Method and device for configuring injection and production well pattern in planar heterogeneous oil reservoir

Abstract

The present invention provides a method and device for configuring a planar heterogeneous oil reservoir injection and production well network. The method comprises: in the development adjustment cycle of the planar heterogeneous oil reservoir, cyclically executing the following steps: issuing a first instruction to the injection and production well network so that the water injection wells inject water, the corner wells in the high permeability strips where the river channel sand is developed stop producing oil, and the corner wells in the low permeability zone where the non-river channel sand is developed start producing; after a preset time period, issuing a second instruction to the injection and production well network so that the water injection wells stop injecting water, the corner wells in the low permeability zone where the non-river channel sand is developed stop producing, and the corner wells in the high permeability strips where the river channel sand is developed start producing; after a preset time period, issuing the first instruction to the injection and production well network again. The development of water drive dominant channels in the planar heterogeneous oil reservoir can be avoided, the water drive plane sweep coefficient can be increased, the water drive development effect can be improved, the ultimate recovery rate of the oil reservoir can be increased without drilling new wells, and a reasonable and efficient well network adjustment and deployment method can be provided for the planar heterogeneous oil reservoirs where the river channel sand is developed.

Description

Technical Field

[0001] The invention relates to the technical field of oilfield development, and in particular to a method and a device for configuring a planar heterogeneous oil reservoir injection and production well pattern. Background Art

[0002] Fluvial reservoirs are the main oil and gas reservoir types in domestic and foreign oil fields. Their main characteristics are high degree of river channel development and strong planar heterogeneity. In river channel development areas, reservoir permeability is high, while in non-river channel areas, reservoir permeability is low. During water injection development, the injected water preferentially flows to the river channel sand body, which will form a water drive dominant channel for a long time. The river channel sand body is highly flooded, while in non-river channel areas, the water drive has a low degree of influence, residual oil is enriched, the utilization rate of injected water is low, and the overall water drive development effect is poor. Therefore, in order to achieve better water injection development effects, it is necessary to consider the development characteristics of the river channel and propose a reasonable well network deployment method.

[0003] In reservoirs with developed channel sand, researchers have proposed a well-divided method of injecting water into high-permeability areas and producing oil in low-permeability areas, which can achieve a higher recovery rate. In this well pattern, although the development degree of water-driven dominant channels in high-permeability areas can be reduced, there is still residual oil enrichment between wells due to the physical property differences between high-permeability areas and low-permeability areas, and the recovery rate is not maximized. In addition, many researchers have proposed an unstable water injection method, that is, to change the pressure difference between high-permeability areas and low-permeability areas by periodically changing the water injection volume, water injection speed, and water injection direction to improve the water drive development effect. However, the current unstable water injection method is mainly a change in the water injection work system on the one hand, and lacks a clear well network adjustment method and a definite work system on the other hand. At the same time, in the late stage of high water content and high recovery of sandstone reservoirs, researchers have also proposed a well network densification method to improve the control degree of water drive reserves in order to tap the potential of residual oil between wells. However, the well network densification method requires investment in new drilling, especially in the context of low oil prices, it cannot maximize economic benefits.

[0004] In summary, there is currently a lack of reasonable and efficient well pattern adjustment and deployment methods for planar heterogeneous reservoirs with developed channel sands. Summary of the invention

[0005] The embodiment of the present invention provides a method for configuring a planar heterogeneous oil reservoir injection and production well pattern, which is used to provide a reasonable and efficient well pattern adjustment and deployment mode for a planar heterogeneous oil reservoir with developed channel sand. The method includes:

[0006] During the development adjustment cycle of a planar heterogeneous reservoir, the following steps are performed cyclically:

[0007] A first instruction is issued to the injection and production well network, so that the water injection wells inject water, the corner wells in the high permeability zone where the channel sand is developed stop producing oil, and the corner wells in the low permeability zone where the non-channel sand is developed start producing oil;

[0008] After a preset time period, a second instruction is issued to the injection and production well network to stop water injection in the water injection wells, stop production in the corner wells in the low-permeability zone where non-channel sand is developed, and start production in the corner wells in the high-permeability zone where channel sand is developed;

[0009] After a preset time period, the first instruction is reissued to the injection and production well network.

