A physical simulation device and method for the development of high-temperature and ultra-high-pressure fractured-vuggy oil and gas reservoirs

Abstract

This invention provides a physical simulation device and method for developing high-temperature and ultra-high-pressure fractured-vuggy oil and gas reservoirs. By setting an asymmetrical combination of a central hole and an eccentric hole on the end face of the first probe, combined with a closed rubber sleeve structure, it achieves a realistic simulation of the eccentric contact state between the wellbore and the fractured-vuggy body, avoiding the problem of artificially high recovery rates caused by traditional end-face opening methods. Simultaneously, the use of a rubber sleeve made of high-temperature and high-pressure resistant composite material and a multi-seal structure, along with independent control of axial pressure and confining pressure, ensures stable operation of the device under ultra-high temperature and ultra-high pressure conditions. Furthermore, by combining laser etching fractured-vuggy core fabrication technology with a multi-pore combination development scheme, it can flexibly simulate various development modes such as depletion development, huff-and-puff production, and displacement development, providing a reliable experimental platform for studying the development laws of fractured-vuggy oil and gas reservoirs. This significantly improves the matching degree between physical simulation results and actual field conditions, and has strong engineering application value.

Description

Technical Field

[0001] This invention relates to the field of oil and gas field development technology, and in particular to a physical simulation device and method for developing high-temperature, ultra-high-pressure fractured-vuggy oil and gas reservoirs. Background Technology

[0002] High-temperature, high-pressure fractured-vuggy carbonate oil and gas reservoirs are an important type of global energy supply, and their development efficiency directly affects the degree to which energy demand is met. With the continuous deepening of deep oil and gas exploration and development, fractured-vuggy reservoirs, due to their complex reservoir space, strong heterogeneity, and unique fluid flow patterns, have become a research hotspot in the field of oil and gas field development. Physical simulation experiments are an important means to reveal the development laws of this type of oil and gas reservoir. Currently, some core preparation technologies and supporting physical simulation evaluation devices have been proposed and applied in laboratory research.

[0003] However, existing technologies still have many shortcomings in practical applications. First, traditional core preparation methods often use end-face openings to simulate wellbores, essentially forcibly establishing ideal fluid channels on the core end face. This operation leads to a physical simulation recovery rate far exceeding the actual field value. In actual fractured-vuggy reservoirs, the fractured-vuggy system is formed by multiple factors such as tectonic movement and dissolution. Its size, shape, and spatial distribution are highly random, making it difficult for drilling to accurately hit the top or bottom of the fractured-vuggy body. The effective contact probability between the drilling and the fractured-vuggy body in the field is less than 30%, and the end-face opening method in traditional experiments cannot reproduce this eccentric contact state. Second, existing simulation devices are mostly only suitable for conventional medium-temperature and high-pressure conditions, lacking an overall design system for ultra-high temperature and ultra-high pressure deep fractured-vuggy oil and gas reservoirs. Although some patents mention that the device has high-temperature and high-pressure resistance in the specification, in reality, they only thicken the core holder cavity. The temperature and pressure resistance limits of key vulnerable components such as the sealing sleeve and combined sealing ring are low, making it impossible to reproduce the extreme temperature and pressure environment of deep reservoirs in the field. In addition, most existing core holder probes have a single central hole structure and no combination design with eccentric holes, which cannot simulate the eccentric contact state between the wellbore and the fractured cavity; the rubber sleeve is mostly an open sidewall structure, which cannot effectively isolate different fluid channels, and is prone to causing lateral flow on the core end face, affecting the accuracy of experimental results.

