Visual flow experiment device and method for simulating dynamic of conventional sucker rod pumping

Abstract

The present application relates to the technical field of low-permeability oil and gas reservoir development, and is a visual flow experiment device and experiment method for simulating conventional rod pumping dynamic, comprising a constant-pressure water supply device, a micro displacement device, a measuring cylinder and a vacuum suction device, the constant-pressure water supply device outlet is communicated with the measuring cylinder bottom inlet through a first water supply pipeline, the vacuum suction device top inlet is fixedly communicated with a vacuum hose, the vacuum hose inlet end extends into the measuring cylinder, and the influence of the change amplitude of the bottom hole pressure on the percolation is controlled by simulating different pumping unit stroke and frequency conditions.The present application has simple structure, convenient operation, easy measurement and calculation of various pressures, and the experiment phenomenon is easy to observe, record and analyze, the conventional rod pumping system can be simulated, the dynamic change of different drainage systems and the influence of the bottom hole pressure disturbance on the reservoir percolation are studied, the best production system parameters under different reservoir conditions are optimized, thereby reducing the production cost and improving the reservoir recovery.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of low-permeability oil and gas reservoir development, and is a visual flow experiment device and experiment method for simulating conventional rod pumping dynamic. BACKGROUND

[0002] Factors affecting oil and gas field recovery efficiency include internal factors and external factors. In the development process of oil and gas fields, internal factors and external factors of oil and gas fields are comprehensively considered to maximize the recovery efficiency of oil and gas fields. Since oil fields are buried underground and are hidden entities, oil, gas and water are constantly flowing and changing in the process of exploitation. This rheological property is a feature that other solid mines do not have. Therefore, to effectively develop oil fields, various measures need to be adjusted during the development process to adapt to changing conditions; at the same time, oil layers need to be continuously transformed so that they can change and develop in the direction that people have predetermined and are beneficial to development. This is a problem that needs to be continuously researched and solved in the process of oil field development. In addition, during the development of oil fields, engineering technology that can adapt to changes in underground conditions is needed to achieve effective development goals. That is, advanced oil production technology is needed.

[0003] Rod pumping systems are widely used in oil fields at home and abroad, and have been the dominant artificial lifting method in mechanical oil production methods. Rod pumping technology is the main method of mechanical oil production, and the number of wells accounts for about 95% of the total number of artificial lifting wells. China's oil pumping machines, rods, pumps and corresponding supporting technologies have formed a series, including conventional beam-type oil pumping machines, special beam-type oil pumping machines, increased distance oil pumping machines, chain machines and beamless oil pumping machines. There are various strength levels of conventional solid oil rods, hollow oil rods, continuous oil rods, steel wire rope oil rods and glass steel oil rods. According to the requirements of exploitation and the different properties of fluids, fixed cylinder top fixed rod pumps, fixed cylinder bottom fixed rod pumps, movable cylinder bottom fixed rod pumps, whole cylinder tube pumps, combined tube pumps, soft seal pumps, heavy oil pumps, sand prevention and sticking oil pumps, gas prevention oil pumps, corrosion prevention oil pumps, double-acting pumps, bridge passing oil pumps, hollow pumps and other special pumps have been developed, forming a complete series of oil pumping pumps. However, as the oil reservoirs become more and more complex, the optimization of rod pumping system parameters needs to be urgently researched.

[0004] The Chinese patent document with the publication number CN109799105 reports a rod pumping system experimental device and method suitable for high gas-liquid ratio oil wells. The experimental device is composed of power supply and transmission equipment, gas-liquid supply equipment, data measurement and collection equipment, and experimental pipe column and gas prevention device. However, it mainly focuses on finding out the applicable gas-liquid ratio limits of various gas anchors and gas prevention pumps, as well as the limits of using various gas prevention pumps coupled with gas anchors, ultimately obtaining the applicable gas-liquid ratio limits of each gas anchor, gas prevention pump, and gas anchor coupled gas prevention pump, providing more effective guidance for high gas-liquid ratio oil well production, and cannot solve the judgment of the influence of pumping unit operation on reservoir seepage.

