A method for coordinated gas injection profile control and enhanced sequestration in oil-water reservoirs

Abstract

This invention provides a method for coordinated gas injection profile control and enhanced CO2 storage in oil-water aquifers, relating to the field of carbon dioxide capture, utilization, and storage technology. The method includes: a gas injection oil displacement step: injecting a preset injection gas into the injection well to the target oil layer for gas-driven oil displacement; an oil-water layer separation step: installing a packer in the production well to separate the target oil layer and the target water layer; an oil layer gas injection rate adjustment step: when gas channeling occurs, perforating the target water layer at the injection well end; and a carbon dioxide storage rate adjustment step: if the injection capacity of the target water layer is lower than a preset threshold, perforating the target water layer at the production well end. This invention regulates the gas injection pressure accumulation in the aquifer by controlling the production of saline water, thereby improving the CO2 injectability of the aquifer and increasing the overall CO2 storage rate, achieving coordinated utilization of oil displacement and storage.

Description

Technical Field

[0001] This invention relates to the field of carbon dioxide capture, utilization and storage technology, and more specifically, to a method for coordinated gas injection profile control and enhanced storage of oil and water layers. Background Technology

[0002] Carbon dioxide capture, utilization and storage (CCUS) is currently the only realistic option for achieving large-scale net-zero emissions utilization of fossil energy. It has both strategic significance for the upgrading and transformation of the energy industry and economic value for large-scale emission reduction.

[0003] CO2 geological storage, a key component of CCUS (Coalbed Methane Enhanced Gas) technology, is of great significance for the permanent reduction of CO2 emissions. CO2 geological storage methods mainly include oil and gas reservoirs, deep saline aquifers, and unminable deep coal seams. Oil and gas reservoir storage is currently the most common and dominant method, and the only economically feasible large-scale storage method. Deep saline aquifers, as one of the methods with the greatest storage potential, have undergone extensive research and demonstrations globally. Other CO2 geological storage utilization methods, such as CO2 injection to enhance natural gas recovery, enhanced coalbed methane recovery, and CO2-enhanced geothermal development, are currently only at the research and design stage.

[0004] For CO2 flooding, the significant viscosity difference between the injected gas and crude oil leads to strong viscous fingering of CO2 within the reservoir. Furthermore, the strong heterogeneity of the reservoir and the presence of fractures cause channeling of the injected gas. Fingering and channeling result in ineffective circulation of the injected gas, affecting CO2 flooding and storage efficiency. Current methods for controlling the injection profile and channeling primarily involve stratified injection or injecting chemical agents to adjust the gas intake profile, thereby suppressing channeling and improving flooding performance. While these methods have some effect on improving CO2 flooding efficiency, their impact on increasing CO2 storage capacity is not significant.

[0005] To address the problems of existing technologies, this invention provides a method for coordinated gas injection profile control and enhanced storage of oil and water layers. Summary of the Invention

[0006] In order to overcome the shortcomings of the existing technology, the purpose of this invention is to clarify the influence law of water aquifers in oil and gas areas on the regulation of CO2 gas channeling in oil reservoirs and the synergistic enhancement of burial, and to form a method for the comprehensive synergistic utilization of oil and water reservoirs, providing a new approach for large-scale burial.

[0007] This invention provides a method for coordinated gas injection profile control and enhanced storage of oil and water layers, the method comprising:

[0008] Gas injection oil displacement step: Inject preset injection gas into the injection well to the target oil layer to carry out the gas injection oil displacement process;

[0009] Oil-water separation steps: Install packers in the production well to separate the target oil layer from the target water layer;

[0010] Oil layer gas injection volume adjustment steps: When gas channeling occurs, perforate the target water layer at the injection wellhead;

[0011] Carbon dioxide storage adjustment steps: If the injection capacity of the target water layer is lower than the preset threshold, the target water layer at the production wellhead is perforated.

[0012] According to one embodiment of the present invention, in the gas injection oil displacement step: carbon dioxide is selected as the preset injection gas, and carbon dioxide is injected into the target oil layer through the injection well. During the gas injection oil displacement process, when the injected gas breaks through from the injection well to the production well, it is determined that a gas channeling phenomenon has occurred.

