Oil reservoir geologic modeling method and device for representing reservoir time-varying characteristics, equipment and medium

Abstract

The invention discloses an oil reservoir geologic modeling method and device for representing reservoir time-varying characteristics, equipment and a medium. The method comprises the following steps: establishing an oil reservoir static geologic model when an oil reservoir is not put into production and development; the method comprises the following steps of: analyzing dynamic change rules of different types of reservoir core samples in a displacement process by taking a laboratory testing technology as a means and taking actual parameters of a development oil field as a basis, and determining a reservoir physical property parameter time-varying prediction model; establishing an oil reservoir dynamic parameter model; and on the basis of the oil reservoir static geologic model, introducing a reservoir physical property parameter time-varying prediction model and an oil reservoir dynamic parameter model as constraint conditions, and establishing an oil reservoir geologic model representing reservoir time-varying characteristics. Therefore, quantitative characterization of the continuous change characteristics of the reservoir in the oilfield development process can be achieved, and the method can be widely applied to oil-gas field development.

Description

Technical Field

[0001] The present invention relates to a reservoir geological modeling method, device, equipment and medium for characterizing the time-varying characteristics of a reservoir, and relates to the technical field of oil and gas field development. Background Art

[0002] During offshore oilfield development with large well spacing and intensive injection and recovery, reservoir parameters such as mineral composition, micropore structure, physical properties, and heterogeneity change dynamically across the different development stages (early, mid, and late). Establishing a time-varying model that reflects the dynamic changes in reservoir parameters is of great geological significance for understanding reservoir geology and predicting the distribution of remaining oil in the mid- to late stages of oilfield development.

[0003] Currently, reservoir geological modeling primarily involves a three-dimensional quantitative characterization of various reservoir attribute parameters and their spatial distribution from a static perspective. However, reservoir physical properties and heterogeneity undergo continuous dynamic changes during oilfield development, necessitating the introduction of a time variable to establish a geological model that characterizes the time-varying characteristics of the reservoir. Considering the continuity of the time variable in modeling and characterizing the characteristics of different reservoir types at different times and with varying degrees of change places higher demands on geological modeling.

[0004] Existing conventional 4D geological modeling typically uses the basic and infill well patterns of different development stages as control conditions. Using stochastic simulation techniques, 3D reservoir models are constructed for each well pattern at corresponding time points in order to characterize reservoir dynamics. However, this approach fails to fully consider production performance data and the degree to which reservoir structure and physical properties vary over time during different development stages. Consequently, the model fails to objectively and truly reflect reservoir dynamics, and thus cannot effectively guide offshore oilfield development and production. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To address this problem, the present invention provides a reservoir geological modeling method, apparatus, equipment, and medium for quantitatively characterizing the continuous changes in reservoir characteristics during oilfield development.

[0006] In order to achieve the above-mentioned purpose of the invention, the technical solution provided by the present invention is:

[0007] In a first aspect, the present invention provides a reservoir geological modeling method for characterizing time-varying reservoir characteristics, comprising:

[0008] Establish a static geological model of the reservoir before it is put into production;

[0009] Using laboratory testing technology as a means and actual parameters of developed oil fields as a basis, the dynamic change patterns of core samples of different types of reservoirs during the displacement process are analyzed to determine the time-varying prediction model of reservoir physical property parameters;

[0010] Establish reservoir dynamic parameter model;

[0011] On the basis of the static geological model of the reservoir, the time-varying prediction model of reservoir physical property parameters and the reservoir dynamic parameter model are introduced as constraints to establish a reservoir geological model that characterizes the time-varying characteristics of the reservoir.

[0012] In some possible implementations, the static geological model of the reservoir includes porosity, permeability, net-to-gross ratio, grain size distribution, saturation and / or shale content.

[0013] In some possible implementations, the functional relationship of the time-varying prediction model for reservoir physical property parameters is as follows:

[0014] Z=0.8736+0.1973×X-0.375×Y-0.02477×X 2 +0.1362×X×Y-

[0015] 0.2322×Y 2 +0.001274×X 3 -0.007683×X 2 ×Y+0.02573×X×Y 2 -0.03988×Y 3

[0016] Where X is the logarithm of the cumulative flux, ln(M), and M is the cumulative flux in m. 3 / m 2 ; Y is the logarithm of instantaneous flux, ln(M v ), M v is the instantaneous flux, in m 3 / m 2 ; Z is the multiple of reservoir property change.

[0017] In some possible implementations, a reservoir dynamic parameter model is established by, specifically, using grid sampling, numerical model iteration, or conditional constraint control to construct a dynamic numerical model that matches the spatiotemporal attribute model grid.

[0018] In some possible implementations, the reservoir dynamic parameter model includes a water overflow ratio model and a displacement intensity model.

[0019] In some possible implementations, a reservoir geological model is established to characterize the time-varying characteristics of the reservoir. Specifically, based on the static geological model of the reservoir, a time-varying prediction model of reservoir physical property parameters and a reservoir dynamic parameter model at a certain moment in the oilfield development process are introduced. Through inter-model operations, the above functional relationship is substituted into a three-dimensional model calculator to establish a reservoir time-varying geological model corresponding to the moment of the reservoir dynamic parameter model.

[0020] In a second aspect, the present invention further provides a reservoir geological modeling device for characterizing time-varying reservoir characteristics, comprising:

[0021] The first unit is configured to establish a static geological model of the reservoir before the reservoir is put into production;

[0022] The second unit is configured to use laboratory testing technology as a means and the actual parameters of the developed oil field as a basis to analyze the dynamic changes of core samples of different types of reservoirs during the displacement process and determine the time-varying prediction model of reservoir physical property parameters;

[0023] a third unit configured to establish a reservoir dynamic parameter model;

[0024] The fourth unit is configured to introduce the time-varying prediction model of reservoir physical property parameters and the reservoir dynamic parameter model as constraints on the basis of the static geological model of the reservoir to establish a reservoir geological model that characterizes the time-varying characteristics of the reservoir.

[0025] In a third aspect, the present invention also provides an electronic device comprising: at least one processor; and a memory communicatively connected to the processor; wherein the memory stores instructions executable by the processor, and the instructions are executed by the processor to enable the processor to execute the described method.

[0026] In a fourth aspect, the present invention further provides a computer-readable storage medium storing one or more programs, wherein the one or more programs include computer instructions, and the computer instructions are used to enable a computer to execute the method described.

[0027] Due to the adoption of the above technical solution, the present invention has the following characteristics: the reservoir geological modeling proposed by the present invention, which characterizes the time-varying characteristics of the reservoir at any moment (time point) during the development of offshore water injection (polymerization) oil fields, has a modeling method that is simple to operate and has reliable results, and can solve two core problems: 1) production dynamic data is fully utilized as a constraint condition during the modeling process, and the reliability of the model can be verified; 2) it can achieve quantitative characterization of the continuous change characteristics of the reservoir during the development of the oil field; in summary, the present invention can be widely used in oil and gas field development. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. Throughout the drawings, the same reference numerals are used to denote the same components. In the drawings:

[0029] Figure 1 This is a technical roadmap of a reservoir geological modeling method for characterizing time-varying reservoir characteristics according to an embodiment of the present invention.

[0030] Figure 2 Schematic diagram of a time-varying prediction model for reservoir physical property parameters in an embodiment of the present invention;

[0031] Figure 3 Schematic diagram of a reservoir dynamic parameter model (displacement intensity and water flow ratio) at a certain moment in the oil field development process in an embodiment of the present invention;

[0032] Figure 4 Schematic diagram of the time-varying geological model of oil reservoirs at different development stages in an embodiment of the present invention. DETAILED DESCRIPTION

[0033] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0034] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0035] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inner side," "outer side," "lower," "upper," etc. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

