Three-dimensional visual heating constant temperature simulation device and oil and gas resource constant temperature displacement simulation method

Abstract

The application belongs to the technical field of oilfield displacement, and discloses a three-dimensional visual heating constant-temperature simulation device and an oil and gas resource constant-temperature displacement simulation method, which are used for simulating the displacement process of oil and gas resources such as oil reservoirs and gas reservoirs, and comprise a supporting platform, a reaction kettle and a heating mechanism. The reaction kettle comprises a kettle main body and a visual assembly, the kettle main body is connected with the supporting platform, the kettle main body is internally provided with a containing cavity, the kettle main body is provided with a first through hole and a first opening, the first through hole and the first opening are both communicated with the containing cavity, the first through hole and the first opening are each provided with at least two, each first opening is connected with one visual assembly, the visual assembly is detachably connected with the kettle main body, and the visual assembly can block the first opening; the heating mechanism is connected with the kettle main body, and the heating mechanism can heat the containing cavity. The three-dimensional visual heating constant-temperature simulation device can heat the containing cavity to simulate the high-temperature state of the formation, and simultaneously realize the visualization of the whole process and multiple angles.

Description

Technical Field

[0001] This invention relates to the field of oilfield displacement technology, and in particular to a three-dimensional visual heating and isothermal simulation device and a method for isothermal displacement simulation of oil and gas resources. Background Technology

[0002] Oil and gas resources are among my country's important mineral resources. Achieving efficient exploitation of oil and gas resources has always been an important research direction for my country's petroleum industry. This requires, on the one hand, to formulate reasonable development strategies for newly discovered oil fields to maintain high and stable production for as long as possible; and on the other hand, to continuously extend into complex areas such as deep, unconventional, and old oil fields.

[0003] Displacement is a common method used in oil and gas extraction. Displacement refers to the introduction of a foreign fluid to replace oil and gas in the formation, thereby moving the oil and gas to the bottom of the well to achieve extraction. Displacement is one of the important methods in oil and gas extraction. Therefore, when dealing with large oil fields, it is necessary to simulate the displacement process before actual extraction to evaluate the development strategy and the effectiveness of enhanced oil recovery.

[0004] Currently, there are many evaluation methods, among which three-dimensional visualization physical simulation is the most intuitive. However, current three-dimensional visualization physical simulation experimental methods can only simulate high-pressure formation conditions under normal temperature conditions, and cannot achieve high-temperature simulation conditions. This leads to certain limitations; it cannot realistically reproduce the seepage process under real formation conditions, and it also has certain difficulties in achieving the supercritical state of gases such as CO2, making it difficult to accurately simulate the gas drive process. If closed heating equipment such as ovens is used, it will restrict the experimental space, making it inconvenient to record the experimental process, and it is also difficult for experimental personnel to operate the experimental device during the experiment without disturbing the temperature of the experimental device. Summary of the Invention

[0005] The purpose of this invention is to provide a three-dimensional visual heating and constant temperature simulation device to solve the technical problem that existing three-dimensional visual physical simulation experimental methods can only simulate high-pressure strata conditions under normal temperature conditions, but cannot achieve high-temperature simulation conditions.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A three-dimensional visual heating and constant temperature simulation device is used to simulate the displacement process of oil and gas resources such as oil reservoirs and gas reservoirs, including:

[0008] Support platform;

[0009] A reaction vessel includes a vessel body and a viewing component. The vessel body is connected to the support platform. The vessel body has an internal accommodating cavity. The vessel body has a first through hole and a first opening. Both the first through hole and the first opening are connected to the accommodating cavity. The medium can enter and exit the accommodating cavity 211 through the first through hole 212. There are at least two of each of the first through holes and the first opening. Each first opening is connected to a viewing component. The viewing component is detachably connected to the vessel body. The viewing component can block the first opening.

[0010] A heating mechanism is connected to the main body of the vessel, and the heating mechanism is capable of heating the cavity.

[0011] Preferably, the vessel body is cuboid, each side of the vessel body has a first opening, the support platform has a second opening, one of the first openings is located at the second opening, and the visual component can be inserted through the second opening.

[0012] Preferably, the heating mechanism includes a heating component and a heat preservation and protection component. The heating component is connected to the main body of the reactor, and the heat preservation and protection component is sleeved on the outside of the reactor. The heat preservation and protection component is provided with six third openings, each of which corresponds to one of the first openings. The visible component can be inserted through the third openings.

[0013] Preferably, the heating assembly includes a plurality of heating blocks, heating elements and connecting elements. The heating blocks are disposed around the first opening, and adjacent heating blocks are connected by the connecting elements. Each heating block has a receiving hole inside, and the heating element is inserted into the receiving hole.

