CN217332081U - CO in rock chemical corrosion environment 2 Triaxial seepage test system - Google Patents
CO in rock chemical corrosion environment 2 Triaxial seepage test system Download PDFInfo
- Publication number
- CN217332081U CN217332081U CN202122926796.1U CN202122926796U CN217332081U CN 217332081 U CN217332081 U CN 217332081U CN 202122926796 U CN202122926796 U CN 202122926796U CN 217332081 U CN217332081 U CN 217332081U
- Authority
- CN
- China
- Prior art keywords
- pressure
- gas
- pressure chamber
- rock
- rock sample
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses CO in a rock chemical corrosion environment 2 Triaxial seepage flow test system, including pressure chamber, gaseous pressure boost system, bias pressure pump, confined pressure pump, exhaust system and pressure test device, wherein: the bottom in the pressure chamber is provided with a platform, a rock sample is placed on the platform, the top in the pressure chamber is provided with an axial dowel bar, the lower end of the axial dowel bar is connectedThe lower end of the pressure head is contacted with the top of the rock sample; annular strain gauges are arranged on the rock sample in the circumferential direction, and axial strain gauges are arranged on two sides of the rock sample; the gas pressurization system is connected with an air inlet hole at the bottom of the rock sample through a pipeline; the exhaust system is connected with an air outlet hole at the top of the rock sample through a pipeline; the bias pressure pump is connected with the top of the pressure chamber; the confining pressure pump is connected with the bottom of the pressure chamber. The invention can develop rock CO under different chemical corrosion conditions 2 And the penetration test realizes the accurate test of the permeability of the rock material under different confining pressures, bias pressures and gas penetration pressures, and has important engineering practice significance.
Description
Technical Field
The invention relates to the field of rock mechanics and engineering, in particular to CO in a rock chemical corrosion environment 2 Triaxial seepage flow test system.
Background
With the development of human industrialization, greenhouse gases are gradually increased, resulting in global warming. Carbon dioxide (CO) 2 ) The effect accounts for more than 60% of all greenhouse gases and is the main factor of greenhouse effect. The deep saline water layer is one of the most promising geological sequestration ways at present. Thus, the saline water layer surrounding rock CO 2 Permeability is an index for evaluating whether a rock mass has a condition for sequestration. And also. Deep rock is in complicated geological conditions and the rock mass is subject to inhomogeneityChemical concentration corrosion damage effect, and effectively tests CO of the enclosed rock sealed and stored under the chemical corrosion effect 2 The permeability is an important basis for evaluating the safety and feasibility of engineering. At present, in the market, a water permeability testing device is mostly adopted to test the permeability of materials such as rock concrete, and an inert gas is mostly adopted to test the permeability of low-permeability rocks in the gas permeability test, so that how to accurately and effectively test rock CO in a chemical corrosion environment 2 Seepage testing has not been studied.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide CO in a rock chemical corrosion environment 2 The triaxial seepage test system is used for realizing permeability test of rocks under different bias pressure, confining pressure and seepage pressure conditions under the action of chemical corrosion damage.
CO in rock chemical corrosion environment 2 Triaxial seepage flow test system, including pressure chamber, gaseous pressure boost system, bias pressure pump, confined pressure pump, exhaust system and pressure test device, wherein:
a platform is arranged at the bottom in the pressure chamber, a rock sample is placed on the platform, an axial dowel bar is arranged at the top in the pressure chamber, the lower end of the axial dowel bar is connected with a pressure head, and the lower end of the pressure head is in contact with the top of the rock sample; annular strain gauges are arranged on the rock sample in the circumferential direction, axial strain gauges are arranged on two sides of the rock sample, the upper ends of the axial strain gauges are fixed with a pressure head, and the lower ends of the axial strain gauges are fixed with the bottom of a pressure chamber;
the gas pressurization system is connected with an air inlet hole at the bottom of the rock sample through a pipeline;
the exhaust system is connected with an air outlet hole in the top of the rock sample through a pipeline;
the bias pressure pump is connected with the top of the pressure chamber;
the confining pressure pump is connected with the bottom of the pressure chamber.
