CN209132138U - A kind of experimental provision of supercritical carbon dioxide high temperature and pressure PVT test and displacement methane integral - Google Patents
A kind of experimental provision of supercritical carbon dioxide high temperature and pressure PVT test and displacement methane integral Download PDFInfo
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- CN209132138U CN209132138U CN201822025478.6U CN201822025478U CN209132138U CN 209132138 U CN209132138 U CN 209132138U CN 201822025478 U CN201822025478 U CN 201822025478U CN 209132138 U CN209132138 U CN 209132138U
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 184
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 93
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 92
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 84
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 38
- 238000012360 testing method Methods 0.000 title claims abstract description 17
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 35
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 229960004424 carbon dioxide Drugs 0.000 claims description 88
- 239000011435 rock Substances 0.000 claims description 31
- 238000002474 experimental method Methods 0.000 claims description 23
- 239000011521 glass Substances 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 12
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 9
- 229910052708 sodium Inorganic materials 0.000 claims description 9
- 239000011734 sodium Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000012856 packing Methods 0.000 claims description 5
- 229910002090 carbon oxide Inorganic materials 0.000 claims description 2
- 150000001335 aliphatic alkanes Chemical class 0.000 claims 1
- 239000007789 gas Substances 0.000 description 11
- 239000012530 fluid Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 239000003208 petroleum Substances 0.000 description 4
- 230000002000 scavenging effect Effects 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- 241000009298 Trigla lyra Species 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000010494 opalescence Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000005325 percolation Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model relates to a kind of supercritical carbon dioxide high temperature and pressure PVT test and the experimental provisions of displacement methane integral, the device includes liquid carbon dioxide storage tank, liquid methane storage tank, positive displacement pump, core holding unit, constant temperature oil bath system, PVT, ring pressure generating apparatus, differential pressure pickup, flow sensor, pressure sensor, temperature sensor, sodium hydroxide absorbs storage tank, air accumulator, liquid carbon dioxide storage tank and liquid methane storage tank are respectively by the first pipeline, second pipeline is connected to PVT entrances by third pipeline, PVT outlets connect the entrance of core holding unit by the 4th pipeline, manifold threeway passes through the 5th pipeline, 6th pipeline, 7th pipeline is separately connected the outlet of core holding unit, the entrance of sodium hydroxide storage tank, third pipeline, the outlet of sodium hydroxide storage tank passes through the 8th pipe Line connects air accumulator.This reality utility model can study phase, viscosity and the displacement efficiency of supercritical carbon dioxide at high temperature under high pressure with the changing rule of temperature, pressure.
Description
Technical field
The utility model belongs to unconventional oil and gas yield-increasing technology field, and in particular to a kind of supercritical carbon dioxide high temperature is high
Press the experimental provision of PVT test and displacement methane integral.
Background technique
Under the form of current energy shortage, develop new technology, the prospecting development efficiency for effectively improving petroleum resources becomes
The hot spot of people's research and development.Supercritical carbon dioxide had both had the low viscosity and easy diffusivity of gas, it may have the high density of liquid
The good feature with dissolubility, is based on the micro-nano pore media of unconventional gas reservoir, and supercritical carbon dioxide is a kind of novel
The method of high-efficiency mining natural gas improves gas recovery factor using supercritical carbon dioxide and is conducive to alleviate natural gas supply pressure
Power is advantageously implemented green energy resource exploitation, realizes low-carbon economy.
Currently, general PVT observation substance phases presence are not easy to observe, lack picture pick-up device, can not accurate recording surpass
The phase Characteristics of critical carbon dioxide, using heating water bath, it is difficult to the problems such as being heated to 100 DEG C or more.Supercritical carbon dioxide
Viscosity test experiment, the experiment of supercritical carbon dioxide displacement Experiment of Methane, PVT observation supercritical carbon dioxides are all independent
It carries out, results in waste of resources, and cumbersome, above-mentioned experiment can be completed by not occurring a kind of multifunction experiment apparatus.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of supercritical carbon dioxide high temperature and pressure PVT test and
The experimental provision of displacement methane integral can complete the experiment of supercritical carbon dioxide viscosity test, supercritical carbon dioxide
Displacement Experiment of Methane, PVT observation supercritical carbon dioxide experiments, it is vdiverse in function, save cost.
