Integrated control method and system for preventing gas channeling

Abstract

This invention relates to the field of oilfield gas channeling prevention technology, providing a comprehensive control method and system for preventing gas channeling. The method includes: sealing existing gas channeling by determining an alternating water-gas injection method; conducting multiple rounds of experiments with this alternating water-gas injection method to determine the injection rounds; conducting experiments with different slug sizes for this alternating water-gas injection method to determine the alternating water-gas slugs; injecting the water-gas into the core reservoir according to the alternating water-gas injection method, injection rounds, and alternating water-gas slugs; and then injecting microspheres into the core reservoir to seal the high-permeability gas channeling formed by gas drive after the alternating water-gas injection method, achieving composite gas channeling control. This invention allows for the optimization of the optimal alternating water-gas injection process, the synthesis of high-temperature and salt-resistant emulsion polymer microspheres, and further deep-level regulation based on the alternating water-gas process, forming a composite gas channeling control system that can effectively seal gas channeling and improve displacement efficiency.

Description

Technical Field

[0001] This invention relates to the field of oilfield gas channeling prevention technology, and in particular to a comprehensive control method and system for preventing gas channeling. Background Technology

[0002] Currently, some offshore oil fields are gradually adopting gas-driven methods to improve oil recovery. Due to the heterogeneity of offshore oil field reservoirs and the strong breakthrough capability of gas itself, gas channeling has become an inevitable trend. Once serious gas channeling occurs, it will lead to ineffective subsequent gas-driven operations and reduce production efficiency.

[0003] Offshore gas-injected oilfields are generally low-to-medium permeability oilfields. Under long-term, high-intensity gas injection, the reservoir develops lateral tongues, making it extremely prone to gas channeling and forming gas channeling pathways. Currently, for gas channeling pathways formed in offshore oilfields, the method of alternating water and gas is often used for regulation and plugging, considering both economic and production benefits. However, this single method is often not ideal for gas channeling control under the special conditions of strong injection and production at sea. Summary of the Invention

[0004] The purpose of this invention is to solve at least one technical problem in the background art and to provide a comprehensive control method and system for preventing gas channeling.

[0005] To achieve the above objectives, the present invention provides a comprehensive control method for preventing gas channeling, comprising:

[0006] Inject gas into the Earth's core reservoir until gas channeling occurs, and then seal the gas channeling that has already occurred by determining the alternating water-gas injection method.

[0007] After determining the water-gas alternating injection method, multiple rounds of experiments were conducted to determine the number of injection rounds for this method.

[0008] After determining the water-gas alternating injection method and the number of injection cycles for this method, experiments were conducted on this water-gas alternating injection method with different slug sizes to determine the water-gas alternating slug.

[0009] Based on the alternating water-gas injection method, injection rounds, and alternating water-gas sluice gates, the core reservoir is injected. Microspheres are then introduced into the core reservoir to block the high-permeability gas channeling formed by gas drive after the alternating water-gas injection method, thereby achieving composite gas channeling control.

[0010] According to one aspect of the present invention, the water-air alternating injection method is: an injection method of air first and then water.

[0011] According to one aspect of the present invention, after determining the water-gas alternating injection method, conducting multiple rounds of experiments on the water-gas alternating injection method to determine the number of injection rounds of the water-gas alternating injection method includes:

[0012] After determining the gas-first-then-water injection method, multiple rounds of gas-first-then-water injection experiments were conducted, and the displacement efficiency of gas-first-then-water in each round was statistically analyzed.

[0013] The injection round with the largest increase in displacement efficiency compared to the previous round is selected as the injection round for the gas-first-water-second injection method.

[0014] According to one aspect of the present invention, the step of conducting experiments on the water-gas alternating injection method with different slug sizes after determining the water-gas alternating injection mode and the number of injection cycles of the water-gas alternating injection mode, to determine the water-gas alternating slug, includes:

[0015] After determining the gas-first-water injection method and the number of gas-first-water injection cycles, gas-first-water injection experiments were conducted with various slug sizes, and the displacement efficiency of each slug in the gas-first-water injection was statistically analyzed.

[0016] The sluice gate with the largest increase in displacement efficiency compared to the previous sluice gate was selected as the sluice gate for the gas-to-water injection method.

