Method and device for determining the energy sufficiency limit of an anticline oil reservoir

Abstract

The application discloses a method and device for determining the energy sufficiency limit of an anticline oil reservoir. The method comprises the following steps: determining geological data and development data of the anticline oil reservoir; determining at least one annular well row data according to a supply edge radius in the geological data, well row spacing in the development data and the number of oil wells in each annular well row; determining the bottom hole flowing pressure of each annular well row according to the geological data, the development data and the annular well row data; and determining the energy sufficiency limit of the anticline oil reservoir based on the bottom hole flowing pressure and a bottom hole flowing pressure threshold in the development data. By executing the scheme, it can be determined whether the oil reservoir can be developed completely by relying on natural energy, and the range of insufficient energy of the oil reservoir can be determined.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oilfield development reservoir engineering, and in particular to a method and device for determining an energy sufficient limit of an anticline reservoir. BACKGROUND

[0002] A marine sandstone reservoir refers to an oil reservoir formed in a sandstone reservoir deposited in a marine environment. The reservoir has stable reservoir thickness, wide planar distribution, and a huge volume of natural water bodies developed outside the reservoir.

[0003] When the water body is an infinite water body, a conventional method considers that in the whole life cycle of reservoir development, any position in the entire oil-bearing range is energy sufficient, and the reservoir can be completely developed by natural edge water energy without the need for artificial water injection to supplement energy. However, in actual reservoir development, even if there is an infinite water body, there are still energy insufficient areas in the reservoir, and oil wells cannot be normally produced, but there is no method for calculating the energy sufficient limit of the reservoir in related technologies. SUMMARY

[0004] The present application provides a method and device for determining an energy sufficient limit of an anticline reservoir, which can accurately determine whether the reservoir can be completely developed by natural energy and clearly define the energy insufficient range of the reservoir.

[0005] According to an aspect of the present application, a method for determining an energy sufficient limit of an anticline reservoir is provided, which includes:

[0006] determining geological data and development data of the anticline reservoir;

[0007] determining at least one annular well row data according to a supply edge radius in the geological data, a well row spacing in the development data, and the number of oil wells in each annular well row;

[0008] determining a bottom hole flowing pressure of each annular well row according to the geological data, the development data, and each annular well row data;

[0009] determining the energy sufficient limit of the anticline reservoir based on each bottom hole flowing pressure and a bottom hole flowing pressure threshold in the development data.

[0010] According to another aspect of the present application, a device for determining an energy sufficient limit of an anticline reservoir is provided, which includes:

[0011] a anticline reservoir data determination module configured to determine geological data and development data of the anticline reservoir;

[0012] an annular well row data determination module configured to determine at least one annular well row data according to a supply edge radius in the geological data, a well row spacing in the development data, and the number of oil wells in each annular well row;

[0013] a bottom hole flowing pressure determination module configured to determine a bottom hole flowing pressure of each of the annular well rows based on the geological data, the development data, and each of the annular well row data;

[0014] an energy sufficient limit determination module configured to determine an energy sufficient limit of the anticline reservoir based on each of the bottom hole flowing pressures and a bottom hole flowing pressure threshold in the development data.

[0015] According to another aspect of the present application, there is provided an electronic device comprising:

[0016] at least one processor; and

[0017] a memory communicatively connected to the at least one processor; wherein,

[0018] the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to perform the method for determining an energy sufficient limit of an anticline reservoir according to any one of the embodiments of the present application.

[0019] According to another aspect of the present application, there is provided a computer readable storage medium storing computer instructions for enabling a processor to perform the method for determining an energy sufficient limit of an anticline reservoir according to any one of the embodiments of the present application when executed by the processor.

[0020] The technical solution of the embodiments of the present application determines geological data and development data of an anticline reservoir, determines at least one annular well row data based on a supply edge radius in the geological data, a well row spacing in the development data, and a number of oil wells in each annular well row, determines a bottom hole flowing pressure of each of the annular well rows based on the geological data, the development data, and each of the annular well row data, and determines an energy sufficient limit of the anticline reservoir based on each of the bottom hole flowing pressures and a bottom hole flowing pressure threshold in the development data. By executing the solution provided by the embodiments of the present application, it can be determined whether the reservoir can be developed completely relying on natural energy, and the range of insufficient energy of the reservoir can be determined.

