CN105735966A - Coal-bed gas well shaft drainage gas recovery coal dust migration simulation device and simulation method - Google Patents
Coal-bed gas well shaft drainage gas recovery coal dust migration simulation device and simulation method Download PDFInfo
- Publication number
- CN105735966A CN105735966A CN201610214261.2A CN201610214261A CN105735966A CN 105735966 A CN105735966 A CN 105735966A CN 201610214261 A CN201610214261 A CN 201610214261A CN 105735966 A CN105735966 A CN 105735966A
- Authority
- CN
- China
- Prior art keywords
- valve
- gas
- pit shaft
- liquid separator
- liquid
- 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.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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 DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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 DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
Abstract
The invention discloses a coal-bed gas well shaft drainage gas recovery coal dust migration simulation device comprises a shaft simulation device and a moveable bracket, wherein an upper connector and a lower connector are respectively arranged at two ends of the shaft simulation device; the upper connector is connected with a second one-way valve, a liquid injection valve, a liquid injection flowmeter and a water pump in sequence; the upper connector is connected with a liquid discharge valve, a gas-liquid separator, a liquid flowmeter and a draining valve in sequence; the lower connector is connected with a first one-way valve, a main gas injection valve, a large flow valve, a vortex shedding flowmeter, a pressure gauge, a pressure adjusting valve , a gas storage tank valve, a gas storage tank and an air compressor in sequence; the pressure gauge is in secondary connection with the main gas injection valve through a parallelly connecting pipeline; a flowmeter and a small flow valve are sequentially arranged on the parallel connected pipeline; the moveable bracket comprises a bracket body, a brake foot wheel, a steel wire rope and a fixed pulley. The invention further provides a coal-bed gas well shaft drainage gas recovery coal dust migration simulation method. By adopting the device and the method, the migration and settling rules of solid-phase micro particles of coal dust in a shaft can be simulated and studied.
Description
Technical field
The present invention relates to a kind of analog, be specifically related to a kind of coal bed gas well pit shaft internal drainage gas production coal dust transported simulation device and analogy method.
Background technology
Coal bed gas, as a kind of clean environment firendly energy, is that the grand strategy of conventional gas is supplemented, and country is alleviated emission reduction, Optimization of Energy Structure, realizes economic transition and have important strategic importance.It mainly obtains mode is mining with surface drill well, utilizes artificial well that the subsoil water in coal seam and country rock thereof is carried out pump drainage, thus reducing coal seam reservoirs pressure, promoting the methane desorbing gas release of absorption in coal seam, and being collected to well head via oil jacket annular carrying.The existence of coal dust solid microparticulate is the big feature that coal bed gas well mining produces, in mining production process, coal dust, in wellbore bottom, is very easily assembled agglomerating away from Pump Suction Nozzle one end, and then form deposit buildup or coal bridge, cause that well blocking is smooth, holddown, bury the problems such as pump.Therefore the flow behavior grasping coal bed gas well downhole well fluid and flow pattern are understood at any time, specify migration and the aggregate and precipitate rule of coal dust, selection and mining for production scheme stop well operations risk assessment etc. and provide favourable guidance and basis for estimation, for formulating rational mining system, avoid blindly extraction, it is achieved production capacity maximizes significant.
In recent years, with the development of coal bed gas industry, the mining for coal bed gas well had had some analogue experiment installations, 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 comparatively single, not by visualization, high pressure resistant with the adaptability of coal dust solid microparticulate is realized unified combination by temperature, pressure, hole deviation, tolerance, the comprehensive regulation of liquid measure and device, cannot the flow behavior of coal dust solid microparticulate in accurate simulation coal bed gas well pit shaft, and then the true migration reflecting coal dust and aggregate and precipitate rule.
Summary of the invention
It is an object of the invention to provide a kind of coal bed gas well pit shaft internal drainage gas production coal dust transported simulation device and analogy method, these apparatus and method can the migration in the wellbore of simulation study coal dust solid microparticulate, settlement law.
The technical solution adopted in the present invention is:
A kind of coal bed gas well pit shaft internal drainage gas production coal dust transported simulation device, including the travel(l)ing rest that pit shaft analog is connected with pit shaft analog, the upper end of described pit shaft analog is provided with top connection, and the lower end of pit shaft analog is provided with lower contact；
Described lower contact injects effusion meter with the second check valve, liquid-filling valve, liquid successively, water pump is connected, and the liquid phase upstream end of water pump connects with water tank, and water pump is by the liquid suction pit shaft analog in water tank；
Described top connection is connected with tapping valve, gas-liquid separator, fluid flowmeter, eduction valve successively, and the water in pit shaft analog is discharged by eduction valve；Described top connection is connected with gas-liquid separator by vent valve, and gas-liquid separator is connected to relief valve；
Described lower contact is connected with the first check valve, total gas injection valve, large-capacity valve, vortex-shedding meter, Pressure gauge, pressure regulator valve, gas storage pot valve, air accumulator, air compressor successively, described Pressure gauge pipeline in parallel is connected with total gas injection valve secondary, and parallel pipeline is sequentially provided with spinner flowmeter, low discharge valve；
Described pit shaft analog includes transparent pressure glass tubing, is provided with multi-section type central canal in described transparent pressure glass tubing, and described multi-section type central canal is threaded connection by some joint short tubes and forms；Multi-section type central canal is connected with transparent pressure glass tubing by top connection, is fixed on the center of transparent pressure glass tubing by centralizer；
Described travel(l)ing rest includes rack body, and the lower end of described rack body is provided with brake castor, and the upper end of described rack body is connected with one end of steel wire rope, the other end traverse fixed pulley of steel wire rope；
Described top connection and lower contact are respectively equipped with temperature sensor, pressure transducer, constant temperature heating device, temperature sensor, pressure transducer, constant temperature heating device, air compressor, vortex-shedding meter, water pump are connected with control terminal, control terminal and can control water pump, air compressor, constant temperature heating device, gather temperature sensor and the pressure sensor data of top connection and lower contact and the fluid flow data of vortex-shedding meter metering.
Further scheme is, the interface that connects of vent valve and gas-liquid separator is positioned at the top of gas-liquid separator；The interface that connects of relief valve and gas-liquid separator is positioned at the top of gas-liquid separator；The interface that connects of tapping valve and gas-liquid separator is positioned at the middle and lower part, side of gas-liquid separator；Be provided with the short tube of internal and external threads in the bottom of gas-liquid separator, short tube stretches in gas-liquid separator, and exceeds 4-6cm bottom gas-liquid separator；Described short tube is connected with fluid flowmeter.This structure can guarantee that gas-liquid separation effect；By pipeline precession gas-liquid separator 4-6cm, it is possible to prevent the clogging deposits pipeline piled up bottom gas-liquid separator, affect flowing and the circulation of liquid phase.
Further scheme is, vent valve is threadeded with gas-liquid separator employing with the connection interface of gas-liquid separator with the connection interface of gas-liquid separator, tapping valve with the connection interface of gas-liquid separator, relief valve；Fluid flowmeter adopts with short tube threadeds.Adopt threaded being easily installed and dismounting, also allow for cleaning.
Further scheme is, the interface latus rectum of gas-liquid separator and tapping valve is more than the interface latus rectum of short tube Yu fluid flowmeter；The maximum opening of tapping valve is more than the maximum opening of eduction valve.If the internal diameter of tapping valve is little, then there is liquid phase and flow into less than outflow, cause seal failure, be unfavorable for the separation of gas-liquid.
Further scheme is, the liquid outlet of water pump is connected with flow divider, utilizes the shunting of flow divider, the liquid-phase outlet end output of regulation and control water pump.
Further scheme is, described lower contact is made up of lower contact pipe nipple and seal base, and seal base and lower contact pipe nipple are threaded connection, it is simple to cleaning precipitate.
Further scheme is, the placement location entirety of gas-liquid separator, higher than the top of pit shaft analog, can make gas-liquid separator effectively play gas-liquid separation effect, facilitates experimental implementation and metering liquid phase flow.
Further scheme is, described top connection, lower contact adopt with pit shaft analog threadeds.Transparent pressure glass tubing can bear the pressure not higher than 1.5Mpa, and design simulation pressure is less than 0.8MPa, and the highest bearing temperature is 55 DEG C.
The present invention also provides for a kind of method adopting above-mentioned coal bed gas well pit shaft internal drainage gas production coal dust transported simulation device to carry out coal bed gas well pit shaft internal drainage gas production coal dust transported simulation, comprises the steps:
1), according to shape space annular space size characteristic in coal bed gas well pit shaft, coal bed gas well pit shaft internal drainage gas production coal dust transported simulation device is assembled；
2), rack body initial level is placed；Lift up the steel wire rope of rack body upper end, open the banking pin of rack body lower end brake castor simultaneously；Steel wire rope lifts up, and coordinates brake castor, regulates pit shaft analog to determining angle, then fixes steel wire rope, and brake castor inserts banking pin, keeps angle of inclination to stablize constant；
3), with reference to scale inside water tank, quantitative clear water is added；Or according to coal bed gas well field working conditions, choose appropriate particle size coal dust, add in water tank, mix the solidliquid mixture determining volumetric concentration, keep being sufficiently stirred for；
4), open vent valve, liquid-filling valve, relief valve, tapping valve, open water pump toward injection liquid in pit shaft analog by controlling terminal, have liquid phase to switch off the pump and relief valve after overflowing until relief valve；
5), selecting gas line flow process, atm number selects vortex-shedding meter and large-capacity valve branch road, and little tolerance selects spinner flowmeter and low discharge valve branch road；Close total gas injection valve, large-capacity valve, low discharge valve, gas storage pot valve, the output port pressure of pressure regulator valve is adjusted to minimum；Opening air compressor by controlling terminal, gas injection in air accumulator, after reaching setup pressure value in air accumulator, air compressor is automatically stopped active standby；When gas storage pressure inside the tank is lower than 1Mpa, air compressor automatically turns on again；
6), select to open low discharge valve or large-capacity valve according to setting simulation gas uninterrupted；Open gas storage pot valve and total gas injection valve, crack relief valve；Regulation and control pressure regulator valve output port pressure, utilizes and carries gas with the pressure differential in pit shaft analog, it is achieved discharge opeing, gas injection, supercharging；
7), progressively regulate and increase pressure regulator valve output port pressure, coordinate crack relief valve to set up pressure in pit shaft analog, force value in Synchronous pit shaft analog；Regulation and control relief valve aperture and pressure regulator valve output port pressure, it is achieved in pit shaft analog under the constant premise of pressure, gas flow increases；Control terminal and open the built-in thermostat of top connection and lower contact, it is achieved the simulation of temperature in pit shaft analog；
8), by controlling terminal unlatching water pump, open liquid-filling valve, standard-sized sheet flow divider, crack eduction valve, and slowly turn down flow divider aperture and increase eduction valve aperture, make liquid inject effusion meter consistent with the show value of fluid flowmeter, suitable with design liquid phase flow rate；
9) migration of coal dust and aggregate and precipitate rule in pit shaft analog, are observed；Change one or several parameter in temperature, pressure, liquid measure, tolerance, solid phase coal dust microparticle concentration, hole deviation, coal bed gas well borehole size feature, observe migration and aggregate and precipitate rule, the change of multiphase flow flow condition of coal dust.