[0010] The embodiment of the present invention further provides a planar heterogeneous oil reservoir injection and production well pattern configuration device, which is used to provide a reasonable and efficient well pattern adjustment and deployment method for a planar heterogeneous oil reservoir with developed river channel sand. The device includes:

[0011] A circulation module, used for calling the first instruction issuing module and the second instruction issuing module within the development adjustment cycle of the planar heterogeneous oil reservoir;

[0012] The first instruction issuing module is used to issue the first instruction to the injection and production well network, so that the water injection wells inject water, the corner wells in the high permeability zone where the river sand is developed stop producing oil, and the corner wells in the low permeability zone where the non-river sand is developed start producing oil;

[0013] The second instruction issuing module is used to issue a second instruction to the injection and production well network after a preset time period, so that the water injection wells stop injecting water, the corner wells in the low-permeability zone where non-channel sand is developed stop mining, and the corner wells in the high-permeability zone where channel sand is developed start mining;

[0014] After a preset time period, the first instruction is reissued to the injection and production well network.

[0015] An embodiment of the present invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned planar heterogeneous oil reservoir injection and production well network configuration method when executing the computer program.

[0016] An embodiment of the present invention also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for executing the above-mentioned method for configuring injection and production well patterns in a planar heterogeneous oil reservoir.

[0017] In an embodiment of the present invention, within the development adjustment cycle of a planar heterogeneous oil reservoir, the following steps are cyclically executed: a first instruction is issued to the injection-production well network to cause the water injection wells to inject water, the corner wells in the high permeability zone where channel sand is developed stop producing oil, and the corner wells in the low permeability zone where non-channel sand is developed carry out production; after a preset time period, a second instruction is issued to the injection-production well network to cause the water injection wells to stop injecting water, the corner wells in the low permeability zone where non-channel sand is developed stop producing, and the corner wells in the high permeability zone where channel sand is developed carry out production; after the preset time period, the first instruction is reissued to the injection-production well network. By issuing instructions to the injection-production well network, the corner wells put into oil production are periodically changed and the water injection of the water injection wells is adjusted, so that the water injection direction in the planar heterogeneous oil reservoir is periodically changed, forming a periodically changing unstable water drive sweep, which can avoid the development of water drive dominant channels in the planar heterogeneous oil reservoir, increase the water drive planar sweep coefficient, improve the water drive development effect, and increase the ultimate recovery rate of the reservoir without drilling new wells, providing a reasonable and efficient well network adjustment and deployment method for planar heterogeneous oil reservoirs with river sand development. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of a method for configuring a planar heterogeneous oil reservoir injection and production well pattern in an embodiment of the present invention.

[0020] Figure 2 It is a schematic diagram of a method for configuring a planar heterogeneous oil reservoir injection and production well pattern in a specific embodiment of the present invention.

[0021] Figure 3 The conceptual model diagram of a planar heterogeneous oil reservoir with actual channel sand development in a specific application of the present invention.

[0022] Figure 4 The present invention is a schematic diagram of the impact of five-point well pattern exploitation in a certain actual river channel sand development planar heterogeneous oil reservoir in a specific application implementation of the present invention.

[0023] Figure 5 The present invention is a streamline diagram of the initial stage of five-point well pattern exploitation in a certain actual river channel sand development plane heterogeneous oil reservoir in a specific application implementation of the present invention.

[0024] Figure 6 The present invention is a mid-term streamline diagram of five-point well pattern exploitation in a certain actual river channel sand development planar heterogeneous oil reservoir in a specific application implementation of the present invention.

[0025] Figure 7The present invention is a schematic diagram of the oil production sweep of non-river channel sand by water injection in a water injection well in a planar heterogeneous oil reservoir with actual river channel sand development in a specific application implementation of the present invention.

[0026] Figure 8 The present invention is a streamline diagram of non-river channel sand oil production in a water injection well in a heterogeneous oil reservoir with actual river channel sand development in a specific application of the present invention.

[0027] Fig. 9 The present invention is a schematic diagram of the impact of stopping injection of channel sand into a water injection well in a planar heterogeneous oil reservoir with actual channel sand development in a specific application of the present invention.

[0028] Fig.10 The present invention is a streamline diagram of oil production when the injection of river sand is stopped in a water injection well in a heterogeneous oil reservoir with actual river sand development in a specific application of the present invention.

