A method, device, equipment and medium for evaluating hydrocarbon source rock hydrocarbon generation potential

Abstract

The present application belongs to the technical field of seismic data comprehensive interpretation, and specifically discloses a method for evaluating hydrocarbon source rock hydrocarbon generation potential, comprising the following steps: S1, establishing a stratigraphic framework; S2, selecting a corresponding method according to the denudation relationship to restore the denudation thickness, adding the present residual stratigraphic structure to obtain the paleogeomorphology after the denudation thickness is restored; S3, obtaining the relationship between the depth and the porosity by statistical fitting, performing compaction recovery, and then superimposing the stratigraphic structure during the sedimentary period to obtain the paleogeomorphology of the hydrocarbon source rock in the study area during the sedimentary period; and S4, obtaining the depth at which the target type hydrocarbon source rock starts to generate hydrocarbon, and the range greater than the depth at which the target type hydrocarbon source rock starts to generate hydrocarbon in the paleogeomorphology of the hydrocarbon source rock in the study area during the sedimentary period obtained in step S3 is the hydrocarbon generation kitchen of the target type hydrocarbon source rock, which is a region with greater hydrocarbon generation potential of the target type hydrocarbon source rock. The present application improves the recovery accuracy of the paleogeomorphology and guarantees the accuracy of the oil and gas reservoir exploration resource information. The present application is suitable for oil and gas reservoir exploration and development.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of comprehensive interpretation of seismic data, and particularly relates to a method, device, equipment and medium for evaluating hydrocarbon source rock hydrocarbon generation potential. BACKGROUND

[0002] In the process of oil and gas exploration, the evaluation of the exploration potential of a target area is a prerequisite for whether there is a hydrocarbon source rock capable of generating oil and gas near the target area. The organic matter in the hydrocarbon source rock gradually matures with the increase of temperature and pressure during the burial process. Due to the increase of burial depth, the formation temperature gradually increases. When the temperature reaches a certain value, the kerogen begins to generate a large amount of hydrocarbon, that is, only when the burial depth of the hydrocarbon source rock in the target area reaches or has reached a certain depth, the target area can generate oil and gas. Because of multiple geological movements, the topography when the hydrocarbon source rock is generated is often quite different from the present structure. For example, the original deep hydrocarbon source rock deposition center often becomes a tectonic high point after tectonic inversion movement. Therefore, the present structure obtained from the interpretation of seismic data often cannot reflect the original topography when the oil is generated.

[0003] The previous paleogeomorphology restoration method and the hydrocarbon generation potential evaluation method based thereon often only involve the restoration of denudation amount and ignore the influence of compaction effect on the paleogeomorphology. The calculated hydrocarbon generation amount is inaccurate and cannot provide accurate resource information for the exploration of such oil and gas reservoirs. SUMMARY

[0004] The purpose of the present application is to provide a method, device, equipment and medium for evaluating the hydrocarbon generation potential of a hydrocarbon source rock, so as to improve the accuracy of resource information for the exploration of oil and gas reservoirs.

[0005] In order to achieve the above purpose, the technical method adopted by the present application is as follows:

[0006] A method for evaluating the hydrocarbon generation potential of a hydrocarbon source rock, comprising the following steps performed in sequence:

[0007] S1, preparing the basic data of the study area, importing the basic data into geophysical prospecting software, and establishing a stratigraphic framework; the basic data includes seismic data, seismic interpretation results and logging data;

[0008] S2, identifying the denudation relationship of the study area, selecting a corresponding method for denudation thickness restoration according to the identification result, adding the obtained denudation thickness to the present residual stratum topography structure to obtain the paleogeomorphology after the denudation thickness restoration of the study area;

[0009] S3. Based on the logging data, select logging sample points, statistically analyze the depth and porosity of the logging sample points, and fit the fitting formula of the relationship between depth and porosity in the study area. According to the fitting formula of the relationship between depth and porosity in the study area, substitute the relevant depth to calculate the porosity. Use the thickness-burial depth-porosity recovery method with porosity and depth as parameters to obtain the original stratum thickness after compaction recovery. Then superimpose the topographic structure of the study area during the deposition period to obtain the paleogeography of the hydrocarbon source rocks in the study area during the deposition period.