[0036] In response to the problem of characterizing the dynamic changes of reservoirs during the development process, the present invention provides a reservoir geological modeling method, device, equipment and medium for characterizing the time-varying characteristics of reservoirs, including: establishing a static reservoir geological model when the reservoir is not put into production; using laboratory testing technology as a means and the actual parameters of the developed oil field as a basis, analyzing the dynamic change laws of different types of reservoir core samples during the displacement process to determine the time-varying prediction model of reservoir physical property parameters; establishing a reservoir dynamic parameter model; based on the static reservoir geological model, introducing the reservoir physical property parameter time-varying prediction model and the reservoir dynamic parameter model as constraints to establish a reservoir geological model that characterizes the time-varying characteristics of the reservoir. Therefore, in the process of modeling the reservoir time-varying geological model, the present invention uses the reservoir type as a conditional constraint, introduces the reservoir physical property parameter time-varying prediction model and the reservoir dynamic parameter model as trend constraints, and realizes the rapid and accurate establishment of a reservoir geological model that can characterize the time-varying characteristics of the reservoir, with strong operability.

[0037] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0038] Example 1: Figure 1 As shown, the reservoir geological modeling method for characterizing the time-varying characteristics of a reservoir provided in this embodiment includes:

[0039] S1. Establish a static geological model of the reservoir before it is put into development.

[0040] In this embodiment, the static geological model of the reservoir includes static models of parameters such as porosity, permeability, net-to-gross ratio, particle size distribution, saturation, and mud content. The modeling process of the above-mentioned static models of various parameters is consistent with the conventional reservoir geological modeling process. The modeling techniques used include existing deterministic modeling and stochastic modeling. By combining logging information with seismic information and applying sedimentary phase-controlled constraint modeling technology, the characterization of different phase belt types and zoning is achieved.

[0041] S2. Using laboratory testing technology as a means and based on the actual parameters of offshore water injection (polymerization) development oil fields, analyze the dynamic changes in physical properties, micropore structure and heterogeneity of core samples of different types of reservoirs during the displacement process, and determine the time-varying prediction model of reservoir physical property parameters. Among them, the time-varying prediction model of reservoir physical property parameters can be represented by a time-varying parameter relationship chart and a time-varying parameter distribution trend.

[0042] In this embodiment, the actual parameters of the offshore water injection (polymerization) development oil field mainly include the injection rate of the injection well, the production rate of the production well, the thickness of the sand body, the permeability, the porosity and other parameters.

[0043] In this embodiment, the specific process of determining the time-varying prediction model of different types of reservoir physical property parameters using laboratory technology is as follows:

[0044] like Figure 2 The time-varying prediction model for reservoir physical parameters shown is a time-varying parameter relationship chart. Using one-dimensional cores, multiple sets of physical simulation displacement experiments under different conditions were conducted to obtain the relationship between the change multiple of reservoir physical properties (porosity, permeability, etc.) and the displacement multiple (cumulative flux) and displacement intensity (instantaneous flux). A time-varying prediction model for reservoir physical parameters was established, which uses the distribution trend of time-varying parameters to represent the relationship. The functional relationship is as follows:

[0045] Z=0.8736+0.1973×X-0.375×Y-0.02477×X 2 +0.1362×X×Y-

[0046] 0.2322×Y 2 +0.001274×X 3 -0.007683×X 2 ×Y+0.02573×X×Y 2 -0.03988×Y 3

[0047] Where X is the logarithm of the cumulative flux, ln(M), and M is the cumulative flux in m. 3 / m 2 ; Y is the logarithm of instantaneous flux, ln(M v ), M v is the instantaneous flux, in m 3 / m 2 ; Z is the multiple of reservoir property change, and the fitting coefficient R 2 =0.93624.

[0048] S3. Establish a reservoir dynamic parameter model.

[0049] In this embodiment, existing methods can be used to establish a reservoir dynamic parameter model, including: using grid sampling, numerical model iteration, conditional constraint control, etc. to construct a dynamic numerical model that matches the spatiotemporal attribute model grid, including a water flow multiple model and a displacement intensity model.

[0050] S4. Establish a reservoir geological model that characterizes the time-varying characteristics of the reservoir.

[0051] In this embodiment, a reservoir geological model is established to characterize the time-varying characteristics of the reservoir, including a time-varying reservoir geological model of porosity, permeability, saturation, etc. Based on the static reservoir geological model classified by type and region in step S1, the reservoir physical property time-varying parameter prediction model in step S2 and the reservoir dynamic parameter model in step S3 are introduced as constraints to establish a reservoir time-varying geological model corresponding to the reservoir dynamic parameter model at a certain moment, that is, a reservoir geological model that characterizes the time-varying characteristics of the reservoir.

[0052] like Figure 3 As shown in Figure 1, the reservoir dynamic parameter model at a certain moment in the oilfield development process is usually obtained by directly importing the numerical model, grid sampling, conditional constraint control, etc.

[0053] like Figure 4 As shown, the reservoir geological model that characterizes the time-varying characteristics of the reservoir is shown. Based on the static geological model of the S1 reservoir, the Figure 2 and Figure 3 , through inter-model operations, the above functional relationship is substituted into the three-dimensional model calculator to establish Figure 3 Time-varying geological model of the reservoir corresponding to the time.

[0054] Example 2: The above-mentioned Example 1 provides a reservoir geological modeling method for characterizing the time-varying characteristics of a reservoir. Correspondingly, this embodiment provides a reservoir geological modeling device for characterizing the time-varying characteristics of a reservoir. The device provided in this embodiment can implement the reservoir geological modeling method for characterizing the time-varying characteristics of a reservoir in Example 1. The device can be implemented through software, hardware, or a combination of software and hardware. For ease of description, this embodiment is described separately by functionally dividing it into various units. Of course, during implementation, the functions of each unit can be implemented in the same or multiple software and / or hardware. For example, the device can include integrated or separate functional modules or functional units to perform the corresponding steps in each method of Example 1. Since the device of this embodiment is basically similar to the method embodiment, the description process of this embodiment is relatively simple. For relevant details, please refer to the partial description of Example 1. The embodiment of the device for reservoir geological modeling for characterizing the time-varying characteristics of a reservoir provided by the present invention is merely illustrative.

[0055] Specifically, the reservoir geological modeling device for characterizing the time-varying characteristics of a reservoir provided by the present invention includes:

[0056] The first unit is configured to establish a static geological model of the reservoir before the reservoir is put into production;

[0057] The second unit is configured to use laboratory testing technology as a means and the actual parameters of the developed oil field as a basis to analyze the dynamic changes of core samples of different types of reservoirs during the displacement process and determine the time-varying prediction model of reservoir physical property parameters;

[0058] a third unit configured to establish a reservoir dynamic parameter model;

[0059] The fourth unit is configured to introduce the time-varying prediction model of reservoir physical property parameters and the reservoir dynamic parameter model as constraints on the basis of the static geological model of the reservoir to establish a reservoir geological model that characterizes the time-varying characteristics of the reservoir.

[0060] Example 3: This example provides an electronic device corresponding to the reservoir geological modeling method for characterizing the time-varying characteristics of the reservoir provided in Example 1. The electronic device can be an electronic device used for a client, such as a mobile phone, a laptop computer, a tablet computer, a desktop computer, etc., to execute the method of Example 1.

[0061] The electronic device includes a processor, a memory, a communication interface, and a bus. The processor, memory, and communication interface are connected via the bus to facilitate communication between them. The memory stores a computer program executable on the processor. When the processor executes the computer program, it performs the method of Example 1. The implementation principles and technical effects are similar to those of Example 1 and are not further described here.

[0062] In a preferred embodiment, the logic instructions in the above-mentioned memory can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), optical disk and other media that can store program code.

[0063] In a preferred embodiment, the processor may be a central processing unit (CPU), a digital signal processor (DSP), or other general-purpose processors of various types, which are not limited herein.

[0064] Embodiment 4: This embodiment provides a computer-readable storage medium storing one or more programs, wherein the one or more programs include computer instructions. When the computer instructions are executed by a computer, the computer executes the method provided in the above embodiment 1.

[0065] In a preferred embodiment, a computer-readable storage medium may be a tangible device that retains and stores instructions executed by the computer, such as, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any combination thereof. The computer-readable storage medium stores computer program instructions that cause a computer to execute the method provided in the first embodiment.

[0066] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (apparatus), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes 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 steps in the process. 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.

[0067] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work 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 The function specified in one or more boxes.

[0068] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 The steps for the function specified in one or more boxes.

[0069] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In the description of this specification, the reference terms "a preferred embodiment", "further", "specifically", "in the present embodiment", etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of this specification. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A reservoir geological modeling method for characterizing the time-varying characteristics of a reservoir, characterized in that: include: Establish a static geological model of the reservoir before it is put into production; Using laboratory testing technology as a means and actual parameters of developed oil fields as a basis, the dynamic change patterns of core samples of different types of reservoirs during the displacement process are analyzed to determine the time-varying prediction model of reservoir physical property parameters; Establish reservoir dynamic parameter model; On the basis of the static geological model of the reservoir, the time-varying prediction model of reservoir physical property parameters and the reservoir dynamic parameter model are introduced as constraints to establish a reservoir geological model that characterizes the time-varying characteristics of the reservoir.

2. The reservoir geological modeling method for characterizing the time-varying characteristics of a reservoir according to claim 1, characterized in that: The static geological model of the reservoir includes porosity, permeability, net-to-gross ratio, grain size distribution, saturation and / or mud content.

3. The reservoir geological modeling method for characterizing the time-varying characteristics of a reservoir according to claim 1, characterized in that: The functional relationship of the time-varying prediction model of reservoir physical property parameters is: Z=0.8736+0.1973×X-0.375×Y-0.02477×X 2 +0.1362×X×Y- 0.2322×Y 2 +0.001274×X 3 -0.007683×X 2 ×Y+0.02573×X×Y 2 -0.03988×Y 3 Where X is the logarithm of the cumulative flux, ln(M), and M is the cumulative flux in m. 3 / m 2 ; Y is the logarithm of instantaneous flux, ln(M v ), M v is the instantaneous flux, in m 3 / m 2 ; Z is the multiple of reservoir property change.

4. The reservoir geological modeling method for characterizing the time-varying characteristics of a reservoir according to claim 3, characterized in that: Establish a reservoir dynamic parameter model, specifically: use grid sampling, numerical model iteration or conditional constraint control to build a dynamic numerical model that matches the spatiotemporal attribute model grid.

5. The reservoir geological modeling method for characterizing the time-varying characteristics of a reservoir according to claim 4, characterized in that: The reservoir dynamic parameter model includes the water overflow ratio model and the displacement intensity model.

6. The reservoir geological modeling method for characterizing the time-varying characteristics of a reservoir according to claim 5, characterized in that: A reservoir geological model that characterizes the time-varying characteristics of the reservoir is established. Specifically, on the basis of the static geological model of the reservoir, a time-varying prediction model of reservoir physical property parameters and a reservoir dynamic parameter model at a certain moment in the oilfield development process are introduced. Through inter-model operations, the above functional relationship is substituted into the three-dimensional model calculator to establish a reservoir time-varying geological model corresponding to the moment of the reservoir dynamic parameter model.

7. A reservoir geological modeling device for characterizing the time-varying characteristics of a reservoir, characterized in that: include: The first unit is configured to establish a static geological model of the reservoir before the reservoir is put into production; The second unit is configured to use laboratory testing technology as a means and the actual parameters of the developed oil field as a basis to analyze the dynamic changes of core samples of different types of reservoirs during the displacement process and determine the time-varying prediction model of reservoir physical property parameters; a third unit configured to establish a reservoir dynamic parameter model; The fourth unit is configured to introduce the time-varying prediction model of reservoir physical property parameters and the reservoir dynamic parameter model as constraints on the basis of the static geological model of the reservoir to establish a reservoir geological model that characterizes the time-varying characteristics of the reservoir.

8. An electronic device, characterized in that: include: at least one processor; and a memory communicatively connected to the processor; wherein the memory stores instructions executable by the processor, and the instructions are executed by the processor to enable the processor to perform the method according to any one of claims 1-6.

9. A computer-readable storage medium storing one or more programs, characterized in that: The one or more programs include computer instructions for causing a computer to execute the method according to any one of claims 1 to 6.

Images