[0013] According to one embodiment of the present invention, in the oil-water separation step: the depth position of the packer in the production well is determined by the target oil layer and the target water layer, wherein the depth position of the packer is between the target oil layer and the target water layer.

[0014] According to one embodiment of the present invention, in the oil-water separation step: a stratified production string is set in the production well to extract oil and water layers in stratified manner as needed.

[0015] According to one embodiment of the present invention, in the oil layer gas injection volume adjustment step: when gas channeling occurs in the injected gas in the target oil layer, the adjacent water layer located below the target oil layer is selected as the target water layer.

[0016] According to one embodiment of the present invention, the permeability and thickness of the target water layer are much greater than those of the target oil layer.

[0017] According to one embodiment of the present invention, in the step of adjusting the gas injection volume in the oil layer: the target water layer at the injection wellhead is perforated to adjust the gas injection volume in the target oil layer, so that the target water layer has a diversion effect on the target oil layer and slows down the gas channeling in the target oil layer.

[0018] According to one embodiment of the present invention, in the carbon dioxide storage adjustment step: the pressure in the target water layer gradually accumulates, causing the injection capacity of the target water layer to gradually decrease. When the injection capacity of the target water layer is lower than a preset threshold, the target water layer at the production wellhead is perforated. By controlling the exploitation of saline water resources in the target water layer, the pressure accumulated in the target water layer is released, the injection performance of the target water layer is improved, and at the same time, the gas channeling degree of the target oil layer is adjusted, increasing the carbon dioxide storage in the target water layer, thereby achieving synergy between carbon dioxide flooding of the target oil layer and carbon dioxide storage in the target water layer.

[0019] According to another aspect of the invention, a storage medium is also provided, which includes a series of instructions for performing the steps of the method described in any of the preceding claims.

[0020] According to another aspect of the present invention, an apparatus for coordinated gas injection profile control and enhanced storage of oil and water layers is also provided, which performs the method as described in any of the preceding claims, the apparatus comprising:

[0021] The gas injection oil displacement module is used to inject preset injection gas into the injection well to the target oil layer in order to carry out the gas injection oil displacement process.

[0022] Oil-water separation module, which is used to install packers in production wells to separate the target oil layer from the target water layer;

[0023] The oil reservoir gas injection volume adjustment module is used to open the target water layer at the injection wellhead when gas channeling occurs.

[0024] The carbon dioxide storage regulation module is used to open the target water layer at the production well end if the injection capacity of the target water layer is lower than a preset threshold.

[0025] This invention provides a method for coordinated gas injection profile control and enhanced storage of oil and water layers, which has the following advantages compared with the prior art:

[0026] (1) This invention utilizes the water-bearing layer in the oil and gas zone to control the degree of gas channeling during oil injection and to enhance the burial of the oil-water layer.

[0027] (2) The present invention regulates the gas flow in the oil layer by blasting open the aquifer with high permeability, thickness and large coverage area adjacent to the oil layer and by absorbing gas from the aquifer.

[0028] (3) This invention regulates the gas injection pressure accumulation in the aquifer by controlling the production of saline water in the aquifer, thereby improving the CO2 injection performance of the aquifer and increasing the overall CO2 storage capacity, thus achieving the synergistic utilization of oil displacement and storage.

[0029] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0030] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0031] Figure 1A flowchart illustrating the steps of a method for coordinated gas injection profile control and enhanced storage of oil and water layers according to an embodiment of the present invention is shown.

[0032] Figure 2 A schematic diagram of a coordinated gas injection profile control and enhanced storage mode for oil and water layers according to an embodiment of the present invention is shown.

[0033] Figure 3 The diagram shows a process curve of adjusting the CO2 injection and storage volume in the oil reservoir through the water layer according to an embodiment of the present invention.

