Deep reservoir energy development method, device and equipment

Abstract

The invention discloses a deep reservoir energy development method, device and equipment, and the method comprises the steps: obtaining a first geological parameter of a target area to be subjected to energy development, carrying out the first drilling and first fracturing of the target area, and obtaining an injection well group, a first production well group and a first fracture network; when it is determined that first energy produced by the first production well group meets a first preset condition, second drilling and second fracturing are conducted on the target area based on second geological parameters of the target area and the first fracture network, and a second production well group and a second fracture network are obtained, and communicating the first crack network, the second crack network, the injection well group and the second production well group to obtain a third crack network, and constructing a heat storage system so as to utilize the heat storage system to perform multi-energy collaborative development on the target area. Through the method, the infrastructure cost and workload of deep stratum energy development can be reduced, the service life of a gas field is prolonged, and the energy development efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of energy development, and particularly relates to a method, device and equipment for deep reservoir energy development. Background Art

[0002] The deep formation contains relatively rich energy, such as gas reservoirs and geothermal energy, etc. There are many problems in the energy development of the deep formation. Due to the complex deep formation conditions, the complex environment has high requirements for drilling, formation transformation and energy development, and the development cost is high. Moreover, at present, the deep energy development generally adopts a single development mode, making it difficult to fully recover the large amount of infrastructure investment in the early stage. It can be seen that the current deep formation energy development faces the problems of high cost, short economic life, and low energy development efficiency.

[0003] In view of the problems of high infrastructure cost, short economic life, and low energy development efficiency in the current deep formation energy development, no effective solution has been found yet. Summary of the Invention

[0004] The purpose of the embodiments of the present specification is to provide a method, device and equipment for deep reservoir energy development to solve the problems of high infrastructure cost, short economic life, and low energy development efficiency in the deep formation energy development.

[0005] To solve the above technical problems, the first aspect of the present specification provides a method for deep reservoir energy development, including:

[0006] Obtaining first geological parameters of a target area to be subjected to energy development;

[0007] Based on the first geological parameters, performing first drilling and first fracturing on the target area to obtain an injection well group, a first production well group and a first fracture network, and developing first energy in the target area based on the first production well group and the first fracture network;

[0008] When it is determined that the first energy produced by the first production well group meets a first preset condition, obtaining second geological parameters of the target area;

[0009] Based on the second geological parameters and the first fracture network, performing second drilling on the target area to obtain a second production well group;

[0010] Performing second fracturing based on the second production well group to obtain a second fracture network, and connecting the first fracture network, the second fracture network, the injection well group and the second production well group to obtain a third fracture network;

[0011] Based on the injection well group, the second production well group, and the third fracture network, a heat reservoir system is constructed with supercritical CO2 as the circulating medium to synergistically develop oil and gas, geothermal energy, and CO2 geological storage in the target area using the heat reservoir system.

[0012] In some embodiments of the present specification, the injection well group includes an injection well and at least one first horizontal well, the second production well group includes a second production well and multiple second horizontal wells, and the first horizontal well and / or the second horizontal well are connected to multiple radial wells;

[0013] When the supercritical CO2 circulates in the heat reservoir system, it is injected by the injection well group. After residual oil and gas displacement, formation heat exchange, and CO2 geological storage through the third fracture network, high-temperature mixed gas containing residual oil and gas and CO2 is successively produced by multiple radial wells corresponding to each first horizontal well and / or second horizontal well, multiple second horizontal wells, and the second production well. The high-temperature mixed gas is processed to obtain thermal energy, supercritical CO2, and residual oil and gas, and the supercritical CO2 is injected into the injection well group again for the next cycle.

[0014] In some embodiments of the present specification, the first drilling and first fracturing of the target area are performed based on the first geological parameters to obtain an injection well group, a first production well group, and a first fracture network, including:

[0015] Determine the construction parameters corresponding to the injection well and the first production well in the target area based on the first geological parameters, and drill wells in the target area based on the construction parameters to obtain the injection well of the injection well group and the first production well of the first production well group;

[0016] Determine the first fracturing parameters corresponding to the target area based on the first geological parameters. Through multi-branch radial horizontal well technology and volume fracturing technology, the reservoir of the target area is transformed based on the injection well and the first production well to form the first horizontal well of the injection well group, multiple radial wells connected to the first horizontal well, the third horizontal well of the first production well group, multiple radial wells connected to the third horizontal well, and the first fracture network.

[0017] In some embodiments of the present specification, the second drilling of the target area is performed based on the second geological parameters and the first fracture network to obtain a second production well group, including:

[0018] Construct a geological model of the target area based on the second geological parameters and the first fracture network;

[0019] Determine the drilling construction parameters corresponding to the target area based on the geological model;

[0020] Using the well drilling construction parameters, drill in the target area to obtain a second production well and a plurality of second horizontal wells corresponding to the second production well;

[0021] Determine a plurality of target positions on the main wellbores of each second horizontal well, and drill a plurality of radial wells for each second horizontal well based on each target position;

[0022] Take the second production well, the plurality of second horizontal wells, and the plurality of radial wells connected to each second horizontal well as the second production well group.

[0023] In some embodiments of the present specification, the second geological parameters include the geological parameters at multiple moments during the first energy development in the target area and the first geological parameters;

[0024] Correspondingly, based on the second geological parameters and the first fracture network, construct a geological model of the target area, including:

[0025] Based on the geological parameters at the multiple moments, the first geological parameters, and the first fracture network, construct a geological model including the dynamic geological attributes at each position in the target area.

[0026] In some embodiments of the present specification, perform a second fracturing based on the second production well group to obtain a second fracture network, and connect the first fracture network, the second fracture network, the injection well group, and the second production well group to obtain a third fracture network, including:

[0027] Determine the second fracturing parameters corresponding to each radial well in the second production well group based on the geological model;

[0028] Based on each radial well and the second fracturing parameters corresponding to each radial well, use the supercritical CO2 fracturing technology to fracture in a direction parallel to the minimum horizontal principal stress direction of each radial well and perpendicular to the maximum principal stress direction to obtain the second fracture network;

[0029] Use the supercritical CO2 fracturing technology to connect the first fracture network, the second fracture network, the injection well group, and the second production well group to obtain a third fracture network.

[0030] In some embodiments of the present specification, perform a second well drilling on the target area based on the second geological parameters and the first fracture network, including:

[0031] When it is determined that the second geological parameters meet the second preset conditions, perform a second well drilling on the target area based on the second geological parameters and the first fracture network;

[0032] The second preset condition includes at least one of the following: the formation temperature gradient of the target area satisfies the first preset interval, the thickness of the heat storage layer of the target area satisfies the second preset interval, and the rock thermal conductivity of the target area satisfies the third preset interval.

