CN209148501U - Rock Biot coefficient experimental provision is tested under a kind of confining pressure-temperature action - Google Patents
Rock Biot coefficient experimental provision is tested under a kind of confining pressure-temperature action Download PDFInfo
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- CN209148501U CN209148501U CN201821767822.2U CN201821767822U CN209148501U CN 209148501 U CN209148501 U CN 209148501U CN 201821767822 U CN201821767822 U CN 201821767822U CN 209148501 U CN209148501 U CN 209148501U
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Abstract
The utility model belongs to test rock Biot coefficient experiment equipment technology field, discloses and tests rock Biot coefficient experimental provision under a kind of confining pressure-temperature action, is provided with high-pressure gas cylinder；High-pressure gas cylinder is connect by tracheae with the first valve, and the first valve is connect by tracheae with low pressure storage cylinder, and low pressure storage cylinder is connect by tracheae with the second valve；Low pressure storage cylinder is connect by tracheae with barometer and third valve, and third valve is connect by tracheae with pressure chamber by tracheae and the 4th valve, the 5th valve, the 4th valve, the 5th valve；Pressure chamber is placed on insulating box, and pressure chamber is placed with rock sample, and rock sample side is pasted with 4 pieces of foil gauges, and laterally longitudinal each two pieces, foil gauge is connect by conducting wire with LabVIEW strain testing module, and LabVIEW strain testing module is connect by conducting wire with computer.The utility model can be with automatic data collection, high confining pressure high-precision.
Description
Technical field
The utility model belongs to test rock Biot coefficient experiment equipment technology field more particularly to a kind of confining pressure-temperature
Effect is lower to test rock Biot coefficient experimental provision.
Background technique
Currently, the prior art commonly used in the trade is such that
The Biot coefficient of rock is an important parameter for reflecting rock porous media property.Currently used test method
There are Cross-plotting method, the way of drainage experiment and wow flutter state method etc., the experimental provision and sheet that wherein the way of drainage experiment uses
Experimental provision is close.
In conclusion problem of the existing technology is:
The Biot coefficient general test value fluctuation of existing experimental provision and method test rock is larger, and precision is not high, right
In the lower tight rock of permeability smaller porosity, the limitation of the above method is difficult to realize test.Similar in other
It is all relatively simple for experimental condition using the test device of pressure chamber, do not account for the Biot coefficient under temperature action
Test.
Solve the meaning of above-mentioned technical problem:
This experimental provision applies pore pressure using inert gas, equally applicable for low permeability and low porosity gap rate tight rock；
Using high-precision barometer and confining pressure servo instrument, measurement accuracy is high；It is tried using foil gauge and LabVIEW strain testing module testing
Sample deformation, as a result more directly effectively；In addition, the present apparatus can test rock Biot system under different confining pressures-temperature collective effect
Several differentiation.
Utility model content
In view of the problems of the existing technology, the utility model provides and tests rock under a kind of confining pressure-temperature action
Biot coefficient experimental provision.
It is set the utility model is realized in this way testing rock Biot coefficient experimental provision under a kind of confining pressure-temperature action
It is equipped with:
High-pressure gas cylinder；
High-pressure gas cylinder is connect by tracheae with the first valve, and the first valve is connect by tracheae with low pressure storage cylinder, low
Pressure storage cylinder is connect by tracheae with the second valve；
Low pressure storage cylinder is connect by tracheae with barometer and third valve, third valve pass through tracheae and the 4th valve,
5th valve, the 4th valve, the 5th valve are connect by tracheae with pressure chamber, and pressure chamber is placed on insulating box, and pressure chamber is placed
There is rock sample, rock sample side is pasted with four pieces of foil gauges, and laterally longitudinal each two pieces, foil gauge is surveyed by conducting wire and LabVIEW strain
The connection of die trial block, LabVIEW strain testing module are connect by conducting wire with computer.
Further, rubber bush is wrapped up outside the rock sample and with steel ring fixing seal.
Further, the confining pressure servopump is connect by conduit with pressure chamber, and pressure chamber is full of pressure oil, with screw rod and spiral shell
Mother is fixed.
Further, the pressure chamber has been bolted temperature sensor.
In conclusion advantages of the present invention and good effect are as follows:
The utility model test rock is in extensive range, including fine and close low porosity rock.
The rock sample of the utility model can be for as former state, or internal after stress or high-temperature process crack rock occur
Sample.
The test temperature of the utility model can be between 20-90 DEG C.
The high confining pressure high-precision of the utility model, reaches as high as 60MPa, precision ± 0.1MPa.
The utility model is used can be with automatic data collection.
Detailed description of the invention
Fig. 1 is test rock Biot coefficient experimental provision knot under confining pressure-temperature action provided by the embodiment of the utility model
Structure schematic diagram.