[0017] According to one aspect of the invention, the microspheres are emulsion polymerized microspheres with a mass concentration of 0.3 PV and a mass concentration of 2000 mg / L.

[0018] To achieve the above objectives, the present invention also provides a comprehensive control system for preventing gas channeling, comprising:

[0019] The water-gas injection method determination module injects gas into the Earth's core reservoir until gas channeling occurs, and seals the gas channeling that has already occurred by determining the alternating water-gas injection method.

[0020] The injection round determination module determines the water-air alternating injection method, conducts multiple rounds of experiments on this water-air alternating injection method, and determines the injection rounds of this water-air alternating injection method.

[0021] The slug determination module, after determining the water-gas alternating injection method and the number of injection cycles for that method, conducts experiments on the water-gas alternating injection method with different slug sizes to determine the water-gas alternating slug.

[0022] The composite gas channeling control module injects water and gas into the core reservoir according to the water-gas alternating injection method, injection rounds, and water-gas alternating sluices. Based on the water-gas alternating injection method, injection rounds, and water-gas alternating sluices, microspheres are injected into the core reservoir to block the high-permeability gas channeling formed by gas drive after the water-gas alternating injection method, thereby achieving composite gas channeling control.

[0023] To achieve the above objectives, the present invention also provides an electronic device, including a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the comprehensive control method for preventing gas channeling as described above.

[0024] To achieve the above objectives, the present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the comprehensive control method for preventing gas channeling as described above.

[0025] According to the present invention, this invention addresses how to seal gas channeling in gas-injected oilfields under high-temperature and high-salt marine environments. By optimizing the water-gas alternation injection method, cycles, and slug method, the optimal water-gas alternation injection process is selected. Based on this, high-temperature and salt-resistant emulsion polymer microspheres are synthesized. Further deep-level regulation is then applied to the water-gas alternation process, forming a composite gas channeling control system that can effectively seal gas channeling and improve displacement efficiency.

[0026] According to the present invention, based on current offshore low-to-medium permeability gas injection oilfields, this invention considers optimizing the water-gas alternation control method, optimizing the water-gas alternation mode, cycle, and slug size. Considering the high temperature and high salinity characteristics of offshore environments, an emulsion polymerization method is considered for the microspheres, introducing siloxanes. Siloxanes have high heat resistance and good weather resistance. Furthermore, 2-acrylamido-2-methylpropanesulfonic acid (AMPS), due to its special structure and the presence of salt-insensitive sulfonic acid groups, improves the salt resistance of the microspheres. Therefore, emulsion polymerization is used to prepare microspheres containing siloxanes and AMPS. Based on the optimized two plugging methods, combined regulation is implemented to effectively control gas channeling and thus improve oil recovery. Attached Figure Description

[0027] Figure 1 A flowchart illustrating a comprehensive control method for preventing gas channeling according to an embodiment of the present invention;

[0028] Figure 2 This is a graph showing the relationship between displacement efficiency and injection method in Example 1;

[0029] Figure 3 The displacement efficiency of Example 1 and Figure 2 PV number relationship diagram under injection method;

[0030] Figure 4 This is a graph showing the relationship between displacement efficiency and injection rounds in Example 1;

[0031] Figure 5 The displacement efficiency of Example 1 and Figure 4 PV count relationship diagram under injection rounds;

[0032] Figure 6 This is a graph showing the relationship between displacement efficiency and slug size in Example 1;

[0033] Figure 7 The displacement efficiency of Example 1 and Figure 6 PV number relationship graph under slug size;

[0034] Figure 8 This is a graph showing the relationship between displacement efficiency and final injection form in Example 1;

[0035] Figure 9 The displacement efficiency of Example 1 and Figure 8 PV number relationship diagram under the final injection form. Detailed Implementation

[0036] The invention will now be discussed with reference to exemplary embodiments. It should be understood that the described embodiments are merely intended to enable those skilled in the art to better understand and thus implement the invention, and are not intended to imply any limitation on the scope of the invention.

[0037] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment".

[0038] Figure 1 The flowchart schematically illustrates a comprehensive control method for preventing gas channeling according to one embodiment of the present invention. Figure 1 As shown, in this embodiment, the comprehensive control method for preventing gas channeling includes:

[0039] Inject gas into the Earth's core reservoir until gas channeling occurs, and then seal the gas channeling that has already occurred by determining the alternating water-gas injection method.

