Prediction method and system for extrusion background broken slope fan body and electronic equipment

Abstract

The invention discloses a prediction method and system for an extrusion background broken slope fan body and electronic equipment, and belongs to the technical field of oil-gas exploration evaluation.The prediction method for the extrusion background broken slope fan body comprises the steps that the stratigraphic position and fault data of a target area are determined, and an ancient landform plane graph and an ancient landform dip angle map are correspondingly drawn; and the prediction of the broken slope fan body is realized. Through comprehensive analysis of ancient landform features, fracture evolution periods, stratigraphic slices and seismic attributes, the prediction precision of the broken slope sector is improved.

Description

Technical Field

[0001] This invention belongs to the field of oil and gas exploration and evaluation technology, specifically relating to a method, system and electronic equipment for predicting fault-slope fans in a compressional background. Background Technology

[0002] Fault-slope fan deltaic sand bodies developed in steep slope zones of continental basins play an important role in oil and gas exploration. With the increase in global energy demand, the exploration and development of oil and gas resources are becoming more in-depth and complex. Due to their unique geological characteristics and reservoir formation conditions, fault-slope fan deltaic sand bodies have become one of the important areas for oil and gas exploration, reserve increase and large-scale reserve discovery.

[0003] Currently, there is relatively more research on alluvial fans in rift zones under compressional conditions. The main research methods combine comprehensive analysis of seismic, drilling, lithological, and physical property data. For example, seismic profile response characteristic analysis is conducted, combining seismic, drilling, and well logging data to analyze the reflection characteristics of seismic profiles and infer sedimentary facies zones. Alternatively, the distribution of sedimentary facies zones is further clarified by comparing well-connected profile maps and plan views. While existing methods can identify and predict the distribution of alluvial fans to some extent, they still have limitations in identifying fault-slope fans under compressional conditions with low well control. This is mainly because the geological conditions under compressional conditions are more complex, making it difficult for traditional methods to accurately identify and predict the sedimentary facies zones of fault-slope fans. Summary of the Invention

[0004] The purpose of this invention is to provide a method for predicting the fractured slope fan structure in the background of extrusion, so as to solve the problems encountered in the identification of fractured slope fans mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a method for predicting extruded background fault slope fans, comprising:

[0006] Determine the stratigraphic position and fault data of the target area;

[0007] Based on stratigraphic and fault data, a cross-sectional map of the tectonic evolution characteristics of the target area during different geological periods was drawn.

[0008] Based on the tectonic evolution profile, the strata of the geological history of the development of the interrupted slope fan in the target area were determined;

[0009] The true thickness of strata during the geological history of the development of the fault slope fan was determined, and a paleogeographic plan was drawn based on the true thickness data of strata during the geological history of the development of the fault slope fan. The paleogeographic dip map was also obtained from the paleogeographic plan.

[0010] Based on the paleogeographic plan and paleogeographic dip map, the geological background of the development of the stratigraphic interruption slope fan in the target area was determined;

[0011] Extract stratigraphic slices from the geological background and analyze seismic attribute characteristics to determine the seismic facies of the fault-slope fan.

[0012] By combining paleogeographic plan maps, paleogeographic dip maps, and seismic facies, the planar distribution area of ​​fault-slope fans was determined, and a sedimentary facies distribution map was compiled.

[0013] Furthermore, based on stratigraphic and fault data, cross-sectional maps depicting the tectonic evolution characteristics of the target area during different geological periods are drawn, including:

[0014] Stratigraphic leveling technology is used to level the stratigraphic levels of different geological periods, obtain stratigraphic profiles of the lower part of the leveled stratigraphic levels of different geological periods, and draw tectonic evolution profiles based on the stratigraphic profiles.

[0015] Furthermore, determining the true thickness of strata during the geological history of the fault-slope fan's development includes:

[0016] The apparent thickness of the strata during the geological history of the development of the fault slope fan is calculated based on the stratigraphic data of the target area, and the apparent thickness is corrected for dip angle to obtain the true thickness of the strata during the geological history of the development of the fault slope fan.

[0017] Furthermore, drawing paleogeographic plans based on the actual thickness data of strata during the geological history of the development of the fault-slope fan includes: combining the actual thickness of strata during the geological history of the development of the fault-slope fan with fault data to determine the planar location of faults in the paleogeographic plan, and drawing paleogeographic plans with fault curves.

