Fracture-vug type reservoir displacement and plugging performance evaluation integrated equipment

Abstract

The utility model relates to the technical field of oil development, in particular to displacement and plugging performance evaluation integrated equipment for a fracture-vug type reservoir. Comprising a driving pump, a container assembly and an experiment assembly, the experiment assembly comprises a fracture-cavity model, a pressure return assembly and an oil-water metering assembly, the container assembly is provided with an input end and an output end, and the fracture-cavity model is also provided with an input end and an output end; the input end of the container assembly is communicated with the driving pump, the output end of the container assembly is communicated with the input end of the fracture-vug model, the output end of the fracture-vug model is communicated with the oil-water metering assembly, and a pressure return assembly is arranged on a pipeline where the fracture-vug model is communicated with the oil-water metering assembly in a communicated mode; the fracture-vug type reservoir displacement simulation experiment can be carried out, the plugging performance evaluation of the fracture-vug type plugging agent can also be carried out, and multifunctionality is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil development, in particular to an integrated device for evaluating the displacement and plugging performance of fracture-cavity reservoirs. Background Art

[0002] Fracture-vuggy oil reservoirs are mainly composed of caves, dissolution pores and fracture systems formed by karst and tectonic movements. The caves are discretely distributed and are the main storage space, while the fractures are the main flow channels. During their development, it is often necessary to inject plugging agents to adjust the flow channels, that is, to use plugging agents to plug the fractures or the water flow channels in the fractures. The plugging performance of the plugging agent on the fractures is the focus of the development of fracture-vuggy plugging agents, and the plugging performance of the plugging agent is usually evaluated through experiments.

[0003] At the same time, due to the unclear understanding of the fluid flow laws of fracture-vuggy reservoirs, especially the oil displacement mechanism in caves, the current development effect of this type of reservoir is very unsatisfactory. Therefore, indoor core displacement experiments are the main means to understand and study the seepage laws of fracture-vuggy reservoirs. This type of experiment can reflect the flow laws of fluids in reservoirs, thereby providing a scientific basis for predicting the production laws of single wells, formulating development plans, and improving recovery rates.

[0004] Prior art CN105178927B discloses a displacement simulation experimental device and system, the experimental device comprising: a bottom water device, a first pressure measuring device, a second pressure measuring device, a gas source, a constant flow pump, a gas flow controller, a simulated oil container, a simulated formation water container, and a metering device; wherein the bottom water outlet of the fracture-hole physical model is connected to the bottom water device and the second pressure measuring device; the constant flow pump is connected to the inlet of the simulated oil container and the inlet of the simulated formation water container, and the outlet of the simulated oil container and the outlet of the simulated formation water container are connected to the injection port of the fracture-hole physical model; the gas source is connected to one end of the gas flow controller, and the other end of the gas flow controller is connected to the injection port of the fracture-hole physical model; the injection port of the fracture-hole physical model is connected to the first pressure measuring device; and the production outlet of the fracture-hole physical model is connected to the metering device.

[0005] Prior art CN106896041A discloses a device for evaluating the water plugging performance of a granular water plugging agent, comprising: a displacement pump, an injection pipeline, a pressure collector, a tubular sand filling model, a cylinder, an upper cover, a piston, a screw plug, and an agitator. An injection through hole is provided on the top of the upper cover to connect the injection pipeline; the pressure collector is connected to the injection pipeline to collect the injection pressure.

[0006] The experimental devices in the prior art have relatively simple functions, and it is impossible to use the same device to achieve reservoir displacement and plugging performance evaluation. At the same time, the devices for evaluating the performance of granular plugging agents in the prior art use sand-filled pipes to simulate plugging performance evaluation, and are unable to simulate the evaluation of fracture-type reservoir plugging or oil displacement performance.

