CN116201537B - Petroleum recovery experimental system - Google Patents
Petroleum recovery experimental system Download PDFInfo
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- CN116201537B CN116201537B CN202310226748.2A CN202310226748A CN116201537B CN 116201537 B CN116201537 B CN 116201537B CN 202310226748 A CN202310226748 A CN 202310226748A CN 116201537 B CN116201537 B CN 116201537B
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- 238000004391 petroleum recovery Methods 0.000 title abstract description 19
- 239000011435 rock Substances 0.000 claims abstract description 92
- 238000002474 experimental method Methods 0.000 claims abstract description 87
- 238000006073 displacement reaction Methods 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 238000009489 vacuum treatment Methods 0.000 claims abstract description 6
- 239000010410 layer Substances 0.000 claims description 33
- 239000012530 fluid Substances 0.000 claims description 31
- 238000011084 recovery Methods 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 230000000087 stabilizing effect Effects 0.000 claims description 9
- 239000002699 waste material Substances 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 7
- 239000011229 interlayer Substances 0.000 claims description 4
- 238000012360 testing method Methods 0.000 abstract description 12
- 230000035699 permeability Effects 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 description 17
- 238000005755 formation reaction Methods 0.000 description 17
- 239000003921 oil Substances 0.000 description 17
- 238000000034 method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 230000005684 electric field Effects 0.000 description 4
- 230000002457 bidirectional effect Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 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
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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
- 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
-
- 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
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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
- E21B47/00—Survey of boreholes or wells
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Geophysics (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
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- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The invention relates to the technical field of petroleum recovery experiments, and discloses a petroleum recovery experiment system, which comprises: the experimental box is internally provided with experimental rock stratum for experiments, two sides of the experimental box are provided with guide plates, and the guide plates are communicated with the rock stratum of the experimental rock stratum; the vacuum module is used for carrying out vacuum treatment in the experimental box and is communicated with the guide plates at two sides of the experimental rock layer through a guide pipe; the back pressure module is used for steady state back pressure of the tail end of the experimental rock stratum, and the petroleum recovery ratio experimental system can realize the tests of the permeability of the liquid of the experimental rock stratum, the resistivity reduction of the fracturing liquid and the flow conductivity of the crack of the propping agent through the cooperation of the vacuum module, the back pressure module, the displacement module, the fracturing experimental module, the guide disc and the experimental box, so that the multi-aspect data information of the experimental rock stratum can be obtained at one time, and the petroleum recovery ratio is improved through the analysis of the data information.
Description
Technical Field
The invention relates to the technical field of petroleum recovery experiments, in particular to a petroleum recovery experiment system.
Background
The petroleum recovery ratio refers to the ratio of the quantity of the extracted crude oil to the original address reserves of the oil reservoir, and some unconventional oil and gas resources are stored in the rock stratum and are difficult to collect in a conventional mode, so that multiple times of petroleum recovery are needed by adopting modes such as displacement, fracturing and the like, the flow of each phase of fluid of oil, gas and water in a porous rock and the oil and gas recovery condition are researched through experiments, the method is a main way for simulating the oil displacement process in actual oil field exploitation, the permeability, fracturing parameters, the diversion capacity of propping agents and the like of the stratum can be simulated and obtained, and the recovery mode is changed according to the obtained parameters so as to improve the petroleum recovery ratio.
The existing petroleum recovery experiment system has single function, can only perform displacement experiments on the experimental rock stratum, or perform resistivity reduction test on a fracturing fluid conveying pipeline, is inconvenient to perform one-time test on various parameters of the experimental rock stratum, can influence the result of parameter test of the experimental rock stratum, and needs to take out the experimental rock stratum and readjust the direction when the existing experiment system performs bidirectional experiments on the experimental rock stratum, so that the test process of the experimental rock stratum is troublesome.
Disclosure of Invention
In order to solve the problems that the existing petroleum recovery experiment system has single function, can only perform displacement experiments on experimental rock formations, or perform resistivity-lowering tests on a fracturing fluid conveying pipeline, is inconvenient to perform one-time tests on various parameters of the experimental rock formations, can influence the results of parameter tests on the experimental rock formations, and needs to take out and readjust the experimental rock formations when the existing experiment system performs bidirectional experiments on the experimental rock formations, the experimental rock formation testing process is troublesome, the invention is realized by the following technical scheme: an oil recovery experimental system comprising:
The experimental box is internally provided with experimental rock stratum for experiments, two sides of the experimental box are provided with guide plates, and the guide plates are communicated with the rock stratum of the experimental rock stratum;
the vacuum module is used for carrying out vacuum treatment in the experimental box and is communicated with the guide plates at two sides of the experimental rock layer through a guide pipe;
The back pressure module is used for steady-state back pressure of the tail end of the experimental rock stratum, the back pressure module is communicated with the guide disc of the tail end of the experimental rock stratum through a guide pipe, the head end and the tail end of the experimental rock stratum are determined along the direction that experimental fluid passes through the experimental rock stratum, and a back pressure sensor is arranged in the guide pipe of the back pressure module;
The displacement module is used for a displacement experiment of the experimental rock stratum and is communicated with a guide disc at the head end of the experimental rock stratum through a guide pipe;
The fracturing experiment module is used for a fracturing experiment of an experimental rock stratum, the fracturing experiment module is communicated with a guide disc at the head end of the experimental rock stratum through a guide pipe, and a pressure sensor is arranged in the guide pipe of the fracturing experiment module;
And a reversing module for controlling the flow direction of fluid in the guide pipe is arranged in the guide pipe connected with the guide plate by the vacuum module, the back pressure module, the displacement module and the fracturing experiment module.
Further, the vacuum module comprises a vacuum pump and a filter, wherein the filter is arranged in a backflow conduit connected with the guide plate by the vacuum pump.
Further, the back pressure module comprises a back pressure pump, a buffer container and a back pressure valve, wherein the buffer container and the back pressure valve are arranged in a conduit connected with the guide disc through the back pressure pump.
Further, the displacement module comprises an experiment liquid box, a liquid injection pump and a plurality of piston containers, wherein the plurality of piston containers are arranged in parallel in a guide pipe connected with the liquid injection pump and the guide plate, and the output end of the liquid injection pump is provided with a pressure sensor.
Further, the fracturing experiment module comprises:
the fracturing fluid tank is characterized in that a plurality of groups of conveying pipes of different specifications and types are arranged at the output end of the fracturing fluid tank, each group of conveying pipes of different specifications and types comprises different pipe diameters, different pipe materials and different pipe material lengths, the conveying pipes are connected with the guide pipe through the reversing module, and pressure sensing modules are arranged at two ends of the conveying pipes;
And two ends of the propping agent diversion pump are respectively connected with the diversion plates at two sides of the experimental stratum, and the propping agent diversion pump is connected with the propping agent box.
Further, the method further comprises the following steps:
the waste liquid box, be equipped with the pipeline between the waste liquid box with the pipe that the guide plate of fracturing fluid box and experimental formation tail end is connected is equipped with the pipeline between the pipe that is connected with the guide plate of proppant guide pump and experimental formation tail end, all be equipped with the solenoid valve in the pipeline, utilize the flow direction of fluid in the guide plate surface pipe of solenoid valve control experimental formation tail end.
Further, two ends of the inside of the reversing module are respectively provided with a conical end, the tip end of each conical end is provided with a jacking block, the inside of each jacking block is provided with a through hole, the through holes are communicated to the outside of one end of the reversing module through an output pipe, the jacking blocks in the two groups of the conical ends are communicated through a connecting pipe, and one end, far away from the connecting pipe, of the reversing module is provided with an opening;
The inside of the reversing module is axially and slidably provided with a guide post, the guide post is positioned between two groups of conical ends, both ends of the guide post are provided with conical grooves, the conical grooves correspond to the conical ends, a conveying port is arranged in the conical grooves, a one-way valve is arranged in the conveying port, and the conveying port corresponds to the jacking block;
the surface of guide post has seted up the input port, the inside of guide post is equipped with the cavity, the input port with the cavity communicates with each other, the surface of reversing module is equipped with import pipe and back flow, import pipe and back flow can with the input port looks adaptation.
Further, a control mechanism for driving the guide post to move is arranged on the surface of the reversing module, and the control mechanism comprises:
the rotating wheel is rotatably arranged on the surface of the reversing module, an eccentric disc coaxially connected with the rotating wheel is arranged in the reversing module, and a driving motor for driving the rotating wheel to rotate is arranged on the surface of the reversing module;
The pushing block is positioned on the surface of the guide post and positioned on the side surface of the eccentric disc.
Further, electrode plates are arranged between two sides of the experimental rock layer and the guide plate, through holes are formed in the surfaces of the electrode plates, guide wires are arranged on the surfaces of the electrode plates, the guide wires are connected with a power supply, and an insulating interlayer is arranged on the inner side wall of the experimental box.
Further, the method further comprises the following steps:
The pressure stabilizing module comprises a confining pressure pump and a confining pressure pipe, the confining pressure pump is communicated with the inside of the experiment box through the confining pressure pipe, and a pressure sensor is arranged in the experiment box;
The temperature control module is internally provided with a temperature controller, the temperature controller is connected with the inside of the experiment box, and a temperature sensor is arranged in the experiment box;
and the flowmeter is arranged in the guide pipe on the surface of the guide plate.
Compared with the prior art, the invention has the following beneficial effects:
1. According to the petroleum recovery ratio experiment system, the vacuum module, the back pressure module, the displacement module and the fracturing experiment module are matched with the guide plate and the experiment box, so that the permeability of experimental rock stratum liquid, the resistivity of the fracturing liquid and the fracture conductivity of the propping agent can be tested, the multi-aspect data information of the experimental rock stratum can be obtained at one time, and the petroleum recovery ratio can be improved through analysis of the data information.
2. This oil recovery ratio experimental system through the cooperation design of inside two sets of toper ends of switching-over module and guide post to and the cooperation of kicking block and guide post inside delivery port and check valve is used in the toper end, can adjust fluidic direction of delivery in import pipe and the back flow, thereby can carry out two-way experiment test to experimental formation, need not to take out experimental formation and place again, experimental formation two-way experiment convenient operation.
Drawings
FIG. 1 is a schematic diagram of a petroleum recovery experiment system according to the present invention;
FIG. 2 is a schematic diagram of a petroleum recovery experimental system according to the present invention;
FIG. 3 is a schematic diagram of the internal structure of the experimental box of the invention;
FIG. 4 is a schematic diagram of the internal structure of the reversing module according to the present invention;
FIG. 5 is a schematic diagram of the internal structure of the reversing module according to the present invention;
fig. 6 is a schematic diagram of the internal structure of the reversing module according to the third embodiment of the present invention;
FIG. 7 is a schematic diagram of a control mechanism according to the present invention.
In the figure: 1. an experiment box; 11. an insulating interlayer; 2. experimental rock formation; 3. an electrode plate; 31. a lead wire; 4. a power supply; 5. a guide plate; 6. a vacuum pump; 61. a filter; 7. a return pressure pump; 71. a buffer container; 72. a back pressure valve; 8. an experiment liquid box; 81. a liquid injection pump; 82. a piston container; 9. a fracturing fluid tank; 91. a delivery tube; 92. a pressure sensing module; 10. a proppant diversion pump; 12. a reversing module; 121. a tapered end; 1211. a top block; 122. an output pipe; 123. a connecting pipe; 124. a guide post; 1241. a delivery port; 1242. a one-way valve; 1243. an input port; 125. an inlet pipe; 126. a return pipe; 13. an electromagnetic valve; 14. a voltage stabilizing module; 15. a temperature control module; 16. a flow meter; 17. a waste liquid tank; 18. a rotating wheel; 181. an eccentric disc; 182. a pushing block; 19. and driving the motor.
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.
Examples of the oil recovery experimental system are as follows:
Embodiment one:
referring to fig. 1-6, an oil recovery experimental system, comprising:
Experiment rock layer 2 for experiments is placed in experiment case 1, and the both sides of experiment case 1 are provided with guide plate 5, and guide plate 5 communicates with each other with the rock layer of experiment rock layer 2, is equipped with electrode plate 3 between experiment rock layer 2 both sides and the guide plate 5, and the through-hole has been seted up on the surface of electrode plate 3, and the surface of electrode plate 3 is equipped with wire 31, and wire 31 is connected with power 4, and the inside wall of experiment case 1 is equipped with insulating interlayer 11.