[0029] Fig.11 It is a schematic diagram of a planar heterogeneous oil reservoir injection and production well pattern configuration device in an embodiment of the present invention.

[0030] Fig.12 It is a schematic diagram of a device for configuring a planar heterogeneous oil reservoir injection and production well pattern in a specific embodiment of the present invention. DETAILED DESCRIPTION

[0031] 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 the embodiments. Based on the embodiments of 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.

[0032] The embodiment of the present invention provides a method for configuring a planar heterogeneous oil reservoir injection and production well pattern, which is used to provide a reasonable and efficient well pattern adjustment and deployment method for a planar heterogeneous oil reservoir with developed river channel sand. Figure 1 As shown, the method includes:

[0033] During the development adjustment cycle of a planar heterogeneous reservoir, the following steps are performed cyclically:

[0034] Step 101: issuing a first instruction to the injection-production well network, so that the water injection wells inject water, the corner wells in the high permeability zone where the channel sand is developed stop producing oil, and the corner wells in the low permeability zone where the non-channel sand is developed start producing oil;

[0035] Step 102: after a preset time period, a second instruction is issued to the injection-production well network, so that the water injection wells stop injecting water, the corner wells in the low-permeability zone where non-channel sand is developed stop mining, and the corner wells in the high-permeability zone where channel sand is developed start mining;

[0036] Step 103: After a preset time period, the first instruction is reissued to the injection-production well network.

[0037] Depend on Figure 1 It can be seen from the shown process that in the embodiment of the present invention, within the development adjustment cycle of the planar heterogeneous oil reservoir, the following steps are cyclically executed: a first instruction is issued to the injection-production well network to enable the water injection wells to inject water, the corner wells in the high permeability zone where channel sand is developed to stop producing oil, and the corner wells in the low permeability zone where non-channel sand is developed to produce; after a preset time period, a second instruction is issued to the injection-production well network to enable the water injection wells to stop injecting water, the corner wells in the low permeability zone where non-channel sand is developed to stop producing, and the corner wells in the high permeability zone where channel sand is developed to produce; after the preset time period, the first instruction is re-issued to the injection-production well network. By issuing instructions to the injection-production well network, the corner wells put into oil production are periodically changed and the water injection of the water injection wells is adjusted, so that the water injection direction in the planar heterogeneous oil reservoir is periodically changed, forming a periodically changing unstable water drive sweep, which can avoid the development of water drive dominant channels in the planar heterogeneous oil reservoir, increase the water drive planar sweep coefficient, improve the water drive development effect, and increase the ultimate recovery rate of the reservoir without drilling new wells, providing a reasonable and efficient well network adjustment and deployment method for planar heterogeneous oil reservoirs with river sand development.

[0038] In a specific implementation, a method for configuring a planar heterogeneous oil reservoir injection and production well pattern is also provided. Figure 2 As shown, in Figure 1 On the basis of

[0039] Step 201: obtaining actual reservoir characteristics and development parameters of a planar heterogeneous reservoir;

[0040] Step 202: Based on the actual reservoir characteristics and development parameters of the planar heterogeneous reservoir, the development adjustment period of the planar heterogeneous reservoir is determined by reservoir engineering and reservoir numerical simulation methods.

[0041] Among them, the actual reservoir characteristics of the planar heterogeneous reservoir include: the oil layer thickness, porosity, permeability, and oil saturation of the high permeability strips where the channel sand is developed, the oil layer thickness, porosity, permeability, and oil saturation of the low permeability strips where the non-channel sand is developed, and the development parameters specifically refer to the initial production and water content and current production and water content of the high permeability strips where the channel sand is developed, and the initial production and water content and current production and water content of the low permeability strips where the non-channel sand is developed. After obtaining the actual reservoir characteristics and development parameters of the planar heterogeneous reservoir, the development adjustment period of the planar heterogeneous reservoir is determined through reservoir engineering and reservoir numerical simulation methods. Among them, reservoir engineering methods refer to predicting future production conditions based on past production characteristics during the development of oil and water wells, mainly including production dynamic analysis, empirical statistics, material balance and water drive curve characteristics; reservoir numerical simulation methods refer to establishing a three-dimensional geological model based on the actual characteristics of planar heterogeneous reservoirs, and conducting reservoir numerical simulation, that is, digitizing the reservoir in three dimensions, fitting its past production history, predicting future production processes, and realizing grid and numerical management of underground reservoirs.