The gas pressurization system comprises CO sequentially connected through plastic pipes 2 Gas cylinder, gas booster pump, gas buffer, CO 2 A first valve is arranged in the plastic pipe between the gas cylinder and the gas booster pump, the gas booster pump is connected with an air compressor, and a second valve is arranged between the gas booster pump and the air compressorThe outlet of the gas buffer is connected with the gas inlet, and a pressure gauge and a pressure reducing valve are arranged in a plastic pipe between the gas buffer and the gas inlet.
The exhaust system comprises a gas-liquid separator connected with the air outlet, and the gas-liquid separator is sequentially connected with a third valve, a dryer, a first gas flowmeter, a second gas flowmeter and a third gas flowmeter through pipelines.
And a fourth valve and a bias pressure sensor are arranged in a connecting pipeline of the bias pressure pump and the pressure chamber.
And a fifth valve and a confining pressure sensor are arranged in a connecting pipeline of the confining pressure pump and the pressure chamber.
The lower end of the pressure head is provided with a rubber sleeve.
The outside pressure chamber is provided with the outside steel sheet of pressure chamber, axial dowel bar upper end is provided with the axial and passes the pressure head, and axial pass pressure head upper end is connected with the steel pole, and the outside steel sheet of pressure chamber at pressure chamber top is worn out to the steel pole to it is fixed through the nut.
And a sealing ring is arranged on the axial force transmission pressure head.
Has the advantages that: the invention realizes rock CO through design 2 And the gas test under the triaxial stress state of the rock in the chemical corrosion environment in actual engineering can be carried out through penetration test measurement, so that the mechanical property of the rock under the deep complex geological condition can be known, and a test basis is provided for engineering construction and design.
Drawings
FIG. 1 shows CO in rock chemical corrosion environment of the invention 2 The structure of the triaxial seepage test system is schematically shown.
In the figure: 1. CO 2 2 A gas cylinder; 2. a first valve; 3. a plastic tube; 4. a gas booster pump; 5. a second valve; 6. an air compressor; 7. a gas buffer; 8. a pressure reducing valve; 9. a pressure gauge; 10. a platform; 11. an axial strain gauge; 12. an air intake; 13. rock sample, 14, rubber sleeve; 15. a circumferential strain gauge; 16. an air outlet; 17. a pressure head; 18. an axial dowel bar; 19. a pressure chamber; 20. a seal ring; 21. an axial force transmission pressure head; 22. a steel rod; 23. outside pressure chamberA partial steel plate; 24. a nut; 25. a gas-liquid separator; 26. a third valve; 27. a dryer; 28. a first gas flow meter; 29. a second gas flow meter; 30. a third gas flow meter; 31. a fourth valve; 32. a biased pressure pump; 33. a fifth valve; 34. a confining pressure pump; 35. a gas pressure sensor; 36. a bias pressure sensor; 37. confining pressure sensor.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in figure 1, the invention relates to CO in rock chemical corrosion environment 2 A triaxial seepage test system comprising a pressure chamber 19, a gas pressurization system, a bias pressure pump 32, a confining pressure pump 34, an exhaust system and a pressure test device, wherein:
a platform 10 is arranged at the bottom in the pressure chamber 19, a rock sample 13 is placed on the platform 10, an axial dowel bar 18 is arranged at the top in the pressure chamber 19, the lower end of the axial dowel bar 18 is connected with a pressure head 17, and the lower end of the pressure head 17 is in contact with the top of the rock sample 13; an annular strain gauge 15 is arranged on the rock sample 13 in the circumferential direction, axial strain gauges 11 are arranged on two sides of the rock sample 13, the upper ends of the axial strain gauges 11 are fixed with a pressure head 17, and the lower ends of the axial strain gauges are fixed with the bottom of a pressure chamber 19; the lower end of the pressure head 17 is provided with a rubber sleeve 14. The outside steel sheet 23 of pressure chamber is provided with in the pressure chamber 19 outside, and axial dowel bar 18 upper end is provided with axial biography power pressure head 21, and axial biography power pressure head 21 upper end is connected with steel pole 22, and steel pole 22 wears out the outside steel sheet 23 of pressure chamber at pressure chamber 19 top to fix through nut 24. The axial force transmission pressure head 21 is provided with a sealing ring 20.
