Injection-production flow field comprehensive characterization method and device, medium and electronic equipment

Abstract

The invention discloses an injection-production flow field comprehensive characterization method and device, a medium and electronic equipment. The method comprises the steps that injection-production relation characterization is achieved by determining a center water injection well, searching a distance and searching an included angle; the coordinates of all oil-water wells are obtained by determining the coordinates of the center water injection well, and therefore division characterization of the injection-production control area is achieved; according to the reservoir numerical simulation geologic model, the remaining oil saturation field and the pressure field, the displacement strength and the displacement degree are determined, and therefore plane characterization is achieved; the method comprises the following steps: determining main flow line profile characterization, non-main flow line profile characterization and inter-well profile characterization by acquiring coordinates of a central water injection well and coordinates of an oil-water well, so as to determine inter-well profile characterization; based on injection-production relation characterization, injection-production control area division characterization, plane characterization and inter-well profile characterization, comprehensive characterization of the injection-production flow field is achieved. According to the technical scheme provided by the invention, the systematicness of injection-production flow field characterization can be improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of injection-production flow field characterization, and in particular relates to a comprehensive injection-production flow field characterization method, device, medium and electronic equipment. Background Art

[0002] At present, most oil fields at home and abroad are developed by water injection to supplement formation energy. When the oil field enters the high water content and ultra-high water content period, the dispersion of remaining oil increases significantly, and the underground oil-water seepage relationship becomes more complicated. In order to achieve the requirements of water control and stable oil development in oil reservoirs and further improve the recovery rate of water-driven oil reservoirs, how to clarify the underground injection-production flow field conditions under the current well network and injection-production parameters is the key to improving the recovery rate. To this end, it is necessary to comprehensively characterize the underground injection-production flow field according to geological conditions, well network characteristics and injection-production parameters, so as to clarify the current injection-production flow field displacement characteristics and injection-production flow field development contradictions, and provide scientific basis and guidance for the next step of injection-production flow field optimization and adjustment. It can be seen that the systematic characterization of the injection-production flow field is the primary task of injection-production flow field adjustment. Therefore, in view of the above situation, it is necessary to study a comprehensive characterization method of injection-production flow field. Summary of the invention

[0003] The present invention provides a method, device, medium and electronic device for comprehensive characterization of injection-production flow field. The method for comprehensive characterization of injection-production flow field provided by the present invention can improve the recognition of injection-production flow field and the standardization and systematicness of injection-production flow field characterization, thereby realizing the all-round characterization of injection-production flow field characteristics and providing a basis for adjusting water-drive injection-production flow field.

[0004] Other features and advantages of the present invention will become apparent from the following detailed description, or may be learned in part by the practice of the present invention.

[0005] According to the first aspect of the present invention, a comprehensive characterization method for injection-production flow field is provided, characterized in that the method includes: by determining a central water injection well, a search distance, and a search angle, the injection-production relationship characterization of the central water injection well is realized; by determining the coordinates of the central water injection well, the coordinates of each oil and water well are obtained, thereby realizing the injection-production control area division characterization of the central water injection well; according to the numerical simulation geological model of the reservoir, the residual oil saturation field, and the pressure field, the displacement intensity and displacement degree are determined, thereby realizing the plane characterization of the injection-production flow field; by obtaining the coordinates of the central water injection well and the oil and water well coordinates, the mainstream line profile characterization of the central water injection well, the non-mainstream line profile characterization of the central water injection well, and the inter-well profile characterization of the oil and water wells are determined, thereby determining the inter-well profile characterization of the injection-production flow field; based on the injection-production relationship characterization, the injection-production control area division characterization, the plane characterization, and the inter-well profile characterization, the comprehensive characterization of the injection-production flow field is realized.

[0006] In some embodiments of the present invention, based on the aforementioned scheme, the injection-production relationship characterization of the central water injection well is achieved by determining the central water injection well, the search distance, and the search angle, including: obtaining oil and water wells whose search distance from the central water injection well is less than a first search distance; determining the first oil and water well by judging the search distance between the central water injection well and each of the oil and water wells; determining the order of each oil and water well in a counterclockwise direction according to the first oil and water well and the search angle, thereby achieving the injection-production relationship characterization of the central water injection well.

[0007] In some embodiments of the present application, based on the aforementioned scheme, the method further includes: determining the characterization range of the central water injection well by adjusting the first search distance; and realizing the layered injection-production relationship characterization of the central water injection well according to the characterization range of the central water injection well.

