CN205225230U - Experimental device for solid-liquid-gas migration rule in coal reservoir support fracture - Google Patents
Experimental device for solid-liquid-gas migration rule in coal reservoir support fracture Download PDFInfo
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- CN205225230U CN205225230U CN201520934292.6U CN201520934292U CN205225230U CN 205225230 U CN205225230 U CN 205225230U CN 201520934292 U CN201520934292 U CN 201520934292U CN 205225230 U CN205225230 U CN 205225230U
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- 239000003245 coal Substances 0.000 title claims abstract description 98
- 238000013508 migration Methods 0.000 title claims abstract description 37
- 230000005012 migration Effects 0.000 title claims abstract description 37
- 239000002817 coal dust Substances 0.000 claims abstract description 47
- 238000002347 injection Methods 0.000 claims abstract description 32
- 239000007924 injection Substances 0.000 claims abstract description 32
- 238000011068 loading method Methods 0.000 claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 12
- 229920001971 elastomer Polymers 0.000 claims description 10
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 244000025254 Cannabis sativa Species 0.000 claims description 3
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 claims description 3
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 claims description 3
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- 239000007787 solid Substances 0.000 abstract description 29
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- 238000004088 simulation Methods 0.000 abstract description 16
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- 208000027418 Wounds and injury Diseases 0.000 abstract description 3
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- 239000003795 chemical substances by application Substances 0.000 abstract 2
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 14
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Abstract
The utility model discloses a solid-liquid gas moves law experimental apparatus in coal reservoir supports fracture relates to simulation experiment device. The experimental device comprises a clamp holder main body, a first coal rock plate, a second coal rock plate, an injection pump, a collecting and metering system and a pressure loading device; the clamp holder main body is provided with a cavity; the first coal rock plate and the second coal rock plate are arranged in the cavity, and a space capable of containing coal dust and a propping agent is formed in the cavity in a surrounding manner; the injection hole and the output hole which are communicated with the space are arranged at the two ends of the holder main body, filter screens are arranged in the injection hole and the output hole, and the mesh size of each filter screen is larger than that of the coal powder and smaller than that of the propping agent. The utility model discloses can simulate the migration output condition of solid buggy, liquid water and coal bed gas in the coal bed gas well different row's system of adopting and the overburden pressure condition of supporting the fracture of fracturing, provide the foundation for solving coal bed gas production in-process buggy injury problem and improving single well output.
Description
Technical field
The utility model relates to analogue experiment installation, particularly solid-liquid-gas migration rule experimental facilities in a kind of coal seam reservoirs supporting crack.
Background technology
Coal bed gas is a kind of unconventional gas resource, and coalbed methane reservoir is different from conventional gas reservoir, and it is hidden from being conigenous gas storage, and have hypotonic, low pressure, low saturated feature, coal bed gas well needs could obtain effective exploitation through pressure break.Coal is the fragile medium that a kind of resistance to compression and tensile strength are lower, and modulus of elasticity is little, and poisson's ratio is high, and hardness is low, in coal bed gas well fracturing process, easily produces a large amount of solid coal dust.Solid coal dust enters supporting crack and mixed with proppants, and after pressing crack construction, a large amount of coal dust can be trapped in supporting crack, hole between blocking proppant, and the flow conductivity of injury supporting crack, affects coal bed gas well production capacity.In coal bed gas well mining process, a small amount of coal dust can be migrated with the flowing of fluid media (medium), thus has the output of coal dust.Coal dust output easily causes holddown, buries pump, shortens pump detection period, affects the normal production of coal bed gas well.Solid coal dust problem in coal bed gas extraction process is one of key problem of running into of coal bed gas well, Southern Qinshui Basin and the numerous coal bed gas well mining practice of Eastern Margin of Ordos Basin show, all there is coal dust output phenomenon in coal bed gas well mining each stage, and coal powder size has the rule diminished gradually with the carrying out that mining is produced.First drainage and step-down after coal bed gas well pressure break, gases methane is desorb from coal, through diffuse seepage in the high-speed channel of supporting crack, finally flow to shaft bottom mining to ground, this process relates to migration and the output of liquid water, gases methane and solid coal dust, there is certain coupled relation between solid, liquid and gas, accurately grasp its migration and production rule High-efficient Production to coal bed gas well in supporting crack and there is great directive significance.
At present, some research institutions develop the migration deposition rule physical simulation experiment device of coal dust in coal seam reservoirs crack or pit shaft, if China Patent Publication No. is CN203081424U, it discloses coal dust migration rule visual experimental apparatus in a kind of crack, this device can the change of simulation fracture width, achieve the visual Simulation of solid coal dust migration under seam stream condition, this device cannot simulate the transport conditions of coal dust in crack under overburden pressure condition.China Patent Publication No. is the migration sedimentation experiment device that CN203035186U and CN203117074U individually discloses solid coal dust and liquid water in pit shaft and pipeline, and these experimental facilitiess are mainly used for the migration rule studying solidliquid mixture in pit shaft, pipeline.Now almost not used for the physical simulation experiment device of solid coal dust, liquid water and gases methane Multiphase Flow rule in Study on Coal reservoir fracturing supporting crack.
Utility model content
In order to solve the problem of prior art, the utility model embodiment provides solid-liquid-gas migration rule experimental facilities in a kind of coal seam reservoirs supporting crack, and it can simulate the migration and production situation of solid coal dust, liquid water and coal bed gas in the different mining system of coal bed gas well and overburden pressure condition fracturing supporting crack.Described technical scheme is as follows:
The utility model provides solid-liquid-gas migration rule experimental facilities in a kind of coal seam reservoirs supporting crack, and it comprises:
Clamp body, the first coal petrography plate, the second coal petrography plate, injection pump, collection metering system and pressure loading device;
Clamp body is provided with cavity; First coal petrography plate and the second coal petrography plate are arranged in cavity, and in cavity, surround the space that can hold coal dust and proppant;
Clamp body two ends are provided with injection hole and the output hole of connected space, are equipped with filter screen in injection hole and output hole, and the mesh size of filter screen is greater than the size of coal dust and is less than the size of proppant;
Injection hole is connected with injection pump, and output hole is connected with collection metering system, and pressure loading device is connected with the first coal petrography plate.
Spatial accommodation is provided for coal dust and proppant by clamp body, the first coal petrography plate, the second coal petrography plate, and the environment that axial compression is used for simulating overburden pressure condition fracturing supporting crack is loaded to it, single-phase or heterogeneous space solid coal dust, liquid water and gases methane high pressure being injected accommodation coal dust and proppant is adopted to carry out the migration of solid-liquid-gas in virtual space by injection pump again, and by collecting metering system collection, analyzing data.
In addition, in a kind of coal seam reservoirs supporting crack of providing of the utility model, solid-liquid-gas migration rule experimental facilities also has following additional technical feature.
Further, clamp body is provided with at least one pressure sensor in the position near injection hole, and clamp body is provided with at least one pressure sensor in the position near output hole.
Further, it also comprises first piston and second piston of shutoff cavity, and first piston one end is connected with the first coal petrography plate, and the other end is connected with pressure loading device, and one end of the second piston is connected with the second coal petrography plate.
Further, between first piston and the first coal petrography plate, be equipped with the first steel plate, and
The second steel plate is equipped with between second piston and the second coal petrography plate.
Further, between first piston and the first steel plate, be equipped with the first sealing rubber ring, and
The second sealing rubber ring is equipped with between second piston and the second coal petrography plate.
Further, the edge of first piston and the second piston is equipped with flange, and the flange of the second piston and clamp body are fitted;
Under the loading of pressure loading device, the flange of first piston and clamp body keep spacing, or the flange of first piston and clamp body are fitted.
Further, the first coal petrography plate and the second coal petrography plate are provided with the rope made of hemp for sealing in the junction with clamp body.
Further, injection pump is high pressure displacement pump.
Further, collect metering system and be provided with the metering device be connected with output hole and the solid-liquid-gas separating device be connected with metering device.
The beneficial effect that the technical scheme that the utility model provides is brought is:
1, load axial compression by pressure loading device to coal dust and proppant, can vary in size of axial compression, therefore can well simulate the motion state of gas-liquid and solid in overburden pressure condition lower support crack;
2, by the sieve meshes change in injection hole and output hole, the migration of proppant can be stoped, allow that solid coal dust, liquid and gas pass through, improve the accuracy of experiment;
3, the single-phase or heterogeneous injection of solid coal dust, liquid water and gases methane is realized by high pressure displacement pump, more close to actual coal seam situation, the migration and production situation of solid-liquid-gas in better simulation coal seam reservoirs pressure break rear support crack, provides foundation for solving coal dust injury problem and raising well yield in coal bed gas manufacturing process;
4, by regulating the migration and production rule of solid-liquid-gas in coal seam reservoirs supporting crack under injection pump and the different mining system of pressure loading device simulation coal bed gas well, by solid-liquid-gas migration coupled relation in experiment method research supporting crack, for the management and control of coal bed gas well mining provides foundation.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only 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 front view of solid-liquid-gas migration rule experimental facilities in a kind of coal seam reservoirs supporting crack of providing of the utility model embodiment;
Fig. 2 is the sectional view of solid-liquid-gas migration rule experimental facilities in a kind of coal seam reservoirs supporting crack in Fig. 1;
Fig. 3 is the left view of solid-liquid-gas migration rule experimental facilities in a kind of coal seam reservoirs supporting crack in Fig. 1;
Fig. 4 is the top view of clamp body in Fig. 1.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model embodiment is described in further detail.
Embodiment of the present utility model is described in detail below in conjunction with Fig. 1-Fig. 4.
The utility model is implemented to provide solid-liquid-gas migration rule experimental facilities in a kind of coal seam reservoirs supporting crack, as Figure 1-4, it comprises: clamp body 1, first coal petrography plate 21, second coal petrography plate 22, injection pump 3, collection metering system 4, pressure loading device (not shown), first piston 51, second piston 52, first steel plate 61, second steel plate 62, first sealing rubber ring 71, second sealing rubber ring 72 and pressure sensor 14.
As shown in Figure 4, in the present embodiment, clamp body 1 is provided with cavity 11, clamp body 1 two ends are provided with the injection hole 12 and output hole 13 that are communicated with cavity 11, clamp body 1 is provided with at least one pressure sensor 14 in the position near injection hole 12, and clamp body 1 is provided with at least one pressure sensor 14 in the position near output hole 13.In the present embodiment, particularly, clamp body 1 is provided with a pressure sensor 14 in the position near injection hole 12, and clamp body 1 is provided with a pressure sensor 14 in the position near output hole 13.Two pressure sensors 14 are for the pressure at real time record cavity 11 two ends.
Certainly above about the quantity of pressure sensor 14 and the setting of position, also only illustrate, in the process of practical application, can arrange according to actual needs, the present embodiment is not restricted this.
As shown in Figure 1, in the present embodiment, injection hole 12 is connected with injection pump 3, and output hole 13 is connected with collection metering system 4, and the axial compression P of pressure loading device acts on first piston 51.
As shown in Figure 2, in the present embodiment, first piston 51 and the second piston 52 shutoff are at the two ends of cavity 11, first coal petrography plate 21 and the second coal petrography plate 22, first steel plate 61, second steel plate 62, first sealing rubber ring 71 and the second sealing rubber ring 72 are arranged in cavity 11, and the first coal petrography plate 21 and the second coal petrography plate 22 surround the space that can hold coal dust 81 and proppant 82 in cavity 11; First steel plate 61 is laid between first piston 51 and the first coal petrography plate 21, and second steel plate 62 be laid between the second piston 52 and the second coal petrography plate 22, the first steel plate 61 and the second steel plate 62 are in order to clamp the first coal petrography plate 21, second coal petrography plate 22, coal dust 81 and proppant 82; First sealing rubber ring 71 is laid between first piston 51 and the first steel plate 61, and in order to seal the first steel plate 61, and the second sealing rubber ring 72 is laid between the second piston 52 and the second coal petrography plate 62, in order to seal the second steel plate 62.The pressure loading device axial compression P acted on first piston 51 passes through to transmit layer by layer, finally acts on coal dust 81 and proppant 82.
As shown in figures 1 and 3, the edge of first piston 51 and the second piston 52 is equipped with flange 53, and flange 53 and the clamp body 1 of the second piston 52 are fitted; In addition, pressure loading device axial compression P load under by first piston 51 to pressing down, the flange of first piston 51 and clamp body keep spacing, the state of not fitting, or the flange 53 of first piston 51 can realize fitting with clamp body.
In the present embodiment, the first coal petrography plate 21 and the second coal petrography plate 22 are provided with the rope made of hemp that can reach water-swellable, for the place that is tightly connected in the junction with clamp body 1.
As shown in Figure 2, in the present embodiment, be equipped with filter screen 15, be made up of stainless steel in the injection hole 12 at clamp body 1 two ends and output hole 13, the mesh size of filter screen 15 is greater than the size of coal dust 81 and is less than the size of proppant 82;
It should be noted that, the mesh of filter screen 15 can comprise multiple aperture, experimentally can need the filter screen 15 selecting different pore size, as long as can ensure that filter screen 15 can stop the migration of proppant 82, allow that solid coal dust 81 is by filter screen 15.
In the present embodiment, preferably, injection pump 3 is high pressure displacement pump, and high pressure displacement pump can inject single-phase liquid or gas, also can inject solid-liquid or gas-liquid mixture.Collect metering system 4 and be provided with the metering device be connected with output hole and the solid-liquid-gas separating device be connected with metering device.Metering device can measure the flow of output hole 13 effluent fluid, and solid-liquid-gas separating device can be collected, solid, liquids and gases in separation of the fluid.
The present embodiment by clamp body 1, first coal petrography plate 21, second coal petrography plate 22 for coal dust 81 and proppant 82 provide spatial accommodation, and be used for simulating the environment of overburden pressure condition fracturing supporting crack to its pressurization, adopt single-phase or heterogeneous space solid coal dust, liquid water and gases methane high pressure being injected accommodation coal dust 81 and proppant 82 to carry out the migration of solid-liquid-gas in virtual space by injection pump 3 again, and collect by collecting metering system 4, analyze data.
The utility model embodiment can simulate the migration and production situation of solid coal dust, liquid water and coal bed gas in the different mining system of coal bed gas well and overburden pressure condition fracturing supporting crack, and physical simulation implementation process is as follows:
As shown in Figure 2, by solid coal dust 81 Homogeneous phase mixing of the proppant 82 of certain particle diameter and certain particle diameter, thickness is that the first coal petrography plate 21 of 1cm and the second coal petrography plate 22 are used for simulation fracturing fracture wall, proppant 81 and solid coal dust 81 mix rear filling simulation fracturing fracture, and the amount of proppant 82 and solid coal dust 81 determines simulation fracturing fracture and stitches wide size.
As shown in Figure 2, apply required axial compression P with pressure loading device to first piston 51 and the second piston 52, axial compression P is for simulating overburden pressure, with injection pump 3, ready monophasic fluid or heterogeneous solidliquid mixture are injected in simulation fracturing fracture by injection hole 12 by the flow velocity designed, solid coal dust 81 between proppant 82 hole can along with fluid migration, solid in this process simulation actual support crack, the transport conditions of liquid or gas, pressure sensor 14 is for the pressure at real time record simulation fracture two ends and pressure reduction, fluid can discharge simulation fracturing fracture by output hole 13, major part solid coal dust 81 can be trapped in the gap of proppant 82, fraction solids coal dust 81 can by filter screen 15 by output hole 13 output, the output situation of solid coal dust 81 in this process simulation actual support fracturing fracture, collect metering system 4 and measure the flow of produced fluid, also can collect fluid and the solid coal dust of output, after filtration, dry, weigh and obtain the data such as the quality of output solid coal dust.
After experiment, first piston 51 can be taken out from clamp body 1, push proppant 82 place place aside, take pictures and observe the state of solid coal dust 81 in proppant 82.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (9)
1. a solid-liquid-gas migration rule experimental facilities in coal seam reservoirs supporting crack, is characterized in that, it comprises clamp body, the first coal petrography plate, the second coal petrography plate, injection pump, collection metering system and pressure loading device;
Described clamp body is provided with cavity; Described first coal petrography plate and described second coal petrography plate are arranged in described cavity, and in described cavity, surround the space that can hold coal dust and proppant;
Described clamp body two ends are provided with the injection hole and output hole that are communicated with described space, are equipped with filter screen in described injection hole and described output hole, and the mesh size of described filter screen is greater than the size of described coal dust and is less than the size of described proppant;
Described injection hole is connected with described injection pump, and described output hole is connected with described collection metering system, and described pressure loading device is connected with described first coal petrography plate.
2. solid-liquid-gas migration rule experimental facilities in coal seam reservoirs supporting crack according to claim 1, it is characterized in that, described clamp body is provided with at least one pressure sensor in the position near described injection hole, and described clamp body is provided with at least one pressure sensor in the position near described output hole.
3. solid-liquid-gas migration rule experimental facilities in coal seam reservoirs supporting crack according to claim 2, it is characterized in that, it also comprises first piston and second piston of cavity described in shutoff, described first piston one end is connected with described first coal petrography plate, the other end is connected with described pressure loading device, and one end of described second piston is connected with described second coal petrography plate.
4. solid-liquid-gas migration rule experimental facilities in coal seam reservoirs supporting crack according to claim 3, is characterized in that, is equipped with the first steel plate between described first piston and described first coal petrography plate, and
The second steel plate is equipped with between described second piston and described second coal petrography plate.
5. solid-liquid-gas migration rule experimental facilities in coal seam reservoirs supporting crack according to claim 4, is characterized in that, is equipped with the first sealing rubber ring between described first piston and described first steel plate, and
The second sealing rubber ring is equipped with between described second piston and described second coal petrography plate.
6. solid-liquid-gas migration rule experimental facilities in coal seam reservoirs supporting crack according to claim 5, is characterized in that, the edge of described first piston and described second piston is equipped with flange, and flange and the described clamp body of described second piston are fitted;
Under the loading of described pressure loading device, flange and the described clamp body of described first piston keep spacing, or the flange of described first piston and described clamp body are fitted.
7. solid-liquid-gas migration rule experimental facilities in coal seam reservoirs supporting crack according to claim 6, is characterized in that, described first coal petrography plate and described second coal petrography plate are provided with the rope made of hemp for sealing in the junction with described clamp body.
8. in the coal seam reservoirs supporting crack according to any one of claim 1-7, solid-liquid-gas migration rule experimental facilities, is characterized in that, described injection pump is high pressure displacement pump.
9. solid-liquid-gas migration rule experimental facilities in coal seam reservoirs supporting crack according to claim 8, is characterized in that, described collection metering system is provided with the metering device be connected with output hole and the solid-liquid-gas separating device be connected with described metering device.
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| CN201520934292.6U CN205225230U (en) | 2015-11-20 | 2015-11-20 | Experimental device for solid-liquid-gas migration rule in coal reservoir support fracture |
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| CN201520934292.6U CN205225230U (en) | 2015-11-20 | 2015-11-20 | Experimental device for solid-liquid-gas migration rule in coal reservoir support fracture |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640043A (en) * | 2017-02-08 | 2017-05-10 | 中国地质大学（武汉） | Simulation device for movement state of coal powder under coal seam disturbance |
| CN107727539A (en) * | 2017-09-29 | 2018-02-23 | 中国石油化工股份有限公司 | The experimental provision of pre-crosslinked gel particle migration rule in rock micro throat |
| CN108663498A (en) * | 2017-03-27 | 2018-10-16 | 中国石油化工股份有限公司 | The shale gas site desorption experimental provision and method of high temperature decompression and pressure break |
| CN109611089A (en) * | 2019-01-08 | 2019-04-12 | 中国石油集团川庆钻探工程有限公司 | Device and method for testing damage of pulverized coal precipitation to support crack after coal bed methane well pressure |
| CN110044772A (en) * | 2019-04-13 | 2019-07-23 | 太原理工大学 | A kind of visualization gas liquid two-phase flow coupling experiment device |
| CN110186812A (en) * | 2019-05-09 | 2019-08-30 | 西南石油大学 | The dynamic characteristic test macro and test method of pulverized coal group under a kind of reservoir conditions |
| CN110593866A (en) * | 2019-09-30 | 2019-12-20 | 中国石油集团川庆钻探工程有限公司 | Multi-scale intra-crack gas-liquid two-phase flow simulation and inter-crack interference evaluation testing device |
| CN111157419A (en) * | 2019-11-01 | 2020-05-15 | 成都理工大学 | Device and method for testing crack flow conductivity under triaxial confining pressure condition |
| CN114814175A (en) * | 2021-01-28 | 2022-07-29 | 中国石油天然气股份有限公司 | Three-dimensional simulation experiment device and method for foam oil |
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2015
- 2015-11-20 CN CN201520934292.6U patent/CN205225230U/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640043A (en) * | 2017-02-08 | 2017-05-10 | 中国地质大学（武汉） | Simulation device for movement state of coal powder under coal seam disturbance |
| CN108663498A (en) * | 2017-03-27 | 2018-10-16 | 中国石油化工股份有限公司 | The shale gas site desorption experimental provision and method of high temperature decompression and pressure break |
| CN107727539A (en) * | 2017-09-29 | 2018-02-23 | 中国石油化工股份有限公司 | The experimental provision of pre-crosslinked gel particle migration rule in rock micro throat |
| CN109611089A (en) * | 2019-01-08 | 2019-04-12 | 中国石油集团川庆钻探工程有限公司 | Device and method for testing damage of pulverized coal precipitation to support crack after coal bed methane well pressure |
| CN109611089B (en) * | 2019-01-08 | 2023-08-18 | 中国石油集团川庆钻探工程有限公司 | Method for testing damage of coal dust precipitation to support cracks after coal bed gas well pressure |
| CN110044772A (en) * | 2019-04-13 | 2019-07-23 | 太原理工大学 | A kind of visualization gas liquid two-phase flow coupling experiment device |
| CN110186812A (en) * | 2019-05-09 | 2019-08-30 | 西南石油大学 | The dynamic characteristic test macro and test method of pulverized coal group under a kind of reservoir conditions |
| CN110593866A (en) * | 2019-09-30 | 2019-12-20 | 中国石油集团川庆钻探工程有限公司 | Multi-scale intra-crack gas-liquid two-phase flow simulation and inter-crack interference evaluation testing device |
| CN111157419A (en) * | 2019-11-01 | 2020-05-15 | 成都理工大学 | Device and method for testing crack flow conductivity under triaxial confining pressure condition |
| CN114814175A (en) * | 2021-01-28 | 2022-07-29 | 中国石油天然气股份有限公司 | Three-dimensional simulation experiment device and method for foam oil |
| CN114814175B (en) * | 2021-01-28 | 2024-04-30 | 中国石油天然气股份有限公司 | Foam oil three-dimensional simulation experiment device and method |
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