CN208206742U - Shale gas reservoir micro-fractures high-temperature and high-pressure visual air water two phase fluid flow experimental provision - Google Patents
Shale gas reservoir micro-fractures high-temperature and high-pressure visual air water two phase fluid flow experimental provision Download PDFInfo
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- CN208206742U CN208206742U CN201820646734.0U CN201820646734U CN208206742U CN 208206742 U CN208206742 U CN 208206742U CN 201820646734 U CN201820646734 U CN 201820646734U CN 208206742 U CN208206742 U CN 208206742U
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- seepage flow
- flow plate
- conservancy diversion
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Abstract
The utility model relates to the shale gas reservoir micro-fractures high-temperature and high-pressure visual air water two phase fluid flow experimental provisions of gas-liquid two-phase percolation law in shale under a kind of simulation high temperature and pressure.It is used to study the flowing law and fracturing fluid recovery (backflow) rule of air water two-phase.Its technical solution: 2PB series constant-flux pump one end is connect with fluid reservoir, and the other end connects high-pressure pump and pressure regulator valve, pressure gauge, and pressure gauge connects the water conservancy diversion pipeline of seepage flow plate arrival end by four-way valve again；Seepage flow plate is fitted closely by sapphire glass plate, rock beam, and surrounding is connected with around sealing rubber cover added with outline border；Outline border surface is equipped with pressure sensor and temperature sensor, and each sensor is connected with data line with data acquisition board respectively, and data acquisition board is connect with computer again；Outline border lower surface connects heater, the seepage flow plate other end four-way valve quality of connection flowmeter and collection liquid bottle.The utility model realizes the visualization of true core imbibition phenomena, and device is simple to operation, studies for air water flowing law.
Description
Technical field
The invention belongs to oil-gas field development fields, and in particular to a kind of shale gas reservoir micro-fractures high-temperature and high-pressure visual gas
Water two phase fluid flow experimental provision and method.
Background technique
Shale gas with rich reserves, Exploitation Potential is huge occupies an important position in world energy sources, but shale gas is as one
Kind Oil in Super-low Permeability gas reservoir, reservoir porosity, permeability are extremely low, can not obtain industrial gas according to the production method production of normal gas pools
Stream, it is necessary to obtain considerable air-flow by extensive volume fracturing to increase seepage area.But generally existing pressure break after reservoir fracturing
Liquid returns row and leads low problem, and fracturing fluid recovery (backflow) rate is averagely only 35%-62% after general shale gas well liquid loading 1 year, that is, has a large amount of
Fracturing fluid residual cause the gas liquid two-phase flow of long period, the absorption solution of flowing and shale gas to shale gas in the earth formation
Suction all has an impact, and causes reservoir secondary injury.Therefore, clearly recognize existing way and fracturing fluid of the fracturing fluid in shale
The row's of returning rule, for improve the row of returning lead and production capacity to provide theoretical foundation be very necessary.
Application No. is 201620863035.2 patent applications " a kind of fracturing fluid recovery (backflow) board slit simulation apparatus " to the row of returning
The measurement of liquid quality is set about researching and analysing, but the indoor specific mobility status of water conservancy diversion is not known；Application No. is
A kind of 201720882755.8 patent application " experimental provision of simulation fracturing fluid recovery (backflow) control proppant backflow " and application number
It is laid particular emphasis on for 201610827564.1 patent application " simulation proppant is laid and the experimental provision and method of fracturing fluid recovery (backflow) "
The visuality of process, but in glass plate opposite joint fracturing fluid without absorbability, it cannot be said that influence of the bright matrix to fracturing fluid imbibition, it is real
Test result reliability deficiency.Application No. is 201320299427.7 patent application " coal bed gas pit shaft biphase gas and liquid flow simulation dresses
Set " and application No. is 201710205266.3 patent application " it is a kind of simulation coal body in gas-liquid two-phase seepage flow experimental rig and
Test method " the multi-angle research for considering gas liquid two-phase flow is laid particular emphasis on, more really simulation underground environment, but effect of visualization
It is poor, it relies primarily on the analysis to experimental data and obtains conclusion.
The present invention passes through the collective effect of rock beam and sapphire glass plate, under visual Simulation high-temperature and high-pressure conditions in shale
The flow event of gas-liquid two-phase, for air water two-phase flowing law and further research fracturing fluid the row's of returning rule provide according to
According to.
Summary of the invention
The purpose of the present invention is: the flow event in order to simulate gas-liquid two-phase in shale under high-temperature and high-pressure conditions is ground simultaneously
The flowing law and fracturing fluid recovery (backflow) rule for studying carefully air water two-phase, provide a kind of shale gas reservoir micro-fractures high-temperature and high-pressure visual
Air water two phase fluid flow experimental provision.
In order to achieve the above objectives, the invention adopts the following technical scheme: shale gas reservoir micro-fractures high-temperature and high-pressure visual
Air water two phase fluid flow experimental provision, by fluid reservoir, water conservancy diversion pipeline, 2PB series constant-flux pump, high-pressure pump, seepage flow plate, heater group
At.Its structure feature is: 2PB series constant-flux pump is passed through seepage flow plate gas-liquid amount for adjusting, one end water conservancy diversion pipeline of constant-flux pump with
Fluid reservoir or atmosphere are directly connected to, and the other end water conservancy diversion pipeline of constant-flux pump connects high-pressure pump；High-pressure pump is connect with pressure regulator valve, pressure regulation
Valve connects pressure gauge, and pressure gauge connects seepage flow plate arrival end water conservancy diversion pipeline by four-way valve again；Each orientation of seepage flow plate surrounding is all provided with
There is water conservancy diversion pipeline that can carry out the multi-faceted displacement of different directions, seepage flow plate is fitted closely by sapphire glass plate, rock beam.Benefit
Hydraulic fracturing is carried out with natural self-supporting crack existing in original rock beam to be allowed to generate obvious crack, continues that proppant will be had
Load fluid inject crack, crack side is stretched and is supported, since crack degree of roughness difference has supervened inconsistent phenomenon.
Take out one of rock beam and the sapphire glass plate with rock beam same shape obtained by casting technique, by sapphire glass plate with
Other one block of rock beam is fitted closely according to crack, and surrounding guarantees air-tightness around sealing rubber cover, and added with outline border, is used up and down
It is bolted.Outline border upper surface is separately installed with 3 equidistant spaced pressure sensors and temperature sensor, each to sense
Device is connected with data line with data acquisition board respectively, and data acquisition board is connect with computer again；The connection heating of outline border lower surface
Device heats seepage flow plate.The seepage flow plate other end passes through four-way valve quality of connection flowmeter and collection liquid bottle with water conservancy diversion pipeline,
To facilitate the acquisition and analysis of data.
The working principle of the invention: fluid reservoir is for holding displacement liquid --- water, the water conservancy diversion of 2PB series constant-flux pump one end
Liquid in fluid reservoir is passed through in seepage flow plate and realizes the experiment of water drive gas by pipeline, and uninterrupted and time etc. pass through 2PB system
Column constant-flux pump is adjusted, and displacement liquid is pumped into seepage flow plate through pressure regulator valve and realizes condition of high voltage by high-pressure pump, and heater is to seepage flow
Plate carries out different degrees of heating and realizes hot conditions, and the pressure sensor and temperature sensor of seepage flow plate outline border upper surface pass through
Data line is connected with data acquisition board, and data acquisition board converts the analog signal that each pressure sensor and temperature sensor input
For digital signal, then input computer stored.Seepage flow plate is made of the sapphire glass plate and rock beam fitted closely, the two contact
The gap at place is used to simulate the crack in subsurface rock, is full of air under original state inside gap, gas-liquid is presented after being passed through water
Two-phase flow can pass through the imbibition effect of transparent sapphire glass plate observation rock beam and the flowing law of gas-liquid two-phase at this time.
The water conservancy diversion pipeline of the seepage flow plate other end is by four-way valve quality of connection flowmeter to measure discharge tolerance, and collection liquid bottle is for receiving
Collect displacing phase --- water, implements acquisition and analysis in relation to data.
Beneficial effects of the present invention: (1) can gas-water phases flowing state in shale under real simulation high-temperature and high-pressure conditions, it is real
The visualization for phenomena such as having showed true core imbibition；(2) this experimental provision is simple to operation, while realizing the full mistake of aqueous vapor displacement
Journey is simulated and is effectively observed, and is reduced experimental cost, is enhanced the operability of experiment；(3) it is able to achieve multi-angle, multi-faceted
Displacement process facilitates the analysis of fracturing fluid recovery (backflow) rule closer to true stratum condition.
Detailed description of the invention
Fig. 1 is that the structure of shale gas reservoir micro-fractures high-temperature and high-pressure visual air water two phase fluid flow experimental provision of the present invention is shown
It is intended to.
