CN208433157U - A kind of shale gas reservoir exploitation novel analog experimental provision - Google Patents
A kind of shale gas reservoir exploitation novel analog experimental provision Download PDFInfo
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Abstract
The utility model relates to the experimental provisions in natural gas extraction field, disclose a kind of shale gas reservoir exploitation novel analog experimental provision, it include: high-pressure air source system, injected system, model system, insulating box system, back pressure system and data collection system composition, it include intermediate receptacle and bulk container in the injected system, the core holding unit in intermediate receptacle and model system in injected system is located in insulating box.The utility model connects flat plate model core holding unit device and two full-hole core clamper devices, the rock core of different scale size is together in series, multiple dimensioned pore character in analog shale gas reservoir reflects the Analysis On Multi-scale Features that the shale gas seepage flow influenced by multi-scale effect has.
Description
Technical field
The utility model relates to the experimental provisions in natural gas extraction field more particularly to a kind of shale gas reservoir to exploit New-type mould
Draft experiment device.
Background technique
Shale gas is formed, is migrated, preservation and withdrawal mechanism are different from routine naturally as a kind of novel unconventional energy resource
Gas is present in the silty of mud stone, high-carbon mud stone, shale and sandwich-like, in argillaceous siltstoue stratum, raw for natural gas
At later in source bed aggregation nearby as a result, shale gas reservoir shows as typical " original place " Reservoir model.In shale gas reservoir
Natural gas is mainly with adsorbed state preservation in rock particles and organic matter surface, or with free state preservation in hole and crack
Among, there are also minimal amount of dissolved states to exist.The preservation of adsorption-like natural gas and the content of organic matter are closely related, it and it is free
In growth and decline relation each other between the natural Gas content of shape, wherein the changes of contents of adsorbed state natural gas is between 20% ~ 85%.Shale
Porosity type can be divided into grade hole, micron order hole and nanoscale hole in gas reservoir, in shale gas seepage flow, shale gas with
The effects of channel surfaces collision, diffusion, make migration that Analysis On Multi-scale Features, including parsing, diffusion and Darcy Flow be presented, in millimeter grade hole
It is mainly Darcy Flow in gap, is in the micron-scale mainly diffusion and Darcy Flow in hole, is mainly parsed in nanoscale hole.With
Conventional gas is compared, the feature that shale gas reservoir has a very wide distribution, thickness is big and adsorbed gas content is big, so that shale gas reservoir is developed
Have the advantages that production life of well is long and the production cycle is long.Shale gas has good exploration prospect in China, and China's shale gas is pre-
The mining resources potentiality of survey can reach 25.08 tcms (without Qinghai-Tibet area).Currently, at China's shale gas exploration and development
In starting stage and theory study stage, it is necessary to carry out laboratory experiment evaluation study the characteristics of to shale gas reservoir.Because of shale gas
Own characteristic, at present in-house laboratory investigation content mainly include petrology analysis, geochemical analysis, gas-bearing property analysis, cause
Close property rock special project analysis etc., and the various withdrawal mechanisms of comprehensive study shale gas reservoir, production performance etc. indoors
Content it is less.
Utility model content
The utility model provides a kind of shale gas reservoir exploitation novel analog experimental provision, solves comprehensive indoors in the prior art
Close the less technical problem of the content of various withdrawal mechanisms, production performance of research shale gas reservoir etc..
The purpose of this utility model is achieved through the following technical solutions:
A kind of shale gas reservoir exploits novel analog experimental provision, including high-pressure air source system, injected system, model system,
Insulating box system, back pressure system and data collection system composition, include intermediate receptacle and bulk container in the injected system,
The core holding unit in intermediate receptacle and model system in injected system is located in insulating box.
The technical effect of the utility model are as follows:
Flat plate model core holding unit device and two full-hole core clamper devices are connected, by different scale
The rock core of size is together in series, the multiple dimensioned pore character in analog shale gas reservoir, reflects because of multi-scale effect influence
The Analysis On Multi-scale Features that shale gas seepage flow has are capable of the recovery process of accurate simulation shale gas reservoir, can overall merit shale gas reservoir
Different modes withdrawal mechanism and production performance.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without any creative labor, can also be according to this
A little attached drawings obtain other attached drawings.