[0014] Preferably, the thermal insulation and protection assembly includes a protective shell, a thermal insulation layer, and a locking component. The thermal insulation layer is disposed between the reactor and the protective shell. The protective shell is a split structure, formed by at least two protective units. Adjacent protective units can form the third opening. The locking component can selectively lock adjacent protective units.

[0015] Preferably, the visual component includes a viewing glass, a glass cover frame, and a viewing guard plate. The viewing glass is disposed at the first opening, the glass cover frame is connected to the vessel body, the viewing glass is sandwiched between the glass cover frame and the vessel body, and the viewing guard plate is disposed on the side of the glass cover frame away from the viewing glass.

[0016] Preferably, the glass cover frame is provided with a viewing hole and a plurality of first connecting holes, which are evenly spaced around the viewing hole. The vessel body is provided with a plurality of second connecting holes, which are evenly spaced around the first opening. The first connecting holes and the second connecting holes correspond one-to-one and are connected by bolts.

[0017] Preferably, the visual component further includes a seal, and a sealing groove is provided on the periphery of each first opening, the seal being disposed in the sealing groove.

[0018] Preferably, the system also includes a recording mechanism, which includes a support frame and a recording component. The recording component is slidably connected to the support frame, and the support frame is connected to the glass cover frame.

[0019] Preferably, the support frame includes two support rods, the recording assembly includes a camera and a slider, the camera is detachably connected to the slider, the slider is provided with two second through holes, the support rods are inserted into the second through holes and slidably connected to the second through holes, and the camera is configured to record the state in the accommodating cavity.

[0020] The purpose of this invention is to provide a method for simulating isothermal displacement of oil and gas resources, in order to solve the technical problem that existing three-dimensional visualization physical simulation experimental methods can only simulate high-pressure formation conditions under normal temperature conditions, but cannot achieve high-temperature simulation conditions.

[0021] The isothermal displacement simulation method for oil and gas resources, employing the three-dimensional visual heating isothermal simulation device as described above, includes:

[0022] S1: Fill the accommodating cavity with molding sand and tools through the first opening;

[0023] S2: Evacuate the cavity using a vacuum pump;

[0024] S3: Use a displacement pump to inject crude oil into the accommodating cavity through the first opening until the pressure value specified in the experiment is reached;

[0025] S4: The accommodating cavity is heated by the heating mechanism until the temperature inside the accommodating cavity reaches the set temperature;

[0026] S5: Intermittently acquire images of the accommodating cavity;

[0027] S6: According to the injection and production location, injection and production rate and injection medium determined by the experimental plan, the injection medium is injected into the accommodating cavity through a first through hole. The crude oil is displaced by the injection medium and discharged through another first through hole, and the parameters are recorded.

[0028] S7: After oil production stops, clean the three-dimensional injection and production development physical simulation device, adjust the injection and production position, injection and production speed and injection medium, and repeat S1-S5 to conduct the next round of experiments.

[0029] Beneficial Effects: This invention provides a three-dimensional visual heating and constant temperature simulation device, including a support platform, a reaction vessel, and a heating mechanism. The support platform supports the reaction vessel, positioning it at a certain height for convenient observation and recording. The reaction vessel includes a vessel body and a viewing component. The vessel body has at least two first openings for researchers to observe the simulated displacement process within the internal cavity. Each opening is connected to a viewing component, ensuring the vessel body remains airtight while allowing researchers to observe the cavity without obstructing their view. The vessel body also has at least two first through holes for simulating a well network during the displacement process, facilitating the entry and exit of the medium. The heating mechanism heats the cavity to simulate a high-temperature environment, enabling the experimental gas to reach a supercritical state for gas-driven experiments. By providing at least two first openings, the vessel body allows researchers to observe the simulated displacement process within the cavity from multiple angles, obtaining more complete and comprehensive information. Combined with the at least two first through holes, it can simulate displacement processes with different well network combinations. The three-dimensional visual heating and constant temperature simulation device can simulate displacement processes under different geological features, injection media, displacement environments, well patterns, and production regimes in three dimensions. It can also heat the containment chamber to simulate the high-temperature state of the formation, avoiding the use of sealed heating equipment such as ovens. This facilitates recording the experimental process, and operators can manipulate the device at any time during the experiment without interfering with the internal temperature of the model, ensuring the accuracy of the experiment. It achieves full-process, multi-angle visualization, allowing for more intuitive and quantitative studies of the impact of various factors on oil and gas resource extraction, and enabling more accurate simulation of formation conditions in three-dimensional visualization experiments.