[0033] The second aspect of this specification provides an energy development device for deep reservoirs, including:

[0034] A first acquisition module, configured to acquire first geological parameters of a target area to be subjected to energy development;

[0035] A first transformation module, configured to perform first drilling and first fracturing on the target area based on the first geological parameters to obtain an injection well group, a first production well group, and a first fracture network, and develop first energy in the target area based on the first production well group and the first fracture network;

[0036] A second acquisition module, configured to acquire second geological parameters of the target area when it is determined that the first energy produced by the first production well group satisfies the first preset condition;

[0037] A second transformation module, configured to perform second drilling on the target area based on the second geological parameters and the first fracture network to obtain a second production well group;

[0038] A connection module, configured to perform second fracturing based on the second production well group to obtain a second fracture network, and connect the first fracture network, the second fracture network, the injection well group, and the second production well group to obtain a third fracture network;

[0039] A development module, configured to construct a heat storage system with supercritical CO2 as the circulation medium based on the injection well group, the second production well group, and the third fracture network, and use the heat storage system to perform coordinated development of oil and gas, geothermal energy, and CO2 geological storage in the target area.

[0040] The third aspect of this specification provides an electronic device, including: a memory and a processor, which are communicatively connected to each other, and the memory stores computer instructions, and the processor realizes the steps of the method described in the first aspect by executing the computer instructions.

[0041] The fourth aspect of this specification provides a computer-readable storage medium, which stores computer program instructions, and the computer program instructions realize the steps of the method described in the first aspect when executed by a processor.

[0042] The deep reservoir energy development method, device, and equipment provided in the embodiments of this specification obtain the first geological parameters of the target area to be developed for energy; based on the first geological parameters, perform the first drilling and the first fracturing on the target area to obtain an injection well group, a first production well group, and a first fracture network, and develop the first energy in the target area based on the first production well group and the first fracture network; when it is determined that the first energy produced by the first production well group meets the first preset condition, obtain the second geological parameters of the target area; based on the second geological parameters and the first fracture network, perform the second drilling on the target area to obtain a second production well group; perform the second fracturing based on the second production well group to obtain a second fracture network, and connect the first fracture network, the second fracture network, the injection well group, and the second production well group to obtain a third fracture network; based on the injection well group, the second production well group, and the third fracture network, use supercritical CO2 as the circulating medium to construct a heat storage system to jointly develop oil and gas, geothermal energy, and CO2 geological storage in the target area. Through the above method, only the first energy can be exploited in the initial stage of energy exploitation in the target area. When it is determined that the first energy produced by the first production well group meets the first preset condition, based on the already constructed injection well group and the first fracture network, perform secondary transformation to construct a heat storage system including the second production well group, the injection well group, and the second fracture network. While realizing the reuse of the first fracture network, it can realize the joint development of oil and gas, geothermal energy, and CO2 geological storage in deep formations, reduce the infrastructure cost and workload of deep formation energy development, extend the economic life of gas fields, and improve energy development efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0044] Figure 1 The figure shows a schematic diagram of the deep reservoir energy development method provided in the embodiments of this specification;

[0045] Figure 2 The figure shows a schematic diagram of the three-dimensional development method for the coordination of deep high-temperature gas reservoirs and geothermal energy provided in the embodiments of this specification;

[0046] Figure 3 The figure shows a schematic diagram of the heat storage system provided in the embodiments of this specification;

[0047] Figure 4 The figure shows a schematic diagram of the deep reservoir energy development device provided in the embodiments of this specification;

[0048] Figure 5 The figure shows a schematic diagram of an electronic device provided by an embodiment of this specification. Specific implementation manners

[0049] In order to enable those skilled in the art to better understand the technical solutions in this application, the following will clearly and completely describe the technical solutions in the embodiments of this application in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope of protection of this application.

[0050] Deep formations contain rich energy sources, such as natural gas and geothermal energy. The development of deep gas reservoirs faces many difficulties. Due to the complex conditions of deep formations, the complex underlying environment poses extremely high requirements for drilling, reservoir stimulation, and gas production technologies, resulting in high development costs. In addition, with the current single gas reservoir development model, as the gas reservoir gradually depletes, the economic life of the gas field rapidly shortens, and a large amount of infrastructure investment is difficult to be fully recovered. Geothermal energy, as a renewable clean energy source, has the advantages of huge reserves, wide distribution, stability, and reliability, and has great potential for development and utilization. However, geothermal reservoirs have low permeability and are mostly composed of layered rock formations with multiple lithologies. The complex geological structure requires large-scale reservoir stimulation to achieve efficient heat extraction, and the upfront investment cost is relatively high.

[0051] Thus, it can be seen that the development of deep energy sources all faces the problem of high development costs, and there is a lack of effective coordination and linkage between natural gas development and geothermal energy development. In summary, there is an urgent need for an innovative energy development model to organically combine the development of deep high-temperature gas reservoirs and the utilization of geothermal energy to improve the comprehensive efficiency of energy development.

[0052] Considering the problems faced by the current single energy development model for deep formations, an embodiment of this specification provides a method for developing deep reservoir energy. In the early stage, the first energy is developed through formation stimulation, and in the later stage, the reservoir is secondarily stimulated based on the existing fracture network to construct a heat storage system including a second production well group, an injection well group, and a third fracture network. While realizing the reuse of the first fracture network, it realizes the coordinated development of oil and gas, geothermal energy, and CO2 geological sequestration in deep formations, reduces the infrastructure cost and workload of deep formation energy development, extends the economic life of the gas field, and improves the energy development efficiency.

[0053] It can be understood that for the method provided in the embodiments of the present application, the execution subject of each step can be an electronic device, which refers to an electronic device with data calculation, processing, and storage capabilities. The electronic device can be a terminal such as a personal computer (PC), a tablet computer, a smart phone, a wearable device, a smart robot, etc.; it can also be a server. Among them, the server can be an independent physical server, a server cluster or a distributed system composed of multiple physical servers, or a cloud server providing cloud computing services.

[0054] First, the deep reservoir energy development method provided in the embodiments of the present application will be introduced with reference to the accompanying drawings.