[0010] S4. Collect hydrocarbon generation data at different depths from each well logging, and statistically determine the starting depth of hydrocarbon generation in the target type source rock. The range in the paleogeography of the source rock in the study area during the sedimentary period obtained in step S3 that is greater than the starting depth of hydrocarbon generation in the target type source rock is the hydrocarbon generation foci of the target type source rock, which is an area with greater hydrocarbon generation potential of the target type source rock.

[0011] As a limitation: the seismic data in step S1 is imported into the geophysical software in the form of SGY files; the seismic interpretation results include stratigraphic interpretation data, fault interpretation data, and fault channel interpretation data; the well logging data includes well location, well inclination, stratigraphy, porosity, density, and acoustic data.

[0012] As a limitation, the erosion thickness recovery in step S2 specifically involves: selecting representative skeleton profiles, constructing a profile network that can control the basin, analyzing the erosion relationship of each survey line, selecting appropriate methods to recover the erosion thickness, using vertical connecting lines to close the erosion amount after the erosion thickness recovery of each survey line, analyzing the variation law of the erosion amount on the connecting lines, further modifying the main survey line until a reasonable erosion amount is obtained, using the velocity of the existing residual strata to perform time-depth conversion to obtain the stratigraphic erosion thickness of the study area, and adding the erosion thickness to the existing residual strata topographic structure to obtain the paleogeography after the erosion thickness recovery.

[0013] As a further clarification: the method for restoring the erosion thickness in step S2 is specifically as follows:

[0014] When the erosion relationship is a stable stratum parallel unconformity, the lateral changes of the strata are stable, the erosion surface is parallel to the stratum surface, and the strata before erosion are obtained by overall compensation based on the regional stratum thickness.

[0015] When the erosion relationship is a stable angular unconformity, the original strata are parallel, the erosion surface is not parallel to the strata, and the top and bottom surfaces of the strata extend into the eroded area according to the extension trend, thus obtaining the strata before erosion.

[0016] When the erosion relationship is a variable stratigraphic angle unconformity, the original stratigraphic inner layer develops in a wedge shape, the erosion surface is not parallel to the stratigraphic plane, and the top and bottom surfaces of the stratigraphy extend into the eroded area according to the extension trend. When the top and bottom surfaces intersect, the extension stops, and the stratigraphic position before erosion is obtained.

[0017] As another limitation: In step S3, based on the fitting formula for the relationship between depth and porosity in the study area, the depths of the top and bottom boundaries of the compacted strata, the top and bottom boundaries of the original strata thickness are substituted to calculate the porosity of the top and bottom boundaries of the compacted strata, the porosity of the top and bottom boundaries of the original strata thickness; the original thickness of the compacted strata is then obtained using the thickness-depth-porosity recovery method with porosity and depth as parameters. Specifically:

[0018] Based on the principle that the thickness of the stratigraphic framework remains constant, the formula for calculating the original thickness of the strata in the study area is as follows:

[0019]

[0020] Where h1 is the buried depth of the top boundary of the compacted stratum, h2 is the buried depth of the bottom boundary of the compacted stratum, P1 is the porosity of the top boundary of the compacted stratum, P2 is the porosity of the bottom boundary of the compacted stratum, Pt is the porosity of the top boundary of the original thickness of the stratum, and Po is the porosity of the bottom boundary of the original thickness of the stratum.

[0021] By combining the paleogeography restored from the erosion thickness obtained in step S2, the burial depth h1 of the top boundary of the compacted strata and the burial depth h2 of the bottom boundary of the compacted strata are obtained, and then the original thickness of the strata after the compaction thickness restoration in the study area is obtained.

[0022] As a further limitation: the hydrocarbon generation data in step S4 includes the conversion rate of chloroform bitumen “A”, the total hydrocarbon conversion rate, and the hydrocarbon generation potential conversion rate.