[0030] This invention provides a method for simulating isothermal displacement of oil and gas resources. The method involves filling a cavity with molding sand and tools to simulate the three-dimensional state of the formation, then evacuating the cavity to make the environment more closely resemble the real formation. Crude oil is then injected into the cavity to simulate the formation's oil and gas reservoir. A heating mechanism is used to heat the cavity to reach a set temperature, making the simulated formation's oil and gas reservoir more realistic. The high temperature in the cavity also allows the experimental gas to reach a supercritical state for gas drive experiments. The conditions within the cavity are recorded at intervals to ensure continuous data acquisition. The actual displacement process is simulated by injecting a medium. As the medium enters, crude oil is displaced from the cavity, completing one displacement simulation experiment. Finally, the cavity is cleaned, and the injection / production position, injection / production rate, and injection medium are adjusted for the next experiment. The three-dimensional visual heating and constant temperature simulation device enables the simulation experiment to simulate the geological conditions under high temperature, making the experiment closer to the actual situation; it avoids the use of closed heating equipment such as ovens, facilitates the recording of the experimental process, and allows operators to operate the experimental device at any time during the experiment without interfering with the internal temperature of the model, thus ensuring the accuracy of the experiment. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the three-dimensional visual heating and constant temperature simulation device provided in the embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram showing the cooperation of the support platform, reaction vessel, and heating components provided in an embodiment of the present invention;

[0033] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0034] Figure 4 This is a schematic diagram of the cooperation between the reaction vessel and the support platform provided in an embodiment of the present invention;

[0035] Figure 5 yes Figure 4 Enlarged view of point B in the middle;

[0036] Figure 6 This is a partial exploded view of the reaction vessel provided in an embodiment of the present invention;

[0037] Figure 7 This is a partial cross-sectional view of the reaction vessel provided in an embodiment of the present invention;

[0038] Figure 8 yes Figure 4 A magnified view of point C in the middle.

[0039] In the picture:

[0040] 1. Support platform; 12. Second opening;

[0041] 21. Main body of the vessel; 211. Receiving cavity; 212. First through hole; 213. First opening; 214. Second connecting hole; 215. Sealing groove; 216. Hexagonal threaded plug;

[0042] 22. Visible component; 221. Visible glass; 222. Glass cover frame; 2221. Viewing hole; 2222. First connecting hole; 223. Visible protective plate;

[0043] 31. Heating assembly; 311. Heating block; 312. Heating element; 313. Connecting component;

[0044] 32. Thermal insulation and protection components; 321. Protective shell; 3211. Protective unit; 323. Locking components;

[0045] 4. Camera / recording mechanism; 41. Support frame; 411. Support rod; 412. Connecting rod; 42. Camera / recording assembly; 421. Camera; 422. Sliding component;

[0046] 5. Lighting components. Detailed Implementation

[0047] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0048] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0049] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0050] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0051] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0052] Current three-dimensional visualization physical simulation methods can only simulate high-pressure formation conditions at room temperature, and cannot achieve high-temperature simulation. This results in certain limitations; they cannot realistically reproduce the seepage process under actual formation conditions, and there are also difficulties in achieving the supercritical state of gases such as CO2, making it difficult to accurately simulate gas-driven processes. If closed heating equipment such as ovens is used, it will restrict the experimental space, making it inconvenient to record the experimental process, and it is also difficult for researchers to operate the experimental device during the experiment without disturbing the temperature of the device.

[0053] refer to Figures 1-5 This invention provides a three-dimensional visual heating and constant temperature simulation device for simulating the displacement of oil and gas resources such as oil and gas reservoirs. It includes a support platform 1, a reaction vessel, a heating mechanism, and a recording mechanism 4. The support platform 1 supports the reaction vessel, positioning it at a certain height for easy observation by experimental personnel. The reaction vessel simulates the displacement process in three dimensions, making the simulated displacement process closer to reality. Experimenters can observe the simulated situation inside the reaction vessel from multiple angles. The heating mechanism simulates the high-temperature conditions of the formation by heating the reaction vessel. The recording mechanism 4 records the simulation process, allowing experimental personnel to repeatedly view and analyze it to draw more accurate conclusions.

[0054] Specifically, the reactor includes a reactor body 21, a visual component 22, and a heating mechanism. The reactor body 21 is connected to the support platform 1. The reactor body 21 has a accommodating cavity 211 inside, which is used to fill molding sand, props, etc. to simulate the geological environment. The reactor body 21 has a first through hole 212 and a first opening 213. Both the first through hole 212 and the first opening 213 are connected to the accommodating cavity 211. The medium can enter and exit the accommodating cavity 211 through the first through hole 212. There are at least two first through holes 212 and at least two first openings 213. Each first opening 213 is connected to a visual component 22. The visual component 22 is detachably connected to the reactor body 21 and can block the first opening 213. By opening at least two first openings 213 on the reactor body 21, researchers can observe the simulated displacement within the containment cavity 211 from multiple angles, obtaining more complete and comprehensive information. Combined with at least two first through holes 212, the displacement process of different well pattern combinations can be simulated. The heating mechanism can heat the containment cavity 211, simulating the high-temperature state of the real formation. This allows the three-dimensional visual heating and constant temperature simulation device to simulate the displacement process under different geological features, different injection media, different displacement environments, different well pattern combinations, different temperatures, and different production systems in three dimensions. At the same time, it achieves full-process, multi-angle visualization, enabling more intuitive and quantitative studies on the impact of the above factors on the oil and gas resource extraction process, providing reliable technical support for the efficient development of oil and gas resources.

[0055] The shape of the vessel body 21 is not limited here. In this embodiment, the vessel body 21 is a cuboid. Each side of the vessel body 21 has a first opening 213. The support platform 1 has a second opening 12. One of the first openings 213 is located at the second opening 12. The viewing component 22 can pass through the second opening 12, so that the operator can observe the inside of the accommodating cavity 211 from multiple angles. In other embodiments, the vessel body 21 can also be a polygonal prism or other shapes. The number of first openings 213 should also be set according to the observation needs and the shape of the vessel body 21 to ensure a comprehensive observation angle.

[0056] There is no limitation on the number of first through holes 212. In this embodiment, eight first through holes 212 are provided. At least some of the first through holes 212 are used to simulate well networks. When the remaining first through holes 212 are not needed, the hexagonal screw plugs 216 can be used to seal the first through holes 212 to ensure the sealing of the accommodating cavity 211.

[0057] The heating mechanism includes a heating component 31 and a heat insulation and protection component 32. The heating component 31 is connected to the reactor body 21, and the heat insulation and protection component 32 is fitted on the outside of the reactor. The heat insulation and protection component 32 is provided with six third openings, each corresponding to a first opening 213. The visible component 22 can be inserted through the third opening. The heating component 31 heats the accommodating cavity 211, and the heat insulation and protection component 32 can keep the accommodating cavity 211 at a constant temperature. This allows the three-dimensional visible heating and constant temperature simulation device to simulate the high temperature environment of the real strata, further improving the accuracy of the simulation experiment.

[0058] Specifically, the heating assembly 31 includes several heating blocks 311, heating elements 312, and connecting members 313. The heating blocks 311 are disposed around the first opening 213, and adjacent heating blocks 311 are connected by the connecting members 313 to ensure structural stability. Each heating block 311 has an internal receiving hole into which the heating elements 312 can be inserted, allowing the heating blocks 311 to effectively and evenly dissipate the heat from the heating elements 312. This arrangement of the heating blocks 311 enables relatively uniform heating of the receiving cavity 211. Furthermore, due to the complex structure of the reactor, the configuration of the heating blocks 311 and heating elements 312 allows for uniform heating of the device within a relatively small volume.

[0059] The specific type of heating element 312 is not limited here. In this embodiment, the heating element 312 is an electric heating rod. The electric heating rod is connected to an intelligent temperature control module, which can adjust the temperature of the electric heating rod as needed. In other embodiments, water bath heating or the like can also be used.

[0060] The number of heating blocks 311 and heating elements 312 is not limited here. In this embodiment, eight heating blocks 311 are provided. Each heating block 311 has two receiving holes and each receiving hole is provided with a heating element 312. The first openings 213 on the upper and lower sides of the vessel body 21 are each connected to four heating blocks 311. The four heating blocks 311 are located on the periphery of the first openings 213. In other embodiments, the corresponding number of heating blocks 311 can be set according to the required temperature.

[0061] Specifically, the thermal insulation and protection component 32 includes a protective shell 321, an insulation layer, and a locking element 323. The locking element 323 is disposed between the reactor and the protective shell 321. The insulation layer can insulate the interior of the protective shell 321, preventing heat loss, saving energy, and improving heating efficiency. The protective shell 321 has a split structure, formed by at least two protective units 3211. A third opening can be formed between the protective units 3211. By making the protective shell 321 a split structure, it can be easily installed into the complex reactor. The locking element 323 can selectively lock adjacent protective units 3211, ensuring a tight connection between the protective units 3211 and preventing the protective units 3211 from falling off during the experiment.