[0055] Figure 1 As shown in the figure, it is a schematic diagram of the deep reservoir energy development method provided in the embodiments of this specification. Although this specification provides method operation steps or device structures as shown in the following embodiments or drawings, based on routine or non-creative labor, more or some combined and fewer operation steps or module units may be included in the method or device. In steps or structures where there is no necessary causal relationship logically, the execution order of these steps or the module structure of the device is not limited to the execution order or module structure shown in the embodiments of this specification or the drawings. When the method or module structure is applied to an actual device, server, or terminal product, it can be executed sequentially or in parallel according to the method or module structure shown in the embodiments or drawings (for example, in an environment of parallel processors or multi-threaded processing, and even including an implementation environment of distributed processing and server clusters). As Figure 1 shown, the method may include:

[0056] S101: Obtain first geological parameters of a target area to be subjected to energy development.

[0057] It can be understood that the target area can be a deep oil and gas reservoir, and the first geological parameter can be the geological parameter of the target area before energy development (such as oil and gas extraction, etc.) in the target area. The geological parameter of the target area will change correspondingly with different stages of energy development. The geological parameter of the target area can be collected during the energy development process, and the geological parameter collected during the development process and the first geological parameter can be used as the second geological parameter. Then, before the subsequent secondary transformation of the reservoir, the second geological parameter can be obtained for the secondary transformation. The geological parameter of the target area can include parameters related to the geological structure, at least including rock mechanics parameters, reservoir physical property parameters, in-situ stress parameters, and formation fluid parameters. Among them, the rock mechanics parameters include elastic modulus, Poisson's ratio, rock hardness, rock compressive strength, rock tensile strength, etc., the reservoir physical property parameters include porosity, permeability, oil / gas saturation, formation temperature gradient, thickness of the thermal reservoir, rock thermal conductivity, etc., the in-situ stress parameters include the magnitude and direction of the maximum horizontal principal stress, the magnitude of the minimum horizontal principal stress, the vertical stress, etc., and the formation fluid parameters include fluid type, fluid pressure, geological structure parameters: fault and fracture distribution, formation dip, etc. Based on the geological parameters, a geological model corresponding to the target area can be constructed, and the parameters required for the transformation of the reservoir in the target area can be determined based on the geological model.

[0058] S102: Perform the first drilling and the first fracturing on the target area based on the first geological parameter to obtain an injection well group, a first production well group, and a first fracture network, and develop the first energy in the target area based on the first production well group and the first fracture network.

[0059] Among them, the first fracture network can be understood as the basis of the second fracture network. The first fracture network can be used for the development of the first energy in the target area, and the first fracture network can be used as the basic fracture to perform secondary transformation on the target area to obtain the second fracture network for the co-development of multiple energies in the target area.

[0060] S103: When it is determined that the first energy produced by the first production well group meets the first preset condition, obtain the second geological parameter of the target area.

[0061] It can be understood that the first energy produced by the first production well group meeting the first preset condition can be that the first energy produced is lower than the preset threshold, that is, the first energy development in the target area enters the depletion period. At this time, there is still some residual first energy in the target area, and there may be other energies. The second geological parameter of the target area can be obtained for the secondary transformation of the target area to perform the subsequent co-development of multiple energies, extend the economic life of the constructed first fracture network and injection wells, and improve the energy development efficiency.

[0062] Further, after obtaining the second geological parameter, it is also possible to evaluate the potential of the target area to achieve the co-development of multiple energy sources based on the second geological parameter. After determining the potential for the co-development of multiple energy sources, subsequent steps S104 to S106 are executed. Specifically, it is possible to determine whether the target area has the potential for the co-development of multiple energy sources by means of the second geological parameter and the geological characteristics corresponding to the presence of other energy sources in the reservoir.

[0063] In some embodiments of this specification, taking the first energy source as oil and gas resources as an example, when the gas reservoir development is exhausted, it is possible to determine whether the target area has the potential for geothermal development based on the second geological parameter of the target area. When it is determined that there is the potential for geothermal development, the target area is re-transformed to construct a heat storage system for the co-development of multiple energy sources, and based on this, the co-development of secondary gas production from the deep gas reservoir, geothermal heat extraction, and CO2 geological sequestration is realized.

[0064] S104: Based on the second geological parameter and the first fracture network, a second drilling is carried out on the target area to obtain a second production well group.

[0065] It can be understood that the second production well group can be used for the extraction of multiple energy sources simultaneously, which can improve the efficiency of energy development.

[0066] In some embodiments of this specification, based on the second geological parameter and the first fracture network, carrying out a second drilling on the target area may include: when it is determined that the second geological parameter meets the second preset condition, based on the second geological parameter and the first fracture network, a second drilling is carried out on the target area. Furthermore, the second preset condition may include at least one of the following: the formation temperature gradient of the target area meets the first preset interval, the thickness of the heat storage layer of the target area meets the second preset interval, and the rock thermal conductivity of the target area meets the third preset interval.

[0067] S105: Based on the second production well group, a second fracturing is carried out to obtain a second fracture network, and the first fracture network, the second fracture network, the injection well group, and the second production well group are connected to obtain a third fracture network.

[0068] It can be understood that the second drilling and the second fracturing may be the same reservoir transformation method as the first drilling and the first fracturing, or may be different reservoir transformation methods. For example, the first drilling and the second drilling may be drillings realized by using the multi-branch radial horizontal well technology, and the first fracturing and the second fracturing may be fracturings realized by using the volume fracturing technology; or, the first drilling is a drilling realized by using the horizontal well technology, the first fracturing is a fracturing realized by using the volume fracturing technology, the second drilling is a drilling realized by using the multi-branch radial horizontal well technology, and the second fracturing is a fracturing realized by using the supercritical CO2 fracturing technology.

[0069] It can be understood that during the second drilling and the second fracturing, the sub-regions suitable for multi-energy collaborative development and / or the isolated fractures in the first fracture network can be determined in the target area. Through the second drilling and the second fracturing, a second fracture network is formed by fracturing in the sub-regions, and the second fracture network, each fracture in the first fracture network, the second production well group and the injection well group are connected to obtain a third fracture network, so that the third fracture network can penetrate the deep and complex formation structure, improving the heat transfer rate and the efficiency of multi-energy collaborative development.

[0070] Specifically, after the second production well group is obtained through the second drilling, the target area can be first fractured for the first time. The first fracturing is used to construct a second fracture network for penetrating the low-permeability area not affected by the first fracture network. Further, the target area can be fractured for the second time to connect the constructed second fracture network with the first fracture network, as well as the isolated fractures, the second production well group and the injection well group in the first fracture network to obtain a third fracture network, causing more positions in the target area to initiate and expand, and fully connecting the fractures, so that a more efficient heat storage system can be constructed. Some structures of the heat storage system can be referred to Figure 3 as shown.

