A method, device, equipment and medium for determining the geological age of an unconformity surface

Abstract

The present application discloses a method, device, equipment and medium for determining the geological age of an unconformity surface. The method comprises: setting a constraint frame for a target area where an unconformity surface exists; randomly setting points in the constraint frame, and generating a plurality of thermal history curves based on random search of each point; obtaining simulation results corresponding to each thermal history curve according to a low-temperature chronology method, and screening the thermal history curves through the simulation results to obtain screened thermal history curves; obtaining final thermal history curve simulation results of the target area according to the screened thermal history curves; extracting the time corresponding to the inflection point between cooling and heating according to the final thermal history curve simulation results to obtain the geological age of the unconformity top surface of the target area, horizontally projecting the inflection point to an older thermal history segment, obtaining the time corresponding to the projection point projected on the mean curve, and obtaining the geological age of the unconformity bottom surface of the target area, thereby solving the technical problem that it is difficult to determine the geological age of the unconformity bottom and top surfaces in the prior art.

Description

Technical Field

[0001] The present application relates to the field of geological technology, and in particular to a method, device, equipment and medium for determining the geological age of an unconformity surface. Background Art

[0002] Sedimentary stratigraphic age studies provide basic geological information for basic geological research and mineral exploration and other related research fields. However, obtaining stratigraphic age is not an easy task, especially when some strata lack the characteristic organisms and other factors required for dating, the stratigraphic age is difficult to determine. Unconformity is the boundary between overlying and underlying strata, and its corresponding geological age is even more difficult to determine. Therefore, providing a method for determining the geological age of unconformity is an urgent problem to be solved. Summary of the invention

[0003] The present application provides a method, device, equipment and medium for determining the geological age of an unconformity surface, which is used to solve the technical problem that it is difficult to determine the geological age of the bottom and top surfaces of an unconformity in the prior art.

[0004] In view of this, the first aspect of the present application provides a method for determining the geological age of an unconformity surface, comprising:

[0005] Set a constraint box for the target area where the unconformity exists;

[0006] Randomly set points in the constraint frame, and generate a plurality of thermal history curves based on random search of each point;

[0007] Acquire simulation results corresponding to each of the thermal history curves according to a cryochronology method, and screen the thermal history curves using the simulation results to obtain screened thermal history curves;

[0008] Obtaining a final thermal history curve simulation result of the target area according to the post-screening thermal history curve;

[0009] The time corresponding to the inflection point from cooling to heating is extracted according to the simulation result of the final thermal history curve to obtain the geological age of the unconformity top surface of the target area. The inflection point is horizontally projected to an older thermal history segment to obtain the time corresponding to the projection point projected on the mean curve to obtain the geological age of the unconformity bottom surface of the target area.

[0010] Optionally, the constraint frame includes a constraint frame of the unconformity top surface, a constraint frame of the maximum buried depth point before the unconformity surface is formed, and a constraint frame buried to the maximum depth point after the unconformity surface is formed.

[0011] Optionally, randomly setting points in the constraint frame and generating a plurality of thermal history curves based on random search of each point includes:

[0012] Randomly set points in the constraint frame, randomly insert a number of points between the points while keeping the evolution trend of the thermal history curve unchanged, and connect the points to generate a thermal history curve;

[0013] Repeat the steps of randomly setting points in the constraint frame, randomly inserting a plurality of points between the points while keeping the evolution trend of the thermal history curve unchanged, and connecting the points to generate a thermal history curve, to generate a plurality of thermal history curves.

[0014] Optionally, screening the thermal history curve by using the simulation result to obtain a screened thermal history curve includes:

[0015] Calculating the goodness of fit of each of the thermal history curves through the simulation results;

[0016] The thermal history curve is screened by comparing the goodness of fit with a preset threshold to obtain a screened thermal history curve.