[0040] After determining the water-gas alternating injection method, multiple rounds of experiments were conducted to determine the number of injection rounds for this method.

[0041] After determining the water-gas alternating injection method and the number of injection cycles for this method, experiments were conducted on this water-gas alternating injection method with different slug sizes to determine the water-gas alternating slug.

[0042] Based on the alternating water-gas injection method, injection cycles, and alternating water-gas slugs, core reservoirs are injected. Microspheres are then introduced into the core reservoir to block high-permeability gas channeling that occurs during gas drive following the alternating water-gas injection method, achieving composite gas channeling control. This setup allows for the optimization of the optimal alternating water-gas injection process, and the synthesis of high-temperature and salt-resistant emulsion polymerized microspheres. Further deep-level regulation is then implemented on top of the alternating water-gas injection, forming a composite gas channeling control system that effectively blocks gas channeling and improves displacement efficiency.

[0043] Furthermore, according to one embodiment of the present invention, the water-air alternating injection method is: an injection method of air first and then water, that is, air-water alternating injection.

[0044] Furthermore, according to one embodiment of the present invention, after determining the water-air alternating injection method, multiple rounds of experiments are conducted on the water-air alternating injection method to determine the number of injection rounds of the water-air alternating injection method, including:

[0045] After determining the gas-first-then-water injection method, multiple rounds of gas-first-then-water injection experiments were conducted, and the displacement efficiency of gas-first-then-water in each round was statistically analyzed.

[0046] The injection round that yields the largest increase in displacement efficiency compared to the previous round is selected as the injection round in the gas-first, water-second injection method. This setting allows for effective improvement of displacement efficiency by determining the optimal injection round.

[0047] Furthermore, according to one embodiment of the present invention, after determining the water-gas alternating injection method and the number of injection cycles of the water-gas alternating injection method, experiments are conducted on the water-gas alternating injection method with different slug sizes to determine the water-gas alternating slug, including:

[0048] After determining the gas-first-water injection method and the number of gas-first-water injection cycles, gas-first-water injection experiments were conducted with various slug sizes, and the displacement efficiency of each slug in the gas-first-water injection was statistically analyzed.

[0049] The sluice gate with the largest increase in displacement efficiency compared to the previous sluice gate is selected as the sluice gate for the gas-to-water injection method. This setting allows for effective improvement of displacement efficiency by determining the optimal sluice gate.

[0050] Furthermore, according to one embodiment of the present invention, the microspheres are emulsion polymerized microspheres with a mass concentration of 0.3 PV and a mass concentration of 2000 mg / L.

[0051] According to the above-described scheme of the present invention, the present invention addresses how to seal gas channeling in gas injection oilfields under high temperature and high salinity environments at sea. By optimizing the water-gas alternation injection method, cycle, and slug method, the optimal water-gas alternation injection process is selected. Based on this, high temperature and salt resistant emulsion polymer microspheres are synthesized. Further deep displacement is then achieved on the basis of water-gas alternation, forming a composite gas channeling control system that can effectively seal gas channeling and improve displacement efficiency.

[0052] According to the above-described scheme of this invention, based on current offshore low-to-medium permeability gas injection oilfields, this invention considers optimizing the water-gas alternation control method, optimizing the water-gas alternation mode, cycle, and slug size. Considering the high temperature and high salinity characteristics of offshore environments, an emulsion polymerization method is considered for the microspheres, introducing siloxanes. Siloxanes have high heat resistance and good weather resistance. Furthermore, 2-acrylamido-2-methylpropanesulfonic acid (AMPS), due to its special structure and the presence of salt-insensitive sulfonic acid groups, improves the salt resistance of the microspheres. Therefore, emulsion polymerization is used to prepare microspheres containing siloxanes and AMPS. Based on the optimized two plugging methods, combined regulation is carried out to effectively control gas channeling and thus improve oil recovery.

[0053] Furthermore, to achieve the above objectives, the present invention also provides a comprehensive control system for preventing gas channeling, comprising:

[0054] The water-gas injection method determination module injects gas into the Earth's core reservoir until gas channeling occurs, and seals the gas channeling that has already occurred by determining the alternating water-gas injection method.

