CN114542019A - Unconventional reservoir fluid adsorption migration displacement simulation measuring device - Google Patents
Unconventional reservoir fluid adsorption migration displacement simulation measuring device Download PDFInfo
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 116
- 239000012530 fluid Substances 0.000 title claims abstract description 69
- 238000004088 simulation Methods 0.000 title claims abstract description 56
- 238000001179 sorption measurement Methods 0.000 title claims abstract description 19
- 230000005012 migration Effects 0.000 title claims abstract description 11
- 238000013508 migration Methods 0.000 title claims abstract description 11
- 239000003245 coal Substances 0.000 claims abstract description 46
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 39
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 238000000429 assembly Methods 0.000 claims abstract description 7
- 230000000712 assembly Effects 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 19
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 12
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 12
- 241001330002 Bambuseae Species 0.000 claims description 12
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 12
- 239000011425 bamboo Substances 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 12
- 238000005213 imbibition Methods 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 8
- 239000007791 liquid phase Substances 0.000 claims description 7
- 230000017105 transposition Effects 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 72
- 238000007599 discharging Methods 0.000 description 8
- 239000011435 rock Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/166—Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium
- E21B43/168—Injecting a gaseous medium
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/70—Combining sequestration of CO2 and exploitation of hydrocarbons by injecting CO2 or carbonated water in oil wells
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Abstract
The invention discloses a simulation measuring device for unconventional reservoir fluid adsorption migration displacement, which comprises: the displacement simulation carrier assembly is internally loaded with coal bodies, and two sides of the displacement simulation carrier assembly are respectively communicated with an upstream pipe and a downstream pipe; the two groups of air supply assemblies are respectively a first air supply assembly and a second air supply assembly, wherein the air supply end of the first air supply assembly is communicated to the upstream pipe, and the air supply end of the second air supply assembly is communicated to the downstream pipe; the confining pressure loading mechanism is used for applying confining pressure to the coal in the displacement simulation carrier assembly; a vacuum pump, the suction end of which is communicated to the downstream pipe; the gas collection end of the collection detection mechanism is communicated to the downstream pipe; and a displacement fluid supply assembly capable of supplying a fluid for displacement into the displacement simulation carrier assembly; and an upstream communicating pipe and a downstream communicating pipe are communicated between the upstream pipe and the downstream pipe, and an upstream communicating valve and a downstream communicating valve are arranged on the upstream communicating pipe and the downstream communicating pipe.
Description
Technical Field
The invention relates to the technical field of displacement simulation devices, in particular to a displacement simulation measuring device for adsorption and migration of unconventional reservoir fluid.
Background
Unconventional reservoirs such as coal bed gas reservoirs and shale gas reservoirs are obviously different from conventional gas reservoirs, the reservoir formation mode is adsorption reservoir formation, the reservoir formation is a low-porosity and low-permeability reservoir formation, and the gas reservoir recovery ratio is low. The injection of fluids such as CO2 and N2 into a coal seam (unconventional reservoir) has been proved to replace gas (natural gas resources) that cannot be recovered by a conventional drainage depressurization method, thereby improving the recovery efficiency of the gas (natural gas resources in the unconventional reservoir). Current experimental apparatus mostly is single function measuring device, and its whole experimental efficiency is lower, and the richness of experimental parameter is general. Moreover, the coal bed (unconventional reservoir) contains water, and in the process of extracting gas (gas resources in the coal bed), the water can move along with the flowing of the gas, so that the rule of mutual influence among rock, water and gas is not clear;
therefore, it is necessary to provide an unconventional reservoir fluid imbibition displacement simulation measuring device to solve the above problems.
