Modeling method and system for meandering river channel physical property distribution based on directional trend constraints

Abstract

The present invention discloses a modeling method and system for physical property distribution of meandering river channel based on directional trend constraint, and the method comprises the following steps: transmitting river channel scale, curvature parameter and physical property parameter to PETREL modeling software; establishing a meandering river channel phase model according to the river channel scale and the curvature parameter; establishing water flow direction trend surfaces corresponding to each small layer of river channel sand body in the meandering river channel phase model, and accumulating the water flow direction trend surfaces corresponding to each small layer to obtain a three-dimensional directional trend body characterizing the river direction; establishing a three-dimensional physical property trend body characterizing the physical property change characteristics inside the meandering river channel according to the physical property parameters; establishing a physical property model of the meandering river channel in the study area according to the three-dimensional directional trend body and the three-dimensional physical property trend body; thereby solving the problem of striped simulation results caused by the physical property model being heavily dependent on the single material source direction set by the variation function in the random modeling process.

Description

Technical Field

[0001] The invention relates to the technical field of oil reservoir description, and in particular to a modeling method and system for physical property distribution of meandering river channels constrained by directional trends. Background Art

[0002] The meandering river sand body is one of the most important oil and gas reservoirs in terrestrial clastic rocks. The meandering river channel is generally a single channel with a relatively stable channel. From the perspective of the source-sink sedimentary system, the source direction of the meandering river channel is single, but its internal curvature is strong, and the curvature index is generally greater than 1.5, which is prone to bend straightening. The flow direction at different locations in the river channel changes dramatically. In the traditional modeling process, it is easy to cause discontinuity in the simulation of the target body only through the calculation of the variogram, and the source direction set in the variogram is distributed in a strip-like manner, which can easily cause poor channel morphology and continuity in the simulation results. Summary of the invention

[0003] The present invention provides a modeling method and system for the distribution of physical properties of meandering rivers based on directional trend constraints, so as to solve the problem of striped simulation results caused by the physical property model being heavily dependent on a single source direction set by a variogram in the random modeling process.

[0004] In a first aspect, a modeling method for physical property distribution of meandering river channels based on directional trend constraints is provided, comprising the following steps:

[0005] Obtain the channel scale, sinuosity parameters and physical property parameters of the meandering river in the study area, and transmit the channel scale, sinuosity parameters and physical property parameters to the PETREL modeling software;

[0006] Establishing a meandering river channel facies model according to the river channel scale and the curvature parameter;

[0007] Establishing the water flow direction trend surface corresponding to each small layer of the river channel sand body in the meandering river phase model, and accumulating the water flow direction trend surface corresponding to each small layer to obtain a three-dimensional direction trend body representing the river direction;

[0008] According to the physical property parameters, a three-dimensional physical property trend body is established to characterize the physical property change characteristics inside the meandering river channel;

[0009] A physical property model of the meandering river in the study area is established based on the three-dimensional directional trend body and the three-dimensional physical property trend body.

[0010] According to the first aspect, in a first possible implementation manner of the first aspect, the step of “obtaining the channel scale and curvature parameters of the meandering channel in the study area” specifically includes the following steps:

[0011] Target modern deposits with similar sedimentary background to the meandering river channel in the study area were selected, and the channel scale and channel curvature index of the target modern deposits were measured based on Google Earth and Global Map software.

[0012] According to the first aspect, in a second possible implementation manner of the first aspect, the step of “obtaining physical property parameters of meandering channels in the study area” specifically includes the following steps:

[0013] The physical property parameters of the meandering channel are obtained based on the drilling data in the study area, and the physical property parameters include the maximum value, minimum value, average value and standard deviation of the porosity of the meandering channel.

[0014] According to the first aspect, in a third possible implementation manner of the first aspect, the step of “establishing a meandering channel phase model according to the channel scale and the curvature parameter” specifically includes the following steps:

[0015] Building a three-dimensional grid frame representing the scale of the river channel in the PETREL modeling software, and setting the plane step size and vertical step size of the three-dimensional grid frame;

[0016] According to the channel scale and the curvature parameters, a meandering channel facies model is established on the three-dimensional grid framework based on a target modeling method.