[0008] In some embodiments of the present invention, based on the aforementioned scheme, the coordinates of the central water injection well are determined to obtain the coordinates of each oil and water well, thereby realizing the division and representation of the injection and production control area of ​​the central water injection well, including: determining the coordinates of each oil and water well according to the coordinates of the central water injection well, the search distance, and the search angle; determining the control area node coordinates of the central water injection well according to the coordinates of the central water injection well, the coordinates of the oil and water wells, and the permeability corresponding to the central water injection well, thereby realizing the division and representation of the injection and production control area of ​​the central water injection well.

[0009] In some embodiments of the present application, based on the aforementioned scheme, the displacement intensity and displacement degree are determined according to the numerical simulation geological model of the reservoir, the remaining oil saturation field, and the pressure field, so as to realize the planar characterization of the injection-production flow field, including: based on the numerical simulation geological model of the reservoir, the remaining oil saturation field, and the pressure field, the seepage velocity and the reserve recovery degree corresponding to each grid center point in the numerical simulation geological model of the reservoir are calculated; according to the seepage velocity and the reserve recovery degree, the displacement intensity and the displacement degree are determined, so as to realize the injection-production control area division characterization of the central water injection well based on the displacement intensity and the displacement degree.

[0010] In some embodiments of the present application, based on the aforementioned scheme, in the process of determining the mainstream line profile characterization of the central water injection well by acquiring the coordinates of the central water injection well and the coordinates of the oil and water wells, the method includes: connecting each of the oil and water wells with the central water injection well by acquiring the coordinates of the central water injection well and the coordinates of the oil and water wells, thereby constructing a central water injection well-oil and water well longitudinal profile; according to the central water injection well-oil and water well longitudinal profile, calculating the displacement intensity and displacement degree corresponding to the central water injection well-oil and water well longitudinal profile, thereby determining the mainstream line profile characterization of the central water injection well.

[0011] In some embodiments of the present invention, based on the aforementioned scheme, in the process of determining the non-mainstream line profile characterization of the central water injection well by obtaining the coordinates of the central water injection well and the coordinates of the oil and water wells, the method includes: connecting each of the oil and water wells in sequence by obtaining the coordinates of the central water injection well and the coordinates of the oil and water wells, and connecting the midpoints of the connecting line segments between the central water injection well and each of the oil and water wells, thereby constructing a central water injection well-oil and water well midpoint longitudinal profile; according to the central water injection well-oil and water well midpoint longitudinal profile, calculating the displacement intensity and displacement degree corresponding to the central water injection well-oil and water well midpoint longitudinal profile, thereby determining the non-mainstream line profile characterization of the central water injection well.

[0012] According to a second aspect of the present invention, a comprehensive characterization device for injection-production flow field is provided, characterized in that the device comprises: a first characterization unit, which is used to realize the characterization of the injection-production relationship of the central water injection well by determining the central water injection well, the search distance, and the search angle; a second characterization unit, which is used to obtain the coordinates of each oil and water well by determining the coordinates of the central water injection well, thereby realizing the characterization of the injection-production control area division of the central water injection well; a third characterization unit, which is used to determine the displacement intensity and displacement degree according to the numerical simulation geological model of the reservoir, the residual oil saturation field, and the pressure field, thereby realizing the plane characterization of the injection-production flow field; a fourth characterization unit, which is used to determine the mainstream line profile characterization of the central water injection well, the non-mainstream line profile characterization of the central water injection well, and the inter-well profile characterization of the oil and water wells by obtaining the coordinates of the central water injection well and the coordinates of the oil and water wells, thereby determining the inter-well profile characterization of the injection-production flow field; an integration unit, which is used to realize the comprehensive characterization of the injection-production flow field based on the injection-production relationship characterization, the injection-production control area division characterization, the plane characterization, and the inter-well profile characterization.

[0013] According to a third aspect of the present invention, a computer-readable storage medium is provided, wherein at least one program code is stored in the computer-readable storage medium, and the at least one program code is loaded and executed by a processor to implement the operations performed by the described method.

[0014] According to a fourth aspect of the present invention, an electronic device is provided, characterized in that the electronic device includes one or more processors and one or more memories, at least one program code is stored in the one or more memories, and the at least one program code is loaded and executed by the one or more processors to implement the operations performed by the method.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] The present invention realizes the injection-production relationship characterization of the central water injection well by determining the central water injection well, the search distance, and the search angle. By determining the coordinates of the central water injection well, the coordinates of each oil and water well are obtained, thereby realizing the injection-production control area division characterization of the central water injection well. According to the numerical simulation geological model of the reservoir, the residual oil saturation field, and the pressure field, the displacement intensity and displacement degree are determined, thereby realizing the plane characterization of the injection-production flow field. By obtaining the coordinates of the central water injection well and the coordinates of the oil and water wells, the mainstream line profile characterization of the central water injection well, the non-mainstream line profile characterization of the central water injection well, and the inter-well profile characterization of the oil and water wells are determined, thereby determining the inter-well profile characterization of the injection-production flow field. Based on the injection-production relationship characterization, the injection-production control area division characterization, the plane characterization, and the inter-well profile characterization, the comprehensive characterization of the injection-production flow field is realized.

