of faults in these areas, the target stratum is split horizontally into multiple distinct blocks, each with varying horizontal and vertical fault throws. However, current restoration methods struggle to effectively address the fault throws caused by fault activity in complex fault-block areas, resulting in low paleogeomorphological reconstruction accuracy. This limited accuracy directly impacts reservoir development and the effectiveness of oil and gas accumulation in complex fault-block areas, thereby reducing their practical application value in oil and gas exploration. Summary of the Invention

[0005] In response to the above-mentioned problems of low accuracy in paleo-geomorphological restoration in the prior art, the present invention provides a paleo-geomorphological restoration method and system for complex fault block areas based on structural backstripping, which can improve the accuracy of paleo-geomorphological restoration in complex fault block areas and provide a scientific basis for reservoir development prediction and oil and gas accumulation research.

[0006] In order to achieve the above-mentioned object, the present invention provides a method for paleo-geomorphological restoration of complex fault-block areas based on tectonic backstripping, the steps of which are as follows: Data acquisition step: acquiring a structural map of the target layer to be restored, wherein the structural map includes a top surface structural map and a bottom surface structural map; Fault numbering step: identifying the faults in the structural map and sequentially numbering the faults in the set direction to obtain a numbered structural map; Fault throw recovery step: according to the calculated vertical fault throw of each fault in the numbered structural map, the vertical fault throw of each fault is divided into blocks to recover the vertical fault throw of each fault; according to the measured horizontal fault throw of each fault in the numbered structural map, the horizontal fault throw of each fault is divided into blocks to recover the horizontal fault throw of each fault; Paleomorphological restoration steps: set a reference surface, calculate the distance TR from the top surface structural map after fault throw restoration to the reference surface, and the distance BR from the bottom surface structural map after fault throw restoration to the reference surface, and subtract the distance TR from the distance BR to obtain the compacted paleomorphological surface.

[0007] In some embodiments, the step of removing abnormal points is also included: removing abnormal points in the compacted paleo-geomorphological surface, wherein the abnormal points are points that are obviously inconsistent with the trend.

[0008] In some embodiments, a compaction correction step is also included: the compression coefficient of the target layer is calculated based on the porosity of the stratum during deposition and the porosity of the target layer, and the calculated compression coefficient is multiplied by the paleo-geomorphological surface to obtain the paleo-geomorphology after compaction correction.

[0009] In some embodiments, in the slice numbering step, a method for identifying slices in the structural map is: Graphics construction steps: construct a fault polygon plane graphic, and construct a top polygon layer and a bottom polygon layer in the plane graphic; Copying steps: copy the fault polygons in the top surface structure map to the top surface polygon layer, and copy the polygons in the bottom surface structure map to the bottom surface polygon layer; Identification steps: Among the top fault polygons and bottom fault polygons, fault polygons with similar lengths and positions are regarded as the same fault.

[0010] In some embodiments, in the slice numbering step, a method for sequentially numbering the slices according to a set direction to obtain a numbered structural map is as follows: Layer construction steps: construct a fault number layer in the plane graphic; Numbering step: Sequentially number the identified faults according to the set direction and place them in the fault number layer; Copying step: copy the fault number layer after placing the number to the top surface structure map and the bottom surface structure map to obtain the coded structure map.

[0011] In some embodiments, the step of recovering the fault distance includes: Vertical fault throw recovery steps: Calculate the vertical fault throw of each fault in the structural map, divide the fault blocks according to the vertical distance calculated for each fault, and recover the vertical fault throw of each fault; Horizontal fault throw recovery steps: measure the horizontal fault throw of a certain fault in the structural map, and recover the horizontal fault throw of each fault according to the measured horizontal fault throw segment blocks.

[0012] In some embodiments, in the vertical throw recovery step, the method for calculating the vertical throw of the fault is as follows: for the i-th fault, the values of the corresponding points on the hanging wall and the footwall on both sides of the i-th fault are taken, and the vertical throw of the i-th fault is obtained by subtracting the corresponding point value on the hanging wall from the corresponding point value on the footwall; The method for recovering the vertical fault distance of the fault by dividing the fault blocks according to the vertical distance calculated by the fault is as follows: for the i-th fault, fix the extreme edges of the two adjacent set directions, and move all the fault blocks of the i-th fault in the direction opposite to the set direction upward in the vertical direction to recover the vertical fault distance of the i-th fault by the calculated vertical fault distance.

[0013] In some embodiments, in the horizontal fault throw recovery step, the method for measuring the horizontal fault throw of the fault in the structural map is: for the i-th fault, directly measuring the horizontal fault throw of the i-th fault on the top surface structural map; The method for restoring the horizontal fault throw of the fault according to the measured horizontal fault throw segment blocks is as follows: for the i-th fault, fix the two adjacent edges of the set direction, and move all the fault blocks of the i-th fault in the opposite direction to the set direction in the direction perpendicular to the i-th fault to measure the horizontal fault throw distance of the i-th fault.

[0014] In a second aspect, the present invention provides a paleo-geomorphology restoration system for complex fault-block areas based on tectonic backstripping, which is used to implement the paleo-geomorphology restoration method for complex fault-block areas based on tectonic backstripping described in the first aspect of the present invention, comprising: A data acquisition module, which acquires a structural diagram of the target layer to be restored; The fault numbering module identifies the faults in the structural map and sequentially numbers the faults in the set direction to obtain a numbered structural map; The fault distance recovery module calculates the vertical fault distance and horizontal fault distance of each fault in the numbered structural diagram, divides the fault blocks according to the vertical distance of each fault to restore the vertical fault distance of each fault, and divides the fault blocks according to the horizontal fault distance of each fault to restore the horizontal fault distance of each fault; The paleo-geomorphology restoration module sets a reference surface and calculates the distance TR from the top surface structural map after fault throw restoration to the reference surface and the distance BR from the bottom surface structural map after fault throw restoration to the reference surface. The compacted paleo-geomorphology surface is obtained by subtracting the distance TR from the distance BR.

[0015] In some embodiments, it also includes an abnormal point removal module and a compaction correction module. The abnormal point removal module is used to remove abnormal points in the compacted paleo-geomorphological surface; the compaction correction module is used to calculate the compression coefficient of the target layer based on the porosity of the stratum during deposition and the porosity of the target layer, and multiply the calculated compression coefficient by the paleo-geomorphological surface to obtain the paleo-geomorphology after compaction correction.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are: (1) The paleogeomorphological restoration method and system for complex fault block areas based on tectonic backstripping provided by the present invention fully considers the vertical and horizontal fault throws of the faults when restoring the paleogeomorphology in complex fault block areas, calculates and measures the horizontal and vertical fault throws of each fault at the same time, and quantitatively restores the horizontal and vertical fault throws of each fault according to a certain order, thereby obtaining a quantitative representation map of the paleogeomorphology in the geological history period, eliminating the influence of the vertical and horizontal fault throws of the faults on the paleogeomorphology, improving the accuracy of paleogeomorphological restoration during the deposition period of the target layer, and achieving high accuracy of paleogeomorphological restoration.

[0017] (2) The paleogeomorphology restoration method and system for complex fault block areas based on tectonic backstripping provided by the present invention also eliminates abnormal points in the paleogeomorphology after fault throw restoration, removing abnormal points caused by slight differences in the range of different surfaces, sampling intervals, etc., and further improving the accuracy of paleogeomorphology restoration during the deposition period of the target layer.

[0018] (3) The paleogeomorphology restoration method and system for complex fault block areas based on tectonic backstripping provided by the present invention also takes into account the influence of sedimentary compaction on paleogeomorphology, and performs compaction correction on the paleogeomorphology after fault throw restoration, thereby further improving the accuracy of paleogeomorphology restoration during the deposition period of the target layer and being able to more accurately restore the paleogeomorphology during the deposition period of the target layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a flow chart of the paleo-geomorphological restoration method for complex fault-block areas based on tectonic backstripping according to the embodiment of the first aspect of the present invention; Figure 2 This is a flowchart of a method for identifying faults in a structural diagram according to an embodiment of the present invention; Figure 3 A flowchart of a method for sequentially numbering faults according to a set direction to obtain a numbered structural map according to an embodiment of the present invention; Figure 4 This is a flow chart of fault recovery according to an embodiment of the present invention; Figure 5 This is a structural block diagram of a complex fault block area paleo-geomorphology restoration system based on tectonic backstripping according to an embodiment of the second aspect of the present invention; Figure 6 This is a flow chart of the paleo-geomorphology restoration method for complex fault block areas based on tectonic backstripping according to the third aspect of the present invention; Figure 7 This is a structural block diagram of a complex fault block area paleo-geomorphology restoration system based on tectonic backstripping according to an embodiment of the fourth aspect of the present invention; Figure 8 This is a flow chart of the paleo-geomorphology restoration method for complex fault-block areas based on tectonic backstripping according to the fifth embodiment of the present invention; Figure 9This is a structural block diagram of a complex fault block area paleo-geomorphology restoration system based on tectonic backstripping according to an embodiment of the sixth aspect of the present invention; Figure 10 This is a flow chart of the method for restoring paleo-geomorphology in a complex fault block area based on tectonic backstripping according to the seventh aspect of the present invention; Figure 11 This is a structural block diagram of a complex fault block area paleo-geomorphology restoration system based on tectonic backstripping according to an eighth aspect of the present invention; Figure 12 This is a top surface structural diagram of the target layer in an embodiment of the present invention; Figure 13 for Figure 12 3D display of Figure 14 This is a bottom structural diagram of the target layer according to an embodiment of the present invention; Figure 15 for Figure 14 3D display of Figure 16 A top surface structural diagram of the target layer with fault numbers according to an embodiment of the present invention; Figure 17 This is a bottom structural diagram of the target layer with fault numbers according to an embodiment of the present invention; Figure 18 This is a structural diagram of the top surface of the target layer after the vertical throw of the F1 fault is restored in an embodiment of the present invention; Figure 19 for Figure 18 3D display of Figure 20 This is a structural diagram of the bottom surface of the target layer after the vertical throw of the F1 fault is restored in an embodiment of the present invention; Figure 21 for Figure 20 3D display of Figure 22 This is a three-dimensional display of the top surface structure of the target layer after the vertical fault throws of the F1 fault, F2 fault, and F3 fault are restored; Figure 23 This is a three-dimensional display of the bottom surface structure of the target layer after the vertical fault throws of the F1 fault, F2 fault, and F3 fault are restored; Figure 24 This is a structural diagram of the top surface of the target layer after the horizontal fault throw of the F1 fault is restored in an embodiment of the present invention; Figure 25 This is a structural diagram of the bottom surface of the target layer after the horizontal fault throw of the F1 fault is restored in an embodiment of the present invention; Figure 26 This is a three-dimensional display of the top surface structure of the target layer after the horizontal fault throws of the F1 fault, F2 fault, and F3 fault are restored; Figure 27This is a three-dimensional display of the bottom surface structure of the target layer after the horizontal fault throws of the F1 fault, F2 fault, and F3 fault are restored; Figure 28 This is the paleo-geomorphology map after compaction; Figure 29 This is a statistical relationship diagram between porosity and depth in a certain area; Figure 30 It is the plane distribution map of compaction correction coefficient in a certain area; Figure 31 A compacted and corrected paleo-geomorphological map of a certain area; Figure 32 for Figure 31 3D display of .

[0020] In the figure, 1. Data acquisition module, 2. Fault numbering module, 3. Fault throw recovery module, 4. Paleomorphology recovery module, 5. Abnormal point removal module, 6. Compaction correction module. DETAILED DESCRIPTION

[0021] The present invention is described in detail below by way of exemplary embodiments, but it should be understood that elements, structures, and features of one embodiment may be beneficially combined in other embodiments without further description.

