CN103015975A - Gas production rate testing simulation device of coal-bed gas vertical well - Google Patents
Gas production rate testing simulation device of coal-bed gas vertical well Download PDFInfo
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Abstract
The invention discloses a gas production rate testing simulation device of a coal-bed gas vertical well. The gas production rate testing simulation device comprises a coal reservoir simulation system, a permeability testing system, a data display control system and an extraction simulation control system, wherein the coal reservoir simulation system, the permeability testing system and the extraction simulation control system are connected with one another in sequence through pipelines; and the coal reservoir simulation system, the permeability testing system and the extraction simulation control system are respectively connected with the data display control system through data wires. According to the invention, gas and water flowing states in the extraction process caused by different extraction strength, different pressure gradients at different distances from a wellhead, different coal reservoir permeabilities, different coal reservoir energies and the like can be comprehensively taken into consideration; and the gas production rates under various different situations can be more accurately metered so as to preferably know the degrees of the influences of these parameters on the gas production rate.
Description
Technical field
The invention belongs to coal bed gas safety production technique field, relate in particular to a kind of coal bed gas peupendicular hole gas production test simulator.
Background technology
Coal gas industry is the industry of " excessive risk, high investment, reciprocation cycle are long ", and this industrial character has determined to carry out more accurately that economic evaluation just seems extremely important before the exploitation of coal bed gas is carried out on ground.Can earn a profit, by dropping into and two conditional decisions of output.Important indicator in the input comprises engineering cost and the managerial expenses such as drilling well, well logging, well cementation, pressure break and row adopt, the expense of engineering aspect is more transparent comparatively speaking, it is not very large coming in and going out with reality during economic evaluation, managerial expense is rule of thumb also estimated than being easier to, and is also little with the discrepancy of reality.Important indicator in the coal bed gas product is the gas production in unit area, unit interval, the compositions such as aerogenesis time, price.Price is estimated than being easier to.Therefore, the gas production in the unit area, unit interval and the accurate judgement of the aerogenesis time order of accuarcy that whether directly determined economic evaluation.
In order to obtain more accurately production capacity, the researcher adopts the methods such as volumetric method, theoretical formula and volume combined techniques, Predicting The Recovery Efficiency method, history matching and numerical simulation that production capacity is studied both at home and abroad.The major defect of volumetric method is too much not consider geology and engineering factor to the impact of production capacity, predicts the outcome and comes in and goes out very large with reality; Theoretical formula and volume combined techniques relative volume method are a kind of progress, relatively considered the impact of some reservoir parameters on production capacity, the capability forecasting result compares with volumetric method and increases, but does not consider the pilot process of aerogenesis because of it, but and come in and go out still larger between the actual result; The Predicting The Recovery Efficiency method also is based on theoretical calculating, and whole reservoir is processed as flight data recorder, does not also too much consider the pilot process of aerogenesis, and it is also not satisfactory to predict the outcome.It is many methods that adopts at present that method for numerical simulation combines with the history matching method, mainly be to adopt data by row, adjust analog parameter, it is relatively identical to make itself and historical row adopt data, but this method manual control factor is very large, do not having row to adopt the area of data, predicting the outcome is subjected to artificial disturbance very large, estimates and can not make more objectively more accurately.How for different coal seam reservoirs features, draw more accurately coal bed gas well capacity, then be implement with a definite target in view the ground coal bed gas engineering, be the important leverage that reduces the construction investment risk, improves coal gas industry status in people mind.
Summary of the invention
The present invention provides accurately coal bed gas peupendicular hole gas production test simulator of a kind of coal bed gas well capability forecasting in order to solve weak point of the prior art.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: coal bed gas peupendicular hole gas production test simulator, comprise coal seam reservoirs simulation system, permeability test macro, data display control program and extraction analog control system, coal seam reservoirs simulation system, permeability test macro and extraction analog control system are connected and are connected by pipeline, and coal seam reservoirs simulation system, permeability test macro and extraction analog control system are connected by data wire and are connected with the data display control program.
Described coal seam reservoirs simulation system comprises three parts that structure is identical, each part includes the high-pressure metal cylinder, gas cylinder, the first tank, the first gas compressor, the first tracheae, the first water pipe, the first water injecting pump, the first gas flowmeter, the first liquid flow meter, the first pressure sensor, the one PID valve, the second pressure sensor and the 2nd PID valve, connect by the first tube connector between adjacent two high-pressure metal cylinders, gas cylinder is connected on the first tube connector by the first tracheae, the first water pipe two ends respectively with the first tank be connected tracheae and be connected, the first gas compressor, the first gas flowmeter, the first pressure sensor, the one PID valve is located on the first tracheae in turn along airflow direction, the first water injecting pump, the first liquid flow meter, the second pressure sensor and the 2nd PID valve are located on the first water pipe in turn along water (flow) direction, and the first tube connector is provided with the 3rd pressure sensor and the 3rd PID valve; The first pressure sensor, the second pressure sensor, the 3rd pressure sensor, a PID valve, the 2nd PID valve and the 3rd PID valve are connected with the data display control program respectively by described data wire.
Described permeability test macro comprises gas-liquid separator, the second water injecting pump, the 4th pressure sensor, the second liquid flow meter, the second gas compressor, the 5th pressure sensor, the second gas flowmeter and air and liquid mixer, gas-liquid separator is connected with one of them high-pressure metal cylinder by the second tube connector, the second tube connector is provided with the 6th pressure sensor and the 4th PID valve, the gas outlet of gas-liquid separator is connected by the second tracheae with the import of air and liquid mixer, the liquid outlet of gas-liquid separator is connected with the second tracheae by the second water pipe, the second gas compressor, the 5th pressure sensor, the second gas flowmeter is located on the second tracheae in turn along airflow direction, the second water injecting pump, the 4th pressure sensor, the second liquid flow meter is located on the second water pipe in turn along current; The 4th pressure sensor, the 5th pressure sensor, the 6th pressure sensor and the 4th PID valve are connected with the data display control program respectively by described data wire.
Described extraction analog control system comprises motor, velocity sensor, runner, rotating shaft, cylinder, pull bar, piston, the second tank, air bag, the 3rd gas flowmeter and the 3rd fluid flowmeter, cylinder end and sidepiece are respectively equipped with import and outlet, the import of cylinder is connected with the outlet of air and liquid mixer by the 3rd tube connector, be provided with in turn the 7th pressure sensor along the gas-liquid flow direction on the 3rd tube connector, the 5th PID valve and back-pressure valve, the output shaft of motor is in transmission connection by conveyer belt and runner, velocity sensor is located on the output shaft of motor, rotating shaft is fixedly connected with runner is coaxial, rotating shaft is provided with U-shaped change, one end and the change of pull bar are hinged, the other end of pull bar is connected with piston, piston is slidingly connected in the cylinder, the outlet of cylinder by the 4th tube connector respectively with air bag be connected tank and be connected, the 3rd gas flowmeter is located on the 4th tube connector that closes on air bag, and the 3rd fluid flowmeter is located on the 4th tube connector that closes on the second tank; The 7th pressure sensor, the 5th PID valve and velocity sensor are connected with the data display control program respectively by described data wire.
Described data display control program is computer.
Adopt technique scheme, the present invention is comprised of four major parts such as coal seam reservoirs simulation system, permeability test macro, data display control program and extraction analog control systems.The coal seam reservoirs simulation system mainly be when reservoir properties and row adopt under the distance well head different distance gas, water mutually the water, the gas phase relative permeability that cause of impact simulate; The coal seam reservoirs simulation system is comprised of three identical parts of series connection, each part is comprised of coal seam reservoirs analogue means, Pneumatic controller and hydraulic control device, the coal seam reservoirs analogue means mainly installs the coal sample of full difference or approximately uniform permeability, in order to the permeability of simulation apart from the coal seam reservoirs of pit shaft different distance, Pneumatic controller is mainly used to the row of the simulation air pressure energy in the coal seam reservoirs when adopting, the flow of water in the coal seam reservoirs when adopting that hydraulic control device is mainly used to the row of simulation.When the permeability test macro is mainly adopted gas in the process, water single-phase flow to row or gas phase permeability, water phase permeability and gas phase relative permeability, water relative permeability during mixed flow test.The data display control program mainly is that row's process of adopting is monitored and carried out the data collection.The row that the extraction analog control system is mainly used to simulate coal bed gas well adopts, and comprises that row adopts power set and gas, aquatic products amount gathering-device.
The present invention is directed to present various Forecasting Methodology and can't dope more accurately the vertical well capacity of coal bed gas, the problem quite different with objective reality predicts the outcome, take into full account factors such as adopting intensity apart from the difference of the reservoir physical parameter of well head different distance with row to the impact of production capacity, simulated field reservoir and row adopt condition, gas production to the output process is measured, draw different permeabilities, different gas production of arranging under the conditions such as adopting working system are the formulation of working system under the different reservoir Parameter Conditions, certain row adopts the accurate capability forecasting of coal bed gas peupendicular hole under the intensity, accurately economic evaluation provides foundation.
The present invention can the real-time row of measuring adopts the difference of pressure reduction that the difference of gas in the process, current gesture, different well spacing cause etc., the difference of the water that causes, gas phase relative permeability and single permeability, it is carried out than accurate-metering, better understand these parameters to the influence degree of water, gas permeability.
The present invention can consider row and adopt the row that the difference of intensity, the barometric gradient apart from the well head different distance, coal seam reservoirs permeability, coal seam reservoirs energy etc. causes and adopt Process Gas, water flow state, the difference of the gas production that gas, water cause the difference of permeability etc., and the gas production under the various different situations measured more exactly, in order to better understand these parameters to the influence degree of gas production.
Description of drawings
Fig. 1 is structural representation of the present invention.
The specific embodiment
As shown in Figure 1, coal bed gas peupendicular hole gas production test simulator of the present invention, comprise coal seam reservoirs simulation system I, permeability test macro II, data display control program III and extraction analog control system IV, coal seam reservoirs simulation system I, permeability test macro II and extraction analog control system IV are connected and are connected by pipeline, and coal seam reservoirs simulation system I, permeability test macro II and extraction analog control system IV are connected with data display control program III by data wire 24 respectively.
Coal seam reservoirs simulation system I comprises three parts that structure is identical, each part includes high-pressure metal cylinder 9, gas cylinder 1, the first tank 2A, the first gas compressor 3A, the first tracheae 25, the first water pipe 26, the first water injecting pump 4A, the first gas flowmeter 5A, first liquid flow meter 6A, the first pressure sensor 7A, the one PID valve 8A, the second pressure sensor 7B and the 2nd PID valve 8B, connect by the first tube connector 27 between adjacent two high-pressure metal cylinders 9, gas cylinder 1 is connected on the first tube connector 27 by the first tracheae 25, the first water pipe 26 two ends respectively with the first tank 2A be connected tracheae 25 and be connected, the first gas compressor 3A, the first gas flowmeter 5A, the first pressure sensor 7A, the one PID valve 8A is located on the first tracheae 25 in turn along airflow direction, the first water injecting pump 4A, first liquid flow meter 6A, the second pressure sensor 7B and the 2nd PID valve 8B are located on the first water pipe 26 in turn along water (flow) direction, and the first tube connector 27 is provided with the 3rd pressure sensor 7C and the 3rd PID valve 8C; The first pressure sensor 7A, the second pressure sensor 7B, the 3rd pressure sensor 7C, a PID valve 8A, the 2nd PID valve 8B and the 3rd PID valve 8C are connected with data display control program III respectively by described data wire 24.
The variation of the physical parameter such as reservoir permeability when three parts of coal seam reservoirs simulation system I link to each other with simulated range well head different distance successively.The larger coal sample of the reservoir fracture development degree difference of can coalingging in the high-pressure metal cylinder 9 also can fill the little coal sample of cranny development degree difference, better simulates the different regions conditions of coal bed gas reservoir.Each part is provided with air pressure analog control device, hydraulic analogue control device simulation row and adopts the different of air pressure energy and the flow of water in the reservoir different phase.Wherein, the air pressure analog control device is mainly by the experimental needs of gas cylinder 1(, the gas of gas cylinder 1 must have weak adsorptivity to coal sample, propose and be set to He), the first gas compressor 3A, the first gas flowmeter 5A, the first pressure sensor 7A, the one PID valve 8A(PID valve can realize arranging pressure reduction, come by-pass valve control to open and close, pressure difference is free setting as the case may be, pressure reduction can not wait from 0.01MPa～10MPa, the PID valve can satisfy the following pressure of 10MPa) etc. composition, mainly by gas compressor the injecting gas pressurization with being set, PID valve control pressurization value is simulated row's air pressure energy and can realize opening and closing automatically of gas when adopting, in order to simulate more realistically the gas generation process of reservoir.The hydraulic analogue control device mainly is comprised of the first tank 2A, the first water injecting pump 4A, first liquid flow meter 6A, the second pressure sensor 7B and the 2nd PID valve 8B etc. of volume 3m * 2m * 2m, mainly comes the simulated water pressure energy system by water injecting pump 4A pressurization and the 2nd PID valve 8B control pressurization value.Simultaneously by single-phase flow and the two-phase flow that a PID valve 8A and the 2nd PID valve 8B simulation row adopts gas in the process, water in air pressure, the hydraulic analogue control device, influencing each other when simulation gas, water flow are set.Air pressure, hydraulic analogue control device all link to each other with the volume 100mm * 100mm of the different permeability coal sample of packing into * 100mm cube high-pressure metal cylinder 9, high-pressure metal cylinder 9 is connected with the 3rd pressure sensor 7C and the 3rd PID valve 8C, the 3rd PID valve 8C that wherein is attached thereto by setting simulates the difference of starting pressure gradient in the various piece, simulates influencing each other when each stage, reservoir row adopted.Wherein the first pressure sensor 7A in the coal seam reservoirs simulation system I, the second pressure sensor 7B, the 3rd pressure sensor 7C, a PID valve 8A, the 2nd PID valve 8B and the 3rd PID valve 8C all link to each other with data display control program III by data wire 24 etc., to realize controlling in real time experimentation.
Permeability test macro II comprises gas-liquid separator 10, the second water injecting pump 4B, the 4th pressure sensor 7D, second liquid flow meter 6B, the second gas compressor 3B, the 5th pressure sensor 7E, the second gas flowmeter 5B and air and liquid mixer 11, gas-liquid separator 10 is connected with one of them high-pressure metal cylinder 9 by the second tube connector 28, the second tube connector 28 is provided with the 6th pressure sensor 7F and the 4th PID valve 8D, the gas outlet of gas-liquid separator 10 is connected by the second tracheae 29 with the import of air and liquid mixer 11, the liquid outlet of gas-liquid separator 10 is connected with the second tracheae 29 by the second water pipe 30, the second gas compressor 3B, the 5th pressure sensor 7E, the second gas flowmeter 5B is located on the second tracheae 29 in turn along airflow direction, the second water injecting pump 4B, the 4th pressure sensor 7D, second liquid flow meter 6B is located on the second water pipe 30 in turn along current; The 4th pressure sensor 7D, the 5th pressure sensor 7E, the 6th pressure sensor 7F and the 4th PID valve 8D are connected with data display control program III respectively by described data wire 24.
Permeability test macro II mainly is that simulation test row adopts gas in the process, water single-phase flow permeability, gas, water two-phase gas, water flow be on its separately impact of relative permeability, the influencing each other to infiltrative change of each stage coal seam reservoirs gas of measuring distance well head different distance, water flow.Row is when adopting, after gas and liquid flow through high-pressure metal cylinder 9, and the pressure that flows out this moment by the 6th pressure sensor 7F record.The 4th PID valve 8D is installed between gas-liquid separator 10 and the 6th pressure sensor 7F, comes to simulate more really the pressure loss that causes owing to starting pressure gradient difference apart from the pit shaft different distance in the coal seam reservoirs by the starting pressure that the 4th PID valve 8D is set.Gas-liquid separator 10 is mainly used to an effluent air to be separated with liquid.After gas-liquid separator 10 separates, gas circuit by the second gas compressor 3B so that the pressure when returning to firm the outflow, for the accurate-metering of follow-up gas is prepared.The water route by the second water injecting pump 4B in order to return to pressure when flowing out, for the accurate-metering of follow-up water is prepared.After having recorded respectively effluent air and fluid flow by the second gas flowmeter 5B and second liquid flow meter 6B, compile through air and liquid mixer 11.The gas flow that flows out by record, flow, the pressure of water and flow out the pressure, flow etc. of high-pressure metal cylinder 9, come to row adopt water relative permeability in the process, the gas phase relative permeability is calculated.
Extraction analog control system IV comprises motor 12, velocity sensor 13, runner 15, rotating shaft 31, cylinder 19, pull bar 20, piston 21, the second tank 2B, air bag 16, the 3rd gas flowmeter 5C and the 3rd fluid flowmeter 6C, cylinder 19 ends and sidepiece are respectively equipped with import and outlet, the import of cylinder 19 is connected with the outlet of air and liquid mixer 11 by the 3rd tube connector 32, be provided with in turn the 7th pressure sensor 7G along the gas-liquid flow direction on the 3rd tube connector 32, the 5th PID valve 8E and back-pressure valve 22, the output shaft 17 of motor 12 is in transmission connection by conveyer belt 14 and runner 15, velocity sensor 13 is located on the output shaft 17 of motor 12, rotating shaft 31 and runner 15 coaxial being fixedly connected with, rotating shaft 31 is provided with U-shaped change 33, one end and the change 33 of pull bar 20 are hinged, the other end of pull bar 20 is connected with piston 21, piston 21 is slidingly connected in the cylinder 19, the outlet of cylinder 19 by the 4th tube connector 34 respectively with air bag 16 be connected tank 2B and be connected, the 3rd gas flowmeter 5C is located on the 4th tube connector 34 that closes on air bag 16, and the 3rd fluid flowmeter 6C is located on the 4th tube connector 34 that closes on the second tank 2B; The 7th pressure sensor 7G, the 5th PID valve 8E are connected with velocity sensor and are connected with data display control program III respectively by described data wire 24.
Extraction analog control system IV mainly is the variation that simulation row adopts process peripheral energy system, for coal seam reservoirs simulation system I provides negative pressure, gas, aquatic products is gone out and output is measured.Extraction analog control system IV mainly comprises two parts, one provides the drainage device of power, output shaft 17 by motor 12 drives rotating shaft 31 rotations by driving-belt 14, change 33 drives piston 21 is done reciprocation type in cylinder 19 piston movement by pull bar 20 in the rotating shaft 31, to discharge by the G﹠W of permeability test macro II, wherein motor 12 rotating speeds can be adjusted according to the experiment demand, arrange the variation of adopting intensity with simulation, back-pressure valve 22 is adopted the continuity of permeability test macro II pressure drop in the process simultaneously for the row of assurance.The 2nd, collect metering device, the air bag 16 main gases of collecting, the tolerance that the 3rd gas flowmeter 5C metering is collected; The second tank 2B collects liquid, and arranges the water of adopting with the 3rd fluid flowmeter 6C metering.
Data display control program III is computer 23, the Real Time Monitoring experimentation.Wherein by being connected with the first pressure sensor 7A, the second pressure sensor 7B, the 3rd pressure sensor 7C, a PID valve 8A, the 2nd PID valve 8B and the 3rd PID valve 8C in the coal seam reservoirs simulation system I, by computer 21 force value of a PID valve 8A, the 2nd PID valve 8B and the 3rd PID valve 8C is set, realizes that the production capacity of row being adopted gas, water single-phase flow or gas, water two-phase flow and different reservoir control system in the process controls.By with permeability test macro II in the 4th pressure sensor 7D, the 5th pressure sensor 7E, the 6th pressure sensor 7F be connected with the 4th PID valve 8D, equate by being arranged so that the pressure before and after the gas-liquid mixed.By linking to each other with extraction analog control system IV medium velocity sensor 13, realize the monitoring to motor 12 rotating speeds.
When the present invention uses in work, adopt following steps:
(1) the coal sample group system is standby
Gather the different coal sample of permeability according to requirement of experiment, make 100mm * 100mm * 100mm cube, and carry out assembled classification according to high, medium and low three levels of permeability, namely all contain high, medium and low 3 coal samples of permeability in every group of coal sample; (simulation reservoir permeability difference is on the impact of starting pressure gradient) also can be chosen the approximate coal sample of permeability according to the difference of experiment purpose and divide into groups, and same every group is 3 coal samples.(simulation row adopts distance to the impact of starting pressure gradient)
(2) airtight test
According to the signal connecting line of Fig. 1, and in system, inject a small amount of gas, check the tightness of whole system.
(3) grouping arranges
In conjunction with on-the-spot well-log information, choose the coal sample that 3 groups of (can change according to experiment purpose) permeability have contrast property, every group of coal sample tested respectively.Every group of coal sample is positioned in three high-pressure metal cylinders 9 successively according to permeability order from high to low, adopts data according to permeability of coal sample in three high-pressure metal cylinders 9 with well logging row, set gradually the 3rd PID valve 8C and the 4th PID valve 8D by the starting pressure gradient.Air pressure inside, hydraulic pressure energy system according to log data setting coal seam reservoirs namely set gradually the first gas compressor 3A and the first water injecting pump 4A; Adopt data according to row, set successively the conversion that a PID valve 8A, the 2nd PID valve 8B the 3rd PID valve 8C and the 4th PID valve 8D realize gas, water list two-phase flow.
(4) testing permeability setting
Gas, water are set the second gas compressor 3B with the second water injecting pump 4B power so that the 4th pressure sensor 7D, the 4th pressure sensor 7E and the 6th pressure sensor 7F equate according to the 6th pressure sensor 7F after gas-liquid separator 10 separates; When gas, water pass through air and liquid mixer 11 from new mixing, set the 5th PID valve 8E so that the 7th pressure sensor 7G equates with the 6th pressure sensor 7F, the value of the second gas flowmeter 5B, second liquid flow meter 6B and the 6th pressure sensor 7F in the then real time record experiment.
(5) experiment and Data Collection record
Respectively 3 groups of coal samples are tested, open gas, penstock all in the coal seam reservoirs simulation system I, start motor 12 in the extraction simulation system IV, test, the tolerance of the 3rd gas flowmeter 5C metering in the real-time collecting record extraction simulation system IV, the water yield of the 3rd fluid flowmeter 6C metering; The water yield of the tolerance of the second gas flowmeter 5B metering and second liquid flow meter 6B metering in the testing permeability system II; Data gather and computer 23, and carry out Real Time Monitoring and record by computer 23; Change the rotating speed of motor 12, the tolerance of record output flow meter the 3rd gas flowmeter 5C metering, the variation of the water yield data of the 3rd fluid flowmeter 6C metering, the tolerance of the second gas flowmeter 5B metering and the water yield of second liquid flow meter 6B metering and the variation of the 7th pressure sensor 7G in the record testing permeability system II record among the coal seam reservoirs simulation system I separately the first gas flowmeter 5A, first liquid flow meter 6A, the first pressure sensor 7A, the second pressure sensor 7B, the 3rd pressure sensor 7C, the variation of the 4th pressure sensor 7D and the 5th pressure sensor 7E.
(6) data preparation and analysis
By the data record to the measurement mechanisms such as gas flowmeter, fluid flowmeter, pressure sensor in motor 12 rotating speeds, each system, analyze row and adopt intensity (being read by velocity sensor 13), coal seam reservoirs internal energy (by gas flowmeter, fluid flowmeter and pressure sensor), row and adopt the situations such as different phase, the combination of different phase coal seam reservoirs row is adopted gas production and gas phase, the infiltrative impact of water.Wherein Main Analysis row adopts gas in the process, current gesture (by air pressure and flow of water impact) to separately infiltrative impact; 3 different phase reservoir gas, supply of groundwater are on its separately infiltrative impact; Final coupling analysis row adopts the impact of production capacity when row is adopted such as intensity, air pressure, the flow of water, reservoir different phase.
Claims (5)
1. coal bed gas peupendicular hole gas production test simulator, it is characterized in that: comprise coal seam reservoirs simulation system, permeability test macro, data display control program and extraction analog control system, coal seam reservoirs simulation system, permeability test macro and extraction analog control system are connected and are connected by pipeline, and coal seam reservoirs simulation system, permeability test macro and extraction analog control system are connected by data wire and are connected with the data display control program.
2. coal bed gas peupendicular hole gas production test simulator according to claim 1, it is characterized in that: described coal seam reservoirs simulation system comprises three parts that structure is identical, each part includes the high-pressure metal cylinder, gas cylinder, the first tank, the first gas compressor, the first tracheae, the first water pipe, the first water injecting pump, the first gas flowmeter, the first liquid flow meter, the first pressure sensor, the one PID valve, the second pressure sensor and the 2nd PID valve, connect by the first tube connector between adjacent two high-pressure metal cylinders, gas cylinder is connected on the first tube connector by the first tracheae, the first water pipe two ends respectively with the first tank be connected tracheae and be connected, the first gas compressor, the first gas flowmeter, the first pressure sensor, the one PID valve is located on the first tracheae in turn along airflow direction, the first water injecting pump, the first liquid flow meter, the second pressure sensor and the 2nd PID valve are located on the first water pipe in turn along water (flow) direction, and the first tube connector is provided with the 3rd pressure sensor and the 3rd PID valve; The first pressure sensor, the second pressure sensor, the 3rd pressure sensor, a PID valve, the 2nd PID valve and the 3rd PID valve are connected with the data display control program respectively by described data wire.
3. coal bed gas peupendicular hole gas production test simulator according to claim 2, it is characterized in that: described permeability test macro comprises gas-liquid separator, the second water injecting pump, the 4th pressure sensor, the second liquid flow meter, the second gas compressor, the 5th pressure sensor, the second gas flowmeter and air and liquid mixer, gas-liquid separator is connected with one of them high-pressure metal cylinder by the second tube connector, the second tube connector is provided with the 6th pressure sensor and the 4th PID valve, the gas outlet of gas-liquid separator is connected by the second tracheae with the import of air and liquid mixer, the liquid outlet of gas-liquid separator is connected with the second tracheae by the second water pipe, the second gas compressor, the 5th pressure sensor, the second gas flowmeter is located on the second tracheae in turn along airflow direction, the second water injecting pump, the 4th pressure sensor, the second liquid flow meter is located on the second water pipe in turn along current; The 4th pressure sensor, the 5th pressure sensor, the 6th pressure sensor and the 4th PID valve are connected with the data display control program respectively by described data wire.
4. coal bed gas peupendicular hole gas production test simulator according to claim 3, it is characterized in that: described extraction analog control system comprises motor, velocity sensor, runner, rotating shaft, cylinder, pull bar, piston, the second tank, air bag, the 3rd gas flowmeter and the 3rd fluid flowmeter, cylinder end and sidepiece are respectively equipped with import and outlet, the import of cylinder is connected with the outlet of air and liquid mixer by the 3rd tube connector, be provided with in turn the 7th pressure sensor along the gas-liquid flow direction on the 3rd tube connector, the 5th PID valve and back-pressure valve, the output shaft of motor is in transmission connection by conveyer belt and runner, velocity sensor is located on the output shaft of motor, rotating shaft is fixedly connected with runner is coaxial, rotating shaft is provided with U-shaped change, one end and the change of pull bar are hinged, the other end of pull bar is connected with piston, piston is slidingly connected in the cylinder, the outlet of cylinder by the 4th tube connector respectively with air bag be connected tank and be connected, the 3rd gas flowmeter is located on the 4th tube connector that closes on air bag, and the 3rd fluid flowmeter is located on the 4th tube connector that closes on the second tank; The 7th pressure sensor, the 5th PID valve and velocity sensor are connected with the data display control program respectively by described data wire.
5. according to claim 1 and 2 or 3 or 4 described coal bed gas peupendicular hole gas production test simulators, it is characterized in that: described data display control program is computer.
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| CN109736787A (en) * | 2018-11-23 | 2019-05-10 | 中联煤层气有限责任公司 | Coal bed gas straight well mining process hydraulic pressure propagation distance analog detection method |
| CN109488284A (en) * | 2018-11-23 | 2019-03-19 | 中海油能源发展股份有限公司 | Coal bed gas straight well mining process hydraulic pressure propagation distance simulating test device |
| CN110082280A (en) * | 2019-06-17 | 2019-08-02 | 河南理工大学 | Coalbed Methane Productivity change modeling test device and method caused by discontinuous mining |
| CN110082280B (en) * | 2019-06-17 | 2024-04-12 | 河南理工大学 | Device and method for simulating and testing coalbed methane productivity change caused by discontinuous drainage |
| CN111396020A (en) * | 2020-02-24 | 2020-07-10 | 中石油煤层气有限责任公司 | Evaluation method for interference between coal-bed gas wells |
| CN112049610A (en) * | 2020-10-21 | 2020-12-08 | 河南理工大学 | Device and method for testing dynamic change of parameters of coal beds during combined drainage and production of coal bed gas well |
| CN112049610B (en) * | 2020-10-21 | 2023-09-08 | 河南理工大学 | Device and method for testing dynamic change of parameters of various coal beds during seam gas well seam production |
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