[0023] This invention also discloses a device for evaluating the hydrocarbon generation potential of source rocks, comprising:

[0024] The basic data preparation module is used to prepare basic data for the study area, import the basic data into geophysical software, and establish a stratigraphic framework; the basic data includes seismic data, seismic interpretation results, and well logging data.

[0025] The erosion thickness recovery module is used to identify the erosion relationship in the study area, select the appropriate method to recover the erosion thickness based on the identification results, and add the obtained erosion thickness to the existing residual strata and topography to obtain the paleogeography after the erosion thickness recovery of the study area.

[0026] The compaction thickness and thickness burial depth recovery module selects well logging points based on well logging data, statistically analyzes the depth and porosity of the well logging points, and fits a fitting formula for the relationship between depth and porosity in the study area. Based on the fitting formula for the relationship between depth and porosity in the study area, the porosity is calculated by substituting the relevant depths. The original stratum thickness after compaction recovery is obtained using the thickness-burial depth-porosity recovery method with porosity and depth as parameters. Then, the topographic structure of the study area during the depositional period is superimposed to obtain the paleogeography of the hydrocarbon source rocks in the study area during the depositional period.

[0027] The hydrocarbon generation potential evaluation module is used to collect hydrocarbon generation data at different depths from various well logs, and statistically determine the starting depth of hydrocarbon generation in the target type source rock. The range in the paleogeography of the source rock in the study area during the sedimentary period that is greater than the starting depth of hydrocarbon generation in the target type source rock is the hydrocarbon generation foci of the target type source rock, which is an area with greater hydrocarbon generation potential of the target type source rock.

[0028] The present invention also discloses an electronic device, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, wherein the processor executes the computer program to implement the above-described method.

[0029] The present invention also discloses a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method.

[0030] The beneficial effects achieved by this invention, due to the adoption of the above-described solution, compared with the prior art, are as follows:

[0031] (1) The present invention provides a method for evaluating the hydrocarbon generation potential of source rocks. The method evaluates the hydrocarbon generation potential of the study area by restoring the paleomorphology obtained by restoring the erosion thickness and the compaction thickness. This improves the accuracy of the paleomorphology restoration and ensures the accuracy of oil and gas reservoir exploration resource information. It simplifies the types of erosion relationships and the erosion thickness restoration method, reduces computational resources and computational difficulty, and improves the speed and efficiency of data processing.

[0032] (2) The present invention also provides corresponding implementation devices, electronic devices and readable storage media, which further make the method more practical, and the devices, electronic devices and readable storage media have corresponding advantages.

[0033] This invention is applicable to oil and gas reservoir exploration and development. Attached Figure Description

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0035] Figure 1 This is a flowchart of a method for evaluating the hydrocarbon generation potential of source rocks according to Embodiment 1 of the present invention;

[0036] Figure 2 This is a schematic diagram of formation restoration when the erosion relationship is a stable angular unconformity in Embodiment 1 of the present invention;

[0037] Figure 3 This is a schematic diagram of stratigraphic restoration when the erosion relationship is an unconformity with varying stratigraphic angles, as shown in Embodiment 1 of the present invention.

[0038] Figure 4 (a) is a diagram showing the current thickness of the residual strata in the study area of ​​Example 1 of the present invention;

[0039] Figure 4 (b) is a schematic diagram of the formation thickness after the erosion thickness was restored in the study area of ​​Example 1 of the present invention;

[0040] Figure 5 This is a fitting graph showing the relationship between depth and porosity in the study area of ​​Example 1 of the present invention;

[0041] Figure 6 (a) is a paleoburial depth diagram of the source rocks of the Jurassic system before sedimentation in Example 1 of the present invention;

[0042] Figure 6 (b) is a structural diagram of the base boundary of the hydrocarbon source rock at the end of the Cretaceous period in Example 1 of the present invention;

[0043] Figure 7 This is a graph showing the changes in the conversion rate of chloroform bitumen "A" in the source rock of the study area in Example 1 of this invention, the total hydrocarbon conversion rate, and the hydrocarbon generation potential conversion rate with well depth.

