Method, system and storage medium for synchronous simulation of river channel phase and physical properties

Abstract

The present invention discloses a method, system and storage medium for synchronous simulation of river channel phase and physical property, the method comprising: obtaining the width range and thickness range of the first-phase river channel sand body of a braided river reservoir; establishing the first-phase river channel phase model by the Fluvsim method according to the width range and thickness range of the first-phase river channel sand body, and obtaining the first-phase river channel sand-to-land ratio; controlling and simulating the first-phase river channel physical property model by the first-phase river channel phase model; obtaining the width range and thickness range of the next-phase river channel sand body in the same braided river reservoir, and establishing the next-phase river channel phase model on the basis of the previous river channel phase model by the Fluvsim method, until the total sand-to-land ratio of each phase of the river channel is greater than or equal to the preset river channel sand-to-land ratio, establishing the final river channel phase model and the final river channel physical property model. The present invention solves the problem that it is difficult to characterize the complex heterogeneity inside the river channel sand body and the extensive connectivity of the thick sand body when the multi-phase river channels of a braided river are cut and overlapped with each other.

Description

Technical Field

[0001] The invention relates to the field of oil reservoir description, and in particular to a method, system and storage medium for synchronous simulation of river phase and physical property. Background Art

[0002] Braided rivers are mostly developed in mountainous areas or upstream reaches of rivers and on alluvial fans. They are composed of multiple channels, multiple bifurcations and convergences. The thick sand layers of braided rivers are characterized by a high sand-to-land ratio. The channel sand bodies in the layers are distributed in pieces, and multiple periods of channel sand bodies are superimposed. They have strong heterogeneity and are a pseudo-pan-connected sand body as a whole. This poses a great challenge to the establishment of a braided river reservoir model. At the same time, the braided river reservoir can be divided into floodplains, channels and barbed interlayers based on different levels of structural units. Seepage barriers such as interlayers inside the barbed interlayer affect the heterogeneity and seepage capacity of the reservoir.

[0003] Therefore, the problem of difficulty in characterizing the complex heterogeneity of the channel sand bodies and the extensive connectivity of thick sand bodies caused by the mutual cutting and overlapping of multiple channels in braided rivers is an urgent problem to be solved in establishing a braided river channel model. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned background technology and provide a method, system and storage medium for synchronous simulation of river channel phases and physical properties, which solves the problem of difficulty in characterizing the complex heterogeneity inside the river channel sand body and the extensive connectivity of thick sand bodies caused by the mutual cutting and overlapping of multiple river channels in braided rivers.

[0005] In a first aspect, a method for synchronous simulation of river channel phases and physical properties is provided, comprising the following steps:

[0006] Obtain the width and thickness range of the first-stage channel sand bodies in braided river reservoirs;

[0007] According to the width range and thickness range of the first-stage channel sand body, the first-stage channel facies model is established by the Fluvsim method, and the first-stage channel sand-to-land ratio is obtained;

[0008] According to the first-phase river channel phase model, simulating the first-phase river channel physical property model by using the phase-controlled modeling method;

[0009] Under the same braided river reservoir deposition conditions, the width and thickness range of the next-stage channel sand body are obtained, and the next-stage channel phase model is established based on the previous channel phase model by the Fluvsim method, until the total sand-to-land ratio of each stage of the channel is greater than or equal to the preset channel sand-to-land ratio, and the final channel phase model is established;

[0010] At the same time, the next river channel physical property model is simulated on the basis of the previous river channel physical property model through the phase-controlled modeling method, and the final river channel physical property model is established according to the final river channel phase model.

[0011] According to the first aspect, in a first possible implementation of the first aspect, the step of "obtaining a first-stage channel facies model and obtaining a first-stage channel sand ratio by a Fluvsim method according to a width range and a thickness range of the first-stage channel sand body" includes the following steps:

[0012] Obtain modeling context for braided river mudstone facies;

[0013] According to the width range and thickness range of the first-stage river channel sand body, a quantitative data table of the first-stage river channel sand body is established by using a triangular distribution method;

[0014] Based on the modeling background of the braided river mudstone phase and the channel quantitative data table of the first-phase channel sand body, the first-phase channel phase model is obtained by the Fluvsim method;

[0015] According to the first-phase river channel facies model, the first-phase river channel sand-to-land ratio is obtained through the data function Histogram.

[0016] According to the first possible implementation manner of the first aspect, in the second possible implementation manner of the first aspect, 3. the step of “simulating the first-phase river channel physical property model by a phase-controlled modeling method according to the first-phase river channel phase model” comprises the following steps:

[0017] When the first-stage channel phase type is floodplain mud, the physical property value of the first-stage mudstone reservoir is given as a preset physical property value based on the first-stage channel phase model by a deterministic modeling method;

[0018] When the first-stage channel phase type is channel sand body, the first-stage channel physical property model is simulated based on the first-stage channel phase model by sequential Gaussian simulation method.

[0019] According to the first possible implementation manner of the first aspect, in the third possible implementation manner of the first aspect, after the step of 4, “simulating the next river channel physical property model based on the previous river channel physical property model by the phase-controlled modeling method, and establishing the final river channel physical property model according to the final river channel phase model”, the following steps are included:

[0020] According to the river channel phase model and the river channel physical property model of each period, the connected volume phase model and the connected volume physical property model of the river channel of each period are obtained respectively through the connected volumes method.

[0021] According to the first aspect, in a fourth possible implementation of the first aspect, the step of “obtaining a width range and a thickness range of a first-phase channel sand body of a braided river reservoir” comprises the following steps:

[0022] Based on the logging curve morphology of two well-connected sections of the first-stage channel of the braided river reservoir, the width range and thickness range of the sand body of the first-stage channel are obtained respectively.

[0023] In a second aspect, a system for simulating river channel phases and physical properties is provided, comprising:

[0024] The width and thickness acquisition module is used to obtain the width and thickness range of the first-stage channel sand body of the braided river reservoir;

[0025] A first-stage channel phase model acquisition module is in communication with the width and thickness acquisition module, and is used to establish a first-stage channel phase model and obtain the first-stage channel sand body ratio by a Fluvsim method according to the width range and thickness range of the first-stage channel sand body;

[0026] A first-phase river channel physical property model acquisition module, which is in communication connection with the first-phase river channel phase model acquisition module and is used to simulate the first-phase river channel physical property model through a phase-controlled modeling method according to the first-phase river channel phase model;

[0027] a final channel phase model acquisition module, which is in communication connection with the first-phase channel phase model acquisition module, and is used to obtain the width range and thickness range of the next-phase channel sand body under the same braided river reservoir deposition conditions, and establish the next-phase channel phase model based on the previous channel phase model by the Fluvsim method, until the total sand-to-land ratio of each phase of the channel is greater than or equal to the preset channel sand-to-land ratio, and then establish the final channel phase model; and,

[0028] The final river channel physical property model acquisition module is communicated with the first-phase river channel physical property model acquisition module and the final river channel phase model acquisition module, and is used to simulate the next-phase river channel physical property model based on the previous river channel physical property model through the phase-controlled modeling method, and establish the final river channel physical property model according to the final river channel phase model.

[0029] According to the second aspect, in a first possible implementation method of the second aspect, the first-phase channel phase model acquisition module is used to obtain the modeling background of the braided river mudstone phase, and according to the width range and thickness range of the first-phase channel sand body, a channel quantitative data table of the first-phase channel sand body is established through a triangular distribution method; based on the modeling background of the braided river mudstone phase and according to the channel quantitative data table of the first-phase channel sand body, a first-phase channel phase model is established through a Fluvsim method; according to the first-phase channel phase model, the first-phase channel sand-to-land ratio is obtained through a data function Histogram.

[0030] According to the second aspect, in a second possible implementation method of the second aspect, the first-stage river channel physical property model acquisition module is used to, when the first-stage river channel phase type is floodplain mud, give the first-stage river channel mudstone reservoir physical property value as a preset physical property value based on the first-stage river channel phase model through a deterministic modeling method; when the first-stage river channel phase type is river sand body, simulate the first-stage river channel physical property model based on the first-stage river channel phase model through a sequential Gaussian simulation method.

[0031] According to the second aspect, in a third possible implementation of the second aspect, a module for acquiring a connected volume model of each period of the river channel is communicatively connected to the module for acquiring a final river channel phase model and the module for acquiring a final river channel physical property model, and is used to respectively acquire a connected volume phase model and a connected volume physical property model of each period of the river channel through a connected volumes method based on the river channel phase model of each period and the river channel physical property model of each period.

[0032] According to a third aspect, a storage medium is provided, on which a computer program is stored, characterized in that when the computer program is executed by a processor, the above-mentioned method for synchronous simulation of river phases and physical properties is implemented.

[0033] Compared with the prior art, the present invention first obtains the width range and thickness range of the first-stage channel sand body of the braided river reservoir; then, based on the width range and thickness range of the first-stage channel sand body, a first-stage channel phase model is established by the Fluvsim method, and the first-stage channel sand-to-land ratio is obtained; then, based on the first-stage channel phase model, a first-stage channel physical property model is simulated by a phase-controlled modeling method, that is, the heterogeneity within a single-stage channel is characterized; after establishing the first-stage channel phase model and the first-stage channel attribute model, under the same braided river reservoir deposition conditions and on the basis of the first-stage channel model, the above steps are repeated to establish a second-stage channel phase model, and on the basis of the second-stage channel phase model, the above steps are repeated to establish a second-stage channel physical property model, thereby retaining the physical property heterogeneity of the previous secondary generated channel; similarly , under the same braided river reservoir deposition conditions, the width range and thickness range of the next channel sand body are obtained, and the next channel phase model is established on the basis of the previous channel phase model by the Fluvsim method, until the total sand-to-land ratio of each channel is greater than or equal to the preset channel sand-to-land ratio, and the final channel phase model is obtained; at the same time, the next channel physical property model is simulated on the basis of the previous channel physical property model by the phase-controlled modeling method, and the final channel physical property model is obtained according to the final channel phase model, at which time the establishment of the channel phase model and the channel physical property model is terminated. Therefore, no matter whether the later generated channel cuts and overlaps the previous channel, the physical property heterogeneity of the previous generated channel can be retained, and the problem of false extensive connectivity of thick sand bodies in the channel is also avoided, which is helpful to optimize the injection-production structure and improve the oil and gas recovery rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic flow chart of a method for synchronous simulation of river channel phase and physical properties provided by one embodiment of the present invention;

[0035] Figure 2 is a schematic diagram of a first-phase river channel phase model provided by another embodiment of the present invention;

[0036] Figure 3 is a statistical schematic diagram of the sand-to-land ratio of the first phase of the river provided by another embodiment of the present invention;

[0037] Figure 4 is a schematic diagram of a first-phase river channel physical property model provided by another embodiment of the present invention;

[0038] Figure 5 is a schematic diagram of a final river channel phase model provided by another embodiment of the present invention;

[0039] Figure 6 is a schematic diagram of a final river channel physical property model provided by another embodiment of the present invention;

[0040] Figure 7 is a schematic diagram of a first-phase river channel connection body phase model provided by another embodiment of the present invention;

[0041] Figure 8 is a schematic diagram of a physical property model of a first-phase river channel connection body provided by another embodiment of the present invention;

[0042] Fig. 9 is a schematic diagram of the logging curve morphology of two well-connected sections of the first-phase river channel provided by another embodiment of the present invention;

[0043] Fig.10 It is a structural schematic diagram of a river channel phase and physical property synchronous simulation system provided by one embodiment of the present invention. Description of the drawings:

[0045] 100. Channel phase and physical property synchronous simulation system; 110. Width and thickness acquisition module; 120. First-phase channel phase model acquisition module; 130. First-phase channel physical property model acquisition module; 140. Final channel phase model acquisition module; 150. Final channel physical property model acquisition module. DETAILED DESCRIPTION

[0046] 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.

[0047] 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.

[0048] 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.

[0049] See also Figure 1 As shown, an embodiment of the present invention provides a method for synchronous simulation of river channel phase and physical properties, comprising the following steps:

[0050] S100, obtain the width and thickness range of the first-stage channel sand body of the braided river reservoir;

[0051] S200, establishing a first-stage channel facies model by a Fluvsim method according to a width range and a thickness range of the first-stage channel sand body, and obtaining a first-stage channel sand-to-land ratio;

[0052] S300, simulating a first-phase river channel physical property model by a phase-controlled modeling method according to the first-phase river channel phase model;

[0053] S400, obtaining the width range and thickness range of the next-stage channel sand body under the same braided river reservoir deposition conditions, and establishing the next-stage channel phase model based on the previous channel phase model by the Fluvsim method, until the total sand-to-land ratio of each stage of the channel is greater than or equal to the preset channel sand-to-land ratio, and then establishing the final channel phase model;

[0054] S500, simulating the next river channel physical property model based on the previous river channel physical property model by a phase-controlled modeling method, and establishing a final river channel physical property model according to the final river channel phase model.

[0055] Specifically, in this embodiment, the width range and thickness range of the first-stage river channel sand body of the braided river reservoir are first obtained; then, according to the width range and thickness range of the first-stage river channel sand body, the first-stage river channel facies model is established by the Fluvsim method, and the reference Figure 2 As shown, the first phase of river channel sand-land ratio is obtained, referring to Figure 3 As shown; then, based on the first phase river channel phase model, the first phase river channel physical property model is simulated by the phase control modeling method. Figure 4 As shown, it characterizes the heterogeneity within a single-stage channel; after establishing the first-stage channel phase model and the first-stage channel phase model, the second-stage channel phase model is established by repeating the above steps under the same braided river reservoir depositional conditions and on the basis of the first-stage channel phase model, and the second-stage channel physical property model is established by repeating the above steps on the basis of the second-stage channel phase model, so that the physical property heterogeneity of the previous secondary channel can be retained; similarly, under the same braided river reservoir depositional conditions, the width range and thickness range of the next-stage channel sand body are obtained, and the next-stage channel phase model is established on the basis of the previous channel phase model by the Fluvsim method, until the total sand-to-land ratio of each stage channel is greater than or equal to the preset channel sand-to-land ratio, the final channel phase model is obtained, see Figure 5 As shown; at the same time, the next river channel physical property model is simulated based on the previous river channel physical property model through the phase control modeling method, and the final river channel physical property model is established according to the final river channel phase model, see Figure 6 As shown in the figure, the channel phase model and channel physical property model are terminated at this time. Therefore, no matter whether the later generated channel cuts and overlaps the previous channel, the physical property heterogeneity of the previous channel can be retained. At the same time, the problem of false extensive connectivity of thick sand bodies in the channel is also avoided, which helps to optimize the injection-production structure and improve the oil and gas recovery rate.

[0056] At the same time, the preset river channel sand-land ratio is set to 90%, starting from the first river channel, the total sand-land ratio of each river channel after accumulation is greater than or equal to the preset river channel sand-land ratio of 90%, such as the total sand-land ratio is 91%, that is, the final river channel sand-land ratio is 91%. The simulation of the next river channel phase and physical property model will no longer be continued.

[0057] It should be noted that the Fluvsim method is based on the target simulation method, is a river phase modeling software algorithm, and is an existing general modeling method.

[0058] It should be noted that each channel was modeled under the same braided river reservoir sedimentary conditions (sedimentary environment and sedimentary background) to avoid differences in reservoir sedimentation in the studied channel that would affect the modeling results.

[0059] Preferably, in another embodiment of the present application, the step of "S200, establishing a first-stage channel facies model by a Fluvsim method according to the width range and thickness range of the first-stage channel sand body, and obtaining the first-stage channel sand-to-land ratio" comprises the following steps:

[0060] S210, obtaining the modeling background of braided river mudstone facies;

[0061] S220, establishing a channel quantitative data table of the first-stage channel sand body by a triangular distribution method according to the width range and thickness range of the first-stage channel sand body;

[0062] S230, based on the modeling background of the braided river mudstone phase and the channel quantitative data table of the first-phase channel sand body, obtain the first-phase channel phase model by Fluvsim method;

[0063] S240, obtaining the first-phase river channel sand-to-land ratio through a data function Histogram according to the first-phase river channel facies model.

[0064] Specifically, in this embodiment, the width range of the first-stage river channel sand body is 900-1200m, the thickness range of the first-stage river channel sand body is 10-15m, and the river channel quantitative data table of the first-stage river channel sand body is established by the triangular distribution method, as shown in Table 1, that is, the width range of the first-stage river channel sand body is set to obey the triangular distribution, with a minimum value of 900m, a mode value of 1000m, and a maximum value of 1200m, and the thickness also obeys the triangular distribution, with a minimum value of 10m, a mode value of 12m, and a maximum value of 15m; According to the river channel quantitative data table of the first-stage river channel sand body, the first-stage river channel phase model is established by the Fluvsim method, see Figure 2 As shown in the figure, in the field of geology, the Fluvsim method simulates the phase model in the petrel modeling software by setting some parameters such as the width, thickness, curvature, and amplitude of the river channel, thereby directly generating the first-phase river channel phase model according to the above Table 1. In the first-phase river channel phase model, the thickness of the river channel sand body comes from the underground well data (the shape of the logging curve of the two well sections), and then the first-phase river channel sand-to-ground ratio is obtained through the data function Histogram, see Figure 3 As shown, the sand-land ratio of the first phase river channel is 24.9%, and the mud of the floodplain accounts for 75.1%.

[0065]

[0066] Table (I)

[0067] Preferably, in another embodiment of the present application, the step of "S300, simulating the first-phase river channel physical property model by a phase-controlled modeling method according to the first-phase river channel phase model" comprises the following steps:

[0068] S310, when the first-stage river channel phase type is floodplain mud, using a deterministic modeling method, giving the first-stage river channel mudstone reservoir physical property values ​​as preset physical property values ​​based on the first-stage river channel phase model;

[0069] S320, when the first-stage channel phase type is channel sand body, simulating the first-stage channel physical property model based on the first-stage channel phase model by sequential Gaussian simulation method.

[0070] Specifically, in this embodiment, since the channel phase types are divided into floodplain mud and sand body, it is necessary to constrain the phase-controlled modeling technology, and different methods are used to simulate the physical property model for different phase types in the braided channel; that is, when the first-stage channel phase type is floodplain mud, the physical property value of the first-stage mudstone reservoir is given as a preset physical property value through the deterministic modeling method, and the preset physical property value is 0; when the first-stage channel phase type is channel sand body, the sequential Gaussian simulation method is used to simulate the first-stage channel physical property model, and the reference Figure 4 The above modeling strategy can effectively characterize the complex heterogeneity of the first-stage river channel.

[0071] Preferably, in another embodiment of the present application, after the step of "S500, simulating the next river channel physical property model based on the previous river channel physical property model by a phase-controlled modeling method, and establishing a final river channel physical property model according to the final river channel phase model", the following steps are included:

[0072] According to the river channel phase model and the river channel physical property model of each period, the connected volume phase model and the connected volume physical property model of the river channel of each period are obtained respectively through the connected volumes method.

[0073] Specifically, in this embodiment, in order to obtain the connected volume of a certain period of the river phase model, if the total number of periods of the final river phase model is ten, when the connected volume of the first period of the river phase model is to be studied and analyzed, the ten-period river phase model is first imported into the petrel modeling software, and then the first period of the river phase connected volume model is established by the connected volumes method, see Figure 7 As shown, the left side corresponds to Figure 2 The first phase river channel model, the right side is the corresponding Figure 4 The first-phase river channel of the ten-phase phase model is cut and filled by other later-generated river channels, and a small part of the first-phase river channel connection phase model is retained; therefore, the first-phase river channel is cut and filled by the later-generated river channel, but its original heterogeneity is preserved, which is in line with the laws and understanding of underground geology, and its connection result is no longer a large pan-connected body as believed by the prior art. Similarly, see Figure 8 As shown, in order to obtain the connected body of a river channel physical property model of a certain period, that is, the river channel connected body physical property model, the above method can also be used for simulation.

[0074] Preferably, in another embodiment of the present application, the step of “S100, obtaining the width range and thickness range of the first-phase channel sand body of the braided river reservoir” comprises the following steps:

[0075] Based on the logging curve morphology of two well-connected sections of the first-stage channel of the braided river reservoir, the width range and thickness range of the sand body of the first-stage channel are obtained respectively.

[0076] Specifically, in this embodiment, see Fig. 9 As shown in the figure, the profiles of two typical wells Well 1 and Well 2 in the river channel are established. Fig. 9 Four channel sand bodies are demarcated between Well 1 and Well 2. The GR (natural gamma) logging curve of the channel sand body is smooth or toothed bell-shaped, and the GR logging curve of the floodplain mud is characterized by a higher GR value with a curve return. Therefore, there is a rightward mutation between the channel sand body and the floodplain mud, indicating the contact position between the channel sand body and the floodplain mud of the Bian River. The top and bottom positions of each channel sand body are determined by whether the logging curve morphology returns or mutates, and the elevation difference between the bottom depth and the top depth of the sand body is the thickness range of the channel sand body. At the same time, the width range of the channel sand body can also be obtained by lateral measurement of the two-dimensional profile.

[0077] See also Fig.10 As shown, the present invention also provides a channel phase and physical property synchronous simulation system 100, including a width and thickness acquisition module 110, a first-stage channel phase model acquisition module 120, a first-stage channel physical property model acquisition module 130, a final channel phase model acquisition module 140, a final channel physical property model acquisition module 150 and a channel connectivity model acquisition module 160 for each stage;

[0078] The width and thickness acquisition module 110 is used to obtain the width range and thickness range of the first-stage channel sand body of the braided river reservoir;

[0079] A first-stage channel phase model acquisition module 120 is in communication connection with the width and thickness acquisition module 110, and is used to establish a first-stage channel phase model by a Fluvsim method according to the width range and thickness range of the first-stage channel sand body, and to obtain the first-stage channel sand-to-land ratio;

[0080] A first-stage river channel physical property model acquisition module 130 is in communication with the first-stage river channel phase model acquisition module 120 and is used to simulate the first-stage river channel physical property model through a phase-controlled modeling method according to the first-stage river channel phase model;

[0081] The final channel phase model acquisition module 140 is in communication connection with the first-phase channel phase model acquisition module 120, and is used to obtain the width range and thickness range of the next-phase channel sand body under the same braided river reservoir deposition conditions, and establish the next-phase channel phase model based on the previous channel phase model by the Fluvsim method, until the total sand-to-land ratio of each phase of the channel is greater than or equal to the preset channel sand-to-land ratio, and then establish the final channel phase model;

[0082] The final channel physical property model acquisition module 150 is communicated with the first channel physical property model acquisition module 130 and the final channel phase model acquisition module 140, and is used to simulate the next channel physical property model based on the previous channel physical property model through the phase-controlled modeling method, and establish the final channel physical property model according to the final channel phase model.

[0083] The channel connected volume model acquisition module 160 is in communication with the final channel phase model acquisition module 140 and the final channel physical property model acquisition module 150, and is used to obtain the connected volume phase model and the connected volume physical property model of the channel of each period through the connected volumes method according to the channel phase model and the channel physical property model of each period.

[0084] The first-phase channel phase model acquisition module 120 is used to obtain the modeling background of the braided river mudstone phase, and establish a channel quantitative data table of the first-phase channel sand body through a triangular distribution method according to the width range and thickness range of the first-phase channel sand body. Based on the modeling background of the braided river mudstone phase and the channel quantitative data table of the first-phase channel sand body, a first-phase channel phase model is established through a Fluvsim method. According to the first-phase channel phase model, the first-phase channel sand-to-land ratio is obtained through a data function Histogram.

[0085] The first-stage channel physical property model acquisition module 130 is used to, when the first-stage channel phase type is floodplain mud, give the first-stage mudstone reservoir physical property value as a preset physical property value based on the first-stage channel phase model through a deterministic modeling method; when the first-stage channel phase type is sand body, simulate the first-stage channel physical property model based on the first-stage channel phase model through a sequential Gaussian simulation method.

[0086] The channel phase and physical property synchronous simulation system first obtains the width range and thickness range of the first-stage channel sand body of the braided river reservoir; then, based on the width range and thickness range of the first-stage channel sand body, the first-stage channel phase model is obtained by the Fluvsim method, and the first-stage channel sand-to-land ratio is obtained; then, based on the first-stage channel phase model, the first-stage channel physical property model is simulated by the phase-controlled modeling method, that is, the heterogeneity in the single-stage channel is characterized; after establishing the first-stage channel phase model and the first-stage channel phase model, the second-stage channel phase model is established on the basis of the first-stage channel phase model under the same braided river reservoir deposition conditions, and the second-stage channel physical property model is established by repeating the above steps on the basis of the second-stage channel phase model, thereby retaining the physical property heterogeneity of the previous secondary generated channel; Similarly, under the same braided river reservoir deposition conditions, the width range and thickness range of the next-stage channel sand body are obtained, and the next-stage channel phase model is established on the basis of the previous channel phase model by the Fluvsim method, until the total sand-to-land ratio of each stage of the channel is greater than or equal to the preset channel sand-to-land ratio, and the final channel phase model is obtained; at the same time, the next-stage channel physical property model is simulated on the basis of the previous channel physical property model by the phase-controlled modeling method, and the final channel physical property model is simulated according to the final channel phase model, at which point the establishment of the channel phase model and the channel physical property model is terminated. Therefore, regardless of whether the later-generated channel cuts and overlaps the previous channel, the physical property heterogeneity of the previous-generated channel can be retained, and the problem of false extensive connectivity of thick-layer sand bodies in the channel is also avoided, which is helpful to optimize the injection-production structure and improve the oil and gas recovery rate. At the same time, in order to obtain the connected body of a certain period of river channel phase model, if the total number of periods of the final river channel phase model is ten, when you want to study and analyze the connected body of the first period of river channel phase model, you can first import the ten-period river channel phase model into the petrel modeling software, and then establish the first period of river channel connected body model through the connected volumes method. Therefore, any period of river channel is cut and filled by the later generated river channel, but its original heterogeneity is preserved, which is in line with the laws and understanding of underground geology, and its connected body result is no longer the existing technology that all rivers are considered to be a large pan-connected body.

[0087] 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.

[0088] 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.

[0089] The present invention implements all or part of the process 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 capable of carrying 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, Random Access 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.

[0090] 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.

[0091] 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.

[0092] 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 at least one application required for a 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 (Smart Media 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.

[0093] It will be appreciated by those skilled in the art that 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 codes.

[0094] 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 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.

[0095] 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.

[0096] 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.

[0097] 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 method for synchronous simulation of river channel phase and physical properties, characterized in that: The following steps are involved: Obtain the width and thickness range of the first-stage channel sand bodies in braided river reservoirs; According to the width range and thickness range of the first-stage channel sand body, the first-stage channel facies model is established by the Fluvsim method, and the first-stage channel sand-to-land ratio is obtained; According to the first-phase river channel phase model, simulating the first-phase river channel physical property model by using the phase-controlled modeling method; Under the same braided river reservoir deposition conditions, the width and thickness range of the next-stage channel sand body are obtained, and the next-stage channel phase model is established based on the previous channel phase model by the Fluvsim method, until the total sand-to-land ratio of each stage of the channel is greater than or equal to the preset channel sand-to-land ratio, and the final channel phase model is established; At the same time, the next river channel physical property model is simulated on the basis of the previous river channel physical property model through the phase-controlled modeling method, and the final river channel physical property model is established according to the final river channel phase model.

2. The method for synchronous simulation of river channel phase and physical properties according to claim 1, characterized in that: The step of "establishing a first-phase channel facies model by the Fluvsim method according to the width range and thickness range of the first-phase channel sand body, and obtaining the first-phase channel sand-to-land ratio" includes the following steps: Obtain modeling context for braided river mudstone facies; According to the width range and thickness range of the first-stage river channel sand body, a quantitative data table of the first-stage river channel sand body is established by using a triangular distribution method; Based on the modeling background of the braided river mudstone phase and the quantitative data table of the river channel of the first phase river channel sand body, the first phase river channel phase model is established by Fluvsim method; According to the first-phase river channel facies model, the first-phase river channel sand-to-land ratio is obtained through the data function Histogram.

3. The method for synchronous simulation of river channel phase and physical properties according to claim 1, characterized in that: The step of "simulating the first-phase river channel physical property model by a phase-controlled modeling method according to the first-phase river channel phase model" includes the following steps: When the first-stage channel phase type is floodplain mud, the physical property value of the first-stage mudstone reservoir is given as a preset physical property value based on the first-stage channel phase model by a deterministic modeling method; When the first-stage channel phase type is channel sand body, the first-stage channel physical property model is simulated based on the first-stage channel phase model by sequential Gaussian simulation method.

4. The method for synchronous simulation of river channel phase and physical properties according to claim 1, characterized in that: After the step of "simultaneously simulating the next river channel physical property model based on the previous river channel physical property model by the phase-controlled modeling method, and establishing the final river channel physical property model according to the final river channel phase model", the following steps are included: According to the river channel phase model and the river channel physical property model of each period, the connected volume phase model and the connected volume physical property model of the river channel of each period are obtained respectively through the connected volumes method.

5. The method for synchronous simulation of river channel phase and physical properties according to claim 1, characterized in that: The step of "obtaining the width range and thickness range of the first-phase channel sand body of the braided river reservoir" comprises the following steps: Based on the logging curve morphology of two well-connected sections of the first-stage channel of the braided river reservoir, the width range and thickness range of the sand body of the first-stage channel are obtained respectively.

6. A system for simulating river channel phases and physical properties simultaneously, characterized in that: include: The width and thickness acquisition module is used to obtain the width and thickness range of the first-stage channel sand body of the braided river reservoir; A first-stage channel phase model acquisition module is in communication with the width and thickness acquisition module, and is used to establish a first-stage channel phase model and obtain the first-stage channel sand body ratio by a Fluvsim method according to the width range and thickness range of the first-stage channel sand body; A first-phase river channel physical property model acquisition module, which is in communication connection with the first-phase river channel phase model acquisition module and is used to simulate the first-phase river channel physical property model through a phase-controlled modeling method according to the first-phase river channel phase model; The final channel phase model acquisition module is connected to the first-stage channel phase model acquisition module in communication, and is used to obtain the width range and thickness range of the next-stage channel sand body under the same braided river reservoir deposition conditions, and establish the next-stage channel phase model based on the previous channel phase model by the Fluvsim method, until the total sand-to-land ratio of each stage of the channel is greater than or equal to the preset channel sand-to-land ratio, and then establish the final channel phase model; as well as, The final river channel physical property model acquisition module is communicated with the first-phase river channel physical property model acquisition module and the final river channel phase model acquisition module, and is used to simulate the next-phase river channel physical property model based on the previous river channel physical property model through the phase-controlled modeling method, and establish the final river channel physical property model according to the final river channel phase model.

7. The system for synchronous simulation of river channel phase and physical properties according to claim 6, characterized in that: The first-phase channel phase model acquisition module is used to obtain the modeling background of the braided river mudstone phase, and establish the channel quantitative data table of the first-phase channel sand body through the triangular distribution method according to the width range and thickness range of the first-phase channel sand body. Based on the modeling background of the braided river mudstone phase and the channel quantitative data table of the first-phase channel sand body, the first-phase channel phase model is established through the Fluvsim method; according to the first-phase channel phase model, the first-phase channel sand-to-land ratio is obtained through the data function Histogram.

8. The system for synchronous simulation of river channel phase and physical properties according to claim 6, characterized in that: The first-stage channel physical property model acquisition module is used to, when the first-stage channel phase type is floodplain mud, give the first-stage mudstone reservoir physical property value as a preset physical property value based on the first-stage channel phase model through a deterministic modeling method; when the first-stage channel phase type is channel sand body, simulate the first-stage channel physical property model based on the first-stage channel phase model through a sequential Gaussian simulation method.

9. The system for synchronous simulation of river channel phase and physical properties according to claim 6, characterized in that: Also includes: The module for acquiring the connected volume model of each period of the river channel is communicated with the module for acquiring the final river channel phase model and the module for acquiring the final river channel physical property model, and is used to respectively acquire the connected volume phase model and the connected volume physical property model of each period of the river channel through the connectedvolumes method according to the river channel phase model of each period and the river channel physical property model of each period.

10. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for synchronous simulation of river channel phases and physical properties as described in any one of claims 1 to 5 is implemented.

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