A device for detecting oil displacement effect

Abstract

The application relates to an oil displacement effect detection device, which comprises a test box, a carbon dioxide control mechanism and a heating device are arranged in the test box, the test box is divided into a first installation layer and a second installation layer, the first installation layer and the second installation layer, a first scalar box is arranged on the first installation layer, a second scalar box is arranged on the second installation layer, the first scalar box and the second scalar box have the same volume, a first electromagnetic valve is arranged on the second installation layer, one end of the first electromagnetic valve is connected to the bottom of the first scalar box, the other end of the first electromagnetic valve faces the second scalar box, when the first electromagnetic valve is opened, crude oil in the first scalar box flows into the second scalar box along the first electromagnetic valve by gravity, a detection assembly is arranged in the test box, the detection assembly and the first electromagnetic valve are electrically connected with a controller, the detection assembly is used for detecting the liquid level of the first scalar box and the liquid level of the second scalar box, and the application has the effect that the influence of carbon dioxide on the oil displacement effect can be conveniently detected under different temperature conditions.

Description

Technical Field

[0001] This application relates to the field of oil displacement testing equipment, and in particular to an oil displacement effect testing device. Background Technology

[0002] Carbon dioxide flooding is an enhanced oil recovery (EOR) technology that improves oil recovery by injecting carbon dioxide into the reservoir. Its core principle is to utilize the properties of carbon dioxide to reduce viscosity and increase volume expansion after dissolving in crude oil. At the same time, it promotes crude oil flow and improves displacement efficiency by changing rock wettability and reducing oil-water interfacial tension.

[0003] Among them, utility model patent, publication (announcement) number: CN214894640U, discloses an oil displacement effect detection device, including: a carbon dioxide storage tank connected to the dissolution chamber via a first pipe, a carbon dioxide recovery tank connected to the dissolution chamber via a second pipe, crude oil of a preset weight placed in the dissolution chamber, electromagnetic valves installed on both the first and second pipes, a temperature sensor and an electric heater installed in the dissolution chamber, a weighing plate installed at the bottom of the dissolution chamber, and an air pump installed in the carbon dioxide recovery tank. The electromagnetic valves, temperature sensor, electric heater, weighing plate, and air pump are all connected to a controller; the controller is also connected to a door lock controller of the dissolution chamber. One side of the bottom of the dissolution chamber is hinged to the push rod of a hydraulic cylinder, and the other side is hinged to a load-bearing block. The bottom of the hydraulic cylinder and the bottom of the load-bearing block are both fixed to a base. The dissolution chamber is in a horizontal state, and the door lock controller controls the opening of the door on the same side as the load-bearing block. Using this utility model, it is possible to detect the optimal temperature for carbon dioxide to dissolve oil, which is beneficial for its widespread application.

[0004] In practical applications, carbon dioxide needs to be dissolved in the crude oil first. After the treatment is completed, the controller opens the door to allow the crude oil in the dissolution chamber to flow out through the door. After a preset time, the controller closes the door. By comparing the weight deviation measured by the weighing plate within the preset time, the oil displacement effect of carbon dioxide at different temperatures can be measured. The operation is complicated, and the inconsistency between the closing and opening times of the control door in the above operation will affect the calculation results, indicating room for improvement. Utility Model Content

[0005] To facilitate the detection of the effect of carbon dioxide on oil displacement under different temperature conditions, this application provides an oil displacement effect detection device.

[0006] The oil displacement effect testing device provided in this application adopts the following technical solution: An oil displacement effect testing device includes a test chamber containing a carbon dioxide control mechanism and a heating device. The test chamber is divided into a first mounting layer and a second mounting layer. A first scalar volumetric container is mounted on the first mounting layer, and a second scalar volumetric container is mounted on the second mounting layer. The first and second scalar volumetric containers have the same volume. A first solenoid valve is mounted on the second mounting layer, with one end connected to the bottom of the first scalar volumetric container and the other end facing the second scalar volumetric container. When the first solenoid valve is opened, crude oil in the first scalar volumetric container flows into the second scalar volumetric container by gravity along the first solenoid valve. A detection component is provided inside the test chamber. The detection component and the first solenoid valve are electrically connected to a controller. The detection component is used to detect the liquid levels in the first and second scalar volumetric containers.