[0017] Therefore, the comprehensive characterization method of injection-production flow field provided by the present invention can improve the understanding of injection-production flow field and the standardization and systematicness of injection-production flow field characterization, thereby realizing a comprehensive characterization of injection-production flow field characteristics and providing a basis for water drive injection-production flow field adjustment.

[0018] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present invention, and together with the specification, are used to explain the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0020] Figure 1 A flow chart showing a comprehensive characterization method for injection-production flow field in an embodiment of the present application is shown;

[0021] Figure 2 A schematic diagram showing a water injection well searching for an oil and water well in an embodiment of the present application is shown;

[0022] Figure 3 The injection-production control area diagram of the central water injection well in the embodiment of the present application is shown;

[0023] Figure 4 A schematic diagram of the central inter-well main flow line plane in an embodiment of the present application is shown;

[0024] Figure 5 A schematic cross-sectional view of the main flow line between the central wells in an embodiment of the present application is shown;

[0025] Figure 6A schematic diagram of a central inter-well non-mainstream line plane in an embodiment of the present application is shown;

[0026] Figure 7 A schematic cross-sectional view of a non-mainstream line between central wells in an embodiment of the present application is shown;

[0027] Figure 8 A schematic diagram of the plane between oil and water wells in an embodiment of the present application is shown;

[0028] Fig. 9 A schematic diagram of an inter-well cross-section of an oil-water well in an embodiment of the present application is shown;

[0029] Fig.10 It shows the injection-production relationship diagram of the III3 sublayer in the embodiment of the present application;

[0030] Fig.11 The injection-production relationship diagram of the III4 sublayer in the embodiment of the present application is shown;

[0031] Fig.12 It shows the control area representation diagram of the injection-production well pattern of the III3 small layer in the embodiment of the present application;

[0032] Fig.13 It shows the control area representation diagram of the injection-production well pattern of the III4 small layer in the embodiment of the present application;

[0033] Fig.14 The displacement intensity diagram of the III3 sublayer in the embodiment of the present application is shown;

[0034] Fig.15 The displacement intensity diagram of the III4 sublayer in the embodiment of the present application is shown;

[0035] Fig.16 It shows the displacement degree diagram of the III3 sublayer in the embodiment of the present application;

[0036] Fig.17 It shows the displacement degree diagram of the III4 sublayer in the embodiment of the present application;

[0037] Fig.18 The water drive flow field distribution diagram between each well layer of the B34-23 water injection well group in the embodiment of the present application is shown;

[0038] Fig.19 A schematic diagram of the structure of the injection-production flow field comprehensive characterization device in an embodiment of the present application is shown;

[0039] Fig. 20 A schematic diagram of the structure of an electronic device in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present invention. However, it will be appreciated by those skilled in the art that the technical scheme of the present invention can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the present invention.

[0042] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0043] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0044] Next, the present invention application will be described in detail:

[0045] Figure 1 The flowchart of the method for comprehensive characterization of injection-production flow field in the embodiment of the present application is shown. The method for comprehensive characterization of injection-production flow field can be executed by a device with a computing and processing function, such as an injection-production flow field comprehensive characterization device. Figure 1 As shown, the comprehensive characterization method for injection-production flow field includes at least steps 110 to 150, which are described in detail as follows:

[0046] Step 110, by determining the central water injection well, the search distance, and the search angle, the injection-production relationship representation of the central water injection well is achieved;

[0047] Step 120, by determining the coordinates of the central water injection well, obtaining the coordinates of each oil and water well, thereby achieving the division and representation of the injection and production control area of ​​the central water injection well;

[0048] Step 130, determining the displacement intensity and displacement degree according to the reservoir numerical simulation geological model, the remaining oil saturation field, and the pressure field, thereby realizing the plane representation of the injection and production flow field;

[0049] Step 140, by acquiring the coordinates of the central water injection well and the coordinates of the oil and water wells, determining the mainstream line profile characterization of the central water injection well, the non-mainstream line profile characterization of the central water injection well, and the inter-well profile characterization of the oil and water wells, thereby determining the inter-well profile characterization of the injection and production flow field;

[0050] Step 150, based on the injection-production relationship representation, the injection-production control area division representation, the plane representation, and the inter-well profile representation, a comprehensive representation of the injection-production flow field is achieved.

[0051] In this application, in order to clarify the displacement characteristics of the current flow field and the development contradictions of the flow field, and for the subsequent optimization and adjustment of the flow field, it is necessary to comprehensively and multi-angle characterize the characteristic information of the current flow field. Among them, the comprehensive characterization of the current injection-production flow field can include four aspects, namely, the characterization of the injection-production relationship of the central injection well, the characterization of the division of the injection-production control area of ​​the central injection well, the plane characterization of the injection-production flow field, and the inter-well profile characterization of the injection-production flow field.

[0052] Combined with step 110, in the process of realizing the injection-production relationship characterization of the central water injection well, the injection-production relationship characterization of the central water injection well is realized by determining the central water injection well, the search distance, and the search angle, which may include the following steps: obtaining oil and water wells whose search distance from the central water injection well is less than a first search distance; determining the first oil and water well by judging the search distance between the central water injection well and each of the oil and water wells; determining the order of each oil and water well in a counterclockwise direction according to the first oil and water well and the search angle, thereby realizing the injection-production relationship characterization of the central water injection well.

[0053] Specifically, refer to Figure 2 , showing a schematic diagram of a water injection well searching for an oil and water well in an embodiment of the present application. Figure 2 In the process, the location of the central injection well is first determined, and the Figure 2 As shown, the position of the central injection well is marked as 0. Then, the central injection well can be used as the center to search for the maximum distance d. max Within the range, search for the minimum search distance d from the central injection well min Based on this, repeat the above search and labeling steps, based on the central water injection well and the oil production well labeled 1, and search for wells with an angle greater than θ in the counterclockwise direction. min And d<d maxThe oil wells are numbered 1, 2, 3, etc. until all the oil wells are searched, and the number of oil wells found is recorded. k Among them, θ min is the angle between the central water injection well and the oil-water well. d is the distance between the central water injection well and the oil-water well. Combining the above steps, the injection-production relationship characterization of the central water injection well can be achieved.

[0054] In addition, in the process of realizing the injection-production relationship representation of the central water injection well, the representation range of the central water injection well can be determined by adjusting the first search distance. According to the representation range of the central water injection well, the layered injection-production relationship representation of the central water injection well is realized.

[0055] Combined with step 120, in the process of realizing the division and characterization of the injection and production control area of ​​the central water injection well, the coordinates of each oil and water well are obtained by determining the coordinates of the central water injection well, so as to realize the division and characterization of the injection and production control area of ​​the central water injection well. The steps may include: determining the coordinates of each oil and water well according to the coordinates of the central water injection well, the search distance, and the search angle; determining the control area node coordinates of the central water injection well according to the coordinates of the central water injection well, the coordinates of the oil and water wells, and the permeability corresponding to the central water injection well, so as to realize the division and characterization of the injection and production control area of ​​the central water injection well.

[0056] Specifically, refer to Figure 3 , shows the injection and production control area diagram of the central water injection well in the embodiment of the present application. Figure 3 In the method, the coordinates of each oil and water well are determined by first determining the coordinates of the central water injection well and combining the search distance and search angle. Then, the coordinates of the control area nodes of the central water injection well are determined by combining the permeability corresponding to the central water injection well, thereby realizing the division and representation of the injection and production control area of ​​the central water injection well.

[0057] Furthermore, the coordinates of the control area nodes of the central water injection well can be determined by the following formula:

[0058]

[0059]

[0060] Among them, x ic is the x coordinate of the node in the control area of ​​the central injection well; y ic is the y coordinate of the node in the control area of ​​the central water injection well; x0 is the x coordinate of the i-th oil and water well; y0 is the y coordinate of the i-th oil and water well; x i is the x coordinate of the i-th oil and water well; y i is the y coordinate of the i-th oil and water well; k0 is the permeability corresponding to the central injection well; k i is the permeability corresponding to the i-th oil and water well.

[0061] In combination with step 130, in the process of realizing the planar characterization of the injection-production flow field, the displacement intensity and displacement degree are determined according to the numerical simulation geological model of the reservoir, the remaining oil saturation field, and the pressure field, so as to realize the planar characterization of the injection-production flow field, which may include the following steps: based on the numerical simulation geological model of the reservoir, the remaining oil saturation field, and the pressure field, the seepage velocity and the reserve recovery degree corresponding to each grid center point in the numerical simulation geological model of the reservoir are calculated; according to the seepage velocity and the reserve recovery degree, the displacement intensity and the displacement degree are determined, so as to realize the injection-production control area division characterization of the central water injection well based on the displacement intensity and the displacement degree.

