CN102587889B - Experimental system for simulating solid-phase particles to plug coal (rock) cracks - Google Patents
Experimental system for simulating solid-phase particles to plug coal (rock) cracks Download PDFInfo
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- CN102587889B CN102587889B CN201210029891.4A CN201210029891A CN102587889B CN 102587889 B CN102587889 B CN 102587889B CN 201210029891 A CN201210029891 A CN 201210029891A CN 102587889 B CN102587889 B CN 102587889B
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Abstract
The invention discloses an experimental system for simulating solid-phase particles to plug coal (rock) cracks, wherein an air inlet end of a secondary hole-sealing device of the system is connected with a control valve I, a pressure-regulating valve, a gas flow meter, a control valve II and an air compressor in turn; a discharging end of the secondary hole-sealing device is connected with a control valve III and a crack platform in turn; and the secondary hole-sealing device is located on an electronic scale. The experimental system is simple to operate, collects data scientifically and accurately, and can directly observe movement and plugging condition of the particles in the cracks, well simulate the process that the particles plug the cracks around a drill hole, determine key process parameters of the secondary hole-sealing technology by data of the electronic scale, gas flow meter and pressure-regulating valve in the experimental system for simulating solid-phase particles to plug cracks, and perform analysis and explanation by a movement rule of the solid-phase particles in the cracks and the experimental data, wherein the movement rule is summarized from the experimental phenomenon. The experimental system is suitable for simulating solid-phase particles that plug cracks around the drill hole during the underground gas extraction engineering.
Description
Technical field
The present invention relates to a kind of experimental system simulating particle shutoff crack, be especially a kind ofly applicable to the experimental system simulating particle shutoff borehole circumference crack in underground gas extraction engineering.
Background technology
Chinese patent manual discloses " improving the secondary hole sealing method of coal bed drilling gas drainage under suction concentration " (patent No. 200810023609.5), this patented technology utilizes Geldart-D particle pressure to be delivered in borehole circumference crack by powder particles and blocks leakage path, in the whole nation, more than 10 collieries are applied, have increased substantially down-hole coal bed gas extraction concentration.But because crack, down-hole drilling region is in coal (rock) body inside, is difficult to directly observe the migration of particle in crack, deposition and shutoff process at the scene, is unfavorable for the key process parameter determining secondary hole sealing technology.
Summary of the invention
Technical problem: the object of the invention is the experimental system for simulating that a kind of solid phase particles shutoff coal petrography crack will be provided, this system can be studied more intuitively to the migration of particle in secondary hole sealing process in crack and plugging characteristics, when overcoming with Geldart-D particle pressure, because crack, down-hole drilling region is in coal and rock inside, be difficult to directly observe the migration of particle in crack, deposition and shutoff process at the scene, be unfavorable for the defect of the key process parameter determining secondary hole sealing technology.
Technical scheme: a kind of experimental system simulating solid phase particles shutoff coal petrography crack, this system comprises air compressor and secondary hole sealing device, the inlet end of secondary hole sealing device is connected with I control valve, pressure regulator valve, gas flowmeter, II control valve and air compressor in turn, the discharge end of secondary hole sealing device is connected with III control valve and crack platform in turn, and secondary hole sealing device is placed in above electronic scale.
Crack platform lower is platform base, and rubber gasket is positioned at above platform base, and transparent cover plate is positioned at above rubber gasket, and transparent cover plate is connected with platform base by securing member; Crack platform is provided with bore area and Fractured zone, the platform base upper shed of Fractured zone is rectangular recess, rectangular recess side and be filled with composite material below, main crack and a crack is provided with in rectangular recess, be interconnected by a crack between main crack, platform base is made up of concrete, and bore area is upper shed semi-circular recesses, and gas pressure sensor is equipped with on limit to groove.
Fractured zone has three main cracks and two cracks, and the crack mould forming main crack and a crack is the shaping mould of Curved, or rectilinear shaping mould, or the shaping mould of reducing shape.Composite material is by water: gypsum: cement: sand: calcium carbonate=2:2:1:7:0.5 mixes, and adopts weight ratio.The shaping mould of Curved is placed in the middle of rectangular recess, or rectilinear shaping mould, or the shaping mould of reducing shape, by the crack of difformity and width can be formed to filling composite between crack mould and rectangular recess,
Beneficial effect: the present invention is simple to operate, data acquisition science, accurately, can the directly migration of particle and shutoff situation in eye slit, simulates the process in particle shutoff borehole circumference crack well, is embodied in:
1., by the data of electronic scale, gas flowmeter and pressure regulator valve in the process of this experimental system simulation particle shutoff crack, the key process parameter of secondary hole sealing technology can be determined, to apply this technology better;
2. pass through the conveying of particle in the boring of sightingpiston observable and crack, deposition and shutoff process, also available camera is recorded a video to these experimental phenomenas, phenomenon sums up the migration rule of solid phase particles in crack by experiment, and Binding experiment data give analysis interpretation;
3. crack platform is provided with bore area and Fractured zone, can simulate particle enters borehole circumference crack process through boring, conform to engineering is actual;
4. by can form the dissimilar and Single Fracture of width and the Fracture Networks of complexity to filling composite between rectangular recess and the different cracks mould made.
Accompanying drawing explanation
Fig. 1 is the structural representation of one embodiment of the invention.
Fig. 2 is the crack platform structure schematic diagram in Fig. 1.
Fig. 3 is the A--A generalized section in Fig. 2.
Fig. 4 is the front view of the shaping mould of Curved of the present invention.
Fig. 5 is the top view of the shaping mould of Curved of the present invention.
Fig. 6 is the left view of the shaping mould of Curved of the present invention.
Fig. 7 is the front view of the rectilinear shaping mould of the present invention.
Fig. 8 is the top view of the rectilinear shaping mould of the present invention.
Fig. 9 is the left view of the rectilinear shaping mould of the present invention.
Figure 10 is the front view of the shaping mould of reducing shape of the present invention.
Figure 11 is the top view of the shaping mould of reducing shape of the present invention.
Figure 12 is the left view of the shaping mould of reducing shape of the present invention.
In figure: 1. air compressor, 2. secondary hole sealing device, 3. I control valve, 4. pressure regulator valve, 5. gas flowmeter, 6. II control valve, 7. III control valve, 8. crack platform, 8-1. platform base, 8-2. rubber gasket, 8-3. transparent cover plate, 8-4. securing member, 8-5. bore area, 8-6. Fractured zone, the main crack of 8-7., 8-8. props up crack, 8-9. rectangular recess, 8-10. composite material, 8-11. gas pressure sensor, 9. electronic scale, the 10. shaping mould of Curved, 11. rectilinear shaping moulds, the shaping mould of 12. reducing shapes.
Detailed description of the invention
In FIG, the inlet end of secondary hole sealing device 2 is connected with I control valve 3, pressure regulator valve 4, gas flowmeter 5, II control valve 6 and air compressor 1 in turn; The discharge end of secondary hole sealing device 2 is connected with III control valve 7 and crack platform 8 in turn, and secondary hole sealing device 2 is positioned at above electronic scale 9.
In figs. 2 and 3, crack platform 8 is platform base 8-1 below, and rubber gasket 8-2 is positioned at above platform base 8-1, and transparent cover plate 8-3 is positioned at above rubber gasket 8-2, and transparent cover plate 8-3 is connected with platform base 8-1 by securing member 8-4.Crack platform 8 is provided with bore area 8-5 and Fractured zone 8-6, a main crack 8-7 and crack 8-8 is provided with in the platform base 8-1 of Fractured zone 8-6, be interconnected by a crack 8-8 between main crack 8-7, a main crack 8-7 and crack 8-8 is upper shed rectangular recess 8-9, rectangular recess 8-9 side and be filled with composite material 8-10 below.Platform base 8-1 is made up of concrete, and bore area 8-5 is upper shed semi-circular recesses, groove limit is equipped with gas pressure sensor 8-11.
The shaping mould 10 scribbling the Curved of lubrication oil is placed in the middle of Fractured zone 8-6 rectangular recess 8-9, or rectilinear shaping mould 11, or the shaping mould 12 of reducing shape, composite material 8-10 is fills up to the shaping mould 10 of Curved, or rectilinear shaping mould 11, or around the shaping mould 12 of reducing shape, compacting also ensures that the height of composite material 8-10 upper surface is consistent with rubber gasket 8-2, to ensure sealing effectiveness, after drying 5 ~ 6h, extract the shaping mould 10 of Curved, or rectilinear shaping mould 11, or the shaping mould 12 of reducing shape, thus form main crack 8-7 or a crack 8-8 of difformity and different in width.As a main crack 8-7 or crack 8-8 does not allow particle to enter, useful composition 8-10 blocks; After a main crack 8-7 and crack 8-8 is formed, one deck fluid sealant is smeared at crack platform rectangular recess 8-9 and the outside upper surface uniform of bore area 8-5, transparent cover plate 8-3 is close to rubber gasket 8-2, last fixation fastener 8-4, realizes the sealing to whole crack platform 8.
During use, close I control valve 3, II control valve 6 and III control valve 7, the solid phase particles powder of 15 ~ 20Kg is added in secondary hole sealing device 2, make electronic scale 9 and gas flowmeter 5 reading zero, open air compressor 1 and II control valve 6, regulate pressure regulator valve 4 to make the Stress control of pressure regulator valve 4 at 0.2 ~ 0.3MPa, successively open III control valve 7 and I control valve 3, secondary hole sealing device 2 starts to carry powder.Record the reading of 1 gas flowmeter 5, electronic scale 9 and pressure regulator valve 4 every 5s, when the reading of electronic scale 9 and gas flowmeter 5 no longer changes, close I control valve 3, II control valve 6, III control valve 7 and air compressor 1, experiment terminates.
Claims (3)
1. simulate the experimental system in solid phase particles shutoff coal petrography crack, this system comprises air compressor and secondary hole sealing device, and the inlet end of secondary hole sealing device is connected with I control valve, pressure regulator valve, gas flowmeter, II control valve and air compressor in turn; The discharge end of secondary hole sealing device is connected with III control valve and crack platform in turn, and secondary hole sealing device is positioned at above electronic scale, is characterised in that:
Be platform base below the platform of crack, rubber gasket is positioned at above platform base, and transparent cover plate is positioned at above rubber gasket, and transparent cover plate is connected with platform base by securing member; Crack platform is provided with bore area and Fractured zone, the platform base upper shed of Fractured zone is rectangular recess, rectangular recess side is filled with composite material, main crack and a crack is provided with in rectangular recess, be interconnected by a crack between main crack, platform base is made up of concrete, and bore area is upper shed semi-circular recesses, and gas pressure sensor is equipped with on limit to groove.
2. the experimental system in simulation solid phase particles shutoff coal petrography crack according to claim 1, is characterized in that: composite material is by water: gypsum: cement: sand: calcium carbonate=2:2:1:7:0.5 mixes, and adopts weight ratio.
3. the experimental system in simulation solid phase particles shutoff coal petrography crack according to claim 1, is characterized in that: the crack mould forming main crack and a crack is the shaping mould of Curved, or rectilinear shaping mould, or the shaping mould of reducing shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210029891.4A CN102587889B (en) | 2012-02-10 | 2012-02-10 | Experimental system for simulating solid-phase particles to plug coal (rock) cracks |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210029891.4A CN102587889B (en) | 2012-02-10 | 2012-02-10 | Experimental system for simulating solid-phase particles to plug coal (rock) cracks |
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| CN102587889A CN102587889A (en) | 2012-07-18 |
| CN102587889B true CN102587889B (en) | 2015-04-22 |
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| CN103758483B (en) * | 2014-01-23 | 2016-02-24 | 中国矿业大学 | A kind ofly process the secondary hole sealing method that layer-through drilling takes out rear broken region |
| CN104564048B (en) * | 2015-01-20 | 2017-07-28 | 西南石油大学 | The large scale multiple cracking analogue means and method of a kind of proppant migration |
| CN104792491B (en) * | 2015-03-11 | 2017-09-08 | 西南石油大学 | One kind simulation multi-angle seam net proppant settlement law experimental provision |
| CN105606773B (en) * | 2016-02-19 | 2017-08-01 | 龙岩学院 | A kind of mining sealing material performance testing device and its application method |
| CN108008111A (en) * | 2017-11-06 | 2018-05-08 | 徐州工程学院 | A kind of cement concrete pavement of aerodrome crack simulation experiment platform |
| CN108917815B (en) * | 2018-04-03 | 2020-11-06 | 徐州工程学院 | Pipe body structure for airport pavement crack simulation pipeline |
| CN112710450B (en) * | 2020-12-16 | 2021-12-28 | 中国矿业大学 | Hydraulic pulse blockage removal experiment system and method for fracture blockage caused by particles |
| CN113504163B (en) * | 2021-05-26 | 2022-10-25 | 中国矿业大学 | Experimental system and method for simulating particle deposition behavior in coal mine mining-induced fracture |
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| US3814187A (en) * | 1973-05-14 | 1974-06-04 | Amoco Prod Co | Subsurface formation plugging |
| CN101251030A (en) * | 2008-04-10 | 2008-08-27 | 中国矿业大学 | Secondary hole sealing method capable of improving coal bed drilling firedamp sucking concentration |
| CN101251029A (en) * | 2008-04-10 | 2008-08-27 | 中国矿业大学 | Secondary hole sealing device for firedamp taking-out discharging drilling |
| CN201218811Y (en) * | 2008-06-19 | 2009-04-08 | 中国石油天然气股份有限公司 | Parallel board slit simulation apparatus for acid rock reaction |
| CN101458186A (en) * | 2008-11-03 | 2009-06-17 | 山东大学 | Mold for crack-containing bolting test |
| CA2691769A1 (en) * | 2009-07-31 | 2011-01-31 | Schlumberger Canada Limited | Method and apparatus for multilateral multistage stimulation of a well |
| CN102230394A (en) * | 2011-05-24 | 2011-11-02 | 中国矿业大学 | Secondary hole sealing system for improving coal bed gas extraction concentration |
| CN202092935U (en) * | 2011-06-09 | 2011-12-28 | 青岛石大石仪科技有限责任公司 | Core gripper capable of viewing core cracks |
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2012
- 2012-02-10 CN CN201210029891.4A patent/CN102587889B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3814187A (en) * | 1973-05-14 | 1974-06-04 | Amoco Prod Co | Subsurface formation plugging |
| CN101251030A (en) * | 2008-04-10 | 2008-08-27 | 中国矿业大学 | Secondary hole sealing method capable of improving coal bed drilling firedamp sucking concentration |
| CN101251029A (en) * | 2008-04-10 | 2008-08-27 | 中国矿业大学 | Secondary hole sealing device for firedamp taking-out discharging drilling |
| CN201218811Y (en) * | 2008-06-19 | 2009-04-08 | 中国石油天然气股份有限公司 | Parallel board slit simulation apparatus for acid rock reaction |
| CN101458186A (en) * | 2008-11-03 | 2009-06-17 | 山东大学 | Mold for crack-containing bolting test |
| CA2691769A1 (en) * | 2009-07-31 | 2011-01-31 | Schlumberger Canada Limited | Method and apparatus for multilateral multistage stimulation of a well |
| CN102230394A (en) * | 2011-05-24 | 2011-11-02 | 中国矿业大学 | Secondary hole sealing system for improving coal bed gas extraction concentration |
| CN202092935U (en) * | 2011-06-09 | 2011-12-28 | 青岛石大石仪科技有限责任公司 | Core gripper capable of viewing core cracks |
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