CN117538217A - Device and method for analyzing permeation and migration characteristics of helium-rich natural gas in rock - Google Patents
Device and method for analyzing permeation and migration characteristics of helium-rich natural gas in rock Download PDFInfo
- Publication number
- CN117538217A CN117538217A CN202311592303.2A CN202311592303A CN117538217A CN 117538217 A CN117538217 A CN 117538217A CN 202311592303 A CN202311592303 A CN 202311592303A CN 117538217 A CN117538217 A CN 117538217A
- Authority
- CN
- China
- Prior art keywords
- port
- valve
- cavity
- helium
- pipeline
- 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.)
- Pending
Links
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 94
- 239000001307 helium Substances 0.000 title claims abstract description 71
- 229910052734 helium Inorganic materials 0.000 title claims abstract description 71
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 239000003345 natural gas Substances 0.000 title claims abstract description 47
- 239000011435 rock Substances 0.000 title claims abstract description 44
- 238000013508 migration Methods 0.000 title claims abstract description 41
- 230000005012 migration Effects 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000001514 detection method Methods 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims abstract description 23
- 230000002776 aggregation Effects 0.000 claims abstract description 19
- 238000004220 aggregation Methods 0.000 claims abstract description 19
- 230000035699 permeability Effects 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 239000007789 gas Substances 0.000 claims description 78
- 238000012360 testing method Methods 0.000 claims description 39
- 230000008569 process Effects 0.000 claims description 16
- 238000003860 storage Methods 0.000 claims description 10
- 230000007613 environmental effect Effects 0.000 claims description 4
- 238000002474 experimental method Methods 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000011160 research Methods 0.000 abstract description 3
- 238000006116 polymerization reaction Methods 0.000 abstract 1
- 239000011162 core material Substances 0.000 description 36
- 239000000565 sealant Substances 0.000 description 10
- 238000004458 analytical method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N13/04—Investigating osmotic effects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Immunology (AREA)
- General Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Remote Sensing (AREA)
- Combustion & Propulsion (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention belongs to the technical field of helium enrichment and aggregation research equipment, and particularly relates to a device and a method for analyzing permeation and migration characteristics of helium-enriched natural gas in rock. The device comprises a cavity, wherein the top of the cavity is covered with a cavity cover; the cavity is internally provided with a core sample, an air supply space is arranged in the core sample, an air supply pipe is arranged in the air supply space, a heating device is arranged on the air supply pipe, the top of the core sample is covered with a sealing cover, and the air supply pipe penetrates through the cavity cover and the sealing cover; the outside of the cavity is provided with an on-line detection device and a vacuumizing system. The invention solves the technical problem that the existing pressure-covering porosity permeability measuring instrument can not quantitatively simulate the helium-rich natural gas permeation and transportation polymerization processes under different geological conditions.
Description
Technical Field
The invention belongs to the technical field of helium enrichment and aggregation research equipment, and particularly relates to a device and a method for analyzing permeation and migration characteristics of helium-enriched natural gas in rock.
Background
Helium is an important reserve resource and is an indispensable raw material in the high-tech fields of semiconductors, superconductivity, aerospace and the like. At present, research on migration and aggregation mechanisms of helium under geological conditions is still blank in the world. The helium resource has low exploration rate and unknown resource potential, the theoretical mechanism of helium migration and aggregation is urgently needed to be researched, a helium reservoir theory and evaluation system is established, and the exploration and development of the helium-rich gas reservoir are guided.
Unlike conventional natural gas, helium gas reservoir theory needs to be studied in detail about the influence of environmental factors under various geological conditions on helium gas permeation and aggregation processes, such as temperature, pressure, rock porosity, permeability and influence of different associated gas components on helium gas permeation and aggregation processes.
The main function of the pressure-covering porosity and permeability measuring instrument in the prior art is to analyze the porosity and permeability of the rock, and the permeability and migration characteristics of different gases in the rock under geological conditions can not be quantitatively detected. At present, no experimental equipment can quantitatively simulate the migration and aggregation process of helium-enriched natural gas under geological conditions.
Disclosure of Invention
The prior art equipment cannot quantitatively simulate the permeation and aggregation processes of helium-rich natural gas under geological conditions of different temperatures, pressures, rock porosities, permeabilities and different associated gas components. In order to solve the technical problems, the invention provides a device and a method for quantitatively analyzing the permeation and migration characteristics of helium-rich natural gas in rock.
The invention aims to provide a device for analyzing the permeation and migration characteristics of helium-rich natural gas in rock, which comprises a cavity, wherein a cavity is formed in the cavity, a cavity cover is covered on the top of the cavity, and a port D5 is formed in the side wall of the cavity;
the cavity of the cavity is internally provided with a core sample, the core sample is internally provided with an air supply space, the air supply space is internally provided with an air supply pipe, the air supply pipe comprises a port D2 and a port D7, the outer wall of the port D7 is provided with a heating device, the bottom of the core sample is arranged on the inner bottom surface of the cavity, the top of the core sample is covered with a sealing cover, after the sealing cover is covered, the air supply space is in a sealed state, the cavity cover and the sealing cover are provided with opposite perforations, the air supply pipe penetrates through the opposite perforations, the port D7 is positioned in the air supply space, and the port D2 is positioned outside the cavity cover;
the port D2 is used for air intake, an online detection device and a vacuumizing system are arranged outside the cavity, the online detection device and the vacuumizing system can be connected with the port D5 and the port D2, and valves are arranged on pipelines connected with the online detection device and the vacuumizing system.