[0062] Specifically, the displacement intensity can be calculated by the following formula:

[0063]

[0064] Among them, K ijk is the absolute permeability of each grid in the numerical simulation geological model of the (i, j, k) reservoir; ΔP ijk is the pressure gradient of the (i, j, k) grid in the X and Y directions; ΔL ijk is the length of the (i, j, k) grid in the X and Y directions; k ro , k rw is the relative permeability of oil and water; u o 、u w It is the viscosity of oil and water.

[0065] It should be noted that for the numerical simulation grid data, since the displacement intensity exists in two directions, X and Y,

[0066] At the same time, the displacement degree can be calculated by the following formula:

[0067]

[0068] Among them, S o is oil saturation; S or98 S is the oil saturation corresponding to 98% water content on the phase permeability curve; wc is the bound water saturation.

[0069] Combined with step 140, the coordinates of the central water injection well and the oil and water wells can be obtained to determine the mainstream line profile characterization of the central water injection well, the non-mainstream line profile characterization of the central water injection well, and the inter-well profile characterization of the oil and water wells, thereby determining the inter-well profile characterization of the injection and production flow field.

[0070] Specifically, refer to Figure 4, shows a schematic diagram of the central well main flow line plane in the embodiment of the present application. Figure 5 , shows a schematic diagram of the main flow line section between the central wells in the embodiment of the present application. In the process of determining the main flow line section characterization of the central water injection well, the following steps may be included: by acquiring the coordinates of the central water injection well and the coordinates of the oil and water wells, each of the oil and water wells is connected to the central water injection well, thereby constructing a central water injection well-oil and water well longitudinal section; according to the central water injection well-oil and water well longitudinal section, the displacement intensity and displacement degree corresponding to the central water injection well-oil and water well longitudinal section are calculated, thereby determining the main flow line section characterization of the central water injection well.

[0071] Specifically, refer to Figure 6 , shows a schematic diagram of the central inter-well non-mainstream line plane in the embodiment of the present application. Figure 7 , showing a schematic diagram of the non-mainstream line section between the central wells in the embodiment of the present application. In the process of determining the non-mainstream line section characterization of the central water injection well, the following steps may be included: by acquiring the coordinates of the central water injection well and the coordinates of the oil and water wells, connecting each of the oil and water wells in sequence, and connecting the central water injection well with the midpoint of the connecting line segment between each oil and water well, thereby constructing a central water injection well-oil and water well midpoint longitudinal section; according to the central water injection well-oil and water well midpoint longitudinal section, calculating the displacement intensity and displacement degree corresponding to the central water injection well-oil and water well midpoint longitudinal section, thereby determining the non-mainstream line section characterization of the central water injection well.

[0072] Specifically, refer to Figure 8 , shows a schematic diagram of the plane between the oil and water wells in the embodiment of the present application. Fig. 9 , showing a schematic diagram of the cross section between oil and water wells in the embodiment of the present application. In the process of determining the cross section representation between oil and water wells, the cross section representation between oil and water wells is constructed by sequentially connecting each oil and water well to thereby determine the cross section representation between oil and water wells by combining the central water injection well, each oil and water well, and the above formula for calculating the displacement intensity and displacement degree.

[0073] The above-mentioned central water injection well mainstream line profile characterization, central water injection well non-mainstream line profile characterization, and oil and water well inter-well profile characterization are combined to determine the inter-well profile characterization of the injection and production flow field. The following is a specific embodiment to illustrate the comprehensive characterization method of the injection and production flow field in this application.

[0074] Step 1: Realize the injection-production relationship characterization.

[0075] Referring to Table 1, it can be seen that the number of water injection wells opened in the sublayers Ⅲ2 to Ⅳ5 is greater than 10, and the highest number of water injection wells opened in the sublayers Ⅲ2 to Ⅲ4 is 12. There are 5 to 6 water wells opened in the five sublayers of sublayer Ⅲ1. The number of corresponding wells for single water injection wells is relatively large, mainly concentrated in the correspondence of 3 to 5 oil wells, which is in line with the current correspondence of oil wells in the reverse nine-point well network. However, due to the restrictions of the opening of oil wells, the single water wells have not reached the state of one to nine wells in the reverse nine-point well network, indicating that the current well network needs to be further optimized.

[0076] Table 1. Table of water injection wells and corresponding status in the oil reservoir injection and production well network

[0077]

[0078] Reference Fig.10 , shows the injection-production relationship diagram of the III3 small layer in the embodiment of this application. Fig.11 , showing the injection-production relationship diagram of the III4 sublayer in the embodiment of the present application. From the injection-production relationship of the III sand group, the injection-production correspondence of each sublayer of the sand layer group is mainly manifested in the following characteristics: first, the multi-directional correspondence of the water injection well; second, the overall saturation of the water injection well control area is low; third, the water channeling channel and the dominant channel are obviously developed; this shows that the surface perfection of the injection-production relationship of the sand layer group is good, but after the high water content period, and the block is a low-permeability reservoir, reducing the multi-directional correspondence of the water injection well and improving the directionality of the water injection well are conducive to the effective spread of water injection.

[0079] Step 2: Realize the division and characterization of the injection and production control area.

[0080] Reference Fig.12 , shows a representation diagram of the control area of ​​the injection and production well pattern of the III3 small layer in the embodiment of the present application. Fig.13 , showing a characterization diagram of the control area of ​​the injection and production well network of the Ⅲ4 sub-layer in the embodiment of the present application. According to the perforation relationship of the existing well networks of each sub-layer, the well control area of ​​the central water injection well is characterized, so that the characterization of the control area of ​​the injection and production well network of each sub-layer can be known. Specifically, the oil-bearing area of ​​the Ⅲ1 sub-layer is small, and the injection and production well networks in the southwest, central and eastern regions of the oil-bearing area are not controlled, and the injection and production can be controlled by adjusting the well network; the injection and production well network of the Ⅲ2 sub-layer has a high degree of control, and the uncontrolled areas are mainly concentrated along the fault distribution and the local area in the southwest; the injection and production flow field control of the Ⅲ3~Ⅲ6 sub-layers is relatively high overall, and the residual oil of these four sub-layers is characterized by severe bottom flooding, and the bottom between the water injection well and the production well is basically completely flooded, and the residual oil control well groups in the top area between the wells are greatly different; at the same time, from the perspective of control degree, the injection and production flow field of the Ⅲ6 sub-layer has the lowest control degree, and the injection and production well network needs to be further improved according to the distribution of the remaining oil.

[0081] Step 3: Realize the planar characterization of the injection-production flow field.

[0082] Reference Fig.14, shows the displacement intensity diagram of the III3 sublayer in the embodiment of the present application. Fig.15 , shows the displacement intensity diagram of the III4 sublayer in the example of the present application.

[0083] By obtaining the displacement intensity diagram of each small layer, the displacement intensity of each small layer is analyzed. The specific analysis is as follows:

[0084] ① The water drive intensity of the Ⅲ2 sublayer of the Ⅲ sand layer group is the largest, with an average water drive intensity of more than 5m / d, and the water drive intensity of the Ⅲ1 sublayer is the smallest, with most of the controlled areas less than 0.5m / d.

[0085] ②Ⅲ3, Ⅲ4, Ⅲ5, and Ⅲ6 show that at the bottom of each sublayer, the water drive intensity at the bottom is higher than that at the top, indicating that the fluid flows faster at the bottom of the sublayer than at the top, and the injected water channeling is mainly formed at the bottom of the sublayer.

[0086] ③Comparing among the 6 small layers, they are reduced to Ⅲ2, Ⅲ4, Ⅲ6, Ⅲ3, Ⅲ5, and Ⅲ1 respectively.

[0087] ④ Overall, the water flooding strength of each small layer is well balanced.

[0088] Reference Fig.16 , shows the displacement intensity diagram of the III3 sublayer in the embodiment of the present application. Fig.17 , shows the displacement intensity diagram of the III4 sublayer in the example of the present application.

[0089] By obtaining the displacement degree diagram of each small layer, the displacement degree of each small layer is analyzed. The specific analysis is as follows:

[0090] ① The water flooding degree of the Ⅲ1 and Ⅲ2 sublayers is generally higher than 0.8, especially the Ⅲ2 sublayer, which is generally above 0.9.

[0091] ② The water drive degree at the bottom of the Ⅲ3, Ⅲ4, Ⅲ5, and Ⅲ6 sublayers is all above 0.9, indicating that the lower part is basically in an invalid water circulation state; the water drive degree at the top of the sublayer varies greatly, the water drive degree around the injection wells is above 0.9, and the water drive degree between oil wells is relatively low, less than 0.5.

[0092] ③ For the remaining oil in each small layer of sand group III, the main focus is on tapping the remaining oil around the oil wells and on the top of the oil wells.

[0093] Step 4: Realize the inter-well profile characterization of the injection-production flow field.