[0018] Furthermore, based on paleogeographic plan and paleogeographic dip maps, the developmental background of the stratigraphic fault slope fan in the target area was determined to include:

[0019] Based on the paleogeographic dip map, the slope transformation zone is determined, and the first sub-development background of the fault slope fan in the target area is determined by the dip angle range of the slope transformation zone.

[0020] The paleofracture growth index was obtained based on the paleogeographic plan, and the second sub-development background of the fault-slope fan in the target area was determined based on the paleofracture growth index.

[0021] The geological background of the development of the fault-slope fan in the target area is determined by combining the first and second sub-development backgrounds.

[0022] Furthermore, the second sub-developmental background is the range in the target region where the ancient fault growth index is greater than 1.

[0023] Furthermore, the developmental geological interval is the intersection of the first sub-developmental interval and the second sub-developmental interval.

[0024] Furthermore, the seismic attribute features include root square amplitude attributes.

[0025] This application also discloses a prediction system for extruded background fault slope fans, including:

[0026] The module is configured to determine the stratigraphic position and fault data of the target area.

[0027] The first drawing module is configured to draw cross-sectional maps of tectonic evolution characteristics in different geological periods based on stratigraphic horizons and fault data.

[0028] The first determination module is configured to determine the strata of the geological history of the development of the interrupted slope fan body in the target area based on the tectonic evolution feature profile map;

[0029] The second drawing module is configured to determine the true thickness of the strata during the geological history of the development of the fault slope fan, draw a paleogeographic plan based on the true thickness data of the strata during the geological history of the development of the fault slope fan, and obtain a paleogeographic dip map from the paleogeographic plan.

[0030] The second determination module is configured to determine the geological background of the development of the stratigraphic interruption slope fan in the target area based on the paleogeographic plan map and paleogeographic dip map.

[0031] The third determination module is configured to extract stratigraphic slices within the geological background and analyze seismic attribute characteristics in order to determine the seismic facies of the fault slope fan.

[0032] The third drawing module is configured to combine paleogeographic plan view, paleogeographic dip view and seismic facies to determine the planar distribution area of ​​fault slope fans and compile sedimentary facies distribution map.

[0033] Furthermore, in the second determination module, the developmental background of the stratigraphic fault slope fan in the target area is determined based on the paleogeographic plan map and paleogeographic dip map, including:

[0034] Based on the paleogeographic dip map, the slope transformation zone is determined, and the first sub-development background of the fault slope fan in the target area is determined by the dip angle range of the slope transformation zone.

[0035] The paleofracture growth index was obtained based on the paleogeographic plan, and the second sub-development background of the fault-slope fan in the target area was determined based on the paleofracture growth index.

[0036] The geological background of the development of the fault-slope fan in the target area is determined by combining the first and second sub-development backgrounds.

[0037] This application also discloses an electronic device, including:

[0038] Processor and memory;

[0039] The processor invokes a computer program stored in the memory to execute the prediction method according to any one of claims 1 to 8.

[0040] Compared with the prior art, the beneficial effects of the present invention are:

[0041] This application, through comprehensive analysis of paleogeomorphological features, fault evolution stages, stratigraphic slices, and seismic attributes, achieves the following: First, it improves identification accuracy. By fusing and analyzing multiple data sources, it enhances the accuracy of fault-slope fan identification, enabling more accurate determination of the development scale, location, and superposition patterns of the fans. Second, it strengthens predictive capabilities. Based on seismic layer flattening technology and seismic attribute analysis, it can effectively predict the development areas and distribution patterns of fault-slope fans, providing a reliable basis for oil and gas reservoir exploration. Third, through systematic analysis of paleogeomorphological and tectonic evolution characteristics, it reveals the development mechanism and evolutionary patterns of fault-slope fans, providing important support for theoretical research in related fields. Attached Figure Description

[0042] Figure 1 The target area is located in the western section of the mountainous region of Basin A.

