Horizontal well washing simulation experiment device

Abstract

The invention relates to the field of in-situ leaching mine production, and provides a horizontal well washing simulation experiment device which comprises an ore bed simulation system used for simulating an ore bed environment and comprising a box body, the top of the box body is of an open structure, the box body is filled with ore bed rock powder to construct a simulation rock stratum, and a plurality of injection connectors are formed in the side wall of the box body; the impact force testing system is buried in the simulated rock stratum and comprises a self-advancing force and axial pressure testing device, a radial pressure testing device and a bent connecting pipe, the self-advancing force and axial pressure testing device and the radial pressure testing device are connected through a screen pipe, and the first end of the bent connecting pipe extends into the rock stratum to be connected with the jet radial pressure testing device; the second end penetrates out of the open structure of the box body; and the sand washing well washing system is detachably arranged in the bent pipe in a penetrating manner and is used for being connected with the well washing impact force testing system so as to carry out jet flow well washing, air well washing and liquid pumping simulation experiments. The in-situ leaching uranium mining production environment can be reduced, and evaluation of various well washing tools is achieved.

Description

Technical Field

[0001] This application relates to the field of in-situ leaching mine production technology, and more specifically, to a horizontal well washing simulation experimental device. Background Technology

[0002] Currently, directional horizontal well technology is a brand-new uranium leaching drilling technology that can effectively solve a series of problems faced by current leaching mine production, enabling leaching uranium mining technology to continue to maintain high economic efficiency and adaptability.

[0003] In related technologies, horizontal wells using the in-situ immersion process suffer from severe sand production problems after drilling and completion. Currently, there is no complete simulation experimental device for washing horizontal wells using the in-situ immersion process, making it impossible to effectively evaluate the washing effect under different washing measures. Summary of the Invention

[0004] To address the technical problem that the aforementioned horizontal well washing simulation experimental device cannot effectively evaluate the washing effect under different washing measures, this application proposes a horizontal well washing simulation experimental device.

[0005] In view of the above, according to the embodiment of the first aspect of this application, this application proposes a horizontal well washing simulation experimental device, comprising: a mineral layer simulation system for simulating a mineral layer environment, the mineral layer simulation system including a box, the top of the box being an open structure, the interior of the box being filled with mineral layer rock powder to construct a simulated rock layer, and multiple injection ports provided on the side wall of the box; an impact force testing system, embedded in the simulated rock layer, including a self-advancement force and axial pressure testing device, a radial pressure testing device, and a bent connecting pipe, the self-advancement force and axial pressure testing device and the radial pressure testing device being connected through a screen pipe, the first end of the bent connecting pipe extending into the rock layer and connected to the radial pressure testing device, and the second end extending out from the open structure of the box; and a sand flushing system, detachably installed inside the bent pipe, for connecting with the well washing impact force testing system to conduct jet washing, air washing, and pumping simulation experiments.

[0006] In some feasible embodiments, the radial pressure testing device includes: a first connecting pipe and a second connecting pipe arranged axially spaced apart, with a first end of the bent connecting pipe passing through the first connecting pipe; and a first test piece coaxially connected between the first and second connecting pipes for testing the radial pressure of the jet.

[0007] In some feasible methods, there are multiple radial pressure testing devices connected by a sieve tube.

[0008] In some feasible embodiments, the self-advancing force and axial pressure testing device includes: a third connecting pipe connected to the radial pressure testing device via a sieve pipe; and a second test piece disposed on the third connecting pipe, the detection direction of the second test piece being perpendicular to the detection direction of the first test piece.

[0009] In some feasible implementations, the sand flushing system includes: a jet flushing test unit, which includes: a delivery pipeline running through a bent connecting pipe; an injection pump connected to the inlet end of the delivery pipeline; and a jet nozzle installed at the outlet end of the delivery pipeline to form a jet.

[0010] In some feasible implementations, the sand flushing system also includes a high-pressure air well washing experimental unit, which includes an air pump connected to the inlet end of the delivery pipeline and a cavitation device connected to the outlet end of the delivery pipeline to generate a cavitation jet effect.

[0011] In some feasible implementations, the sand flushing system also includes a pump for connecting to the inlet end of the pipeline to conduct pumping simulation experiments.

