CN117432401A - Device and method for simulating physical simulation of water plugging of side-bottom water reservoir horizontal well section - Google Patents
Device and method for simulating physical simulation of water plugging of side-bottom water reservoir horizontal well section Download PDFInfo
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- CN117432401A CN117432401A CN202311503025.9A CN202311503025A CN117432401A CN 117432401 A CN117432401 A CN 117432401A CN 202311503025 A CN202311503025 A CN 202311503025A CN 117432401 A CN117432401 A CN 117432401A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 297
- 238000004088 simulation Methods 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 claims abstract description 132
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 113
- 238000002347 injection Methods 0.000 claims abstract description 61
- 239000007924 injection Substances 0.000 claims abstract description 61
- 238000000429 assembly Methods 0.000 claims abstract description 50
- 230000000712 assembly Effects 0.000 claims abstract description 50
- 238000012544 monitoring process Methods 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 16
- 239000008398 formation water Substances 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 10
- 230000015572 biosynthetic process Effects 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims description 8
- 238000000605 extraction Methods 0.000 claims description 6
- 229920006395 saturated elastomer Polymers 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 230000011218 segmentation Effects 0.000 claims 1
- 238000013508 migration Methods 0.000 abstract description 13
- 230000005012 migration Effects 0.000 abstract description 13
- 238000012512 characterization method Methods 0.000 abstract description 4
- 238000011156 evaluation Methods 0.000 abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 13
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- 238000011161 development Methods 0.000 description 4
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- 239000006004 Quartz sand Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- JBTHDAVBDKKSRW-UHFFFAOYSA-N chembl1552233 Chemical compound CC1=CC(C)=CC=C1N=NC1=C(O)C=CC2=CC=CC=C12 JBTHDAVBDKKSRW-UHFFFAOYSA-N 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229960000907 methylthioninium chloride Drugs 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 229940073450 sudan red Drugs 0.000 description 2
- 201000004569 Blindness Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/002—Survey of boreholes or wells by visual inspection
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/005—Monitoring or checking of cementation quality or level
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/10—Locating fluid leaks, intrusions or movements
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Quality & Reliability (AREA)
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Abstract
The invention discloses a device and a method for a side bottom water reservoir horizontal well segment water shutoff physical simulation experiment, wherein the device comprises a side bottom water reservoir simulation system, a horizontal well segment simulation system, a plugging agent injection system and a segment metering system; the side bottom water oil reservoir simulation system comprises an oil reservoir simulation device, an oil supply device and a water supply device; the oil reservoir simulating device is provided with an inlet; the oil supply device and the water supply device are communicated with the inlet; the horizontal well and segment simulation system comprises a horizontal well pipe and a plurality of horizontal well electromagnetic valves; the horizontal well pipe is arranged in the oil reservoir simulation device; the plugging agent injection system comprises a plugging agent injection device and a plurality of plugging agent ingress pipe assemblies; the sectional metering system comprises a plurality of production conduit assemblies, and metering monitoring assemblies are arranged at the wellhead of the production conduit assemblies and the wellhead of the horizontal well pipe. The invention can realize the accurate sectional water shutoff simulation of the horizontal well pipe and the characterization and evaluation of the oil-water migration law after water shutoff, and provides production guidance for the sectional water shutoff of the horizontal well pipe.
Description
Technical Field
The invention relates to the field of simulation experiment devices, in particular to a device and a method for simulating physical water plugging of a side bottom water reservoir horizontal well in a segmented mode.
Background
The horizontal well can increase the contact area with the oil reservoir, and is an important means for efficiently developing the low-permeability oil reservoir. However, when the side bottom water exists, the stratum water is easy to burst in along cracks or high-permeability strips, and once the water breaks through, the yield of the horizontal well is greatly reduced, so that the development effect of the low-permeability oil reservoir is severely restricted. Chemical water shutoff is a common horizontal well water control means, but the current sectional water shutoff mechanism and sectional water shutoff effect of the horizontal well are not known enough, so that blindness exists in the current sectional water shutoff design of the horizontal well.
Physical simulation is an important method for knowing the water shutoff mechanism, and in the prior art, chinese patent publication No. CN201786355U discloses a selective chemical water shutoff simulation device for a gravel packing well, which performs selective chemical water shutoff simulation on the gravel packing well and evaluates the effect of chemical agents on a target layer. In addition, chinese patent publication No. CN201935852U discloses a system of oil well selective water shutoff simulation device, which simulates four oil layers of four different properties through four holders, tests the plugging rate and breakthrough pressure at different layers, and determines the plugging rate and plugging rate of water shutoff agent. However, in the above technical solutions, the water blocking simulation of the horizontal well section is not involved, the oil-water migration process after the water blocking of the horizontal well section cannot be simulated, the water blocking mechanism of the water blocking of the horizontal well section cannot be represented, and further guidance cannot be provided for the water blocking and water controlling operation of the low-permeability reservoir horizontal well.
Therefore, a device and a method for simulating the sectional water plugging physics of a side-bottom water reservoir horizontal well are provided.
Disclosure of Invention
The invention aims to provide a device and a method for a side-bottom water reservoir horizontal well subsection water shutoff physical simulation experiment, which aim to solve or improve at least one of the technical problems.
In order to achieve the above object, the present invention provides the following solutions: the invention provides a side bottom water reservoir horizontal well subsection water shutoff physical simulation experiment device, which comprises:
the system comprises a side bottom water oil reservoir simulation system, an oil reservoir simulation device, an oil supply device and a water supply device; the bottom and two opposite side walls of the oil reservoir and reservoir simulation device are provided with inlets; the three output ends of the oil supply device and the three output ends of the water supply device are respectively communicated with the three inlets;
the horizontal well and segment simulation system comprises a horizontal well pipe and a plurality of horizontal well electromagnetic valves; a plurality of horizontal well electromagnetic valves are arranged in the horizontal well pipe at intervals; the horizontal well pipe is arranged in the oil reservoir simulation device, and a horizontal section of the horizontal well pipe is provided with a plurality of perforations;
the plugging agent injection system comprises a plugging agent injection device and a plurality of plugging agent ingress pipe assemblies; one end of each plugging agent ingress pipe assembly is respectively communicated with the output end of each plugging agent ingress device, and the other end of each plugging agent ingress pipe assembly is communicated with the horizontal well pipe;
the sectional metering system comprises a plurality of production conduit assemblies communicated with the horizontal well pipe, and metering monitoring assemblies are arranged at the wellhead of the production conduit assemblies and the wellhead of the horizontal well pipe; the production conduit assemblies and the plugging agent ingress pipe assemblies are arranged in a staggered mode.
According to the invention, the oil reservoir storage layer simulation device comprises a transparent box body for filling sand, wherein a first side water inlet and a second side water inlet are respectively formed in two opposite side walls of the transparent box body; a bottom water inlet is formed in the bottom of the transparent box body; three output ends of the oil supply device are respectively communicated with the first side water inlet, the second side water inlet and the bottom water inlet; three output ends of the water supply device are respectively communicated with the first side water inlet, the second side water inlet and the bottom water inlet;
the side wall and the bottom wall of the transparent box body are provided with water supply networks, and the first side water inlet, the second side water inlet and the bottom water inlet are communicated with the inner cavity of the transparent box body through the water supply networks; an end cover is detachably connected to the top of the transparent box body; the horizontal well pipe is installed in the transparent box body.
According to the invention, the oil supply device comprises a first plunger double pump, a first intermediate container and a first six-way valve; the water supply device comprises a second plunger double pump, a second intermediate container and a second six-way valve; the first six-way valve is provided with a first pressure gauge, and the second six-way valve is provided with a second pressure gauge;
one end of the first intermediate container is connected with the first plunger double pump, and the other end of the first intermediate container is connected with three oil outlet pipes through the first six-way valve; one end of the second intermediate container is connected with the second plunger double pump, and the other end of the second intermediate container is connected with three water outlet pipes through the second six-way valve; the three oil outlet pipes are respectively communicated with the first side water inlet, the second side water inlet and the bottom water inlet; the three water outlet pipes are respectively communicated with the first side water inlet, the second side water inlet and the bottom water inlet.
According to the sectional water shutoff physical simulation experiment device for the side bottom water reservoir horizontal well, which is provided by the invention, three plugging agent ingress pipe assemblies are arranged; the plugging agent injection device comprises a third plunger double pump, a third intermediate container and a third six-way valve, wherein a third pressure gauge is arranged on the third six-way valve, one end of the third intermediate container is connected with the third plunger double pump, and the other end of the third intermediate container is communicated with three plugging agent ingress pipe assemblies through the third six-way valve.
According to the sectional water plugging physical simulation experiment device for the side bottom water reservoir horizontal well, which is provided by the invention, the plugging agent ingress pipe assembly comprises ingress pipe bodies which are connected to the horizontal well pipe in a threaded manner, the ingress pipe bodies are communicated with the horizontal well pipe, a plugging agent ingress electromagnetic valve is arranged at one end, close to the horizontal well pipe, of the ingress pipe bodies, and the plugging agent ingress electromagnetic valve is connected with a plugging agent ingress electromagnetic valve controller; and one ends of the three ingress pipe bodies, which are far away from the horizontal well pipe, are communicated with the third intermediate container through the third six-way valve.
According to the sectional water plugging physical simulation experiment device for the side bottom water reservoir horizontal well, which is provided by the invention, three production conduit assemblies are arranged, each production conduit assembly comprises a production conduit body which is connected to the horizontal well pipe in a threaded manner, one end of each production conduit, which is close to the horizontal well pipe, is provided with a production conduit electromagnetic valve, and each production conduit is communicated with the horizontal well pipe; the production conduit electromagnetic valve is connected with a production conduit electromagnetic valve controller; the metering monitoring assembly is arranged at one end of the production conduit assembly far away from the horizontal well pipe; the three production catheter bodies and the three ingress pipe bodies are arranged in a staggered mode.
According to the sectional water plugging physical simulation experiment device for the side bottom water reservoir horizontal well, provided by the invention, four metering and monitoring assemblies are arranged, each metering and monitoring assembly comprises a metering pipe, and the four metering pipes are respectively connected with the horizontal well pipe and the three production conduit bodies through pipelines.
According to the sectional water plugging physical simulation experiment device for the side bottom water reservoir horizontal well, three electromagnetic valves of the horizontal well are arranged in the horizontal well pipe at intervals; the horizontal well electromagnetic valve is connected with a horizontal well electromagnetic valve controller; the three electromagnetic valves of the horizontal well, the three electromagnetic valves of the plugging agent introduction and the three electromagnetic valves of the production guide pipe are staggered.
The invention also provides a sectional water shutoff physical simulation experiment method for the side bottom water reservoir horizontal well, which comprises the following steps:
step one, layering and sand filling in an oil reservoir simulating device, and paving a horizontal well pipe in the oil reservoir simulating device;
step two, saturated simulated formation water: opening a plurality of horizontal well electromagnetic valves and a plurality of production conduit assemblies, and injecting simulated formation water into the oil deposit reservoir simulation device through a bottom inlet of the oil deposit reservoir simulation device through the water supply device to saturate;
step three, saturated simulated formation oil: injecting simulated formation oil into the oil reservoir simulating device through the bottom inlet of the oil reservoir simulating device by the oil supply device, and recording the liquid production amounts of a plurality of production conduit assemblies until the production conduit assemblies are not discharged;
closing a bottom inlet of the reservoir simulating device and a plurality of production conduit assemblies;
injecting simulated formation water into the oil reservoir simulating device through a bottom inlet of the oil reservoir simulating device by a water supply device to carry out bottom water oil displacement, and starting a production conduit assembly to carry out oil extraction;
step six, starting a production conduit assembly positioned at the left side, recording the liquid production amount and the water production amount of the production conduit assembly through a metering and monitoring assembly, calculating the water production amount of the production conduit assembly and the water production amount of an oil reservoir, and observing the bottom water propulsion law;
step seven, when the oil reservoir water yield is 80%, closing the left outlet of the horizontal well pipe; closing the production conduit assembly positioned at the left side to stop oil production, recording the sectional liquid production speed and water content, and keeping the constant pressure of the supply end;
step eight, water blocking in sections: filling the prepared chemical plugging agent into an intermediate container, opening corresponding plugging agent guiding electromagnetic valves of an injection section according to a set sectional water shutoff strategy, closing three horizontal well electromagnetic valves, other two plugging agent guiding electromagnetic valves and three production conduit electromagnetic valves, and injecting the plugging agent into a reservoir simulation device through a plugging agent injection device and a selected plugging agent guiding pipe assembly; observing the pushing form in the plugging agent injection process after the plugging agent is injected, and taking a picture;
stopping injection after the set injection amount of the plugging agent is reached, closing the plugging agent injection device and the plugging agent introduction electromagnetic valve, and recording the sectional liquid production speed and the sectional water content;
step ten, starting the production conduit assembly and the horizontal well electromagnetic valve to perform sectional oil extraction, continuing to produce until the oil reservoir water yield is 90%, closing the production conduit assembly to stop oil production, and ending the test; and simultaneously drawing a curve of the oil reservoir water yield along with the accumulated oil production time.
According to the invention, in the second step, the water supply device injects simulated stratum water into the oil reservoir simulation device through the bottom inlet of the oil reservoir simulation device at a speed of 2ml/min for saturation, and stops injection and closes the bottom inlet of the oil reservoir simulation device when the injection amount is 2 PV;
in the third step, the oil supply device injects simulated formation oil into the oil reservoir simulating device through the bottom inlet of the oil reservoir simulating device at a speed of 2 ml/min.
The invention discloses the following technical effects:
according to the invention, the bottom and the two side walls of the oil reservoir simulation device can be respectively subjected to water injection and oil injection operation through the oil supply device and the water supply device, so that the boundary surface is supplied by side water and bottom water at equal pressure, and the simulation of the side bottom water propulsion process is realized; by filling quartz sand with different particle sizes in a reservoir stratum simulation device in a layering manner, the influence of longitudinal heterogeneity of the reservoir on the development of a horizontal well and the water shutoff process can be simulated;
according to the invention, through the plugging agent injection device and the plurality of plugging agent ingress pipe assemblies, accurate segmented water plugging simulation of the horizontal well pipe can be realized, further characterization and evaluation of oil-water migration rules after water plugging can be realized, and the side bottom water inrush characteristics, the plugging agent segmented injection characteristics and the oil-water migration rules after water plugging of different side bottom water reservoir horizontal wells can be obtained; simultaneously, through the plugging agent injection device and a plurality of plugging agent ingress pipe assemblies, the same amount of plugging agent injection under the same pressure condition can be realized for the well sections of different horizontal well pipes under the same reservoir condition, the recovery efficiency is improved by analyzing each injection section, and the plugging agent injection position is optimized;
according to the invention, the plugging agent injection position can be adjusted by selecting the on-off of the plugging agent ingress pipe assembly at the corresponding position aiming at the specific oil reservoir; the plugging agent injection device can be adjusted to adjust the injection plugging agent amount to improve the water plugging effect of the horizontal well, so that production guidance can be provided for sectional water plugging of the horizontal well; the invention can simulate the water plugging process of the side bottom water reservoir horizontal well, and reveals the water plugging mechanism through the sectional liquid production metering and fluid migration characteristics, thereby providing guidance for the water plugging and water control operation of the low-permeability reservoir horizontal well.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural diagram of a sectional water shutoff physical simulation experiment device for a side bottom water reservoir horizontal well;
FIG. 2 is a schematic diagram of the internal structure of the reservoir simulator of the present invention;
1, an oil reservoir simulating device; 2. a horizontal well pipe; 3. a horizontal well solenoid valve; 4. a first side water inlet; 5. a second side water inlet; 6. a bottom water inlet; 7. a water supply network; 8. a first plunger double pump; 9. a first intermediate container; 10. a first six-way valve; 11. a second plunger double pump; 12. a second intermediate container; 13. a second six-way valve; 14. a first pressure gauge; 15. a second pressure gauge; 16. an oil outlet pipe; 17. a water outlet pipe; 18. a third plunger double pump; 19. a third intermediate container; 20. a third six-way valve; 21. a third pressure gauge; 22. an ingress pipe body; 23. the plugging agent is led into the electromagnetic valve; 24. the plugging agent is led into a solenoid valve controller; 25. producing a catheter body; 26. producing a conduit electromagnetic valve; 27. producing a catheter solenoid valve controller; 28. metering tube; 29. a pipeline; 30. a horizontal well solenoid valve controller.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Referring to fig. 1-2, the invention provides a side bottom water reservoir horizontal well subsection water shutoff physical simulation experiment device, which comprises:
the system comprises a side bottom water reservoir simulation system, a reservoir simulation device 1, an oil supply device and a water supply device; the bottom and two opposite side walls of the oil reservoir and reservoir simulation device 1 are provided with inlets; the three output ends of the oil supply device and the three output ends of the water supply device are respectively communicated with the three inlets;
the horizontal well and segment simulation system comprises a horizontal well pipe 2 and a plurality of horizontal well electromagnetic valves 3; a plurality of horizontal well electromagnetic valves 3 are arranged in the horizontal well pipe 2 at intervals; the horizontal well pipe 2 is arranged in the oil reservoir simulation device 1, and a horizontal section of the horizontal well pipe 2 is provided with a plurality of perforations; the perforations are symmetrically arranged along the horizontal section of the horizontal well pipe 2;
the plugging agent injection system comprises a plugging agent injection device and a plurality of plugging agent ingress pipe assemblies; one end of each plugging agent ingress pipe assembly is respectively communicated with the output end of the plugging agent injection device, and the other end of each plugging agent ingress pipe assembly is communicated with the horizontal well pipe 2;
the sectional metering system comprises a plurality of production conduit assemblies communicated with the horizontal well pipe 2, and metering monitoring assemblies are arranged at the wellhead of the production conduit assemblies and the wellhead of the horizontal well pipe 2; the production catheter assemblies and the plugging agent ingress pipe assemblies are arranged in a staggered manner;
by the arrangement, the oil supply device and the water supply device can respectively perform water injection and oil injection operations on the bottom and two side walls of the oil reservoir simulation device 1, and further the boundary surface is supplied by side water, bottom water and the like, so that the simulation of the side bottom water propulsion process is realized; by filling quartz sand with different particle sizes in the oil reservoir and reservoir simulation device 1 in layers, the influence of the longitudinal heterogeneity of the oil reservoir on the development and water shutoff process of the horizontal well can be simulated;
according to the invention, through the plugging agent injection device and the plurality of plugging agent ingress pipe assemblies, accurate segmented water plugging simulation of the horizontal well pipe 2 can be realized, further characterization and evaluation of oil-water migration rules after water plugging can be realized, and the side bottom water inrush characteristics, the plugging agent segmented injection characteristics and the oil-water migration rules after water plugging of different side bottom water reservoir horizontal wells can be obtained; simultaneously, through the plugging agent injection device and a plurality of plugging agent ingress pipe assemblies, the same amount of plugging agent injection under the same pressure condition can be realized for the well sections of different horizontal well pipes 2 under the same reservoir condition, the recovery efficiency is improved by analyzing each injection section, and the plugging agent injection position is optimized;
according to the invention, the plugging agent injection position can be adjusted by selecting the on-off of the plugging agent ingress pipe assembly at the corresponding position aiming at the specific oil reservoir; the plugging agent injection device can be adjusted to adjust the injection plugging agent amount to improve the water plugging effect of the horizontal well, so that production guidance can be provided for sectional water plugging of the horizontal well; the invention can simulate the water plugging process of the side bottom water reservoir horizontal well, and reveals the water plugging mechanism through the sectional liquid production metering and fluid migration characteristics, thereby providing guidance for the water plugging and water control operation of the low-permeability reservoir horizontal well.
In a further optimized scheme, the oil reservoir and reservoir simulation device 1 comprises a transparent box body for sand filling, wherein a first side water inlet 4 and a second side water inlet 5 are respectively formed in two opposite side walls of the transparent box body; the bottom of the transparent box body is provided with a bottom water inlet 6; three-way valves are arranged at the first side water inlet 4, the second side water inlet 5 and the bottom water inlet 6 and are used for being connected with pipelines;
the three output ends of the oil supply device are respectively communicated with a first side water inlet 4, a second side water inlet 5 and a bottom water inlet 6; three output ends of the water supply device are respectively communicated with a first side water inlet 4, a second side water inlet 5 and a bottom water inlet 6;
the side wall and the bottom wall of the transparent box body are provided with a water supply network 7, and the first side water inlet 4, the second side water inlet 5 and the bottom water inlet 6 are communicated with the inner cavity of the transparent box body through the water supply network 7; the top of the transparent box body is detachably connected with an end cover; the horizontal well pipe 2 is arranged in the transparent box body;
the end cover is provided with an avoidance opening for avoiding each pipeline, and each pipeline is sealed with the avoidance opening through threaded connection and a rubber ring;
the transparent box body is 50cm deep x 80cm long x 15cm wide, transparent quartz glass is adopted as the surrounding and bottom structures of the transparent box body, and high-strength quartz glass with the thickness of 8cm is adopted as the quartz glass; in the experimental process, the oil is dyed red by Sudan red, the stratum water is dyed blue by methylene blue after water shutoff, and the gel is dyed green by a coloring agent;
by the arrangement, the influence of bottom water and side water on the development process and the water plugging process of the horizontal well can be considered through the water supply network 7 of the bottom wall and the side wall; the gel propelling form in the segmented water shutoff process can be observed through the transparent box body; the migration path of the oil water and the usage rule of the residual oil after water shutoff can be observed, and the segmented water shutoff mechanism of the horizontal well can be comprehensively represented; through visual three-dimensional physical model setting, observation and characterization of plugging agent migration and oil-water migration process after plugging are realized.
According to the further optimization scheme, steel wire filter screens are paved in all holes, which are in contact with the sand filling, on the horizontal well pipe 2, the mesh number of the filter screens is larger than the maximum mesh number of the sand filling, the sand filling grains are prevented from entering all holes, and normal use of all parts is guaranteed.
Further optimizing scheme, the oil supply device comprises a first plunger double pump 8, a first intermediate container 9 and a first six-way valve 10; the water supply device comprises a second plunger double pump 11, a second intermediate container 12 and a second six-way valve 13; the first six-way valve 10 is provided with a first pressure gauge 14, and the second six-way valve 13 is provided with a second pressure gauge 15;
one end of the first intermediate container 9 is connected with the first plunger double pump 8, and the other end of the first intermediate container is connected with three oil outlet pipes 16 through a first six-way valve 10; one end of the second intermediate container 12 is connected with the second plunger double pump 11, and the other end is connected with three water outlet pipes 17 through a second six-way valve 13; the three oil outlet pipes 16 are respectively communicated with the first side water inlet 4, the second side water inlet 5 and the bottom water inlet 6; the three water outlet pipes 17 are respectively communicated with the first side water inlet 4, the second side water inlet 5 and the bottom water inlet 6;
the three oil outlet pipes 16, the first intermediate container 9, the first pressure gauge 14 and the first six-way valve 10 are assembled in a threaded connection mode; the three water outlet pipes 17, the second intermediate container 12, the second pressure gauge 15 and the second six-way valve 13 are assembled in a threaded connection mode.
In a further optimization scheme, three plugging agent ingress pipe assemblies are arranged; the plugging agent injection device comprises a third plunger double pump 18, a third intermediate container 19 and a third six-way valve 20, wherein a third pressure gauge 21 is arranged on the third six-way valve 20, one end of the third intermediate container 19 is connected with the third plunger double pump 18, and the other end of the third intermediate container is communicated with three plugging agent ingress pipe assemblies through the third six-way valve 20; the three plugging agent introduction pipe assemblies, the third intermediate container 19, the third pressure gauge 21 and the third six-way valve 20 are assembled in a threaded connection manner.
In a further optimized scheme, the plugging agent ingress pipe assembly comprises ingress pipe body 22 which is connected to the horizontal well pipe 2 in a threaded mode, the ingress pipe body 22 is communicated with the horizontal well pipe 2, a plugging agent ingress electromagnetic valve 23 is installed at one end, close to the horizontal well pipe 2, of the ingress pipe body 22, and the plugging agent ingress electromagnetic valve 23 is connected with a plugging agent ingress electromagnetic valve controller 24; the ends of the three inlet pipe bodies 22, which are far away from the horizontal well pipe 2, are all communicated with the third intermediate container 19 through a third six-way valve 20.
In a further optimized scheme, three production conduit assemblies are arranged, each production conduit assembly comprises a production conduit body 25 which is connected to the horizontal well pipe 2 in a threaded mode, a production conduit electromagnetic valve 26 is arranged at one end, close to the horizontal well pipe 2, of each production conduit, and the production conduit is communicated with the horizontal well pipe 2; the production conduit solenoid valve 26 is connected with a production conduit solenoid valve controller 27; the metering monitoring assembly is arranged at one end of the production conduit assembly far away from the horizontal well pipe 2; the three production conduit bodies 25 and the three introduction conduit bodies 22 are staggered.
In a further optimized scheme, four metering and monitoring assemblies are arranged, each metering and monitoring assembly comprises a metering pipe 28, and the four metering pipes 28 are respectively connected with the horizontal well pipe 2 and the three production conduit bodies 25 through pipelines 29; the metering tubes 28 are oil-water metering glass tubes with scales, so that an operator can read data conveniently.
In a further optimization scheme, three horizontal well electromagnetic valves 3 are arranged, and the three horizontal well electromagnetic valves 3 are installed in the horizontal well pipe 2 at intervals; the horizontal well solenoid valve 3 is connected with a horizontal well solenoid valve controller 30; three horizontal well electromagnetic valves 3, three plugging agent leading-in electromagnetic valves 23 and three production conduit electromagnetic valves 26 are arranged in a staggered manner; the automatic opening and closing and opening angles of the three horizontal well electromagnetic valves 3 are realized through the horizontal well electromagnetic valve controller 30, so that the working intensity of operators is reduced.
According to the further optimization scheme, the first plunger double pump 8, the second plunger double pump 11 and the third plunger double pump 18 are all ISCO plunger double pumps, so that the flow can be effectively increased, the load can be evenly shared, the abrasion of each component is reduced, and the overall service life of the pump is prolonged.
The invention also provides a sectional water shutoff physical simulation experiment method for the side bottom water reservoir horizontal well, which comprises the following steps:
step one, layering and sand filling are carried out in the oil reservoir and reservoir simulating device 1, and a horizontal well pipe 2 is paved in the oil reservoir and reservoir simulating device 1; by arranging the cracks in the sand filling, the influence of the cracks on the water channeling of the bottom water and the water plugging of the horizontal well can be studied;
step two, saturated simulated formation water: opening a plurality of horizontal well electromagnetic valves 3 and a plurality of production conduit assemblies, and injecting simulated formation water into the oil deposit reservoir simulation device 1 through a bottom inlet of the oil deposit reservoir simulation device 1 by a water supply device to saturate;
step three, saturated simulated formation oil: injecting simulated formation oil into the oil reservoir simulating device 1 through the bottom inlet of the oil reservoir simulating device 1 by the oil supply device, recording the liquid production amounts of the production conduit assemblies, and stopping injecting oil until the production conduit assemblies are not discharged; in the experimental process, the oil is dyed red by Sudan red, the stratum water is dyed blue by methylene blue after water shutoff, and the gel is dyed green by a coloring agent, so that the observation is convenient;
closing a bottom inlet of the reservoir simulating device and a plurality of production conduit assemblies;
injecting simulated formation water into the oil reservoir simulating device 1 through a bottom inlet of the oil reservoir simulating device 1 by a water supply device to perform bottom water flooding, and starting a production conduit assembly to perform oil extraction;
step six, starting a production conduit assembly positioned at the left side, recording the liquid production amount and the water production amount of the production conduit assembly through a metering and monitoring assembly, calculating the water production amount of the production conduit assembly and the water production amount of an oil reservoir, and observing the bottom water propulsion law;
step seven, when the oil reservoir water yield is 80%, closing the left outlet of the horizontal well pipe 2; closing a production conduit electromagnetic valve 26 of the left production conduit assembly to stop oil production, recording the sectional liquid production speed and water content, and keeping the constant pressure of the supply end;
step eight, water blocking in sections: filling the prepared chemical plugging agent into an intermediate container, opening a plugging agent introduction electromagnetic valve 23 corresponding to an injection section according to a set sectional water shutoff strategy, closing three horizontal well electromagnetic valves 3, other two plugging agent introduction electromagnetic valves 23 and three production conduit electromagnetic valves 26, and injecting the plugging agent into the reservoir stratum simulation device 1 through a plugging agent injection device and a selected plugging agent introduction pipe assembly; observing the pushing form in the plugging agent injection process after the plugging agent is injected, and taking a picture;
in the embodiment, three horizontal well electromagnetic valves 3 are arranged, and the three horizontal well electromagnetic valves 3 are installed in the horizontal well pipe 2 at intervals; the horizontal well solenoid valve 3 is connected with a horizontal well solenoid valve controller 30; three horizontal well electromagnetic valves 3, three plugging agent leading-in electromagnetic valves 23 and three production conduit electromagnetic valves 26 are arranged in a staggered manner;
setting a first horizontal well electromagnetic valve, a second horizontal well electromagnetic valve and a third horizontal well electromagnetic valve which are sequentially arranged from the head to the tail of the horizontal well pipe 2 of the three horizontal well electromagnetic valves 3;
setting a sectional water shutoff strategy comprising middle section shutoff, tail section shutoff and head section shutoff;
when the head section is plugged, the horizontal well electromagnetic valve 3 positioned at the head, namely a first horizontal well electromagnetic valve, is closed;
when the middle section is plugged, closing two horizontal well electromagnetic valves 3 positioned at the head and the middle section in the three horizontal well electromagnetic valves 3, namely a first horizontal well electromagnetic valve and a second horizontal well electromagnetic valve;
when the tail section is plugged, all the horizontal well electromagnetic valves 3, namely a first horizontal well electromagnetic valve, a second horizontal well electromagnetic valve and a third horizontal well electromagnetic valve, are closed;
stopping injection after the set injection amount of the plugging agent is reached, closing the plugging agent injection device and the plugging agent introduction electromagnetic valve 23, and recording the sectional liquid production speed and the sectional water content; in this embodiment, the plugging agent injection amount is set to be preferably 0.05PV, and 1PV refers to the total pore volume (unit PV) of the reservoir simulation device 1;
step ten, starting the production conduit assembly and the horizontal well electromagnetic valve 3 to perform sectional oil extraction, continuing to produce until the oil reservoir water yield is 90%, closing the production conduit assembly to stop oil production, and ending the test; simultaneously drawing a curve of the oil reservoir water yield along with the accumulated oil production time; drawing a full life cycle production dynamic curve of an oil reservoir, drawing a plugging agent migration profile curve, analyzing the liquid production capacity change, the sectional water production rate and the overall water content change of a horizontal well before and after water plugging, characterizing the oil-water migration path after water plugging, defining the sectional water plugging mechanism, and quantifying the water plugging effect.
In the second step, the water supply device injects simulated stratum water into the oil reservoir simulating device 1 through the bottom inlet of the oil reservoir simulating device 1 at the speed of 2ml/min for saturation, and the injection is stopped and the bottom inlet of the oil reservoir simulating device is closed when the injection amount is 2 PV;
in the third step, the oil supply device injects simulated formation oil into the reservoir simulating device 1 through the bottom inlet of the reservoir simulating device 1 at a speed of 2 ml/min.
In a further optimized solution, in the step ten, different times t(s) are recorded, and three metering tubes 28 connected with the three production conduit bodies 25 are set to be a first metering tube, a second metering tube and a third metering tube respectively;
recording the liquid yield V of the first metering tube 1t (ml) Water yield V 1wt (ml), liquid yield V of the second metering tube 2t (ml) Water yield V 2wt (ml), third metering tube liquid yield V 3t (ml) Water yield V 3wt (ml), the water production rates f of the three production catheter bodies 25 were calculated by the following formulas, respectively 1w (％)、f 2w (％)、f 3w (%) and oil reservoir water yield f w (%) and observing the edge bottom water propelling rule;
f 1w ＝(V 1wt+1 -V 1wt )/(V 1t+1 -V 1t )*100
f 2w ＝(V 2wt+1 -V 2wt )/(V 2t+1 -V 2t )*100
f 3w ＝(V 3wt+1 -V 3wt )/(V 3t+1 -V 3t )*100
f w ＝(V 1wt+1 +V 2wt+1 +V 3wt+1 -V 1wt –V 2wt –V 3wt )/(V 1t+1 +V 2t+1 +V 3t+1 -
V 1t –V 2t –V 3t )*100
(2) when the oil reservoir yield f w At =90%, the production tubing assembly is closed to stop producing oil, and the test is ended;
in a further optimization scheme, in the step six, different times t(s) are recorded, and three metering tubes 28 connected with three production conduit bodies 25 are respectively set to be a first metering tube, a second metering tube and a third metering tube;
recording the liquid yield V of the first metering tube 1t (ml) Water yield V 1wt (ml), liquid yield V of the second metering tube 2t (ml) Water yield V 2wt (ml), third metering tube liquid yield V 3t (ml) Water yield V 3wt (ml), the water production rates f of the three production catheter bodies 25 were calculated by the following formulas, respectively 1w (％)、f 2w (％)、f 3w (%) and oil reservoir water yield f w (%) and observing the edge bottom water propelling rule;
f 1w ＝(V 1wt+1 -V 1wt )/(V 1t+1 -V 1t )*100
f 2w ＝(V 2wt+1 -V 2wt )/(V 2t+1 -V 2t )*100
f 3w ＝(V 3wt+1 -V 3wt )/(V 3t+1 -V 3t )*100
f w ＝(V 1wt+1 +V 2wt+1 +V 3wt+1 -V 1wt –V 2wt –V 3wt )/(V 1t+1 +V 2t+1 +V 3t+1 -
V 1t –V 2t –V 3t )*100；
in the seventh step, when the oil reservoir water production rate f w At =80%, the production tubing assembly was closed to stop oil production and the feed end was maintained at constant pressure.
In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (10)
1. The utility model provides a limit bottom water reservoir horizontal well segmentation water shutoff physical simulation experiment device which characterized in that includes:
the system comprises a side bottom water oil reservoir simulation system, an oil reservoir simulation device (1), an oil supply device and a water supply device; the bottom and two opposite side walls of the oil reservoir and reservoir simulation device (1) are provided with inlets; the three output ends of the oil supply device and the three output ends of the water supply device are respectively communicated with the three inlets;
the horizontal well and segment simulation system comprises a horizontal well pipe (2) and a plurality of horizontal well electromagnetic valves (3); a plurality of horizontal well electromagnetic valves (3) are arranged in the horizontal well pipe (2) at intervals; the horizontal well pipe (2) is arranged in the oil reservoir simulating device (1), and a horizontal section of the horizontal well pipe (2) is provided with a plurality of perforations;
the plugging agent injection system comprises a plugging agent injection device and a plurality of plugging agent ingress pipe assemblies; one end of each plugging agent ingress pipe assembly is respectively communicated with the output end of each plugging agent ingress device, and the other end of each plugging agent ingress pipe assembly is communicated with the horizontal well pipe (2);
the sectional metering system comprises a plurality of production conduit assemblies communicated with the horizontal well pipe (2), and metering monitoring assemblies are arranged at the wellhead of the production conduit assemblies and the wellhead of the horizontal well pipe (2); the production conduit assemblies and the plugging agent ingress pipe assemblies are arranged in a staggered mode.
2. The side bottom water reservoir horizontal well segment water shutoff physical simulation experiment device according to claim 1, wherein: the oil reservoir and reservoir simulation device (1) comprises a transparent box body for filling sand, wherein a first side water inlet (4) and a second side water inlet (5) are respectively formed in two opposite side walls of the transparent box body; a bottom water inlet (6) is formed in the bottom of the transparent box body; three output ends of the oil supply device are respectively communicated with the first side water inlet (4), the second side water inlet (5) and the bottom water inlet (6); three output ends of the water supply device are respectively communicated with the first side water inlet (4), the second side water inlet (5) and the bottom water inlet (6);
the side wall and the bottom wall of the transparent box body are respectively provided with a water supply network (7), and the first side water inlet (4), the second side water inlet (5) and the bottom water inlet (6) are respectively communicated with the inner cavity of the transparent box body through the water supply network (7); an end cover is detachably connected to the top of the transparent box body; the horizontal well pipe (2) is arranged in the transparent box body.
3. The side bottom water reservoir horizontal well segment water shutoff physical simulation experiment device according to claim 2, wherein: the oil supply device comprises a first plunger double pump (8), a first intermediate container (9) and a first six-way valve (10); the water supply device comprises a second plunger double pump (11), a second intermediate container (12) and a second six-way valve (13); a first pressure gauge (14) is arranged on the first six-way valve (10), and a second pressure gauge (15) is arranged on the second six-way valve (13);
one end of the first intermediate container (9) is connected with the first plunger double pump (8), and the other end of the first intermediate container is connected with three oil outlet pipes (16) through the first six-way valve (10); one end of the second intermediate container (12) is connected with the second plunger double pump (11), and the other end of the second intermediate container is connected with three water outlet pipes (17) through the second six-way valve (13); the three oil outlet pipes (16) are respectively communicated with the first side water inlet (4), the second side water inlet (5) and the bottom water inlet (6); the three water outlet pipes (17) are respectively communicated with the first side water inlet (4), the second side water inlet (5) and the bottom water inlet (6).
4. The side bottom water reservoir horizontal well segment water shutoff physical simulation experiment device according to claim 1, wherein: the plugging agent ingress pipe assembly is provided with three plugging agent ingress pipe assemblies; the plugging agent injection device comprises a third plunger double pump (18), a third intermediate container (19) and a third six-way valve (20), wherein a third pressure gauge (21) is installed on the third six-way valve (20), one end of the third intermediate container (19) is connected with the third plunger double pump (18), and the other end of the third intermediate container is communicated with three plugging agent ingress pipe assemblies through the third six-way valve (20).
5. The side bottom water reservoir horizontal well segment water shutoff physical simulation experiment device according to claim 4, wherein: the plugging agent ingress pipe assembly comprises ingress pipe bodies (22) which are connected to the horizontal well pipe (2) in a threaded mode, the ingress pipe bodies (22) are communicated with the horizontal well pipe (2), plugging agent ingress electromagnetic valves (23) are installed at one ends, close to the horizontal well pipe (2), of the ingress pipe bodies (22), and the plugging agent ingress electromagnetic valves (23) are connected with plugging agent ingress electromagnetic valve controllers (24); and one ends of the three ingress pipe bodies (22) which are far away from the horizontal well pipe (2) are communicated with the third intermediate container (19) through the third six-way valve (20).
6. The side bottom water reservoir horizontal well segment water shutoff physical simulation experiment device according to claim 5, wherein: the production conduit assembly comprises three production conduit bodies (25) which are connected to the horizontal well pipe (2) in a threaded mode, a production conduit electromagnetic valve (26) is arranged at one end, close to the horizontal well pipe (2), of each production conduit, and the production conduit is communicated with the horizontal well pipe (2); the production conduit electromagnetic valve (26) is connected with a production conduit electromagnetic valve controller (27); the metering monitoring assembly is arranged at one end of the production conduit assembly far away from the horizontal well pipe (2); the three production catheter bodies (25) and the three ingress catheter bodies (22) are arranged in a staggered manner.
7. The side bottom water reservoir horizontal well segment water shutoff physical simulation experiment device according to claim 6, wherein: the four metering monitoring assemblies are arranged and comprise metering pipes (28), and the four metering pipes (28) are respectively connected with the horizontal well pipe (2) and the three production conduit bodies (25) through pipelines (29).
8. The side bottom water reservoir horizontal well segment water shutoff physical simulation experiment device of claim 7, wherein: three horizontal well electromagnetic valves (3) are arranged, and the three horizontal well electromagnetic valves (3) are installed in the horizontal well pipe (2) at intervals; the horizontal well electromagnetic valve (3) is connected with a horizontal well electromagnetic valve controller (30); the three electromagnetic valves (3) of the horizontal well, the three electromagnetic valves (23) for introducing the plugging agent and the three electromagnetic valves (26) of the production conduit are staggered.
9. A side bottom water reservoir horizontal well segment water shutoff physical simulation experiment method based on the side bottom water reservoir horizontal well segment water shutoff physical simulation experiment device as set forth in any one of claims 1-8, comprising the steps of:
step one, layering and sand filling are carried out in an oil reservoir and reservoir simulating device (1), and a horizontal well pipe (2) is paved in the oil reservoir and reservoir simulating device (1);
step two, saturated simulated formation water: opening a plurality of horizontal well electromagnetic valves (3) and a plurality of production conduit assemblies, and injecting simulated formation water into the oil reservoir simulation device (1) through a bottom inlet of the oil reservoir simulation device (1) through a water supply device to saturate;
step three, saturated simulated formation oil: injecting simulated formation oil into the oil reservoir simulating device (1) through the bottom inlet of the oil reservoir simulating device (1) by the oil supply device, and recording the liquid production amounts of a plurality of production conduit assemblies until the production conduit assemblies do not produce water and stopping oil injection;
closing a bottom inlet of the reservoir simulating device and a plurality of production conduit assemblies;
injecting simulated formation water into the oil reservoir simulating device (1) through a bottom inlet of the oil reservoir simulating device (1) by a water supply device to perform bottom water oil displacement, and starting a production conduit assembly to perform oil extraction;
step six, starting a production conduit assembly positioned at the left side, recording the liquid production amount and the water production amount of the production conduit assembly through a metering and monitoring assembly, calculating the water production amount of the production conduit assembly and the water production amount of an oil reservoir, and observing the bottom water propulsion law;
step seven, when the oil reservoir water yield is 80%, closing the left outlet of the horizontal well pipe (2); closing the production conduit assembly positioned at the left side to stop oil production, recording the sectional liquid production speed and water content, and keeping the constant pressure of the supply end;
step eight, water blocking in sections: filling the prepared chemical plugging agent into an intermediate container, opening a plugging agent introduction electromagnetic valve (23) corresponding to an injection section according to a set sectional water shutoff strategy, closing three horizontal well electromagnetic valves (3), other two plugging agent introduction electromagnetic valves (23) and three production conduit electromagnetic valves (26), and injecting the plugging agent into the reservoir stratum simulation device (1) through a plugging agent injection device and a selected plugging agent introduction pipe assembly; observing the pushing form in the plugging agent injection process after the plugging agent is injected, and taking a picture;
stopping injection after the set injection amount of the plugging agent is reached, closing the plugging agent injection device and the plugging agent introduction electromagnetic valve (23), and recording the sectional liquid production speed and the sectional water content;
step ten, starting a production conduit assembly and a horizontal well electromagnetic valve (3) to perform sectional oil extraction, continuing to produce until the oil reservoir water yield is 90%, closing the production conduit assembly to stop oil production, and ending the test; and simultaneously drawing a curve of the oil reservoir water yield along with the accumulated oil production time.
10. The method for simulating the physical modeling of the segmented water plugging of the horizontal well of the side bottom water reservoir according to claim 9, wherein the method comprises the following steps of: in the second step, the water supply device injects simulated formation water into the oil reservoir simulating device (1) through the bottom inlet of the oil reservoir simulating device (1) at a speed of 2ml/min for saturation, and the injection is stopped and the bottom inlet of the oil reservoir simulating device is closed when the injection amount is 2 PV;
in the third step, the oil supply device injects simulated formation oil into the oil reservoir simulating device (1) through the bottom inlet of the oil reservoir simulating device (1) at a speed of 2 ml/min.
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