Further scheme is, step 3) in the volumetric concentration of solidliquid mixture less than 35%, microparticle particle diameter is not more than 2mm.
The beneficial effects of the present invention is:
The flow behavior of coal dust solid microparticulate in any hole deviation steady tilted section pit shaft, migration and aggregate and precipitate rule can be simulated under multiple condition, and can directly observe multiphase flow fluid flow movement rule；
First check valve, total gas injection valve, large-capacity valve, low discharge valve, vortex-shedding meter, spinner flowmeter, pressure regulator valve, gas storage pot valve, air accumulator, air compressor are for simulating 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 used for checking pressure regulator valve outlet pressure；Vent valve, relief valve, pressure regulator valve, air accumulator, air compressor, total gas injection valve, large-capacity valve, low discharge valve flow for the gas phase of regulation device；
Vortex-shedding meter, spinner flowmeter is adopted to separate the mode of metered flow, to realize large range high precision metering；
Steel wire rope lifts up or transfers travel(l)ing rest upper end, coordinates brake castor to regulate, to fix coal bed gas well pit shaft angle, adjustable angle scope 0～90 °, it is achieved the inclination of coal bed gas well pit shaft；
Transparent pressure glass tubing is adopted can directly to observe the flowing of gas phase, liquid phase in simulation coal bed gas well pit shaft；
Be threaded connection the multi-section type central canal formed by some joint short tubes, its length and external appearance characteristic size all can be realized with rejecting short tube by replacing, installation, adjustment simplicity, it may be achieved different pipe string structure characteristic simulations in pit shaft；
Top connection is connected with multi-section type central canal, transparent pressure glass tubing respectively by screw thread, and lower contact is connected with transparent pressure glass tubing by screw thread, installs very simple and convenient；
The method can simulate the multiphase flow flow condition in any hole deviation steady tilted section pit shaft of coal bed gas well, is important checking and the guidance of theoretical research and engineering practice；
The present invention is possible not only to realize the biphase flowing simulated experiment in pit shaft analog of gas and water, it is possible to realize the multiphase flow simulation experiment in pit shaft analog of coal dust, gas and water；Coordinate the adjustment of temperature, pressure, also can realize the fluid-flow analogy in coal bed gas well pit shaft internal drainage each stage of gas production；
The present invention is easy and simple to handle, feature richness, it is only necessary to switching, adjustment interface, controls valve opening, changes fluid flow circuit flow process and flow, meet different experiments demand；
Temperature sensor, pressure transducer, constant temperature heating device, air compressor, vortex-shedding meter, water pump are connected by the present invention with control terminal, have both simplified operation, also achieve measuring in real time and gathering of data.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of gas-liquid separator；
Fig. 3 is pit shaft analog and gas-liquid separator locus schematic diagram；
nullWherein: 1、Rack body，2、Brake castor，3、Fixed pulley，4、Steel wire rope，5、Vent valve，6、Top connection，7、Transparent pressure glass tubing，8、Multi-section type central canal，9、Lower contact、10、Second 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，18、First check valve，19、Total gas injection valve，20、Gas-liquid separator，21、Large-capacity valve，22、Low discharge valve，23、Vortex-shedding meter，24、Spinner flowmeter，25、Pressure gauge，26、Pressure regulator valve，27、Air accumulator，28、Vapor delivery line，29、Air compressor，30、Control terminal，31、Tapping valve，32、Data cable，33、Centralizer，34、Gas storage pot valve，35、Liquid injects effusion meter，36、Relief valve.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
Referring to Fig. 1, Fig. 2, Fig. 3, a kind of coal bed gas well pit shaft internal drainage gas production coal dust transported simulation device, including the travel(l)ing rest that pit shaft analog is connected with pit shaft analog, the upper end of described pit shaft analog is provided with top connection 6, and the lower end of pit shaft analog is provided with lower contact 9；In order to easy disassembly with install, top connection 6, lower contact 9 and pit shaft analog adopt threadeds；
Pit shaft analog includes transparent pressure glass tubing 7, is provided with, in transparent pressure glass tubing 7, the multi-section type central canal 8 that some joints are threaded connection, and arbitrarily joint can disallowable or replacement for it；Multi-section type central canal 8 is fixed in transparent pressure glass tubing 7 by centralizer 33；
Travel(l)ing rest includes rack body 1, and the lower end of rack body 1 is provided with brake castor 2, and the upper end of rack body 1 is connected with one end of steel wire rope 4, the other end traverse fixed pulley 3 of steel wire rope 4；Steel wire rope 4 lifts up or transfers rack body 1 upper end, coordinates brake castor 2 with adjustment, fixed angle, and adjustable angle ranges for 0～90 °, for simulating the inclination of coal bed gas well pit shaft；