[0044] Figure 8 This is a structural block diagram of the hydrocarbon source rock hydrocarbon generation potential evaluation device of Embodiment 2 of the present invention;

[0045] Figure 9 This is a structural block diagram of an electronic device according to Embodiment 2 of the present invention. Detailed Implementation

[0046] The present invention will be further described below with reference to the embodiments. However, those skilled in the art should understand that the present invention is not limited to the following embodiments. Any improvements and equivalent changes made based on the specific embodiments of the present invention are within the scope of protection of the claims of the present invention.

[0047] Example 1: A method for evaluating the hydrocarbon generation potential of source rocks

[0048] This embodiment evaluates the hydrocarbon generation potential of the Paleozoic Carboniferous coal-bearing source rocks in the Dagang Oilfield. The evaluation method is as follows: Figure 1 As shown, the steps are performed sequentially:

[0049] S1. Prepare basic data for the study area and import the basic data into Geoeast software to establish a stratigraphic framework. The basic data includes seismic data, seismic interpretation results, and well logging data. The seismic data is imported into Geoeast software in the form of SGY files. The seismic interpretation results include stratigraphic interpretation data, fault interpretation data, and fault passage interpretation data. The well logging data includes well location, well inclination, stratigraphy, porosity, density, and acoustic data.

[0050] S2. Select representative skeleton profiles to construct a profile network that can control the basin. Analyze the erosion relationship of each survey line to recover the erosion thickness. The methods for erosion thickness recovery are shown in Table 1.

[0051] When the erosion relationship is a stable stratum parallel unconformity, the lateral changes of the strata are stable, the erosion surface is parallel to the stratum surface, and the strata before erosion are obtained by overall compensation based on the regional stratum thickness.

[0052] When the erosion relationship is a stable angular unconformity, the original strata are parallel, the erosion surface is not parallel to the strata, and the top and bottom surfaces of the strata extend into the eroded area according to the extension trend, thus obtaining the strata before erosion.

[0053] When the erosion relationship is a variable stratigraphic angle unconformity, the original stratigraphic inner layer develops in a wedge shape, the erosion surface is not parallel to the stratigraphic surface, and the top and bottom surfaces of the stratigraphy extend into the eroded area according to the extension trend. The extension stops when the top and bottom surfaces intersect, and the stratigraphic position before erosion is obtained.

[0054] Table 1. Erosion Relationship and Corresponding Erosion Thickness Recovery Methods

[0055]

[0056] The erosion relationships in the study area of ​​this embodiment include stable stratigraphic angle unconformities and variable stratigraphic angle unconformities. The erosion relationship is illustrated in the stratigraphic restoration diagram for stable stratigraphic angle unconformities, as shown in the figure. Figure 2 As shown, the stratigraphic restoration diagram is illustrated when the erosion relationship is an unconformity with varying stratigraphic angles. Figure 3 As shown;

[0057] The erosion thickness of each survey line was recovered using vertical connecting lines. The variation pattern of erosion thickness along the connecting lines was analyzed, and the main survey line was further modified until a reasonable erosion thickness was obtained. An erosion thickness map was drawn based on the recovered erosion thickness of all survey lines. Time-depth conversion was performed using the velocity of the existing residual strata to obtain the stratigraphic erosion thickness map of the study area. The erosion thickness map was then compared with... Figure 4 Adding the remaining stratigraphic thickness maps of the study area shown in (a) together yields... Figure 4 (b) shows the formation thickness map after the erosion thickness has been restored;

[0058] S3. Based on the logging data, select logging sample points, statistically analyze the depth and porosity of the logging sample points, and fit the data to obtain... Figure 5 The fitted graph showing the relationship between depth and porosity, and the fitted formula for the relationship between depth and porosity in the study area are shown below.