[0071] S106: Based on the injection well group, the second production well group and the third fracture network, a heat storage system is constructed with supercritical CO2 as the circulating medium to utilize the heat storage system for the collaborative development of oil and gas, geothermal energy and CO2 geological storage in the target area.

[0072] It can be understood that the oil and gas development realized by using the heat storage system is secondary gas production. Secondary gas production is to improve the natural gas recovery rate by using the displacement effect of CO2; geothermal heat extraction is for CO2 to obtain geothermal energy through heat exchange with the formation; CO2 geological storage is to store supercritical CO2 in the deep underground through structural storage and mineralization storage. The temperature of the deep high-temperature gas reservoir will exceed 31.1 degrees Celsius and the pressure will exceed 7.38 MPa. When CO2 is used as the heat extraction circulating medium for geothermal energy and injected into the geothermal reservoir from the injection well, the phase state of CO2 will change to the supercritical state. Since supercritical CO2 has low viscosity, high diffusivity and high heat extraction efficiency, it can ensure that the heat extraction medium has high speed and efficiency in circulating and extracting heat in the geothermal reservoir. As the temperature rises, the mineralization reaction rate between carbon dioxide and formation mineral rocks increases significantly. In the environment of deep high-temperature gas reservoirs, the high-temperature condition provides a favorable kinetic environment for the carbon dioxide mineralization reaction, which can effectively promote the reaction process. In this process, carbon dioxide generates stable carbonate minerals by chemically reacting with the mineral rocks in the formation, thus realizing CO2 geological storage more quickly and efficiently, while enhancing the stability of the gas reservoir and achieving carbon dioxide geological storage.

[0073] In some embodiments of the present specification, the heat storage system may further include a heat exchange device, which can be used to perform heat exchange on the gas produced by the second production well to obtain thermal energy. At the same time, it can separate the oil and gas and supercritical CO2 in the produced gas. The thermal energy obtained from the exchange can be used for power generation or other purposes. The separated oil and gas can be used as the mined energy, and the separated supercritical CO2 can be used to be reinjected into the injection well group for the next cycle.

[0074] In some embodiments of the present specification, the injection well group may include an injection well and at least one first horizontal well, and the second production well group may include a second production well and multiple second horizontal wells. The first horizontal well and / or the second horizontal well are connected to multiple radial wells. When the supercritical CO2 circulates in the heat storage system, it can be injected by the injection well group. After residual oil and gas displacement, formation heat exchange, and CO2 geological storage through the third fracture network, high-temperature mixed gas containing residual oil and gas and CO2 is successively produced by multiple radial wells connected to each first horizontal well and / or second horizontal well, multiple second horizontal wells, and the second production well. The high-temperature mixed gas is processed to obtain thermal energy, supercritical CO2, and residual oil and gas, and the supercritical CO2 is reinjected into the injection well group for the next cycle.

[0075] It can be understood that the radial well can be a short well section extending from the main wellbore of the first horizontal well and / or the second horizontal well in multiple directions, and the drilling can be realized by multi-branch radial horizontal well technology. For multi-layer or heterogeneous heat reservoirs, radial wells can be drilled in various directions based on the horizontal well first to penetrate various formation structures, increasing the fracturing sites for subsequent fracturing. The radial well section can provide more flow channels, which is beneficial to the expansion of the displacement front and the expansion of the heat fluid coverage area, improving the gas recovery rate and thermal recovery efficiency. That is, based on the horizontal well, the radial wells drilled in multiple directions along the main wellbore can penetrate multiple heat storage zones, connect the existing gas reservoir fracture network, enhance the reservoir conductivity and thermal energy coupling efficiency, and provide multiple fracturing sites for subsequent supercritical carbon dioxide fracturing, enabling it to initiate and expand at more positions. Moreover, compared with the traditional development method of multiple vertical wells, by drilling radial wells in the main wellbore of the first horizontal well and / or the second horizontal well, the exploitation of a large-area reservoir can be achieved with a smaller number of wellheads, significantly improving the spatial sweep efficiency of the geothermal reservoir and the intersection probability with the fracture network, reducing the construction of surface facilities and the drilling workload, and lowering the overall development cost.

[0076] In some embodiments of the present specification, a first drilling and a first fracturing are performed on a target area based on first geological parameters to obtain an injection well group, a first production well group, and a first fracture network. This may include: determining construction parameters corresponding to injection wells and first production wells in the target area based on the first geological parameters, and drilling wells in the target area based on the construction parameters to obtain injection wells of the injection well group and first production wells of the first production well group; determining first fracturing parameters corresponding to the target area based on the first geological parameters, and reforming the reservoir of the target area based on the injection wells and the first production wells through multi-branch radial horizontal well technology and volume fracturing technology to form first horizontal wells of the injection well group, multiple radial wells connected to the first horizontal wells, third horizontal wells of the first production well group, multiple radial wells connected to the third horizontal wells, and the first fracture network. Among them, the first fracturing parameters may include fracturing pressure, displacement, injection temperature, etc.

[0077] Among them, the multi-branch radial horizontal well technology may be, after drilling a horizontal well, such as the first horizontal well and the third horizontal well, and then, on the basis of the horizontal well, determining multiple target positions on the main wellbore of the horizontal well, and drilling multiple short well sections along multiple directions based on each target position to obtain multiple multi-branch radial wells, realizing the combination of the horizontal well and the radial well, thereby being able to penetrate complex formation structures, improving the permeability of the target area, further improving the first energy recovery rate, and reducing the development cost. The first fracture network may be a fracture network obtained by using the multi-branch radial horizontal well technology to obtain the first horizontal well, multiple radial wells connected to the first horizontal well, the third horizontal well, and multiple radial wells connected to the third horizontal well, and then performing fracturing based on the radial wells by using the volume fracturing technology.

[0078] In some embodiments of the present specification, a second drilling is performed on the target area based on the second geological parameters and the first fracture network to obtain a second production well group. This may include: constructing a geological model of the target area based on the second geological parameters and the first fracture network; determining drilling construction parameters corresponding to the target area based on the geological model; using the drilling construction parameters to drill wells in the target area to obtain second production wells and multiple second horizontal wells corresponding to the second production wells; determining multiple target positions on the main wellbore of each second horizontal well, and drilling multiple radial wells for each second horizontal well based on each target position; and taking the second production wells, the multiple second horizontal wells, and the multiple radial wells connected to each second horizontal well as the second production well group.

