Visual microfluidic test equipment for gas-water-oil-solid-green multiphase and multicomponent fluid

Abstract

The invention discloses gas-water-oil-solid-green multiphase and multicomponent fluid visual microfluidic test equipment. The gas-water-oil-solid-green multiphase and multicomponent fluid visual microfluidic test equipment comprises a fluid injection device and a test platform which are sequentially connected through a pipeline, wherein the fluid injection device comprises a test pump; a micro-flow control chip is mounted on the test platform; and the test pump is connected with the micro-flow control chip through a pipeline. According to the device, the migration law of fluids with different gas-water-oil-solid biological proportions and different chemical components in pipelines, pores and fractures in a test and the particulate matter carrying capacity under the conditions of different bubble apparent volume proportions, different flow speeds, different surfactants and different component fluids can be observed in real time through the micro-fluidic chip. When the testing device is used for testing, the fluid in the micro-fluidic chip can be observed by means of the microscope, the original testing environment is restored to the maximum extent, the moving direction and the flowing interface of the fluid during testing can be clearly observed, and the testing dynamic state can be dynamically monitored in real time.

Description

Technical Field

[0001] The invention relates to the technical field of multiphase flow research devices, and more specifically to a visualized microfluidic test device for gas-water-oil-solid-biomass multiphase and multicomponent fluids. Background Art

[0002] Multiphase flow experiments are an important means of studying the behavior of multiple fluid phases (such as gas, liquid, solid) under complex flow conditions. They are usually carried out in various simulation experiments in the laboratory. However, the current technology still has some challenges and shortcomings, mainly including:

[0003] The existing technology is generally a two-phase fluid or three-phase fluid flow test platform, which cannot achieve stable injection of multiphase mixed fluids and cannot use multiphase mixed fluids for testing;

[0004] Poor visualization: The flow direction and flow state of the fluid in the complex flow channel of the device during the test are usually difficult to observe. Complex interactions between multiphase fluids: The complex interactions between different phases of fluids (such as gas-liquid, solid-liquid) make the flow behavior difficult to predict and simulate, and direct observation is required. For example, the generation, merging and separation of bubbles and droplets have an important influence on the flow performance, but these processes are difficult to fully simulate in the experiment. The composition of the fluid, especially the components of the mixed phase fluid, is difficult to monitor in real time;

[0005] Lack of dynamic monitoring capabilities: In multiphase flow experiments, it is necessary to monitor the distribution, velocity, concentration and other parameters of each phase in real time to obtain dynamic information during the flow process. However, the application of real-time monitoring technology still has certain limitations;

[0006] Difficulty in simulating flow interfaces: The interfaces between fluids are in an unstable state, especially in high-speed flows or complex geometries. Accurate simulation and prediction of these flow interfaces is a challenge.

[0007] Differences between experimental conditions and field environments: Multiphase flow tests under laboratory conditions are difficult to fully simulate the complex conditions in real industrial environments, such as high pressure, high temperature, and non-uniform geological conditions, which will affect the applicability and promotion of test results;

[0008] Model verification and acquisition of verification data: The complexity of multiphase flow makes it difficult to verify numerical simulation and experimental data. A large amount of experimental data is required to verify the accuracy and reliability of the model.

[0009] To solve these problems, it is necessary to develop more advanced experimental techniques and equipment, such as high-precision sensors, real-time data processing technology, and accurate numerical simulation methods, in order to improve the accuracy, repeatability, and applicability of multiphase flow experiments for field applications. Summary of the invention

[0010] In view of this, the present invention provides a visualized microfluidic test device for gas-water-oil-solid-biomass multiphase and multicomponent fluids.

[0011] To achieve the above object, the present invention adopts the following technical solutions:

[0012] A visualized microfluidic test device for gas-water-oil-solid-organic multiphase and multicomponent fluids, comprising a fluid injection device and a test platform connected in sequence through pipelines:

[0013] The fluid injection device includes a test pump;

[0014] A micro-flow control chip is installed on the test platform;

[0015] The test pump is connected to the micro flow control chip through the pipeline.

[0016] Preferably, the test pump can be a flow pump, a pressure pump, etc.;

[0017] Preferably, it further comprises a relay container, in which a stirrer is arranged, the fluid injection device is connected with the inlet of the relay container through the pipeline, and the micro-flow control chip is connected with the outlet of the relay container through the pipeline.

[0018] Furthermore, the micro-flow control chip is provided with a plurality of fluid injection holes, and the test pump and the relay container are respectively connected to the fluid injection holes.

[0019] Preferably, it also includes a displacement test device, which uses a related microflow control chip to simulate the internal passage of the displacement test device (that is, related to the internal structure of the displacement test body. If the displacement body is a homogeneous rock sample, the fluid channels of the microfluidic chip structure should be evenly distributed; if it is a broken zone rock sample, the internal structure of the microfluidic chip has various irregular passages in different directions), and a fluid discharge hole is provided on the microflow control chip, and the displacement test device is connected to the fluid discharge hole through the pipeline.

[0020] Furthermore, the displacement test device includes a test body holder and a displacement test body, and the displacement test body is installed through the test body holder.

[0021] Furthermore, the displacement test device is connected to a front-end pressure gauge and a rear-end pressure gauge at both ends to test the breakthrough pressure of the configured gas / liquid / solid mixed fluid with different components in the same formation.

[0022] Furthermore, it also includes a waste liquid collection device, which is connected to the displacement test body through a pipeline.

[0023] Preferably, the fluid channels in the microflow control chip include one or more of Y-type, grid type, and multi-layer stacking type, but are not limited thereto, and can simulate strata and reservoir / cap strata at different depths, and test the migration capacity of fluids in multiple continuous strata.

[0024] Preferably, it also includes a waste liquid composition analysis system, such as a water quality analyzer, a chromatograph, etc., to analyze the changes in the composition of the injected fluid before and after the test, to understand the flow patterns of fluids with different compositions under the same formation conditions and fluids with the same composition under different formation conditions, as well as their carrying capacity, reaction capacity and migration capacity for substances in the formation.

[0025] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a visualized microfluidic test device for gas-water-oil-solid-organic multiphase and multicomponent fluids, which has the following beneficial effects:

[0026] Through the microfluidic chip, the migration laws of different gas-water-oil-solid-biological ratios and different chemical composition fluids in pipelines, pores and cracks in the test can be observed in real time, as well as the particle carrying capacity under different bubble apparent volume ratios, different flow rates, and different surfactant conditions; the pressure of the test fluid before it is injected into the microfluidic chip and the pressure feedback after it is injected into the displacement test device are controlled by the test pump, which is more accurate and stable. That is, when using this test device, the fluid in the microfluidic chip can be observed with the help of a microscope during the test, and the original test environment can be restored to the maximum extent. The movement direction and flow interface of the fluid during the test can be clearly observed, and the test dynamics can be monitored in real time. The flow rate of the fluid in the test device is controlled and adjusted by the test pump, which can finely adjust the flow rate of the multiphase fluid in the relay container, and the pressure feedback is performed through the fluid flow rate, and then transported to the micro-flow control chip by the relay container. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0028] Figure 1 This is an overall structural diagram of a visualized microfluidic test device for gas-water-oil-solid-organic multiphase and multicomponent fluids of the present invention;

[0029] Figure 2-4 It is the structural diagram of the micro flow control chip;

[0030] Figure 5 This is the structural diagram of the displacement test device;

[0031] In the figure, 1-fluid injection device, 11-pump No. 1, 12-pump No. 2, 13-pump No. 3, 2-relay container, 21-stirring device, 3-test platform, 4-micro flow control chip, 41-fluid injection hole, 42-fluid discharge hole, 43-fluid channel, 431-first fluid channel, 432-second fluid channel, 433-third fluid channel, 5-displacement test device, 50-test body clamp, 51-front end pressure gauge, 52-rear end pressure gauge, 53-displacement test body, 6-pipeline, 7-waste liquid collection device. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] As attached Figure 1 The visualized microfluidic test equipment for gas-water-oil-solid-raw multiphase and multicomponent fluids comprises a fluid injection device 1 and a test platform 3 connected in sequence through a pipeline 6, wherein the fluid injection device 1 comprises a test pump; according to experimental requirements, multiple test pumps can be provided, and three are provided in this embodiment, but not limited thereto. Taking this embodiment as an example, the three test pumps are respectively a No. 1 pump 11, a No. 2 pump 12, and a No. 3 pump 13; a microflow control chip 4 is installed on the test platform 3; according to experimental requirements, multiple fluid injection holes 41 can be provided on the microflow control chip 4, and two are provided in this embodiment;

[0034] In some more improved technical solutions, a relay container 2 is further included, wherein a stirrer 21 is provided in the relay container 2, the fluid injection device 1 is connected to the inlet of the relay container 2 through the pipeline 6, and the fluid injection hole 41 provided on the micro-flow control chip 4 is connected to the outlet of the relay container 2 through the pipeline 6;

[0035] As attached Figure 1 As shown, in this embodiment, two fluid injection holes 41 are provided, one of which is connected to the relay container 2 through the pipeline 6, the first pump 11 and the second pump 12 are connected to the relay container 2 through the pipeline, and the third pump 13 is directly connected to the other fluid injection hole 41 through the pipeline, but the connection method is not limited to this, and can be configured according to different experimental requirements based on the inventive concept of the present invention;

[0036] In some more improved technical solutions, a displacement test device 5 is also included, such as Figure 5As shown, the replacement test device 5 includes a test body holder 50 and a displacement test body 53. The displacement test body 53 is installed through the test body holder 50. The displacement test body 53 includes a porous tube, a core, a pipeline, etc. A fluid discharge hole 42 is provided on the micro-flow control chip 4. The displacement test body 53 is connected to the fluid discharge hole 42 through the pipeline 6, and the front and rear ends of the replacement test device 5 connected to the pipeline 6 are respectively connected with a front pressure gauge 51 and a rear pressure gauge 52 to test the breakthrough pressure of the fluid in the displacement test body 53.

[0037] In some more improved technical solutions, a waste liquid collecting device 7 is further included, and the waste liquid collecting device 7 is connected to the displacement test device 5 through a pipeline 6.

[0038] In some more improved technical solutions, the fluid channels in the micro-flow control chip 4 include Y-shaped, U-shaped, grid-shaped, circular, multi-layer stacked (such as the attached Figure 2-4 As shown), but not limited thereto, specific selection can be made according to experimental requirements.

[0039] The application principle of the present invention is: the fluid injection device 1 injects the test fluid into the test device, and controls the test fluid pressure by controlling the flow rate of the injected fluid. Different pumps can be used according to the differences in the phase state and components of the fluid, and the number is not limited, such as pump No. 1, pump No. 2, pump No. 3..., pump No. N, etc. The fluid of the fluid injection device 1 can be injected into the relay device 2 through the connecting pipe 6 and then injected into the micro-flow control chip 4 in the test platform 3, or it can be directly injected into the micro-flow control chip 4 through the connecting pipe 6; some injected fluids need to be configured in proportion and fully mixed, such as mixed solutions, solid-liquid mixtures, water-oil mixtures and other solutions need to be stirred and mixed using the stirring device 21 in the relay container 2; the micro-flow control chip 4 is clamped and fixed on the test platform 3, and the fluid flow in the chip channel is observed using a microscope or other equipment; some tests have displacement test requirements It is necessary to add a displacement test device 5. The displacement test body 53 in the displacement test device 5 can be a core, a formation model, a porous tube, a pipeline, etc., and its size is determined according to the test type. By observing the fluid flow in the microfluidic chip 4 matched with the displacement test device 5, the flow mode of the multiphase mixed fluid in the displacement fluid 4 can also be understood; the fluid in the microflow control chip 4 flows through the fluid channel 43 and is discharged from the fluid discharge hole 42 through the connecting pipeline 6 to connect to the displacement test device 5, and the outlet of the displacement test device 5 is connected to the waste liquid collection device 7 to collect the outflowing fluid.

[0040] The connecting pipeline can be a metal or plastic pipeline, connecting various functional sub-modules such as the fluid injection device 1, the relay container 2, the micro-flow control chip 4, the displacement test device 5 (porous medium, pipeline, formation rock sample), and the waste liquid collection device 7, so that the fluid can flow between the modules.

[0041] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0042] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A visual microfluidic test device for gas-water-oil-solid-organic multiphase and multicomponent fluids, characterized in that: It includes a fluid injection device and a test platform connected in sequence through pipelines: The fluid injection device includes a test pump; A micro-flow control chip is installed on the test platform; The test pump is connected to the micro flow control chip through the pipeline.

2. A visualized microfluidic test device for gas-water-oil-solid-organic multiphase and multicomponent fluids according to claim 1, characterized in that: It also includes a relay container, in which a stirrer is arranged, the fluid injection device is connected with the inlet of the relay container through the pipeline, and the micro flow control chip is connected with the outlet of the relay container through the pipeline.

3. A visualized microfluidic test device for gas-water-oil-solid-organic multiphase and multicomponent fluids according to claim 2, characterized in that: The micro-flow control chip is provided with a plurality of fluid injection holes, and the test pump and the relay container are respectively connected with the fluid injection holes.

4. A visualized microfluidic test device for gas-water-oil-solid-organic multiphase and multicomponent fluids according to claim 1, characterized in that: It also includes a displacement test device, which uses a related micro-flow control chip to simulate the internal passage of the displacement test device. The micro-flow control chip is provided with a fluid discharge hole, and the displacement test device is connected to the fluid discharge hole through the pipeline.

5. A visualized microfluidic test device for gas-water-oil-solid-organic multiphase and multicomponent fluids according to claim 4, characterized in that: The displacement test device comprises a test body holder and a displacement test body, and the displacement test body is installed through the test body holder.

6. The visualized microfluidic test equipment for gas-water-oil-solid-organic multiphase and multicomponent fluids according to claim 4, characterized in that: The two ends of the displacement test device are respectively connected with a front-end pressure gauge and a rear-end pressure gauge.

7. A visualized microfluidic test device for gas-water-oil-solid-organic multiphase and multicomponent fluids according to claim 4, characterized in that: It also includes a waste liquid collection device, which is connected to the displacement test body through a pipeline.

8. The visualized microfluidic test device for gas-water-oil-solid-organic multiphase and multicomponent fluids according to claim 1, characterized in that: The fluid channels in the micro-flow control chip include one or more of a Y-type, a grid-type, and a multi-layer stacking type.

9. The visualized microfluidic test device for gas-water-oil-solid-organic multiphase and multicomponent fluids according to claim 1, characterized in that: Also includes a waste liquid composition analysis system.

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