Lower contact 9 injects effusion meter 35 with the second check valve 10, liquid-filling valve 11, liquid successively by liquid phase pipeline 17, water pump 13 is connected, water pump 13 liquid-phase outlet end is connected with flow divider 12, utilize the shunting of flow divider 12, regulation and control water pump 13 liquid-phase outlet end output, water pump 13 is by the liquid suction pit shaft analog in water tank 14；Top connection 6 is connected with tapping valve 31, gas-liquid separator 20, fluid flowmeter 16, eduction valve 15 successively, and the liquid of pit shaft analog is discharged by eduction valve 15；Top connection 6 is connected with gas-liquid separator 20 by vent valve 5, and gas-liquid separator 20 is connected to relief valve 36；Second check valve 10, liquid-filling valve 11, water pump 13, flow divider 12, eduction valve 15, gas-liquid separator 20, tapping valve 31, regulate and control the liquid phase flowing of whole device, be used for simulating coal bed gas well pit shaft and include the migration of coal dust liquid phase；
Lower contact 9 is connected with the first check valve 18, total gas injection valve 19, large-capacity valve 21, vortex-shedding meter 23, Pressure gauge 25, pressure regulator valve 26, gas storage pot valve 34, air accumulator 27, air compressor 29 successively by vapor delivery line 28；Pressure gauge 25 pipeline in parallel is connected for 19 2 times with total gas injection valve, and parallel pipeline is sequentially provided with spinner flowmeter 24, low discharge valve 22；First check valve 18, total gas injection valve 19, large-capacity valve 21, low discharge valve 22, vortex-shedding meter 23, spinner flowmeter 24, pressure regulator valve 26, gas storage pot valve 34, air accumulator 27, air compressor 29 are for simulating the gas phase flowing in coal bed gas well pit shaft；Air compressor 29, pressure regulator valve 26 control output gas phase air pressure together with air accumulator 27, and Pressure gauge 25 is used for checking pressure regulator valve 26 outlet pressure；Vent valve 5, relief valve 36, pressure regulator valve 26, air accumulator 27, air compressor 29, total gas injection valve 19, large-capacity valve 21, low discharge valve 22 combinatorial regulation device gas phase flow；For realizing large range high precision metering, adopt vortex-shedding meter 23, spinner flowmeter 24 separately metered flow mode；
Top connection 6 and lower contact 9 are respectively equipped with temperature sensor, pressure transducer, constant temperature heating device, temperature sensor, pressure transducer, constant temperature heating device, air compressor 29, vortex-shedding meter 23, water pump 13 are connected with controlling terminal 30 by data cable 32, control terminal 30 and can control water pump 13, air compressor 29, constant temperature heating device, gather temperature sensor and the pressure sensor data of top connection 6 and lower contact 9 and the fluid flow data of vortex-shedding meter 23 metering.
In the present embodiment, the interface that connects of vent valve 5 and gas-liquid separator 20 is positioned at the top of gas-liquid separator 20；The interface that connects of relief valve 36 and gas-liquid separator 20 is positioned at the top of gas-liquid separator 20；The interface that connects of tapping valve 31 and gas-liquid separator 20 is positioned at the middle and lower part, side of gas-liquid separator 20；Be provided with the short tube of internal and external threads in the bottom of gas-liquid separator 20, short tube stretches in gas-liquid separator 20, and exceeds 5cm bottom gas-liquid separator 20, and this short tube is connected with fluid flowmeter 16.Vent valve 5 and gas-liquid separator 20 connect interface, relief valve 36 and the connection interface of gas-liquid separator 20, tapping valve 31 and gas-liquid separator 20 connection interface adopt with gas-liquid separator 20 and threaded；Fluid flowmeter 16 adopts with short tube threadeds, and has both been easily installed and dismounting, has also allowed for cleaning.
In the present invention, in order to reach good sealing effectiveness, it is achieved gas-liquid separation, the gas-liquid separator 20 interface internal diameter with tapping valve 31 can be adopted more than short tube and the interface internal diameter with fluid flowmeter 16；The maximum opening of tapping valve is more than the maximum opening of eduction valve.
In the present invention, being made up of lower contact pipe nipple and seal base in lower contact 9, seal base and lower contact pipe nipple are threaded connection.Transparent pressure glass tubing 7 can bear the pressure not higher than 1.5Mpa, and design simulation pressure is less than 0.8MPa, and the highest bearing temperature is 55 DEG C.
In the present invention, the placement location entirety of gas-liquid separator, higher than the top of pit shaft analog, can make gas-liquid separator effectively play gas-liquid separation effect, facilitates experimental implementation and metering liquid phase flow.
The present invention can simulate under multiple condition the flow condition of multiphase flow in any hole deviation steady tilted section pit shaft.
A kind of method adopting above-mentioned coal bed gas well pit shaft internal drainage gas production coal dust transported simulation device to carry out coal bed gas well pit shaft internal drainage gas production coal dust transported simulation, comprises the steps:
1), according to shape space annular space size characteristic in coal bed gas well pit shaft, coal bed gas well pit shaft internal drainage gas production coal dust transported simulation device is assembled；
2), rack body 1 initial level is placed；Lift up the steel wire rope 4 of rack body 1 upper end, open the banking pin of rack body 1 lower end brake castor 2 simultaneously；Steel wire rope 4 lifts up, and coordinates brake castor 2, regulates pit shaft analog to determining angle, then fixes steel wire rope 4, and brake castor 2 inserts banking pin, keeps angle of inclination to stablize constant；
3), with reference to scale inside water tank 14, quantitative clear water is added；Or according to coal bed gas well field working conditions, choose appropriate particle size coal dust, add in water tank 14, mix the solidliquid mixture determining volumetric concentration, keep being sufficiently stirred for；In the preferred embodiment, the volumetric concentration of solidliquid mixture is less than 35%, and microparticle particle diameter is not more than 2mm；
4), open vent valve 5, liquid-filling valve 11, relief valve 36, tapping valve 31, open water pump 13 toward injection liquid in pit shaft analog by controlling terminal 30, have liquid phase to switch off the pump 13 after overflowing until relief valve 36；
5), selecting gas line flow process, atm number selects vortex-shedding meter 23 and large-capacity valve 21 branch road, and little tolerance selects spinner flowmeter 24 and low discharge valve 22 branch road；Close total gas injection valve 19, large-capacity valve 21, low discharge valve 22, gas storage pot valve 34, the output port pressure of pressure regulator valve 26 is adjusted to minimum；Opening air compressor 29 by controlling terminal 30, gas injection in air accumulator 27, after reaching setup pressure value in air accumulator 27, air compressor 29 is automatically stopped active standby；When in air accumulator 27, pressure is lower than 1Mpa, air compressor 29 automatically turns on again；
6), select to open low discharge valve or large-capacity valve according to setting simulation gas uninterrupted；Open gas storage pot valve 34 and total gas injection valve 19, crack relief valve 36；Regulation and control pressure regulator valve 26 output port pressure, utilizes and carries gas with the pressure differential in pit shaft analog, it is achieved discharge opeing, gas injection, supercharging；
7), progressively regulate and increase pressure regulator valve 26 output port pressure, coordinate crack relief valve 36 to set up pressure in pit shaft analog, force value in Synchronous pit shaft analog；Regulation and control relief valve 36 aperture and pressure regulator valve 26 output port pressure, it is achieved in pit shaft analog under the constant premise of pressure, gas flow increases；Control terminal 30 and open the built-in thermostat of top connection 6 and lower contact 9, it is achieved the simulation of temperature in pit shaft analog；
8), open water pump 13 by control terminal 30, open liquid-filling valve 11, standard-sized sheet flow divider 12, crack eduction valve 15, and slowly turn down flow divider 12 aperture and increase eduction valve 15 aperture, make liquid inject effusion meter 35 consistent with the show value of fluid flowmeter 16, suitable with design liquid phase flow rate；
9) migration of coal dust and aggregate and precipitate rule in pit shaft analog, are observed；Change one or several parameter in temperature, pressure, liquid measure, tolerance, solid phase coal dust microparticle concentration, hole deviation, coal bed gas well borehole size feature, observe migration and aggregate and precipitate rule, the change of multiphase flow flow condition of coal dust.
This method can realize the simulation of gas, liquid, solid, multiphase flow flow condition in any hole deviation steady tilted section pit shaft of coal bed gas well；Changing temperature, pressure, tolerance, liquid measure, solid phase coal dust microparticle concentration by regulating, come migration and the aggregate and precipitate rule of studying coal powder, selection and mining for production scheme stop well operations risk assessment etc. and provide favourable guidance and basis for estimation.
It should be appreciated that for those of ordinary skills, it is possible to improved according to the above description or converted, and all these are improved and convert the protection domain that all should belong to claims of the present invention.
Claims (10)
1. a coal bed gas well pit shaft internal drainage gas production coal dust transported simulation device, including the travel(l)ing rest that pit shaft analog is connected with pit shaft analog, it is characterized in that: the upper end of described pit shaft analog is provided with top connection, and the lower end of pit shaft analog is provided with lower contact；
Described lower contact injects effusion meter with the second check valve, liquid-filling valve, liquid successively, water pump is connected, and water pump is by the liquid suction pit shaft analog in water tank；
Described top connection is connected with tapping valve, gas-liquid separator, fluid flowmeter, eduction valve successively, and the water in pit shaft analog is discharged by eduction valve；Described top connection is connected with gas-liquid separator by vent valve, and gas-liquid separator is connected to relief valve；
Described lower contact is connected with the first check valve, total gas injection valve, large-capacity valve, vortex-shedding meter, Pressure gauge, pressure regulator valve, gas storage pot valve, air accumulator, air compressor successively；Described Pressure gauge pipeline in parallel is connected with total gas injection valve secondary, and parallel pipeline is sequentially provided with spinner flowmeter, low discharge valve；
Described pit shaft analog includes transparent pressure glass tubing, it is provided with multi-section type central canal in described transparent pressure glass tubing, described multi-section type central canal is threaded connection by some joint short tubes and forms, multi-section type central canal is connected with transparent pressure glass tubing by top connection, is fixed on the center of transparent pressure glass tubing by centralizer；
Described travel(l)ing rest includes rack body, and the lower end of described rack body is provided with brake castor, and the upper end of described rack body is connected with one end of steel wire rope, the other end traverse fixed pulley of steel wire rope；
Being respectively equipped with temperature sensor, pressure transducer, constant temperature heating device in described top connection and lower contact, temperature sensor, pressure transducer, constant temperature heating device, air compressor, vortex-shedding meter, water pump are connected with control terminal.
2. coal bed gas well pit shaft internal drainage gas production coal dust transported simulation device according to claim 1, it is characterised in that: the interface that connects of vent valve and gas-liquid separator is positioned at the top of gas-liquid separator；The interface that connects of relief valve and gas-liquid separator is positioned at the top of gas-liquid separator；The interface that connects of tapping valve and gas-liquid separator is positioned at the middle and lower part, side of gas-liquid separator；Be provided with the short tube of internal and external threads in the bottom of gas-liquid separator, short tube stretches in gas-liquid separator, and exceeds 4-6cm bottom gas-liquid separator；Described short tube is connected with fluid flowmeter.
3. coal bed gas well pit shaft internal drainage gas production coal dust transported simulation device according to claim 2, it is characterised in that: vent valve is threadeded with gas-liquid separator employing with the connection interface of gas-liquid separator with the connection interface of gas-liquid separator, tapping valve with the connection interface of gas-liquid separator, relief valve；Fluid flowmeter adopts with short tube threadeds.
4. coal bed gas well pit shaft internal drainage gas production coal dust transported simulation device according to claim 1, it is characterised in that: the interface latus rectum of gas-liquid separator and tapping valve is more than the interface latus rectum with fluid flowmeter；The maximum opening of tapping valve is more than the maximum opening of eduction valve.
5. coal bed gas well pit shaft internal drainage gas production coal dust transported simulation device according to claim 1, it is characterised in that: the liquid outlet of water pump is connected with flow divider.
6. coal bed gas well pit shaft internal drainage gas production coal dust transported simulation device according to claim 1, it is characterised in that: described top connection, lower contact adopt with pit shaft analog threadeds.
7. coal bed gas well pit shaft internal drainage gas production coal dust transported simulation device according to claim 6, it is characterised in that: described lower contact is made up of lower contact pipe nipple and seal base, and seal base and lower contact pipe nipple are threaded connection.
8. coal bed gas well pit shaft internal drainage gas production coal dust transported simulation device according to claim 1, it is characterised in that: the placement location entirety of gas-liquid separator is higher than the top of pit shaft analog.
9. one kind adopts the method that in the claims 1-8, arbitrary described coal bed gas well pit shaft internal drainage gas production coal dust transported simulation device carries out coal bed gas well pit shaft internal drainage gas production coal dust transported simulation, it is characterised in that comprise the steps:
1), according to shape space annular space size characteristic in coal bed gas well pit shaft, coal bed gas well pit shaft internal drainage gas production coal dust transported simulation device is assembled；
2), rack body initial level is placed；Lift up the steel wire rope of rack body upper end, open the banking pin of rack body lower end brake castor simultaneously；Steel wire rope lifts up, and coordinates brake castor, regulates pit shaft analog to determining angle, then fixes steel wire rope, and brake castor inserts banking pin, keeps angle of inclination to stablize constant；
3), with reference to scale inside water tank, quantitative clear water is added；Or according to coal bed gas well field working conditions, choose appropriate particle size coal dust, add in water tank, mix the solidliquid mixture determining volumetric concentration, keep being sufficiently stirred for；
4), open vent valve, liquid-filling valve, relief valve, tapping valve, open water pump toward injection liquid in pit shaft analog by controlling terminal, have liquid phase to switch off the pump and relief valve after overflowing until relief valve；
5), selecting gas line flow process, atm number selects vortex-shedding meter and large-capacity valve branch road, and little tolerance selects spinner flowmeter and low discharge valve branch road；Close total gas injection valve, large-capacity valve, low discharge valve, gas storage pot valve, the output port pressure of pressure regulator valve is adjusted to minimum；Opening air compressor by controlling terminal, gas injection in air accumulator, after reaching setup pressure value in air accumulator, air compressor is automatically stopped active standby；When gas storage pressure inside the tank is lower than 1Mpa, air compressor automatically turns on again；
6), select to open low discharge valve or large-capacity valve according to setting simulation gas uninterrupted；Open gas storage pot valve and total gas injection valve, crack relief valve；Regulation and control pressure regulator valve output port pressure, utilizes and carries gas with the pressure differential in pit shaft analog, it is achieved discharge opeing, gas injection, supercharging；
7), progressively regulate and increase pressure regulator valve output port pressure, coordinate crack relief valve to set up pressure in pit shaft analog, force value in Synchronous pit shaft analog；Regulation and control relief valve aperture and pressure regulator valve output port pressure, it is achieved in pit shaft analog under the constant premise of pressure, gas flow increases；Control terminal and open the built-in thermostat of top connection and lower contact, it is achieved the simulation of temperature in pit shaft analog；
8), by controlling terminal unlatching water pump, open liquid-filling valve, standard-sized sheet flow divider, crack eduction valve, and slowly turn down flow divider aperture and increase eduction valve aperture, make liquid inject effusion meter consistent with the show value of fluid flowmeter, suitable with design liquid phase flow rate；
9) migration of coal dust and aggregate and precipitate rule in pit shaft analog, are observed；Change one or several parameter in temperature, pressure, liquid measure, tolerance, solid phase coal dust microparticle concentration, hole deviation, coal bed gas well borehole size feature, observe migration and aggregate and precipitate rule, the change of multiphase flow flow condition of coal dust.
10. method according to claim 9, it is characterised in that: step 3) in the volumetric concentration of solidliquid mixture less than 35%, microparticle particle diameter is not more than 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610214261.2A CN105735966B (en) | 2016-04-07 | 2016-04-07 | Coal bed gas well pit shaft internal drainage gas production coal dust transported simulation device and analogy method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610214261.2A CN105735966B (en) | 2016-04-07 | 2016-04-07 | Coal bed gas well pit shaft internal drainage gas production coal dust transported simulation device and analogy method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105735966A true CN105735966A (en) | 2016-07-06 |
| CN105735966B CN105735966B (en) | 2018-08-17 |
Family
ID=56252996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610214261.2A Expired - Fee Related CN105735966B (en) | 2016-04-07 | 2016-04-07 | Coal bed gas well pit shaft internal drainage gas production coal dust transported simulation device and analogy method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105735966B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106226198A (en) * | 2016-08-19 | 2016-12-14 | 中国石油集团渤海钻探工程有限公司 | Slow-release solid solubility property Lab-evaluation device |
| CN106437694A (en) * | 2016-10-13 | 2017-02-22 | 河南理工大学 | Device for simulating coal-seam hydraulic fracturing effect to monitor discharged excavated pulverized coal change and experimental method thereof |
| CN106640043A (en) * | 2017-02-08 | 2017-05-10 | 中国地质大学（武汉） | Simulation device for movement state of coal powder under coal seam disturbance |
| CN108961969A (en) * | 2018-06-11 | 2018-12-07 | 武汉海王机电工程技术有限公司 | A kind of oil well oil-gas water three-phase gas-lift production processing simulation device |
| CN109799105A (en) * | 2019-01-24 | 2019-05-24 | 西南石油大学 | A kind of rod pumping system experimental provision and method suitable for high gas-liquid ratio oil well |
| CN110067535A (en) * | 2019-03-22 | 2019-07-30 | 中国石油大学(华东) | A kind of unpowered shaft bottom fragmentation coal dust of coal bed gas well helps arranging device |
| CN111173497A (en) * | 2020-01-10 | 2020-05-19 | 中国科学院广州地球化学研究所 | Mobile phase water rock reaction unit |
| CN111537429A (en) * | 2020-05-21 | 2020-08-14 | 中国石油化工股份有限公司 | Shale gas well shaft dynamic corrosion rate simulation measurement device and method |
| CN111810145A (en) * | 2020-07-24 | 2020-10-23 | 中联煤层气有限责任公司 | Experimental device for simulating deep coal seam shaft carrying pulverized coal |
| CN115095320A (en) * | 2022-07-06 | 2022-09-23 | 西南石油大学 | Experimental device for simulating high-low pressure double-layer combined mining of gas reservoir |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050092486A1 (en) * | 1998-06-23 | 2005-05-05 | The University Of Wyoming Research Corporation D/B/A Western Research Institute | Coalbed gas production systems |
| CN102134993A (en) * | 2011-01-22 | 2011-07-27 | 河南理工大学 | Simulation experiment device for controlling production of coal bed methane vertical well |
| CN203035186U (en) * | 2013-01-09 | 2013-07-03 | 中国石油大学(北京) | Visual experiment device and system for pulverized coal settlement of coal-bed gas well shaft |
| CN104900131A (en) * | 2015-04-22 | 2015-09-09 | 中国石油大学(华东) | Experiment method for simulating formation fluid overflow and lost circulation in drilling process |
| CN105043949A (en) * | 2015-06-18 | 2015-11-11 | 中国石油大学(华东) | Simulation experiment device and method for coal powder output in vertical well bore |
| CN105156094A (en) * | 2015-08-14 | 2015-12-16 | 中国矿业大学 | Simulation test apparatus for migration of coal powder produced during production of coalbed methane well |
| CN205477588U (en) * | 2016-04-07 | 2016-08-17 | 中国地质大学（武汉） | Water pumping gas production buggy migration analogue means in gas well pit shaft of coal seam |
-
2016
- 2016-04-07 CN CN201610214261.2A patent/CN105735966B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050092486A1 (en) * | 1998-06-23 | 2005-05-05 | The University Of Wyoming Research Corporation D/B/A Western Research Institute | Coalbed gas production systems |
| CN102134993A (en) * | 2011-01-22 | 2011-07-27 | 河南理工大学 | Simulation experiment device for controlling production of coal bed methane vertical well |
| CN203035186U (en) * | 2013-01-09 | 2013-07-03 | 中国石油大学(北京) | Visual experiment device and system for pulverized coal settlement of coal-bed gas well shaft |
| CN104900131A (en) * | 2015-04-22 | 2015-09-09 | 中国石油大学(华东) | Experiment method for simulating formation fluid overflow and lost circulation in drilling process |
| CN105043949A (en) * | 2015-06-18 | 2015-11-11 | 中国石油大学(华东) | Simulation experiment device and method for coal powder output in vertical well bore |
| CN105156094A (en) * | 2015-08-14 | 2015-12-16 | 中国矿业大学 | Simulation test apparatus for migration of coal powder produced during production of coalbed methane well |
| CN205477588U (en) * | 2016-04-07 | 2016-08-17 | 中国地质大学（武汉） | Water pumping gas production buggy migration analogue means in gas well pit shaft of coal seam |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106226198A (en) * | 2016-08-19 | 2016-12-14 | 中国石油集团渤海钻探工程有限公司 | Slow-release solid solubility property Lab-evaluation device |
| CN106437694A (en) * | 2016-10-13 | 2017-02-22 | 河南理工大学 | Device for simulating coal-seam hydraulic fracturing effect to monitor discharged excavated pulverized coal change and experimental method thereof |
| CN106640043A (en) * | 2017-02-08 | 2017-05-10 | 中国地质大学（武汉） | Simulation device for movement state of coal powder under coal seam disturbance |
| CN108961969A (en) * | 2018-06-11 | 2018-12-07 | 武汉海王机电工程技术有限公司 | A kind of oil well oil-gas water three-phase gas-lift production processing simulation device |
| CN108961969B (en) * | 2018-06-11 | 2021-03-02 | 武汉海王机电工程技术有限公司 | Oil well oil gas water three-phase gas lift oil production process simulation device |
| CN109799105A (en) * | 2019-01-24 | 2019-05-24 | 西南石油大学 | A kind of rod pumping system experimental provision and method suitable for high gas-liquid ratio oil well |
| CN110067535A (en) * | 2019-03-22 | 2019-07-30 | 中国石油大学(华东) | A kind of unpowered shaft bottom fragmentation coal dust of coal bed gas well helps arranging device |
| CN111173497A (en) * | 2020-01-10 | 2020-05-19 | 中国科学院广州地球化学研究所 | Mobile phase water rock reaction unit |
| CN111537429A (en) * | 2020-05-21 | 2020-08-14 | 中国石油化工股份有限公司 | Shale gas well shaft dynamic corrosion rate simulation measurement device and method |
| CN111810145A (en) * | 2020-07-24 | 2020-10-23 | 中联煤层气有限责任公司 | Experimental device for simulating deep coal seam shaft carrying pulverized coal |
| CN115095320A (en) * | 2022-07-06 | 2022-09-23 | 西南石油大学 | Experimental device for simulating high-low pressure double-layer combined mining of gas reservoir |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105735966B (en) | 2018-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105735966A (en) | Coal-bed gas well shaft drainage gas recovery coal dust migration simulation device and simulation method | |
| CN105735965A (en) | Coal-bed gas well shaft drainage gas recovery visual simulation experiment device and simulation method | |
| WO2018103426A1 (en) | Wellbore and formation crack coupled flow simulation experiment device and method | |
| CN110924906B (en) | Gas lift well liquid discharge simulation test device | |
| CN205477589U (en) | Visual simulation experiment device of water pumping gas production in gas well pit shaft of coal seam | |
| CN206256908U (en) | A kind of pit shaft and formation fracture Coupled Flow analogue experiment installation | |
| CN113062733B (en) | Segmented horizontal well water control three-dimensional simulation experiment device and experiment method thereof | |
| CN205477588U (en) | Water pumping gas production buggy migration analogue means in gas well pit shaft of coal seam | |
| CN104989319A (en) | Cementing method based on continuous cementing mode in petroleum exploration | |
| CN207620776U (en) | Gas hydrates pilot production simulator | |
| CN204492810U (en) | A kind of gas liquid two-phase flow changeable quality experimental device | |
| CN206960090U (en) | A kind of test device of slanted well bore concentric double pipe waterpower prop-carrying capacity | |
| CN212111339U (en) | Underground water manual recharge test system | |
| CN115749759B (en) | Evaluation device and evaluation method for sand production rule of oil well fracturing shaft | |
| CN107725028A (en) | A kind of horizontal well AICD intelligent water-controlleds screen casing performance test system | |
| CN208396691U (en) | For testing the imitative experimental appliance of natural gas well atomizing effect | |
| CN201218093Y (en) | Thick oil borehole viscosity-reduction oil-extraction heating apparatus | |
| CN103470233B (en) | A kind of heavy crude reservoir natural gas huff and puff oil recovery process system and oil production method | |
| CN204631661U (en) | A kind of liquid level for gas-liquid separator-pressure linkage control device | |
| CN109598007A (en) | A kind of high liquid-gas ratio gas well underground throttle technological parameter calculation method | |
| CN203905909U (en) | Deep-well adjustable low-density fluid fast liquid discharge well testing device | |
| CN105089567B (en) | Deep-well is adjustable low density flow quick fluid-discharge formation testing device and its operational method | |
| CN107869327A (en) | A kind of coal bed gas well of fixed tubular column pumping and washing process with pressure | |
| CN108661924B (en) | Lifting pump sand discharge capacity testing method | |
| CN218865451U (en) | Stack surrounding type oil well multiphase flow physical simulation experiment device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180817 Termination date: 20200407 |