[0012] In some feasible ways, the enclosure is made of transparent acrylic glass.

[0013] In some feasible implementations, the horizontal well washing simulation experimental device also includes an injection pump connected to multiple injection interfaces.

[0014] In some feasible embodiments, the horizontal well washing simulation experimental device also includes: a data analysis and processing unit connected to the impact force testing system, used to collect and record test data from the self-advancement force, axial pressure testing device, and radial pressure testing device, and to evaluate the well washing effect based on the test data.

[0015] Compared with related technologies, this application has the following technical advantages: The horizontal well washing test device provided by this application has an impact force testing system, a ore layer simulation system and a sand flushing system, which can restore the real production environment of in-situ leaching uranium mining and can evaluate a variety of well washing tools.

[0016] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description

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

[0018] Figure 1 One schematic diagram of a horizontal well washing simulation experimental apparatus according to one embodiment of this application is shown;

[0019] Figure 2 A schematic diagram of a horizontal well simulation and impact force testing system according to one embodiment of this application is shown;

[0020] Figure 3 A schematic diagram of a radial pressure testing apparatus according to one embodiment of this application is shown;

[0021] Figure 4 A schematic diagram of a sieve tube in one embodiment of this application is shown;

[0022] Figure 5 A schematic diagram of a self-advancing force and axial pressure testing device according to one embodiment of this application is shown;

[0023] Figure 6 A schematic diagram of a mineral layer simulation system according to one embodiment of this application is shown;

[0024] Figure 7 A schematic diagram of mineral rock powder in one embodiment of this application is shown;

[0025] Figure 8 A schematic diagram of a mineral layer simulation system in yet another embodiment of this application is shown;

[0026] Figure 9 A second schematic diagram of a horizontal well washing simulation experimental apparatus according to one embodiment of this application is shown;

[0027] Figure 10 The third schematic diagram of a horizontal well washing simulation experimental device according to one embodiment of this application is shown;

[0028] Figure 11 A schematic diagram of a sand flushing and well washing system according to one embodiment of this application is shown.

[0029] in, Figures 1 to 11 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0030] 101 Horizontal well deflection section, 102 First connecting pipe, 103 Radial pressure testing device, 104 Second connecting pipe, 105 Screen pipe, 106 Third connecting pipe, 112 Self-advancement force and axial pressure testing device, 114 Second test piece, 115 First test piece, 200 Ore layer simulation system, 201 Box body, 202 Injection interface, 301 Sand flushing and well washing system, 302 Delivery pipeline, 303 Functional area, 401 Data analysis and processing unit, 402 Injection pump, 403 Pumping pump. Detailed Implementation

[0031] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0032] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0033] The following reference Figures 1 to 11 This application describes a horizontal well washing simulation experimental apparatus according to some embodiments.

[0034] like Figure 1 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 As shown, this application provides a horizontal well washing simulation experimental device, including: a mineral layer simulation system 200 for simulating a mineral layer environment, the mineral layer simulation system 200 including a box 201, the top of the box 201 being an open structure, the interior of the box 201 being filled with mineral layer rock powder to construct a simulated rock layer, and multiple injection ports 202 provided on the side wall of the box 201; an impact force testing system, buried in the simulated rock layer, including a self-advancement force and axial pressure testing device 112, a radial pressure testing device 103, and a bent connecting pipe, the self-advancement force and axial pressure testing device 112 and the radial pressure testing device 103 being connected through a screen pipe 105, the first end of the bent connecting pipe extending into the rock layer and connecting to the radial pressure testing device 103, and the second end protruding from the open structure of the box 201; and a sand flushing system 301, detachably installed inside the bent pipe, for connecting with the well washing impact force testing system to conduct jet washing, air washing, and pumping simulation experiments.

[0035] The horizontal well washing simulation experimental device provided in this application includes a ore layer simulation system 200, an impact force testing system, and a sand flushing system 301. The ore layer simulation system 200, using a box 201 and filled with ore layer rock powder, constructs a simulated rock layer, which can realistically reproduce the actual ore layer environment, providing reliable environmental conditions for the well washing simulation experiment, making the experimental results closer to actual working conditions, and improving the accuracy and reliability of the experiment.

[0036] Multiple injection ports 202 are provided on the side wall of the housing 201 to facilitate the injection of drilling fluid, clean water or leaching agent into the simulated rock formation from different locations as needed during the experiment, meeting diverse experimental requirements and facilitating well washing simulation experiments under different conditions.

[0037] The impact force testing system is embedded in simulated rock formations and includes a self-advancement force and axial pressure testing device 112, a radial pressure testing device 103, and a bent connecting pipe. This system comprehensively and accurately measures key parameters such as pressure and self-advancement force in different directions (axial and radial) during well cleaning, providing data support for a deeper understanding of the mechanical characteristics of the well cleaning process and helping to optimize well cleaning technology and equipment design. The bent connecting pipe structure is used to simulate the horizontal well build-up section 101, making the experimental data closer to actual field conditions. The impact force testing system is also used for horizontal well simulation; therefore, it is a combined horizontal well simulation and impact force testing system.

[0038] The sand flushing and well washing system 301 is detachably installed inside a bent pipe and can be connected to a well washing impact force testing system to realize various simulation experiments such as jet washing, air washing, and fluid pumping. This multifunctional design enables the system to meet the research needs of different well washing methods, providing comprehensive experimental basis for the optimization and improvement of horizontal well washing technology, helping to improve well washing efficiency and quality, and reduce well washing costs.

[0039] The horizontal well washing simulation experimental device provided in this application has an impact force testing system, a ore layer simulation system 200 and a sand flushing system 301, which can reproduce the real production environment of in-situ leaching uranium mining and can evaluate a variety of well washing tools.

[0040] like Figure 2 and Figure 3 As shown, in some embodiments provided in this application, the radial pressure testing device 103 includes: a first connecting pipe 102 and a second connecting pipe 104 arranged axially spaced apart, with the first end of the bent connecting pipe passing through the first connecting pipe 102; and a first test piece 115, coaxially connected between the first connecting pipe 102 and the second connecting pipe 104, for testing the radial pressure of the jet.

[0041] In this embodiment, the radial pressure testing device 103 includes a first connecting pipe 102, a second connecting pipe 104, and a first test piece 115. The first connecting pipe 102 and the second connecting pipe 104, which are axially spaced apart, provide a stable structural frame for the entire radial pressure testing device 103. The first test piece 115 is coaxially connected between the first connecting pipe 102 and the second connecting pipe 104. This coaxial connection allows the first test piece 115 to accurately and stably withstand the radial pressure of the jet during the test, helping to reduce interference from external factors on the radial pressure test of the jet.

[0042] Because the first test piece 115 is located at a specific position between the first connecting pipe 102 and the second connecting pipe 104, it can directly reflect the radial force of the jet on the simulated rock strata, thereby achieving accurate measurement of the radial pressure of the jet and providing reliable data support for studying the mechanical influence of the jet on the rock strata during well washing.

[0043] like Figure 2 As shown, in some embodiments provided in this application, there are multiple radial pressure testing devices 103, and the multiple radial pressure testing devices 103 are connected through a sieve tube 105.

[0044] In this embodiment, multiple radial pressure testing devices 103 are connected by a screen pipe 105. The multiple radial pressure testing devices 103 are arranged at intervals along the axial direction of the horizontal well, which can realize multi-point synchronous measurement of the radial pressure of the jet, comprehensively obtain radial pressure data at various locations in the rock formation, accurately reflect the pressure distribution of the jet on different areas of the rock formation during the well washing process, and improve the integrity and accuracy of the data.

[0045] Multiple devices work together, so that when one device malfunctions, the others can still measure normally, avoiding the loss or error of experimental data due to a problem with a single device, and ensuring the smooth progress of the well washing simulation experiment and the reliability of the results.

[0046] like Figure 2 , Figure 4 and Figure 5 As shown, in some embodiments provided in this application, the self-advancing force and axial pressure testing device 112 includes: a third connecting pipe 106, which is connected to the radial pressure testing device 103 through a sieve pipe 105; and a second test piece 114, which is disposed on the third connecting pipe 106, and the detection direction of the second test piece 114 is perpendicular to the detection direction of the first test piece 115.