[0022] Due to the development of faults in complex fault block areas, the target layer is divided into multiple different fault blocks on the plane, and there are differences in fault throws in the horizontal and vertical directions between different fault blocks. However, the current restoration method is difficult to effectively solve the fault throw problem caused by fault activity when processing complex fault block areas, resulting in low accuracy in paleogeology restoration. The present invention provides a paleogeology restoration method and system for complex fault block areas based on tectonic backstripping, which fully considers the vertical fault throw and horizontal fault throw of the fault, calculates and measures the horizontal fault throw and vertical fault throw of each fault at the same time, and quantitatively restores the horizontal fault throw and vertical fault throw of each fault according to a certain order, obtaining a quantitative characterization map of paleogeology in the geological history period, eliminating the influence of the vertical fault throw and horizontal fault throw of the fault on the paleogeology, solving the paleogeology plane position error caused by the horizontal fault throw of the fault and the vertical position error caused by the vertical fault throw of the fault, and the paleogeology restoration accuracy is high. The following is a detailed description of a paleogeology restoration method and system for complex fault block areas based on tectonic backstripping provided by the present invention in conjunction with the accompanying drawings.

[0023] See also Figure 1 The first embodiment of the present invention provides a method for restoring ancient landforms in complex fault block areas based on tectonic backstripping, the steps of which are as follows: S1. Data acquisition step: obtaining a structural map of the target layer to be restored, wherein the structural map includes a top surface structural map and a bottom surface structural map.

[0024] S2. Fault numbering step: identifying the faults in the structural map, and sequentially numbering the faults according to a set direction to obtain a numbered structural map.

[0025] Specifically, see Figure 2 , the method for identifying faults in the structural map is: S211, graphics construction step: constructing a fault polygon plane graphic, and constructing a top polygon layer and a bottom polygon layer in the plane graphic; S212, copying step: copying the fault polygons in the top surface structural map to the top surface polygon layer, and copying the polygons in the bottom surface structural map to the bottom surface polygon layer; S213. Identification step: Among the top surface fault polygons and the bottom surface fault polygons, the fault polygons with similar lengths and positions are regarded as the same fault.

[0026] Specifically, see Figure 3 , the method of sequentially numbering the faults according to the set direction to obtain the numbered structural map is: S221, layer construction step: constructing a fault number layer in the plane figure; S222, numbering step: sequentially numbering the identified faults according to the set direction and placing them in the fault numbering layer; S223, copying step: copying the fault number layer after placing the number to the top surface structural map and the bottom surface structural map to obtain a coded structural map.

[0027] S3. Fault throw recovery step: based on the calculated vertical fault throw of each fault in the numbered structural map, the vertical fault throw of each fault is divided into blocks to recover the vertical fault throw of each fault; based on the measured horizontal fault throw of each fault in the numbered structural map, the horizontal fault throw of each fault is divided into blocks to recover the horizontal fault throw of each fault.

[0028] Specifically, in some embodiments, see Figure 4 , the fault recovery step includes: S31. Vertical fault throw recovery step: Calculate the vertical fault throw of each fault in the structural map, divide the fault blocks into blocks according to the vertical distance calculated for each fault, and recover the vertical fault throw of each fault.

[0029] Specifically, the method for calculating the vertical throw of the fault is: for the i-th fault, take the values of the corresponding points on the hanging wall and footwall on both sides of the i-th fault, and subtract the corresponding point value of the footwall from the corresponding point value of the hanging wall to obtain the vertical throw of the i-th fault.

[0030] Specifically, the method for recovering the vertical fault distance of the fault by dividing the fault blocks according to the vertical distance calculated by the fault is as follows: for the i-th fault, fix the extreme edges of the two adjacent set directions, and move all the fault blocks of the i-th fault in the direction opposite to the set direction upward in the vertical direction to recover the vertical fault distance of the i-th fault by the calculated vertical fault distance.

[0031] S32. Horizontal fault throw recovery step: Measure the horizontal fault throw of a certain fault in the structural map, and recover the horizontal fault throw of each fault in sections based on the measured horizontal fault throw.

[0032] Specifically, the method for measuring the horizontal fault throw of a fault in a structural map is as follows: for an i-th fault, the horizontal fault throw of the i-th fault is directly measured on the top surface structural map.

[0033] Specifically, the method for restoring the horizontal fault distance of the fault based on the measured horizontal fault distance segmented blocks is as follows: for the i-th fault, fix the extreme edges of the two adjacent set directions, and move all the fault blocks of the i-th fault in the opposite direction to the set direction in the direction perpendicular to the i-th fault to measure the horizontal fault distance of the i-th fault.

[0034] It should be noted that the order of the above two steps can be interchanged.

[0035] S4. Paleogeomorphological restoration steps: set a reference surface, calculate the distance TR from the top surface structural map after fault throw restoration to the reference surface, and the distance BR from the bottom surface structural map after fault throw restoration to the reference surface, and subtract the distance TR from the distance BR to obtain the compacted paleogeomorphological surface, that is, the restored paleogeomorphology.

[0036] The above-mentioned paleogeomorphological restoration method for complex fault block areas based on tectonic backstripping of the present invention fully considers the vertical fault throw and horizontal fault throw of the fault when restoring the paleogeomorphology in complex fault block areas, and simultaneously calculates and measures the horizontal fault throw and vertical fault throw of each fault, and quantitatively restores the horizontal fault throw and vertical fault throw of each fault according to a certain order, thereby obtaining a quantitative representation map of the paleogeomorphology of the geological history period, eliminating the influence of the vertical fault throw and horizontal fault throw of the fault on the paleogeomorphology, improving the accuracy of paleogeomorphological restoration during the deposition period of the target layer, and achieving high accuracy of paleogeomorphological restoration.

[0037] See also Figure 5 The second embodiment of the present invention provides a complex fault block area paleo-geomorphology restoration system based on tectonic backstripping, which is used to implement the complex fault block area paleo-geomorphology restoration method based on tectonic backstripping described in the first aspect of the present invention, including: Data acquisition module 1, obtains the structural diagram of the target layer to be restored; Fault numbering module 2, identifies faults in the structural map and sequentially numbers the faults in a set direction to obtain a numbered structural map; Fault throw recovery module 3 calculates the vertical fault throw and horizontal fault throw of each fault in the numbered structural diagram, divides the fault blocks according to the vertical distance of each fault to recover the vertical fault throw of each fault, and divides the fault blocks according to the horizontal fault throw of each fault to recover the horizontal fault throw of each fault; Paleomorphological restoration module 4 sets a reference surface, calculates the distance TR from the top surface structural map after fault throw restoration to the reference surface, and the distance BR from the bottom surface structural map after fault throw restoration to the reference surface, and subtracts the distance TR from the distance BR to obtain the compacted paleomorphological surface.

[0038] The above-mentioned complex fault block area paleogeomorphology restoration system based on tectonic backstripping of the present invention fully considers the vertical fault throw and horizontal fault throw of the fault when restoring the paleogeomorphology in the complex fault block area, and simultaneously calculates and measures the horizontal fault throw and vertical fault throw of each fault, and quantitatively restores the horizontal fault throw and vertical fault throw of each fault according to a certain order, thereby obtaining a quantitative representation map of the paleogeomorphology of the geological history period, eliminating the influence of the vertical fault throw and horizontal fault throw of the fault on the paleogeomorphology, improving the paleogeomorphology restoration accuracy during the deposition period of the target layer, and having high accuracy of paleogeomorphology restoration.

[0039] See also Figure 6 The third embodiment of the present invention provides a method for restoring ancient landforms in complex fault block areas based on tectonic backstripping, the steps of which are as follows: S1. Data acquisition step: obtaining a structural map of the target layer to be restored, wherein the structural map includes a top surface structural map and a bottom surface structural map.

[0040] S2. Fault numbering step: identifying the faults in the structural map, and sequentially numbering the faults according to a set direction to obtain a numbered structural map.

[0041] S3. Fault throw recovery step: based on the calculated vertical fault throw of each fault in the numbered structural map, the vertical fault throw of each fault is divided into blocks to recover the vertical fault throw of each fault; based on the measured horizontal fault throw of each fault in the numbered structural map, the horizontal fault throw of each fault is divided into blocks to recover the horizontal fault throw of each fault.

[0042] S4. Paleomorphological restoration step: set a reference surface, calculate the distance TR from the top surface structural map after fault throw restoration to the reference surface, and the distance BR from the bottom surface structural map after fault throw restoration to the reference surface, and subtract the distance TR from the distance BR to obtain the compacted paleomorphological surface.

[0043] S5, abnormal point elimination step: eliminate abnormal points in the paleogeomorphological surface after compaction, and the abnormal points are points that obviously do not conform to the trend. Since the process of calculating the paleogeomorphological surface after compaction involves arithmetic operations on multiple surfaces, there may be slight differences in the range, sampling interval, etc. of different surfaces, which may lead to the appearance of abnormal points. Therefore, the paleogeomorphological surface obtained after paleogeomorphological restoration is subjected to abnormal point elimination, and the abnormal points that obviously do not conform to the trend are deleted. It should be noted that if there are no points that do not conform to the trend, this step can be omitted.

[0044] It should be noted that, in this embodiment, in step S2, the method of identifying the faults in the structural map and sequentially numbering the faults in the set direction to obtain a numbered structural map is the same as the paleogeomorphological restoration method for complex fault block areas based on structural backstripping described in the first embodiment of the present invention, and will not be repeated here. In step S3, the method of calculating the vertical fault throw of the fault and dividing the fault blocks according to the vertical distance calculated by the fault to restore the vertical fault throw of the fault is the same as the paleogeomorphological restoration method for complex fault block areas based on structural backstripping described in the first embodiment of the present invention, and the method of measuring the horizontal fault throw of the fault in the structural map and dividing the fault blocks according to the measured horizontal fault throw to restore the horizontal fault throw of the fault is the same as the paleogeomorphological restoration method for complex fault block areas based on structural backstripping described in the first embodiment of the present invention, and will not be repeated here.

[0045] The above-mentioned paleogeomorphological restoration method for complex fault block areas based on tectonic backstripping of the present invention fully considers the vertical and horizontal fault throws of the faults when restoring the paleogeomorphology in complex fault block areas, calculates and measures the horizontal and vertical fault throws of each fault at the same time, and quantitatively restores the horizontal and vertical fault throws of each fault according to a certain order, thereby obtaining a quantitative characterization map of paleogeomorphology in the geological history period, eliminating the influence of the vertical and horizontal fault throws of the faults on the paleogeomorphology, improving the accuracy of paleogeomorphological restoration during the deposition period of the target layer, and achieving high accuracy in paleogeomorphological restoration. At the same time, when anomalies occur, the anomalies that are obviously inconsistent with the trend are deleted to further improve the accuracy of paleogeomorphological restoration. Compared with the paleogeomorphological restoration method for complex fault block areas based on tectonic backstripping described in the first aspect of the present invention and the paleogeomorphological restoration system for complex fault block areas based on tectonic backstripping described in the second aspect of the present invention, the accuracy of paleogeomorphological restoration is higher.

[0046] See also Figure 7 The fourth embodiment of the present invention provides a complex fault block area paleo-geomorphology restoration system based on tectonic backstripping, which is used to implement the complex fault block area paleo-geomorphology restoration method based on tectonic backstripping described in the third aspect of the present invention, including: Data acquisition module 1, obtains the structural diagram of the target layer to be restored; Fault numbering module 2, identifies faults in the structural map and sequentially numbers the faults in a set direction to obtain a numbered structural map; Fault throw recovery module 3 calculates the vertical fault throw and horizontal fault throw of each fault in the numbered structural diagram, divides the fault blocks according to the vertical distance of each fault to recover the vertical fault throw of each fault, and divides the fault blocks according to the horizontal fault throw of each fault to recover the horizontal fault throw of each fault; Paleomorphological restoration module 4 sets a reference surface, calculates the distance TR from the top surface structural map after fault throw restoration to the reference surface, and the distance BR from the bottom surface structural map after fault throw restoration to the reference surface, and subtracts the distance TR from the distance BR to obtain the compacted paleomorphological surface; The abnormal point elimination module 5 is used to eliminate abnormal points in the compacted paleo-geomorphological surface.

[0047] The above-mentioned complex fault block area paleogeomorphology restoration system based on tectonic backstripping of the present invention fully considers the vertical fault throw and horizontal fault throw of the fault when restoring the paleogeomorphology in the complex fault block area, calculates and measures the horizontal fault throw and vertical fault throw of each fault at the same time, and quantitatively restores the horizontal fault throw and vertical fault throw of each fault according to a certain order, obtains a quantitative characterization map of paleogeomorphology in the geological history period, eliminates the influence of the vertical fault throw and horizontal fault throw of the fault on the paleogeomorphology, improves the accuracy of paleogeomorphology restoration during the deposition period of the target layer, and has high accuracy in paleogeomorphology restoration. At the same time, when anomalies appear, the anomalies that obviously do not conform to the trend are deleted to further improve the accuracy of paleogeomorphology restoration. Compared with the complex fault block area paleogeomorphology restoration method based on tectonic backstripping described in the first aspect of the present invention and the complex fault block area paleogeomorphology restoration system based on tectonic backstripping described in the second aspect of the present invention, the accuracy of paleogeomorphology restoration is higher.

[0048] See also Figure 8 The fifth embodiment of the present invention provides a method for restoring ancient landforms in complex fault block areas based on structural backstripping, the steps of which are as follows: S1. Data acquisition step: obtaining a structural map of the target layer to be restored, wherein the structural map includes a top surface structural map and a bottom surface structural map.

[0049] S2. Fault numbering step: identifying the faults in the structural map, and sequentially numbering the faults according to a set direction to obtain a numbered structural map.

[0050] S3. Fault throw recovery step: based on the calculated vertical fault throw of each fault in the numbered structural map, the vertical fault throw of each fault is divided into blocks to recover the vertical fault throw of each fault; based on the measured horizontal fault throw of each fault in the numbered structural map, the horizontal fault throw of each fault is divided into blocks to recover the horizontal fault throw of each fault.

[0051] S4. Paleomorphological restoration step: set a reference surface, calculate the distance TR from the top surface structural map after fault throw restoration to the reference surface, and the distance BR from the bottom surface structural map after fault throw restoration to the reference surface, and subtract the distance TR from the distance BR to obtain the paleomorphological surface.

[0052] S5. Compaction correction step: Calculate the compression coefficient of the target layer according to the porosity of the stratum during deposition and the porosity of the target layer, and multiply the calculated compression coefficient by the paleo-geomorphological surface to obtain the paleo-geomorphology after compaction correction.

[0053] Specifically, by statistically analyzing the relationship between the porosity of the core and the depth in the well, we established the relationship between the initial porosity and the porosity and depth in the study area. According to existing research results, the porosity of the formation decreases regularly with increasing depth, which can be expressed by the following formula:

[0054] Where, is the porosity of the target layer, is the porosity during stratum deposition, is a constant, is the burial depth of the target layer.

[0055] It is generally believed that the target layer is incompressible during the compaction process. Therefore, the compression coefficient is expressed by the following formula:

[0056] Where, It should be noted that the compression coefficient is a value that changes with the plane position.

[0057] It should be noted that, in this embodiment, in step S2, the method of identifying the faults in the structural map and sequentially numbering the faults in the set direction to obtain a numbered structural map is the same as the paleogeomorphological restoration method for complex fault block areas based on structural backstripping described in the first embodiment of the present invention, and will not be repeated here. In step S3, the method of calculating the vertical fault throw of the fault and dividing the fault blocks according to the vertical distance calculated by the fault to restore the vertical fault throw of the fault is the same as the paleogeomorphological restoration method for complex fault block areas based on structural backstripping described in the first embodiment of the present invention, and the method of measuring the horizontal fault throw of the fault in the structural map and dividing the fault blocks according to the measured horizontal fault throw to restore the horizontal fault throw of the fault is the same as the paleogeomorphological restoration method for complex fault block areas based on structural backstripping described in the first embodiment of the present invention, and will not be repeated here.

[0058] The above-mentioned complex fault block area paleogeomorphology restoration method based on tectonic backstripping of the present invention, when restoring the complex fault block area paleogeomorphology, fully considers the vertical fault throw and horizontal fault throw of the fault, calculates and measures the horizontal fault throw and vertical fault throw of each fault at the same time, and quantitatively restores the horizontal fault throw and vertical fault throw of each fault according to a certain order, obtains a quantitative characterization map of paleogeomorphology in the geological history period, eliminates the influence of the vertical fault throw and horizontal fault throw of the fault on the paleogeomorphology, improves the paleogeomorphology restoration accuracy during the deposition period of the target layer, and the paleogeomorphology restoration accuracy is high. At the same time, the influence of compaction on the paleogeomorphology is also considered, and the paleogeomorphology after fault throw restoration is compacted and corrected, eliminating the influence of compaction on the paleogeomorphology, further improving the accuracy of paleogeomorphology restoration. Compared with the complex fault block area paleogeomorphology restoration method based on tectonic backstripping described in the first aspect of the present invention and the complex fault block area paleogeomorphology restoration system based on tectonic backstripping described in the second aspect of the present invention, the accuracy of paleogeomorphology restoration is higher.

[0059] See also Figure 9 The sixth embodiment of the present invention provides a complex fault block area paleo-geomorphology restoration system based on tectonic backstripping, which is used to implement the complex fault block area paleo-geomorphology restoration method based on tectonic backstripping described in the fifth aspect of the present invention, including: Data acquisition module 1, obtains the structural diagram of the target layer to be restored; Fault numbering module 2, identifies faults in the structural map and sequentially numbers the faults in a set direction to obtain a numbered structural map; Fault throw recovery module 3 calculates the vertical fault throw and horizontal fault throw of each fault in the numbered structural diagram, divides the fault blocks according to the vertical distance of each fault to recover the vertical fault throw of each fault, and divides the fault blocks according to the horizontal fault throw of each fault to recover the horizontal fault throw of each fault; Paleomorphological restoration module 4 sets a reference surface, calculates the distance TR from the top surface structural map after the fault throw is restored to the reference surface, and the distance BR from the bottom surface structural map after the fault throw is restored to the reference surface, and subtracts the distance TR from the distance BR to obtain the paleomorphological surface; The compaction correction module 6 calculates the compression coefficient of the target layer according to the porosity of the stratum during deposition and the porosity of the target layer, and multiplies the calculated compression coefficient by the paleo-geomorphological surface to obtain the paleo-geomorphology after compaction correction.

