CN109632557A - A kind of gas-liquid two-phase saturation coal petrography sample experimental provision and saturation degree test method - Google Patents
A kind of gas-liquid two-phase saturation coal petrography sample experimental provision and saturation degree test method Download PDFInfo
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- CN109632557A CN109632557A CN201910059348.0A CN201910059348A CN109632557A CN 109632557 A CN109632557 A CN 109632557A CN 201910059348 A CN201910059348 A CN 201910059348A CN 109632557 A CN109632557 A CN 109632557A
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- 239000003245 coal Substances 0.000 title claims abstract description 65
- 239000007788 liquid Substances 0.000 title claims abstract description 62
- 238000010998 test method Methods 0.000 title claims description 11
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000012530 fluid Substances 0.000 claims abstract description 31
- 238000000889 atomisation Methods 0.000 claims abstract description 17
- 238000005259 measurement Methods 0.000 claims abstract description 15
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 15
- 238000005086 pumping Methods 0.000 claims abstract description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052802 copper Inorganic materials 0.000 claims abstract description 10
- 239000010949 copper Substances 0.000 claims abstract description 10
- 230000000704 physical effect Effects 0.000 claims abstract description 6
- 230000006378 damage Effects 0.000 claims abstract description 5
- 230000009467 reduction Effects 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 230000010355 oscillation Effects 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 7
- 230000035699 permeability Effects 0.000 claims description 6
- 239000011435 rock Substances 0.000 claims description 6
- 238000002474 experimental method Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 230000008595 infiltration Effects 0.000 claims description 4
- 238000001764 infiltration Methods 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000009466 transformation Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 4
- 230000002708 enhancing effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
- G01N5/025—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content for determining moisture content
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- 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
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- 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
- G01N15/088—Investigating volume, surface area, size or distribution of pores; Porosimetry
- G01N15/0893—Investigating volume, surface area, size or distribution of pores; Porosimetry by measuring weight or volume of sorbed fluid, e.g. B.E.T. method
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
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- 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
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Abstract
The invention discloses a kind of gas-liquid two-phases to be saturated coal petrography sample experimental provision, including core holding unit, and the both ends of the core holding unit are connected separately with fluid inlet apparatus and device for draining fluid by fine and close copper pipe；The fluid inlet apparatus includes master device case one and multiple gas-liquid pressure-boosting casees, and humidity measurement instrument, pressure detecting instrument and methane concentration detector are provided on the master device case one, and the gas-liquid pressure-boosting case includes gas boosting case and liquid pressurizing tank；The device for draining fluid includes master device case two and vacuum pumping pump, humidity measurement instrument, pressure detecting instrument and methane concentration detector is provided on the master device case two, the vacuum pumping pump is for building environment under low pressure in master device case two.The present invention utilizes the liquid after atomization to replace traditional liquid, and while reducing resistance of the fluid across porous media when, destruction of the reduction fluid to coal petrography spline structure and physical property as far as possible reduces the difficulty of hold-up and gas-liquid displacement.
Description
Technical field
The present invention relates to coal production technical field, more particularly to a kind of gas-liquid two-phase be saturated coal petrography sample experimental provision and
Saturation degree test method.
Background technique
In coal bed gas well recovery process, with the progress of drainage and step-down process, coal seam reservoirs pore pressure is constantly reduced, coal
Rock effective stress becomes larger, the enhancing of stress sensitive effect, permeability reduction；When reservoir pressure is reduced to critical desorption pressures
Afterwards, the gas for being adsorbed in coal petrography starts to desorb output, and matrix of coal shrinks effect, and permeability starts to be gradually increased, and forms one
A asymmetric U-typed change curve.Positives and negatives make coal reservoir fracture system be at complicated dynamic changing process always
In, and the reason of cause permeability that dynamic change occurs, the dynamic change of reservoir gas and water state in the exactly different mining times.
Therefore, the Permeability Oe Coal And Porous Rock And Fractured Rock and its change procedure probed under different air water states can provide for the foundation of coal bed gas extraction system
With reference to guidance.
