Method, device, equipment and medium for evaluating hydrocarbon generation potential of hydrocarbon source rock

Abstract

The invention belongs to the technical field of seismic data comprehensive interpretation, and particularly discloses a hydrocarbon source rock hydrocarbon generation potential evaluation method which comprises the following steps: S1, establishing a stratigraphic framework; s2, according to the denudation relationship, selecting a corresponding method to recover the denudation thickness, and adding the denudation thickness with the existing residual stratum topographic structure to obtain an ancient landform after denudation thickness recovery; s3, performing statistical fitting to obtain a relationship between depth and porosity, performing compaction recovery, and superimposing the topographic structure in the deposition period to obtain the ancient landform of the hydrocarbon source rock in the research area in the deposition period; s4, the hydrocarbon generation starting depth of the target type hydrocarbon source rock is obtained through statistics, and the range, larger than the hydrocarbon generation starting depth of the target type hydrocarbon source rock, in the ancient landform, obtained in the step S3, of the hydrocarbon source rock in the research area in the deposition period is the hydrocarbon generation stove of the target type hydrocarbon source rock and is the area where the hydrocarbon generation potential of the target type hydrocarbon source rock is large. According to the method, the recovery precision of the ancient landform is improved, and the accuracy of oil and gas reservoir exploration resource information is guaranteed. The method is suitable for oil-gas reservoir exploration and development.

Description

Technical Field

[0001] The present invention belongs to the technical field of comprehensive interpretation of seismic data, and specifically relates to a method, device, equipment and medium for evaluating the hydrocarbon generation potential of source rocks. Background Technique

[0002] During the oil and gas exploration process, the evaluation of the exploration potential of a target area is based on the prerequisite that there are source rocks capable of generating oil and gas near it. The organic matter in the source rock gradually matures with the increase of temperature and pressure during burial. Due to the increase of burial depth, the formation temperature gradually rises. When the temperature reaches a certain value, kerogen begins to generate a large amount of hydrocarbons. That is to say, only when the burial depth of the source rock in the target area reaches or has reached a certain depth, can the target area generate oil and gas. Because of multiple geological movements, the geomorphology at the time of source rock formation often has a large difference from the current structure. For example, the original deep source rock deposition center during sedimentation often becomes the current structural high point after tectonic inversion. Therefore, the current structure obtained from seismic data interpretation often cannot reflect the original geomorphology during oil generation.

[0003] Previous paleogeomorphology restoration methods and hydrocarbon generation potential evaluation methods based on them often only involve the restoration of erosion amount, ignoring the impact of compaction effect on paleogeomorphology. The calculated hydrocarbon generation amount value is inaccurate and cannot provide accurate resource information for the exploration of such oil and gas reservoirs. Summary of the Invention

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

[0005] The technical method adopted by the present invention to achieve the above purpose is as follows:

[0006] A method for evaluating the hydrocarbon generation potential of source rocks includes the following steps carried out in sequence:

[0007] S1. Prepare the basic data of the study area, import the basic data into geophysical exploration software, and establish a stratigraphic framework; the basic data includes seismic data, seismic interpretation results and logging data;

[0008] S2. Identify the erosion relationship in the study area, select the corresponding method for erosion thickness restoration according to the identification result, and add the obtained erosion thickness to the current residual stratum topography and structure to obtain the paleogeomorphology of the study area after erosion thickness restoration;

[0009] S3. According to the logging data, select logging sample points, count the depth and porosity of the logging sample points, fit to obtain the fitting formula for the relationship between depth and porosity in the study area. According to the fitting formula for the relationship between depth and porosity in the study area, substitute the relevant depth to calculate the porosity, and use the thickness-burial depth-porosity restoration method with porosity and depth as parameters to obtain the original formation thickness after compaction restoration. Then, superimpose the topographic structure of the study area during the sedimentary period to obtain the paleogeomorphology of the source rock in the study area during the sedimentary period;

[0010] S4. Collect the hydrocarbon generation data at different depths of each logging, and statistically obtain the starting hydrocarbon generation depth of the target type of source rock. The range in the paleogeomorphology of the source rock in the study area during the sedimentary period obtained in step S3 that is greater than the starting hydrocarbon generation depth of the target type of source rock is the hydrocarbon generation kitchen of the target type of source rock, which is the area with relatively large hydrocarbon generation potential of the target type of source rock.