[0059] H=5053.82-125.62138×P+580.16 / P

[0060] Where H is the depth of the study area and P is the porosity of the study area;

[0061] Based on the fitting formula for the relationship between depth and porosity in the study area, the depths of the top and bottom boundaries of the compacted strata, the top and bottom boundaries of the original strata thickness are substituted into the formula to calculate the porosity of the top and bottom boundaries of the compacted strata, the porosity of the top and bottom boundaries of the original strata thickness, and the porosity of the original strata thickness. The thickness-depth-porosity reconstruction method, using porosity and depth as parameters, is then used to obtain the paleomorphology after compaction. Specifically:

[0062] According to the principle that the thickness of the stratigraphic framework remains constant:

[0063] K = (h2 - h1) × (1 - (P1 + P2) / 2)

[0064] K = Ho × (1 - (Pt + Po) / 2)

[0065] Therefore, the formula for calculating the original thickness of the strata in the study area is as follows:

[0066]

[0067] Where h1 is the buried depth of the top boundary of the compacted stratum, h2 is the buried depth of the bottom boundary of the compacted stratum, P1 is the porosity of the top boundary of the compacted stratum, P2 is the porosity of the bottom boundary of the compacted stratum, Pt is the porosity of the top boundary of the original thickness of the stratum, and Po is the porosity of the bottom boundary of the original thickness of the stratum.

[0068] By combining the erosion thickness recovery stratigraphic thickness map obtained in step S2, the burial depths of the top and bottom boundaries of the compacted strata can be obtained, thus yielding the original stratigraphic thickness of the study area. This thickness is then superimposed with the topographic structure of the study area during the depositional period to obtain... Figure 6 (a) shows the paleoburial depth map of the pre-Jurassic Carboniferous coal-bearing source rocks and Figure 6 (b) shows the structural diagram of the base of the Late Cretaceous carbonaceous coal-bearing source rocks;

[0069] S4. Collect the chloroform bitumen "A" conversion rate, total hydrocarbon conversion rate, and hydrocarbon generation potential conversion rate at different depths in each well log. The changes in chloroform bitumen "A" conversion rate, total hydrocarbon conversion rate, and hydrocarbon generation potential conversion rate with well depth are as follows: Figure 7 As shown, the depth at which hydrocarbon generation begins in the carbonaceous and coal-bearing source rocks is obtained. The area on the structural map of the base of the carbonaceous and coal-bearing source rocks that exceeds this depth represents the hydrocarbon-generating foci, areas with significant hydrocarbon generation potential. This embodiment is based on the hydrocarbon generation depth within... Figure 6 (b) shows the structural map of the bottom boundary of the Late Cretaceous Carboniferous coal-bearing source rocks, which delineates two hydrocarbon generation sites, WMY and YB. The newly discovered WMY hydrocarbon generation site represents a breakthrough in oil and gas exploration in the study area.

[0070] Example 2: A device, equipment, and medium for evaluating the hydrocarbon generation potential of source rocks.

[0071] A device for evaluating the hydrocarbon generation potential of source rocks, the structural block diagram of which is shown below. Figure 8 As shown, it includes:

[0072] The basic data preparation module is used to prepare basic data for the study area, import the basic data into geophysical software, and establish a stratigraphic framework; the basic data includes seismic data, seismic interpretation results, and well logging data.

[0073] The erosion thickness recovery module is used to identify the erosion relationship in the study area, select the appropriate method to recover the erosion thickness based on the identification results, and add the obtained erosion thickness to the existing residual strata and topography to obtain the paleogeography after the erosion thickness recovery of the study area.

[0074] The compaction thickness and thickness burial depth recovery module selects well logging points based on well logging data, statistically analyzes the depth and porosity of the well logging points, and fits a fitting formula for the relationship between depth and porosity in the study area. Based on the fitting formula for the relationship between depth and porosity in the study area, the porosity is calculated by substituting the relevant depths. The original stratum thickness after compaction recovery is obtained using the thickness-burial depth-porosity recovery method with porosity and depth as parameters. Then, the topographic structure of the study area during the depositional period is superimposed to obtain the paleogeography of the hydrocarbon source rocks in the study area during the depositional period.

