CN107153032A - The compressive strength of rock test system and method for a kind of controllable temperature - Google Patents
The compressive strength of rock test system and method for a kind of controllable temperature Download PDFInfo
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- CN107153032A CN107153032A CN201610118270.1A CN201610118270A CN107153032A CN 107153032 A CN107153032 A CN 107153032A CN 201610118270 A CN201610118270 A CN 201610118270A CN 107153032 A CN107153032 A CN 107153032A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
- G01N23/046—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT]
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Abstract
The present invention proposes the compressive strength of rock test system and method for a kind of controllable temperature.The test system includes HTHP storehouse, triaxial stress loading device, one or more x-ray detection devices；Each x-ray detection device includes X-ray emitter and X-ray receptor, and X-ray emitter and X-ray receptor are separately positioned on two relative sides of the HTHP storehouse；Triaxial stress loading device provides triaxial pressure loading for the rock sample in the HTHP storehouse；And the HTHP storehouse is provided with heater.The present invention can be realized in rock failure process carries out dynamic detection to the change of rock interior microstructure, measure the compression strength change of rock sample under condition of different temperatures, and finely, intuitively show rock sample rupture process in the form of X-ray scanning image, it can provide effective detection method and detection means for rock rupture mechanics study.
Description
Technical field
The present invention relates to rock mechanics detection field, and in particular to one kind can be carried out under the high temperature conditions
The apparatus and method of rock rupture pressure detecting.
Background technology
It is well known that being exploited with the continuous excavation of top layer oil gas field, Shallow Oil-Gas resource becomes fewer and fewer,
People start the target of exploration petroleum resources to concentrate one's gaze on deep-seated oil gas field.And deep-seated oil gas field is ground
Study carefully, it is necessary to simulate the high temperature and high pressure environment of deep under ground.By detecting oil-bearing rock in different pressures and temperature
The change of physical characteristic under the conditions of degree, can be studied generation, change and migration of oil reservoirs etc., its
Exploitation of the data to petroleum-gas fiedl has important directive significance.
In addition, existing rock mechanics detection means and method can realize rock in different directions stress
The lower experimental simulation ruptured, its experimental result is generally embodied in the form of stress-strain diagram.But,
How to explain these stress-strain diagrams and it is changed into the description of mechanical properties of rock, it is desirable to have be deep
Thick rock mechanics professional knowledge, and there occurs that what kind of changes inside its in rock failure process actually,
Also need to study deeper into ground.
Therefore, this area, which needs exploitation badly, a kind of can carry out the dress of rock rupture pressure detecting under the high temperature conditions
Put and method.
The content of the invention
The present invention has merged true triaxial experimental technique, high temperature and pressure experiment technology and X-ray detection technology, builds
It is vertical it is a set of can simulate high temperature, condition of high voltage, and to rock interior microstructure in rock failure process
Change carries out the experimental provision and method of dynamic detection, realizes compressive strength of rock test at different temperatures,
Rock rupture mechanics can be preferably analyzed for professional and help is provided.
Rock is pressurized under the high temperature conditions in order to realize until the process ruptured is detected, the present invention devises one
Plant the compressive strength of rock test system and its method of testing of controllable temperature.
According to an aspect of the present invention there is provided a kind of compressive strength of rock test system of controllable temperature, bag
Include HTHP storehouse, triaxial stress loading device, one or more x-ray detection devices；Each X-ray
Detection means includes X-ray emitter and X-ray receptor, X-ray emitter and X-ray receptor point
Two relative sides of the HTHP storehouse are not arranged on；Triaxial stress loading device is the HTHP
Rock sample in storehouse provides triaxial pressure loading；And the HTHP storehouse is provided with heater.
Further, triaxial stress loading device includes：6 mechanical arms, 6 mechanical arms are symmetrically set two-by-two
Put in the X, Y, Z axis of rock sample outer surface；Each mechanical arm includes depression bar and platen, and platen is close to
The firmly outer surface of rock sample, depression bar one end is connected with platen.
Further, strain transducer is provided between platen and the rock sample outer surface.Strain transducer
The triaxial stress loading device is connected to, the strain data for collecting rock specimens.
Further, the heater includes heating wire, and heating wire is circumferentially disposed at the HTHP
On the lateral wall in storehouse.
Further, rock sample is square, is arranged in sealing shroud.
Further, the compressive strength of rock test system of described controllable temperature is positioned in sealed lead room.
Further, the system also include control device, with the triaxial stress loading device, one or
Multiple x-ray detection devices and heater connection, and control said apparatus.
Further, the shell in the HTHP storehouse is manufactured using polytetrafluoroethylene (PTFE).
According to another aspect of the present invention there is provided a kind of compressive strength of rock method of testing of controllable temperature, bag
Include following steps：Open X-ray scanning；To the rock sample temperature-pressure being arranged in HTHP storehouse；
Gather the deformation data and X-ray scanning data of rock sample；Handle the data collected.
Further, methods described also includes being swept according to the deformation data and X-ray of the rock sample collected
Data are retouched, adjustment is applied to the temperature and/pressure of rock sample.By the X-ray scanning data that collect to rock
Stone sample carries out 3-D view and shown, judges whether ruptured inside rock sample by image, and then determines
Rock sample compression strength under given temperature.
The maximum temperature of environment can rise to 120 degrees Celsius during the system detectio of the present invention.During system detectio
The maximum pressure of three axial directions can rise to 70 MPas.
The system of the present invention can carry out pressure under high temperature, high pressure conditions to sample (such as rock sample)
Loading, monitors sample in different directions pressure-loaded up to the change of internal microstructure in rupture process in real time.
By the system and method for the present invention, the change to rock interior microstructure in rock failure process can be realized
Change and carry out dynamic detection, the compression strength change of rock sample under measurement condition of different temperatures, and rock sample was ruptured
Journey is fine in the form of X-ray scanning image, intuitively show, it can grind for rock rupture mechanics
The effective detection method of offer and detection means are provided, helps and simplifies professional people to the power to rock failure process
Learn and explain.
Brief description of the drawings
By the way that disclosure illustrative embodiments are described in more detail with reference to accompanying drawing, the disclosure it is above-mentioned
And other purposes, feature and advantage will be apparent, wherein, in disclosure illustrative embodiments
In, identical reference number typically represents same parts.
Fig. 1 shows the structural representation of the compressive strength of rock test system of the controllable temperature of the present invention.
Fig. 2 shows the structural representation in the HTHP storehouse of the present invention.
Fig. 3 shows the compressive strength of rock method of testing of controllable temperature according to an embodiment of the invention
Flow chart.
Embodiment
The preferred embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although being shown in accompanying drawing
The preferred embodiment of the disclosure, however, it is to be appreciated that may be realized in various forms the disclosure without should be by
Embodiments set forth herein is limited.On the contrary, thesing embodiments are provided so that the disclosure is more saturating
It is thorough and complete, and the scope of the present disclosure can intactly be conveyed to those skilled in the art.
The present invention has merged true triaxial experimental technique, high temperature and pressure experiment technology and X-ray detection technology, builds
It is vertical it is a set of can simulate high temperature, condition of high voltage, and to rock interior microstructure in rock failure process
Change carries out the experimental provision and method of dynamic detection, realizes compressive strength of rock test at different temperatures,
Rock rupture mechanics can be preferably analyzed for professional and help is provided.
According to an embodiment of the invention there is provided a kind of compressive strength of rock test system of controllable temperature,
Including HTHP storehouse, triaxial stress loading device, one or more x-ray detection devices；Each X is penetrated
Line detector includes X-ray emitter and X-ray receptor, X-ray emitter and X-ray receptor
It is separately positioned on two relative sides of the HTHP storehouse；Triaxial stress loading device is that the high temperature is high
The rock sample in storehouse is pressed to provide triaxial pressure loading；And the HTHP storehouse is provided with heater.
The true triaxial experimental technique of the present invention can truly simulate principal stress state, and under any stress path
Test sample mechanical characteristics.It can realize that 3 directions apply different size of principal stress, 3 axially productions respectively
Raw strain, can simulate the stress condition in rock mass.
HTHP storehouse can simulate high temperature and high pressure environment.In the storehouse of HTHP storehouse, sample is heated,
Pressurization.Then the change of its physical characteristic at different conditions of built-in ess-strain probe detection is passed through.Cause
The spy being different under Room-temperature low-pressure environment that this each stage that can measure sample by the device shows
Property.
Present invention utilizes x-ray tomography imaging technique, it can under the conditions of to detection object not damaged, with
The form of two-dimensional ct image or three-dimensional image is clear, accurate, careful, multi-level, intuitively open up
Show structure, composition, material and the defective eigenpairs inside object to be detected.
Specifically, system of the invention can be divided into triaxial stress loading device, X-ray detection by its function and fill
Put and the part of HTHP storehouse three.Triaxial stress loading device is provided to be loaded to the triaxial pressure of sample,
Pressure is realized by the mechanical arm and platen of three axial directions.
Generally, laboratory sample is square, and foil gauge (strain transducer) is posted on its six surfaces, is used for
Measure deformation quantity of the sample in three axial directions.Strain transducer and triaxial stress loading device (or with
Control device) connection, strain data is transmitted to triaxial stress loading device (or control device).
HTHP storehouse is the part that tested rock sample enters trip temperature loading, in order to realize X-ray
Detection, places HTHP storehouse housing requirements high temperature resistant, the high pressure of sample, while small to X-ray attenuation.
The shell of high-pressure chamber is typically manufactured using high temperature resistant, the nonmetallic materials of high pressure (such as polytetrafluoroethylene (PTFE)).Outside
The voltage endurance capability of shell is relevant also with the thickness of sheathing material.When thickness increase, voltage endurance capability increase, but to X
The absorption of ray accordingly increases.At this point it is possible to be solved by increasing X-ray emission intensity.
X-ray detection device receives two parts comprising X-ray emitter and X-ray, is respectively placed in high temperature high
Press the corresponding both sides in storehouse.Multiple x-ray detection devices can also be used, rock-like is obtained from different sides
The X-ray scanning data of product.
The system also includes control device, with the triaxial stress loading device, one or more X-rays
Detection means and heater connection, and control said apparatus.Control device in the present invention can be with
Computer, is connected by interface circuit with said apparatus, control heating, pressurization and detection process, and is connect
Receive and handle the data collected.
Due to being related to X-ray, whole test system can be positioned in sealed lead room, pass through computer remote
Control is realized.
Alternatively, triaxial stress loading device includes：6 mechanical arms, 6 mechanical arms are symmetrically arranged two-by-two
In the X, Y, Z axis of rock sample outer surface；Each mechanical arm includes depression bar and platen, and platen is close to
The outer surface of rock sample, depression bar one end is connected with platen.Specifically, HTHP storehouse is square,
Square test sample is positioned in HTHP storehouse by after high temperature resistant, the gum cover sealed envelope of high pressure.It is high
Respectively there are one group of mechanical arm and strain inductor inside warm high-pressure chamber on six faces, calculated by cable connection to outside
Machine control system.Alternatively, mechanical arm provides power by hydraulic system, and hydraulic system is connected to through pipeline
In HTHP storehouse, by computer control, to application confined pressure and temperature outside rock sample.Triaxial stress adds
Three axial compressive forces can be applied to rock sample (stress that each direction applies can be controlled individually by carrying to put
System), and rock sample deformation data is obtained from strain inductor, return to computer.X-ray emitter and
Receiver splits two sides relative with sample, is continuously detected in experimentation, and by the number collected
According to return computer.
In addition, there is provided a kind of compressive strength of rock test side of controllable temperature according to another aspect of the present invention
Method, comprises the following steps：Open X-ray scanning；Rock sample heating to being arranged in HTHP storehouse
Pressurization；Gather the deformation data and X-ray scanning data of rock sample；Handle the data collected.
Further, methods described also includes being swept according to the deformation data and X-ray of the rock sample collected
Data are retouched, adjustment is applied to the temperature and/pressure of rock sample, and gathers the texturing variables of rock sample in real time
According to X-ray scanning data.3-D view is carried out by the X-ray scanning data collected to rock sample to show
Show, judge whether ruptured inside rock sample by image, and then determine the rock sample under given temperature
Compression strength.
The maximum temperature of environment can rise to 120 degrees Celsius during the system detectio of the present invention.During system detectio
The maximum pressure of three axial directions can rise to 70 MPas.
For ease of understanding the scheme and its effect of the embodiment of the present invention, a concrete application example given below.
It will be understood by those skilled in the art that the example is only for the purposes of understanding the present invention, its any detail is not
It is intended to limit the present invention in any way.
Fig. 1 shows the structural representation of the compressive strength of rock test system of the controllable temperature of the present invention.Fig. 2
Show the structural representation in the HTHP storehouse of the present invention.As depicted in figs. 1 and 2, the present embodiment can
The compressive strength of rock test system 1 of controlling temperature includes：X-ray detection device 11, HTHP storehouse 12,
Triaxial stress loading device 13 and heater 14, said apparatus are arranged in sealed lead room 3.In addition, also
Including control device 2, with x-ray detection device 11, triaxial stress loading device 13 and heater 14
Connection, controls said apparatus.
In the present embodiment, HTHP storehouse 12 is shaped as square, and sidewall thickness is 15 centimetres, side wall
Material is polytetrafluoroethylene (PTFE).Sealing shroud 21 is wrapped in outside rock sample to be measured, and triaxial stress loading device is arranged on
Between sealing shroud 21 and HTHP storehouse 12, and apply pressure on rock sample to be measured.
In the present embodiment, triaxial stress loading device 13 includes 6 mechanical arms；6 mechanical arms are symmetrical two-by-two
In the X, Y, Z axis for being arranged on rock sample outer surface to be measured；Mechanical arm includes depression bar 22 and platen 23；Platen
23 are close to the outer surface of rock sample to be measured, and depression bar 22 is vertical with platen 23, the one end of depression bar 22 and platen 23
It is connected, the other end is extended to outside HTHP storehouse 12.Set between platen 22 and rock sample outer surface to be measured
There is strain transducer.Heater 14 includes heating wire, and heating wire is circumferentially disposed at HTHP storehouse 12
On lateral wall.
Fig. 3 shows the compressive strength of rock method of testing of controllable temperature according to an embodiment of the invention
Flow chart.
In the method for the present embodiment, step 1, rock sample to be measured is loaded into high-voltage field；
Step 2, according to experiment purpose, the parameter such as temperature, pressure, loading speed；
Step 3, start-up temperature, pressure-loaded, synchronous averaging X-ray scanning start to rock-like to be measured
Product are heated and pressurizeed；Three direction of principal axis can be carried out applying same pressure, can also be to three axles
Direction applies different pressure respectively, can be specifically configured according to experiment purpose；
Step 4, gather and show rock sample load-deformation curve and 3-D view；
Step 5, sample 3-D view is observed, judges whether to produce microcrack inside rock sample for example, working as
Pressure value in rock sample load-deformation curve reaches 5% range of decrease, or strain value by increase transitions into decline
When increasing 5%, rock sample can be considered as by pressure break.Now, if experiment purpose is only test rock resistance to compression
Intensity, then perform step 6；Such as experiment purpose is observation rock sample compression shattering process, then performs step 7；
Step 6, stop experiment, perform step 8, handle and show experimental result；
Step 7, on-load pressure is continued until sample is crushed completely, execution step 8 handles and shows experiment knot
Really.
The present invention is the compressive strength of rock test system and method for testing of controllable temperature, and the system includes three axles
Stress loading device, x-ray detection device and HTHP storehouse.Rock sample to be measured is arranged in sealing shroud, close
Big envelope is arranged in HTHP storehouse, and heater is arranged on the lateral wall of HTHP storehouse.The method of testing
To control heater, triaxial stress loading device to realize temperature and pressure to being tested rock sample by control unit
Power is loaded, and completes to detect the ess-strain of rock sample to be measured.Using external x-ray scan method, in experiment
During rock sample is monitored in real time.
The present invention can be realized in rock failure process enters Mobile state inspection to the change of rock interior microstructure
Survey, the compression strength change of rock sample under measurement condition of different temperatures, and rock sample rupture process is swept with X-ray
The form of tracing picture finely, intuitively shows that it can be provided effectively for rock rupture mechanics study
Detection method and detection means.
It is described above the presently disclosed embodiments, described above is exemplary, and non-exclusive,
And it is also not necessarily limited to disclosed each embodiment.In the scope and spirit without departing from illustrated each embodiment
In the case of, many modifications and changes will be apparent from for those skilled in the art.
The selection of term used herein, it is intended to best explain the principle of each embodiment, practical application or to market
In technology technological improvement, or be understood that other those of ordinary skill of the art to disclose herein
Each embodiment.
Claims (10)
1. a kind of compressive strength of rock test system of controllable temperature, it is characterised in that including HTHP storehouse,
Triaxial stress loading device, one or more x-ray detection devices；
Each x-ray detection device includes X-ray emitter and X-ray receptor, X-ray emitter and
X-ray receptor is separately positioned on two relative sides of the HTHP storehouse；
Triaxial stress loading device provides triaxial pressure loading for the rock sample in the HTHP storehouse；With
And
The HTHP storehouse is provided with heater.
2. the compressive strength of rock test system of controllable temperature according to claim 1, it is characterised in that
Triaxial stress loading device includes：
6 mechanical arms, 6 mechanical arms are symmetrically disposed in the X, Y, Z axis of rock sample outer surface two-by-two
On；
Each mechanical arm includes depression bar and platen, and platen is close to the outer surface of rock sample, depression bar one end with
Platen is connected.
3. the compressive strength of rock test system of controllable temperature according to claim 2, it is characterised in that
Strain transducer is provided between platen and the rock sample outer surface.
4. the compressive strength of rock test system of controllable temperature according to claim 1, it is characterised in that
The heater includes heating wire, and heating wire is circumferentially disposed on the lateral wall in the HTHP storehouse.
5. the compressive strength of rock test system of controllable temperature according to claim 1, it is characterised in that
Rock sample is square, is arranged in sealing shroud.
6. according to the compressive strength of rock test system of any described controllable temperatures of claim 1-5, it is special
Levy and be, the compressive strength of rock test system of described controllable temperature is positioned in sealed lead room.
7. the compressive strength of rock test system of controllable temperature according to claim 6, it is characterised in that
Also include control device, with the triaxial stress loading device, one or more x-ray detection devices and
The heater connection, and control said apparatus.
8. the compressive strength of rock test system of controllable temperature according to claim 1, it is characterised in that
The shell in the HTHP storehouse is manufactured using polytetrafluoroethylene (PTFE).
9. the compressive strength of rock method of testing of a kind of controllable temperature, it is characterised in that comprise the following steps：
Open X-ray scanning；
To the rock sample temperature-pressure being arranged in HTHP storehouse；
Gather the deformation data and X-ray scanning data of rock sample；
Handle the data collected.
10. the compressive strength of rock method of testing of controllable temperature according to claim 9, its feature exists
In, in addition to 3-D view is carried out to rock sample by the X-ray scanning data that collect shown, according to figure
As judging whether ruptured inside rock sample, and then determine the rock sample compression strength under given temperature.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610118270.1A CN107153032A (en) | 2016-03-02 | 2016-03-02 | The compressive strength of rock test system and method for a kind of controllable temperature |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610118270.1A CN107153032A (en) | 2016-03-02 | 2016-03-02 | The compressive strength of rock test system and method for a kind of controllable temperature |
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Cited By (7)
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|---|---|---|---|---|
| CN108982233A (en) * | 2018-07-06 | 2018-12-11 | 郝文峰 | Material internal deformation and damage measure device under a kind of hot environment |
| CN109632462A (en) * | 2019-01-10 | 2019-04-16 | 北京理工大学 | A kind of material constitutive test method under complex stress condition |
| CN109738594A (en) * | 2019-03-04 | 2019-05-10 | 中国科学院地球化学研究所 | A kind of hydro-thermal large cavity high temperature and pressure flowing experimental provision and experimental method |
| CN112649305A (en) * | 2019-10-12 | 2021-04-13 | 中国石油化工股份有限公司 | Device for testing high-temperature and high-pressure rock core and method for testing high-temperature and high-pressure rock core |
| CN112781956A (en) * | 2020-12-31 | 2021-05-11 | 西南石油大学 | Equipment and method for simulating microwave to crush deep granite |
| CN114428022A (en) * | 2020-10-15 | 2022-05-03 | 中国石油化工股份有限公司 | System and method for detecting tensile strength of rock |
| CN114720263A (en) * | 2022-04-07 | 2022-07-08 | 东北石油大学 | Rock fracture visualization test device and method in deep high-temperature and high-pressure environment |
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| CN104155173A (en) * | 2013-12-26 | 2014-11-19 | 中国石油天然气集团公司 | Optical measurement device and method for physical modulus of rock sample |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108982233A (en) * | 2018-07-06 | 2018-12-11 | 郝文峰 | Material internal deformation and damage measure device under a kind of hot environment |
| CN109632462A (en) * | 2019-01-10 | 2019-04-16 | 北京理工大学 | A kind of material constitutive test method under complex stress condition |
| CN109738594A (en) * | 2019-03-04 | 2019-05-10 | 中国科学院地球化学研究所 | A kind of hydro-thermal large cavity high temperature and pressure flowing experimental provision and experimental method |
| CN109738594B (en) * | 2019-03-04 | 2023-09-01 | 中国科学院地球化学研究所 | Hydrothermal large-cavity high-temperature high-pressure flow experimental device and experimental method |
| CN112649305A (en) * | 2019-10-12 | 2021-04-13 | 中国石油化工股份有限公司 | Device for testing high-temperature and high-pressure rock core and method for testing high-temperature and high-pressure rock core |
| CN112649305B (en) * | 2019-10-12 | 2024-04-09 | 中国石油化工股份有限公司 | Device and method for high-temperature high-pressure core testing |
| CN114428022A (en) * | 2020-10-15 | 2022-05-03 | 中国石油化工股份有限公司 | System and method for detecting tensile strength of rock |
| CN112781956A (en) * | 2020-12-31 | 2021-05-11 | 西南石油大学 | Equipment and method for simulating microwave to crush deep granite |
| CN114720263A (en) * | 2022-04-07 | 2022-07-08 | 东北石油大学 | Rock fracture visualization test device and method in deep high-temperature and high-pressure environment |
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Application publication date: 20170912 |