Well control area determining method and device, equipment and medium

Abstract

The invention provides a well control area determination method and device, equipment and a medium. The method comprises the steps that a multi-well permeability contour map corresponding to a target area is obtained; determining the permeability value of each single well based on the position coordinate of each single well in the multi-well permeability contour map and the permeability contour line carried in the multi-well permeability contour map; in the multi-well permeability contour map, fluid conduction in the oil-gas-bearing area boundary is carried out on the multiple single wells at the same time through the permeability value of each single well, and the single well control area corresponding to each single well is determined; and summing the single well control areas corresponding to the plurality of single wells to determine the total well control area in the target area. Through the method and the device, the well control area is determined more reasonably, more quickly and more accurately, and the accuracy of the determined well control area is improved.

Description

Technical Field

[0001] The present application relates to the technical field of oil and gas exploration, and in particular to a method, device, equipment and medium for determining a well control area. Background Art

[0002] Oil and gas reserves are the core assets of oil companies and an important indicator of their healthy development potential. Therefore, accurate calculation of reserves has also received great attention. The effective thickness, effective porosity and oil and gas saturation of single wells and calculation units are extremely important parameters in reserve calculation, which are related to the accuracy and reliability of reserve calculation. There are three main methods for calculating the effective thickness, effective porosity and oil and gas saturation of calculation units: the well point arithmetic average method, the well point area trade-off method and the contour area trade-off method. Among them, the well point area trade-off method is one of the effective methods for finely characterizing the distribution characteristics of parameters, but this method requires accurate estimation of the well control area, and then the parameter value calculated by the well control area weighted method is the reserve parameter value calculated by the well point area trade-off method.

[0003] At present, when using the well point area trade-off method to calculate reserve parameters, a purely geometric well control area splitting method or a manual delineation method is usually used. The biggest problem with the former is that it does not consider the key impact of oil and gas reservoir parameters on the well control area. The well control area is based only on geometric information and ignores the heterogeneity of the reservoir, making it difficult to split reasonably. Although the latter can incorporate expert experience, it is highly subjective and arbitrary, and the workload is huge and the work efficiency is low. Therefore, how to improve the efficiency and accuracy of the method for determining the well control area has become a technical issue that cannot be underestimated. Summary of the invention

[0004] In view of this, the purpose of this application is to provide a method, device, equipment and medium for determining the well control area, using the permeability value of each single well in the multi-well permeability contour map for fluid conduction to determine the single well control area corresponding to each single well, and then determine the total well control area. Comprehensively considering the key influence of the permeability factor of reservoir heterogeneity on the well control area, the well control area is determined more reasonably, faster and more accurately, and the accuracy of the determined well control area is improved.

[0005] In a first aspect, an embodiment of the present application provides a method for determining a well control area, the method comprising:

[0006] Acquire a multi-well permeability contour map corresponding to the target area; wherein the multi-well permeability contour map includes an oil and gas area boundary and position coordinates of multiple single wells located within the oil and gas area boundary;

[0007] Determine the permeability value of each single well based on the position coordinates of each single well in the multi-well permeability contour map and the permeability contour lines carried in the multi-well permeability contour map;

[0008] In the multi-well permeability contour map, the permeability value of each single well is used to simultaneously conduct fluid conduction within the boundary of the oil and gas bearing area for multiple single wells to determine the single well control area corresponding to each single well;

[0009] The single well control areas corresponding to the multiple single wells are summed up to determine the total well control area in the target area.

[0010] Furthermore, after obtaining the multi-well permeability contour map, the determination method further includes:

[0011] Uniformly gridding the area within the boundary of the oil and gas-bearing area in the multi-well permeability contour map to obtain a plurality of grids within the boundary of the oil and gas-bearing area;

[0012] Based on the position coordinates of each single well in the multi-well permeability contour map, a single well grid corresponding to each single well is determined from the multiple grids.

[0013] Further, the method of determining the permeability value of each single well based on the position coordinates of each single well in the multi-well permeability contour map and the permeability contour lines carried in the multi-well permeability contour map includes:

[0014] For each single well, taking the single well grid corresponding to the single well as the origin, a ray is drawn in a preset direction to obtain multiple rays corresponding to the single well;

[0015] For each ray, determine, from a plurality of grids within the boundary of the oil and gas bearing area, a target grid through which the permeability contour line and the ray pass simultaneously and which is closest to the single well grid;

[0016] Based on the distance between each target grid and the single well grid, and the permeability value corresponding to each target grid, the permeability value of the single well is determined.

