Modular evaluation device for the dynamic suspension and transport capacity of proppants

Abstract

The application discloses a kind of proppant dynamic suspension and transport capacity modular evaluation device, including fluid supply assembly, the fluid supply assembly is used to store and supply different flow and different temperature fracturing liquid;Simulated fracture component, the simulated fracture component is used to simulate formation temperature and flow rate environment;And suspension and transport observation component, the suspension transport observation component is used to observe the dynamic suspension and transport process in the fracture channel of simulated fracture component, and used to determine transport rate and draw projection scatter diagram.The evaluation device of the application can accurately simulate the complex fluid flow and fracture environment of formation, so that the evaluation of proppant dynamic suspension and transport capacity is closer to actual situation.

Description

Technical Field

[0001] This invention relates to the field of oil and gas extraction technology, and in particular to a modular evaluation device for the dynamic suspension and transport capacity of proppant. Background Technology

[0002] In hydraulic fracturing operations for oil and gas, the dynamic suspension and migration capabilities of proppant have a crucial impact on fracturing effectiveness and well productivity. Accurately evaluating the dynamic suspension and migration capabilities of proppant under different conditions is of great significance for optimizing fracturing fluid formulations, operational parameters, and improving fracturing results.

[0003] Currently, existing proppant evaluation devices have many shortcomings. Some devices cannot realistically simulate the complex fluid flow and fracture environment of the formation, resulting in a large deviation between the evaluation results and the actual situation. Some devices have limited functions and cannot comprehensively evaluate the dynamic suspension and migration capabilities of proppant, nor can they take into account multi-angle evaluation capabilities. Other devices have complex structures, large size, redundant design, and inconvenient operation, making it difficult to widely promote them in practical applications.

[0004] Therefore, based on the above-mentioned technical problems, those skilled in the art urgently need to develop a modular evaluation device for the dynamic suspension and transport capacity of proppant. Summary of the Invention

[0005] The purpose of this invention is to provide a modular evaluation device for the dynamic suspension and migration capacity of proppant, which can solve the shortcomings of existing proppant evaluation devices in terms of simulating formation conditions, comprehensively evaluating proppant performance, and ease of operation.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] The present invention provides a modular evaluation device for the dynamic suspension and transport capacity of proppant, the evaluation device comprising:

[0008] A fluid supply assembly for storing and supplying fracturing fluids at different flow rates and temperatures;

[0009] A simulated fracture assembly is located downstream of and connected to the fluid supply assembly. This simulated fracture assembly simulates formation temperature and flow velocity environments. The simulated fracture assembly has multiple sampling valves arranged at different locations within the simulated fracture assembly to separate and sample fracturing fluid and its carried proppant at different locations.

[0010] A suspension and transport observation component is used to observe the dynamic suspension and transport process within the crack channel of a simulated crack component, and to determine the transport rate and draw a projection scatter plot.

[0011] The evaluation device also includes a data acquisition, analysis and control component connected to the suspension and movement observation component, which receives and integrates the data signals from the suspension and movement observation component.

[0012] Furthermore, the fluid supply assembly includes:

[0013] Storage tanks; and

[0014] A sand mixing tank connected to the liquid storage tank via a pipeline;

[0015] A heating rod is installed inside the liquid storage tank, and the temperature of the fluid inside the liquid storage tank is adjusted by the heating rod;

[0016] The downstream end of the mixing tank is connected in sequence to a high-pressure pump and a flow regulating valve via a pipeline. The flow regulating valve is used to regulate the liquid flow rate.

[0017] Furthermore, the liquid storage tank and the sand mixing tank are made of stainless steel.

[0018] The volume of the liquid storage tank is 100L, and the volume of the sand mixing tank is 20L;

[0019] The maximum heating temperature of the heating rod in the liquid storage tank is 150°C, and the maximum speed of the agitator in the sand mixing tank is 1200 rpm.

[0020] The flow rate regulating valve has a flow rate regulation range of 0-1 m / s.

