CN204666470U - Coal dust output analogue experiment installation in a kind of vertical bore - Google Patents
Coal dust output analogue experiment installation in a kind of vertical bore Download PDFInfo
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- CN204666470U CN204666470U CN201520423272.2U CN201520423272U CN204666470U CN 204666470 U CN204666470 U CN 204666470U CN 201520423272 U CN201520423272 U CN 201520423272U CN 204666470 U CN204666470 U CN 204666470U
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Abstract
The utility model discloses coal dust output analogue experiment installation in a kind of vertical bore; This device not only can be simulated coal dust in vertical bore and be carried lower migration and production situation at gas, water, and can simulate single-phase liquid flowing, gas liquid two-phase flow situation in vertical bore.This device is primarily of liquid-supplying system, air supply system, confession pressing system, data and image collection processing system, wherein data acquisition system (DAS) comprises high-definition camera instrument, PIV Particle Image Velocity instrument, the integrated collecting device of the electronics such as various kinds of sensors, they are by the pressure at two ends in wellbore hole simulator, apply electronics integrated equipment, by the speed of wellbore hole simulator pressure at two ends, flowing, flow field, the improve parameter unifications such as flow phenomenon collect terminal and process, and define a comprehensive pit shaft Multiphase Flow simulation experiment platform.This device can simulate coal dust transport conditions in vertical bore, also can realize the research work under kinds of experiments condition, and easy to operate, strong adaptability, has wide range of applications.
Description
Technical field
The utility model belongs to oil and gas technical field, relates generally to coal dust output analogue experiment installation in a kind of vertical bore.This device not only can be simulated coal dust in vertical bore and be carried lower migration and production situation at gas, water, and can simulate single-phase liquid flowing, gas liquid two-phase flow situation in vertical bore.
Background technology
Coal-seam gas refers to that being stored in coal seam take methane as principal ingredient, to be adsorbed on matrix of coal particle surface, part is free in coal hole or the hydrocarbon gas be dissolved in coal seam water, is a kind of unconventional gas resources, is commonly called as gas.Along with the exhaustion day by day of conventional oil resource, increase to the attention degree of coal-bed gas exploitation in the world, coal-seam gas has become the important supplement of conventional gas output.China as producing coal, use coal big country, coal-seam gas rich reserves, rational exploitation and utilization coal bed gas resource, to alleviation China energy shortage, improve energy structure, to reduce dependence on external supply significant.
The usual pressure in coal seam of China is low, permeability is low, adsorbed gas saturation degree is low, and therefore per-well production is low, and economic benefit is not high.In order to improve output, coal bed gas well adopts fracturing methods usually.After pressure break, coal bed gas well can some coal dusts of output.The output of coal dust is subject to the impact of the factors such as gas desorption, Pore throat size, gas-liquid flow velocity.In output process, coal dust can be trapped in the diverse locations such as coal deposits, shaft bottom, pit shaft, lateral segment, causes harmful effect to the production of coal-seam gas, as caused pore throat and hugger blocking, causes pump barrel to wear and tear or holddown accident, even causes and bury pump.Grasp coal dust migration rule in the wellbore, to the migration of the generation of effective prevention and control coal dust, conservative control coal dust, ensure that the normal production of coal bed gas well is significant.The purpose of this utility model is to simulate the output of coal dust in coal-seam gas vertical bore, migration rule, for the formulation of mining system provides foundation.
In addition, at engineering field, the characteristics of motion that is heterogeneous in vertical pipe, complex fluid is a common problem, needs research and development laboratory study device, Multiphase Flow rule in research vertical bore, lays the foundation for solving Wellbore Flow calculating and engineering design in engineering field.
Utility model content
The purpose of this utility model is to provide a kind of coal-seam gas vertical bore coal dust output simulating-estimating device, simulation coal dust is carried condition and the influence factor of output or sedimentation in the wellbore, measure the settling velocity of pulverized coal particle, for the mining design of coal bed gas well provides foundation, it relates to the gas, liquid, solid Multiphase Flow in vertical bore, therefore can also be used to Multiphase Flow rule in simulation vertical bore.
To achieve these goals, the technical solution adopted in the utility model is:
Coal dust output analogue experiment installation in a kind of vertical bore, it comprises a vertical analog pit shaft, and connecting promising its as entrance bottom described wellbore hole simulator provides the liquid-supplying system of constant flow rate liquid, provides the air supply system of constant flow rate gas for it and provide voltage supply and the voltage-stabilizing system of adjustable pressure for it; The top of described wellbore hole simulator is connected with as outlet reclaims cleaning system and data acquisition system (DAS), described data acquisition system (DAS) is by the speed of wellbore hole simulator pressure at two ends, liquid flow and flow field and flow phenomenon is unified collects terminal and process, and defines a comprehensive pit shaft Multiphase Flow simulation experiment platform.
Described liquid-supplying system comprises closed buffer tank, throttling valve and liquid flowmeter, and buffer tank inlet end is connected with liquid source through gate valve, when the pressure of gas is atmospheric pressure state in buffer tank, opens and connects gate valve to adding liquid in tank; During for pressing system pressurization, gate valve is in closed condition, and buffer tank endpiece liquid flows through flow controller under pressure-driven, liquid flowmeter flows to wellbore hole simulator.
Described air supply system comprises air compressor machine, shunt, one-way throttle valve I and gas meter, air compressor machine gas outlet end gas is shunted through shunt, portion gas flows into branch line path through one-way throttle valve I and gas meter, then wellbore hole simulator is flowed to through main line footpath, for wellbore hole simulator provides the gas of constant flow rate.
Described voltage supply and voltage-stabilizing system mainly comprise air compressor machine, shunt, buffer tank and tensimeter; Air compressor machine endpiece flow through bypass device, one-way throttle valve II portion gas flows to buffer tank, and gas compresses in buffer tank, forms the pressure of drive fluid flowing.
The outlet of described buffer tank is in series with a throttling valve, by the regulable control buffer tank driving pressure of throttling valve.
Described data acquisition system (DAS) comprises data acquisition unit and terminal and coupled PIV Particle Image Velocity instrument, high-speed camera instrument, three pressure measurement sensors, liquid flow sensor, gas flow sensors; Described high-speed camera instrument and PIV Particle Image Velocity instrument are arranged on the both sides of wellbore hole simulator respectively, for phenomenon, the Flow Field Distribution of the flowing of real time record wellbore hole simulator, and the movement velocity of particle and fluid;
Two described pressure measurement sensors are arranged on outlet and the entrance of wellbore hole simulator respectively, the pressure reduction of measure analog pit shaft, and two pressure measurement sensors are connected with tensimeter respectively; Another one pressure measurement sensor is for measuring the pressure in buffer tank; Described liquid flow sensor is for measuring the flow of the liquid of buffer tank outlet; Described gas flow sensor is for detecting the gas flow of the one-way throttle valve outlet port of air supply system.
Described recovery cleaning system comprises a recycling can, and described recycling can comprises according to the order of setting laminates screen cloth stacked up and down, and each sieve number of each layer is different, reclaims the recycling of gained solid particle.
Described recycling can inlet end to be exported with wellbore hole simulator by manifold and is connected, and fluid enters into recycling can, is filtered layer by layer by screen cloth, and solid particle is trapped on different eye mesh screens successively, and liquid, by screen cloth, enters apocenosis passage.
Described wellbore hole simulator is internal diameter 50mm, the plexi-glass tubular growing the vertical placement of 6 meters, and its top and bottom end are respectively provided with solid particle and add sand mouth.
The experimental technique of coal dust output analogue experiment installation in described vertical bore:
During the flow state of model fluid under different pressures condition, buffer tank Stress control is realized by voltage supply and voltage-stabilizing system, under one-way throttle valve I closed condition, adjustment wellbore hole simulator bottom pressure and fluid flow are carried out in one-way throttle valve II and throttling valve acting in conjunction, and then change fluid flow state in wellbore hole simulator.Wherein being gathered by pressure transducer and be transferred to terminal of wellbore hole simulator bottom pressure data, cell pressure is demarcated and is corrected and completed by pressure gauge reading.
For fluid mining process under simulation stratum condition, regulate one-way throttle valve II to control buffer tank pressure and be equivalent to change reservoir pressure; Regulate throttling valve object to be change wellbore hole simulator bottom pressure, corresponding being equivalent to, changes bottomhole wellbore pressure.The pressure of buffer tank and wellbore hole simulator bottom pressure is because the physical property of formation rock causes; When throttling valve is all opened, ignore the situation of manifold pressure loss, buffer tank pressure and wellbore hole simulator bottom pressure are equal, now buffer tank can be regarded as the horizontal segment of horizontal well, and wellbore hole simulator is then the perpendicular hole section of horizontal well.
During the simulation flow state of gas-liquid two-phase under different pressures condition, gas-liquid two kinds of fluids enter the forward slip value of wellbore hole simulator, gas-liquid two kinds of fluids enter the forward slip value of wellbore hole simulator, the throttling valve of liquid stream on manifold and liquid flowmeter, buffer tank, one-way throttle valve II, shunt series connection, one-way throttle valve I, gas meter and shunt series connection on gas manifold, two paths are connected in parallel and air compressor UNICOM; Now one-way throttle valve I 1, one-way throttle valve I I, throttling valve three affect the flowing of fluid simultaneously, and the fluid flow in two paths is demarcated by liquid flowmeter, gas meter.First by regulating one-way throttle valve I to regulate buffer tank pressure, after buffer tank pressure stability, regulating throttling valve to carry out the adjustment of fluid flow, regulating one-way throttle valve II adjusting gas flow simultaneously.Determine yield production corresponding in scene, level pressure working condition, in practical operation, with gas-liquid flow for controlled plant, also with wellbore hole simulator bottom pressure for controlled plant, can complete this process, just can unit simulation flow state by experiment.Different pressures condition, different flow condition gas-liquid two-phase nowed forming in wellbore hole simulator alters a great deal, and show as bubble stream, slug flow, circulation, spray, its corresponding flow parameter and conditional parameter are recorded by data acquisition system (DAS).
In simulation coal bed gas well vertical bore during coal dust output process, need preparation to add sand link, by the sanding device at the upper and lower two ends of wellbore hole simulator, the coal water mixed liquid mixed can be injected in wellbore hole simulator.
The beneficial effects of the utility model are as follows:
The utility model can provide a kind of coal-seam gas vertical bore coal dust output simulating-estimating device, be used for simulating condition and the influence factor that coal dust is carried output or sedimentation in the wellbore, measure the settling velocity of pulverized coal particle, for the mining design of coal bed gas well provides foundation; It also relates to the gas, liquid, solid Multiphase Flow in vertical bore, therefore can also be used to Multiphase Flow rule in simulation vertical bore.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the main body schematic diagram of utility model,
Fig. 2 is the structural representation of utility model,
In figure: 1 buffer tank, 2 wellbore hole simulators, 3 recycling cans, 4 collectors and terminal, 5 air compressor, 6 high-speed camera instrument, 7 liquid flow sensors, 8 pressure transducers, 9 gas flow sensors, 10 pressure transducers, 11 tensimeters, 12 tensimeters, 13 tensimeters, 14 gas meters, 15 liquid flowmeters, 16 shunts, 17 one-way throttle valve I, 18 throttling valve, 19 pressure transducers, 20 one-way throttle valve II, 21 PIV Particle Image Velocity instrument.
Embodiment
Embodiment 1
As Fig. 1, shown in 2, in a kind of vertical bore, coal dust output analogue experiment installation, comprises the air supply system providing constant flow rate gas, the liquid-supplying system of constant flow rate liquid is provided, adjustable voltage supply and voltage-stabilizing system, intelligent multi-function data and image collection processing system, and be arranged at wellbore hole simulator system outlet for fluid and the recovery of entering be separated and cleaning system, specifically comprise closed pressure vessel buffer tank 1, high strength organic glass tubing string 2, can solid particle be recycled and there is the recycling can 3 of sewer effect, intelligent easy-operating collector and terminal 4, voltage supply air feed equipment air compressor 5, high-speed camera instrument 6, all kinds of electronic data acquisition device liquid flow sensor 7, gas flow sensor 9, pressure transducer 8, 10, 19, conventional instrument tensimeter 11, 12, 13, gas meter 14, liquid flowmeter 15, the shunt 16 that voltage supply and air supply system are together in series, valve and by-pass valve control one-way throttle valve I 17, II20, throttling valve 18 accurately can measure the PIV Particle Image Velocity instrument 21 in flowing velocity and flow field.
Wherein, described liquid-supplying system mainly comprises closed buffer tank 1, throttling valve 18 and liquid flowmeter 15, buffer tank 1 inlet end is connected with liquid source through gate valve 21, and when in tank, the pressure of gas is atmospheric pressure state, opening connection gate valve 21 can to adding liquid in tank.During for pressing system pressurization, gate valve 21 is in closed condition, and buffer tank endpiece liquid flows through flow controller 18 under pressure-driven, liquid flowmeter 15 flows to wellbore hole simulator;
Described air supply system mainly comprises air compressor machine 5, shunt 16, one-way throttle valve 16 and gas meter 14, air compressor machine 5 gas outlet end gas is shunted through shunt 15, portion gas flows into branch line path through one-way throttle valve 16, flows to wellbore hole simulator through main line footpath.This system can replace air compressor machine to realize with high-pressure gas cartridge;
Described voltage supply and voltage-stabilizing system mainly comprise air compressor machine 5, shunt 16, buffer tank 1 and tensimeter 11.Air compressor machine 5 endpiece flow through bypass device 16, one-way throttle valve II20 portion gas flows to buffer tank 1, and because gas compresses in buffer tank 5, form the pressure of drive fluid flowing, wherein the adjustment of throttling valve can control buffer tank 1 driving pressure;
Described data and image collection processing system by liquid flowmeter 15, gas meter 14, tensimeter 11,12,13, pressure measurement sensor 8,10,19, liquid flow sensor 7, gas flow sensor 9, liquid flowmeter 15, gas meter 14, high-speed camera instrument 6, PIV Particle Image Velocity instrument 21, data acquisition unit and terminal 4 form, wherein physical measuring device is mainly in order to proofread correlation parameter, and electron collection system gathers correlation parameter in order to intellectuality and transfers data to terminal does further process.High-speed camera instrument 6, PIV Particle Image Velocity instrument 21 is configured with in wellbore hole simulator both sides, phenomenon, the Flow Field Distribution of equipment real time record wellbore hole simulator 2 flowing in experiment, the movement velocity etc. of particle and fluid, the image that equipment gathers and real-time data transmission to terminal, the mobility status in being tested by digital image processing techniques real time record in tubing string;
Described recovery cleaning system and recycling can 3 comprise laminates screen cloth, and multiple cloth screen cloth is stacked up and down in a certain order, and each sieve number is different, and reclaiming gained solid particle can reuse.Recycling can 3 inlet end to be exported with wellbore hole simulator 2 by manifold and is connected, and fluid enters into recycling can 3, is filtered layer by layer by screen cloth, solid particle is trapped in 20 eye mesh screens successively, 30 eye mesh screens, 40 eye mesh screens, 60 eye mesh screens, 70 eye mesh screens, 80 eye mesh screens, 100 eye mesh screens, on 120 eye mesh screens, liquid, by screen cloth, enters apocenosis passage.
Analogy method is as follows:
1. when the flow state of model fluid under different pressures condition, buffer tank 1 Stress control is realized by voltage supply and voltage-stabilizing system, under one-way throttle valve I 17 closed condition, adjustment wellbore hole simulator 2 bottom pressure and fluid flow are carried out in one-way throttle valve II20 and throttling valve 18 acting in conjunction, and then change fluid flow state in wellbore hole simulator 2; Wherein being gathered by pressure transducer 19 and be transferred to terminal 4 of wellbore hole simulator 2 bottom pressure data;
When under simulation stratum condition during fluid mining process, regulate one-way throttle valve II20 to control buffer tank pressure and be equivalent to change reservoir pressure; Regulate throttling valve 18 to change wellbore hole simulator bottom pressure, be equivalent to change bottomhole wellbore pressure; The pressure of buffer tank 1 and wellbore hole simulator 2 bottom pressure is caused by the physical property of formation rock; When throttling valve 18 is all opened, ignore the situation of manifold pressure loss, buffer tank 1 pressure and wellbore hole simulator 2 bottom pressure are equal, at this moment buffer tank are regarded as the horizontal segment of horizontal well feed flow, and wellbore hole simulator is then the perpendicular hole section of horizontal well;
When simulating the flow state of gas-liquid two-phase under different pressures condition, gas-liquid two kinds of fluids enter the forward slip value of wellbore hole simulator 2, the throttling valve 18 of liquid stream on manifold and liquid flowmeter 15, buffer tank 1, one-way throttle valve II20, shunt 16 are connected, one-way throttle valve I 17 on gas manifold, gas meter 14 and shunt 16 are connected, and two paths are connected in parallel and air compressor 5 UNICOM; Now one-way throttle valve I 17, one-way throttle valve II20, throttling valve 18 three affect the flowing of fluid simultaneously, and the fluid flow in two paths is demarcated by liquid flowmeter 15, gas meter 14; First by regulating one-way throttle valve I 17 to regulate buffer tank pressure, after buffer tank pressure stability, regulating throttling valve 18 to carry out the adjustment of fluid flow, regulating one-way throttle valve II20 adjusting gas flow simultaneously; Different pressures condition, different flow condition gas-liquid two-phase nowed forming in wellbore hole simulator alters a great deal, and show as bubble stream, slug flow, circulation, spray, its corresponding flow parameter and conditional parameter are recorded by data acquisition system (DAS).
Different pressures condition, different flow condition gas-liquid two-phase nowed forming in wellbore hole simulator alters a great deal, and show as bubble stream, slug flow, circulation, spray, its corresponding flow parameter and conditional parameter are recorded by acquisition system.
Embodiment 2, by reference to the accompanying drawings 1, the utility model is described in further detail.
Study of Fluid carries the ability of pulverized coal particle in vertical tubing string, and wellbore hole simulator respectively has a sanding device up and down, and wellbore hole simulator 2 diverse location adds sand mouth and adds sand.
Fluid carries in the research process of solid particle ability in vertical tubing string, the unidirectional liquid stream in the control reference example 1 of flowing environment and biphase gas and liquid flow.
In this flowing environment, solid particle by high-speed camera equipment record, and is real-time transmitted to terminal in the change of mobility status in tubing string.
By reference to the accompanying drawings embodiment of the present utility model is described although above-mentioned; but the restriction not to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection domain of the present utility model.
Claims (9)
1. coal dust output analogue experiment installation in a vertical bore, it is characterized in that: it comprises a vertical analog pit shaft, connecting promising its as entrance bottom wellbore hole simulator provides the liquid-supplying system of constant flow rate liquid, provides the air supply system of constant flow rate gas for it and provides voltage supply and the voltage-stabilizing system of adjustable pressure for it; The top of wellbore hole simulator is connected with as outlet reclaims cleaning system and data acquisition system (DAS), described data acquisition system (DAS) is by the speed of wellbore hole simulator pressure at two ends, liquid flow and flow field and flow phenomenon is unified collects terminal and process, and defines a comprehensive pit shaft Multiphase Flow simulation experiment platform.
2. coal dust output analogue experiment installation in vertical bore as claimed in claim 1, it is characterized in that: described liquid-supplying system comprises closed buffer tank (1), throttling valve (18) and liquid flowmeter (15), buffer tank (1) inlet end is connected with liquid source through gate valve (21), when the pressure of gas is atmospheric pressure state in buffer tank, opens and connect gate valve (21) to adding liquid in tank; During for pressing system pressurization, gate valve (21) is in closed condition, and buffer tank endpiece liquid flows through flow controller (18) under pressure-driven, liquid flowmeter (15) flows to wellbore hole simulator.
3. coal dust output analogue experiment installation in vertical bore as claimed in claim 1, it is characterized in that: described air supply system comprises air compressor machine (5), shunt (16), one-way throttle valve I (17) and gas meter (14), air compressor machine (5) gas outlet end gas is shunted through shunt (16), portion gas flows into branch line path through one-way throttle valve I (17) and gas meter (14), then wellbore hole simulator is flowed to through main line footpath, for wellbore hole simulator provides the gas of constant flow rate.
4. coal dust output analogue experiment installation in vertical bore as claimed in claim 1, is characterized in that: described voltage supply and voltage-stabilizing system mainly comprise air compressor machine (5), shunt (16), buffer tank (1) and tensimeter (11); Air compressor machine (5) endpiece flow through bypass device (16), one-way throttle valve II (20) portion gas flows to buffer tank (1), gas is compression in buffer tank (1), forms the pressure of drive fluid flowing.
5. coal dust output analogue experiment installation in vertical bore as claimed in claim 4, it is characterized in that: the outlet of described buffer tank is in series with a throttling valve (18), by regulable control buffer tank (1) driving pressure of throttling valve (18).
6. coal dust output analogue experiment installation in vertical bore as claimed in claim 1, is characterized in that: described data acquisition system (DAS) comprises data acquisition unit and terminal (4) and coupled PIV Particle Image Velocity instrument (21), high-speed camera instrument (6), pressure measurement sensor (8,10,19), liquid flow sensor (7), gas flow sensor (9);
Described high-speed camera instrument (6) and PIV Particle Image Velocity instrument (21) are arranged on the both sides of wellbore hole simulator respectively, for phenomenon, Flow Field Distribution that real time record wellbore hole simulator (2) flows, the movement velocity of particle and fluid;
Described pressure measurement sensor (8,19) is arranged on outlet and the entrance of wellbore hole simulator respectively, the pressure reduction of measure analog pit shaft, and described pressure measurement sensor (8,19) is connected with tensimeter (12,13) respectively; Described pressure measurement sensor (10) is for measuring the pressure in buffer tank;
Described liquid flow sensor (7) is for measuring the flow of the liquid of buffer tank outlet; Described gas flow sensor (9) is for detecting the gas flow of the one-way throttle valve outlet port of air supply system.
7. coal dust output analogue experiment installation in vertical bore as claimed in claim 1, it is characterized in that: described recovery cleaning system comprises a recycling can (3), described recycling can (3) comprises according to the order of setting laminates screen cloth stacked up and down, and each sieve number of each layer is different, reclaim the recycling of gained solid particle.
8. coal dust output analogue experiment installation in vertical bore as claimed in claim 8, it is characterized in that: described recycling can (3) inlet end to be exported with wellbore hole simulator (2) by manifold and is connected, fluid enters into recycling can (3), filtered layer by layer by screen cloth, solid particle is trapped on different eye mesh screens successively, liquid, by screen cloth, enters apocenosis passage.
9. coal dust output analogue experiment installation in vertical bore as claimed in claim 8, is characterized in that: described wellbore hole simulator is internal diameter 50mm, the plexi-glass tubular growing the vertical placement of 6 meters, and its top and bottom end are respectively provided with solid particle and add sand mouth.
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| CN201520423272.2U CN204666470U (en) | 2015-06-18 | 2015-06-18 | Coal dust output analogue experiment installation in a kind of vertical bore |
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| CN201520423272.2U CN204666470U (en) | 2015-06-18 | 2015-06-18 | Coal dust output analogue experiment installation in a kind of vertical bore |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105043949B (en) * | 2015-06-18 | 2016-04-13 | 中国石油大学(华东) | Coal dust output analogue experiment installation and method in a kind of vertical bore |
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