[0017] Furthermore, the permeability value of each single well in the multi-well permeability contour map is used to simultaneously conduct fluid conduction within the boundary of the oil and gas bearing area for multiple single wells to determine the single well control area corresponding to each single well, including:

[0018] Determine the fluid flow velocity corresponding to each single well based on the fluid viscosity, the fluid flow pressure value, the preset flow distance and the permeability value of each single well;

[0019] Draw a preset number of single-well streamlines outwards with the single-well grid corresponding to each single well as the center;

[0020] For each single well, based on the fluid flow velocity corresponding to the single well, the fluid is simultaneously conducted outwards within a preset flow time along multiple single well streamlines of the single well, and the grids through which the fluid flows are marked to obtain the marked grid corresponding to the single well;

[0021] Determining whether all grids within the boundary of the oil and gas bearing area are marked;

[0022] If not, return to the step of conducting the fluid outwards within a preset flow time along multiple single well streamlines of each single well based on the fluid flow velocity corresponding to the single well, and marking the grids through which the fluid flows;

[0023] If so, the single well control area corresponding to each single well is determined based on the number of marked grids corresponding to each single well and the actual area corresponding to each grid.

[0024] Furthermore, when the fluid is conducted outwards within a preset flow time simultaneously along multiple single well streamlines of the single well based on the fluid flow velocity corresponding to the single well, the determination method further includes:

[0025] For each single well streamline, when the fluid along the single well streamline flows to the marked grids corresponding to other single wells, or when the fluid along the single well streamline flows to the boundary of the oil and gas containing area, the fluid conduction along the single well streamline is stopped.

[0026] In a second aspect, an embodiment of the present application further provides a device for determining a well control area, the device comprising:

[0027] A contour map acquisition module is used to acquire a multi-well permeability contour map corresponding to a target area; wherein the multi-well permeability contour map includes an oil and gas area boundary and position coordinates of a plurality of single wells located within the oil and gas area boundary;

[0028] A permeability value determination module, used to determine the permeability value of each single well based on the position coordinates of each single well in the multi-well permeability contour map and the permeability contour lines carried in the multi-well permeability contour map;

[0029] A single well control area determination module is used to use the permeability value of each single well in the multi-well permeability contour map to simultaneously conduct fluid within the oil and gas area boundary for multiple single wells to determine the single well control area corresponding to each single well;

[0030] The total well-controlled area determination module is used to sum up the single-well controlled areas corresponding to multiple single wells to determine the total well-controlled area in the target area.

[0031] Furthermore, the determining device further comprises a grid division module. After obtaining the multi-well permeability contour map, the grid division module is used to:

[0032] Uniformly gridding the area within the boundary of the oil and gas-bearing area in the multi-well permeability contour map to obtain a plurality of grids within the boundary of the oil and gas-bearing area;

[0033] Based on the position coordinates of each single well in the multi-well permeability contour map, a single well grid corresponding to each single well is determined from the multiple grids.

[0034] Further, when the permeability value determination module is used to determine the permeability value of each single well based on the position coordinates of each single well in the multi-well permeability contour map and the permeability contour lines carried in the multi-well permeability contour map, the permeability value determination module is also used to:

[0035] For each single well, taking the single well grid corresponding to the single well as the origin, a ray is drawn in a preset direction to obtain multiple rays corresponding to the single well;

[0036] For each ray, determine, from a plurality of grids within the boundary of the oil and gas bearing area, a target grid through which the permeability contour line and the ray pass simultaneously and which is closest to the single well grid;

[0037] Based on the distance between each target grid and the single well grid, and the permeability value corresponding to each target grid, the permeability value of the single well is determined.

[0038] In a third aspect, an embodiment of the present application further provides an electronic device, comprising: a processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor communicates with the memory via the bus, and when the machine-readable instructions are executed by the processor, the steps of the method for determining the well control area as described above are performed.

[0039] In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of the method for determining the well control area as described above are executed.

[0040] A method, device, equipment and medium for determining a well control area provided in an embodiment of the present application include: first, obtaining a multi-well permeability contour map corresponding to a target area; then, determining the permeability value of each single well based on the position coordinates of each single well in the multi-well permeability contour map and the permeability contour lines carried in the multi-well permeability contour map; using the permeability value of each single well in the multi-well permeability contour map to simultaneously conduct fluid within the boundary of the oil and gas containing area for multiple single wells, to determine the single well control area corresponding to each single well; finally, summing the single well control areas corresponding to multiple single wells to determine the total well control area within the target area.