[0055] The injection round determination module determines the water-air alternating injection method, conducts multiple rounds of experiments on this water-air alternating injection method, and determines the injection rounds of this water-air alternating injection method.

[0056] The slug determination module, after determining the water-gas alternating injection method and the number of injection cycles for that method, conducts experiments on the water-gas alternating injection method with different slug sizes to determine the water-gas alternating slug.

[0057] The composite gas channeling control module injects water and gas into the core reservoir based on the alternating water-gas injection method, injection cycles, and alternating water-gas slugs. Microspheres are then introduced into the core reservoir to block high-permeability gas channeling that occurs during gas drive following the alternating water-gas injection method, thus achieving composite gas channeling control. This setup allows for the optimization of the optimal alternating water-gas injection process, followed by the synthesis of high-temperature and salt-resistant emulsion polymerized microspheres. Further deep-level regulation is then implemented on top of the alternating water-gas injection, forming a composite gas channeling control system that effectively blocks gas channeling and improves displacement efficiency.

[0058] Furthermore, according to one embodiment of the present invention, the water-air alternating injection method is: an injection method of air first and then water, that is, air-water alternating injection.

[0059] Furthermore, according to one embodiment of the present invention, after determining the water-air alternating injection method, multiple rounds of experiments are conducted on the water-air alternating injection method to determine the number of injection rounds of the water-air alternating injection method, including:

[0060] After determining the gas-first-then-water injection method, multiple rounds of gas-first-then-water injection experiments were conducted, and the displacement efficiency of gas-first-then-water in each round was statistically analyzed.

[0061] The injection round that yields the largest increase in displacement efficiency compared to the previous round is selected as the injection round in the gas-first, water-second injection method. This setting allows for effective improvement of displacement efficiency by determining the optimal injection round.

[0062] Furthermore, according to one embodiment of the present invention, after determining the water-gas alternating injection method and the number of injection cycles of the water-gas alternating injection method, experiments are conducted on the water-gas alternating injection method with different slug sizes to determine the water-gas alternating slug, including:

[0063] After determining the gas-first-water injection method and the number of gas-first-water injection cycles, gas-first-water injection experiments were conducted with various slug sizes, and the displacement efficiency of each slug in the gas-first-water injection was statistically analyzed.

[0064] The sluice gate with the largest increase in displacement efficiency compared to the previous sluice gate is selected as the sluice gate for the gas-to-water injection method. This setting allows for effective improvement of displacement efficiency by determining the optimal sluice gate.

[0065] Furthermore, according to one embodiment of the present invention, the microspheres are emulsion polymerized microspheres with a mass concentration of 0.3 PV and a mass concentration of 2000 mg / L.

[0066] According to the above-described scheme of the present invention, the present invention addresses how to seal gas channeling in gas injection oilfields under high temperature and high salinity environments at sea. By optimizing the water-gas alternation injection method, cycle, and slug method, the optimal water-gas alternation injection process is selected. Based on this, high temperature and salt resistant emulsion polymer microspheres are synthesized. Further deep displacement is then achieved on the basis of water-gas alternation, forming a composite gas channeling control system that can effectively seal gas channeling and improve displacement efficiency.

[0067] According to the above-described scheme of this invention, based on current offshore low-to-medium permeability gas injection oilfields, this invention considers optimizing the water-gas alternation control method, optimizing the water-gas alternation mode, cycle, and slug size. Considering the high temperature and high salinity characteristics of offshore environments, an emulsion polymerization method is considered for the microspheres, introducing siloxanes. Siloxanes have high heat resistance and good weather resistance. Furthermore, 2-acrylamido-2-methylpropanesulfonic acid (AMPS), due to its special structure and the presence of salt-insensitive sulfonic acid groups, improves the salt resistance of the microspheres. Therefore, emulsion polymerization is used to prepare microspheres containing siloxanes and AMPS. Based on the optimized two plugging methods, combined regulation is carried out to effectively control gas channeling and thus improve oil recovery.

[0068] Furthermore, to achieve the above objectives, the present invention also provides an electronic device, including a processor, a memory, and a computer program stored in the memory and executable on the processor. When the computer program is executed by the processor, it implements the comprehensive control method for preventing gas channeling as described above.