Fig. 2 is the internal structure chart of seepage flow plate in this seepage experimental apparatus.
In figure: 1, fluid reservoir, 2, water conservancy diversion pipeline, 3,2PB series constant-flux pump, 4, high-pressure pump, 5, pressure regulator valve, 6, pressure gauge,
7, seepage flow plate, 8, bolt, 9, outline border, 10, four-way valve, 11, pressure sensor, 12, temperature sensor, 13, data line, 14, number
According to collection plate, 15, computer, 16, mass flowmenter, 17, collection liquid bottle, 18, sapphire glass plate, 19, rock beam, 20, sealing
Rubber sleeve, 21, heater.
Specific embodiment
In conjunction with attached drawing, the invention will be further described.Please refer to Fig. 1, Fig. 2.Shale gas reservoir micro-fractures high temperature and pressure can
Depending on change air water two phase fluid flow experimental provision, by fluid reservoir 1, water conservancy diversion pipeline 2,2PB series constant-flux pump 3, high-pressure pump 4, seepage flow plate 7,
Heater 21 forms.Its structure feature is: 2PB series constant-flux pump 3 is passed through 7 gas-liquid amount of seepage flow plate for adjusting, and the one of constant-flux pump
End water conservancy diversion pipeline 2 is directly connected to fluid reservoir 1 or atmosphere, and the water conservancy diversion pipeline of the constant-flux pump other end connects high-pressure pump 4, high-pressure pump 4
It is connect with pressure regulator valve 5, pressure regulator valve 5 connects pressure gauge 6, and pressure gauge 6 connects 7 arrival end diversion pipe of seepage flow plate by four-way valve 10 again
Line 2.Each orientation of 7 surrounding of seepage flow plate is equipped with multi-faceted displacement of the water conservancy diversion pipeline 2 to carry out different directions, and seepage flow plate 7 is by indigo plant
Cameo glass plate 18, rock beam 19 fit closely.Waterpower pressure is carried out using natural self-supporting crack existing in original rock beam
It splits and is allowed to generate obvious crack, continue the load fluid injection crack with proppant, crack side is stretched and is supported, due to
Crack degree of roughness difference has supervened inconsistent phenomenon.Take out one of rock beam obtained by casting technique it is identical with rock beam
The sapphire glass plate 18 of shape fits closely sapphire glass plate 18 and other one block of rock beam 19 according to crack, four chow rings
Around sealing rubber cover 20 to guarantee air-tightness, and added with outline border 9, connected up and down with bolt 8.9 upper surface of outline border is separately installed with 3
A equidistant spaced pressure sensor 11 and temperature sensor 12, each sensor use data line 13 and data to acquire respectively
Plate 14 is connected, and data acquisition board 14 is connect with computer 15 again, and 9 lower surface of outline border connects heater 21 and carries out to seepage flow plate 7
Heating.7 other end water conservancy diversion pipeline 2 of seepage flow plate is by 10 quality of connection flowmeter 16 of four-way valve and collection liquid bottle 17, to facilitate number
According to acquisition and analysis.
After first starter, the logical liquid measure of 2PB series constant-flux pump 3 is adjusted, pressure regulator valve 5 is adjusted and controls pressure, use simultaneously
Heater 21 heats seepage flow plate 7；Then by the water conservancy diversion pipeline 2 of 2PB series constant-flux pump 3 by the liquid in fluid reservoir 1
It is passed through in seepage flow plate 7 and realizes the experiment of different direction water drive gas；Seepage flow plate 7 is by the sapphire glass plate 18 and rock beam 19 that fit closely
Composition, the gap of the two contact position are used to simulate the crack in the rock core of underground, are full of air under original state inside gap, are passed through
Gas liquid two-phase flow is presented after water, observes the imbibition effect and gas-liquid of rock beam 19 in experiment through transparent sapphire glass plate 18
The flowing law of two-phase；The water conservancy diversion pipeline 2 of 7 other end of seepage flow plate is measured with 10 quality of connection flowmeter 16 of four-way valve and displaces gas
Amount；Collection liquid bottle 17 is for collecting displacing phase --- and water implements acquisition and analysis in relation to data.7 upper surface of seepage flow plate it is each
Pressure sensor 11 and the data line 13 of temperature sensor 12 transfer signals to data acquisition board 14, and data acquisition board 14 again will
The analog signal of collection is converted into digital signal data line 13 and inputs the storage of computer 15, that is, completes experiment.
Claims (1)
1. shale gas reservoir micro-fractures high-temperature and high-pressure visual air water two phase fluid flow experimental provision, be by fluid reservoir, water conservancy diversion pipeline,
2PB series constant-flux pump, high-pressure pump, seepage flow plate, heater composition, it is characterized in that: one end diversion pipe of 2PB series constant-flux pump (3)
Line (2) is directly connected to fluid reservoir (1) or atmosphere, and the other end of 2PB series constant-flux pump (3) connects high-pressure pump with water conservancy diversion pipeline
(4)；High-pressure pump (4) is connect with pressure regulator valve (5), and pressure regulator valve (5) connects pressure gauge (6), and pressure gauge (6) passes through four-way valve (10) again
Seepage flow plate (7) arrival end water conservancy diversion pipeline (2) is connected, seepage flow plate (7) each orientation of surrounding is provided with water conservancy diversion pipeline (2) and carries out difference
The multi-faceted displacement in direction；Seepage flow plate (7) is fitted closely and is constituted by sapphire glass plate (18), rock beam (19), one piece of sapphire
Glass plate (18) is fitted closely with other one block of rock beam (19) according to crack；Seepage flow plate (7) surrounding surround sealing rubber cover (20),
The outside of rubber sleeve (20) is equipped with outline border (9), and outline border (9) is connected with bolt (8) up and down；Outline border (9) upper surface is separately installed with 3
A equidistant spaced pressure sensor (11) and temperature sensor (12), each sensor use data line (13) and number respectively
It is connected according to collection plate (14), data acquisition board (14) is connect with data line (13) with computer (15) again；Outline border (9) lower surface
Connection heater (21) seepage flow plate (7) is heated, seepage flow plate (7) other end water conservancy diversion pipeline (2) by four-way valve (10) with
Mass flowmenter (16) one end is connected, and the other end of mass flowmenter (16) connects collection liquid bottle (17) with water conservancy diversion pipeline (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820646734.0U CN208206742U (en) | 2018-05-03 | 2018-05-03 | Shale gas reservoir micro-fractures high-temperature and high-pressure visual air water two phase fluid flow experimental provision |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820646734.0U CN208206742U (en) | 2018-05-03 | 2018-05-03 | Shale gas reservoir micro-fractures high-temperature and high-pressure visual air water two phase fluid flow experimental provision |
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| CN208206742U true CN208206742U (en) | 2018-12-07 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108333098A (en) * | 2018-05-03 | 2018-07-27 | 西南石油大学 | Shale gas reservoir micro-fractures high-temperature and high-pressure visual air water two phase fluid flow experimental provision |
| CN110346386A (en) * | 2019-06-27 | 2019-10-18 | 中国石油大学(华东) | A kind of reservoir damage test device being convenient to clean |
| CN111720101A (en) * | 2019-03-20 | 2020-09-29 | 中国石油大学(北京) | Simulation system and simulation method for shale gas well fracturing flowback |
| CN112730196A (en) * | 2020-12-25 | 2021-04-30 | 西南石油大学 | High-temperature high-pressure microscopic visual flowing device and experimental method |
-
2018
- 2018-05-03 CN CN201820646734.0U patent/CN208206742U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108333098A (en) * | 2018-05-03 | 2018-07-27 | 西南石油大学 | Shale gas reservoir micro-fractures high-temperature and high-pressure visual air water two phase fluid flow experimental provision |
| CN108333098B (en) * | 2018-05-03 | 2023-12-01 | 西南石油大学 | Shale gas reservoir microcrack high-temperature high-pressure visual gas-water two-phase seepage experimental device |
| CN111720101A (en) * | 2019-03-20 | 2020-09-29 | 中国石油大学(北京) | Simulation system and simulation method for shale gas well fracturing flowback |
| CN111720101B (en) * | 2019-03-20 | 2021-12-07 | 中国石油大学(北京) | Simulation system and simulation method for shale gas well fracturing flowback |
| CN110346386A (en) * | 2019-06-27 | 2019-10-18 | 中国石油大学(华东) | A kind of reservoir damage test device being convenient to clean |
| CN112730196A (en) * | 2020-12-25 | 2021-04-30 | 西南石油大学 | High-temperature high-pressure microscopic visual flowing device and experimental method |
| CN112730196B (en) * | 2020-12-25 | 2022-03-11 | 西南石油大学 | High-temperature high-pressure microscopic visual flowing device and experimental method |
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