[0017] According to the first aspect, in a fourth possible implementation of the first aspect, the step of “establishing a water flow direction trend surface corresponding to each small layer of the channel sand body in the meandering channel facies model” specifically includes the following steps:

[0018] Obtaining the channel distribution of each small layer of the channel sand body in the meandering channel facies model, and obtaining the azimuth angle data of the water flow direction at different grid positions in the channel distribution of each small layer;

[0019] According to the azimuth angle data of water flow direction in each sublayer, the trend surface of water flow direction corresponding to each sublayer is established.

[0020] According to the first aspect, in a fifth possible implementation manner of the first aspect, the step of “establishing a physical property model of the meandering channel in the study area according to the three-dimensional directional trend body and the three-dimensional physical property trend body” specifically includes the following steps:

[0021] Taking the three-dimensional directional trend body and the reference three-dimensional trend body as modeling constraints, based on the sequential Gaussian simulation method in two-point geostatistics and according to the physical property parameters, a physical property model of the meandering river in the study area is established.

[0022] In the second aspect, a modeling system for meandering channel physical property distribution based on directional trend constraints is provided, comprising:

[0023] A data acquisition module, used to obtain the channel scale, sinuosity parameters and physical property parameters of the meandering river in the study area, and transmit the channel scale, sinuosity parameters and physical property parameters to the PETREL modeling software;

[0024] A river channel phase model building module, which is in communication with the data acquisition module and is used to build a meandering river channel phase model according to the river channel scale and the curvature parameter;

[0025] A direction trend body establishment module is connected to the channel phase model establishment module for establishing a water flow direction trend surface corresponding to each small layer of the channel sand body in the meandering channel phase model, and accumulating the water flow direction trend surface corresponding to each small layer to obtain a three-dimensional direction trend body representing the direction of the river;

[0026] A physical property trend body establishment model is connected to the data acquisition module for establishing a three-dimensional physical property trend body that characterizes the physical property change characteristics inside the meandering river channel according to the physical property parameters; and

[0027] The physical property model building module is connected to the direction trend body building module and the physical property trend body building model, and is used to build a physical property model of the meandering river in the study area according to the physical property parameters and the three-dimensional trend body of the meandering river in the study area.

[0028] In a third aspect, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the modeling method of the physical property distribution of a meandering river channel based on directional trend constraints as described above is implemented.

[0029] In a fourth aspect, an electronic device is provided, comprising a storage medium, a processor, and a computer program stored in the storage medium and executable on the processor, wherein when the processor runs the computer program, the modeling method for the distribution of physical properties of a meandering river channel based on directional trend constraints as described above is implemented.

[0030] Compared with the prior art, the advantages of the present invention are as follows: by introducing the three-dimensional trend body of the meandering river channel that represents the river direction into the physical property modeling process, the physical property morphology and continuity characteristics inside the river channel can be effectively simulated, a geological model that is closer to geological laws can be established, and a more accurate physical property model can be provided for reservoir numerical simulation. Therefore, the problem of the striped simulation results caused by the physical property model being heavily dependent on the single source direction set by the variogram in the random modeling process is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a flow chart of a modeling method for physical property distribution of meandering river channel based on directional trend constraints of the present invention;

[0032] Figure 2 It is a schematic diagram of the present invention for measuring the scale of meandering channels based on modern sedimentation;

[0033] Figure 3 The present invention is based on the statistics of the physical property (porosity) distribution in the river channel obtained from the underground reservoir in the study area;

[0034] Figure 4 is a schematic diagram of a three-dimensional grid framework established by the present invention;

[0035] Figure 5 It is a schematic diagram of the meandering river channel facies model established by the present invention;

[0036] Figure 6 It is a schematic diagram of the definition of the water flow direction at different small layers of the river channel according to the present invention;

[0037] Figure 7 It is a water flow direction trend surface of a small layer in the meandering river channel of the present invention;