[0069] Furthermore, to achieve the above objectives, the present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the comprehensive control method for preventing gas channeling as described above.

[0070] Furthermore, based on the above-described solution of the present invention, the technical solution of the present invention will be described in detail below with reference to the accompanying drawings in a specific embodiment.

[0071] Example 1

[0072] Comprehensive control methods for preventing gas channeling include:

[0073] (1) Determine the water-air alternating injection method

[0074] Natural gas was injected until gas channeling occurred, then water-gas alternation was initiated with a slug displacement of 0.2 PV and a slug ratio of 1:1. Subsequent post-gas drive was then performed until severe gas channeling occurred. (Evaluation methods refer to SY / T5590-2004 "Evaluation Method for Profile Control Agents"). Experimental results are shown in Table 1 below. Figure 1 and Figure 2 .

[0075]

[0076] Table 1

[0077] As shown in Table 1, water-air alternation can effectively delay gas channeling and improve displacement efficiency by more than 10%. Regarding the water-air alternation method, the gas-then-water injection method is slightly more efficient than the water-then-gas injection method. Therefore, this embodiment determines the water-air alternation injection method as the gas-then-water injection method, i.e., gas-water alternation injection. Figure 1 and Figure 2Data shows that the displacement efficiency of the three methods is the same in the initial stage of gas injection. Gas channeling occurs when the injection volume reaches 0.38 PV, at which point the displacement efficiency gradually decreases. During the injection volume of 0.38 PV to 0.63 PV, a water-gas alternation stage begins. Gas-water alternation injection and water-gas alternation injection have slightly higher displacement efficiency than continuous gas injection. In the later gas drive stage, the continuous gas injection method experiences severe gas channeling, leading to ineffective gas drive. The displacement efficiency of gas-water alternation injection and water-gas alternation injection continues to increase, with severe gas channeling occurring at 0.76 PV and 0.74 PV, respectively, resulting in subsequent ineffective gas drive. The injection cause analysis is that in the early continuous gas drive, a large amount of natural gas dissolves in the crude oil, reducing the viscosity of the crude oil and the interfacial tension between the two phases. Therefore, a large amount of crude oil is displaced, resulting in a large increase in displacement efficiency in the early stage. In the water-gas alternation stage, since the continuous gas injection method does not include a slug, gas channeling begins to occur, and the oil displacement efficiency gradually decreases. In the later gas drive stage, severe gas channeling occurs, forming a gas channeling channel that leads to ineffective gas drive. When the injection method is water-gas alternating injection or gas-water alternating injection, the gas channeling that occurred during the early gas injection and oil production is blocked by water, which delays the occurrence of gas channeling. In the later gas drive stage, the gas channeling is not obvious. Due to the effective blocking of water, the sweep efficiency of natural gas is expanded. It comes into contact with crude oil in a relatively low permeable layer, reducing viscosity and interfacial tension, thereby improving the displacement efficiency.

[0078] (2) Determine the injection cycles for alternating gas and water injection.

[0079] The first, second, and third rounds of gas-water alternating injection experiments were conducted under the conditions of alternating gas and water injection, slug size of 0.2 PV, and slug ratio of 1:1. (For evaluation methods, please refer to SY / T5590-2004 "Evaluation Method for Profile Control Agents"). The experimental results are shown in Table 2 below. Figure 3 and Figure 4 .

[0080]

[0081] Table 2

[0082] From Table 2 and Figure 3 , Figure 4Data shows that the number of gas-water alternating injection rounds has a certain impact on the displacement efficiency. The displacement efficiencies of the three rounds are 44.86%, 51.9%, and 52.5%, respectively. The second and third rounds show a more significant improvement in displacement efficiency compared to the first round, with an increase of about 5% to 6%. The displacement efficiency of the third round is 0.4% higher than that of the second round, but the overall difference is not significant. Therefore, this embodiment determines the number of injection rounds for gas-water alternating injection to be two rounds. The reason is that in the gas-water alternating injection stage, the displacement efficiency of multiple rounds is higher than that of a single round because frequent gas-water alternation can enhance the exchange between gas and liquid molecules, achieve a near-miscible state through multiple contacts, reduce viscosity, increase crude oil volume, change the flow properties of crude oil, and expand the swept volume. However, the reason why excessively frequent gas-water alternation has little displacement effect is that the overall slug remains unchanged, and the injection volume in each round is not large. This results in a slightly weaker sealing effect of the water slug, making it easier for gas to break through.