[0011] As a limitation: The seismic data in step S1 is imported into the geophysical exploration software in the form of SGY files; the seismic interpretation results include horizon interpretation data, fault interpretation data, and fault track interpretation data; the logging data includes well location, well deviation, layer division, porosity, density, and acoustic wave.

[0012] As a limitation: The specific method for restoring the erosion thickness in step S2 is as follows: Select representative skeleton profiles, establish a profile network that can control the basin, analyze the erosion relationship of each survey line, select the corresponding method for restoring the erosion thickness, close the erosion amount after restoring the erosion thickness of each survey line with vertical connecting lines, analyze the variation law of the erosion amount on the connecting lines, and further modify the main survey lines until a reasonable restored erosion amount is obtained. Perform time-depth conversion using the velocity of the existing residual formation to obtain the formation erosion thickness in the study area, and add the erosion thickness to the topographic structure of the existing residual formation to obtain the paleogeomorphology after restoring the erosion thickness.

[0013] As a further limitation: The specific method for restoring the erosion thickness in step S2 is as follows:

[0014] When the erosion relationship is stable stratigraphic parallel unconformity, the lateral variation of the strata is stable, the erosion surface is parallel to the stratigraphic surface, and the horizon before erosion is obtained according to the overall compensation of the regional formation thickness;

[0015] When the erosion relationship is stable stratigraphic angular unconformity, the original strata are parallel, the erosion surface is not parallel to the stratigraphic surface, and the top and bottom of the strata are extended towards the eroded area according to the extension trend to obtain the horizon before erosion;

[0016] When the erosion relationship is variable stratigraphic angular unconformity, the internal structure of the original strata develops in a wedge shape, the erosion surface is not parallel to the stratigraphic surface, and the top and bottom of the strata are extended towards the eroded area according to the extension trend. When the top and bottom intersect, the extension stops to obtain the horizon before erosion.

[0017] As another limitation: In step S3, according to the fitting formula of the relationship between the depth and porosity of the study area, substitute the depth of the top boundary of the compacted formation, the depth of the bottom boundary of the compacted formation, the depth of the top boundary of the original formation thickness, and the depth of the bottom boundary of the original formation thickness to calculate the porosity of the top boundary of the compacted formation, the porosity of the bottom boundary of the compacted formation, the porosity of the top boundary of the original formation thickness, and the porosity of the bottom boundary of the original formation thickness; use the thickness-burial depth-porosity recovery method with porosity and depth as parameters to obtain the original thickness of the formation after compaction recovery, specifically:

[0018] According to the principle of constant formation framework thickness, the calculation formula for the original thickness of the formation in the study area is:

[0019]

[0020] where h1 is the burial depth of the top boundary of the compacted formation, h2 is the burial depth of the bottom boundary of the compacted formation, P1 is the porosity of the top boundary of the compacted formation, P2 is the porosity of the bottom boundary of the compacted formation, Pt is the porosity of the top boundary of the original formation thickness, and Po is the porosity of the bottom boundary of the original formation thickness;

[0021] Combined with the paleogeomorphology after erosion thickness recovery obtained in step S2, obtain the burial depth h1 of the top boundary of the compacted formation and the burial depth h2 of the bottom boundary of the compacted formation, and then obtain the original thickness of the formation after compaction thickness recovery in the study area.

[0022] As yet another limitation: The hydrocarbon generation data in step S4 includes chloroform bitumen "A" conversion rate, total hydrocarbon conversion rate, and hydrocarbon generation potential conversion rate.

[0023] The present invention also discloses a device for evaluating the hydrocarbon generation potential of a hydrocarbon source rock, including:

[0024] A basic data preparation module for preparing the basic data of the study area, importing the basic data into geophysical exploration software, and establishing a formation framework; the basic data includes seismic data, seismic interpretation results, and logging data;

[0025] An erosion thickness recovery module for identifying the erosion relationship in the study area, selecting a corresponding method for erosion thickness recovery according to the identification result, and adding the obtained erosion thickness to the current residual formation topography and structure to obtain the paleogeomorphology of the study area after erosion thickness recovery;

[0026] A compaction thickness and thickness-burial depth recovery module, according to the logging data, select logging sample points, statistically analyze the depth and porosity of the logging sample points, fit to obtain the fitting formula of the relationship between the depth and porosity of the study area, according to the fitting formula of the relationship between the depth and porosity of 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 formation thickness after compaction recovery, and then superimpose the topography and structure of the study area during the sedimentary period to obtain the paleogeomorphology of the hydrocarbon source rock in the study area during the sedimentary period;

[0027] The hydrocarbon generation potential evaluation module is used to collect hydrocarbon generation data at different depths of each well logging, and statistically obtain the starting hydrocarbon generation depth of the target type of source rock. The range in the paleogeomorphology of the source rock in the study area during the sedimentary period that is greater than the starting hydrocarbon generation depth of the target type of source rock is the hydrocarbon kitchen of the target type of source rock, which is the area with relatively large hydrocarbon generation potential of the target type of source rock.