[0042] In specific implementation, it is also necessary to use the five-point well network mining method to determine the injection and production well network of the planar heterogeneous oil reservoir. The five-point well network mining method means that the center of the square formed by four adjacent oil production wells is a water injection well, or the center of the square formed by four adjacent water injection wells is an oil production well, each water injection well is related to the surrounding four oil production wells, and each oil production well is affected by four water injection wells, and the ratio of injection and production wells is 1:1.

[0043] After determining the development adjustment cycle of the planar heterogeneous oil reservoir and the injection-production well network of the planar heterogeneous oil reservoir, within the development adjustment cycle of the planar heterogeneous oil reservoir: a first instruction is issued to the injection-production well network to cause the water injection wells to inject water, the corner wells in the high permeability zone where channel sand is developed to stop producing oil, and the corner wells in the low permeability zone where non-channel sand is developed to produce; after a preset time period, a second instruction is issued to the injection-production well network to cause the water injection wells to stop injecting water, the corner wells in the low permeability zone where non-channel sand is developed to stop producing, and the corner wells in the high permeability zone where channel sand is developed to produce; after the preset time period, the first instruction is reissued to the injection-production well network, and the above steps are repeated continuously.

[0044] The preset time period is determined according to the planar heterogeneous reservoir, for example, two months in the specific embodiment. The injection and production well pattern of the planar heterogeneous reservoir in this specific embodiment includes:

[0045] an injection well, located in the river sand;

[0046] Two corner wells used to exploit the reservoir are located in a high-permeability zone where channel sands are developed;

[0047] Two corner wells used to exploit the reservoir are located in a low-permeability zone with developed non-channel sands.

[0048] A specific example is given below to illustrate how to configure the injection and production well pattern of a planar heterogeneous oil reservoir in an embodiment of the present invention. This example is applied to a planar heterogeneous oil reservoir with developed river channel sand in an actual overseas location.

[0049] Due to the restrictions of the contract period, the development of overseas oil fields must consider economic benefits, so drilling new wells to increase the output rate is not the best choice. Therefore, this specific example, under the condition of full consideration of economic benefits, especially under the background of low oil prices, effectively utilizes the existing well network, through the reasonable configuration of the main permeable strips and water injection wells and oil production wells, determines a reasonable well network development work system, and achieves the highest recovery rate and the greatest economic benefits without drilling new wells, so as to be applicable to the efficient development of overseas oil fields subject to contract period restrictions and maximize economic benefits during the contract period.

[0050] A planar heterogeneous oil reservoir with developed channel sand in an actual overseas area was mined using a five-point well pattern. The conceptual model is as follows: Figure 3 As shown. Specifically, the water injection wells are located in the channel sand, the two corner wells for oil production are located in the high permeability strip where the channel sand is developed, and the two corner wells for oil production are located in the low permeability zone where the non-channel sand is developed. Under the current well network, the water injection wells inject water, and the four oil production wells are all produced. The actual development status of the reservoir shows that the two oil production wells in the channel sand have a high initial production, while the two oil production wells in the non-channel sand have a low initial production. After a period of production, the production of the two oil production wells in the channel sand is still higher than that of the two oil production wells in the non-channel sand, but the water content rises rapidly and the production decreases rapidly. This shows that most of the injected water flows to the channel sand, while the two oil production wells in the non-channel sand are less affected. At this time, through the continuous water injection of the water injection wells, the injected water will preferentially spread along the channel sand to form a water drive dominant channel, while the water drive spread degree in the non-channel area is low, and the water drive plane spread is uneven. The schematic diagram of water drive spread is shown as follows Figure 4 .

[0051] Based on the actual reservoir permeability and fluid properties, a three-dimensional geological model of reservoir standardization activities is established. In this model, the porosity and permeability values ​​of the channel sand are the average values ​​of the actual channel sand, and the porosity and permeability values ​​of the non-channel sand are the average values ​​of the actual non-channel sand. Numerical simulation of the reservoir is carried out based on the three-dimensional model. The streamline results of the remaining oil saturation in the early stage of well network injection and production are shown in Figure 2. Figure 5 As shown in the figure, the streamlines in the channel sand are dense and the residual oil saturation value is low, while the streamlines in the non-channel sand are sparse and the residual oil saturation value is high. With the continuation of water injection, in the middle and late stages of development, the streamline density in the channel sand increases, and the residual oil saturation value becomes lower and lower. Although the density of streamlines in the non-channel sand increases and the residual oil saturation decreases to a certain extent, the difference is obvious compared with the channel sand, indicating that a water drive dominant channel has been formed in the channel sand. Its residual oil saturation streamline diagram is shown in the figure below. Figure 6 In this well pattern production mode, there is a large amount of residual oil enrichment in the low permeability area, the water drive effect on the reservoir plane is uneven, and the development effect is poor.

[0052] The method for configuring the injection and production well network in a planar heterogeneous oil reservoir provided by the present invention is used to adjust the original well network. First, the water injection wells continue to inject water, the two oil production wells in the high permeability zone where the channel sand is developed stop producing oil, and the two oil production wells in the low permeability zone where the non-channel sand is developed continue to produce oil. At this time, the high permeability zone where the channel sand is developed is in the process of pressure recovery, while the low permeability zone where the non-channel sand is developed continues to drop in pressure due to the production of oil wells. The injected water overcomes the resistance caused by the permeability difference and continues to gradually flow into the low permeability zone. The water drive sweep degree of the low permeability zone gradually increases, and the water drive plane sweep range of the entire oil reservoir gradually increases. The schematic diagram of the water drive sweep is shown as follows Figure 7 The results of reservoir numerical simulation show that after two months of exploitation, the streamline density in the channel sand decreased, while the streamline density in the non-channel sand increased significantly, the remaining oil saturation decreased significantly, the plane sweep range and sweep coefficient of water flooding increased significantly, and the plane water flooding effect was significantly improved. The remaining oil saturation streamline diagram is shown in Figure 8 shown.

[0053] Secondly, the water injection wells stopped injecting water, the two oil production wells in the low permeability area where non-channel sand was developed stopped producing, and the two oil production wells in the high permeability area where channel sand was developed started producing. At this time, because the pressure in the high permeability area rose when the water injection wells injected water in the previous stage, the remaining oil in the channel sand, especially the edge of the river channel, was effectively mobilized when the oil production wells in the high permeability area produced, and the water drive plane range was further expanded. The water drive sweep diagram is shown in the figure below. Fig. 9 The results of reservoir numerical simulation show that after two months of production, the streamline density in the channel sand increases, the area affected by the channel sand on the plane becomes wider, and the residual oil saturation value of the area with poor physical properties at the edge of the channel decreases. However, due to the unstable water injection in the early stage, the injected water has overcome the resistance caused by the difference in permeability. When the oil well stops production, the non-channel sand is effectively affected by the injected water, the streamline density increases, and the pressure rises. The residual oil saturation streamline diagram is shown in the figure below. Fig.10 shown.

[0054] In a two-month cycle, instructions are issued to effectively configure and adjust water injection wells, oil production wells in non-channel sands, and oil production wells in channel sands, forming unstable water injection sweep inside the reservoir, frequently changing the direction of liquid flow, frequently reducing and increasing the pressure in channel sands and non-channel sands, and injecting water to overcome the resistance caused by the permeability difference between channel sands and non-channel sands, improving the plane water drive sweep effect, and numerical simulation calculation of the reservoir. Using the method provided by the present invention, the water drive plane sweep coefficient of the oil reservoir can be increased by 3-5% during the contract period, the oil increase effect is obvious, and the recovery degree and economic benefits are maximized.

[0055] The implementation of the above specific application is only an example, and the remaining implementation methods will not be described in detail one by one.