[0083] (3) Determine the water-air alternation section

[0084] An alternating gas-water injection experiment was conducted with different slug sizes under the conditions of alternating gas-water injection method, two injection cycles, and a slug ratio of 1:1. (For evaluation methods, please refer to SY / T5590-2004 "Evaluation Method for Profile Control Agents"). The experimental results are shown in Table 3 and... Figure 5 and Figure 6 .

[0085]

[0086] Table 3

[0087] From Table 3, Figure 5 and Figure 6 Data shows that the gas-water alternating slug has a significant impact on displacement efficiency. The larger the gas-water alternating slug, the higher the displacement efficiency. When the slug reaches 0.2 PV, the increase in displacement efficiency slows down. The final displacement efficiencies of the three types of slugs are 42.88%, 51.05%, and 54.09%, respectively. Therefore, this embodiment determines the gas-water alternating slug size to be 0.2 PV. The reasons are as follows: Firstly, natural gas can contact and mix with the crude oil in the core, achieving viscosity reduction and increasing the crude oil volume, thus improving displacement efficiency. Smaller slugs also lead to smaller gas injection slugs and water slugs. Smaller gas slugs have less contact with crude oil, resulting in lower displacement efficiency compared to larger slugs. Secondly, because water slugs can block gas channeling, smaller water slugs are more prone to gas channeling, and the effect of expanding the affected volume is less effective. Therefore, smaller slugs result in lower displacement efficiency.

[0088] (4) Blocking properties of emulsion polymerized microspheres

[0089] Emulsion polymerized microspheres with a mass concentration of 2000 mg / L and a mass of 0.3 PV were injected forward at 20, 30, and 50 mD, respectively. After 7 days of curing, the permeability of the aqueous phase was measured by injecting simulated formation water. (For evaluation methods, please refer to SY / T5590-2004 "Performance Evaluation Method of Profile Modifiers"). The experimental results are shown in Table 4.

[0090]

[0091] Table 4

[0092] Data shows that microsphere injection systems with three different permeability levels can effectively plug reservoirs in medium and low permeability conditions, with a plugging rate of over 95%.

[0093] (5) Integrated treatment of alternating gas-water injection and microsphere injection

[0094] A composite regulation experiment was conducted under the following conditions: alternating gas-water injection method, two injection cycles, slug size of 0.2 PV, microsphere slug size of 0.3 PV, and mass concentration of 2000 mg / L. (Evaluation methods refer to SY / T5590-2004 "Evaluation Method for Profile Control Agents"). The experimental results are shown in Table 5 and... Figure 7 and Figure 8 .

[0095]

[0096]

[0097] Table 5

[0098] From Table 5, Figure 7 and Figure 8 Data shows that the displacement efficiency of continuous gas drive is 37.35%. Adding a optimized gas-water alternating slug further increases the displacement efficiency to 51.05%. Further enhancing the sealing effect by adding microspheres during the gas-water alternation process results in a displacement efficiency of 76.42%, representing a 24.5% increase compared to the gas-water alternation method. The reason for this is that adding microspheres after the gas-water alternation process effectively blocks the gas migration channels. During microsphere injection, the microspheres migrate towards the channels with higher permeability, i.e., the gas migration channels. At this point, the microspheres absorb water and expand, thus sealing the gas migration pathways and increasing the swept volume, thereby improving the displacement efficiency.

[0099] Those skilled in the art will recognize that the modules and algorithm steps described in conjunction with the embodiments disclosed herein can be implemented using electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0100] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the above-described apparatus and equipment can be referred to the corresponding process in the foregoing method implementation, and will not be repeated here.

[0101] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or modules may be electrical, mechanical, or other forms.

[0102] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical modules; that is, they may be located in one place or distributed across multiple network modules. Some or all of the modules can be selected to achieve the objectives of the embodiments of the present invention, depending on actual needs.

[0103] In addition, the functional modules in the embodiments of the present invention can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module.

[0104] If the aforementioned functions are implemented as software functional modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the energy-saving signal transmission / reception methods of various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0105] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this application.