[0041] This application uses the permeability value of each single well in the multi-well permeability contour map for fluid conduction to determine the single well control area corresponding to each single well, and then determine the total well control area. Comprehensively considering the key impact of the permeability factor of reservoir heterogeneity on the well control area, the well control area is determined more reasonably, faster and more accurately without human intervention, which improves the accuracy of the determined well control area, and then provides more reasonable and accurate well control area parameters for the calculation of oil and gas reserve parameters using the well point area trade-off method.

[0042] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0044] Figure 1 A flow chart of a method for determining a well control area provided in an embodiment of the present application;

[0045] Figure 2 One of the structural schematic diagrams of a device for determining a well control area provided in an embodiment of the present application;

[0046] Figure 3 A second structural schematic diagram of a device for determining a well control area provided in an embodiment of the present application;

[0047] Figure 4 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0048] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application usually described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, each other embodiment obtained by those skilled in the art without making creative work belongs to the scope of protection of the present application.

[0049] First, the application scenarios to which the present application is applicable are introduced. The present application can be applied in the field of oil and gas exploration technology.

[0050] Oil and gas reserves are the core assets of oil companies and an important indicator of their healthy development potential. Therefore, the accurate calculation of reserves has also been highly valued, and a large amount of manpower, material and financial resources are invested in it every year. There are various types of oil and gas reserves, including new (predicted reserves, controlled reserves, proved reserves) reserve calculation, reserve recalculation, reserve accounting, reserve calibration and settlement, and SEC reserve estimation. The technical requirements and emphases are different. The calculation accuracy control nodes are numerous and wide-ranging (including calculation models, calculation parameters, and technical methods, etc.). If the calculation accuracy of any node is not well controlled, error transmission will occur, resulting in poor reserve calculation accuracy. Therefore, it is difficult to accurately calculate reserves.

[0051] The effective thickness, effective porosity and oil and gas saturation of single wells and calculation units are extremely important parameters in reserve calculation, which are related to the accuracy and reliability of reserve calculation. There are three main methods for calculating the effective thickness, effective porosity and oil and gas saturation of calculation units: well point arithmetic average method, well point area trade-off method and contour area trade-off method. Among them, the well point area trade-off method is one of the effective methods for finely characterizing the distribution characteristics of parameters, but this method requires accurate estimation of the well control area, and then the parameter value calculated by the well control area weighted method is the reserve parameter value calculated by the well point area trade-off method.

[0052] At present, when using the well point area trade-off method to calculate reserve parameters, a purely geometric well control area splitting method or a manual delineation method is usually used. The biggest problem with the former is that it does not consider the key impact of oil and gas reservoir parameters on the well control area. The well control area is based only on geometric information and ignores the heterogeneity of the reservoir, making it difficult to split reasonably. Although the latter can incorporate expert experience, it is highly subjective and arbitrary, and the workload is huge and the work efficiency is low. This will bring three problems. First, it is difficult to ensure accuracy, because the accuracy of manual delineation is poor, and the resulting errors directly affect the calculation accuracy of related reserve parameters, and important factors such as the heterogeneity of reservoir parameters that affect the well control area are not considered, making it difficult to make the calculation results reasonable; second, the workload is huge; third, manual delineation cannot automatically transmit the changes in reserves to the entire reserve calculation process, resulting in a broken chain of data transmission, which makes it impossible to realize the automation and intelligence of reserve calculation. Therefore, how to improve the efficiency and accuracy of the method for determining the well control area has become a technical issue that cannot be underestimated.

[0053] Based on this, an embodiment of the present application provides a method for determining the well control area, which determines the well control area more reasonably, faster and more accurately, improves the accuracy of the determined well control area, and solves the problems of low efficiency in determining the well control area and low accuracy of the determined well control area in the prior art.

[0054] See also Figure 1 , Figure 1 A flow chart of a method for determining a well control area provided in an embodiment of the present application. Figure 1 As shown in , the determination method provided in the embodiment of the present application includes:

[0055] S101, obtaining a multi-well permeability contour map corresponding to a target area.

[0056] It should be noted that the target area refers to the area where oil and gas exploration is conducted. The multi-well permeability contour map is a contour map drawn based on the permeability contours in the target area. Here, the multi-well permeability contour map includes the boundary of the oil and gas area and the position coordinates of multiple single wells located within the boundary of the oil and gas area. When determining the well control area, the well control area corresponding to the area within the boundary of the oil and gas area can be calculated.

[0057] Regarding the above step S101, during specific implementation, a pre-drawn multi-well permeability contour map corresponding to the target area is obtained.

[0058] As an optional embodiment, after obtaining the multi-well permeability contour map in the above step S101, the determination method further includes:

[0059] A: In the multi-well permeability contour map, the area within the boundary of the oil and gas area is uniformly gridded to obtain multiple grids within the boundary of the oil and gas area.

[0060] For the above step A, in the specific implementation, after obtaining the multi-well permeability contour map, the area within the boundary of the oil and gas area is divided into uniform rectangular grids in the multi-well permeability contour map, and the area within the boundary of the oil and gas area is divided into rectangles of the same size to obtain multiple grids within the boundary of the oil and gas area.

[0061] B: Based on the position coordinates of each single well in the multi-well permeability contour map, the single well grid corresponding to each single well is determined from the multiple grids.

[0062] Regarding the above step B, during the specific implementation, since there are multiple single well position coordinates in the multi-well permeability contour map, therefore, for each single well, determine in which grid the position coordinates of the single well are located in the multi-well permeability contour map, and determine the grid where the position coordinates of the single well are located as the single well grid corresponding to the single well.

[0063] S102, determining the permeability value of each single well based on the position coordinates of each single well in the multi-well permeability contour map and the permeability contour lines carried in the multi-well permeability contour map.

[0064] For the above step S102, in the specific implementation, a permeability value is assigned to each single well, and the permeability value of each single well is determined according to the position coordinates of each single well in the multi-well permeability contour map and the permeability contour lines carried in the multi-well permeability contour map. In this way, the key influence of the permeability factor of reservoir heterogeneity on the well control area can be comprehensively considered by calculating the permeability value of each single well. Here, there are many ways to assign values. For example, the contour line value can be assigned to the grid through which the contour line passes, or the eight-way linear interpolation averaging method can be used. The present application uses the eight-way linear interpolation averaging method when assigning permeability values ​​to single wells.

[0065] As an optional embodiment, for the above step S102, determining the permeability value of each single well based on the position coordinates of each single well in the multi-well permeability contour map and the permeability contour lines carried in the multi-well permeability contour map includes:

[0066] Step 1021 , for each single well, taking the single well grid corresponding to the single well as the origin, drawing rays in a preset direction to obtain multiple rays corresponding to the single well.

[0067] Here, the preset directions are eight directions of 0 degree, 45 degree, 90 degree, 135 degree, 180 degree, 225 degree, 270 degree and 315 degree.

[0068] For the above step 1021, in the specific implementation, for each single well, with the single well grid corresponding to the single well as the origin, rays are drawn in eight directions of 0 degrees, 45 degrees, 90 degrees, 135 degrees, 180 degrees, 225 degrees, 270 degrees and 315 degrees to obtain eight rays corresponding to the single well.

[0069] Step 1022: for each ray, determine, from the multiple grids within the boundary of the oil and gas bearing area, a target grid through which the permeability contour line and the ray pass simultaneously and which is closest to the single well grid.

[0070] For the above step 1022, in the specific implementation, there are multiple permeability contour lines in the multi-well permeability contour line map. For each ray emitted from the single well grid of the single well, determine the grid through which the permeability contour line and the ray pass at the same time. When there is only one grid that passes at the same time, the grid is used as the target grid. When there are multiple grids that pass at the same time, the grid closest to the single well grid is used as the target grid. Since 8 rays are drawn in step 1021, 8 target grids located around the single well grid can be determined.

[0071] Step 1023, based on the distance between each target grid and the single well grid, and the permeability value corresponding to each target grid, determine the permeability value of the single well.

[0072] Regarding the above step 1023, in the specific implementation, after the target grid is determined, the permeability value of the single well can be calculated based on the distance between each target grid and the single well grid, and the permeability value corresponding to each target grid. Specifically, let G i，j is a single well grid, and the target grids on the 8 rays that intersect with the permeability contour lines are G0, G1, ..., G8, and linear interpolation is performed according to the distance from the single well grid to the 8 target grids. Here, taking G0 and G1 as examples, Among them, X0 is the permeability value corresponding to the G0 grid, X1 is the permeability value corresponding to the G1 grid, and L0 is the permeability value corresponding to the G i，j The distance to G0, L1 is G i，j The distance to G1. The values ​​of other directions are the same as above, and we can get X 2，3 , X 4，5 and X 6，7 Finally, the permeability value of a single well can be obtained by taking the average value, that is, Where X i，j is the permeability value of a single well.

[0073] S103, using the permeability value of each single well in the multi-well permeability contour map to simultaneously conduct fluid within the boundary of the oil and gas bearing area for multiple single wells, and determine the single well control area corresponding to each single well.

[0074] Regarding the above step S103, in the specific implementation, after the permeability value of each single well is determined, the permeability value of each single well is used in the multi-well permeability contour map to simultaneously conduct fluid within the oil and gas area boundary of multiple single wells, so as to determine the single well control area corresponding to each single well.

[0075] As an optional embodiment, for the above step S103, the permeability value of each single well in the multi-well permeability contour map is used to simultaneously conduct fluid within the boundary of the oil and gas bearing area for multiple single wells to determine the single well control area corresponding to each single well, including:

[0076] Step 1031, determining the fluid flow velocity corresponding to each single well based on the fluid viscosity, the fluid flow pressure value, the preset flow distance and the permeability value of each single well.

[0077] For the above step 1031, in the specific implementation, based on Darcy's law, for each single well, the fluid flow velocity corresponding to the single well is determined using the preset fluid viscosity, fluid flow pressure value, preset flow distance and the permeability value of the single well. Specifically, the fluid flow velocity is calculated by the following formula:

[0078]

[0079] Wherein, v is the fluid flow velocity m / d, K is the permeability value mD, μ is the fluid viscosity cP, ΔP is the fluid flow pressure value, and ΔL is the preset flow distance.

[0080] Step 1032, drawing a preset number of single well streamlines outwards with the single well grid corresponding to each single well as the center.

[0081] Here, the preset number is equivalent to the streamline accuracy, that is, the number of streamlines radiating outward from the single well grid as the center. When the streamline accuracy is -1, it is required that all grids must have streamlines passing through them.

[0082] Regarding the above step 1032, during the specific implementation, the single well streamlines are tracked for all the single wells respectively, and a plurality of preset number of single well streamlines are drawn outwards with the single well grid corresponding to each single well as the center.

[0083] Step 1033, for each single well, based on the fluid flow velocity corresponding to the single well, the fluid is simultaneously conducted outward within a preset flow time along multiple single well streamlines of the single well, and the grids through which the fluid flows are marked to obtain the marked grid corresponding to the single well.

[0084] With respect to the above step 1033, in the specific implementation, for each single well, based on the fluid flow velocity corresponding to the single well, the fluid is simultaneously conducted outward within the preset flow time along the multiple single well streamlines of the single well, so that the fluid diffuses outward along the multiple single well streamlines with the single well grid as the center. When the fluid flows through the grid, the grid through which the fluid flows is marked to obtain the marked grid corresponding to the single well. Here, different single wells are marked with different colors for the grid. Here, specifically, when determining which grids need to be marked, for each single well streamline, the fluid flow velocity corresponding to the single well needs to be multiplied by the preset flow time to determine the distance that the fluid is conducted along the direction of the single well streamline, and the single well streamline is extended according to the distance, and all the grids passed by the single well streamline are the grids that need to be marked.

[0085] Specifically, with respect to the above step 1033, when the fluid is simultaneously conducted outward within a preset flow time along multiple single well streamlines of the single well based on the fluid flow velocity corresponding to the single well, the determination method further includes:

[0086] For each single well streamline, when the fluid along the single well streamline flows to the marked grids corresponding to other single wells, or when the fluid along the single well streamline flows to the boundary of the oil and gas containing area, the fluid conduction along the single well streamline is stopped.

[0087] Since fluid conduction is performed on multiple single wells at the same time, it is necessary to mark the grids through which the fluid of each single well passes at the same time. When the fluid flowing along a single well streamline flows into the marked grids of other single wells, or flows to the boundary of the oil and gas area, it is necessary to stop the fluid conduction along the single well streamline. With respect to the above steps, during the specific implementation, for each single well streamline, when the fluid along the single well streamline flows to the marked grids corresponding to other single wells, or the fluid along the single well streamline flows to the boundary of the oil and gas area, the fluid conduction along the single well streamline is stopped.

[0088] Step 1034, determining whether all grids within the boundary of the oil and gas bearing area are marked.

[0089] Step 1035, if not, return to execute the step of conducting the fluid outward within a preset flow time for each single well based on the fluid flow velocity corresponding to the single well, along multiple single well streamlines of the single well, and marking the grids through which the fluid flows.

[0090] Step 1036: If yes, then determine the single well control area corresponding to each single well based on the number of marked grids corresponding to each single well and the actual area corresponding to each grid.

[0091] With respect to the above steps 1034-1035, in the specific implementation, after the fluid conduction of the preset flow time is completed, it is determined whether all the grids within the boundary of the oil and gas area are marked. If all the grids within the boundary of the oil and gas area are not fully marked, it is necessary to increase the flow time of the fluid conduction, and return to execute the above step 1033, for each single well, based on the fluid flow velocity corresponding to the single well, the fluid conduction within the preset flow time is simultaneously performed outward along multiple single well streamlines of the single well, and the grids through which the fluid flows are marked. If all the grids within the boundary of the oil and gas area are marked, the single well control area corresponding to each single well is determined based on the number of marked grids corresponding to each single well and the actual area corresponding to each grid. Specifically, since the size of each grid is the same, the actual area corresponding to each grid is also the same. The actual area corresponding to the grid can be determined by dividing the size of the grid in the multi-well permeability contour map by the scale corresponding to the multi-well permeability contour map. For each single well, the number of marked grids corresponding to the single well is multiplied by the actual area of ​​the grid to determine the single well control area corresponding to the single well. In this way, taking a sufficiently small preset flow time can ensure that the flow gradually converges, and eventually all streamlines stop flowing. The sum of the areas of the grids that each single well flows through is the single well control area of ​​the single well.

[0092] S104, summing up the single well controlled areas corresponding to the multiple single wells to determine the total well controlled area in the target area.

[0093] Regarding the above step S104, in a specific implementation, after the single well control area corresponding to each single well is calculated, the single well control areas corresponding to multiple single wells are summed up to determine the total well control area in the target area.

[0094] A method for determining a well control area provided in an embodiment of the present application comprises the following steps: first, obtaining a multi-well permeability contour map corresponding to a target area; then, determining the permeability value of each single well based on the position coordinates of each single well in the multi-well permeability contour map and the permeability contour lines carried in the multi-well permeability contour map; using the permeability value of each single well in the multi-well permeability contour map to simultaneously conduct fluid conduction within the boundary of the oil and gas containing area for multiple single wells, to determine the single well control area corresponding to each single well; finally, summing the single well control areas corresponding to the multiple single wells to determine the total well control area within the target area.

[0095] This application uses the permeability value of each single well in the multi-well permeability contour map for fluid conduction to determine the single well control area corresponding to each single well, and then determine the total well control area. Comprehensively considering the key impact of the permeability factor of reservoir heterogeneity on the well control area, the well control area is determined more reasonably, faster and more accurately without human intervention, which improves the accuracy of the determined well control area, and then provides more reasonable and accurate well control area parameters for the calculation of oil and gas reserve parameters using the well point area trade-off method.

[0096] See also Figure 2 , Figure 3 , Figure 2 This is one of the structural schematic diagrams of a device for determining a well control area provided in an embodiment of the present application. Figure 3 This is a second structural diagram of a device for determining a well control area provided in an embodiment of the present application. Figure 2 As shown in , the determining device 200 includes:

[0097] The contour map acquisition module 201 is used to acquire a multi-well permeability contour map corresponding to the target area; wherein the multi-well permeability contour map includes the boundary of the oil and gas area and the position coordinates of multiple single wells located within the boundary of the oil and gas area;

[0098] A permeability value determination module 202, for determining the permeability value of each single well based on the position coordinates of each single well in the multi-well permeability contour map and the permeability contour lines carried in the multi-well permeability contour map;

[0099] A single well control area determination module 203 is used to simultaneously conduct fluid within the oil and gas bearing area boundary for multiple single wells using the permeability value of each single well in the multi-well permeability contour map to determine the single well control area corresponding to each single well;

[0100] The total well controlled area determination module 204 is used to sum up the single well controlled areas corresponding to multiple single wells to determine the total well controlled area in the target area.

[0101] Further, such as Figure 3 As shown, the determination device 200 further includes a grid division module 205. After obtaining the multi-well permeability contour map, the grid division module 205 is used to:

[0102] Uniformly gridding the area within the boundary of the oil and gas-bearing area in the multi-well permeability contour map to obtain a plurality of grids within the boundary of the oil and gas-bearing area;

[0103] Based on the position coordinates of each single well in the multi-well permeability contour map, a single well grid corresponding to each single well is determined from the multiple grids.