[0056] Based on the same inventive concept, the embodiment of the present invention further provides a planar heterogeneous oil reservoir injection and production well network configuration device. Since the principle of the problem solved by the planar heterogeneous oil reservoir injection and production well network configuration device is similar to the planar heterogeneous oil reservoir injection and production well network configuration method, the implementation of the planar heterogeneous oil reservoir injection and production well network configuration device can refer to the implementation of the planar heterogeneous oil reservoir injection and production well network configuration method, and the repeated parts will not be repeated. The specific structure is as follows: Fig.11 As shown:

[0057] The circulation module 1101 is used to call the first instruction issuing module 1102 and the second instruction issuing module 1103 within the development adjustment cycle of the planar heterogeneous oil reservoir;

[0058] The first instruction issuing module 1102 is used to issue a first instruction to the injection-production well network, so that the water injection wells inject water, the corner wells in the high-permeability zone with river channel sand development stop producing oil, and the corner wells in the low-permeability zone without river channel sand development start production;

[0059] The second instruction issuing module 1103 is used to issue a second instruction to the injection-production well network after a preset time period, so that the water injection wells stop injecting water, the corner wells in the low-permeability zone where non-channel sand is developed stop mining, and the corner wells in the high-permeability zone where channel sand is developed start mining;

[0060] After a preset time period, the first instruction is reissued to the injection and production well network.

[0061] In a specific embodiment, Fig.12 The planar heterogeneous reservoir injection and production well pattern configuration device shown in FIG. Fig.11 On the basis of

[0062] Develop an adjustment cycle determination module 1201, used to:

[0063] Obtain actual reservoir characteristics and development parameters for planar heterogeneous reservoirs;

[0064] Based on the actual reservoir characteristics and development parameters of planar heterogeneous reservoirs, the development adjustment period of planar heterogeneous reservoirs is determined through reservoir engineering and reservoir numerical simulation methods.

[0065] In a specific embodiment, a device for configuring a planar heterogeneous oil reservoir injection and production well pattern is also provided. Fig.11 or Fig.12 On the basis of

[0066] The injection and production well pattern determination module is used to:

[0067] The injection-production well pattern of planar heterogeneous reservoirs is determined using the five-point well pattern production method.

[0068] Among them, the injection and production well pattern of planar heterogeneous reservoirs includes:

[0069] an injection well, located in the river sand;

[0070] Two corner wells used to exploit the reservoir are located in a high-permeability zone where channel sands are developed;

[0071] Two corner wells used to exploit the reservoir are located in a low-permeability zone with developed non-channel sands.

[0072] An embodiment of the present invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned planar heterogeneous oil reservoir injection and production well network configuration method when executing the computer program.

[0073] An embodiment of the present invention further provides a computer-readable storage medium storing a computer program for executing the above-mentioned planar heterogeneous oil reservoir injection and production well pattern configuration method.

[0074] In summary, the method and device for configuring a planar heterogeneous oil reservoir injection and production pattern provided by the embodiment of the present invention have the following advantages:

[0075] The following steps are cyclically executed within the development adjustment cycle of the planar heterogeneous oil reservoir: a first instruction is issued to the injection-production well network so that the water injection wells inject water, the corner wells in the high permeability zone where the channel sand is developed stop producing oil, and the corner wells in the low permeability zone where the non-channel sand is developed start producing; after a preset time period, a second instruction is issued to the injection-production well network so that the water injection wells stop injecting water, the corner wells in the low permeability zone where the non-channel sand is developed stop producing, and the corner wells in the high permeability zone where the channel sand is developed start producing; after the preset time period, the first instruction is issued again to the injection-production well network. By issuing instructions to the injection-production well network, the corner wells put into oil production are periodically changed and the water injection of the water injection wells is adjusted, so that the water injection direction in the planar heterogeneous oil reservoir is periodically changed, forming a periodically changing unstable water drive sweep, which can avoid the development of water drive dominant channels in the planar heterogeneous oil reservoir, increase the water drive planar sweep coefficient, improve the water drive development effect, and increase the ultimate recovery rate of the reservoir without drilling new wells, providing a reasonable and efficient well network adjustment and deployment method for planar heterogeneous oil reservoirs with river sand development.

[0076] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, devices, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0077] The present invention is described with reference to flowcharts and / or block diagrams of methods, apparatuses, and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as a combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0078] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0079] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the embodiments of the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for configuring a planar heterogeneous oil reservoir injection and production well pattern, characterized in that: include: Obtain actual reservoir characteristics and development parameters for planar heterogeneous reservoirs; Based on the actual reservoir characteristics and development parameters of the planar heterogeneous reservoir, the development adjustment period of the planar heterogeneous reservoir is determined through reservoir engineering and reservoir numerical simulation methods; the reservoir engineering method refers to predicting the future production status based on the previous production characteristics during the development of oil wells and water wells, including production dynamic analysis method, empirical statistics method, material balance method and water drive curve characteristic method; the reservoir numerical simulation method refers to establishing a three-dimensional geological model based on the actual characteristics of the planar heterogeneous reservoir. In this model, the porosity and permeability values ​​of the channel sand are the average values ​​of the actual channel sand, and the porosity and permeability values ​​of the non-channel sand are the average values ​​of the actual non-channel sand. On the basis of the three-dimensional model, reservoir numerical simulation is carried out to digitize the reservoir in three dimensions, fit the past production history, and predict the future production process; During the development adjustment cycle of a planar heterogeneous reservoir, the following steps are performed cyclically: A first instruction is issued to the injection-production well network, so that the water injection wells inject water, the corner wells in the high permeability strip where the channel sand is developed stop producing oil, and the corner wells in the low permeability zone where the non-channel sand is developed start producing oil; the injection-production well network of the planar heterogeneous oil reservoir includes: one water injection well located in the channel sand; two corner wells for producing oil reservoirs, located in the high permeability strip where the channel sand is developed; two corner wells for producing oil reservoirs, located in the low permeability zone where the non-channel sand is developed; After the preset time period, a second instruction is issued to the injection and production well network to stop water injection in the water injection wells, stop production in the corner wells in the low permeability zone where non-channel sand is developed, and start production in the corner wells in the high permeability zone where channel sand is developed; the preset time period is determined based on the planar heterogeneous oil reservoir; After a preset time period, the first instruction is reissued to the injection and production well network.

2. The method according to claim 1, characterized in that Also includes: The injection-production well pattern of planar heterogeneous reservoirs is determined using the five-point well pattern production method.

3. A planar heterogeneous oil reservoir injection and production well pattern configuration device, characterized in that: include: The development adjustment cycle determination module is used to: obtain the actual reservoir characteristics and development parameters of the planar heterogeneous reservoir; Based on the actual reservoir characteristics and development parameters of the planar heterogeneous reservoir, the development adjustment period of the planar heterogeneous reservoir is determined through reservoir engineering and reservoir numerical simulation methods; the reservoir engineering method refers to predicting the future production status based on the previous production characteristics during the development of oil wells and water wells, including production dynamic analysis method, empirical statistics method, material balance method and water drive curve characteristic method; the reservoir numerical simulation method refers to establishing a three-dimensional geological model based on the actual characteristics of the planar heterogeneous reservoir. In this model, the porosity and permeability values ​​of the channel sand are the average values ​​of the actual channel sand, and the porosity and permeability values ​​of the non-channel sand are the average values ​​of the actual non-channel sand. On the basis of the three-dimensional model, reservoir numerical simulation is carried out to digitize the reservoir in three dimensions, fit the past production history, and predict the future production process; A circulation module, used for calling the first instruction issuing module and the second instruction issuing module within the development adjustment cycle of the planar heterogeneous oil reservoir; The first instruction issuing module is used to issue a first instruction to the injection-production well network, so that the water injection wells inject water, the corner wells in the high permeability strip where the river channel sand is developed stop producing oil, and the corner wells in the low permeability zone where the non-river channel sand is developed start producing oil; the injection-production well network of the planar heterogeneous oil reservoir includes: a water injection well located in the river channel sand; two corner wells for producing oil reservoirs, located in the high permeability strip where the river channel sand is developed; two corner wells for producing oil reservoirs, located in the low permeability zone where the non-river channel sand is developed; The second instruction issuing module is used to issue a second instruction to the injection and production well network after a preset time period, so that the water injection wells stop injecting water, the corner wells in the low-permeability zone where non-channel sand is developed stop mining, and the corner wells in the high-permeability zone where channel sand is developed start mining; After a preset time period, the first instruction is reissued to the injection and production well network.

4. The device according to claim 3, characterized in that Also includes: The injection and production well pattern determination module is used to: The injection-production well pattern of planar heterogeneous reservoirs is determined using the five-point well pattern production method.

5. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the method according to any one of claims 1 to 2 is implemented.

6. 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 method according to any one of claims 1 to 2 is implemented.

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