[0062] There is no limit to the number of protective units 3211. In this embodiment, four protective units 3211 are set, which can better avoid the recording mechanism 4 and facilitate the installation by the experimenters. In other embodiments, the specific settings can be made according to the size and shape of the reaction vessel.

[0063] The specific type of locking element 323 is not limited here. In this embodiment, the locking element 323 is a spring latch, which can quickly connect and disconnect the protective unit 3211. In other embodiments, bolts and nuts can also be used for connection.

[0064] The specific material of the insulation layer is not limited here. In this embodiment, the insulation layer is made of asbestos, which can play a role in fireproofing and heat preservation. In other embodiments, the insulation layer may also be made of tin foil.

[0065] refer to Figures 6-7 The visual assembly 22 includes a viewing glass 221, a glass cover frame 222, and a viewing protective plate 223. The viewing glass 221 is located at the first opening 213. The glass cover frame 222 is connected to the vessel body 21, and the viewing glass 221 is sandwiched between the glass cover frame 222 and the vessel body 21. The viewing protective plate 223 is located on the side of the glass cover frame 222 away from the viewing glass 221, ensuring the sealing of the accommodating cavity 211 while allowing it to be clearly observed. Since the accommodating cavity 211 is under high pressure during the simulation experiment, the viewing glass 221 may break under high pressure. Therefore, the viewing protective plate 223 is set on the outermost side of the visual assembly 22 to prevent glass fragments from injuring the experimenters under such circumstances, providing temporary protection and ensuring the safety of the experiment.

[0066] Specifically, the glass cover frame 222 is provided with a viewing hole 2221 and a plurality of first connection holes 2222. The plurality of first connection holes 2222 are evenly spaced around the viewing hole 2221. The reactor body 21 is provided with a plurality of second connection holes 214. The plurality of second connection holes 214 are evenly spaced around the first opening 213. The first connection holes 2222 and the second connection holes 214 correspond one-to-one. The first connection holes 2222 and the second connection holes 214 are connected by bolts, so that the visual component 22 can effectively seal the first opening 213, ensuring the sealing of the accommodating cavity 211. At the same time, it allows the experimenters to quickly disassemble the visual component 22 to perform operations such as filling materials inside the reactor.

[0067] Furthermore, the visual component 22 also includes a seal (not shown in the figure). Each first opening 213 has a sealing groove 215 on its periphery. The seal is disposed in the sealing groove 215 to ensure the sealing of the accommodating cavity 211 and prevent the filling material or medium from leaking from the gap between the vessel body 21 and the visual glass 221.

[0068] There are no restrictions on the type of seal. In this embodiment, the seal is a sealing rubber ring, which is inexpensive and provides good sealing performance while facilitating the disassembly of the glass cover frame 222. In other embodiments, it can also be a PTFE gasket, etc.

[0069] Furthermore, a buffer (not shown in the figure) is provided between the viewing glass 221 and the glass cover frame 222 to prevent the viewing glass 221 from being damaged by the pressure of the glass cover frame 222.

[0070] There are no restrictions on the type of cushioning component. In this embodiment, a rubber gasket is used, but in other embodiments, foam board, polyethylene plastic, etc., can also be used.

[0071] The three-dimensional visual heating and constant temperature simulation device provided in this embodiment also includes an illumination element 5, which is connected to the glass cover frame 222. The illumination element 5 is configured to illuminate the visible glass 221, providing a light source for the experimental process, so that the simulation process can be observed more clearly.

[0072] refer to Figure 4 and Figure 8 The three-dimensional visual heating and constant temperature simulation device provided in this embodiment also includes a recording mechanism 4. The recording mechanism 4 includes a support frame 41 and a recording component 42. The recording component 42 is slidably connected to the support frame 41, and the support frame 41 is connected to the glass cover frame 222. The simulated conditions inside the accommodating cavity 211 can be recorded through each first opening 213, facilitating subsequent review by the experimenter. The recording component 42 changes the distance between itself and the vessel body 21 by sliding with the support frame 41, enabling it to record inside the accommodating cavity 211 from the optimal position.

[0073] Specifically, the support frame 41 includes two support rods 411, and the recording assembly 42 includes a camera 421 and a slider 422. The camera 421 is detachably connected to the slider 422, which has two second through holes. The support rods 411 are inserted into and slidably connected to the second through holes. The camera 421 is configured to record the state within the receiving cavity 211. The support rods 411 and the slider 422 ensure that the camera 421 is always aligned with the first opening 213, and allow the operator to easily adjust the distance between the camera 421 and the vessel body 21. This allows the camera 421 to record the simulated process within the receiving cavity 211 from the optimal position, achieving the best recording effect.