The vacuum module is used for vacuum treatment in the experimental box 1, the vacuum module is communicated with the guide plates 5 on two sides of the experimental rock layer 2 through a guide pipe, the vacuum module comprises a vacuum pump 6 and a filter 61, and the filter 61 is arranged in a backflow guide pipe connected with the guide plates 5 through the vacuum pump 6.
The back pressure module is used for steady state back pressure of the tail end of the experimental rock layer 2, the back pressure module is communicated with the guide disc 5 of the tail end of the experimental rock layer 2 through a guide pipe, the head end and the tail end of the experimental rock layer 2 are determined along the direction of experimental fluid passing through the experimental rock layer 2, a back pressure sensor is arranged in the guide pipe of the back pressure module, the back pressure module comprises a back pressure pump 7, a buffer container 71 and a back pressure valve 72, and the buffer container 71 and the back pressure valve 72 are arranged in the guide pipe connected with the guide disc 5 through the back pressure pump 7.
The displacement module is used for a displacement experiment of the experimental rock stratum 2, the displacement module is communicated with the guide plate 5 at the head end of the experimental rock stratum 2 through a guide pipe, the displacement module comprises an experimental liquid box 8, a liquid injection pump 81 and a plurality of piston containers 82, the plurality of piston containers 82 are arranged in parallel, the plurality of piston containers 82 are arranged in the guide pipe connected with the guide plate 5 through the liquid injection pump 81, and a pressure sensor is arranged at the output end of the liquid injection pump 81.
The fracturing experiment module for the fracturing experiment of experimental formation 2, the fracturing experiment module is equipped with pressure sensor through pipe and the guide plate 5 intercommunication of experimental formation 2 head end in the pipe of fracturing experiment module, and the fracturing experiment module includes: the fracturing fluid tank 9, the output end of the fracturing fluid tank 9 is provided with a plurality of groups of conveying pipes 91 with different specifications and types, the conveying pipes 91 with different specifications and types comprise different pipe diameters, different pipes and different pipe lengths, the conveying pipes 91 are connected with the guide pipes through reversing modules 12, and both ends of the conveying pipes 91 are provided with pressure sensing modules 92; and the two ends of the propping agent diversion pump 10 are respectively connected with the diversion plates 5 at the two sides of the experimental rock layer 2, and the propping agent diversion pump 10 is connected with the propping agent box.
The vacuum module, the back pressure module, the displacement module and the fracturing experiment module are connected with the guide disc 5, and a reversing module 12 for controlling the flow direction of fluid in the guide tube is arranged in the guide tube.
The waste liquid tank 17, be equipped with the pipeline between the pipe that waste liquid tank 17 and fracturing fluid tank 9 and the guide plate 5 of experiment stratum 2 tail end are connected, be equipped with the pipeline between the pipe that is connected with the guide plate 5 of proppant guide pump 10 and experiment stratum 2 tail end, all be equipped with solenoid valve 13 in the pipeline, utilize solenoid valve 13 control experiment stratum 2 tail end's guide plate 5 surface pipe fluid flow direction.
The pressure stabilizing module 14, the pressure stabilizing module 14 includes enclosing pressure pump and enclosing pressure pipe, and enclosing pressure pump passes through enclosing pressure pipe and the inside intercommunication of experimental box 1, and experimental box 1 inside is equipped with pressure sensor.
The temperature control module 15, be equipped with temperature controller in the temperature control module 15, temperature controller and the internal connection of experimental box 1 are equipped with temperature sensor in the inside of experimental box 1.
A flow meter 16 is provided in the conduit on the surface of the docking tray 5.
Embodiment two:
referring to fig. 1-7, an oil recovery experimental system, comprising:
Experiment case 1, experiment rock layer 2 for experiments has been placed to the inside of experiment case 1, and the both sides of experiment case 1 are provided with guide plate 5, and guide plate 5 communicates with each other with the rock layer of experiment rock layer 2.
The vacuum module is used for vacuum treatment in the experimental box 1 and is communicated with the guide plates 5 on two sides of the experimental rock layer 2 through a guide pipe.
The back pressure module is used for steady state back pressure of the tail end of the experimental rock layer 2, the back pressure module is communicated with the guide disc 5 of the tail end of the experimental rock layer 2 through a guide pipe, the head end and the tail end of the experimental rock layer 2 are determined along the direction of the experimental fluid passing through the experimental rock layer 2, and a back pressure sensor is arranged in the guide pipe of the back pressure module.
And the displacement module is used for a displacement experiment of the experimental rock layer 2 and is communicated with the guide disc 5 at the head end of the experimental rock layer 2 through a guide pipe.
The fracturing experiment module is used for the fracturing experiment of the experimental rock layer 2, and is communicated with the guide disc 5 at the head end of the experimental rock layer 2 through a guide pipe, and a pressure sensor is arranged in the guide pipe of the fracturing experiment module.
The vacuum module, the back pressure module, the displacement module and the fracturing experiment module are connected with the guide disc 5, and a reversing module 12 for controlling the flow direction of fluid in the guide tube is arranged in the guide tube.
Both ends inside the reversing module 12 are provided with conical ends 121, the tip end of the conical end 121 is provided with a top block 1211, the inside of the top block 1211 is provided with a through hole, the through hole is communicated to the outside of one end of the reversing module 12 through an output pipe 122, the top blocks 1211 in the two groups of conical ends 121 are communicated through a connecting pipe 123, and one end, far away from the connecting pipe 123, of the reversing module 12 is provided with an opening;
The guide post 124 is axially and slidably arranged in the reversing module 12, the guide post 124 is positioned between the two groups of conical ends 121, conical grooves are formed in two ends of the guide post 124 and correspond to the conical ends 121, a conveying port 1241 is formed in the conical grooves, a one-way valve 1242 is arranged in the conveying port 1241, and the conveying port 1241 corresponds to the top block 1211;
The surface of the guide post 124 is provided with an input port 1243, the inside of the guide post 124 is provided with a cavity, the input port 1243 is communicated with the cavity, the surface of the reversing module 12 is provided with an inlet pipe 125 and a return pipe 126, and the inlet pipe 125 and the return pipe 126 can be matched with the input port 1243.
The surface of the reversing module 12 is provided with a control mechanism for driving the guide post 124 to move, the control mechanism comprising: the rotating wheel 18 is rotatably arranged on the surface of the reversing module 12, an eccentric disc 181 which is coaxially connected with the rotating wheel 18 is arranged in the reversing module 12, and a driving motor 19 for driving the rotating wheel 18 to rotate is arranged on the surface of the reversing module 12; the pushing block 182 is located on the surface of the guide post 124, and the pushing block 182 is located on the side surface of the eccentric disc 181.
The working principle of the petroleum recovery experimental system is as follows:
when the petroleum recovery ratio of a certain rock stratum is required to be analyzed, a corresponding rock stratum sample is taken as an experimental rock stratum 2, the experimental rock stratum 2 is placed in an experimental box 1, and after the experimental rock stratum 2 is fixed, the electrode plates 3 and the guide plates 5 are sequentially arranged on two sides of the experimental rock stratum 2.
When the displacement experiment is carried out on the experimental rock stratum 2, the vacuum treatment can be carried out on the inside of the experimental box 1 by starting the vacuum pump 6 in the vacuum module, the ambient pressure of the experimental rock stratum 2 in the experimental box 1 is regulated and maintained by using the confining pressure pump in the pressure stabilizing module 14, meanwhile, the back pressure of the tail end of the fluid flowing direction when the experimental rock stratum 2 is tested is set by using the back pressure pump 7 in the back pressure module, then the displacement experiment is carried out on the experimental rock stratum 2 by using the displacement module, and the pressure parameter of the fluid in a guide pipe connected with the guide disc 5 by the injection pump 81 in the displacement experiment process, the fluid pressure parameter of the output end of the guide disc 5 at the tail end of the experimental rock stratum 2, the confining pressure parameter in the experimental box 1 and the data in the flowmeter 16 are recorded, and the steady-state permeability of the experimental rock stratum 2 is obtained by analyzing the data.
When the proppant fracture diversion test experiment is carried out on the experimental rock stratum 2, the pressure and the temperature inside the experimental box 1 are controlled by the pressure stabilizing module 14 and the temperature control module 15, the fracturing fluid in the fracturing fluid box 9 is used for carrying out an oil layer fracturing experiment, the propping agent is filled into the oil layer fracture by the propping agent diversion pump 10, the pressure difference of the fracturing fluid is collected by the pressure sensing module 92 and the pressure sensor inside the experimental box 1, the flow rate of the fracturing fluid is collected by the flow meter 16, the temperature inside the experimental box 1 is recorded by the temperature sensor inside the experimental box 1, the closing pressure inside the experimental box 1 is compensated according to the pressure sensor inside the experimental box 1 and the pressure stabilizing module 14, the data parameters of the fracturing experiment carried out on the fracturing fluid with different flow rates are tested through adjustment of the experiment, and the propping agent diversion capability of the experimental rock stratum 2 when the stratum condition is simulated is obtained by the data parameters.
When the fracturing experiment is carried out, the pipeline friction resistance parameters of the fracturing fluid can be tested by utilizing the pressure sensing modules 92 at the two ends of the conveying pipe 91 so as to obtain the resistance reduction rate of the pipeline to the fracturing fluid.
By manually rotating or rotating the rotating wheel 18 by using the driving motor 19, the rotating wheel 18 drives the eccentric disc 181 to rotate together, the eccentric disc 181 drives the guide post 124 to move together through the pushing block 182, when the guide post 124 is matched with the conical end 121 at one end of the guide post, the top block 1211 in the conical end 121 contacts with the one-way valve 1242 inside the conveying port 1241 at the corresponding end of the guide post 124, the one-way valve 1242 is opened, the cavity inside the guide post 124 is communicated with the through hole inside the top block 1211 at the moment, the input port 1243 is communicated with the corresponding inlet pipe 125 or the return pipe 126, the inlet pipe 125 or the return pipe 126 communicated with the input port 1243 is communicated with the output pipe 122, and the other group of pipes is communicated with the opening at the other end of the reversing module 12.
When the reverse control guide post 124 moves, the inlet pipe 125 and the return pipe 126 are reversely connected with two ends of the reversing module 12, so that the vacuum module, the back pressure module, the displacement module and the fracturing experiment module can be changed through the reversing module 12 along the experimental direction of the experimental rock stratum 2, and the bidirectional experiment of the experimental rock stratum 2 can be realized.
Because the natural electric field exists in the rock stratum in the oil reservoir, and the strong electric field is generated in the liquid-rock contact surface, the oil, gas and water and the seepage process in the pore medium, the oil displacement process can be adjusted and controlled by using the external electric field, the oil extraction is improved, and the crude oil recovery is improved. Through power 4, wire 31 and electrode plate 3, can apply the direct current electric field and act on experimental formation 2, through changing amperage and voltage, can test the recovery ratio of experimental formation 2 under different amperages and voltages.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. An oil recovery experimental system, comprising:
The experimental device comprises an experimental box (1), wherein experimental rock layers (2) for experiments are placed in the experimental box (1), guide plates (5) are arranged on two sides of the experimental box (1), and the guide plates (5) are communicated with the rock layers of the experimental rock layers (2);
The vacuum module is used for carrying out vacuum treatment in the experimental box (1) and is communicated with the guide plates (5) at two sides of the experimental rock layer (2) through a guide pipe;
The back pressure module is used for steady state back pressure of the tail end of the experimental rock stratum (2), and is communicated with a guide disc (5) of the tail end of the experimental rock stratum (2) through a guide pipe;
the displacement module is used for a displacement experiment of the experimental rock stratum (2) and is communicated with a guide disc (5) at the head end of the experimental rock stratum (2) through a guide pipe;
the fracturing experiment module is used for fracturing experiments of the experimental rock stratum (2), and is communicated with a guide disc (5) at the head end of the experimental rock stratum (2) through a guide pipe;
the vacuum module, the back pressure module, the displacement module and the fracturing experiment module are connected with the guide disc (5), and a reversing module (12) for controlling the flow direction of fluid in the guide tube is arranged in the guide tube;
the vacuum module comprises a vacuum pump (6) and a filter (61), wherein the filter (61) is arranged in a backflow conduit connected with the vacuum pump (6) and the guide disc (5);
the back pressure module comprises a back pressure pump (7), a buffer container (71) and a back pressure valve (72), wherein the buffer container (71) and the back pressure valve (72) are arranged in a conduit connected with the back pressure pump (7) and the guide disc (5);
The displacement module comprises an experiment liquid tank (8), a liquid injection pump (81) and a plurality of piston containers (82), wherein the plurality of piston containers (82) are arranged in parallel in a guide pipe connected with the liquid injection pump (81) and the guide plate (5), and a pressure sensor is arranged at the output end of the liquid injection pump (81);
The fracturing experiment module comprises:
the device comprises a fracturing fluid tank (9), wherein a plurality of groups of conveying pipes (91) with different specifications and types are arranged at the output end of the fracturing fluid tank (9), the conveying pipes (91) are connected with a guide pipe through reversing modules (12), and pressure sensing modules (92) are arranged at the two ends of the conveying pipes (91);
The two ends of the propping agent diversion pump (10) are respectively connected with the diversion discs (5) at two sides of the experimental stratum (2);
Further comprises:
The device comprises a waste liquid tank (17), wherein a pipeline is arranged between the waste liquid tank (17) and a conduit connected with a fracturing liquid tank (9) and a guide disc (5) at the tail end of an experimental rock layer (2), a pipeline is arranged between the waste liquid tank and a conduit connected with a proppant guide pump (10) and the guide disc (5) at the tail end of the experimental rock layer (2), and electromagnetic valves (13) are arranged in the pipelines;
both ends inside the reversing module (12) are respectively provided with a conical end (121), the tip end of the conical end (121) is provided with a top block (1211), the inside of the top block (1211) is provided with a through hole, the through hole is communicated to the outside of one end of the reversing module (12) through an output pipe (122), the top blocks (1211) in the two groups of conical ends (121) are communicated through a connecting pipe (123), and one end, far away from the connecting pipe (123), of the reversing module (12) is provided with an opening;
a guide post (124) is axially and slidably arranged in the reversing module (12), the guide post (124) is positioned between two groups of conical ends (121), conical grooves are formed in two ends of the guide post (124), the conical grooves correspond to the conical ends (121), a conveying port (1241) is formed in the conical grooves, a one-way valve (1242) is arranged in the conveying port (1241), and the conveying port (1241) corresponds to the top block (1211);
An input port (1243) is formed in the surface of the guide post (124), a cavity is formed in the guide post (124), the input port (1243) is communicated with the cavity, an inlet pipe (125) and a return pipe (126) are arranged on the surface of the reversing module (12), and the inlet pipe (125) and the return pipe (126) can be matched with the input port (1243).
2. The oil recovery experiment system according to claim 1, wherein a surface of the reversing module (12) is provided with a control mechanism for driving the guide post (124) to move, the control mechanism comprising:
The rotating wheel (18) is rotatably arranged on the surface of the reversing module (12), an eccentric disc (181) coaxially connected with the rotating wheel (18) is arranged in the reversing module (12), and a driving motor (19) for driving the rotating wheel (18) to rotate is arranged on the surface of the reversing module (12);
and the pushing block (182) is positioned on the surface of the guide post (124), and the pushing block (182) is positioned on the side surface of the eccentric disc (181).
3. The oil recovery ratio experiment system according to claim 2, wherein electrode plates (3) are arranged between two sides of the experimental rock layer (2) and the guide plate (5), through holes are formed in the surfaces of the electrode plates (3), guide wires (31) are arranged on the surfaces of the electrode plates (3), the guide wires (31) are connected with a power supply (4), and an insulating interlayer (11) is arranged on the inner side wall of the experimental box (1).
4. The oil recovery experiment system of claim 2, further comprising:
The pressure stabilizing module (14), the pressure stabilizing module (14) comprises a confining pressure pump and a confining pressure pipe, the confining pressure pump is communicated with the inside of the experiment box (1) through the confining pressure pipe, and a pressure sensor is arranged in the experiment box (1);
The temperature control module (15) is arranged in the temperature control module (15), the temperature controller is connected with the inside of the experiment box (1), and a temperature sensor is arranged in the experiment box (1);
and the flowmeter (16) is arranged in the guide pipe on the surface of the guide disc (5).
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