[0079] In some embodiments of the present specification, the second geological parameter includes the geological parameters at multiple moments during the first energy development in the target area and the first geological parameter; correspondingly, constructing the geological model of the target area based on the second geological parameter and the first fracture network may include: constructing a geological model including the dynamic geological attributes at each position in the target area based on the geological parameters at the multiple moments, the first geological parameter, and the first fracture network.

[0080] It can be understood that during the subsequent secondary transformation of the target area, the geological parameters at multiple moments and the geological parameters when the target area was initially undeveloped can be combined to analyze the dynamic characteristics of the geological parameters in the target area, and then a dynamic geological model can be constructed based on this, and the subsequent drilling construction parameters and fracturing construction parameters can be determined based on the dynamic geological model.

[0081] Specifically, based on the dynamic geological model, the geological change information of the target area can be determined, and then the drilling construction parameters and / or fracturing construction parameters can be determined in combination with the geological change information. Further, the drilling construction parameters and / or fracturing construction parameters can be determined by means of numerical simulation or by using a pre-trained machine learning / neural network model in combination with the geological change information.

[0082] In some embodiments of the present specification, a second fracturing is performed based on the second production well group to obtain a second fracture network, and the first fracture network, the second fracture network, the injection well group, and the second production well group are connected to obtain a third fracture network, which may include: determining the second fracturing parameters corresponding to each radial well in the second production well group based on the geological model; based on each radial well and the second fracturing parameters corresponding to each radial well, using the supercritical CO2 fracturing technology to fracture in a direction parallel to the minimum horizontal principal stress direction of each radial well and perpendicular to the maximum principal stress direction to obtain the second fracture network; using the supercritical CO2 fracturing technology to connect the first fracture network, the second fracture network, the injection well group, and the second production well group to obtain a third fracture network.

[0083] It can be understood that the second fracturing parameter may include fracturing pressure, proppant type, displacement, and reservoir permeability. Among them, the fracturing pressure can be calculated based on the in-situ stress (minimum horizontal principal stress) and rock tensile strength. The proppant type can be determined in combination with the formation temperature and closure pressure. Exemplarily, resin-coated ceramsite can be selected for high-temperature reservoirs to prevent embedding, and quartz sand can be selected for low closure pressure. The displacement can be determined based on the fracture extension requirement. For example, for a fracture with a length of 50 meters, a certain displacement range needs to be satisfied to enable the fracturing fluid to reach the target position. The displacement can be specifically determined through numerical simulation. At the same time, the fracture length also needs to determine a reasonable value based on geological parameters to avoid hitting other reservoirs and causing risks such as carbon dioxide loss. For high-permeability reservoirs, a higher displacement is required to expand the fracture sweep volume, and the specific range of reservoir permeability can be optimized and determined through numerical simulation.

[0084] It can be understood that supercritical carbon dioxide can promote the propagation of multi-branch fractures due to its low viscosity characteristics. Its low viscosity enables it to more easily penetrate into microfractures and pores, forming multi-level branch fractures. The diffusion coefficient of supercritical CO2 (about 1×10 -7 m 2 / s) is more than 10 times that of water, and it can quickly penetrate into the rock matrix, activate the natural fracture network and form secondary fractures, enhance the three-dimensional connectivity of fractures, and thus can improve the heat exchange rate of the geothermal reservoir system.

[0085] Specifically, the third fracture network can be constructed in the following way: First, based on well logging, seismic, and primary fracturing data, that is, the collected geological data and reservoir characteristics, a three-dimensional geological model can be established, and the high-permeability zones, fracture-dense areas, and "sweet spot" positions can be marked. Then, in combination with the geothermal development potential indicators (temperature gradient > 3.5°C / 100m, geothermal reservoir thickness > 150m), high-temperature and thick-layer areas can be preferentially selected in the three-dimensional geological model. Then, the low-permeability zones or isolated fractures not affected by the primary fracturing can be identified as the target areas through the three-dimensional geological model, and the drilling trajectory can be designed. Further, using horizontal directional drilling technology, the geothermal reservoir can be accurately positioned to obtain multiple horizontal wells. Using radial well drilling technology, multiple radial wells can be drilled from the main wellbore of the horizontal well section of the horizontal well in multiple directions and penetrate deep into the geothermal formation, providing multiple fracturing sites for subsequent supercritical carbon dioxide fracturing, enabling it to initiate and propagate at more positions. Then, using the supercritical CO2 fracturing technology, fracturing can be carried out in the radial well and its surrounding areas in the direction parallel to the minimum horizontal principal stress and perpendicular to the maximum principal stress direction, inducing the fractures to initiate and propagate, and specifically transforming the geothermal reservoir to achieve the precise connection of the reservoir fracture network, obtaining the second fracture network. Furthermore, the supercritical CO2 fracturing technology can be used again to connect the second fracture network, the first fracture network, the injection well group, and the second production well group to obtain the third fracture network.

[0086] The embodiments of the present specification also provide a three-dimensional development method for the coordinated exploitation of deep high-temperature gas reservoirs and geothermal energy. The multi-branch radial horizontal well technology, volume fracturing and other technologies are used to develop deep gas reservoirs to obtain geological data and reservoir characteristics. When the gas reservoir is depleted, the geothermal development potential is judged, and the existing fracture network, multi-branch radial horizontal well technology and supercritical CO2 fracturing technology are used to transform the geothermal reservoir to construct a heat storage system. Using supercritical CO2 as the circulating working fluid, the secondary gas production of deep gas reservoirs, geothermal heat extraction and CO2 geological storage are realized for coordinated development. The following combines Figure 2 and Figure 3 to further introduce this method.

[0087] It can be understood that in the embodiments of the present specification, the first energy is taken as oil and gas as an example, that is, in the embodiments of the present specification, the oil and gas exploitation in the target area in the early stage and the coordinated development of oil and gas, geothermal energy and CO2 geological storage in the later stage are taken as examples to introduce the energy development method for deep reservoirs. In other embodiments, the first energy can also be geothermal energy, CO2 geological storage, etc., and the present specification does not limit this.

[0088] Referring to Figure 2 and Figure 3 shown, this method may include:

[0089] S201: Develop deep gas reservoirs through horizontal well and volume fracturing technologies, and obtain geological data and reservoir characteristics of deep gas reservoirs while conducting gas reservoir exploitation.