[0074] Furthermore, the support frame 41 also includes a connecting rod 412. The ends of the two support rods 411 away from the main body 21 are connected by the connecting rod 412, which increases the stability of the support rods 411 and prevents the camera 421 from falling off the support rods 411, thus ensuring the stability and safety of the experimental equipment.

[0075] The general usage process of the three-dimensional visual heating and constant temperature simulation device provided in this embodiment is as follows:

[0076] 1. Open the locking part 323 and remove part of the protective unit 3211;

[0077] 2. Remove the top-mounted visual component 22 from the vessel body 21;

[0078] 3. Install the fabricated simulated wells and valves at at least some of the first through holes 212 as needed, and seal the other first through holes 212 with hexagonal plugs 216;

[0079] 4. Fill the cavity 211 with molding sand and tools according to the experimental requirements;

[0080] 5. Reinstall the removed visual component 22;

[0081] 6. Turn on the lighting component 5 to provide a light source;

[0082] 7. Turn on the heating element 312;

[0083] 8. Reinstall the removed protective unit 3211;

[0084] 9. Adjust the position of camera 421 so that it can clearly record the simulated displacement process;

[0085] 10. Inject relevant media to conduct simulated displacement experiments.

[0086] Embodiments of the present invention provide a method for simulating isothermal displacement of oil and gas resources, employing a three-dimensional visual heating isothermal simulation device as described above, comprising:

[0087] S1: Fill molding sand and tools into the receiving cavity 211 through the first opening 213;

[0088] S2: Evacuate the cavity 211 using a vacuum pump;

[0089] S3: Use a displacement pump to inject crude oil into the accommodating cavity 211 through the first opening 213 until the pressure value specified in the experiment is reached;

[0090] S4: The heating mechanism heats the accommodating cavity 211 until the temperature inside the accommodating cavity 211 reaches the set temperature;

[0091] S5: Intermittently acquire images of the accommodating cavity 211;

[0092] S6: According to the injection location, injection speed and injection medium determined by the experimental plan, the injection medium is injected into the accommodating cavity 211 through a first through hole 212. The crude oil is displaced by the injection medium and discharged through another first through hole 212 and the parameters are recorded.

[0093] S7: After oil production stops, clean the three-dimensional injection and production development physical simulation device, adjust the injection and production position, injection and production speed and injection medium, and repeat S1-S5 to conduct the next round of experiments.

[0094] The cavity 211 is filled with molding sand and tools to simulate the three-dimensional formation. Then, the cavity 211 is evacuated to make the environment more closely resemble the actual formation. Crude oil is then injected into the cavity 211 to simulate the formation's oil and gas reservoir. The conditions within the cavity 211 are then recorded at intervals to ensure continuous data recording. The actual displacement process is then simulated by injecting the injection medium. As the injection medium enters, the crude oil is displaced from the cavity 211, completing one displacement simulation experiment. Finally, the cavity 211 is cleaned, and the injection / production position, injection / production rate, and injection medium are adjusted for the next experiment. The three-dimensional visual injection and production development simulation device enables the simulation experiment to be closer to the real situation of the formation and to simulate results that are closer to the actual situation. At the same time, the experimenters can observe and record the situation inside the accommodating cavity 211 from multiple angles through the first opening 213, which helps the experimenters to fully understand the situation of the simulation experiment. They can more intuitively and quantitatively study the impact of the above-mentioned factors on the oil and gas resource extraction process, and provide reliable technical support for the efficient development of oil and gas resources.

[0095] Specifically, S1 includes filling the receiving cavity 211 with molding sand and props through the first opening 213 to simulate a real geological environment.

[0096] Furthermore, after the initial fabrication of the three-dimensional visual injection-production-development simulation device, in order to ensure that the simulation experiment more closely resembles the actual formation conditions and that the experimental results are more accurate, it is necessary to verify the airtightness of the three-dimensional visual injection-production-development simulation device. Therefore, after S1, the process includes: injecting gas into the accommodating cavity 211 through the first opening 213 to verify the airtightness of the three-dimensional visual injection-production-development simulation device. Gas is injected into the accommodating cavity 211 through the first opening 213 to reach a certain pressure value in the accommodating cavity. The inflation valve is then closed, so that the accommodating cavity is only connected to the pressure gauge and left to stand for a certain period of time. For example, the reference pressure value is 0.5 MPa; the reference standing time is 12 hours. If the pressure value remains unchanged after the settling time, it indicates that the 3D visual injection-production-development simulation device has good airtightness and will not leak air or oil, allowing for further testing. If the pressure value decreases, it indicates that the airtightness of the 3D visual injection-production-development simulation device is poor, requiring inspection to identify and resolve any leaks. Finally, the 3D visual injection-production-development simulation device should be reassembled for further airtightness verification until its airtightness is ensured.

[0097] No specific type of gas is limited here. In this embodiment, nitrogen is used because it is low in cost, easy to obtain, non-toxic and harmless, and ensures the safety of the experimenters. Argon can also be used in other embodiments.

[0098] Specifically, S2 includes:

[0099] S2.1: Connect part of the first through-hole 212 and the vacuum pump via a six-way valve. The six-way valve has six independently controllable valve holes, allowing the accommodating cavity to connect multiple devices, avoiding repeated disassembly and reconnection, and reducing experimental difficulty. Connecting part of the first through-hole 212 and the valve holes of the six-way valve facilitates easier experimental operations for personnel. Then, connect the vacuum pump to the six-way valve to evacuate the accommodating cavity 211 to simulate the geological environment.

[0100] S3 includes:

[0101] S3.1: Set a safe pressure value for the displacement pump, and inject crude oil into the accommodating cavity 211 at a constant speed using the displacement pump until the pressure in the accommodating cavity reaches the safe pressure value.

[0102] S3.2: Crude oil is injected into the accommodating cavity 211 in a constant pressure mode using a displacement pump until the pressure value inside the accommodating cavity 211 reaches the pressure value required for the experiment.

[0103] Specifically, the displacement pump injects crude oil into the receiving cavity 211 through the first through-hole 212. The displacement pump injects at a constant speed, allowing the crude oil in the receiving cavity 211 to quickly become saturated. When the pressure in the receiving cavity 211 reaches the set safe pressure value, the displacement pump stops pumping, at which point the crude oil in the receiving cavity 211 is essentially saturated. For example, the safe pressure value is 0.1 MPa, and the pumping speed of the displacement pump is 1-10 L / min.

[0104] Once the crude oil reaches basic saturation, the displacement pump is switched to constant pressure mode to continue injecting crude oil into the accommodating chamber 211. This not only better saturates the crude oil but also increases the pressure in the accommodating chamber 211 to the pressure value required for the experiment, making the experiment closer to the actual state of the formation. The pressure value required for the experiment should be determined according to the experimental requirements.

[0105] In step S4, the accommodating cavity is heated by a heating mechanism until the internal temperature reaches the set temperature, thus simulating the high-temperature environment in a real geological formation, resulting in more accurate experimental results. For example, the set temperature is 25℃-150℃.

[0106] Furthermore, the heating mechanism heats the accommodating cavity for at least four hours to ensure that any position within the accommodating cavity reaches the set temperature requirement. Once the temperature within the accommodating cavity stabilizes, the specific displacement simulation process can be carried out.

[0107] In step S5, images are acquired at intervals in the accommodating cavity 211 to obtain a relatively complete record of the entire experimental process, which can be repeatedly observed and analyzed by the experimenters later. For example, the interval time is 30-60 seconds.

[0108] Specifically, by setting the time interval for the camera 421 to take pictures, and by having the camera 421 periodically acquire images of the accommodating cavity 211, the experimenters can obtain a more complete experimental record and clearly observe the changes in the crude oil in the accommodating cavity 211 throughout the entire experimental process.

[0109] Specifically, in S6, the injection and production location, injection and production rate and injection medium determined by the experimental plan are injected into the accommodating cavity through a first through hole 212. The crude oil is displaced by the injected medium and discharged through another first through hole 212, completing the main process of the experiment. During the simulated displacement process, parameters such as injection and production pressure difference and injection gas / liquid volume should be recorded for the experimental personnel to analyze the situation of the simulation experiment.

[0110] Specifically, in S7, after oil production ceases, the three-dimensional visual injection-production development simulation device is cleaned, and the injection-production position, injection-production rate, and injection medium are adjusted. S1-S5 are then repeated for the next round of experiments. For example, the relevant parameters for ceasing oil production are: a gas-oil ratio of over 1300 in gas-driven experiments and a water cut greater than 98% in water-driven experiments.