[0007] Therefore, there is an urgent need to provide an integrated device for fracture-cavity reservoir displacement and plugging performance evaluation. Compared with the existing technology, the same device can realize both the displacement simulation of fracture-cavity oil reservoirs and the plugging performance evaluation of fracture-cavity oil reservoirs. Utility Model Content

[0008] The utility model solves the technical problems existing in the prior art and provides an integrated device for evaluating the displacement and plugging performance of a fracture-cavity reservoir.

[0009] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0010] A device for evaluating the displacement and plugging performance of a fracture-hole reservoir comprises a driving pump, a container assembly and an experimental assembly, wherein the experimental assembly comprises a fracture-hole model, a back-pressure assembly and an oil-water metering assembly, the container assembly is provided with an input end and an output end, and the fracture-hole model is also provided with an input end and an output end; the input end of the container assembly is connected to the driving pump, the output end of the container assembly is connected to the input end of the fracture-hole model, the output end of the fracture-hole model is connected to the oil-water metering assembly, and a back-pressure assembly is arranged on the pipeline connecting the fracture-hole model and the oil-water metering assembly.

[0011] Furthermore, the container assembly includes an intermediate stirring container and an intermediate container, the upper ends of the intermediate stirring container and the intermediate container are set as input ends, the lower ends of the intermediate stirring container and the side walls of the intermediate container are set as output ends, the input ends of the intermediate stirring container and the intermediate container are connected to the driving pump through a first valve, and the output ends of the intermediate stirring container and the intermediate container are connected to the slit model through a second valve.

[0012] Furthermore, the intermediate stirring container includes a body and a stirring component, the body is a hollow structure, the upper end of the body is an input end, the lower end of the body side wall is an output end, and the stirring component is penetrated through the lower wall of the body.

[0013] Furthermore, the stirring assembly includes a motor, a stirring shaft and a stirring blade, the motor is arranged below the main body, the motor output end is fixedly connected to the stirring shaft, the stirring shaft is arranged through the lower wall of the main body, and the end of the stirring shaft extending into the interior of the main body is fixedly connected to the stirring blade.

[0014] Furthermore, the stirring blade is arranged corresponding to the position of the output end of the body.

[0015] Furthermore, the intermediate stirring container is provided in plurality.

[0016] Furthermore, the output ends of the plurality of intermediate stirring containers are provided with valves.

[0017] Furthermore, the driving pump is a constant speed and constant pressure pump.

[0018] Furthermore, the experimental components are provided in plurality, and the plurality of the experimental components are arranged in parallel, and the input ends of the plurality of the crack models are merged into a pipeline connected to the container component.

[0019] Furthermore, the back-pressure assembly includes a back-pressure valve, a buffer tank and a back-pressure pump. The back-pressure valve is provided with three interfaces, the first interface is connected to the output end of the fracture model, the second interface is connected to the oil-water metering assembly, and the third interface is connected to the buffer tank. The end of the buffer tank away from the back-pressure valve is connected to the back-pressure pump.

[0020] Furthermore, the buffer tanks arranged inside the plurality of experimental components are connected to the same back pressure pump.

[0021] Furthermore, pressure transmitters are provided on the pipeline that merges the input ends of the plurality of the fracture models, on the pipeline that connects the fracture model with the back pressure valve, and on the buffer tank.

[0022] Furthermore, the container assembly, the slit model, the pressure transmitter arranged on the pipeline where the input ends of the plurality of slit models converge into one, and the pressure transmitter arranged on the pipeline connecting the slit model and the back pressure valve are all arranged inside the first constant temperature box.

[0023] Furthermore, the oil-water metering assembly and the back-pressure valve are arranged inside the second thermostatic box.

[0024] Furthermore, the oil-water metering component includes a first vertical pipe, a second vertical pipe, a third vertical pipe, a plurality of transverse pipes, an oil pump and a water pump. The upper ends and lower ends of the first vertical pipe, the second vertical pipe and the third vertical pipe are connected through the transverse pipe, and the middle of the first vertical pipe and the second vertical pipe is also connected through the transverse pipe. The first vertical pipe is connected to the oil pump at a position corresponding to the middle connecting transverse pipe, and the lower end of the first vertical pipe is connected to the water pump.

