Stratum equal-thickness map manufacturing method and device and readable storage medium

Abstract

The invention relates to a formation equal-thickness map making method and device and a readable storage medium. The formation equal-thickness map making method comprises the steps that firstly, an underground target section is determined, measuring points are obtained based on the target section, and the formation thickness value of the underground target section is obtained. Then, according to seismic data of the measurement points, obtaining a seismic travel time difference value of the underground target section, and then based on the stratum thickness value and the seismic travel time difference value, obtaining a preliminary stratum equal-thickness map, and correcting the preliminary stratum equal-thickness map based on standard point information to obtain a corrected stratum equal-thickness map; by setting the standard point information to correct the preliminary stratum equal-thickness map, the influence of the numerical value of the fault area on the stratum equal-thickness map is marked and screened out, the accuracy of the stratum equal-thickness map is improved, and the accuracy of predicting the surrounding stratum distribution based on the stratum equal-thickness map can also be improved.

Description

Technical Field

[0001] The present invention relates to the related field of making formation isopach maps, and relates to a method for making a formation isopach map, an apparatus for making a formation isopach map, and a readable storage medium. Background Art

[0002] Currently, in the related art, when making a formation isopach map, the formation thickness value of the underground measurement section corresponding to the measurement point should be obtained, and then the formation isopach map is obtained through the formation thickness value. However, since there are fracture regions in the formation, the thickness values of the fracture regions will affect the measured formation isopach map, reducing the accuracy of the formation isopach map. Summary of the Invention

[0003] In view of this, the present invention provides a method for making a formation isopach map, an apparatus for making the same, and a readable storage medium.

[0004] Specifically, the present invention is implemented through the following technical solutions:

[0005] According to a first aspect of the present invention, a method for making a formation isopach map is provided.

[0006] A second aspect of the present invention proposes an apparatus for making a formation isopach map.

[0007] A third aspect of the present invention proposes a readable storage medium.

[0008] In some embodiments, a first aspect of the present invention provides a method for making a formation isopach map. The method for forming a formation isopach map includes determining an underground target section, obtaining measurement points based on the target section, obtaining the formation thickness value of the underground target section, obtaining the seismic travel time difference value of the underground target section according to the seismic data of the measurement points, obtaining a preliminary formation isopach map based on the formation thickness value and the seismic travel time difference value, and correcting the preliminary formation isopach map based on the standard point information to obtain a corrected formation isopach map.

[0009] The present application provides a method for making a formation isopach map. The method for forming a formation isopach map includes first determining an underground target section, obtaining measurement points based on the target section, and obtaining the formation thickness value of the underground target section. Then, obtaining the seismic travel time difference value of the underground target section according to the seismic data of the measurement points. Secondly, obtaining a preliminary formation isopach map based on the formation thickness value and the seismic travel time difference value. Then, correcting the preliminary formation isopach map based on the standard point information to obtain a corrected formation isopach map. By setting the standard point information to correct the preliminary formation isopach map, marking and screening out the influence of the fault region values on the formation isopach map, the accuracy of the formation isopach map can be improved, and the accuracy of predicting the surrounding formation distribution based on the formation isopach map can also be enhanced.

[0010] Specifically, select the underground target section to be measured according to the geographical information of the actual measurement area. Then, select the measurement points according to the geomorphic conditions, and at the same time obtain the longitude and latitude information of the measurement points, which is convenient for retrieving the seismic data of the measurement points and improving the exploration efficiency.

[0011] Specifically, the abnormal points on the initial formation isopach map can be compared according to the standard point information, and then the abnormal value sections can be screened out. The screened formation isopach map can improve the prediction accuracy of the thickness value of the surrounding environment in the underground target section.

[0012] Specifically, the standard point information can be obtained by exploration in the standard area according to the longitude and latitude information of the measurement area. At the same time, the standard area is not affected by faults, and the longitude and latitude information of the standard area can be directly collected. Optionally, through on-site survey and file retrieval, etc. The longitude and latitude information of the standard area can also be indirectly collected. Optionally, through satellites, drones, etc.

[0013] Specifically, the seismic data of the large range of the actual measurement area can be integrated with the seismic data of the small range of the actual exploration of the measurement points, which can improve the accuracy of obtaining the seismic travel time difference, reduce the steps of obtaining the seismic travel time difference, and improve the efficiency of making the formation isopach map.

[0014] Furthermore, the number of measurement points can be selected according to the actual range size of the measurement area. Multiple measurement points can be used to obtain multiple preliminary formation isopach maps, and then the multiple preliminary formation isopach maps can be corrected according to the standard point information, and the formation isopach map of the actual measurement area can be integrated according to the corrected results.

[0015] In addition, the method for making the formation isopach map in the above technical solution provided by the present invention may also have the following additional technical features:

[0016] In some technical solutions of the present invention, optionally, obtaining the formation thickness value of the underground target section includes controlling the detection device to detect the underground target section to obtain the rock data of the underground target section; according to the rock data, obtaining the top depth and bottom depth of the underground target section, and based on the top depth and bottom depth of the underground target section, obtaining the formation thickness value.

[0017] In this technical solution, obtaining the formation thickness value of the underground target section includes controlling the detection device to detect the underground target section to obtain the geological rock data of the underground target section; based on the geological rock data, obtaining the top depth and bottom depth of the underground target section, and based on the top depth and bottom depth of the underground target section, obtaining the formation thickness value. By controlling the detection device to detect the underground target section and obtaining the geological rock data, the integrity of the geological rock data can be improved. At the same time, by obtaining the top depth and bottom depth of the underground target section from the geological rock data, targeted data collection of the measurement points can be achieved, improving the accuracy of the data. Based on the top depth and bottom depth of the underground target section obtained by the detection, the accuracy of the measurement result of the formation thickness value can be improved.

[0018] In some technical solutions of the present invention, optionally, the seismic data includes source information, and obtaining the seismic travel time difference value includes determining the seismic time and seismic depth of the underground target section based on the source information; obtaining the time-depth relationship of the seismic time and seismic depth; and obtaining the seismic travel time difference value based on the time-depth relationship and the geological rock data.

[0019] In this technical solution, the seismic data includes source information, and obtaining the seismic travel time difference value includes determining the seismic time and seismic depth of the underground target section based on the source information; obtaining the time-depth relationship of the seismic time and seismic depth; and obtaining the seismic travel time difference value based on the time-depth relationship and the geological rock data, which can improve the accuracy of the seismic travel time difference value.

[0020] Specifically, the source information can be collected through on-site survey, or can be collected from a database through longitude and latitude information.

[0021] In some technical solutions of the present invention, optionally, the method for making the isopach map of the formation further includes obtaining a seismic travel time difference grid based on the seismic travel time difference value.

[0022] In this technical solution, the method for making the isopach map of the formation further includes obtaining a seismic travel time difference grid based on the seismic travel time difference value, which can improve the accuracy of the seismic travel time difference value and enhance the accuracy of the terrain prediction of the area within the seismic travel time difference grid.

[0023] Specifically, the obtained seismic travel time difference grid can facilitate obtaining the propagation situation of seismic waves at different depths and different positions on the underground target section.

[0024] Specifically, first, the time-depth relationship and the geological rock data of the collected underground target section are synthesized into a seismic travel time difference value, and then a grid is created, and the calculated seismic travel time difference value is distributed on the grid, and a seismic travel time difference grid is generated in combination with the longitude and latitude information of the measurement points.

[0025] Specifically, a geographic information system tool can be used to generate the seismic travel time difference grid.

[0026] In some technical solutions of the present invention, optionally, obtaining the preliminary formation isopach map includes obtaining the preliminary formation isopach map based on the formation thickness value and the seismic travel time difference grid; or obtaining the preliminary formation isopach map based on the formation thickness value, the seismic travel time difference value, and the seismic travel time difference grid.

[0027] In this technical solution, obtaining the preliminary formation isopach map includes obtaining the preliminary formation isopach map based on the formation thickness value and the seismic travel time difference grid; or obtaining the preliminary formation isopach map based on the formation thickness value, the seismic travel time difference value, and the seismic travel time difference grid, which can improve the mapping efficiency of the preliminary formation isopach map. At the same time, the use of the seismic travel time difference grid can improve the accuracy of the preliminary formation isopach map.

[0028] In some technical solutions of the present invention, optionally, the standard point information further includes obtaining the thickness value unaffected by faults based on the rock formation data; obtaining the interpretation grid unaffected by faults based on the thickness value unaffected by faults.

[0029] In this technical solution, the standard point information further includes obtaining the thickness value unaffected by faults based on the rock formation data; obtaining the interpretation grid unaffected by faults based on the thickness value unaffected by faults, which can collect the thickness value unaffected by faults in the standard zone, and then create an interpretation grid. Distributing the thickness value unaffected by faults on the interpretation grid, the obtained interpretation grid unaffected by faults can improve the comprehensiveness of data acquisition in the standard zone.

[0030] In some technical solutions of the present invention, optionally, obtaining the formation isopach map includes correcting the preliminary formation isopach map based on the interpretation grid unaffected by faults to obtain the formation isopach map.

[0031] In this technical solution, obtaining the formation isopach map includes correcting the preliminary formation isopach map based on the interpretation grid unaffected by faults to obtain the formation isopach map, improving the accuracy of the formation isopach map, avoiding the interference of abnormal values in the fracture area on the formation isopach map, and at the same time improving the accuracy of the formation isopach map for estimating the formation thickness value in the area within the range.

[0032] Specifically, multiple groups of interpretation grids unaffected by faults can be generated, and the preliminary formation isopach map can be corrected multiple times through the grids to improve the accuracy of the formation isopach map in a complex environment.

[0033] According to a second aspect of the present invention, there is provided an apparatus for making an isopach map of a formation. The apparatus includes a module for executing the method for making an isopach map of a formation in the first aspect or any possible implementation manner of the first aspect. It includes a control unit, a processing unit, a correction unit, and an image synthesis unit. The control unit is configured to control a detection device to detect the underground target section; the processing unit includes a first operation unit, a second operation unit, and a third operation unit; the first operation unit is configured to process the time-depth relationship and rock formation data to obtain a seismic travel time difference; the second operation unit is configured to obtain a seismic travel time difference grid based on the seismic travel time difference; the third operation unit is configured to obtain an unfaulted interpretation grid based on the unfaulted thickness value. The correction unit is configured to correct the preliminary isopach map based on the unfaulted interpretation grid, and the image synthesis unit is used to obtain the isopach map.

[0034] In this technical solution, the apparatus for making an isopach map of a formation includes a control unit, a processing unit, a correction unit, and an image synthesis unit. The control unit is configured to control a detection device to detect the underground target section; the processing unit includes a first operation unit, a second operation unit, and a third operation unit; the first operation unit is configured to process the time-depth relationship and rock formation data to obtain a seismic travel time difference; the second operation unit is configured to obtain a seismic travel time difference grid based on the seismic travel time difference; the third operation unit is configured to obtain an unfaulted interpretation grid based on the unfaulted thickness value. The correction unit is configured to correct the preliminary isopach map based on the unfaulted interpretation grid, and the image synthesis unit is used to obtain the isopach map. By the cooperation of the control unit, the processing unit, the correction unit, and the image synthesis unit, a preliminary isopach map is synthesized through the formation thickness value and the seismic travel time difference grid, and then the correction unit and the image synthesis unit correct the abnormal values in the fault area of the preliminary isopach map and generate the isopach map, which can improve the accuracy of the isopach map, avoid the influence of abnormal values in the fault area on the isopach map, and improve the accuracy of predicting the formation thickness of the area within the isopach map.

[0035] In some technical solutions of the present invention, optionally, the processing unit further includes a memory and a processor, where the memory is used to store programs or instructions, and the processor is used to implement the method for making an isopach map of a formation in any one of the above technical solutions when executing the programs or instructions.

[0036] In this technical solution, the processing unit further includes a memory and a processor, where the memory is used to store programs or instructions, and the processor is used to implement the method for making an isopach map of a formation in any one of the above technical solutions when executing the programs or instructions. By storing the programs or instructions in the memory and then executed by the processor to implement the method for making an isopach map, the mapping efficiency is improved. At the same time, using programs or instructions can avoid errors during mapping and improve the accuracy of mapping.

[0037] In a third aspect of the present invention, there is provided a readable storage medium on which a program or instructions are stored, and when the program or instructions are executed by a processor, the steps of the control method of the device for making the formation isopach map of any of the above technical solutions are implemented.

[0038] In this technical solution, a program or instructions are stored on the readable storage medium, and when the program or instructions are executed by a processor, the steps of the control method of the device for making the formation isopach map of any of the above technical solutions are implemented. By setting the program or instructions and storing the program or instructions in the readable storage medium, it is convenient for the processor to execute the preset program or instructions, thereby improving the mapping efficiency of the formation isopach map.

[0039] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present invention and, together with the specification, are used to explain the principles of the present invention.

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0042] Figure 1 is a flowchart of a method for making a formation isopach map according to an embodiment of the present invention;

[0043] Figure 2 is a comparison diagram of formation thickness at acquisition points and measurement points according to an embodiment of the present invention;

[0044] Figure 3 is a calibration diagram of seismic records at measurement points according to an embodiment of the present invention;

[0045] Figure 4 is a schematic diagram of the formation structure in a fault area according to an embodiment of the present invention;

[0046] Figure 5 is a three-dimensional seismic interpretation profile at measurement points according to an embodiment of the present invention;

[0047] Figure 6 is a grid distribution diagram of an underground target section according to an embodiment of the present invention;

[0048] Figure 7Stratigraphic isopach map of an underground target section according to an embodiment of the present invention;

[0049] Figure 8 One of the structural block diagrams of a device for making a stratigraphic isopach map according to an embodiment of the present invention;

[0050] Figure 9 Another structural block diagram of a device for making a stratigraphic isopach map according to an embodiment of the present invention;

[0051] Figure 10 Another structural block diagram of a device for making a stratigraphic isopach map according to an embodiment of the present invention.

[0052] Among them, Figures 1 to 10 The corresponding relationship between the reference numerals and the component names is as follows:

[0053] 201 First acquisition point, 202 and measurement point, 203 Second acquisition point, 204 Third acquisition point, 205 Fourth acquisition point, 300 Device for making a stratigraphic isopach map, 310 Control unit, 320 Processing unit, 322 First operation unit, 324 Second operation unit, 326 Third operation unit, 328 Memory, 329 Processor, 330 Calibration unit, 340 Image synthesis unit. Detailed implementation manners

[0054] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0055] Many specific details are set forth in the following description in order to provide a thorough understanding of the present invention. However, the present invention may be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0056] Next, refer to Figures 1 to 10 Describe a method for making a stratigraphic isopach map, a device for making a stratigraphic isopach map, and a readable storage medium according to some embodiments of the present invention.

[0057] In view of this, the first aspect of the present invention provides a method for making a stratigraphic isopach map. As Figure 1 shown, the method for forming a stratigraphic isopach map includes:

[0058] Step 102, determine an underground target section, and obtain measurement points based on the target section;

[0059] Step 104, obtain the formation thickness value of the underground target section;

[0060] Step 106, obtain the seismic travel time difference value of the underground target section according to the seismic data of the measurement points;

[0061] Step 108, based on the formation thickness value and the seismic travel time difference value, obtain a preliminary formation isopach map;

[0062] Step 110, correct the preliminary formation isopach map based on the standard point information to obtain a corrected formation isopach map.

[0063] This application provides a method for making a formation isopach map. The method for generating a formation isopach map includes first determining an underground target section, obtaining measurement points based on the target section, and obtaining the formation thickness value of the underground target section. Then, obtain the seismic travel time difference value of the underground target section according to the seismic data of the measurement points. Secondly, based on the formation thickness value and the seismic travel time difference value, obtain a preliminary formation isopach map. Then, correct the preliminary formation isopach map based on the standard point information to obtain a corrected formation isopach map. By setting the standard point information to correct the preliminary formation isopach map, mark and eliminate the influence of the fault area values on the formation isopach map, improve the accuracy of the formation isopach map, and can also improve the accuracy of predicting the surrounding formation distribution based on the formation isopach map.

[0064] Specifically, select the underground target section to be measured according to the geographical information of the actual measurement area. Then, select the measurement points according to the geomorphic conditions, and at the same time obtain the longitude and latitude information of the measurement points to facilitate retrieving the seismic data of the measurement points and improve the exploration efficiency.

[0065] Specifically, the abnormal points on the preliminary formation isopach map can be compared according to the standard point information, and then the abnormal value sections can be eliminated. The screened formation isopach map can improve the prediction accuracy of the thickness value of the surrounding environment in the underground target section.

[0066] Specifically, the standard point information can be obtained through exploration in the standard area according to the longitude and latitude information of the measurement area. At the same time, the standard area is not affected by faults, and the longitude and latitude information of the standard area can be directly collected. Optionally, through on-site surveys and file retrievals, etc. The longitude and latitude information of the standard area can also be indirectly collected. Optionally, through satellites, drones, etc.

[0067] Specifically, the seismic data of the large range of the actual measurement area can be integrated with the seismic data of the small range of the actual exploration of the measurement points to improve the accuracy of obtaining the seismic travel time difference value, reduce the steps of obtaining the seismic travel time difference value, and improve the efficiency of making the formation isopach map.

[0068] Furthermore, the number of measurement points can be selected according to the actual size of the measurement area. Multiple measurement points can be used to obtain multiple preliminary formation isopach maps, and then the multiple preliminary formation isopach maps can be corrected based on the standard point information, and finally integrated into the formation isopach map of the actual measurement area according to the corrected results.

[0069] Specifically, multiple acquisition points can be established, and the formation thickness of each formation can be acquired through the acquisition points.

[0070] Specifically, as Figure 2 shown, by acquiring the first acquisition point 201, the second acquisition point 203, the third acquisition point 204, the fourth acquisition point 205 and the measurement point 202, a formation thickness comparison map is drawn according to the actual acquisition situation of each acquisition point, and the formations selected are the top depth T1 and the bottom depth T2 of the first target layer.

[0071] Specifically, the top depth of the second target layer is T3 and the bottom depth is T4.

[0072] This embodiment provides a method for making a formation isopach map. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0073] Obtaining the formation thickness value of the underground target section includes controlling the detection device to detect the underground target section to obtain the ground-rock data of the underground target section; based on the ground-rock data, obtaining the top depth and the bottom depth of the underground target section, and based on the top depth and the bottom depth of the underground target section, obtaining the formation thickness value.

[0074] In this embodiment, obtaining the formation thickness value of the underground target section includes controlling the detection device to detect the underground target section to obtain the ground-rock data of the underground target section; based on the ground-rock data, obtaining the top depth and the bottom depth of the underground target section, and based on the top depth and the bottom depth of the underground target section, obtaining the formation thickness value. By controlling the detection device to detect the underground target section and obtaining the ground-rock data, the integrity of the ground-rock data can be improved. At the same time, by obtaining the top depth and the bottom depth of the underground target section from the ground-rock data, targeted data acquisition for the measurement points can be realized, improving the accuracy of the data. Based on the top depth and the bottom depth of the underground target section obtained by the detection, the accuracy of the measurement result of the formation thickness value can be improved.

[0075] Specifically, as Figure 4 and Figure 5 shown, the top depth and the bottom depth of the underground target section at the measurement point 202 are the top depth T1 and the bottom depth T2 of the first target layer.

[0076] This embodiment provides a method for making a formation isopach map. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0077] The seismic data includes source information. Obtaining the seismic travel time difference includes determining the affected time and affected depth of the underground target section based on the source information; obtaining the time-depth relationship of the affected time and affected depth; and obtaining the seismic travel time difference based on the time-depth relationship and the earth-rock data.

[0078] In this embodiment, the seismic data includes source information. Obtaining the seismic travel time difference includes determining the affected time and affected depth of the underground target section based on the source information; obtaining the time-depth relationship of the affected time and affected depth; and obtaining the seismic travel time difference based on the time-depth relationship and the earth-rock data, which can improve the accuracy of the seismic travel time difference.

[0079] Specifically, the source information can be collected through on-site surveys or through database collection using longitude and latitude information.

[0080] Specifically, as Figure 3 shown, it is the calibration of the seismic record at measurement point 202.

[0081] This embodiment provides a method for making a formation isopach map. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0082] The method for making a formation isopach map further includes obtaining a seismic travel time difference grid based on the seismic travel time difference.

[0083] In this embodiment, the method for making a formation isopach map further includes obtaining a seismic travel time difference grid based on the seismic travel time difference, which can improve the accuracy of the seismic travel time difference and enhance the accuracy of the seismic travel time difference grid in predicting the terrain of the area within the range.

[0084] Specifically, the obtained seismic travel time difference grid can facilitate obtaining the propagation situation of seismic waves at different depths and different positions on the underground target section.

[0085] Specifically, first, the time-depth relationship of the collected underground target section and the earth-rock data are synthesized into a seismic travel time difference, and then a grid is created, and the calculated seismic travel time difference is distributed on the grid, and a seismic travel time difference grid is generated in combination with the longitude and latitude information of the measurement points.

[0086] Specifically, a geographic information system tool can be used to generate the seismic travel time difference grid.

[0087] This embodiment provides a method for making a formation isopach map. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0088] Obtaining a preliminary formation isopach map includes obtaining a preliminary formation isopach map based on formation thickness values and seismic travel time difference grids; or obtaining a preliminary formation isopach map based on formation thickness values, seismic travel time difference values, and seismic travel time difference grids.

[0089] In this embodiment, obtaining a preliminary formation isopach map includes obtaining a preliminary formation isopach map based on formation thickness values and seismic travel time difference grids; or obtaining a preliminary formation isopach map based on formation thickness values, seismic travel time difference values, and seismic travel time difference grids, which can improve the mapping efficiency of the preliminary formation isopach map. At the same time, the use of the seismic travel time difference grid can improve the accuracy of the preliminary formation isopach map.

[0090] This embodiment provides a method for making a formation isopach map. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0091] The standard point information further includes obtaining a fault-unaffected thickness value based on geological rock data; obtaining a fault-unaffected interpretation grid based on the fault-unaffected thickness value.

[0092] In this embodiment, the standard point information further includes obtaining a fault-unaffected thickness value based on geological rock data; obtaining a fault-unaffected interpretation grid based on the fault-unaffected thickness value, which can collect the fault-unaffected thickness values of the standard area, then create an interpretation grid, distribute the fault-unaffected thickness values on the interpretation grid, and the obtained fault-unaffected interpretation grid can improve the comprehensiveness of data acquisition in the standard area.

[0093] This embodiment provides a method for making a formation isopach map. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0094] Obtaining a formation isopach map includes correcting the preliminary formation isopach map based on the fault-unaffected interpretation grid to obtain a formation isopach map.

[0095] In this embodiment, obtaining a formation isopach map includes correcting the preliminary formation isopach map based on the fault-unaffected interpretation grid to obtain a formation isopach map, improving the accuracy of the formation isopach map, avoiding the interference of abnormal values in the fracture area on the formation isopach map, and at the same time improving the accuracy of the formation isopach map for estimating the formation thickness values in the area.

[0096] Specifically, as Figure 4 and Figure 5 shown, the fault area P can be screened and corrected according to the fault-unaffected interpretation grid.

[0097] Specifically, multiple groups of fault-unaffected interpretation grids can be generated, and the preliminary formation isopach map can be corrected multiple times through the grids to improve the accuracy of the formation isopach map in complex environments.

[0098] Specifically, as Figure 6 shown, the first acquisition point 201, the second acquisition point 203, the third acquisition point 204, the fourth acquisition point 205, and the measurement point 202 are evenly distributed, and the number and distribution pattern of the acquisition points and the measurement point can be controlled according to the size of the actual measurement area.

[0099] Specifically, as Figure 7 shown, the formation thickness of the surrounding environment can be predicted based on the corrected formation isopach map.

[0100] The second aspect of the present invention provides a device 300 for making a formation isopach map, as Figure 8 , Figure 9 and Figure 10 shown, including a control unit 310, a processing unit 320, a correction unit 330, and an image synthesis unit 340. The control unit 310 is used to control the detection device to detect the underground target section; the processing unit 320 includes a first operation unit 322, a second operation unit 324, and a third operation unit 326; the first operation unit 322 is used to process the time-depth relationship and the formation-rock data to obtain the seismic travel time difference; the second operation unit 324 is used to obtain the seismic travel time difference grid based on the seismic travel time difference; the third operation unit 326 is used to obtain the non-fault-affected interpretation grid based on the non-fault-affected thickness value. The correction unit 330 is used to correct the preliminary formation isopach map based on the non-fault-affected interpretation grid, and the image synthesis unit 340 is used to obtain the formation isopach map.

[0101] In this embodiment, the device 300 for making an isopach map of a formation includes a control unit 310, a processing unit 320, a correction unit 330, and an image synthesis unit 340. The control unit 310 is used to control a detection device to detect the underground target section; the processing unit 320 includes a first operation unit 322, a second operation unit 324, and a third operation unit 326; the first operation unit 322 is used to process the time-depth relationship and formation-rock data to obtain the seismic travel time difference; the second operation unit 324 is used to obtain the seismic travel time difference grid based on the seismic travel time difference; the third operation unit 326 is used to obtain an unaffected-by-fault interpretation grid based on the thickness value unaffected by faults. The correction unit 330 is used to correct the preliminary isopach map of the formation based on the unaffected-by-fault interpretation grid, and the image synthesis unit 340 is used to obtain the isopach map of the formation. Through the cooperation of the control unit 310, the processing unit 320, the correction unit 330, and the image synthesis unit 340, a preliminary isopach map of the formation is synthesized through the formation thickness value and the seismic travel time difference grid, and then the correction unit 330 and the image synthesis unit 340 correct the abnormal values in the fault area of the preliminary isopach map and generate the isopach map of the formation, which can improve the accuracy of the isopach map of the formation, avoid the influence of the abnormal values in the fault area on the isopach map of the formation, and improve the accuracy of the estimation of the formation thickness in the area within the range of the isopach map of the formation.

[0102] This embodiment provides a device 300 for making an isopach map of a formation. In addition to the technical features of the above embodiment, this embodiment further includes the following technical features.

[0103] As Figure 10 shown, the processing unit 320 further includes a memory 328 and a processor 329, where the memory 328 is used to store programs or instructions, and the processor 329 is used to implement the method for making an isopach map of a formation according to any one of the above embodiments when executing the programs or instructions.

[0104] In this embodiment, the processing unit 320 further includes a memory 328 and a processor 329, where the memory 328 is used to store programs or instructions, and the processor 329 is used to implement the method for making an isopach map of a formation according to any one of the above embodiments when executing the programs or instructions. By storing the programs or instructions in the memory 328 and then executed by the processor 329 to implement the method for making an isopach map of the formation, the mapping efficiency is improved. At the same time, using programs or instructions can avoid errors during mapping and improve the accuracy of mapping.

[0105] The third aspect of the present invention provides a readable storage medium, on which programs or instructions are stored, and when the programs or instructions are executed by a processor, the steps of the control method of the device for making an isopach map of a formation according to any one of the above embodiments are implemented.

[0106] In this embodiment, a program or instructions are stored on a readable storage medium. When the program or instructions are executed by a processor, the steps of the control method of the device for making the formation isopach map in any of the above embodiments are implemented. By setting the program or instructions and storing them in the readable storage medium, it is convenient for the processor to execute the preset program or instructions, thereby improving the mapping efficiency of the formation isopach map.

[0107] It should be noted that in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0108] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for making a formation isopach map, characterized in that, the method includes: Determine the underground target section and obtain measurement points based on the underground target section; Obtain the formation thickness values of the underground target section; Obtain the seismic travel time difference values of the underground target section according to the seismic data of the measurement points; Based on the formation thickness values and the seismic travel time difference values, obtain a preliminary formation isopach map; Based on the standard point information, correct the preliminary formation isopach map to obtain a corrected formation isopach map.

2. The method according to claim 1, characterized in that, obtaining the formation thickness values of the underground target section includes: Controlling a detection device to detect the underground target section to obtain the geological rock data of the underground target section; According to the geological rock data, obtain the top depth and bottom depth of the underground target section; Based on the top depth and the bottom depth of the underground target section, obtain the formation thickness values.

3. The method according to claim 2, characterized in that, the seismic data includes seismic source information, and obtaining the seismic travel time difference values includes: Based on the seismic source information, determine the seismic time and seismic depth of the underground target section; Obtain the time-depth relationship of the seismic time and seismic depth; Based on the time-depth relationship and the geological rock data, obtain the seismic travel time difference values.

4. The method according to claim 3, characterized in that, it further includes: Based on the seismic travel time difference values, obtain a seismic travel time difference grid.

5. The method according to claim 4, characterized in that, obtaining the preliminary formation isopach map includes: Based on the formation thickness values and the seismic travel time difference grid, obtain the preliminary formation isopach map; or Based on the formation thickness values, the seismic travel time difference values and the seismic travel time difference grid, obtain the preliminary formation isopach map.

6. The method according to claim 5, characterized in that, the standard point information further includes: Based on the geological rock data, obtain the thickness value not affected by faults; Based on the thickness value not affected by faults, obtain an interpretation grid not affected by faults.

7. The method according to claim 6, characterized in that, obtaining the formation isopach map includes: Based on the interpretation grid not affected by faults, correct the preliminary formation isopach map to obtain the formation isopach map.

8. A device for making a formation isopach map, characterized in that, the device includes: A control unit for controlling a detection device to detect the underground target section; A processing unit including a first operation unit, a second operation unit and a third operation unit; The first operation unit is used for processing the time-depth relationship and the geological rock data to obtain the seismic travel time difference values; The second operation unit is used for obtaining the seismic travel time difference grid based on the seismic travel time difference values; The third operation unit is used for obtaining an interpretation grid not affected by faults based on the thickness value not affected by faults; A correction unit for correcting the preliminary formation isopach map based on the interpretation grid not affected by faults; An image synthesis unit for obtaining a formation isopach map.

9. The device according to claim 8, It is characterized in that the processing unit further includes: a memory for storing programs or instructions; a processor for implementing the method for making an isopach map of a formation according to any one of claims 1 to 7 when executing the programs or instructions.

10. A readable storage medium having a computer program stored thereon, It is characterized in that the steps of the method according to any one of claims 1 to 7 are implemented when the program is executed by a processor.

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