Preferably, in the device for analyzing the permeation and migration characteristics of helium-rich natural gas in rock, the core sample is cylindrical, the longitudinal section of the core sample is U-shaped, and the gas supply space is cylindrical.
Preferably, in the device for analyzing the permeation and migration characteristics of helium-rich natural gas in rock, after the cavity cover is connected with the top of the rock core sample, the connecting joint is sealed by sealant.
Preferably, the above device for analyzing the permeation and migration characteristics of helium-rich natural gas in rock, where the valve includes a valve V1, a gas storage device is disposed outside the cavity, one end of a first pipe is connected to the gas storage device, the other end of the first pipe is a port D1, the port D1 is detachably connected to the port D2, the first pipe is communicable with the gas supply pipe, and the first pipe is further provided with the valve V1;
the position of the first pipeline between the valve V1 and the port D1 is connected with a second pipeline, one end of the second pipeline, which is far away from the first pipeline, is provided with a port D3, and the port D3 can be connected with the on-line detection device and the vacuumizing system.
Preferably, the above device for analyzing the permeation and migration characteristics of helium-rich natural gas in rock, the valve further comprises a valve V2, a valve V3 and a valve V4, the on-line detection device comprises an air inlet, the air inlet is connected with a four-way, the four-way is respectively connected with one end of an air inlet, one end of a third pipeline, one end of a fourth pipeline and one end of a fifth pipeline, the other end of the third pipeline is a port D4, the port D4 is detachably connected with the port D3, the third pipeline is provided with the valve V2, the other end of the fourth pipeline is a port D6, the port D5 is detachably connected with the port D6, the fourth pipeline is provided with the valve V3, the other end of the fifth pipeline is connected with the vacuumizing system, and the fifth pipeline is provided with the valve V4.
Preferably, in the device for analyzing the permeation and migration characteristics of helium-rich natural gas in rock, a first temperature testing device and a first pressure testing device are arranged on the first pipeline, and a second temperature testing device and a second pressure testing device are arranged on the cavity cover.
The first temperature testing device is a first thermometer or a first temperature sensor, the second temperature testing device is a second thermometer or a second temperature sensor, the first pressure testing device is a first pressure gauge or a first pressure sensor, and the second pressure testing device is a second pressure gauge or a second pressure sensor.
Preferably, in the device for analyzing the permeation and migration characteristics of helium-rich natural gas in rock, connectors are adopted to connect between a port D1 and a port D2, between a port D3 and a port D4 and between a port D5 and a port D6, the connectors comprise a shell, a first connecting part and a second connecting part, wherein the first connecting part and the second connecting part have the same structure, and are symmetrically arranged in the shell, and the shell comprises two connectors which are respectively correspondingly connected with the first connecting part and the second connecting part;
taking the port D1 and the first connecting component as examples, the structure of the first connecting component and the connection mode of the first connecting component and each port are described, the first connecting component comprises a fixed cavity and an annular telescopic pad, the fixed cavity is arranged on the inner wall of the shell, the annular telescopic pad is arranged around the inner wall of the fixed cavity, the port D1 stretches into the fixed cavity and is in contact with the telescopic pad, and the telescopic pad is compressed.
Preferably, the width of the port D1 is smaller than the width of the telescopic pad, and the diameter of the inner ring of the telescopic pad is smaller than the diameter of the port D1. The connection between the remaining ports D2-D6 and the first connection member refers to the connection between the port D1 and the first connection member.
Preferably, the telescopic pad comprises a telescopic part and a non-telescopic part, wherein the non-telescopic part is fixedly connected with the inner wall of the fixed cavity, one end of the telescopic part is fixedly connected with the non-telescopic part, the other end of the telescopic part is a free movable end, and the free movable end is used for being abutted with the end face of the port D1. Preferably, when the port D1 is not in the natural unfolded state with the telescopic portion, the telescopic portion is flush with the end surface of the fixed cavity connection port, so as to increase the width of the connection port at this time, and protect the fixed cavity connection port.
The invention also provides a method for analyzing the permeation and migration characteristics of helium-rich natural gas in rock, which comprises the following steps:
preparing a device for analyzing the permeation and migration characteristics of helium-rich natural gas in rock, and processing a core material into a structure of a core sample;
connecting the sealing cover with the air supply pipe, and sealing the connecting part by using sealant;
the sealing cover connected with the air supply pipe is added to the top of the core sample, and the joint is sealed by sealant;
connecting a cavity cover to the cavity, and sealing the joint of the cavity cover and the air supply pipe by using sealant;
connecting port D1 with port D2, connecting port D3 with port D4, and connecting port D5 with port D6;
the gas storage device stores mixed gas;
opening the vacuumizing system, closing the valve V1, and opening the valve V2, the valve V3 and the valve V4;
when the numbers of the first pressure testing device and the second pressure testing device are lower than 10 -6 Closing the valve V2 and the valve V3 when Pa;
opening a valve V1, feeding mixed gas into the gas feeding space through a first pipeline and a gas feeding pipe, and simultaneously opening a valve V2, and detecting the component content of the gas fed into the gas feeding space by using an online detection device;
after the component content test is finished, closing the valve V2; pressurizing and feeding mixed gas, and closing the valve V1 when the indication of the first pressure testing device reaches a specified pressure value; the first pressure testing device displays the pressure of the mixed gas fed into the air feeding space 21, and the pressure is set to be different pressure values according to experimental requirements;
starting a heating device, keeping the indication of the first temperature testing device at a specified temperature value, and setting the indication of the first temperature testing device at different temperature values according to experimental requirements;
opening a valve V3, and monitoring the component content of permeated gas in real time by an online detection device, and recording the values of a first temperature testing device, a second temperature testing device, a first pressure testing device and a second pressure testing device in real time;
when the readings of the first pressure testing device and the second pressure testing device are equal, and the content of the permeated gas component is monitored in real time by the on-line detection device and is not changed, the experiment is ended;
according to experimental time and experimental data of the permeation quantity of each gas component, the rock porosity/permeability, the temperature and the pressure in the same time, the permeation characteristics of helium in helium-rich natural gas under different environmental conditions are obtained, so that the migration and aggregation processes of helium under actual geological conditions are studied.