[0038] Figure 8 It is a schematic diagram of a three-dimensional directional trend body established by the present invention;

[0039] Fig. 9 It is a schematic diagram of a three-dimensional physical property trend body established by the present invention;

[0040] Fig.10 It is the physical property model and cross-section of the meandering river channel of the present invention. DETAILED DESCRIPTION

[0041] Reference will now be made in detail to specific embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Although the present invention will be described in conjunction with specific embodiments, it will be understood that it is not intended to limit the present invention to the embodiments described. On the contrary, it is intended to cover changes, modifications and equivalents included in the spirit and scope of the present invention as defined by the appended claims. It should be noted that the method steps described herein can all be implemented by any functional block or functional arrangement, and any functional block or functional arrangement can be implemented as a physical entity or a logical entity, or a combination of the two.

[0042] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0043] Note: The example to be introduced below is only a specific example, and is not intended to limit the embodiments of the present invention to the following specific steps, values, conditions, data, sequences, etc. Those skilled in the art can apply the concept of the present invention to construct more embodiments not mentioned in this specification by reading this specification.

[0044] See also Figure 1As shown, an embodiment of the present invention provides a modeling method for meandering channel physical property distribution based on directional trend constraints, comprising the following steps:

[0045] S100, obtain the river scale of meandering rivers in the study area (see Figure 2 As shown), tortuosity parameters and physical property parameters, and transmitting the river channel scale, the tortuosity parameters and the physical property parameters to PETREL modeling software;

[0046] S200, establishing a meandering river channel facies model according to the river channel scale and the curvature parameter;

[0047] S300, establishing a water flow direction trend surface corresponding to each small layer of the river channel sand body in the meandering river facies model, and accumulating the water flow direction trend surfaces corresponding to each small layer to obtain a three-dimensional direction trend body representing the river direction;

[0048] S400, establishing a three-dimensional physical property trend body representing the physical property change characteristics inside the meandering channel according to the physical property parameters;

[0049] S500: establishing a physical property model of the meandering river in the study area according to the three-dimensional directional trend body and the three-dimensional physical property trend body.

[0050] A physical property model of the meandering channel in the study area is established based on the physical property parameters and the three-dimensional trend body of the meandering channel in the study area.

[0051] Specifically, in this embodiment, in the traditional process of constructing the meander channel physical property model, it is easy to cause the simulation of the target body to be discontinuous only by calculating the variogram, and the source direction set in the variogram is distributed in a strip shape, resulting in poor river channel morphology and continuity in the simulation results. Therefore, in response to the above problems, the present invention introduces the three-dimensional trend body of the meander channel that characterizes the river direction into the physical property modeling process, which can effectively simulate the physical property morphology and continuity characteristics inside the river channel, establish a geological model that is closer to geological laws, and provide a more accurate physical property model for reservoir numerical simulation. Therefore, the problem of strip-like simulation results caused by the physical property model being heavily dependent on the single source direction set by the variogram in the random modeling process is solved.

[0052] Preferably, in another embodiment of the present application, the step of "S100, obtaining the channel scale and curvature parameters of the meandering channel in the study area" specifically includes the following steps:

[0053] Target modern deposits with similar sedimentary background to the meandering river channel in the study area were selected, and the channel scale and channel curvature index of the target modern deposits were measured based on Google Earth and Global Map software.

[0054] Specifically, in this embodiment, the idea of ​​using the present to explain the past is used in geological research to restore and reconstruct modern sediments as an important medium to reflect ancient sediments. By selecting target modern sediments with similar sedimentary backgrounds to the reservoirs in the study area, such as meandering river sediments, Figure 2 Based on Google Earth and Global Map software, the width and channel curvature index of the target modern sediments were measured, as shown in Table 1. Figure 2 The width of the meandering channel ranges from 40m to 280m, the average width of the meandering channel is 170m, the curvature index is between 1.2 and 2.3, and the average curvature index is 1.78.

[0055] It should be noted that the tortuosity index is the ratio of the actual length of the river section to the straight length. The larger the tortuosity index, the more tortuous the river section.