[0043] Figure 2 For joint well-seismic interpretation of stratigraphic and fault data in the target area;

[0044] Figure 3 Construct an evolution profile for the target region;

[0045] Figure 4 For target area E3 2 Paleogeographical plan from the depositional period;

[0046] Figure 5 For target area E3 2 Plan view of the dip angle of paleogeographic strata during the depositional period;

[0047] Figure 6 For target area E3 2 Fracture growth index 2;

[0048] Figures 7A-7C For E3 2 Seismic facies planar maps of different sedimentary periods;

[0049] Figure 8 This is a plan view of the sedimentary facies in the target area;

[0050] Figure 9 This is a flowchart of the method disclosed herein;

[0051] Figure 10 This is a schematic diagram of the system disclosed herein;

[0052] Figure 11 This is a schematic diagram of the equipment disclosed herein. Detailed Implementation

[0053] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0054] A method for predicting the extrusion background fault slope fan, referring to Figure 9 It includes the following steps:

[0055] S100: Determine the stratigraphic position and fault data of the target area;

[0056] S200: Based on stratigraphic and fault data, draw cross-sectional maps of tectonic evolution characteristics in different geological periods;

[0057] S300: Based on the tectonic evolution profile, determine the strata of the geological history of the development of the interrupted slope fan in the target area;

[0058] S400: Determine the true thickness of strata during the geological history of the development of the fault slope fan, and draw a paleogeographic plan based on the true thickness data of strata during the geological history of the development of the fault slope fan, and obtain a paleogeographic dip map from the paleogeographic plan.

[0059] S500: Based on the paleogeographic plan and paleogeographic dip map, determine the geological background of the development of the stratigraphic interruption slope fan in the target area;

[0060] S600: Extract stratigraphic slices within the geological background and analyze seismic attribute characteristics to determine the seismic facies of the fault-slope fan.

[0061] S700: Combining paleogeographic plan view, paleogeographic dip map and seismic facies, determine the planar distribution area of ​​fault slope fans and compile sedimentary facies distribution map.

[0062] For example, taking the prediction of the western segment of the fault slope fan in the mountainous area of ​​Basin A as an example (see...) Figure 1 The above steps are explained below. The northern part of this area is adjacent to the Altyn Tagh Mountains, and the target area is located in region B.

[0063] First, the stratigraphic and fault data of the target area are determined. Specifically, the stratigraphic and fault data of the target area are determined based on pre-stack depth migration 3D seismic, well logging, and well logging data. After obtaining the pre-stack depth migration 3D seismic interpretation stratigraphic and fault data, as well as well logging and well logging data of the target area, seismic profiles of key wells are extracted based on the 3D seismic data. The well logging and well logging lithological data are projected onto the seismic profiles, and the well logging strata are compared with the seismic marker phase axes to determine the top and bottom seismic phase axis characteristics of the main target strata. Seismic phase axes with similar characteristics are tracked to obtain the seismic interpretation stratigraphic data and fault data of the top and bottom interfaces in 3D space. The consistency between the well logging lithological data and well logging curves in 3D space is repeatedly checked to confirm the final stratigraphic and fault data. For example, Figure 2 The stratigraphic position data was confirmed as N2. 1 Bottom (bottom of Shangyoushashan Formation), N1 bottom (bottom of Shangganchaigou Formation), E3 2 Bottom (bottom of the upper section of Xiaganchaigou Group), E3 1 At the bottom (bottom of the lower section of the Xiaganchaigou Formation), two syn-sedimentary faults (Fault 1 and Fault 2) were identified.

[0064] After obtaining the stratigraphic and fault data of the target area, it is necessary to draw cross-sectional maps of the tectonic evolution characteristics of different geological periods based on the stratigraphic and fault data. The specific steps are as follows:

[0065] Using stratigraphic leveling technology, the top strata of a certain geological period are adjusted to a horizontal state. The depth offset Δd(x) of each stratum is calculated to obtain the latest depth of all bottom strata when the top strata have the same depth value. Stratigraphic profiles of the lower part after leveling are obtained for different geological periods. The development characteristics of faults in this period are interpreted, the fault evolution stages are determined, and tectonic evolution profiles of different geological periods are drawn based on the stratigraphic profiles.

[0066] The stratigraphic flattening technique is expressed as follows: Let x be the location of the stratum, d be the depth (in meters), and D(x) be the depth of the target stratum at x after an earthquake. For stratum x, calculate the depth offset Δd(x) of the target stratum: Δd(x) = D(x) - D0, where D0 is the target time after flattening (usually set to zero, i.e., D0 = 0, which means the depth of the top stratum after flattening is 0). Obtain the latest depth of all bottom seismic strata when the top strata have the same depth value. For the location x of each stratum, adjust the depth d to the flattened depth d′ = d - Δd(x) = dD(x). In this way, all strata at the bottom of the target stratum are adjusted to the same depth D0. Obtain the stratigraphic strata and fault profiles corresponding to the depth D0, and compile a structural evolution characteristic profile map.