[0025] Furthermore, a water pump electrode assembly is provided inside the second vertical pipe, and an oil pump electrode assembly is provided inside the third vertical pipe. The water pump electrode assembly is used to control the start and stop of the water pump, and the oil pump electrode assembly is used to control the start and stop of the oil pump.

[0026] Furthermore, the water pump electrode assembly includes a first water pump electrode and a second water pump electrode, the first water pump electrode is penetrated through the upper wall of the second vertical pipe, the second water pump electrode is penetrated through the lower wall of the second vertical pipe, and the lower end of the first water pump electrode is located above the upper end of the second water pump electrode.

[0027] Furthermore, the oil pump electrode assembly includes a first oil pump electrode, a second oil pump electrode and a third oil pump electrode, the first oil pump electrode and the second oil pump electrode are penetrated through the upper wall of the third vertical pipe, the third oil pump electrode is penetrated through the lower wall of the third vertical pipe, the first oil pump electrode and the second oil pump electrode are arranged in parallel, the lower end of the first oil pump electrode is located above the lower end of the second oil pump electrode, and the lower end of the second oil pump electrode is located above the upper end of the third oil pump electrode.

[0028] Furthermore, the lower end of the first water pump electrode is located below the upper end of the third oil pump electrode.

[0029] Furthermore, the fracture-hole model is connected with an annular pressure tracking pump.

[0030] Compared with the prior art, the beneficial effects of the utility model are:

[0031] (1) The utility model is multifunctional, by providing a driving pump, a container assembly, a fracture-cavity model, an oil-water metering assembly and a back pressure assembly, so that it can not only conduct fracture-cavity reservoir displacement simulation experiments, but also conduct fracture-cavity plugging agent plugging performance evaluation.

[0032] (2) The utility model provides an intermediate stirring container and a stirring assembly, so that the granular plugging agent is injected under stirring conditions, thereby preventing the granular plugging agent from settling, and realizing the evaluation of the plugging performance of the granular plugging agent.

[0033] (3) The fracture-hole model of the utility model is made of artificial steel fracture-hole model instead of cement casting, so that the fracture-hole model can be reused and is resistant to high pressure and high temperature; an oil-water metering pipe is installed to achieve oil-water separation during displacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0035] Figure 2 It is a structural schematic diagram of the intermediate stirring container of the utility model.

[0036] Figure 3 It is a structural schematic diagram of the oil-water metering component of the utility model.

[0037] Figure 4 It is a cross-sectional view of the crack hole model of the utility model.

[0038] Description of reference numerals:

[0039] 1. Constant speed and constant pressure pump; 2. Six-way valve; 3. Intermediate container; 4. Intermediate stirring container; 41. Motor; 42. Stirring shaft; 43. Stirring blade; 44. Main body; 5. Crack model; 51. Crack; 6. Back pressure valve; 7. Pressure transmitter; 8. Oil and water metering assembly; 81. First vertical pipe; 82. Second vertical pipe; 83. Third vertical pipe; 84. Horizontal pipe; 85. First oil pump electrode; 86. Second oil pump electrode; 87. Third oil pump electrode; 88. First water pump electrode; 89. Second water pump electrode; 810. Water pump; 811. Oil pump; 9. Buffer tank; 10. Back pressure pump; 11. Annular pressure tracking pump; 12. First constant temperature box; 13. Second constant temperature box; 14. Three-way valve. DETAILED DESCRIPTION

[0040] The technical solution of the utility model will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the utility model. It should be noted that the orientation or position relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", etc. is based on the orientation or position relationship shown in the accompanying drawings. It is only for the convenience of describing the utility model and simplifying the description. It 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 utility model.

[0041] like Figure 1 As shown, the utility model provides an integrated device for evaluating the displacement and plugging performance of a fracture-cavity reservoir, including a driving pump, a container component and an experimental component. The input end of the container component is connected to the driving pump, and the output end of the container component is connected to the output end of the experimental component. The experimental component includes a fracture-cavity model 5, a back pressure component and an oil-water metering component 8. The input end of the fracture-cavity model 5 is connected to the output end of the container component, and the output end of the fracture-cavity model 5 is connected to the oil-water metering component 8. The back pressure component is connected to the pipeline connecting the output end of the fracture-cavity model 5 and the oil-water metering component 8; the fracture-cavity model 5 is as shown in FIG. Figure 4 As shown, the crack model 5 is cylindrical, and a crack 51 is provided inside the crack model 5. The width of the crack 51 is 1-2 mm, one end of the crack 51 is the input end of the crack model 5, and the other end of the crack 51 is the output end of the crack model 5. The material of the crack model 5 is steel, which can withstand high temperature and high pressure.

[0042] The container assembly includes a plurality of intermediate stirring containers 4 and intermediate containers 3, such as Figure 2As shown, the intermediate stirring container 4 includes a body 44 and a stirring assembly. The body 44 is a hollow structure. The upper end of the body 44 is an input end, and the lower end of the side wall of the body 44 is an output end. The stirring assembly is arranged on the lower wall of the body 44. The stirring assembly includes a motor 41, a stirring shaft 42 and a stirring blade 43. The motor 41 is arranged below the body 44. The output end of the motor 41 is fixedly connected to the stirring shaft 42. The stirring shaft 42 passes through the lower wall of the body 44. The stirring shaft 42 is coaxially arranged with the body 44. One end of the stirring shaft 42 extending into the interior of the body 44 is fixedly connected to the stirring blade 43. The output end of the body 44 is arranged corresponding to the position of the stirring blade 43. The difference between the intermediate container 3 and the intermediate stirring container 4 is that the stirring assembly is not arranged. The upper end of the intermediate container 3 is the input end, and the lower end of the side wall is the output end.

[0043] The input ends of the intermediate container 3 and the intermediate stirring container 4 are connected to the driving pump through the first valve, and the driving pump adopts a constant speed constant pressure pump 1; the output ends of the intermediate container 3 and the intermediate stirring container 4 are connected to the slit hole model 5 through the second valve; the output end of the intermediate stirring container 4 is provided with a valve. The maximum capacity of the intermediate container 3 and the intermediate stirring container 4 is 2L; the maximum flow rate of the constant speed constant pressure pump 1 is 100ml / min and the maximum pressure is 30Mpa; the first valve is a six-way valve 2, and the six-way valve 2 has two spare interfaces. When the connected interface is blocked by mistake, it can be transferred to the spare interface for use, and the second valve is a three-way valve 14.

[0044] There are multiple experimental components, and the multiple experimental components are arranged in parallel. The input end of the fracture model 5 is merged into a pipeline connected to the three-way valve 14. The input end of each fracture model 5 is provided with a valve. The multiple fracture models 5 are connected to an annular pressure tracking pump 11, and the multiple fracture models 5 are connected to the same annular pressure tracking pump 11; the output end of each fracture model 5 is connected to an oil-water metering component 8, and the oil-water metering component 8 connected to the fracture model 5 below is not in Figure 1 , but in reality, the lower fracture model 5 is connected to the oil-water metering component 8 just like the fracture model 5 arranged above.

[0045] The back pressure component includes a back pressure valve 6, a buffer tank 9 and a back pressure pump 10. The back pressure valve 6 is connected in series to the pipeline connecting the fracture model 5 and the oil-water metering component 8. The back pressure valve 6 is provided with three interfaces. The first interface is connected to the output end of the fracture model 5, the second interface is connected to the oil-water metering component 8, and the third interface is connected to the input end of the buffer tank 9. The output end of the buffer tank 9 is connected to the back pressure pump 10. The output ends of the buffer tanks 9 provided in multiple experimental components are connected to the same back pressure pump 10.

[0046] Pressure transmitters 7 are connected to the pipeline where the input end of the fracture model 5 is merged into one, the pipeline where the output end of the fracture model 5 is connected to the back pressure valve 6, the input end of the buffer tank 9, and the ring pressure tracking pump 11. Except for the pressure transmitter 7 of the ring pressure tracking pump 11 whose maximum pressure is 50Mpa, the maximum pressure of the other pressure transmitters 7 is 40Mpa; the pressure transmitter 7 is used to measure liquid pressure and detect pipeline pressure data.

[0047] like Figure 3 As shown, the oil-water metering assembly 8 includes a first vertical pipe 81, a second vertical pipe 82, a third vertical pipe 83, a plurality of transverse pipes 84, an electrode assembly of an oil pump 811, an electrode assembly of a water pump 810, an oil pump 811 and a water pump 810. The first vertical pipe 81, the second vertical pipe 82 and the third vertical pipe 83 are arranged in parallel and spaced apart. The upper and lower ends of the first vertical pipe 81 and the second vertical pipe 82, and the upper and lower ends of the second vertical pipe 82 and the third vertical pipe 83 are connected through the transverse pipe 84. The axis of the transverse pipe 84 connecting the upper ends of the first vertical pipe 81 and the second vertical pipe 82 is connected to the axis of the second vertical pipe 82 and the third vertical pipe 83. The axes of the horizontal pipe 84 at the upper end are arranged flush with each other, the axes of the horizontal pipe 84 connecting the lower ends of the first vertical pipe 81 and the second vertical pipe 82 and the axes of the horizontal pipe 84 connecting the lower ends of the second vertical pipe 82 and the third vertical pipe 83 are also arranged flush with each other, and the upper ends of the first vertical pipe 81, the second vertical pipe 82 and the third vertical pipe 83 are all extended out to the same distance from the upper horizontal pipe 84, and the lower ends of the first vertical pipe 81, the second vertical pipe 82 and the third vertical pipe 83 are also extended out to the same distance from the lower horizontal pipe 84, and the middle position between the first vertical pipe 81 and the second vertical pipe 82 is connected through the horizontal pipe 84.

[0048] An oil pump 811 is arranged on the side wall of the first vertical pipe 81, and the position where the oil pump 811 is connected to the first vertical pipe 81 corresponds to the position of the horizontal pipe 84 connected in the middle of the first vertical pipe 81; the lower end of the first vertical pipe 81 is connected to the water pump 810; a water pump 810 electrode assembly is arranged inside the second vertical pipe 82, and an oil pump 811 electrode assembly is arranged inside the third vertical pipe 83. The water pump 810 electrode assembly is used to control the start and stop of the water pump 810, and the oil pump 811 electrode assembly is used to control the start and stop of the oil pump 811. The water pump 810 electrode assembly, the oil pump 811 electrode assembly, the oil pump 811, and the water pump 810 are electrically connected to a controller, and the controller is used to receive a signal from the water pump 810 electrode assembly to start the water pump 810 and stop the water pump 810, and then start or stop the water pump 810 according to the corresponding signal. The controller is also used to receive a signal from the oil pump 811 electrode assembly to start the oil pump 811 and stop the oil pump 811, and then start or stop the oil pump 811 according to the corresponding signal.

[0049] The water pump 810 electrode assembly includes a first water pump 810 electrode 88 and a second water pump 810 electrode 89. The first water pump 810 electrode 88 is disposed at the upper end of the second vertical pipe 82, a portion of the first water pump 810 electrode 88 is located outside the second vertical pipe 82, and another portion is located inside the second vertical pipe 82. The second water pump 810 electrode 89 is disposed at the lower end of the second vertical pipe 82, a portion of the second water pump 810 electrode 89 is located inside the second vertical pipe 82, and another portion is located outside the second vertical pipe 82. The lower end of the first water pump 810 electrode 88 is located above the upper end of the second water pump 810 electrode 89. The connection between the first water pump 810 electrode 88 and the second water pump 810 electrode 89 is a signal for the water pump 810 electrode assembly to start the water pump 810, and the disconnection between the first water pump 810 electrode 88 and the second water pump 810 electrode 89 is a signal for the water pump 810 electrode assembly to stop the water pump 810.

[0050] The oil pump 811 electrode assembly includes a first oil pump 811 electrode 85, a second oil pump 811 electrode 86 and a third oil pump 811 electrode 87. The first oil pump 811 electrode 85 and the second oil pump 811 electrode 86 are both arranged through the upper wall of the third vertical pipe 83. The first oil pump 811 electrode 85 and the second oil pump 811 electrode 86 are arranged in parallel. A part of the first oil pump 811 electrode 85 and the second oil pump 811 electrode 86 is outside the third vertical pipe 83, and the other part is located inside the third vertical pipe 83. The third oil pump 811 electrode 87 is arranged through the lower wall of the third vertical pipe 83. A part of the third oil pump 811 electrode 87 is located inside the third vertical pipe 83, and the other part is located outside the third vertical pipe 83. The lower end of the first oil pump 811 electrode 85 is located above the lower end of the second oil pump 811 electrode 86, and the lower end of the second oil pump 811 electrode 86 is located above the upper end of the third oil pump 811 electrode 87. The first oil pump 811 electrode 85 and the second oil pump 811 electrode 86 are connected as a signal for the oil pump 811 electrode assembly to start the oil pump 811, and the second oil pump 811 electrode 86 and the third oil pump 811 electrode 87 are disconnected as a signal for the oil pump 811 electrode assembly to stop the oil pump 811; the lower end of the first water pump 810 electrode 88 is located below the upper end of the third oil pump 811 electrode 87.

[0051] The six-way valve 2, the intermediate container 3, the intermediate stirring container 4, the three-way valve 14, the slit model 5, the pressure transmitter 7 connected between the slit model 5 and the back pressure valve 6, and the pressure transmitter 7 arranged on the pipeline where the input end of the slit model 5 is merged into one are all located inside the first constant temperature box 12, and the temperature of the first constant temperature box 12 is 120°C; the back pressure valve 6 and the oil-water metering assembly 8 are all arranged inside the second constant temperature box 13, and the temperature of the second constant temperature box 13 is 60°C.

[0052] The working principle of the integrated device for evaluating the displacement and plugging performance of fracture-cavity reservoirs provided by the utility model is as follows:

[0053] (1) Working principle of displacement simulation of fracture-cavity reservoir: adjust the six-way valve 2 to the position where the constant speed and constant pressure pump 1 is connected to the intermediate stirring container 4, start the constant speed and constant pressure pump 1 to pump the granular displacement fluid into the intermediate stirring container 4, start the motor 41, and the stirring blade 43 stirs the granular displacement fluid in the body 44, so that the granular displacement fluid is injected into one or more fracture-cavity models 5 under stirring conditions, and the oil and water in the fracture-cavity model 5 are displaced by the displacement fluid. When the first water pump 810 electrode 88 and the second water pump 810 electrode 89 are connected, the water pump 810 is started to pump out the water pump 810, and when the first oil pump 811 electrode 85 and the second oil pump 811 electrode 86 are connected, the oil pump 811 is started to pump out the oil pump 811, so as to achieve oil-water separation during the displacement process. According to the amount of oil and water pumped out, the displacement simulation experiment can be analyzed; when the displacement fluid is not granular, the displacement fluid can be injected into the intermediate container 3.

[0054] (2) Working principle of evaluation of plugging performance of fracture-cavity reservoir: adjust the six-way valve 2 to the position where the constant speed and constant pressure pump 1 is connected to the intermediate stirring container 4, start the constant speed and constant pressure pump 1 to pump the granular plugging agent into the intermediate stirring container 4, start the motor 41, and the stirring blade 43 stirs the granular plugging agent in the body 44, so that the granular plugging agent is injected into one or more fracture-cavity models 5 under stirring conditions, and is kept in the first constant temperature box 12 for 24 hours to solidify the granular plugging agent and plug the cracks 51 in the fracture-cavity model 5; After 4 hours, the six-way valve 2 is adjusted to the position where the constant speed and constant pressure pump 1 is connected to the intermediate container 3, and the constant speed and constant pressure pump 1 is started to inject water into the fracture model 5 after passing through the intermediate container 3. The pressure of the pumped water is continuously increased by adjusting the pressure of the constant speed and constant pressure pump 1. When the first water pump 810 electrode 88 and the second water pump 810 electrode 89 in the oil-water metering pipe are connected, the water pump 810 is started and pumps out a set amount of water, the pressure value of the constant speed and constant pressure pump 1 at this time is set to the strength of the plugging agent, and the injection of water into the fracture model 5 is stopped.