[0004] Therefore, there is an urgent need in this field to develop a physical simulation device and method for the development of high-temperature and ultra-high-pressure fractured-vuggy oil and gas reservoirs that can realistically reproduce field conditions, have the ability to withstand ultra-high temperature and ultra-high pressure, and can simulate the eccentric contact state between the wellbore and the fractured-vuggy body. This would solve the problem of the simulation results being out of sync with the actual field conditions in the existing technology, and provide reliable support for the study of oil and gas reservoir development laws and the formulation of plans. Summary of the Invention

[0005] The purpose of this invention is to provide a physical simulation device and method for the development of high-temperature and ultra-high-pressure fractured-vuggy oil and gas reservoirs, so as to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following solution: This invention provides a physical simulation device for the development of high-temperature and ultra-high-pressure fractured-vuggy oil and gas reservoirs, comprising: a high-temperature and ultra-high-pressure resistant core holder, a high-pressure displacement pump, and a high-pressure intermediate container; The core holder is equipped with a first probe and a second probe at both ends; The end face of the first probe is provided with two asymmetrically distributed fluid channel holes, including a central hole and an eccentric hole. The central hole is opened along the probe axis and extends through the axial length of the probe. The eccentric hole is opened in the area between the probe axis and the outer peripheral edge and extends through the axial length of the probe. The two holes extend from the inside of the probe to form independent external interfaces. The end face of the second probe is provided with a central hole, which is opened along the probe axis and extends through the axial length of the probe to extend to an external interface that connects to the inner pipeline of the telescopic rod. The end faces of the first probe and the second probe are respectively provided with a first rubber sleeve and a second rubber sleeve. The rubber sleeve is a ring structure and is made of high temperature and high pressure resistant composite material. The end face of the first rubber sleeve has two through holes, the diameter and position of which match the center hole and eccentric hole of the first probe, respectively. The end face of the second rubber sleeve has a through hole that matches the center hole of the second probe; The annular sidewall of the rubber sleeve is a closed structure, with an outer diameter consistent with the outer diameter of the probe end face and an inner diameter that matches the outer diameter of the core. The end of the second probe furthest from the core is fixedly connected to a telescopic rod assembly, which is used to apply axial pressure to make the end face of the rubber sleeve fit tightly against the two ends of the core, forming a sealed structure between the probe, the rubber sleeve, and the core.

[0007] Preferably, the eccentric hole is located at a distance of 1 / 2 to 2 / 3 of the probe radius from the probe axis.

[0008] Preferably, a multi-layer sealing structure is formed between the end faces of the first and second probes and the rubber sleeve, and between the rubber sleeve and the end face of the core, to isolate different fluid channels and prevent fluid from flowing laterally across the end face of the core.

[0009] Preferably, the core holder is provided with a confining pressure port and an axial pressure port inside, which are used to independently control the confining pressure and axial pressure to simulate the formation stress state.

[0010] The present invention also provides a physical simulation method for the development of high-temperature and ultra-high-pressure fractured-vuggy oil and gas reservoirs based on the above-mentioned device, comprising the following steps: S1. Core processing: The matrix core is split open from the middle. Based on the seismic interpretation results, the actual reservoir cavity is projected onto the plane. After being scaled down, the cavity structure is carved inside the core using laser etching. Cavities are then connected by cracks. S2. Simulated wellbore construction: Based on the seismic interpretation results, the well location is determined, and a horizontal hole is drilled on the rock core at the corresponding cave location, and the hole is drilled out from the end face of the rock core at a corner to form a side borehole simulating an injection-production well; S3. Core assembly and sealing: The two cores are assembled, and the remaining parts except for the cracks are sealed with high-temperature resistant adhesive; S4. Core loading and condition establishment: Load the core into the holder, determine the placement direction of the holder according to the reservoir fracture-vuggy connection pattern, inject formation water and oil and gas through the central hole, and establish the initial reservoir conditions by using density difference. S5. Development Simulation Experiment: Select depletion development, huff and puff production, or displacement development methods according to the experimental objectives, and simulate different development schemes by injecting and producing fluids through different combinations of pore locations.

[0011] Preferably, in step S4, the axial pressure is set to be 2-3 MPa higher than the internal pressure, and the confining pressure is set to be 3-4 MPa higher than the axial pressure, so as to ensure that the rubber sleeve fits tightly with the end face of the core.

[0012] Preferably, for fractured-vuggy reservoirs, in step S5, during depletion development, the central borehole pipeline is closed and the side borehole pipeline is opened for production; during huff and puff production, water is injected from the side borehole; during displacement development, water is injected from the bottom central borehole and produced from the top side borehole, or gas is injected from the top central borehole and produced from the side borehole.

[0013] Preferably, for fractured-vuggy gas reservoirs, step S4 establishes gas reservoir conditions by filling the bottom center hole with formation water, injecting natural gas from the top center hole, and producing water from the bottom. In step S5, during depletion development, the central borehole pipeline is closed and the side borehole is opened for extraction; during water injection and huffing, water is injected from the side borehole after the pressure drops to the anti-condensation pressure; during displacement development, water is injected from the bottom central borehole and extracted from the top side borehole, or water is injected from the top central borehole and extracted from the side borehole.

[0014] Preferably, in step S1, after the core hole is carved, the hole position at the end of the core is set to correspond to the through hole position of the clamping probe and the rubber sleeve to ensure accurate connection of the fluid channel.

[0015] Preferably, in step S1, the fracture-cavity structure carved inside the rock core using laser etching includes cracks and cavities, with cracks connecting different cavities to form a fracture-cavity network.

[0016] The present invention achieves the following beneficial technical effects compared to the prior art: This invention provides a physical simulation device and method for developing high-temperature and ultra-high-pressure fractured-vuggy oil and gas reservoirs, characterized by its reasonable structural design, high functional integration, and strong simulation realism. Specifically, by setting an asymmetrical combination of a central hole and an eccentric hole on the end face of the first probe, combined with a closed rubber sleeve structure, it achieves a realistic simulation of the eccentric contact state between the wellbore and the fractured-vuggy body, avoiding the problem of artificially inflated recovery rates caused by traditional end-face opening methods. Simultaneously, the use of a rubber sleeve made of high-temperature and high-pressure resistant composite materials and a multi-seal structure, along with independent control of axial pressure and confining pressure, ensures stable operation of the device under ultra-high temperature and ultra-high pressure conditions. Furthermore, by combining laser etching fractured-vuggy core fabrication technology with a multi-pore combination development scheme, it can flexibly simulate various development modes such as depletion development, huff-and-puff production, and displacement development, providing a reliable experimental platform for studying the development laws of fractured-vuggy oil and gas reservoirs, significantly improving the matching degree between physical simulation results and actual field conditions, and possessing strong engineering application value. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the core holder for the high-temperature and ultra-high-pressure fractured-vuggy oil and gas reservoir simulation and development device provided by the present invention; Figure 2 The operation flow chart of the high-temperature and ultra-high pressure fractured-vuggy oil and gas reservoir simulation and development device provided by the present invention; Figure 3 This is a schematic diagram of the sealing sleeve with eccentric hole of the present invention; Figure 4 This is a schematic diagram of the fractured core sample of the present invention. Detailed Implementation

[0019] The serial numbers assigned to components in this document, such as "first," "second," etc., are merely used to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages). In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0020] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] The purpose of this invention is to provide a physical simulation device and method for the development of high-temperature and ultra-high-pressure fractured-vuggy oil and gas reservoirs, aiming to solve the technical problems in the prior art, such as the inability of simulation devices to realistically reproduce the extreme temperature and pressure environment of deep fractured-vuggy oil and gas reservoirs, the inability to simulate the eccentric contact state between the wellbore and the fractured-vuggy body, and the tendency of the rubber sleeve sealing structure to cause lateral flow at the end face.