[0021] Furthermore, the simulated crack assembly includes:

[0022] Two parallel crack-simulating plates with adjustable relative distance, with a simulated crack channel between the two crack-simulating components;

[0023] Temperature sensors and flow rate sensors are installed in the simulated crack channel. Both the temperature sensors and the flow rate sensors are connected to the data acquisition, analysis and control component to transmit temperature data and flow rate data to the data acquisition, analysis and control component.

[0024] Furthermore, four sampling valves are provided on the crack simulation parallel plate;

[0025] The four sampling valves are respectively arranged at the four corners of the crack simulation parallel plate.

[0026] Furthermore, the crack simulation parallel plate is made of explosion-proof glass, and the light transmittance of the crack simulation parallel plate is greater than 90%.

[0027] The dimensions of the crack simulation parallel plate are 50cm*20cm*0.8cm, and the spacing between the two crack simulation parallel plates ranges from 1mm to 12mm.

[0028] The temperature sensor has a measurement range of 0-150℃;

[0029] The flow velocity sensor has a measurement range of 0-1 m / s;

[0030] The sampling valve has a diameter of 1 cm and is connected to a short pipe.

[0031] Furthermore, the suspension and transport observation component includes:

[0032] A high-speed camera is used to capture the dynamic suspension and migration process of the proppant within the simulated crack channel, and to record the process.

[0033] A laser emitter and a receiver used in conjunction with the laser emitter, the laser emitter and receiver being used to determine the proppant transport rate and to plot a projected scatter plot.

[0034] Furthermore, the high-speed camera has a resolution of 1920*1080 and a frame rate of 300 frames per second.

[0035] The laser emitter has a laser wavelength of 808nm and a power of 10mW-100mW.

[0036] Furthermore, the evaluation device also includes a fluid recovery component downstream of the process;

[0037] The fluid recovery assembly includes:

[0038] Recovery storage tank and filter structure located inside the recovery storage tank.

[0039] Furthermore, the filter structure is a screen;

[0040] The volume of the recovery storage tank is 100L;

[0041] The filter structure uses a sieve with a mesh size of 20, 70, 100, or 200.

[0042] In the above technical solution, the modular evaluation device for dynamic suspension and transport capacity of proppant provided by the present invention has the following beneficial effects:

[0043] The evaluation device of this invention can accurately simulate the complex fluid flow and fracture environment of the formation, making the evaluation of the dynamic suspension and migration capacity of proppant closer to the actual situation; it comprehensively evaluates the dynamic suspension and migration capacity of proppant. The device has a simple structure, is easy to operate, modular and detachable, small in size, and highly reliable, making it easy to be widely used in scientific research and production, and providing accurate experimental basis for optimizing fracturing fluid formulation and construction parameters. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0045] Figure 1 This is a system composition diagram of the modular evaluation device for dynamic suspension and transport capacity of proppant disclosed in the embodiments of this application;

[0046] Figure 2 This is a simulation diagram of a sandbar with low suspension capacity proppant deposition and a scatter plot during the experimental process of the modular evaluation device for dynamic suspension and transport capacity of proppant disclosed in this application.

[0047] Figure 3 This is a simulation diagram of a sandbank with high suspension capacity proppant deposition and a scatter plot during the experimental process of the modular evaluation device for dynamic suspension and transport capacity of proppant disclosed in this application.

[0048] Explanation of reference numerals in the attached figures:

[0049] 1. Fluid supply assembly; 2. Simulated crack assembly; 3. Suspension and transport observation assembly; 4. Data acquisition, analysis and control assembly; 5. Liquid recovery assembly;

[0050] 101. Storage tank; 102. Sand mixing tank; 103. Heating rod; 104. High-pressure pump; 105. Flow regulating valve;

[0051] 201. Parallel plate simulating cracks; 202. Simulated crack channel; 203. Temperature sensor; 204. Flow rate sensor; 205. Sampling valve;

[0052] 301. High-speed camera; 302. Laser transmitter; 303. Receiver;

[0053] 501. Recycled liquid storage tank; 502. Filtration structure. Detailed Implementation

[0054] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0055] See Figures 1 to 3 As shown;

[0056] This embodiment discloses a modular evaluation device for the dynamic suspension and transport capacity of proppant, the evaluation device comprising:

[0057] Fluid supply assembly 1, which is used to store and supply fracturing fluids of different flow rates and temperatures;

[0058] The simulated fracture assembly 2, located downstream of and connected to the fluid supply assembly 1, simulates the formation temperature and flow rate environment. The simulated fracture assembly 2 has multiple sampling valves 205 arranged at different locations to separate and sample the fracturing fluid and its carried proppant at different locations.

[0059] Suspension and transport observation component 3 is used to observe the dynamic suspension and transport process within the crack channel of simulated crack component 2, and to determine the transport rate and draw a projection scatter plot.

[0060] The evaluation device also includes a data acquisition, analysis and control component 4 connected to the suspension and movement observation component 3. The data acquisition, analysis and control component 4 receives and integrates the data signals from the suspension and movement observation component 3.

[0061] Specifically, this embodiment discloses a modular evaluation device for the dynamic suspension and migration capacity of proppant, which mainly includes five modules: a fluid supply component 1, a suspension and migration observation component 3, a data acquisition, analysis and control component 4, a simulated fracture component 2, and a downstream liquid recovery component 5. The fluid supply component 1 stores and supplies fracturing fluids of different flow rates and temperatures, and, under the action of a high-pressure pump 104 and a flow regulating valve 105, delivers liquid at a certain temperature and flow rate to the simulated fracture channel 202 of the simulated fracture component 2 according to the process setting. The simulated fracture component 2 is used to detect temperature and flow rate, while the suspension and migration observation component 3 observes the dynamic suspension and migration process within the fracture channel 202 of the simulated fracture component 2, determines the migration rate, and plots a projection scatter plot. The evaluation device can accurately simulate the complex fluid flow and fracture environment of the formation, making the evaluation of the dynamic suspension and migration capacity of proppant closer to reality.

[0062] Preferably, the fluid supply assembly 1 in this embodiment includes a storage tank 101 and a sand mixing tank 102 connected to the storage tank 101 via a pipeline; a heating rod 103 is provided inside the storage tank 101 to regulate the fluid temperature inside the storage tank 101; a high-pressure pump 104 and a flow regulating valve 105 are connected sequentially to the downstream end of the sand mixing tank 102 via a pipeline, and the flow regulating valve 105 is used to regulate the liquid flow rate.

[0063] In this embodiment, the liquid storage tank 101 and the sand mixing tank 102 are made of stainless steel; the volume of the liquid storage tank 101 is 100L and the volume of the sand mixing tank 102 is 20L.

[0064] The maximum heating temperature of the heating rod 103 in the liquid storage tank 101 is 150℃, and the maximum speed of the agitator in the sand mixing tank 102 is 1200 rpm; the flow rate adjustment range of the flow rate regulating valve 105 is 0-1m / s.

[0065] Preferably, the simulated crack assembly 2 in this embodiment includes two crack simulation parallel plates 201 whose relative distance can be adjusted, and a simulated crack channel 202 is formed between the two crack simulation parallel plates 201.

[0066] A temperature sensor 203 and a flow rate sensor 204 are installed in the simulated crack channel 202. Both the temperature sensor 203 and the flow rate sensor 204 are connected to the data acquisition, analysis and control component 4 to transmit temperature data and flow rate data to the data acquisition, analysis and control component 4.

[0067] Preferably, in this embodiment, four sampling valves 205 are provided on the fracture simulation parallel plate 201; the four sampling valves 205 are respectively arranged at the four corners of the fracture simulation parallel plate 201. The four sampling valves 205 are used to separate and sample the beginning and end of the fracture channel 202, the fracturing fluid in the upper and lower layers and the proppant it carries, so as to measure the dynamic suspension mass ratio of the proppant.

[0068] Preferably, in this embodiment, the crack simulation parallel plate 201 is made of explosion-proof glass, and the light transmittance of the crack simulation parallel plate 201 is greater than 90%; the size of the crack simulation parallel plate 201 is 50cm*20cm*0.8cm, and the distance between the two crack simulation parallel plates 201 is 1mm-12mm; the temperature sensor 203 has a measurement range of 0-150℃; the flow rate sensor 204 has a measurement range of 0-1m / s; the sampling valve 205 has a diameter of 1cm, and the sampling valve 205 is connected to a short pipe.

[0069] Preferably, the suspension and migration observation component 3 of this embodiment includes a high-speed camera 301, which captures the dynamic suspension and migration process of the proppant in the simulated crack channel 202 and records the process; a laser emitter 302 and a receiver 303 used in conjunction with the laser emitter 302, which are used to determine the migration rate of the proppant and to draw a projection scatter plot.

[0070] In this embodiment, the high-speed camera 301 has a resolution of 1920*1080 and a frame rate of 300 frames; the laser emitter 302 has a laser wavelength of 808nm and a power of 10mW-100mW.

[0071] Preferably, the evaluation device in this embodiment further includes a fluid recovery component 5 at the downstream end of the process; the fluid recovery component 5 includes a recovery storage tank 501 and a filter structure 502 located in the recovery storage tank 501.

[0072] The data acquisition, analysis and control component 4 in this embodiment uses a computer.

[0073] Preferably, in this embodiment, the filter structure 502 is a screen; the volume of the recovery storage tank 501 is 100L; and the filter structure 502 uses a screen with a mesh size of 20, 70, 100, or 200.

[0074] During the experiment, the prepared fracturing fluid, such as slickwater or guar gum fracturing fluid, is poured into the storage tank 101, filling it to no less than one-third of the tank volume. Quartz sand or ceramsite proppant is added to the sand mixing tank 102, with a mesh size between 20 and 200 mesh, preferably 100 mesh quartz sand. The mass ratio of proppant to fracturing fluid is between 1:20 and 1:10.

[0075] Next, assemble the fluid supply component 1, simulated crack component 2, suspension and migration observation component 3, data acquisition, analysis and control component 4, and liquid recovery component 5 according to the design requirements, connect the pipes and lines between each component to ensure tight connection and no leakage, and finally turn on the equipment.

[0076] See Figures 2 to 3 As shown, the control module is used to debug the fluid supply module, and the working status of the heating rod 103, high-pressure pump 104, and flow regulating valve 105 is checked to ensure accurate control of the fluid temperature and flow rate. The mixing speed is set to 800 rpm, the heating temperature to 100℃, and the flow rate to 0.5 m / s.

[0077] The temperature and flow rate sensors 204 of the simulated fracture assembly 2 were calibrated to ensure they functioned correctly and accurately measured temperature and flow rate. The adjusting nut was adjusted to change the distance between the two parallel plates to 5 mm. High-speed photography was performed at 300 frames per second and a laser power of 30 mW. After fluid supply began and flow stabilized, the dynamic suspension and migration process of the proppant within the simulated fracture channel 202 was captured in real time, and laser scatter plots were obtained to measure the quartz sand migration velocity.

[0078] In the above technical solution, the modular evaluation device for dynamic suspension and transport capacity of proppant provided by the present invention has the following beneficial effects:

[0079] The evaluation device of this invention can accurately simulate the complex fluid flow and fracture environment of the formation, making the evaluation of the dynamic suspension and migration capacity of proppant closer to the actual situation; it comprehensively evaluates the dynamic suspension and migration capacity of proppant. The device has a simple structure, is easy to operate, modular and detachable, small in size, and highly reliable, making it easy to be widely used in scientific research and production, and providing accurate experimental basis for optimizing fracturing fluid formulation and construction parameters.

[0080] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A modular evaluation device for dynamic suspension and transport capacity of proppant, characterized in that, The evaluation device includes: A fluid supply assembly (1) for storing and supplying fracturing fluids of different flow rates and temperatures; A simulated fracture assembly (2) is located downstream of the fluid supply assembly (1) and communicates with it. The simulated fracture assembly (2) is used to simulate formation temperature and flow rate environments. The simulated fracture assembly (2) has multiple sampling valves (205) arranged at different locations within the simulated fracture assembly (2) to separate and sample fracturing fluid and its carried proppant at different locations. Suspension and transport observation component (3), which is used to observe the dynamic suspension and transport process in the simulated crack channel (202) of the simulated crack component (2), and to determine the transport rate and draw a projection scatter plot; The evaluation device also includes a data acquisition, analysis and control component (4) connected to the suspension and movement observation component (3), which receives and integrates the data signals from the suspension and movement observation component (3).