[0028] The present invention also discloses an electronic device, including a memory, a processor, and a computer program stored on the memory and capable of running on the processor. When the processor executes the computer program, the above method is implemented.

[0029] The present invention also discloses a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the above method is implemented.

[0030] Due to the adoption of the above solution, compared with the prior art, the beneficial effects obtained by the present invention are:

[0031] (1) For a method for evaluating the hydrocarbon generation potential of a source rock provided by the present invention, the hydrocarbon generation potential of the study area is evaluated through the paleogeomorphology obtained by erosion thickness restoration and compaction thickness restoration, which improves the restoration accuracy of the paleogeomorphology and ensures the accuracy of oil and gas reservoir exploration resource information; simplifies the types of erosion relationships and the erosion thickness restoration method, reduces computing resources and calculation 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] The present invention is applicable to the exploration and development of oil and gas reservoirs. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0036] Figure 2 It is a schematic diagram of stratigraphic restoration when the erosion relationship is a stable stratigraphic angular unconformity according to Embodiment 1 of the present invention;

[0037] Figure 3 It is a schematic diagram of stratigraphic restoration when the erosion relationship is a variable stratigraphic angular unconformity according to Embodiment 1 of the present invention;

[0038] Figure 4 (a) It is a map of the remaining formation thickness in the study area according to Embodiment 1 of the present invention;

[0039] Figure 4 (b) Schematic diagram of the formation thickness after erosion thickness restoration in the study area of Embodiment 1 of the present invention;

[0040] Figure 5 Fitting graph of the relationship between depth and porosity in the study area of Embodiment 1 of the present invention;

[0041] Figure 6 (a) Paleo-burial depth map of the source rock before Jurassic deposition in Embodiment 1 of the present invention;

[0042] Figure 6 (b) Structural map of the bottom boundary of the source rock at the end of Cretaceous in Embodiment 1 of the present invention;

[0043] Figure 7 Graph showing the variation of chloroform bitumen "A" conversion rate, total hydrocarbon conversion rate and hydrocarbon generation potential conversion rate of the source rock with well depth in the study area of Embodiment 1 of the present invention;

[0044] Figure 8 Structural block diagram of the device for evaluating the hydrocarbon generation potential of the source rock in Embodiment 2 of the present invention;

[0045] Figure 9 Structural block diagram of an electronic device in Embodiment 2 of the present invention. Detailed implementation manners

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

[0047] Embodiment 1 A method for evaluating the hydrocarbon generation potential of a source rock

[0048] In this embodiment, the hydrocarbon generation potential of the Carboniferous coal measure source rock in the Paleozoic of the Dagang Oilfield is evaluated, and the evaluation method is as Figure 1 shown, including the following steps carried out in sequence:

[0049] S1. Prepare the basic data of the study area, import the basic data into the Geoeast software, and establish a stratigraphic framework; the basic data includes seismic data, seismic interpretation results and logging data, and the seismic data is imported into the Geoeast software in the form of SGY files; the seismic interpretation results include horizon interpretation data, fault interpretation data and fault track interpretation data; the logging data includes well location, well deviation, stratification, porosity, density and acoustic wave;

[0050] S2. Select representative skeleton profiles for the base, establish a profile network that can control the basin, analyze the erosion relationships of each survey line for erosion thickness restoration, select corresponding methods for erosion thickness restoration according to the erosion relationships of each survey line. The methods for erosion thickness restoration are shown in Table 1, specifically as follows:

[0051] When the erosion relationship is stable stratigraphic parallel unconformity, the lateral changes of the strata are stable, the erosion surface is parallel to the stratigraphic surface, and the pre-erosion horizons are obtained according to the overall compensation of the regional stratigraphic thickness;

[0052] When the erosion relationship is stable stratigraphic angular unconformity, the original strata are parallel, the erosion surface is not parallel to the stratigraphic surface, and the top and bottom surfaces of the strata are extended towards the eroded area according to the extension trend to obtain the pre-erosion horizons;