[0075] The hydrocarbon generation potential evaluation module is used to collect hydrocarbon generation data at different depths from various well logs, and statistically determine the starting depth of hydrocarbon generation in the target type source rock. The range in the paleogeography of the source rock in the study area during the sedimentary period that is greater than the starting depth of hydrocarbon generation in the target type source rock is the hydrocarbon generation foci of the target type source rock, which is an area with greater hydrocarbon generation potential of the target type source rock.

[0076] This embodiment also provides an electronic device, the structural block diagram of which is shown below. Figure 9 As shown, it includes a memory, a processor, and a computer program stored in the memory and capable of running on the processor. When the processor executes the computer program, it implements the method described in Embodiment 1.

[0077] This embodiment also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the method described in Embodiment 1.

Claims

1. A method for evaluating the hydrocarbon generation potential of source rocks, characterized in that, This includes the following steps performed sequentially: S1. Prepare basic data for the study area, import the basic data into geophysical software, and establish a stratigraphic framework; the basic data includes seismic data, seismic interpretation results, and well logging data. S2. Identify the erosion relationships in the study area, select the appropriate method to restore the erosion thickness based on the identification results, add the obtained erosion thickness to the existing residual strata topography, and obtain the paleomorphology after the erosion thickness restoration in the study area; combine the paleomorphology after the erosion thickness restoration obtained in step S2 to obtain the buried depth h1 of the top boundary of the compacted strata and the buried depth h2 of the bottom boundary of the compacted strata, and then obtain the original thickness of the strata after the compaction thickness restoration in the study area. S3. Based on the logging data, select logging sample points, statistically analyze the depth and porosity of the logging sample points, and fit the fitting formula of the relationship between depth and porosity in the study area. According to the fitting formula of the relationship between depth and porosity in the study area, substitute the relevant depth to calculate the porosity. Use the thickness-burial depth-porosity recovery method with porosity and depth as parameters to obtain the original stratum thickness after compaction recovery. Then superimpose the topographic structure of the study area during the deposition period to obtain the paleogeography of the hydrocarbon source rocks in the study area during the deposition period. In step S3, based on the fitting formula for the relationship between depth and porosity in the study area, the top boundary depth of the compacted stratum, the bottom boundary depth of the compacted stratum, the top boundary depth of the original stratum thickness, and the bottom boundary depth of the original stratum thickness are substituted to calculate the top boundary porosity of the compacted stratum, the bottom boundary porosity of the compacted stratum, the top boundary porosity of the original stratum thickness, and the bottom boundary porosity of the original stratum thickness. S4. Collect hydrocarbon generation data at different depths from each well logging, and statistically determine the starting depth of hydrocarbon generation in the target type source rock. The range in the paleogeography of the source rock in the study area during the sedimentary period obtained in step S3 that is greater than the starting depth of hydrocarbon generation in the target type source rock is the hydrocarbon generation foci of the target type source rock, which is an area with greater hydrocarbon generation potential of the target type source rock.

2. The method for evaluating the hydrocarbon generation potential of source rocks according to claim 1, characterized in that, The seismic data in step S1 is imported into the geophysical software in the form of SGY files; the seismic interpretation results include stratigraphic interpretation data, fault interpretation data, and fault tunnel interpretation data; the well logging data includes well location, well inclination, stratigraphy, porosity, density, and acoustic data.

3. A method for evaluating the hydrocarbon generation potential of source rocks according to claim 1 or 2, characterized in that, The specific steps for restoring erosion thickness in step S2 are as follows: Select representative skeleton profiles, construct a profile network that can control the basin, analyze the erosion relationship of each survey line, select appropriate methods to restore erosion thickness, close the erosion amount after erosion thickness restoration of each survey line with vertical connecting lines, analyze the variation law of erosion amount on the connecting lines, further modify the main survey line until a reasonable restored erosion amount is obtained, perform time-depth conversion using the velocity of the existing residual strata to obtain the stratigraphic erosion thickness of the study area, and add the erosion thickness to the existing residual strata topographic structure to obtain the paleogeography after erosion thickness restoration.