[0060] The above-mentioned complex fault block area paleogeomorphology restoration system based on tectonic backstripping of the present invention fully considers the vertical fault throw and horizontal fault throw of the fault when restoring the complex fault block area paleogeomorphology, calculates and measures the horizontal fault throw and vertical fault throw of each fault at the same time, and quantitatively restores the horizontal fault throw and vertical fault throw of each fault according to a certain order, obtains a quantitative characterization map of paleogeomorphology in the geological history period, eliminates the influence of the vertical fault throw and horizontal fault throw of the fault on the paleogeomorphology, improves the paleogeomorphology restoration accuracy during the deposition period of the target layer, and has high paleogeomorphology restoration accuracy. At the same time, the influence of compaction on paleogeomorphology is also considered, and the paleogeomorphology after fault throw restoration is subjected to compaction correction, eliminating the influence of compaction on paleogeomorphology, and further improving the accuracy of paleogeomorphology restoration. Compared with the complex fault block area paleogeomorphology restoration method based on tectonic backstripping described in the first aspect of the present invention and the complex fault block area paleogeomorphology restoration system based on tectonic backstripping described in the second aspect of the present invention, the accuracy of paleogeomorphology restoration is higher.

[0061] See also Figure 10 The seventh embodiment of the present invention provides a method for restoring ancient landforms in complex fault block areas based on structural backstripping, the steps of which are as follows: S1. Data acquisition step: obtaining a structural map of the target layer to be restored, wherein the structural map includes a top surface structural map and a bottom surface structural map.

[0062] S2. Fault numbering step: identifying the faults in the structural map, and sequentially numbering the faults according to a set direction to obtain a numbered structural map.

[0063] S3. Fault throw recovery step: based on the calculated vertical fault throw of each fault in the numbered structural map, the vertical fault throw of each fault is divided into blocks to recover the vertical fault throw of each fault; based on the measured horizontal fault throw of each fault in the numbered structural map, the horizontal fault throw of each fault is divided into blocks to recover the horizontal fault throw of each fault.

[0064] S4. Paleomorphological restoration step: set a reference surface, calculate the distance TR from the top surface structural map after fault throw restoration to the reference surface, and the distance BR from the bottom surface structural map after fault throw restoration to the reference surface, and subtract the distance TR from the distance BR to obtain the paleomorphological surface.

[0065] S5, abnormal point elimination step: eliminate abnormal points in the paleogeomorphological surface after compaction, and the abnormal points are points that obviously do not conform to the trend. Since the process of calculating the paleogeomorphological surface after compaction involves arithmetic operations on multiple surfaces, there may be slight differences in the range, sampling interval, etc. of different surfaces, which may lead to the appearance of abnormal points. Therefore, the paleogeomorphological surface obtained after paleogeomorphological restoration is subjected to abnormal point elimination, and the abnormal points that obviously do not conform to the trend are deleted. It should be noted that if there are no points that do not conform to the trend, this step can be omitted.

[0066] S6. Compaction correction step: Calculate the compression coefficient of the target layer according to the porosity of the stratum during deposition and the porosity of the target layer, and multiply the calculated compression coefficient by the paleo-geomorphological surface to obtain the paleo-geomorphology after compaction correction.

[0067] It should be noted that, in this embodiment, in step S2, the method of identifying the faults in the structural map and sequentially numbering the faults in the set direction to obtain a numbered structural map is the same as the paleogeomorphological restoration method for complex fault block areas based on structural backstripping described in the first embodiment of the present invention, and will not be repeated here. In step S3, the method of calculating the vertical fault throw of the fault and dividing the fault blocks according to the vertical distance calculated by the fault to restore the vertical fault throw of the fault is the same as the paleogeomorphological restoration method for complex fault block areas based on structural backstripping described in the first embodiment of the present invention, and the method of measuring the horizontal fault throw of the fault in the structural map and dividing the fault blocks according to the measured horizontal fault throw to restore the horizontal fault throw of the fault is the same as the paleogeomorphological restoration method for complex fault block areas based on structural backstripping described in the first embodiment of the present invention, and will not be repeated here.

[0068] The present invention is a paleogeomorphology restoration method for complex fault-block areas based on tectonic backstripping. When paleogeomorphology is restored in complex fault-block areas, the vertical and horizontal fault throws of the faults are fully considered on the one hand. The horizontal and vertical fault throws of each fault are calculated and measured simultaneously. The horizontal and vertical fault throws of each fault are quantitatively restored according to the block division in a certain order. A paleogeomorphology quantitative characterization diagram of the geological history period is obtained. The influence of the vertical and horizontal fault throws of the faults on the paleogeomorphology is eliminated. The paleogeomorphology restoration accuracy of the target layer deposition period is improved. The paleogeomorphology restoration accuracy is high. On the other hand, when anomalies occur, the anomalies that obviously do not conform to the trend are deleted, thereby further improving the accuracy of paleogeomorphology restoration. On the other hand, the influence of compaction on the paleogeomorphology is also considered. The paleogeomorphology after the fault throw restoration is compacted and corrected, thereby eliminating the influence of compaction on the paleogeomorphology, thereby further improving the accuracy of paleogeomorphology restoration. Compared with the paleogeomorphological restoration method for complex fault block areas based on tectonic backstripping described in the first, third and fifth aspects of the present invention and the paleogeomorphological restoration system for complex fault block areas based on tectonic backstripping described in the second, fourth and sixth aspects of the present invention, the accuracy of paleogeomorphological restoration is higher.