[0104] Further, when the permeability value determination module 202 is used to determine the permeability value of each single well based on the position coordinates of each single well in the multi-well permeability contour map and the permeability contour lines carried in the multi-well permeability contour map, the permeability value determination module 202 is also used to:

[0105] For each single well, taking the single well grid corresponding to the single well as the origin, a ray is drawn in a preset direction to obtain multiple rays corresponding to the single well;

[0106] For each ray, determine, from a plurality of grids within the boundary of the oil and gas bearing area, a target grid through which the permeability contour line and the ray pass simultaneously and which is closest to the single well grid;

[0107] Based on the distance between each target grid and the single well grid, and the permeability value corresponding to each target grid, the permeability value of the single well is determined.

[0108] Furthermore, when the single well control area determination module 203 is used to simultaneously conduct fluid within the oil and gas bearing area boundary for multiple single wells using the permeability value of each single well in the multi-well permeability contour map to determine the single well control area corresponding to each single well, the single well control area determination module 203 is also used to:

[0109] Determine the fluid flow velocity corresponding to each single well based on the fluid viscosity, the fluid flow pressure value, the preset flow distance and the permeability value of each single well;

[0110] Draw a preset number of single-well streamlines outwards with the single-well grid corresponding to each single well as the center;

[0111] For each single well, based on the fluid flow velocity corresponding to the single well, the fluid is simultaneously conducted outwards within a preset flow time along multiple single well streamlines of the single well, and the grids through which the fluid flows are marked to obtain the marked grid corresponding to the single well;

[0112] Determining whether all grids within the boundary of the oil and gas bearing area are marked;

[0113] If not, return to the step of conducting the fluid outwards within a preset flow time along multiple single well streamlines of each single well based on the fluid flow velocity corresponding to the single well, and marking the grids through which the fluid flows;

[0114] If so, the single well control area corresponding to each single well is determined based on the number of marked grids corresponding to each single well and the actual area corresponding to each grid.

[0115] Further, when the single well control area determination module 203 is used to simultaneously conduct fluid outward within a preset flow time along multiple single well streamlines of the single well based on the fluid flow velocity corresponding to the single well, the single well control area determination module 203 is also used to:

[0116] For each single well streamline, when the fluid along the single well streamline flows to the marked grids corresponding to other single wells, or when the fluid along the single well streamline flows to the boundary of the oil and gas containing area, the fluid conduction along the single well streamline is stopped.

[0117] See also Figure 4 , Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Figure 4 As shown in , the electronic device 400 includes a processor 410 , a memory 420 and a bus 430 .

[0118] The memory 420 stores machine-readable instructions executable by the processor 410. When the electronic device 400 is running, the processor 410 communicates with the memory 420 via the bus 430. When the machine-readable instructions are executed by the processor 410, the above-mentioned Figure 1 The steps of the method for determining the well controlled area in the method embodiment shown, and the specific implementation manner can be found in the method embodiment, which will not be repeated here.

[0119] 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 computer program can execute the above-mentioned Figure 1 The steps of the method for determining the well controlled area in the method embodiment shown, and the specific implementation manner can be found in the method embodiment, which will not be repeated here.

[0120] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0121] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0122] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0123] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0124] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present application can essentially be embodied in the form of a software product, or in other words, the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0125] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-mentioned embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A method for determining a well control area, characterized in that: The determination method comprises: Acquire a multi-well permeability contour map corresponding to the target area; wherein the multi-well permeability contour map includes an oil and gas area boundary and position coordinates of multiple single wells located within the oil and gas area boundary; Determine the permeability value of each single well based on the position coordinates of each single well in the multi-well permeability contour map and the permeability contour lines carried in the multi-well permeability contour map; In the multi-well permeability contour map, the permeability value of each single well is used to simultaneously conduct fluid conduction within the boundary of the oil and gas bearing area for multiple single wells to determine the single well control area corresponding to each single well; The single well control areas corresponding to the multiple single wells are summed up to determine the total well control area in the target area.

2. The determination method according to claim 1, characterized in that: After obtaining the multi-well permeability contour map, the determination method further includes: Uniformly gridding the area within the boundary of the oil and gas-bearing area in the multi-well permeability contour map to obtain a plurality of grids within the boundary of the oil and gas-bearing area; Based on the position coordinates of each single well in the multi-well permeability contour map, a single well grid corresponding to each single well is determined from the multiple grids.

3. The determination method according to claim 2, characterized in that: The method of determining the permeability value of each single well based on the position coordinates of each single well in the multi-well permeability contour map and the permeability contour lines carried in the multi-well permeability contour map comprises: For each single well, taking the single well grid corresponding to the single well as the origin, a ray is drawn in a preset direction to obtain multiple rays corresponding to the single well; For each ray, determine, from a plurality of grids within the boundary of the oil and gas bearing area, a target grid through which the permeability contour line and the ray pass simultaneously and which is closest to the single well grid; Based on the distance between each target grid and the single well grid, and the permeability value corresponding to each target grid, the permeability value of the single well is determined.

4. The determination method according to claim 2, characterized in that: The method of simultaneously conducting fluid conduction within the oil and gas containing area boundary for multiple single wells using the permeability value of each single well in the multi-well permeability contour map to determine the single well control area corresponding to each single well includes: Determine the fluid flow velocity corresponding to each single well based on the fluid viscosity, the fluid flow pressure value, the preset flow distance and the permeability value of each single well; Draw a preset number of single-well streamlines outwards with the single-well grid corresponding to each single well as the center; For each single well, based on the fluid flow velocity corresponding to the single well, the fluid is simultaneously conducted outwards within a preset flow time along multiple single well streamlines of the single well, and the grids through which the fluid flows are marked to obtain the marked grid corresponding to the single well; Determining whether all grids within the boundary of the oil and gas bearing area are marked; If not, return to the step of conducting the fluid outwards within a preset flow time along multiple single well streamlines of each single well based on the fluid flow velocity corresponding to the single well, and marking the grids through which the fluid flows; If so, the single well control area corresponding to each single well is determined based on the number of marked grids corresponding to each single well and the actual area corresponding to each grid.

5. The determination method according to claim 4, characterized in that: When the fluid is conducted outwards within a preset flow time simultaneously along multiple single well streamlines of the single well based on the fluid flow velocity corresponding to the single well, the determination method further includes: For each single well streamline, when the fluid along the single well streamline flows to the marked grids corresponding to other single wells, or when the fluid along the single well streamline flows to the boundary of the oil and gas containing area, the fluid conduction along the single well streamline is stopped.

6. A device for determining a well control area, characterized in that: The determining device comprises: A contour map acquisition module is used to acquire a multi-well permeability contour map corresponding to a target area; wherein the multi-well permeability contour map includes an oil and gas area boundary and position coordinates of a plurality of single wells located within the oil and gas area boundary; A permeability value determination module, used to determine the permeability value of each single well based on the position coordinates of each single well in the multi-well permeability contour map and the permeability contour lines carried in the multi-well permeability contour map; A single well control area determination module is used to simultaneously conduct fluid within the oil and gas containing area boundary for multiple single wells using the permeability value of each single well in the multi-well permeability contour map to determine the single well control area corresponding to each single well; The total well-controlled area determination module is used to sum up the single-well controlled areas corresponding to multiple single wells to determine the total well-controlled area in the target area.

7. The determination device according to claim 6, characterized in that: The determining device further comprises a grid division module, which is used to: Uniformly gridding the area within the boundary of the oil and gas-bearing area in the multi-well permeability contour map to obtain a plurality of grids within the boundary of the oil and gas-bearing area; Based on the position coordinates of each single well in the multi-well permeability contour map, a single well grid corresponding to each single well is determined from the multiple grids.

8. The determination device according to claim 7, characterized in that: When the permeability value determination module is used to determine the permeability value of each single well based on the position coordinates of each single well in the multi-well permeability contour map and the permeability contour lines carried in the multi-well permeability contour map, the permeability value determination module is also used to: For each single well, taking the single well grid corresponding to the single well as the origin, a ray is drawn in a preset direction to obtain multiple rays corresponding to the single well; For each ray, determine, from a plurality of grids within the boundary of the oil and gas bearing area, a target grid through which the permeability contour line and the ray pass simultaneously and which is closest to the single well grid; Based on the distance between each target grid and the single well grid, and the permeability value corresponding to each target grid, the permeability value of the single well is determined.

9. An electronic device, characterized in that: include: A processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor and the memory communicate through the bus, and the machine-readable instructions are executed by the processor to execute the steps of the method for determining the well control area as described in any one of claims 1 to 5.

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 method for determining the well-controlled area according to any one of claims 1 to 5 are executed.

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