A processing method, device and medium for developing anisotropic heavy oil reservoirs

Abstract

The present application discloses a processing method, device and medium for the development of anisotropic heavy oil reservoirs, which are applied to the field of reservoir development. The present application provides a processing method for the development of anisotropic heavy oil reservoirs, which first obtains the main control parameters affecting the oil-gas ratio in the target block and the permeability anisotropy ratio of the target block, and then determines the critical permeability anisotropy ratio corresponding to the target block according to the main control parameters. If the permeability anisotropy ratio corresponding to the target block is greater than the critical permeability anisotropy ratio, it is determined that the corresponding target block meets the exploitation requirements. The present application obtains the critical permeability anisotropy ratio by screening out the main control parameters affecting the oil-gas ratio and by using the main control parameters of the target block, and then judges whether the target block meets the exploitation requirements according to the permeability anisotropy ratio of the target block, thereby ensuring that the oil production, economic benefits, etc. of the reservoir development meet the exploitation requirements.

Description

Technical Field

[0001] The present application relates to the field of oil reservoir development, and in particular to a processing method, a device and a medium for developing anisotropic heavy oil reservoirs. Background Art

[0002] Reservoirs with directional permeability are called anisotropic reservoirs, or anisotropic permeability reservoirs. The existence of anisotropy is mainly due to the different sorting degrees and arrangements of rock particles during the sedimentation process, which causes the permeability of the reservoir in different directions to be different, resulting in the existence of reservoir anisotropy. Steam Assisted Gravity Drainage (SAGD) technology has been well applied in isotropic heavy oil reservoirs, but the development and application of anisotropic reservoirs is relatively small, so there are certain problems in the SAGD development of anisotropic reservoirs.

[0003] At present, in the process of reservoir development, various parameters affecting the target block in exploitation and the permeability anisotropy ratio are not taken into account, resulting in the oil production during reservoir exploitation not meeting the expected requirements.

[0004] It can be seen that how to ensure that the oil production of oil reservoir development meets the requirements is an urgent problem to be solved by technical personnel in this field. Summary of the invention

[0005] The purpose of the present application is to provide a processing method, device and medium for the development of anisotropic heavy oil reservoirs to ensure that the oil-gas ratio of the reservoir development meets the requirements.

[0006] In order to solve the above technical problems, the present application provides a processing method for developing anisotropic heavy oil reservoirs, comprising:

[0007] Obtain the permeability anisotropy ratio of the target block and the main control parameters affecting the oil-gas ratio;

[0008] Determining the critical permeability anisotropy ratio corresponding to the target block according to the main control parameters;

[0009] If the permeability anisotropy ratio corresponding to the target block is greater than the critical permeability anisotropy ratio, it is determined that the corresponding target block meets the mining requirements.

[0010] Preferably, the main control parameters are obtained from a pre-established anisotropic reservoir numerical simulation model.

[0011] Preferably, the establishment of the anisotropic reservoir numerical simulation model includes:

[0012] Acquiring fluid parameters and geological parameters of a plurality of target blocks;

[0013] A numerical simulation model of the anisotropic reservoir is established according to the fluid parameters and the geological parameters.

[0014] Preferably, the main control parameters include at least one of the following: reservoir thickness, permeability, porosity, oil saturation, reservoir depth, and steam dryness.

[0015] Preferably, the main control parameters include: reservoir thickness, permeability, porosity, oil saturation, reservoir depth, steam dryness;

[0016] The weights of the main control parameters affecting the oil-gas ratio are as follows from large to small:

[0017] Reservoir thickness, permeability, porosity, oil saturation, reservoir depth, steam dryness.

[0018] Preferably, obtaining the main control parameters through the anisotropic reservoir numerical simulation model includes:

[0019] The main control parameters affecting the oil-gas ratio are determined through orthogonal experiments.

[0020] Preferably, the anisotropic reservoir numerical simulation model is established by reservoir numerical simulation software.

[0021] In order to solve the above technical problems, the present application also provides a processing device for developing anisotropic heavy oil reservoirs, comprising:

[0022] The acquisition module is used to obtain the permeability anisotropy ratio of the target block and the main control parameters affecting the oil-gas ratio;

[0023] A first determination module, used to determine the critical permeability anisotropy ratio corresponding to the target block according to the main control parameters;

[0024] The second determination module is used to determine that the corresponding target block meets the mining requirements if the permeability anisotropy ratio corresponding to the target block is greater than the critical permeability anisotropy ratio.

[0025] To solve the above technical problems, the present application also provides a processing device for anisotropic heavy oil reservoir development, comprising: a memory for storing a computer program;

[0026] The processor is used to implement the steps of the above-mentioned processing method for anisotropic heavy oil reservoir development when executing the computer program.

[0027] In order to solve the above technical problems, the present application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the processing method for developing anisotropic heavy oil reservoirs are implemented.

[0028] The present application provides a processing method for the development of anisotropic heavy oil reservoirs, which first obtains the main control parameters affecting the oil-gas ratio in the target block and the permeability anisotropy ratio of the target block, and then determines the critical permeability anisotropy ratio corresponding to the target block according to the main control parameters. If the permeability anisotropy ratio corresponding to the target block is greater than the critical permeability anisotropy ratio, it is determined that the corresponding target block meets the mining requirements. The present application obtains the critical permeability anisotropy ratio by screening the main control parameters affecting the oil-gas ratio and the main control parameters of the target block, and then judges whether the target block meets the mining requirements according to the permeability anisotropy ratio of the target block, so as to ensure that the oil production, economic benefits, etc. of the reservoir development meet the mining requirements.

[0029] The present application also provides a processing device and a computer-readable storage medium for the development of anisotropic heavy oil reservoirs, which correspond to the above method and thus have the same beneficial effects as the above method. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 A flow chart of a processing method for developing anisotropic heavy oil reservoirs provided in an embodiment of the present application;

[0032] Figure 2 A curve diagram showing the relationship between cumulative oil production and anisotropy ratio at different reservoir thicknesses provided in the embodiment of the present application;

[0033] Figure 3 A curve diagram showing the relationship between the permeability anisotropy ratio and the cumulative production of the reservoir thickness and the ultimate economic cumulative oil production provided in an embodiment of the present application;

[0034] Figure 4 A structural diagram of a processing device for developing anisotropic heavy oil reservoirs provided in an embodiment of the present application;

[0035] Figure 5 A structural diagram of a processing device for developing anisotropic heavy oil reservoirs provided in another embodiment of the present application. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] The core of this application is to provide a processing method, device and medium for the development of anisotropic heavy oil reservoirs to ensure that the oil-gas ratio of the reservoir development meets the requirements.

[0038] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0039] The reservoir with directional permeability is called anisotropic reservoir, or anisotropic permeability reservoir. The existence of anisotropy is mainly due to the different sorting degree and arrangement of rock particles during the sedimentation process, which causes the permeability of the reservoir in different directions to be different, resulting in the existence of reservoir anisotropy. Anisotropic reservoirs are widely distributed. From the current situation of petroleum exploration in my country, anisotropic medium heavy oil reservoirs account for 60% of my country's proven heavy oil reserves. This application studies the SAGD development of anisotropic heavy oil reservoirs, takes into account the development characteristics of SAGD in actual oil fields, establishes a numerical simulation model of anisotropic reservoirs, and reasonably screens the main control parameters that affect the oil-gas ratio based on the key parameter oil-gas ratio for evaluating the economics of SAGD development. By adjusting these main control parameters, the critical permeability anisotropy ratio of the reservoir is obtained, which effectively solves the problem that the economics of SAGD development of anisotropic reservoirs is difficult to evaluate. This application reasonably avoids the economic risks of SAGD development of anisotropic reservoirs and has certain guiding significance for protecting the economic benefits of on-site development of anisotropic reservoirs. Figure 1 A flowchart of a processing method for developing anisotropic heavy oil reservoirs provided in an embodiment of the present application; Figure 1 As shown, the method comprises the following steps:

[0040] S10: Obtain the permeability anisotropy ratio of the target block and the main control parameters affecting the oil-gas ratio.

[0041] S11: Determine the critical permeability anisotropy ratio corresponding to the target block according to the main control parameters.

[0042] S12: If the permeability anisotropy ratio corresponding to the target block is greater than the critical permeability anisotropy ratio, it is determined that the corresponding target block meets the mining requirements.

[0043] In practical applications, due to the different parameters of reservoir thickness, reservoir temperature, crude oil viscosity, reservoir depth, porosity, permeability, oil saturation, etc. in different SAGD well development areas, it is necessary to first determine the main control parameters that affect the oil-gas ratio. In this embodiment, an orthogonal test can be used to determine the main control parameters that affect the oil-gas ratio. This embodiment considers 13 parameters, and each parameter is set at 2 levels, that is, using an orthogonal table L 27 (13 3 ). A total of 27 numerical simulations were performed. The specific parameters include reservoir thickness, porosity, reservoir horizontal permeability, steam dryness, injection temperature, crude oil density, thermal conductivity, crude oil viscosity, injection pressure, initial oil saturation, reservoir heat capacity, compressibility, and net-to-gross ratio. The reservoir lateral permeability was set to 5000mD, 3000mD, and 1000mD, and the steam dryness was set to 0.5, 0.7, and 0.9, respectively. The values ​​of other parameters are shown in Table 1.

[0044] Table 1 SAGD development parameter values

[0045]

[0046] For the SAGD process, its economy is very important, and the key parameter for evaluating its economy is the oil-gas ratio. Therefore, this embodiment takes the oil-gas ratio as the target and simulates the cumulative oil-gas ratio in the later stage of SAGD development under different parameter value schemes. The larger the cumulative oil-gas ratio, the more heavy oil is produced when the same steam is injected. After obtaining the results, the data is subjected to a range analysis. The larger the range, the greater the influence of the parameter on the oil-gas ratio. According to the calculation results, the main control parameters affecting the oil-gas ratio are, from large to small, reservoir thickness, permeability, porosity, oil saturation, reservoir depth, and steam dryness, while the remaining parameters have little influence on the oil-gas ratio and can be ignored in practical applications.

[0047] After obtaining the main control parameters that affect the oil-gas ratio, different parameter values ​​of the main control parameters have different requirements for the critical permeability anisotropy ratio of SAGD production under different crude oil prices. In order to obtain better economic benefits, it is necessary to screen the critical permeability anisotropy ratio and determine the critical permeability anisotropy ratio of SAGD production under different formation parameters (i.e., main control parameters). This embodiment mainly studies the established anisotropic heavy oil reservoir conceptual model, and the maximum permeability anisotropy ratio studied is k v / h k =0.90, where k v is the longitudinal permeability, k h is the lateral permeability.

[0048] The embodiment of the present application can use the cumulative oil production method to study the economic limit index. It is defined as: the cumulative oil production when the income is equal to the total investment after the oil well is put into production. The economic limit cumulative oil production of a single well is:

[0049]

[0050] In the formula, D is the total period cost, unit: yuan / t; N is the cumulative oil production of the economic limit of a single well, unit: t; I is the average investment of a single well, unit: yuan / well; P is the steam injection cost, unit: yuan / t; E is the tax, unit: yuan / t; W is the cumulative steam injection volume of a single well, unit: t; R is the crude oil commodity rate, expressed in percentage; C is the crude oil selling price, unit: yuan / t; G is the crude oil operating fee, unit: yuan / t. Combined with the actual situation of SAGD production on site in domestic oil fields, the specific values ​​of various costs are determined. Taking the reservoir thickness as an example, for heavy oil reservoirs, the greater the reservoir thickness, the greater the total heavy oil reserves in the reservoir, and the better the SAGD development effect, so the reservoir thickness has a greater impact on the critical permeability anisotropy ratio corresponding to SAGD production. Generally, the thickness of the oil reservoir exploited by SAGD does not exceed 100m. Therefore, the late stage of SAGD production is simulated when the reservoir thickness is 20m, 40m, 60m, 80m and 100m and the anisotropy ratio is 0.4, 0.5, 0.6, 0.7, 0.8 and 0.9, and the relationship curve between the cumulative oil production and the anisotropy ratio under different reservoir thicknesses is obtained. Figure 2 The relationship curve between the cumulative oil production and the anisotropy ratio under different reservoir thicknesses provided in the embodiment of the present application; it can be seen from the figure that at the same anisotropy ratio (permeability anisotropy ratio), as the reservoir thickness increases, the cumulative production (cumulative oil production) gradually increases. The closer the anisotropy ratio is to 1, that is, the closer the anisotropy is to an isotropic reservoir, the greater the cumulative oil production.

[0051] According to formula (1), the economic limit cumulative oil production at different crude oil prices can be obtained. By comparing the cumulative production under different permeability anisotropy ratios and different reservoir heights with the economic limit cumulative production, we can obtain the critical permeability anisotropy ratio screening relationship diagram with the change of crude oil prices at different reservoir heights. Taking the crude oil price of US$70 / barrel as an example, the calculated single well economic limit cumulative oil production is 12576.6m^3. Figure 3 A graph showing the relationship between the permeability anisotropy ratio and the cumulative production of the reservoir thickness and the ultimate economic cumulative oil production provided in the embodiment of the present application; it can be seen from the figure that the permeability anisotropy ratio corresponding to different reservoir thicknesses at 70 US dollars per barrel, the anisotropy ratio under different reservoir thicknesses needs to be higher than a certain value to ensure the economic development, and the greater the reservoir thickness, the lower the economically efficient permeability anisotropy ratio. Similar calculations are performed for different oil prices, and the critical anisotropy table values ​​of the reservoir suitable for dual horizontal well SAGD production can be obtained as shown in Table 2.

[0052] Table 2 Screening results of critical anisotropy ratio of reservoirs at different oil prices and different reservoir thicknesses

[0053]

[0054] From the results of the screening of the critical permeability anisotropy ratio, it can be seen that as the thickness of the reservoir increases, the permeability anisotropy range of the reservoir that meets the requirements and can be exploited becomes larger and larger; as the price of crude oil rises, the economic critical permeability anisotropy ratio becomes smaller and smaller, and the exploitable permeability anisotropy range also becomes larger and larger; when the reservoir thickness is small to a certain value, the permeability anisotropy ratio is too large and it is not suitable for dual horizontal well SAGD exploitation. For example, at $50, a reservoir thickness of 20m has no economic benefits, and at $60, the economic critical anisotropy value needs to reach 0.93, which is also close to isotropic reservoirs, that is, most anisotropic reservoirs are not suitable for development.

[0055] The same treatment is performed on the cumulative production under different permeabilities, porosities, oil saturations and different anisotropy ratios, and different critical permeability anisotropy ratios can be obtained. The above technical solution is used to consider as many parameters as possible that affect the economics of SAGD development in actual reservoirs, and the SAGD numerical simulation under different parameters can be simulated, and finally the critical anisotropy ratios under different oil prices and different parameter values ​​can be screened out.

[0056] In this embodiment, after obtaining the main control parameters, for the target block to be mined, the main control parameters and permeability anisotropy ratio of the target block are first obtained, and the critical permeability anisotropy ratio corresponding to the target block is determined according to the main control parameters, that is, the target block meets the critical requirements of the mining conditions under the conditions of the obtained main control parameters, that is, the critical permeability anisotropy ratio. The mining conditions can be set according to the cumulative oil production, mining efficiency, economic benefits, etc. The larger the ratio of the permeability anisotropy ratio, the higher the mining efficiency. If the permeability anisotropy ratio corresponding to the target block is greater than the critical permeability anisotropy ratio, it is determined that the corresponding target block meets the mining requirements, that is, the economic efficiency or oil production of the target block meets the expected requirements. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. In this way, if these modifications and variations of the present application belong to the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these changes and variations. For example, after obtaining the main control parameters and permeability anisotropy ratio of the target block, it is possible to directly determine whether the target block meets the mining requirements based on the main control parameters and the permeability anisotropy ratio.

[0057] The present application provides a processing method for the development of anisotropic heavy oil reservoirs, which first obtains the main control parameters affecting the oil-gas ratio in the target block and the permeability anisotropy ratio of the target block, and then determines the critical permeability anisotropy ratio corresponding to the target block according to the main control parameters. If the permeability anisotropy ratio corresponding to the target block is greater than the critical permeability anisotropy ratio, it is determined that the corresponding target block meets the mining requirements. The present application obtains the critical permeability anisotropy ratio by screening the main control parameters affecting the oil-gas ratio and the main control parameters of the target block, and then judges whether the target block meets the mining requirements according to the permeability anisotropy ratio of the target block, so as to ensure that the oil production, economic benefits, etc. of the reservoir development meet the mining requirements.

[0058] As the development of conventional crude oil resources is becoming increasingly exhausted, heavy oil resources have gradually attracted widespread attention. Heavy oil refers to crude oil with a density greater than 0.92g / cm3 and a viscosity greater than 50mPa·s under formation conditions. It is estimated that the reserves of heavy oil are as high as 108.5 billion barrels, which is approximately equal to the remaining conventional oil reserves on the earth. my country's heavy oil resources are widely distributed. So far, more than 70 heavy oil fields have been discovered across the country, and the total reserves of heavy oil and asphalt resources are estimated to reach 300×108t. Since heavy oil is difficult to flow under formation conditions, conventional oil production methods are difficult to effectively produce heavy oil. Under normal circumstances, heavy oil is mainly produced by thermal oil production, that is, through a series of process technologies, the temperature of the heavy oil reservoir is increased and the viscosity of the crude oil is reduced, thereby changing the fluidity of the heavy oil in the formation and finally producing it smoothly. This is currently a relatively mature and effective technology for producing heavy oil. In heavy oil thermal production, SAGD is a relatively mature and widely used thermal production technology. This technology has a good effect in field application and has greatly improved the degree of production of oil sand resources. Unlike conventional methods, the driving energy used by SAGD is the gravity of crude oil itself. High-temperature steam is injected into the oil sands to heat the solid asphalt oil in the formation to reduce viscosity, thereby making the asphalt oil fluid. Then the condensed water of the hot oil and steam flows along the steam chamber interface to the production well. In the SAGD process, two horizontal wells are placed at the bottom of the reservoir, which are parallel to each other and on the same longitudinal section. The upper one is the steam injection well and the lower one is the production well. The distance between the two horizontal wells is 3-5m. Steam is continuously injected into the heavy oil production well. The steam forms a steam chamber in the formation and transfers heat to the formation. After the heavy oil is heated and reduced in viscosity, it continuously flows to the production well along the steam chamber interface.

[0059] In practical application, the fluid parameters and geological parameters of the target block rock are first obtained through experiments. Then, based on the fluid parameters and combined with the field geological parameters, a numerical simulation model of the anisotropic reservoir developed by SAGD is established using reservoir numerical simulation software. On the basis of the anisotropic reservoir numerical simulation model, the main control parameters affecting the economic benefits are determined through orthogonal experiments. The critical permeability anisotropy ratio suitable for dual horizontal well SAGD exploitation under different oil prices is selected for different main control parameters, which provides a reference for the production of anisotropic reservoirs.

[0060] In the above embodiments, the processing method for anisotropic heavy oil reservoir development is described in detail, and the present application also provides an embodiment corresponding to the processing device for anisotropic heavy oil reservoir development. It should be noted that the present application describes the embodiments of the device part from two perspectives, one is based on the perspective of functional modules, and the other is based on the perspective of hardware.

[0061] Based on the perspective of functional modules, this embodiment provides a processing device for developing anisotropic heavy oil reservoirs. Figure 4 The structural diagram of the processing device for developing anisotropic heavy oil reservoirs provided in the embodiment of the present application is as follows: Figure 4 As shown, the device comprises:

[0062] An acquisition module 10 is used to acquire the permeability anisotropy ratio of the target block and the main control parameters affecting the oil-gas ratio;

[0063] A first determination module 11 is used to determine the critical permeability anisotropy ratio corresponding to the target block according to the main control parameters;

[0064] The second determination module 12 is used to determine that the corresponding target block meets the mining requirements if the permeability anisotropy ratio corresponding to the target block is greater than the critical permeability anisotropy ratio.

[0065] Since the embodiments of the apparatus part correspond to the embodiments of the method part, please refer to the description of the embodiments of the method part for the embodiments of the apparatus part, which will not be repeated here.

[0066] The processing device for developing anisotropic heavy oil reservoirs provided in this embodiment corresponds to the above method and thus has the same beneficial effects as the above method.

[0067] From the perspective of hardware, this embodiment provides another processing device for developing anisotropic heavy oil reservoirs. Figure 5 A structural diagram of a processing device for developing anisotropic heavy oil reservoirs provided in another embodiment of the present application, such as Figure 5 As shown, the processing device for anisotropic heavy oil reservoir development includes: a memory 20 for storing a computer program;

[0068] The processor 21 is used to implement the steps of the processing method for developing anisotropic heavy oil reservoirs mentioned in the above embodiment when executing the computer program.

[0069] Among them, the processor 21 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 21 can be implemented in at least one hardware form of a digital signal processor (DSP), a field-programmable gate array (FPGA), and a programmable logic array (PLA). The processor 21 may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also known as a central processing unit (CPU); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor 21 may be integrated with a graphics processing unit (GPU), which is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 21 may also include an artificial intelligence (AI) processor, which is used to process computing operations related to machine learning.

[0070] The memory 20 may include one or more computer-readable storage media, which may be non-transitory. The memory 20 may also include a high-speed random access memory, and a non-volatile memory, such as one or more disk storage devices, flash memory storage devices. In this embodiment, the memory 20 is at least used to store the following computer program 201, wherein, after the computer program is loaded and executed by the processor 21, the relevant steps of the processing method for the development of anisotropic heavy oil reservoirs disclosed in any of the aforementioned embodiments can be implemented. In addition, the resources stored in the memory 20 may also include an operating system 202 and data 203, etc., and the storage method may be temporary storage or permanent storage. Among them, the operating system 202 may include Windows, Unix, Linux, etc. Data 203 may include but is not limited to data related to the processing method for the development of anisotropic heavy oil reservoirs, etc.

[0071] In some embodiments, the processing device for anisotropic heavy oil reservoir development may further include a display screen 22 , an input / output interface 23 , a communication interface 24 , a power supply 25 , and a communication bus 26 .

[0072] Those skilled in the art will appreciate that the structure shown in the figure does not constitute a limitation on the processing device for developing anisotropic heavy oil reservoirs, and may include more or fewer components than those shown in the figure.

[0073] The processing device for anisotropic heavy oil reservoir development provided in the embodiment of the present application includes a memory and a processor. When the processor executes the program stored in the memory, it can implement the following method: a processing method for anisotropic heavy oil reservoir development.

[0074] The processing device for developing anisotropic heavy oil reservoirs provided in this embodiment corresponds to the above method and thus has the same beneficial effects as the above method.

[0075] Finally, the present application also provides an embodiment corresponding to a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps recorded in the above method embodiment are implemented.

[0076] It is understandable that if the method in the above embodiment is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium 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), random access memory (RAM), disk or optical disk and other media that can store program code.

[0077] The computer-readable storage medium provided in this embodiment corresponds to the above method and thus has the same beneficial effects as the above method.

[0078] The above is a detailed introduction to a processing method, device and medium for the development of anisotropic heavy oil reservoirs provided by the present application. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the embodiments can be referenced to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

[0079] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method, article or device including the above elements.

Claims

1. A processing method for developing anisotropic heavy oil reservoirs, characterized in that: include: Obtaining the permeability anisotropy ratio of the target block and the main control parameters affecting the oil-gas ratio; wherein the permeability anisotropy ratio is the ratio of the longitudinal permeability to the lateral permeability; Determining the critical permeability anisotropy ratio corresponding to the target block according to the master control parameters, including: using a pre-established anisotropic reservoir numerical simulation model, determining the master control parameters affecting economic benefits through orthogonal experiments on the basis of the anisotropic reservoir numerical simulation model, and screening out the critical permeability anisotropy ratios that can be exploited under different oil prices for different master control parameters; wherein the critical permeability anisotropy ratio is the critical requirement for the target block to meet the exploitation conditions under the condition of the obtained master control parameters; If the permeability anisotropy ratio corresponding to the target block is greater than the critical permeability anisotropy ratio, it is determined that the corresponding target block meets the mining requirements.

2. The method for developing anisotropic heavy oil reservoirs according to claim 1, characterized in that: The main control parameters are obtained from a pre-established anisotropic reservoir numerical simulation model.

3. The method for developing anisotropic heavy oil reservoirs according to claim 2, characterized in that: The establishment of the anisotropic reservoir numerical simulation model includes: Acquiring fluid parameters and geological parameters of a plurality of target blocks; A numerical simulation model of the anisotropic reservoir is established according to the fluid parameters and the geological parameters.

4. The method for developing anisotropic heavy oil reservoirs according to claim 3, characterized in that: The main control parameters include at least one of the following: reservoir thickness, permeability, porosity, oil saturation, reservoir depth, and steam dryness.

5. The method for developing anisotropic heavy oil reservoirs according to claim 4, characterized in that: The main control parameters include: reservoir thickness, permeability, porosity, oil saturation, reservoir depth, and steam dryness; The weights of the main control parameters affecting the oil-gas ratio are as follows from large to small: Reservoir thickness, permeability, porosity, oil saturation, reservoir depth, steam dryness.

6. The processing method for developing anisotropic heavy oil reservoirs according to claim 2, characterized in that: Obtaining the main control parameters through the anisotropic reservoir numerical simulation model includes: The main control parameters affecting the oil-gas ratio are determined through orthogonal experiments.

7. The processing method for developing anisotropic heavy oil reservoirs according to claim 2, characterized in that: The anisotropic reservoir numerical simulation model is established by using reservoir numerical simulation software.

8. A processing device for the development of anisotropic heavy oil reservoirs, characterized in that: include: An acquisition module is used to acquire the permeability anisotropy ratio of the target block and the main control parameters affecting the oil-gas ratio; wherein the permeability anisotropy ratio is the ratio of the longitudinal permeability to the lateral permeability; A first determination module, used to determine the critical permeability anisotropy ratio corresponding to the target block according to the main control parameters; The second determination module is used to determine that the corresponding target block meets the exploitation requirements if the permeability anisotropy ratio corresponding to the target block is greater than the critical permeability anisotropy ratio, including: using a pre-established anisotropic reservoir numerical simulation model, determining the main control parameters affecting the economic benefits through orthogonal experiments on the basis of the anisotropic reservoir numerical simulation model, and screening out the critical permeability anisotropy ratios that can be exploited under different oil prices for different main control parameters; wherein the critical permeability anisotropy ratio is the critical requirement for the target block to meet the exploitation conditions under the conditions of the obtained main control parameters.

9. A processing device for developing anisotropic heavy oil reservoirs, characterized in that: comprising a memory for storing a computer program; A processor, configured to implement the steps of the processing method for developing anisotropic heavy oil reservoirs as claimed in any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the processing method for developing anisotropic heavy oil reservoirs according to any one of claims 1 to 7 are implemented.

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