[0069] See also Figure 11 The eighth embodiment of the present invention provides a paleo-geomorphology restoration system for complex fault-block areas based on tectonic backstripping, which is used to implement the paleo-geomorphology restoration method for complex fault-block areas based on tectonic backstripping described in the seventh aspect of the present invention, comprising: Data acquisition module 1, obtains the structural diagram of the target layer to be restored; Fault numbering module 2, identifies faults in the structural map and sequentially numbers the faults in a set direction to obtain a numbered structural map; Fault throw recovery module 3 calculates the vertical fault throw and horizontal fault throw of each fault in the numbered structural diagram, divides the fault blocks according to the vertical distance of each fault to recover the vertical fault throw of each fault, and divides the fault blocks according to the horizontal fault throw of each fault to recover the horizontal fault throw of each fault; Paleomorphological restoration module 4 sets a reference surface, calculates the distance TR from the top surface structural map after the fault throw is restored to the reference surface, and the distance BR from the bottom surface structural map after the fault throw is restored to the reference surface, and subtracts the distance TR from the distance BR to obtain the paleomorphological surface; Anomaly removal module 5 is used to remove abnormal points in the compacted paleo-geomorphological surface; The compaction correction module 6 calculates the compression coefficient of the target layer according to the porosity of the stratum during deposition and the porosity of the target layer, and multiplies the calculated compression coefficient by the paleo-geomorphological surface to obtain the paleo-geomorphology after compaction correction.

[0070] The present invention is a paleogeomorphology restoration method for complex fault-block areas based on tectonic backstripping. When paleogeomorphology is restored in complex fault-block areas, the vertical and horizontal fault throws of the faults are fully considered on the one hand. The horizontal and vertical fault throws of each fault are calculated and measured simultaneously. The horizontal and vertical fault throws of each fault are quantitatively restored according to the block division in a certain order. A paleogeomorphology quantitative characterization diagram of the geological history period is obtained. The influence of the vertical and horizontal fault throws of the faults on the paleogeomorphology is eliminated. The paleogeomorphology restoration accuracy of the target layer deposition period is improved. The paleogeomorphology restoration accuracy is high. On the other hand, when anomalies occur, the anomalies that obviously do not conform to the trend are deleted, thereby further improving the accuracy of paleogeomorphology restoration. On the other hand, the influence of compaction on the paleogeomorphology is also considered. The paleogeomorphology after the fault throw restoration is compacted and corrected, thereby eliminating the influence of compaction on the paleogeomorphology, thereby further improving the accuracy of paleogeomorphology restoration. Compared with the paleogeomorphological restoration method for complex fault block areas based on tectonic backstripping described in the first, third and fifth aspects of the present invention and the paleogeomorphological restoration system for complex fault block areas based on tectonic backstripping described in the second, fourth and sixth aspects of the present invention, the accuracy of paleogeomorphological restoration is higher.

[0071] The effectiveness of the above-mentioned paleogeomorphological restoration method and system for complex fault block areas based on tectonic backstripping will be described below with reference to specific embodiments.

[0072] Example: Take the paleo-geomorphology restoration of the target layer in a certain study area as an example. The restoration steps are as follows: S1. Data acquisition: The top surface structural map of the target layer collected or drawn in a certain study area can be found in Figure 12 and Figure 13 , the bottom surface structure map of the target layer collected or drawn is shown in Figure 14 and Figure 15 .

[0073] S2. Fault numbering: Identify the faults in the top and bottom structural maps, and number the faults in sequence from west to east to obtain a numbered structural map. For the numbered top structural map, see Figure 16 , see the bottom surface structure diagram Figure 17 , Figure 16 、 Figure 17 There are three faults in each of them, numbered as F1 fault, F2 fault and F3 fault.

[0074] S3, fault recovery S31. Vertical fault throw recovery: Read the values of the corresponding points on the hanging wall and footwall on both sides of the F1 fault on the top surface structural map. The value E1 of the corresponding point on the footwall is -3595, and the value E2 of the corresponding point on the hanging wall is -3695. The calculated vertical fault throw of the F1 fault is E1-E2=-3595-(-3695)=100m. Fix the westernmost and northernmost edges of the top surface structural map and the bottom surface structural map of the target layer, and move all fault blocks east or south of the F1 fault vertically upward by a distance of 100m to restore the vertical fault throw of the F1 fault. The top surface structural map of the F1 fault after recovery is shown in the figure. Figure 18 and Figure 19 , the bottom surface structure of F1 fault after restoration can be found in Figure 20 and Figure 21 Then the vertical fault throws of F2 and F3 faults in the top and bottom surface structural maps are restored in sequence to obtain the top surface structural map after the vertical fault throws are restored (see Figure 22 ) and bottom surface structure diagram (see Figure 23 ).

[0075] S32. Horizontal fault throw restoration: Directly measure the horizontal fault throw of F1 fault as 150m on the top surface structural map. Fix the westernmost and northernmost edges of the top surface structural map and bottom surface structural map of the target layer. Move all fault blocks east or south of F1 fault by 150m in the direction perpendicular to F1 fault. The top surface structural map of F1 fault after restoration is shown in Fig. Figure 24 , the bottom surface structure of F1 fault after restoration can be found in Figure 25 Then the horizontal fault throws of F2 and F3 faults in the top and bottom surface structural maps were restored in turn to obtain the top surface structural map after the horizontal fault throws were restored (see Figure 26 ) and bottom surface structure diagram (see Figure 27 ).

[0076] S4. Paleomorphological restoration: Set the reference surface RS to a constant of 0, calculate the distance TR from the top surface structure map after the fault throw restoration to the reference surface RS, and the distance BR from the bottom surface structure map after the fault throw restoration to the reference surface RS, and subtract the distance TR from the distance BR to obtain the paleomorphological surface (see Figure 28 ).

[0077] S5. Compaction correction: By analyzing the relationship between the core porosity data and depth in the well (see Figure 29 ), and the relationship between the initial porosity of the study area and the porosity and depth was established.

[0078]

[0079] The compression coefficient calculation formula is:

[0080] In this embodiment, the initial porosity is set to 49%. is the burial depth of the target layer, which is the Z value in the top surface structure map of the target layer calculated in step S3. The compression coefficient contour map calculated by the compression coefficient calculation formula is shown in Figure 30 .

[0081] Paleogeomorphology after compaction correction can be found in Figure 31 and Figure 32 .

[0082] The above embodiments are used to explain the present invention rather than to limit the present invention. Any modifications and changes made to the present invention within the spirit of the present invention and the protection scope of the claims shall fall within the protection scope of the present invention.