[0047] In this embodiment, the self-advancing force and axial pressure testing device 112 includes a third connecting pipe 106 and a second test piece 114. The third connecting pipe 106 is connected to the radial pressure testing device 103 through a screen pipe 105, allowing the self-advancing force and axial pressure testing device 112 to be integrated into the overall testing system and work in conjunction with the radial pressure testing device 103. The second test piece 114 is disposed on the third connecting pipe 106, and its detection direction is perpendicular to the first test piece 115. It can simultaneously measure axial pressure and radial pressure, comprehensively acquire pressure data in different directions during well washing, and more accurately restore the true stress situation of the rock formation during well washing.

[0048] The comprehensive acquisition of pressure data from different directions helps in the in-depth analysis of the jet's effect on the rock formation during well washing, and the study of the interaction between axial and radial pressure. This provides crucial information for optimizing well washing process parameters, such as jet angle and pressure magnitude, thereby improving well washing efficiency and quality.

[0049] like Figure 9 and Figure 11 As shown, in some embodiments provided in this application, the sand flushing and well washing system 301 includes: a jet well washing test unit, which includes: a delivery pipeline 302, which is installed inside a bent connecting pipe; an injection pump 402, which is connected to the inlet end of the delivery pipeline 302; and a jet nozzle, which is installed at the outlet end of the delivery pipeline 302 to form a jet.

[0050] In this embodiment, the sand flushing system 301 includes a jet flushing test unit, which includes a delivery pipeline 302, an injection pump 402, and a jet nozzle.

[0051] The delivery pipeline 302 is installed inside the bent connecting pipe, providing a stable delivery channel for the well-washing fluid and ensuring that the fluid can smoothly reach the designated location. The injection pump 402 is connected to the inlet end of the delivery pipeline 302, providing stable and adjustable power to ensure that the well-washing fluid enters the pipeline 302 at a suitable flow rate and pressure. The jet nozzle is installed at the outlet end of the delivery pipeline 302, converting the well-washing fluid into a high-energy jet.

[0052] By controlling the parameters of the injection pump 402, the intensity and flow rate of the jet can be flexibly adjusted to meet the well washing requirements under different experimental conditions. This facilitates the study of the influence of different jet parameters on the well washing effect and provides experimental basis for optimizing the well washing process.

[0053] In some embodiments provided in this application, the sand flushing and well washing system 301 further includes: a high-pressure air well washing test unit, which includes: an air pump connected to the inlet end of the delivery pipeline 302; and a cavitation device connected to the outlet end of the delivery pipeline 302 for generating a cavitation jet effect.

[0054] In this embodiment, the sand flushing and well washing system 301 also includes a high-pressure air well washing test unit, which includes an air pump and a cavitation device.

[0055] The air pump is connected to the inlet end of the delivery pipeline 302 to provide power for air delivery and ensure a stable airflow supply. The cavitation device is connected to the outlet end of the delivery pipeline 302 and can generate high-pressure air through the cavitation jet effect to simulate air well washing.

[0056] In some embodiments provided in this application, the sand flushing and well washing system 301 further includes a liquid pump 403 for connecting to the inlet end of the pipeline to conduct a liquid pumping simulation experiment.

[0057] In this embodiment, the sand flushing and well washing system 301 also includes a liquid pump 403. The liquid pump 403 enables the sand flushing and well washing system 301 to have the ability to simulate liquid pumping experiments, enriching the system functions and simulating the liquid pumping link in the actual well washing process, thus more comprehensively restoring the well washing operation scenario.

[0058] By conducting pumping simulation experiments connected to the pipeline inlet, the impact of different pumping parameters on well washing effects can be studied, such as pumping speed and pressure. This provides data support for optimizing well washing processes, helps to find more efficient well washing solutions, improves the quality and efficiency of well washing operations, and reduces well washing costs.

[0059] In some embodiments provided in this application, the box 201 is a transparent plexiglass box 201.

[0060] In this embodiment, the enclosure 201 is a transparent plexiglass enclosure 201. The transparent plexiglass enclosure 201 allows the experimenter to directly and clearly observe the conditions within the simulated rock formation during the well washing process, such as the impact of the jet on the rock formation, the movement of sand particles, and the flow of the well washing fluid, without the need for complex equipment, making it convenient to monitor the experimental dynamics in real time.

