CN105735965B - Coal bed gas well pit shaft internal drainage gas production visual Simulation experimental provision and analogy method - Google Patents
Coal bed gas well pit shaft internal drainage gas production visual Simulation experimental provision and analogy method Download PDFInfo
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- CN105735965B CN105735965B CN201610213283.7A CN201610213283A CN105735965B CN 105735965 B CN105735965 B CN 105735965B CN 201610213283 A CN201610213283 A CN 201610213283A CN 105735965 B CN105735965 B CN 105735965B
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- 239000003245 coal Substances 0.000 title claims abstract description 57
- 238000004088 simulation Methods 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 230000000007 visual effect Effects 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000007788 liquid Substances 0.000 claims abstract description 38
- 238000002347 injection Methods 0.000 claims abstract description 24
- 239000007924 injection Substances 0.000 claims abstract description 24
- 239000011521 glass Substances 0.000 claims abstract description 22
- 238000003860 storage Methods 0.000 claims abstract description 15
- 239000007789 gas Substances 0.000 claims description 96
- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- 235000004443 Ricinus communis Nutrition 0.000 claims description 15
- 239000012530 fluid Substances 0.000 claims description 14
- 239000007791 liquid phase Substances 0.000 claims description 11
- 238000002474 experimental method Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000002817 coal dust Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 2
- 240000007594 Oryza sativa Species 0.000 claims 1
- 235000007164 Oryza sativa Nutrition 0.000 claims 1
- 235000009566 rice Nutrition 0.000 claims 1
- 239000012071 phase Substances 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000005065 mining Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 201000004569 Blindness Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000012800 visualization 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
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
-
- 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
- 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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- Engineering & Computer Science (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a kind of coal bed gas well pit shaft internal drainage gas production visual Simulation experimental provisions, including pit shaft simulator and movable support, the both ends of pit shaft simulator to be respectively equipped with the top connection with vent valve, lower contact；Top connection is connect with the first check valve, liquid-filling valve, liquid injection flowmeter, water pump successively；Lower contact is connect with flow measuring apparatus, eduction valve successively；Lower contact is connect with the second check valve, total gas injection valve, gas-liquid separator, large-capacity valve, vortex-shedding meter, pressure gauge, pressure regulator valve, gas storage pot valve, air accumulator, air compressor successively, gas-liquid separator is equipped with spinner flowmeter, small flow valve by parallel pipeline and pressure gauge secondary connection successively on parallel pipeline；Pit shaft simulator includes transparent pressure-resistant glass tube and multi-section type central tube.The present invention also provides a kind of coal bed gas well pit shaft internal drainage gas production visual simulation methods.The experimental provision and method can simulate multiphase flow flow condition in the arbitrary hole deviation steady tilted section pit shaft of coal bed gas well.
Description
Technical field
The present invention relates to a kind of simulators, and in particular to a kind of coal bed gas well pit shaft internal drainage gas production visual Simulation is real
Experiment device and analogy method.
Background technology
Coal bed gas is the grand strategy supplement of conventional gas, alleviates emission reduction to country as a kind of clean environment firendly energy
Pressure, Optimization of Energy Structure realize that economic transition has important strategic importance.Its main acquisition modes is mining with surface drill well,
Pump drainage is carried out using artificial wellbore to the underground water in coal seam and its country rock to promote to inhale in coal seam to reduce coal seam reservoirs pressure
Attached methane desorbing gas release, and be collected via oil jacket annular carrying to well head.Due to coal seam reservoirs stress sensitive, so
It in gatherer process, needs to understand the variation for grasping coal seam reservoirs at any time, to adjust mining intensity in time, keeps the exploitation of coal bed gas real
Now maximize.Coal seam reservoirs variation most directly affects be exactly coal bed gas well downhole well fluid flow behavior and flow pattern.It is i.e. accurate
It determines the flow condition in pit shaft, to formulate rational mining system, avoids blindness extraction, realize that production capacity is maximized with important
Meaning.