Claims

1. A method for paleo-geomorphological restoration in complex fault-block areas based on tectonic backstripping, characterized in that: The steps are: Data acquisition step: acquiring a structural map of the target layer to be restored, wherein the structural map includes a top surface structural map and a bottom surface structural map; Fault numbering step: identifying the faults in the structural map and sequentially numbering the faults in the set direction to obtain a numbered structural map; Fault throw recovery step: according to the calculated vertical fault throw of each fault in the numbered structural map, the vertical fault throw of each fault is divided into blocks to recover the vertical fault throw of each fault; according to the measured horizontal fault throw of each fault in the numbered structural map, the horizontal fault throw of each fault is divided into blocks to recover the horizontal fault throw of each fault; Paleomorphological restoration steps: set a reference surface, calculate the distance TR from the top surface structural map after fault throw restoration to the reference surface, and the distance BR from the bottom surface structural map after fault throw restoration to the reference surface, and subtract the distance TR from the distance BR to obtain the compacted paleomorphological surface.

2. The method for restoring ancient landforms in complex fault block areas based on tectonic backstripping according to claim 1, characterized in that: The method also includes an abnormal point elimination step: eliminating abnormal points in the compacted paleo-geomorphological surface, wherein the abnormal points are points that obviously do not conform to the trend.

3. The method for paleo-geomorphological restoration of complex fault-block areas based on tectonic backstripping according to claim 1 or 2, characterized in that: The method also includes a compaction correction step: calculating the compression coefficient of the target layer according to the porosity of the stratum during deposition and the porosity of the target layer, and multiplying the calculated compression coefficient by the paleo-geomorphological surface to obtain the paleo-geomorphology after compaction correction.

4. The method for restoring ancient landforms in complex fault-block areas based on tectonic backstripping according to claim 1, characterized in that: In the fault numbering step, the method for identifying faults in the structural map is: Graphics construction steps: construct a fault polygon plane graphic, and construct a top polygon layer and a bottom polygon layer in the plane graphic; Copying steps: copy the fault polygons in the top surface structure map to the top surface polygon layer, and copy the polygons in the bottom surface structure map to the bottom surface polygon layer; Identification steps: Among the top fault polygons and bottom fault polygons, fault polygons with similar lengths and positions are regarded as the same fault.

5. The method for restoring ancient landforms in complex fault block areas based on tectonic backstripping according to claim 4, characterized in that: In the fault numbering step, the method for sequentially numbering the faults according to the set direction to obtain the numbered structural map is as follows: Layer construction steps: construct a fault number layer in the plane graphic; Numbering step: Sequentially number the identified faults according to the set direction and place them in the fault number layer; Copying step: copy the fault number layer after placing the number to the top surface structure map and the bottom surface structure map to obtain the coded structure map.

6. The method for restoring ancient landforms in complex fault-block areas based on tectonic backstripping according to claim 1, characterized in that: The fault recovery step comprises: Vertical fault throw recovery steps: Calculate the vertical fault throw of each fault in the structural map, divide the fault blocks according to the vertical distance calculated for each fault, and recover the vertical fault throw of each fault; Horizontal fault throw recovery steps: measure the horizontal fault throw of a certain fault in the structural map, and recover the horizontal fault throw of each fault according to the measured horizontal fault throw segment blocks.

7. The method for restoring ancient landforms in complex fault block areas based on tectonic backstripping according to claim 6, characterized in that: In the vertical throw recovery step, the method for calculating the vertical throw of the fault is as follows: for the i-th fault, take the values of the corresponding points on the hanging wall and footwall on both sides of the i-th fault, and subtract the corresponding point value of the hanging wall from the corresponding point value of the footwall to obtain the vertical throw of the i-th fault; The method for recovering the vertical fault distance of the fault by dividing the fault blocks according to the vertical distance calculated by the fault is as follows: for the i-th fault, fix the extreme edges of the two adjacent set directions, and move all the fault blocks of the i-th fault in the direction opposite to the set direction upward in the vertical direction to recover the vertical fault distance of the i-th fault by the calculated vertical fault distance.

8. The method for restoring ancient landforms in complex fault-block areas based on tectonic backstripping according to claim 6, characterized in that: In the horizontal fault throw recovery step, the method for measuring the horizontal fault throw of the fault in the structural map is as follows: for the i-th fault, the horizontal fault throw of the i-th fault is directly measured on the top surface structural map; The method for restoring the horizontal fault throw of the fault according to the measured horizontal fault throw segment blocks is as follows: for the i-th fault, fix the two adjacent edges of the set direction, and move all the fault blocks of the i-th fault in the opposite direction to the set direction in the direction perpendicular to the i-th fault to measure the horizontal fault throw distance of the i-th fault.

9. A paleo-geomorphological restoration system for complex fault-block areas based on tectonic backstripping, used to implement the paleo-geomorphological restoration method for complex fault-block areas based on tectonic backstripping as claimed in any one of claims 1 to 8, characterized in that: include: A data acquisition module, which acquires a structural diagram of the target layer to be restored; The fault numbering module identifies the faults in the structural map and sequentially numbers the faults in the set direction to obtain a numbered structural map; The fault distance recovery module calculates the vertical fault distance and horizontal fault distance of each fault in the numbered structural diagram, divides the fault blocks according to the vertical distance of each fault to restore the vertical fault distance of each fault, and divides the fault blocks according to the horizontal fault distance of each fault to restore the horizontal fault distance of each fault; The paleo-geomorphology restoration module sets a reference surface and calculates the distance TR from the top surface structural map after fault throw restoration to the reference surface and the distance BR from the bottom surface structural map after fault throw restoration to the reference surface. The compacted paleo-geomorphology surface is obtained by subtracting the distance TR from the distance BR.

10. The complex fault block area paleo-geomorphology restoration system based on tectonic backstripping according to claim 9, characterized in that: It also includes an abnormal point removal module and a compaction correction module. The abnormal point removal module is used to remove abnormal points in the compacted paleo-geomorphological surface; the compaction correction module is used to calculate the compression coefficient of the target layer based on the porosity of the stratum during deposition and the porosity of the target layer, and multiply the calculated compression coefficient by the paleo-geomorphological surface to obtain the paleo-geomorphology after compaction correction.

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