Direct bowssening is mostly used for the saturation experiments of coal petrography sample both at home and abroad at present, in the relatively short feelings of soaking time
Under condition, it not can guarantee the hold-up degree of coal petrography sample, and directly bowssening can impact the physical property of coal petrography sample, damage
Bad coal petrography sample original structure.
Summary of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a kind of gas-liquid two-phases to be saturated coal petrography sample experimental provision
And traditional fluid liquid is atomized into nanoscale size using ultrasonic wave higher-order of oscillation generating device by saturation degree test method
Liquid particles, the hole inside coal petrography is entered by pressure difference and (is split) in gap, sufficiently be saturated, and pass through mass difference method, psychrometric difference
It determines the water saturation degree of coal petrography sample, similarly, can be determined that the gas degree of saturation of coal petrography sample according to methane concentration difference method.
The technical scheme adopted by the invention is that: a kind of gas-liquid two-phase saturation coal petrography sample experimental provision, including rock core clamping
The both ends of device, the core holding unit are connected separately with fluid inlet apparatus and device for draining fluid by fine and close copper pipe；It is described
Fluid inlet apparatus includes master device case one and multiple gas-liquid pressure-boosting casees, is provided with Humidity Detection on the master device case one
Instrument, pressure detecting instrument and methane concentration detector, the gas-liquid pressure-boosting case include gas boosting case and liquid pressurizing tank；The stream
Body discharger includes master device case two and vacuum pumping pump, and humidity measurement instrument, pressure inspection are provided on the master device case two
Instrument and methane concentration detector are surveyed, the vacuum pumping pump is for building environment under low pressure in master device case two.
Further, booster pump is equipped in the gas boosting case, the booster pump is connected with air accumulator, the liquid
Booster pump is equipped in pressurizing tank, the booster pump is connected with airtight water tank.
Further, ultrasonic wave high frequency oscillation generating device is installed in the airtight water tank.
Further, the core holding unit bottom is equipped with weighing unit.
Further, the core holding unit also with the pressure for monitoring coal petrography sample stress variation in gas-liquid saturation process
Tension gauge is connected, guarantee experiment safely, go on smoothly.
Further, gas-liquid two-phase is saturated coal petrography sample saturation degree test method, comprising the following steps: a: coal petrography sample is placed
On the core holding unit with weighing unit, ultrasonic wave high frequency oscillation generating device is opened, the atomization of liquid is realized, after atomization
Liquid after pressurized treatment, connect by fine and close copper pipe with master device case one, be provided with Humidity Detection on master device case one
Instrument, pressure detecting instrument and methane concentration detector obtain the gas-liquid state in measured seal box by reading meter reading.
Traditional liquid is replaced using the liquid after atomization, while reducing resistance of the fluid across porous media when, to the greatest extent may be used
Destruction of the fluid to coal petrography spline structure and physical property can be reduced；
B: gas is entered in core holding unit with the liquid after atomization by fine and close copper pipe, under the action of pressure difference
It penetrates into inside coal petrography sample, is entered in device for draining fluid by the hole crack inside coal petrography sample, by mass difference method come really
Determine coal petrography sample maximum saturation quality mmax, compared with the quality m of coal petrography sample under natural conditions, calculate δm=mmax- m, setting etc.
Difference seriesThe different numerical value of arithmetic progression respectively correspond different saturation；
C: opening vacuum pumping pump, and environment under low pressure, enhancing master device case one and master device case two will be built in master device case two
In pressure difference δp, the reading of comparison master device case one and humidity measurement instrument and methane concentration detector on master device case two, really
Determine psychrometric difference δ when different saturationeWith methane concentration difference δc, as benchmark reference, can also be determined according to meter reading difference
Different saturation degrees.
Further, it is first carried out in coal petrography sample saturation degree test method for the coal petrography sample that physical structure, property are different
Saturation experiments test, obtains the corresponding saturation degree criteria for classifying, then carry out saturation degree measurement；It is smaller for pore structure, infiltration
Property poor coal petrography sample, promote infiltration and saturation by the way of atomization；The experimentation carries out under the conditions of room temperature, transformation.
Compared with prior art, the beneficial effects of the present invention are: replacing traditional liquid using the liquid after atomization,
While reducing resistance of the fluid across porous media when, reduction fluid as far as possible breaks coal petrography spline structure and physical property
It is bad, reduce the difficulty of hold-up and gas-liquid displacement.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that a kind of gas-liquid two-phase of the present invention is saturated coal petrography sample experimental provision.
Wherein: 1- core holding unit, 2- fluid inlet apparatus, 3- device for draining fluid, 11- weighing unit, 21- master device
Case one, 22- gas-liquid pressure-boosting case, 31- master device case two, 32- vacuum pumping pump, 211- humidity measurement instrument, 212- pressure detecting instrument,
213- methane concentration detector, 2211- booster pump, 2212- air accumulator, 2221- airtight water tank, 22211- ultrasonic wave high frequency oscillation
Generating device
Specific embodiment
In order to deepen the understanding of the present invention, present invention will be further explained below with reference to the attached drawings and examples, the implementation
Example for explaining only the invention, does not constitute protection scope of the present invention and limits.
As shown in Figure 1, a kind of gas-liquid two-phase is saturated coal petrography sample experimental provision, including core holding unit 1, the rock core clamping
The both ends of device 1 are connected separately with fluid inlet apparatus 2 and device for draining fluid 3 by fine and close copper pipe；The fluid inlet apparatus 2
Including master device case 1 and multiple gas-liquid pressure-boosting casees 22, humidity measurement instrument 211, pressure are provided on the master device case 1
Tension gauge 212 and methane concentration detector 213, the gas-liquid pressure-boosting case 22 include gas boosting case 221 and liquid pressurizing tank
222；The device for draining fluid 3 includes master device case 2 31 and vacuum pumping pump 32, is provided on the master device case 2 31
Humidity measurement instrument 211, pressure detecting instrument 212 and methane concentration detector 213, the vacuum pumping pump 32 are used in master device case two
Environment under low pressure is built in 31.
In the above-described embodiments, booster pump 2211, the booster pump 2211 and gas storage are equipped in the gas boosting case 221
Tank 2212 is connected, and is equipped with booster pump 2211, the booster pump 2211 and 2221 phase of airtight water tank in the liquid pressurizing tank 222
Connection；Ultrasonic wave high frequency oscillation generating device 22211 is installed in the airtight water tank 2221.
In the above-described embodiments, 1 bottom of core holding unit is equipped with weighing unit 11, and core holding unit 1 also connects
It is connected to pressure detecting instrument 212, the pressure detecting instrument 212 is protected for monitoring coal petrography sample stress variation in gas-liquid saturation process
Confirm test safely, go on smoothly.
In the above-described embodiments, gas-liquid two-phase is saturated coal petrography sample saturation degree test method, comprising the following steps: a: by coal petrography
Sample is placed on the core holding unit with weighing unit, is opened ultrasonic wave high frequency oscillation generating device, is realized the atomization of liquid,
Liquid after atomization is connect after pressurized treatment, through fine and close copper pipe with master device case one, is provided on master device case one wet
Detector, pressure detecting instrument and methane concentration detector are spent, obtains the gas in measured seal box by reading meter reading
Liquid status.Traditional liquid is replaced using the liquid after atomization, is reducing the same of resistance of the fluid across porous media when
When, destruction of the reduction fluid to coal petrography spline structure and physical property as far as possible；
B: gas is entered in core holding unit with the liquid after atomization by fine and close copper pipe, under the action of pressure difference
It penetrates into inside coal petrography sample, is entered in device for draining fluid by the hole crack inside coal petrography sample, by mass difference method come really
Determine coal petrography sample maximum saturation quality mmax, compared with the quality m of coal petrography sample under natural conditions, calculate δm=mmax- m, setting etc.