In recent years, with the development of coal bed gas industry, there is some simulated experiments dress for the mining of coal bed gas well
It sets, such as the coal dust output experimental provision in vertical bore, the visual experimental apparatus of simulation wellbore hole annulus multi phase flow, water pumping gas production
Experimental provision etc..But the function of these analogue experiment installations is more single, not will visualization, high pressure resistant and to temperature,
Pressure, hole deviation, tolerance, the comprehensive regulation of liquid measure and device realize unified combination, nothing to the adaptability of coal dust solid microparticulate
The flow behavior of method accurate simulation coal bed gas well downhole well fluid.
Invention content
The purpose of the present invention is to provide a kind of coal bed gas well pit shaft internal drainage gas production visual Simulation experimental provision and moulds
Quasi- method, the experimental provision and method can simulate the multiphase flow flow condition in the arbitrary hole deviation steady tilted section pit shaft of coal bed gas well.
The technical solution adopted in the present invention is：A kind of coal bed gas well pit shaft internal drainage gas production visual Simulation experiment dress
It sets, including pit shaft simulator, the movable support that is connect with pit shaft simulator, the upper end of the pit shaft simulator is equipped with band
The lower end of the top connection of vent valve, pit shaft simulator is equipped with lower contact；Top connection successively with the first check valve, liquid-filling valve, liquid
Body injects flowmeter, water pump connection, and liquid in water tank is pumped into pit shaft simulator by water pump；Lower contact successively with fluid flow
Meter, eduction valve connection, pit shaft simulator is by eduction valve toward water tank drain；
The lower contact successively with the second check valve, total gas injection valve, gas-liquid separator, large-capacity valve, vortex-shedding meter, pressure
Power table, pressure regulator valve, gas storage pot valve, air accumulator, air compressor connection；The gas-liquid separator passes through parallel pipeline and pressure gauge
Secondary connection, spinner flowmeter, small flow valve are equipped on parallel pipeline successively, and the gas-liquid separator is connected to blowdown valve；
The pit shaft simulator includes transparent pressure-resistant glass tube, and multi-section type center is equipped in the transparent pressure-resistant glass tube
Pipe, the multi-section type central tube is connected through a screw thread by several section short tubes and formed, multi-section type central tube by top connection with it is transparent
Pressure-resistant glass tube connection is fixed on the center of transparent pressure-resistant glass tube by centralizer；The length and appearance of multi-section type central tube
Characteristic size can all be realized by replacing and rejecting short tube；
The movable support includes rack body, and the lower end of the rack body is equipped with brake castor, the rack body
Upper end and one end of steel wire rope connect, the other end of steel wire rope passes through fixed pulley；
Temperature sensor, pressure sensor, constant temperature heating device are respectively equipped in the top connection and lower contact, temperature passes
Sensor, pressure sensor, air compressor, constant temperature heating device, vortex-shedding meter, water pump and control terminal connect；Control is eventually
End can regulate and control water pump and air compressor, acquire the temperature sensor and pressure sensor data of top connection and lower contact, with
And the fluid flow data of vortex-shedding meter metering.
Further scheme is that the drain side of the water pump is connect with flow divider, using the shunting of flow divider, regulates and controls water
The drain side output quantity of pump.
Further scheme is that the top connection, lower contact are used with pit shaft simulator and be threadedly coupled.
Further scheme is that the lower contact is built-in with bubble cutter device.
Further scheme is that the bubble cutter device includes plectane, and the plectane is equipped with several holes.
Further scheme is that the transparent pressure-resistant glass pipe outer wall posts twice and refers to scale, and twice refer to scale
Minimum scale be respectively millimeter with centimetre.
Further scheme is that transparent pressure resistance glass tube can bear the pressure not higher than 1.5Mpa, highest bearing temperature
It is 55 DEG C.
It is carried out using above-mentioned coal bed gas well pit shaft internal drainage gas production visual Simulation experimental provision the present invention also provides a kind of
The method of coal bed gas well pit shaft internal drainage gas production visual Simulation, includes the following steps：
1) coal bed gas well pit shaft internal drainage gas production visual Simulation experimental provision, is assembled；
2), movable support initial level is placed；Rack body upper end steel wire rope is above carried, rack body lower end system is opened simultaneously
The banking pin of dynamic castor；It is carried on steel wire rope, coordinates brake castor, pit shaft simulator is adjusted to a certain determining angle, then
Fixed steel wire rope, brake castor are inserted into banking pin, keep angle of inclination to stablize constant；
3), with reference to scale on the inside of water tank, quantitative clear water is added；Or according to coal bed gas well field working conditions, choose appropriate particle size
Coal dust is added in water tank, mixes the solidliquid mixture of determining volumetric concentration；
4) vent valve and liquid-filling valve, are opened, eduction valve, flow divider are closed, water pump is opened toward shaft drum form by control terminal
Liquid measure is injected in quasi- device, is then turned off water pump；
5) gas line flow, atm number, is selected to select vortex-shedding meter and large-capacity valve branch, small tolerance select spinner flowmeter and
Small flow valve branch；Total gas injection valve, large-capacity valve, small flow valve are closed, the output port pressure of pressure regulator valve is adjusted to minimum, pass
Close gas storage pot valve；Air compressor is controlled by control terminal, the gas injection in air accumulator reaches setup pressure value in air accumulator
Afterwards, air compressor is automatically stopped active standby；When gas storage pressure inside the tank is less than 1Mpa, air compressor is opened automatically again
It opens；
6) small flow valve or large-capacity valve, are opened according to the selection of gas flow size；Open gas storage pot valve and total gas injection
Valve keeps vent valve minimum aperture；Regulate and control pressure regulator valve output port pressure, utilizes pressure regulator valve output port and pit shaft simulator
Interior pressure difference conveys gas；
7) pressure in pit shaft simulator, is observed, deflation valve opening and pressure regulator valve output port pressure are regulated and controled, realizes pit shaft
Gas flow increases under the premise of pressure is constant in simulator；Control terminal opens top connection and the built-in constant temperature of lower contact fills
It sets, changes analog temperature in pit shaft simulator；
8) aerial drainage valve opening, is adjusted, liquid phase stream outflow is observed using fluid flowmeter, while opening water pump, opens simultaneously
Eduction valve is adjusted, keeps liquid injection flowmeter consistent with the show value of fluid flowmeter；
9) gas, liquid, solid multiphase flow flow condition in pit shaft simulator, is observed；Change temperature, pressure, liquid measure, tolerance,
One or several parameters in hole deviation, coal bed gas well borehole size feature, observation multiphase flow flow condition variation.
The beneficial effects of the present invention are：
Can simulate it is a variety of under the conditions of multiphase flow flow condition in arbitrary hole deviation steady tilted section pit shaft, and can directly observe fluid
The characteristics of motion is widely used, adaptable；
Water pump, liquid-filling valve, liquid injection flowmeter, the first check valve, flow measuring apparatus, eduction valve, water tank form liquid phase
Circuit regulates and controls the liquid phase circulation of whole device, for simulating the liquid phase circulation in coal bed gas well pit shaft；
Second check valve, total gas injection valve, gas-liquid separator, large-capacity valve, small flow valve, vortex-shedding meter, spinner
Meter, pressure regulator valve, gas storage pot valve, air accumulator, air compressor are used to simulate the gas phase flowing in coal bed gas well pit shaft；
Pressure regulator valve controls output gas phase air pressure together with air accumulator, and pressure gauge is for checking pressure regulation valve outlet pressure；It deflates
The gas phase of valve, pressure regulator valve, air accumulator, air compressor, total gas injection valve, large-capacity valve, small flow valve for regulation device flows；
In such a way that vortex-shedding meter, spinner flowmeter separate metered flow, to realize that large range high precision measures；
Realize that the angle of inclination of pit shaft simulator is adjusted using steel wire rope, fixed pulley, brake castor；
Movable support upper end is carried or transferred on steel wire rope, coordinates brake castor to adjust, fix coal bed gas well pit shaft angle,
0~90 ° of adjustable angle range realizes the inclination of coal bed gas well pit shaft；
The flowing of multiphase flow in simulation coal bed gas well pit shaft can be directly observed using transparent pressure-resistant glass tube；
It is connected through a screw thread by several section short tubes and forms multi-section type central tube, length can all pass through with external appearance characteristic size
It replaces and rejects short tube to realize, installation adjusts simplicity；Different pipe string (different-diameter, differences in transparent pressure-resistant glass tube can be achieved
The short tube of material concatenates) structure feature simulation；
Several section clear central pipes are connected through a screw thread, and convenient for installing and replacing, may make up the pit shaft of different size characteristics
Interior space also allows for the simulation of the arbitrary well depth position of coal bed gas well；
Top connection connect with multi-section type central tube, transparent pressure-resistant glass tube respectively by screw thread, lower contact by screw thread and
Transparent pressure resistance glass tube connection, multi-section type central tube lower end is hanging, installs very simple and convenient；
This method can simulate the multiphase flow flow condition in the arbitrary hole deviation steady tilted section pit shaft of coal bed gas well, be theoretical research with
The important verification of engineering practice and guidance；
Flowing simulated experiment of the gas and water two-phase in pit shaft simulator not only may be implemented in the present invention, can also realize coal
The Multiphase Flow simulated experiment of powder, gas and water in pit shaft simulator；The adjusting for coordinating temperature, pressure, can also be achieved coal bed gas
The fluid-flow analogy in well shaft internal drainage gas production each stage；
The present invention is easy to operate, feature-rich, it is only necessary to switch, adjust interface, control valve aperture changes fluid flowing and follows
Circulation journey and flow meet different experiments demand；
The present invention is by temperature sensor, pressure sensor, constant temperature heating device, air compressor, vortex-shedding meter, water pump
It is connect with control terminal, not only simplifies operation, also achieve the real-time measurement and acquisition of data.
Description of the drawings
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing：
Fig. 1 is the structural schematic diagram of the present invention；
Fig. 2 is the structural schematic diagram of bubble cutter device.
Wherein：1, rack body, 2, brake castor, 3, fixed pulley, 4, steel wire rope, 5, vent valve, 6, top connection, 7, transparent
Pressure-resistant glass tube, 8, multi-section type central tube, 9, lower contact, the 10, first check valve, 11, liquid-filling valve, 12, flow divider, 13, water pump,
14, water tank, 15, eduction valve, 16, fluid flowmeter, 17, liquid phase pipeline, the 18, second check valve, 19, total gas injection valve, 20, gas-liquid
Separator, 21, large-capacity valve, 22, small flow valve, 23, vortex-shedding meter, 24, spinner flowmeter, 25, pressure gauge, 26, pressure regulation
Valve, 27, air accumulator, 28, vapor delivery line, 29, air compressor, 30, control terminal, 31, blowdown valve, 32, data cable, 33,
Centralizer, 34, gas storage pot valve, 35, liquid inject flowmeter.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
Referring to Fig. 1, Fig. 2, a kind of coal bed gas well pit shaft internal drainage gas production visual Simulation experimental provision, including pit shaft simulation
The upper end of device, the movable support being connect with pit shaft simulator, pit shaft simulator is equipped with the top connection 6 with vent valve 5, well
The lower end of cylinder simulator is equipped with lower contact 9；Top connection 6 by liquid phase pipeline 17 successively with the first check valve 10, liquid-filling valve 11,
Liquid injects flowmeter 35, water pump 13 connects, and liquid in water tank 14 is pumped into pit shaft simulator by water pump 13；The drain of water pump 13
End is connect with flow divider 12, using the shunting of flow divider 12, regulates and controls the drain side output quantity of water pump 13；Lower contact 9 successively with stream
Flowmeter body 16, eduction valve 15 connect, and the liquid of pit shaft simulator is returned and flow back in water tank 14 by eduction valve 15；First check valve
10, liquid-filling valve 11, water pump 13, eduction valve 15, water tank 14 form liquid-phase loop, regulate and control the liquid phase circulation of whole device, are used for mould
Liquid phase flowing in quasi- coal bed gas well pit shaft；
Lower contact 9 by vapor delivery line 28 successively with the second check valve 18, total gas injection valve 19, gas-liquid separator 20, big stream
Valve 21, vortex-shedding meter 23, pressure gauge 25, pressure regulator valve 26, gas storage pot valve 34, air accumulator 27, air compressor 29 is measured to connect；Gas
Liquid/gas separator 20 is connect for 25 2 times by parallel pipeline with pressure gauge, is equipped with spinner flowmeter 24, small stream on parallel pipeline successively
Valve 22 is measured, gas-liquid separator 20 is connected to blowdown valve 31；Second check valve 18, total gas injection valve 19, gas-liquid separator 20, large-capacity valve
21, small flow valve 22, vortex-shedding meter 23,24 pressure regulator valve 26 of spinner flowmeter, gas storage pot valve 34, air accumulator 27, air compression
Machine 29 is used to simulate the gas phase flowing in coal bed gas well pit shaft；Air compressor 29, pressure regulator valve 26 and air accumulator 27 control together
Gas phase air pressure is exported, pressure gauge 25 is for checking 26 outlet pressure of pressure regulator valve；Vent valve 5, pressure regulator valve 26, air accumulator 27, air
Compressor 29, total gas injection valve 19, large-capacity valve 21,22 combinatorial regulation device gas phase of small flow valve cycle；To realize that wide range is high
Precision is measured, and metered flow mode is separated using vortex-shedding meter 23, spinner flowmeter 24；
Pit shaft simulator includes transparent pressure-resistant glass tube 7, and be equipped with several sections in transparent pressure resistance glass tube 7 is connected by screw thread
The multi-section type central tube 8 connect, arbitrary section can be removed or replace；Multi-section type central tube 8 is fixed on transparent by centralizer 33
The center of pressure-resistant glass tube 7；
Movable support includes rack body 1, and the lower end of rack body 1 is equipped with brake castor 2, the upper end of rack body 1 with
One end of steel wire rope 4 connects, and the other end of steel wire rope 4 passes through fixed pulley 3；Steel wire rope 4 above carries or transfers 1 upper end of rack body,
Coordinate brake castor 2 with adjusting, fixed angle, ranging from 0~90 ° of adjustable angle, the inclination for simulating coal bed gas well pit shaft；
Temperature sensor, pressure sensor, constant temperature heating device are respectively equipped in top connection 6 and lower contact 9, temperature passes
Sensor, pressure sensor, constant temperature heating device, air compressor 29, vortex-shedding meter 23, water pump 13 by data cable 32 with
Control terminal 30 connects；Control terminal 30 can regulate and control water pump 13 and air compressor 29, acquire in top connection 6 and lower contact 9
Temperature sensor and the fluid flow data measured of pressure sensor data and vortex-shedding meter 23.
In order to facilitate dismounting and installing, top connection 6, lower contact 9 are used with pit shaft simulator and are threadedly coupled.
It is built-in with bubble cutter device in lower contact 9, bubble cutter device includes plectane, and the plectane is equipped with several
The hole for having set metering hole is distributed on plectane by hole as needed.Twice are posted with reference to mark in transparent pressure-resistant 7 outer wall of glass tube
Ruler, twice with reference to scale minimum scale be respectively millimeter with centimetre.
In the present invention, transparent pressure resistance glass tube 7 can bear the pressure not higher than 1.5Mpa, and highest bearing temperature is 55 DEG C.
The present invention can simulate it is a variety of under the conditions of in arbitrary hole deviation steady tilted section pit shaft multiphase flow flow condition.
It is carried out using above-mentioned coal bed gas well pit shaft internal drainage gas production visual Simulation experimental provision the present invention also provides a kind of
The method of coal bed gas well pit shaft internal drainage gas production visual Simulation, includes the following steps：
1), according to coal bed gas well borehole size feature, assembling coal bed gas well pit shaft internal drainage gas production visual Simulation experiment
Device；
2), movable support initial level is placed；Then 1 upper end steel wire rope 4 of rack body is above carried, rack body is opened simultaneously
The banking pin of 1 lower end brake castor 2；Steel wire rope 4 above carries, and coordinates brake castor 2, pit shaft simulator is adjusted to a certain determination
Angle, fixed steel wire rope 4, brake castor 2 are inserted into banking pin, keep angle of inclination to stablize constant；
3), with reference to 14 inside scale of water tank, quantitative clear water is added；Or according to coal bed gas well field working conditions, choose suitable grain
Diameter coal dust is added in water tank 14, mixes the solidliquid mixture of determining volumetric concentration；Clear water can be used and carry out simulated experiment,
The solidliquid mixture with coal dust can be used and carry out simulated experiment；
4) vent valve 5 and liquid-filling valve 11, are opened, eduction valve 15, flow divider 12 are closed, water pump is opened by control terminal 30
13 inject in pit shaft simulator and have set liquid measure, are then turned off water pump 13；
5), select gas line flow, atm number that vortex-shedding meter 23 and 21 branch of large-capacity valve, small tolerance is selected to select spinner
Meter 24 and 22 branch of small flow valve；Total gas injection valve 19, large-capacity valve 21, small flow valve 22 are closed, by the output end of pressure regulator valve 26
Mouth pressure is adjusted to minimum, closing gas storage pot valve 34；Air compressor 29 is controlled by control terminal 30, the note in air accumulator 27
Gas, after reaching setup pressure value in air accumulator 27, air compressor 29 is automatically stopped active standby；When pressure is low in air accumulator 27
When 1Mpa, air compressor 29 automatically turns on again；
6) small flow valve 22 or large-capacity valve 21, are opened according to the selection of gas flow size；Open 34 He of gas storage pot valve
Total gas injection valve 19 keeps the minimum aperture of vent valve 5；Regulate and control 26 output port pressure of pressure regulator valve, using in pit shaft simulator
Pressure difference convey gas；
7) pressure in pit shaft simulator, is observed, deflation valve opening and pressure regulator valve output port pressure are regulated and controled, realizes pit shaft
Gas flow increases under the premise of pressure is constant in simulator；Control terminal opens top connection and the built-in constant temperature of lower contact fills
It sets, changes analog temperature in pit shaft simulator；
8) aerial drainage valve opening, is adjusted, liquid phase stream outflow is observed using fluid flowmeter, while opening water pump, opens simultaneously
Eduction valve is adjusted, keeps liquid injection flowmeter consistent with the show value of fluid flowmeter；
9) gas, liquid, solid multiphase flow flow condition in pit shaft simulator, is observed；Change temperature, pressure, liquid measure, tolerance,
One or several parameters in hole deviation, coal bed gas well borehole size feature, observation multiphase flow flow condition variation.
This method can realize the simulation of gas, liquid, solid multiphase flow flow condition in the arbitrary hole deviation steady tilted section pit shaft of coal bed gas well；
It can be used for the analog study of oil, natural gas, shale gas extraction process.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (7)
1. a kind of coal bed gas well pit shaft internal drainage gas production visual Simulation experimental provision, including pit shaft simulator, and and well
The movable support of cylinder simulator connection, it is characterised in that：The upper end of the pit shaft simulator is equipped with being connect on vent valve
The lower end of head, pit shaft simulator is equipped with lower contact；Top connection successively with the first check valve, liquid-filling valve, liquid injection flowmeter,
Water pump connects, and the liquid in water tank is pumped into pit shaft simulator by water pump；Lower contact is connect with eduction valve, and in the connecting pipe
Equipped with flow measuring apparatus, pit shaft simulator is by eduction valve toward water tank drain；
The lower contact successively with the second check valve, total gas injection valve, gas-liquid separator, large-capacity valve, vortex-shedding meter, pressure
Table, pressure regulator valve, gas storage pot valve, air accumulator, air compressor connection；Gas-liquid separator passes through parallel pipeline and the secondary company of pressure gauge
It connects, is equipped with spinner flowmeter, small flow valve on parallel pipeline successively；The gas-liquid separator is connected to blowdown valve；
The pit shaft simulator includes transparent pressure-resistant glass tube, and multi-section type central tube is equipped in the transparent pressure-resistant glass tube,
The multi-section type central tube is connected through a screw thread by several section short tubes and is formed；Multi-section type central tube passes through top connection and transparent pressure resistance
Glass tube connects, and the center of transparent pressure-resistant glass tube is fixed on by centralizer；
The movable support includes rack body, and the lower end of the rack body is equipped with brake castor, the rack body it is upper
End is connect with one end of steel wire rope, and the other end of steel wire rope passes through fixed pulley；
Temperature sensor, pressure sensor, constant temperature heating device, temperature sensing are respectively equipped in the top connection and lower contact
Device, pressure sensor, air compressor, constant temperature heating device, vortex-shedding meter, water pump and control terminal connect.
2. according to the coal bed gas well pit shaft internal drainage gas production visual Simulation experimental provision described in claim 1, feature exists
In：It is equipped with flow divider in the drain side of water pump.
3. according to the coal bed gas well pit shaft internal drainage gas production visual Simulation experimental provision described in claim 1, feature exists
In：The top connection, lower contact are used with pit shaft simulator and are threadedly coupled.
4. the coal bed gas well pit shaft internal drainage gas production visual Simulation experimental provision according to claim 1 or 3, special
Sign is：The lower contact is built-in with bubble cutter device.
5. according to the coal bed gas well pit shaft internal drainage gas production visual Simulation experimental provision described in claim 4, feature exists
In：The bubble cutter device includes plectane, and the plectane is equipped with several holes.
6. according to the coal bed gas well pit shaft internal drainage gas production visual Simulation experimental provision described in claim 1, feature exists
In：The transparent pressure-resistant glass pipe outer wall posts twice and refers to scale, twice with reference to scale minimum scale be respectively millimeter and li
Rice.
7. any coal bed gas well pit shaft internal drainage gas production visual Simulation is real in a kind of 1-6 using the claims
The method that experiment device carries out coal bed gas well pit shaft internal drainage gas production visual Simulation, it is characterised in that include the following steps：
1）, assembling coal bed gas well pit shaft internal drainage gas production visual Simulation experimental provision；
2）, movable support initial level place；Rack body upper end steel wire rope is above carried, rack body lower end brake shoe is opened simultaneously
The banking pin of wheel；It is carried on steel wire rope, coordinates brake castor, pit shaft simulator is adjusted to determining angle, then fix steel wire
Rope, brake castor are inserted into banking pin, keep angle of inclination to stablize constant；
3）, with reference to scale on the inside of water tank, quantitative clear water is added；Or according to coal bed gas well field working conditions, appropriate particle size coal dust is chosen,
It is added in water tank, mixes the solidliquid mixture of determining volumetric concentration；
4）, open vent valve and liquid-filling valve, close eduction valve, flow divider, water pump is opened by control terminal simulated toward pit shaft and fill
It sets interior injection and has set liquid measure, be then turned off water pump；
5）, selection gas line flow, atm number selects vortex-shedding meter and large-capacity valve branch, small tolerance to select spinner flowmeter and small stream
Measure valve branch；Total gas injection valve, large-capacity valve, small flow valve are closed, the output port pressure of pressure regulator valve is adjusted to minimum, closing storage
Gas tank valve；Air compressor is controlled by control terminal, the gas injection toward air accumulator in, after reaching setup pressure value in air accumulator, sky
Air compressor is automatically stopped active standby；When gas storage pressure inside the tank is less than 1Mpa, air compressor automatically turns on again；
6）, small flow valve or large-capacity valve opened according to the selection of gas flow size；Gas storage pot valve and total gas injection valve are opened, is protected
Hold vent valve minimum aperture；Regulate and control pressure regulator valve output port pressure, using in pressure regulator valve output port and pit shaft simulator
Pressure difference conveys gas；
7）, pressure in observation pit shaft simulator, regulate and control deflation valve opening and pressure regulator valve output port pressure, realize pit shaft simulation
Gas flow increases under the premise of pressure is constant in device；Control terminal opens top connection and the built-in heated at constant temperature of lower contact fills
It sets, changes analog temperature in pit shaft simulator；
8）, adjust aerial drainage valve opening, observe liquid phase stream outflow using fluid flowmeter, while opening water pump, open and adjusting
Eduction valve keeps liquid injection flowmeter consistent with the show value of fluid flowmeter；
9）, observation pit shaft simulator in gas, liquid, solid multiphase flow flow condition；Change temperature, pressure, liquid measure, tolerance, hole deviation,
One or several parameters in coal bed gas well borehole size feature, observation multiphase flow flow condition variation.
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