4. The method for evaluating the hydrocarbon generation potential of source rocks according to claim 3, characterized in that, The specific method for restoring the erosion thickness in step S2 is as follows: When the erosion relationship is a stable stratum parallel unconformity, the lateral changes of the strata are stable, the erosion surface is parallel to the stratum surface, and the strata before erosion are obtained by overall compensation based on the regional stratum thickness. When the erosion relationship is a stable angular unconformity, the original strata are parallel, the erosion surface is not parallel to the strata, and the top and bottom surfaces of the strata extend into the eroded area according to the extension trend, thus obtaining the strata before erosion. When the erosion relationship is a variable stratigraphic angle unconformity, the original stratigraphic inner layer develops in a wedge shape, the erosion surface is not parallel to the stratigraphic plane, and the top and bottom surfaces of the stratigraphy extend into the eroded area according to the extension trend. When the top and bottom surfaces intersect, the extension stops, and the stratigraphic position before erosion is obtained.

5. A method for evaluating the hydrocarbon generation potential of source rocks according to claim 1 or 2, characterized in that, The original thickness of the compacted and restored stratum was obtained using the thickness-depth-porosity recovery method, which uses porosity and depth as parameters. Specifically: Based on the principle that the thickness of the stratigraphic framework remains constant, the formula for calculating the original thickness of the strata in the study area is as follows: Where h1 is the buried depth of the top boundary of the compacted stratum, h2 is the buried depth of the bottom boundary of the compacted stratum, P1 is the porosity of the top boundary of the compacted stratum, P2 is the porosity of the bottom boundary of the compacted stratum, Pt is the porosity of the top boundary of the original thickness of the stratum, and Po is the porosity of the bottom boundary of the original thickness of the stratum.

6. A method for evaluating the hydrocarbon generation potential of source rocks according to claim 1 or 2, characterized in that, The hydrocarbon generation data in step S4 includes the conversion rate of chloroform bitumen "A", the total hydrocarbon conversion rate, and the hydrocarbon generation potential conversion rate.

7. A device for evaluating the hydrocarbon generation potential of source rocks, characterized in that, include: The basic data preparation module is used to prepare basic data for the study area, import the basic data into geophysical software, and establish a stratigraphic framework; the basic data includes seismic data, seismic interpretation results, and well logging data. The erosion thickness recovery module is used to identify the erosion relationship in the study area. Based on the identification results, an appropriate method is selected to recover the erosion thickness. The obtained erosion thickness is added to the existing residual strata topography to obtain the paleomorphology after erosion thickness recovery in the study area. Combined with the paleomorphology after erosion thickness recovery obtained in step S2, the burial depth h1 of the top boundary of the compacted strata and the burial depth h2 of the bottom boundary of the compacted strata are obtained, and then the original thickness of the strata after compaction thickness recovery in the study area is obtained. The compaction thickness and thickness burial depth recovery module selects well logging points based on well logging data, statistically analyzes the depth and porosity of these points, and fits a formula for the relationship between depth and porosity in the study area. Based on this formula, porosity is calculated by substituting relevant depths. The original stratum thickness after compaction recovery is obtained using the thickness-burial depth-porosity recovery method with porosity and depth as parameters. This is then superimposed with the topographic structure of the study area during the depositional period to obtain the paleogeography of the source rocks in the study area during the depositional period. Based on the formula for the relationship between depth and porosity in the study area, the top and bottom boundaries of the compacted strata, the top and bottom boundaries of the original stratum thickness are substituted to calculate the porosity at the top and bottom boundaries of the compacted strata, as well as the porosity at the top and bottom boundaries of the original stratum thickness. The hydrocarbon generation potential evaluation module is used to collect hydrocarbon generation data at different depths from various well logs, and statistically determine the starting depth of hydrocarbon generation in the target type source rock. The range in the paleogeography of the source rock in the study area during the sedimentary period that is greater than the starting depth of hydrocarbon generation in the target type source rock is the hydrocarbon generation foci of the target type source rock, which is an area with greater hydrocarbon generation potential of the target type source rock.

8. An electronic device, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and capable of running on the processor, wherein the processor executes the computer program to implement the method of any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the method of any one of claims 1-6.

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