CN204789267U - Coal petrography permeability detection device - Google Patents
Coal petrography permeability detection device Download PDFInfo
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- CN204789267U CN204789267U CN201520549836.7U CN201520549836U CN204789267U CN 204789267 U CN204789267 U CN 204789267U CN 201520549836 U CN201520549836 U CN 201520549836U CN 204789267 U CN204789267 U CN 204789267U
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Abstract
The utility model provides a coal petrography permeability detection device, including gas input unit, the pressurization unit that is used for simulation ground stress state, the acquisition unit who is used for gathering pressure parameter and flow parameter, business turn over air pipe unit with be used for calculating the measuring unit of coal petrography permeability, the pressurization unit is including being used for placing await measuring coal petrography sample and apply pressure's pressure device and the pressure adjustment assembly who is used for carrying on the pressure adjustment to pressure device, pressure device is connected with gas input unit and acquisition unit respectively through business turn over air pipe unit, acquisition unit and measuring unit are connected, the utility model has the advantages of compact structure, easy operation, use are in a flexible way, the volume is less, the cost is lower.
Description
Technical field
The utility model relates to construction of natural gas fields field, particularly relates to a kind of Permeability Oe Coal And Porous Rock And Fractured Rock pick-up unit.
Background technology
China is coal production big country of the world, and the corresponding reserves of coal-seam gas are huge, and reserves and rock gas are substantially the same.Its basis is methane.Rock gas, except being the industrial chemicals of cheapness, also using mainly as fuel, not only as the life fuel of resident, but also is used as the fuel of the transport facilitys such as automobile, boats and ships, aircraft.Because coal-seam gas calorific value is high, products of combustion environmental pollution is few, is considered to high-quality clean fuel.
Along with the oil and natural gas extraction industry development of China in Recent Years is rapid, development and utilization Unconventional forage is the long-range strategic objective of Cheng Liao China, but in the process of exploitation, how to improve coal seam watt extraction rate and utilization factor is be the important and difficult issues of oil and coal industry always, because China's geologic condition is very complicated, certain restriction is received in Unconventional forage exploitation field, and Permeability Oe Coal And Porous Rock And Fractured Rock is the mark of fluid migration complexity in reflection coal petrography, therefore Permeability Oe Coal And Porous Rock And Fractured Rock how is accurately measured for gas utilization, gas drainage system great significance for design.But in currently available technology there is following problem in Permeability Oe Coal And Porous Rock And Fractured Rock measurement: (1) measurement mechanism is without confined pressure and sealing is difficult, difficulty of leaking hunting.(2) test specimen processing request precision high processing difficulties in confined pressure situation is added.(3) ring larger by extraneous shadow temperature in test process.(4) directly logical aeromerric moasurenont error is large for endpiece, and changeable pressure scope is little.(5) triaxiality Coal Under rock mass deep infiltration situation can not be simulated.Therefore need to need badly the Measurement accuracy that a kind of new mode realizes Permeability Oe Coal And Porous Rock And Fractured Rock.
Utility model content
In view of this, the utility model provides a kind of Permeability Oe Coal And Porous Rock And Fractured Rock pick-up unit, to solve the problem.
The Permeability Oe Coal And Porous Rock And Fractured Rock pick-up unit that the utility model provides, comprises gas input block, for the presser unit of simulated ground stress state, for gathering collecting unit, the turnover air pipe unit and the measuring unit for calculating Permeability Oe Coal And Porous Rock And Fractured Rock of pressure parameter and flow parameter;
Described presser unit comprises for placing coal petrography sample to be measured and the pressue device of on-load pressure and for carrying out pressure controlled pressure adjustment assembly to pressue device, described pressue device is connected with gas input block and collecting unit respectively by turnover air pipe unit, and described collecting unit is connected with measuring unit.
Further, described pressue device comprises oil pump, oil cylinder and for the counterforce device as oil cylinder carrier, and described hydraulic jack is fixed on counterforce device, and described oil pump is connected with oil cylinder.
Further, described pressure adjustment assembly comprises outlet pressure regulator, inlet pressure regulator and the pressure controller for controlling outlet and inlet pressure.
Further, described collecting unit comprises pressure acquisition module and flow collection module, and described pressure acquisition module imports and exports gaseous tension for gathering coal petrography sample to be measured.
Further, described flow collection module comprises flowmeter, buret and volumetric flask.
Further, described oil pump is hydraulic oil pump, and described oil cylinder is hydraulic jack.
Further, described pressure acquisition module is pressure transducer.
Further, described gas input block is pressure cylinder.
The beneficial effects of the utility model: the utility model adopts three-dimensional pressue device and closed container structure, simulate three-dimensional ground stress intuitively, by the detection regulating pressure value to carry out Permeability Oe Coal And Porous Rock And Fractured Rock under different three axle terrestrial stress, and different adsorbed state can be measured, different gap air pressure, the permeability variation situation of different temperatures, for gas and the construction of natural gas fields provide technical data support, the utility model has compact conformation, simple to operate, use is flexible, small volume, lower-cost advantage.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further described:
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of counterforce device of the present invention.
Embodiment
Be further described the utility model below in conjunction with drawings and Examples: Fig. 1 is structural representation of the present invention, Fig. 2 is the structural representation of counterforce device of the present invention.
Permeability Oe Coal And Porous Rock And Fractured Rock pick-up unit in the utility model, gas input block 1, for the presser unit of simulated ground stress state, for gathering collecting unit, the turnover air pipe unit and the measuring unit for calculating Permeability Oe Coal And Porous Rock And Fractured Rock of pressure parameter and flow parameter;
Described presser unit comprises pressue device 4 for placing coal petrography sample to be measured on-load pressure and for carrying out pressure controlled pressure adjustment assembly to pressue device, described pressue device 4 is connected with gas input block 1 and collecting unit respectively by turnover air pipe unit, described collecting unit is connected with measuring unit, and pressue device 4 concrete structure as shown in Figure 2.
Pressue device 4 in the present embodiment comprises oil pump, oil cylinder and for the counterforce device as oil cylinder carrier, and described hydraulic jack is fixed on counterforce device, and described oil pump is connected with oil cylinder; Oil cylinder adopts three hydraulic jacks, by being filled with the pressure oil of different pressures, in the process of pressurizeing for coal sample provides the pressure of true triaxial, and then simulated ground stress, pressure adjustment assembly in the present embodiment comprises outlet pressure regulator, inlet pressure regulator 5 and the pressure controller 6 for controlling outlet and inlet pressure, collecting unit comprises pressure acquisition mould, and 2 and flow collection module, described pressure acquisition module imports and exports gaseous tension for gathering coal petrography sample to be measured.Flow collection module comprises flowmeter 7, buret 8 and volumetric flask 9.In the present embodiment, by flowmeter 7 measurement gas flow, because coal sample gas permeation flow is comparatively large with gas pressure change, adopt unit interval gas volume measuring method when flow is less.Specifically comprise: measured once every 5 minutes during beginning, until stability of flow, when reading 3 infiltration gas volumes are equal, carry out gas flow calculating as Gas seepage volume.During reading, first shifting balance device makes liquid level in buret 8 and volumetric flask 9 liang of containers contour, then reads buret liquid level place scale, and reading again after certain hour, the difference of twice reading is this measurement volumes.Pick-up unit provided by the invention can measure different adsorbed state, different gap air pressure, the permeability variation situation of different temperatures, for gas and the construction of natural gas fields provide technical data support.
In the present embodiment, oil pump adopts hydraulic oil pump, described oil cylinder adopts hydraulic jack, gas input block 1 adopts the pressure cylinder that high pressure gas gas is housed, pressure acquisition mould 2 adopts pressure transducer to show in real time and imports and exports gas pressure value, measuring unit in the present embodiment is the HCA High Pressure Absorption device pressure acquisition device of Coal Scientific Research Institute Chongqing Institute's development, directly can read force value, also other devices that can realize above-mentioned functions can be adopted to replace, those skilled in the art can obtain easily, do not repeat them here.
In the present embodiment, by hydraulic jack topping up, promote block and move coal petrography sample pressurization to be measured, and inflated to coal petrography sample to be measured by pressure cylinder.Importing and exporting gaseous tension by obtaining in counterforce device, obtaining true triaxial pressurized equipment moulding pressure and Gas seepage flow simultaneously.Utilize the pressure parameter and flow value that gather, calculate the permeability under this pressure state.
Measuring unit according to gather pressure parameter and flow value, the permeability by following formulae discovery coal petrography sample to be measured:
Wherein, K is the actual measurement permeability of coal, Q
0for gas flow, P
0---atmospheric pressure, P
1for inlet pressure, P
2for top hole pressure, P
mbe three axle confined pressure pressure, F is infiltration useful area, and L is coal body piece lengths, and b is gas Klingberg coefficient.
The utility model imports and exports gaseous tension by obtaining in counterforce device, obtains true triaxial pressurized equipment moulding pressure and Gas seepage flow simultaneously.Utilize the pressure parameter and flow value that gather, calculate the permeability under this pressure state.The method is simple to operate, steady testing cost is low, and processing request is low.
What finally illustrate is, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify to the technical solution of the utility model or equivalent replacement, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of right of the present utility model.
Claims (8)
1. a Permeability Oe Coal And Porous Rock And Fractured Rock pick-up unit, is characterized in that: comprise gas input block, for the presser unit of simulated ground stress state, for gathering collecting unit, the turnover air pipe unit and the measuring unit for calculating Permeability Oe Coal And Porous Rock And Fractured Rock of pressure parameter and flow parameter;
Described presser unit comprises for placing coal petrography sample to be measured and the pressue device of on-load pressure and for carrying out pressure controlled pressure adjustment assembly to pressue device, described pressue device is connected with gas input block and collecting unit respectively by turnover air pipe unit, and described collecting unit is connected with measuring unit.
2. Permeability Oe Coal And Porous Rock And Fractured Rock pick-up unit according to claim 1, is characterized in that: described pressue device comprises oil pump, oil cylinder and for the counterforce device as oil cylinder carrier, and described oil cylinder is fixed on counterforce device, and described oil pump is connected with oil cylinder.
3. Permeability Oe Coal And Porous Rock And Fractured Rock pick-up unit according to claim 1, is characterized in that: described pressure adjustment assembly comprises outlet pressure regulator, inlet pressure regulator and the pressure controller for controlling outlet and inlet pressure.
4. Permeability Oe Coal And Porous Rock And Fractured Rock pick-up unit according to claim 1, is characterized in that: described collecting unit comprises pressure acquisition module and flow collection module, and described pressure acquisition module imports and exports gaseous tension for gathering coal petrography sample to be measured.
5. Permeability Oe Coal And Porous Rock And Fractured Rock pick-up unit according to claim 4, is characterized in that: described flow collection module comprises flowmeter, buret and volumetric flask.
6. Permeability Oe Coal And Porous Rock And Fractured Rock pick-up unit according to claim 2, is characterized in that: described oil pump is hydraulic oil pump, and described oil cylinder is hydraulic jack.
7. Permeability Oe Coal And Porous Rock And Fractured Rock pick-up unit according to claim 4, is characterized in that: described pressure acquisition module is pressure transducer.
8. Permeability Oe Coal And Porous Rock And Fractured Rock pick-up unit according to claim 1, is characterized in that: described gas input block is pressure cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520549836.7U CN204789267U (en) | 2015-07-23 | 2015-07-23 | Coal petrography permeability detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520549836.7U CN204789267U (en) | 2015-07-23 | 2015-07-23 | Coal petrography permeability detection device |
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| Publication Number | Publication Date |
|---|---|
| CN204789267U true CN204789267U (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520549836.7U Expired - Fee Related CN204789267U (en) | 2015-07-23 | 2015-07-23 | Coal petrography permeability detection device |
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| CN (1) | CN204789267U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107437364A (en) * | 2017-08-25 | 2017-12-05 | 刘伟 | A kind of Permeability Oe Coal And Porous Rock And Fractured Rock teaching experimental equipment and method |
| CN113138150A (en) * | 2021-04-27 | 2021-07-20 | 中国平煤神马能源化工集团有限责任公司 | Transient pressure-based low-permeability coal seam in-situ permeability testing method and device |
-
2015
- 2015-07-23 CN CN201520549836.7U patent/CN204789267U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107437364A (en) * | 2017-08-25 | 2017-12-05 | 刘伟 | A kind of Permeability Oe Coal And Porous Rock And Fractured Rock teaching experimental equipment and method |
| CN113138150A (en) * | 2021-04-27 | 2021-07-20 | 中国平煤神马能源化工集团有限责任公司 | Transient pressure-based low-permeability coal seam in-situ permeability testing method and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 Termination date: 20180723 |
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| CF01 | Termination of patent right due to non-payment of annual fee |