[0005] Currently, the lifting and production system for non-flowing wells mainly relies on experience. Due to the strong heterogeneity of reservoirs, large differences in oil quality, and complex oil-water relationship, it often leads to low lifting efficiency and high cost. SUMMARY

[0006] The present application provides a visual flow experiment device and experimental method for simulating the dynamics of conventional rod pumping, which overcomes the shortcomings of the prior art. It effectively solves the problems of inconvenient observation and research of the influence of pumping unit operation on reservoir seepage, low reservoir efficiency, and high production cost in the existing lifting and production system for non-flowing wells.

[0007] One of the technical solutions of the present application is achieved by the following measures: a visual flow experiment device for simulating the dynamics of conventional rod pumping, comprising a constant pressure water supply device, a micro displacement device, a measuring cylinder, and a vacuum suction device. The outlet of the constant pressure water supply device is fixedly connected with the inlet of the micro displacement device through a first water supply pipeline. The outlet of the micro displacement device is connected with the bottom inlet of the measuring cylinder through a third water supply pipeline. The top inlet of the vacuum suction device is fixedly connected with a vacuum hose, and the inlet end of the vacuum hose extends into the measuring cylinder.

[0008] The following is a further optimization or / and improvement of the above-mentioned one of the technical solutions:

[0009] The constant pressure water supply device includes a constant pressure water tank, a floating ball valve, and a water feeder. The water outlet of the water feeder is fixedly connected with the water inlet of the constant pressure water tank through a communication pipe. The outlet at the bottom of the constant pressure water tank is connected with the inlet of the micro displacement device through a first water supply pipeline. A floating ball valve is arranged in the constant pressure water tank. A first switch is fixedly installed on the communication pipe, and a second switch is fixedly installed on the first water supply pipeline.

[0010] The floating ball valve includes a small ball and a connecting rod. The small ball is connected with the water inlet of the water feeder through the connecting rod.

[0011] The micro-displacement device comprises a camera, a micro-experimental frame, a bottom light source, a glass etching model and a computer, the bottom light source and the glass etching model are arranged on a platform at the lower part of the micro-experimental frame, a support at the upper part of the micro-experimental frame is provided with the camera, the camera is electrically connected with the computer, a first water supply pipeline is fixedly communicated between the outlet at the bottom of the constant-pressure water tank and the inlet of the glass etching model, and a third water supply pipeline is fixedly communicated between the outlet of the glass etching model and the inlet at the bottom of the measuring cylinder.

[0012] The vacuum suction device comprises a vacuum bottle and a vacuum pump, a rubber plug capable of being sealed is arranged on the top bottle opening of the vacuum bottle, the outlet end of a vacuum hose extends into the vacuum bottle through the rubber plug, a vacuum table is arranged on the bottle opening of the vacuum bottle, a vacuum extraction pipeline is fixedly communicated between the bottle opening of the vacuum bottle and the inlet of the vacuum pump, the inlet end of the vacuum extraction pipeline extends into the vacuum bottle, an electromagnetic valve is fixedly installed on the vacuum extraction pipeline, a pressure sensor and an electromagnetic valve controller are arranged on the electromagnetic valve, and a vacuum control valve is fixedly installed on the vacuum extraction pipeline between the electromagnetic valve and the vacuum pump.

[0013] The visual flow experiment device for simulating the dynamic of conventional oil pumping with rods further comprises a first support and a second support, the constant-pressure water tank is arranged on the first support, and the measuring cylinder is fixedly installed on the second support.

[0014] The container wall of the measuring cylinder is marked with scale lines capable of reading the liquid level in the barrel, a valve group is arranged between the second support and the measuring cylinder, the inlet of the valve group is communicated with the measuring cylinder, and the outlet of the valve group is provided with a water tank.

[0015] The visual flow experiment device for simulating the dynamic of conventional oil pumping with rods further comprises a horizontal flow pump and an intermediate container, a second water supply pipeline is communicated between the outlet at the top of the intermediate container and the inlet of the glass etching model, the outlet of the glass etching model is communicated with a fourth water supply pipeline, the outlet of the fourth water supply pipeline extends into the water tank, and the intermediate container is provided with the horizontal flow pump at one end, which can send the fluid in the intermediate container to the second water supply pipeline.

[0016] The second technical solution of the present application is realized through the following measures: an experimental method for implementing a visual flow experiment device for simulating a conventional rod pumping dynamic, which is performed according to the following steps: first, saturate the glass etching model with formation water, and then saturate the glass etching model with experimental oil to form bound water; second, open the first switch, fill the constant-pressure water tank with water through the water filler, and then open the second switch, try to perform a water flooding process of the glass etching model, at the same time, start the vacuum pump to check the air tightness of the device, and then stop the vacuum pump; third, according to the required pressure of the experiment, adjust the switches in the valve group, adjust the height difference between the liquid levels in the constant-pressure water tank and the measuring cylinder, and ensure that the bottom hole flowing pressure is constant during the experiment; fourth, start the vacuum pump, adjust the electromagnetic valve controller and set the frequency of the electromagnetic valve controller, at the same time, adjust the vacuum control valve and set the vacuuming speed, and start the visual flow experiment for simulating the conventional rod pumping dynamic; fifth, observe the influence of the bottom hole pressure disturbance caused by the operation of the pumping unit on the reservoir seepage through the micro-displacement device, record the dynamic displacement process by using a computer, and arrange, calculate and analyze the experimental results to obtain the production system parameters under different reservoir conditions; sixth, change the set frequency of the electromagnetic valve controller and the vacuuming speed of the vacuum control valve, and repeat the operations of the fourth step and the fifth step; seventh, change the required pressure condition of the experiment, and repeat the operations of the fourth step, the fifth step and the sixth step, and optimize the best production system parameters under different reservoir conditions.

[0017] The present application has the advantages of simple structure, convenient operation, easy measurement and calculation of various pressures, and easy observation, recording and analysis of experimental phenomena, can simulate a conventional rod pumping system, study the dynamic changes of different production systems and the influence of the bottom hole pressure disturbance on the reservoir seepage, and optimize the best production system parameters under different reservoir conditions, thereby reducing the production cost and improving the reservoir recovery rate. BRIEF DESCRIPTION OF DRAWINGS

[0018] ATTACHED Figure 1 The present application has the advantages of simple structure, convenient operation, easy measurement and calculation of various pressures, and easy observation, recording and analysis of experimental phenomena, can simulate a conventional rod pumping system, study the dynamic changes of different production systems and the influence of the bottom hole pressure disturbance on the reservoir seepage, and optimize the best production system parameters under different reservoir conditions, thereby reducing the production cost and improving the reservoir recovery rate.

[0019] ATTACHED Figure 2 The present application has the advantages of simple structure, convenient operation, easy measurement and calculation of various pressures, and easy observation, recording and analysis of experimental phenomena, can simulate a conventional rod pumping system, study the dynamic changes of different production systems and the influence of the bottom hole pressure disturbance on the reservoir seepage, and optimize the best production system parameters under different reservoir conditions, thereby reducing the production cost and improving the reservoir recovery rate.

[0020] The codes in the drawings are as follows: 1 is a constant pressure water tank, 2 is a float ball valve, 3 is a water feeder, 4-1 is a first support, 4-2 is a second support, 5 is a first water supply pipeline, 6-1 is a first switch, 6-2 is a second switch, 7 is a camera, 8 is a micro experiment frame, 9 is a bottom light source, 10 is a glass etching model, 11 is a computer, 12 is a measuring cylinder, 13 is a vacuum hose, 14 is a valve group, 15 is a water tank, 16 is a vacuum bottle, 17 is a vacuum pump, 18 is a vacuum control valve, 19 is an electromagnetic valve, 20 is a pressure sensor, 21 is an electromagnetic valve controller, 22 is a vacuum gauge, 23 is a rubber plug, 24 is an intermediate container, 25 is a horizontal flow pump, 26 is a vacuum pumping pipeline, 27 is a second water supply pipeline, 28 is a third water supply pipeline, and 29 is a fourth water supply pipeline. DETAILED DESCRIPTION

[0021] The present application is not limited by the following examples, and the specific implementation can be determined according to the technical scheme of the present application and the actual situation.

[0022] The present application will be further described below in combination with examples:

[0023] Example 1: as shown in the accompanying Figure 1 The visual flow experiment device for simulating the dynamic of conventional rod pumping includes a constant pressure water supply device, a micro displacement device, a measuring cylinder 12 and a vacuum suction device, the outlet of the constant pressure water supply device is communicated with the inlet of the micro displacement device through a first water supply pipeline 5, the outlet of the micro displacement device is communicated with the bottom inlet of the measuring cylinder 12 through a third water supply pipeline 28, the top inlet of the vacuum suction device is fixedly communicated with a vacuum hose 13, and the inlet end of the vacuum hose 13 extends into the measuring cylinder 12.

[0024] The visual flow experiment device for simulating the dynamic of conventional rod pumping can study the bottom hole pressure disturbance caused by the operation of the conventional rod pumping unit, the influence on the reservoir seepage, and the optimal pumping unit parameters under different reservoir conditions, so as to reduce the production cost and improve the reservoir recovery rate; the visual flow experiment device for simulating the dynamic of conventional rod pumping can realize the visualization of the reservoir seepage simulation during the experiment, simulate different pumping unit stroke and frequency conditions, control the influence of the change amplitude of the bottom hole pressure on the seepage, and thus facilitate the observation and study of the influence of the operation of the pumping unit on the reservoir seepage. The visual flow experiment device for simulating the dynamic of conventional rod pumping establishes a connection between the development system and the lifting system, adjusts and improves the reservoir seepage development effect through the lifting system, avoids the disadvantages of adjusting the pumping unit parameters relying on experience, and provides a new idea and means for unconventional reservoirs with large differences in heavy oil products, strong formation heterogeneity and complex oil-water relationship.

[0025] Example 2: as shown in the accompanying Figure 1As shown, as an optimization of the above embodiment, the constant pressure water supply device includes a constant pressure water tank 1, a float valve 2, and a water dispenser 3. A connecting pipe is fixedly connected between the outlet of the water dispenser 3 and the inlet of the constant pressure water tank 1. A first water supply pipeline 5 is connected between the bottom outlet of the constant pressure water tank 1 and the inlet of the micro displacement device. The float valve 2 is installed inside the constant pressure water tank 1. A first switch 6-1 is fixedly installed on the connecting pipe. A second switch 6-2 is fixedly installed on the first water supply pipeline 5.

[0026] Example 3: As shown in the attached document Figure 1 As shown, as an optimization of the above embodiment, the float valve 2 includes a small ball and a connecting rod, and the small ball is connected to the water inlet of the water dispenser 3 through the connecting rod.

[0027] As needed, the float valve 2 and the water dispenser 3 simultaneously control the addition of water to the constant pressure water tank 1. After a certain amount of water is added to the constant pressure water tank 1, the pressure in the constant pressure water tank 1 is kept constant.

[0028] The main structure of the float valve 2 consists of a small ball that floats on the water surface. This ball is connected to the water inlet of the water dispenser 3 via a connecting rod, controlling the opening and closing of the inlet. When the ball and connecting rod are horizontal, the inlet remains closed. When the ball falls as the liquid level in the constant pressure water tank 1 drops, the ball and connecting rod deviate from the horizontal direction, and the inlet opens to add water to the constant pressure water tank 1 until the liquid level returns to its original height, thus ensuring that the pressure in the constant pressure water tank 1 remains constant. The liquid level in the constant pressure water tank 1 is relatively easy to measure.