[0090] It can be understood that in the initial stage of deep gas reservoir development, the injection wells and reservoirs are transformed through multi-branch radial horizontal well technology and volume fracturing technology to form a preliminary fracture network (i.e., the first fracture network mentioned above) to develop deep gas reservoirs. At this time, the substances produced by the production wells are deep gas. The geological data and reservoir characteristics of deep gas reservoirs can be, for example, stratigraphic structure, rock mechanical parameters, fluid properties, etc.; permeability, porosity, gas saturation, etc. Figure 3

[0091] S202: When the gas reservoir development is depleted, judge whether there is potential for geothermal development based on rich gas field geological data.

[0092] Specifically, based on the rich gas field geological data accumulated during the exploitation process, it can be comprehensively judged whether the area has the potential for geothermal development from aspects such as formation temperature gradient, thickness of the heat storage layer, and rock thermal conductivity. Exemplarily, when it is judged that the formation temperature gradient is greater than [3] °C / 100m, the thickness of the heat storage layer is greater than

[150] meters, and the rock thermal conductivity is greater than [2.5] W / (m·K), it can be determined that the reservoir has the potential for geothermal development.

[0093] ​S203: If there is geothermal potential, based on the existing preliminary fracture network, use multi-branch radial horizontal well technology and supercritical CO2 fracturing technology to transform the geothermal reservoir, accurately connect the reservoir fracture network, and construct a heat storage system.

[0094] Specifically, based on the fracture network formed in the gas reservoir and the known geological structure, design the drilling trajectory, use horizontal directional drilling technology to accurately locate the heat storage reservoir, and then use radial well drilling technology to drill multiple radial wells (i.e., Figure 3 the multi-branch horizontal wells in Figure 3 ), along multiple directions from the main wellbore of the horizontal well section of the horizontal well (i.e.,

[0095] the multi-branch radial wells in

[0096] S204: In the heat storage system, use supercritical CO2 as the circulating working fluid to achieve the coordinated development of secondary gas production in deep gas reservoirs, geothermal heat extraction, and CO2 geological storage.

[0097] Specifically, the constructed heat storage system can refer to Figure 3 as shown. The produced high-temperature CO2 and residual natural gas are brought to the ground through the Figure 3 production wells in

[0098] In the embodiments of this specification, various advantages of carbon dioxide can be used to achieve the coordinated development of secondary gas recovery, geothermal heat extraction and CO2 geological storage in deep gas reservoirs. Due to the unique density and viscosity characteristics of carbon dioxide, it can smoothly enter the tiny pores and complex fracture networks of the gas reservoir, gradually displacing the natural gas remaining inside the gas reservoir, thereby achieving secondary gas recovery in deep gas reservoirs. At the same time, supercritical CO2 has a high specific heat capacity and good thermal conductivity, which can quickly and massively absorb geothermal energy, achieve efficient heat transfer, and complete geothermal heat extraction. In addition, deep gas reservoirs have unique and well-sealed geological structures. Part of the injected CO2 will undergo a series of complex chemical reactions with the rock minerals in the gas reservoir to generate stable carbonate minerals, thereby achieving long-term and stable storage of CO2.

[0099] In the embodiments of this specification, multi-branch radial horizontal wells, volume fracturing and other technologies are used to develop deep gas reservoirs to obtain geological data and reservoir characteristics. When the gas reservoir is exhausted, the geothermal development potential is judged, and the geothermal reservoir is transformed using the existing fracture network and multi-branch radial horizontal well drilling and supercritical CO2 fracturing technology to build a heat storage system. Using supercritical CO2 as the circulating working fluid, secondary gas recovery, geothermal heat extraction and CO2 geological storage of deep gas reservoirs are coordinated. This method significantly reduces the cost of geothermal well construction, extends the economic life of gas fields, improves energy development efficiency, and achieves efficient CO2 storage and low-carbon transformation, which is of great significance to optimizing the energy structure and achieving the "dual carbon" goals.

[0100] Based on the deep reservoir energy development method described above, one or more embodiments of this specification also provide a deep reservoir energy development device. The device may include a device (including a distributed system), software (application), module, plug-in, server, client, etc. using the method described in the embodiment of this specification and a device combined with necessary implementation hardware. Based on the same innovative concept, the device in one or more embodiments provided in the embodiment of this specification is as described in the following embodiments. Since the implementation scheme and method of the device to solve the problem are similar, the implementation of the specific device in the embodiment of this specification can refer to the implementation of the aforementioned method, and the repetitions will not be repeated. As used below, the term "unit" or "module" can implement a combination of software and / or hardware for predetermined functions. Although the device described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceived. Figure 4 FIG. 1 is a schematic diagram of a deep reservoir energy development device provided in an embodiment of the present application. Figure 4 As shown, the deep reservoir energy development device 400 may include:

[0101] A first acquisition module 401 is used to acquire a first geological parameter of a target area to be developed for energy;

[0102] The first modification module 402 is configured to perform a first drilling and a first fracturing on the target area based on the first geological parameters, obtain an injection well group, a first production well group, and a first fracture network, and develop the first energy in the target area based on the first production well group and the first fracture network;

[0103] The second acquisition module 403 is configured to obtain the second geological parameters of the target area when it is determined that the first energy produced by the first production well group meets the first preset condition;

[0104] The second modification module 404 is configured to perform a second drilling on the target area based on the second geological parameters and the first fracture network to obtain a second production well group;

[0105] The connection module 405 is configured to perform a second fracturing based on the second production well group to obtain a second fracture network, connect the first fracture network, the second fracture network, the injection well group, and the second production well group to obtain a third fracture network;

[0106] The development module 406 is configured to construct a heat storage system with supercritical CO2 as the circulating medium based on the injection well group, the second production well group, and the third fracture network, and utilize the heat storage system to co-develop oil and gas, geothermal energy, and CO2 geological storage in the target area.

[0107] In some embodiments of the present specification, the injection well group includes an injection well and at least one first horizontal well, the second production well group includes a second production well and multiple second horizontal wells, and the first horizontal well and / or the second horizontal well are connected to multiple radial wells; when the supercritical CO2 circulates in the heat storage system, it is injected by the injection well group, and after performing residual oil and gas displacement, formation heat exchange, and CO2 geological storage through the third fracture network, the high-temperature mixed gas containing residual oil and gas and CO2 is successively produced by multiple radial wells connected to each first horizontal well and / or second horizontal well, multiple second horizontal wells, and the second production well. The high-temperature mixed gas is processed to obtain heat energy, supercritical CO2, and residual oil and gas, and the supercritical CO2 is injected into the injection well group again for the next cycle.