[0017] The second aspect of the present application provides a device for determining the geological age of an unconformity surface, comprising:

[0018] Setting cells for setting a constraint box for the target area where the unconformity exists;

[0019] A random search unit, used for randomly setting points in the constraint frame, and generating a plurality of thermal history curves based on random search of each point;

[0020] A screening unit, used for obtaining simulation results corresponding to each thermal history curve according to a cryochronology method, and screening the thermal history curve according to the simulation results to obtain a screened thermal history curve;

[0021] An acquisition unit, configured to acquire a final thermal history curve simulation result of the target area according to the screened thermal history curve;

[0022] The extraction unit is used to extract the time corresponding to the inflection point from cooling to heating according to the simulation result of the final thermal history curve, obtain the geological age of the unconformity top surface of the target area, horizontally project the inflection point to an older thermal history segment, obtain the time corresponding to the projection point projected on the mean curve, and obtain the geological age of the unconformity bottom surface of the target area.

[0023] Optionally, the constraint frame includes a constraint frame of the unconformity top surface, a constraint frame of the maximum buried depth point before the unconformity surface is formed, and a constraint frame buried to the maximum depth point after the unconformity surface is formed.

[0024] Optionally, the random search unit is specifically used for:

[0025] Randomly set points in the constraint frame, randomly insert a number of points between the points while keeping the evolution trend of the thermal history curve unchanged, and connect the points to generate a thermal history curve;

[0026] Repeat the steps of randomly setting points in the constraint frame, randomly inserting a plurality of points between the points while keeping the evolution trend of the thermal history curve unchanged, and connecting the points to generate a thermal history curve, to generate a plurality of thermal history curves.

[0027] Optionally, the screening unit is specifically used for:

[0028] Obtaining simulation results corresponding to each of the thermal history curves according to a cryochronology method;

[0029] Calculating the goodness of fit of each of the thermal history curves through the simulation results;

[0030] The thermal history curve is screened by comparing the goodness of fit with a preset threshold to obtain a screened thermal history curve.

[0031] A third aspect of the present application provides a device for determining the geological age of an unconformity surface, the device comprising a processor and a memory;

[0032] The memory is used to store program code and transmit the program code to the processor;

[0033] The processor is used to execute any one of the methods for determining the geological age of an unconformity surface described in the first aspect according to the instructions in the program code.

[0034] In a fourth aspect, the present application provides a computer-readable storage medium, which is used to store program codes. When the program codes are executed by a processor, the method for determining the geological age of an unconformity surface described in any one of the first aspects is implemented.

[0035] It can be seen from the above technical solutions that this application has the following advantages:

[0036] The present application provides a method for determining the geological age of an unconformity, including: setting a constraint frame for a target area where an unconformity exists; randomly setting points in the constraint frame, and generating a plurality of thermal history curves based on random searches of the points; obtaining simulation results corresponding to the thermal history curves according to a low-temperature chronology method, and screening the thermal history curves through the simulation results to obtain screened thermal history curves; obtaining final thermal history curve simulation results of the target area according to the screened thermal history curves; extracting the time corresponding to the inflection point from cooling to heating according to the final thermal history curve simulation results to obtain the geological age of the unconformity top surface of the target area, horizontally projecting the inflection point to an older thermal history segment, obtaining the time corresponding to the projection point on the mean curve, and obtaining the geological age of the unconformity bottom surface of the target area.

[0037] In the present application, a constraint frame is set for the target area where an unconformity surface exists to determine the changing trend of the random search thermal history curve, and the precise area of ​​the inflection point between cooling and heating is determined by thermal history simulation within the constraint frame. The dynamic process of the formation of the unconformity surface is restored by the thermal history simulation method, and then the unconformity top surface and the ground geological age of the target area are determined, thereby solving the technical problem that the existing technology is difficult to determine the geological age of the unconformity bottom and top surfaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0039] Figure 1 A schematic flow chart of a method for determining the geological age of an unconformity surface provided in an embodiment of the present application;

[0040] Figure 2 A schematic diagram of the final thermal history curve simulation result of a certain area provided in an embodiment of the present application;

[0041] Figure 3 A bottom column chart of a well in a certain area provided in an embodiment of the present application;

[0042] Figure 4 A schematic diagram of the simulation results of the final thermal history curve of drilling in a certain area provided in an embodiment of the present application;

[0043] Figure 5 A structural schematic diagram of a device for determining the geological age of an unconformity surface provided in an embodiment of the present application. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0045] For easier understanding, see Figure 1 The present application embodiment provides a method for determining the geological age of an unconformity surface, including:

[0046] Step 101: Set a constraint box for a target area where an unconformity surface exists.