[0053] When the erosion relationship is variable stratigraphic angular unconformity, the internal structure of the original strata develops in a wedge shape, the erosion surface is not parallel to the stratigraphic surface, and the top and bottom surfaces of the strata are extended towards the eroded area according to the extension trend and stop extending when the top and bottom surfaces intersect to obtain the pre-erosion horizons;

[0054] Table 1 Erosion relationships and corresponding methods for erosion thickness restoration

[0055]

[0056] The erosion relationships in the study area of this embodiment include stable stratigraphic angular unconformity and variable stratigraphic angular unconformity. The schematic diagram of stratigraphic restoration when the erosion relationship is stable stratigraphic angular unconformity is as shown in Figure 2 shown, and the schematic diagram of stratigraphic restoration when the erosion relationship is variable stratigraphic angular unconformity is as shown in Figure 3 shown;

[0057] Use vertical connecting lines to close the erosion amounts after erosion thickness restoration of each survey line, analyze the variation law of the erosion amounts on the connecting lines, further modify the main survey lines until reasonable restored erosion amounts are obtained, draw an erosion amount map based on the erosion amounts after erosion thickness restoration of all survey lines, perform time-depth conversion using the velocity of the existing residual strata to obtain the stratigraphic erosion thickness map of the study area, and add the erosion thickness map to the Figure 4 (a) shown existing residual stratigraphic thickness map of the study area to obtain the Figure 4 (b) shown stratigraphic thickness map after erosion thickness restoration;

[0058] S3. According to the logging data, select logging sample points, count the depths and porosities of the logging sample points, and fit to obtain the Figure 5 shown fitting diagram of the relationship between depth and porosity. The fitting formula for the relationship between depth and porosity in the study area is:

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

[0060] Among them, H is the depth of the study area, and P is the porosity of the study area;

[0061] According to the fitting formula of the relationship between the depth and porosity of the study area, substitute the top depth of the compacted formation, the bottom depth of the compacted formation, the top depth of the original formation thickness, and the bottom depth of the original formation thickness to calculate the top porosity of the compacted formation, the bottom porosity of the compacted formation, the top porosity of the original formation thickness, and the bottom porosity of the original formation thickness. Use the thickness-burial depth-porosity restoration method with porosity and depth as parameters to obtain the paleogeomorphology after compaction restoration, specifically:

[0062] According to the principle of constant formation framework thickness, it can be known that:

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

[0064] K = Ho × (1 - (Pt + Po) / 2)

[0065] Furthermore, the calculation formula for the original thickness of the formation in the study area is obtained as:

[0066]

[0067] Among them, h1 is the burial depth of the top boundary of the compacted formation, h2 is the burial depth of the bottom boundary of the compacted formation, P1 is the porosity of the top boundary of the compacted formation, P2 is the porosity of the bottom boundary of the compacted formation, Pt is the porosity of the top boundary of the original formation thickness, and Po is the porosity of the bottom boundary of the original formation thickness;

[0068] Combined with the formation thickness map after erosion thickness restoration obtained in step S2, the burial depth of the top boundary of the compacted formation and the burial depth of the bottom boundary of the compacted formation are obtained, and then the original thickness of the formation in the study area is obtained. By superimposing the topography and structure of the study area during the sedimentation period, Figure 6 the paleo-burial depth map of the Carboniferous coal measure hydrocarbon source rock before Jurassic deposition shown in (a) and Figure 6 the bottom boundary structure map of the Carboniferous coal measure hydrocarbon source rock at the end of Cretaceous shown in (b);

[0069] S4. Collect the chloroform bitumen "A" conversion rate, total hydrocarbon conversion rate, and hydrocarbon generation potential conversion rate at different depths of each well logging. The changes of the chloroform bitumen "A" conversion rate, total hydrocarbon conversion rate, and hydrocarbon generation potential conversion rate with well depth are as Figure 7 shown. The hydrocarbon generation starting depth of the Carboniferous coal measure hydrocarbon source rock is obtained. The range in the bottom boundary structure map of the Carboniferous coal measure hydrocarbon source rock that is greater than the hydrocarbon generation starting depth of the Carboniferous coal measure hydrocarbon source rock is the hydrocarbon generation kitchen of the Carboniferous coal measure hydrocarbon source rock, which is the area with relatively large hydrocarbon generation potential of the Carboniferous coal measure hydrocarbon source rock. In this embodiment, according to the hydrocarbon generation depth, Figure 6 two hydrocarbon generation kitchens, WMY and YB, are delineated in the bottom boundary structure map of the Carboniferous coal measure hydrocarbon source rock at the end of Cretaceous shown in (b). The newly discovered WMY hydrocarbon generation kitchen has achieved a breakthrough in the oil and gas exploration of the study area.

