Oil-water layer collaborative gas injection profile regulation and enhanced sealing method

Abstract

The invention provides an oil-water layer collaborative gas injection profile regulation and enhanced sealing method, and relates to the technical field of carbon dioxide capture, utilization and sealing, and the method comprises the following steps: a gas injection oil displacement step: injecting preset injection gas into an injection well to a target oil layer, so as to carry out a gas injection oil displacement process; an oil-water layer separation step: installing a packer in the production well to separate a target oil layer from a target water layer; an oil layer gas injection amount adjusting step, wherein when the gas channeling phenomenon occurs, a target water layer of the injection well end is injected open; and a carbon dioxide burying amount adjusting step, wherein if the injection capacity of the target water layer is lower than a preset threshold value, the target water layer at the production well end is ejected. According to the method, the gas injection pressure accumulation in the aquifer is adjusted by controlling the output of the salt water in the aquifer, so that the CO2 injectivity of the aquifer is improved, the overall CO2 burying amount is increased, and the collaborative utilization of oil displacement and burying is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon dioxide capture, utilization and storage, and in particular to a method for coordinated gas injection profile control and enhanced storage in oil and water layers. Background Art

[0002] Carbon dioxide capture, utilization and storage (CCUS) is currently the only realistic option for achieving large-scale net zero emission utilization of fossil energy. It not only has strategic significance for the upgrading and transformation of the energy industry, but also has economic value for large-scale emission reduction.

[0003] As a key link in CCUS technology, CO2 geological storage is of great significance for the permanent reduction of CO2 emissions. The main methods of CO2 geological storage include oil and gas reservoirs, deep saline water layers, and unexploitable deep coal seams. Oil and gas reservoir storage is currently the most common method, occupying a dominant position and is currently the only economically feasible large-scale storage method. As one of the methods with the greatest storage potential, deep saline water layers have been extensively studied and demonstrated around the world. Other CO2 geological storage and utilization methods, such as CO2 injection to enhance natural gas recovery, enhance coalbed methane recovery, and CO2 enhanced geothermal development, are currently only in the research and design stage.

[0004] For CO2 flooding, due to the large viscosity difference between the injected gas and crude oil, CO2 will experience strong viscous fingering in the oil layer. In addition, the strong heterogeneity of the reservoir and the developed fracture conditions cause the injected gas to flow. Fingering and gas channeling lead to ineffective circulation of the injected gas, affecting the CO2 flooding and storage effect. The existing methods of controlling the gas injection profile and gas channeling are mainly through layered injection, or injecting chemicals to adjust the suction profile, so as to achieve the purpose of inhibiting gas channeling and improving the flooding effect. These methods have a certain effect on improving the CO2 flooding effect, but they are not obvious in increasing the CO2 storage capacity.

[0005] In view of the problems of the prior art, the present invention provides a method for coordinated gas injection profile control and enhanced sealing of oil and water layers. Summary of the invention

[0006] In order to overcome the defects of the prior art, the purpose of the present invention is to clarify the influence of aquifers in oil and gas areas on the regulation of CO2 gas breakthrough degree in oil layers and the synergistic enhancement of storage, form a comprehensive synergistic utilization method of oil and water layers, and provide a new way for large-scale storage.

[0007] The present invention provides a method for regulating and enhancing the sealing of oil-water layer coordinated gas injection profiles, the method comprising:

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

[0009] Oil-water layer separation step: installing a packer in the production well to separate the target oil layer and the target water layer;

[0010] Steps for adjusting the gas injection volume in the oil layer: when gas channeling occurs, perforate the target water layer at the injection well end;

[0011] Carbon dioxide storage volume adjustment step: If the injection capacity of the target water layer is lower than a preset threshold, the target water layer at the production well end is opened.

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

[0013] According to one embodiment of the present invention, in the oil-water layer 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 layer separation step: a stratified production string is set in the production well to perform stratified production of the oil layer and the water layer as needed.

[0015] According to one embodiment of the present invention, in the oil layer gas injection amount adjustment step: when gas channeling occurs when gas is injected into the target oil layer, an adjacent water layer 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 oil layer gas injection amount adjustment step: the target water layer at the injection well end is opened to adjust the gas injection amount 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.

