CN110308259B - Multi-field coupling fracturing-displacement cooperative strengthening gas extraction test device - Google Patents
Multi-field coupling fracturing-displacement cooperative strengthening gas extraction test device Download PDFInfo
- Publication number
- CN110308259B CN110308259B CN201910589989.7A CN201910589989A CN110308259B CN 110308259 B CN110308259 B CN 110308259B CN 201910589989 A CN201910589989 A CN 201910589989A CN 110308259 B CN110308259 B CN 110308259B
- Authority
- CN
- China
- Prior art keywords
- box body
- gas
- multifunctional
- flowmeter
- fracturing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000605 extraction Methods 0.000 title claims abstract description 44
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 42
- 230000008878 coupling Effects 0.000 title claims abstract description 27
- 238000010168 coupling process Methods 0.000 title claims abstract description 27
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 27
- 238000005728 strengthening Methods 0.000 title abstract description 21
- 230000000007 visual effect Effects 0.000 claims abstract description 65
- 239000003245 coal Substances 0.000 claims abstract description 36
- 238000005086 pumping Methods 0.000 claims abstract description 20
- 239000012780 transparent material Substances 0.000 claims abstract description 4
- 238000005553 drilling Methods 0.000 claims description 39
- 239000002184 metal Substances 0.000 claims description 31
- 238000007789 sealing Methods 0.000 claims description 24
- 238000004088 simulation Methods 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 230000035699 permeability Effects 0.000 claims description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 229920000515 polycarbonate Polymers 0.000 claims description 3
- 239000004417 polycarbonate Substances 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims 3
- 238000009434 installation Methods 0.000 claims 2
- 238000012800 visualization Methods 0.000 abstract description 3
- 230000002265 prevention Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
-
- 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
- G01N33/22—Fuels; Explosives
- G01N33/225—Gaseous fuels, e.g. natural gas
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Engineering & Computer Science (AREA)
- Pathology (AREA)
- Immunology (AREA)
- General Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
A multi-field coupling fracturing-displacement cooperative strengthening gas extraction test device is suitable for simulating multi-field coupling fracturing-displacement cooperative strengthening gas extraction tests in laboratories. The device comprises a visual box body made of transparent materials, wherein a loading system, an air source system, a temperature control system, a camera system and a pressure-drive-pumping system are arranged on the visual box body, and the loading system, the air source system, the temperature control system, the camera system and the pressure-drive-pumping system are respectively connected with a data acquisition and control system. The box body coal seam seepage field, temperature field and surface fracture field visualization device is simple in structure and convenient to use, and lays a foundation for researching high-efficiency gas extraction of a low-permeability coal seam and prevention and control of coal and gas outburst.
Description
Technical Field
The invention relates to a gas extraction test device, in particular to a multi-field coupling fracturing-displacement cooperative strengthening gas extraction test device which is suitable for underground simulation of a coal mine in a laboratory.
Background
The coal bed gas storage condition of China generally has the characteristics of three low and one high (low saturation, low permeability, low reservoir pressure and high metamorphism degree), and the permeability of most mining areas coal beds in China is 10-4～10-3And mD is 3-4 orders of magnitude lower than that of the United states and the like, coal seam gas extraction under the conditions is a worldwide problem, and meanwhile, various enhanced gas extraction measures are also proposed and implemented successively, such as a hydraulic fracturing technology, a coal seam gas injection displacement technology and the like.
In order to carry out the physical simulation test of the enhanced gas extraction indoors, a series of test devices are developed successively. Aiming at some low permeability coal seams, the effect of a single gas yield increasing technology is relatively limited, and different yield increasing technologies may need to be used for synergism, however, the existing test device mainly focuses on a certain yield increasing technology, and the function is relatively single. Therefore, in order to investigate the advantages and disadvantages of the related test apparatus, the following needs are proposed: (1) the gas extraction process under three coupling conditions of a mining stress field, a seepage field and a temperature field can be simulated, and the method is closer to the real and complex geological conditions of a site; (2) the enhanced gas extraction process under the conditions of a single yield increasing technology and different yield increasing technologies can be developed; (3) the coal seam internal reservoir parameters in the extraction process, the coal seam surface fracture evolution process in the fracturing process and the extraction flow can be monitored in real time.
Disclosure of Invention
Aiming at the defects of the technical comparison, the fracturing-displacement cooperative strengthening gas extraction test device is simple in structure and good in using effect, and can simulate fracturing-displacement cooperative strengthening gas extraction test device under different true triaxial stress, gas pressure and coal bed temperature multi-field coupling conditions.
In order to achieve the technical purpose, the multi-field coupling fracturing-displacement cooperative strengthening gas extraction test device comprises a visual box body made of transparent materials, wherein a loading system, an air source system, a temperature control system, a camera system and a pressure-drive-pumping system are arranged on the visual box body, and the loading system, the air source system, the temperature control system, the camera system and the pressure-drive-pumping system are respectively connected with a data acquisition and control system;
the visual box body is of a cuboid structure and comprises a box body cavity and a box body cover plate arranged at the top, a sealing ring is arranged between the box body cavity and the box body cover plate and is fixed by using a sealing bolt, a plurality of mounting holes for mounting various sensors and multifunctional drilling mounting holes are uniformly formed in the rear side wall of the box body cavity, the mounted sensors comprise an air pressure sensor, a temperature sensor and a stress sensor, multifunctional drilling holes are formed in the multifunctional drilling mounting holes, a multifunctional metal plate with the size equal to that of the bottom of the visual box body is arranged at the bottom in the box body cavity, the multifunctional metal plate is made of foam metal with better air permeability, an air charging port communicated with the outer side of the box body cavity is arranged at the bottom of the multifunctional metal plate, and;
the loading system comprises a plurality of transparent loading plates which are arranged in a box cover plate at the top of a visual box body and in the left side wall and the front side wall of a box body cavity, a loading piston is arranged on each transparent loading plate, and the loading pistons penetrate through the wall of the box body and are communicated with a pressurizing oil cylinder;
the gas source system comprises a high-pressure methane gas cylinder and a carbon dioxide gas cylinder, the gas pressure is not lower than 6MPa, the high-pressure gas cylinder is connected with an inflation inlet on a multifunctional metal plate in the visual box body through a vacuum pump by using a gas pipe, and a flowmeter is arranged on the gas pipe;
the temperature control system comprises a thermal resistance wire arranged on the surface of the multifunctional metal plate, and the thermal resistance wire is connected with a temperature adjusting device through a wiring port arranged on the multifunctional metal plate and used for heating the coal sample arranged in the visual box body;
the camera system comprises a high-speed camera arranged on one side of the visual box body and is used for capturing crack development and evolution characteristics of the surface of the coal bed in the box body in real time;
the data acquisition and control system comprises a high-speed data acquisition board and a computer which are connected with each other, and is used for respectively acquiring or controlling the pressure and the temperature of gas inside the coal body of the visual box body, the crack form of the surface of the coal body and the flow of extracted gas;
the pressure-driving-pumping system comprises a multifunctional drilling hole arranged in a visual box body and a fracturing pump, a flowmeter, a plunger pump and a gas chromatograph which are connected with each other.
The material of visual box constitutes for the polycarbonate board, and box cavity size is 1.5 0.5 m.
Atmospheric pressure sensor utilizes sealed pad an to insert from the sensor mounting hole in the visual box outside, and the atmospheric pressure sensor tail end passes through data line and data acquisition and is connected with control system, and the sensor mounting hole inboard is equipped with a PU pipe that extends the setting in the inside of coal sample, and position through adjustment PU pipe open end is with the different position gas pressure of test, wherein is equipped with PU pneumatic joint between PU pipe and the visual box body wall.
The temperature sensor and the stress sensor are identical in mounting structure, data lines connected with the tail portions of the temperature sensor and the stress sensor are fixed in sensor mounting holes of the visual box body through the conversion joints and the sealing gaskets, and the data lines at the head portions of the temperature sensor and the stress sensor are buried in positions, needing to detect temperature or stress, of the coal sample.
Set up multi-functional drilling in multi-functional drilling mounting hole, multi-functional drilling afterbody is equipped with external joint on visual box, be equipped with sealed pad a between the box wall of external joint and visual box, be equipped with sealed pad b between the box wall inboard of visual box and the multi-functional drilling, the part that multi-functional drilling stretches into in the coal sample includes hole sealing section and fracturing section, multi-functional drilling total length 0.5m, hole sealing section length 0.15m, fracturing section length 0.35m, fracturing section pipe wall circumference and radial direction distribute has a plurality of ventilative apertures, ventilative aperture 2mm, interval 5mm arranges, the function that has fracturing, displacement, take out and adopt.