[0111] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A three-dimensional visual heating and constant temperature simulation device for simulating the displacement process of oil and gas resources, characterized in that, include: Support platform (1); The reactor includes a reactor body (21) and a viewing component (22). The reactor body (21) is connected to the support platform (1). The reactor body (21) has a accommodating cavity (211) inside. The reactor body (21) has a first through hole (212) and a first opening (213). The first through hole (212) and the first opening (213) are both connected to the accommodating cavity (211). The medium can enter and exit the accommodating cavity (211) through the first through hole (212). There are at least two first through holes (212) and at least two first openings (213). Each first opening (213) is connected to a viewing component (22). The viewing component (22) is detachably connected to the reactor body (21). The viewing component (22) can block the first opening (213). A heating mechanism is connected to the vessel body (21), and the heating mechanism is capable of heating the cavity (211); The heating mechanism includes a heating component (31) and a heat insulation and protection component (32). The heating component (31) is connected to the reactor body (21). The heat insulation and protection component (32) is sleeved on the outside of the reactor. The heat insulation and protection component (32) is provided with six third openings. The third openings correspond one-to-one with the first openings (213). The visible component (22) can be inserted through the third openings. The heating assembly (31) includes a plurality of heating blocks (311), heating elements (312), and connecting elements (313). The heating blocks (311) are disposed around the first opening (213), and adjacent heating blocks (311) are connected by the connecting elements (313). The heating blocks (311) have accommodating holes inside, and the heating elements (312) are inserted into the accommodating holes. The thermal insulation and protection component (32) includes a protective shell (321), a thermal insulation layer, and a locking member (323). The thermal insulation layer is disposed between the reactor and the protective shell (321). The protective shell (321) is a split structure, and the protective shell (321) is formed by at least two protective units (3211). The protective units (3211) can form the third opening by surrounding each other. The locking member (323) can selectively lock adjacent protective units (3211).

2. The three-dimensional visual heating and constant temperature simulation device according to claim 1, characterized in that, The main body (21) of the vessel is rectangular, and each side of the main body (21) is provided with a first opening (213). The support platform (1) is provided with a second opening (12), wherein one of the first openings (213) is located at the second opening (12), and the visible component (22) can be inserted through the second opening (12).

3. The three-dimensional visual heating and constant temperature simulation device according to claim 1, characterized in that, The visual component (22) includes a viewing glass (221), a glass cover frame (222), and a viewing guard plate (223). The viewing glass (221) is disposed at the first opening (213). The glass cover frame (222) is connected to the vessel body (21). The viewing glass (221) is sandwiched between the glass cover frame (222) and the vessel body (21). The viewing guard plate (223) is disposed on the side of the glass cover frame (222) away from the viewing glass (221).

4. The three-dimensional visual heating and constant temperature simulation device according to claim 3, characterized in that, The glass cover frame (222) is provided with a viewing hole (2221) and a plurality of first connecting holes (2222). The plurality of first connecting holes (2222) are evenly spaced around the viewing hole (2221). The vessel body (21) is provided with a plurality of second connecting holes (214). The plurality of second connecting holes (214) are evenly spaced around the first opening (213). The first connecting holes (2222) and the second connecting holes (214) correspond one-to-one. The first connecting holes (2222) and the second connecting holes (214) are connected by bolts.

5. The three-dimensional visual heating and constant temperature simulation device according to claim 3, characterized in that, It also includes a recording mechanism (4), which includes a support frame (41) and a recording component (42). The recording component (42) is slidably connected to the support frame (41), and the support frame (41) is connected to the glass cover frame (222).

6. The three-dimensional visual heating and constant temperature simulation device according to claim 5, characterized in that, The support frame (41) includes two support rods (411), the recording assembly (42) includes a camera (421) and a slider (422), the camera (421) is detachably connected to the slider (422), the slider (422) is provided with two second through holes, the support rod (411) is inserted into the second through hole and slidably connected to the second through hole, and the camera (421) is configured to record the state in the accommodating cavity (211).

7. A method for simulating isothermal displacement of oil and gas resources, characterized in that, The three-dimensional visual heating and constant temperature simulation device according to any one of claims 1-6 comprises: S1: Fill the cavity (211) with molding sand and tools through the first opening (213); S2: Evacuate the cavity (211) using a vacuum pump; S3: Use a displacement pump to inject crude oil into the accommodating cavity (211) through the first opening (213) until the pressure value specified in the experiment is reached; S4: The accommodating cavity (211) is heated by the heating mechanism until the temperature inside the accommodating cavity (211) reaches the set temperature; S5: Intermittently acquire images of the accommodating cavity (211); S6: According to the injection location, injection speed and injection medium determined by the experimental plan, the injection medium is injected into the accommodating cavity (211) through a first through hole (212). The crude oil is displaced by the injection medium and discharged through another first through hole (212) and the parameters are recorded. S7: After oil production stops, clean the three-dimensional injection and production development physical simulation device, adjust the injection and production position, injection and production speed and injection medium, and repeat S1-S6 to conduct the next round of experiments.

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