Marine controlled source electromagnetic reservoir target imaging method, device, equipment and medium

Abstract

The application belongs to the technical field of geological exploration, and provides a marine controllable source electromagnetic reservoir target imaging method, device, equipment and storage medium. The marine controllable source electromagnetic reservoir target imaging method comprises the following steps: constructing a local target model corresponding to a reservoir target body in a target exploration area according to physical property data of the target exploration area; performing inversion on the local target model to obtain complex resistivity of the reservoir target body; and obtaining three-dimensional imaging results of the reservoir target body according to the complex resistivity and outputting the three-dimensional imaging results. The application can effectively reduce non-uniqueness and improve inversion efficiency, so as to achieve the purpose of fast and high-precision three-dimensional controllable source marine electromagnetic reservoir oil and gas imaging.

Description

Technical Field

[0001] This application belongs to the field of geological exploration technology, and in particular relates to a method, device, equipment and medium for imaging marine controlled-source electromagnetic reservoir targets. Background Technology

[0002] Currently, the application of marine controlled-source electromagnetic 3D inversion in fields such as marine oil and gas exploration is becoming increasingly widespread. Typically, the models in marine controlled-source electromagnetic 3D inversion methods treat the entire subsurface space surrounding the reservoir target as an unknown geoelectric model. Therefore, regardless of the mesh generation method used, it results in an equation with millions to tens of millions of unknown parameters. The resulting sensitivity matrix during the inversion process is extremely large, consuming massive amounts of computer memory, leading to low computational efficiency and poor speed and accuracy of marine controlled-source electromagnetic reservoir target imaging. Summary of the Invention

[0003] This application provides a method, apparatus, device, and storage medium for imaging marine controlled-source electromagnetic reservoir targets, which can solve the problem of poor speed and accuracy in the existing technology of imaging marine controlled-source electromagnetic reservoir targets.

[0004] The first aspect of this application provides a method for imaging marine controlled-source electromagnetic reservoir targets, including:

[0005] Based on the physical property data of the target exploration area, construct a local target model corresponding to the reservoir target body in the strata of the target exploration area;

[0006] The complex resistivity of the reservoir target body is obtained by inverting the local target model.

[0007] Based on the complex resistivity, the three-dimensional imaging results of the reservoir target are obtained and output.

[0008] Optionally, the inversion of the local target model to obtain the complex resistivity of the reservoir target body includes:

[0009] Based on the electrical and velocity interfaces corresponding to the local target model, the complex resistivity of the reservoir target body is obtained by inverting the local target model.

[0010] Optionally, the step of inverting the local target model to obtain the complex resistivity of the reservoir target body includes:

[0011] Based on the background model corresponding to the strata of the target exploration area, the local target model is inverted to obtain the complex resistivity of the reservoir target body.

[0012] Optionally, the step of inverting the local target model based on the background model corresponding to the strata of the target exploration area to obtain the complex resistivity of the reservoir target body includes:

[0013] Based on the background model corresponding to the strata of the target exploration area and the electrical and velocity interfaces corresponding to the background model, the local target model is inverted to obtain the complex resistivity of the reservoir target body.

[0014] Optionally, the step of inverting the local target model to obtain the complex resistivity of the reservoir target body includes:

[0015] The resistivity of the local target model is inverted to obtain the resistivity model of the reservoir target body;

[0016] Based on the resistivity model, the polarizability of the local target model is inverted to obtain the polarizability model of the reservoir target body;

[0017] The complex resistivity of the reservoir target body is calculated based on the resistivity model and the resistivity model.

[0018] Optionally, obtaining and outputting the three-dimensional imaging result of the reservoir target based on the complex resistivity includes:

[0019] Based on the complex resistivity, the content of the target reservoir in the reservoir target body is calculated, and the three-dimensional imaging result of the reservoir target body is obtained and output.

[0020] Optionally, the target exploration area physical property data includes three-dimensional seismic data and well logging data of the target exploration area, and the three-dimensional imaging results include three-dimensional controlled-source marine electromagnetic reservoir oil and gas imaging results.

[0021] A second aspect of this application provides a marine controllable source electromagnetic reservoir target imaging device, comprising:

[0022] The model building module is used to construct a local target model corresponding to the reservoir target body in the strata of the target exploration area based on the physical property data of the target exploration area.

[0023] The model inversion module is used to invert the local target model to obtain the complex resistivity of the reservoir target body;

[0024] The target imaging module is used to obtain and output the three-dimensional imaging results of the reservoir target based on the complex resistivity.

[0025] Optionally, the model inversion module is specifically used to invert the local target model based on the electrical interface and velocity interface corresponding to the local target model to obtain the complex resistivity of the reservoir target body.

[0026] Optionally, the model inversion module is specifically used to invert the local target model based on the background model corresponding to the strata of the target exploration area to obtain the complex resistivity of the reservoir target body.

[0027] Optionally, the model inversion module is specifically used to invert the local target model based on the background model corresponding to the strata of the target exploration area and the electrical interface and velocity interface corresponding to the background model, so as to obtain the complex resistivity of the reservoir target body.

[0028] Optionally, the model inversion module includes:

[0029] The resistivity inversion unit is used to invert the resistivity of the local target model to obtain the resistivity model of the reservoir target body;

[0030] The polarization inversion unit is used to invert the polarization of the local target model based on the resistivity model to obtain the polarization model of the reservoir target body.

[0031] The resistance calculation unit is used to calculate the complex resistivity of the reservoir target body based on the resistivity model and the resistivity model.

[0032] Optionally, the target imaging module is specifically used to calculate the content of the target reservoir in the reservoir target body based on the complex resistivity, obtain the three-dimensional imaging result of the reservoir target body, and output it.

[0033] A third aspect of this application provides a terminal device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the marine controlled-source electromagnetic reservoir target imaging method as described above.

[0034] A fourth aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the marine controlled-source electromagnetic reservoir target imaging method as described above.

[0035] The first aspect of this application provides a marine controlled-source electromagnetic reservoir target imaging method. This method constructs a local target model corresponding to the reservoir target body in the target exploration area's strata based on the target exploration area's physical property data. The complex resistivity of the reservoir target body is obtained by inverting the local target model. A three-dimensional imaging result of the reservoir target body is obtained and output based on the complex resistivity. This method can fully utilize known seismic and drilling information to construct a local target model corresponding to the reservoir target body. Other parts of the strata in the target exploration area besides the reservoir target body are not involved in the inversion; only the complex resistivity parameters of the local target model are inverted. Since the inverted target only contains reservoir electrical properties, non-uniqueness can be effectively reduced, and inversion efficiency can be improved, thereby achieving the goal of rapid and high-precision three-dimensional controlled-source marine electromagnetic reservoir oil and gas imaging.

[0036] It is understood that the beneficial effects of the second, third and fourth aspects mentioned above can be found in the relevant descriptions in the first aspect above, and will not be repeated here. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0038] Figure 1 A schematic diagram of the first process of the marine controlled-source electromagnetic reservoir target imaging method provided in the embodiments of this application;

[0039] Figure 2 A schematic diagram of the background model and local target model provided for embodiments of this application;

[0040] Figure 3 This is a schematic diagram of a second process for the marine controlled-source electromagnetic reservoir target imaging method provided in an embodiment of this application;

[0041] Figure 4 A schematic diagram of the structure of the marine controllable source electromagnetic reservoir target imaging device provided in the embodiments of this application;

[0042] Figure 5 This is a schematic diagram of the structure of a terminal device provided in an embodiment of this application. Detailed Implementation

[0043] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of this application with unnecessary detail.

[0044] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0045] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if detected [the described condition or event]" may be interpreted, depending on the context, as meaning "once determined," "in response to determination," "once detected [the described condition or event]," or "in response to detection [the described condition or event]."

[0046] References to "one embodiment" or "some embodiments" in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized. "A plurality" means "two or more."