[0021] It should be understood that the content described in this section is not intended to identify key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to make the technical solutions in the embodiments of the present application clearer, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0023] Figure 1 is a flow chart of a method for determining an energy sufficient limit of an anticline reservoir provided by an embodiment of the present application;

[0024] Figure 2 is a schematic diagram of an energy sufficient limit of an anticline reservoir provided by an embodiment of the present application;

[0025] Figure 3 is a structural schematic diagram of a determination device for an energy sufficient limit of an anticline reservoir provided by an embodiment of the present application;

[0026] Figure 4 is a structural schematic diagram of an electronic device for implementing the method for determining an energy sufficient limit of an anticline reservoir provided by an embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to make the technical solutions in the embodiments of the present application clearer, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0028] It should be noted that the terms "first", "second", and the like in the description and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily have to include those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0029] Figure 1is a flowchart of a method for determining an energy sufficient boundary of an anticline reservoir provided by the embodiment of the present application. The embodiment can be applicable to the case of determining an energy sufficient area of an anticline reservoir. The method can be executed by an anticline reservoir energy sufficient boundary determination device which can be realized in the form of hardware and / or software and can be configured in an electronic device for determining an anticline reservoir energy sufficient boundary. As shown in Figure 1 , the method comprises:

[0030] S110: determining geological data and development data of the anticline reservoir.

[0031] The geological data can be set according to actual needs. For example, the geological data can include a supply edge radius of the anticline reservoir. The geological data can also include an inner oil-water boundary radius of the anticline reservoir, reservoir thickness, reservoir permeability, formation crude oil viscosity, and formation pressure at the supply edge. The development data can be set according to actual needs. For example, the development data can include well spacing, bottom hole flowing pressure threshold, and maximum liquid volume of the oil well. The development data can also include a target oil production of the oil well.

[0032] S120: determining at least one annular well row data according to the supply edge radius in the geological data, the well spacing in the development data, and the number of oil wells in each annular well row.

[0033] For example, the present scheme can determine at least one annular well row data according to the supply edge radius in the geological data, the well spacing in the development data, and the number of oil wells in each annular well row. The number of oil wells in each annular well row can also be set according to actual needs. The annular well row data can include well spacing of the annular well row, bottom hole radius, and ring radius of the annular well row. For example, the present scheme assumes that the oil wells are arranged in annular well rows from the supply edge of the reservoir to the inside, the supply edge radius is r e , the well spacing of each row of oil wells is L, the number of oil wells in each annular well row is represented by n1, n2, …, n n , the ring radius of each annular well row is represented by r1, r2, …, r n , the oil wells in the same annular well row are uniformly distributed, the well spacing of each annular well row is 2d n = 2π×r n / n n , the well spacing of different well rows can be different, the bottom hole radius of each oil well, the target oil production of the oil well, and the bottom hole flowing pressure in the same annular well row are the same. The ring radius of the first row of oil wells is r e -L, and the ring radius of each subsequent well row is r n =r n-1L (n≥2), when the ring radius of the (n-1)th row of oil wells is equal to the row spacing, 1 oil well is deployed in the center of the reservoir, that is, the nth row of wells is a well in the center of the reservoir. When the ring radius of the (n-1)th row of oil wells is less than the row spacing, the nth row of oil wells is no longer deployed in the reservoir, and at this time, the reservoir has n-1 ring rows of wells. The development data of the anticline reservoir and the ring row data can be represented as shown in Table 1:

[0034] Table 1

[0035]

[0036] S130: determining the bottom hole flowing pressure of each ring row of wells according to the geological data, the development data, and each ring row data.

[0037] In this scheme, the bottom hole flowing pressure of each ring row of wells can be determined according to the geological data, the development data, and each ring row data. Then, the differential equations of the bottom hole flowing pressure between any two adjacent ring rows of wells are combined into an equation group, and the equation group is solved to determine the bottom hole flowing pressure of each ring row of wells.

[0038] In this embodiment, the bottom hole flowing pressure of each ring row of wells can be determined according to the geological data, the development data, and each ring row data. The method comprises the following steps: determining the differential equation of the bottom hole flowing pressure between each adjacent ring row of wells based on the equivalent seepage resistance method; combining each differential equation to obtain a differential equation group; inputting the geological data, the development data, and each ring row data into the differential equation group to obtain the bottom hole flowing pressure of each ring row of wells; the geological data comprises the reservoir thickness, the reservoir permeability, the formation crude oil viscosity, and the formation pressure at the supply edge of the anticline reservoir; the development data comprises the target oil production of the oil well; and the ring row data comprises the well spacing of the ring row of wells, the bottom hole radius, and the ring radius of the ring row of wells.

[0039] For example, the equivalent seepage resistance method in reservoir engineering can be used to list the production formula of each row of wells. The differential equations of the bottom hole flowing pressure between each adjacent row of wells are combined to obtain an equation group, and the bottom hole flowing pressure of each row of wells is solved. The differential equation of the bottom hole flowing pressure from the supply edge of the reservoir to the first row of oil wells is:

[0040]

[0041] The differential equation of the bottom hole flowing pressure from the first row of oil wells to the second row of oil wells is:

[0042]

[0043] The differential equation of the bottom hole flowing pressure from the second row of oil wells to the third row of oil wells is:

[0044]

[0045] The pressure difference equation of the bottom-hole flowing pressure from the n-2th row of oil wells to the n-1th row of oil wells is:

[0046]

[0047] Only when the n th row of oil wells is the center well of the reservoir, otherwise, the reservoir has n-1 annular well rows. The pressure difference equation of the bottom-hole flowing pressure from the n-1th row of oil wells to the center well of the reservoir is:

[0048]

[0049] Where, the reservoir thickness, reservoir permeability, formation crude oil viscosity and formation pressure at the supply edge of the anticline reservoir are represented by h, k, μ, p e respectively, the target oil production of the i th row of oil wells, the bottom-hole radius of the i th row of annular well rows and the annular radius of the i th row of annular well rows are represented by q i , r wi , r i respectively, and the formation pressure at the supply edge is represented by p e . By combining the above formulas, the bottom-hole flowing pressures of each well row can be solved: p wf1 , p wf2 , p wf3 , p wf4 , …, p wf(n-1) and p wfn (only when the n th row of wells is the center well of the reservoir) The bottom-hole flowing pressure calculation formula of each well row is as follows:

[0050]

[0051]

[0052]

[0053]

[0054] The bottom-hole flowing pressure of the n th row of oil wells is:

[0055]

[0056] Therefore, by using the equivalent seepage resistance method to process the geological data and development data of the reservoir, the bottom-hole flowing pressures of each annular well row are obtained, which can provide reliable data sources for subsequent steps.

[0057] S140: determining the energy sufficient boundary of the anticline reservoir based on each of the bottom hole flowing pressures and a bottom hole flowing pressure threshold in the development data.

[0058] The bottom hole flowing pressure threshold can be the minimum bottom hole flowing pressure allowed for normal production, and the bottom hole flowing pressure threshold can be set according to actual needs. The scheme can determine the energy sufficient boundary of the anticline reservoir based on each of the bottom hole flowing pressures and the bottom hole flowing pressure threshold. For example, the scheme can determine the bottom hole flowing pressure that is the same as the bottom hole flowing pressure threshold in each of the bottom hole flowing pressures, and then determine the annular radius of the annular well row corresponding to the bottom hole flowing pressure, and take the annular radius as the energy sufficient boundary of the anticline reservoir. Alternatively, the scheme can regress the annular radius of each annular well row and the bottom hole flowing pressure to obtain a regression curve reflecting the relationship between the annular radius and the bottom hole flowing pressure, and then determine the annular radius corresponding to the bottom hole flowing pressure threshold through the regression curve, and take the annular radius as the energy sufficient boundary of the anticline reservoir.

[0059] In the embodiment, optionally, the determination of the energy sufficient boundary of the anticline reservoir based on each of the bottom hole flowing pressures and the bottom hole flowing pressure threshold comprises: taking the bottom hole flowing pressure that is the same as the bottom hole flowing pressure threshold in each of the bottom hole flowing pressures as a target bottom hole flowing pressure; determining a target annular well row associated with the target bottom hole flowing pressure; determining the annular radius of the target annular well row according to the annular well row data, and taking the annular radius of the target annular well row as the energy sufficient boundary of the anticline reservoir.

[0060] In the embodiment, optionally, the determination of the energy sufficient boundary of the anticline reservoir based on each of the bottom hole flowing pressures and the bottom hole flowing pressure threshold comprises: taking the bottom hole flowing pressure that is the same as the bottom hole flowing pressure threshold in each of the bottom hole flowing pressures as a target bottom hole flowing pressure; determining a target annular well row associated with the target bottom hole flowing pressure; determining the annular radius of the target annular well row according to the annular well row data, and taking the annular radius of the target annular well row as the energy sufficient boundary of the anticline reservoir.

[0061] Thus, by taking the bottom hole flowing pressure that is the same as the bottom hole flowing pressure threshold in each of the bottom hole flowing pressures as a target bottom hole flowing pressure, determining a target annular well row associated with the target bottom hole flowing pressure, and determining the annular radius of the target annular well row according to the annular well row data, and taking the annular radius of the target annular well row as the energy sufficient boundary of the anticline reservoir, the scheme can accurately determine whether the reservoir can be developed completely relying on natural energy, and can clearly determine the range of insufficient reservoir energy.

[0062] In one possible implementation, optionally, determining the energy sufficient boundary of the anticline reservoir based on the wellbore flowing pressures and the wellbore flowing pressure threshold value includes: if it is determined that there is no wellbore flowing pressure identical to the wellbore flowing pressure threshold value among the wellbore flowing pressures, performing regression calculation on the annular radii and the wellbore flowing pressures of the annular well rows to obtain regression results; processing the regression results based on a difference calculation method to obtain a target radius corresponding to the wellbore flowing pressure threshold value; and taking the target radius as the energy sufficient boundary of the anticline reservoir.

[0063] For example, if there is no annular radius identical to the wellbore flowing pressure threshold value among the annular radii of the annular well rows that have been determined, the present application can perform regression calculation on the annular radii and the wellbore flowing pressures of the annular well rows to obtain regression results, such as a regression curve, reflecting the relationship between the annular radius and the wellbore flowing pressure, and then process the regression curve based on a difference calculation method to determine an annular radius corresponding to the wellbore flowing pressure threshold value, which is taken as the energy sufficient boundary of the anticline reservoir.

[0064] Therefore, by if it is determined that there is no wellbore flowing pressure identical to the wellbore flowing pressure threshold value among the wellbore flowing pressures, performing regression calculation on the annular radii and the wellbore flowing pressures of the annular well rows to obtain regression results; processing the regression results based on a difference calculation method to obtain a target radius corresponding to the wellbore flowing pressure threshold value; and taking the target radius as the energy sufficient boundary of the anticline reservoir. It can be achieved that the development of the reservoir can be determined whether it can rely on natural energy completely, and the range of insufficient energy of the reservoir can be determined.

[0065] In another possible implementation, optionally, after determining the energy sufficient boundary of the anticline reservoir based on the wellbore flowing pressures and the wellbore flowing pressure threshold value in the development data, the method further includes: determining an energy sufficient area of the anticline reservoir according to the energy sufficient boundary.

[0066] In the present application, after determining the energy sufficient boundary of the anticline reservoir based on the wellbore flowing pressures and the wellbore flowing pressure threshold value in the development data, the energy sufficient area of the anticline reservoir can be determined according to the energy sufficient boundary. For example, the area between the supply edge of the anticline reservoir and the energy sufficient boundary is taken as the energy sufficient area of the anticline reservoir, and the other area between the energy sufficient boundary and the center of the reservoir is taken as the area of insufficient natural energy of the reservoir.

[0067] Therefore, by determining the energy sufficient area of the anticline reservoir according to the energy sufficient boundary. It can be achieved that the range of insufficient energy of the reservoir can be determined.

[0068] In another feasible implementation, optionally, determining the energy-sufficient region of the anticline reservoir based on the energy-sufficient boundary includes: using the area of ​​the region determined by the energy-sufficient boundary as the region radius as the energy-deficient region of the anticline reservoir; determining the area of ​​the anticline reservoir based on the supply edge radius; and using the difference between the area of ​​the region and the energy-deficient region as the energy-sufficient region of the anticline reservoir.

[0069] For example, such as Figure 2 As shown, the supply edge radius is r e =3000m, the energy sufficiency limit for anticline reservoirs is r 界限 =2200m. In this scheme, the area of ​​the region determined by the energy-sufficient boundary of 2200m can be used as the energy-deficient region of the anticline reservoir; the area of ​​the anticline reservoir is determined according to the supply edge radius of 3000m, and the difference between the area of ​​the region and the energy-deficient region is used as the energy-sufficient region of the anticline reservoir. That is, the area between the supply edge and the energy-sufficient boundary of the anticline reservoir is used as the energy-sufficient region of the anticline reservoir.

[0070] Therefore, by defining the energy-deficient region of the anticline reservoir as the area determined by the energy-sufficient boundary as the regional radius; determining the regional area of ​​the anticline reservoir based on the supply edge radius; and defining the energy-sufficient region of the anticline reservoir as the difference between the regional area and the energy-deficient region, the energy-sufficient range of the anticline reservoir can be clearly determined.

[0071] The technical solution of this invention involves determining geological and development data for anticline reservoirs; determining at least one annular well row based on the supply edge radius in the geological data, the well spacing in the development data, and the number of wells in each annular well row; determining the bottomhole flowing pressure of each annular well row based on the geological data, development data, and the bottomhole flowing pressure threshold in the development data; and determining the energy sufficiency limit of the anticline reservoir based on the bottomhole flowing pressure and the bottomhole flowing pressure threshold in the development data. By implementing the solution provided by this invention, it is possible to accurately determine whether a reservoir can be fully developed using natural energy and to clarify the range of energy insufficiency in the reservoir.

[0072] To more clearly illustrate the technical solution of the present invention, the method for determining the energy sufficiency limit of an anticline reservoir in the embodiments of the present invention may include the following steps:

[0073] Step 1: Determine the geological and development data of the anticline reservoir.

[0074] Step 2: Determine at least one annular well row data based on the supply edge radius in the geological data, the well row spacing in the development data, and the number of wells in each annular well row.

[0075] Step 3, determining the bottom hole flowing pressure of each annular well row according to the geological data, development data and each annular well row data.

[0076] Step 4, determining the energy sufficient boundary of the anticline reservoir based on the bottom hole flowing pressure and the bottom hole flowing pressure threshold in the development data.

[0077] Step 5, determining the energy sufficient area of the anticline reservoir according to the energy sufficient boundary.

[0078] Exemplarily, the scheme takes a typical marine sandstone reservoir in A oilfield as an example, but a main fault develops in the south of the oilfield, which complicates the oil reservoir into a faulted anticline reservoir, but it can be regarded as a part of the complete anticline reservoir. The representative reservoir parameters of the oilfield are selected for illustration. The geological data of the typical reservoir in A oilfield is shown in Table 2:

[0079] Table 2

[0080] reservoir supply edge radius, r e (m)]]> 3000 Radius of oil-water contact within the reservoir, (m) 2400 Reservoir permeability, k (mD) 7000 Reservoir thickness, h (m) 9 Formation crude oil viscosity, μ (mPa-s) 110 Formation pressure, p, at the reservoir supply edge e (MPa) 13.76

[0081] Based on the above geological basic parameters of the typical reservoir in A oilfield, in order to effectively develop the reserves outside the inner oil-water contact surface, the wells are arranged from the inner oil-water contact surface (with a radius of 2400 m), the row spacing is selected as 400 m, the uniform annular well row is arranged, and one oil well is arranged at the center of the reservoir. In order to facilitate the example and simplify the calculation, the well spacing of each annular well row is 419 m, the bottom hole radius is 0.1 m, and the single well target production is 23.85 m 3 / d. Due to the sand production of the reservoir, the minimum bottom hole flowing pressure (bottom hole flowing pressure threshold) allowed by all the production wells in the normal production of the reservoir is 10.2 MPa. The annular well pattern design and production control parameter table of the typical reservoir in A oilfield is shown in Table 3:

[0082] Table 3

[0083]

[0084]

[0085] The bottom hole flowing pressure of each well row is calculated by using the method when the target production of the oil well is 23.85 m 3 / d. The bottom hole flowing pressure of each well row of the annular well pattern of the typical reservoir in A oilfield is shown in Table 4:

[0086] Table 4

[0087] Well row Row 1 Row 2 Row 3 Row 4 Row 5 Row 6 Row 7 Annular radius of the annular well row, (m) 2400 2000 1600 1200 800 400 400 Bottom hole flowing pressure of this well row, (MPa) 11.05 9.76 8.70 7.88 7.28 6.90 6.76

[0088] As can be seen from Table 4, the bottom hole flowing pressures of the well rows from the 2nd row and the subsequent rows are all less than the minimum bottom hole flowing pressure (bottom hole flowing pressure threshold) 10.2 MPa allowed by oil well production, that is, the regions from the 2nd row to the inside of the oil reservoir are all energy deficient regions. Based on the data in Table 4, the bottom hole flowing pressure at 2200 m is 10.2 MPa by the difference calculation method, that is, the region from the supply edge of the oil reservoir to r 界限 =2200 m is a natural energy sufficient range, and the other regions are oil reservoir energy deficient regions.

[0089] The technical scheme of the embodiment of the present application is based on the abstraction or extension of the complex structure form of the actual oil reservoir to the complete anticline oil reservoir, uniformly designs the annular production well pattern, adopts the equivalent seepage resistance method in the oil reservoir engineering, and deduces the bottom hole flowing pressure calculation equation of each well row under the arbitrary multiple well rows. Compared with other methods, the oil reservoir energy sufficient limit can be quickly determined. Meanwhile, the method is verified by the oil reservoir numerical model and the actual production dynamic. The method can determine whether the oil reservoir can be completely developed by relying on the natural energy, clearly defines the energy deficient range of the oil reservoir, that is, the region needing water injection to supplement the energy, and has good application value for the reasonable development mode research of the marine sandstone oil field.

[0090] Figure 3 is a structural schematic diagram of a device for determining the energy sufficient limit of an anticline oil reservoir provided by the embodiment of the present application. As shown in the figure, the device includes: Figure 3 An anticline oil reservoir data determination module 310 is configured to determine the geological data and development data of the anticline oil reservoir.

[0091] An annular well row data determination module 320 is configured to determine at least one annular well row data according to the supply edge radius in the geological data, the oil well row distance in the development data, and the number of oil wells in each annular well row.

[0092] A bottom hole flowing pressure determination module 330 is configured to determine the bottom hole flowing pressure of each annular well row according to the geological data, the development data, and each annular well row data.

[0093] An energy sufficient limit determination module 340 is configured to determine the energy sufficient limit of the anticline oil reservoir based on each bottom hole flowing pressure and the bottom hole flowing pressure threshold in the development data.

[0094]

[0095] ​Optionally, the well bottom flow pressure determination module 330 comprises a differential pressure equation determination unit configured to determine differential pressure equations of well bottom flow pressures of each adjacent annular well row based on the equivalent seepage resistance method; a differential pressure equation set determination unit configured to combine each differential pressure equation to obtain a differential pressure equation set; and a well bottom flow pressure determination unit configured to input the geological data, the development data, and the annular well row data into the differential pressure equation set to obtain the well bottom flow pressures of each annular well row; wherein the geological data comprises reservoir thickness, reservoir permeability, formation crude oil viscosity, and formation pressure at the supply edge of the anticline reservoir; the development data comprises a target oil production of the oil well; and the annular well row data comprises an oil well spacing, a well bottom radius, and an annular radius of the annular well row.

[0096] Optionally, the energy sufficient limit determination module 340 comprises a target well bottom flow pressure determination unit configured to determine a well bottom flow pressure identical to the well bottom flow pressure threshold value as a target well bottom flow pressure from the well bottom flow pressures; a target annular well row determination unit configured to determine a target annular well row associated with the target well bottom flow pressure; a first energy sufficient limit determination unit configured to determine an annular radius of the target annular well row according to the annular well row data, and determine the annular radius of the target annular well row as the energy sufficient limit of the anticline reservoir.

[0097] Optionally, the energy sufficient limit determination module 340 comprises a regression result determination unit configured to, if it is determined that there is no well bottom flow pressure identical to the well bottom flow pressure threshold value among the well bottom flow pressures, perform regression calculation on the annular radii and the well bottom flow pressures of each annular well row to obtain a regression result; a target radius determination unit configured to process the regression result based on the difference calculation method to obtain a target radius corresponding to the well bottom flow pressure threshold value; and a second energy sufficient limit determination unit configured to determine the target radius as the energy sufficient limit of the anticline reservoir.

[0098] Optionally, the device further comprises an energy sufficient area determination module configured to, after determining the energy sufficient limit of the anticline reservoir based on the well bottom flow pressures and the well bottom flow pressure threshold value in the development data, determine an energy sufficient area of the anticline reservoir according to the energy sufficient limit.

[0099] Optionally, the energy sufficient area determination module comprises an energy insufficient area determination unit configured to determine an area of the anticline reservoir as an energy insufficient area with the area radius being the energy sufficient limit; an area area determination unit configured to determine an area of the anticline reservoir according to the supply edge radius; and an energy sufficient area determination unit configured to determine a difference between the area of the anticline reservoir and the energy insufficient area as the energy sufficient area of the anticline reservoir.

[0100] The device for determining the energy sufficient limit of the backfolding oil reservoir provided by the embodiment of the present application can execute the method for determining the energy sufficient limit of the backfolding oil reservoir provided by any embodiment of the present application, and has the corresponding function modules and beneficial effects of executing the method.

[0101] Figure 4 A structural schematic diagram of an electronic device 40 that can be used to implement embodiments of the present application is shown. The electronic device is intended to represent various forms of digital computers, such as laptops, desktops, tablets, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular telephones, smart phones, wearable devices (e.g., headsets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be examples only, and are not meant to limit implementations of the present application described and / or claimed in this document.

[0102] As shown in Figure 4 The electronic device 40 includes at least one processor 41, and a memory, such as a read-only memory (ROM) 42, a random access memory (RAM) 43, etc., which is communicatively connected to the at least one processor 41, wherein the memory stores a computer program that can be executed by the at least one processor. The processor 41 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 42 or the computer program loaded from the storage unit 48 into the random access memory (RAM) 43. In the RAM 43, various programs and data required for the operation of the electronic device 40 can also be stored. The processor 41, the ROM 42, and the RAM 43 are connected to each other through a bus 44. An input / output (I / O) interface 45 is also connected to the bus 44.

[0103] Various components in the electronic device 40 are connected to the I / O interface 45, including an input unit 46, such as a keyboard, a mouse, etc.; an output unit 47, such as various types of displays, a speaker, etc.; a storage unit 48, such as a magnetic disk, an optical disk, etc.; and a communication unit 49, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 49 allows the electronic device 40 to exchange information / data with other devices through a computer network, such as the Internet, and / or various telecommunication networks.

[0104] The processor 41 can be various general-purpose and / or special-purpose processing components having processing and computing capabilities. Some examples of the processor 41 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various specialized artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 41 performs various methods and processes described above, such as the method of determining the energy-sufficient limit of an anticline oil reservoir.

[0105] In some embodiments, the method of determining the energy-sufficient limit of an anticline oil reservoir can be implemented as a computer program tangibly embodied in a computer readable storage medium, such as the storage unit 48. In some embodiments, part or all of the computer program can be loaded and / or installed onto the electronic device 40 via the ROM 42 and / or the communication unit 49. When the computer program is loaded onto the RAM 43 and executed by the processor 41, one or more steps of the method of determining the energy-sufficient limit of an anticline oil reservoir described above can be performed. Alternatively, in other embodiments, the processor 41 can be configured to perform the method of determining the energy-sufficient limit of an anticline oil reservoir by any other appropriate means, such as by means of firmware.

[0106] The various implementations of the systems and techniques described above can be realized in a digital electronic circuit system, an integrated circuit system, a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on a chip (SOC), a computer hardware, firmware, software, and / or combinations thereof. These various implementations can include implementation in one or more computer programs that are executable and / or interpretable on a programmable system including at least one programmable processor, which can be special or general purpose, coupled to receive data and instructions from, and to transmit data and instructions to, a storage system, at least one input device, and at least one output device.

[0107] Computer programs used to implement the methods of the application can be written in any combination of one or more programming languages. These computer programs can be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the computer program, when executed by the processor of the machine, implements the functions / acts specified in the flowcharts and / or block diagrams. The computer program can be executed entirely on a machine, partially on a machine, partially on a machine as a stand-alone software package, partially on a machine and partially on a remote machine or entirely on a remote machine or server.

[0108] In the context of the present application, a computer-readable storage medium can be a tangible medium that can contain or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer-readable storage medium can include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium can be a machine-readable signal medium. More specific examples of a machine-readable storage medium will include one or more lines of a program of instructions in a transitory signal, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0109] To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user and a keyboard and a pointing device (e.g., a mouse or a trackball) by which the user can provide input to the electronic device. Other kinds of devices can be used to provide for interaction with a user as well; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form, including acoustic, speech, or tactile input.

[0110] The systems and techniques described here can be implemented in a computing system that includes a back end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front end component (e.g., a user computer having a graphical user interface or a Web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back end, middleware, or front end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network (LAN), a wide area network (WAN), blockchain network, and the Internet.

[0111] The computing system can include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system, to solve the defects of large management difficulty and weak business scalability in traditional physical host and VPS service.

[0112] It should be understood that the various forms of flow shown above can be used to reorder, add or delete steps. For example, each step described in the present application can be executed in parallel, sequentially or in a different order, as long as the desired results of the technical solutions of the present application can be achieved, which is not limited herein.

[0113] The above detailed description does not constitute a limitation on the scope of protection of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A method for determining the energy sufficiency limit of an anticlinal oil reservoir, characterized by, The method comprises the following steps: determining geological data and development data of the anticline reservoir; determining at least one ring-shaped well row data according to the supply edge radius in the geological data, the well row spacing in the development data and the number of oil wells in each ring-shaped well row; determining the bottom hole flowing pressure of each ring-shaped well row according to the geological data, the development data and each ring-shaped well row data; determining the energy sufficient boundary of the anticline reservoir based on each bottom hole flowing pressure and a bottom hole flowing pressure threshold in the development data; determining the bottom hole flowing pressure of each ring-shaped well row according to the geological data, the development data and each ring-shaped well row data, comprising: determining a differential equation of the bottom hole flowing pressure of each adjacent ring-shaped well row based on an equivalent seepage resistance method; combining each differential equation to obtain a differential equation set; inputting the geological data, the development data and each ring-shaped well row data into the differential equation set to obtain the bottom hole flowing pressure of each ring-shaped well row; the geological data comprises reservoir thickness, reservoir permeability, formation crude oil viscosity and formation pressure at the supply edge of the anticline reservoir; the development data comprises a target oil production of the oil well; the ring-shaped well row data comprises the well spacing of the ring-shaped well row, the bottom hole radius and the ring radius of the ring-shaped well row; determining the energy sufficient boundary of the anticline reservoir based on each bottom hole flowing pressure and a bottom hole flowing pressure threshold, comprising: taking the same bottom hole flowing pressure as the bottom hole flowing pressure threshold as a target bottom hole flowing pressure from each bottom hole flowing pressure; determining a target ring-shaped well row associated with the target bottom hole flowing pressure; determining the ring radius of the target ring-shaped well row according to the ring-shaped well row data and taking the ring radius of the target ring-shaped well row as the energy sufficient boundary of the anticline reservoir; determining the energy sufficient boundary of the anticline reservoir based on each bottom hole flowing pressure and a bottom hole flowing pressure threshold, comprising: if it is determined that there is no bottom hole flowing pressure same as the bottom hole flowing pressure threshold in each bottom hole flowing pressure, performing regression calculation on the ring radius and the bottom hole flowing pressure of each ring-shaped well row to obtain a regression result; processing the regression result based on a difference calculation method to obtain a target radius corresponding to the bottom hole flowing pressure threshold; taking the target radius as the energy sufficient boundary of the anticline reservoir.

2. The method of claim 1, wherein, After determining the energy sufficient boundary of the anticline reservoir based on each bottom hole flowing pressure and a bottom hole flowing pressure threshold in the development data, the method further comprises: determining an energy sufficient area of the anticline reservoir according to the energy sufficient boundary.

3. The method of claim 2, wherein, Determining an energy sufficient area of the anticline reservoir according to the energy sufficient boundary, comprising: determining an area of the energy insufficient area as the area radius by the energy sufficient boundary; determining the area of the anticline reservoir according to the supply edge radius; taking the difference between the area and the energy insufficient area as the energy sufficient area of the anticline reservoir.

4. An apparatus for determining the energy sufficiency limit of an anticline oil reservoir, characterized by, The method comprises the following steps: determining geological data and development data of the anticline reservoir by an anticline reservoir data determination module; The annular well row data determination module is configured to determine at least one annular well row data based on a supply edge radius in the geological data, a well row spacing in the development data, and a number of oil wells in each annular well row; The bottom-hole flowing pressure determination module is configured to determine a bottom-hole flowing pressure of each annular well row based on the geological data, the development data, and each annular well row data; The energy sufficient limit determination module is configured to determine an energy sufficient limit of the anticline reservoir based on each bottom-hole flowing pressure and a bottom-hole flowing pressure threshold in the development data; The bottom-hole flowing pressure determination module includes a differential pressure equation determination unit configured to determine a differential pressure equation of the bottom-hole flowing pressure of each adjacent annular well row based on an equivalent seepage resistance method; The differential pressure equation set determination unit is configured to combine each differential pressure equation to obtain a differential pressure equation set; The bottom-hole flowing pressure determination unit is configured to input the geological data, the development data, and each annular well row data into the differential pressure equation set to obtain the bottom-hole flowing pressure of each annular well row; the geological data includes a reservoir thickness, a reservoir permeability, a formation crude oil viscosity, and a formation pressure at the supply edge of the anticline reservoir; the development data includes a target oil production of the oil well; and the annular well row data includes an inter-well spacing, a bottom-hole radius of the annular well row, and an annular radius of the annular well row; The energy sufficient limit determination module includes a target bottom-hole flowing pressure determination unit configured to determine a target bottom-hole flowing pressure as a bottom-hole flowing pressure same as the bottom-hole flowing pressure threshold among each bottom-hole flowing pressure; a target annular well row determination unit configured to determine a target annular well row associated with the target bottom-hole flowing pressure; and a first energy sufficient limit determination unit configured to determine an annular radius of the target annular well row according to the annular well row data, and determine the annular radius of the target annular well row as the energy sufficient limit of the anticline reservoir; The energy sufficient limit determination module includes a regression result determination unit configured to, if it is determined that there is no bottom-hole flowing pressure same as the bottom-hole flowing pressure threshold among each bottom-hole flowing pressure, perform regression calculation on the annular radius and the bottom-hole flowing pressure of each annular well row to obtain a regression result; A target radius determination unit is configured to process the regression result based on a difference calculation method to obtain a target radius corresponding to the bottom-hole flowing pressure threshold; and a second energy sufficient limit determination unit is configured to determine the target radius as the energy sufficient limit of the anticline reservoir.

5. An electronic device, comprising: The electronic device includes: at least one processor; and a memory connected to the at least one processor in communication; wherein the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to perform the method for determining the energy sufficient limit of the anticline reservoir according to any one of claims 1-3.

6. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer instructions for causing the processor to perform the method for determining the energy sufficient limit of the anticline reservoir according to any one of claims 1-3 when executed.

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