Difference seriesThe different numerical value of arithmetic progression respectively correspond different saturation；
C: opening vacuum pumping pump, and environment under low pressure, enhancing master device case one and master device case two will be built in master device case two
In pressure difference δp, the reading of comparison master device case one and humidity measurement instrument and methane concentration detector on master device case two, really
Determine psychrometric difference δ when different saturationeWith methane concentration difference δc, as benchmark reference, can also be determined according to meter reading difference
Different saturation degrees.
In the above-described embodiments, the different coal petrography sample of physical structure, property is directed in coal petrography sample saturation degree test method,
Saturation experiments test is first carried out, obtains the corresponding saturation degree criteria for classifying, then carry out saturation degree measurement；For pore structure compared with
Small, the poor coal petrography sample of permeability promotes infiltration and saturation by the way of atomization；The experimentation is in room temperature, transformation condition
Lower progress.
What the embodiment of the present invention was announced is preferred embodiment, and however, it is not limited to this, the ordinary skill people of this field
Member, easily according to above-described embodiment, understands spirit of the invention, and make different amplification and variation, but as long as not departing from this
The spirit of invention, all within the scope of the present invention.
Claims (7)
1. a kind of gas-liquid two-phase is saturated coal petrography sample experimental provision, it is characterised in that: including core holding unit, the core holding unit
Both ends fluid inlet apparatus and device for draining fluid are connected separately with by fine and close copper pipe；The fluid inlet apparatus includes master
Device case one and multiple gas-liquid pressure-boosting casees are provided with humidity measurement instrument, pressure detecting instrument and methane on the master device case one
Concentration detector, the gas-liquid pressure-boosting case include gas boosting case and liquid pressurizing tank；The device for draining fluid includes main dress
Case two and vacuum pumping pump are set, humidity measurement instrument, pressure detecting instrument and methane concentration detection are provided on the master device case two
Instrument, the vacuum pumping pump is for building environment under low pressure in master device case two.
2. gas-liquid two-phase according to claim 1 is saturated coal petrography sample experimental provision, it is characterised in that: the gas boosting case
Interior to be equipped with booster pump, the booster pump is connected with air accumulator, is equipped with booster pump in the liquid pressurizing tank, the booster pump and
Airtight water tank is connected.
3. gas-liquid two-phase according to claim 2 is saturated coal petrography sample experimental provision, it is characterised in that: in the airtight water tank
Ultrasonic wave high frequency oscillation generating device is installed.
4. gas-liquid two-phase according to claim 1 is saturated coal petrography sample experimental provision, it is characterised in that: the core holding unit
Bottom is equipped with weighing unit.
5. gas-liquid two-phase according to claim 1 is saturated coal petrography sample experimental provision, it is characterised in that: the core holding unit
Also it is connected with for monitoring coal petrography sample pressure detecting instrument of stress variation in gas-liquid saturation process.
6. gas-liquid two-phase according to claim 1 is saturated coal petrography sample saturation degree test method, it is characterised in that: including following
Step:
A: coal petrography sample is placed on the core holding unit with weighing unit, opens ultrasonic wave high frequency oscillation generating device, real
The atomization of existing liquid, the liquid after atomization are connect after pressurized treatment, through fine and close copper pipe with master device case one, master device case
It is provided with humidity measurement instrument, pressure detecting instrument and methane concentration detector on one, is obtained by reading meter reading and measured
Gas-liquid state in seal box.Traditional liquid is replaced using the liquid after atomization, passes through porous media reducing fluid
When resistance while, destruction of the reduction fluid to coal petrography spline structure and physical property as far as possible；
B: gas is entered in core holding unit with the liquid after atomization by fine and close copper pipe, is permeated under the action of pressure difference
Into inside coal petrography sample, is entered in device for draining fluid by the hole crack inside coal petrography sample, coal is determined by mass difference method
Rock sample maximum saturation quality mmax, compared with the quality m of coal petrography sample under natural conditions, calculate δm=mmax- m, the differences such as setting
ColumnThe different numerical value of arithmetic progression respectively correspond different saturation；
C: opening vacuum pumping pump, and environment under low pressure will be built in master device case two, enhances in master device case one and master device case two
Pressure difference δp, the reading of humidity measurement instrument and methane concentration detector on master device case one and master device case two is compared, is determined not
With psychrometric difference δ when saturation degreeeWith methane concentration difference δc, as benchmark reference, difference can also be determined according to meter reading difference
Saturation degree.