Disclosure of Invention
In order to achieve the purpose, the invention provides the following technical scheme: unconventional reservoir fluid adsorption migration displacement simulation measuring device includes:
the displacement simulation carrier assembly is internally loaded with coal bodies, and two sides of the displacement simulation carrier assembly are respectively communicated with an upstream pipe and a downstream pipe;
the two groups of air supply assemblies are respectively a first air supply assembly and a second air supply assembly, wherein the air supply end of the first air supply assembly is communicated to the upstream pipe, and the air supply end of the second air supply assembly is communicated to the downstream pipe;
the confining pressure loading mechanism is used for applying confining pressure to the coal in the displacement simulation carrier assembly;
the suction end of the vacuum pump is communicated with the upstream and downstream pipes;
the gas collection end of the collection detection mechanism is communicated with the upstream pipe and the downstream pipe; and
a displacement fluid supply assembly capable of supplying a displacement fluid into the displacement simulation carrier assembly;
and an upstream communicating pipe and a downstream communicating pipe are communicated between the upstream pipe and the downstream pipe, and an upstream communicating valve and a downstream communicating valve are arranged on the upstream communicating pipe and the downstream communicating pipe.
Further, preferably, the gas supply assembly includes:
the air supply tank is a high-pressure air supply tank body;
the air supply pipe is provided with an air supply valve, one end of the air supply pipe is communicated with the air outlet end of the air supply tank, the other end of the air supply pipe is communicated to the upstream pipe;
the air supply pipes of the first air supply assembly and the second air supply assembly are communicated by adopting a differential pressure connecting pipe, the differential pressure connecting pipe is symmetrically provided with detection valves, and a differential pressure detector is arranged on the differential pressure connecting pipe between the two detection valves; and
and the compensating pipe is connected in parallel to the differential pressure connecting pipe and is provided with a mutual opening valve.
Further, preferably, the displacement simulation carrier assembly includes:
an outer bin body;
one side of the movable cylinder is in an open shape, and the other side of the movable cylinder is in a closed shape; and
one side of the positioning cylinder is in an opening shape, the other side of the positioning cylinder is in a closed shape, and the side with the opening shape of the moving cylinder are arranged close to each other, so that a variable accommodating space is formed between the moving cylinder and the positioning cylinder.
Further, preferably, the moving cylinder is connected with the positioning cylinder in a sealing and sliding mode.
Preferably, one closed end of the positioning cylinder is fixedly sleeved on a second rotating seat in a sealing manner, the second rotating seat is rotatably arranged in the outer bin body, one end of the second rotating seat extends out of the outer bin body and is coaxially connected with a driven wheel, the driven wheel is in transmission connection with another driving wheel for driving by a synchronous belt, and the driving wheel has power and can drive the positioning cylinder to swing;
the coaxial embedding intercommunication of the closure form one end of a removal section of thick bamboo has the control tube, the spacing slip of control tube axial is provided with swivel mount one, and the one end of control tube stretches out swivel mount one and is linked together with the upper reaches pipe, swivel mount one is sealed to rotate and sets up in the outer storehouse body, the tip of swivel mount one still is provided with holds bag two for hold the control tube tightly.
Further, as preferred, the spacing slip of axial is provided with the axial head that pressurizes in the two swivel bases, the one end of axial head that pressurizes is the disk body, and the other end is the body of rod, and the body of rod stretches out swivel base two is linked together with the downstream pipe, swivel base two's tip still is provided with holds a bag one tightly for hold the body of rod tightly.
Further, preferably, the moving cylinder and the positioning cylinder are both thin-walled elastically deformable structures.
Furthermore, as preferred, the positioning cylinder is embedded with a feeding and discharging head, the feeding and discharging head is provided with an electric control valve, one side of the bottom of the outer bin body is embedded with a coal feeding and discharging pipe, one end of the coal feeding and discharging pipe can be connected with the feeding and discharging head in a sealing and abutting mode, and the other end of the coal feeding and discharging pipe is used for feeding materials through a coal sample tank.
Further, preferably, a plurality of arc-shaped oscillating plates are axially distributed in the outer bin body in an array manner, and the oscillating plates are driven by an external oscillator;
one side of the outer bin body is communicated with a turbulent flow liquid inlet head, and the other side of the outer bin body is communicated with a turbulent flow liquid outlet head;
and the outer bin body is also provided with a confining pressure loading head which is used for being communicated with the output end of the confining pressure loading mechanism.
Further, preferably, the displacement fluid supply assembly includes:
the displacement fluid manual pump is provided with an output end and is used for outputting liquid phase fluid;
one end of the displacement fluid pipe is connected with the output end of the displacement fluid manual pump, and the other end of the displacement fluid pipe is communicated to the upstream pipe; and
a displacement fluid valve disposed on the displacement fluid tube.
Compared with the prior art, the invention provides the unconventional reservoir fluid adsorption migration displacement simulation measuring device, which has the following beneficial effects:
1. in the embodiment of the invention, one of the two gas supply assemblies can be selected as an adsorbed gas supply end, the corresponding valve between the other gas supply assembly and the displacement simulation carrier assembly is closed, the gas adsorption process of the unconventional reservoir core sample in the gas displacement simulation carrier assembly is realized, and the isobaric gas supply at two ends of the core is realized in the gas supply process through the upstream and downstream communicating pipes, so that the uniformity of gas supply pressure is improved, and the efficiency of the core sample adsorption process is further improved. In addition, one of the two groups of gas supply assemblies can be selected as a displacement gas supply end, and the other gas supply assembly can be selected as a displacement gas receiving end, so that the displacement process of adsorbed gas in the unconventional reservoir core sample in the displacement simulation carrier assembly can be realized. Moreover, liquid phase fluid can be provided for the displacement simulation carrier component through the displacement fluid supply component, so that a 'water displacement gas' process is realized;
2. in the embodiment of the invention, the distance between the moving cylinder and the positioning cylinder can be changed by driving the moving cylinder to move through the adjusting pipe, so that the accommodating spaces with different lengths are constructed, and after the coal sample is fed into the accommodating space, the axial force can be applied to the coal sample through the axial pressurizing head and can be adjusted by the sliding distance of the axial pressurizing head, so that the flexibility is high;
3. in the embodiment of the invention, the distance between the moving cylinder and the positioning cylinder can be changed by driving the moving cylinder to move through the adjusting pipe, so that containing spaces with different lengths are constructed, the coal sample can be rapidly fed in or fed out through the matching of the feeding and discharging head and the coal sample tank, the next experiment can be carried out without replacing the coal sample, and the experiment efficiency is improved;
4. in the embodiment of the invention, before the displacement, the shaking of the moving cylinder and the positioning cylinder can be used for being matched with the vacuum pump for exhausting, so that the vacuum exhausting efficiency and effect are improved, and the influence degree of the shaking on the displacement can be verified by the shaking of the moving cylinder and the positioning cylinder in the displacement process;
5. in the embodiment of the invention, the arc-shaped oscillation plate can be driven by the external oscillator to oscillate the confining pressure fluid in the outer bin body, and the pulsed liquid inlet is carried out by the turbulent flow liquid inlet head, so that the confining pressure fluid in the outer bin body is further oscillated, and the influence degree of external oscillation on displacement can be verified.
Drawings
FIG. 1 is a schematic overall structure diagram of an unconventional reservoir fluid adsorption migration displacement simulation measuring device;
FIG. 2 is a schematic structural diagram of a displacement simulation carrier assembly in an unconventional reservoir fluid adsorption migration displacement simulation measuring device;
FIG. 3 is a schematic structural diagram of a moving cylinder and a positioning cylinder in an unconventional reservoir fluid adsorption migration displacement simulation measuring device;
in the figure: 1. a gas supply assembly; 2. displacing the simulated carrier assembly; 3. an upstream-downstream communicating pipe; 4. a confining pressure loading mechanism; 5. a collection detection mechanism; 6. a vacuum pump; 7. a displacement fluid supply assembly; 11. an air supply tank; 12. a gas supply pipe; 13. an air supply valve; 14. a check valve; 15. a differential pressure detector; 16. an intercommunication valve; 71. a displacement fluid manual pump; 72. a displacement fluid tube; 73. a displacement fluid valve; 21. an upstream pipe; 22. a downstream pipe; 23. an outer bin body; 24. moving the drum; 25. a positioning cylinder; 26. feeding and discharging the stub bar; 27. a confining pressure loading head; 28. a coal sample tank; 29. an oscillator; 210. a turbulent flow liquid inlet head; 211. a turbulent liquid outlet head; 212. rotating a first base; 213. rotating a second base; 214. an axial compression head; 215. a driving wheel; 216. a first holding bag; 217. an adjustment tube; 218. and a second holding bag.
Detailed Description
Referring to fig. 1 to 3, the present invention provides an unconventional reservoir fluid adsorption migration displacement simulation measuring device, including:
the displacement simulation carrier component 2 is loaded with coal bodies inside, and two sides of the displacement simulation carrier component are respectively communicated with an upstream pipe 21 and a downstream pipe 22;
the two groups of air supply assemblies 1 are respectively a first air supply assembly and a second air supply assembly, wherein the air supply end of the first air supply assembly is communicated to the upstream pipe 21, and the air supply end of the second air supply assembly is communicated to the downstream pipe 22;
the confining pressure loading mechanism 4 is used for applying confining pressure to the coal in the displacement simulation carrier component 2, and the confining pressure loading mechanism can provide confining pressure by filling confining pressure liquid into a manual pump, which is not described herein again;
a vacuum pump 6, the suction end of which communicates with the downstream pipe 22;
the gas collection end of the collection detection mechanism 5 is communicated with the upstream pipe and the downstream pipe 22, and the collection detection mechanism can comprise weighing detection equipment such as a collection bottle and a balance, which are not described again; and
a displacement fluid supply assembly 7 capable of supplying a fluid for displacement into the displacement simulation carrier assembly 2;
an upstream communication pipe 3 and a downstream communication pipe 3 are also communicated between the upstream pipe 21 and the downstream pipe 22, and upstream and downstream communication valves are provided in the upstream and downstream communication pipes 3.
That is to say, be provided with two air feed subassemblies in this embodiment, two sets of optional one of air feed subassemblies is as adsorbed gas supply end, closes the corresponding valve between another air feed subassembly and displacement simulation carrier subassembly, realizes the gas adsorption process of unconventional reservoir rock core sample in the gas displacement simulation carrier subassembly to realize the isobaric air feed at rock core both ends through upper and lower reaches communicating pipe in the air feed process, improve the homogeneity of air feed pressure, and then improve the efficiency of rock core sample adsorption process. In addition, one of the two groups of gas supply assemblies can be selected as a displacement gas supply end, and the other gas supply assembly can be selected as a displacement gas receiving end, so that the displacement process of adsorbed gas in the unconventional reservoir core sample in the displacement simulation carrier assembly can be realized. Moreover, liquid phase fluid can be provided for the displacement simulation carrier component through the displacement fluid supply component, so that a 'water displacement gas' process is realized;
further, the gas supply assembly 1 includes:
an air supply tank 11 which is a high-pressure air supply tank body;
an air supply pipe 12, one end of which is communicated with the air outlet end of the air supply tank 11, and the other end of which is communicated to the upstream pipe 21, and the air supply pipe is also provided with an air supply valve;
the air supply pipes of the first air supply assembly and the second air supply assembly are communicated by adopting a differential pressure connecting pipe, the differential pressure connecting pipe is symmetrically provided with detection valves 14, and a differential pressure detector 15 is arranged on the differential pressure connecting pipe between the two detection valves 14; and
and the compensating pipe is connected in parallel to the pressure difference connecting pipe and is provided with a mutual communicating valve 16.
In this embodiment, as shown in fig. 2, the displacement simulation carrier assembly 2 includes:
an outer bin body 23;
a movable cylinder 24 having an open side and a closed side; and
and a positioning cylinder 25 having an open side and a closed side, wherein the open side and the open side of the moving cylinder 24 are disposed close to each other, so that a variable accommodating space is formed between the moving cylinder and the positioning cylinder.
Therefore, the coal body scraps can be limited to the accommodating spaces with different lengths by utilizing the moving cylinder 24 and the positioning cylinder 25, so that coal body samples with different lengths are formed, and different experimental requirements are met.
In a preferred embodiment, the moving cylinder 24 is connected with the positioning cylinder 25 in a sealing and sliding manner.
In this embodiment, the closed end of the positioning cylinder 25 is hermetically and fixedly sleeved on the second rotating seat 213, the second rotating seat 213 is rotatably disposed in the outer bin body, and one end of the second rotating seat 213 extends out of the outer bin body and is coaxially connected with a driven wheel, the driven wheel is in transmission connection with another driving wheel 215 for driving by using a synchronous belt, and the driving wheel has power, and the power can drive the positioning cylinder 25 to swing;
the coaxial embedding intercommunication of the closed form one end of moving section of thick bamboo 24 has adjusting pipe 217, adjusting pipe 217 is provided with on the transposition 212 to the spacing slip of axial, and the one end of adjusting pipe stretches out transposition 212 and is linked together with upstream pipe 21, transposition 212 is sealed to rotate and is set up in the outer storehouse body, the tip of transposition 212 still is provided with and holds two 218 of bag tightly for hold adjusting pipe 217 tightly.
In addition, the spacing slip of axial is provided with axial pressurization head 214 in the two 213 of swivel bases, the one end of axial pressurization head 214 is the disk body, and the other end is the body of rod, and the body of rod stretches out two 213 of swivel bases are linked together with the downstream pipe, two 213 of swivel bases's tip still is provided with and embraces bag 216 tightly for embrace the body of rod tightly, and the middle part of axial pressurization head runs through there is the through-hole.
Therefore, when implementing, move a section of thick bamboo 24 through the drive of regulating tube 217 and remove and can change the distance between a section of thick bamboo and the location section of thick bamboo, thereby establish the accommodation space of different length, and after sending into the coal sample in the accommodation space, can exert the axial force to the coal sample through axial pressurization head 214, and this axial force can be adjusted by the sliding distance of axial pressurization head, and is comparatively convenient, embedded pressure sensor in the axial pressurization head of preferred, thereby promote the accuracy of exerting pressure, in addition, in this embodiment, a section of thick bamboo and a location section of thick bamboo can rotate and rock, therefore, the rocking cooperation vacuum pump of usable removal section of thick bamboo and a location section of thick bamboo exhausts before the displacement, improve the efficiency and the effect of arranging the vacuum, and still can utilize the rocking of removal section of thick bamboo and a location section of thick bamboo to verify the influence degree of self rocking to the displacement in the displacement process.
In a preferred embodiment, the moving cylinder 24 and the positioning cylinder 25 are both thin-walled elastically deformable structures.
In this embodiment, an inlet and outlet stub bar 26 is embedded in the positioning cylinder 25, an electric control valve is arranged on the inlet and outlet stub bar 26, a coal inlet and outlet pipe is embedded in one side of the bottom of the outer bin body, one end of the coal inlet and outlet pipe can be connected with the inlet and outlet stub bar 26 in a sealing and abutting mode, the other end of the coal inlet and outlet pipe is fed by a coal sample tank 28, the coal sample tank can deliver coal samples to the accommodating space in an internal pushing mode, and the coal samples in the accommodating space can be taken out in a pumping mode, so that the total volume of the coal samples in the accommodating space is changed, the coal samples do not need to be integrally replaced, and the experiment efficiency is improved.
In a preferred embodiment, a plurality of arc-shaped oscillating plates are axially distributed in the outer bin body in an array manner, and the oscillating plates are driven by an external oscillator 29;
one side of the outer bin body is communicated with a turbulent flow liquid inlet head 210, and the other side of the outer bin body is communicated with a turbulent flow liquid outlet head 211;
and the outer bin body is also provided with a confining pressure loading head 27 which is communicated with the output end of the confining pressure loading mechanism 4.
Therefore, when implementing, can drive the arc oscillating plate through external oscillator 29 and carry out the oscillation to the confined pressure fluid in the outer storehouse body to carry out the pulsed feed liquor through the vortex feed liquor head, thereby further oscillate the confined pressure fluid in the outer storehouse body, thereby can realize verifying the influence degree of external oscillation to the displacement.
In the present embodiment, the displacement fluid supply assembly 7 includes:
a displacement fluid manual pump 71 having an output and for outputting liquid phase fluid;
a displacement fluid pipe 72, one end of which is connected to the output end of the displacement fluid manual pump 71 and the other end of which is connected to the upstream pipe 21; and
a displacement fluid valve 73 disposed on the displacement fluid tube.
In specific implementation, the method comprises the following steps:
s1, driving a moving cylinder 24 to move through an adjusting pipe 217 to change the distance between the moving cylinder and a positioning cylinder, so that an accommodating space with a specific length is constructed;
s2, after the coal sample is fed into the accommodating space through the material inlet and outlet head, vacuumizing the coal sample by using a vacuum pump;
s3, applying axial force to the coal sample through the axial pressurizing head 214, and refilling confining pressure fluid into the outer bin body through the confining pressure loading mechanism so as to apply confining pressure to the coal sample;
s4, using the first gas supply assembly as an adsorbed gas supply end, closing a corresponding valve between the second gas supply assembly and the displacement simulation carrier assembly, and realizing a gas adsorption process of the unconventional reservoir core sample in the gas displacement simulation carrier assembly;
s5, supplying liquid phase fluid by using a displacement fluid supply assembly so as to displace gas in the coal sample;
s6, receiving the displacement gas by using the second gas supply assembly as a displacement gas receiving end, and then collecting the gas by using a collecting and detecting mechanism;
s7, recording experimental data, changing parameters of the experimental data, and repeating S1-S6.
S8, repeating S1-S3, using the first gas supply assembly as an adsorbed gas supply end, closing a corresponding valve between the second gas supply assembly and the displacement simulation carrier assembly, and realizing a gas adsorption process of the unconventional reservoir core sample in the gas displacement simulation carrier assembly;
s9, supplying displacement gas by using the first gas supply assembly so as to displace the gas in the coal sample;
s10, receiving the displacement gas by using a second gas supply assembly as a displacement gas receiving end, and then collecting the gas by a collecting and detecting mechanism;
s11, recording experimental data, changing parameters of the experimental data, and repeating S8-S10.
S12, repeating S1-S3, supplying liquid phase fluid by using the displacement fluid supply assembly, closing corresponding valves among the first gas supply assembly, the second gas supply assembly and the displacement simulation carrier assembly, and realizing the liquid adsorption process of the unconventional reservoir core sample in the gas displacement simulation carrier assembly;
s13, supplying displacement gas by using the first gas supply assembly as a displacement gas supply end so as to displace the gas in the coal sample;
s14, receiving the displacement gas by using the second gas supply assembly as a displacement gas receiving end, and then collecting the gas by using a collecting and detecting mechanism;
s15, recording experimental data, changing parameters of the experimental data, and repeating S12-S14.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.
Claims (10)
1. Unconventional reservoir fluid adsorption migration displacement simulation measuring device, its characterized in that: the method comprises the following steps:
the displacement simulation carrier assembly (2) is loaded with coal bodies inside, and two sides of the displacement simulation carrier assembly are respectively communicated with an upstream pipe (21) and a downstream pipe (22);
the two groups of air supply assemblies (1) are respectively a first air supply assembly and a second air supply assembly, wherein the air supply end of the first air supply assembly is communicated to the upstream pipe (21), and the air supply end of the second air supply assembly is communicated to the downstream pipe (22);
the confining pressure loading mechanism (4) is used for applying confining pressure to the coal body in the displacement simulation carrier component (2);
a vacuum pump (6) with a suction end communicated with the upstream and downstream pipes;
the gas collection end of the collection detection mechanism (5) is communicated to the upstream pipe and the downstream pipe (22); and
a displacement fluid supply assembly (7) capable of supplying a fluid for displacement into the displacement simulation carrier assembly (2);
and an upstream and downstream communicating pipe (3) is communicated between the upstream pipe (21) and the downstream pipe (22), and an upstream and downstream communicating valve is arranged on the upstream and downstream communicating pipe (3).
2. The unconventional reservoir fluid imbibition displacement simulation measuring device of claim 1, wherein: the gas supply assembly (1) comprises:
an air supply tank (11) which is a high-pressure air supply tank body;
the air supply pipe (12) is provided with an air supply valve, one end of the air supply pipe is communicated with the air outlet end of the air supply tank (11), the other end of the air supply pipe is communicated to the upstream pipe (21);
the air supply pipes of the first air supply assembly and the second air supply assembly are communicated by adopting a differential pressure connecting pipe, the differential pressure connecting pipe is symmetrically provided with detection valves (14), and a differential pressure detector (15) is arranged on the differential pressure connecting pipe between the two detection valves (14); and
and the compensating pipe is connected in parallel to the differential pressure connecting pipe and is provided with a mutual-communicating valve (16).
3. The unconventional reservoir fluid imbibition displacement simulation measuring device of claim 1, wherein: the displacement simulation carrier assembly (2) comprises:
an outer cartridge body (23);
a movable cylinder (24) having an open side and a closed side; and
and one side of the positioning cylinder (25) is in an opening shape, the other side of the positioning cylinder is in a closed shape, and the side with the opening shape of the moving cylinder (24) are arranged close to each other, so that a variable accommodating space is formed between the moving cylinder and the positioning cylinder.
4. The unconventional reservoir fluid imbibition displacement simulation measuring device of claim 3, wherein: the moving cylinder (24) is connected with the positioning cylinder (25) in a sealing and sliding way.
5. The unconventional reservoir fluid imbibition displacement simulation measuring device of claim 3, wherein: the closed end of the positioning cylinder (25) is fixedly sleeved on a second rotating seat (213) in a sealing manner, the second rotating seat (213) is rotatably arranged in the outer bin body, one end of the second rotating seat (213) extends out of the outer bin body and is coaxially connected with a driven wheel, the driven wheel is in transmission connection with another driving wheel (215) for driving by adopting a synchronous belt, and the driving wheel has power which can drive the positioning cylinder (25) to swing;
the coaxial embedding intercommunication of the closure form one end of moving section of thick bamboo (24) has adjusting pipe (217), adjusting pipe (217) axial spacing slip is provided with swivel mount (212), and the one end of adjusting pipe stretches out swivel mount (212) and is linked together with upstream pipe (21), swivel mount (212) seal rotation sets up in the outer storehouse body, the tip of swivel mount (212) still is provided with holds tightly bag two (218) for hold tightly adjusting pipe (217).
6. The unconventional reservoir fluid imbibition displacement simulation measuring device of claim 5, wherein: the spacing slip of axial is provided with axial pressurization head (214) in transposition two (213), the one end of axial pressurization head (214) is the disk body, and the other end is the body of rod, and the body of rod stretches out transposition two (213) are linked together with the downstream pipe, the tip of transposition two (213) still is provided with holds tightly bag (216) for hold tightly the body of rod.
7. The unconventional reservoir fluid imbibition displacement simulation measuring device of claim 3 or 5, wherein: the moving cylinder (24) and the positioning cylinder (25) are both thin-walled elastically deformable structures.
8. The unconventional reservoir fluid imbibition displacement simulation measuring device of claim 5, wherein: an inlet and outlet stub bar (26) is embedded in the positioning cylinder (25), an electric control valve is arranged on the inlet and outlet stub bar (26), a coal inlet and outlet pipe is embedded in one side of the bottom of the outer bin body, one end of the coal inlet and outlet pipe can be connected with the inlet and outlet stub bar (26) in a sealing and abutting mode, and the other end of the coal inlet and outlet pipe is supplied by a coal sample tank (28).
9. The unconventional reservoir fluid imbibition displacement simulation measuring device of claim 7, wherein: a plurality of arc-shaped oscillating plates are axially distributed in the outer bin body in an array manner, and the oscillating plates are driven by an external oscillator (29);
one side of the outer bin body is communicated with a turbulent flow liquid inlet head (210), and the other side of the outer bin body is communicated with a turbulent flow liquid outlet head (211);
and the outer bin body is also provided with a confining pressure loading head (27) which is communicated with the output end of the confining pressure loading mechanism (4).
10. The unconventional reservoir fluid imbibition displacement simulation measuring device of claim 1, wherein: the displacement fluid supply assembly (7) comprises:
a displacement fluid manual pump (71) having an output and for outputting liquid phase fluid;
a displacement fluid pipe (72), one end of which is connected with the output end of the displacement fluid manual pump (71), and the other end of which is communicated with the upstream pipe (21); and
a displacement fluid valve (73) disposed on the displacement fluid tube.
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