Fig. 1 is the structural schematic diagram of the utility model embodiment.
Specific embodiment
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, with reference to the accompanying drawing and have
Body embodiment is described in further detail the utility model.
As shown in Figure 1, the utility model provides a kind of simulation shale gas reservoir exploitation simulated experiment apparatus, including high-pressure air source
System, injected system, model system, insulating box system, back pressure system and data collection system.
High-pressure air source system mainly includes two parts, high-purity CH4/CO2/He high pressure gas cylinder 5 be sequentially connected the 5th valve 6,
First intermediate receptacle 3 of booster pump 8, injected system；N2 high pressure gas cylinder 32 is sequentially connected the 6th valve 31, booster pump 29, back pressure
The one the second intermediate receptacles 34 of system.First booster pump 8 is connected with the first air compressor 7,8 one end of the first booster pump with
The connection of first high pressure gas cylinder 5, one end is connect with the first intermediate receptacle 3；Inlet valve 11 is sequentially connected the clamping of flat plate model rock core
Device 13,15, first full-hole core clampers 16 of the 7th valve, 18, second full-hole core clampers 19 of the 8th valve,
Outlet valve 21, the first first pressure sensor 12 and the second second pressure sensor 14 are respectively at flat plate model core holding unit
13 entrance and exit is connected, and third third pressure sensor 17 is connected with the outlet of first full-hole core clamper 16
It connects, the 4th the 4th pressure sensor 20 is connected with the outlet of second full-hole core clamper 19；
Second booster pump 29 is connected with the second air compressor 30,29 one end of the second booster pump and the second high pressure gas cylinder 32
Connection, one end is connect with the second intermediate receptacle 34；Inlet valve 11 is sequentially connected flat plate model core holding unit 13, the 7th valve
15, first full-hole core clamper 16, the 8th valve 18, second full-hole core clampers 19, outlet valves 21.Increase
Press pump is that the gas source of intermediate receptacle steadily increases pressure, and the bleed pressure in booster pump enters centre after increasing to setting pressure
Container makes in intermediate receptacle full of high pressure gas.
High-precision high voltage displacement pump 1 in injected system is sequentially connected the first bulk container 40, the first valve 2, first
Intermediate receptacle 3, intermediate receptacle the second valve of upper end 4, emptying valve 9, model system inlet valve 11.First intermediate receptacle
3 upper ends are connected with the inlet valve of model system, and 3 lower end of the first intermediate receptacle is connected with high-precision high voltage pump 1, high-precision
High pressure displacement pump 1 provides pressure source (transmission medium is hydraulic oil) for the first intermediate receptacle 3, to the gas source of the first intermediate receptacle 3
Pressure is adjusted, and is entered in model system with more stable pressure.It, can test model system when first intermediate receptacle 3 is full of He
Pore volume in the error volume and line volume and shale core of instrument in system；
When first intermediate receptacle 3 is full of CH4, pressure testing is carried out to model system, it is ensured that the leakproofness of model system is simultaneously
The shale core part of model system is sufficiently saturated CH4 and provides gas source；When first intermediate receptacle 3 is full of CO2, to evaluate shale gas
Hiding provides CO2 gas source with the mining method of CO2 displacement CH4.