[0047] According to the existing stratigraphic age above and below the unconformity surface in the target area, a suitable constraint frame can be set to determine the changing trend of the random search thermal history curve. Setting the constraint frame is one of the key steps. An unconformity surface corresponds to at least three constraint frames, namely the constraint frame of the unconformity top surface, the constraint frame of the maximum burial depth point before the unconformity surface is formed, and the constraint frame of the maximum burial depth point after the unconformity surface is formed. Because the unconformity surface is a stratigraphic discontinuity surface, its existence makes it impossible to form a continuous sedimentary sequence between the overlying strata and the underlying strata. The formation of the unconformity surface is usually caused by the cessation of deposition of the underlying strata, the beginning of erosion (erosion amount ≥ 0), and then the re-deposition, which is formed by such a complete process. Although the unconformity surface is only an interface in the remaining stratigraphic sequence today, the information it contains is a dynamic process. Therefore, the embodiment of the present application uses a thermal history simulation method to restore the dynamic process and finally determine the geological age of the unconformity surface, including the geological age of the unconformity top surface and the geological age of the unconformity bottom surface.

[0048] Step 102: randomly set points in the constraint frame, and generate a number of thermal history curves based on random search of each point.

[0049] After setting the constraint frame, randomly search the thermal history, randomly set points between the start time of the simulation and the current time, and within the constraint frame, and then insert points between the above points, that is, randomly insert a certain number of points under the condition of keeping the evolution trend of the thermal history curve unchanged (the rising or falling trend determined by the two boundary points remains fixed). After inserting the points, the temperature of each point monotonically rises or monotonically decreases. Connect all time-temperature points from the start time-temperature point to the current time-temperature point into a line as the thermal history curve. When randomly setting points within the constraint frame, use the points within the constraint frame as the direction points, insert points, and finally connect the lines as the thermal history curve. Repeat the process of randomly generating thermal history curves, search for a large number of such thermal history curves, preferably covering the entire simulation time-temperature range, to determine that the final thermal history obtained is the global optimal solution.

[0050] Step 103: obtaining simulation results corresponding to each thermal history curve according to the cryochronology method, and screening the thermal history curves through the simulation results to obtain screened thermal history curves.

[0051] According to the cryochronology method, the simulation results corresponding to each thermal history curve are obtained, and then the simulation results are compared with the experimental results, and the screening is performed according to the error threshold, and finally the screened thermal history curve that meets the requirements is obtained. Specifically, the goodness of fit of each thermal history curve can be calculated by the simulation results; the thermal history curve is screened by comparing the goodness of fit with the preset threshold to obtain the screened thermal history curve. The cryochronology method and the calculation process of the goodness of fit belong to the prior art and will not be described in detail here.

[0052] Step 104: Obtain the final thermal history curve simulation result of the target area according to the screened thermal history curve.

[0053] The average value of the thermal history curve after screening at each time point is calculated to finally obtain the mean curve, that is, the final thermal history curve simulation result of the target area.

[0054] Step 105: extract the time corresponding to the inflection point from cooling to heating according to the simulation result of the final thermal history curve, obtain the geological age of the unconformity top surface of the target area, horizontally project the inflection point to the older thermal history segment, obtain the time corresponding to the projection point on the mean curve, and obtain the geological age of the unconformity bottom surface of the target area.

[0055] The inflection point from heating to cooling indicates that the stratum begins to rise, and the inflection point from cooling to heating indicates that the stratum begins to accept sedimentation again and begins to bury the corresponding unconformity top surface. Therefore, based on the simulation results of the final thermal history curve, the time corresponding to the inflection point from cooling to heating is extracted to obtain the geological age of the unconformity top surface of the target area. The inflection point is horizontally projected to the older thermal history segment, and the time corresponding to the projection point on the mean curve is extracted to obtain the geological age of the unconformity bottom surface of the target area. Please refer to Figure 2 is the final mean curve of a certain area. By analyzing the mean curve, it can be seen that the temperature gradually decreases from point A to point B, indicating cooling; the temperature starts to rise after point B, indicating heating, so it can be determined Figure 2 The inflection point between cooling and heating of the mean curve in is point B. Get the time t corresponding to point B 2 , which is the geological age of the top surface of the unconformity; project point B horizontally to the older thermal history section to obtain the projection point C on the mean curve, and obtain the time t corresponding to the projection point C 1 , which is the geological age of the unconformity base.

[0056] In the embodiment of the present application, a constraint frame is set for the target area where the unconformity surface exists to determine the changing trend of the random search thermal history curve, and the precise area of ​​the inflection point between cooling and heating is determined by thermal history simulation within the constraint frame. The dynamic process of the formation of the unconformity surface is restored by the thermal history simulation method, and then the unconformity top surface and the ground geological age of the target area are determined, thereby solving the technical problem that the existing technology is difficult to determine the geological age of the unconformity bottom and top surfaces.

[0057] The above is an embodiment of a method for determining the geological age of an unconformity surface provided by the present application. The following is a specific application example of a method for determining the geological age of an unconformity surface provided by the present application.

[0058] Take the drilling samples in a certain area as an example. Six samples were obtained through drilling and coring. Please refer to Figure 3, the Cenozoic is the Cenozoic strata, the Lower Cretaceous is the Early Cretaceous strata, the top of the Cenozoic is the current surface, there is an unconformity between the Cenozoic and the Lower Cretaceous, this unconformity means that there was a lot of strata in the middle that were eroded, now only this discontinuous interface with the overlying strata is left, the geological time corresponding to the upper and lower boundaries is the problem to be solved, the stars are sampling positions, the samples were collected from very close to the bottom of the unconformity, these samples were collected from the Early Cretaceous strata, overlying the Cenozoic strata, the top of the unconformity was roughly formed in the early Cenozoic, and the geological age of the bottom of the unconformity should be from the Early Cretaceous to the Cenozoic. The 6 samples obtained were tested by low-temperature chronology experiments, including apatite U-Th / He tests for all 6 samples, and U-Th / He ages were obtained; 3 samples were tested by apatite fission track tests, and fission track ages and confined track length distributions were obtained.

[0059] In order to further obtain more accurate geological ages of the top and bottom of the unconformity, the sample can be simulated by joint thermal history of the vertical section. Three constraint frames (excluding the initial deposition and the present time point) are set in the simulation time period to constrain the approximate range of the inflection point. The earliest constraint frame is between 130-56Ma and 30-200℃, which is used to constrain the inflection point range from deposition to uplift; the constraint frame of the middle time is between 60-20Ma and 7-130℃, which constrains the inflection point interval from the exposure surface to the subsidence depth; the latest constraint frame is between 56-0Ma and 30-200℃, which constrains the inflection point time of uplift and exhumation. After setting the constraint frame, the thermal history is randomly searched, including the starting time, the present time point and the random points in the constraint frame, and then a certain number of points are randomly searched between the points under the condition that the evolution trend of the thermal history curve remains unchanged, and the connecting line is used as the thermal history curve. Repeat the random search process, and each sample randomly searches a large number of thermal history curves. According to the low-temperature chronology method, the simulation results (age and length distribution) corresponding to each thermal history curve are obtained, and the error is calculated to determine the acceptable goodness of fit. In the embodiment of the present application, the goodness of fit threshold is 0.01, which means that the error is within the 99% confidence interval. The thermal history curve after screening is obtained by screening with the goodness of fit threshold. By calculating the mean of the thermal history curve after screening corresponding to each sample at each time point, each sample finally obtains a mean thermal history curve. The mean curves of the six samples finally obtained can be referred to Figure 4 , where the black box is the constraint box, the gray area is the acceptable thermal history range (fitting goodness is greater than 0.01), and the curve in the gray area is the average thermal history curve of the six samples, that is, the final thermal history curve simulation result. Figure 4 t in 2 is the geological age of the top of the unconformity, t 1The geological age of the bottom of the unconformity is obtained, and the geological age of the top of the unconformity is about 37 Ma. Projected into the early thermal history, it is close to 130 Ma. This value is acceptable because the samples were collected from a position very close to the bottom of the unconformity.

[0060] Please refer to Figure 5 The present application also provides a device for determining the geological age of an unconformity surface, including:

[0061] Setting cells for setting a constraint box for the target area where the unconformity exists;

[0062] A random search unit, used to randomly set points in the constraint box and generate a number of thermal history curves based on random searches of each point;

[0063] A screening unit is used to obtain simulation results corresponding to each thermal history curve according to the low temperature chronology method, and screen the thermal history curve through the simulation results to obtain a screened thermal history curve;

[0064] An acquisition unit, used for acquiring a final thermal history curve simulation result of a target area according to the thermal history curve after screening;

[0065] The extraction unit is used to extract the time corresponding to the inflection point from cooling to heating according to the final thermal history curve simulation result, obtain the geological age of the unconformity top surface of the target area, horizontally project the inflection point to the older thermal history section, obtain the time corresponding to the projection point on the mean curve, and obtain the geological age of the unconformity bottom surface of the target area.

[0066] As a further improvement, the constraint frame includes the constraint frame of the unconformity top surface, the constraint frame of the maximum buried depth point before the unconformity surface is formed, and the constraint frame of the maximum buried depth point after the unconformity surface is formed.

[0067] As a further improvement, the random search unit is specifically used for:

[0068] Randomly set points in the constraint frame, randomly insert a number of points under the condition that the evolution trend of the thermal history curve remains unchanged between the points, and connect the points to generate a thermal history curve;

[0069] Repeat the steps of randomly setting points in the constraint frame, randomly inserting a plurality of points between the points while keeping the evolution trend of the thermal history curve unchanged, and connecting the points to generate a thermal history curve, to generate a plurality of thermal history curves.

[0070] As a further improvement, the screening unit is specifically used for:

[0071] According to the cryochronology method, the simulation results corresponding to each thermal history curve are obtained;

[0072] The goodness of fit of each thermal history curve is calculated through simulation results;

[0073] The thermal history curve is screened by comparing the goodness of fit with the size of the preset threshold to obtain the screened thermal history curve.

[0074] In the embodiment of the present application, a constraint frame is set for the target area where the unconformity surface exists to determine the changing trend of the random search thermal history curve, and the precise area of ​​the inflection point between cooling and heating is determined by thermal history simulation within the constraint frame. The dynamic process of the formation of the unconformity surface is restored by the thermal history simulation method, and then the unconformity top surface and the ground geological age of the target area are determined, thereby solving the technical problem that the existing technology is difficult to determine the geological age of the unconformity bottom and top surfaces.

[0075] The embodiment of the present application also provides a device for determining the geological age of an unconformity surface, the device comprising a processor and a memory;

[0076] The memory is used to store the program code and transmit the program code to the processor;

[0077] The processor is used to execute the unconformity surface geological age determination method in the aforementioned method embodiment according to the instructions in the program code.

[0078] The embodiment of the present application also provides a computer-readable storage medium, which is used to store program code. When the program code is executed by a processor, the method for determining the geological age of an unconformity surface in the aforementioned method embodiment is implemented.

[0079] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described devices and units can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0080] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0081] It should be understood that in the present application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0082] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0083] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0084] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0085] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for executing all or part of the steps of the method described in each embodiment of the present application through a computer device (which can be a personal computer, a server, or a network device, etc.). The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (full name in English: Read-Only Memory, English abbreviation: ROM), random access memory (full name in English: Random Access Memory, English abbreviation: RAM), disk or optical disk and other media that can store program codes.

[0086] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for determining the geological age of an unconformity surface. It is characterized in that include: Set a constraint box for the target area where the unconformity exists; Randomly set points in the constraint frame, and generate a plurality of thermal history curves based on random search of each point; Acquire simulation results corresponding to each of the thermal history curves according to a cryochronology method, and screen the thermal history curves using the simulation results to obtain screened thermal history curves; Obtaining a final thermal history curve simulation result of the target area according to the post-screening thermal history curve includes: Calculating the average value of the post-screening thermal history curve at each time point to obtain a mean curve, wherein the mean curve is a simulation result of the final thermal history curve of the target area; The time corresponding to the inflection point from cooling to heating is extracted according to the simulation result of the final thermal history curve to obtain the geological age of the unconformity top surface of the target area. The inflection point is horizontally projected to an older thermal history segment to obtain the time corresponding to the projection point projected on the mean curve to obtain the geological age of the unconformity bottom surface of the target area.

2. The method for determining the geological age of an unconformity surface according to claim 1, It is characterized in that The constraint frame includes a constraint frame of the unconformity top surface, a constraint frame of the maximum buried depth point before the unconformity surface is formed, and a constraint frame of the maximum buried depth point after the unconformity surface is formed.

3. The method for determining the geological age of an unconformity surface according to claim 1, It is characterized in that The randomly setting points in the constraint frame and generating a plurality of thermal history curves based on random search of each point include: Randomly set points in the constraint frame, randomly insert a number of points between the points while keeping the evolution trend of the thermal history curve unchanged, and connect the points to generate a thermal history curve; Repeat the steps of randomly setting points in the constraint frame, randomly inserting a plurality of points between the points while keeping the evolution trend of the thermal history curve unchanged, and connecting the points to generate a thermal history curve, to generate a plurality of thermal history curves.

4. The method for determining the geological age of an unconformity surface according to claim 1, It is characterized in that The step of screening the thermal history curve by using the simulation result to obtain a screened thermal history curve includes: Calculating the goodness of fit of each of the thermal history curves through the simulation results; The thermal history curve is screened by comparing the goodness of fit with a preset threshold to obtain a screened thermal history curve.

5. A device for determining the geological age of an unconformity surface, It is characterized in that include: Setting cells for setting a constraint box for the target area where the unconformity exists; A random search unit, used for randomly setting points in the constraint frame, and generating a plurality of thermal history curves based on random search of each point; A screening unit, used for obtaining simulation results corresponding to each of the thermal history curves according to a cryochronology method, and screening the thermal history curves according to the simulation results to obtain screened thermal history curves; An acquisition unit, used for acquiring a final thermal history curve simulation result of the target area according to the screened thermal history curve, comprising: Calculating the average value of the post-screening thermal history curve at each time point to obtain a mean curve, wherein the mean curve is a simulation result of the final thermal history curve of the target area; The extraction unit is used to extract the time corresponding to the inflection point from cooling to heating according to the simulation result of the final thermal history curve, obtain the geological age of the unconformity top surface of the target area, horizontally project the inflection point to an older thermal history segment, obtain the time corresponding to the projection point projected on the mean curve, and obtain the geological age of the unconformity bottom surface of the target area.

6. The device for determining the geological age of an unconformity surface according to claim 5, It is characterized in that The constraint frame includes a constraint frame of the unconformity top surface, a constraint frame of the maximum buried depth point before the unconformity surface is formed, and a constraint frame of the maximum buried depth point after the unconformity surface is formed.

7. The device for determining the geological age of an unconformity surface according to claim 5, It is characterized in that The random search unit is specifically used for: Randomly set points in the constraint frame, randomly insert a number of points between the points while keeping the evolution trend of the thermal history curve unchanged, and connect the points to generate a thermal history curve; Repeat the steps of randomly setting points in the constraint frame, randomly inserting a plurality of points between the points while keeping the evolution trend of the thermal history curve unchanged, and connecting the points to generate a thermal history curve, to generate a plurality of thermal history curves.

8. The device for determining the geological age of an unconformity surface according to claim 5, It is characterized in that The screening unit is specifically used for: Obtaining simulation results corresponding to each of the thermal history curves according to a cryochronology method; Calculating the goodness of fit of each of the thermal history curves through the simulation results; The thermal history curve is screened by comparing the goodness of fit with a preset threshold to obtain a screened thermal history curve.

9. A device for determining the geological age of unconformity surfaces. It is characterized in that The device comprises a processor and a memory; The memory is used to store program codes and transmit the program codes to the processor; The processor is used to execute the method for determining the geological age of an unconformity surface according to any one of claims 1 to 4 according to the instructions in the program code.

10. A computer-readable storage medium, It is characterized in that The computer-readable storage medium is used to store program codes, and when the program codes are executed by a processor, the method for determining the geological age of an unconformity surface according to any one of claims 1 to 4 is implemented.

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