Preferably, the composition of the components and the content of each component of the mixed gas can be configured according to experimental requirements, and different types of natural gas can be simulated. The mixed gas comprises CH 4 And He, volume ratio 200-100:1; n (N) 2 And He, volume ratio 200-100:1; or is CH 4 、N 2 And He, the volume ratio is 100-50:100-50:1. For example, the mixed gas is CH 4 And He, volume ratio 200:1; or is N 2 And He, volume ratio 100:1; or is CH 4 、N 2 And He, volume ratio 70:30:1.
Compared with the prior art, the invention has the following beneficial effects:
the helium migration and aggregation process under geological conditions is extremely complex, and the device provided by the invention can simulate the characteristic of permeation migration of helium in different types of rocks under different temperature and pressure conditions, and can quantitatively study the influence of other gas components on the permeation capacity of helium in various rocks. Has important significance for researching the migration and aggregation processes of helium-rich natural gas and establishing a helium reservoir theoretical model.
In addition, the invention fills the blank of quantitatively researching helium-rich natural gas permeation and transportation and aggregation devices. The cylindrical rock core designed by the invention is not a traditional columnar rock core, improves the traditional rock single-section permeation analysis, and enables the permeation process to be more in line with the actual geological condition. The invention establishes a high vacuum infiltration system and realizes high-precision quantitative analysis of helium-rich natural gas transportation and aggregation characteristics by utilizing an online gas component analysis device. Provides powerful technical support for quantitatively researching permeation and aggregation behaviors of helium-enriched natural gas with high precision and establishing a helium gas reservoir theory in China.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for analyzing helium-rich natural gas permeation and migration characteristics in rock according to example 1 of the present invention.
Fig. 2 is a schematic view showing a part of the structure of the apparatus for analyzing helium-rich natural gas permeation and migration characteristics in rock according to example 1 of the present invention.
Fig. 3 is a connection structure diagram of the port D1 and the port D2 in embodiment 1 of the present invention.
Fig. 4 is a connection structure diagram of the port D1 and the connector according to embodiment 3 of the present invention, and is disassembled.
Fig. 5 is a connection structure diagram of the port D1 and the connector according to embodiment 3 of the present invention, and the connection state is shown.
Fig. 6 is a longitudinal sectional view showing the connection structure of the port D1 and the port D2 according to embodiment 3 of the present invention, and the connection state is shown.
Fig. 7 is a longitudinal sectional view of the connection structure of the port D1 and the port D2 in embodiment 3 of the present invention, and the port D1 is in a disassembled state.
Detailed Description
In order that those skilled in the art will better understand the technical scheme of the present invention, the present invention will be further described with reference to specific embodiments and drawings.
In the description of the present invention, unless otherwise specified, all reagents are commercially available and methods are conventional in the art.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second" may include one or more such features, either explicitly or implicitly; in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present invention, unless explicitly stated and limited otherwise, a first feature "up" or "down" on a second feature may be that the first feature and the second feature are in direct contact, or that the first feature and the second feature are in indirect contact via an intermediary. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
Currently, most of cores adopted in the prior art for researching geological conditions are traditional columnar cores, wherein the traditional columnar cores comprise standard columnar cores with the diameters of 25mm or 38mm and the lengths of less than 300mm; or a cuboid core, the length of which ranges from 1 mm to 1200mm. The adoption of the traditional columnar core only considers the problems of convenient core manufacture and convenient installation. When the helium enrichment process is studied, the cross sections of the traditional columnar cores are single sections, so that only single-section permeation analysis can be performed, however, we find that the helium permeation process under the actual geological condition is multi-faceted and complex, the single-section permeation analysis is single in section, and the permeation process does not completely accord with the actual geological condition. The present invention resets the core structure.
In addition, the existing overburden porosity and permeability measuring instrument measures the porosity and permeability of the core, and cannot quantitatively simulate the permeation and transportation process of helium-enriched natural gas under different geological conditions, such as different geological temperatures, pressures, rock porosity, permeability and different associated gas components. However, for the study of helium aggregation theory and helium aggregation model, quantitative detection and clarification of the permeation and transportation and aggregation processes of helium-enriched natural gas are necessary and important.
For the above reasons, the present invention provides an apparatus for analyzing helium-rich natural gas permeation and migration characteristics in rock, including the following examples.
Example 1
An apparatus for analyzing the permeation and migration characteristics of helium-rich natural gas in rock, see fig. 1 and 2, comprises a cavity 1, wherein a cavity is formed in the cavity 1, a cavity cover 11 is covered on the top of the cavity 1, and the cavity 1 is detachably connected with the cavity cover 11, such as a screw connection or a flange connection. The side wall of the cavity 1 is provided with a port D5 for communicating the inside and the outside of the cavity 1. The cavity of the cavity 1 is internally provided with a core sample 2, the core sample 2 has certain porosity and permeability, an air supply space 21 is arranged in the core sample 2, the core sample 2 is in a cylinder shape, the longitudinal section of the core sample 2 is in a U shape, and the air supply space 21 is a cylindrical space.
The air supply space 21 is internally provided with an air supply pipe 3, the air supply pipe 3 comprises a port D2 and a port D7, and a heating device 31 is arranged on the outer wall of the port D7, for example, the heating device 31 is a heating plate, a heater or a heating sleeve. The bottom of the core sample 2 is arranged on the inner bottom surface of the cavity body 1, the top of the core sample 2 is covered with the sealing cover 12, and after the sealing cover 12 is covered, the air supply space 21 is in a sealed state. In order to improve the tightness, after the cavity cover 11 is connected with the top of the core sample 2, the connecting joint is sealed by sealant 13. The cavity cover 11 and the sealing cover 12 are provided with opposite perforations, the air supply pipe 3 penetrates through the opposite perforations, the port D7 is positioned in the air supply space 21, the port D2 is positioned outside the cavity cover 11, and in order to further improve the sealing performance, the joint between the air supply pipe 3 and the cavity cover 11 and the cavity 1 is also sealed by the sealant 13.
Gas is fed into the gas feeding space 21 through the gas feeding pipe 3, then permeates and moves into the space between the core sample 2 and the cavity 1, when the pressure, the temperature and the components of the gas in the gas feeding space 21 change, the permeation and the movement of the gas between the core sample 2 and the cavity 1 also change, the permeation and the movement of the accompanying gas components under different geological conditions such as different temperatures, different pressures and different accompanying gas components can be quantitatively simulated, and the permeation and the movement process of helium-enriched natural gas can be quantitatively detected by utilizing the online detection device 5 to test the change of the gas group, so that the gas permeation law under different geological conditions can be quantitatively detected.
With continued reference to fig. 1, the air storage device 4 is disposed outside the cavity 1, the air storage device 4 is connected with a first pipeline 41, one end of the first pipeline 41 is communicated with the air storage device 4, the other end of the first pipeline 41 is a port D1, the port D1 is detachably connected with the port D2, and the first pipeline 41 can be communicated with the air supply pipe 3. The first pipe 41 is further provided with a valve V1, and the valve V1 is used for controlling whether the gas flows or not. A second pipe 42 is connected to the first pipe 41 at a position between the valve V1 and the port D1, and a port D3 is provided at an end of the second pipe 42 away from the first pipe 41.
The cavity 1 is externally provided with an on-line detection device 5 and a vacuumizing system 6, wherein the on-line detection device 5 is used for detecting gas components, and the on-line detection device 5 is a gas detector, a gas component detector and other devices in the prior art. The on-line detecting device 5 comprises an air inlet, a four-way joint is connected to the air inlet, the four-way joint comprises a first end, a second end, a third end and a fourth end, the first end is connected and communicated with the air inlet of the on-line detecting device 5, the joint is sealed through sealant 13, one end of a third pipeline 51 is connected to the second end, one end of a fourth pipeline is connected to the third end, and one end of a fifth pipeline 52 is connected to the fourth end. The other end of the third pipeline 51 is a port D4, the port D4 is detachably connected with a port D3, a valve V2 is arranged on the third pipeline 51, the other end of the fourth pipeline is a port D6, the port D5 is detachably connected with the port D6, a valve V3 is arranged on the fourth pipeline, the other end of the fifth pipeline 52 is connected with a vacuumizing system 6, the vacuumizing system 6 is equipment with vacuumizing functions such as a vacuum pump, and the valve V4 is arranged on the fifth pipeline 52.
It should be noted that, the whole device of the present invention needs to keep low leakage rate for helium, the main body needs to use electropolished 304 stainless steel, valves V1-V4 are all-metal ultrahigh vacuum valves of VAT company, and corresponding ports D1-D6 are connected by high vacuum flange, see fig. 3. The in-line detection device 5 uses a conventional quadrupole mass spectrometer. The first pipe 41 is provided with a first thermometer 411 and a first pressure gauge 412, and the chamber cover 11 is provided with a second thermometer 111 and a second pressure gauge 112.
The method for analyzing the permeation and migration characteristics of the rock helium-rich natural gas by using the device of the embodiment comprises the following steps:
1. the core material is processed into a structure of the core sample 2, the core sample 2 is cylindrical, and the longitudinal section thereof is U-shaped, and the air supply space 21 is a cylindrical space.
2. The sealing cover 12 is connected with the air supply pipe 3, and the joint is sealed by sealant 13.
3. A sealing cover 12 connected with the air supply pipe 3 is added to the top end of the core sample 2, and the joint is sealed by sealant 13, and the gray area is marked by sealant 13 in fig. 2.
4. The chamber cover 11 is flanged to the chamber 1 and the connection to the air feed pipe 3 is sealed with a sealing glue 13, as indicated by the grey area in fig. 2 with the sealing glue 13.
5. Connecting port D1 with port D2, connecting port D3 with port D4, and connecting port D5 with port D6.
6. The gas storage device 4 stores mixed gas, the composition of the mixed gas and the content of each component can be configured according to experimental requirements, and different types of natural gas can be simulated. For example, the mixed gas may be CH 4 And He, volume ratio 200:1; or is N 2 And He, volume ratio 100:1; or is CH 4 、N 2 And He, volume ratio 70:30:1, etc.
The vacuumizing system 6 is opened, the valve V1 is closed, and the valves V2, V3 and V4 are opened.
7. When the indication numbers of the first pressure gauge 412 and the second pressure gauge 112 are both lower than 10 -6 And closing the valve V2 and the valve V3 when Pa.
8. The valve V1 is opened, the mixed gas is supplied into the gas supply space 21 through the first pipe 41 and the gas supply pipe 3, and the valve V2 is opened, whereby the component content of the gas supplied into the gas supply space 21 is detected by the on-line detecting device 5.
9. After the component content test is completed, the valve V2 is closed. The mixed gas is pressurized and fed, and when the first pressure gauge 412 indicates that the specified pressure value is reached, the valve V1 is closed. In this step, the pressure of the mixed gas fed into the plenum 21 is displayed by the first pressure gauge 412, and can be set to different pressure values according to experimental requirements.
10. The heating device 31 is turned on to maintain the indication of the first thermometer 411 at a specified temperature value. In this step, the temperature of the mixed gas fed into the plenum space 21 is displayed by the first thermometer 411, and can be set to different temperature values according to experimental requirements.
11. The valve V3 is opened, and the component content of the permeated gas is monitored in real time by the on-line detection device 5. And the values of the first thermometer 411, the second thermometer 111, the first pressure gauge 412, and the second pressure gauge 112 are recorded in real time.
12. When the first pressure gauge 412 and the second pressure gauge 112 are equal in indication, and the on-line detection device 5 monitors that the content of the permeated gas component is not changed in real time, the experiment is ended.
13. According to experimental data such as experimental time, the permeation quantity of each gas component, the rock porosity/permeability, the temperature, the pressure and the like in the same time, the permeation characteristics of helium in helium-rich natural gas under different environmental conditions can be obtained, so that the migration and aggregation processes of helium under actual geological conditions are studied.
Example 2
The device for analyzing the permeation and migration characteristics of helium-rich natural gas in rock is basically the same as the structure and the working principle of the embodiment 1, except that the first pressure gauge 412 is changed to a first pressure sensor, the second pressure gauge 112 is changed to a second pressure sensor, the first temperature gauge 411 is changed to a first temperature sensor, the second temperature gauge 111 is changed to a second temperature sensor, and a controller such as a PLC controller is arranged on the on-line detection device 5. The controller is electrically connected with the first pressure sensor, the second pressure sensor, the first temperature sensor, the second temperature sensor, the display and the power supply, and the values of the first pressure sensor, the second pressure sensor, the first temperature sensor and the second temperature sensor are displayed by the display. The numerical value is conveniently observed through a display.
Example 3
The device for analyzing the permeation and migration characteristics of helium-rich natural gas in rock is basically the same as the structure and the working principle of the embodiment 1, and the difference is that connectors are adopted to connect the port D1 with the port D2, the port D3 with the port D4 and the port D5 with the port D6.
Referring to fig. 4-7, the connector includes a housing 8, a first connecting member and a second connecting member, wherein the first connecting member and the second connecting member have the same structure and are symmetrically disposed inside the housing 8. The housing 8 includes two connection ports, which are respectively and correspondingly connected to the first connection member and the second connection member. The structure and operation principle will be described below with reference to the first connection part structure and the port D1.
Referring to fig. 6 and 7, the first connection part includes a fixing cavity 81 and an annular telescopic pad 82, the fixing cavity 81 is fixedly arranged on the inner wall of the cavity of the housing 8, the fixing cavity 81 includes a left opening and a right opening, the telescopic pad 82 includes a front surface, a rear surface, an outer ring side surface and an inner ring side surface, the front surface is close to the connection port of the housing 8, the rear surface is away from the connection port of the housing 8, the inner ring side surface is located inside the telescopic pad 82, and the outer ring side surface is located outside the telescopic pad 82. The rear surface or the outer ring side surface near the rear surface of the telescopic pad 82 is fixed to the inner wall of the fixing chamber 81. The front surface of the telescopic pad 82 is a movable surface, the port D1 extends into the fixed cavity 81 and contacts with the telescopic pad 82, the telescopic pad 82 is compressed to form a tight connection relationship, and the structure has good tightness even if the structure is not in contact with vacuumizing operation.
Illustratively, the telescoping pad 82 is an elastomeric gasket, such as an elastomeric rubber.
Illustratively, the width of ports D1-D6 are each smaller than the width of telescoping pad 82, and the inner ring diameter of telescoping pad 82 is smaller than the diameter of ports D1-D6. If the width of the port D1 is smaller than the width of the telescopic pad 82, and the diameter of the inner ring of the telescopic pad 82 is smaller than the diameter of the port D1, after the end face of the port D1 abuts against the front surface of the telescopic pad 82, the inner ring side of the telescopic pad 82 protrudes out of the port D1, and since the telescopic pad 82 is made of elastic material, when gas flows through the protruding portion of the telescopic pad 82, the telescopic pad 82 deforms, and has a deceleration effect on the gas, so that the gas entering the on-line detection device 5 is gentle, and excessive impact and gas leakage are avoided.
Illustratively, the telescopic pad 82 includes a telescopic portion 821 and a non-telescopic portion 822, the non-telescopic portion 822 is fixedly connected with the inner wall of the fixed cavity 81, one end of the telescopic portion 821 is fixedly connected with the non-telescopic portion 822, the other end of the telescopic portion 821 is a free end, and the free end is used for abutting against the end face of the port D1. Preferably, when the port D1 is not in the state of being naturally unfolded with the telescopic portion 821, the telescopic portion 821 is flush with the end face of the connection port of the fixed chamber 81, so as to increase the width of the connection port at this time, thereby protecting the connection port of the fixed chamber 81.
Illustratively, the connector further includes an expansion portion 83, the expansion portion 83 is fixed around the outer wall of the port D1, and the expansion portion 83 is matched with the shape of the fixing cavity 81, so that the expansion portion 83 can extend into the fixing cavity 81 along with the port D1, the expansion portion 83 has a protection function on the port D1, and the service life of the port D1 is prolonged.
The fixing chamber 81 of the first connecting member is in communication with the opening of the fixing chamber 81 of the second connecting member.
It should be noted that, in fig. 4 to fig. 7, the connection is exemplified by the connection between the port D1 and the port D2, and the connection manner of the remaining ports may also be referred to as the connection manner of fig. 4 to fig. 7.
It should be noted that, the connection relationships of the components not specifically mentioned in the present invention are all default to the prior art, and the connection relationships of the structures are not described in detail because they do not relate to the invention points and are common applications of the prior art.
It should be noted that, when numerical ranges are referred to in the present invention, it should be understood that two endpoints of each numerical range and any numerical value between the two endpoints are optional, and because the adopted step method is the same as the embodiment, in order to prevent redundancy, the present invention describes a preferred embodiment. While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. The device for analyzing the permeation and migration characteristics of helium-rich natural gas in rock is characterized by comprising a cavity (1), wherein a cavity cover (11) is covered on the top of the cavity (1), and a port D5 is arranged on the side wall of the cavity (1);
the cavity (1) is internally provided with a core sample (2), an air supply space (21) is arranged in the core sample (2), an air supply pipe (3) is arranged in the air supply space (21), the air supply pipe (3) comprises a port D2 and a port D7, a heating device (31) is arranged on the outer wall of the port D7, the top of the core sample (2) is covered with a sealing cover (12), after the sealing cover (12) is covered, the air supply space (21) is in a sealed state, the air supply pipe (3) penetrates through the cavity cover (11) and the sealing cover (12), the port D7 is positioned in the air supply space (21), and the port D2 is positioned outside the cavity cover (11);
the port D2 is used for air intake, an online detection device (5) and a vacuumizing system (6) are arranged outside the cavity (1), the online detection device (5) and the vacuumizing system (6) can be connected with the port D5 and the port D2, and valves are arranged on pipelines connected with the online detection device (5) and the vacuumizing system (6).
2. The device for analyzing the permeation and migration characteristics of helium-rich natural gas in rock according to claim 1, wherein the core sample (2) is cylindrical.
3. Device for analysing the permeation and migration characteristics of helium-rich natural gas in rock according to claim 2, characterized in that after the cavity cover (11) has been connected to the top of the core sample (2), the joint is sealed with a sealing glue (13).
4. The device for analyzing the permeation and migration characteristics of helium-rich natural gas in rock according to claim 1, wherein the valve comprises a valve V1, a gas storage device (4) is arranged outside the cavity (1), one end of a first pipeline (41) is connected to the gas storage device (4), the other end of the first pipeline (41) is a port D1, the port D1 is detachably connected with the port D2, and the valve V1 is arranged on the first pipeline (41);
the position of the first pipeline (41) between the valve V1 and the port D1 is connected with a second pipeline (42), one end, far away from the first pipeline (41), of the second pipeline (42) is provided with a port D3, and the port D3 can be connected with the online detection device (5) and the vacuumizing system (6).
5. The device for analyzing the permeation and migration characteristics of helium-rich natural gas in rock according to claim 4, wherein the valve further comprises a valve V2, a valve V3 and a valve V4, the on-line detection device (5) comprises an air inlet, a four-way is connected to the air inlet, one end of a third pipeline (51), one end of a fourth pipeline and one end of a fifth pipeline (52) respectively, the other end of the third pipeline (51) is a port D4, the port D4 is detachably connected with the port D3, a valve V2 is arranged on the third pipeline (51), the other end of the fourth pipeline is a port D6, the port D5 is detachably connected with the port D6, the valve V3 is arranged on the fourth pipeline, the other end of the fifth pipeline (52) is connected with the vacuumizing system (6), and the valve V4 is arranged on the fifth pipeline (52).
6. The device for analyzing the permeation and migration characteristics of helium-rich natural gas in rock according to claim 5, wherein a first temperature testing device and a first pressure testing device are arranged on the first pipeline (41), and a second temperature testing device and a second pressure testing device are arranged on the cavity cover (11).
7. The device for analyzing the permeation and migration characteristics of helium-rich natural gas in rock according to claim 6, wherein connectors are adopted for connection between a port D1 and a port D2, between a port D3 and a port D4 and between a port D5 and a port D6, the connectors comprise a shell (8), a first connecting part and a second connecting part, the first connecting part and the second connecting part are identical in structure and are symmetrically arranged inside the shell (8), and the shell (8) comprises two connectors which are respectively correspondingly connected with the first connecting part and the second connecting part;
the first connecting part comprises a fixing cavity (81) and an annular telescopic pad (82), wherein the fixing cavity (81) is arranged on the inner wall of the shell (8), and the annular telescopic pad (82) is arranged around the inner wall of the fixing cavity (81).
8. The apparatus for analyzing helium-rich natural gas permeation and migration characteristics in rock according to claim 7, wherein the width of each of the ports D1 to D6 is smaller than the width of the telescopic pad (82), and the diameter of the inner ring of the telescopic pad (82) is smaller than the diameter of the ports D1 to D6.
9. A method of analyzing helium-rich natural gas permeation and migration characteristics in rock, comprising:
preparing the device of any one of claims 5-8 and preparing the structure of the core sample (2);
connecting the sealing cover (12) with the air supply pipe (3), adding the sealing cover (12) to the top of the core sample (2), and connecting the cavity cover (11) to the cavity (1);
connecting the port D1 with the port D2, connecting the port D3 with the port D4, and connecting the port D5 with the port D6;
the gas storage device (4) stores mixed gas;
opening the vacuumizing system (6), closing the valve V1, and opening the valve V2, the valve V3 and the valve V4;
when the numbers of the first pressure testing device and the second pressure testing device are lower than 10 -6 Closing the valve V2 and the valve V3 when Pa;
opening a valve V1, feeding mixed gas into the gas feeding space (21), and simultaneously opening a valve V2, and detecting the component content of the gas fed into the gas feeding space (21) by using an online detection device (5);
after the component content test is finished, closing the valve V2; pressurizing and feeding mixed gas, and closing the valve V1 when the indication of the first pressure testing device reaches a specified pressure value; the first pressure testing device displays the pressure of the mixed gas fed into the gas feeding space 21, and is set to different pressure values according to experimental requirements;
starting a heating device (31) to enable the indication number of the first temperature testing device to be kept at a specified temperature value, and setting the indication number to be different temperature values according to experimental requirements;
opening a valve V3, and monitoring the component content of permeated gas in real time by an online detection device (5) and recording the values of a first temperature test device, a second temperature test device, a first pressure test device and a second pressure test device in real time;
when the readings of the first pressure testing device and the second pressure testing device are equal, and the content of the permeated gas component is monitored in real time by the on-line detection device (5) and is not changed, the experiment is ended;
according to experimental time, the permeation quantity of each gas component in the same time, the porosity/permeability, temperature and pressure experimental data of the core sample (2), the permeation characteristics of helium in helium-enriched natural gas under different environmental conditions are obtained, and therefore the migration and aggregation processes of helium under actual geological conditions are studied.
10. The method of analyzing helium-rich natural gas permeation and migration characteristics in rock of claim 9,
characterized in that the mixed gas component is CH 4 And He, volume ratio 200-100:1; or is N 2 And He,
the volume ratio is 200-100:1; or is CH 4 、N 2 And He, the volume ratio is 100-50:100-50:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311592303.2A CN117538217A (en) | 2023-11-27 | 2023-11-27 | Device and method for analyzing permeation and migration characteristics of helium-rich natural gas in rock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311592303.2A CN117538217A (en) | 2023-11-27 | 2023-11-27 | Device and method for analyzing permeation and migration characteristics of helium-rich natural gas in rock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117538217A true CN117538217A (en) | 2024-02-09 |
Family
ID=89783953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311592303.2A Pending CN117538217A (en) | 2023-11-27 | 2023-11-27 | Device and method for analyzing permeation and migration characteristics of helium-rich natural gas in rock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117538217A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117538216A (en) * | 2023-11-27 | 2024-02-09 | 中国科学院西北生态环境资源研究院 | Detection device and detection method for rare gas sample in formation water |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101221111A (en) * | 2007-01-12 | 2008-07-16 | 中国石油大学(北京) | Testing method and device for anisotropic permeability |
| CN102998229A (en) * | 2012-11-16 | 2013-03-27 | 中国石油天然气股份有限公司 | Method for simulation experiment of gas diffusion migration in unconventional hypotonic compact sandstone |
| CN103196762A (en) * | 2013-04-25 | 2013-07-10 | 重庆地质矿产研究院 | Experimental device and method for reforming shale gas reservoir through pulse hydraulic fracturing |
| CN105526441A (en) * | 2016-02-29 | 2016-04-27 | 苏州市永通不锈钢有限公司 | Connecting piece for stainless steel pipes |
| CN106841000A (en) * | 2017-01-12 | 2017-06-13 | 四川大学 | The sample component and its test method of special hypotonic rock radial penetration rate testing experiment |
| CN109187239A (en) * | 2018-10-16 | 2019-01-11 | 中国矿业大学(北京) | A kind of experimental provision and method for studying detonation gas pressure rock breaking mechanism |
| CN209340678U (en) * | 2018-12-19 | 2019-09-03 | 江苏信驰能源科技有限公司 | A kind of natural gas line interface sealing structure |
| CN110361265A (en) * | 2019-08-07 | 2019-10-22 | 中煤科工集团重庆研究院有限公司 | After mining reactive polymer material slip casting with the characteristic method for continuously measuring and device of coal petrography mixture |
| CN210318911U (en) * | 2019-07-29 | 2020-04-14 | 山东万创管道工程有限公司 | Connecting structure of buried pressure pipeline |
| CN111157430A (en) * | 2020-03-12 | 2020-05-15 | 河海大学 | Method for simulating rock permeability determination under tensile or compressive stress state |
| CN112611698A (en) * | 2020-12-18 | 2021-04-06 | 核工业北京地质研究院 | Rock sample gas permeability testing device and testing method |
| CN112834405A (en) * | 2021-01-07 | 2021-05-25 | 中国科学院西北生态环境资源研究院 | Method and device for testing permeability of rock core overburden pressure matrix |
| CN115979899A (en) * | 2022-11-23 | 2023-04-18 | 北京大学 | Device and method for testing effective diffusion coefficient of helium in helium-containing natural gas |
-
2023
- 2023-11-27 CN CN202311592303.2A patent/CN117538217A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101221111A (en) * | 2007-01-12 | 2008-07-16 | 中国石油大学(北京) | Testing method and device for anisotropic permeability |
| CN102998229A (en) * | 2012-11-16 | 2013-03-27 | 中国石油天然气股份有限公司 | Method for simulation experiment of gas diffusion migration in unconventional hypotonic compact sandstone |
| CN103196762A (en) * | 2013-04-25 | 2013-07-10 | 重庆地质矿产研究院 | Experimental device and method for reforming shale gas reservoir through pulse hydraulic fracturing |
| CN105526441A (en) * | 2016-02-29 | 2016-04-27 | 苏州市永通不锈钢有限公司 | Connecting piece for stainless steel pipes |
| CN106841000A (en) * | 2017-01-12 | 2017-06-13 | 四川大学 | The sample component and its test method of special hypotonic rock radial penetration rate testing experiment |
| CN109187239A (en) * | 2018-10-16 | 2019-01-11 | 中国矿业大学(北京) | A kind of experimental provision and method for studying detonation gas pressure rock breaking mechanism |
| CN209340678U (en) * | 2018-12-19 | 2019-09-03 | 江苏信驰能源科技有限公司 | A kind of natural gas line interface sealing structure |
| CN210318911U (en) * | 2019-07-29 | 2020-04-14 | 山东万创管道工程有限公司 | Connecting structure of buried pressure pipeline |
| CN110361265A (en) * | 2019-08-07 | 2019-10-22 | 中煤科工集团重庆研究院有限公司 | After mining reactive polymer material slip casting with the characteristic method for continuously measuring and device of coal petrography mixture |
| CN111157430A (en) * | 2020-03-12 | 2020-05-15 | 河海大学 | Method for simulating rock permeability determination under tensile or compressive stress state |
| CN112611698A (en) * | 2020-12-18 | 2021-04-06 | 核工业北京地质研究院 | Rock sample gas permeability testing device and testing method |
| CN112834405A (en) * | 2021-01-07 | 2021-05-25 | 中国科学院西北生态环境资源研究院 | Method and device for testing permeability of rock core overburden pressure matrix |
| CN115979899A (en) * | 2022-11-23 | 2023-04-18 | 北京大学 | Device and method for testing effective diffusion coefficient of helium in helium-containing natural gas |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117538216A (en) * | 2023-11-27 | 2024-02-09 | 中国科学院西北生态环境资源研究院 | Detection device and detection method for rare gas sample in formation water |
| CN117538216B (en) * | 2023-11-27 | 2024-06-18 | 中国科学院西北生态环境资源研究院 | Detection device and detection method for rare gas sample in formation water |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107748110B (en) | Microcomputer-controlled electro-hydraulic servo rock triaxial dynamic shear seepage coupling test method | |
| CN107340101B (en) | Gas micro-leakage detection device and method for sealing device | |
| CN117538217A (en) | Device and method for analyzing permeation and migration characteristics of helium-rich natural gas in rock | |
| US20210025801A1 (en) | Experimental Device for Measuring Diffusion Coefficient of Natural Gas | |
| CN107631973B (en) | Multi-method same-machine testing device for permeability measurement of ultra-low permeability rock sample | |
| CN110749434A (en) | System and method for testing pressure maintaining characteristic of pressure maintaining cabin of coring device | |
| CN105466831B (en) | A kind of measuring gas permebility device | |
| CN110823119A (en) | High-pressure experiment cabin measuring system based on vision-laser composite measurement | |
| US8201438B1 (en) | Detection of gas leakage | |
| CN107543662A (en) | Sealed electrical connector Cryogenic air leak test fixture | |
| CN108956052A (en) | A kind of rubber seal method for testing performance of resistance to carbon dioxide | |
| CN113390586B (en) | Airtight check out test set for manometer | |
| CN109916568A (en) | Electric machine controller sealing propertytest system, device and method | |
| CN210464833U (en) | Novel fuel cell pressure maintaining experiment bench | |
| CN111058832A (en) | Experimental device and method for simulating fracture of two well cementation interfaces | |
| CN217483751U (en) | Valve rod sealing element performance test device | |
| CN115655599A (en) | Hydrogen-doped connection sealing element leakage detection and fatigue integrated experimental device and method | |
| CN211669025U (en) | Rock core gas permeability detection device | |
| CN210774670U (en) | Coring device pressurize cabin pressurize characteristic test system | |
| CN215952873U (en) | Sealing performance detection device | |
| CN204085808U (en) | A kind of air-tightness detection device | |
| CN211453270U (en) | Test block mounting device and measuring device for measuring air permeability of concrete | |
| CN211648128U (en) | Experimental device for simulating fracture of two interfaces of well cementation | |
| CN205091234U (en) | Gas permeability testing arrangement | |
| CN214894095U (en) | Pressure testing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |