CN106501298B - Macrovoid coal and rock carbon dioxide displacement gas process dynamics analysis method - Google Patents
Macrovoid coal and rock carbon dioxide displacement gas process dynamics analysis method Download PDFInfo
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- CN106501298B CN106501298B CN201610930173.2A CN201610930173A CN106501298B CN 106501298 B CN106501298 B CN 106501298B CN 201610930173 A CN201610930173 A CN 201610930173A CN 106501298 B CN106501298 B CN 106501298B
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 124
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 95
- 239000011435 rock Substances 0.000 title claims abstract description 62
- 239000003245 coal Substances 0.000 title claims abstract description 61
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 47
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 47
- 238000004540 process dynamic Methods 0.000 title claims abstract description 25
- 238000004458 analytical method Methods 0.000 title claims abstract description 18
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 35
- 238000012360 testing method Methods 0.000 claims abstract description 25
- 238000003384 imaging method Methods 0.000 claims abstract description 12
- 238000002347 injection Methods 0.000 claims abstract description 4
- 239000007924 injection Substances 0.000 claims abstract description 4
- 238000012544 monitoring process Methods 0.000 claims abstract description 4
- 238000001179 sorption measurement Methods 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 53
- 238000005481 NMR spectroscopy Methods 0.000 claims description 27
- 238000010438 heat treatment Methods 0.000 claims description 21
- 238000009413 insulation Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 4
- 150000001335 aliphatic alkanes Chemical class 0.000 claims description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 2
- 230000008676 import Effects 0.000 claims description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 239000004408 titanium dioxide Substances 0.000 claims 1
- 229960004424 carbon dioxide Drugs 0.000 description 31
- 238000002595 magnetic resonance imaging Methods 0.000 description 10
- 238000011161 development Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000012800 visualization Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000013421 nuclear magnetic resonance imaging Methods 0.000 description 1
- 230000009919 sequestration Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N24/00—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects
- G01N24/08—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects by using nuclear magnetic resonance
- G01N24/081—Making measurements of geologic samples, e.g. measurements of moisture, pH, porosity, permeability, tortuosity or viscosity
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- Life Sciences & Earth Sciences (AREA)
- High Energy & Nuclear Physics (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The present invention provides a kind of macrovoid coal and rock carbon dioxide displacement gas process dynamics analysis method, and this method comprises the following steps：S1, coal and rock test specimen to be measured is put into macrovoid coal and rock carbon dioxide displacement gas process dynamics analytical equipment, connects the data cable connector for collecting relevant parameter and seal fixation；Corresponding analytical parameters in S2, setting device；S3, the entrance injection methane gas from displacement inlet pipe, make coal and rock test specimen to be measured reach adsorption saturation state, then inject carbon dioxide in the entrance of displacement inlet pipe, pass through NMR imaging and T2Spectrogram analyzes the dynamic process of carbon dioxide displacement methane；S4, monitoring displacement inlet pipe and gas pressure and gas flow in displacement outlet pipe, corresponding data and image are recorded by computer；S5, after the displacement time of setting and Flooding Efficiency is reached, the data and image of record are handled.The present invention can carry out macrovoid coal and rock carbon dioxide displacement gas Assessment of results under high-temperature and high-pressure conditions.
Description
Technical field
The present invention relates to displacement technical field, and in particular to a kind of macrovoid coal and rock carbon dioxide displacement gas process is moved
State analysis method.
Background technology
Many fields such as oil development, coal-bed gas exploitation and carbon dioxide sequestration are directed to displacement technology, displacement skill
The ripe development of art and effective utilization in association area, it is always the target of many expert and scholar joint researches in recent years.
And the basis for studying displacement technology is exactly the flowing law for understanding fluid in rock core.Fluid in rock core is obtained in laboratory conditions
Flowing law, the method used at present are to utilize low-field nuclear magnetic resonance imaging technique, and rock core displacement test is combined with this technology
Get up.It is existing because the rock in stratum is under high-temperature and high-pressure conditions but the present inventor has found by research
Achievement can not apply to well in Practical Project, and how to understand macrovoid coal and rock carbon dioxide displacement watt in the earth formation
This current intelligence, turn into technical problem urgently to be resolved hurrily at present.
The content of the invention
For, because the rock in stratum is under high-temperature and high-pressure conditions, existing achievement can not be very existing for prior art
Good luck uses the technical problem in Practical Project, and the present invention provides a kind of macrovoid coal and rock carbon dioxide displacement gas process and moved
State analysis method, this method can carry out macrovoid coal and rock carbon dioxide displacement gas effect assessment point under high-temperature and high-pressure conditions
Analysis.
In order to solve the above-mentioned technical problem, present invention employs following technical scheme：
A kind of macrovoid coal and rock carbon dioxide displacement gas process dynamics analysis method, employs one kind in the method
Macrovoid coal and rock carbon dioxide displacement gas process dynamics analytical equipment, the macrovoid coal and rock carbon dioxide displacement gas
Process dynamics analytical equipment includes：
Hollow annular holder body, the side surface of the clamp body are enclosed provided with heat-insulation layer, the heat-insulation layer
Component side surface is enclosed provided with malcoils；
Be provided with hollow annular gum cover in the cavity of the clamp body, the cavity top of the annular gum cover provided with
The close-fitting top end of cavity inner wall, the cavity bottom of the annular gum cover are provided with and the close-fitting lower top of cavity inner wall
Head, inwall, top end and the lower top of the annular gum cover are surrounded by the space that can place coal and rock test specimen to be measured jointly；
The cavity top of the annular gum cover is provided with the upper plug head contacted with top end, the cavity bottom of the annular gum cover
Provided with the lower end cap contacted is come directly towards with lower, the upper end of the annular gum cover is additionally provided with annular gum cover and upper plug head tight clamping fit
Upper hermetic collar, the lower end of the annular gum cover are additionally provided with the lower hermetic collar by annular gum cover and lower end cap tight clamping fit, institute
State lower end cap and be provided with the lower end cap fixing end that lower end cap bottom is located to clamp body lower surface, the upper plug head
Enclose provided with the upper plug head sealed end that upper plug head is fixed on to clamp body top, the top end and upper plug head top side surface
Upper insertion is provided with displacement inlet pipe, is penetrated in the lower top, lower end cap and lower end cap fixing end and is provided with displacement outlet pipe, the clamping
Zone of heating, the zone of heating, the cavity inner wall of clamp body and upper plug head sealed end are embedded with the cavity inner wall of device body
An annular confined pressure chamber is collectively formed between the upper plug head, annular gum cover and lower end cap；
The top of the clamp body is provided with and the oil inlet pipe of confined pressure chamber and the zone of heating connected with zone of heating
Flowline, the bottom of the clamp body is provided with to be entered with the oil discharge pipe of confined pressure chamber and the zone of heating connected with zone of heating
Oil pipe, and the bottom of the clamp body is additionally provided with data cable connector and the TEMP for detecting confined pressure chamber indoor temperature
Device；
This method comprises the following steps：
S1, the inwall that coal and rock test specimen to be measured is put into the annular gum cover, top end and lower come directly towards the sky surrounded jointly
In, the data cable connector for collecting relevant parameter is connected, and seal and fix the macrovoid coal and rock carbon dioxide flooding
For gas process dynamics analytical equipment；
S2, confined pressure in the confined pressure chamber is set as 0~25MPa, temperature is 0~100 DEG C, the coal and rock examination to be measured
The axle pressure of part is 0~60KN, and the displacement pressure in the displacement inlet pipe is 0~22MPa, the displacement pressure in the displacement outlet pipe
For 0~22MPa；
S3, the entrance injection methane gas from the displacement inlet pipe, make coal and rock test specimen to be measured reach adsorption saturation state,
Again displacement inlet pipe entrance inject carbon dioxide, due to including1H、3He、13C、19F、31P and129Atomic nucleus including Xe
Powered reason, there is spin angular momentaum, nuclear magnetic resonance occurs under magnetic state, using NMR to the hydrogen in methane
Atom sensitiveness is high and the characteristic insensitive to carbon dioxide, passes through NMR imaging and T2Spectrogram analyzes carbon dioxide displacement first
The dynamic process of alkane；
S4, the monitoring displacement inlet pipe and gas pressure and gas flow in displacement outlet pipe, are recorded by computer and passed in and out
Gas pressure and rate of discharge, T2Spectrogram and cross-sectional image；
S5, the experimental program according to setting, after the Flooding Efficiency of setting is reached, at the data and image to record
Reason, obtain under different condition inside coal and rock test specimen to be measured gas DYNAMIC DISTRIBUTION feature in displacement process.
Compared with prior art, macrovoid coal and rock carbon dioxide displacement gas process dynamics analysis side provided by the invention
Method, coal and rock test specimen to be measured is first placed using macrovoid coal and rock carbon dioxide displacement gas process dynamics analytical equipment, and
Sealed and fixed；Next sets confined pressure and temperature in confined pressure chamber, the axle pressure of coal and rock test specimen to be measured, and displacement
Displacement pressure in inlet pipe and displacement outlet pipe；Then methane gas and carbon dioxide gas are implanted sequentially from the entrance of displacement inlet pipe
Body, by NMR imaging come the dynamic process of observation and analysis carbon dioxide displacement methane；Then monitor displacement inlet pipe and displacement goes out
Gas pressure and gas flow in pipe, and record corresponding data and image；Finally the data and image of record are handled, obtained
Gas DYNAMIC DISTRIBUTION feature in the displacement process of coal and rock test specimen inside to be measured under to different condition.The present invention is ground by visualization
Study carefully, obtain the distribution characteristics of gas in coal petrography displacement process under high-temperature and high-pressure conditions, and combine the longitudinal direction of coal petrography in displacement process
Strain and the data such as transverse strain, obtain Flooding Efficiency evaluation index parameter, for displacement technology managing with providing at the scene
By guidance.
Further, in the step S2, the confined pressure in the confined pressure chamber is 20MPa, and temperature is 80 DEG C, the coal to be measured
The axle pressure of rock test piece is 50KN, and the displacement pressure in the displacement inlet pipe is 20MPa, the displacement pressure in the displacement outlet pipe
For 20MPa.
Further, it is described to pass through NMR imaging and T in the step S32Spectrogram analyzes carbon dioxide displacement methane
Dynamic process, it includes gathering H NMR spectroscopy and high quality MRI image in real time, by gathering H NMR spectroscopy signal and high quality MRI image
Change is qualitative and rational judgment displacement progress and Flooding Efficiency.
Further, in the step S5, the Flooding Efficiency is that displacement efficiency is more than 70%.
Further, in the step S5, the described pair of data recorded and image are handled, and it includes the reality for methane
When H NMR spectroscopy and high quality MRI image, the real-time H NMR spectroscopy signal intensity situation at more each moment, the dynamic of observation spectrogram distribution becomes
Change, analyze the process of displacement, while by MRI imagings come rational judgment displacement position and effect.
Brief description of the drawings
Fig. 1 is macrovoid coal and rock carbon dioxide displacement gas process dynamics analytical equipment structural representation provided by the invention
Figure.
In figure, 1, clamp body；2nd, heat-insulation layer；3rd, malcoils；4th, annular gum cover；5th, top end；6th, lower top
Head；7th, upper plug head；8th, lower end cap；9th, upper hermetic collar；10th, lower hermetic collar；11st, lower end cap fixing end；12nd, upper plug head seals
End；13rd, displacement inlet pipe；14th, displacement outlet pipe；15th, zone of heating；16th, confined pressure chamber；17th, oil inlet pipe；18th, zone of heating flowline；
19th, oil discharge pipe；20th, zone of heating oil inlet pipe；21st, data cable connector；22nd, temperature sensor；100th, coal and rock test specimen to be measured.