7. gas-liquid two-phase according to claim 6 is saturated coal petrography sample saturation degree test method, it is characterised in that: in coal petrography sample
For the coal petrography sample that physical structure, property are different in saturation degree test method, saturation experiments test is first carried out, is obtained corresponding full
With the degree criteria for classifying, then saturation degree measurement is carried out；It is smaller for pore structure, the poor coal petrography sample of permeability, using atomization
Mode promotes infiltration and saturation；The experimentation carries out under the conditions of room temperature, transformation.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910059348.0A CN109632557B (en) | 2019-01-22 | 2019-01-22 | Gas-liquid two-phase saturated coal rock sample experimental device and saturation testing method |
| LU101541A LU101541B1 (en) | 2019-01-22 | 2019-05-22 | Gas-liquid two-phase saturated coal rock sample experimental device and saturation test method |
| PCT/CN2019/087898 WO2020151138A1 (en) | 2019-01-22 | 2019-05-22 | Gas-liquid two-phase saturation coal rock sample experiment device and saturation test method |
| NL2024554A NL2024554B1 (en) | 2019-01-22 | 2019-12-22 | Gas-liquid two-phase saturated coal rock sample experimental device and saturation test method |
| BE20195975A BE1026550B1 (en) | 2019-01-22 | 2019-12-24 | TEST DEVICE FOR TWO-PHASE GAS-LIQUID SATURATED CHARCOAL SAMPLES AND SATURATION TEST METHOD |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910059348.0A CN109632557B (en) | 2019-01-22 | 2019-01-22 | Gas-liquid two-phase saturated coal rock sample experimental device and saturation testing method |
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| CN109632557A true CN109632557A (en) | 2019-04-16 |
| CN109632557B CN109632557B (en) | 2021-11-16 |
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| Country | Link |
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| CN (1) | CN109632557B (en) |
| BE (1) | BE1026550B1 (en) |
| LU (1) | LU101541B1 (en) |
| NL (1) | NL2024554B1 (en) |
| WO (1) | WO2020151138A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110411905A (en) * | 2019-05-28 | 2019-11-05 | 西南石油大学 | A kind of high temperature and pressure shale unstable state air water mutually seeps test device and method |
| WO2020151138A1 (en) * | 2019-01-22 | 2020-07-30 | 中国矿业大学 | Gas-liquid two-phase saturation coal rock sample experiment device and saturation test method |
| CN114166714A (en) * | 2021-11-11 | 2022-03-11 | 河北工程大学 | Penetration test device for simulating gas-liquid two-phase flow in coal body |
| CN115615878A (en) * | 2022-09-23 | 2023-01-17 | 浙江大学 | Automatic saturation device of high-range tensiometer and saturation manufacturing method |
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| CN114279800B (en) * | 2021-12-10 | 2023-07-14 | 太原理工大学 | Preparation method of coal-rock combination body model sample considering interlayer interface property |
| CN115165951B (en) * | 2022-05-23 | 2024-04-16 | 中国科学院武汉岩土力学研究所 | Supercritical CO determination under reservoir temperature and pressure conditions 2 Method and device for displacing shale gas efficiency |
| CN117433977B (en) * | 2023-12-08 | 2024-03-26 | 西南石油大学 | Supercritical CO 2 Device and method for detecting in-situ permeability of shale reaction |
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Also Published As
| Publication number | Publication date |
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| BE1026550A1 (en) | 2020-03-13 |
| CN109632557B (en) | 2021-11-16 |
| LU101541B1 (en) | 2020-05-08 |
| LU101541A1 (en) | 2020-04-17 |
| WO2020151138A1 (en) | 2020-07-30 |
| BE1026550B1 (en) | 2021-03-03 |
| NL2024554A (en) | 2020-08-18 |
| NL2024554B1 (en) | 2020-11-23 |
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