CN108240942A - A kind of rock fracture experimental system and experimental method - Google Patents
A kind of rock fracture experimental system and experimental method Download PDFInfo
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- CN108240942A CN108240942A CN201611218491.2A CN201611218491A CN108240942A CN 108240942 A CN108240942 A CN 108240942A CN 201611218491 A CN201611218491 A CN 201611218491A CN 108240942 A CN108240942 A CN 108240942A
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- 238000012544 monitoring process Methods 0.000 claims description 18
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- 238000012806 monitoring device Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
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- 238000012545 processing Methods 0.000 claims description 6
- 239000002699 waste material Substances 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 4
- 230000035699 permeability Effects 0.000 claims description 4
- 230000001737 promoting effect Effects 0.000 abstract 1
- 239000000523 sample Substances 0.000 description 7
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- 239000013307 optical fiber Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
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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
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
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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
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- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
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- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0062—Crack or flaws
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0226—High temperature; Heating means
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- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0256—Triaxial, i.e. the forces being applied along three normal axes of the specimen
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- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
- G01N2203/0647—Image analysis
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
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- G01N2203/0658—Indicating or recording means; Sensing means using acoustic or ultrasonic detectors
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Abstract
The invention discloses a kind of rock fracture experimental system, including core pressure resistant vessel, pressure loading device, passive source sound emission harvester, active source ultrasonic signal transmitting/harvester, passive source sound emission recording device, active source ultrasonic signal control/recording device, CT scan device；Core pressure resistant vessel is used for built-in core；Pressure loading device is used to act on core pressure resistant vessel and core；Passive source sound emission harvester, active source ultrasonic signal transmitting/harvester are used to be mounted on core, are connect respectively with passive source sound emission recording device, active source ultrasonic signal control/recording device；CT scan device is arranged on the periphery of core pressure resistant vessel.The invention also discloses a kind of experimental methods using above-mentioned experimental system, acquire CT scan data, core speed and attenuation data and Acoustic Emission location and inverting data.Present invention can ensure that the variation of rock interior structure effectively, in real time, is accurately understood, suitable for promoting and applying.
Description
Technical field
The present invention relates to petrophysics experiment field, more particularly to a kind of rock fracture experimental system and experimental method.
Background technology
Current field Geophysical Monitoring means and indoor rock physics Fracturing Monitoring means, such as micro-seismic monitoring method
With acoustic emission monitor(ing) method etc., inverting class method is belonged to, is especially limited to monitoring system arrangement, inversion accuracy exists certain
Error, so as to can not accurately understand and obtain the generation in crack and dynamic expansion mechanism in rock.And in all kinds of rocks in laboratory
In stone fracturing unit, current experimental facilities is only capable of exploring the rupture process of core from observation acoustic emission signal angle,
Data acquisition means are single, and inversion method error is big, can not well meet in current industrial production and scientific research for big
Data analysis, the demand of dynamic experiment process monitoring.
Invention content
The technical problem to be solved in the present invention is to provide one kind is effective, precision is high, can understand rock interior structure in real time
Dynamic change rock fracture experimental system and experimental method.
In order to solve the above technical problems, it adopts the following technical scheme that：
A kind of rock fracture experimental system, including core pressure resistant vessel, pressure loading device, passive source sound emission acquisition dress
Put, active source ultrasonic signal transmitting/harvester, passive source sound emission recording device, active source ultrasonic signal control/note
Recording device, CT scan device；The core pressure resistant vessel is used for built-in core；The pressure loading device is used to act on core
Pressure resistant vessel and core；The passive source sound emission harvester, active source ultrasonic signal transmitting/harvester are used to install
On core, it is connect respectively with passive source sound emission recording device, active source ultrasonic signal control/recording device；The CT
Scanning means is arranged on the periphery of core pressure resistant vessel.
Further, the passive source sound emission harvester, active source ultrasonic signal transmitting/harvester are combined into one
Body is popped one's head in using PZT piezoelectric ceramic pieces；Accordingly, the passive source sound emission recording device, active source ultrasonic signal control
System/recording device is also integrated.
Further, the core state of rupture monitoring device for being connect with core is further included.
Further, the core state of rupture monitoring device include winding be fixedly arranged at core periphery distribution type fiber-optic and
The fiber-optic signal monitoring processing unit being connect with distribution type fiber-optic.