[0067] Reference Figure 3To construct an evolutionary feature profile for the target region, the early Lulehe Formation (E) was identified from the tectonic evolutionary feature profile. 1+2 During the depositional period, the sedimentary layers were filled and replenished, and the sedimentary thickness increased towards the foothills, forming the lower section of the Xiaganchaigou Formation (E3). 1 During the period of deposition, the peneplain was relatively stable in terms of lateral variation in sedimentary thickness, until the upper part of the Lower Ganchaigou Formation (E3) 2 During the period of 1000-11000, the Altun Mountains began to rise continuously, and Fault 2 began to develop. The piedmont slope and fault steps formed. Fault 2 had already developed in the Upper Ganchaigou Formation (N1). Fault 2 has been continuously active to the present, which is conducive to the development of fault slope fans. The upper part of the Lower Ganchaigou Formation (E3) in the target area can be read from the tectonic evolution feature map. 2 The period refers to the geological history of the development of the fault-slope fan, that is, the strata that fractured after being flattened are considered the geological history of the development of the fault-slope fan.

[0068] To determine the strata during the geological history of the fault-slope fan development in the target area, it is necessary to determine the true thickness of the strata during that period, and to draw a paleogeomorphic plan based on the true thickness data. Furthermore, a paleogeomorphic dip map should be obtained from the paleogeomorphic plan.

[0069] Among them, determining the true thickness of strata during the geological history of the development of the fault-slope fan includes:

[0070] The apparent thickness of the strata during the geological history of the development of the fault slope fan is calculated based on the stratigraphic data of the target area, and the apparent thickness is corrected for dip angle to obtain the true thickness of the strata during the geological history of the development of the fault slope fan.

[0071] The formula for apparent seismic thickness is: Apparent stratigraphic thickness = bottom stratigraphic boundary - top stratigraphic boundary.

[0072] The formula for calculating the true thickness of a formation is: True thickness of formation = Apparent thickness of formation * cosθ, where θ is the dip angle of the formation;

[0073] The method for calculating the dip angle of a formation includes: a) gridding the stratigraphic data of the top interface to form a grid model containing multiple grid cells; b) extracting the depth data of the top and bottom interfaces within each grid cell, determining the depth difference between the top and bottom interfaces within the grid cell, measuring the horizontal distance between the top and bottom interfaces within the grid cell, and calculating the dip angle of the formation using the following formula:

[0074] θ = arctan(depth difference / horizontal distance), where the depth difference is the depth difference between the top and bottom interfaces, and the horizontal distance is the corresponding horizontal distance.

[0075] Furthermore, after calculating the true thickness of the strata during the geological history of the slope fan's development, the true thickness of the strata during the geological history of the slope fan's development and fault data are combined to determine the planar location of the faults on the paleogeographic plan, and a paleogeographic plan with fault curves is drawn (see...). Figure 4 This involves using curves to represent the intersections of faults and paleogeographic planes, thus creating corresponding paleogeographic plane maps with fault curves (see [link]). Figure 5 ).

[0076] Subsequently, based on the paleogeographic plan and paleogeographic dip map, the developmental background of the stratigraphic fault slope fan in the target area was determined, specifically including:

[0077] Based on the paleogeographic dip map, the slope transformation zone is determined, and the first sub-development background of the fault slope fan in the target area is determined by the dip angle range of the slope transformation zone.

[0078] The paleofracture growth index was obtained based on the paleogeographic plan, and the second sub-development background of the fault-slope fan in the target area was determined based on the paleofracture growth index.

[0079] The geological background of the development of the fault-slope fan in the target area is determined by combining the first and second sub-development backgrounds.

[0080] Specifically, the aforementioned geological background for the development of fault slope fans refers to the regions in the target area where fault slope fans may develop. More specifically, the first sub-developmental background refers to the regions in the target area where the transition slope angle is relatively large (refer to...). Figure 5 The second sub-developmental background refers to the intervals in the target region where the ancient fault growth index is greater than 1 (refer to...). Figure 6 Correspondingly, the aforementioned developmental geological background constitutes the intersection of the first sub-developmental background and the second sub-developmental background. That is, the developmental geological background is the interval in the target region that simultaneously satisfies the dip angle of the large transform slope zone and the paleofault growth index being greater than 1.

[0081] The paleofault growth index assesses the growth of faults throughout geological history by comparing the fault displacement with the total stratigraphic thickness. First, it calculates the stratigraphic thickness at a specific geological period (e.g., E3). 2 The paleofault displacement D was determined, and then the stratigraphic thickness H of the hanging wall and footwall at the corresponding geological periods was analyzed on the paleogeographic plan. total The further formula for calculating the fracture growth index (FGI) is: FGI = D / H total .

[0082] After determining the geological background of the development of fault-slope fans in the target area, seismic attribute characteristics of the corresponding stratigraphic slices within the development background are extracted and analyzed to determine the seismic facies of the fault-slope fans, specifically including:

[0083] Extract stratigraphic slice data of the target strata and analyze seismic attributes (such as root mean square amplitude) to determine the seismic facies of the fault-slope fan. Root mean square amplitude can better reflect subsurface lithological changes. Analyze the seismic attributes and characteristics of the possible development range of the fault-slope fan to determine the boundaries of the seismic facies zones (see [link to seismic analysis]). Figures 7A-7C ).

[0084] The earthquake attributes mentioned are mainly earthquake amplitude data, such as the root mean square amplitude attribute. The root mean square amplitude attribute is the square root of the average of the squares of the earthquake signal amplitude within a depth window. This attribute can better reflect the changes in underground lithology.

[0085] Finally, by combining paleogeographic plan maps, paleogeographic dip maps, and seismic facies, the planar distribution area of ​​fault-slope fans was determined, and a sedimentary facies distribution map was compiled. Figure 8 ).

[0086] This application also discloses a prediction system for extruded background slope fans, referring to... Figure 10 ,include:

[0087] The module is configured to determine the stratigraphic position and fault data of the target area.

[0088] The first drawing module is configured to draw cross-sectional maps of tectonic evolution characteristics in different geological periods based on stratigraphic horizons and fault data.

[0089] The first determination module is configured to determine the strata of the geological history of the development of the interrupted slope fan body in the target area based on the tectonic evolution feature profile map;

[0090] The second drawing module is configured to determine the true thickness of the strata during the geological history of the development of the fault slope fan, draw a paleogeographic plan based on the true thickness data of the strata during the geological history of the development of the fault slope fan, and obtain a paleogeographic dip map from the paleogeographic plan.

[0091] The second determination module is configured to determine the geological background of the development of the stratigraphic interruption slope fan in the target area based on the paleogeographic plan map and paleogeographic dip map.

[0092] The third determination module is configured to extract stratigraphic slices within the geological background and analyze seismic attribute characteristics in order to determine the seismic facies of the fault slope fan.

[0093] The third drawing module is configured to combine paleogeographic plan view, paleogeographic dip view and seismic facies to determine the planar distribution area of ​​fault slope fans and compile sedimentary facies distribution map.

[0094] like Figure 11As shown, corresponding to the prediction method provided above, this disclosure also provides an electronic device. Since the embodiment of this device is similar to the method embodiment described above, the description is relatively simple; relevant details can be found in the description of the method embodiment section above. The device described below is merely illustrative. This device may include: a processor 1, a memory 2, a communication bus (i.e., the aforementioned device bus), and a lookup engine. The processor 1 and memory 2 communicate with each other via the communication bus and communicate with external systems via a communication interface. The processor 1 can invoke logical instructions in the memory 2 to execute the prediction method.

[0095] Furthermore, the logical instructions in the aforementioned memory 2 can be implemented as software functional units and sold or used as independent products, and can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this disclosure, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this disclosure. The aforementioned storage medium includes various media capable of storing program code, such as memory chips, USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method of predicting the extrusion of a background ramped fan, characterized in that, The method comprises the following steps: determining stratum horizon and fault data of a target area; drawing a structural evolution profile of different geological periods of the target area based on the stratum horizon and fault data; determining a stratum of a geological history period in which a slope-fan body develops in the target area based on the structural evolution profile; determining a true thickness of the stratum of the geological history period in which the slope-fan body develops, and drawing a palaeogeomorphology plane map based on the true thickness data of the stratum of the geological history period in which the slope-fan body develops, and obtaining a palaeogeomorphology dip angle map through the palaeogeomorphology plane map; determining a development background of the slope-fan body in the stratum of the target area based on the palaeogeomorphology plane map and the palaeogeomorphology dip angle map; extracting a stratum slice developed in the development background, analyzing seismic attribute characteristics to determine a seismic facies of the slope-fan body; combining the palaeogeomorphology plane map, the palaeogeomorphology dip angle map and the seismic facies to determine a planar distribution area of the slope-fan body, and preparing a sedimentary facies distribution map.