The gas pressurization system comprises CO sequentially connected through plastic pipes 3 2 Gas cylinder 1, gas booster pump 4, gas buffer 7, CO 2 A first valve 2 is arranged in a plastic pipe 3 between a gas cylinder 1 and a gas booster pump 4, the gas booster pump 4 is connected with an air compressor 6, a second valve 5 is arranged between the gas booster pump 4 and the air compressor 6, an outlet of a gas buffer 7 is connected with an air inlet 12 at the bottom of a rock sample 13, and a pressure gauge 9 and a pressure reducing valve 8 are arranged in the plastic pipe 3 between the gas buffer 7 and the air inlet 12.
The exhaust system comprises a gas-liquid separator 25 connected with the gas outlet 16 at the top of the rock sample 13, and the gas-liquid separator 25 is sequentially connected with a third valve 26, a dryer 27, a first gas flowmeter 28, a second gas flowmeter 29 and a third gas flowmeter 30 through pipelines.
A bias pressure pump 32 is connected with the top of the pressure chamber 19; a fourth valve 31 and a bias pressure sensor 36 are provided in a connecting line of the bias pressure pump 32 and the pressure chamber 19.
The confining pressure pump 34 is connected with the bottom of the pressure chamber 19; a fifth valve 33 and a confining pressure sensor 37 are arranged in a connecting pipeline of the confining pressure pump 34 and the pressure chamber 19.
One end of the gas booster pump and CO 2 The gas cylinder is connected with the air compressor, the other end of the gas cylinder is connected with the gas buffer, gas pressure is provided through the gas pressure pump and the air compressor, and the gas pressure can be measured through the gas pressure sensor.
The pressure chamber adopts a hydraulic environment, the axial pressure adopts confining pressure and bias pressure, wherein the bias pressure is controlled by an axial force transmission device, and the separation of the pressure chamber and a bias pressure area is ensured by a sealing ring.
The method comprises the following steps that a rubber sleeve, a rock sample, a pressure head and a platform are fixed in a pressure chamber by adopting a steel ring, the rock sample is separated from surrounding hydraulic oil by adopting the rubber sleeve, axial deformers are arranged on two sides of the pressure head, and annular strain gauges are arranged in the middle of the rock sample to monitor axial deformation and annular deformation respectively;
an air inlet hole 12 at the bottom of the rock sample 13 is arranged in the center of the pressure chamber platform, and an air outlet hole 16 at the top of the rock sample 13 is arranged in the center of the pressure head and is respectively connected with an external gas infiltration system and an exhaust system.
