Surface structure modeling method and device

Abstract

The present invention provides a surface structure modeling method and device, the method comprising: obtaining elevation data and surface photo data of a target work area; the elevation data and the surface photo data are obtained by aerial survey; determining the position of a geological interface according to the elevation data and the surface photo data; obtaining the position data of a plurality of control points, and the control point combination of each control point; the position data of the control point is determined according to the position of the geological interface; the control point combination includes a plurality of control points, which are used to determine a plane; determining the inclination and dip of the corresponding plane according to the control point combination of each control point; and establishing a surface structure model of the geological interface according to the plurality of groups of inclinations and dips. The modeling efficiency and modeling accuracy of the present invention are greatly improved, and the surface modeling cost is greatly saved.

Description

Technical Field

[0001] The present invention relates to the field of geophysical technology, and in particular to a surface structure modeling method and device. Background Art

[0002] Oil and gas exploration requires the use of known surface structural models to constrain the construction of the three-dimensional spatial form of underground structures. In addition, surface structural models are also needed to support velocity modeling during the digital processing of seismic exploration data. The existing surface structural modeling method requires geologists to measure control points by running geological outcrops. First, since most geological outcrops are in mountainous areas with inconvenient transportation, many locations are difficult or impossible to reach by manpower; secondly, large-scale surface modeling is required in oil and gas exploration, and there are fewer control points obtained by manual measurement; finally, there are subjective factors of geologists. The above three points have a great impact on the accuracy and efficiency of surface structural modeling. Summary of the invention

[0003] The present invention provides a surface structure modeling method and device, which can improve the accuracy and efficiency of surface structure modeling.

[0004] In a first aspect, an embodiment of the present invention provides a surface structure modeling method, the method comprising: obtaining elevation data and surface photo data of a target work area; the elevation data and the surface photo data are obtained by aerial measurement; determining the position of a geological interface based on the elevation data and the surface photo data; obtaining position data of a plurality of control points, and a control point combination of each of the control points; the position data of the control points are determined according to the position of the geological interface; the control point combination comprises a plurality of control points for determining a plane; determining the inclination and dip of the corresponding plane based on the control point combination of each control point; and establishing a surface structure model of the geological interface based on a plurality of sets of the inclinations and the dips.

[0005] In a second aspect, an embodiment of the present invention further provides a surface structure modeling device, which includes: a first acquisition module, used to acquire elevation data and surface photo data of a target work area; the elevation data and the surface photo data are obtained through aerial measurement; a first determination module, used to determine the position of a geological interface based on the elevation data and the surface photo data; a second acquisition module, used to acquire position data of multiple control points, and a control point combination of each control point; the position data of the control point is determined according to the position of the geological interface; the control point combination includes multiple control points, which are used to determine a plane; a second determination module, used to determine the inclination and dip of the corresponding plane based on the control point combination of each control point; and an establishment module, used to establish a surface structure model of the geological interface based on multiple groups of the inclinations and dips.

[0006] In a third aspect, an embodiment of the present invention further provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and the processor implements the above-mentioned surface structure modeling method when executing the computer program.

[0007] In a fourth aspect, an embodiment of the present invention further provides a computer-readable medium having a non-volatile program code executable by a processor, wherein the program code enables the processor to execute the above-mentioned surface structure modeling method.

[0008] The embodiments of the present invention bring the following beneficial effects: the embodiments of the present invention provide a surface structure modeling scheme, which obtains the elevation data and surface photo data of the target work area through aerial survey, determines the position of each geological interface in the target work area according to the elevation data and the surface photo data, obtains the position data of multiple control points in each geological interface, and the control point combination corresponding to each control point, each control point combination includes multiple control points, which are used to determine a plane, and then determines the inclination and dip of the corresponding plane according to the control point combination of each control point, and after obtaining multiple sets of inclinations and dips, establishes the surface structure model of the geological interface. The embodiments of the present invention obtain the morphological information of the geological interface control points, i.e., the inclination and dip, by analyzing the high-precision aerial survey data, and then establishes the surface structure model through the obtained control points, so that the modeling efficiency and modeling accuracy are greatly improved, and the surface modeling cost is greatly saved.