Inlet valve 11 in model system is sequentially connected flat plate model core holding unit 13,15, first, the 7th valve
Full-hole core clamper 16,18, second full-hole core clampers 19 of the 8th valve, the first valve 21 of outlet, the first pressure
Entrance and exit of the force snesor 12 with second pressure sensor 14 respectively at flat plate model core holding unit 13 is connected, third
Pressure sensor 17 is connected with the outlet of first full-hole core clamper 16, and the 4th pressure sensor 20 and second are complete
The outlet of diameter core holding unit 19 is connected.Connection is controlled by valve between 3 core holding units (13,16,19), rock core
The pressure at clamper both ends is passed by the first first pressure sensor 12, the second second pressure sensor 14, third third pressure
Sensor 17, the detection of the 4th the 4th pressure sensor 20, the first first pressure sensor 12, the second second pressure sensor 14, the
Three third pressure sensors 17, the 4th the 4th pressure sensor 20 are connect with data signal acquisition device 24, and collected data pass
It is defeated by the data acquisition module of computer 25, above-mentioned received data are shown the song that pressure changes over time by acquisition module
Line.Inlet valve 11 is connected with 3 upper end of the first intermediate receptacle in injected system, is connected with the upper of intermediate receptacle between the two
Hold the second valve 4 and emptying valve 9, it is to being equipped in core holding unit in model system that inlet valve 11 is connect with return pump 10
Shale core partial vacuum, outlet valve 21 is connected with 26 entrance of back-pressure valve in back pressure system；It further include manual pump
23 by pipeline connect six-way valve 22, respectively with 13, first full-hole core clampers 16 of flat plate model core holding unit,
Second full-hole core clamper 19 connects, and manual pump 23 is mainly 13, first full diameters of flat plate model core holding unit
16, second full-hole core clampers 19 of core holding unit provide radial confining pressure (transmission medium is hydraulic oil), and simulation is practical
Burden pressure variation in stratum.It is wherein (long × wide using the geometric dimension of plate rock core in flat plate model core holding unit 13
× thick) it is 200mm × 200mm × (50-100) mm, plate rock core is artificial or shale core of appearing；First full-hole core
16, second full-hole core clampers 19 of clamper use the size (diameter × length) of full-hole core for φ (50-60)
Mm × (50-100) mm, full-hole core are natural or shale core of appearing, and plate rock core and full-hole core are mounted in rubber sleeve
In, rubber sleeve is located in core holding unit.The plate rock core of use descends two sides to generate certain depth and width using measure on it
The crack of degree is in a degree of opening under low confining pressure, is in a degree of closed state under high confining pressure, it is therefore an objective to be
Sufficient adsorbed gas in shale core.
Insulating box system is mainly an insulating box 39, mainly has high sensitivity temperature sensor and temperature control in insulating box 39
Device processed accurately controls the variation of temperature, provides reliable experimental temperature for experimental system, the flat plate model rock in model system
In heart clamp holder 13, first full-hole core clamper 16, second full-hole core clamper 19 and injected system
One intermediate receptacle, 3 part should be located in insulating box.
Back-pressure valve 26 in back pressure system is sequentially connected the upper end valve of blow valve 27, the first third valve 28, intermediate receptacle
It is door 33, the one the second intermediate receptacles 34, the 4th valve 35 of lower end of intermediate receptacle, the one the first the first bulk containers 41, high
Precision high pressure displacement pump 36.26 entrance of back-pressure valve is connected with the first valve of outlet 21 in model system, and back-pressure valve 26 exports
It is connected with the gas flowmeter 38 of data collection system, the one the second 34 upper ends of intermediate receptacle are connected with back-pressure valve 26, in
Between 34 lower end of container and high-precision high voltage pump 36 be connected, high-precision high voltage pump 36 provides pressure for the one the second intermediate receptacles 34
Source (transmission medium is hydraulic oil) is adjusted the bleed pressure of the one the second intermediate receptacles 34, with the gas of stable state
Into in the cavity of back-pressure valve 26, enable the control system output pressure that back-pressure valve 26 is stable.Back-pressure valve 26 connects blow valve 27,
Blow valve 27 mainly adjusts the pressure of back-pressure valve 26, accurately reaches requirement of experiment so that back-pressure valve 26 controls pressure energy.
