CN113984583B - Self-generated foam system performance testing device and performance evaluation method - Google Patents
Self-generated foam system performance testing device and performance evaluation method Download PDFInfo
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- 239000006260 foam Substances 0.000 title claims abstract description 118
- 238000012360 testing method Methods 0.000 title claims abstract description 31
- 238000011156 evaluation Methods 0.000 title claims abstract description 26
- 238000001514 detection method Methods 0.000 claims abstract description 69
- 238000004088 simulation Methods 0.000 claims description 58
- 239000011521 glass Substances 0.000 claims description 39
- 239000011435 rock Substances 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 22
- 239000003814 drug Substances 0.000 claims description 19
- 238000005530 etching Methods 0.000 claims description 16
- 230000035699 permeability Effects 0.000 claims description 14
- 238000005086 pumping Methods 0.000 claims description 11
- 238000004364 calculation method Methods 0.000 claims description 7
- 238000012800 visualization Methods 0.000 claims description 7
- 238000004458 analytical method Methods 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 238000012854 evaluation process Methods 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 230000032696 parturition Effects 0.000 claims description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 22
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 18
- 235000019270 ammonium chloride Nutrition 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 10
- 238000006073 displacement reaction Methods 0.000 description 9
- 235000010288 sodium nitrite Nutrition 0.000 description 9
- 239000004088 foaming agent Substances 0.000 description 8
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- 230000008569 process Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000013012 foaming technology Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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- 239000004094 surface-active agent Substances 0.000 description 1
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N13/02—Investigating surface tension of liquids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N13/02—Investigating surface tension of liquids
- G01N2013/0241—Investigating surface tension of liquids bubble, pendant drop, sessile drop methods
- G01N2013/025—Measuring foam stability
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Abstract
The invention discloses a device for testing the performance of a self-generated foam system and a performance evaluation method, the device comprises a power source, an intermediate container, an analog detection unit and a back pressure device which are sequentially communicated, a first valve is arranged at the front end of the back pressure device, the analog detection unit comprises three groups, a series pipeline is arranged between the three groups of analog detection units, branch pipelines are respectively arranged between the first group of analog detection units and the second group of analog detection units, and between the second group of analog detection units and the third group of analog detection units, the tail ends of the branch pipelines are respectively communicated with the first valve, the branch pipelines are respectively provided with a second valve and a third valve, and the analog detection units are respectively electrically connected with a computer. The device can effectively solve the problem that the existing device is not suitable for detecting the self-generated foam system.
Description
Technical Field
The invention belongs to the technical field of a self-generated foam system performance testing device, and particularly relates to a self-generated foam system performance testing device and a performance evaluation method.
Background
The foam fluid is more and more widely applied in petroleum development and plays an important role in drilling, fracturing, acidizing, plug removal, profile control, oil displacement and other aspects. The characteristics of large blockage, small blockage and water and oil blockage are obvious for improving the liquid production profile of the heterogeneous oil reservoir, reducing the water content, improving the displacement efficiency of the medium-low permeability reservoir and improving the recovery ratio. However, in the offshore oil field exploitation process, the offshore platform is restricted by factors such as space and safety, and nitrogen production equipment is not popularized in a large scale. The autogenous foam technology is a technology for generating gas by a chemical method and further forming foam under the action of a foaming agent, has the advantages of no need of nitrogen making equipment, lower injection pressure and wide application in offshore platforms in recent years.
The conventional foam evaluation methods mainly include a stirring method and an infiltration method. The stirring method is widely applied to foam fluid evaluation, mainly comprises the step of stirring a foaming agent solution at a certain rotating speed, and has certain value on a conventional foam system, wherein evaluation indexes are foaming volume and half-life period. The seepage method is mainly used for evaluating the flowing performance of the foam stratum, foam is injected into a rock core with certain permeability for evaluation, and evaluation indexes are resistance factors and the like. The two methods are basic methods for evaluating the foam system and are effective for screening the conventional foam system. However, due to the characteristics of the self-generated foam system, the conventional method is not applicable, firstly, the stirring method has no assistance to the process of automatically generating the foam by chemical reaction, and secondly, for the stratum seepage process, the foam generated in the chemical reaction process of the self-generated foam system in the stratum has a resistance factor with large change, and the conventional evaluation index is difficult to define the advantages and disadvantages.
In order to better utilize the performance of the foam fluid to increase oil and increase yield of an offshore platform, a performance evaluation device and method suitable for a self-generated foam system are urgently needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a device for testing the performance of a self-generated foam system and a performance evaluation method, and the device can effectively solve the problem that the existing device is not suitable for detecting the self-generated foam system.
In order to achieve the purpose, the technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a from foam system capability test device, including the power supply that communicates in proper order, the intermediate container, simulation detecting element and back pressure device, the back pressure device front end is provided with first valve, simulation detecting element includes three groups, be provided with the series pipeline between the three analog detecting element of group, between first analog detecting element of group and the second analog detecting element of group, be provided with the branch pipeline between the second analog detecting element of group and the third analog detecting element of group respectively, the end of branch pipeline communicates with first valve respectively, be provided with second valve and third valve on the branch pipeline respectively, simulation detecting element respectively with computer electrical connection.
In the above scheme, the power source is the plunger pump, and the bottom and the plunger pump of middle container communicate with each other, provide power through the plunger pump and pump out the raw materials in the middle container, and the experiment of being convenient for goes on. The first valve, the second valve and the third valve are all set as needle valves, and the back pressure device is a back pressure valve and is used for controlling the back pressure; and a liquid collecting container is arranged at the lower part of the back pressure valve and is used for collecting the foam liquid after the test.
Further, the simulation detection unit comprises a needle valve, a core holder and a high-pressure visualization unit which are sequentially communicated.
Further, the high-voltage visualization unit comprises a camera, etched glass and a light source which are sequentially arranged from top to bottom, and the camera is electrically connected with the computer.
In the above scheme, the camera uses a high-definition camera for collecting foam conditions on the etched glass in real time, and the light source is arranged at the lower part of the etched glass for supplementing light and improving the definition of images collected by the camera.
Furthermore, a cavity is arranged in the middle of the etching glass, and an inlet and outlet channel is respectively arranged at two ends of the cavity.
In the above scheme, the cavity is used for the foam that the splendid attire formed, and after the foam got into the cavity, discharge gradually under the effect of power supply, in the different time that the foam formed, the foam form and the size that form in the cavity are different, consequently, can be according to the foam state evaluation this from giving birth to the performance of foam system that the camera was gathered.
Further, the cavity is square in shape.
Furthermore, transparent extrusion plates are respectively arranged on the upper side and the lower side of the etched glass, and the transparent extrusion plates are fixedly connected through bolts.
In the scheme, the pressure resistance of the etched glass is limited, and the transparent extrusion plate is arranged outside the etched glass, so that the etched glass can be extruded, and the risk of breakage of the etched glass is reduced.
Furthermore, two groups of power sources and two groups of middle containers are respectively arranged, and the power sources are connected with the middle containers in pairs.
A whole-process performance and fractal evaluation method for displacement of a self-generated foam system is characterized in that the test device is adopted for test evaluation, and the specific test evaluation process is as follows:
(1) respectively filling prepared self-generated foam agents into two intermediate containers, and respectively filling three rock cores with the same permeability and pore structure into three rock core holders;
(2) simultaneously opening needle valves and first valves on the three groups of analog detection units, closing a second valve and a third valve, respectively pumping out the medicaments in the middle container through a power source, sequentially entering each group of analog detection units after the medicaments are converged, respectively recording foam images of foams in each group of etched glass through a camera, and transmitting the foam images to a computer for storage;
(3) and carrying out binarization processing on the foam images acquired by each group of cameras at the same moment, carrying out fractal dimension calculation on the processed images, and obtaining the whole displacement performance of the self-generated foam system through a fractal dimension value.
The method for comprehensively analyzing the self-generated foam system and evaluating the fractal adopts the testing device to carry out testing evaluation, and the specific testing evaluation process comprises the following steps:
(1) respectively filling prepared self-generated foam agents into two intermediate containers, and respectively filling three rock cores with the same permeability and pore structure into three rock core holders;
(2) the first test: opening needle valves, first valves and second valves on the first group of simulation detection units, closing needle valves and third valves on the other two groups of simulation detection units, respectively pumping out the medicaments in the middle container through a power source, enabling the medicaments to enter the first group of simulation detection units after being converged, recording foam images of foams in the first group of etched glass through a camera, and transmitting the foam images to a computer for storage;
(3) and (3) second test: opening needle valves, a first valve and a third valve on the first group of analog detection units and the second group of analog detection units, closing the needle valves on the second valve and the third group of analog detection units, respectively pumping out the medicaments in the middle container through the power source, enabling the medicaments to enter the first group of analog detection units and the second group of analog detection units in sequence after the medicaments are converged, recording foam images of foam in the first group of etched glass and the second etched glass through the camera, and transmitting the foam images to the computer for storage;
(4) and (3) testing for the third time: opening needle valves and first valves on the first group of simulation detection units, the second group of simulation detection units and the third group of simulation detection units, closing the second valves and the third valves, respectively pumping out the medicaments in the middle container through a power source, enabling the medicaments to enter the first group of simulation detection units, the second group of simulation detection units and the third group of simulation detection units in sequence after the medicaments are converged, recording foam images of foams in the first group of etching glass, the second group of etching glass and the third group of etching glass through cameras, and transmitting the foam images to a computer for storage;
(5) changing the rock cores with different permeability and pore structures, repeating the operations in the steps (2), (3) and (4), collecting foam images, carrying out binarization processing on the foam images collected in the steps (2), (3) and (4) of the different rock cores, carrying out fractal dimension calculation on the processed images, and obtaining the influence of the different rock core lengths and permeability on the performance of the self-generated foam system through fractal dimension values.
The beneficial effect that above-mentioned scheme produced does:
1. the device system is through collecting the image of record foam, through handling the image, has realized the test of the whole process of full aspect of authigenic foam system performance and seepage flow law, has with strong points, the advantage that the testing face is wide, and the device is applicable in the performance detection of multiple authigenic foam system, has the advantage that the application is wide.
2. The device disclosed by the invention is simple in structure and easy to realize, and provides a suitable way for evaluating the properties of the foam and related complex fluid of the offshore oil platform.
3. The method directly analyzes the change of the foam structure based on the fractal theory, constructs a micro and macro bridge of the foam, improves the accuracy of the evaluation result, and makes up the defects of the conventional evaluation method.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of etched glass;
FIG. 3 is a diagram showing the relationship between the position of the etching glass and the light source;
FIG. 4 is a schematic diagram showing the change of foam morphology at 10min of reaction;
reference numerals: 1. a power source; 2. an intermediate container; 3. a back pressure device; 4. a first valve; 5. a second valve; 6. a third valve; 7. a computer; 8. a needle valve; 9. a core holder; 10. a high pressure visualization unit; 11. a camera; 12. etching the glass; 13. a light source; 14. a cavity; 15. a transparent extrusion plate;
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
In an embodiment of the present invention, as shown in fig. 1 to 4, a device for testing the performance of a self-generated foam system is provided, which includes a power source 1, an intermediate container 2, a simulation detection unit and a back pressure device 3, which are sequentially connected, and optimally, two sets of power sources 1 and two sets of intermediate containers 2 are respectively provided, and the power sources 1 and the intermediate containers 2 are connected in pairs.
The front end of the back pressure device 3 is provided with a first valve 4, the simulation detection units comprise three groups, series pipelines are arranged among the three groups of simulation detection units, branch pipelines are respectively arranged between the first group of simulation detection units and the second group of simulation detection units and between the second group of simulation detection units and the third group of simulation detection units, the tail ends of the branch pipelines are respectively communicated with the first valve 4, the branch pipelines are respectively provided with a second valve 5 and a third valve 6, and the simulation detection units are respectively electrically connected with a computer 7. Optimally, the simulation detection unit comprises a needle valve 8, a core holder 9 and a high-pressure visualization unit 10 which are sequentially communicated. Optimally, the high-voltage visualization unit 10 comprises a camera 11, an etching glass 12 and a light source 13 which are arranged in sequence from top to bottom, and the camera 11 is electrically connected with the computer 7. Optimally, the middle part of the etching glass 12 is provided with a cavity 14, and both ends of the cavity 14 are respectively provided with an access passage. Optimally, the cavity 14 is square in shape. Optimally, transparent extrusion plates 15 are respectively arranged on the upper side and the lower side of the etched glass 12, and the transparent extrusion plates 15 are fixedly connected through bolts.
The whole displacement performance and fractal evaluation method for the self-generated foam system by adopting the device comprises the following steps: (1) respectively filling prepared self-generated foam reagents of ammonium chloride and sodium nitrite into two intermediate containers, wherein a foaming agent SDS is also added into the intermediate container for containing the ammonium chloride, three rock cores with the permeability of 2000mD are respectively filled into three rock core holders, the length of each rock core holder is 30cm, and the front, middle and rear sections of a displacement stratum are simulated through the rock cores in the rock core holders;
(2) placing the three groups of simulation detection units in a thermostat, simulating the chemical reaction temperature at the constant temperature of 60 ℃, simultaneously opening needle valves and first valves on the three groups of simulation detection units during detection, closing a second valve and a third valve, respectively pumping out ammonium chloride and sodium nitrite in an intermediate container from the intermediate container at the speed of 0.3mL/min by a plunger pump, wherein the pumping-out amount is 2PV, the ammonium chloride and the sodium nitrite are converged and then sequentially enter each group of simulation detection units, the ammonium chloride and the sodium nitrite are subjected to chemical reaction in a rock core to generate foam under the action of a foaming agent, respectively recording foam images of the foam in each group of etched glass by a camera, and transmitting the foam images to a computer for storage;
(3) carrying out binarization processing on the foam images acquired by each group of cameras at the same moment, and carrying out fractal dimension calculation on the processed images, wherein the fractal dimension calculation adopts a box dimension method and obtains the displacement whole-process performance of a self-generated foam system through a fractal dimension numerical value; the larger the fractal dimension value is, the more dispersed the foam structure is represented, the worse the performance is, the smaller the fractal dimension is, the more uniform the foam is represented, and the better the performance is. The fractal dimensions of different sections at the same time reflect the change of the foam structure along the way in the whole displacement process, and the fractal dimensions of different sections at the same time reflect the change of the foam structure along with the displacement time. And analyzing to obtain the performance change characteristics of the whole foam seepage process.
The device is adopted to carry out all-around analysis and fractal evaluation on the self-generated foam system, and the specific test and evaluation process is as follows:
(1) respectively filling prepared self-generated foam reagents of ammonium chloride and sodium nitrite into two intermediate containers, wherein a foaming agent SDS is also added into the intermediate container for containing the ammonium chloride, and respectively filling three rock cores with the same permeability of 2000mD into three rock core holders;
(2) placing the three groups of simulation detection units in a constant temperature box, and simulating the chemical reaction temperature under the constant temperature condition of 60 ℃; the first test: opening needle valves, first valves and second valves on the first group of simulation detection units, closing needle valves and third valves on the other two groups of simulation detection units, respectively pumping out ammonium chloride and sodium nitrite in the middle container from the middle container at the speed of 0.3mL/min through a plunger pump, wherein the pumping-out amount is 2PV, enabling the chemicals to enter the first group of simulation detection units after being converged, enabling the chemicals to generate chemical reaction in a rock core, generating foam under the action of a foaming agent, recording foam images of the foam in the first group of etched glass through a camera, and transmitting the foam images to a computer for storage;
(3) and (3) second test: opening needle valves, a first valve and a third valve on the first group of simulation detection units and the second group of simulation detection units, closing the needle valves on the second valve and the third group of simulation detection units, respectively pumping out ammonium chloride and sodium nitrite in the middle container from the middle container at the speed of 0.3mL/min through a plunger pump, wherein the pumping-out amount is 2PV, the chemicals are converged and then sequentially enter the first group of simulation detection units and the second group of simulation detection units, the two units generate chemical reaction in a rock core, foam is generated under the action of a foaming agent, foam images of the foam in the first group of etching glass and the second etching glass are recorded through a camera, and the foam images are transmitted to a computer for storage;
(4) and (3) testing for the third time: opening needle valves and first valves on the first group of simulation detection units, the second group of simulation detection units and the third group of simulation detection units, closing the second valve and the third valve, respectively pumping out ammonium chloride and sodium nitrite in the middle container from the middle container at the speed of 0.3mL/min through a plunger pump, wherein the pumping-out amount is 2PV, after being converged, the medicaments sequentially enter the first group of simulation detection units, the second group of simulation detection units and the third group of simulation detection units, the ammonium chloride and the sodium nitrite are subjected to chemical reaction in a rock core, foam is generated under the action of a foaming agent, foam images of the foam in the first group of etching glass, the second group of etching glass and the third group of etching glass are recorded through a camera, and the foam images are transmitted to a computer for storage;
(5) changing a rock core with the permeability of 500mD, repeating the operations in the steps (2), (3) and (4), collecting foam images, carrying out binarization processing on the foam images acquired in the steps (2), (3) and (4) on different rock cores, carrying out fractal dimension calculation on the processed images, wherein the fractal dimension calculation adopts a box dimension method, and obtaining the influence of different rock core lengths and permeabilities on the performance of a self-generated foam system through fractal dimension values, wherein the larger the fractal dimension, the more dispersed the representative foam structure, the poorer the performance, the smaller the fractal dimension, the more uniform the representative foam, and the better the performance. And (3) comprehensively analyzing influence factors of foam seepage by comparing influences of different core lengths and permeabilities on the fractal dimension of the foam.
The above apparatus is not limited to the measurement of the properties of the above self-generating foam systemTo produce N 2 And CO 2 Both gas two-liquid chemical systems and different surfactant systems are suitable.
Fig. 4 is a state diagram of foams in three groups of etched glass when the reaction is carried out for 10min, and it can be seen that the fractal dimension of the front section of the core is large, a good foam form is not formed yet, the fractal dimension of the middle region is small, a good-performance foam is formed, the fractal dimension of the rear section region is slightly large, and the foam structure gradually becomes poor.
Claims (5)
1. The utility model provides a from giving birth to foam system all-round analysis and fractal evaluation method, its characterized in that adopts following testing arrangement to test the evaluation, testing arrangement includes power supply (1), middle container (2), simulation detecting element and back pressure device (3) that communicate in proper order, the front end of back pressure device (3) is provided with first valve (4), simulation detecting element includes three groups, be provided with the series pipeline between three groups of simulation detecting element, be provided with branch pipeline between first group simulation detecting element and the second group simulation detecting element, between the second group simulation detecting element and the third group simulation detecting element respectively, the terminal of branch pipeline respectively with first valve (4) intercommunication, be provided with second valve (5) and third valve (6) on the branch pipeline respectively, simulation detecting element respectively with computer (7) electric connection, the simulation detection unit comprises a needle valve (8), a rock core holder (9) and a high-pressure visualization unit (10) which are sequentially communicated, the high-pressure visualization unit (10) comprises a camera (11), etched glass (12) and a light source (13) which are sequentially arranged from top to bottom, and the camera (11) is electrically connected with the computer (7);
the specific test evaluation process comprises the following steps:
(1) respectively filling prepared self-generated foam agents into two intermediate containers, and respectively filling three rock cores with the same permeability and pore structure into three rock core holders;
(2) the first test: opening needle valves, first valves and second valves on the first group of simulation detection units, closing needle valves and third valves on the other two groups of simulation detection units, respectively pumping out the medicaments in the middle container through a power source, enabling the medicaments to enter the first group of simulation detection units after being converged, recording foam images of foams in the first group of etched glass through a camera, and transmitting the foam images to a computer for storage;
(3) and (3) testing for the second time: opening needle valves, a first valve and a third valve on the first group of analog detection units and the second group of analog detection units, closing the needle valves on the second valve and the third group of analog detection units, respectively pumping out the medicaments in the middle container through the power source, enabling the medicaments to enter the first group of analog detection units and the second group of analog detection units in sequence after the medicaments are converged, recording foam images of foam in the first group of etched glass and the second group of etched glass through the camera, and transmitting the foam images to the computer for storage;
(4) and (3) testing for the third time: opening needle valves and first valves on the first group of simulation detection units, the second group of simulation detection units and the third group of simulation detection units, closing the second valves and the third valves, respectively pumping out the medicaments in the middle container through a power source, enabling the medicaments to enter the first group of simulation detection units, the second group of simulation detection units and the third group of simulation detection units in sequence after the medicaments are converged, recording foam images of foams in the first group of etching glass, the second group of etching glass and the third group of etching glass through cameras, and transmitting the foam images to a computer for storage;
(5) changing the rock cores with different permeability and pore structures, repeating the operations in the steps (2), (3) and (4), collecting foam images, carrying out binarization processing on the foam images collected in the steps (2), (3) and (4) of the different rock cores, carrying out fractal dimension calculation on the processed images, and obtaining the influence of the different rock core lengths and permeability on the performance of the self-generated foam system through fractal dimension values.
2. The all-round analysis and fractal evaluation method of the self-generated foam system as claimed in claim 1, wherein a cavity (14) is disposed in the middle of the etched glass (12), and both ends of the cavity (14) are respectively provided with an access channel.
3. The method for the comprehensive analysis and fractal evaluation of self-generating foam systems according to claim 2, wherein the cavities (14) are square in shape.
4. The all-round analysis and fractal evaluation method of the self-generated foam system as claimed in claim 1, wherein transparent squeeze plates (15) are respectively disposed on the upper and lower sides of the etched glass (12), and the transparent squeeze plates (15) are fixedly connected with each other by bolts.
5. The all-round analysis and fractal evaluation method of the self-generated foam system as claimed in claim 1, wherein the power source (1) and the intermediate container (2) are respectively provided with two groups, and the power source (1) and the intermediate container (2) are connected in pairs.
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| CN202111243094.1A CN113984583B (en) | 2021-10-25 | 2021-10-25 | Self-generated foam system performance testing device and performance evaluation method |
| LU500886A LU500886B1 (en) | 2021-10-25 | 2021-11-22 | Device and method for testing and evaluating the properties of self-generated foam system |
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| CN202111243094.1A CN113984583B (en) | 2021-10-25 | 2021-10-25 | Self-generated foam system performance testing device and performance evaluation method |
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| CN113984583B true CN113984583B (en) | 2022-09-13 |
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