[0061] During the experiment, well-washing parameters, such as jet pressure and pumping speed, can be adjusted in a timely manner based on the observed phenomena to obtain more ideal experimental results, improve experimental efficiency, and provide intuitive evidence for in-depth research on well-washing mechanisms, thereby helping to optimize well-washing processes.

[0062] like Figure 1 As shown, in some embodiments provided in this application, the horizontal well washing simulation experimental device further includes: an injection pump connected to multiple injection interfaces 202.

[0063] In this embodiment, the horizontal well washing simulation experimental device also includes an injection pump. The injection pump is connected to multiple injection ports 202, which can precisely control the flow rate, pressure, and injection speed of the injected drilling fluid, water, or leaching agent, ensuring a stable and repeatable injection process, providing accurate and controllable injection conditions for the simulation experiment, and improving the reliability of the experimental results.

[0064] Through multiple injection interfaces 202, injection can be carried out from multiple directions to simulate various complex well washing scenarios, study the impact of different injection strategies on well washing effect, provide rich experimental data and reference for optimizing horizontal well washing process, and enhance the practicality and adaptability of the system.

[0065] like Figure 1 and Figure 8As shown, in some embodiments provided in this application, the horizontal well washing simulation experimental device further includes: a data analysis and processing unit 401, which is connected to the impact force testing system, for collecting and recording the test data of the self-advancement force, axial pressure testing device 112 and radial pressure testing device 103, and evaluating the well washing effect based on the test data.

[0066] In this embodiment, the horizontal well washing simulation experimental device also includes a data analysis and processing unit 401. The data analysis and processing unit 401 is connected to the impact force testing system and can quickly collect and record the test data of the self-advance force, axial pressure testing device, and radial pressure testing device 103, realizing centralized integration of test data, avoiding the tediousness and errors of manual recording, and improving the efficiency and accuracy of data collection.

[0067] Based on the comprehensive test data collected, the data analysis and processing unit 401 can use scientific algorithms and models to evaluate the well-washing effect. It can intuitively present the changing trend of the well-washing effect under different parameters, such as judging the degree of sand removal and whether the rock formation is under uniform stress, providing clear and accurate evaluation results for the experimenters.

[0068] like Figures 1 to 11 As shown, in a specific embodiment, the impact force testing system is also used for horizontal well simulation. The impact force testing system is a horizontal well simulation and impact force testing system, specifically including a radial pressure testing device 103, a self-advancement force and axial pressure testing device 112, and a bent connecting pipe. The self-advancement force and axial pressure testing device 112 and the radial pressure testing device 103 are connected to a central computer via a wired connection. The bent connecting pipe is used to simulate the horizontal well build-up section 101. The central computer is the data analysis and processing unit 401. The radial pressure testing device 103 is the jet radial pressure testing device, and the self-advancement force and axial pressure testing device 112 is the jet self-advancement force and axial pressure testing device.

[0069] The impact force test principle is a "sliding resistance" test. After the high-velocity water flow impacts, it will compress the test piece, reduce the resistance, increase the test current, and convert it into jet pressure. This technology is relatively mature and can be applied in this application. The self-advancing force and axial pressure test device 112 and radial pressure test device 103 have interfaces and can be connected to the bending connecting pipe and the screen pipe 105.

[0070] The impact force testing system is assembled as follows: the bent connecting pipe is connected to the radial pressure testing device 103 through an interface, the sieve pipe 105 is connected to the radial pressure testing device 103 through an interface, and the radial pressure testing device 103 and the sieve pipe 105 are connected in sequence in the same way. Finally, the sieve pipe 105 is connected to the self-advancing force and axial pressure testing device 112 through an interface.

[0071] The mineral layer simulation system 200 has an external structure made of transparent plexiglass, with an open-top box 201. Injection ports 202 are evenly distributed around the box, and the injection ports 202 are connected to injection pumps 402 and flow meters via injection pipelines. The box 201 is filled with mineral layer rock powder to simulate a real leaching environment.

[0072] The horizontal well simulation and impact force testing system is embedded in the middle of the rock powder; the pressure testing devices are all connected to the data processing center via data cables.

