Rock oil immersion experiment device

Abstract

The utility model discloses a rock oil leaching experiment device which comprises an experiment container and an isolation structure, and a cavity is formed in the experiment container; the isolation structure is arranged in the cavity, the cavity is divided into a plurality of containing spaces by the isolation structure, the containing spaces are isolated from one another, and the containing spaces are used for containing experimental samples. A plurality of relatively independent accommodating spaces exist in the cavity of the experiment container, and a group of rock samples are placed in each accommodating space, so that the experiment process aiming at a plurality of groups of rock samples can be completed in one experiment, the experiment frequency is reduced, and the experiment efficiency is improved; oil needs to be injected into the experimental container in each experiment so as to ensure the pressure in the experimental container, and the consumption of required oil products and other resources can be reduced by reducing the number of experiments, so that the resources are effectively saved; meanwhile, in the oil immersion experiment process, multiple groups of rock samples in the cavity are in the same external condition, so that experiment contrast among the multiple groups of rock samples is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of rock mechanics experiments, and in particular to a rock oil immersion experiment device. Background Art

[0002] Oil immersion experiments on rocks are an integral part of oil reserves in goaf areas, helping researchers and engineers better understand the physical and chemical properties of oil and gas reservoirs. Experiments usually require simulating high-pressure underground conditions to accurately assess the behavior of rock samples in actual reservoir environments.

[0003] For the current oil immersion experimental device, if multiple groups of rocks are tested at the same time in one experiment, multiple groups of rocks need to be stacked in the device. There is contact between the groups of rocks, and insufficient oil immersion will occur at the location where the rocks are in contact with each other, resulting in different oil immersion areas for each group of rocks, which is easy to cause experimental errors. In order to avoid experimental errors, only one group of rocks can be placed in the device. If multiple groups of rocks need to be tested, the number of experiments can only be increased, which reduces the experimental efficiency. It is also difficult to ensure that multiple groups of rocks are tested under the same external conditions. Utility Model Content

[0004] In order to solve at least one of the above technical problems, the present application provides a rock oil immersion experimental device, and the technical solution adopted is as follows:

[0005] The present application provides a rock oil immersion experimental device, which includes an experimental container and an isolation structure. A cavity is arranged inside the experimental container; the isolation structure is arranged in the cavity, and the isolation structure divides the cavity into a plurality of accommodating spaces, each of which is isolated from each other and is used to place experimental samples.

[0006] In certain embodiments of the present application, the isolation structure includes a partition, and the partition extends along the radial direction of the experimental container to the inner side wall of the experimental container, so that each of the accommodating spaces is at a different height.

[0007] In certain embodiments of the present application, an internal support structure is disposed inside the experimental container, one end of the internal support structure is connected to the partition, and the other end of the internal support structure is connected to the top or bottom of the experimental container.

[0008] In certain embodiments of the present application, the experimental container includes a top plate, a bottom plate and a surrounding wall, the top plate and the bottom plate clamp the surrounding wall, and the top plate, the bottom plate and the surrounding wall form the cavity.

[0009] In some embodiments of the present application, the surrounding wall is made of glass material.

[0010] In certain embodiments of the present application, the experimental container further includes an adjustment structure, wherein the adjustment structure connects the top plate and the bottom plate so that the top plate, the bottom plate and the surrounding wall form a whole.

[0011] In certain embodiments of the present application, the adjustment structure includes an adjustment rod and a fastener, one end of the adjustment rod passes through the top plate and is connected to the fastener; the other end of the adjustment rod passes through the bottom plate and is connected to the fastener.

[0012] In certain embodiments of the present application, the experimental container further includes a base, the base is provided with an external support structure, and the external support structure is connected to the bottom of the experimental container.

[0013] In certain embodiments of the present application, the rock oil immersion experimental device also includes a pressure control component, the experimental container is provided with an adjusting hole, the adjusting hole is used to inject oil into the cavity, the pressure control component is connected to the adjusting hole through a pipeline, and the pressure control component controls the amount of oil in the cavity to change the pressure in the cavity.

[0014] In certain embodiments of the present application, the regulating holes of several experimental containers are connected by pipelines so that each of the experimental containers and the pressure control assembly are connected in series.