[0009] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0010] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 A flow chart of a surface structure modeling method provided by an embodiment of the present invention;

[0013] Figure 2A schematic diagram of the synthesis result of high-precision surface elevation and high-precision surface image provided by an embodiment of the present invention;

[0014] Figure 3 A schematic diagram of an interface for determining a geological interface and picking control points on remote sensing data provided by an embodiment of the present invention;

[0015] Figure 4 A schematic diagram of a surface structure model of a certain geological interface obtained by calculation according to an embodiment of the present invention;

[0016] Figure 5 A structural block diagram of a surface structure modeling device provided in an embodiment of the present invention;

[0017] Figure 6 A structural block diagram of a computer device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] At present, with the continuous advancement of modern aerial surveying technology, the accuracy is constantly improving, and we are exploring the application of aerial survey data to realize surface structure modeling and provide reliable surface model data for oil and gas exploration.

[0020] Based on this, a surface structure modeling method and device provided in an embodiment of the present invention improves modeling efficiency and reduces modeling costs by combining aerial survey data, making the establishment of a surface structure model more accurate and reasonable.

[0021] To facilitate understanding of this embodiment, a surface structure modeling method disclosed in an embodiment of the present invention is first introduced in detail.

[0022] The present invention provides a surface structure modeling method, see Figure 1 A flow chart of a surface structure modeling method is shown, the method comprising the following steps:

[0023] Step S102, obtaining elevation data and surface photo data of the target work area.

[0024] In the embodiment of the present invention, the target work area can be selected according to actual needs, and the embodiment of the present invention is not specifically limited. The elevation data and the surface photo data are high-precision aerial survey data obtained through aerial survey, wherein the elevation data is used to describe the altitude of each point on the surface, and the surface photo data is used to describe the location of each point on the surface, for example, the geographical location and other information.

[0025] Step S104, determining the position of the geological interface according to the elevation data and the surface photo data.

[0026] In the embodiment of the present invention, the position of the geological interface can be determined based on the elevation data and the surface photo data, and the position of the geological interface can be used to reflect the time when the geological interface was formed. A target work area may include multiple geological interfaces, and different geological interfaces can be distinguished by the position of the geological interface.

[0027] Step S106, obtaining position data of multiple control points and a control point combination of each control point.

[0028] In an embodiment of the present invention, the location data of the control point can be used to describe the geographical location and altitude position of the control point. Since the location of the geological interface can distinguish different geological interfaces, multiple control points can be manually picked on each determined geological interface, and a control point combination can be determined for each control point. The control point combination includes multiple control points and can be used to determine a plane. For example, for a certain geological interface, N control points are manually picked, which are control point 1, control point 2, ..., control point N in sequence. For control point 1, a group of data points on the same geological interface and not on a straight line can be manually picked. For example, the control point combination of control point 1 is determined to be: control point 1, control point 2 and control point 3. Then, according to control point 1, control point 2 and control point 3, a plane corresponding to control point 1 can be determined. Similarly, there is a corresponding control point combination for each control point, and a plane can be determined by each control point combination. Therefore, for a certain geological interface, if N control points are manually picked, N control point combinations also need to be determined, which can be used to determine N planes corresponding to the N control points respectively. Obtain the position data of multiple controls for each geological interface, as well as the control point combination corresponding to each control point.

[0029] It should be noted that the control point combination corresponding to each control point includes the control point itself. For example, the control point combination corresponding to control point N includes at least three control points including control point N. In addition, at least three control points are on the same geological interface and not on the same straight line. Figure 3The schematic diagram of the interface for picking control points for determining the geological interface on remote sensing data is shown, wherein a group of control points P1, P2 and P3 constitute a control point combination, and P1, P2 and P3 can be selected at several inflection points of the geological interface, and the three points are not on the same straight line.

[0030] Step S108, determining the inclination and tilt of the corresponding plane according to the control point combination of each control point.

[0031] In an embodiment of the present invention, after multiple control points and the control point combination corresponding to each control point are determined on a geological interface, the plane corresponding to each control point can be determined. The plane can be expressed by a plane equation, and the inclination and dip of the plane corresponding to the control point can be determined based on the coefficients of the plane equation.

[0032] It should be noted that a set of dip angles and inclinations can be determined for each control point. For example, for a certain geological interface, if it includes N control points, N sets of dip angle and inclination data can be determined.

[0033] Step S110, establishing a surface structural model of the geological interface according to multiple sets of dip angles and inclinations.

[0034] In the embodiment of the present invention, the structural model of the geological interface near the surface is determined by analyzing and calculating the morphological (dip, dip) information of all control points of the same geological interface.

[0035] The embodiment of the present invention provides a surface structure modeling scheme, which obtains the elevation data and surface photo data of the target work area through aerial survey, determines the position of each geological interface in the target work area according to the elevation data and the surface photo data, obtains the position data of multiple control points in each geological interface, and the control point combination corresponding to each control point, each control point combination includes multiple control points, which are used to determine a plane, and then determines the inclination and dip of the corresponding plane according to the control point combination of each control point, and after obtaining multiple sets of inclinations and dips, establishes the surface structure model of the geological interface. The embodiment of the present invention obtains the morphological information of the geological interface control points, i.e., the inclination and dip, by analyzing the high-precision aerial survey data, and then establishes the surface structure model through the obtained control points, so that the modeling efficiency and modeling accuracy are greatly improved, and the surface modeling cost is greatly saved.

[0036] In order to improve the efficiency of determining the location of the geological interface, the location of the geological interface can be determined based on the elevation data and surface photo data. The following steps can be followed:

[0037] The elevation data and the surface photo data are synthesized and processed; the position of the geological interface is determined based on the synthesis result.

[0038] See also Figure 2The schematic diagram of the synthesis results of high-precision surface elevation and high-precision surface image shown in the figure performs high-precision synthesis of high-precision elevation data and high-precision surface photo data, and uses the synthesized result data as the basis for subsequent work to determine the location of geological interfaces, which can improve the efficiency and accuracy of determining the location of geological interfaces.

[0039] Considering that in order to improve the efficiency of determining the inclination and dip, the inclination and dip of the corresponding plane are determined according to the control point combination of each control point, the following steps can be performed:

[0040] Obtain the coordinate value and elevation value of each data point in the control point combination; fit the control points in the control point combination according to the coordinate value and elevation value using a multiple regression algorithm to obtain the plane equation corresponding to each control point; determine the inclination and tilt of the plane corresponding to each control point according to the plane equation.

[0041] In an embodiment of the present invention, each data point in the control point combination is a control point. Therefore, the coordinate value and elevation value of each data point in the data point can be known based on the position data of the control point. For multiple control points in a control point combination, a multivariate regression algorithm is used for fitting to obtain the plane equation of each control point combination, that is, the plane equation corresponding to each control point is obtained, and then the inclination and tilt of the plane corresponding to each control point are determined based on the determined plane equation information.

[0042] For example, for each data point picked up at each control point, the coordinates and elevation values ​​of each point, that is, the three-dimensional coordinates of each data point, are obtained, and then the multivariate regression algorithm is used to fit the plane equation of the geological interface to be determined at the control point, Ax+By+Cz+D=0.

[0043] In order to improve the accuracy of the dip and inclination, the method may further include the following steps:

[0044] The inclination angle is calculated according to the following formula: The tendency is calculated according to the following formula: Among them, θ dip is the inclination angle, θ dipsection is the inclination, A, B and C are the coefficients of the plane equation Ax+By+Cz+D=0 at the control point, x and y are the coordinates of the data point, and z is the elevation value of the data point.

[0045] In the embodiments of the present invention, see Figure 4 The surface structure model diagram of a geological interface calculated as shown in the figure is shown in the figure. Calculate the inclination of the geological interface; use the formula The inclination of the geological interface is calculated. By using the formula to calculate the inclination and inclination, more accurate calculation results can be obtained.

[0046] In order to make full use of high-precision aerial survey data, provide reference for seismic data interpretation, and obtain a more complete surface structural model of the work area, the method may also include the following steps:

[0047] Surface structural models of multiple geological interfaces are established to obtain the surface structural model of the target work area.

[0048] In the embodiment of the present invention, the following steps may be specifically implemented:

[0049] 1) Measure the coordinates and elevation data of at least three points on the same geological interface that are not in a straight line for one control point on the high-precision aerial survey data;

[0050] 2) Obtain the inclination and dip angle of the geological interface at the control point through multi-point fitting;

[0051] 3) By repeating the above two steps, the morphological information of multiple control points of the geological interface is obtained;

[0052] 4) Analyze the morphology of control points of the combined geological interface and construct a surface structural model of the geological interface.

[0053] The embodiment of the present invention provides a surface structure modeling method and device. The method obtains the morphological information of the geological interface control points by analyzing the high-precision aerial survey data, and then analyzes the obtained control points to establish the surface structure model. The embodiment of the present invention makes full use of the existing high-precision aerial survey data, extracts the formation occurrence information from it, and establishes the surface structure model, so that the modeling efficiency is greatly improved, while greatly saving the surface modeling cost, and makes full use of the existing high-precision aerial survey data, providing a reference for seismic data interpretation, and providing surface modeling support for seismic data processing. In oil and gas exploration, the constraints on the underground structure model are realized, and the velocity modeling in seismic data processing is supported.

[0054] The present invention also provides a surface structure modeling device, see Figure 5 The structure block diagram of the surface structure modeling device shown in FIG. 1 includes:

[0055] The first acquisition module 71 is used to acquire the elevation data and surface photo data of the target work area; the elevation data and surface photo data are obtained through aerial measurement; the first determination module 72 is used to determine the position of the geological interface based on the elevation data and surface photo data; the second acquisition module 73 is used to acquire the position data of multiple control points, and the control point combination of each control point; the position data of the control point is determined according to the position of the geological interface; the control point combination includes multiple control points, which are used to determine a plane; the second determination module 74 is used to determine the inclination and dip of the corresponding plane according to the control point combination of each control point; the establishment module 75 is used to establish a surface structural model of the geological interface based on multiple sets of inclinations and dips.

[0056] In one embodiment, the first determination module is specifically used to: synthesize the elevation data and the surface photo data; and determine the position of the geological interface according to the synthesis result.

[0057] In one embodiment, the second determination module is specifically used to: obtain the coordinate value and elevation value of each data point in the control point combination; fit the control points in the control point combination according to the coordinate value and the elevation value using a multivariate regression algorithm to obtain the plane equation corresponding to each control point; and determine the inclination and tilt of the plane corresponding to each control point according to the plane equation.

[0058] In one embodiment, the second determination module is specifically configured to calculate the inclination angle according to the following formula: The tendency is calculated according to the following formula: Among them, θ dip is the inclination angle, θ dipsection is the inclination, A, B and C are the coefficients of the plane equation Ax+By+Cz+D=0 at the control point, x and y are the coordinates of the data point, and z is the elevation value of the data point.

[0059] In one embodiment, the establishment module is further used to: establish surface structural models of multiple geological interfaces to obtain a surface structural model of the target work area.

[0060] The embodiment of the present invention also provides a computer device, see Figure 6 The computer device shown in the schematic block diagram comprises a memory 81 and a processor 82. The memory stores a computer program that can be run on the processor. When the processor executes the computer program, the steps of any of the above methods are implemented.

[0061] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the computer device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0062] An embodiment of the present invention further provides a computer-readable medium having a non-volatile program code executable by a processor, wherein the program code enables the processor to execute the steps of any one of the above methods.

[0063] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0064] The present invention is described with reference to flowcharts and / or block diagrams of methods and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0065] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0066] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0067] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A surface structure modeling method, characterized in that: include: Obtain elevation data and surface photo data of the target work area; The elevation data and the surface photo data are obtained through aerial survey; Determining the location of a geological interface based on the elevation data and the surface photo data; Acquire position data of a plurality of control points and a control point combination of each of the control points; the position data of the control points are determined according to the position of the geological interface; the control point combination includes a plurality of control points and is used to determine a plane; Determine the inclination and dip of the corresponding plane according to the control point combination of each control point; Establishing a surface structural model of a geological interface according to a plurality of sets of said dip angles and said inclinations; Wherein, determining the inclination and the dip of the corresponding plane according to the control point combination of each control point comprises: Obtaining the coordinate value and elevation value of each data point in the control point combination; According to the coordinate values ​​and the elevation values, the control points in the control point combination are fitted using a multiple regression algorithm to obtain a plane equation corresponding to each control point; The inclination and tilt of the plane corresponding to each control point are determined according to the plane equation.

2. The method according to claim 1, characterized in that Determining the location of a geological interface according to the elevation data and the surface photo data includes: Performing synthesis processing on the elevation data and the surface photo data; The location of the geological interface is determined based on the synthetic processing results.

3. The method according to claim 1, characterized in that: include: The inclination angle is calculated according to the following formula: The tendency is calculated according to the following formula: Among them, θ dip is the inclination angle, θ dipsection is the inclination, A, B and C are the coefficients of the plane equation Ax+By+Cz+D=0 at the control point, x and y are the coordinates of the data point, and z is the elevation value of the data point.

4. The method according to any one of claims 1 to 3, characterized in that: Also includes: Surface structural models of multiple geological interfaces are established to obtain the surface structural model of the target work area.

5. A surface structure modeling device, characterized in that: include: The first acquisition module is used to acquire elevation data and surface photo data of the target work area; The elevation data and the surface photo data are obtained through aerial survey; A first determination module is used to determine the position of the geological interface according to the elevation data and the surface photo data; A second acquisition module is used to acquire position data of a plurality of control points and a control point combination of each of the control points; the position data of the control points are determined according to the position of the geological interface; the control point combination includes a plurality of control points and is used to determine a plane; A second determination module, used to determine the inclination and the dip of the corresponding plane according to the control point combination of each control point; An establishment module is used to establish a surface structural model of a geological interface according to a plurality of groups of said dip angles and said inclinations; Wherein, the second determining module is specifically used to: Obtaining the coordinate value and elevation value of each data point in the control point combination; According to the coordinate values ​​and the elevation values, the control points in the control point combination are fitted using a multiple regression algorithm to obtain a plane equation corresponding to each control point; The inclination and tilt of the plane corresponding to each control point are determined according to the plane equation.

6. The device according to claim 5, characterized in that The first determining module is specifically configured to: Performing synthesis processing on the elevation data and the surface photo data; The location of the geological interface is determined based on the synthetic processing results.

7. The device according to claim 5, characterized in that The second determining module is specifically used to: The inclination angle is calculated according to the following formula: The tendency is calculated according to the following formula: Among them, θ dip is the inclination angle, θ dipsection is the inclination, A, B and C are the coefficients of the plane equation Ax+By+Cz+D=0 at the control point, x and y are the coordinates of the data point, and z is the elevation value of the data point.

8. The device according to any one of claims 5 to 7, characterized in that: The establishment module is also used for: Surface structural models of multiple geological interfaces are established to obtain the surface structural model of the target work area.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 4 are implemented.

10. A computer readable medium having a non-volatile program code executable by a processor, characterized in that: The program code enables the processor to execute the method according to any one of claims 1 to 4.

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