[0056] Table 1

[0057]

[0058] Preferably, in another embodiment of the present application, the step of "S100, obtaining physical property parameters of meandering channels in the study area" specifically includes the following steps:

[0059] The physical property parameters of the meandering channel are obtained based on the drilling data in the study area, and the physical property parameters include the maximum value, minimum value, average value and standard deviation of the porosity of the meandering channel.

[0060] Specifically, in this embodiment, since the study area is an underground oil and gas field and the study location is buried deep underground, only the logging curve data of the drilling location and the core data of the coring well can be obtained. Therefore, the present invention obtains the physical property values ​​(porosity) of different locations based on the core sample measurement of the coring well. For example, a total of 772 core porosity measurement data of 15 coring wells in the study area are collected, such as Figure 3 The core porosity of 15 core wells in the study area was analyzed, and it was concluded that the minimum porosity in the study area was 10.51%, the average was 22.48%, the maximum was 27.95%, and the standard deviation was 2.94, as shown in Table 2.

[0061] Table 2

[0062]

[0063] Preferably, in another embodiment of the present application, the step of "S200, establishing a meandering river channel phase model according to the river channel scale and the curvature parameter" specifically includes the following steps:

[0064] S210, constructing a three-dimensional grid frame representing the scale of the river channel in PETREL modeling software, and setting a plane step size and a vertical step size of the three-dimensional grid frame;

[0065] S220, establishing a meandering river channel facies model on the three-dimensional grid frame based on a target modeling method according to the river channel scale and the curvature parameter.

[0066] Specifically, in this embodiment, according to the scale of the meandering river, a three-dimensional grid frame suitable for characterizing the scale of a similar meandering river is constructed, such as Figure 4 As shown, the single plane grid step size is set to 10m×10m, the single vertical grid step size is set to 0.2m, and the total number of grids is 450×600×60=16,200,000.

[0067] According to the meandering channel scale and the bending parameters, a meandering channel phase model is established by using a target-based modeling method, such as Figure 5 The meandering channel facies model includes background mud and meandering channel sand bodies. The method of the present invention mainly constrains the physical properties of the channel sand bodies and visualizes the meandering channel sand bodies separately, as shown in FIG. Figure 5 As shown in b.

[0068] Preferably, in another embodiment of the present application, the step of "S300, establishing a water flow direction trend surface corresponding to each small layer of the river channel sand body in the meandering river channel facies model" specifically includes the following steps:

[0069] S310, obtaining the channel distribution of each small layer of the channel sand body in the meandering channel facies model, and obtaining the azimuth angle data of the water flow direction at different grid positions in the channel distribution of each small layer;

[0070] S320, establishing a water flow direction trend surface corresponding to each sublayer according to the water flow direction azimuth data of each sublayer.

[0071] Specifically, in this embodiment, the channel distribution characteristics of different small layers of the river sand body are obtained based on the meandering river phase model. The width of the river channel gradually narrows from top to bottom, and in the cross section, the river channel has the morphological characteristics of a flat top and a convex bottom. At the same time, the water flow direction of different small layers is obtained according to the scale characteristics of the sand bodies in each small layer, and the water flow direction trend surface of different small layers is established. For example, based on the meandering river phase model, the channel distribution characteristics of the 1st layer and the 12th layer are obtained, respectively as follows: Figure 6a, 6b. The river channel tends to gradually narrow from the top to the bottom, and the midline positions of different sub-layers of the river channel are also different. As the scale characteristics of the river channel change, the direction of the water flow also changes slightly. The direction of the water flow is quantified by an angle value, ranging from 0° to 360°. The direction of the water flow in the river channel is mainly 0°. In areas where the river channel is more curved, the azimuth is distributed in the range of -40° to 40°. Therefore, the azimuth data of the river channel at different grid positions in the plane are obtained, and the directional trend surface of each sub-layer is established. The first layer of water flow direction trend surface in the meandering river in the study area can be seen Figure 7 ,The azimuth data changes dramatically when the river flow direction is at the place where the river is most curved.