Further, the pressure loading device includes press and high-pressure fluid loading device；The press is used to act on
Axis pressure loading is provided in the core pressure resistant vessel core internal for it；The high-pressure fluid loading device includes：Pass through confining pressure pipe
The confining pressure oil tank that road is connected with core periphery in core pressure resistant vessel is provided with confining pressure injection pump on the confining pressure pipeline.
Further, the high-pressure fluid loading device further includes：Flow ipe, fluid charge pump and frac tank, institute
It states flow ipe one end to connect with the core axial inlet end in core pressure resistant vessel, other end connecting fluid injection pump is described
Fluid charge pump is connect with frac tank；Flow out pipeline, fluid rear pump and fracturing waste liquor tank, described outflow pipeline one end with
Core axial direction port of export connection in core pressure resistant vessel, other end connecting fluid rear pump, the fluid rear pump and pressure break
Waste liquid tank connects.
Further, the axis pressure/enclose being connect respectively with the press, confining pressure pipeline, flow ipe, outflow pipeline is further included
Pressure/Fluid pressure monitoring device.
Further, the core pressure resistant vessel is equipped with the temperature of heating unit and monitoring core pressure resistant vessel internal temperature
Spend detection device.
A kind of experimental method using above-mentioned rock fracture experimental system includes the following steps：
(1) corresponding core is prepared according to experiment demand, then by passive source sound emission harvester, active source ultrasonic wave
Signal transmitting/harvester is mounted on core；
(2) core is put into core pressure resistant vessel, cooperation pressure loading device carries out loading operation；
(3) in loading procedure, active source ultrasonic signal is controlled by active source ultrasonic signal control/recording device
Transmitting/harvester actively emits ultrasonic signal and is changed with measuring the p-and s-wave velocity value of core with pad value；
(4) in loading procedure, while using CT scan device scanning core, the fractue spacing feelings inside core are obtained
Condition, porosity, permeability and saturation degree situation of change；
(5) after core reaches critical slope langth state, change data drainage pattern is changed to by actively emitting ultrasonic signal
Using passive sound emission observation mode, the acoustic emission signal generated during core rupture is recorded, while encrypts the scanning of CT scan device
Frequency obtains result situation of change inside finer core.
Further, it is true by core state of rupture monitoring device that core, which reaches critical slope langth state, in the step (5)
It is fixed；The core state of rupture monitoring device includes winding and is fixedly arranged at the distribution type fiber-optic of core periphery and connects with distribution type fiber-optic
The fiber-optic signal monitoring processing unit connect.
By using above-mentioned technical proposal, the present invention has at least the following advantages：
1st, experimental system of the invention is effectively by CT scan device, active source ultrasonic signal transmitting/harvester with
Existing passive source sound emission harvester etc. is combined, so as to realize core for the first time in all kinds of rock fracture experimentations
CT dynamic scan, active source signal core speed and attenuation measurement, the polymorphic type signal parallel of passive acoustic emission signal acquisition are high
Accuracy monitoring is analyzed.By CT dynamic scan, we can understand the real-time change of rock interior structure in real time, various to obtain
Physical parameter, such as saturation degree, the real-time parameter of porosity and permeability, and then it is broken in loading to get information about each rocks
Split the migration characteristics of mechanism, crack dynamic development pattern and pore-fluid.
2nd, experimental system of the invention also effectively combines core state of rupture monitoring device, solid in particular by winding
It ties and monitors processing unit in the distribution type fiber-optic of core periphery and the fiber-optic signal that connect with distribution type fiber-optic, utilize core table
Different optic response features corresponding to the fiber-optic monitoring dependent variable that core generates under different stress conditions of face winding distribution,
And then obtain the comprehensive strain characteristics of rock sample.This compares the traditional means of experiment for carrying out core strain monitoring point by point using foil gauge
With higher accuracy and wider array of monitoring scale.
3rd, for experimental method of the invention when core sample ruptures, change data drainage pattern is passive source sound emission
Combine high speed acquisition with CT, rock is met during rapid disruption with this, for the high speed of rupture process, precisely dynamic, prison
It surveys.Using sound emission data collected under this pattern, with reference to CT image scannings as a result, we can verify that core rupture lures
Sounding emits the correspondence of position, rupture mechanism and drilling core fractures, and obtains the dynamic evolution of entire core physical characteristic
Analysis result.
Description of the drawings
Above-mentioned is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention, below
With reference to attached drawing, the present invention is described in further detail with specific embodiment.
Fig. 1 is a kind of structure diagram of rock fracture experimental system of the present invention.
Specific embodiment
As shown in Figure 1, a kind of rock fracture experimental system of the present invention, fills including core pressure resistant vessel 1, pressure-loaded
Put, passive source sound emission harvester, active source ultrasonic signal transmitting/harvester, passive source sound emission recording device, master
Dynamic source ultrasonic signal control/recording device, CT scan device 4, core state of rupture monitoring device.
Wherein：
Core pressure resistant vessel 1 is used for built-in core A；Core pressure resistant vessel 1 can be equipped with heating unit (not shown)
And the temperature-detecting device 11 of 1 internal temperature of monitoring core pressure resistant vessel.
Pressure loading device can provide three axis pressure break conditions, simultaneously for acting on core pressure resistant vessel 1 and core A
Stress loading is improved to core, core is made to generate rupture.Specifically, pressure loading device includes press 21 and high-pressure fluid loads
Device；Press 21 provides axis pressure loading for acting on the core A internal for it of core pressure resistant vessel 1；High-pressure fluid loading dress
Put including：Pass through confining pressure pipeline 221 and the confining pressure oil tank 222 that core A peripheries connect in core pressure resistant vessel 1, confining pressure pipeline 221
On be provided with confining pressure injection pump 223；It further includes：Flow ipe 231, fluid charge pump 233 and frac tank 232, flow ipe
231 one end are connected with the core axial inlet end in core pressure resistant vessel 1, other end connecting fluid injection pump 233, fluid injection
Pump 233 is connect with frac tank 232；Further include outflow pipeline 241, fluid rear pump 243 and fracturing waste liquor tank 242, effuser
241 one end of road is connected with the core axial direction port of export in core pressure resistant vessel 1, other end connecting fluid rear pump 243, fluid
Rear pump 243 is connect with fracturing waste liquor tank 242.By in the loading of axis pressure, confining pressure loading and core of above-mentioned pressure loading device
Portion's Fluid pressure loading, core imitate the rupture event of different conditions.In order to realize more accurately Loading Control, can also set
Put axis pressure/confining pressure/Fluid pressure monitoring device 25, the device respectively with press 21, confining pressure pipeline 221, flow ipe 231, stream
Go out pipeline 341 to connect.
Passive source sound emission harvester, active source ultrasonic signal transmitting/harvester are used to be mounted on core, point
It is not connect with passive source sound emission recording device, active source ultrasonic signal control/recording device；Preferably, passive source sound hair
Penetrate harvester, active source ultrasonic signal transmitting/harvester is integrated, using PZT piezoelectric ceramic pieces pop one's head in 31, i.e., its
Both active source ultrasonic signal transmitting/harvester had been may be used as, can also be used as passive source acoustic emission signal harvester；It is right
Ying Di, the passive source sound emission recording device, active source ultrasonic signal control/recording device are also integrated, and form PZT
Piezoelectric ceramic piece probe control/sound-emission signal recording device 32；PZT piezoelectric ceramic pieces probe control/sound-emission signal recording
Device 32 can control 31 transmitting active source ultrasonic signal of PZT piezoelectric ceramic pieces probe, so as to measure the longitudinal and shear wave of core in real time
Velocity amplitude and pad value；It on the other hand, can a large amount of sound hairs of high-speed record when core deforms upon rupture, changes measurement pattern
Signal is penetrated, realizes record data, and realize the quick storage and data read-write operation of a large amount of sound emission data.
CT scan device is arranged on the periphery of core pressure resistant vessel 1.
Strain sheet form can be used in core state of rupture monitoring device, and distribution type fiber-optic form, preferred distribution can also be used
Formula fiber form, including the fiber-optic signal monitoring for being wrapped in the distribution type fiber-optic 51 of core periphery and being connect with distribution type fiber-optic 51
Processing unit 52, distribution type fiber-optic 51 are fixedly arranged at core A surfaces by hardened glue；By by optical fiber uniformly regularity consolidation
When treating pressure break core face, deformation being generated due to stress variation suffered by core in experimentation, optics in optical fiber can be caused
The change of signal using this response characteristic is monitored and obtains the comprehensive Strain Distribution feature of core and change over time rule in real time
Rule judges the status of core with this and divides bullet modeling deformation phase, final guiding experiment operating process.
Using above-mentioned experimental system when carrying out petrophysics experiment, specific experimental method is broadly divided into following step
Suddenly：
(1) corresponding core A is prepared according to experiment demand, then installed on core A PZT piezoelectric ceramic pieces probe 31 and
Distribution type fiber-optic 51；Wherein, PZT piezoelectric ceramic pieces probe 31 both may be used as active source ultrasonic signal emission/harvester,
Passive source acoustic emission signal harvester can be used as；Distribution type fiber-optic 51 makes it be consolidated in core face using hardened glue,
Accurately to measure the deformation quantity of core.
(2) core A is put into core pressure resistant vessel 1, according to setting experiment Temperature-pressure Conditions adjustment heating unit and pressure
Loading device, and carry out loading operation according to the on-load pressure curve of design；The axis pressure of core is provided by press, the confining pressure of core
It injects in core pressure resistant vessel 1 and provides after mainly being pressurizeed by confining pressure injection pump 223 to confining pressure oil；In some cases, also
The type of injection fluid can be determined according to experiment purpose, determines charge velocity and injection to fluid pressurization is injected inside core A
Pressure and other parameters；
(3) during pressure-loaded, active source ultrasound is controlled by active source ultrasonic signal control/recording device
Wave signal transmitting/harvester actively emits ultrasonic signal and is changed with measuring the p-and s-wave velocity value of core with pad value；
(4) during pressure-loaded, while CT scan core is utilized, obtains the distribution situations of cracks inside core, hole
The situation of change of porosity, permeability and saturation degree；
(5) after core reaches critical slope langth state, change data drainage pattern is changed to by actively emitting ultrasonic signal
Using passive sound emission observation mode, the acoustic emission signal generated during rock rupture is recorded, while use high speed CT scan pattern,
Obtain result situation of change inside finer core.
After experiment, experimental system will provide for the dynamic in whole experiment process, and accurate petrophysical parameter measures
As a result, the migration rule of generation the development details and different fluid in crack in core pores in rock.
In conclusion the present invention devises a kind of completely new experimental system for petrophysics experiment.The experimental system exists
Completely new CT dynamic scans, the detection of active source signal physical properties of rock and optical fiber are introduced on the basis of conventional acoustic emission signal monitoring
Strain monitoring technology.The invention can obtain the high definition core CT structure charts in the experiment of various rock fractures by dynamic scan in real time
Picture is popped one's head in using PZT piezoelectric ceramic pieces and emits active source ultrasonic signal measurement core speed and decay characteristics parameter, simultaneously also
Fiber-optic monitoring means can be utilized to measure each unknown strain amplitude of core, the sound that final acquisition is caused by rock rupture
Emit signal for analyzing and fracture parameters inverting.With reference to more than Various types of data signal, the system can dynamic, efficiently, accurately
Measure the variation of rock items physical parameters, and then inverting obtains in rock the generation growth course in crack and different fluid in core
Migration rule in hole, this also provides important equipment and technology support means for rock physics research.
The above described is only a preferred embodiment of the present invention, not make limitation in any form to the present invention, this
Field technology personnel make a little simple modification, equivalent variations or modification using the technology contents of the disclosure above, all fall within this hair
In bright protection domain.
Claims (10)
1. a kind of rock fracture experimental system, which is characterized in that including core pressure resistant vessel, pressure loading device, passive source sound
Emit harvester, active source ultrasonic signal transmitting/harvester, passive source sound emission recording device, active source ultrasonic wave
Signal control/recording device, CT scan device；
The core pressure resistant vessel is used for built-in core；
The pressure loading device is used to act on core pressure resistant vessel and core；
The passive source sound emission harvester, active source ultrasonic signal transmitting/harvester are used to be mounted on core, point
It is not connect with passive source sound emission recording device, active source ultrasonic signal control/recording device；
The CT scan device is arranged on the periphery of core pressure resistant vessel.
2. rock fracture experimental system according to claim 1, which is characterized in that the passive source sound emission acquisition dress
Put, active source ultrasonic signal transmitting/harvester is integrated, using PZT piezoelectric ceramic pieces pop one's head in；Accordingly, the quilt
Dynamic source sound emission recording device, active source ultrasonic signal control/recording device are also integrated.
3. rock fracture experimental system according to claim 1 or 2, which is characterized in that further include to connect with core
Core state of rupture monitoring device.
4. rock fracture experimental system according to claim 3, which is characterized in that the core state of rupture monitoring device
The fiber-optic signal for being fixedly arranged at the distribution type fiber-optic of core periphery including winding and being connect with distribution type fiber-optic monitors processing unit.
5. rock fracture experimental system according to claim 1 or 2, which is characterized in that the pressure loading device includes
Press and high-pressure fluid loading device；
The press provides axis pressure loading for acting on the core pressure resistant vessel core internal for it；
The high-pressure fluid loading device includes：
The confining pressure oil tank connected by confining pressure pipeline with core periphery in core pressure resistant vessel is provided on the confining pressure pipeline and encloses
Press injection pump.
6. rock fracture experimental system according to claim 5, which is characterized in that the high-pressure fluid loading device also wraps
It includes：
Flow ipe, fluid charge pump and frac tank, described flow ipe one end and the core in core pressure resistant vessel are axial
Input end connects, and other end connecting fluid injection pump, the fluid charge pump is connect with frac tank；
Flow out pipeline, fluid rear pump and fracturing waste liquor tank, described outflow pipeline one end with the core in core pressure resistant vessel
Axial port of export connection, other end connecting fluid rear pump, the fluid rear pump are connect with fracturing waste liquor tank.
7. rock fracture experimental system according to claim 6, which is characterized in that further include and the press, confining pressure pipe
Axis pressure/confining pressure/Fluid pressure monitoring device that road, flow ipe, outflow pipeline connect respectively.
8. rock fracture experimental system according to claim 1 or 2, which is characterized in that the core pressure resistant vessel is equipped with
There is heating unit and monitor the temperature-detecting device of core pressure resistant vessel internal temperature.
9. the experimental method of a kind of rock fracture experimental system using described in claims 1 or 22, which is characterized in that including such as
Lower step：
(1) corresponding core is prepared according to experiment demand, then by passive source sound emission harvester, active source ultrasonic signal
Transmitting/harvester is mounted on core；
(2) core is put into core pressure resistant vessel, cooperation pressure loading device carries out loading operation；
(3) in loading procedure, active source ultrasonic signal is controlled to send out by active source ultrasonic signal control/recording device
/ harvester is penetrated, actively emits ultrasonic signal and is changed with measuring the p-and s-wave velocity value of core with pad value；
(4) in loading procedure, while CT scan device scanning core is utilized, distribution situations of cracks, hole inside acquisition core
The situation of change of porosity, permeability and saturation degree；
(5) after core reaches critical slope langth state, change data drainage pattern is changed to use by actively emitting ultrasonic signal
Passive sound emission observation mode, the acoustic emission signal that record core generates when rupturing, while CT scan device scan frequency is encrypted,
Obtain result situation of change inside finer core.
10. the experimental method of rock fracture experimental system according to claim 9, which is characterized in that in the step (5)
Core, which reaches critical slope langth state, to be determined by core state of rupture monitoring device；The core state of rupture monitoring device includes
The fiber-optic signal monitoring processing unit that winding is fixedly arranged at the distribution type fiber-optic of core periphery and is connect with distribution type fiber-optic.
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| CN201611218491.2A CN108240942A (en) | 2016-12-26 | 2016-12-26 | A kind of rock fracture experimental system and experimental method |
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| CN201611218491.2A CN108240942A (en) | 2016-12-26 | 2016-12-26 | A kind of rock fracture experimental system and experimental method |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108801799A (en) * | 2018-07-05 | 2018-11-13 | 中国地质大学（北京） | Rock fracture physical simulation system and test method |
| CN109001042A (en) * | 2018-09-17 | 2018-12-14 | 中国科学院地质与地球物理研究所 | A kind of three axis hydraulic fracturing experiments devices based on Fluid pressure load |
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| CN112595598A (en) * | 2020-11-24 | 2021-04-02 | 西安科技大学 | Inclined layered coal rock physical strength-sound-light-wave integrated testing device and method |
| CN113107448A (en) * | 2021-04-15 | 2021-07-13 | 中国石油大学(北京) | Fracturing simulation method |
| CN114199688A (en) * | 2021-12-08 | 2022-03-18 | 煤炭科学研究总院 | Triaxial loading test method for coal rock fracturing |
| CN115201235A (en) * | 2022-09-14 | 2022-10-18 | 中国科学院地质与地球物理研究所 | Multi-physical-field imaging method and system based on PET-CT and DAS |
| US11965995B2 (en) * | 2022-09-14 | 2024-04-23 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Multi-physical field imaging method and system based on PET-CT and DAS |
| CN115290761A (en) * | 2022-09-27 | 2022-11-04 | 中国科学院地质与地球物理研究所 | Acoustic emission data reconstruction method and device based on deep learning |
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