[0070] Example 2: An Apparatus, Equipment and Medium for Evaluating the Hydrocarbon Generation Potential of Source Rocks

[0071] An apparatus for evaluating the hydrocarbon generation potential of source rocks, the structural block diagram of which is as Figure 8 shown, includes:

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

[0073] The denudation thickness restoration module is used to identify the denudation relationship in the study area, select the corresponding method for denudation thickness restoration according to the identification result, and add the obtained denudation thickness to the current residual stratum topography and structure to obtain the paleogeomorphology of the study area after denudation thickness restoration;

[0074] The compaction thickness and thickness burial depth restoration module, according to the logging data, selects logging sample points, counts the depth and porosity of the logging sample points, fits to obtain the fitting formula of the depth-porosity relationship in the study area, according to the fitting formula of the depth-porosity relationship in the study area, substitutes the relevant depth to calculate the porosity, and uses the thickness-burial depth-porosity restoration method with porosity and depth as parameters to obtain the original stratum thickness after compaction restoration, and then superimposes the topography and structure of the study area during the sedimentation period to obtain the paleogeomorphology of the source rocks in the study area during the sedimentation period;

[0075] The hydrocarbon generation potential evaluation module is used to collect the hydrocarbon generation data at different depths of each well logging, statistically obtain the starting hydrocarbon generation depth of the target type of source rock, and the range in the paleogeomorphology of the source rocks in the study area during the sedimentation period that is greater than the starting hydrocarbon generation depth of the target type of source rock is the hydrocarbon generation kitchen of the target type of source rock, which is the area with relatively large hydrocarbon generation potential of the target type of source rock.

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

[0077] This embodiment also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the method described in Embodiment 1 is implemented.

Claims

1. A method for evaluating the hydrocarbon generation potential of a hydrocarbon source rock, characterized in that, Including the following steps carried out in sequence: S1. Prepare the basic data of the study area, import the basic data into geophysical exploration software, and establish a stratigraphic framework; the basic data includes seismic data, seismic interpretation results, and logging data; S2. Identify the erosion relationship in the study area, select corresponding methods for erosion thickness restoration according to the identification results, and add the obtained erosion thickness to the current residual stratigraphic topography and structure to obtain the paleogeomorphology after erosion thickness restoration in the study area; S3. According to the logging data, select logging sample points, count the depth and porosity of the logging sample points, fit to obtain the fitting formula for the relationship between depth and porosity in the study area, substitute the relevant depth into the fitting formula for the relationship between depth and porosity in the study area to calculate the porosity, use the thickness-burial depth-porosity restoration method with porosity and depth as parameters to obtain the original stratigraphic thickness after compaction restoration, and then superimpose the topography and structure of the study area during the sedimentary period to obtain the paleogeomorphology of the source rock in the study area during the sedimentary period; S4. Collect the hydrocarbon generation data at different depths of each well log, statistically obtain the starting hydrocarbon generation depth of the target type of source rock, and the range in the paleogeomorphology of the source rock in the study area during the sedimentary period obtained in step S3 that is greater than the starting hydrocarbon generation depth of the target type of source rock is the hydrocarbon generation kitchen of the target type of source rock, which is the area with relatively large hydrocarbon generation potential of the target type of source rock.

2. The hydrocarbon source rock hydrocarbon generation potential evaluation method according to claim 1, wherein, The seismic data in step S1 is imported into the geophysical exploration software in the form of SGY files; the seismic interpretation results include horizon interpretation data, fault interpretation data, and fault track interpretation data; the logging data includes well location, well deviation, stratification, porosity, density, and acoustic wave.

3. A method for evaluating the hydrocarbon generation potential of a source rock according to claim 1 or 2, characterized in that, The specific process of erosion thickness restoration in step S2 is as follows: Select representative skeleton profiles, build a profile network that can control the basin, analyze the erosion relationship of each survey line, select corresponding methods for erosion thickness restoration, close the erosion amount after erosion thickness restoration of each survey line with vertical connecting lines, analyze the variation law of the erosion amount on the connecting lines, and further modify the main survey lines until a reasonable restored erosion amount is obtained. Perform time-depth conversion using the velocity of the current residual strata to obtain the stratum erosion thickness in the study area, and add the erosion thickness to the current residual stratum topography and structure to obtain the paleogeomorphology after erosion thickness restoration.