2. The method of claim 1, wherein: Drawing the structural evolution profile of different geological periods of the target area based on the stratum horizon and fault data comprises the following steps: flattening the stratum horizon of different geological periods through stratum flattening technology, obtaining a stratum profile of the lower part after flattening of different geological periods, and drawing the structural evolution profile of different geological periods based on the stratum profile.

3. A method of predicting the extrusion of a background ramp fan according to claim 1 or 2, characterized in that: Determining the true thickness of the stratum of the geological history period in which the slope-fan body develops comprises the following steps: calculating a true thickness of the stratum of the geological history period in which the slope-fan body develops based on the stratum horizon data of the target area, and performing dip angle correction on the true thickness to obtain the true thickness of the stratum of the geological history period in which the slope-fan body develops.

4. The method of claim 1, wherein: Drawing the palaeogeomorphology plane map based on the true thickness data of the stratum of the geological history period in which the slope-fan body develops comprises the following steps: combining the true thickness of the stratum of the geological history period in which the slope-fan body develops and the fault data to determine a planar position of a fault in the palaeogeomorphology plane map, and drawing the palaeogeomorphology plane map with a fault curve.

5. The method of claim 1, wherein: Determining the development background of the slope-fan body in the stratum of the target area based on the palaeogeomorphology plane map and the palaeogeomorphology dip angle map comprises the following steps: determining a slope type conversion zone based on the palaeogeomorphology dip angle map, and determining a first sub-development background of the slope-fan body in the target area through a dip angle range of the slope type conversion zone; obtaining a fault-growth index based on the palaeogeomorphology plane map, and determining a second sub-development background of the slope-fan body in the target area based on the fault-growth index; combining the first sub-development background and the second sub-development background to determine the development geological background of the slope-fan body in the target area.

6. The method of claim 5, wherein: The second sub-development background is an interval in which the fault-growth index of the target area is greater than 1.

7. The method of claim 5, wherein: The development geological interval is an intersection interval of the first sub-development interval and the second sub-development interval.

8. The method of claim 1, wherein: The seismic attribute characteristics include a square root amplitude attribute.

9. A system for predicting the extrusion of a background ramped fan body, characterized by: The method comprises the following steps: an acquisition module configured to determine stratum horizon and fault data of a target area; a first drawing module configured to draw a structural evolution profile of different geological periods based on the stratum horizon and fault data; a first determining module configured to determine a stratum of a geological history period in which a slope-fan body develops in the target area based on the structural evolution profile; a second drawing module configured to determine real thicknesses of strata developed in a geological history period of the faulted slope fan, draw a palaeogeomorphology plan based on the real thicknesses of strata developed in the geological history period of the faulted slope fan, and obtain a palaeogeomorphology dip angle map through the palaeogeomorphology plan; a second determining module configured to determine a development geological background of the faulted slope fan in the developed strata of the target area based on the palaeogeomorphology plan and the palaeogeomorphology dip angle map; a third determining module configured to extract a developed strata slice in the development geological background, analyze seismic attribute characteristics, and determine a seismic facies of the faulted slope fan; a third drawing module configured to determine a planar distribution area of the faulted slope fan in combination with the palaeogeomorphology plan, the palaeogeomorphology dip angle map and the seismic facies, and compile a sedimentary facies distribution map.

10. A prediction system for extruding a background break fan body according to claim 9, characterized in that: In the second determining module, the determination of the development background of the faulted slope fan in the developed strata of the target area based on the palaeogeomorphology plan and the palaeogeomorphology dip angle map comprises: determining a slope type conversion zone based on the palaeogeomorphology dip angle map, and determining a first sub-development background of the faulted slope fan in the target area through an inclination range of the slope type conversion zone; obtaining a faulted fracture growth index based on the palaeogeomorphology plan, and determining a second sub-development background of the faulted slope fan in the target area based on the faulted fracture growth index; determining the development geological background of the faulted slope fan in the target area in combination with the first sub-development background and the second sub-development background.

11. An electronic device, comprising: comprise: a processor and a memory; the processor invokes a computer program stored in the memory to execute the prediction method in any one of claims 1 to 8.

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