LU500886B1 - Device and method for testing and evaluating the properties of self-generated foam system - Google Patents
Device and method for testing and evaluating the properties of self-generated foam system Download PDFInfo
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- LU500886B1 LU500886B1 LU500886A LU500886A LU500886B1 LU 500886 B1 LU500886 B1 LU 500886B1 LU 500886 A LU500886 A LU 500886A LU 500886 A LU500886 A LU 500886A LU 500886 B1 LU500886 B1 LU 500886B1
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- 239000006260 foam Substances 0.000 title claims abstract description 117
- 238000012360 testing method Methods 0.000 title claims abstract description 104
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000004088 simulation Methods 0.000 claims abstract description 63
- 239000011521 glass Substances 0.000 claims description 31
- 238000011156 evaluation Methods 0.000 claims description 18
- 230000035699 permeability Effects 0.000 claims description 17
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 238000005086 pumping Methods 0.000 claims description 12
- 238000012800 visualization Methods 0.000 claims description 7
- 239000011148 porous material Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 238000012854 evaluation process Methods 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 4
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 24
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 20
- 235000019270 ammonium chloride Nutrition 0.000 description 12
- 239000003795 chemical substances by application Substances 0.000 description 12
- 235000010288 sodium nitrite Nutrition 0.000 description 10
- 239000004088 foaming agent Substances 0.000 description 8
- 239000000243 solution Substances 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000005755 formation reaction Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012611 container material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000013012 foaming technology Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process 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
- 230000004044 response Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- 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
-
- 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
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Fluid Mechanics (AREA)
- Dispersion Chemistry (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
Present invention discloses a device and a method for testing and evaluating the properties of self-generated foam system, where the device includes a power source, an intermediate container, a simulation test unit and a back pressure device connected successively, a first valve is disposed on the front of the back pressure device, the simulation test unit includes three sets, wherein series pipes are disposed among the three sets. Branch pipes are respectively disposed between the first set of simulation test unit and the second set of simulation test unit, and between the second set of simulation test unit and the third set of simulation test unit, the ends of branch pipes are respectively connected to the first valve, a second valve and a third valve are disposed on the branch pipes respectively, and the simulation test units are electrically connected to a computer respectively. The device can effectively solve the problems that existing devices are not suitable for testing self-generated foam system.
Description
[0001] 1. Technical Filed
[0002] The present invention relates to the technical field of a device for testing the properties of self-generated foam system, and more particularly, to a device and a method for testing and evaluating the properties of self-generated foam system.
[0003] 2. Description of Related Art
[0004] Foam fluid is widely applied in the exploitation of petroleum, and makes a significant contribution in various aspects such as drilling, fracturing, acidizing, plugging removal, profile control, and oil displacement. Foam system is characterized by only plugging the high permeability layer rather than the low permeability layer and the water layer rather than the oil layer, which shows the significant effects on reducing moisture content, and improving heterogeneous reservoir liquid producing profile, displacement efficiency of mid-low permeability reservoirs, and recovery efficiency. However, in the exploitation of offshore oil field, nitrogen generators have not been widely applied, because the offshore platform is subject to space, safety and other factors. Self-generated foam technology is a technology to makes use of chemical methods to produce gases and then form foams with foaming agent, which has the advantages of low injection pressure and no requirement for nitrogen generators with widely application in offshore platforms in recent years.
[0005] The general foam evaluation methods mainly include a stirring method and a seepage method. The stirring method is widely used in foam fluid evaluation and mainly used by stirring the foaming agent solution at a certain speed. Foaming volume and half-life as evaluation indexes are 1 valuable to conventional foam system. The seepage method is mainly used to evaluate the mobility property of foam formations by injecting foam into a core at a certain permeability, and the evaluation indexes include the resistance factor. The two methods are the basic methods for evaluating foam systems, which are more effective for screening conventional foam systems. However, conventional methods are not applicable to the self-generated foam system due to its characteristics. Firstly, the stirring method has no assistance for the process of self-generating foam by chemical reaction. Secondly, in the formation seepage process, the foams generated by the self-generated foam system in the formation with chemical reaction have a great change in resistance factor, which cannot define their superior and inferior by conventional evaluation indexes.
[0006] In order to better utilize the foam fluid properties to increase oil production on offshore platforms, there is an urgent need for a device and a method suitable for self-generated foam system property evaluation.
[0007] In response to the above deficiencies in the prior art, the present invention provides a device and a method for testing and evaluating the properties of self-generated foam system, which can effectively solve the problems that existing devices are not suitable for testing self-generated foam system.
[0008] In order to achieve the above purpose, technical solutions adopted by the present invention to solve the technical problems are:
[0009] A device for testing the properties of self-generated foam system, where the device includes a power source, an intermediate container, a simulation test unit and a back pressure device 2 connected successively, a first valve is disposed on the front of the back pressure device, the simulation test unit includes three sets, wherein series pipes are disposed among the three sets. Branch pipes are respectively disposed between the first set of simulation test unit and the second set of simulation test unit, and between the second set of simulation test unit and the third set of simulation test unit, the ends of branch pipes are respectively connected to the first valve, a second valve and a third valve are disposed on the branch pipes respectively, and the simulation test units are electrically connected to a computer respectively.
[0010] In the above solution, a plunger pump is used as the power source, and connected to the bottom of the intermediate container, and raw materials in the intermediate container are pumped out with the power provided by the plunger pump to facilitate the test. The first valve, the second valve and the third valve are all set as needle valves, and a back pressure valve is set as the back pressure device to control the magnitude of the back pressure; a liquid collection container is disposed on the lower part of the back pressure valve to collect the foam liquid after the test.
[0011] Further, the simulation test unit includes the needle valve, a core holder and a high-voltage visualization unit connected successively.
[0012] Still further, the high-voltage visualization unit includes a camera, an etched glass and a light source in order from top to bottom, and the camera is electrically connected to the computer.
[0013] In the above solution, a high-definition camera is used as the camera to acquire the foam condition on the etched glass in real time, and a light source is disposed on the lower part of the etched glass to fill light and improve the image clarity acquired by the camera.
[0014] Further, a cavity is disposed on the middle of the etched glass, and access channels are disposed on both ends of the cavity.
[0015] In the above solution, the cavity is used to contain the formed foams, and after 3 entering the cavity, the foams are gradually discharged by the power source. The morphologies and sizes of the foams formed in the cavity are various at different times, thus the properties of the self-generated foam system can be evaluated based on the foam state acquired by the camera.
[0016] Still further, the cavity has a square shape.
[0017] Further, transparent extrusion plates are respectively disposed on the top and bottom sides of the etched glass, which are connected to each other by bolts.
[0018] In the above solution, the etched glass has a limited compressive strength, thus the transparent extrusion plates disposed outside the etched glass can squeeze the etched glass to reduce the risk of broken etched glass.
[0019] Still further, two sets of power sources and intermediate containers are respectively disposed, and the power sources are connected to the intermediate containers in pairs.
[0020] A fractal evaluation method for the overall displacement property of self-generated foam system, which uses the above test device for testing and evaluation, the specific test and evaluation process 1s:
[0021] (1) Pouring the prepared self-generated foam agents into two intermediate containers respectively, and filling three cores with the same permeability and pore structure into three core holders respectively;
[0022] (2) Opening the needle valve and the first valve on the three sets of simulation test units, closing the second valve and the third valve at the same time, pumping out the agents in the intermediate containers by the power source respectively, the agents in confluence entering each set of simulation test unit in turn, recording the foam images in each set of the etched glass by the camera respectively, and transferring the foam images to the computer for storage.
[0023] (3) Binarizing the foam images acquired by each set of cameras in the same moment, 4 and performing fractal dimension calculation on the binary foam images by using a box counting method to obtain the overall displacement property of the self-generated foam system.
[0024] The above device 1s used for a fractal evaluation method for the overall displacement property of self-generated foam system, and the specific test and evaluation process is: 5 [0025] (1) Pouring the prepared self-generated foam agents into two intermediate containers respectively, and filling three cores with the same permeability and pore structure into three core holders respectively;
[0026] (2) First test: opening the needle valve and the first valve and the second valve on the first set of the simulation test unit, closing the needle valves and the third valves on other two sets of the simulation test units, pumping out the agents in the intermediate containers by the power source respectively, the agents in confluence entering the first set of simulation test unit, recording the foam images in the first set of the etched glass by the camera, and transferring the foam images to the computer for storage.
[0027] (3) Second test: opening the needle valves, the first valves and the third valves on the first and second sets of simulation test units, closing the second valve and the needle valve on the third set of the simulation test unit, pumping out the agents in the intermediate containers by the power source respectively, the agents in confluence entering the first and second sets of simulation test units in turn, recording the foam images in the first and second sets of the etched glass by the camera respectively, and transferring the foam images to the computer for storage.
[0028] (4) Third test: opening the needle valves, the first valves on the first, second and third sets of simulation test units, closing the second valves and the third valves, pumping out the agents in the intermediate containers by the power source respectively, the agents in confluence entering the first, second and third sets of simulation test units in turn, recording the foam images in the first, 5 second and third sets of the etched glass by the camera respectively, and transferring the foam images to the computer for storage.
[0029] (5) Replacing the cores with different permeability and pore structure, repeating the operations in steps (2), (3), and (4) to acquire foam images, binarizing the foam images acquired for different cores after steps (2), (3), and (4), and performing fractal dimension calculation on the binary foam images by using a box counting method to obtain the effects of different core lengths and permeability on the property of the self-generated foam system.
[0030] Beneficial effects of the above solution:
[0031] 1. The device system acquires, records and processes the foam images, so as to realize the all-round and all-process testing for the property and seepage rule of self-generated foam system, which has the advantages of strong target and wide testing area, and the device can be suitable to the property test for various self-generated foam systems with wide application.
[0032] 2. The device of the present invention 1s simple in structure and easy to implement, which provides an appropriate way on the property evaluation of foam and related complex fluids on offshore oil platforms.
[0033] 3. Based on the fractal theory, the present invention directly analyzes the foam structural change, builds a bridge between microstructure and macroscopic property of foam, which boosts the evaluation result accuracy, and compensates for the deficiencies of conventional evaluation methods.
[0034] FIG. 1 is a schematic structural diagram of the present invention;
[0035] FIG. 2 is a schematic structural diagram of an etched glass; 6
[0036] FIG. 3 is a positional relationship diagram between an etched glass and a light source; and
[0037] FIG. 4 is a schematic diagram of foam morphology change during reaction for 10 min.
[0038] Appended drawing reference signs: 1. Power source; 2. Intermediate container; 3.
Back pressure device; 4. First valve; 5. Second valve; 6. Third valve; 7. Computer; 8. Needle valve;
9. Core holder; 10. High-voltage visualization unit; 11. Camera; 12. Etched glass; 13. Light source;
14. Cavity; 15. Transparent extrusion plate.
[0039] In the following, embodiments of the present invention will be explained in detail with reference to the accompanying drawings.
[0040] One embodiment of the present invention, as shown in FIG. 1-FIG. 4, provides a device for testing the properties of self-generated foam system, including a power source 1, an intermediate container 2, a simulation test unit and a back pressure device 3 connected successively, preferably, two sets of power sources 1 and intermediate containers 2 are respectively disposed, and the power sources 1 are connected to the intermediate containers 2 in pairs.
[0041] A first valve 4 is disposed on the front of the back pressure device 3, the simulation test unit includes three sets, wherein series pipes are disposed among the three sets. Branch pipes are respectively disposed between the first set of simulation test unit and the second set of simulation test unit, and between the second set of simulation test unit and the third set of simulation test unit, the ends of branch pipes are respectively connected to the first valve 4, a second valve 5 and a third valve 6 are disposed on the branch pipes respectively, and the simulation test units are electrically connected to a computer 7 respectively. Preferably, the simulation test unit 7 includes the needle valve 8, a core holder 9 and a high-voltage visualization unit 10 connected successively. Preferably, the high-voltage visualization unit 10 includes a camera 11, an etched glass 12 and a light source 13 in order from top to bottom, and the camera 11 is electrically connected to the computer 7. Preferably, a cavity 12 1s disposed on the middle of the etched glass 14, and access channels are disposed on both ends of the cavity 14. Preferably, the cavity 14 has a square shape. Preferably, transparent extrusion plates 15 are respectively disposed on the top and bottom sides of the etched glass 12, which are connected to each other by bolts.
[0042] The above device is used for a fractal evaluation method for the overall displacement property of self-generated foam system, including the following steps: (1) The prepared self-generated foam agents, ammonium chloride and sodium nitrite, are poured into two intermediate containers respectively, the intermediate container containing the ammonium chloride is further added with a foaming agent SDS, and three cores with the same permeability of 2000 mD are filled in three core holders respectively. Each core holder is with a length of 30 cm, and the cores through the core holders are used to simulate the front, middle and rear sections of the replacement formation.
[0043] (2) The three sets of simulation test units are disposed in an incubator to simulate the chemical reaction temperature with a constant temperature of 60°C. In detection, the needle valves and the first valves on the three sets of simulation test units are opened simultaneously, while the second valves and the third valves are closed, then the ammonium chloride and sodium nitrite in the intermediate container are pumped out at a rate of 0.3 mL/min by a plunger pump, the pumping volume of which is 2 PV, the ammonium chloride and sodium nitrite in confluence enter each sets of simulation test units in turn, and both react chemically within the core to generated foam by the foaming agent, the foam images in each sets of the etched glass by the camera are recorded 8 respectively, and are transferred to the computer for storage.
[0044] (3) The foam images acquired by each set of cameras are binarized in the same moment, and fractal dimension on the binary foam images 1s calculated by using a box counting method to obtain the overall displacement property of the self-generated foam system; the larger the fractal dimension value, the more dispersed the foam structure, and the worse the property, while the smaller the fractal dimension value, the more uniform the foam and the better the property. The fractal dimension reflects foam structure changing along the overall process of displacement in different sections at the same time. The characteristics of the property change in the whole process of foam seepage are analyzed.
[0045] The above device 1s used for a fractal evaluation method for the overall displacement property of self-generated foam system, and the specific test and evaluation process is:
[0046] (1) The prepared self-generated foam agents, ammonium chloride and sodium nitrite, are poured into two intermediate containers respectively, the intermediate container containing the ammonium chloride is further added with a foaming agent SDS, and three cores with the same permeability of 2000 mD are filled in three core holders respectively.
[0047] (2) The three sets of simulation test units are disposed in an incubator to simulate the chemical reaction temperature with a constant temperature of 60°C; first test: the needle valve, the first valve and the second valve on the first set of the simulation test unit are opened, while the needle valves and the third valves on other two sets of the simulation test units are closed, then the ammonium chloride and sodium nitrite in the intermediate container are pumped out at a rate of 0.3 mL/min by a plunger pump, and the pumping volume of which is 2 PV, the ammonium chloride and sodium nitrite in confluence enter the first set of simulation test unit, and both react chemically within the core to produce foam by means of the foaming agent, the foam images in the first set of 9 the etched glass are recorded by the camera, and are transferred to the computer for storage.
[0048] (3) Second test: the needle valves, the first valves and the third valves on the first and second sets of simulation test units are opened , while the second valves and the needle valve on the third set of the simulation test unit are closed, then the ammonium chloride and sodium nitrite in the intermediate container are pumped out at a rate of 0.3 mL/min by the plunger pump, and the pumping volume of which is 2 PV, the ammonium chloride and sodium nitrite in confluence enter the first and second sets of simulation test units, and both react chemically within the core to produce foam by means of the foaming agent, the foam images in the first and second sets of the etched glass are recorded by the camera, and are transferred to the computer for storage.
[0049] (4) Third test: the needle valves, the first valves on the first, second and third sets of simulation test units are opened, while the second valves and the third valves are closed, then the ammonium chloride and sodium nitrite in the intermediate container are pumped out at a rate of 0.3 mL/min by the plunger pump, and the pumping volume of which is 2 PV, the ammonium chloride and sodium nitrite in confluence enter the first, second and third sets of simulation test units, and both react chemically within the core to produce foam by means of the foaming agent, the foam images in the first, second and third sets of the etched glass are recorded by the camera, and are transferred to the computer for storage.
[0050] (5) The cores with the permeability of 500 mD are replaced, foam images are acquired by repeating the operations in steps (2), (3), and (4), then the foam images acquired for different cores after steps (2), (3), and (4) are binarized, and fractal dimension on the binary foam images is calculated to obtain the effects of different core lengths and permeability on the property of the self-generated foam system; the larger the fractal dimension value, the more dispersed the foam structure, and the worse the property, while the smaller the fractal dimension value, the more 10 uniform the foam and the better the property. The influencing factors of foam seepage are comprehensively analyzed by comparing the effects of different core lengths and permeability on the foam fractal dimension.
[0051] The above devices are also applied to two-liquid chemical systems generating N» and CO» and different surfactant systems, not limited to the property test of the above self-generated foam system.
[0052] FIG. 4 is a state diagram of foam in three sets of etched glasses during reaction for 10 min, it can be seen that the fractal dimension is larger in the front part of the core and has not yet formed better foam morphology, the fractal dimension is smaller in the middle section and forms foams with better properties, while the fractal dimension becomes slightly larger in the rear section and the foam structure gradually deteriorates. 11
Claims (9)
1.A device for testing the properties of self-generated foam system, wherein the device includes a power source(1), an intermediate container(2), a simulation test unit and a back pressure device(3) connected successively, a first valve(4) is disposed on the front of the back pressure device(3), the simulation test unit includes three sets, wherein series pipes are disposed among the three sets, branch pipes are respectively disposed between the first set of simulation test unit and the second set of simulation test unit, and between the second set of simulation test unit and the third set of simulation test unit, the ends of branch pipes are respectively connected to the first valve(4), a second valve (5) and a third valve(6) are disposed on the branch pipes respectively, and the simulation test units are electrically connected to a computer(7) respectively.
2. The device for testing the properties of self-generated foam system according to claim 1, the simulation test unit includes the needle valve(8), a core holder (9) and a high-voltage visualization unit(10) connected successively.
3. The device for testing the properties of self-generated foam system according to claim 2 ‚the high-voltage visualization unit (10) includes a camera(11), an etched glass(12) and a light source(13) in order from top to bottom, and the camera(11) is electrically connected to the computer(7).
4 The device for testing the properties of self-generated foam system according to claim 3, a cavity (14) is disposed on the middle of the etched glass(12), and access channels are disposed on both ends of the cavity(14).
5. The device for testing the properties of self-generated foam system according to claim 4, the cavity (14) has a square shape.
6.The device for testing the properties of self-generated foam system according to claim 3, 12 transparent extrusion plates (15) are respectively disposed on the top and bottom sides of the etched glass(12), which are connected to each other by bolts.
7.The device for testing the properties of self-generated foam system according to claim 1,two sets of power sources(1) and intermediate containers(2) are respectively disposed, and the power sources (1)are connected to the intermediate containers(2) in pairs.
8.A fractal evaluation method for the overall displacement property of self-generated foam system, which uses the above any of claim 1-7 device for testing and evaluation, the specific test and evaluation process is: (1) pouring the prepared self-generated foam agents into two intermediate containers respectively, and filling three cores with the same permeability and pore structure into three core holders respectively; (2) opening the needle valve and the first valve on the three sets of simulation test units, closing the second valve and the third valve at the same time, pumping out the agents in the intermediate containers by the power source respectively, the agents in confluence entering each set of simulation test unit in turn, recording the foam images in each set of the etched glass by the camera respectively, and transferring the foam images to the computer for storage; (3) binarizing the foam images acquired by each set of camera in the same moment, and performing fractal dimension calculation on the binary foam images by using a box counting method to obtain the overall displacement property of the self-generated foam system;
9.A fractal evaluation method for the overall displacement property of self-generated foam system, which uses the above any of claim 1-7 device for testing and evaluation, the specific test and evaluation process is: (1) pouring the prepared self-generated foam agents into two intermediate containers respectively, 13 and filling three cores with the same permeability and pore structure into three core holders respectively;
(2) first test: opening the needle valve and the first valve and the second valve on the first set of the simulation test unit, closing the needle valves and the third valves on other two sets of the simulation test units, pumping out the agents in the intermediate containers by the power source respectively, the agents in confluence entering the first set of simulation test unit, recording the foam images in the first set of the etched glass by the camera, and transferring the foam images to the computer for storage;
(3) second test: opening the needle valves, the first valves and the third valves on the first and second sets of simulation test units, closing the second valve and the needle valve on the third set of the simulation test unit, pumping out the agents in the intermediate containers by the power source respectively, the agents in confluence entering the first and second sets of simulation test units in turn, recording the foam images in the first and second sets of the etched glass by the camera respectively, and transferring the foam images to the computer for storage;
(3) third test: opening the needle valves, the first valves on the first, second and third sets of simulation test units, closing the second valves and the third valves, pumping out the agents in the intermediate containers by the power source respectively, the agents in confluence entering the first, second and third sets of simulation test units in turn, recording the foam images in the first, second and third sets of the etched glass by the camera respectively, and transferring the foam images to the computer for storage;
(4) replacing the cores with different permeability and pore structure, repeating the operations in steps (2), (3), and (4) to acquire foam images, binarizing the foam images acquired for different cores after steps (2), (3), and (4), and performing fractal dimension calculation on the binary foam 14 images by using a box counting method to obtain the effects of different core lengths and permeability on the property of the self-generated foam system. 15
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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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| CN204903506U (en) * | 2015-09-02 | 2015-12-23 | 中国石油集团渤海钻探工程有限公司 | Foam flooding evaluation device |
| MX2016016451A (en) * | 2016-12-13 | 2018-06-12 | Mexicano Inst Petrol | Experimental device to determine the foam resistance factor. |
| CN106771090B (en) * | 2016-12-26 | 2019-11-12 | 浙江海洋大学 | Along the measuring method and measurement device of journey emulsification of crude oil ability during a kind of template surface activating agent displacement of reservoir oil |
| CN107842349B (en) * | 2017-12-22 | 2021-02-19 | 浙江海洋大学 | Device for simulating displacement effect of thick oil steam-foam displacement system in different temperature areas and using method |
| CN108318636B (en) * | 2018-02-25 | 2019-07-12 | 东北石油大学 | A kind of more round anti-adsorption evaluation methods of foam system |
| US10845322B2 (en) * | 2019-01-31 | 2020-11-24 | King Fahd University Of Petroleum And Minerals | Method and apparatus for measuring capillary pressure and foam transport in porous media |
| CN212134441U (en) * | 2020-05-20 | 2020-12-11 | 西南石油大学 | Rock core displacement experimental apparatus |
| CN111810139A (en) * | 2020-07-17 | 2020-10-23 | 中国石油化工股份有限公司 | Carbon dioxide foam channeling sealing experimental device and method |
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| CN113984583A (en) | 2022-01-28 |
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