[0073] Sand flushing and well washing system 301: Used to be lowered into a horizontal well to perform functions such as jet flushing, air flushing, and fluid pumping. The sand flushing and well washing system 301 includes a delivery pipeline 302, which connects to a front-end functional area 303. Functional area 303 has connectors for connecting various equipment, including but not limited to jet nozzles and cavitation devices, for jet flushing and high-pressure air flushing. The end of the delivery pipeline 302 can be connected to an injection pump 402 and an air pump, serving as the water and air source for well washing. It should be noted that if functional area 303 is not connected to well washing equipment, a fluid pump 403 can be connected to the end of the pipeline to simulate fluid pumping in a horizontal well.

[0074] The specific simulation process is as follows:

[0075] Simulated drilling fluid damage and well-washing damage removal effects:

[0076] ① Assemble the horizontal well simulation and impact force testing system: The horizontal well build-up section 101 is connected to the jet radial pressure testing device through an interface, and the screen pipe 105 is connected to the jet radial pressure testing device through an interface. The jet radial pressure testing device and the screen pipe 105 are connected in the same way in sequence. Finally, the screen pipe 105 is connected to the jet self-advance force and axial pressure testing device through an interface.

[0077] ② Place ore layer rock powder into the ore layer simulation system 200, and bury the horizontal well simulation and impact force testing system in the middle of the ore layer rock powder;

[0078] ③ Use injection pump 402 to inject drilling fluid to simulate the damage environment of a horizontal well after drilling is completed; after a certain period of time, use injection pump 402 to inject clean water to simulate the pumping environment of a horizontal well after drilling is completed.

[0079] ④ Functional area 303 is not connected to the well washing equipment. Open the end of the delivery pipeline 302 and connect the pumping pump 403 to complete the horizontal well pumping simulation, maintain the system liquid level stability, and record the Q1 flow rate and P1 pressure data at this time.

[0080] ⑤ Connect the jet nozzle to functional area 303, place the sand flushing system 301 in the horizontal well simulation and impact force testing system, and turn on the injection pump 402 to perform jet flushing; if simulating air flushing, replace it with an air pump, and connect the cavitation device to functional area 303.

[0081] ⑥ During the jet well washing process, the lateral impact force and the axial impact force will be recorded. When the nozzle advances to the horizontal well toe, its self-advancement destructive force and self-advancement force will be recorded. The self-advancement force is the difference between the self-advancement destructive force and the impact force. During the well washing process, the injection pump 402 will be shut off.

[0082] ⑦ After the well washing is completed, the sand flushing system 301 can be removed from the horizontal well simulation and impact force testing system, and clean water can be injected using the injection pump 402;

[0083] ⑧ Remove the well-washing equipment in functional area 303, open the pipeline end and connect the pump 403 to complete the horizontal well pumping simulation, maintain the system fluid level stability, simulate the horizontal well pumping environment after drilling is completed, and record the Q1 flow rate and P1 pressure data at this time.

[0084] Simulated effects of leaching agent damage and well-washing damage removal:

[0085] ① Assemble the horizontal well simulation and impact force testing system: The horizontal well build-up section 101 is connected to the jet radial pressure testing device through an interface, and the screen pipe 105 is connected to the jet radial pressure testing device through an interface. The jet radial pressure testing device and the screen pipe 105 are connected in the same way in sequence. Finally, the screen pipe 105 is connected to the jet self-advance force and axial pressure testing device through an interface.

[0086] ② Place ore layer rock powder into the ore layer simulation system 200, and bury the horizontal well simulation and impact force testing system in the middle of the rock powder;

[0087] ③ The leaching agent is injected using injection pump 402 to simulate the horizontal well pumping operation environment after drilling and completion; the leaching agent interacts with the ore layer for a relatively long time;

[0088] ④ Functional area 303 is not connected to the well washing equipment. Open the end of the delivery pipeline 302 and connect the pumping pump 403 to complete the horizontal well pumping simulation, maintain the system liquid level stability, and record the Q1 flow rate and P1 pressure data at this time.

[0089] ⑤ Connect the jet nozzle to functional area 303, place the sand flushing system 301 in the horizontal well simulation and impact force testing system, and turn on the injection pump 402 to perform jet flushing; if simulating air flushing, replace it with an air pump, and connect the cavitation device to functional area 303.

[0090] ⑥ During the jet well washing process, the lateral impact force and the axial impact force will be recorded. When the nozzle advances to the horizontal well toe, its self-advancement destructive force and self-advancement force will be recorded. The self-advancement force is the difference between the self-advancement destructive force and the impact force. During the well washing process, the injection pump 402 will be shut off.

[0091] ⑦ After the well washing is completed, the sand flushing system 301 can be removed from the horizontal well simulation and impact force testing system, and clean water can be injected using the injection pump 402;

[0092] ⑧ Remove the well-washing equipment in functional area 303, open the pipeline end and connect the pump 403 to complete the horizontal well pumping simulation, maintain the system fluid level stability, simulate the horizontal well pumping environment after drilling is completed, and record the Q1 flow rate and P1 pressure data at this time.

[0093] Table 1 shows the experimental stable data. The well-washing effect is comprehensively evaluated based on the combined flow rate and pressure parameters, as well as the impact force generated during the well-washing process.

[0094] Table 1

[0095]

[0096] In this application, the term "multiple" refers to two or more unless otherwise expressly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0097] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0098] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A horizontal well washing simulation experimental device, characterized in that, include: A mineral layer simulation system is used to simulate a mineral layer environment. The mineral layer simulation system includes a box with an open top. The inside of the box is filled with mineral layer rock powder to construct a simulated rock layer. Multiple injection ports are provided on the side walls of the box. An impact force testing system, buried in the simulated rock strata, includes a self-advancing force and axial pressure testing device, a radial pressure testing device, and a bent connecting pipe. The self-advancing force and axial pressure testing device and the radial pressure testing device are connected through a screen pipe. The first end of the bent connecting pipe extends into the rock strata and connects to the radial pressure testing device, and the second end protrudes from the open structure of the box. The sand flushing and well washing system is detachably installed inside the bent pipe and is used to connect with the well washing impact force testing system to conduct jet well washing, air well washing and liquid pumping simulation experiments.

2. The horizontal well washing simulation experimental device according to claim 1, characterized in that, The radial pressure testing device includes: A first connecting pipe and a second connecting pipe are axially spaced apart, with the first end of the bent connecting pipe passing through the first connecting pipe. The first test piece is coaxially connected between the first connecting pipe and the second connecting pipe and is used to test the radial pressure of the jet.

3. The horizontal well washing simulation experimental device according to claim 2, characterized in that, The radial pressure testing device is a plurality of devices, which are connected by a sieve tube.

4. The horizontal well washing simulation experimental device according to claim 3, characterized in that, The self-advancing force and axial pressure testing device includes: The third connecting pipe is connected to the radial pressure testing device via the sieve pipe; The second test piece is disposed on the third connecting tube, and the detection direction of the second test piece is perpendicular to the detection direction of the first test piece.

5. The horizontal well washing simulation experimental apparatus according to any one of claims 1 to 4, characterized in that, The sand flushing and well washing system includes: a jet well washing test unit, which includes: The delivery pipeline is installed inside the bent connecting pipe; The injection pump is connected to the inlet end of the delivery pipeline; A jet nozzle is installed at the outlet end of the delivery pipeline to form a jet.

6. The horizontal well washing simulation experimental device according to claim 5, characterized in that, The sand flushing and well washing system further includes: a high-pressure air well washing test unit, which includes: An air pump is connected to the inlet end of the delivery pipeline; A cavitation device, connected to the outlet end of the delivery pipeline, is used to generate a cavitation jet effect.

7. The horizontal well washing simulation experimental device according to claim 5, characterized in that, The sand flushing and well washing system also includes: A liquid pump is used to connect to the inlet end of the pipeline for conducting liquid pumping simulation experiments.

8. The horizontal well washing simulation experimental apparatus according to any one of claims 1 to 4, characterized in that, The enclosure is made of transparent acrylic glass.

9. The horizontal well washing simulation experimental apparatus according to any one of claims 1 to 4, characterized in that, Also includes: An injection pump is connected to multiple injection ports.

10. The horizontal well washing simulation experimental apparatus according to any one of claims 1 to 4, characterized in that, Also includes: The data analysis and processing unit is connected to the impact force testing system and is used to collect and record the test data of the self-advance force, axial pressure testing device and radial pressure testing device, and evaluate the well washing effect based on the test data.

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