In figure: 1, high-pressure gas cylinder；2, low pressure storage cylinder；3, barometer；4, confining pressure servopump；5, temperature sensor；6,
Pressure chamber；7, insulating box；8, computer；9, LabVIEW strain testing module；10, the first valve；11, the second valve；12,
Three valves；13, the 4th valve；14, the 5th valve.
Specific embodiment
For the invention, features and effects that can further appreciate that the utility model, the following examples are hereby given, and cooperates
Detailed description are as follows for attached drawing.
The structure of the utility model is explained in detail with reference to the accompanying drawing.
As shown in Figure 1, testing rock Biot coefficient experiment dress under confining pressure-temperature action provided by the embodiment of the utility model
Set includes: high-pressure gas cylinder 1, low pressure storage cylinder 2, barometer 3, confining pressure servopump 4, temperature sensor 5, pressure chamber 6, insulating box
7, computer 8, LabVIEW strain testing module 9, the first valve 10, the second valve 11, third valve 12, the 4th valve 13,
Five valves 14.
High-pressure gas cylinder 1 is connect by tracheae with the first valve 10, and the first valve 10 is connected by tracheae and low pressure storage cylinder 2
It connects, low pressure storage cylinder 2 is connect by tracheae with the second valve 11, and low pressure storage cylinder 2 passes through tracheae and barometer 3 and third valve
12 connections, for third valve 12 by tracheae and the 4th valve 13, the 5th valve 14, the 4th valve 13, the 5th valve 14 pass through gas
Pipe is connect with pressure chamber 6, and confining pressure servopump 4 is connect by conduit with pressure chamber 6, and pressure chamber 6 is full of pressure oil, screw rod and nut
Fixed, pressure chamber 6 is placed on insulating box 7, and pressure chamber 6 is placed with rock sample, and rock sample side pastes 4 pieces of foil gauge, laterally longitudinal each
Two pieces, rubber bush is wrapped up outside rock sample and uses steel ring fixing seal, foil gauge passes through conducting wire and LabVIEW strain testing module 9
Connection, pressure chamber 6 have been bolted temperature sensor 5, and LabVIEW strain testing module 9 is connected by conducting wire and computer 8
It connects.
It is further described below with reference to structure of the specific experiment to the utility model.
Step 1, rock sample preparation, rock sample size ratio of height to diameter are generally 2:1, and rock sample diameter can be 20,37,50,65mm, right
Various sizes of pressure indoor should be used；
Step 2, strain gauge adhesion, rock sample side paste 4 pieces of foil gauge, and laterally longitudinal each two pieces；
Step 3, rock sample installation wrap up rubber bush outside rock sample and with steel ring fixing seal, and foil gauge wiring and strain are adopted
Storage wiring connects；
Step 4, pressure chamber are installed, and pressure oil is full of in pressure chamber, is fixed, is placed in insulating box with screw rod and nut；
Step 5, temperature setting, setting insulating box is test requirements document temperature, and oven heat can by temperature sensor
To learn oil temperature in pressure chamber, kept for the sufficiently long time to guarantee that rock sample reaches test requirements document temperature；
Step 6 loads confining pressure, is loaded onto test requirements document confining pressure value Pc using confining pressure servopump (precision 0.1MPa)1, and
Keep certain time so that oil temperature and confined pressure steady.It is accordingly answered by LabVIEW strain testing module and computer record at this time
Become and calculates body strain value ε1；
Step 7 unloads part confining pressure, unloads part confining pressure to Pc by confining pressure servopump2, record and accordingly strain and count
Calculate body strain value ε2；
Step 8 is reloaded, and reloads confining pressure to Pc1, record and accordingly strain and calculate body strain value ε3。
Step 9 loads pore pressure, rock sample inner pore pressure Pi before loading1=0, all valves are in pass before loading
Closed state slowly opens the first valve, flows into inert gas in high pressure tank (generally selecting argon gas) in low pressure gasholder,
Air pressure in low pressure gasholder can be read by barometer (precision 0.1kPa), the first valve is closed, slowly opens the second valve
It is down to air pressure slightly larger than Δ Pc=Pc1-Pc2, inject rock sample air pressure and be denoted as Pi2(note: Pi2Confining pressure Pc cannot be greater than1), it closes
The second valve is closed, third valve, the 4th valve and the 5th valve are successively opened, loads identical Pore Pressure simultaneously from test specimen two ends
Power Pi2, the first valve is adjusted again and the second valve makes Pi2=Δ Pi=Δ Pc.Keep enough depending on rock sample permeability size
Time, to guarantee to reach inside rock sample consistent pore pressure, record accordingly strains and calculates body strain value ε4；
Step 10 calculates Biot coefficient, at this time Biot coefficient b=(ε4-ε3)/(ε2-ε1)；
The working principle of the utility model are as follows:
Rock sample is placed in pressure chamber, pressure chamber is placed in insulating box, under different confining pressures and temperature action, uses inertia
Gas applies pore pressure to rock sample inside, and the Biot coefficient of rock is calculated by record rock sample deformation.In step 6 and step
In seven, bulk modulus Kb=Δ Pc/ Δ ε=(Pc of available rock1-Pc2)/(ε2-ε1), in step 8 and step 9,
Solid skeletal deformation modulus H=Δ Pi/ Δ ε=(Pi of available rock1-Pi2)/(ε4-ε3), because of Δ Pc=Δ Pi herein,
According to principle of effective stress, available Biot coefficient b=Kb/H=(ε 4- ε 3)/(ε 2- ε 1).Under same temperature effect, change
Become confining pressure Pc1Size and keep Δ Pc=Δ Pi constant, it can be deduced that same temperature difference confining pressure acts on lower Biot coefficient
Evolution；Change test temperature, repeats above step, available rock sample Biot coefficient under confining pressure-temperature collective effect
Development law.
The above is only the preferred embodiment to the utility model, is not made in any form to the utility model
Limitation, it is all according to the technical essence of the utility model any simple modification made to the above embodiment, equivalent variations with
Modification, is all within the scope of the technical scheme of the utility model.
Claims (3)
1. testing rock Biot coefficient experimental provision under a kind of confining pressure-temperature action, which is characterized in that the confining pressure-temperature
The lower test rock Biot coefficient experimental provision of effect is provided with
High-pressure gas cylinder；
High-pressure gas cylinder is connect by tracheae with the first valve, and the first valve is connect by tracheae with low pressure storage cylinder, low pressure storage
Gas cylinder is connect by tracheae with the second valve；
Low pressure storage cylinder is connect by tracheae with barometer and third valve, and third valve passes through tracheae and the 4th valve, the 5th
Valve, the 4th valve, the 5th valve are connect by tracheae with pressure chamber；
Pressure chamber is placed on insulating box, and pressure chamber is placed with rock sample, and rock sample side is pasted with 4 pieces of foil gauges, laterally longitudinal direction each two
Piece, foil gauge is connect by conducting wire with LabVIEW strain testing module, and LabVIEW strain testing module is by conducting wire and calculates
Machine connection；
Confining pressure servopump is connect by conduit with pressure chamber, and pressure chamber is full of pressure oil, is fixed with screw rod and nut.
2. testing rock Biot coefficient experimental provision under confining pressure-temperature action as described in claim 1, which is characterized in that institute
It states and wraps up rubber bush outside rock sample and with steel ring fixing seal.
3. testing rock Biot coefficient experimental provision under confining pressure-temperature action as described in claim 1, which is characterized in that institute
It states pressure chamber and has been bolted temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821767822.2U CN209148501U (en) | 2018-10-25 | 2018-10-25 | Rock Biot coefficient experimental provision is tested under a kind of confining pressure-temperature action |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821767822.2U CN209148501U (en) | 2018-10-25 | 2018-10-25 | Rock Biot coefficient experimental provision is tested under a kind of confining pressure-temperature action |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209148501U true CN209148501U (en) | 2019-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821767822.2U Expired - Fee Related CN209148501U (en) | 2018-10-25 | 2018-10-25 | Rock Biot coefficient experimental provision is tested under a kind of confining pressure-temperature action |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112903740A (en) * | 2021-01-22 | 2021-06-04 | 中国石油大学(华东) | Device and method for measuring thermal expansion coefficient of rock under confining pressure |
| CN114076820A (en) * | 2020-08-13 | 2022-02-22 | 中国石油天然气集团有限公司 | Test method for measuring Biot coefficient of cement stone |
| CN116429663A (en) * | 2023-06-08 | 2023-07-14 | 太原理工大学 | Device and method for measuring radon gas seepage rate in coal-rock medium |
-
2018
- 2018-10-25 CN CN201821767822.2U patent/CN209148501U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114076820A (en) * | 2020-08-13 | 2022-02-22 | 中国石油天然气集团有限公司 | Test method for measuring Biot coefficient of cement stone |
| CN112903740A (en) * | 2021-01-22 | 2021-06-04 | 中国石油大学(华东) | Device and method for measuring thermal expansion coefficient of rock under confining pressure |
| CN116429663A (en) * | 2023-06-08 | 2023-07-14 | 太原理工大学 | Device and method for measuring radon gas seepage rate in coal-rock medium |
| CN116429663B (en) * | 2023-06-08 | 2023-09-12 | 太原理工大学 | Device and method for measuring radon gas seepage rate in coal-rock medium |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190723 Termination date: 20201025 |
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| CF01 | Termination of patent right due to non-payment of annual fee |