[0007] By adopting the above technical solution, carbon dioxide is injected into the test chamber through a carbon dioxide control mechanism, or carbon dioxide is extracted from the test chamber, so that the crude oil in the first scalar volume box can be fully dissolved in carbon dioxide. The test chamber is heated by a heating device. After the crude oil in the first scalar volume box is dissolved in carbon dioxide and heated, the opening and closing time of the first solenoid valve can be controlled by a controller. When the first solenoid valve of the first scalar volume box is opened, the crude oil in the first scalar volume box flows into the second scalar volume box by gravity. Since the first scalar volume box and the second scalar volume box have the same volume, the crude oil level in the first scalar volume box and the second scalar volume box can be detected by a detection component. The response speed is faster, which plays a positive guiding role in improving the convenience of detecting the effect of carbon dioxide on oil displacement under different temperature conditions.

[0008] Preferably, a flow guide is provided at the bottom of the first scalar box.

[0009] By adopting the above technical solution, the flow guide section helps to improve the smoothness of the crude oil in the first scalar volume box flowing through the first solenoid valve to the second scalar volume box.

[0010] Preferably, the detection component includes a first ultrasonic level gauge and a second ultrasonic level gauge, wherein the first ultrasonic level gauge is disposed on the first mounting layer above the first scalar box, and the second ultrasonic level gauge is disposed on the second mounting layer above the second scalar box.

[0011] By adopting the above technical solution, the crude oil level in the first scalar box is detected by the first ultrasonic level gauge, and the crude oil level in the second scalar box is detected by the second ultrasonic level gauge, thereby obtaining the difference in crude oil levels in the first and second scalar boxes. The effect of carbon dioxide on crude oil displacement effect at different temperatures can be obtained from the level difference value.

[0012] Preferably, a stirring mechanism is provided on the first mounting layer, the stirring mechanism being used to stir the crude oil in the first scalar box.

[0013] By adopting the above technical solution, the crude oil is stirred by the stirring mechanism, which helps to increase the contact between carbon dioxide and crude oil, and facilitates better dissolution of carbon dioxide into crude oil.

[0014] Preferably, the stirring mechanism is provided with an air supply pipe, the outlet end of the air supply pipe faces the first scalar box, and the inlet end of the air supply pipe is connected to the carbon dioxide control mechanism.

[0015] By adopting the above technical solution, carbon dioxide is injected into the crude oil while it is being stirred by the stirring mechanism through the gas supply pipe, in order to simulate the actual production process and play a positive guiding role in improving the accuracy of the test results.

[0016] Preferably, a limiting groove is provided on the second mounting layer, and the contour of the limiting groove is adapted to the bottom contour of the second scalar box.

[0017] By adopting the above technical solution, the placement position of the second scalar box on the second mounting layer is limited by the limiting groove, so that the placement position of the second scalar box on the second mounting layer is relatively fixed, reducing the probability that the crude oil flowing out of the first solenoid valve cannot accurately flow into the second scalar box due to the positional deviation between the placement position of the second scalar box and the first solenoid valve.

[0018] Preferably, the test chamber is movably connected to an opening and closing door, and the test chamber is provided with a sealing layer. When the opening and closing door is closed on the test chamber, the opening and closing door abuts against the sealing layer.

[0019] By adopting the above technical solution, the combination of the opening and closing door and the sealing layer helps to improve the sealing performance inside the test chamber and prevent carbon dioxide leakage.

[0020] Preferably, the test box is equipped with a magnetic lock, which is used to attract the opening and closing door to the test box, and the magnetic lock is electrically connected to the controller.

[0021] By adopting the above technical solution, the opening and closing of the test box can be realized by controlling the power on and off of the magnetic lock through the controller. It has high stability and does not require a complex mechanical structure to lock the opening and closing door to the test box.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. The opening and closing time of the first solenoid valve can be controlled by the controller, so that when the first solenoid valve of the crude oil in the first scalar box is opened, it flows into the second scalar box by gravity. Since the first scalar box and the second scalar box have the same volume, the crude oil level in the first scalar box and the second scalar box can be detected by the detection component. The response speed is faster, which plays a positive guiding role in improving the convenience of detecting the effect of carbon dioxide on oil displacement under different temperature conditions. 2. Stirring the crude oil with a stirring mechanism helps to increase the contact between carbon dioxide and crude oil, making it easier for carbon dioxide to dissolve into the crude oil; 3. The opening and closing of the test box can be achieved by controlling the power on and off of the magnetic lock through the controller. It has high stability and does not require a complex mechanical structure to lock the opening and closing door to the test box. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an oil displacement effect detection device according to an embodiment of this application.