[0018] According to one embodiment of the present invention, in the carbon dioxide storage amount adjustment step: the pressure in the target water layer gradually accumulates, so that the injection capacity of the target water layer gradually decreases. When the injection capacity of the target water layer is lower than a preset threshold, the target water layer at the production well end is opened, and the pressure accumulated in the target water layer is released through the exploitation and control of the salt water resources of the target water layer, thereby improving the injectivity of the target water layer and adjusting the gas breakthrough degree of the target oil layer. The carbon dioxide storage amount in the target water layer is increased, thereby achieving the coordination of carbon dioxide flooding in the target oil layer and carbon dioxide storage in the target water layer.

[0019] According to another aspect of the present invention, a storage medium is provided, which contains a series of instructions for executing the method steps as described in any one of the above.

[0020] According to another aspect of the present invention, there is also provided an oil-water layer coordinated gas injection profile control and enhanced sealing device, which performs the method as described in any one of the above items, and the device comprises:

[0021] A gas injection oil recovery module, which is used to inject a preset injection gas into the injection well into the target oil layer to perform the gas injection oil recovery process;

[0022] An oil-water layer separation module, which is used to install a packer in a production well to separate a target oil layer and a target water layer;

[0023] Oil layer gas injection volume adjustment module, which is used to open the target water layer at the injection well end when gas channeling occurs;

[0024] A carbon dioxide storage volume adjustment module is used to perforate 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] The present invention provides a method for coordinated gas injection profile control and enhanced sealing of oil and water layers, which has the following advantages over the prior art:

[0026] (1) The present invention utilizes the water-bearing strata in the oil and gas zone to achieve the purpose of controlling the degree of cross-flow of gas injected into the oil layer and strengthening the storage of oil and water layers.

[0027] (2) The present invention regulates gas cross-flow in the oil layer by perforating an aquifer with high permeability, large thickness and large coverage area in the layer adjacent to the oil layer and by gas absorption in the aquifer.

[0028] (3) The present invention adjusts the accumulation of gas injection pressure in the aquifer by controlling the output of salt water in the aquifer, thereby improving the CO2 injectivity of the aquifer and increasing the overall CO2 storage capacity, thereby achieving the coordinated utilization of oil recovery and storage.

[0029] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0031] Figure 1A flowchart of a method for coordinated gas injection profile control and enhanced sealing 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 A process curve diagram of regulating the CO2 injection volume and storage volume in the oil layer through the water layer according to an embodiment of the present invention is shown.

[0034] In the accompanying drawings, the same reference numerals are used for the same components. In addition, the accompanying drawings are not drawn according to the actual scale. DETAILED DESCRIPTION

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

[0036] For CO2 flooding, due to the large viscosity difference between the injected gas and crude oil, CO2 will experience strong viscous fingering in the oil layer. In addition, the strong heterogeneity of the reservoir and the developed fracture conditions cause the injected gas to flow. Fingering and gas channeling lead to ineffective circulation of the injected gas, affecting the CO2 flooding and storage effect. The existing methods of controlling the gas injection profile and gas channeling are mainly through layered injection, or injecting chemicals to adjust the suction profile, so as to achieve the purpose of inhibiting gas channeling and improving the flooding effect. These methods have a certain effect on improving the CO2 flooding effect, but they are not obvious in increasing the CO2 storage capacity.

[0037] In order to solve the problems of the current existing technology, the present invention considers the regulation of gas crosstalk during CO2 oil recovery and the problem of enhanced CO2 storage, forms a method for coordinated gas injection profile regulation and enhanced storage in oil and water layers, and provides technical support for large-scale CO2 storage in oil and gas areas.

[0038] Figure 1 A flow chart of steps of a method for coordinated gas injection profile control and enhanced sealing of oil and water layers according to an embodiment of the present invention is shown.

[0039] like Figure 1 As shown, in step S101, the gas injection oil recovery step: injecting a preset injection gas into the injection well into the target oil layer to perform the gas injection oil recovery process.

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

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

[0042] In one embodiment, in the oil-water layer 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 layer separation step of step S102: a stratified production string is set in the production well to perform stratified production of the oil layer and the water layer as needed.

[0044] like Figure 1 As shown, in step S103, the step of adjusting the gas injection volume of the oil layer: when gas channeling occurs, the target water layer at the injection well end is opened.

[0045] In one embodiment, in the oil layer gas injection amount adjustment step of step S103: when gas channeling occurs when gas is injected into the target oil layer, an adjacent water layer 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 well end is opened 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.

[0048] like Figure 1 As shown, in step S104, the carbon dioxide storage volume adjustment step: 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 opened.

[0049] In one embodiment, in the carbon dioxide storage amount adjustment step of step S104: the pressure in the target water layer gradually accumulates, so that the injection capacity of the target water layer gradually decreases. When the injection capacity of the target water layer is lower than a preset threshold, the target water layer at the production well end is opened. The present invention controls the exploitation of saline water resources in the target water layer, releases the pressure accumulated in the target water layer, improves the injectivity of the target water layer, and simultaneously adjusts the gas breakthrough degree of the target oil layer, increases the carbon dioxide storage amount in the target water layer, and realizes the synergy of carbon dioxide flooding in the target oil layer and carbon dioxide storage in the target water layer.

[0050] The present invention realizes the purpose of controlling the cross-flow degree of gas injected into the oil layer and strengthening the storage of the oil and water layer by utilizing the water-bearing layer in the oil and gas zone.

[0051] The invention adjusts the gas cross-flow in the oil layer by perforating the water-bearing layer with high permeability, large thickness and large coverage area in the layer adjacent to the oil layer and by gas absorption of the water-bearing layer.

[0052] The present invention adjusts the accumulation of gas injection pressure in the aquifer by controlling the output of salt water in the aquifer, thereby improving the CO2 injectivity of the aquifer and increasing the overall CO2 storage capacity, thereby achieving the coordinated utilization of oil displacement and storage.

[0053] Figure 2 A schematic diagram of oil-water layer coordinated gas injection profile regulation and enhanced sealing mode according to an embodiment of the present invention is shown.

[0054] The present invention adjusts the gas channeling problem of CO2 injected into the oil layer through the coordinated utilization of oil and water layers, and realizes the coordination of CO2 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. Specifically, CO2 is injected into the upper oil layer through the injection well. The permeability of the oil layer is K1, the thickness is h1, and the viscosity of the crude oil is μ o During the gas injection flooding process, gas breakthrough occurs when the injected gas breaks through from the injection well to the production well.

[0056] like Figure 2 As shown, a packer is installed between the oil layer and the water layer in the production well. Specifically, the oil layer and the adjacent water layer are separated by a packer in the production well, and a layered production string is set to perform layered production as needed.

[0057] like Figure 2 As shown, the water layer at the injection well end is perforated to adjust the gas injection volume of the oil layer. Specifically, when gas injection into the oil layer causes gas channeling, it is preferred 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. The present invention adjusts the gas injection volume in the oil layer by opening the water layer with good physical properties, that is, the water layer can have a certain diversion effect on the oil layer, slowing down the gas channeling in the oil layer.

[0058] like Figure 2 As shown in Figure 1, the water layer at the production well end is perforated to adjust the CO2 storage capacity. Specifically, as the pressure of the water layer gradually accumulates, the CO2 injection capacity of the water layer gradually decreases. Figure 3 As shown, the present invention can release the pressure accumulated in the water layer and improve the CO2 injectivity of the water layer through the exploitation and control of the salt water resources in the water layer. At the same time, it can further regulate the degree of CO2 gas breakthrough in the oil layer and increase the CO2 storage capacity in the water layer, thereby achieving the synergy of CO2 flooding in the oil layer and CO2 storage in the water layer.

[0059] It should be noted that the PV number refers to the pore volume multiple, that is, the value obtained by dividing the injection volume or production volume by the pore volume, which indicates the amount of injection or production. The injection volume or production volume can also be directly expressed in 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] The present invention is based on the technical idea of ​​storing CO2 in deep saline water layers. It searches for aquifers with high reservoir permeability, large effective thickness and coverage area in the vicinity of the oil layer. By perforating these layers (target water layers), the degree of gas crossover in the oil layer is effectively regulated, and the purpose of increasing the storage volume is achieved, thereby realizing the coordinated utilization of oil and water layers in oil and gas areas. It is a promising comprehensive utilization method for oil recovery and storage in the future.

[0061] The method for coordinated gas injection profile regulation and enhanced sealing of oil and water layers provided by the present invention can also be used in conjunction with a computer-readable storage medium, which stores a computer program. The computer program is executed to run the method for coordinated gas injection profile regulation and enhanced sealing of oil and water layers.

[0062] A computer program can run computer instructions, which include computer program code. The computer program code may be in source code form, object code form, executable file, or some intermediate form.

[0063] Computer-readable storage media may include: any entity or device that can carry computer program code, recording media, USB flash drives, mobile hard disks, 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 content contained in computer-readable storage media can be appropriately increased or decreased based on the requirements of legislation and patent practices in the jurisdiction. For example, in some jurisdictions, based on legislation and patent practices, computer-readable storage media do not include electrical carrier signals and telecommunications signals.

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

[0066] Specifically, the gas injection oil recovery module is used to inject carbon dioxide into the oil layer through the injection well to achieve the gas injection oil recovery process.

[0067] In one embodiment, the gas injection oil recovery module performs the following steps: select carbon dioxide as the preset injection gas, inject carbon dioxide into the target oil layer through the injection well, and during the gas injection oil recovery process, when the injection gas breaks through from the injection well to the production well, determine that gas channeling occurs.

[0068] Specifically, the oil-water layer separation module is used to install a packer in a production well to separate the oil layer and the water layer below the oil layer.

[0069] In one embodiment, the oil-water layer separation module performs the following steps: determining the depth position of the packer in the production well through 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 layer separation module performs the following steps: setting a layered production string in the production well to perform layered production of the oil layer and the water layer as required.

[0071] Specifically, the oil layer gas injection volume regulating module is used to penetrate the water layer at the injection well end when the injected gas breaks through from the injection well to the production well.

[0072] In one embodiment, the oil layer gas injection amount adjustment module performs the following steps: when gas channeling occurs when gas is injected into the target oil layer, an adjacent water layer below the target oil layer is selected as the target water layer, wherein the permeability and thickness of the target water layer are much greater than those of the target oil layer.

[0073] In one embodiment, the oil layer gas injection volume adjustment module performs the following steps: perforating the target water layer at the injection well end 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.

[0074] Specifically, the carbon dioxide storage volume adjustment module is used to perforate the water layer at the end of the production well if the injection capacity of the water layer is lower than a preset threshold.

[0075] In one embodiment, a carbon dioxide storage volume adjustment module performs the following steps: the pressure in the target water layer gradually accumulates, so that the injection capacity of the target water layer gradually decreases; when the injection capacity of the target water layer is lower than a preset threshold, the target water layer at the production well end is opened, and the pressure accumulated in the target water layer is released through the exploitation and control of the salt water resources of the target water layer, thereby improving the injectivity of the target water layer and adjusting the gas breakthrough degree of the target oil layer, thereby increasing the carbon dioxide storage volume in the target water layer, and realizing the coordination of carbon dioxide flooding in the target oil layer and carbon dioxide storage in the target water layer.

[0076] In summary, the present invention provides a method for coordinated gas injection profile control and enhanced sealing of oil and water layers, which has the following advantages over the prior art:

[0077] (1) The present invention utilizes the water-bearing strata in the oil and gas zone to achieve the purpose of controlling the degree of cross-flow of gas injected into the oil layer and strengthening the storage of oil and water layers.

[0078] (2) The present invention regulates gas cross-flow in the oil layer by perforating an aquifer with high permeability, large thickness and large coverage area in the layer adjacent to the oil layer and by gas absorption in the aquifer.

[0079] (3) The present invention adjusts the accumulation of gas injection pressure in the aquifer by controlling the output of salt water in the aquifer, thereby improving the CO2 injectivity of the aquifer and increasing the overall CO2 storage capacity, thereby achieving the coordinated utilization of oil recovery and storage.

[0080] It should be understood that the embodiments disclosed in the present invention are not limited to the specific structures, processing steps or materials disclosed herein, but should be extended to equivalent substitutions of these features understood by ordinary technicians in the relevant field. It should also be understood that the terms used herein are only used for the purpose of describing specific embodiments and are not meant to be limiting.

[0081] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0082] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0083] Certain terms are used throughout this application document to indicate specific system components. As those skilled in the art will recognize, different names can usually be used to indicate the same components, so this application document is not intended to distinguish those components that are only different in name but not in function. In this application document, the terms "comprise", "include" and "have" are used in an open form, and therefore should be interpreted as meaning "including but not limited to...". In addition, the terms "substantially", "substantially" or "approximately" that may be used in this article relate to the tolerances of the corresponding terms accepted by the industry. The term "coupling" as may be used in this article includes direct coupling and indirect coupling via other components, elements, circuits, or modules, wherein for indirect coupling, the components, elements, circuits, or modules between them do not change the information of the signal but can adjust its current level, voltage level, and / or power level. Inferred coupling (for example, one of the elements is coupled to another element by inference) includes direct and indirect coupling between two elements in the same way as "coupling".

[0084] The "one embodiment" or "embodiment" mentioned in the specification means that the specific features, structures or characteristics described in conjunction with the embodiment are included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment" or "embodiment" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0085] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0086] Although the embodiments disclosed in the present invention are as above, the contents described are only embodiments adopted for facilitating the understanding of the present invention and are not intended to limit the present invention. Any technician in the technical field to which the present invention belongs can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in the present invention, but the patent protection scope of the present invention shall still be subject to the scope defined in the attached claims.

Claims

1. A method for coordinated gas injection profile control and enhanced storage in oil and water layers, characterized in that: The method comprises: Gas injection flooding step: injecting a preset injection gas into the injection well into the target oil layer to carry out the gas injection flooding process; Oil-water layer separation step: installing a packer in the production well to separate the target oil layer and the target water layer; Steps for adjusting the gas injection volume in the oil layer: when gas channeling occurs, perforate the target water layer at the injection well end; Carbon dioxide storage volume adjustment step: If the injection capacity of the target water layer is lower than a preset threshold, the target water layer at the production well end is opened.

2. The method for coordinated gas injection profile control and enhanced storage of oil and water layers according to claim 1, characterized in that: In the gas injection oil recovery step: carbon dioxide is selected as the preset injection gas, and the carbon dioxide is injected into the target oil layer through the injection well. During the gas injection oil recovery process, when the injection gas breaks through from the injection well to the production well, it is determined that gas channeling occurs.

3. A method for coordinated gas injection profile control and enhanced sealing of oil and water layers as claimed in claim 1 or 2, characterized in that: In the oil-water layer separation step: the depth position of the packer in the production well is determined through 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. A method for coordinated gas injection profile control and enhanced sealing of oil and water layers according to any one of claims 1 to 3, characterized in that: In the oil-water layer separation step: a layered production string is set in the production well to perform layered production on the oil layer and the water layer as needed.

5. A method for coordinated gas injection profile control and enhanced sealing of oil and water layers according to any one of claims 2 to 4, characterized in that: In the oil layer gas injection amount adjustment step: when gas channeling occurs when gas is injected into the target oil layer, an adjacent water layer below the target oil layer is selected as the target water layer.

6. A method for coordinated gas injection profile control and enhanced storage in oil and water layers according to any one of claims 1 to 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 method for coordinated gas injection profile control and enhanced sealing of oil and water layers according to any one of claims 1 to 6, characterized in that: In the oil layer gas injection amount adjustment step: the target water layer at the injection well end is opened to adjust the gas injection amount 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.

8. A method for coordinated gas injection profile control and enhanced sealing of oil and water layers according to any one of claims 1 to 7, characterized in that: In the carbon dioxide storage amount adjustment step: the pressure in the target water layer gradually accumulates, so that the injection capacity of the target water layer gradually decreases. When the injection capacity of the target water layer is lower than a preset threshold, the target water layer at the production well end is opened, and the pressure accumulated in the target water layer is released through the exploitation and control of the salt water resources of the target water layer, thereby improving the injectivity of the target water layer and adjusting the gas breakthrough degree of the target oil layer. The carbon dioxide storage amount in the target water layer is increased, thereby achieving the coordination of carbon dioxide oil recovery in the target oil layer and carbon dioxide storage in the target water layer.

9. A storage medium, characterized in that: It contains a series of instructions for executing the method steps as claimed in any one of claims 1-8.

10. An oil-water layer coordinated gas injection profile control and enhanced sealing device, characterized in that: Execute the method according to any one of claims 1 to 8, wherein the device comprises: A gas injection oil recovery module, which is used to inject a preset injection gas into the injection well into the target oil layer to perform the gas injection oil recovery process; An oil-water layer separation module, which is used to install a packer in a production well to separate a target oil layer and a target water layer; Oil layer gas injection volume adjustment module, which is used to open the target water layer at the injection well end when gas channeling occurs; A carbon dioxide storage volume adjustment module is used to perforate 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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