[0015] The embodiments of the present application have at least the following beneficial effects: in the present application, there are several relatively independent accommodating spaces in the cavity of the experimental container, and a group of rock samples is placed in each accommodating space, so the experimental process for multiple groups of rock samples can be completed in one experiment, reducing the number of experiments and improving experimental efficiency; each experiment requires oil to be injected into the experimental container to ensure the pressure in the experimental container. The reduction in the number of experiments can reduce the consumption of required oil and other resources, thereby achieving effective conservation of resources; at the same time, during the oil immersion experiment, the multiple groups of rock samples in the cavity are under the same external conditions, which is conducive to experimental comparison between the multiple groups of rock samples.

[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 It is a schematic diagram of the structure of the experimental container in the rock oil immersion experimental device of the present application;

[0019] Figure 2It is a schematic diagram of the structure of placing rock samples in the cavity of the rock oil immersion experimental device of the present application;

[0020] Figure 3 It is a structural schematic diagram of multiple experimental containers and pressure control components connected in series in the rock oil immersion experimental device of the present application.

[0021] Reference numerals:

[0022] Rock sample 100; experimental container 101; top plate 102; bottom plate 103; surrounding wall 104; adjustment rod 105;

[0023] Base 201; Support legs 202;

[0024] Partition plate 301; inner support rod 302;

[0025] Pressure control assembly 401; pipeline 402; cylinder 403; oil drum 404; fiber optic pressure gauge 405. DETAILED DESCRIPTION

[0026] This section will combine Figures 1 to 3 Embodiments of the present application are described in detail, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0027] In the description of the present application, it should be understood that if the terms "center", "middle", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like are used to indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The features defined as "first" and "second" are used to distinguish the feature names, rather than having special meanings. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0028] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] The present application provides a more accurate and efficient device to simulate the oil-immersed environment in rock. Experiments in this oil-immersed environment help to deepen the understanding of the distribution of oil reservoirs in goaf areas and rock behavior, and provide strong support for optimizing production strategies and improving oil field production capacity.

[0030] The embodiment of the present application provides a rock oil immersion experimental device, which includes an experimental container 101, an isolation structure and a pressure control component 401. The rock sample 100 is placed inside the experimental container 101, and the pressure control component 401 is connected to the internal space of the experimental container 101. The pressure control component 401 ensures the pressure in the experimental container 101 by injecting oil into the internal space of the experimental container 101, thereby simulating the oil immersion environment in the rock.

[0031] Furthermore, the isolation structure divides the internal space of the experimental container 101 into several relatively independent subspaces, which facilitates the simultaneous experiment of multiple groups of rock samples 100 and improves the experimental efficiency. At the same time, it ensures that multiple groups of rock samples 100 are experimented under the same external conditions, which improves the scientificity of the experimental control of multiple groups of rock samples 100.

[0032] like Figure 1 As shown, in some examples, a cavity is provided inside the experimental container 101, and the cavity is used to place the rock sample 100. The rock sample 100 needs to be in an environment with a certain pressure to simulate the oil immersion in the rock, and the cavity is sealed to facilitate the pressure control component 401 to adjust the pressure in the cavity by injecting oil.

[0033] In some examples, the experimental container 101 includes a top plate 102, a bottom plate 103, and a surrounding wall 104. The surrounding wall 104 has openings at the top and bottom. The top plate 102 blocks the top opening of the surrounding wall 104, and the bottom plate 103 blocks the bottom opening of the surrounding wall 104. The top plate 102 and the bottom plate 103 clamp the surrounding wall 104, so that a relatively closed cavity is formed between the top plate 102, the bottom plate 103, and the surrounding wall 104. Specifically, the surrounding wall 104 is formed into a cylindrical tubular structure, and the top plate 102 and the bottom plate 103 are both set to be circular.

[0034] It can be understood that the area of ​​the top plate 102 is larger than the top opening area of ​​the surrounding wall 104, and the area of ​​the bottom plate 103 is larger than the bottom opening area of ​​the surrounding wall 104, so as to avoid a poor seal between the top plate 102 and the surrounding wall 104, and also avoid a poor seal between the bottom plate 103 and the surrounding wall 104, and ensure that the top plate 102 and the bottom plate 103 can effectively cover the port of the surrounding wall 104, so as to achieve a more stable installation and excellent sealing effect.

[0035] Among them, in order to further improve the sealing effect, a sealing ring is arranged between the top plate 102 and the top opening of the surrounding wall 104, and a sealing ring is also arranged between the bottom plate 103 and the bottom opening of the surrounding wall 104. The sealing ring can block the gap between the top plate 102 and the top opening of the surrounding wall 104, and can also block the gap between the bottom plate 103 and the bottom opening of the surrounding wall 104, providing additional sealing protection to prevent the intrusion of external contaminants or the leakage of experimental media.

[0036] In addition, the sealing ring can increase the friction between the top plate 102 and the surrounding wall 104, and can also increase the friction between the bottom plate 103 and the surrounding wall 104, thereby ensuring the relative position stability between the top plate 102, the bottom plate 103 and the surrounding wall 104, and playing a certain positioning role.

[0037] In some examples, the wall 104 is made of glass. Conventional rock oil immersion experimental devices are mostly made of hard materials such as metal materials. Although these materials have certain strength and pressure resistance, they are prone to deformation, corrosion or other forms of damage after long-term use in high temperature and high pressure environments. In addition, these materials are not transparent enough, and researchers cannot visually observe the microscopic changes of the rock sample 100 during the experiment through the experimental device, which limits the accuracy and efficiency of the experiment.

[0038] The enclosure 104 of the present application is made of a special glass material, which has high strength. On the one hand, it can withstand high pressure and temperature, and on the other hand, it has good transparency. Researchers can observe the behavior of the rock sample 100 in the simulated oil immersion environment through the enclosure 104. In addition, the chemical stability of the high-strength glass material is better than that of traditional materials, which can effectively resist corrosion and extend the service life of the device.

[0039] In some examples, the experimental container 101 also includes an adjustment structure, which is used to adjust the pre-tightening force of the top plate 102 and the bottom plate 103 clamping the surrounding wall 104 to ensure the integrity between the top plate 102, the bottom plate 103 and the surrounding wall 104 and prevent the top plate 102 and the bottom plate 103 from accidentally detaching from the surrounding wall 104.

[0040] Furthermore, the adjustment structure connects the top plate 102 and the bottom plate 103, and the adjustment structure is located outside the surrounding wall 104. Since the area of ​​the top plate 102 is larger than the area of ​​the top opening of the surrounding wall 104, and the area of ​​the bottom plate 103 is larger than the area of ​​the bottom opening of the surrounding wall 104, the top plate 102 has an installation edge extending from the surrounding wall 104, and the bottom plate 103 also has an installation edge extending from the surrounding wall 104, and the adjustment structure connects the installation edge of the top plate 102 and the installation edge of the bottom plate 103.

[0041] In some examples, the adjustment structure includes an adjustment rod 105 and a fastener, one end of the adjustment rod 105 passes through the mounting edge of the top plate 102 and is installed with a fastener; the other end of the adjustment rod 105 passes through the mounting edge of the bottom plate 103 and is installed with a fastener. The fasteners at both ends of the adjustment rod 105 squeeze the top plate 102 and the bottom plate 103 respectively, thereby providing a pre-tightening force for the top plate 102 and the bottom plate 103 to clamp the surrounding wall 104.

[0042] Furthermore, both end side walls of the adjusting rod 105 are provided with external threads, and the fasteners are nuts, which are fastened by threaded connection.

[0043] It is understandable that there are several adjustment rods 105, and when the surrounding wall 104 is formed into a cylindrical tubular structure, the adjustment rods 105 are arranged around the surrounding wall 104 in a circumferential distribution. Specifically, six adjustment rods 105 are arranged.

[0044] In some examples, the experimental container 101 further includes a base 201, which is connected to the experimental container 101 to improve the stability of the experimental container 101. The base 201 is provided with an external support structure, which is connected to the bottom of the experimental container 101, that is, connected to the bottom plate 103.

[0045] Further, the outer support structure includes an outer support rod, the end of which is connected to the bottom plate 103. It is understood that at least three outer support rods are provided to prevent the experimental container 101 from tilting. Specifically, when the bottom plate 103 is set to be circular, the outer support rods are distributed in a circumference, and four outer support rods are provided.

[0046] In some examples, a support leg 202 is provided at the bottom of the base 201, a bolt is provided at the top of the support leg 202, the end of the bolt passes through the base 201 and is connected with a nut, so that the support leg 202 is installed on the base 201 to achieve stable support of the device. Specifically, three support legs 202 are provided.

[0047] like Figure 1 and Figure 2As shown, the isolation structure is disposed in the cavity, and a plurality of accommodating spaces are divided in the cavity, and a group of rock samples 100 are placed in each accommodating space. Due to the existence of the isolation structure, the rock samples 100 can only be placed in the corresponding accommodating space, and the rock samples 100 are prevented from moving to the adjacent accommodating space, and the accommodating spaces are isolated from each other.

[0048] Furthermore, when the experiment requires that each group of rock samples 100 needs to be in the same environment, the isolation structure allows oil exchange between adjacent containing spaces; when the experiment requires that each group of rock samples 100 needs to be in different environments, the isolation structure has a sealing effect and does not allow oil exchange between adjacent containing spaces. At this time, each containing space is filled with oil separately.

[0049] In some examples, the isolation structure includes a partition 301. When there is only one partition 301, the cavity is divided into two accommodating spaces. The partition 301 is approximately horizontally arranged, and the partition 301 extends along the radial direction of the experimental container 101 to the inner side wall of the experimental container 101, that is, extends to the inner side wall of the surrounding wall 104. At this time, the top of the partition 301 is divided into one accommodating space, and the bottom of the partition 301 is divided into another accommodating space. It can be understood that the accommodating spaces divided by the partition 301 are at different heights.

[0050] In some examples, when the partition 301 is disposed approximately horizontally, the partition 301 needs to have a certain height to ensure that the accommodation space at the top and bottom of the partition 301 has sufficient volume.

[0051] The experimental container 101 is provided with an internal support structure, which is provided on the bottom plate 103 and extends toward the middle of the cavity, and the end of the internal support structure is connected to the partition 301. Alternatively, the internal support structure is provided on the top plate 102 and extends toward the middle of the cavity, and the end of the internal support structure is connected to the partition 301. Specifically, the internal support structure includes internal support rods 302, and four internal support rods 302 are provided.

[0052] It is worth noting that the partition 301 can avoid contact between the groups of rock samples 100, and prevent the groups of rocks from being insufficiently immersed in oil due to contact with each other, resulting in different oil immersion areas of the groups of rocks. On this basis, when the partition 301 allows oil exchange in adjacent accommodating spaces, each group of rock samples 100 can be experimented with at the same time under the same conditions, reducing the number of experiments and improving experimental efficiency. At the same time, it is conducive to experimental control between multiple groups of rock samples 100. When the partition 301 does not allow oil exchange in adjacent accommodating spaces, it helps to achieve more precise control and management during the experiment. For example, different pressure or temperature conditions can be set in different accommodating spaces to explore the impact of variables on the oil immersion effect.

[0053] like Figure 3 As shown, in some examples, the experimental container 101 is provided with an adjustment hole for injecting oil into the cavity, and specifically, the adjustment hole is provided on the surrounding wall 104. Further, the pressure control component 401 is connected to the adjustment hole through a pipe 402 to change the pressure in the cavity by controlling the amount of oil injected.

[0054] Among them, the pressure control component 401 includes a cylinder 403, an oil barrel 404 and a controller. The oil barrel 404 transports the oil to the position of the cylinder 403, and the cylinder 403 pushes the oil to the cavity. An optical fiber pressure gauge 405 is arranged in the cylinder 403, and the optical fiber pressure gauge 405 is electrically connected to the controller. The optical fiber pressure gauge 405 can feed back the pressure information in the cavity to the controller, so as to monitor the oil pressure value in real time. When the oil pressure value reaches the preset value, the controller sends a stop signal to the cylinder 403, and the cylinder 403 stops injecting oil into the cavity. The controller displays the oil pressure value on the external hydraulic gauge, which is convenient for the staff to understand the pressure changes in the cavity.

[0055] Specifically, when the piston in the cylinder 403 is at the initial position, the oil in the oil barrel 404 is delivered to the cylinder 403. When the oil in the cylinder 403 has been completely injected into the cavity, the piston needs to be reset so that the oil can be delivered to the cylinder 403 again. Therefore, a reset spring is provided on the piston in the cylinder 403 to drive the piston to reset.

[0056] like Figure 3 As shown, in some examples, the regulating hole facilitates oil filling and pressurization of the cavity, and can also achieve connectivity with other experimental containers 101, thereby expanding the application scope and function of the experiment.

[0057] Specifically, the regulating holes of several experimental containers 101 are connected through pipes 402, so that the experimental containers 101 are connected in series. Among them, any experimental container 101 is connected to the pressure control component 401, so that the cavities in each experimental container 101 are at the same pressure. The connection of multiple experimental containers 101 further expands the scope of the experiment, simulates a larger-scale reservoir environment, and improves the flexibility and diversity of the experiment.

[0058] During use, firstly, the number of experimental containers 101 is selected according to the number of groups of rock samples 100 required;

[0059] Install the support legs 202 and the base 201 to provide a stable platform for the device. Pass the bolts on the top of the support legs 202 through the base 201 and connect the nuts to achieve stable support for the device;

[0060] After installing the base 201, fix the lower end of the outer support rod to the table of the base 201, and fix the upper end to the bottom plate 103 to support the main oil-immersed part;

[0061] An inner support rod 302 is installed on the top of the bottom plate 103, and a partition plate 301 is installed on the upper end of the inner support rod 302;

[0062] After installing the inner support rod 302 and the partition 301, align the surrounding wall 104 with the sealing ring on the bottom plate 103 for installation;

[0063] The rock sample 100 is placed in the cavity. The partition 301 divides the cavity into a plurality of accommodation spaces. When the rock sample 100 is placed, the partition 301 can be removed first. After the lower accommodation space is filled with the rock sample 100, the partition 301 is installed, and then the rock sample 100 is placed in the accommodation space above the partition 301.

[0064] A top plate 102 is placed on the top of the surrounding wall 104, and an adjustment rod 105 is installed, which can be connected to the top plate 102 and the bottom plate 103. The adjustment rod 105 is fixed with a nut to achieve a precise adjustment mechanism. The operator can adjust the gap between the top plate 102, the bottom plate 103 and the surrounding wall 104 as needed, which helps to maintain a sealed environment in the experiment, prevent oil from spilling, and effectively avoid device contamination caused by oil leakage;

[0065] When the device is assembled and the rock sample 100 is placed, oil is injected through the oil injection hole of the top plate 102 so that the rock sample inside the glass shell is completely immersed. After the oil injection is completed, the oil injection hole is sealed;

[0066] When multiple groups of experiments are conducted and several experimental containers 101 are needed, the experimental containers 101 are connected in series through the pipeline 402, and the same pressure control component 401 is used to inject oil and pressurize the cavity according to the set pressure value. The optical fiber pressure gauge 405 obtains the real-time oil pressure and displays it on the external hydraulic gauge. At the same time, the oil pressure is controlled to ensure the accuracy of the experiment.

[0067] In the description of this specification, if the reference terms "one embodiment", "some examples", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" appear, it means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0068] The above describes the implementation methods of the present application in detail in conjunction with the accompanying drawings, but the present application is not limited to the above implementation methods. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present application.

Claims

1. A rock oil immersion experimental device, characterized in that: include: An experimental container, wherein a cavity is arranged inside the experimental container; An isolation structure is provided in the cavity, and the isolation structure divides the cavity into a plurality of accommodating spaces, each of the accommodating spaces is isolated from each other, and each of the accommodating spaces is used to place experimental samples.

2. The rock oil immersion experimental device according to claim 1 is characterized in that: The isolation structure comprises a partition plate, and the partition plate extends along the radial direction of the experimental container to the inner side wall of the experimental container, so that each of the accommodating spaces is at a different height.

3. The rock oil immersion experimental device according to claim 2 is characterized in that: An inner support structure is arranged inside the experimental container, one end of the inner support structure is connected to the partition, and the other end of the inner support structure is connected to the top or bottom of the experimental container.

4. The rock oil immersion experimental device according to claim 1 is characterized in that: The experimental container comprises a top plate, a bottom plate and a surrounding wall. The top plate and the bottom plate clamp the surrounding wall, and the top plate, the bottom plate and the surrounding wall form the cavity.

5. The rock oil immersion experimental device according to claim 4 is characterized in that: The surrounding wall is made of glass material.

6. The rock oil immersion experimental device according to claim 4, characterized in that: The experimental container further comprises an adjusting structure, wherein the adjusting structure connects the top plate and the bottom plate so that the top plate, the bottom plate and the surrounding wall form a whole.

7. The rock oil immersion experimental device according to claim 6, characterized in that: The adjustment structure comprises an adjustment rod and a fastener, one end of the adjustment rod passes through the top plate and is connected to the fastener; the other end of the adjustment rod passes through the bottom plate and is connected to the fastener.

8. The rock oil immersion experimental device according to claim 1, characterized in that: The experimental container further comprises a base, wherein the base is provided with an external support structure, and the external support structure is connected to the bottom of the experimental container.

9. The rock oil immersion experimental device according to claim 1, characterized in that: The rock oil immersion experimental device also includes a pressure control component. The experimental container is provided with an adjustment hole, and the adjustment hole is used to inject oil into the cavity. The pressure control component is connected to the adjustment hole through a pipeline. The pressure control component controls the amount of oil in the cavity to change the pressure in the cavity.

10. The rock oil immersion experimental device according to claim 9, characterized in that: The regulating holes of several experimental containers are connected through pipelines so that the experimental containers and the pressure control components are connected in series.

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