[0029] Example 4: As shown in the appendix Figure 1 As shown, as an optimization of the above embodiment, the micro displacement device includes a camera 7, a micro experimental frame 8, a bottom light source 9, a glass etching model 10, and a computer 11. The bottom light source 9 and the glass etching model 10 are placed on the platform at the bottom of the micro experimental frame 8. The camera 7 is mounted on the bracket at the top of the micro experimental frame 8. The camera 7 is electrically connected to the computer 11. A first water supply line 5 is connected between the bottom outlet of the constant pressure water tank 1 and the inlet of the glass etching model 10. A third water supply line 28 is connected between the outlet of the glass etching model 10 and the bottom inlet of the measuring cylinder 12.

[0030] As needed, the seepage process in an oil reservoir can be simulated by connecting a micro-displacement device to a constant-pressure water supply device. Specifically, a camera 7, in conjunction with a bottom light source 9, captures the seepage displacement process of the glass-etched model 10, and the process is observed and recorded by a computer 11.

[0031] Example 5: As shown in the attached document Figure 1As shown in the above embodiment, as an optimization of the above embodiment, the vacuum suction device comprises a vacuum bottle 16 and a vacuum pump 17, a sealable rubber plug 23 is arranged on the top bottle mouth of the vacuum bottle 16, the outlet end of the vacuum hose 13 extends into the vacuum bottle 16 through the rubber plug 23, a vacuum table 22 is arranged on the bottle mouth of the vacuum bottle 16, a vacuum pipeline 26 is fixedly communicated between the bottle mouth of the vacuum bottle 16 and the inlet of the vacuum pump 17, the inlet end of the vacuum pipeline 26 extends into the vacuum bottle 16, an electromagnetic valve 19 is fixedly installed on the vacuum pipeline 26 between the electromagnetic valve 19 and the vacuum pump 17, a pressure sensor 20 and an electromagnetic valve controller 21 are arranged on the electromagnetic valve 19, and a vacuum control valve 18 is fixedly installed on the vacuum pipeline 26 between the electromagnetic valve 19 and the vacuum pump 17.

[0032] According to needs, the bottle mouth of the vacuum bottle 16 is sealed with the rubber plug 23 to ensure the air tightness of the vacuum suction device, and the vacuum table 22 connected to the bottle mouth can measure the pressure of vacuumization.

[0033] The electromagnetic valve 19 is connected with the pressure sensor 20 and the electromagnetic valve controller 21, the pressure sensor 20 can measure the pressure on both sides of the electromagnetic valve 19, and the electromagnetic valve controller 21 controls the frequency of opening and closing of the electromagnetic valve 19, for example, controls the electromagnetic valve 19 to be opened for 20 s and closed for 20 s, and the frequency of the electromagnetic valve 19 is 0.025 Hz, which can simulate different strokes and strokes per minute of a conventional rod pumping unit and control the change amplitude of the bottom hole pressure. When the electromagnetic valve 19 is opened, the vacuum pump 17 starts to work, a negative pressure is formed in the vacuum bottle 16, and the liquid in the measuring cylinder 12 is sucked into the vacuum bottle 16 through the vacuum hose 13. When the vacuum electromagnetic valve 19 is closed, the vacuum pump 17 stops working, the pressure in the vacuum bottle 16 remains unchanged, and no liquid is discharged into the vacuum bottle 16. This process can simulate the upstroke and downstroke of the rod pump.

[0034] Embodiment 6: as shown in the accompanying Figure 1 As an optimization of the above embodiment, the visual flow experiment device for simulating the dynamics of the conventional rod pumping unit further comprises a first support 4-1 and a second support 4-2, and the constant-pressure water tank 1 is arranged on the first support 4-1 and the measuring cylinder 12 is fixedly installed on the second support 4-2.

[0035] Embodiment 7: as shown in the accompanying Figure 1 As an optimization of the above embodiment, a scale line capable of reading the liquid level height in the container is marked on the container wall of the measuring cylinder 12, a valve group 14 is arranged between the second support 4-2 and the measuring cylinder 12, the inlet of the valve group 14 is communicated with the measuring cylinder 12, and a water tank 15 is arranged at the outlet of the valve group 14.

[0036] According to the need, the measuring cylinder 12 is connected behind the micro-displacement device, the dynamic change of multiphase flow in the wellbore can be simulated, a vacuum hose 13 is placed in the measuring cylinder 12 to simulate the sucker rod, and the vacuum suction device can provide the power of suction, and the measuring cylinder 12 can simulate the sucker rod pumping process.

[0037] The measuring cylinder 12 is a transparent pressure-resistant glass device fixed on the first support 4-2, the container wall of the measuring cylinder 12 is marked with scale lines, the liquid level in the barrel can be read, when the liquid level in the constant-pressure water tank 1 is known, the difference between the liquid level in the measuring cylinder 12 can be calculated to calculate the seepage pressure difference and production pressure difference in the micro-displacement process. The valve group 14 is installed at different heights of the measuring cylinder 12, and the valve of the valve group 14 at different heights is opened to control the different liquid levels in the measuring cylinder 12, simulate the constant bottom-hole flowing pressure production in different oil production processes, and the liquid discharged from the valve group 14 flows into the water tank 15.

[0038] Embodiment 8: as shown in the accompanying Figure 2 As an optimization of the above-mentioned embodiments, the visual flow experiment device for simulating the conventional sucker rod pumping process further comprises a horizontal flow pump 25 and an intermediate container 24, the second water supply pipeline 27 is communicated between the top outlet of the intermediate container 24 and the inlet of the glass etching model 10, the outlet of the glass etching model 10 is communicated with the fourth water supply pipeline 29, the outlet of the fourth water supply pipeline 29 extends into the water tank 15, and the intermediate container 24 is provided with the horizontal flow pump 25 at one end, which can send the fluid in the intermediate container 24 to the second water supply pipeline 27.

[0039] Example 9: The experiment method of the visual flow experiment device for simulating the conventional sucker rod pumping dynamic is carried out according to the following steps: first, the glass etching model 10 is filled with saturated formation water, and then saturated experimental oil is filled to form bound water; second, the first switch 6-1 is opened, the constant pressure water tank 1 is filled with water through the water feeder 3, then the second switch 6-2 is opened, the water drive process of the glass etching model 10 is tried to be carried out, at the same time, the vacuum pump 17 is started to check the air tightness of the device, then the vacuum pump 17 is stopped; third, according to the required pressure of the experiment, the switch in the valve group 14 is adjusted, the height difference between the liquid level in the constant pressure water tank 1 and the measuring cylinder 12 is adjusted to ensure that the bottom hole flowing pressure is constant during the experiment; fourth, the vacuum pump 17 is started, the electromagnetic valve controller 21 is adjusted and the frequency of the electromagnetic valve controller 21 is set, at the same time, the vacuum control valve 18 is adjusted and the vacuumizing speed is set, and the visual flow experiment for simulating the conventional sucker rod pumping dynamic is started; fifth, the influence of the bottom hole pressure disturbance caused by the pumping unit operation on the reservoir seepage is observed through the micro displacement device, the dynamic displacement process is recorded by the computer 11, the experimental results are arranged, calculated and analyzed, and the production system parameters under different reservoir conditions are obtained; sixth, the setting frequency of the electromagnetic valve controller 21 and the vacuumizing speed of the vacuum control valve 18 are changed, and the operations of the fourth step and the fifth step are repeated; seventh, the required pressure condition of the experiment is changed, and the operations of the fourth step, the fifth step and the sixth step are repeated, and the optimal production system parameters under different reservoir conditions are optimized.

[0040] The visual flow experiment device for simulating the conventional sucker rod pumping dynamic is used to carry out the saturation experiment and the water drive experiment of the micro glass etching model.

[0041] Example 10: The saturation experiment of the micro glass etching model 10 is carried out by the visual flow experiment device for simulating the conventional sucker rod pumping dynamic, first, the experimental device is connected according to the embodiment 1, the intermediate container 24 is filled with formation water, the glass etching model 10 is saturated with formation water by starting the horizontal flow pump 25, then the intermediate container 24 is replaced with oil, and the saturation experiment of the experimental oil is started to form bound water. Figure 2

[0042] Example 11: The water drive experiment of the micro glass etching model 10 is carried out by the visual flow experiment device for simulating the conventional sucker rod pumping dynamic, which is different from the embodiment 10 in that: after the glass etching model 10 is saturated with experimental oil, the intermediate container 24 is replaced with water, the horizontal flow pump 25 is opened, and the water drive experiment is started; during the experiment, the camera 7 and the bottom light source 9 are opened, the water drive process is observed through the computer 11, the seepage phenomenon in the glass etching model 10 is recorded, the experimental results are compared and analyzed, and the optimal production system parameters under different reservoir conditions are optimized.

[0043] ​Example 12: The visual flow experiment device for simulating the conventional rod pumping oil dynamic by using the present application, the water drive recovery is calculated: the image recognition, calculation and statistical function of the image processing software (Imagepro-plus6.0) is used to calculate the images before and after water drive of the glass etching model 10, the software can recognize according to the color of the image, the remaining oil pixel is counted, and the area of the remaining oil is calculated. The water drive recovery calculation formula is:

[0044]

[0045] Wherein: The recovery rate at the moment, ;

[0046] The water drive The remaining oil area of the glass etching model 10 at the moment, ;

[0047] The area of the saturated oil of the glass etching model 10, .

[0048] In summary, the present application has the advantages of simple structure, convenient operation, easy measurement and calculation of various pressures, and the experimental phenomena are easy to observe, record and analyze. The present application can simulate the conventional rod pumping system, study the dynamic changes of different production systems and the influence of the disturbance of the bottom hole pressure on the reservoir seepage, and optimize the best production system parameters under different reservoir conditions, so as to reduce the production cost and improve the reservoir recovery.

[0049] The above technical features constitute the embodiments of the present application, which have strong adaptability and implementation effect. The unnecessary technical features can be added or reduced according to actual needs to meet the needs of different situations.

Claims

1. A visual flow experiment device simulating the dynamics of a conventional sucker-rod pumping, characterized in that The constant pressure water supply device, the micro displacement device, the measuring cylinder and the vacuum suction device, the outlet of the constant pressure water supply device is communicated with the inlet of the micro displacement device through the first water supply pipeline, the outlet of the micro displacement device is communicated with the bottom inlet of the measuring cylinder through the third water supply pipeline, the top inlet of the vacuum suction device is fixedly communicated with the vacuum hose, the inlet end of the vacuum hose extends into the measuring cylinder, the constant pressure water supply device comprises a constant pressure water tank, a floating ball valve and a water feeder, the outlet of the water feeder is fixedly communicated with the inlet of the constant pressure water tank through a communication pipe, the bottom outlet of the constant pressure water tank is communicated with the inlet of the micro displacement device through the first water supply pipeline, the floating ball valve is arranged in the constant pressure water tank, a first switch is fixedly installed on the communication pipe, and a second switch is fixedly installed on the first water supply pipeline, the micro displacement device comprises a camera, a micro experiment frame, a bottom light source, a glass etching model and a computer, the bottom light source and the glass etching model are arranged on the platform at the lower part of the micro experiment frame, the camera is arranged on the support at the upper part of the micro experiment frame, the camera is electrically connected with the computer, the bottom outlet of the constant pressure water tank is communicated with the inlet of the glass etching model through the first water supply pipeline, and the outlet of the glass etching model is communicated with the bottom inlet of the measuring cylinder through the third water supply pipeline, the vacuum suction device comprises a vacuum bottle and a vacuum pump, a sealable rubber plug is arranged on the top bottle mouth of the vacuum bottle, the outlet end of the vacuum hose extends into the vacuum bottle through the rubber plug, a vacuum gauge is arranged on the bottle mouth of the vacuum bottle, the bottle mouth of the vacuum bottle is fixedly communicated with the inlet of the vacuum pump through a vacuum pipeline, the inlet end of the vacuum pipeline extends into the vacuum bottle, an electromagnetic valve is fixedly installed on the vacuum pipeline, a pressure sensor and an electromagnetic valve controller are arranged on the electromagnetic valve, and a vacuum control valve is fixedly installed on the vacuum pipeline between the electromagnetic valve and the vacuum pump.

2. The visualized flow experiment device simulating the dynamics of a conventional sucker-rod pumped oil well according to claim 1, characterized in that The floating ball valve comprises a ball and a connecting rod, and the ball is connected with the water inlet of the water feeder through the connecting rod.

3. The visualized flow experiment device simulating the dynamics of a conventional sucker-rod pumped oil well according to claim 1 or 2, characterized in that The first support and the second support are further included, the constant pressure water tank is arranged on the first support, and the measuring cylinder is fixedly installed on the second support.

4. The visualized flow experiment device simulating the dynamics of conventional sucker-rod pumping according to claim 3, characterized in that A liquid level scale line capable of reading the liquid level in the barrel is marked on the container wall of the measuring cylinder, a valve group is arranged between the second support and the measuring cylinder, the inlet of the valve group is communicated with the measuring cylinder, and a water tank is arranged at the outlet of the valve group.

5. The visualized flow experiment device simulating the dynamics of conventional sucker-rod pumping according to claim 4, characterized in that The horizontal flow pump and the intermediate container are further included, the top outlet of the intermediate container is communicated with the inlet of the glass etching model through the second water supply pipeline, the outlet of the glass etching model is communicated with the fourth water supply pipeline, the outlet of the fourth water supply pipeline extends into the water tank, and the intermediate container is provided with the horizontal flow pump at one end, which can send the fluid in the intermediate container to the second water supply pipeline.

6. An experimental method for implementing a visual flow experiment device simulating a dynamic of a conventional sucker-rod pumping, according to any one of claims 1 to 5, characterized in that The following steps are performed: first, the glass etching model is filled with saturated formation water, then saturated experimental oil is filled, and bound water is formed; Secondly, open the first switch, fill the constant pressure water tank with water through the water feeder, then open the second switch, try to carry out the water displacement process of the glass etching model, start the vacuum pump to check the air tightness of the device, and then stop the vacuum pump; Thirdly, according to the required pressure of the experiment, the switches in the valve group are adjusted, the height difference between the liquid levels in the constant pressure water tank and the measuring cylinder is adjusted, and the bottom hole flow pressure in the experimental process is ensured to be constant; Fourth step, start the vacuum pump, adjust the electromagnetic valve controller and set the frequency of the electromagnetic valve controller, while adjusting the vacuum control valve, set the vacuum speed, start the visual flow experiment simulation of the conventional rod pumping dynamic; Fifth step, through the micro-displacement device, observe the influence of the bottom hole pressure disturbance caused by the pumping unit operation on the reservoir seepage, record the dynamic displacement process by computer, organize, calculate and analyze the experimental results, and obtain the production system parameters under different reservoir conditions; Sixth step, change the setting frequency of the electromagnetic valve controller and the vacuum speed of the vacuum control valve, repeat the fourth and fifth steps; Seventh step, change the required pressure conditions of the experiment, repeat the fourth, fifth and sixth steps, and optimize the best production system parameters under different reservoir conditions.

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