[0034] In the accompanying drawings, the same parts use the same reference numerals. Also, the drawings are not drawn to scale. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0036] For CO2 flooding, the significant viscosity difference between the injected gas and crude oil leads to strong viscous fingering of CO2 within the reservoir. Furthermore, the strong heterogeneity of the reservoir and the presence of fractures cause channeling of the injected gas. Fingering and channeling result in ineffective circulation of the injected gas, affecting CO2 flooding and storage efficiency. Current methods for controlling the injection profile and channeling primarily involve stratified injection or injecting chemical agents to adjust the gas intake profile, thereby suppressing channeling and improving flooding performance. While these methods have some effect on improving CO2 flooding efficiency, their impact on increasing CO2 storage capacity is not significant.

[0037] To address the problems of existing technologies, this invention considers the control of gas channeling during CO2 oil displacement and the problem of enhanced CO2 storage, and forms a method for coordinated gas injection profile control and enhanced storage of oil and water layers, providing technical support for large-scale CO2 storage in oil and gas fields.

[0038] Figure 1 The flowchart illustrates a method for coordinated gas injection profile control and enhanced storage of oil and water layers according to an embodiment of the present invention.

[0039] like Figure 1 As shown, in step S101, the gas injection oil displacement step involves injecting a preset injection gas into the injection well to the target oil layer to carry out the gas injection oil displacement process.

[0040] In one embodiment, in the gas injection oil displacement step S101: carbon dioxide is selected as the preset injection gas, and carbon dioxide is injected into the target oil layer through the injection well. During the gas injection oil displacement process, when the injected gas breaks through from the injection well to the production well, it is determined that a gas channeling phenomenon has occurred.

[0041] like Figure 1 As shown, in step S102, the oil-water separation step involves installing a packer in the production well to separate the target oil layer from the target water layer.

[0042] In one embodiment, in the oil-water separation step of step S102: the depth position of the packer in the production well is determined by the target oil layer and the target water layer, wherein the depth position of the packer is between the target oil layer and the target water layer.

[0043] In one embodiment, in the oil-water separation step of step S102: a stratified production string is set in the production well to extract oil and water layers in stratified manner as needed.

[0044] like Figure 1 As shown, in step S103, the oil layer gas injection volume adjustment step is as follows: when gas channeling occurs, the target water layer at the injection wellhead is perforated.

[0045] In one embodiment, in the oil layer gas injection volume adjustment step S103: when gas channeling occurs in the injected gas in the target oil layer, the adjacent water layer located below the target oil layer is selected as the target water layer.

[0046] In one embodiment, the permeability and thickness of the target water layer are much greater than those of the target oil layer.

[0047] In one embodiment, in the oil layer gas injection volume adjustment step of step S103: the target water layer at the injection wellhead is perforated to adjust the gas injection volume in the target oil layer, so that the target water layer has a diversion effect on the target oil layer and slows down the gas channeling in the target oil layer.

[0048] like Figure 1 As shown, in step S104, the carbon dioxide storage adjustment step is as follows: if the injection capacity of the target water layer is lower than the preset threshold, the target water layer at the production well end is perforated.

[0049] In one embodiment, in the carbon dioxide storage adjustment step S104: the pressure in the target water layer gradually accumulates, causing the injection capacity of the target water layer to gradually decrease. When the injection capacity of the target water layer is lower than a preset threshold, the target water layer at the production wellhead is perforated. This invention releases the pressure accumulated in the target water layer by controlling the exploitation of saline water resources in the target water layer, improves the injection performance of the target water layer, and at the same time adjusts the gas channeling degree of the target oil layer, increases the carbon dioxide storage in the target water layer, and achieves the synergy between carbon dioxide flooding of the target oil layer and carbon dioxide storage in the target water layer.

[0050] This invention utilizes the water-bearing layer in the oil and gas zone to control the degree of gas channeling during oil injection and to enhance the burial of the oil-water layer.

[0051] This invention regulates gas flow in the oil layer by blasting open aquifers with high permeability, large thickness and coverage area adjacent to the oil layer, and by absorbing gas from the aquifers.

[0052] This invention regulates the accumulation of gas injection pressure in aquifers by controlling the production of saline water in the aquifers, thereby improving the CO2 injection capacity of the aquifers and increasing the overall CO2 storage capacity, achieving synergistic utilization of oil displacement and storage.