[0024] Figure 2 yes Figure 1 A magnified structural diagram of part A in the middle.

[0025] Figure 3 This is a schematic diagram showing the cooperation relationship between the first scalar box and the first solenoid valve in an oil displacement effect detection device according to an embodiment of this application.

[0026] Figure 4 yes Figure 3 A schematic diagram of the cross-sectional structure.

[0027] Explanation of reference numerals in the attached drawings: 1. Test chamber; 11. First mounting layer; 12. Second mounting layer; 121. Limiting groove; 2. Carbon dioxide control mechanism; 21. Gas supply assembly; 22. Collection assembly; 3. Heating device; 31. Heating element; 32. Temperature sensor; 4. First scalar box; 5. Second scalar box; 6. First solenoid valve; 7. Detection assembly; 71. First ultrasonic level gauge; 72. Second ultrasonic level gauge; 8. Flow guide; 81. Mounting hole; 9. Stirring mechanism; 91. Stirring assembly; 911. Drive motor; 912. Stirring rod; 92. Lifting assembly; 921. Drive cylinder; 922. Mounting base; 10. Gas supply pipe; 101. Opening and closing door; 1011. Sealing layer; 103. Fixing base. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0029] This application discloses an oil displacement effect testing device. (Refer to...) Figure 1 and Figure 2An oil displacement effect testing device includes a test chamber 1, which contains a carbon dioxide control mechanism 2 and a heating device 3. The test chamber 1 is divided into a first mounting layer 11 and a second mounting layer 12. A first scalar box 4 is mounted on the first mounting layer 11, and a second scalar box 5 is mounted on the second mounting layer 12. The first scalar box 4 and the second scalar box 5 have the same volume. A first solenoid valve 6 is mounted on the second mounting layer 12. One end of the first solenoid valve 6 is connected to the bottom of the first scalar box 4, and the other end faces the second scalar box 5. When the first solenoid valve 6 is opened, the crude oil in the first scalar box 4 flows into the second scalar box 5 by gravity along the first solenoid valve 6. A detection component 7 is installed in the test chamber 1. The detection component 7 and the first solenoid valve 6 are electrically connected to the controller. The detection component 7 is used to detect the liquid level of the first scalar box 4 and the liquid level of the second scalar box 5.

[0030] Specifically, the carbon dioxide control mechanism 2 includes a gas supply component 21 and a collection component 22. The gas supply component 21 is used to supply carbon dioxide into the test chamber 1, and the collection component 22 is used to collect the carbon dioxide in the test chamber 1. At the same time, a vacuuming component is installed on the test chamber 1 for vacuuming the test chamber 1. This is an existing component, and its specific composition and working principle will not be described in detail here.

[0031] Furthermore, a door 101 is movably connected to the test chamber 1, and a sealing layer 1011 is provided on the test chamber 1. When the door 101 is closed on the test chamber 1, the door 101 abuts against the sealing layer 1011. The door 101 is hinged to the test chamber 1, so that the door 101 can be smoothly opened or closed along the test chamber 1.

[0032] Furthermore, the sealing layer 1011 is made of silicone material and is circumferentially installed on the end face of the test chamber 1 that abuts against the opening and closing door 101. Thus, when the opening and closing door 101 is closed on the test chamber 1, the soft and easily deformable properties of silicone material help to fill the gap between the opening and closing door 101 and the test chamber 1, ensuring that the test chamber 1 is sealed when the opening and closing door 101 is closed on the test chamber 1, so as to facilitate the vacuuming operation of the test chamber 1 by the vacuuming assembly.