[0106] It should be understood that the sequence number of each step in the invention and its embodiments does not absolutely imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

Claims

1. A comprehensive control method for preventing gas channeling, characterized in that, include: Inject gas into the Earth's core reservoir until gas channeling occurs, and then seal the gas channeling that has already occurred by determining the alternating water-gas injection method. After determining the water-gas alternating injection method, multiple rounds of experiments were conducted to determine the number of injection rounds for this method. After determining the water-gas alternating injection method and the number of injection cycles for this method, experiments were conducted on this water-gas alternating injection method with different slug sizes to determine the water-gas alternating slug. Based on the alternating water-gas injection method, injection rounds, and alternating water-gas sluice gates, the core reservoir is injected. Microspheres are then introduced into the core reservoir to block the high-permeability gas channeling formed by gas drive after the alternating water-gas injection method, thereby achieving composite gas channeling control. The water-air alternating injection method is: an injection method of air first and then water; After determining the water-gas alternating injection method, multiple rounds of experiments are conducted using this method to determine the number of injection rounds, including: After determining the gas-first-then-water injection method, multiple rounds of gas-first-then-water injection experiments were conducted, and the displacement efficiency of gas-first-then-water in each round was statistically analyzed. The round with the largest increase in displacement efficiency compared to the previous round is selected as the injection round for the gas-first-water injection method. After determining the water-gas alternating injection method and the number of injection cycles for that method, experiments are conducted on the water-gas alternating injection method with different slug sizes to determine the water-gas alternating slug, including: After determining the gas-first-water injection method and the number of gas-first-water injection cycles, gas-first-water injection experiments were conducted with various slug sizes, and the displacement efficiency of each slug in the gas-first-water injection was statistically analyzed. The sluice gate with the largest increase in displacement efficiency compared to the previous sluice gate was selected as the sluice gate for the gas-to-water injection method.

2. The comprehensive control method for preventing gas channeling according to claim 1, characterized in that, The microspheres are emulsion polymerized microspheres with a mass concentration of 0.3 PV and a mass concentration of 2000 mg / L.

3. A comprehensive control system for preventing gas leakage, characterized in that, include: The water-gas injection method determination module injects gas into the Earth's core reservoir until gas channeling occurs, and seals the gas channeling that has already occurred by determining the alternating water-gas injection method. The injection round determination module determines the water-air alternating injection method, conducts multiple rounds of experiments on this water-air alternating injection method, and determines the injection rounds of this water-air alternating injection method. The slug determination module, after determining the water-gas alternating injection method and the number of injection cycles for that method, conducts experiments on the water-gas alternating injection method with different slug sizes to determine the water-gas alternating slug. The composite gas channeling control module injects water and gas into the core reservoir according to the water-gas alternating injection method, injection rounds, and water-gas alternating sluices. Based on the water-gas alternating injection method, injection rounds, and water-gas alternating sluices, microspheres are injected into the core reservoir to block the high-permeability gas channeling formed by gas drive after the water-gas alternating injection method, thereby achieving composite gas channeling control. The water-air alternating injection method is: an injection method of air first and then water; After determining the water-gas alternating injection method, multiple rounds of experiments are conducted using this method to determine the number of injection rounds, including: After determining the gas-first-then-water injection method, multiple rounds of gas-first-then-water injection experiments were conducted, and the displacement efficiency of gas-first-then-water in each round was statistically analyzed. The round with the largest increase in displacement efficiency compared to the previous round is selected as the injection round for the gas-first-water injection method. After determining the water-gas alternating injection method and the number of injection cycles for that method, experiments are conducted on the water-gas alternating injection method with different slug sizes to determine the water-gas alternating slug, including: After determining the gas-first-water injection method and the number of gas-first-water injection cycles, gas-first-water injection experiments were conducted with various slug sizes, and the displacement efficiency of each slug in the gas-first-water injection was statistically analyzed. The sluice gate with the largest increase in displacement efficiency compared to the previous sluice gate was selected as the sluice gate for the gas-to-water injection method.

4. An electronic device, characterized in that, It includes a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the comprehensive control method for preventing gas channeling as described in claim 1 or 2.

5. A computer-readable storage medium, characterized in that, A computer program is stored on the computer-readable storage medium, which, when executed by a processor, implements the comprehensive control method for preventing gas channeling as described in claim 1 or 2.

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