2. The modular evaluation device for dynamic suspension and transport capacity of proppant according to claim 1, characterized in that, The fluid supply assembly (1) includes: Storage tank (101); and A sand mixing tank (102) is connected to the liquid storage tank (101) via a pipeline; A heating rod (103) is provided inside the liquid storage tank (101) to regulate the fluid temperature inside the liquid storage tank (101); The downstream end of the mixing tank (102) is connected in sequence to a high-pressure pump (104) and a flow regulating valve (105) via a pipeline. The flow regulating valve (105) is used to regulate the liquid flow rate.

3. The modular evaluation device for dynamic suspension and transport capacity of proppant according to claim 2, characterized in that, The liquid storage tank (101) and the sand mixing tank (102) are made of stainless steel; The volume of the liquid storage tank (101) is 100L, and the volume of the sand mixing tank (102) is 20L; The maximum heating temperature of the heating rod (103) in the liquid storage tank (101) is 150°C, and the maximum speed of the stirrer in the sand mixing tank (102) is 1200 rpm; The flow rate regulating valve (105) has a flow rate regulating range of 0-1 m / s.

4. The modular evaluation device for dynamic suspension and transport capacity of proppant according to claim 1, characterized in that, The simulated crack assembly (2) includes: Two crack simulation parallel plates (201) with adjustable relative distance, and a simulated crack channel (202) between the two crack simulation parallel plates (201); A temperature sensor (203) and a flow rate sensor (204) are installed in the simulated crack channel (202). Both the temperature sensor (203) and the flow rate sensor (204) are connected to the data acquisition, analysis and control component (4) to transmit temperature data and flow rate data to the data acquisition, analysis and control component (4).

5. The modular evaluation device for proppant dynamic suspension and transport capacity according to claim 4, characterized in that, The crack simulation parallel plate (201) is equipped with four sampling valves (205); The four sampling valves (205) are respectively arranged at the four corners of the crack simulation parallel plate (201).

6. The modular evaluation device for proppant dynamic suspension and transport capacity according to claim 4, characterized in that, The crack simulation parallel plate (201) is made of explosion-proof glass, and the light transmittance of the crack simulation parallel plate (201) is greater than 90%. The dimensions of the crack simulation parallel plate (201) are 50cm*20cm*0.8cm, and the spacing between the two crack simulation parallel plates (201) is 1mm-12mm. The temperature sensor (203) has a measurement range of 0-150℃; The flow velocity sensor (204) has a measurement range of 0-1 m / s; The sampling valve (205) has a diameter of 1 cm and is connected to a short pipe.

7. The modular evaluation device for dynamic suspension and transport capacity of proppant according to claim 1, characterized in that, The suspension and movement observation component (3) includes: A high-speed camera (301) is used to capture the dynamic suspension and movement of the proppant within the simulated crack channel (202) and to record the process. A laser emitter (302) and a receiver (303) used in conjunction with the laser emitter (302) are used to determine the proppant transport rate and to plot a projection scatter plot.

8. The modular evaluation device for dynamic suspension and transport capacity of proppant according to claim 7, characterized in that, The high-speed camera (301) has a resolution of 1920*1080 and a frame rate of 300 frames. The laser emitter (302) has a laser wavelength of 808nm and a power of 10mW-100mW.

9. The modular evaluation device for dynamic suspension and transport capacity of proppant according to claim 1, characterized in that, The evaluation device also includes a fluid recovery assembly (5) at the downstream end of the process; The fluid recovery assembly (5) includes: Recovery storage tank (501) and filter structure (502) located inside recovery storage tank (501).

10. The modular evaluation device for proppant dynamic suspension and transport capacity according to claim 9, characterized in that, The filter structure (502) is a sieve; The volume of the recovery storage tank (501) is 100L; The filter structure (502) uses a sieve with a mesh size of 20, 70, 100 or 200.

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