To achieve the above object, the technical solution that the utility model is taken are as follows:
The experimental provision of a kind of supercritical carbon dioxide high temperature and pressure PVT test and displacement methane integral, including liquid
Carbon dioxide storage tank, positive displacement pump, core holding unit, the first constant temperature oil bath system, the second constant temperature oil bath system, the raw dress of ring pressure
Set, differential pressure pickup and computer control system, core holding unit is equipped with upper inlet and outlet, further include liquid methane storage tank,
PVT, sodium hydroxide tourie and air accumulator, there is entrance and exit on PVT, hydroxide absorb sodium storage tank be equipped with entrance and
Outlet；It is connected with the first pipeline in the outlet of liquid carbon dioxide storage tank, the first needle-valve, liquid methane are installed on the first pipeline
It is connected with the second pipeline in the outlet of storage tank, the second needle-valve, the end of the first pipeline and the second pipeline are installed on the second pipeline
Joining distal ends after be connected with third pipeline, the end of third pipeline is connect with PVT entrances, from liquid two on third pipeline
Carbonoxide storage tank to PVT directions are sequentially installed with booster pump, heating system, temperature sensor, first pressure sensor and appearance
Product pump；The 4th pipeline is connected in PVT outlets, the end of the 4th pipeline and the entrance of core holding unit connect, the 4th pipe
The 5th needle-valve and first flow sensor are sequentially installed with from PVT to core holding unit direction on line；Core holding unit goes out
The 5th pipeline is connected on mouthful, and the end of the 5th pipeline is connected with manifold threeway, from core holding unit to manifold on the 5th pipeline
Threeway direction is sequentially installed with second flow sensor and vacuum pump；The one outlet of manifold threeway passes through the 6th pipeline and hydrogen-oxygen
Change the entrance connection for absorbing sodium storage tank, from manifold three passes to hydroxide on the 6th pipeline and absorb sodium storage tank direction and be sequentially installed with the
The outlet of three needle-valves and counterbalance valve, sodium hydroxide tourie is connected by the entrance of the 8th pipeline and air accumulator, on the 8th pipeline
Third flow sensor is installed；Another outlet of manifold threeway is connect by the 7th pipeline with third pipeline, the 7th pipeline
Tie point with third pipeline is equipped on the 7th pipeline between the first pipeline and the tie point and booster pump of third pipeline
4th needle-valve；PVT peripheries are covered with closed glass shell, between PVT outer walls and the inner wall of glass shell there are
The inner cavity of gap, glass shell is connect by pipeline with the first constant temperature oil bath system, and the first constant temperature oil bath system makes perseverance by pipeline
Warm oil enters in glass shell and then PVT is placed in constant temperature oil bath, and glass shell periphery is fixed with cloche, glass shell
Outer wall and cloche inner wall between there are gap and incandescent lamp and electronic camera are installed；Glue is installed in core holding unit
Cylinder, core holding unit are connected by the 9th pipeline with ring pressure generating apparatus, and the 4th pressure sensor, rock are equipped on the 9th pipeline
Heart clamp holder is placed in the second constant temperature oil bath system, and the inlet and exit of core holding unit are separately installed with second pressure biography
Sensor and third pressure sensor are equipped with differential pressure pickup, the temperature sensor, first pressure sensing on core holding unit
Device, second pressure sensor, third pressure sensor, counterbalance valve, the 4th pressure sensor, differential pressure pickup, first flow pass
Sensor, second flow sensor, third flow sensor, electronic camera are all connected to computer control system.
Preferably, first pipeline, the second pipeline, third pipeline, the 4th pipeline, the 5th pipeline, the 6th pipeline, the 7th
Pipeline, the 8th pipeline and the 9th pipeline are the steel pipe that internal diameter is less than 2mm, are laid with insulating layer on outer wall of steel pipe.
Preferably, the 4th needle-valve is located at the end of the 7th pipeline and third pipeline tie point direction.
The utility model is outer equipped with incandescent lamp and camera at PVT, can more easily observe supercritical carbon dioxide
Phase Characteristics, obtain clearly opalescence phenomenon image, can also recorded video, so that preferably observation supercritical carbon dioxide exists
Different pressures, at a temperature of phase-state change, all data measured can measure supercritical carbon dioxide under the state using formula
Density, viscosity；Using constant temperature oil bath system, heating is rapider, temperature can be risen to 100 DEG C or more, Observable range is more
Extensively, carbon dioxide is more preferably simulated in the state of underground；By measuring viscosity for PVT and two kinds of sides of viscosity can be measured by rock core
The comparison of method, the percolation law for studying different rock cores deviate the degree of Darcy's law；Also it can use computer control system to draw
Supercritical carbon dioxide processed, methane, supercritical carbon dioxide and methane mixed gas adsorption isothermal curve, DATA REASONING is quasi-
Really, and the utility model is vdiverse in function, integrated design, saves cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the cloche assembling structure schematic diagram of the utility model；
In figure, 1- liquid carbon dioxide storage tank, 2- liquid methane storage tank, the first needle-valve of 3a-, the second needle-valve of 3b-, 3c-
Three needle-valves, the 4th needle-valve of 3d-, the 5th needle-valve of 3e-, 4- booster pump, 5- heating system, 6- temperature sensor, 7- first pressure pass
Sensor, 8- positive displacement pump, 9-PVT, 10- first flow sensor, 11- second pressure sensor, 12- third pressure sensor,
13- differential pressure pickup, 14- rock core, 15- second flow sensor, 16- vacuum pump, 17- manifold threeway, 18- counterbalance valve, 19-
Three flow sensors, 20- ring pressure generating apparatus, 21- sodium hydroxide tourie, 22- air accumulator, 23- the first constant temperature oil bath system,
24- the second constant temperature oil bath system, 25- core holding unit, 26- glue bucket, 27- computer control system, the 4th pressure sensing of 28-
Device, 29- glass shell, 30- cloche, 31- incandescent lamp, 32- electronic camera, 33- petroleum pipeline, 34- oil return pipe, 35- circulation
Pump, the first pipeline of G1-, the second pipeline of G2-, G3- third pipeline, the 4th pipeline of G4-, the 5th pipeline of G5-, the 6th pipeline of G6-,
The 7th pipeline of G7-, the 8th pipeline of G8-, the 9th pipeline of G9-.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing.
As shown in Figure 1 and Figure 2, a kind of supercritical carbon dioxide high temperature and pressure PVT test and the experiment of displacement methane integral
Device, including liquid carbon dioxide storage tank 1, positive displacement pump 8, core holding unit 25, the first constant temperature oil bath system 23, the second thermostatical oil
Bath system 24, ring pressure generating apparatus 20, differential pressure pickup 13 and computer control system 27, computer control system 27 are existing
Technology, core holding unit 25 are equipped with upper inlet and outlet, further include liquid methane storage tank 2, PVT cylinder 9, sodium hydroxide tourie 21
With air accumulator 22, PVT use BDR mercury-free PVT in the prior art, there is entrance and exit on PVT cylinder 9, and hydroxide absorbs
Sodium storage tank 21 is equipped with entrance and exit, is connected with the first pipeline G1, the first pipeline G1 in the outlet of liquid carbon dioxide storage tank 1
On the first needle-valve 3a is installed, be connected in the outlet of liquid methane storage tank 2 on second pipeline G2, the second pipeline G2 and be equipped with
Third pipeline G3, the end of third pipeline G3 are connected with after the joining distal ends of two needle-valve 3b, the first pipeline G1 and the second pipeline G2
It is connect with the entrance of PVT cylinder 9, from liquid carbon dioxide storage tank 1 to PVT, 9 direction of cylinder is sequentially installed with pressurization on third pipeline G3
Pump 4, heating system 5, temperature sensor 6, first pressure sensor 7 and positive displacement pump 8, liquid carbon dioxide storage tank 1 is for storing
Carbon dioxide, the first needle-valve 3a are used to control the outflow of carbon dioxide in liquid carbon dioxide storage tank 1, and liquid methane storage tank 2 is used
In storing methane, the second needle-valve 3b is used to control the outflow of methane in liquid methane storage tank 2, and booster pump 4 is for increasing titanium dioxide
The pressure of carbon makes its temperature reach experiment desirable value, positive displacement pump 8 to desirable value, heating system 5 is tested for heating carbon dioxide
For adjusting the speed for injecting carbon dioxide or methane to PVT cylinder 9 or core holding unit 25, temperature sensor 6 and first pressure
Sensor 7 is for measuring temperature and pressure in third pipeline G3.The 4th pipeline G4, the 4th pipeline are connected in the outlet of PVT cylinder 8
The end of G4 is connect with the entrance of core holding unit 25, is successively pacified on the 4th pipeline G4 from PVT cylinder 8 to 25 direction of core holding unit
Equipped with the 5th needle-valve 3e and first flow sensor 10, the 5th needle-valve 3e is for controlling fluid flow out, first flow sensor 10
The flow of rock core is flowed through for measuring carbon dioxide, supercritical carbon dioxide or methane.It is connected in the outlet of core holding unit 25
There is a 5th pipeline G5, the end of the 5th pipeline G5 is connected with manifold threeway 17, from core holding unit to manifold on the 5th pipeline G5
Threeway direction is sequentially installed with second flow sensor 15 and vacuum pump 16, and the 5th pipeline is flowed through in the measurement of second flow sensor 15
The fluid flow of G5, vacuum pump 16 are used to exclude the gas in experiment pipeline.The one outlet of manifold threeway 17 passes through the 6th pipe
Line G6 is connect with the entrance that hydroxide absorbs sodium storage tank 21, is passed to hydroxide from manifold three on the 6th pipeline G6 and is absorbed sodium storage tank side
To third needle-valve 3c and counterbalance valve 18 is sequentially installed with, third needle-valve 3c is used for the flow direction of fluid in control piper, counterbalance valve 18
So that the output fluid stability of flow in pipeline.Another outlet of manifold threeway 17 passes through the 7th pipeline G7 and third pipeline G3
The tie point of connection, the 7th pipeline G7 and third pipeline G3 are located at the tie point and booster pump of the first pipeline G1 and third pipeline G3
Between 4, the 4th needle-valve 3d is installed on the 7th pipeline G7, the 4th needle-valve is located at the 7th pipeline and third pipeline tie point direction
End.The outlet of sodium hydroxide tourie 21 is connect by the 8th pipeline G8 with the entrance of air accumulator 22, is pacified on the 8th pipeline G8
Equipped with third flow sensor 19, sodium hydroxide tourie 21 is used for absorbing carbon dioxide, and air accumulator is in stocking system
Fluid, third flow sensor 19 is for measuring the fluid flow for flowing through the 8th pipeline G8.9 periphery of PVT cylinder is covered with closed glass
Glass shell 29, there are gap between the outer wall of PVT cylinder 9 and the inner wall of glass shell 29, glass shell is close to PVT outlets one
End is connect by petroleum pipeline 33 with the first constant temperature oil bath system 23, circulating pump 35 is equipped on petroleum pipeline 33, glass shell is close
PVT entrance one end is connect by oil return pipe 34 with the first constant temperature oil bath system 23, and the first constant temperature oil bath system 23 passes through defeated
Oil pipe 33 and oil return pipe 34 and circulating pump 35 enter thermostatical oil in glass shell circulate and then by PVT be placed in perseverance
In warm oil bath, glass shell periphery is fixed with cloche 30, and there are gaps between the outer wall of glass shell and the inner wall of cloche
And incandescent lamp 31 and electronic camera 32 are installed, electronic camera is for shooting supercritical carbon dioxide picture and being transferred to calculating
Machine control system, to observe the phase Characteristics of supercritical carbon dioxide.Packing element 26, rock core 14 are installed in core holding unit 25
It is placed in packing element, core holding unit 25 is connected by the 9th pipeline G9 with ring pressure generating apparatus 20, is equipped on the 9th pipeline G9
4th pressure sensor 28, ring pressure generating apparatus 20 are used to provide ring pressure for core holding unit 25, make packing element 26 be close to rock core with
The contact surface of sealing rock core 14 and packing element 26 avoids flow media from directly being altered from input end in an experiment to outlet end, guarantees flowing
Axial direction flowing of the medium along rock core 14.Core holding unit 25 is placed in the second constant temperature oil bath system 24, the entrance of core holding unit
Place and exit are separately installed with second pressure sensor 11 and third pressure sensor 12, are equipped with pressure difference on core holding unit
Sensor 13, second pressure sensor 11 and third pressure sensor 12 are respectively used to the entrance of measurement core holding unit 25 and go out
Pressure at mouthful, differential pressure pickup 13 are used to measure the flow pressure drop that flow media flows through the generation of rock core 14, can measure rock core 14
Pressure difference between upper difference pressure tap.Temperature sensor, first pressure sensor, second pressure sensor, third pressure sensing
Device, counterbalance valve, the 4th pressure sensor, differential pressure pickup, first flow sensor, second flow sensor, third flow pass
Sensor, electronic camera are all connected to computer control system.
First pipeline, the second pipeline, third pipeline, the 4th pipeline, the 5th pipeline, the 6th pipeline, the 7th pipeline, the 8th pipe
Line and the 9th pipeline are the steel pipe that internal diameter is less than 2mm, are laid with insulating layer on outer wall of steel pipe.
The utility model be used for supercritical carbon dioxide high temperature and pressure PVT test experiments when, concrete operation method according to
Lower step:
By optical effect of the observation supercritical carbon dioxide in PVT obtain its different pressures, at a temperature of phase
State feature, and calculate the density of supercritical carbon dioxide, viscosity；The pressure of rock core generation is crossed by measuring stream of supercritical carbon dioxide
Drop, calculates its viscosity in porous media
(A), the first needle-valve 3a is adjusted, the second needle-valve 3b is in close state, third needle-valve 3c, the 4th needle-valve 3d, the 5th
Needle-valve 3e is in the open state, and positive displacement pump 8 is in inactive state, and positive displacement pump 8 and test pipeline are connection at this time, using true
Sky pump 16 excludes the gas in experiment pipeline；
(B), the second needle-valve 3b, third needle-valve 3c, the 4th needle-valve 3d, the 5th needle-valve 3e are closed, the first needle-valve 3a is opened, opens
Dynamic positive displacement pump 8, flows out liquid carbon dioxide by liquid carbon dioxide storage tank 1, and it is permanent to adjust booster pump 4, heating system 5, first
Warm oil bath system 23, the second constant temperature oil bath system 24, are adjusted to temperature, the pressure in experimental system that carbon dioxide to be made to become gas
Temperature needed for state, pressure；
(C), ring pressure generating apparatus 20 is opened, the pressure of ring pressure generating apparatus is adjusted, keeps it more aobvious than first pressure sensor
High 2~the 5Mpa of the pressure shown；
(D), the first needle-valve 3a, the second needle-valve 3b, third needle-valve 3c are closed, the 4th needle-valve 3d, the 5th needle-valve 3e are opened, is led to
Overregulate positive displacement pump 8 make carbon dioxide with given pace along pipeline flow through rock core after experiment pipeline in recycle, to second pressure
Sensor 11, third pressure sensor 12 stable reading after, record its numerical value；Gaseous carbon dioxide is in temperature, pressure
Under viscosity it is known that therefore can according to Darcy's law calculate rock core absolute permeability:
In formula, K- rock core absolute permeability；Q0Carbon dioxide volume flow under atmospheric pressure；P0Atmospheric pressure；μ0It is real
Test the viscosity of the gaseous carbon dioxide under the conditions of temperature, pressure, L0Rock core length, A- rock core end area；P1、P2It is respectively rock core
The pressure of clamper inlet and exit；
(E), third needle-valve 3c, the 5th needle-valve 3e are opened, the first needle-valve 3a, the second needle-valve 3b, the 4th needle-valve 3d is closed, opens
Dynamic positive displacement pump 8, makes the carbon dioxide in system flow to sodium hydroxide tourie 21 along pipeline；
(F), the second needle-valve 3b, third needle-valve 3c, the 4th needle-valve 3d, the 5th needle-valve 3e are closed, the first needle-valve 3a is opened, opens
Dynamic positive displacement pump 8, flows out liquid carbon dioxide by liquid carbon dioxide storage tank, adjusts booster pump 4, heating system 5, the first constant temperature
The pressure of experimental system, temperature are adjusted to more than carbon dioxide critical point by oil bath system 23, the second constant temperature oil bath system 24
It tests setting value (7.38Mpa, 31.1 DEG C), guarantees that carbon dioxide reaches supercriticality；
(G), it after temperature, the pressure that temperature sensor 6, first pressure sensor 7 are shown reach experiment setting value, closes
First needle-valve 3a；Ring pressure generating apparatus 20 is opened, the pressure of ring pressure generating apparatus is adjusted, keeps it more aobvious than first pressure sensor 7
High 2~the 5Mpa of the pressure shown；
(H), the first needle-valve 3a, the second needle-valve 3b, third needle-valve 3c, the 4th needle-valve 3d, the 5th needle-valve 3e are closed, tune is passed through
Section positive displacement pump 8 makes supercritical carbon dioxide flow into PVT cylinder 9 through third pipeline G3 with given pace, to metal closures number in PVT cylinder 8
After value is stablized, the photo of shooting is transmitted to computer control system 27 by electronic camera 32, observes supercritical carbon dioxide
Phase Characteristics, and the density of supercritical carbon dioxide, viscosity are calculated, supercritical carbon dioxide density is calculated, formula is as follows:
y0=1.0151-0.2873Tr -3.33-0.0855Tr -6.66-0.2077Tr -9.99
y1=1.0387-1.3784Tr -4.66+0.5800Tr -9.32+0.0900Tr -13.98
y2=1.0677-1.6632Tr -4.66+1.8662Tr -8.92-0.7218Tr -13.98
y3=1.1541-0.8172Tr -4.04+1.1726Tr -8.08-0.5099Tr -12.12
In formula: TrCompare temperature；P-pressure, unit Mpa；R-universal gas constant,
ρ-density, units/kg/m3；MgThe molecular weight of-carbon dioxide, 44kg/kmol；Z-compressibility factor, T-supercritical carbon dioxide
Temperature, unit DEG C；
Supercritical carbon dioxide viscosity is calculated, formula is as follows:
μ0ξ=34.0 × 10-5Tr 0.94Tr≤1.5
In formula: ρr- reduced density；Tpc- critical-temperature, K；ppc- critical pressure, unit Mpa；μ-viscosity, unit
mpa/s；ρpc- critical density, 467.6kg/m3；
(I) the first needle-valve 3a, the second needle-valve 3b, third needle-valve 3c are closed, the 4th needle-valve 3d, the 5th needle-valve 3e are opened, is led to
Overregulate positive displacement pump 8 make supercritical carbon dioxide with given pace along pipeline flow through rock core after experiment pipeline in recycle, wait press
Gap sensor 13, first flow sensor 10 stable reading after, record its numerical value；Since the absolute permeability of rock core has been counted
It obtains, therefore viscosity of the supercritical carbon dioxide in the porous media of stratum can be calculated according to Darcy's law:
In formula, the viscosity of μ-supercritical carbon dioxide at high temperature under high pressure；Pressure difference between Δ P- pressure tap；K- rock core
Absolute permeability；The flow velocity of V- supercritical carbon dioxide；The distance between L- pressure tap；
(J) by adjusting booster pump 4, heating system 5, positive displacement pump 8, the reading of differential pressure pickup 13 is recorded, research is super to face
The phase of boundary's carbon dioxide and the viscosity with temperature of supercritical carbon dioxide, pressure, flow velocity changing rule；Record first flow
Sensor, the isothermal adsorption that the numerical value of second flow sensor draws supercritical carbon dioxide by computer control system are bent
Line.
By changing temperature, the pressure of experimental system, different temperature is studied, pressure imitates supercritical carbon dioxide optics
The influence answered.
By changing temperature, the pressure of experimental system, overcritical titanium dioxide under PVT research different temperatures, pressure is utilized
Density, the viscosity of carbon.
By the comparison for measuring viscosity by PVT and measuring two methods of viscosity by rock core, the infiltration of different rock cores is studied
Stream rule deviates the degree of Darcy's law.
When the utility model is used for the experiment of supercritical carbon dioxide displacement methane, concrete operation method is according to following step
It is rapid:
Measurement stream of supercritical carbon dioxide crosses the flow volume of rock core, calculates its scavenging efficiency in more empty media
(a), the first needle-valve 3a is adjusted, the second needle-valve 3b is in close state, third needle-valve 3c, the 4th needle-valve 3d, the 5th
Needle-valve 3e is in the open state, and positive displacement pump 8 is in non-open state, excludes the gas in pipeline using vacuum pump 16, replaces rock
Rock core in heart clamp holder；
(b), the second needle-valve 3b is opened, the first needle-valve 3a, third needle-valve 3c, the 4th needle-valve 3d, the 5th needle-valve 3e is closed, opens
Dynamic positive displacement pump 8 makes methane by flowing out in liquid methane storage tank 1, adjusts booster pump 4, heating system 5, the first constant temperature oil bath system
23, the second constant temperature oil bath system 24, is adjusted to experiment setting value i.e. carbon dioxide for the pressure of experimental system, temperature and reaches super to face
31.1 DEG C of pressure 7.38Mpa when boundary's state, temperature；
(c), it after temperature, the pressure that temperature sensor 6, first pressure sensor 7 are shown reach experiment setting value, opens
Ring pressure generating apparatus 20 adjusts the pressure of ring pressure generating apparatus, and the pressure for showing that it than first pressure sensor is high by 2~
5Mpa；
(d), the first needle-valve 3a, third needle-valve 3c, the 4th needle-valve 3d are closed, the second needle-valve 3b, the 5th needle-valve 3e are opened, is adjusted
Whole positive displacement pump 8 makes methane flow through rock core along pipeline with given pace, and saturated core is for 24 hours；To first flow sensor 10, second
After 15 numerical stability of quantity sensor, computer control system records first flow sensor 10, second flow sensor 15 at any time
Between the m that changes3/ s-t curve graph calculates the flow volume V for passing through first flow sensor1, second flow sensor flow body
Product V2；
(e), the first needle-valve 3a, third needle-valve 3c, the 5th needle-valve 3e are opened, the second needle-valve 3b, the 4th needle-valve 3e is closed, opens
Dynamic positive displacement pump 8 makes carbon dioxide by flowing out in liquid carbon dioxide storage tank 1, adjusts booster pump 4, heating system 5, the first constant temperature
The pressure of experimental system, temperature are adjusted to be more than carbon dioxide critical point by oil bath system 23 and the second constant temperature oil bath system 24
Experiment setting value 7.38Mpa, 31.1 DEG C, guarantee that carbon dioxide reaches supercriticality；
(f), volume adjusted pump 8 makes supercritical carbon dioxide flow through rock core along pipeline with given pace, starts displacement test,
The m that computer control system record third flow sensor 19 changes over time3/ s-t curve graph is calculated and is passed by third flow
The flow volume V of sensor 193, scavenging efficiency can be calculated according to the following formula:
VRock=V1-V2；
VIt drives=V3-V2；
In formula, VRockThe flow volume of rock core saturation methane；V1Pass through the methane flow volume of first flow sensor；V2-
By the methane flow volume of second flow sensor, i.e., methane flow volume in pipeline；V3By third flow sensor
Methane flow volume；VIt drivesThe methane flow volume that displacement goes out；γ-displacement efficiency.
By changing temperature, the pressure of experimental system, different temperature, pressure are studied to supercritical carbon dioxide in high temperature
The influence of scavenging efficiency under high pressure.
By changing the flow velocity of supercritical carbon dioxide, the flow velocity of supercritical carbon dioxide is studied to supercritical carbon dioxide
The influence of scavenging efficiency at high temperature under high pressure.
By record first flow sensor, the numerical value of second flow sensor, drawn by computer control system super
Critical carbon dioxide, methane, supercritical carbon dioxide and methane mixed gas adsorption isothermal curve.
Claims (3)
1. the experimental provision of a kind of supercritical carbon dioxide high temperature and pressure PVT test and displacement methane integral, including liquid two
Carbonoxide storage tank, positive displacement pump, core holding unit, the first constant temperature oil bath system, the second constant temperature oil bath system, ring pressure generating apparatus,
Differential pressure pickup and computer control system, core holding unit are equipped with upper inlet and outlet, it is characterised in that: further include liquid first
Alkane storage tank, PVT, sodium hydroxide tourie and air accumulator have entrance and exit on PVT, and hydroxide absorbs to be set on sodium storage tank
There is entrance and exit；It is connected with the first pipeline in the outlet of liquid carbon dioxide storage tank, the first needle-valve is installed on the first pipeline,
Be connected with the second pipeline in the outlet of liquid methane storage tank, the second needle-valve be installed on the second pipeline, the end of the first pipeline and
Third pipeline is connected with after the joining distal ends of second pipeline, the end of third pipeline is connect with PVT entrances, on third pipeline
From liquid carbon dioxide storage tank to PVT, a direction is sequentially installed with booster pump, heating system, temperature sensor, first pressure and passes
Sensor and positive displacement pump；The 4th pipeline is connected in PVT outlets, the end of the 4th pipeline and the entrance of core holding unit connect
It connects, is sequentially installed with the 5th needle-valve and first flow sensor from PVT to core holding unit direction on the 4th pipeline；Rock core folder
The 5th pipeline is connected in the outlet of holder, the end of the 5th pipeline is connected with manifold threeway, clamps on the 5th pipeline from rock core
Device to manifold threeway direction is sequentially installed with second flow sensor and vacuum pump；The one outlet of manifold threeway passes through the 6th pipe
Line is connect with the entrance that hydroxide absorbs sodium storage tank, is passed to hydroxide from manifold three on the 6th pipeline and is absorbed sodium storage tank direction successively
Third needle-valve and counterbalance valve are installed, the outlet of sodium hydroxide tourie is connected by the entrance of the 8th pipeline and air accumulator, the
Third flow sensor is installed on eight pipelines；Another outlet of manifold threeway is connect by the 7th pipeline with third pipeline,
The tie point of 7th pipeline and third pipeline is between the first pipeline and the tie point and booster pump of third pipeline, the 7th pipeline
On the 4th needle-valve is installed；PVT peripheries are covered with closed glass shell, the inner wall of PVT outer walls and glass shell it
Between there are gap, the inner cavity of glass shell is connect by pipeline with the first constant temperature oil bath system, and the first constant temperature oil bath system passes through
Pipeline enters thermostatical oil in glass shell and then PVT is placed in constant temperature oil bath, and glass shell periphery is fixed with cloche,
There are gap and incandescent lamp and electronic camera are installed between the outer wall of glass shell and the inner wall of cloche；In core holding unit
Packing element is installed, core holding unit is connected by the 9th pipeline with ring pressure generating apparatus, is equipped with the 4th pressure on the 9th pipeline
Sensor, core holding unit are placed in the second constant temperature oil bath system, and the inlet and exit of core holding unit are separately installed with
Second pressure sensor and third pressure sensor are equipped with differential pressure pickup, the temperature sensor, on core holding unit
One pressure sensor, second pressure sensor, third pressure sensor, counterbalance valve, the 4th pressure sensor, differential pressure pickup,
First flow sensor, second flow sensor, third flow sensor, electronic camera are all connected to computer control system
System.
2. supercritical carbon dioxide high temperature and pressure PVT test according to claim 1 and the experiment of displacement methane integral
Device, it is characterised in that: first pipeline, the second pipeline, third pipeline, the 4th pipeline, the 5th pipeline, the 6th pipeline,
Seven pipelines, the 8th pipeline and the 9th pipeline are the steel pipe that internal diameter is less than 2mm, are laid with insulating layer on outer wall of steel pipe.
3. the reality of supercritical carbon dioxide high temperature and pressure PVT test according to claim 1 or 2 and displacement methane integral
Experiment device, it is characterised in that: the 4th needle-valve is located at the end of the 7th pipeline and third pipeline tie point direction.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109269962A (en) * | 2018-12-04 | 2019-01-25 | 郑州大学 | The experimental provision and method of a kind of supercritical carbon dioxide high temperature and pressure PVT test and displacement methane integral |
| CN116411896A (en) * | 2023-06-07 | 2023-07-11 | 太原理工大学 | Phase state identification device and method for exploiting coalbed methane by supercritical carbon dioxide displacement |
-
2018
- 2018-12-04 CN CN201822025478.6U patent/CN209132138U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109269962A (en) * | 2018-12-04 | 2019-01-25 | 郑州大学 | The experimental provision and method of a kind of supercritical carbon dioxide high temperature and pressure PVT test and displacement methane integral |
| CN109269962B (en) * | 2018-12-04 | 2024-02-13 | 郑州大学 | Supercritical carbon dioxide high-temperature high-pressure PVT test and displacement methane integrated experimental device and method |
| CN116411896A (en) * | 2023-06-07 | 2023-07-11 | 太原理工大学 | Phase state identification device and method for exploiting coalbed methane by supercritical carbon dioxide displacement |
| CN116411896B (en) * | 2023-06-07 | 2023-08-18 | 太原理工大学 | Phase state identification device and method for exploiting coalbed methane by supercritical carbon dioxide displacement |
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