阅读说明：本技术 缝洞型油藏物模装置及用于评价流道调整增效用剂的装置 (Fracture-cavity oil reservoir physical model device and device for evaluating flow channel adjustment synergistic agent ) 是由 何晓庆 杨祖国 钱真 巫光胜 甄恩龙 焦保雷 张雯 柏森 刘磊 王建海 何龙 于 2021-01-21 设计创作，主要内容包括：本发明公开了一种缝洞型油藏物模装置及用于评价流道调整增效用剂的装置,所述缝洞型油藏物模装置包括支架、隔板、以及溶洞模型,所述隔板设置至少一个且设置在所述支架上,所述溶洞模型设置多个且可拆卸设置在所述隔板上,溶洞模型之间通过连接管相连,所述连接管用于模拟所述缝洞型油藏的缝。本发明可用于模拟缝洞型油藏剩余油分布,并可评价多种流道调整增效用剂的适应性。该模型采用组装拼接方式,可模拟多种类型的剩余油分布,并可根据现场的实际需要调整缝洞位置。通过该模型可有效评价低密度驱替体系、溶洞油水隔板剂、暂堵化学桥塞等体系对于缝洞型油藏的适应性,对进一步分析各类流道调整增效用剂增效机理具有重要意义。(The invention discloses a fracture-cavity type reservoir physical model device and a device for evaluating a flow channel adjustment synergistic agent. The method can be used for simulating the distribution of the residual oil of the fracture-cavity oil reservoir and evaluating the adaptability of various flow channel adjustment synergistic agents. The model adopts an assembly splicing mode, can simulate the distribution of various types of residual oil, and can adjust the position of a slot hole according to the actual needs on site. The model can effectively evaluate the adaptability of systems such as a low-density displacement system, a karst cave oil-water partition agent, a temporary plugging chemical bridge plug and the like to the fracture-cavity type oil reservoir, and has important significance for further analyzing the synergistic mechanism of various flow passage adjusting synergistic agents.)

1. The utility model provides a fracture-cavity type oil reservoir physical model device, its characterized in that includes support, baffle and solution cavity model, the baffle sets up at least one and sets up on the support, the solution cavity model sets up a plurality ofly and can dismantle the setting and be in on the baffle, link to each other through the connecting pipe between the solution cavity model, the connecting pipe is used for the simulation the seam of fracture-cavity type oil reservoir.

2. The fracture-cavity oil reservoir physical model device of claim 1, wherein the karst cave model comprises an upper semi-ellipsoid and a lower semi-ellipsoid which are symmetrical and hollow, the upper semi-ellipsoid is provided with an upper flange, the lower semi-ellipsoid is provided with a lower flange, the upper flange is connected with the lower flange, and the upper semi-ellipsoid and the lower semi-ellipsoid together simulate the karst cave of the fracture-cavity oil reservoir; the upper flanging or the lower flanging is provided with at least one inlet and outlet communicated with the hole, and the connecting pipe is connected with the inlet and outlet.

3. The fracture-cavity reservoir model device of claim 1, wherein the karst cave model comprises an upper shell and a lower shell which are connected, a first groove is formed in the lower surface of the upper shell, a second groove is formed in the upper surface of the lower shell, and the first groove and the second groove are correspondingly and jointly positioned to simulate the karst cave of the fracture-cavity reservoir; the upper shell or the lower shell is provided with at least one inlet and outlet communicated with the hole, and the connecting pipe is connected with the inlet and outlet.

4. The fracture-cavity reservoir physical model device of claim 2 or 3, wherein the karst cave model further comprises a sealing groove, and a sealing ring is arranged in the sealing groove;

when the karst cave model is the karst cave model in claim 2, the sealing groove is arranged on the lower surface of the upper flanging to surround the upper semi-ellipsoid or on the upper surface of the lower flanging to surround the lower semi-ellipsoid;

when the cavern model is the cavern model in claim 3, the sealing groove is arranged on the lower surface of the upper shell to surround the first groove, or is arranged on the upper surface of the lower shell to surround the second groove.

5. The fracture-cavity reservoir physical model device of any one of claims 1-4, wherein the cavern model is made of transparent plexiglas, stainless steel or marble.

6. The fracture-cavity type reservoir physical model device of claim 2, wherein the partition plate comprises a front partition plate and a rear partition plate which are symmetrical, the left end and the right end of the front partition plate and the right end of the rear partition plate are respectively connected with a left partition plate and a right partition plate which are symmetrical, and the distance between the front partition plate and the rear partition plate is larger than the sum of the thicknesses of the upper flanging and the lower flanging and smaller than the distance between the top of the upper semi-ellipsoid and the bottom of the lower semi-ellipsoid; arc-shaped gaps matched with the lower semi-ellipsoid and the upper semi-ellipsoid are respectively arranged on the front partition plate and the rear partition plate, and the semi-ellipsoid of the karst cave model is hung on the arc-shaped gaps.

7. The fracture-cavity reservoir physical model device of claim 6, wherein the left partition and/or the right partition are provided with openings penetrating through the left end and the right end of the partition.

8. An apparatus for evaluating a flow path modification enhancer comprising a advection pump, an intermediate vessel, a pressure sensor, a workstation, a camera, and the fracture-cavity reservoir phantom apparatus of any of claims 1-7; the constant-flow pump is used for injecting displacement water and is connected with the intermediate container; a flow channel adjustment synergist is arranged in a cavity of the intermediate container close to the outlet end, the intermediate container is connected with the fracture-cavity type oil reservoir physical model device, and simulated oil is stored in a karst cave model of the fracture-cavity type oil reservoir physical model device; the pressure sensor is connected with the fracture-cavity type oil reservoir physical model device or connected with an inlet and an outlet of the fracture-cavity type oil reservoir physical model device; the workstation is connected with the pressure sensor and used for recording the measurement data of the pressure sensor; the camera is used for shooting the oil displacement process of the flow passage adjustment synergistic agent.

9. The device for evaluating a flow-path-modification synergist of claim 8, wherein the advection pump has a flow rate of 0.01-10mL/min and a pressure of less than 40 MPa.

10. The apparatus for evaluating a flow-path-modification synergist of claim 9, wherein when the cavern model is made of organic glass, the pressure of the advection pump is less than 1 MPa; when the karst cave model is made of stainless steel, the pressure of the advection pump is less than 40 MPa; when the karst cave model is made of marble materials, the pressure of the advection pump is less than 10 MPa.

Technical Field

The invention relates to the technical field of fracture-cavity type oil reservoir physical model devices, in particular to a fracture-cavity type oil reservoir physical model device and a device for evaluating a flow passage adjusting synergistic agent.

Background

In order to research the residual oil rule of the fractured-vuggy reservoir carbonate reservoir, a physical model is adopted to simulate the actual geological condition at home and abroad, and the actual effect of the flow channel adjustment synergist is evaluated by using the physical model. Common fracture-cavity oil reservoir physical models at home and abroad are mostly simulated by using a one-step formed marble etching model or a similar organic glass model. The model is large in size and difficult to form, and the model is completely damaged and cannot be repaired after being locally damaged. After damage, the remanufactured simulation is difficult to keep completely consistent with the original model, and the subsequent experimental results are inconsistent. In fracture-cavity oil reservoir physical model devices at home and abroad, a corresponding flow channel adjustment synergistic agent is evaluated according to requirements, and the device cannot be used for evaluating various flow channel adjustment synergistic agents, particularly for a flow channel adjustment mode of a model which is easy to damage, such as profile control and water shutoff, most devices cannot meet the evaluation requirements, or the cost of the evaluation device is too high. In addition, many fracture-cavity oil reservoir physical model devices at home and abroad are simulated according to a certain oil reservoir block, so that corresponding experimental results are obtained according to the conditions of the current block. When the oil reservoir area changes, the physical model cannot be used continuously, and the physical model needs to be redesigned, so that waste is caused.

Disclosure of Invention

In view of the above problems, the present invention aims to provide a fracture-cavity reservoir physical model device for evaluating a flow channel adjustment synergist.

The technical scheme of the invention is as follows:

on the one hand, provide a fracture-cavity type oil reservoir thing mould device, including support, baffle and solution cavity model, the baffle sets up at least one and sets up on the support, the solution cavity model sets up a plurality ofly and can dismantle the setting and be in on the baffle, link to each other through the connecting pipe between the solution cavity model, the connecting pipe is used for the simulation the seam of fracture-cavity type oil reservoir.