[0072] Then, according to the water flow direction trend surface of each different sub-layer, a three-dimensional directional trend body is obtained by accumulating the two-dimensional trend surfaces of different sub-layers. The three-dimensional directional trend body represents the spatial combination of the water flow direction of all single grid bodies inside the meandering river channel, and the step size of the single grid body is set to 10m×10m×0.2m. For example, when the source of the meandering river channel in the study area is entirely from the southern region, Figure 8 It shows that the river section in the study area has undergone a continuous change process from southeast to north to northeast to north to southeast, characterizing the distribution characteristics of water flow and sand body during the river evolution stage.

[0073] Preferably, in another embodiment of the present application, for the step of "S400, establishing a three-dimensional physical property trend body characterizing the physical property change characteristics inside the meandering channel according to the physical property parameters", since the grain size and physical property characteristics of the sand body inside the channel have the characteristics of gradually decreasing physical properties from bottom to top and from the center of the channel to both sides, the existing three-dimensional trend body modeling technology is used to establish a three-dimensional physical property trend body characterizing the gradual change trend of the physical properties of the meandering channel in the study area to constrain the physical property modeling process and constrain the gradual change law from top to bottom and from the center to both sides of the channel. For details, see Fig. 9 shown.

[0074] Preferably, in another embodiment of the present application, the step of "S500, establishing a physical property model of the meandering channel in the study area according to the physical property parameters and the three-dimensional trend body of the meandering channel in the study area" specifically includes the following steps:

[0075] Taking the three-dimensional directional trend body and the reference three-dimensional trend body as modeling constraints, based on the sequential Gaussian simulation method in two-point geostatistics and according to the physical property parameters, a physical property model of the meandering river in the study area is established.

[0076] Specifically, in this embodiment, during the sedimentary evolution of the meandering river, due to the influence of intermittent flood events, the water flow scours and erodes the outer concave bank of the meandering river channel, and the sand body is laterally accumulated and retained on the convex bank inside the river channel. The river channel migrates laterally to form a number of lateral accumulation bodies with storage capacity. Eventually, the river channel sand body with better physical properties (an aggregate of several lateral accumulation bodies) is retained on the convex bank of the river channel. The continuous occurrence of intermittent floods leads to the continuous lateral accumulation, and the sediments retained on the concave bank of the river channel are finer in particle size, generally mud deposits, which have a finer particle size and poorer physical properties. Therefore, on the plane, the convex bank has better physical properties and is a good oil and gas reservoir, while the concave bank has poor physical properties. Comprehensively, according to the three-dimensional directional trend body constraining the sand body distribution direction, such as Figure 8 As shown; the three-dimensional physical property distribution trend body established according to the existing three-dimensional trend body modeling technology constrains the gradual change law of the internal physical properties of the meandering river channel, as shown Fig. 9 As shown in the figure; under the phase control constraint, based on the above three-dimensional directional trend body and three-dimensional physical property trend body, the physical property porosity model of the meandering river in the study area is established by using the sequential Gaussian simulation method in two-point geostatistics. From the plane, the distribution characteristics of the physical properties inside the river channel are affected by the directional trend and the lateral trend of decreasing from the center to both sides. The physical properties are better near the convex bank of the river channel, and the physical properties are worse at the concave bank of the river channel, such as Fig.10 a. From the profile results, the profile position is as follows Fig.10 As shown in a, constrained by the physical property trend body inside the river channel, the physical property model represents the trend of physical properties getting better from top to bottom. The physical properties in the middle and lower parts of the river channel are the best. Point B is located on the convex bank of the river channel and has good physical properties. Point A is located on the concave bank of the river channel and its nearby physical properties are poor. Fig.10 Therefore, compared with the simple phase-controlled constraint modeling technology, the simulation results of this physical property model are more consistent with geological knowledge and the understanding obtained from field outcrops, and it provides a modeling method that can be used as a reference for the characterization of the internal physical property development characteristics of similar meandering rivers.

[0077] An embodiment of the present invention provides a modeling system for meandering channel physical property distribution based on directional trend constraints, comprising:

[0078] A data acquisition module, used to obtain the channel scale, sinuosity parameters and physical property parameters of the meandering river in the study area, and transmit the channel scale, sinuosity parameters and physical property parameters to the PETREL modeling software;

[0079] A river channel phase model building module, which is in communication with the data acquisition module and is used to build a meandering river channel phase model according to the river channel scale and the curvature parameter;

[0080] A direction trend body establishment module is connected to the channel phase model establishment module for establishing a water flow direction trend surface corresponding to each small layer of the channel sand body in the meandering channel phase model, and accumulating the water flow direction trend surface corresponding to each small layer to obtain a three-dimensional direction trend body representing the direction of the river;

[0081] A physical property trend body establishment model is connected to the data acquisition module for establishing a three-dimensional physical property trend body that characterizes the physical property change characteristics inside the meandering river channel according to the physical property parameters; and

[0082] The physical property model building module is connected to the direction trend body building module and the physical property trend body building model, and is used to build a physical property model of the meandering river in the study area according to the physical property parameters and the three-dimensional trend body of the meandering river in the study area.

[0083] In the traditional process of constructing the meander channel physical property model, it is easy to cause the simulation of the target body to be discontinuous only by calculating the variogram, and the source direction set in the variogram is distributed in a strip-like manner, resulting in poor channel morphology and continuity in the simulation results. Therefore, in order to solve the above problems, the present invention introduces the three-dimensional trend body of the meander channel that characterizes the river direction into the physical property modeling process, which can effectively simulate the physical property morphology and continuity characteristics inside the river channel, establish a geological model that is closer to geological laws, and provide a more accurate physical property model for reservoir numerical simulation. Therefore, the problem of strip-like simulation results caused by the physical property model being heavily dependent on the single source direction set by the variogram in the random modeling process is solved.

[0084] Specifically, this embodiment corresponds one-to-one to the above method embodiment, and the functions of each module have been described in detail in the corresponding method embodiment, so they will not be repeated here.

[0085] Based on the same inventive concept, an embodiment of the present application further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, all or part of the method steps of the above method are implemented.

[0086] The present invention implements all or part of the processes in the above method, and can also be completed by instructing related hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of each of the above method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device that can carry computer program code, recording medium, USB flash drive, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, RandomAccess Memory), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electric carrier signals and telecommunication signals.

[0087] Based on the same inventive concept, an embodiment of the present application also provides an electronic device, including a memory and a processor, wherein the memory stores a computer program running on the processor, and when the processor executes the computer program, all or part of the method steps in the above method are implemented.

[0088] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of a computer device, and uses various interfaces and lines to connect various parts of the entire computer device.

[0089] The memory can be used to store computer programs and / or modules. The processor realizes various functions of the computer device by running or executing the computer programs and / or modules stored in the memory and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system and an application required for at least one function (such as a sound playback function, an image playback function, etc.); the data storage area can store data created according to the use of the mobile phone (such as audio data, video data, etc.). In addition, the memory can include a high-speed random access memory and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (SmartMedia Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0090] It should be understood by those skilled in the art that the embodiments of the present invention may be provided as methods, systems, servers 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 and optical storage, etc.) containing computer-usable program code.

[0091] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), servers, 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 a 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 produce a machine, so that 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.

[0092] 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.

[0093] 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 in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0094] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A modeling method for the distribution of physical properties of meandering rivers based on directional trend constraints, characterized in that: The following steps are involved: Obtain the channel scale, sinuosity parameters and physical property parameters of the meandering river in the study area, and transmit the channel scale, sinuosity parameters and physical property parameters to the PETREL modeling software; Establishing a meandering river channel facies model according to the river channel scale and the curvature parameter; Establishing the water flow direction trend surface corresponding to each small layer of the river channel sand body in the meandering river phase model, and accumulating the water flow direction trend surface corresponding to each small layer to obtain a three-dimensional direction trend body representing the river direction; According to the physical property parameters, a three-dimensional physical property trend body is established to characterize the physical property change characteristics inside the meandering river channel; A physical property model of the meandering river in the study area is established based on the three-dimensional directional trend body and the three-dimensional physical property trend body.

2. The modeling method for meandering river channel physical property distribution based on directional trend constraints according to claim 1 is characterized in that: The step of "obtaining the channel scale and curvature parameters of the meandering river in the study area" specifically includes the following steps: Target modern deposits with similar sedimentary background to the meandering river channel in the study area were selected, and the channel scale and channel curvature index of the target modern deposits were measured based on Google Earth and Global Map software.

3. The modeling method for meandering river channel physical property distribution based on directional trend constraints according to claim 1, characterized in that: The step of "obtaining the physical property parameters of the meandering river channel in the study area" specifically includes the following steps: The physical property parameters of the meandering channel are obtained based on the drilling data in the study area, and the physical property parameters include the maximum value, minimum value, average value and standard deviation of the porosity of the meandering channel.

4. The modeling method for meandering river channel physical property distribution based on directional trend constraints according to claim 1, characterized in that: The step of "establishing a meandering river channel phase model according to the river channel scale and the curvature parameter" specifically includes the following steps: Building a three-dimensional grid frame representing the scale of the river channel in the PETREL modeling software, and setting the plane step size and vertical step size of the three-dimensional grid frame; According to the channel scale and the curvature parameters, a meandering channel facies model is established on the three-dimensional grid framework based on a target modeling method.

5. The modeling method for meandering river channel physical property distribution based on directional trend constraints according to claim 1, characterized in that: The step of "establishing the water flow direction trend surface corresponding to each small layer of the river channel sand body in the meandering river channel facies model" specifically includes the following steps: Obtaining the channel distribution of each small layer of the channel sand body in the meandering channel facies model, and obtaining the azimuth angle data of the water flow direction at different grid positions in the channel distribution of each small layer; According to the azimuth angle data of water flow direction in each sublayer, the trend surface of water flow direction corresponding to each sublayer is established.

6. The modeling method for meandering river channel physical property distribution based on directional trend constraints according to claim 1, characterized in that: The step of "establishing a physical property model of the meandering river channel in the study area according to the three-dimensional directional trend body and the three-dimensional physical property trend body" specifically includes the following steps: Taking the three-dimensional directional trend body and the three-dimensional physical property trend body as modeling constraints, based on the sequential Gaussian simulation method in two-point geostatistics and according to the physical property parameters, a physical property model of the meandering river in the study area is established.

7. A modeling system for meandering channel physical property distribution based on directional trend constraints, characterized in that: include: A data acquisition module, used to obtain the channel scale, sinuosity parameters and physical property parameters of the meandering river in the study area, and transmit the channel scale, sinuosity parameters and physical property parameters to the PETREL modeling software; A river channel phase model building module, which is in communication with the data acquisition module and is used to build a meandering river channel phase model according to the river channel scale and the curvature parameter; A direction trend body establishment module is connected to the channel phase model establishment module for establishing a water flow direction trend surface corresponding to each small layer of the channel sand body in the meandering channel phase model, and accumulating the water flow direction trend surface corresponding to each small layer to obtain a three-dimensional direction trend body representing the direction of the river; A physical property trend body establishment model is connected to the data acquisition module for establishing a three-dimensional physical property trend body that characterizes the physical property change characteristics inside the meandering river channel according to the physical property parameters; and The physical property model building module is connected to the direction trend body building module and the physical property trend body building model, and is used to build a physical property model of the meandering river in the study area according to the physical property parameters and the three-dimensional trend body of the meandering river in the study area.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the modeling method for meandering channel physical property distribution based on directional trend constraints as described in any one of claims 1 to 6 is implemented.

9. An electronic device comprising a storage medium, a processor, and a computer program stored in the storage medium and executable on the processor, characterized in that: When the processor runs the computer program, it implements the modeling method for meandering channel physical property distribution based on directional trend constraints as described in any one of claims 1 to 6.

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