[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Example 1: like Figure 1 , Figure 2 As shown, the present invention provides a physical simulation device for the development of high-temperature and ultra-high-pressure fractured-vuggy oil and gas reservoirs, mainly comprising: a high-temperature and ultra-high-pressure resistant core holder, a high-pressure displacement pump, and a high-pressure intermediate container. The core holder is the core component of the entire simulation device, used to hold and fix specially processed core samples 3, and to provide them with a pressure environment simulating formation conditions. Figure 1 As shown, the core holder has a high-pressure chamber 1 for accommodating the core 3 and withstanding the internal high pressure. A core rubber sleeve 4 is fitted over the core 3 to protect it and create a sealed space between the core and the chamber. A high-pressure displacement pump (such as...) Figure 2 The figures 30, 34, 42, and 46 shown are used to provide ultra-high pressure displacement power for high-pressure intermediate vessels (such as...). Figure 2 Valves 36, 47, and 51 (shown) are used for storing and preheating the high-temperature, high-pressure fluids required for the experiment. The entire experimental system is also equipped with multiple valves (such as...). Figure 2The gauges 31, 35, 45, and 50 shown are used to control fluid flow, and pressure gauges (such as...) Figure 2 The valves shown (32, 39, 40, 43, 44) are used to monitor the pressure status of various parts of the system, as well as three-way valves (such as...). Figure 2 Devices 37, 41, and 48 (shown) are used to switch the flow path. Collection devices 38 and 49 are used to collect and measure the produced fluid. To simulate the high-temperature environment of the reservoir, the core holder can be placed in the high-temperature oven 33.

[0025] Specifically, combined Figure 1 The core holder has a first probe 28 and a second probe 6 at both ends. The end face of the first probe 28 has two asymmetrically distributed fluid channel holes. As one of the key innovations of this invention, these two holes include a central hole 25 and an eccentric hole 24. The central hole 25 is located along the probe axis and extends through the probe's axial length, simulating an ideal central injection / production well location. The eccentric hole 24 is located in the area between the probe axis and the outer peripheral edge. Specifically, the eccentric hole 24 is positioned at a distance of 1 / 2 to 2 / 3 of the probe radius from the probe axis. This position more realistically simulates the eccentric contact state commonly encountered when hitting fractured cavities in actual field drilling. The two holes extend from the inside of the probe, forming independent external interfaces, namely the eccentric hole line 24 and the central hole line 25, for sealed connection with external injection or production pipelines, enabling independent control of different fluid channels. The end face of the second probe 6 has only one central hole. This hole is opened along the probe axis and extends through the axial length of the probe, extending out to connect with the pipeline 9 inside the telescopic rod 8, forming the outlet pipeline 9 as an external interface.

[0026] To address the problem that traditional rubber sleeves cannot effectively isolate fluid channels and easily cause cross-flow at the end face, this invention provides annular rubber sleeves, namely, a first rubber sleeve 2 and a second rubber sleeve 5, on the end faces of the first probe 28 and the second probe 6, respectively. Figure 3 As shown, the first rubber sleeve 2 is an annular structure made of high-temperature and high-pressure resistant composite material to ensure its sealing performance and structural stability under ultra-high temperature and pressure environments. The end face of the first rubber sleeve 2 has two through holes: a central hole 52 and an eccentric hole 53. Their diameters and positions precisely match the central hole 25 and eccentric hole 24 of the first probe 28, ensuring that the fluid can only contact the core end face through the through holes of the rubber sleeve, avoiding disorderly diffusion of the fluid in the end face area. The end face of the second rubber sleeve 5 has one through hole, corresponding to and matching the central hole of the second probe 6. More importantly, the annular sidewalls of both the first rubber sleeve 2 and the second rubber sleeve 5 are closed structures, with their outer diameter matching the outer diameter of the probe end face and their inner diameter matching the outer diameter of the core 3. This closed sidewall structure physically isolates the end face area between the two holes of the first probe 28, fundamentally blocking the possibility of lateral flow of fluid in the core end face and ensuring the accuracy of the simulation experiment.

[0027] Regarding pressure application and sealing, a telescopic rod assembly 8 is fixedly connected to the end of the second probe 6 furthest from the core. This telescopic rod assembly 8 includes the telescopic rod body, a pressure cylinder piston 13, and a sealing structure that cooperates with the pressure cylinder piston 13. Specifically, the telescopic rod 8 achieves sealing with the clamp body through sealing plugs 12 and 29, and employs multiple sealing protections using O-rings 7 and 10 and combined sealing rings 11, 15, and 21 to ensure no leakage under high pressure conditions. The telescopic rod assembly 8 applies axial pressure through axial pressure ports 14 and 17, pushing the second probe 6 towards the core 3, so that the end faces of the first rubber sleeve 2 and the second rubber sleeve 5 are tightly fitted with the two end faces of the core 3, forming a reliable multi-layered sealing structure between the probe, rubber sleeve, and core. At both ends of the clamp, a left end face cap 20 and a right end face cap 19 are respectively provided to seal both ends of the high-pressure chamber 1, and are secured and locked by sealing nuts 16 and 26 and retaining rings 18 and 22.

[0028] To fully simulate the stress state of underground strata, the core holder is also equipped with confining pressure ports 23 and 27 for independently controlling the confining pressure and axial pressure. In the preferred operating mode of this invention, the axial pressure is typically set to be about 2 MPa higher than the internal fluid pressure (internal pressure) of the core to ensure tight contact between the rubber sleeve and the core end face, while the confining pressure is 3-4 MPa higher than the axial pressure to simulate the pressure of the overlying strata and prevent lateral leakage of the core.

[0029] This invention also provides a physical simulation method for developing high-temperature, ultra-high-pressure fractured-vuggy oil and gas reservoirs based on the aforementioned device. The method first involves core processing, a prerequisite for successfully reproducing the complex underground fractured-vuggy structure in the simulation experiment. Specifically, a matrix core with properties similar to the target reservoir is selected and precisely split in the middle. Based on the seismic interpretation results of the target block, the various morphologies and random distribution of cavities in the actual reservoir are projected onto a plane. Then, based on the actual length and diameter of the core profile, the size and spacing of the actual cavities are proportionally reduced, and the diameter of the experimental cavity 56 is designed to be smaller than the diameter of the core. After the three-dimensional design of the fractures and cavities is completed, the designed fractured-vuggy structure is precisely engraved on the two halves of the split core using laser etching. The cavities are connected by etched cracks 57, forming a structure resembling... Figure 4The complex fracture-cavity network 56 and 57 is shown. After the fracture-cavity etching is completed, the wellbore drilling location is determined again based on the seismic interpretation results. A cavity matching the well location is found on the core, and a small horizontal hole is first drilled from this location, then the hole exits from the core end face at a bend, forming a side-drilled hole 55 simulating the injection-production well. The positions of the openings 54 and 55 on the core end face must precisely correspond to the positions of the center hole 25, the eccentric hole 24 on the holder probe, and the through holes 52 and 53 on the rubber sleeve to ensure accurate connection of subsequent fluid channels. Finally, the two halves of the core are joined together. Except for the etched crack 57, the remaining joining surfaces are tightly sealed with high-temperature resistant adhesive to prevent non-simulated fluid flow along the joining surfaces.

[0030] After core preparation, the core is loaded into a core holder for simulation experiments. The placement orientation of the holder is determined based on the actual development and connection patterns of fractures and cavities in the reservoir. For example, for reservoirs with longitudinally connected fractures and cavities, the holder is placed vertically during the experiment, with the first probe 28 (with two holes) positioned at the top; for reservoirs with transversely connected fractures and cavities, the holder is placed horizontally. When loading the core, it is necessary to ensure that the side borehole 55 is located at the designed production location (e.g., the upper part).

[0031] For the simulation of fractured-vuggy reservoirs, valve 48 at the location of the cavity connected to the side borehole 55 is first closed. High-pressure displacement pump 34 is used to inject formation water into core 3 through the bottom center borehole (i.e., the center borehole of the second probe 6, via pipeline 9) to establish initial water saturation. Then, crude oil is slowly injected through the same bottom center borehole 9, and water is extracted from the top center borehole outlet 25 using the oil-water density difference, thus establishing the original reservoir conditions with oil saturation in the core. During this process, axial pressure and confining pressure are applied through axial pressure ports 14 and 17 and confining pressure ports 23 and 27 respectively to ensure sealing. In the development simulation experiment, if depletion development is to be carried out, valves 37 and 50 of the two previously used center borehole pipelines 9 and 25 are closed, and valve 48 of pipeline 24 connected to the side borehole 55 is opened for depletion production. If huff and puff production is to be carried out, water is injected through the pipeline connected to the side borehole 24 after depletion production. If displacement development is carried out, injection and production well locations can be flexibly combined. For example, when water injection is carried out, the valve 50 of the pipeline in the top center hole 25 is closed, water is injected from the bottom center hole 9, and production is carried out from the top side hole 24; when gas injection is carried out, the valve 37 of the bottom center hole 9 is closed, gas is injected from the top center hole 25, and production is carried out from the side hole 24, thereby evaluating the effects of different development methods.

[0032] For the simulation of fractured-vuggy gas reservoirs, the experimental procedure is similar but the medium is different. First, the valve 48 at the location of the hole connected to the side borehole 24 is closed. The clamp is erected, valve 37 is opened, and formation water is injected into the core through the bottom center hole 9 using the high-pressure displacement pump 34. Then, natural gas (including condensate gas) is slowly injected through the top center hole 25 using another displacement pump 30. Water is extracted from the bottom outlet 9 using the gas-water density difference to establish the original conditions of the gas reservoir. During development simulation, the valves 37 and 50 of the center hole pipelines 9 and 25 are closed, and the valve 48 of the side pipeline 24 is opened for extraction. For condensate gas reservoirs, when the depletion development pressure drops below the anti-condensate pressure, the pipeline can be connected through the side outlet 24, and water can be injected through the displacement pump 46 to improve the condensate oil recovery rate. During displacement development, different combinations can be selected, such as injecting water from the bottom center hole 9 and extracting water from the top side hole 24, or injecting water from the top center hole 25 and extracting water from the top side hole 24, to evaluate the effect of water injection development.

[0033] Through the above-mentioned apparatus and method, the present invention can highly simulate the flow behavior of fluids in complex fractured-vuggy oil and gas reservoirs under high temperature, high pressure and even ultra-high pressure conditions, as well as the mining dynamics under different development methods, providing a reliable experimental basis for the formulation of oil and gas field development plans.

[0034] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] It should be noted that the components mentioned in the above embodiments are all general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0036] This invention has illustrated its principles and implementation methods using specific examples. The descriptions of these embodiments are merely illustrative of the method and its core ideas; furthermore, those skilled in the art will recognize that modifications may be made to the specific implementation methods and application scope based on the principles of this invention. Therefore, the content of this specification should not be construed as limiting the invention.

Claims

1. A physical simulation device for developing high-temperature and high-pressure fractured-vug type oil and gas reservoirs, characterized in that, The utility model relates to a high-temperature and high-pressure core holder, a high-pressure displacement pump and a high-pressure intermediate container. The core holder is provided with a first probe and a second probe at two ends thereof. The end surface of the first probe is provided with two asymmetrically distributed fluid passage holes, including a center hole and an eccentric hole. The end surface of the second probe is provided with a center hole. The end surface of the first probe is provided with a first rubber sleeve, and the end surface of the second probe is provided with a second rubber sleeve. The end surface of the first rubber sleeve is provided with two through holes. The end surface of the second rubber sleeve is provided with a through hole. The rubber sleeve has a closed annular side wall, and the outer diameter of the rubber sleeve is consistent with the outer diameter of the end surface of the probe, and the inner diameter of the rubber sleeve is adapted to the outer diameter of the core. The eccentric hole is arranged at a position 1 / 2 to 2 / 3 of the radius of the probe. The end surfaces of the first probe and the second probe and the rubber sleeve and the end surfaces of the core form a multiple sealing structure for isolating different fluid passages and preventing fluid from transversely channeling at the end surfaces of the core.

2. The physical simulation device for developing high-temperature and high-pressure fractured-vuggy reservoirs according to claim 1, characterized in that, The core holder is provided with a confining pressure pressurizing port and an axial pressure pressurizing port for independently controlling the confining pressure and the axial pressure to simulate the stress state of the formation.

3. The physical simulation device for developing high-temperature and high-pressure fractured-vuggy reservoirs according to claim 1, characterized in that, The utility model relates to a high-temperature and high-pressure core holder, a high-pressure displacement pump and a high-pressure intermediate container.

4. The physical simulation device for developing high-temperature and high-pressure fractured-vuggy reservoir according to claim 1, wherein, The core holder is provided with a first probe and a second probe at two ends thereof.

5. A physical simulation method for developing high-temperature and high-pressure fractured-vug type oil and gas reservoirs based on the apparatus according to any one of claims 1 to 4, characterized in that, The end surface of the first probe is provided with two asymmetrically distributed fluid passage holes, including a center hole and an eccentric hole. The end surface of the second probe is provided with a center hole. The end surface of the first probe is provided with a first rubber sleeve, and the end surface of the second probe is provided with a second rubber sleeve. The end surface of the first rubber sleeve is provided with two through holes. The end surface of the second rubber sleeve is provided with a through hole. The rubber sleeve has a closed annular side wall, and the outer diameter of the rubber sleeve is consistent with the outer diameter of the end surface of the probe, and the inner diameter of the rubber sleeve is adapted to the outer diameter of the core.

6. The physical simulation method for developing high-temperature and high-pressure fractured-vuggy reservoir according to claim 5, characterized in that, The eccentric hole is arranged at a position 1 / 2 to 2 / 3 of the radius of the probe. The end surfaces of the first probe and the second probe and the rubber sleeve and the end surfaces of the core form a multiple sealing structure for isolating different fluid passages and preventing fluid from transversely channeling at the end surfaces of the core. The core holder is provided with a confining pressure pressurizing port and an axial pressure pressurizing port for independently controlling the confining pressure and the axial pressure to simulate the stress state of the formation. The utility model relates to a high-temperature and high-pressure core holder, a high-pressure displacement pump and a high-pressure intermediate container. The core holder is provided with a first probe and a second probe at two ends thereof. The end surface of the first probe is provided with two asymmetrically distributed fluid passage holes, including a center hole and an eccentric hole. The end surface of the second probe is provided with a center hole. The end surface of the first probe is provided with a first rubber sleeve, and the end surface of the second probe is provided with a second rubber sleeve. The end surface of the first rubber sleeve is provided with two through holes. The end surface of the second rubber sleeve is provided with a through hole. The eccentric hole is arranged at a position 1 / 2 to 2 / 3 of 7. The physical simulation method for developing high-temperature and high-pressure fractured-vuggy reservoir according to claim 5, characterized in that, For fractured-vuggy reservoirs, in step S5, during depletion development, the central borehole pipeline is closed and the side borehole pipeline is opened for production; during huff and puff production, water is injected from the side borehole; during displacement development, water is injected from the bottom central borehole and produced from the top side borehole, or gas is injected from the top central borehole and produced from the side borehole.

8. The physical simulation method for developing high-temperature and high-pressure fractured-vuggy reservoir according to claim 5, characterized in that, For fractured-vuggy gas reservoirs, step S4 establishes gas reservoir conditions by filling the bottom center hole with formation water, injecting natural gas from the top center hole, and producing water from the bottom. In step S5, during depletion development, the central borehole pipeline is closed and the side borehole is opened for extraction; during water injection and huffing, water is injected from the side borehole after the pressure drops to the anti-condensation pressure; during displacement development, water is injected from the bottom central borehole and extracted from the top side borehole, or water is injected from the top central borehole and extracted from the side borehole.

9. The physical simulation method for developing high-temperature and high-pressure fractured-vuggy reservoir according to claim 5, characterized in that, In step S1, after the slit carving is completed, the hole position at the end of the rock core is set to correspond to the through hole position of the clamping probe and the rubber sleeve to ensure accurate connection of the fluid channel.

10. The physical simulation method for developing high-temperature and high-pressure fractured-vuggy reservoir according to claim 5, characterized in that, In step S1, the fracture-cavity structure carved inside the rock core using laser etching includes cracks and cavities. The cracks are used to connect different cavities to form a fracture-cavity network.

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