4. A method for evaluating the hydrocarbon generation potential of a source rock according to claim 3, characterized in that The specific methods for erosion thickness restoration in step S2 are as follows: When the erosion relationship is stable stratigraphic parallel unconformity, the lateral variation of the strata is stable, the erosion surface is parallel to the stratigraphic surface, and the horizon before erosion is obtained according to the overall compensation of the regional stratigraphic thickness; When the erosion relationship is stable stratigraphic angular unconformity, the original strata are parallel, the erosion surface is not parallel to the stratigraphic surface, and the top and bottom surfaces of the strata extend towards the eroded area according to the extension trend to obtain the horizon before erosion; When the erosion relationship is variable stratigraphic angular unconformity, the interior of the original strata develops in a wedge shape, the erosion surface is not parallel to the stratigraphic surface, and the top and bottom surfaces of the strata extend towards the eroded area according to the extension trend and stop extending when the top and bottom surfaces intersect to obtain the horizon before erosion.

5. A method for evaluating the hydrocarbon generation potential of a source rock according to claim 1 or 2, characterized in that, In step S3, according to the fitting formula of the depth-porosity relationship in the study area, substitute the depth of the top boundary of the compacted formation, the depth of the bottom boundary of the compacted formation, the depth of the top boundary of the original formation thickness, and the depth of the bottom boundary of the original formation thickness to calculate the porosity of the top boundary of the compacted formation, the porosity of the bottom boundary of the compacted formation, the porosity of the top boundary of the original formation thickness, and the porosity of the bottom boundary of the original formation thickness; use the thickness-burial depth-porosity recovery method with porosity and depth as parameters to obtain the original thickness of the formation after compaction recovery, specifically: According to the principle of constant formation skeleton thickness, the calculation formula for the original thickness of the formation in the study area is: where h1 is the burial depth of the top boundary of the compacted formation, h2 is the burial depth of the bottom boundary of the compacted formation, P1 is the porosity of the top boundary of the compacted formation, P2 is the porosity of the bottom boundary of the compacted formation, Pt is the porosity of the top boundary of the original formation thickness, and Po is the porosity of the bottom boundary of the original formation thickness; Combine the burial depth h1 of the top boundary of the compacted formation and the burial depth h2 of the bottom boundary of the compacted formation obtained from the paleogeomorphology after erosion thickness recovery in step S2, and then obtain the original thickness of the formation in the study area after compaction thickness recovery.

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

7. An evaluation device for the hydrocarbon generation potential of a source rock, characterized in that, Including: A basic data preparation module for preparing the basic data of the study area, importing the basic data into geophysical exploration software, and establishing a stratigraphic framework; the basic data includes seismic data, seismic interpretation results, and logging data; An erosion thickness recovery module for identifying the erosion relationship in the study area, selecting corresponding methods for erosion thickness recovery according to the identification results, and adding the obtained erosion thickness to the existing residual formation topography and structure to obtain the paleogeomorphology of the study area after erosion thickness recovery; A compaction thickness and thickness-burial depth recovery module, according to the logging data, select logging sample points, count the depth and porosity of the logging sample points, fit the fitting formula of the depth-porosity relationship in the study area, substitute relevant depths according to the fitting formula of the depth-porosity relationship in the study area to calculate porosity, use the thickness-burial depth-porosity recovery method with porosity and depth as parameters to obtain the original thickness of the formation after compaction recovery, and then superimpose the topography and structure of the study area during the sedimentary period to obtain the paleogeomorphology of the source rock in the study area during the sedimentary period; A hydrocarbon generation potential evaluation module for collecting hydrocarbon generation data at different depths of each well log, statistically obtaining the starting hydrocarbon generation depth of the target type of source rock, and the range in the paleogeomorphology of the source rock in the study area during the sedimentary period that is greater than the starting hydrocarbon generation depth of the target type of source rock is the hydrocarbon generation kitchen of the target type of source rock, which is the area with relatively large hydrocarbon generation potential of the target type of source rock.

8. An electronic device, characterized in that, Including a memory, a processor, and a computer program stored on the memory and capable of running on the processor, and when the processor executes the computer program, the method described in any one of claims 1-6 is implemented.

9. A computer-readable storage medium, characterized in that, A computer program is stored on the computer-readable storage medium, and when the computer program is executed by the processor, the method described in any one of claims 1-6 is implemented.

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