By increasing 2 bulk containers (the first bulk container 40, the second bulk container 41), arteries and veins can be shortened
Rush the testing time of damped method, improve impulse attenuation technology and be suitable for testing the permeability of low permeability reservoir, measurement range 0.1~
Between 0.01 × 10-3md, measurement range can be extended to 1md, or more big data acquisition system master using biggish air storage chamber
It to include data signal acquisition device 24, computer 25, gas flowmeter 38 and gas chromatographicanalyzer 37.Data signal acquisition device
24 with model system in the first first pressure sensor 12, the second second pressure sensor 14, third third pressure sensor 17,
4th the 4th pressure sensor 20 is connected, and is then connected with computer 25, and data signal acquisition device 24 is by the data of acquisition
It is transferred to the data acquisition module of computer 25, above-mentioned received data are shown the song that pressure changes over time by acquisition module
Line.Gas flowmeter 38 is connected with back-pressure valve 26, and gas flowmeter 38 measures the gas flow after simulation exploitation, rear input meter
The change curve between gas production and time can be obtained in data processing module in calculation machine.Gas chromatographicanalyzer 37 respectively with
Gas flowmeter 38 is connected with computer 25, and gas chromatograph 37 is used to analyze the composition of extraction gas, produces gas component analysis
As a result it is stored in computer 25.In computer 25 include data acquisition module, data processing module and data storage module, in conjunction with
In gas flow values input data processing module measured by gas flowmeter 38, it can analyze to obtain between pressure and time change
Relationship, each pressure difference and the relationship between the time, relationship between pressure and gas yield are closed between pressure difference and gas yield
System, the relation curves such as relationship between gas yield and time；Data storage module can be by the data of data collecting module collected
It is stored with the data of data processing module processing.
The utility model provides the method according to previous experiments unit simulation shale gas reservoir recovery process, including reality below
Test step:
1, experimental facilities is assembled according to the Experimental equipment of Fig. 1, experimental temperature is arranged to insulating box 39；
2, the first valve of outlet 21 in model system is closed, the gas of high-purity CH4 high pressure gas cylinder 5 is transferred in first
Between in container 3, with booster pump 8 to gas boosting in the first intermediate receptacle 3 to setting pressure, high-precision high voltage pump 1 is utilized to adjust
First intermediate receptacle, 3 pressure.After stablizing, inlet valve 11 is slowly opened, is transferred to high pressure gas slowly in core holding unit,
Work pressure test is carried out to experimental system, determines its leakproofness formedness；
3, model system is vacuumized using vacuum pump 10, first evacuated under conditions of low confining pressure, after use manual pump
23 gradually increase clamper confining pressure to requirement of experiment, and the sequence of pressurization is second full-hole core clamper 19, first complete
Diameter core holding unit 16, flat plate model core holding unit 13, evacuated time regard rock core size and determine, close after exhausting
Inlet valve 11 in model system；
4, the gas of He high pressure gas cylinder 5 is transferred in the first intermediate receptacle 3, is adjusted in first with high-precision high voltage pump 1
Between container 3 pressure.To after a period of stabilisation, first open blow valve 9, after excluding the air in pipeline, blow valve 9 is closed,
After stablizing, the initial volume value V1 of record high-precision high voltage pump slowly opens inlet valve 11, opens simultaneously the first valve of outlet
Door 21, makes high pressure gas slowly be transferred to the full-hole core of full-hole core clamper 16, second of core holding unit 13, first
In clamper 19.The bulking value V2 of high-precision high voltage pump is read after the system stabilizes, and the volume differences (V1-V2) of front and back are thick
The pore volume (dead volume including system: the error volume of line volume and instrument) of the shale core system of survey, can be used as
The free gas volume of shale core system；
5, the first valve 21 of outlet is closed, is evacuated according to step 3, while gas is transferred to first in N2 high pressure gas cylinder 32
Second intermediate receptacle 34, with booster pump 29 to the gas boosting in the one the second intermediate receptacles 34 to setting pressure after, use is high-precision
The pressure that high-pressure pump 36 adjusts intermediate receptacle is spent, experimental pressure is pressurized to, after stablizing, slowly opens the first third valve
28, it allows gas slowly full of the cavity in back-pressure valve 26, keeps the pressure of back-pressure valve 26 constant；
6, gas in high-purity CH4 high pressure gas cylinder 1 is transferred to the first intermediate receptacle 3, is pumped in 1 pair first using high-precision high voltage
Between in container 3 gas boosting the pressure of the first intermediate receptacle 3 is adjusted with high-precision high voltage pump 1, wait stablize one section to setting pressure
After time, blow valve 9 is first opened, after excluding the air in pipeline, closes blow valve 9, after stablizing, record high-precision high voltage pump
Initial volume value V3.The inlet valve 11 of model system is slowly opened, the first valve 21 of outlet is opened simultaneously, keeps gas slow
Slowly the rock being injected into the full-hole core clamper 19 of full-hole core clamper 16, second of core holding unit 13, first
It feels concerned about in system, in order to allow gas adequately to be spread and be adsorbed, relatively low, the time persistently injected can be arranged in confining pressure value
Depending on rock core size, 2-10 days time is generally required, until the volume of high-precision high voltage pump 1 no longer changes.Then
Inlet valve 11 is closed, allows gas sufficiently to be spread in rock core system, is adsorbed to the greatest extent, when diffusion continues
Between with injection the duration it is suitable, gradually increase confining pressure to requirement of experiment, the sequence of pressurization second with manual pump 23 in the process
Full-hole core clamper 19, first full-hole core clampers 16, flat plate model core holding units 13 open inlet valve
11, the pressure of entire model system is adjusted using high-precision high voltage pump 1, after whole system is stablized, record high-precision high voltage pump
Bulking value V4, the volume differences (V3-V4) of front and back are the tolerance of shale core system saturation, using equation of gas state meter
Calculate the volume for injecting gas under atmospheric pressure in entire shale core system, including absorption tolerance and free tolerance；
7, inlet valve 11 is closed, setting high-precision high voltage pumps 36 pressure value, adjusts the pressure of back-pressure valve 26, make back pressure
The pressure of valve 26 gradually decreases, after keeping back-pressure valve 26 to have certain pressure drop rate, gas flowmeter 38 to measure simulation exploitation
Gas flow records a data every 30 minutes time of record and gas production in the early stage, and rear input is at the data of computer 25
It manages in module, and is stored in the storage module of computer 25.The data acquisition module of computer 25 detects the first first pressure
The pressure of sensor 12, the second second pressure sensor 14, third third pressure sensor 17, the 4th the 4th pressure sensor 20
Variation, and the variation that pressure is put at any time is recorded, and be stored in the storage module of computer 25.The pressure value of back-pressure valve reduces
To after experimental pressure point, keeping high-precision high voltage to pump, 36 displacement pressure values are constant, and record gas production data point can be changed to 12 hours
Once, until outlet end does not have gas output；
8, the first third valve 28 is closed, the first valve 27 of emptying is opened, slowly lays down the pressure of back-pressure valve 26, record is adopted
Tolerance, record data point can be primary for 12 hours, until outlet end does not have gas output；
9, processing analysis is carried out using the data processing module in computer 25 to the data of record, it can analysis mode experiment
Entire trends exploitation process and withdrawal mechanism, relationship between the pressure-time in entire recovery process, pressure can be obtained
Relationship, the relationship between gas production-time etc. between relationship, pressure-gas production between difference-time, estimates shale rock
The volume of the remaining adsorbed gas of the heart.
The utility model experimental provision is other than for exploring shale gas reservoir trends exploitation rule, it may also be used for explores different
Mining phase extraction rule and percolation law, research and probe difference full-hole core combination seepage flow characteristics and to recovery ratio
Influence, and to different mining methods and improve recovery efficiency technique exploitation shale gas reservoir feasibility overall merit.
Example 2
First full-hole core clamper, 16, second full-hole core clampers 19 in Fig. 1 are become into straight-through mould
Formula becomes a kind of shale gas and adsorbs/parse experimental provision, including high-pressure air source system, injected system, model system, constant temperature
Case system, back pressure system and data collection system.High-pressure air source system therein, injected system, insulating box system, back pressure system
It is identical with shale gas reservoir exploitation simulated experiment apparatus part described in example 1 with data collection system, no longer it is described in detail.Model system
Inlet valve 11 in system is sequentially connected flat plate model core holding unit 13, the 7th valve 15 of outlet, first pressure sensor 12
Entrance and exit with second pressure sensor 14 respectively at flat plate model core holding unit 13 is connected, inlet valve 11 and note
The first intermediate receptacle 3 entered in system is connected, and it is to shale core in model system that inlet valve 11 is connect with return pump 10
Partial vacuum, the 7th valve 15 of outlet are connected with 26 entrance of back-pressure valve in back pressure system；Further include manual pump 23 successively
Six-way valve 22, core holding unit 13 are connected, manual pump 23 is mainly that flat plate model core holding unit 13 provides radial confining pressure (pressure transmission
Medium is hydraulic oil), simulate the burden pressure variation in actual formation.Plate rock is wherein used in flat plate model core holding unit
The geometric dimension (length × width x thickness) of the heart is 200mm × 200mm × (50-100) mm, and plate rock core is artificial or shale rock of appearing
The heart, in rubber sleeve, rubber sleeve is located in clamper plate rock core.The plate rock core of use descends two sides using measure on it
The crack for generating certain depth and width is in a degree of opening under low confining pressure, in a degree of under high confining pressure
Closed state, in order to the sufficient adsorbed gas of shale core.
The utility model, which is provided, studies large scale shale core absorption/parsing rule method according to previous experiments device,
Including experimental procedure below:
1, first full-hole core clamper, 16, second full-hole core clampers 19 in Fig. 1 are become straight-through
Experimental temperature is arranged to insulating box 39 in mode；
2, the 7th valve 15 of outlet in model system is closed, the gas of high-purity CH4 high pressure gas cylinder 5 is transferred in first
Between in container 3, with booster pump 8 to gas boosting in the first intermediate receptacle 3 to setting pressure, high-precision high voltage pump 1 is utilized to adjust
First intermediate receptacle, 3 pressure.After stablizing, inlet valve 11 is slowly opened, is transferred to high pressure gas slowly in core holding unit,
Work pressure test is carried out to experimental system, determines its leakproofness formedness；
3, model system is vacuumized using vacuum pump 10, is evacuated under conditions of present low confining pressure, after use manual pump
23 gradually increase the confining pressure of flat plate model core holding unit to requirement of experiment, and evacuated time view rock core size determines, exhausts
The inlet valve 11 in model system is closed later；
4, the gas of He high pressure gas cylinder 5 is transferred in the first intermediate receptacle 3, is adjusted in first with high-precision high voltage pump 1
Between container 3 pressure.To after a period of stabilisation, first open blow valve 9, after excluding the air in pipeline, blow valve 9 is closed,
After stablizing, the initial volume value V ' 1 of record high-precision high voltage pump.Inlet valve 11 is slowly opened, outlet the 7th is opened simultaneously
Valve 15 is transferred to high pressure gas slowly in flat plate model core holding unit 13, reads high-precision high voltage pump after the system stabilizes
Bulking value V ' 2, the volume differences (V ' 1-V ' 2) of front and back are pore volume (including the system of the shale core system of bigness scale
Dead volume: the error volume of line volume and instrument), can be used as the error volume of laboratory apparatus；
5, the 7th valve 15 of outlet is closed, is evacuated according to step 3, while gas is transferred to first in N2 high pressure gas cylinder 32
Second intermediate receptacle 34, with booster pump 29 to the gas boosting in the one the second intermediate receptacles 34 to setting pressure after, use is high-precision
The pressure that high-pressure pump 36 adjusts intermediate receptacle is spent, experimental pressure is pressurized to, after stablizing, slowly opens the first third valve
28, it allows gas slowly full of the cavity in back-pressure valve 26, keeps the pressure of back-pressure valve 26 constant；
6, gas in high-purity CH4 high pressure gas cylinder 1 is transferred to the first intermediate receptacle 3, is pumped in 1 pair first using high-precision high voltage
Between in container 3 gas boosting the pressure of the first intermediate receptacle 3 is adjusted with high-precision high voltage pump 1 to setting pressure.Wait stablize one section
After time, blow valve 9 is first opened, after excluding the air in pipeline, closes blow valve 9, after stablizing, record high-precision high voltage pump
Initial volume value V ' 3.The inlet valve 11 of model system is slowly opened, the 7th valve 15 of outlet is opened simultaneously, makes gas
It is slowly injected into the rock core system in flat plate model core holding unit 13, in order to allow gas adequately to be spread and be adsorbed,
Can be relatively low by the setting of confining pressure value, the time persistently injected depending on rock core size, generally requires 2-10 days time, until
Until the volume of high-precision high voltage pump 1 no longer changes.It is then shut off inlet valve 11, gas is allowed to obtain in rock core system sufficiently
Diffusion, is adsorbed to the greatest extent, and the diffusion duration is suitable with the injection duration, in the process gradually with manual pump 23
Increase the confining pressure of flat plate model core holding unit 13 to requirement of experiment, opens inlet valve 11, adjusted using high-precision high voltage pump 1
The pressure of entire model system records high-precision high voltage pump housing product value V ' 4, the volume differences of front and back after whole system is stablized
(V ' 3-V ' 4) is the tolerance of shale core system saturation, calculates entire shale under atmospheric pressure using the equation of gas state
The volume that gas is injected in rock core system, calculates the adsorbance of shale core at this pressure；7, it is pumped using high-precision high voltage
1 continues to be pressurized to intermediate receptacle next experimental pressure, repeats step 6, until testing maximum pressure；
8, inlet valve 11 is closed, setting high-precision high voltage pumps 36 pressure value, adjusts the pressure of back-pressure valve 26, make back pressure
The pressure of valve 26 gradually decreases, after keeping back-pressure valve 26 to have certain pressure drop rate, gas flowmeter 38 to measure simulation exploitation
Gas flow records a data every 30 minutes time of record and gas production in the early stage, and rear input is at the data of computer 25
It manages in module, and is stored in the storage module of computer 25.The data acquisition module of computer 25 detects each pressure sensing
The pressure change of device (12,14), and record pressure and change with time, and be stored in the storage module of computer 25.Back pressure
After the pressure value of valve is reduced to experimental pressure point, keeps high-precision high voltage 36 displacement pressure values of pump constant, record gas production data
Point can be changed to 12 hours once, until outlet end does not have gas output；
9, continue the pressure of reduction back-pressure valve 26 to next experimental pressure, step 8 is repeated, until minimum experimental pressure；
10, processing analysis is carried out using the data processing module in computer 25 to the data of record, each reality can be obtained
The adsorbance and parsing amount for the large scale shale core tested under pressure spot change with time and the suction of large scale shale core
Attached amount and parsing amount are with the change procedure of pressure, i.e. adsorpting characteristic curve and parsing indicatrix.
The utility model experimental provision is in addition to the absorption for studying CH4 gas in large scale shale core/parsing rule
Outside, absorption/parsing rule of other gases in large scale shale core can be also studied, and studies large scale shale core
The resolution factor of CH4 gas, if rate of temperature change grinds CH4 gas resolution factor, research of the injecting CO 2 to CH4 gas resolution factor is put down
Plate shale rock core upper and lower surface different length, the influence of depth and width to CH4 gas resolution factor etc..
It is understood that the restriction of the not structure paired systems of system structure shown in figure, may include than illustrating more
More or less equipment perhaps combines certain equipment or different deployed with devices.More than, only the utility model is specific
Embodiment, but protection scope of the utility model is not limited thereto, and anyone skilled in the art is at this
In the technical scope that utility model discloses, it can easily think of the change or the replacement, should all cover in the protection scope of the utility model
Within.Therefore, the protection scope of the utility model should be subject to the protection scope in claims.
Claims (3)
1. a kind of shale gas reservoir exploits novel analog experimental provision, which is characterized in that including high-pressure air source system, injected system,
Model system, insulating box system, back pressure system and the data collection system for collection model system data form, the injection
System, model system, back pressure system are sequentially connected；The high-pressure air source system be respectively injected system the first intermediate receptacle,
Second intermediate receptacle of back pressure system provides high pressure gas；It include the first intermediate receptacle and the first large volume in the injected system
Container, the core holding unit in the second intermediate receptacle and model system in injected system are located in insulating box；
High-precision high voltage displacement pump (1) in injected system is sequentially connected the first bulk container (40), the first valve (2), the
One intermediate receptacle (3), the first intermediate receptacle (3) upper end the second valve (4), emptying valve (9), model system inlet valve
(11), the first intermediate receptacle (3) upper end is connected with the inlet valve of model system, the first intermediate receptacle (3) lower end with it is high-precision
Degree high pressure displacement pump (1) is connected；
Back-pressure valve (26) in back pressure system is sequentially connected blow valve (27), third valve (28), the second intermediate receptacle (34)
Upper end valve (33), the second intermediate receptacle (34), the 4th valve (35) of lower end of the second intermediate receptacle (34), the second large volume are held
Device (41), high-precision high voltage pump (36), back-pressure valve (26) entrance are connected with the outlet valve (21) in model system, back-pressure valve
(26) outlet is connected with the gas flowmeter (38) of data collection system, the second intermediate receptacle (34) upper end and back-pressure valve (26)
It is connected, the second intermediate receptacle (34) lower end is connected with high-precision high voltage pump (36).
2. shale gas reservoir according to claim 1 exploits novel analog experimental provision, which is characterized in that model system includes
One entrance and exit, entrance are connected with injected system, and outlet is connected with back pressure system, the pressure sensing in model system
Device is connected with data collection system, and model system includes 3 core holding unit devices: flat plate model core holding unit, first
A full-hole core clamper, second full-hole core clamper.
3. shale gas reservoir according to claim 1 exploits novel analog experimental provision, which is characterized in that high-purity CH4/CO2/
He high pressure gas cylinder (5) be sequentially connected the 5th valve (6), the first booster pump (8), injected system the first intermediate receptacle (3), N2 high
Air bottle (32) be sequentially connected the 6th valve (31), the second booster pump (29), back pressure system the second intermediate receptacle (34)；First
Booster pump (8) is connected with the first air compressor (7), the first booster pump (8) one end and high-purity CH4/CO2/He high pressure gas cylinder
(5) it connects, one end is connect with the first intermediate receptacle (3)；Inlet valve (11) be sequentially connected flat plate model core holding unit (13),
7th valve (15), first full-hole core clamper (16), the 8th valve (18), second full-hole core clamper
(19), outlet valve (21), first pressure sensor (12) and second pressure sensor (14) are pressed from both sides respectively at flat plate model rock core
The entrance and exit of holder (13) is connected, and third pressure sensor (17) goes out with first full-hole core clamper (16)
Mouth is connected, and the 4th pressure sensor (20) is connected with the outlet of second full-hole core clamper (19)；
Second booster pump (29) is connected with the second air compressor (30), the second booster pump (29) one end and N2 high pressure gas cylinder
(32) it connects, one end is connect with the second intermediate receptacle (34)；Inlet valve (11) is sequentially connected flat plate model core holding unit
(13), the 7th valve (15), first full-hole core clamper (16), the 8th valve (18), second full-hole core folder
Holder (19), outlet valve (21).
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| CN201721444125.9U CN208433157U (en) | 2017-11-01 | 2017-11-01 | A kind of shale gas reservoir exploitation novel analog experimental provision |
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| CN201721444125.9U CN208433157U (en) | 2017-11-01 | 2017-11-01 | A kind of shale gas reservoir exploitation novel analog experimental provision |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111398566A (en) * | 2020-04-15 | 2020-07-10 | 北京艾迪佳业技术开发有限公司 | Multifunctional rock core displacement simulation experiment system |
| CN115494163A (en) * | 2021-06-17 | 2022-12-20 | 中国石油化工股份有限公司 | System and method for determining gas-gas diffusion coefficient in gas reservoir |
| CN117746729A (en) * | 2023-12-21 | 2024-03-22 | 西南石油大学 | System and method for simulating natural gas foam composite oil displacement dynamic law through double pipes |
-
2017
- 2017-11-01 CN CN201721444125.9U patent/CN208433157U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111398566A (en) * | 2020-04-15 | 2020-07-10 | 北京艾迪佳业技术开发有限公司 | Multifunctional rock core displacement simulation experiment system |
| CN115494163A (en) * | 2021-06-17 | 2022-12-20 | 中国石油化工股份有限公司 | System and method for determining gas-gas diffusion coefficient in gas reservoir |
| CN115494163B (en) * | 2021-06-17 | 2024-05-14 | 中国石油化工股份有限公司 | System and method for determining gas-gas diffusion coefficient in gas reservoir |
| CN117746729A (en) * | 2023-12-21 | 2024-03-22 | 西南石油大学 | System and method for simulating natural gas foam composite oil displacement dynamic law through double pipes |
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