[0094] The lowest level of flow field characterization is to describe the flow field inside the well group. Based on the central injection well, the flow field distribution between each well group and each small layer is studied from the perspective of the well group profile. Fig.18, shows the distribution diagram of water drive flow field between wells in the B34-23 water injection well group in the embodiment of the present application. From the distribution of water drive flow field between wells in the B34-23 water injection well group, it can be seen that the well group is completely flooded in all small layers in four directions, and the perforated layers in the well group have no potential. Combining the above-mentioned central water injection well mainstream line profile characterization, central water injection well non-mainstream line profile characterization, and oil and water well inter-well profile characterization, the inter-well profile characterization of the injection and production flow field is determined.

[0095] Based on the same inventive concept, the present invention also provides a comprehensive characterization device for injection and production flow field, referring to Fig.19 , showing a schematic diagram of the structure of the comprehensive characterization device for injection-production flow field in the embodiment of the present application. The comprehensive characterization device for injection-production flow field 1900 includes: a first characterization unit 1901, which is used to characterize the injection-production relationship of the central water injection well by determining the central water injection well, the search distance, and the search angle; a second characterization unit 1902, which is used to obtain the coordinates of each oil and water well by determining the coordinates of the central water injection well, thereby realizing the characterization of the injection-production control area division of the central water injection well; a third characterization unit 1903, which is used to determine the displacement intensity according to the numerical simulation geological model of the reservoir, the residual oil saturation field, and the pressure field and displacement degree, thereby realizing the planar characterization of the injection-production flow field; the fourth characterization unit 1904 is used to determine the mainstream line profile characterization of the central water injection well, the non-mainstream line profile characterization of the central water injection well, and the inter-well profile characterization of the oil-water wells by obtaining the coordinates of the central water injection well and the coordinates of the oil-water wells, thereby determining the inter-well profile characterization of the injection-production flow field; the integration unit 1905 is used to realize the comprehensive characterization of the injection-production flow field based on the injection-production relationship characterization, the injection-production control area division characterization, the planar characterization, and the inter-well profile characterization.

[0096] For details not disclosed in the embodiments of the device of the present invention, please refer to the embodiments of the above method of the present invention.

[0097] Based on the same inventive concept, the present application also provides a computer-readable storage medium, characterized in that at least one program code is stored in the computer-readable storage medium, and the at least one program code is loaded and executed by a processor to implement the operations performed by the described method.

[0098] Based on the same inventive concept, the present invention application also provides an electronic device, referring to Fig. 20 , Fig. 20 A schematic diagram of the structure of an electronic device in an embodiment of the present application is shown.

[0099] The electronic device includes one or more memories 2004, one or more processors 2002, and at least one computer program (program code) stored in the memory 2004 and executable on the processor 2002. When the processor 2002 executes the computer program, the method described above is implemented.

[0100] Among them, Fig. 20 In the embodiment of the present invention, a bus architecture (represented by bus 2000) is shown, bus 2000 may include any number of interconnected buses and bridges, bus 2000 links together various circuits including one or more processors represented by processor 2002 and memory represented by memory 2004. Bus 2000 may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. Bus interface 2005 provides an interface between bus 2000 and receiver 2001 and transmitter 2003. Receiver 2001 and transmitter 2003 may be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 2002 is responsible for managing bus 2000 and general processing, while memory 2004 may be used to store data used by processor 2002 when performing operations.

[0101] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on a computer-readable medium or transmitted via a computer-readable medium. Other examples and implementations are within the scope and spirit of the present application and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hard wiring, or a combination of any of these. In addition, each functional unit may be integrated into a processing unit, each unit may be physically present separately, or two or more units may be integrated into one unit.

[0102] In the several embodiments provided in the present application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation, such as 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 interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0103] The units described as separate components may or may not be physically separated, and the components of the control device may or may not be physical units, that is, they may be located in one place or distributed in multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0104] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention application. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0105] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A comprehensive characterization method for injection-production flow field, characterized in that: The method comprises: By determining the central water injection well, the search distance, and the search angle, the injection-production relationship representation of the central water injection well is achieved; By determining the coordinates of the central water injection well, the coordinates of each oil and water well are obtained, thereby realizing the division and representation of the injection and production control area of ​​the central water injection well; Determine the displacement intensity and degree based on the reservoir numerical simulation geological model, the remaining oil saturation field, and the pressure field, thereby achieving the plane characterization of the injection and production flow field; By acquiring the coordinates of the central water injection well and the coordinates of the oil and water wells, the mainstream line profile characterization of the central water injection well, the non-mainstream line profile characterization of the central water injection well, and the inter-well profile characterization of the oil and water wells are determined, thereby determining the inter-well profile characterization of the injection and production flow field; Based on the injection-production relationship representation, the injection-production control area division representation, the plane representation, and the inter-well profile representation, a comprehensive representation of the injection-production flow field is achieved.

2. The method according to claim 1, characterized in that: The method of determining the central water injection well, the search distance, and the search angle to achieve the injection-production relationship characterization of the central water injection well includes: Acquire oil and water wells whose search distance from the central water injection well is less than a first search distance; Determine the first oil and water well by judging the search distance between the central water injection well and each of the oil and water wells; According to the first oil and water wells and the search angle, the order of the oil and water wells is determined in a counterclockwise direction, thereby achieving the injection-production relationship representation of the central water injection well.

3. The method according to claim 2, characterized in that The method further comprises: By adjusting the first search distance, determining the characterization range of the central water injection well; According to the characterization range of the central water injection well, the layered injection-production relationship characterization of the central water injection well is achieved.

4. The method according to claim 1, characterized in that: The coordinates of each oil and water well are obtained by determining the coordinates of the central water injection well, thereby achieving the division and representation of the injection and production control area of ​​the central water injection well, including: Determine the coordinates of each oil and water well according to the coordinates of the central water injection well, the search distance, and the search angle; According to the coordinates of the central water injection well, the coordinates of the oil and water wells, and the permeability corresponding to the central water injection well, the control area node coordinates of the central water injection well are determined, thereby realizing the division and representation of the injection and production control area of ​​the central water injection well.

5. The method according to claim 1, characterized in that The method of determining the displacement intensity and displacement degree according to the reservoir numerical simulation geological model, the remaining oil saturation field, and the pressure field, thereby realizing the plane characterization of the injection and production flow field, includes: Based on the reservoir numerical simulation geological model, the remaining oil saturation field, and the pressure field, calculating the seepage velocity and reserve recovery degree corresponding to each grid center point in the reservoir numerical simulation geological model; The displacement intensity and the displacement degree are determined according to the seepage velocity and the reserve production degree, so as to realize the injection and production control area division characterization of the central water injection well based on the displacement intensity and the displacement degree.

6. The method according to claim 1, characterized in that In the process of determining the main flow line profile representation of the central water injection well by acquiring the coordinates of the central water injection well and the coordinates of the oil and water well, the method includes: By acquiring the coordinates of the central water injection well and the coordinates of the oil and water wells, each of the oil and water wells is connected to the central water injection well, thereby constructing a central water injection well-oil and water well longitudinal section; According to the central water injection well-oil-water well longitudinal section, the displacement intensity and displacement degree corresponding to the central water injection well-oil-water well longitudinal section are calculated, so as to determine the mainstream line section characterization of the central water injection well.

7. The method according to claim 1, characterized in that In the process of determining the non-mainstream line profile characterization of the central water injection well by acquiring the coordinates of the central water injection well and the coordinates of the oil and water well, the method includes: By acquiring the coordinates of the central water injection well and the coordinates of the oil and water wells, connecting the oil and water wells in sequence, and connecting the midpoints of the connecting line segments between the central water injection well and the oil and water wells, a longitudinal section of the central water injection well-oil and water well midpoint is constructed; According to the longitudinal section of the midpoint of the central water injection well-oil-water well, the displacement intensity and displacement degree corresponding to the longitudinal section of the midpoint of the central water injection well-oil-water well are calculated, so as to determine the non-mainstream line section characterization of the central water injection well.

8. A comprehensive characterization device for injection and production flow field, characterized in that: The device comprises: A first characterization unit is used to characterize the injection-production relationship of the central water injection well by determining the central water injection well, the search distance, and the search angle; A second characterization unit is used to obtain the coordinates of each oil and water well by determining the coordinates of the central water injection well, thereby realizing the division and characterization of the injection and production control area of ​​the central water injection well; The third characterization unit is used to determine the displacement intensity and displacement degree according to the reservoir numerical simulation geological model, the remaining oil saturation field, and the pressure field, so as to realize the plane characterization of the injection and production flow field; A fourth characterization unit is used to determine the main stream line profile characterization of the central water injection well, the non-main stream line profile characterization of the central water injection well, and the inter-well profile characterization of the oil and water wells by acquiring the coordinates of the central water injection well and the coordinates of the oil and water wells, thereby determining the inter-well profile characterization of the injection and production flow field; The integration unit is used to realize the comprehensive representation of the injection-production flow field based on the injection-production relationship representation, the injection-production control area division representation, the plane representation, and the inter-well profile representation.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores at least one program code, and the at least one program code is loaded and executed by a processor to implement the operations performed by the method according to any one of claims 1 to 7.

10. An electronic device, characterized in that: The electronic device includes one or more processors and one or more memories, wherein the one or more memories store at least one program code, and the at least one program code is loaded and executed by the one or more processors to implement the operations performed by the method according to any one of claims 1 to 7.

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