[0055] The utility model can simultaneously simulate the displacement of fracture-cavity reservoirs and evaluate the plugging performance of plugging agents; it can also evaluate the plugging performance of granular plugging agents. By setting an intermediate stirring container 4 and a stirring assembly, the granular plugging agent can be injected under stirring conditions to prevent the granular plugging agent from settling. Secondly, the fracture-cavity model 5 is made of an artificial steel fracture-cavity model 5 instead of cement casting, so that the model can be reused and is resistant to high pressure and high temperature. An oil-water metering pipe is added to achieve oil-water separation during displacement.

[0056] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Simple modifications or equivalent substitutions of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. An integrated device for evaluating displacement and plugging performance of fracture-cavity reservoirs, characterized in that: The invention comprises a driving pump, a container component and an experimental component, wherein the experimental component comprises a fracture model, a back pressure component and an oil-water metering component, the container component is provided with an input end and an output end, and the fracture model is also provided with an input end and an output end; the input end of the container component is connected to the driving pump, the output end of the container component is connected to the input end of the fracture model, the output end of the fracture model is connected to the oil-water metering component, and a back pressure component is provided on the pipeline connecting the fracture model and the oil-water metering component.

2. The integrated device for evaluating displacement and plugging performance of fracture-cavity reservoirs according to claim 1, characterized in that: The container assembly includes an intermediate stirring container and an intermediate container, the upper ends of the intermediate stirring container and the intermediate container are set as input ends, the lower ends of the intermediate stirring container and the side walls of the intermediate container are set as output ends, the input ends of the intermediate stirring container and the intermediate container are connected to the driving pump through a first valve, and the output ends of the intermediate stirring container and the intermediate container are connected to the slit model through a second valve.

3. The integrated device for evaluating the displacement and plugging performance of fracture-cavity reservoirs according to claim 2, characterized in that: The intermediate stirring container comprises a body and a stirring component. The body is a hollow structure. The upper end of the body is an input end, the lower end of the body side wall is an output end, and the stirring component is arranged through the lower wall of the body.

4. The integrated device for evaluating the displacement and plugging performance of fracture-cavity reservoirs according to claim 3, characterized in that: The stirring assembly includes a motor, a stirring shaft and a stirring blade. The motor is arranged below the body. The output end of the motor is fixedly connected to the stirring shaft. The stirring shaft passes through the lower wall of the body. The end of the stirring shaft extending into the body is fixedly connected to the stirring blade.

5. The integrated device for evaluating displacement and plugging performance of fracture-cavity reservoirs according to claim 4, characterized in that: The stirring blade is arranged correspondingly to the position of the output end of the body.

6. The integrated device for evaluating displacement and plugging performance of fracture-cavity reservoirs according to claim 2, characterized in that: There are multiple intermediate stirring containers.

7. The integrated device for evaluating displacement and plugging performance of fracture-cavity reservoirs according to claim 6, characterized in that: The output ends of the plurality of intermediate stirring containers are all provided with valves.

8. The integrated device for evaluating displacement and plugging performance of fracture-cavity reservoirs according to claim 1, characterized in that: The driving pump is a constant speed and constant pressure pump.

9. The integrated device for evaluating displacement and plugging performance of fracture-cavity reservoirs according to claim 1, characterized in that: There are multiple experimental components, and the multiple experimental components are arranged in parallel. The input ends of the multiple crack models are combined into a pipeline connected to the container component.

10. The integrated device for evaluating displacement and plugging performance of fracture-cavity reservoirs according to claim 9, characterized in that: The back-pressure assembly includes a back-pressure valve, a buffer tank and a back-pressure pump. The back-pressure valve is provided with three interfaces, the first interface is connected to the output end of the fracture model, the second interface is connected to the oil-water metering assembly, and the third interface is connected to the buffer tank. The end of the buffer tank away from the back-pressure valve is connected to the back-pressure pump.

11. The integrated device for evaluating displacement and plugging performance of fracture-cavity reservoirs according to claim 10, characterized in that: The buffer tanks arranged inside the multiple experimental components are connected to the same back pressure pump.

12. The integrated device for evaluating displacement and plugging performance of fracture-cavity reservoirs according to claim 11, characterized in that: Pressure transmitters are provided on the pipeline that connects the input ends of the plurality of the slot models, on the pipeline that connects the slot model with the back pressure valve, and on the buffer tank.

13. The integrated device for evaluating displacement and plugging performance of fracture-cavity reservoirs according to claim 12, characterized in that: The container assembly, the slit model, the pressure transmitter arranged on the pipeline where the input ends of the plurality of slit models converge into one, and the pressure transmitter arranged on the pipeline connecting the slit model and the back pressure valve are all arranged inside the first constant temperature box.

14. The integrated device for evaluating displacement and plugging performance of fracture-cavity reservoirs according to claim 10, characterized in that: The oil-water metering assembly and the back-pressure valve are arranged inside the second thermostatic box.

15. The integrated device for evaluating displacement and plugging performance of fracture-cavity reservoirs according to claim 1, characterized in that: The oil-water metering component includes a first vertical pipe, a second vertical pipe, a third vertical pipe, multiple cross pipes, an oil pump and a water pump. The upper ends and lower ends of the first vertical pipe, the second vertical pipe and the third vertical pipe are connected through the cross pipe, and the middle of the first vertical pipe and the second vertical pipe is also connected through the cross pipe. The first vertical pipe is connected to the oil pump at a position corresponding to the middle connecting cross pipe, and the lower end of the first vertical pipe is connected to the water pump.

16. The integrated device for evaluating displacement and plugging performance of fracture-cavity reservoirs according to claim 15, characterized in that: A water pump electrode assembly is provided inside the second vertical pipe, and an oil pump electrode assembly is provided inside the third vertical pipe. The water pump electrode assembly is used to control the start and stop of the water pump, and the oil pump electrode assembly is used to control the start and stop of the oil pump.

17. The integrated device for evaluating the displacement and plugging performance of fracture-cavity reservoirs according to claim 16, characterized in that: The water pump electrode assembly includes a first water pump electrode and a second water pump electrode. The first water pump electrode is penetrated through the upper wall of the second vertical pipe, and the second water pump electrode is penetrated through the lower wall of the second vertical pipe. The lower end of the first water pump electrode is located above the upper end of the second water pump electrode.

18. The integrated device for evaluating displacement and plugging performance of fracture-cavity reservoirs according to claim 17, characterized in that: The oil pump electrode assembly includes a first oil pump electrode, a second oil pump electrode and a third oil pump electrode. The first oil pump electrode and the second oil pump electrode are penetrated through the upper wall of the third vertical pipe, and the third oil pump electrode is penetrated through the lower wall of the third vertical pipe. The first oil pump electrode and the second oil pump electrode are arranged in parallel, the lower end of the first oil pump electrode is located above the lower end of the second oil pump electrode, and the lower end of the second oil pump electrode is located above the upper end of the third oil pump electrode.

19. The integrated device for evaluating displacement and plugging performance of fracture-cavity reservoirs according to claim 18, characterized in that: The lower end of the first water pump electrode is located below the upper end of the third oil pump electrode.

20. The integrated device for evaluating displacement and plugging performance of fracture-cavity reservoirs according to claim 1, characterized in that: The fracture-hole model is connected with a ring pressure tracking pump.

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