When the pressure-drive-pumping system is used for simulating pumping, the pressure-drive-pumping system comprises a high-pressure gas cylinder, a vacuum pump and a flowmeter I which are sequentially connected, wherein the output end of the flowmeter I is connected with an inflation inlet of a multifunctional metal plate through a pipeline, a multifunctional drilling hole in a visual box body is selected according to experimental needs, and the multifunctional drilling hole is connected with a flowmeter II through an external connector of the multifunctional drilling hole;
when the fracturing is simulated, the fracturing simulation device comprises a high-pressure gas cylinder, a vacuum pump and a flowmeter I which are sequentially connected, wherein the output end of the flowmeter I is connected with an inflation inlet of a multifunctional metal plate through a pipeline, a multifunctional drilling hole in a visual box body is selected according to experimental needs and is connected with a flowmeter II through an external connector of the multifunctional drilling hole, and a gas outlet pipeline of a flowmeter III is connected with a fracturing pump;
when the displacement gas is simulated, the outlet of a high-pressure gas cylinder is respectively connected with a vacuum pump and a plunger pump pipeline, the vacuum pump pipeline is connected with a flowmeter I, the outlet of the flowmeter I is connected with an inflation inlet of a multifunctional metal plate, the multifunctional drill holes closest to the inflation inlet on a visual box body are sequentially sequenced to define 6 drill holes to be A1-A6 respectively, the outlet pipeline of the plunger pump is connected with the multifunctional drill hole A1 through an external connector through a flowmeter IV, the multifunctional drill hole A1 is used as a gas injection displacement drill hole, the multifunctional drill hole A2 is connected with the gas inlet end of a flowmeter V through an external connector, the multifunctional drill hole A2 is used as a gas injection production drill hole, and the gas outlet end of the flowmeter V is connected with a gas chromatograph.
When the simulation fracturing-displacement cooperative enhanced extraction is carried out, a flowmeter III is further connected to the A2 multifunctional drill hole connected with the flowmeter V on the visual box body after the system connection during the simulation displacement of gas, and an outlet of the flowmeter III is connected with a fracturing pump through a pipeline.
Has the advantages that:
the method can simulate the fluid fracturing coal bed, fluid displacement gas, gas extraction process and the enhanced gas extraction process in different combination modes under different true triaxial stress, gas pressure and coal bed temperature multi-field coupling conditions indoors, can synchronously monitor and acquire the coal bed gas pressure, temperature, surface crack morphology and extracted gas flow, and provides an effective means for researching the gas extraction efficiency and optimizing the extraction measures under different enhanced extraction conditions.
Description of the drawings:
fig. 1 is a schematic structural diagram of the multi-field coupling fracturing-displacement cooperative strengthening gas extraction test device.
FIG. 2 is a schematic structural diagram of a transparent box of the multi-field coupling fracturing-displacement collaborative strengthening gas extraction test device.
FIG. 3 is a top view of a transparent box body of the multi-field coupling fracturing-displacement collaborative strengthening gas extraction test device.
FIG. 4 is a rear view of a transparent box body of the multi-field coupling fracturing-displacement collaborative strengthening gas extraction test device.
FIG. 5 is a schematic structural diagram of a loading system of the multi-field coupling fracturing-displacement cooperative strengthening gas extraction test device.
Fig. 6(a) is a schematic view of an air pressure sensor of the multi-field coupling fracturing-displacement cooperative strengthening gas extraction test device.
Fig. 6(b) is a schematic diagram of a temperature sensor or a stress sensor of the multi-field coupling fracturing-displacement cooperative strengthening gas extraction test device.
Fig. 6(c) is a schematic view of a multifunctional borehole of the multi-field coupling fracturing-displacement cooperative strengthening gas extraction test device.
Fig. 7 is a schematic diagram of a camera position of the multi-field coupling fracturing-displacement cooperative strengthening gas extraction test device.
Fig. 8(a) is a schematic connection diagram of an extraction test of the multi-field coupling fracturing-displacement cooperative strengthening gas extraction test device.
Fig. 8(b) is a schematic connection diagram of a fracturing test of the multi-field coupling fracturing-displacement cooperative strengthening gas extraction test device.
Fig. 8(c) is a schematic diagram of a displacement gas test connection of the multi-field coupling fracturing-displacement cooperative strengthening gas extraction test device.
Fig. 8(d) is a schematic connection diagram of a fracturing-displacement cooperative enhanced gas extraction test of the multi-field coupling fracturing-displacement cooperative enhanced gas extraction test device.
In the figure: 1-visual box body, 2-box body cover plate, 3-box body cavity body, 4-sealing ring, 5-sealing bolt, 6-multifunctional metal plate, 7-thermal resistance wire, 8-inflation inlet, 9-wiring inlet, 10-sensor mounting hole, 11-multifunctional drilling mounting hole, 12-loading plate, 13-loading piston, 14-high-speed camera, 15-sealing gasket a, 16-air pressure sensor, 17-PU pneumatic connector, 18-PU pipe, 19-sealing gasket b, 20-data line, 21-conversion connector, 22-temperature sensor, 23-stress sensor, 24-drilling external connector, 25-multifunctional drilling hole, 26-fracturing section, 27-sealing section and 28-ventilation small hole, 29-high pressure gas cylinder, 30-vacuum pump, 31-flowmeter I, 32-flowmeter II, 33-flowmeter III, 34-flowmeter IV, 35-flowmeter V, 36-fracturing pump, 37-plunger pump and 38-gas chromatograph.
Detailed Description
Embodiments of the invention are further described below with reference to the accompanying drawings:
as shown in fig. 1, the multi-field coupling fracturing-displacement cooperative strengthening gas extraction test device comprises a visual box body 1 made of transparent materials, wherein a loading system, an air source system, a temperature control system, a camera system and a pressure-drive-pumping system are arranged on the visual box body 1, and the loading system, the air source system, the temperature control system, the camera system and the pressure-drive-pumping system are respectively connected with a data acquisition and control system;
as shown in fig. 2, 3 and 4, the visual box 1 is a cuboid structure, the visual box 1 is made of polycarbonate plate, the size of the box cavity is 1.5 x 0.5m, the visual box 1 comprises a box cavity 3 and a box cover plate 2 arranged at the top, a sealing ring 4 is arranged between the box cavity 3 and the box cover plate 2 and is fixed by a sealing bolt 5, the rear side wall of the box cavity 3 is uniformly provided with a plurality of mounting holes 10 for mounting a plurality of types of sensors and mounting holes 11 for multifunctional drilling, the mounted sensors comprise an air pressure sensor 16, a temperature sensor 22 and a stress sensor 23, the multifunctional drilling mounting holes 11 are internally provided with multifunctional drilling holes 25, the bottom in the box cavity 3 is provided with a multifunctional metal plate 6 with the same size as the bottom of the visual box 1, the multifunctional metal plate 6 is made of foam metal with good air permeability, the bottom of the multifunctional metal plate 6 is provided with an inflation inlet 8 communicated with the outer side of the box body cavity, and the inflation inlet 8 is connected with an air source system through a pipeline;
as shown in fig. 5, the loading system comprises a plurality of transparent loading plates 12 arranged in a top box cover plate of the visual box 1, in a left side wall and in a front side wall of the box cavity 3, each transparent loading plate 12 is provided with a loading piston 13, and the loading pistons 13 penetrate through the wall of the box and are communicated with the pressurizing oil cylinder;
the gas source system comprises a high-pressure methane gas cylinder and a carbon dioxide gas cylinder, the high-pressure gas cylinder with the gas pressure not lower than 6MPa is connected with an inflation inlet 8 on the multifunctional metal plate 3 in the visual box body 1 through a vacuum pump by using a gas pipeline, and a flowmeter is arranged on the gas pipeline;
the temperature control system comprises a thermal resistance wire 7 arranged on the surface of the multifunctional metal plate 6, and the thermal resistance wire 7 is in line connection with the temperature adjusting device through a wiring port 9 arranged on the multifunctional metal plate 6 and is used for heating the coal sample arranged in the visual box body 1;
as shown in fig. 7, the camera system comprises a high-speed camera 14 arranged on one side of the visualization box body 1, and is used for capturing the surface crack development and evolution characteristics of the coal bed inside the box body in real time;
the data acquisition and control system comprises a high-speed data acquisition board and a computer which are connected with each other, and is used for respectively acquiring or controlling the gas pressure and temperature in the coal body of the visual box body 1, the crack form on the surface of the coal body and the flow of extracted gas;
the pressure-drive-pumping system comprises a multifunctional drilling hole 25 arranged in the visual box body 1 and a fracturing pump, a flowmeter, a plunger pump and a gas chromatograph which are connected with each other.
As shown in fig. 6(a), the air pressure sensor 16 is inserted from the sensor mounting hole 10 outside the visual box 1 by using a sealing gasket a15, the tail end of the air pressure sensor 16 is connected with a data acquisition and control system by a data line 20, a PU pipe 18 extending inside the coal sample is arranged inside the sensor mounting hole 10, the gas pressure at different positions is tested by adjusting the position of the open end of the PU pipe 18, and a PU pneumatic joint 17 is arranged between the PU pipe 18 and the box wall of the visual box 1.
As shown in fig. 6(b), the temperature sensor 22 and the stress sensor 23 have the same mounting structure, the data line 20 connected to the tail portions of the temperature sensor 22 and the stress sensor 23 is fixed in the sensor mounting hole 10 of the visual box 1 through the adapter 21 and the gasket a15, and the data line 20 at the head portions of the temperature sensor 22 and the stress sensor 23 is buried in the coal sample at a position where temperature or stress needs to be detected.
As shown in fig. 6(c), a multifunctional borehole 25 is arranged in the multifunctional borehole mounting hole 11, an external joint 24 is arranged at the tail of the multifunctional borehole 25 on the visual box 1, a sealing gasket a15 is arranged between the external joint 24 and the box wall of the visual box 1, a sealing gasket b19 is arranged between the inner side of the box wall of the visual box 1 and the multifunctional borehole 25, a part of the multifunctional borehole 25 extending into the coal sample comprises a borehole sealing section 27 and a fracturing section 26, the total length of the multifunctional borehole 25 is 0.5m, the length of the borehole sealing section 27 is 0.15m, the length of the fracturing section 26 is 0.35m, a plurality of small ventilation holes 28 are distributed in the circumferential direction and the radial direction of the wall of the fracturing section 26, the small ventilation holes 28 have a diameter of 2mm, and the interval of 5mm, and have functions of fracturing.
As shown in fig. 8(a), when the pressure-drive-pumping system is used for simulating pumping, the pressure-drive-pumping system comprises a high-pressure gas cylinder 29, a vacuum pump 30 and a flowmeter i 31 which are sequentially connected, wherein the output end of the flowmeter i 31 is connected with the gas charging port 8 of the multifunctional metal plate 6 through a pipeline, a multifunctional drill hole 25 on the visual box body 1 is selected according to experimental needs, and is connected with a flowmeter ii 32 through an external connector 24 of the multifunctional drill hole 25;
as shown in fig. 8(b), when fracturing is simulated, the fracturing simulation device comprises a high-pressure gas cylinder 29, a vacuum pump 30 and a flowmeter i 31 which are connected in sequence, wherein the output end of the flowmeter i 31 is connected with the inflation inlet 8 of the multifunctional metal plate 6 through a pipeline, a multifunctional drilling hole 25 on the visual box body 1 is selected according to experimental needs and is connected with a flowmeter ii 32 through an external connector 24 of the multifunctional drilling hole 25, and a gas outlet pipeline of a flowmeter iii 33 is connected with a fracturing pump 36;
as shown in fig. 8(c), when the displacement gas is simulated, the outlet of the high-pressure gas cylinder 29 is respectively connected with the vacuum pump 30 and the plunger pump 37 through pipelines, the vacuum pump 30 is connected with the flow meter i 31 through a pipeline, the outlet of the flow meter i 31 is connected with the inflation inlet 8 of the multifunctional metal plate 6, the multifunctional drill holes 25 closest to the inflation inlet 8 on the visual box 1 are sequentially sequenced to define that 6 drill holes are respectively a1-a6, the outlet pipeline of the plunger pump 37 is connected with the multifunctional drill hole 25 a1 through the flow meter iv 34, the multifunctional drill hole 25 a1 is used as a gas injection displacement drill hole, the multifunctional drill hole 25 a2 is connected with the gas inlet end of the flow meter v 35 through the external connector 24, the multifunctional drill hole 25 a2 is used as a gas injection production drill hole, and the gas outlet end of the flow meter v 35 is connected with the gas chromatograph.
As shown in fig. 8(d), when the fracturing-displacement cooperative enhanced extraction is simulated, after the system is connected when the gas is simulated, a flowmeter iii 33 is further connected to the multifunctional drill hole a2 connected to the flowmeter v 35 on the visualization box 1 through a pipeline, and the outlet of the flowmeter iii 33 is connected to the fracturing pump 36 through a pipeline.
Claims (4)
1. The utility model provides a many field coupling fracturing-displacement are in coordination with reinforceing gas drainage test device which characterized in that: the device comprises a visual box body (1) made of transparent materials, wherein a loading system, an air source system, a temperature control system, a camera system and a pressure-drive-pumping system are arranged on the visual box body (1), and the loading system, the air source system, the temperature control system, the camera system and the pressure-drive-pumping system are respectively connected with a data acquisition and control system;
the visual box body (1) is of a cuboid structure, the visual box body (1) comprises a box body cavity (3) and a box body cover plate (2) arranged at the top, a sealing ring (4) is arranged between the box body cavity (3) and the box body cover plate (2) and is fixed by a sealing bolt (5), the rear side wall of the box body cavity (3) is uniformly provided with a plurality of mounting holes (10) for mounting various sensors and a plurality of mounting holes (11) for drilling holes, the mounted sensors comprise an air pressure sensor (16), a temperature sensor (22) and a stress sensor (23), a plurality of multifunctional drilling holes (25) are arranged in the mounting holes (11), the bottom in the box body cavity (3) is provided with a multifunctional metal plate (6) which is as large as the bottom of the visual box body (1), the multifunctional metal plate (6) is made of foam metal with better air permeability, the bottom of the multifunctional metal plate (6) is provided with an air charging, the inflation inlet (8) is connected with an air source system through a pipeline;
the loading system comprises a plurality of transparent loading plates (12) which are arranged in a top box cover plate of the visual box body (1), the left side wall and the front side wall of the box body cavity (3), each transparent loading plate (12) is provided with a loading piston (13), and the loading pistons (13) penetrate through the wall of the box body and are communicated with a pressurizing oil cylinder;
the gas source system comprises a high-pressure methane gas cylinder and a carbon dioxide gas cylinder, the gas pressure is not lower than 6MPa, the high-pressure gas cylinder is connected with an inflation inlet (8) on a multifunctional metal plate (6) in the visual box body (1) through a vacuum pump by utilizing a gas pipeline, and a flowmeter is arranged on the gas pipeline;
the temperature control system comprises a thermal resistance wire (7) arranged on the surface of the multifunctional metal plate (6), and the thermal resistance wire (7) is in line connection with the temperature adjusting device through a wiring port (9) arranged on the multifunctional metal plate (6) and is used for heating the coal sample arranged in the visual box body (1);
the camera system comprises a high-speed camera (14) arranged on one side of the visual box body (1) and is used for capturing the surface crack development and evolution characteristics of the coal bed in the box body in real time;
the data acquisition and control system comprises a high-speed data acquisition board and a computer which are connected with each other, and is used for respectively acquiring or controlling the gas pressure and temperature in the coal body, the crack form on the surface of the coal body and the flow of extracted gas in the visual box body (1);
the pressure-driving-pumping system comprises a multifunctional drilling hole (25) arranged in a visual box body (1), and a fracturing pump, a flowmeter, a plunger pump and a gas chromatograph which are connected with each other;
the multifunctional drilling hole is characterized in that a multifunctional drilling hole (25) is arranged in a multifunctional drilling hole mounting hole (11), an external connector (24) is arranged at the tail of the multifunctional drilling hole (25) on a visual box body (1), a sealing gasket a (15) is arranged between the external connector (24) and the box body wall of the visual box body (1), a sealing gasket b (19) is arranged between the inner side of the box body wall of the visual box body (1) and the multifunctional drilling hole (25), a part of the multifunctional drilling hole (25) extending into a coal sample comprises a hole sealing section (27) and a fracturing section (26), the whole length of the multifunctional drilling hole (25) is 0.5m, the hole sealing section (27) is 0.15m long, the fracturing section (26) is 0.35m long, a plurality of small air holes (28) are distributed in the circumferential direction and the radial direction of the fracturing section (26), the apertures of the small air holes (28) are 2mm, the tube wall;
when the pressure-driving-pumping system is used for simulating pumping, the pressure-driving-pumping system comprises a high-pressure gas cylinder (29), a vacuum pump (30) and a flowmeter I (31) which are sequentially connected, wherein the output end of the flowmeter I (31) is connected with an inflation inlet (8) of a multifunctional metal plate (6) through a pipeline, a multifunctional drilling hole (25) in a visual box body (1) is selected according to experimental needs, and the multifunctional drilling hole is connected with a flowmeter II (32) through an external connector (24) of the multifunctional drilling hole (25) through a pipeline;
when fracturing is simulated, the fracturing simulation device comprises a high-pressure gas cylinder (29), a vacuum pump (30) and a flowmeter I (31) which are sequentially connected, wherein the output end of the flowmeter I (31) is connected with a gas charging port (8) of a multifunctional metal plate (6) through a pipeline, a multifunctional drilling hole (25) in a visual box body (1) is selected according to experimental needs and is connected with a flowmeter II (32) through an external connector (24) of the multifunctional drilling hole (25) through a pipeline, and a gas outlet pipeline of a flowmeter III (33) is connected with a fracturing pump (36);
when the displacement gas is simulated, the outlet of a high-pressure gas bottle (29) is respectively connected with a vacuum pump (30) and a plunger pump (37) through pipelines, the vacuum pump (30) is connected with a flowmeter I (31) through a pipeline, the outlet of the flowmeter I (31) is connected with an inflation inlet (8) of a multifunctional metal plate (6), 6 drill holes on a visual box body (1) closest to the inflation inlet (8) are sequentially sequenced and defined as A1-A6 respectively, the outlet pipeline of the plunger pump (37) is connected with a multifunctional drill hole A1 through an external connector (24) through a flowmeter IV (34), the multifunctional drill hole A1 is used as a gas injection displacement drill hole, the multifunctional drill hole A2 is connected with the gas inlet end of a flowmeter V (35) through the external connector (24), the multifunctional drill hole A2 is used as a gas injection production drill hole, and the gas outlet end of the flowmeter V (35) is connected with a gas chromatograph (38);
when the simulation fracturing-displacement cooperative enhanced extraction is carried out, a flowmeter III (33) is further connected to the A2 multifunctional drill hole connected with the flowmeter V (35) on the visual box body (1) after the system connection during the simulation displacement gas, and an outlet of the flowmeter III (33) is connected with a fracturing pump (36) through a pipeline.
2. The multi-field coupling fracturing-displacement cooperative reinforcement gas extraction test device according to claim 1, characterized in that: the visual box body (1) is made of polycarbonate plates, and the size of a box body cavity (3) is 1.5 x 0.5 m.
3. The multi-field coupling fracturing-displacement cooperative reinforcement gas extraction test device according to claim 1, characterized in that: atmospheric pressure sensor (16) utilize sealed pad a (15) to insert from sensor mounting hole (10) in visual box (1) outside, atmospheric pressure sensor (16) tail end passes through data line (20) and data acquisition and control system is connected, sensor mounting hole (10) inboard is equipped with one and extends and set up PU pipe (18) inside the coal sample, position through adjustment PU pipe (18) open end is with the gas pressure of test different positions, wherein be equipped with PU pneumatic joint (17) between PU pipe (18) and visual box (1) box wall.
4. The multi-field coupling fracturing-displacement cooperative reinforcement gas extraction test device according to claim 1, characterized in that: the temperature sensor (22) and the stress sensor (23) are identical in installation structure, the data line (20) connected with the tail of the temperature sensor (22) and the tail of the stress sensor (23) is fixed in the sensor installation hole (10) of the visual box body (1) through the conversion joint (21) and the sealing gasket a (15), and the data line (20) at the head of the temperature sensor (22) and the head of the stress sensor (23) is buried in a position, needing to detect temperature or stress, in a coal sample.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910589989.7A CN110308259B (en) | 2019-07-02 | 2019-07-02 | Multi-field coupling fracturing-displacement cooperative strengthening gas extraction test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910589989.7A CN110308259B (en) | 2019-07-02 | 2019-07-02 | Multi-field coupling fracturing-displacement cooperative strengthening gas extraction test device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110308259A CN110308259A (en) | 2019-10-08 |
| CN110308259B true CN110308259B (en) | 2021-02-02 |
Family
ID=68078236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910589989.7A Active CN110308259B (en) | 2019-07-02 | 2019-07-02 | Multi-field coupling fracturing-displacement cooperative strengthening gas extraction test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110308259B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949800A (en) * | 2010-08-24 | 2011-01-19 | 清华大学 | Pressing-twisting multi-shaft loading testing machine |
| CN103089254A (en) * | 2013-01-23 | 2013-05-08 | 重庆大学 | Physical simulation test tube of multi-field coupling coalbed methane exploitation |
| CN103089295A (en) * | 2013-01-23 | 2013-05-08 | 重庆大学 | Coalbed methane gas drainage testing method during combined mining of multiple coalbeds |
| CN103114827A (en) * | 2013-01-23 | 2013-05-22 | 重庆大学 | Multi-field coupling coal bed methane extraction simulation testing method |
| CN102621229B (en) * | 2012-03-27 | 2013-12-18 | 重庆大学 | Large simulation test piece box for multi field coupling coal mine dynamic disaster |
| CN102621230B (en) * | 2012-03-27 | 2014-12-03 | 重庆大学 | Multi-field-coupled coal mine dynamic disaster large-scale simulation testing method |
| CN104596909A (en) * | 2015-01-30 | 2015-05-06 | 中国矿业大学 | Multidimensional-loading and unloading multiphase porous media strong-coupling damage and porous flow experimental system and method |
| CN105484720A (en) * | 2015-12-29 | 2016-04-13 | 中国矿业大学 | Microwave-assisted extraction and hydrofracture cooperative coal seam anti-reflection method |
| CN108414419A (en) * | 2018-01-31 | 2018-08-17 | 中国矿业大学 | A kind of test of three-axis penetration rate and CO2Displacement simulation experimental rig |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7264049B2 (en) * | 2004-05-14 | 2007-09-04 | Maguire James Q | In-situ method of coal gasification |
| CN103114870B (en) * | 2013-01-23 | 2015-04-29 | 重庆大学 | Multi-field coupling coal bed methane extraction physical simulation testing system |
| CN105443081B (en) * | 2016-01-08 | 2017-12-05 | 中国矿业大学(北京) | A kind of gas pumping equipment and pumping method based on thought of rotating |
| CN105510142B (en) * | 2016-01-15 | 2018-02-16 | 太原理工大学 | A kind of axle crushing test device of coal petrography multiphase different fluid three and test method |
| CN106770897B (en) * | 2016-11-17 | 2019-03-19 | 中国矿业大学 | A kind of gas drainage is coupled with coal spontaneous combustion causes calamity experimental simulation device and method |
| CN107290343B (en) * | 2017-06-26 | 2020-03-24 | 重庆大学 | Visual physical simulation test system for coal and gas outburst dynamic disaster |
| CN109386270B (en) * | 2018-11-21 | 2021-02-23 | 山东大学 | Coal rock stratum gas power permeability-increasing seepage and displacement simulation test system and test method |
-
2019
- 2019-07-02 CN CN201910589989.7A patent/CN110308259B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949800A (en) * | 2010-08-24 | 2011-01-19 | 清华大学 | Pressing-twisting multi-shaft loading testing machine |
| CN102621229B (en) * | 2012-03-27 | 2013-12-18 | 重庆大学 | Large simulation test piece box for multi field coupling coal mine dynamic disaster |
| CN102621230B (en) * | 2012-03-27 | 2014-12-03 | 重庆大学 | Multi-field-coupled coal mine dynamic disaster large-scale simulation testing method |
| CN103089254A (en) * | 2013-01-23 | 2013-05-08 | 重庆大学 | Physical simulation test tube of multi-field coupling coalbed methane exploitation |
| CN103089295A (en) * | 2013-01-23 | 2013-05-08 | 重庆大学 | Coalbed methane gas drainage testing method during combined mining of multiple coalbeds |
| CN103114827A (en) * | 2013-01-23 | 2013-05-22 | 重庆大学 | Multi-field coupling coal bed methane extraction simulation testing method |
| CN104596909A (en) * | 2015-01-30 | 2015-05-06 | 中国矿业大学 | Multidimensional-loading and unloading multiphase porous media strong-coupling damage and porous flow experimental system and method |
| CN105484720A (en) * | 2015-12-29 | 2016-04-13 | 中国矿业大学 | Microwave-assisted extraction and hydrofracture cooperative coal seam anti-reflection method |
| CN108414419A (en) * | 2018-01-31 | 2018-08-17 | 中国矿业大学 | A kind of test of three-axis penetration rate and CO2Displacement simulation experimental rig |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110308259A (en) | 2019-10-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112414915B (en) | Test system and method for simulating tunnel excavation seepage change under complex geological conditions | |
| CN108333098B (en) | Shale gas reservoir microcrack high-temperature high-pressure visual gas-water two-phase seepage experimental device | |
| CN110306964B (en) | Hydraulic fracturing coal seam crack visualization and permeability increasing effect evaluation method | |
| CN110308258B (en) | Multi-field coupling visual coal and gas delay outburst test device | |
| CN110284922B (en) | CO (carbon monoxide)2Method for testing outburst induced by geological sequestration enhanced gas extraction | |
| CN202204661U (en) | Device for simulating pipeline water inrush grouting treatment model, and testing system with device | |
| CN104297128A (en) | Triaxial stress seepage experiment device under high pressure water and subpressure loading condition | |
| CN105507894B (en) | Coal bed gas vertical well hydraulic fracturing process coal dust output test device and method | |
| CN107024420A (en) | A kind of axle servo seepage apparatus of coal seam containing gas dynamic disturbances fluid structurecoupling three | |
| CN107288632B (en) | Coal-rock reservoir drainage and production water source and pressure drop path simulation device and method | |
| CN209745496U (en) | reservoir hydropower station leakage comprehensive detection device | |
| CN110308052B (en) | Hollow rock sample radial seepage test device and test method based on acoustic emission technology | |
| CN207647494U (en) | A kind of twin packer layering water plug | |
| CN210269442U (en) | Triaxial coal petrography multi-field multiphase coupling fracturing experimental apparatus | |
| CN108468532A (en) | A kind of petroleum pipeline sand control dredging in-pipe robot system and its method thin clearly | |
| CN110530771B (en) | Pressure chamber for coal rock sample gas seepage test | |
| CN201843592U (en) | Oil-gas well perforation ground dynamic simulation tester | |
| CN104373106A (en) | Experimental method and experimental system of gas sealing performance of underground packer | |
| CN209012798U (en) | Shale gas pipe detection mechanism | |
| CN110308246B (en) | Outburst elimination technology for water injection of outburst coal seam and outburst elimination effect test method | |
| CN110308261B (en) | Coal bed heating and CO injection2Collaborative reinforcement gas extraction simulation test method | |
| CN114061649B (en) | Automatic quick on-line monitoring equipment for underground water quality and water level synchronization | |
| CN110308259B (en) | Multi-field coupling fracturing-displacement cooperative strengthening gas extraction test device | |
| CN106567998A (en) | Gas pipeline leakage detection simulation experiment platform based on optical fiber temperature sensor | |
| CN110082220A (en) | A kind of porous guiding fracturing experiments device of true triaxial |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |