CN109459371A - A kind of rock material measuring gas permebility device and its test method - Google Patents
A kind of rock material measuring gas permebility device and its test method Download PDFInfo
- Publication number
- CN109459371A CN109459371A CN201811588511.4A CN201811588511A CN109459371A CN 109459371 A CN109459371 A CN 109459371A CN 201811588511 A CN201811588511 A CN 201811588511A CN 109459371 A CN109459371 A CN 109459371A
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- seal plug
- measuring gas
- material measuring
- rubber seal
- rock material
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- 239000011435 rock Substances 0.000 title claims abstract description 46
- 239000000463 material Substances 0.000 title claims abstract description 29
- 238000010998 test method Methods 0.000 title claims abstract description 17
- 238000012360 testing method Methods 0.000 claims abstract description 33
- 239000002184 metal Substances 0.000 claims abstract description 31
- 229910052751 metal Inorganic materials 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 14
- 239000004593 Epoxy Substances 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims abstract description 9
- 238000000576 coating method Methods 0.000 claims abstract description 9
- 230000035699 permeability Effects 0.000 claims description 16
- 238000011084 recovery Methods 0.000 claims description 10
- 230000004907 flux Effects 0.000 claims description 7
- 238000005086 pumping Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 229920006335 epoxy glue Polymers 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims 1
- 238000012512 characterization method Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 26
- 238000010586 diagram Methods 0.000 description 2
- 238000009533 lab test Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000002901 radioactive waste Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
- G01N7/10—Analysing materials by measuring the pressure or volume of a gas or vapour by allowing diffusion of components through a porous wall and measuring a pressure or volume difference
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Fluid Mechanics (AREA)
- Dispersion Chemistry (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention belongs to rock material characterization technique fields, and in particular to a kind of rock material measuring gas permebility device and its test method, comprising: epoxy gel coating, rubber seal plug, metal guide head, valve, rubber tube and manual vacuum aspiration pump；Measured hole is provided on the test surfaces of rock sample or chamber palisades, described rubber seal plug one end is arranged in measured hole, the other end of rubber seal plug is connected with metal guide head one end, and the metal guide head other end is connect by rubber tube with manual vacuum aspiration pump；Valve is provided on the rubber tube；The test surfaces of rock sample or chamber palisades are also coated with epoxy gel coating.
Description
Technical field
The invention belongs to rock material characterization technique fields, and in particular to a kind of rock material measuring gas permebility device
And its test method.
Background technique
In energy projects fields such as shale gas exploitation, underground natural gas storage tank exploitation and radioactive waste repository research and development, cave
The gas permeability of the materials such as room country rock be carry out production efficiency prediction, leakproofness assessment and safety evaluatio necessary to core join
Number.However, the indoor test method of gas permeability usually requires to apply confining pressure using triaxial test system at present, to guarantee to try
Test the air-proof condition of process；Gas pressurization system is needed simultaneously, forms pressure difference in the sample.The test period requirement of the above method
It is longer, experimental condition is complicated, and cannot achieve in-site measurement.Currently, permeability test method master used by engineering site
It to be hydraulic pressure test method, it is costly, testing efficiency is lower.Therefore, a kind of be simple and efficient, convenient for the rock of field application is researched and developed
The test device and test method of material gas permeability are the requirements of material property scene Fast Evaluation, to above-mentioned energy work
Journey is of great significance.
Summary of the invention
It is an object of the invention to propose a kind of rock material measuring gas permebility device and its test method, gas is solved
Body permeability laboratory test low efficiency, cost are big and are difficult to the problem of realizing engineering site test.
The technical scheme adopted by the invention is that:
A kind of rock material measuring gas permebility device, comprising: epoxy gel coating, rubber seal plug, metal guide head,
Valve, rubber tube and manual vacuum aspiration pump；Measured hole, the rubber seal plug one are provided on the test surfaces of rock sample
End is arranged in measured hole, and the other end of rubber seal plug is connected with metal guide head one end, the metal guide head other end
It is connect by rubber tube with manual vacuum aspiration pump；Valve is provided on the rubber tube；The test surfaces of rock sample also apply
There is epoxy gel coating.
Barometer is also equipped on manual vacuum aspiration pump as described above；The rubber seal plug generally cylindrical type, institute
The joint face center for stating rubber seal plug and metal guide head is provided with blind hole, blind hole middle section inner diameter is greater than in blind hole,
Lower both ends inner diameter, and blind hole upper/lower terminal hole inner diameter is less than the outer diameter of metal guide head.
The diameter of measured hole as described above is 1cm, depth 5cm；
Metal guide head middle section outer diameter as described above is greater than metal guide head upper/lower terminal outer diameter.
A kind of test method of rock material measuring gas permebility device as described above, includes the following steps:
Step 1: instrument connection is drilled through；
Step 2: assembling and testing device；
Step 3: test device subnormal ambient is established；
Step 4: record pressure recovery process；
Step 5: permeability is calculated.
Step 1 as described above: instrument connection is drilled through, comprising: bore on rock sample or chamber palisades using hand held electric drill
To take diameter be 1cm, the cylindrical measured hole that depth is 5cm.
Step 2 as described above: assembling and testing device, further includes: in rubber seal plug and rock sample or chamber palisades
Quick setting epoxy glue is filled on contact surface, rubber seal plug is filled in into measured hole, and sufficiently compacting seals to realize；By metal air guide
Head is filled in the centre bore of rubber seal plug, it is ensured that sealing；Metal guide head is connect with manual vacuum aspiration pump by rubber tube,
And valve is installed on rubber tube；Manual vacuum aspiration pump is furnished with can be with the barometer of real-time display internal pressure, by and by the second
Table zeroing is used for recording test time.
Step 3 as described above establishes test device subnormal ambient, further includes: is taken out using manual vacuum aspiration pump
Gas, until barometrical show value reaches the minimum air pressure P of settingmin, PminAtmospheric pressure P of the value less than 0.5 timesatm；Stop taking out
Gas closes valve, while starting the stopwatch record time.
Step 4 as described above: record pressure recovery process, comprising: the gas of different moments t during record pressure recovery
The reading P of meter is pressed, P v.s.t data are obtained.
Step 5 as described above: calculating permeability includes: to utilize circular hole radiant flux Theory Solution according to principle of least square method
P v.s.t data obtained in fit procedure four can finally determine gas permeability K；Circular hole radiant flux Theory Solution are as follows:
Wherein, P is that the barometer of t moment is read, unit Pa；PatmFor atmospheric pressure, unit Pa takes under room temperature
It is 105Pa；PminBarometrical reading, unit Pa, P when to close valveminAtmospheric pressure P of the value less than 0.5 timesatm；t-t0
For the stop watch figures corresponding to air pressure P；μ is the coefficient of dynamic viscosity of air, unit Pas, it is taken as 1.9 under room temperature ×
10-5Pa·s；DholeAnd DcoverThe respectively diameter of measured hole and rubber seal plug, unit m, and Dcover/Dhole>10。
The beneficial effects of the present invention are:
A kind of rock material measuring gas permebility device and its test method that the present invention designs, by rock sample
Or cylindrical instrument connection is drilled through on chamber palisades, subnormal ambient is formed in instrument connection using vacuum-pumping equipment；Stop pumping
Afterwards, aperture pressure recovery process is recorded；It is fitted test result using circular hole radiant flux Theory Solution, obtains rock sample or chamber rock
The gas permeability of wall.This method test process is simple, high-efficient, is able to solve gas permeability laboratory test low efficiency, generation
Valence is big and is difficult to the problem of realizing engineering site test.
Detailed description of the invention
Fig. 1 is a kind of rock material measuring gas permebility apparatus structure schematic diagram that the present invention designs；
Fig. 2 is that a kind of instrument connection air pressure change process for rock material measuring gas permebility device that the present invention designs is shown
It is intended to；
Fig. 3 is instrument connection and the round rubber sealing for a kind of rock material measuring gas permebility device that the present invention designs
The scale diagrams of plug.
Wherein: 1 be rock sample, 2 be measured hole, 3 be epoxy gel coating, 4 be rubber seal plug, 5 be metal guide head,
6 it is valve, 7 be rubber tube, 8 be barometer, 9 is manual vacuum aspiration pump.
Specific embodiment
A kind of rock material measuring gas permebility device, comprising: epoxy gel coating 3, rubber seal plug 4, metal air guide
First 5, valve 6, rubber tube 7 and manual vacuum aspiration pump 9；Measured hole 2, the rubber are provided on 1 test surfaces of rock sample
4 one end of sealing-plug is arranged in measured hole 2, and the other end of rubber seal plug 4 is connected with 5 one end of metal guide head, the metal
5 other end of guide head is connect by rubber tube 7 with manual vacuum aspiration pump 9；Valve 6 is provided on the rubber tube 7；Rock examination
The test surfaces of sample 1 are also coated with epoxy gel coating 3.
The rock material measuring gas permebility device is also mountable on chamber palisades.
Barometer 8 is also equipped on the manual vacuum aspiration pump 9；The rubber seal plug 4 generally cylindrical type, it is described
The joint face center of rubber seal plug 4 and metal guide head 5 is provided with blind hole, blind hole middle section inner diameter is greater than in blind hole,
Lower both ends inner diameter, and blind hole upper/lower terminal hole inner diameter is less than the outer diameter of metal guide head 5.
The diameter of the measured hole 2 is 1cm, depth 5cm.
The 5 middle section outer diameter of metal guide head is greater than 5 upper/lower terminal outer diameter of metal guide head.
A kind of test method of rock material measuring gas permebility device as described above, includes the following steps:
Step 1: instrument connection is drilled through；
Step 2: assembling and testing device；
Step 3: test device subnormal ambient is established；
Step 4: record pressure recovery process；
Step 5: permeability is calculated.
The step 1: instrument connection is drilled through, comprising: drill through on rock sample 1 or chamber palisades using hand held electric drill
The cylindrical measured hole 2 that diameter is 1cm, depth is 5cm.
The step 2: assembling and testing device, further includes: in connecing for rubber seal plug 4 and rock sample 1 or chamber palisades
Quick setting epoxy glue 3 is filled in contacting surface, rubber seal plug 4 is filled in into measured hole 2, and sufficiently compacting seals to realize；Metal is led
Gas head 5 is filled in the centre bore of rubber seal plug 4, it is ensured that sealing；Metal guide head 5 and manual vacuum aspiration pump 9 pass through rubber
Pipe 7 connects, and valve 6 is installed on rubber tube 7；Manual vacuum aspiration pump 9 is furnished with can be with the air pressure of real-time display internal pressure
Stopwatch zeroing will and be used for recording test time by meter 8.
The step 3 establishes test device subnormal ambient, further includes: is evacuated using manual vacuum aspiration pump 9, directly
Reach the minimum air pressure P of setting to the show value of barometer 8min, PminAtmospheric pressure P of the value less than 0.5 timesatm；Stop pumping,
Valve is closed, while starting the stopwatch record time.
The step 4: record pressure recovery process, comprising: the barometer 8 of different moments t during record pressure recovery
Reading P, obtain P v.s.t data.
The step 5: calculating permeability includes: to be fitted according to principle of least square method using circular hole radiant flux Theory Solution
P v.s.t data obtained in step 4 can finally determine gas permeability K；Circular hole radiant flux Theory Solution are as follows:
Wherein, P is that the barometer 8 of t moment is read, unit Pa；PatmFor atmospheric pressure, unit Pa takes under room temperature
It is 105Pa；PminThe reading of barometer 8, unit Pa, P when to close valveminAtmospheric pressure P of the value less than 0.5 timesatm；t-t0
For the stop watch figures corresponding to air pressure P；μ is the coefficient of dynamic viscosity of air, unit Pas, it is taken as 1.9 under room temperature ×
10-5Pa·s；DholeAnd DcoverThe respectively diameter of measured hole 2 and rubber seal plug 4, unit m, and Dcover/Dhole>10。
The present invention is explained in detail above in conjunction with drawings and examples, above-described embodiment be one of the invention preferably
Technical solution, but the present invention is not limited to above-described embodiments, within the knowledge of a person skilled in the art,
It can be with various changes can be made without departing from the purpose of the present invention.The content being not described in detail in the present invention can be with
Using the prior art.
Claims (10)
1. a kind of rock material measuring gas permebility device, it is characterised in that: include: epoxy gel coating (3), rubber seal plug
(4), metal guide head (5), valve (6), rubber tube (7) and manual vacuum aspiration pump (9)；In the test table of rock sample (1)
Be provided on face measured hole (2), the setting of described rubber seal plug (4) one end in measured hole (2), rubber seal plug (4) it is another
End is connected with metal guide head (5) one end, and metal guide head (5) other end is evacuated by rubber tube (7) and manual vacuum
Pump (9) connection；Valve (6) are provided on the rubber tube (7)；The test surfaces of rock sample (1) are also coated with epoxy gel coating
(3)。
2. a kind of rock material measuring gas permebility device according to claim 1, it is characterised in that: described true manually
Barometer (8) are also equipped on empty pump air pump (9)；The rubber seal plug (4) generally cylindrical type, the rubber seal plug
(4) blind hole is provided with the joint face center of metal guide head (5), blind hole middle section inner diameter is greater than blind hole upper/lower terminal
Inner diameter, and blind hole upper/lower terminal hole inner diameter is less than the outer diameter of metal guide head (5).
3. a kind of rock material measuring gas permebility device according to claim 1, it is characterised in that: the measured hole
(2) diameter is 1cm, depth 5cm.
4. a kind of rock material measuring gas permebility device according to claim 2, it is characterised in that: the metal is led
Gas head (5) middle section outer diameter is greater than metal guide head (5) upper/lower terminal outer diameter.
5. the test side of any rock material measuring gas permebility device in a kind of Claims 1-4 as described above
Method, it is characterised in that include the following steps:
Step 1: instrument connection is drilled through；
Step 2: assembling and testing device；
Step 3: test device subnormal ambient is established；
Step 4: record pressure recovery process；
Step 5: permeability is calculated.
6. a kind of test method of rock material measuring gas permebility device according to claim 5, it is characterised in that:
The step 1: instrument connection is drilled through, comprising: utilizing hand held electric drill to drill through on rock sample (1), diameter is 1cm, depth is
The cylindrical measured hole (2) of 5cm.
7. a kind of test method of rock material measuring gas permebility device according to claim 6, it is characterised in that:
The step 2: assembling and testing device, further includes: fill quick-drying on the contact surface of rubber seal plug (4) and rock sample (1)
Rubber seal plug (4) is filled in measured hole (2) by epoxy glue (3), and sufficiently compacting seals to realize；Metal guide head (5) are filled in
In the centre bore for entering rubber seal plug (4), it is ensured that sealing；Metal guide head (5) and manual vacuum aspiration pump (9) pass through rubber tube
(7) it connects, and valve (6) is installed on rubber tube (7)；Manual vacuum aspiration pump (9) is furnished with can be with real-time display internal pressure
Barometer (8), will simultaneously by stopwatch zeroing be used for recording test time.
8. a kind of test method of rock material measuring gas permebility device according to claim 7, it is characterised in that:
The step 3 establishes test device subnormal ambient, further includes: is evacuated using manual vacuum aspiration pump (9), until air pressure
The show value of meter (8) reaches the minimum air pressure P of settingmin, PminAtmospheric pressure P of the value less than 0.5 timesatm；Stop pumping, closes
Valve, while starting the stopwatch record time.
9. a kind of test method of rock material measuring gas permebility device according to claim 8, it is characterised in that:
The step 4: record pressure recovery process, comprising: the reading of the barometer (8) of different moments t during record pressure recovery
P obtains P v.s.t data.
10. a kind of test method of rock material measuring gas permebility device according to claim 9, feature exist
In: the step 5: calculating permeability includes: to utilize circular hole radiant flux Theory Solution fit procedure according to principle of least square method
P v.s.t data obtained in four can finally determine gas permeability K；Circular hole radiant flux Theory Solution are as follows:
Wherein, P is that the barometer (8) of t moment is read, unit Pa；PatmFor atmospheric pressure, unit Pa is taken as under room temperature
105Pa；PminThe reading of barometer (8), unit Pa, P when to close valveminAtmospheric pressure P of the value less than 0.5 timesatm；t-t0
For the stop watch figures corresponding to air pressure P；μ is the coefficient of dynamic viscosity of air, unit Pas, it is taken as 1.9 under room temperature ×
10-5Pa·s；DholeAnd DcoverThe respectively diameter of measured hole (2) and rubber seal plug (4), unit m, and Dcover/Dhole>
10。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811588511.4A CN109459371B (en) | 2018-12-25 | 2018-12-25 | Rock material gas permeability testing device and testing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811588511.4A CN109459371B (en) | 2018-12-25 | 2018-12-25 | Rock material gas permeability testing device and testing method thereof |
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| Publication Number | Publication Date |
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| CN109459371A true CN109459371A (en) | 2019-03-12 |
| CN109459371B CN109459371B (en) | 2024-04-09 |
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| CN201811588511.4A Active CN109459371B (en) | 2018-12-25 | 2018-12-25 | Rock material gas permeability testing device and testing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113588515A (en) * | 2021-07-28 | 2021-11-02 | 清华大学 | Water permeability coefficient detection device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113588515A (en) * | 2021-07-28 | 2021-11-02 | 清华大学 | Water permeability coefficient detection device and method |
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| CN109459371B (en) | 2024-04-09 |
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