[0108] In some embodiments of the present specification, the first transformation module 402 is specifically configured to: determine construction parameters corresponding to the injection well and the first production well in the target area based on the first geological parameters, and drill wells in the target area based on the construction parameters to obtain the injection well of the injection well group and the first production well of the first production well group; determine the first fracturing parameters corresponding to the target area based on the first geological parameters, and transform the reservoir of the target area based on the injection well and the first production well through the multi-branch radial horizontal well technology and the volume fracturing technology to form the first horizontal well of the injection well group, multiple radial wells connected to the first horizontal well, the third horizontal well of the first production well group, multiple radial wells connected to the third horizontal well, and the first fracture network.

[0109] In some embodiments of the present specification, the second transformation module 404 is specifically configured to: construct a geological model of the target area based on the second geological parameters and the first fracture network; determine drilling construction parameters corresponding to the target area based on the geological model; use the drilling construction parameters to drill wells in the target area to obtain the second production well and multiple second horizontal wells corresponding to the second production well; determine multiple target positions on the main wellbores of each second horizontal well, and drill multiple radial wells for each second horizontal well based on each target position; use the second production well, multiple second horizontal wells, and multiple radial wells connected to each second horizontal well as the second production well group.

[0110] In some embodiments of the present specification, the second geological parameters include the geological parameters at multiple moments during the first energy development period of the target area and the first geological parameters; correspondingly, when the second transformation module 404 constructs a geological model of the target area based on the second geological parameters and the first fracture network, it is specifically configured to: construct a geological model including the dynamic geological attributes at each position of the target area based on the geological parameters at multiple moments, the first geological parameters, and the first fracture network.

[0111] In some embodiments of the present specification, the connection module 405 is specifically configured to: determine the second fracturing parameters corresponding to each radial well in the second production well group based on the geological model; use the supercritical CO2 fracturing technology based on each radial well and the second fracturing parameters corresponding to each radial well to fracture in a direction parallel to the minimum horizontal principal stress direction of each radial well and perpendicular to the maximum principal stress direction to obtain the second fracture network; use the supercritical CO2 fracturing technology to connect the first fracture network, the second fracture network, the injection well group, and the second production well group to obtain the third fracture network.

[0112] In some embodiments of the present specification, performing a second drilling on the target area based on the second geological parameter and the first fracture network may include: when it is determined that the second geological parameter meets a second preset condition, performing a second drilling on the target area based on the second geological parameter and the first fracture network; the second preset condition may include at least one of the following: the formation temperature gradient of the target area meets a first preset range, the thickness of the heat reservoir layer of the target area meets a second preset range, and the rock thermal conductivity of the target area meets a third preset range.

[0113] The descriptions and functions of the above-mentioned modules can be understood by referring to the content of the deep reservoir energy development method section, and will not be elaborated here.

[0114] An embodiment of the present application further provides an electronic device, as Figure 5 shown. The electronic device may include a processor 501 and a memory 502, where the processor 501 and the memory 502 may be connected through a bus or other means. Figure 5 Taking the connection through the bus as an example.

[0115] The processor 501 may be a central processing unit (CPU). The processor 501 may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. chips, or a combination of the above types of chips.

[0116] The memory 502, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as the program instructions / modules corresponding to the deep reservoir energy development method in the embodiments of the present invention (for example, Figure 4 the first acquisition module 401, the first transformation module 402, the second acquisition module 403, the second transformation module 404, the connection module 405, and the development module 406 in ). The processor 501 executes various functional applications and data processing of the processor by running the non-transitory software programs, instructions, and modules stored in the memory 502, that is, implementing the deep reservoir energy development method in the above method embodiments.

[0117] The memory 502 may include a program storage area and a data storage area. The program storage area may store an operating system and application programs required for at least one function. The data storage area may store data created by the processor 501 and the like. In addition, the memory 502 may include a high-speed random access memory and may also include a non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state storage devices. In some embodiments, the memory 502 may optionally include a memory remotely disposed relative to the processor 501, and these remote memories may be connected to the processor 501 through a network. Examples of the above networks include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0118] The one or more modules are stored in the memory 502 and, when executed by the processor 501, perform the following deep reservoir energy development method:

[0119] Obtain first geological parameters of a target area to be subjected to energy development; based on the first geological parameters, perform first drilling and first fracturing on the target area to obtain an injection well group, a first production well group, and a first fracture network, and perform gas production on the target area based on the first production well group and the first fracture network; when it is determined that the oil and gas produced by the first production well group meet a first preset condition, obtain second geological parameters of the target area; based on the second geological parameters and the first fracture network, perform second drilling on the target area to obtain a second production well group; perform second fracturing based on the second production well group to obtain a second fracture network, and connect the first fracture network, the second fracture network, the injection well group, and the second production well group to obtain a third fracture network; based on the injection well group, the second production well group, and the third fracture network, use supercritical CO2 as a circulating medium to construct a heat storage system, so as to perform coordinated development of oil and gas, geothermal energy, and CO2 geological storage on the target area by using the heat storage system.

[0120] For specific details of the above electronic device, reference may be made to the corresponding related descriptions and effects in the above method embodiments for understanding, and details are not described herein again.

[0121] This specification also provides a computer storage medium storing computer program instructions, and when the computer program instructions are executed, the steps of the above deep reservoir energy development method are implemented.

[0122] This specification also provides a computer program product including a computer program, and when the computer program is executed, the steps of the above deep reservoir energy development method are implemented.

[0123] Those skilled in the art can understand that to implement all or part of the processes in the above method embodiments, it can be completed by instructing relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the above method embodiments. Among them, the storage medium can be a magnetic disk, an optical disc, a read-only memory (ROM), a random access memory (RAM), a flash memory, a hard disk drive (HDD), or a solid-state drive (SSD), etc.; the storage medium can also include a combination of the above types of memories.

[0124] Each embodiment in this specification is described in a progressive manner. For the same or similar parts between the embodiments, reference can be made to each other. The key point of each embodiment is to illustrate the differences from other embodiments.

[0125] The systems, devices, modules, or units described in the above embodiments can be specifically implemented by computer chips or entities, or by products with certain functions.

[0126] For the convenience of description, when describing the above device, it is divided into various units according to functions and described separately. Of course, when implementing the present application, the functions of each unit can be realized in one or more software and / or hardware.

[0127] From the description of the above embodiments, those skilled in the art can clearly understand that the present application can be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product can be stored in a storage medium, such as ROM / RAM, magnetic disk, optical disc, etc., and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods of certain parts of each embodiment of the present application.

[0128] The present application can be used in many general or special computer system environments or configurations. For example: personal computers, server computers, handheld devices or portable devices, tablet devices, multi-processor systems, microprocessor-based systems, set-top boxes, programmable consumer electronic devices, network PCs, small computers, large computers, distributed computing environments including any of the above systems or devices, and so on.