The utility model discloses a CO under rock chemical corrosion environment 2 The working process of the triaxial seepage test system is as follows:
(1) by HNO 3 Preparing neutral, weakly acidic and strongly acidic solutions with different pH values from distilled water and NaCl, and soaking the cylindrical rock sample to obtain rock samples under different chemical corrosion environments;
(2) installing the rock sample 13 into the pressure chamber 19, closing the reducing valve 8 and the fourth valve 31, opening the fifth valve 33, and filling oil into the pressure chamber 19 through the confining pressure pump 34 until the pressure chamber 19 is full of oil;
(3) keeping the ambient pressure constant, opening the fourth valve 31, and applying bias voltage to different stress levels;
(4) then keeping the confining pressure and the bias constant, opening the reducing valve 8 and the third valve 26, and injecting CO into the rock sample 13 2 Gas, the pressure level of the gas is controlled by the gas booster pump 4, and the data of the first gas flowmeter 28, the second gas flowmeter 29 and the third gas flowmeter 30 are recorded;
(5) calculating the CO of the sample under different stress levels and air pressures 2 And (3) permeability.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (8)
1. CO in rock chemical corrosion environment 2 Triaxial seepage flow test system, its characterized in that: comprises a pressure chamber (19), a gas pressurization system, a bias pressure pump (32), a confining pressure pump (34), an exhaust system and a pressure testing device, wherein:
a platform (10) is arranged at the bottom in the pressure chamber (19), a rock sample (13) is placed on the platform (10), an axial dowel bar (18) is arranged at the top in the pressure chamber (19), the lower end of the axial dowel bar (18) is connected with a pressure head (17), and the lower end of the pressure head (17) is in contact with the top of the rock sample (13); annular strain gauges (15) are arranged on the rock sample (13) in the circumferential direction, and axial strain gauges (11) are arranged on two sides of the rock sample (13);
the gas pressurization system is connected with an air inlet (12) at the bottom of the rock sample (13) through a pipeline;
the exhaust system is connected with an air outlet (16) at the top of the rock sample (13) through a pipeline;
the bias pressure pump (32) is connected with the top of the pressure chamber (19);
the confining pressure pump (34) is connected with the bottom of the pressure chamber (19).
2. CO in rock chemical corrosion environment according to claim 1 2 Triaxial seepage flow test system, its characterized in that: the gas pressurization system comprises CO sequentially connected through plastic pipes (3) 2 Gas cylinder (1), gas booster pump (4), gas buffer (7), CO 2 A first valve (2) is arranged in a plastic pipe (3) between a gas cylinder (1) and a gas booster pump (4), the gas booster pump (4) is connected with an air compressor (6), a second valve (5) is arranged between the gas booster pump (4) and the air compressor (6), an outlet of a gas buffer (7) is connected with an air inlet hole (12), and a pressure gauge (9) and a pressure reducing valve (8) are arranged in the plastic pipe (3) between the gas buffer (7) and the air inlet hole (12).
3. CO in rock chemical corrosion environment according to claim 1 2 Triaxial seepage flow test system, its characterized in that: the exhaust system comprises a gas-liquid separator (25) connected with the air outlet (16), and the gas-liquid separator (25) is sequentially connected with a third valve (26), a dryer (27), a first gas flowmeter (28), a second gas flowmeter (29) and a third gas flowmeter (30) through pipelines.
4. CO in rock chemical corrosion environment according to claim 1 2 Triaxial seepage flow test system, its characterized in that: a fourth valve (31) and a bias pressure sensor (36) are arranged in a connecting pipeline of the bias pressure pump (32) and the pressure chamber (19).
5. CO in rock chemical corrosion environment according to claim 1 2 Triaxial seepage flow test system, its characterized in that: and a fifth valve (33) and a confining pressure sensor (37) are arranged in a connecting pipeline of the confining pressure pump (34) and the pressure chamber (19).
6. Rock according to claim 1CO in petrochemical corrosive environment 2 Triaxial seepage flow test system, its characterized in that: the lower end of the pressure head (17) is provided with a rubber sleeve (14).
7. CO in rock chemical corrosion environment according to claim 1 2 Triaxial seepage flow test system, its characterized in that: the pressure chamber is characterized in that a pressure chamber outer steel plate (23) is arranged outside the pressure chamber (19), an axial force transmission pressure head (21) is arranged at the upper end of the axial force transmission rod (18), a steel rod (22) is connected to the upper end of the axial force transmission pressure head (21), and the steel rod (22) penetrates out of the pressure chamber outer steel plate (23) at the top of the pressure chamber (19) and is fixed through a nut (24).
8. CO in rock chemical corrosion environment according to claim 7 2 Triaxial seepage flow test system, its characterized in that: and a sealing ring (20) is arranged on the axial force transmission pressure head (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122926796.1U CN217332081U (en) | 2021-11-25 | 2021-11-25 | CO in rock chemical corrosion environment 2 Triaxial seepage test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122926796.1U CN217332081U (en) | 2021-11-25 | 2021-11-25 | CO in rock chemical corrosion environment 2 Triaxial seepage test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217332081U true CN217332081U (en) | 2022-08-30 |
Family
ID=82944626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122926796.1U Active CN217332081U (en) | 2021-11-25 | 2021-11-25 | CO in rock chemical corrosion environment 2 Triaxial seepage test system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217332081U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199739A (en) * | 2021-11-25 | 2022-03-18 | 中铁二十局集团第四工程有限公司 | CO in rock chemical corrosion environment2Triaxial seepage test system and method |
| CN115683794A (en) * | 2023-01-05 | 2023-02-03 | 华北科技学院(中国煤矿安全技术培训中心) | Rock sample long-term etching device, system and method in triaxial environment |
| 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 |
-
2021
- 2021-11-25 CN CN202122926796.1U patent/CN217332081U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199739A (en) * | 2021-11-25 | 2022-03-18 | 中铁二十局集团第四工程有限公司 | CO in rock chemical corrosion environment2Triaxial seepage test system and method |
| CN114199739B (en) * | 2021-11-25 | 2024-03-29 | 中铁二十局集团第四工程有限公司 | CO in rock chemical corrosion environment 2 Triaxial seepage test system and method |
| CN115683794A (en) * | 2023-01-05 | 2023-02-03 | 华北科技学院(中国煤矿安全技术培训中心) | Rock sample long-term etching device, system and method in triaxial environment |
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN217332081U (en) | CO in rock chemical corrosion environment 2 Triaxial seepage test system | |
| CN103940722B (en) | The proving installation of a kind of gas bearing shale factor of porosity and absorption parameter and method | |
| CN103033442B (en) | A kind of gas adsorption test device for desorption | |
| CN101408493B (en) | Method and apparatus for measuring adsorbance-deformation-permeability coefficients of material | |
| CN108709815B (en) | Experimental device and method for measuring fracture toughness of rock at low temperature | |
| CN101865754B (en) | Method for detecting gas tightness of composite material laminated plate | |
| WO2020244256A1 (en) | Device and method for testing radial gas permeability of concrete | |
| CN101358916A (en) | Concrete permeameter under loading action | |
| CN104297069A (en) | Gas-containing coal hydrofracture-induced dynamic damage simulation monitoring device and method | |
| CN103048261B (en) | Device and method for researching rock physical property parameter change under action of acid fluid | |
| CN112049610B (en) | Device and method for testing dynamic change of parameters of various coal beds during seam gas well seam production | |
| CN109164032A (en) | Full-automatic saline-supercritical CO rock2Two-phase permeability testing system and method | |
| CN203929583U (en) | The proving installation of a kind of gas bearing shale factor of porosity and absorption parameter | |
| CN113790853B (en) | Comprehensive test platform for dynamic tightness of gas storage cover layer rock | |
| CN113311138B (en) | Method and system for detecting and tracking fluid leakage in fault based on fiber Bragg grating sensing | |
| CN208076347U (en) | Rock permeability and compression coefficient joint measurement device | |
| CN209945932U (en) | A test instrument for rock gas high pressure adsorption | |
| CN205333483U (en) | Gas permeability test system | |
| CN108645582B (en) | Shallow sea drilling high-yield gas well production pipe column vibration deformation experimental device and method | |
| CN115248177B (en) | Method and device for measuring breakthrough pressure of low-permeability rock based on optical fiber sensing | |
| CN109307628B (en) | Mud film shear strength test instrument and mud film shear strength measurement method thereof | |
| CN114199739B (en) | CO in rock chemical corrosion environment 2 Triaxial seepage test system and method | |
| CN203229939U (en) | Environmental pore pressure static sounding probe capable of evaluating saturated soil permeability characteristic in situ | |
| CN113758850B (en) | Flexible wall permeameter for realizing temperature-stress integrated control under dry-wet circulation | |
| CN205691428U (en) | Hole internal water pressure test device and test system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |