CN203130061U - Device for stimulating test of improving coal bed methane recovery efficiency by feeding carbon dioxide - Google Patents
Device for stimulating test of improving coal bed methane recovery efficiency by feeding carbon dioxide Download PDFInfo
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- CN203130061U CN203130061U CN 201320110560 CN201320110560U CN203130061U CN 203130061 U CN203130061 U CN 203130061U CN 201320110560 CN201320110560 CN 201320110560 CN 201320110560 U CN201320110560 U CN 201320110560U CN 203130061 U CN203130061 U CN 203130061U
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Abstract
The utility model discloses a device for stimulating a test of improving coal bed methane recovery efficiency by feeding carbon dioxide. The device comprises a coal bed stimulating system used for stimulating pressure and temperature conditions of a coal bed, a gas feeding system used for feeding methane or helium into the coal bed stimulating system, a fracture stimulating carbon dioxide feeding system used for feeding high-pressure liquid to the coal bed stimulating system to enable the coal bed stimulating system to stimulate fracture development degree and feeding carbon dioxide to the coal bed stimulating system, a carbon dioxide absorbing device used for absorbing the carbon dioxide exhausted by the coal bed stimulating system, and a data collection control system used for collecting data and performing process control. The device for stimulating the test of improving the coal bed methane recovery efficiency by feeding the carbon dioxide can stimulate real conditions of the coal bed, stimulate on-site fracturing and CO2 pumping processes and stimulate feeding of CO2 in different amount according to coal bodies of different development degrees and different coal bed conditions to improve coal bed recovery efficiency, and obtain optimal CO2 feeding amount according to specific coal beds.
Description
Technical field
The utility model relates to the coal-bed gas exploitation technical field, relates in particular to a kind of test simulator that is used for improving coal bed methane employing rate.
Background technology
Coal bed gas has been subjected to people and has paid close attention to widely as a kind of novel, clear energy sources.Coal bed gas mainly is stored in the coal seam, and the hypotonic characteristics of China's coal seam reservoirs have determined the exploitation coal bed gas need carry out anti-reflection transformation, and fracturing is one of main mode of present coal seam reservoirs transformation.Increasing along with the coal seam buried depth, only depending on the fracturing technology to improve the coal bed gas well capacity has too many difficulties to cope with, in temperature, the situation that pressure is identical, coal will be far longer than adsorption capacity to methane to the adsorption capacity of carbon dioxide, therefore, people begin to attempt improving by carbon dioxide injection gas or liquid the recovery ratio of coal bed methane, some tests have also been carried out at the scene, but coal seam reservoirs pressure, the reservoir fracture development degree, the otherness of geological tectonic conditions etc., caused the technology of present on-the-spot carbon dioxide injection all to be in the stage of fumbling, and is which type of reservoir carbon dioxide injection effective? is which type of reservoir carbon dioxide injection invalid? can which type of reservoir carbon dioxide injection improve recovery ratio better? can improve how many recovery ratios? annotate how many carbon dioxide and obtain the highest recovery ratio? for these problems, rely on the state of the art can not give the comparison objective appraisal.The blindness of engineering has caused the increase of investment risk on the one hand, makes the quality that people can't this kind of objective appraisal technology on the other hand.The field, the on-the-spot popularization all have been subjected to considerable restraint.
In order to answer the otherness of the development technology that on-the-spot because reservoir pressure, coal seam adsorption capacity, cranny development degree etc. cause better, be which type of infusion parameter which type of reservoir adopts to improve the recovery ratio of coal bed methane better, need a kind of device energy simulant bearing conditions of coal seam and infusion technology badly, carbon dioxide injection under the different situations being improved the recovery ratio of methane tests, in order to answer these problems, thereby reduce the blindness of engineering, for infusion carbon dioxide under the on-the-spot different reservoir condition provides theoretical foundation.
Summary of the invention
The purpose of this utility model is to provide a kind of carbon dioxide injection to improve the test simulator of coal bed methane recovery rate.
For achieving the above object, the test simulator of carbon dioxide injection raising coal bed methane recovery rate of the present utility model comprises following system and device: the coal seam reservoirs simulation system that is used for simulation coal seam reservoirs pressure and temperature situation; Be used for injecting to the coal seam reservoirs simulation system by the gas main gas injection system of methane gas or helium gas; Be used for injecting highly pressurised liquid, making coal seam reservoirs simulation system simulation cranny development degree to the coal seam reservoirs simulation system by the pressure break pipeline, and simulate the carbon dioxide injection system to the pressure break of coal seam reservoirs simulation system injecting carbon dioxide; For the absorption unit of dioxide carbon of the carbon dioxide that absorbs the discharge of coal seam reservoirs simulation system by the gas main and the data acquisition control system that is used for image data and carries out process control.
Described coal seam reservoirs simulation system comprises coal sampling mill in order to the splendid attire coal sample, in order to the volumetric standard chamber of buffering and stored-gas, stabilizing hydraulic pressure machine, usefulness in order to confined pressure to be provided to coal sample so that the temperature controller of coal sampling mill and volumetric standard chamber maintenance constant temperature, and be used for coal sampling mill and volumetric standard chamber are vacuumized the vacuum pump of usefulness, be provided with between coal sampling mill and the volumetric standard chamber and be connected valve, the stabilizing hydraulic pressure machine is connected with coal sampling mill by fluid pressure line; Top, described volumetric standard chamber is connected with the volumetric standard pipeline, and the volumetric standard pipeline is provided with volumetric standard pressure sensor and volumetric standard valve; Described coal sampling mill top is connected with pressure break pipeline and coal sampling mill pipeline, and the coal sampling mill pipeline is provided with coal sampling mill pressure sensor and coal sampling mill gas injection valve, and the coal sampling mill pipeline at coal sampling mill gas injection valve place is provided with the flow sensing meter; Described gas injection system comprises methane gas cylinder, helium gas cylinder and first air compressor; The methane gas cylinder is connected with the methane escape pipe, and the methane escape pipe is provided with the methane valve of giving vent to anger; The helium gas cylinder is connected with the helium escape pipe, and the helium escape pipe is provided with the helium valve of giving vent to anger; Described pressure break is simulated the carbon dioxide injection system and is comprised CO 2 high pressure gas cylinder, pressure break water tank, second air compressor and booster, described CO 2 high pressure gas cylinder, pressure break water tank and second air compressor all are connected with described booster, and described booster is connected with described pressure break pipeline; The pressure break pipeline at described supercharger outlet place is provided with the supercharger outlet valve, and the pressure break pipeline of described coal sampling mill import department is provided with coal sampling mill pressure break valve; Fill aqua calcis in the described absorption unit of dioxide carbon, the absorption unit of dioxide carbon top is communicated with evacuated tube, and evacuated tube is provided with drying tube, emptying valve and emptying pressure sensor; The evacuated tube at emptying valve place is provided with the flow sensing meter; Be provided with described gas main between described gas injection system, coal seam reservoirs simulation system and the absorption unit of dioxide carbon; The escape pipe of described methane escape pipe, helium escape pipe, first air compressor, volumetric standard pipeline and coal sampling mill pipeline all are connected with described gas main; In the aqua calcis in described gas main's the end feeding absorption unit of dioxide carbon; Gas in the gas main flows after by forward direction, the gas main at described volumetric standard pipeline rear is provided with first and absorbs valve, gas main before the absorption unit of dioxide carbon is provided with second and absorbs valve, and second gas main who absorbs before the valve is provided with gas chromatograph; Described vacuum pump is connected with gas main before the coal seam reservoirs simulation system by vacuum-pumping pipeline; Vacuum-pumping pipeline is provided with the vacuum pump valve; Data acquisition control system comprises electric control gear, and described booster, volumetric standard valve, coal sampling mill gas injection valve, volumetric standard pressure sensor, coal sampling mill pressure sensor, gas chromatograph, emptying pressure sensor and described each flow sensing meter all are connected with electric control gear.
Described stabilizing hydraulic pressure machine is connected with coal sampling mill by three fluid pressure lines, is respectively the middle fluid pressure line that is communicated with the coal sampling mill bottom and two sidepiece fluid pressure lines that are communicated with the coal sampling mill sidepiece.
Described absorption unit of dioxide carbon comprises two closed containers that fill aqua calcis, gas main's end feeds in the aqua calcis in first closed container, the top of first closed container is communicated with the series connection gas circuit, the series connection gas circuit feeds in the interior aqua calcis of second closed container, and described evacuated tube is connected the top of second closed container.
Described servo supercharging pump delivery is 0.2-10cm
3/ min.
Described coal sampling mill and volumetric standard chamber all are arranged on the fixed support.
Described coal sampling mill is connected with the release pipeline, and the release pipeline is provided with pressure relief valve, and pressure relief valve outlet below is provided with the water receiving case.
Described booster adopts the servo booster of MTS with cyclelog.
The utility model can be simulated the coal seam reservoirs full-scale condition, simulated field pressure break and infusion CO
2Process at different cranny development degree coal bodies and different coal seam reservoirs conditions, draws optimum infusion parameter.The utility model can be by changing the CO that injects in the coal body
2Amount, different CO are injected in simulation
2Raising coal bed gas recovery ratio effect under the amount situation draws the optimum CO of notes at the particular coal reservoir
2Amount.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the enlarged drawing at A place among Fig. 1;
Fig. 3 is the enlarged drawing at B place among Fig. 1;
Fig. 4 is the enlarged drawing at C place among Fig. 1;
Fig. 5 is the enlarged drawing at D place among Fig. 1.
The specific embodiment
Thick lines are depicted as fluid circuit among Fig. 1 to Fig. 5, and the hachure that links to each other with computer is depicted as signal (control) circuit.
To shown in Figure 5, the test simulator that carbon dioxide injection of the present utility model improves the coal bed methane recovery rate comprises following system and device as Fig. 1:
The coal seam reservoirs simulation system that is used for simulation coal seam reservoirs pressure and temperature situation;
Be used for injecting to the coal seam reservoirs simulation system by gas main 49 gas injection system of methane gas or helium gas;
Be used for injecting highly pressurised liquid, making coal seam reservoirs simulation system simulation cranny development degree to the coal seam reservoirs simulation system by pressure break pipeline 43, and simulate the carbon dioxide injection system to the pressure break of coal seam reservoirs simulation system injecting carbon dioxide;
For the absorption unit of dioxide carbon of the carbon dioxide that absorbs the discharge of coal seam reservoirs simulation systems by gas main 49 and the data acquisition control system that is used for image data and carries out process control.
As Fig. 1, Fig. 3 and shown in Figure 5, described coal seam reservoirs simulation system comprises coal sampling mill 23 in order to the splendid attire coal sample, in order to the volumetric standard chamber 20 of buffering and stored-gas, in order to stabilizing hydraulic pressure machine 22 that confined pressure is provided to coal sample, with so that coal sampling mill 23 and volumetric standard chamber 20 keep the temperature controller 21 of constant temperature, and be used for coal sampling mill 23 and volumetric standard chamber 20 are vacuumized the vacuum pump 26 of usefulness, be provided with between coal sampling mill 23 and the volumetric standard chamber 20 and be connected valve 34, stabilizing hydraulic pressure machine 22 is connected with coal sampling mill 23 by fluid pressure line.
20 tops, described volumetric standard chamber are connected with volumetric standard pipeline 44, and volumetric standard pipeline 44 is provided with volumetric standard pressure sensor 16 and volumetric standard valve 14; Described coal sampling mill 23 tops are connected with pressure break pipeline 43 and coal sampling mill pipeline 45, coal sampling mill pipeline 45 is provided with coal sampling mill pressure sensor 17 and coal sampling mill gas injection valve 15, the coal sampling mill pipeline 45 at coal sampling mill gas injection valve 15 places is provided with the flow sensing meter, flow sensing is counted prior art, and figure does not show.
As depicted in figs. 1 and 2, described gas injection system comprises methane gas cylinder 1, helium gas cylinder 2 and first air compressor 5; Methane gas cylinder 1 top is connected with methane escape pipe 46, and methane escape pipe 46 is provided with the methane valve 3 of giving vent to anger; Helium gas cylinder 2 tops are connected with helium escape pipe 47, and helium escape pipe 47 is provided with the helium valve 4 of giving vent to anger.
As depicted in figs. 1 and 2, described pressure break is simulated the carbon dioxide injection system and is comprised CO 2 high pressure gas cylinder 6, pressure break water tank 8, second air compressor 9 and booster 10, described CO 2 high pressure gas cylinder 6, pressure break water tank 8 and second air compressor 9 all are connected with described booster 10, and described booster 10 is connected with described pressure break pipeline 43; The pressure break pipeline 43 in described booster 10 exits is provided with supercharger outlet valve 11, and the pressure break pipeline 43 of described coal sampling mill 23 import departments is provided with coal sampling mill pressure break valve 12;
As shown in Figure 1 and Figure 4, fill Ca(OH in the described absorption unit of dioxide carbon)
2(calcium hydroxide) solution, the absorption unit of dioxide carbon top is communicated with evacuated tube 48, and evacuated tube 48 is provided with drying tube 30, emptying valve 31 and emptying pressure sensor 32; The evacuated tube 48 at emptying valve 31 places is provided with the flow sensing meter, and flow sensing is counted prior art, and figure does not show.
To shown in Figure 5, be provided with gas main 49 between described gas injection system, coal seam reservoirs simulation system and the absorption unit of dioxide carbon as Fig. 1; The escape pipe of described methane escape pipe 46, helium escape pipe 47, first air compressor 5, volumetric standard pipeline 44 and coal sampling mill pipeline 45 all are connected with described gas main 49; In the aqua calcis in described gas main's 49 the end feeding absorption unit of dioxide carbon; Gas in the gas main 49 flows after by forward direction, the gas main 49 at described volumetric standard pipeline 44 rears is provided with first and absorbs valve 13, the gas mains 49 that gas main 49 before the absorption unit of dioxide carbon is provided with before the second absorption valve, 28, the second absorption valves 28 are provided with gas chromatograph 27; Described vacuum pump 26 is connected with gas main 49 before the coal seam reservoirs simulation system by vacuum-pumping pipeline 50; Vacuum-pumping pipeline 50 is provided with vacuum pump valve 25.
As shown in Figure 1 and Figure 4, data acquisition control system comprises that electric control gear 33(electric control gear 33 preferably adopts computer, also can adopt other forms of electric control gears such as single-chip microcomputer, PLC), described booster 10, volumetric standard valve 14, coal sampling mill gas injection valve 15, volumetric standard pressure sensor 16, coal sampling mill pressure sensor 17, gas chromatograph 27, emptying pressure sensor 32 and described each flow sensing meter all are connected with electric control gear 33.
As shown in figures 1 and 3, described stabilizing hydraulic pressure machine 22 is connected with coal sampling mill 23 by three fluid pressure lines, is respectively the middle fluid pressure line 41 that is communicated with coal sampling mill 23 bottoms and two sidepiece fluid pressure lines 42 that are communicated with coal sampling mill 23 sidepieces.Fluid pressure line 41 provides longitudinal pressure as coal sampling mill 23 in the middle of when using, and sidepiece fluid pressure line 42 provides pressure all around for coal sampling mill 23.
As shown in Figure 1 and Figure 4, described absorption unit of dioxide carbon comprises two closed containers that fill aqua calcis, gas main 49 end feeds in the aqua calcis among the first closed container 29A, the top of the first closed container 29A is communicated with series connection gas circuit 51, in the aqua calcis that series connection gas circuit 51 feeds in the second closed container 29B, described evacuated tube 48 is connected the top of the second closed container 29B.
As shown in figures 1 and 3, described coal sampling mill 23 and volumetric standard chamber 20 all are arranged on the fixed support 24.Described coal sampling mill 23 is connected with release pipeline 52, and release pipeline 52 is provided with pressure relief valve 18, and pressure relief valve 18 outlet belows are provided with water receiving case 19.
Wherein, described servo supercharging pump delivery is 0.2-10cm
3/ min, described booster 10 adopts the servo booster of MTS with cyclelog.
Utilize the utility model experimentize the test step as follows:
(1) first step is airtight test
Connect each device and pipeline according to Fig. 1 to Fig. 5, in the test simulator of carbon dioxide injection raising coal bed methane recovery rate of the present utility model, inject a small amount of gas and carry out pressure test, the tightness of each device in the check system.
(2) second steps are to annotate CH
4The test of gas air content
1. the processing and fabricating length is respectively 300mm * 200mm * 200mm coal sample on rock drill, and weighing coal sample quality, and coal sample is put in the coal sampling mill 23.
2. regulate temperature controller 21, set coal seam reservoirs simulation system temperature, make it suitable with the coal seam reservoirs temperature, regulate stabilizing hydraulic pressure machine 22, set coal sample top pressure and pressure all around, to simulate the suffered confined pressure of coal seam reservoirs.
3. open helium give vent to anger valve 4 and volumetric standard valve 14, make first to absorb valve 13 maintenance closed conditions, in the coal seam reservoirs simulation system, inject helium, this experimental design maximum pressure of the pressure ratio of injecting gas (being this pressure of testing the coal seam reservoirs that will simulate) is big by 20%, close helium give vent to anger valve 4 and volumetric standard valve 14, check the tightness of coal seam reservoirs simulation system.
4. open volumetric standard valve 14 and vacuum pump valve 25, with vacuum pump 26 coal sampling mill 23 was vacuumized 3 hours, close volumetric standard valve 14 and vacuum pump valve 25 then.
5. open the methane valve 3 of giving vent to anger, volumetric standard valve 14 injects methane (CH to the volumetric standard chamber in 20
4) gas, up to reaching about setup pressure value (i.e. the pressure of the coal seam reservoirs of simulating), close methane gas cylinder 1; After the balance upon adsorption, close and be connected valve 34 between coal sampling mill 23 and the volumetric standard chamber 20, setting program, computer acquisition system are gathered the adsorption equilibrium pressure p automatically
1Numerical value.
6. according to system balancing pressure, combined standard vessel 20 volumes, coal sample quality draw the adsorbance after the adsorption equilibrium, draw the isothermal adsorption curve.
(3) pressure break and carbon dioxide injection process
1. behind the coal sample loading coal specimen chamber 23, namely annotate CH according to above-mentioned second step
4Method in the test of gas air content is simulated the coal seam reservoirs pressure and temperature again, and its temperature and pressure is set.
2. open supercharger outlet valve 11 and coal sampling mill pressure break valve 12, inject liquid (water), the pressure P of computer acquisition device real time record fracturing process according to infusion program and the discharge capacity of design in advance to the coal seam reservoirs simulation system by the servo booster 10 of MTS
2With parameters such as discharge capacities.
3. in injection process, too high in order to prevent injection pressure, liquid flows nowhere, can open pressure relief valve 18 according to flow and pressure condition, makes liquid flow out to water receiving case 19.
4. namely annotate CH according to above-mentioned second step
4Method in the test of gas air content is simulated the coal seam reservoirs pressure and temperature again, and its temperature and pressure is set, vessel 20 pressure that set up standard, and the pressure in making coal sampling mill 23 pressure and air content being tested equates.
5. open CO 2 high pressure gas cylinder 6 valves 7, supercharger outlet valve 11 and coal sampling mill pressure break valve 12, by the servo booster 10 of MTS to coal seam reservoirs system injecting carbon dioxide gas, and real time record carbon dioxide injection rate, the pressure up to coal sampling mill 23 places reaches preset value P
2
(4) carbon dioxide improves the recovery ratio test
1. by the computer data acquiring control system, pressure after 23 step-downs of setting coal sampling mill is closed coal sampling mill pressure break valve 12, opens first and absorbs valve 13, coal sampling mill gas injection valve 15, second absorption valve 28 and the emptying valve 31, reservoir pressure reduces, the mist desorb.After coal sampling mill pressure sensor 17 readings reach setting pressure, closing first absorbs valve 13 and coal sampling mill gas injection valve 15(first and absorbs valve 13 and coal sampling mill gas injection valve 15 and preferably adopt electromagnetic valve and link to each other with computer as electric control gear 33, in order to realize control automatically), the equilibrium pressure after the mist desorb of coal sampling mill pressure sensor 17 measurements is recorded as P
3, the relative concentration of mist carbon dioxide and methane, the CH that the flow sensing meter record at emptying valve 31 places is discharged are discharged in gas chromatograph 27 test desorbs
4Gas flow V
2, by emptying pressure sensor 32 monitoring emptying pressure.
2. Data Processing in Experiment:
Reach the adsorption equilibrium pressure P
1Computer-chronograph acquisition system test adsorbance is V
1, after the mist that step-down is discharged behind the carbon dioxide injection is removed carbon dioxide through processing, residue CH
4Gas flow V
2Gas flow for extraction.Be depressured to P3 behind the carbon dioxide injection.Coal bed gas recovery ratio=V
2/ V
1* 100%.
For the coal seam reservoirs of similarity condition, in the simulated test of homogeneous not, P
2Can adopt different numerical value such as 10MPa, under definite particular coal reservoir conditions, the relation of the amount of injecting carbon dioxide and coal seam recovery ratio, thus instruct engineering practice, the loss of avoiding engineering blindness to bring.Obtain the carbon dioxide infusion parameter of the best by the utility model after, just can use in the middle of the actual coal seam reservoirs, obtain optimum methane recovery ratio by injecting an amount of carbon dioxide that is obtained by the utility model to coal seam reservoirs.
Claims (8)
1. carbon dioxide injection improves the test simulator of coal bed methane recovery rate, it is characterized in that: comprise following system and device:
The coal seam reservoirs simulation system that is used for simulation coal seam reservoirs pressure and temperature situation;
Be used for injecting to the coal seam reservoirs simulation system by gas main (49) gas injection system of methane gas or helium gas;
Be used for injecting highly pressurised liquid, making coal seam reservoirs simulation system simulation cranny development degree to the coal seam reservoirs simulation system by pressure break pipeline (43), and simulate the carbon dioxide injection system to the pressure break of coal seam reservoirs simulation system injecting carbon dioxide;
For the absorption unit of dioxide carbon of the carbon dioxide that absorbs the discharge of coal seam reservoirs simulation system by gas main (49) and the data acquisition control system that is used for image data and carries out process control.
2. carbon dioxide injection according to claim 1 improves the test simulator of coal bed methane recovery rate, it is characterized in that:
Described coal seam reservoirs simulation system comprises the coal sampling mill (23) in order to the splendid attire coal sample, volumetric standard chamber (20) in order to buffering and stored-gas, in order to the stabilizing hydraulic pressure machine (22) of confined pressure to be provided to coal sample, with so that coal sampling mill (23) and volumetric standard chamber (20) keep the temperature controller (21) of constant temperature, and be used for coal sampling mill (23) and volumetric standard chamber (20) are vacuumized the vacuum pump (26) of usefulness, be provided with between coal sampling mill (23) and volumetric standard chamber (20) and be connected valve (34), stabilizing hydraulic pressure machine (22) is connected with coal sampling mill (23) by fluid pressure line;
Top, described volumetric standard chamber (20) is connected with volumetric standard pipeline (44), and volumetric standard pipeline (44) is provided with volumetric standard pressure sensor (16) and volumetric standard valve (14);
Described coal sampling mill (23) top is connected with pressure break pipeline (43) and coal sampling mill pipeline (45), coal sampling mill pipeline (45) is provided with coal sampling mill pressure sensor (17) and coal sampling mill gas injection valve (15), and the coal sampling mill pipeline (45) that coal sampling mill gas injection valve (15) is located is provided with the flow sensing meter;
Described gas injection system comprises methane gas cylinder (1), helium gas cylinder (2) and first air compressor (5); Methane gas cylinder (1) is connected with methane escape pipe (46), and methane escape pipe (46) is provided with the methane valve (3) of giving vent to anger; Helium gas cylinder (2) is connected with helium escape pipe (47), and helium escape pipe (47) is provided with the helium valve (4) of giving vent to anger;
Described pressure break is simulated the carbon dioxide injection system and is comprised CO 2 high pressure gas cylinder (6), pressure break water tank (8), second air compressor (9) and booster (10), described CO 2 high pressure gas cylinder (6), pressure break water tank (8) and second air compressor (9) all are connected with described booster (10), and described booster (10) is connected with described pressure break pipeline (43); The pressure break pipeline (43) in described booster (10) exit is provided with supercharger outlet valve (11), and the pressure break pipeline (43) of described coal sampling mill (23) import department is provided with coal sampling mill pressure break valve (12);
Fill aqua calcis in the described absorption unit of dioxide carbon, the absorption unit of dioxide carbon top is communicated with evacuated tube (48), and evacuated tube (48) is provided with drying tube (30), emptying valve (31) and emptying pressure sensor (32); The evacuated tube (48) that emptying valve (31) is located is provided with the flow sensing meter;
Be provided with described gas main (49) between described gas injection system, coal seam reservoirs simulation system and the absorption unit of dioxide carbon; The escape pipe of described methane escape pipe (46), helium escape pipe (47), first air compressor (5), volumetric standard pipeline (44) and coal sampling mill pipeline (45) all are connected with described gas main (49); In the aqua calcis in described gas main's (49) the end feeding absorption unit of dioxide carbon; Gas in the gas main (49) flows after by forward direction, the gas main (49) at described volumetric standard pipeline (44) rear is provided with first and absorbs valve (13), gas main (49) before the absorption unit of dioxide carbon is provided with second and absorbs valve (28), and second absorbs the preceding gas main (49) of valve (28) is provided with gas chromatograph (27); Described vacuum pump (26) is connected by the preceding gas main (49) of vacuum-pumping pipeline (50) and coal seam reservoirs simulation system; Vacuum-pumping pipeline (50) is provided with vacuum pump valve (25);
Data acquisition control system comprises electric control gear (33), and described booster (10), volumetric standard valve (14), coal sampling mill gas injection valve (15), volumetric standard pressure sensor (16), coal sampling mill pressure sensor (17), gas chromatograph (27), emptying pressure sensor (32) and described each flow sensing meter all are connected with electric control gear (33).
3. carbon dioxide injection according to claim 2 improves the test simulator of coal bed methane recovery rate, it is characterized in that: described stabilizing hydraulic pressure machine (22) is connected with coal sampling mill (23) by three fluid pressure lines, is respectively the middle fluid pressure line (41) that is communicated with coal sampling mill (23) bottom and the two sidepiece fluid pressure lines (42) that are communicated with coal sampling mill (23) sidepiece.
4. carbon dioxide injection according to claim 3 improves the test simulator of coal bed methane recovery rate, it is characterized in that: described absorption unit of dioxide carbon comprises two closed containers that fill aqua calcis, gas main's (49) end feeds in the aqua calcis in first closed container (29A), the top of first closed container (29A) is communicated with series connection gas circuit (51), series connection gas circuit (51) feeds in the interior aqua calcis of second closed container (29B), and described evacuated tube (48) is connected the top of second closed container (29B).
5. carbon dioxide injection according to claim 4 improves the test simulator of coal bed methane recovery rate, and it is characterized in that: described servo supercharging pump delivery is 0.2-10cm
3/ min.
6. carbon dioxide injection according to claim 5 improves the test simulator of coal bed methane recovery rate, and it is characterized in that: described coal sampling mill (23) and volumetric standard chamber (20) all are arranged on the fixed support (24).
7. carbon dioxide injection according to claim 6 improves the test simulator of coal bed methane recovery rate, it is characterized in that: described coal sampling mill (23) is connected with release pipeline (52), release pipeline (52) is provided with pressure relief valve (18), and pressure relief valve (18) outlet below is provided with water receiving case (19).
8. improve the test simulator of coal bed methane recovery rate according to each described carbon dioxide injection among the claim 2-7, it is characterized in that: described booster (10) adopts the servo booster of MTS with cyclelog.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320110560 CN203130061U (en) | 2013-03-11 | 2013-03-11 | Device for stimulating test of improving coal bed methane recovery efficiency by feeding carbon dioxide |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320110560 CN203130061U (en) | 2013-03-11 | 2013-03-11 | Device for stimulating test of improving coal bed methane recovery efficiency by feeding carbon dioxide |
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| Publication Number | Publication Date |
|---|---|
| CN203130061U true CN203130061U (en) | 2013-08-14 |
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ID=48938052
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103132971A (en) * | 2013-03-11 | 2013-06-05 | 河南理工大学 | Test simulating device for improving recovery rate of coal bed methane by injecting carbon dioxide |
| CN113959896A (en) * | 2021-10-22 | 2022-01-21 | 中国石油大学(北京) | Method and device for simulating carbon dioxide to replace methane in coal bed |
| CN115596435A (en) * | 2022-11-10 | 2023-01-13 | 山西工程技术学院（Cn） | Carbon dioxide distribution monitoring simulation method in process of displacing methane with carbon dioxide |
-
2013
- 2013-03-11 CN CN 201320110560 patent/CN203130061U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103132971A (en) * | 2013-03-11 | 2013-06-05 | 河南理工大学 | Test simulating device for improving recovery rate of coal bed methane by injecting carbon dioxide |
| CN103132971B (en) * | 2013-03-11 | 2015-08-12 | 河南理工大学 | Carbon dioxide injection improves the test simulator of coal bed methane recovery rate |
| CN113959896A (en) * | 2021-10-22 | 2022-01-21 | 中国石油大学(北京) | Method and device for simulating carbon dioxide to replace methane in coal bed |
| CN115596435A (en) * | 2022-11-10 | 2023-01-13 | 山西工程技术学院（Cn） | Carbon dioxide distribution monitoring simulation method in process of displacing methane with carbon dioxide |
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