[0047] Example 1

[0048] Embodiment 1 of this application provides a method for marine controlled-source electromagnetic reservoir target imaging, which can be executed by the processor of a terminal device when running a corresponding computer program. It is used to construct a local target model corresponding to the reservoir target body in the strata of the target exploration area based on the physical property data of the target exploration area, invert the local target model to obtain the complex resistivity of the reservoir target body, obtain the three-dimensional imaging result of the reservoir target body based on the complex resistivity and output it. It can effectively reduce non-uniqueness and improve inversion efficiency, thereby achieving the purpose of rapid and high-precision three-dimensional controlled-source marine electromagnetic reservoir oil and gas imaging.

[0049] like Figure 1 As shown, the marine controlled-source electromagnetic reservoir target imaging method provided in this embodiment includes the following steps S11 to S13:

[0050] S11. Based on the physical property data of the target exploration area, construct a local target model corresponding to the reservoir target body in the strata of the target exploration area.

[0051] In application, the aforementioned target exploration area can be a seafloor stratigraphic exploration area requiring oil and gas identification through marine controlled-source electromagnetic exploration (SEM). The physical property data of the target exploration area can be known marine electromagnetic exploration data, i.e., data obtained from 2D or 3D seismic exploration or well logging data of the target exploration area. After the structure is confirmed by 2D or 3D seismic exploration, marine controlled-source electromagnetic exploration is used to select drilling well locations, which can be used to determine the oil and gas content and distribution range of seismic traps. The aforementioned reservoir target body can be an oil and gas-bearing reservoir. Based on the physical property data of the target exploration area, the construction of a local target model corresponding to the reservoir target body in the formation of the target exploration area can be based on seismic framework and well logging lithology modeling, constructing a local target model based on the oil and gas reservoir delineated by 3D seismic data.

[0052] In application, before constructing the local target model corresponding to the reservoir target body in the strata of the target exploration area, the physical property data of the target exploration area can be collected and statistically analyzed to obtain the geological interface G, electrical interface D, and velocity interface S of the target exploration area, where D = {d1, d2, d3, ..., d...} n}, S={s1, s2, s3..., s k If d i =s i Then G = D = S, the electrical interface and the velocity interface are the same, if d i ≠s i Then G = D∪S, meaning the geological interface is the sum of the electrical interface and the velocity interface. Similarly, by partitioning the reservoir target body, we obtain the reservoir geological interface GR and the reservoir electrical interface R = {r1, r2, r3, ..., r...}. j}, reservoir velocity interface C = {c1, c2, c3, ..., c f If r i =c i Then the reservoir geological interface GR = R = C, the reservoir electrical interface and the reservoir velocity interface are the same, if r i ≠c i Then GR=R∪C, that is, the reservoir geological interface is the sum of the reservoir electrical interface and the reservoir velocity interface.

[0053] In application, the aforementioned local target model corresponding to the reservoir target body in the target exploration area can be constructed based on the oil and gas reservoirs delineated by 3D seismic data and well logging data. Seismic reflection interfaces are then interpreted one by one based on the aforementioned reservoir velocity interfaces, establishing velocity and electrical interfaces corresponding to the aforementioned local target model. If ri≠ci, it indicates the existence of electrical interfaces between reservoir seismic interfaces. Therefore, reservoir electrical interfaces are interpolated between the reservoir seismic interfaces until the geological interfaces corresponding to the aforementioned local target model encompass all reservoir velocity and electrical interfaces, i.e., GR=R∪C.

[0054] In application, the initial values ​​of velocity and resistivity for the aforementioned local target model stratification can be given by the average value of well logging data. The resistivity of the aforementioned local target model electrical stratification is R = {r1, r2, r3, ..., r...} j-1 The speed of layering the local target model is C = {c1, c2, c3, ..., c}. f-1 The interface of the aforementioned local target model is given and does not participate in the inversion; the complex resistivity is unknown and is the target that needs to be inverted.

[0055] S12. Invert the local target model to obtain the complex resistivity of the reservoir target body. Specifically, this includes: inverting the local target model based on the electrical interface and velocity interface corresponding to the local target model to obtain the complex resistivity of the reservoir target body.

[0056] In this application, known parts of the target exploration area other than the reservoir target body are not involved in the inversion. The entire framework of the non-reservoir target body is fixed, and only the complex resistivity parameters of the local target model corresponding to the reservoir target body are inverted, thereby achieving the purpose of rapid and high-precision three-dimensional controlled-source marine electromagnetic reservoir oil and gas imaging. The inversion of the aforementioned local target model can be performed using an integral equation. The characteristic of the integral equation is that it only performs subdivision and inversion on the reservoir target body, i.e., only the local target model is inverted. When subdividing the local target model, the vertical direction is entirely determined by the seismic and logging interface, while the horizontal subdivision uses a uniform step size, which is half the distance between the measurement points, d. x =x n -x n-1 Where x is the coordinate of the measuring point, x n Let x be the coordinates of the measuring point n. n-1 Let n be the coordinates of the measuring point n-1.

[0057] S13. Based on the complex resistivity, obtain and output the three-dimensional imaging result of the reservoir target.

[0058] In application, obtaining the three-dimensional imaging result of the reservoir target based on the complex resistivity can be achieved by calculating the three-dimensional imaging result of the reservoir target using Archie's formula based on the complex resistivity. Where a represents the lithology coefficient related to lithology, b represents the lithology constant, m represents the cementation index, n represents the saturation index, and R... w The values ​​represent formation water resistivity, Φ represents porosity, and I represents the resistivity amplification factor. These are known data that can be obtained through well logging, etc. R... t The complex resistivity of the above-mentioned reservoir target body is represented by the Archie formula, which can be used to perform three-dimensional imaging of the above-mentioned reservoir target body. The three-dimensional imaging results include three-dimensional controlled-source marine electromagnetic reservoir oil and gas imaging results.

[0059] The marine controlled-source electromagnetic reservoir target imaging method provided in this application constructs a local target model corresponding to the reservoir target body in the strata of the target exploration area based on the physical property data of the target exploration area. The complex resistivity of the reservoir target body is obtained by inverting the local target model. The three-dimensional imaging result of the reservoir target body is obtained and output based on the complex resistivity. It can make full use of known seismic and drilling information to construct a local target model corresponding to the reservoir target body. Other parts of the strata in the target exploration area besides the reservoir target body do not participate in the inversion. Only the complex resistivity parameters of the local target model are inverted. Since the inverted target only has reservoir electrical properties, it can effectively reduce non-uniqueness and improve inversion efficiency, thereby achieving the purpose of rapid and high-precision three-dimensional controlled-source marine electromagnetic reservoir oil and gas imaging.

[0060] Example 2

[0061] Embodiment 2 of this application provides a marine controlled-source electromagnetic reservoir target imaging method based on Embodiment 1, which can be executed by the processor of a terminal device when running the corresponding computer program.

[0062] In one embodiment, step S12 includes: inverting the local target model based on the background model corresponding to the formation of the target exploration area to obtain the complex resistivity of the reservoir target body. Specifically, it includes: inverting the local target model based on the background model corresponding to the formation of the target exploration area and the electrical interface and velocity interface corresponding to the background model to obtain the complex resistivity of the reservoir target body.

[0063] In application, before inverting the local target model based on the background model corresponding to the strata of the target exploration area, the seismic reflection interfaces can be interpreted one by one based on the velocity interfaces of the target exploration area given by the 3D seismic data, and the velocity interfaces of the corresponding background model can be established. If d i ≠s iThis indicates the existence of independent electrical interfaces between seismic interfaces. Therefore, electrical interfaces are added through interpolation between seismic interfaces until the geological interface corresponding to the background model encompasses all velocity and electrical interfaces, i.e., G = D∪S. The formation velocity and resistivity are given by the average values ​​of well logging data. The resistivity of the electrical layer is P = {p1, p2, p3, ..., p...} n-1 The strata velocity V = {v1, v2, v3, ..., v} k-1 The formation velocity and resistivity are given by the average value of the well logging data.

[0064] like Figure 2 As shown, in application, known 3D seismic and well logging data can be used to construct a geological structural background model corresponding to complex oil and gas reservoirs, i.e., the strata of the target exploration area. In the entire background model, all known parts except the reservoir target body are not involved in the inversion. The entire framework of the non-reservoir target space is fixed, and only the complex resistivity parameters of the local target model are inverted. The reservoir target body is treated as an anomaly, and the integral equation is characterized by only partitioning and inverting the anomaly body, i.e., only inverting the local target model. The anomaly field is calculated using the integral equation method and combined with the calculated background field to obtain the total field. This yields the marine controlled-source electromagnetic field response and the corresponding apparent resistivity and phase response of the entire model. 3D interpolation is performed on the measured apparent resistivity and phase curves to ensure uniform distribution across the model grid nodes. The main inversion frequency is selected based on the depth and size of the local target model to further reduce the computational load. The nonlinear conjugate gradient method is used for iterative inversion of the 3D model, modifying only the local target model during the inversion process.

[0065] like Figure 3 As shown, in one embodiment, step S12 includes: S31, inverting the resistivity of the local target model to obtain the resistivity model of the reservoir target body; S32, inverting the polarizability of the local target model according to the resistivity model to obtain the polarizability model of the reservoir target body; S33, calculating the complex resistivity of the reservoir target body according to the resistivity model and the resistivity model.

[0066] In application, the resistivity of the reservoir target body is first inverted, followed by the polarizability, to obtain the resistivity and polarizability models of the reservoir target body. Finally, the complex resistivity of the reservoir target body is calculated based on the resistivity model and the polarizability model. An equivalent Cole-Cole complex resistivity model is introduced to characterize the electrical properties of the formation. The Cole-Cole model is... Where ρ0 is the model resistivity, ω is the angular frequency, τ is the time constant, and c is the frequency correlation coefficient. First, the resistivity of the reservoir target volume is inverted. Then, the resistivity of the set local target model is inverted. With other parameters fixed, only the resistivity ρ0 is inverted. The resistivity model range is defined. Based on electrical logging data, The minimum resistivity of the model. This represents the maximum resistivity of the model.

[0067] In application, after obtaining the resistivity model, the polarizability η of the local target model is inverted. The resistivity model uses the inversion result above and remains unchanged. The electrical properties are characterized using a complex resistivity equivalent model. Only the polarizability η is inverted, while other parameters remain unchanged. The model range for polarizability... It is determined by the results of induced polarization logging or core polarization rate testing in the exploration area. The minimum polarizability of the model. To obtain the maximum polarizability of the model, the polarizability η of the local target model is obtained through inversion, and then the complex resistivity ρ of the reservoir target body is calculated. * By introducing the induced polarization effect, the ambiguity of non-oil and gas targets can be eliminated more effectively.

[0068] In one embodiment, step S13 includes: calculating the content of the target reservoir in the reservoir target body based on the complex resistivity, obtaining the three-dimensional imaging result of the reservoir target body and outputting it.

[0069] In application, the three-dimensional imaging result of the reservoir target body obtained based on the complex resistivity can be obtained by calculating the oil saturation of the reservoir using Archie's formula based on the complex resistivity, thereby performing three-dimensional imaging of the oil and gas in the reservoir.

[0070] The marine controlled-source electromagnetic reservoir target imaging method provided in this application determines the stratigraphic interface of the target exploration area based on its physical property data. It establishes a three-dimensional electrical structure model and lithological model of the seafloor strata based on 3D seismic and well logging data. The reservoir target body is treated as an anomaly in the integral equation, while the rest are used as the background model. The resistivity and polarizability of the reservoir target body are inverted step by step, and the complex resistivity is calculated. The reservoir oil saturation is calculated using Archie's formula, achieving rapid imaging of reservoir oil content. Since the inverted target only contains reservoir electrical properties, non-uniqueness is effectively reduced, and inversion efficiency is improved. Furthermore, the introduction of induced polarization effects can more effectively eliminate the ambiguity of non-oil and gas targets.

[0071] Example 3

[0072] like Figure 4 As shown, this embodiment also provides a marine controlled-source electromagnetic reservoir target imaging device, the marine controlled-source electromagnetic reservoir target imaging device 400 comprising:

[0073] The model building module 401 is used to build a local target model corresponding to the reservoir target body in the strata of the target exploration area based on the physical property data of the target exploration area.

[0074] The model inversion module 402 is used to invert the local target model to obtain the complex resistivity of the reservoir target body;

[0075] The target imaging module 403 is used to obtain and output the three-dimensional imaging result of the reservoir target body based on the complex resistivity.

[0076] Optionally, the model inversion module 402 is specifically used to invert the local target model based on the electrical interface and velocity interface corresponding to the local target model to obtain the complex resistivity of the reservoir target body.

[0077] Optionally, the model inversion module 402 is specifically used to invert the local target model based on the background model corresponding to the strata of the target exploration area to obtain the complex resistivity of the reservoir target body.

[0078] Optionally, the model inversion module 402 is specifically used to invert the local target model based on the background model corresponding to the strata of the target exploration area and the electrical interface and velocity interface corresponding to the background model, so as to obtain the complex resistivity of the reservoir target body.

[0079] Optionally, the model inversion module 402 includes:

[0080] The resistivity inversion unit is used to invert the resistivity of the local target model to obtain the resistivity model of the reservoir target body;

[0081] The polarization inversion unit is used to invert the polarization of the local target model based on the resistivity model to obtain the polarization model of the reservoir target body.

[0082] The resistance calculation unit is used to calculate the complex resistivity of the reservoir target body based on the resistivity model and the resistivity model.

[0083] Optionally, the target imaging module 403 is specifically used to calculate the content of the target reservoir in the reservoir target body based on the complex resistivity, obtain the three-dimensional imaging result of the reservoir target body and output it.

[0084] It should be noted that the information interaction and execution process between the above-mentioned devices / units are based on the same concept as the method embodiments of this application. For details on their specific functions and technical effects, please refer to the method embodiments section, and they will not be repeated here.

[0085] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0086] This application also provides a terminal device 500, such as... Figure 5 As shown, it includes a memory 501, a processor 502, and a computer program 503 stored in the memory 501 and executable on the processor 502. When the processor 502 executes the computer program 503, it implements the steps of the marine controlled-source electromagnetic reservoir target imaging method provided in the first aspect.

[0087] In applications, terminal devices may include, but are not limited to, processors and memory. Figure 5 This is merely an example of a terminal device and does not constitute a limitation on the terminal device. It may include more or fewer components than illustrated, or a combination of certain components, or different components, such as input / output devices, network access devices, etc. Input / output devices may include cameras, audio capture / playback devices, displays, etc. Network access devices may include network modules for wireless network communication with external devices.

[0088] In applications, the processor can be a Central Processing Unit (CPU), but it can also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor.

[0089] In applications, the memory may be an internal storage unit of the terminal device in some embodiments, such as the hard drive or RAM of the terminal device. In other embodiments, the memory may be an external storage device of the terminal device, such as a plug-in hard drive, Smart Media Card (SMC), Secure Digital (SD) card, or Flash Card. The memory may also include both internal and external storage units of the terminal device. The memory is used to store the operating system, applications, boot loader, data, and other programs, such as the program code of computer programs. The memory can also be used to temporarily store data that has been output or will be output.

[0090] This application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, can implement the steps in the above-described method embodiments.

[0091] This application implements all or part of the processes in the methods of the above embodiments, which can be accomplished by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable file, or some intermediate form. The computer-readable medium can include at least: any entity or device capable of carrying the computer program code to a terminal device, a recording medium, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium, such as a USB flash drive, a portable hard drive, a magnetic disk, or an optical disk.

[0092] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0093] Those skilled in the art will recognize that the device and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0094] In the embodiments provided in this 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 merely illustrative. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interface, or the device may be indirectly coupled or communicated, and may be electrical, mechanical, or other forms.

[0095] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A method for imaging marine controlled-source electromagnetic reservoir targets, characterized in that, include: Based on the physical property data of the target exploration area, a local target model corresponding to the reservoir target body in the strata of the target exploration area is constructed. Specifically, based on seismic framework and well logging lithology modeling, the local target model is constructed from the oil and gas reservoirs delineated by 3D seismic data. Before constructing the local target model, physical property data of the target exploration area are collected and statistically analyzed to obtain the geological interface G, electrical interface D, and velocity interface S of the target exploration area, where D = {d1, d2, d3, ..., d...}. n }, S={s1, s2, s3..., s k }; if d i =s i If d i ≠s i Then G = D∪S; The complex resistivity of the reservoir target body is obtained by inverting the local target model, including: inverting the resistivity of the local target model to obtain the resistivity model of the reservoir target body; inverting the polarizability of the local target model according to the resistivity model to obtain the polarizability model of the reservoir target body; and calculating the complex resistivity of the reservoir target body according to the resistivity model and the polarizability model. Based on the complex resistivity, the content of the target reservoir in the reservoir target body is calculated using the Archie formula, and a three-dimensional imaging result of the reservoir target body is generated and output.

2. The marine controlled-source electromagnetic reservoir target imaging method as described in claim 1, characterized in that, The inversion of the local target model to obtain the complex resistivity of the reservoir target body includes: Based on the electrical and velocity interfaces corresponding to the local target model, the complex resistivity of the reservoir target body is obtained by inverting the local target model.

3. The marine controlled-source electromagnetic reservoir target imaging method as described in claim 1, characterized in that, The inversion of the local target model to obtain the complex resistivity of the reservoir target body includes: Based on the background model corresponding to the strata of the target exploration area, the local target model is inverted to obtain the complex resistivity of the reservoir target body.

4. The marine controlled-source electromagnetic reservoir target imaging method as described in claim 3, characterized in that, The step of inverting the local target model based on the background model corresponding to the strata of the target exploration area to obtain the complex resistivity of the reservoir target body includes: Based on the background model corresponding to the strata of the target exploration area and the electrical and velocity interfaces corresponding to the background model, the local target model is inverted to obtain the complex resistivity of the reservoir target body.

5. The marine controlled-source electromagnetic reservoir target imaging method as described in claim 1, characterized in that, The target exploration area physical property data includes three-dimensional seismic data and well logging data of the target exploration area, and the three-dimensional imaging results include three-dimensional controlled-source marine electromagnetic reservoir oil and gas imaging results.

6. A marine controllable source electromagnetic reservoir target imaging device, characterized in that, include: The model building module is used to construct local target models corresponding to reservoir targets in the formation of the target exploration area based on the physical property data of the target exploration area. Specifically, based on seismic framework and well logging lithology modeling, the local target models are constructed from oil and gas reservoirs delineated using 3D seismic data. Before constructing the local target models, physical property data of the target exploration area are collected and statistically analyzed to obtain the geological interface G, electrical interface D, and velocity interface S of the target exploration area, where D = {d1, d2, d3, ..., d...}. n }, S={s1, s2, s3..., s k }; if d i =s i If d i ≠s i Then G = D∪S; The model inversion module is used to invert the local target model to obtain the complex resistivity of the reservoir target body; The target imaging module is used to calculate the content of the target reservoir in the reservoir target body according to the complex resistivity using the Archie formula, and to generate and output the three-dimensional imaging result of the reservoir target body; The model inversion module includes: The resistivity inversion unit is used to invert the resistivity of the local target model to obtain the resistivity model of the reservoir target body; The polarization inversion unit is used to invert the polarization of the local target model based on the resistivity model to obtain the polarization model of the reservoir target body. The resistance calculation unit is used to calculate the complex resistivity of the reservoir target body based on the resistivity model and the resistivity model.

7. A terminal device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the marine controlled-source electromagnetic reservoir target imaging method as described in any one of claims 1 to 5.

8. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the marine controlled-source electromagnetic reservoir target imaging method as described in any one of claims 1 to 5.

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