Preferably, the karst cave model comprises an upper semi-ellipsoid and a lower semi-ellipsoid which are symmetrical and hollow, the upper semi-ellipsoid is provided with an upper flanging, the lower semi-ellipsoid is provided with a lower flanging, the upper flanging is connected with the lower flanging, and the upper semi-ellipsoid and the lower semi-ellipsoid jointly simulate the karst cave of the fracture-cavity type oil reservoir; the upper flanging or the lower flanging is provided with at least one inlet and outlet communicated with the hole, and the connecting pipe is connected with the inlet and outlet.

Preferably, the karst cave model comprises an upper shell and a lower shell which are connected, wherein a first groove is formed in the lower surface of the upper shell, a second groove is formed in the upper surface of the lower shell, and the positions of the first groove and the second groove correspond to each other to jointly simulate the karst cave of the fracture-cavity type oil reservoir; the upper shell or the lower shell is provided with at least one inlet and outlet communicated with the hole, and the connecting pipe is connected with the inlet and outlet.

Preferably, the karst cave model further comprises a sealing groove, and a sealing ring is arranged in the sealing groove;

when the karst cave model is a karst cave model comprising the upper semi-ellipsoid and the lower semi-ellipsoid, the sealing groove is arranged on the lower surface of the upper flanging to surround the upper semi-ellipsoid or on the upper surface of the lower flanging to surround the lower semi-ellipsoid;

when the karst cave model is a karst cave model comprising the upper shell and the lower shell, the sealing groove is formed in the lower surface of the upper shell and surrounds the first groove, or is formed in the upper surface of the lower shell and surrounds the second groove.

Preferably, the cavern model is made of transparent organic glass, stainless steel or marble.

Preferably, the partition plate comprises a front partition plate and a rear partition plate which are symmetrical, the left end and the right end of the front partition plate and the right end of the rear partition plate are respectively connected with the left partition plate and the right partition plate which are symmetrical, and the distance between the front partition plate and the rear partition plate is larger than the sum of the thicknesses of the upper flanging and the lower flanging and smaller than the distance between the top of the upper semi-ellipsoid and the bottom of the lower semi-ellipsoid; arc-shaped gaps matched with the lower semi-ellipsoid and the upper semi-ellipsoid are respectively arranged on the front partition plate and the rear partition plate, and the semi-ellipsoid of the karst cave model is hung on the arc-shaped gaps.

Preferably, the left partition plate and/or the right partition plate are provided with openings penetrating through the left end and the right end of the partition plate.

On the other hand, the device for evaluating the flow channel adjustment synergistic agent comprises a constant-flow pump, an intermediate container, a pressure sensor, a workstation, a camera and the fracture-cavity reservoir physical model device; the constant-flow pump is used for injecting displacement water and is connected with the intermediate container; a flow channel adjustment synergist is arranged in a cavity of the intermediate container close to the outlet end, the intermediate container is connected with the fracture-cavity type oil reservoir physical model device, and simulated oil is stored in a karst cave model of the fracture-cavity type oil reservoir physical model device; the pressure sensor is connected with the fracture-cavity type oil reservoir physical model device or connected with an inlet and an outlet of the fracture-cavity type oil reservoir physical model device; the workstation is connected with the pressure sensor and used for recording the measurement data of the pressure sensor; the camera is used for shooting the oil displacement process of the flow passage adjustment synergistic agent.

Preferably, the flow rate of the constant-flow pump is 0.01-10mL/min, and the pressure is less than 40 MPa.

Preferably, when the karst cave model is made of organic glass materials, the pressure of the advection pump is less than 1 MPa; when the karst cave model is made of stainless steel, the pressure of the advection pump is less than 40 MPa; when the karst cave model is made of marble materials, the pressure of the advection pump is less than 10 MPa.

The invention has the beneficial effects that: the invention can effectively simulate the residual oil of the fracture-cavity type oil reservoir by different assembly modes, can evaluate the adaptability and the displacement effect of various flow passage adjusting synergistic agents including a low-density displacement system, a solution cavity oil-water separating agent, a temporary plugging chemical bridge plug and the like, can record the oil displacement process of various flow passage adjusting synergistic agents by shooting through an external camera, and forms a set of multifunctional fracture-cavity type oil reservoir physical model device for evaluating various agents by using equipment.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a fracture-cavity reservoir physical model device according to the present invention;

FIG. 2 is a schematic structural diagram of one embodiment of a fracture-cavity reservoir physical model device bracket according to the invention;

FIG. 3 is a schematic structural diagram of one embodiment of a fracture-cavity reservoir physical model device partition plate according to the present invention;

FIG. 4 is a schematic structural diagram of one embodiment of a fracture-cavity reservoir physical model device bracket and baffle assembly according to the invention;

FIG. 5 is a schematic diagram of an elevation structure of a karst cave model of the fracture-cavity reservoir physical model device according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of an explosion structure of a cave model of a fracture-cavity reservoir physical model device according to an embodiment of the invention;

FIG. 7 is a schematic structural diagram of another embodiment of a cave-type reservoir physical model device karst cave model of the invention.

Reference numbers in the figures: 1-bracket, 101-base, 102-left side plate, 103-right side plate and 104-opening II; 2-partition plate, 201-front partition plate, 202-rear partition plate, 203-left partition plate, 204-right partition plate, 205-arc notch and 206-opening I; 3-a karst cave model; 301-upper semi-ellipsoid, 302-lower semi-ellipsoid, 303-upper flanging, 304-lower flanging, 305-inlet and outlet, 306-sealing groove and 307-bolt; 311-upper shell, 312-lower shell, 313-groove I and 314-groove II; 4-connecting pipe.

Detailed Description

The invention is further illustrated with reference to the following figures and examples.

It should be noted that, in the present application, the embodiments and the technical features of the embodiments may be combined with each other without conflict.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present invention, the terms "first", "second", and the like are used for distinguishing similar objects, but not for describing a particular order or sequence order, unless otherwise specified. It is to be understood that the terms so used; the terms "upper", "lower", "left", "right", and the like are used generally with respect to the orientation shown in the drawings, or with respect to the component itself in a vertical, or gravitational orientation; likewise, "inner", "outer", and the like refer to the inner and outer relative to the contours of the components themselves for ease of understanding and description. The above directional terms are not intended to limit the present invention.

On one hand, as shown in fig. 1-7, the invention provides a fracture-cavity type reservoir physical model device, which comprises a support 1, partition plates 2 and a karst cave model 3, wherein at least one partition plate 2 is arranged on the support 1, a plurality of karst cave models 3 are arranged on the partition plates 2 and are detachably arranged, the karst cave models 3 are connected through connecting pipes 4, and the connecting pipes 4 are used for simulating the fracture of the fracture-cavity type reservoir.

In a specific embodiment, the karst cave model 3 includes an upper semi-ellipsoid 301 and a lower semi-ellipsoid 302 which are symmetrical and hollow, the upper semi-ellipsoid 301 is provided with an upper flange 303, the lower semi-ellipsoid 302 is provided with a lower flange 304, the upper flange 303 is connected with the lower flange 304, and the upper semi-ellipsoid 301 and the lower semi-ellipsoid 302 jointly simulate the karst cave of the fracture-cavity type oil reservoir; the upper flange 303 or the lower flange 304 is provided with at least one inlet/outlet 305 communicating with the hole, and the connecting pipe 4 is connected with the inlet/outlet 305.

In order to enhance the sealing performance of the cavern model 3, optionally, the cavern model 3 further comprises a sealing groove 306, and a sealing ring (not shown in the figure) is arranged in the sealing groove 306. The sealing groove 306 is arranged on the lower surface of the upper flange 303 and surrounds the upper semi-ellipsoid 301, or is arranged on the upper surface of the lower flange 304 and surrounds the lower semi-ellipsoid 302;

in this embodiment, optionally, the partition board 2 is detachably disposed on the bracket 1. In a specific embodiment, the detachable partition 2 comprises a front partition 201 and a rear partition 202 which are symmetrical, the left and right ends of the front partition 201 and the rear partition 202 are respectively connected with a left partition 203 and a right partition 204 which are symmetrical, and the distance between the front partition 201 and the rear partition 202 is greater than the sum of the thicknesses of the upper flange 303 and the lower flange 304 and is smaller than the distance between the top of the upper semi-ellipsoid 301 and the bottom of the lower semi-ellipsoid 302; arc-shaped notches 205 matched with the lower semi-ellipsoid 302 and the upper semi-ellipsoid 301 are respectively arranged on the front partition plate 201 and the rear partition plate 202, and the semi-ellipsoid of the karst cave model 3 is hung on the arc-shaped notches 205. Optionally, in this embodiment, the bracket 1 includes a base 101, and a left side plate 102 and a right side plate 103 that are symmetrically disposed at left and right ends of an upper surface of the base 101, a cross section of the left side plate 102 and the right side plate 103 is a v-21274v-shaped, and left and right ends of the partition plate 2 are fixed in a v-21274v-shaped frame by being inserted into the left side plate 102 and the right side plate 103. Optionally, the heights of the left partition plate 203 and the right partition plate 204 are greater than the heights of the front partition plate 201 and the rear partition plate 202, and are greater than the height of the highest horizontal plane behind the arc-shaped notch 205 at which the karst cave model 3 is suspended, so that when multiple layers of partition plates are arranged, the karst cave models on the upper partition plate and the upper partition plate exert pressure on the karst cave model on the lower partition plate, and the experimental accuracy is affected.

It should be noted that the karst cave shape formed by the upper semi-ellipsoid 301 and the lower semi-ellipsoid 302 includes but is not limited to an ellipse, a sphere, a kidney, and the like, and the specific karst cave shape can be set according to the needs of a user.

In addition, optionally, a first opening 206 penetrating through the left end and the right end of the partition plate is arranged on the left partition plate 203 and/or the right partition plate 204, a second opening 104 penetrating through the left end and the right end of the side plate is arranged on the left side plate 102 and/or the right side plate 103 of the bracket 1, and the first opening 206 and the second opening 104 can facilitate the connection pipe 4 to penetrate out.

In another specific embodiment, the karst cave model 3 comprises an upper shell 311 and a lower shell 312 which are connected, wherein a first groove 313 is formed in the lower surface of the upper shell 311, a second groove 314 is formed in the upper surface of the lower shell 312, and the positions of the first groove 313 and the second groove 314 correspond to each other to jointly simulate the karst cave of the fracture-cavity type oil reservoir; the upper shell 311 or the lower shell 312 is provided with at least one inlet/outlet 305 communicating with the hole, and the connecting pipe 4 is connected with the inlet/outlet 305.

In order to enhance the sealing performance of the cavern model 3 of the present embodiment, the cavern model 3 is also provided with a sealing groove 306, and a sealing ring (not shown in the figure) is disposed in the sealing groove 306. The sealing groove 306 in this embodiment is disposed on the lower surface of the upper housing 311 surrounding the first groove 313, or disposed on the upper surface of the lower housing 312 surrounding the second groove 314.

In this embodiment, optionally, the partition board 2 is integrally formed with the bracket 1, the upper housing 311 and the lower housing 312 are symmetrical cubes, the partition board 2 is a rectangular parallelepiped plate, and the karst cave model 3 is directly placed on the partition board 2.

In all the above embodiments, the upper flange 303 and the lower flange 304, and the upper housing 311 and the lower housing 312 may be connected by a conventional connection method capable of sealing connection, such as a bolt 307, and the present invention is not limited to a specific sealing connection method.

In a specific embodiment, the karst cave model 3 is made of transparent organic glass, stainless steel or marble, the partition plate 2 and the bracket 1 are made of wood, transparent organic glass, stainless steel or the like, the connecting pipe 4 comprises a plurality of connecting pipes with different inner diameters, for example, various different inner diameters within the range of 0.2-3mm, and may further comprise a reducing connecting pipe, and the connecting pipe 4 is made of a transparent plastic pipe or a stainless steel pipe.

In another aspect, the invention further provides a device for evaluating the flow channel adjustment synergistic agent, which comprises a advection pump, an intermediate container, a pressure sensor, a workstation, a camera and the fracture-cavity reservoir physical model device described in any one of the above items; the constant-flow pump is used for injecting displacement water and is connected with the intermediate container; a flow channel adjustment synergist is arranged in a cavity of the intermediate container close to the outlet end, the intermediate container is connected with the fracture-cavity type oil reservoir physical model device, and simulated oil is stored in a karst cave model of the fracture-cavity type oil reservoir physical model device; the pressure sensor is connected with the fracture-cavity type oil reservoir physical model device or connected with an inlet and an outlet of the fracture-cavity type oil reservoir physical model device; the workstation is connected with the pressure sensor and used for recording the measurement data of the pressure sensor, and optionally, a pressure-time change curve of pressure changing along with time can be generated according to the recorded measurement data; the camera is used for shooting the oil displacement process of the flow passage adjustment synergistic agent.

In a specific embodiment, the flow rate of the advection pump is 0.01-10mL/min, and the pressure is less than 40 MPa. When the karst cave model 3 is made of organic glass materials, the pressure of the advection pump is less than 1 MPa; when the karst cave model 3 is made of stainless steel materials, the pressure of the advection pump is less than 40 MPa; when the karst cave model 3 is made of marble, the pressure of the advection pump is less than 10 MPa.

It should be noted that the advection pump, the intermediate container, the pressure sensor, the workstation, and the camera are all in the prior art, and the specific structures thereof are not described herein again.

In a specific embodiment, the fracture-cavity type reservoir model device in the device for evaluating the flow channel adjustment synergist is the above-mentioned embodiment including the structure of the upper half ellipsoid 301 and the lower half ellipsoid 302, the cavern model 3 and the partition plate 2 in this embodiment are made of transparent organic glass, the support 1 is made of stainless steel, the partition plate 2 is provided with three layers, each layer is provided with three arc-shaped notches 205, that is, 9 cavern models 3 can be placed in total, each cavern model 3 is provided with 8 inlets and outlets 305 uniformly distributed along the circumferential direction of the lower turned-over edge 304, and the inlet and outlet 305 not connected with the connecting pipe 4 is blocked by a stopper pipe (not shown in the figure). The following tests were carried out using this example:

test 1

And evaluating the adaptability of the low-density displacement system by using the device for evaluating the flow channel adjustment synergistic agent.

And simulating attic oil fracture-hole distribution by using the fracture-hole type oil reservoir physical model device, and then performing a displacement experiment by using the device for evaluating the flow channel adjustment synergist. The experimental result shows that after the displacement water (blue) is injected, the displacement water is mainly distributed in the karst cave at the lower layer of the karst cave model, and the residual oil (red) at the upper layer cannot be displaced. After the low-density displacement system is used, the residual oil on the upper part is swept and displaced, which shows that the low-density displacement system can effectively adapt to the distribution of the residual oil such as attic oil, and the recovery ratio of the low-density displacement system is effectively improved.

Test 2

The device for evaluating the flow channel adjustment synergistic agent is used for evaluating the adaptability of the karst cave oil-water partition agent system.

Observing the karst cave in the karst cave model after displacement, wherein the karst cave without the karst cave oil-water partition agent is shown to be tapered, which shows that the water coning phenomenon in the displacement process is very obvious, and the recovery ratio is influenced. And the karst cave added with the karst cave oil-water partition agent can show that the bottom water coning phenomenon disappears after the karst cave oil-water partition agent is added, which shows that the karst cave oil-water partition agent can effectively inhibit the bottom water coning phenomenon in the displacement process and effectively improve the recovery ratio of the karst cave body.

Test 3

And evaluating the adaptability of the temporary plugging chemical bridge plugging system by using the device for evaluating the flow channel adjustment synergist.

And performing water flooding twice, and finding that most of residual oil in the upper-layer karst cave is difficult to displace after the first water flooding. After the temporary plugging chemical bridge plug system is injected, the lower dominant channel can be effectively plugged, so that the residual oil on the upper part is used. After the second water flooding, the residual oil on the upper layer is obviously reduced, which shows that the temporary plugging chemical bridge plug system can effectively help to improve the recovery ratio of the residual oil on the upper layer.

In conclusion, the fracture-cavity oil reservoir physical model device provided by the invention can simulate the distribution of various types of residual oil by adopting an assembly splicing mode, can adjust the fracture-cavity position according to the actual needs on site, does not need to redesign a physical model, saves resources, and can replace the same karst-cavity model after a certain karst-cavity model is damaged without discarding the whole device together. The method can effectively evaluate the adaptability of systems such as a low-density displacement system, a karst cave oil-water partition agent, a temporary plugging chemical bridge plug and the like to the fracture-cavity type oil reservoir, and has important significance for further analyzing the synergistic mechanism of various flow passage adjusting synergistic agents.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.