[0033] Furthermore, a magnetic lock is provided on the test chamber 1. The magnetic lock is used to attract the opening and closing door 101 to the test chamber 1. The magnetic lock is electrically connected to the controller. The magnetic lock is installed on the end face of the test chamber 1 where the opening and closing door 101 abuts. Since the magnetic lock is electrically connected to the controller, the opening and closing door 101 can be opened or closed along the test chamber 1 by controlling the power on and off of the magnetic lock through the controller. It has high stability and does not require a complex mechanical structure to lock the opening and closing door 101 to the test chamber 1.

[0034] The heating device 3 includes a heating element 31 and a temperature sensor 32. The heating element 31 and the temperature sensor 32 are electrically connected to the controller. The heating element 31 can be an electric heating wire or a heating plate. The heating element 31 is installed in the first mounting layer 11. The temperature sensor 32 is installed in the first mounting layer 11 on the side away from the heating element 31. The temperature inside the test chamber 1 is detected by the temperature sensor 32.

[0035] It should be noted that the magnetic lock is a device that uses the principle of generating a magnetic field by passing an electric current through a coil, thereby generating a magnetic attraction or magnetic repulsion force. When the magnetic lock is energized, it can attract ferrous or magnetic objects. When the magnetic lock is de-energized, the attraction between the magnetic lock and the ferrous or magnetic objects disappears. This is existing technology.

[0036] Meanwhile, the controller is a PLC (Programmable Logic Controller), which includes multiple functions such as logic control, timing control, analog control, and multi-machine communication. It also has a human-machine interface to facilitate the control and adjustment of the PLC, making it an existing controller.

[0037] The specific composition and working principle of both will not be elaborated here.

[0038] At the same time, refer to Figure 2 , Figure 3 as well as Figure 4 The first scalar volumetric box 4 and the second scalar volumetric box 5 have the same volume, shape, and size (i.e., the same model) to facilitate the detection of the liquid level in the first scalar volumetric box 4 and the liquid level in the second scalar volumetric box 5 by the detection component 7. For ease of explanation, the first scalar volumetric box 4 will be described in detail.

[0039] Specifically, the bottom of the first scalar box 4 is provided with a flow guide 8. The outer contour of the first scalar box 4 is a standard cylindrical shape. The flow guide 8 is formed by the bottom of the first scalar box 4 being recessed along the thickness direction. The cross-sectional shape of the flow guide 8 is a frustum cone shape.

[0040] The guide section 8 has a mounting hole 81. The inlet end of the first solenoid valve 6 is threaded into the mounting hole 81, so that the crude oil located in the guide section 8 can flow smoothly into the first solenoid valve 6 along the outlet end of the first solenoid valve 6.

[0041] It should be noted that the mounting hole 81 on the second scalar box 5 is sealed with a rubber plug (not shown in the figure) to prevent crude oil leakage inside the second scalar box 5.

[0042] Furthermore, a limiting groove 121 is provided on the second mounting layer 12, the outline of which is adapted to the bottom outline of the second scalar box 5. The limiting groove 121 is formed by a recess in the bottom of the measuring tank along the thickness direction. The limiting groove 121 limits the placement position of the second scalar box 5 on the second mounting layer 12, making the placement position of the second scalar box 5 on the second mounting layer 12 relatively fixed. This reduces the probability that the crude oil flowing out of the first solenoid valve 6 cannot accurately flow into the second scalar box 5 due to a positional deviation between the placement position of the second scalar box 5 and the first solenoid valve 6.

[0043] Reference Figure 1 and Figure 2 A stirring mechanism 9 is provided on the first mounting layer 11. The stirring mechanism 9 is used to stir the crude oil in the first scalar box 4. The stirring mechanism 9 is electrically connected to the controller. The stirring mechanism 9 includes a stirring component 91 and a lifting component 92. The stirring component 91 includes a drive motor 911 and a stirring rod 912. The lifting component 92 includes a drive cylinder 921 and a mounting base 922.

[0044] Specifically, the drive cylinder 921 is mounted on the first mounting layer 11, located at the top of the test chamber 1, with the piston rod of the drive cylinder 921 facing the first scalar box 4, and the mounting base 922 is coaxially fixed with the piston rod of the drive cylinder 921.

[0045] Furthermore, the drive motor 911 is mounted on the mounting base 922, and the output shaft of the drive motor 911 faces the first scalar box 4. A fixing base 103 is mounted on the stirring rod 912. The stirring rod 912 is connected to the output shaft of the drive motor 911 by bolts through the fixing base 103, and the spatial position relationship between the stirring rod 912 and the output shaft of the drive motor 911 is perpendicular to each other.

[0046] Therefore, when it is necessary to stir the crude oil in the first scalar volume box 4, the controller controls the piston rod of the drive cylinder 921 to carry the drive motor 911 to move towards the first scalar volume box 4. When the stirring rod 912, which is fixed to the output shaft of the drive motor 911, is located in the crude oil in the first scalar volume box 4, the controller controls the output shaft of the drive motor 911 to drive the stirring rod 912 to rotate at a constant speed along the first scalar volume box 4, thereby achieving the purpose of stirring the crude oil in the first scalar volume box 4. After stirring is completed, the controller controls the piston rod of the drive cylinder 921 to retract, so that the drive motor 911 follows the piston rod of the drive cylinder 921 to move away from the first scalar volume box 4 until the stirring rod 912 separates from the crude oil. This is beneficial to increase the contact degree between carbon dioxide and crude oil, making it easier for carbon dioxide to dissolve in the crude oil.

[0047] The key feature is that the stirring rod 912 is made of glass, and a mounting position is pre-set at the midpoint along its length. Bolts are used to connect the stirring rod 912 to the output shaft of the drive motor 911 via this mounting position. Because the stirring rod 912 is made of glass, its surface is relatively smooth. After the stirring rod 912 separates from the crude oil, the crude oil adhering to it will quickly drip into the first scalar container 4 under gravity. This helps reduce the probability of excessive crude oil adhering to the stirring rod 912 affecting the test results.

[0048] Correspondingly, the stirring mechanism 9 is equipped with an air supply pipe 10, with the outlet of the air supply pipe 10 facing the first scalar box 4 and the inlet of the air supply pipe 10 connected to the carbon dioxide control mechanism 2. The air supply pipe 10 is fixed to the drive motor 911, and the outlet of the air supply pipe 10 faces the stirring rod 912. By driving the stirring rod 912 to stir the crude oil through the output shaft of the drive motor 911 via the air supply pipe 10, carbon dioxide is introduced into the crude oil to simulate the actual production process, which plays a positive guiding role in improving the accuracy of the test results.

[0049] Reference Figure 1 and Figure 2 The detection component 7 includes a first ultrasonic level gauge 71 and a second ultrasonic level gauge 72. The first ultrasonic level gauge 71 is disposed on the mounting layer above the first scalar box 4, and the second ultrasonic level gauge 72 is disposed on the second mounting layer 12 above the second scalar box 5.

[0050] Specifically, the detection end of the first ultrasonic level gauge 71 faces the first scalar box 4, and the detection end of the second ultrasonic level gauge 72 faces the second scalar box 5. Furthermore, the detection ends of the first ultrasonic level gauge 71 and the second ultrasonic level gauge 72 are aligned in a straight line.

[0051] Therefore, the level of crude oil in the first scalar box 4 is detected by the first ultrasonic level gauge 71, and the level of crude oil in the second scalar box 5 is detected by the second ultrasonic level gauge 72, thereby obtaining the level difference of crude oil in the first scalar box 4 and the second scalar box 5. The effect of carbon dioxide on the oil displacement effect of crude oil at different temperatures can be obtained from the level difference value.

[0052] It should also be noted that in practical applications, the detection of the effect of carbon dioxide on oil displacement at different temperatures is a relatively broad value. Therefore, during the crude oil flow process, the amount of crude oil adhering to the first solenoid valve 6 or to the stirring rod 912 has a negligible impact on the detection results.

[0053] The following is a brief description of the overall workflow.

[0054] First, the operator injects crude oil into the first scalar volumetric container 4 and sets the test temperature and the opening and closing time of the first solenoid valve 6 via the controller. Then, the opening and closing door 101 is closed onto the test chamber 1, and the magnetic lock is activated via the controller. Simultaneously, the controller activates the first ultrasonic level gauge 71 and the second ultrasonic level gauge 72 to detect the liquid levels in the first and second scalar volumetric containers 4 and 5, respectively. Next, the vacuum assembly is activated to begin evacuating the test chamber 1. After evacuation, the controller controls the carbon dioxide control mechanism 2 to supply carbon dioxide to the test chamber 1 and activates the heating device 3. The heating element 31 raises the temperature inside the test chamber 1, and the temperature sensor 32 detects the temperature inside the test chamber 1. Simultaneously, the stirring mechanism 9 stirs the crude oil in the first scalar volumetric container 4. After stirring is complete... The stirring mechanism 9 stops working. When the temperature sensor 32 detects that the temperature inside the test chamber 1 has reached the preset test temperature, the heating element 31 stops working. Subsequently, the controller controls the first solenoid valve 6 to open, so that the crude oil in the first scalar box 4 flows into the second scalar box 5. After the set opening and closing time of the first solenoid valve 6 is reached, the first solenoid valve 6 will close. The controller controls the first ultrasonic level gauge 71 and the second ultrasonic level gauge 72 to detect the crude oil level in the first scalar box 4 and the second scalar box 5 again, so as to obtain the difference in crude oil level between the first scalar box 4 and the second scalar box 5. Since the opening and closing time of the first solenoid valve 6 is fixed, the temperature inside the test chamber 1 can be changed by changing the heating element 31. By detecting the difference in level between the first scalar box 4 and the second scalar box 5, the effect of carbon dioxide oil displacement at different temperatures can be understood.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An oil displacement effect testing device, comprising a test chamber (1), wherein a carbon dioxide control mechanism (2) and a heating device (3) are provided inside the test chamber (1), characterized in that: The test chamber (1) is divided into a first mounting layer (11) and a second mounting layer (12). A first scalar box (4) is mounted on the first mounting layer (11), and a second scalar box (5) is mounted on the second mounting layer (12). The first scalar box (4) and the second scalar box (5) have the same volume. A first solenoid valve (6) is mounted on the second mounting layer (12), with one end of the first solenoid valve (6) connected to the first scalar box (4). At the bottom, the other end of the first solenoid valve (6) faces the second scalar box (5). When the first solenoid valve (6) is opened, the crude oil in the first scalar box (4) flows into the second scalar box (5) by gravity along the first solenoid valve (6). The test box (1) is equipped with a detection component (7). The detection component (7) and the first solenoid valve (6) are electrically connected to the controller. The detection component (7) is used to detect the liquid level of the first scalar box (4) and the liquid level of the second scalar box (5).

2. The oil displacement effect detection device according to claim 1, characterized in that: The bottom of the first scalar box (4) is provided with a flow guide (8).

3. The oil displacement effect detection device according to claim 1, characterized in that: The detection component (7) includes a first ultrasonic level gauge (71) and a second ultrasonic level gauge (72). The first ultrasonic level gauge (71) is disposed on the first mounting layer (11) above the first scalar box (4), and the second ultrasonic level gauge (72) is disposed on the second mounting layer (12) above the second scalar box (5).

4. The oil displacement effect detection device according to claim 1, characterized in that: A stirring mechanism (9) is provided on the first mounting layer (11), which is used to stir the crude oil in the first scalar box (4).

5. The oil displacement effect detection device according to claim 4, characterized in that: The stirring mechanism (9) is provided with an air supply pipe (10), the air outlet of the air supply pipe (10) faces the first scalar box (4), and the air inlet of the air supply pipe (10) is connected to the carbon dioxide control mechanism (2).

6. The oil displacement effect detection device according to claim 1, characterized in that: A limiting groove (121) is provided on the second mounting layer (12), and the outline of the limiting groove (121) is adapted to the bottom outline of the second scalar box (5).

7. The oil displacement effect detection device according to claim 1, characterized in that: The test box (1) is movably connected to an opening and closing door (101), and a sealing layer (1011) is provided on the test box (1). When the opening and closing door (101) is closed on the test box (1), the opening and closing door (101) abuts against the sealing layer (1011).

8. The oil displacement effect detection device according to claim 7, characterized in that: A magnetic lock is provided on the test box (1), which is used to attract the opening and closing door (101) to the test box (1). The magnetic lock is electrically connected to the controller.

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