[0053] Figure 2 A schematic diagram of a coordinated gas injection profile control and enhanced storage mode for oil and water layers according to an embodiment of the present invention is shown.

[0054] This invention addresses the issue of CO2 gas leakage in oil reservoirs by utilizing oil and water layers in a coordinated manner, thereby achieving synergistic CO2-driven oil recovery and storage.

[0055] like Figure 2 As shown, CO2 is injected into the upper oil layer through the injection well to drive oil production. Specifically, CO2 is injected into the upper oil layer through the injection well. This oil layer has a permeability of K1, a thickness of h1, and a crude oil viscosity of μ. o During gas-driven oil recovery, gas channeling occurs when injected gas flows from the injection well into the production well.

[0056] like Figure 2 As shown, a packer is installed between the oil layer and the water layer in a production well. Specifically, the oil layer and the adjacent water layer are separated in the production well using a packer, and a stratified production string is installed to allow for stratified production as needed.

[0057] like Figure 2 As shown, the injection point water layer is perforated to regulate the gas injection rate into the oil layer. Specifically, when gas channeling occurs in the oil layer, it is preferable to perforate the adjacent water layer, which has a permeability of K2, a thickness of h2, and a formation water viscosity of μ. w The water layer permeability K2 is much higher than the oil layer permeability K1, and the water layer thickness h2 is much greater than the oil layer thickness h1. This invention regulates the gas injection rate in the oil layer by injecting a water layer with good physical properties; that is, the water layer can have a certain diversion effect on the oil layer, thus mitigating the degree of gas channeling in the oil layer.

[0058] like Figure 2 As shown, the CO2 storage is regulated by perforating the aquifer at the production well tip. Specifically, as the pressure in the aquifer gradually accumulates, the CO2 injection capacity of the aquifer gradually decreases. Perforating the aquifer at the production well tip, such as... Figure 3 As shown, this invention can release the pressure accumulated in the aquifer by controlling the exploitation of saline water resources in the aquifer, improve the CO2 injection performance of the aquifer, and further regulate the degree of CO2 gas migration in the oil reservoir, increase the amount of CO2 stored in the aquifer, and achieve synergy between CO2 flooding in the oil reservoir and CO2 storage in the aquifer.

[0059] It should be noted that the PV number refers to the pore volume multiple, which is the value obtained by dividing the injected or produced volume by the pore volume. It indicates the amount injected or produced. The injected or produced volume can also be expressed directly by volume, but it cannot be compared between different reservoirs. Therefore, the PV number is used. The PV number can be greater than 1 or less than 1.

[0060] This invention is based on the technical concept of burying CO2 in deep saline aquifers. It seeks out aquifers with high reservoir permeability, effective thickness and large coverage area in the vicinity of oil layers. By perforating these layers (target aquifers), the degree of gas channeling in the oil layer is effectively regulated, thereby increasing the amount of buryed CO2. This achieves the synergistic utilization of oil and water layers in oil and gas areas and is a promising integrated utilization method for oil displacement and burial in the future.

[0061] The oil-water layer co-injection profile control and enhanced sealing method provided by the present invention can also be used in conjunction with a computer-readable storage medium, on which a computer program is stored, and the computer program is executed to run the oil-water layer co-injection profile control and enhanced sealing method.

[0062] Computer programs can execute computer instructions, which include computer program code. Computer program code can be in the form of source code, object code, executable files, or some intermediate form.

[0063] Computer-readable storage media can include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc.

[0064] It should be noted that the contents of computer-readable storage media may be appropriately added to or subtracted from the contents according to the requirements of legislation and patent practice in a jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable storage media may not include electrical carrier signals and telecommunication signals.

[0065] According to another aspect of the present invention, an oil-water layer co-injection profile control and enhanced storage device is also provided, which performs an oil-water layer co-injection profile control and enhanced storage method. The device includes: an injection oil displacement module, an oil-water layer separation module, an oil layer injection volume adjustment module, and a carbon dioxide storage volume adjustment module.

[0066] Specifically, the gas injection oil displacement module is used to inject carbon dioxide into the oil layer in the injection well to realize the gas injection oil displacement process.

[0067] In one embodiment, the gas injection oil displacement module performs the following steps: selecting carbon dioxide as the preset injection gas, injecting carbon dioxide into the target oil layer through the injection well, and determining that gas channeling has occurred when the injected gas breaks through from the injection well to the production well during the gas injection oil displacement process.

[0068] Specifically, the oil-water separation module is used to install packers in production wells to separate the oil layer from the water layer below it.

[0069] In one embodiment, the oil-water separation module performs the following steps: determining the depth position of the packer in the production well based on the target oil layer and the target water layer, wherein the depth position of the packer is between the target oil layer and the target water layer.

[0070] In one embodiment, the oil-water separation module performs the following steps: setting up a stratified production string in the production well to extract oil and water layers in stratified manner as needed.

[0071] Specifically, the oil reservoir gas injection volume adjustment module is used to perforate the water layer at the injection well tip when the injected gas breaks through from the injection well to the production well.

[0072] In one embodiment, the oil reservoir gas injection volume adjustment module performs the following steps: when gas channeling occurs in the target oil reservoir, a nearby water layer located below the target oil reservoir is selected as the target water layer. The permeability and thickness of the target water layer are significantly greater than those of the target oil reservoir.

[0073] In one embodiment, the oil layer gas injection volume adjustment module performs the following steps: perforating the target water layer at the injection wellhead to adjust the gas injection volume in the target oil layer, so that the target water layer has a diversion effect on the target oil layer, thereby reducing the degree of gas channeling in the target oil layer.

[0074] Specifically, the carbon dioxide storage regulation module is used to open up the water layer at the production wellhead if the injection capacity of the water layer is lower than a preset threshold.

[0075] In one embodiment, the carbon dioxide storage regulation module performs the following steps: the pressure in the target water layer gradually accumulates, causing the injection capacity of the target water layer to gradually decrease. When the injection capacity of the target water layer is lower than a preset threshold, the target water layer at the production wellhead is perforated. Through the exploitation and control of the saline water resources in the target water layer, the pressure accumulated in the target water layer is released, the injection performance of the target water layer is improved, and at the same time, the gas channeling degree of the target oil layer is adjusted, increasing the carbon dioxide storage in the target water layer, thereby achieving the synergy between carbon dioxide flooding of the target oil layer and carbon dioxide storage in the target water layer.

[0076] In summary, this invention provides a method for coordinated gas injection profile control and enhanced storage in oil-water reservoirs, which has the following advantages compared with existing technologies:

[0077] (1) This invention utilizes the water-bearing layer in the oil and gas zone to control the degree of gas channeling during oil injection and to enhance the burial of the oil-water layer.

[0078] (2) The present invention regulates the gas flow in the oil layer by blasting open the aquifer with high permeability, thickness and large coverage area adjacent to the oil layer and by absorbing gas from the aquifer.

[0079] (3) This invention regulates the gas injection pressure accumulation in the aquifer by controlling the production of saline water in the aquifer, thereby improving the CO2 injection performance of the aquifer and increasing the overall CO2 storage capacity, thus achieving the synergistic utilization of oil displacement and storage.

[0080] It should be understood that the embodiments disclosed herein are not limited to the specific structures, processing steps, or materials disclosed herein, but should be extended to equivalent substitutions of these features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0081] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0082] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0083] Certain terms are used throughout this application to refer to specific system components. As those skilled in the art will recognize, the same components may often be referred to by different names, and therefore this application is not intended to distinguish those components that differ only in name and not in function. In this application, the terms “comprise,” “include,” and “have” are used in an open-ended manner and should therefore be interpreted as meaning “including, but not limited to…”. Furthermore, the terms “substantially,” “materially,” or “approximately” as used herein refer to industry-accepted tolerances for the corresponding terms. The term “coupling,” as may be used herein, includes direct coupling and indirect coupling via additional components, elements, circuits, or modules, wherein, for indirect coupling, the intermediate component, element, circuit, or module does not alter the information of the signal but may adjust its current level, voltage level, and / or power level. Inferred coupling (e.g., one element is inferredly coupled to another element) includes direct and indirect coupling between two elements in the same manner as “coupling.”

[0084] The phrase "an embodiment" or "an embodiment" used in this specification means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Therefore, the phrase "an embodiment" or "an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0085] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

[0086] While the embodiments disclosed in this invention are as described above, the content is merely for the purpose of facilitating understanding of the invention and is not intended to limit the invention. Any person skilled in the art to which this invention pertains may make any modifications and variations in form and detail of the implementation without departing from the spirit and scope disclosed herein; however, the scope of patent protection for this invention shall still be determined by the scope defined in the appended claims.

Claims

1. A method for coordinated gas injection profile control and enhanced storage of oil and water layers, characterized in that, The method includes: Gas injection oil displacement step: Inject a preset injection gas into the injection well to the target oil layer to carry out the gas injection oil displacement process, wherein carbon dioxide is selected as the preset injection gas; Oil-water separation steps: Install packers in the production well to separate the target oil layer from the target water layer; Oil layer gas injection volume adjustment steps: When gas channeling occurs, perforate the target water layer at the injection wellhead; Carbon dioxide storage adjustment steps: If the injection capacity of the target water layer is lower than the preset threshold, the target water layer at the production wellhead is perforated; In the step of adjusting the gas injection volume in the oil layer: the target water layer at the injection wellhead is perforated to adjust the gas injection volume in the target oil layer, so that the target water layer has a diversion effect on the target oil layer and reduces the degree of gas channeling in the target oil layer. In the carbon dioxide storage regulation step: the pressure in the target water layer gradually accumulates, causing the injection capacity of the target water layer to gradually decrease. When the injection capacity of the target water layer is lower than the preset threshold, the target water layer at the production well end is perforated. Through the exploitation and control of the saline water resources in the target water layer, the pressure accumulated in the target water layer is released, the injection performance of the target water layer is improved, and at the same time, the gas channeling degree of the target oil layer is adjusted, increasing the carbon dioxide storage in the target water layer, thereby achieving the synergy between carbon dioxide flooding of the target oil layer and carbon dioxide storage in the target water layer.

2. The method for coordinated gas injection profile control and enhanced sealing of oil-water reservoirs as described in claim 1, characterized in that, In the gas injection oil displacement step: carbon dioxide is injected into the target oil layer through the injection well. During the gas injection oil displacement process, when the injected gas breaks through from the injection well to the production well, it is determined that a gas channeling phenomenon has occurred.

3. The method for coordinated gas injection profile control and enhanced sealing of oil-water reservoirs as described in claim 1, characterized in that, In the oil-water separation step: the depth position of the packer in the production well is determined by the target oil layer and the target water layer, wherein the depth position of the packer is between the target oil layer and the target water layer.

4. The method for coordinated gas injection profile control and enhanced sealing of oil and water layers as described in claim 1, characterized in that, In the oil-water separation step: a stratified production string is installed in the production well to extract oil and water layers in layers as needed.

5. The method for coordinated gas injection profile control and enhanced sealing of oil-water layers as described in claim 2, characterized in that, In the oil layer gas injection volume adjustment step: when gas channeling occurs in the target oil layer, the adjacent water layer located below the target oil layer is selected as the target water layer.

6. A method for coordinated gas injection profile control and enhanced sealing of oil and water layers as described in any one of claims 1-5, characterized in that, The permeability and thickness of the target water layer are much greater than those of the target oil layer.

7. A storage medium, characterized in that, It includes steps for performing the method as described in any one of claims 1-6.

8. A device for coordinated gas injection profile control and enhanced sealing of oil-water layers, characterized in that, The apparatus for performing the method as described in any one of claims 1-6 comprises: The gas injection oil displacement module is used to inject preset injection gas into the injection well to the target oil layer in order to carry out the gas injection oil displacement process. Oil-water separation module, which is used to install packers in production wells to separate the target oil layer from the target water layer; The oil reservoir gas injection volume adjustment module is used to open the target water layer at the injection wellhead when gas channeling occurs. The carbon dioxide storage regulation module is used to open the target water layer at the production well end if the injection capacity of the target water layer is lower than a preset threshold.

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