Embodiment
In order that the technical means, the inventive features, the objects and the advantages of the present invention are easy to understand, tie below
Conjunction is specifically illustrating, and the present invention is expanded on further.
In the description of the invention, it is to be understood that term " longitudinal direction ", " radial direction ", " length ", " width ", " thickness ",
The orientation of instruction such as " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " or
Position relationship is based on orientation shown in the drawings or position relationship, is for only for ease of the description present invention and simplifies description, without
It is instruction or implies that signified device or element there must be specific orientation, with specific azimuth configuration and operation, therefore not
It is understood that as limitation of the present invention.In the description of the invention, unless otherwise indicated, " multiple " are meant that two or two
More than.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
It refer to shown in Fig. 1, the present invention provides a kind of macrovoid coal and rock carbon dioxide displacement gas process dynamics analysis
Method, a kind of macrovoid coal and rock carbon dioxide displacement gas process dynamics analytical equipment is employed in the method, it is described big
Hole coal and rock carbon dioxide displacement gas process dynamics analytical equipment includes：
Hollow annular holder body 1, the side surface of the clamp body 1 are enclosed provided with heat-insulation layer 2, the heat-insulation layer
2 component side surface is enclosed provided with malcoils 3；
Hollow annular gum cover 4 is provided with the cavity of the clamp body 1, the cavity top of the annular gum cover 4 is set
There is top end 5 close-fitting with cavity inner wall, the cavity bottom of the annular gum cover 4 is provided with close-fitting with cavity inner wall
Lower top 6, inwall, top end 5 and the lower top 6 of the annular gum cover 4 are surrounded by jointly can place coal and rock test specimen 100 to be measured
Space；
The cavity top of the annular gum cover 4 is provided with the upper plug head 7 contacted with top end 5, the cavity of the annular gum cover 4
Bottom is provided with the lower end cap 8 contacted with lower top 6, and the upper end of the annular gum cover 4 is additionally provided with annular gum cover 4 and upper plug head 7
The upper hermetic collar 9 of tight clamping fit, the lower end of the annular gum cover 4 are additionally provided with annular gum cover 4 and the tight clamping fit of lower end cap 8
Lower hermetic collar 10, the lower end cap 8 are consolidated provided with the lower end cap that lower end cap bottom is located to the lower surface of clamp body 1
Fixed end 11, the top side surface of the upper plug head 7 are enclosed close provided with the upper plug head that upper plug head 7 is fixed on to the top of clamp body 1
12 are blocked, is penetrated on the top end 5 and upper plug head 7 and is provided with displacement inlet pipe 13, lower top 6, lower end cap 8 and the lower end cap are consolidated
Insertion is provided with displacement outlet pipe 14 on fixed end 11, and zone of heating 15, the heating are embedded with the cavity inner wall of the clamp body 1
Layer 15, the cavity inner wall of clamp body 1 and upper plug head sealed end 12 and the upper plug head 7, annular gum cover 4 and lower end cap 8 it
Between collectively form an annular confined pressure chamber 16；
The top of the clamp body 1 is provided with the oil inlet pipe 17 that is connected with confined pressure chamber 16 and connected with zone of heating 15
Zone of heating flowline 18, the bottom of the clamp body 1 are provided with the oil discharge pipe 19 connected with confined pressure chamber 16 and and zone of heating
The zone of heating oil inlet pipe 20 of 15 connections, and the bottom of the clamp body 1 is additionally provided with data cable connector 21 and enclosed for detecting
Press the temperature sensor 22 of temperature in chamber 16；
This method comprises the following steps：
S1, the inwall that coal and rock test specimen 100 to be measured is put into the annular gum cover 4, top end 5 and lower top 6 are enclosed jointly
Into space in, connect the data cable connector 21 for collecting relevant parameter, and seal and fix the macrovoid coal and rock two
Carbonoxide displacement gas process dynamics analytical equipment；
S2, confined pressure in the confined pressure chamber 16 is set as 0~25MPa, temperature is 0~100 DEG C, the coal and rock to be measured
The axle pressure of test specimen 100 is 0~60KN, and the displacement pressure in the displacement inlet pipe 13 is 0~22MPa, in the displacement outlet pipe 14
Displacement pressure be 0~22MPa；
S3, the entrance injection methane gas from the displacement inlet pipe 13, make coal and rock test specimen 100 to be measured reach adsorption saturation
State, then displacement inlet pipe 13 entrance inject carbon dioxide, due to including1H、3He、13C、19F、31P and129Including Xe
The powered reason of atomic nucleus, there is spin angular momentaum, nuclear magnetic resonance occurs under magnetic state, using NMR to methane
In hydrogen atom sensitiveness is high and the characteristic insensitive to carbon dioxide, pass through NMR imaging and T2Spectrogram analyzes carbon dioxide
The dynamic process of displacement methane；
S4, the monitoring displacement inlet pipe 13 and gas pressure and gas flow in displacement outlet pipe 14, are recorded by computer
Import and export gas pressure and rate of discharge, T2Spectrogram and cross-sectional image；
S5, the experimental program according to setting, after the Flooding Efficiency of setting is reached, at the data and image to record
Reason, obtain under different condition gas DYNAMIC DISTRIBUTION feature in the inside displacement process of coal and rock test specimen 100 to be measured.
Compared with prior art, macrovoid coal and rock carbon dioxide displacement gas process dynamics analysis side provided by the invention
Method, coal and rock test specimen to be measured is first placed using macrovoid coal and rock carbon dioxide displacement gas process dynamics analytical equipment, and
Sealed and fixed；Next sets confined pressure and temperature in confined pressure chamber, the axle pressure of coal and rock test specimen to be measured, and displacement
Displacement pressure in inlet pipe and displacement outlet pipe；Then methane gas and carbon dioxide gas are implanted sequentially from the entrance of displacement inlet pipe
Body, by NMR imaging come the dynamic process of observation and analysis carbon dioxide displacement methane；Then monitor displacement inlet pipe and displacement goes out
Gas pressure and gas flow in pipe, and record corresponding data and image；Finally the data and image of record are handled, obtained
Gas DYNAMIC DISTRIBUTION feature in the displacement process of coal and rock test specimen inside to be measured under to different condition.The present invention is ground by visualization
Study carefully, obtain the distribution characteristics of gas in coal petrography displacement process under high-temperature and high-pressure conditions, and combine the longitudinal direction of coal petrography in displacement process
Strain and the data such as transverse strain, obtain Flooding Efficiency evaluation index parameter, for displacement technology managing with providing at the scene
By guidance.
As specific embodiment, in the step S2, the confined pressure in the confined pressure chamber 16 is 20MPa, and temperature is 80 DEG C,
The axle pressure of the coal and rock test specimen 100 to be measured is 50KN, and the displacement pressure in the displacement inlet pipe 13 is 20MPa, the displacement
Displacement pressure in outlet pipe 14 is 20MPa.
It is described to pass through NMR imaging and T in the step S3 as specific embodiment2Spectrogram analyzes carbon dioxide flooding
For the dynamic process of methane, it includes gathering NMR (Nuclear Magnetic Resonance Spectroscopy, core in real time
Magnetic resonance spectrum) spectrum and high quality MRI (Magnetic Resonance Imaging, Magnetic resonance imaging) image, pass through collection
The change of H NMR spectroscopy signal and high quality MRI image is qualitative and rational judgment displacement progress and Flooding Efficiency.
As specific embodiment, in the step S5, the Flooding Efficiency is that displacement efficiency is more than 70%.
As specific embodiment, in the step S5, the described pair of data recorded and image are handled, and it includes being directed to
The real-time H NMR spectroscopy and high quality MRI image of methane, the real-time H NMR spectroscopy signal intensity situation at more each moment, observation spectrogram distribution
Dynamic change, analyze the process of displacement, while by MRI imagings come rational judgment displacement position and effect.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to compared with
The present invention is described in detail good embodiment, it will be understood by those within the art that, can be to the skill of the present invention
Art scheme is modified or equivalent substitution, and without departing from the objective and scope of technical solution of the present invention, it all should cover at this
Among the right of invention.
Claims (5)
1. macrovoid coal and rock carbon dioxide displacement gas process dynamics analysis method, it is characterised in that use in the method
A kind of macrovoid coal and rock carbon dioxide displacement gas process dynamics analytical equipment, the macrovoid coal and rock carbon dioxide flooding
Include for gas process dynamics analytical equipment：
Hollow annular holder body (1), the side surface of the clamp body (1) are enclosed provided with heat-insulation layer (2), the insulation
The component side surface of layer (2) is enclosed provided with malcoils (3)；
Hollow annular gum cover (4), the cavity top of the annular gum cover (4) are provided with the cavity of the clamp body (1)
It is provided with provided with the cavity bottom with the close-fitting top end of cavity inner wall (5), the annular gum cover (4) close with cavity inner wall
The lower top (6) coordinated, inwall, top end (5) and the lower top (6) of the annular gum cover (4) are surrounded by place and treated jointly
Survey the space of coal and rock test specimen (100)；
The cavity top of the annular gum cover (4) is provided with the upper plug head (7) contacted with top end (5), the annular gum cover (4)
Cavity bottom is provided with the lower end cap (8) contacted with lower top (6), and the upper end of the annular gum cover (4) is additionally provided with annular gum cover
(4) with the upper hermetic collar (9) of upper plug head (7) tight clamping fit, the lower end of the annular gum cover (4) is additionally provided with annular gum cover
(4) with the lower hermetic collar (10) of lower end cap (8) tight clamping fit, the lower end cap (8), which is provided with, covers lower end cap (8) bottom
It is located at the lower end cap fixing end (11) of clamp body (1) lower surface, the top side surface of the upper plug head (7) is enclosed provided with will be upper
Plug (7) is fixed on the upper plug head sealed end (12) on clamp body (1) top, is passed through on the top end (5) and upper plug head (7)
It is logical to be provided with displacement inlet pipe (13), penetrate to go out provided with displacement in the lower top (6), lower end cap (8) and lower end cap fixing end (11)
Manage (14), zone of heating (15), the zone of heating (15), clamper sheet are embedded with the cavity inner wall of the clamp body (1)
Between the cavity inner wall and upper plug head sealed end (12) and the upper plug head (7) of body (1), annular gum cover (4) and lower end cap (8) altogether
With one annular confined pressure chamber (16) of composition；
The top of the clamp body (1) is provided with the oil inlet pipe (17) connected with confined pressure chamber (16) and connected with zone of heating (15)
Logical zone of heating flowline (18), the bottom of the clamp body (1) are provided with the oil discharge pipe connected with confined pressure chamber (16)
(19) the zone of heating oil inlet pipe (20) and with zone of heating (15) connected, and the bottom of the clamp body (1) is additionally provided with data
Wire terminal (21) and the temperature sensor (22) for detecting confined pressure chamber (16) interior temperature；
This method comprises the following steps：
S1, the inwall that coal and rock test specimen (100) to be measured is put into the annular gum cover (4), top end (5) and lower top (6) are altogether
In the same space surrounded, the data cable connector (21) for collecting relevant parameter is connected, and seal and fix the macrovoid coal
Rock mass carbon dioxide displacement gas process dynamics analytical equipment；
S2, confined pressure in the confined pressure chamber (16) is set as 0~25MPa, temperature is 0~100 DEG C, the coal and rock examination to be measured
The axle pressure of part (100) is 0~60KN, and the displacement pressure in the displacement inlet pipe (13) is 0~22MPa, the displacement outlet pipe
(14) displacement pressure in is 0~22MPa；
S3, the entrance injection methane gas from the displacement inlet pipe (13), make coal and rock test specimen (100) to be measured reach adsorption saturation
State, then displacement inlet pipe (13) entrance inject carbon dioxide, due to including1H、3He、13C、19F、31P and129Including Xe
The powered reason of atomic nucleus, there is spin angular momentaum, nuclear magnetic resonance occurs under magnetic state, using NMR to first
Hydrogen atom sensitiveness in alkane is high and the characteristic insensitive to carbon dioxide, passes through NMR imaging and T2Spectrogram analyzes titanium dioxide
The dynamic process of carbon displacement methane；
Gas pressure and gas flow in S4, the monitoring displacement inlet pipe (13) and displacement outlet pipe (14), are recorded by computer
Import and export gas pressure and rate of discharge, T2Spectrogram and cross-sectional image；
S5, the experimental program according to setting, after the Flooding Efficiency of setting is reached, the data and image of record are handled,
Obtain gas DYNAMIC DISTRIBUTION feature in the internal displacement process of coal and rock test specimen (100) to be measured under different condition.
2. macrovoid coal and rock carbon dioxide displacement gas process dynamics analysis method according to claim 1, its feature
It is, in the step S2, the confined pressure in the confined pressure chamber (16) is 20MPa, and temperature is 80 DEG C, the coal and rock examination to be measured
The axle pressure of part (100) is 50KN, and the displacement pressure in the displacement inlet pipe (13) is 20MPa, in the displacement outlet pipe (14)
Displacement pressure is 20MPa.
3. macrovoid coal and rock carbon dioxide displacement gas process dynamics analysis method according to claim 1, its feature
It is, it is described to pass through NMR imaging and T in the step S32Spectrogram analyzes the dynamic process of carbon dioxide displacement methane, its
Including collection H NMR spectroscopy and high quality MRI image in real time, the change by gathering H NMR spectroscopy signal and high quality MRI image it is qualitative and
Rational judgment displacement progress and Flooding Efficiency.
4. macrovoid coal and rock carbon dioxide displacement gas process dynamics analysis method according to claim 1, its feature
It is, in the step S5, the Flooding Efficiency is that displacement efficiency is more than 70%.
5. macrovoid coal and rock carbon dioxide displacement gas process dynamics analysis method according to claim 1, its feature
Be, in the step S5, the data and image of described pair of record are handled, it include real-time H NMR spectroscopy for methane with
High quality MRI image, the real-time H NMR spectroscopy signal intensity situation at more each moment, the dynamic change of observation spectrogram distribution, analysis are driven
The process replaced, while by MRI imagings come rational judgment displacement position and effect.
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| CN109959672B (en) * | 2017-12-22 | 2021-06-15 | 中国石油大学(北京) | Quantitative evaluation method for carbon dioxide replacement of shale methane and application thereof |
| CN112255253A (en) * | 2020-10-30 | 2021-01-22 | 西南石油大学 | High-temperature high-pressure large-scale oil-water displacement dynamic X-ray scanning experimental device |
| CN114776251B (en) * | 2022-04-22 | 2023-11-03 | 重庆大学 | Method for reinforcing and sealing up exhausted shale oil and gas reservoir carbon dioxide |
| CN117823099B (en) * | 2024-03-05 | 2024-05-10 | 西南石油大学 | Carbon dioxide displacement of reservoir oil and sealing tool |
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| US7567079B2 (en) * | 2007-06-08 | 2009-07-28 | University Of New Brunswick | Methods suitable for measuring capillary pressure and relative permeability curves of porous rocks |
| CN101458218B (en) * | 2008-12-28 | 2011-02-02 | 大连理工大学 | Carbon dioxide oil-displacing nmr imaging detection device |
| CN102507626A (en) * | 2011-10-10 | 2012-06-20 | 北京大学 | Rock core holder compatible with nuclear magnetic resonance |
| CN105181728B (en) * | 2015-07-24 | 2017-07-07 | 中国石油天然气股份有限公司 | Method for online detection of shale gas by nuclear magnetic resonance |
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