[0129] This application can be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The application can also be practiced in a distributed computing environment where tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules can be located in local and remote computer storage media including storage devices.

[0130] The above are only the preferred embodiments of this specification and are not intended to limit this specification. For those skilled in the art, various changes and modifications can be made to the embodiments of this specification. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this specification shall be included within the protection scope of this specification.

Claims

1. A method for deep reservoir energy development, characterized in that Including: Obtaining first geological parameters of a target area to be developed for energy; Conducting first drilling and first fracturing on the target area based on the first geological parameters to obtain an injection well group, a first production well group, and a first fracture network, and developing first energy in the target area based on the first production well group and the first fracture network; When it is determined that the first energy produced by the first production well group meets a first preset condition, obtaining second geological parameters of the target area; Conducting second drilling on the target area based on the second geological parameters and the first fracture network to obtain a second production well group; Conducting second fracturing based on the second production well group to obtain a second fracture network, and connecting the first fracture network, the second fracture network, the injection well group, and the second production well group to obtain a third fracture network; Based on the injection well group, the second production well group, and the third fracture network, constructing a heat storage system with supercritical CO2 as a circulating medium to conduct coordinated development of oil and gas, geothermal energy, and CO2 geological sequestration in the target area by using the heat storage system.

2. The deep reservoir energy development method according to claim 1, characterized in that The injection well group includes an injection well and at least one first horizontal well, the second production well group includes a second production well and multiple second horizontal wells, and the first horizontal well and / or the second horizontal well are connected to multiple radial wells; When the supercritical CO2 circulates in the heat storage system, it is injected by the injection well group, and after undergoing residual oil and gas displacement, formation heat exchange, and CO2 geological sequestration through the third fracture network, high-temperature mixed gas containing residual oil and gas and CO2 is produced in sequence by multiple radial wells connected to each first horizontal well and / or second horizontal well, multiple second horizontal wells, and the second production well. The high-temperature mixed gas is processed to obtain heat energy, supercritical CO2, and residual oil and gas, and the supercritical CO2 is injected into the injection well group again for the next cycle.

3. The deep reservoir energy development method according to claim 1, wherein Conducting first drilling and first fracturing on the target area based on the first geological parameters to obtain an injection well group, a first production well group, and a first fracture network, including: Determining construction parameters corresponding to the injection well and the first production well in the target area based on the first geological parameters, and drilling in the target area based on the construction parameters to obtain the injection well of the injection well group and the first production well of the first production well group; Determining first fracturing parameters corresponding to the target area based on the first geological parameters, and reforming the reservoir in the target area based on the injection well and the first production well through multi-branch radial horizontal well technology and volume fracturing technology to form the first horizontal well of the injection well group, multiple radial wells connected to the first horizontal well, the third horizontal well of the first production well group, multiple radial wells connected to the third horizontal well, and the first fracture network.

4. The deep reservoir energy development method according to claim 1, characterized in that, Conducting second drilling on the target area based on the second geological parameters and the first fracture network to obtain a second production well group, including: Constructing a geological model of the target area based on the second geological parameters and the first fracture network; Determining drilling construction parameters corresponding to the target area based on the geological model; Using the drilling construction parameters, drill a second production well and a plurality of second horizontal wells corresponding to the second production well in the target area; Determine a plurality of target positions on the main wellbore of each second horizontal well, and drill a plurality of radial wells for each second horizontal well based on each target position; Take the second production well, the plurality of second horizontal wells, and the plurality of radial wells connected to each second horizontal well as the second production well group.

5. The deep reservoir energy development method according to claim 4, wherein The second geological parameter includes the geological parameters at multiple moments during the first energy development in the target area and the first geological parameter; Correspondingly, based on the second geological parameter and the first fracture network, construct a geological model of the target area, including: Based on the geological parameters at the multiple moments, the first geological parameter, and the first fracture network, construct a geological model including the dynamic geological attributes at each position in the target area.

6. The deep reservoir energy development method according to claim 4, characterized in that, Perform a second fracturing based on the second production well group to obtain a second fracture network, and connect the first fracture network, the second fracture network, the injection well group, and the second production well group to obtain a third fracture network, including: Determine the second fracturing parameters corresponding to each radial well in the second production well group based on the geological model; Based on each radial well and the second fracturing parameters corresponding to each radial well, use the supercritical CO2 fracturing technology to fracture in a direction parallel to the minimum horizontal principal stress direction of each radial well and perpendicular to the maximum principal stress direction to obtain the second fracture network; Use the supercritical CO2 fracturing technology to connect the first fracture network, the second fracture network, the injection well group, and the second production well group to obtain a third fracture network.

7. The deep reservoir energy development method according to claim 1, characterized in that, Perform a second drilling on the target area based on the second geological parameter and the first fracture network, including: When it is determined that the second geological parameter meets the second preset condition, perform a second drilling on the target area based on the second geological parameter and the first fracture network; The second preset condition includes at least one of the following: the formation temperature gradient in the target area satisfies the first preset interval, the thickness of the heat reservoir layer in the target area satisfies the second preset interval, and the rock thermal conductivity in the target area satisfies the third preset interval.

8. An energy development device for deep reservoirs, characterized in that, Including: A first acquisition module for acquiring the first geological parameter of the target area to be subjected to energy development; A first transformation module for performing a first drilling and a first fracturing on the target area based on the first geological parameter to obtain an injection well group, a first production well group, and a first fracture network, and developing the first energy in the target area based on the first production well group and the first fracture network; A second acquisition module for acquiring the second geological parameter of the target area when it is determined that the first energy produced by the first production well group meets the first preset condition; A second transformation module for performing a second drilling on the target area based on the second geological parameter and the first fracture network to obtain a second production well group; A connection module, configured to perform a second fracturing based on the second production well group to obtain a second fracture network, and connect the first fracture network, the second fracture network, the injection well group, and the second production well group to obtain a third fracture network; A development module, configured to construct a heat storage system with supercritical CO2 as a circulating medium based on the injection well group, the second production well group, and the third fracture network, so as to utilize the heat storage system to conduct collaborative development of oil and gas, geothermal energy, and CO2 geological storage in the target area.

9. An electronic device, characterized in that, Comprising: A memory and a processor, where the processor and the memory are communicatively connected to each other, the memory stores computer instructions, and the processor implements the steps of the method according to any one of claims 1 to 7 by executing the computer instructions.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer program instructions, and when the computer program instructions are executed by the processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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