CN107907431A - Three axis load pulses hydraulically created fracture extended dynamic monitoring test devices - Google Patents
Three axis load pulses hydraulically created fracture extended dynamic monitoring test devices Download PDFInfo
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- CN107907431A CN107907431A CN201711120190.0A CN201711120190A CN107907431A CN 107907431 A CN107907431 A CN 107907431A CN 201711120190 A CN201711120190 A CN 201711120190A CN 107907431 A CN107907431 A CN 107907431A
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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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
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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
- G01N2203/0001—Type of application of the stress
- G01N2203/001—Impulsive
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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
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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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
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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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
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0062—Crack or flaws
- G01N2203/0066—Propagation of crack
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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
- G01N2203/025—Geometry of the test
- G01N2203/0256—Triaxial, i.e. the forces being applied along three normal axes of the specimen
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- 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
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0658—Indicating or recording means; Sensing means using acoustic or ultrasonic detectors
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Abstract
The invention discloses a kind of three axis load pulses hydraulically created fracture extended dynamic monitoring test devices, it is related to three axis hydraulically created fractures and transmits pressure monitoring, fracture development and the physical simulation experiment system platform of propagation law research, mainly including water pressure monitoring system in fluid injection control system, triaxial stress loading system, seam and sound emission Three-Dimensional Dynamic monitoring system.The present invention can inject all kinds of fracturing fluid systems with different pressures, frequency and realize reservoir hydrfracturing under the triaxial state of stress of simulation different reservoir；And three axis servo loadings are realized during experiment, the function of pressure monitoring and crack Three-dimensional Evolution is transmitted in real-time crack, and research platform is provided for three axis hydraulic fracturing of Study In Reservoir.The present invention is easy to operate, intelligence degree is high, compact-sized, can be good at the fracture damage mechanism of rock in Study In Reservoir hydraulic fracturing process.
Description
Technical field
It is used to simulate under different reservoir pressure environment, different pulse frequency, different fracturing fluid systems the present invention relates to one kind,
Fluid pressure real-time tracking and hydraulic fracture extension three-dimension monitor petrophysics experiment in the experiment of hydraulic fracturing reservoir reconstruction, seam
Simulator.
Background technology
With the continuous development of world energy sources general layout, traditional energy day is becoming tight and atrophy, the shale gas revolution in the U.S.
After success, the unconventional energy resource such as shale gas, coal bed gas and tight gas causes worldwide extensive concern and research.
China's unconventionaloil pool rich reserves, potentiality to be exploited are big, important to concentrate on middle part, but have complex geologic conditions, bury
Deeply, the features such as cost of winning is high.Since unconventionaloil pool reservoir has the feature of low porosity and low permeability, hydraulic fracturing technology is that raising is non-
One of important means and key technology of conventional gas and oil reservoir yield.Conventional hydraulic pressure break is while preferable effect is obtained
There are the problems such as pressure break liquid measure is big, hydraulic pressure great Yi triggers microseism, fracturing fracture is single, pressure break volume is simple.Pulsed water
Pressure break is a kind of fracturing process for being improved on the basis of conventional hydraulic pressure break, mainly with the pulse kinetic energy of waterpower
Make reservoir that fatigue damage, and then vee crack occur, abundant pressure break volume improves the effect of reservoir reconstruction to reach.And at this stage
Research to pulsed water pressure break relatively lacks, and pulsed water fracturing mechanism is not yet clear and definite, and main pulse parameter is to pressure break
Influencing mechanism also need deeply to probe into, thus, establish the pulsed water fracture simulation pilot system of science, further investigate pulsating water
Force and split the mechanism of action, crack extension extension mechanism and reservoir fracturing damage and failure etc. field, to pulsed water fracturing technique
Research and parameter, which are chosen, to have great importance.
Conventional hydraulic pressure break is that highly pressurised liquid is pressed into reservoir, reservoir fracture is formed crack network to improve reservoir
Permeability, improves yield.Pulsed water pressure break uses certain pulse frequency fracturing rock, can reduce fracturing pressure, increase is split
The extension length of seam and the complexity for improving Fracture Networks.
At present, in terms of three axis pulsed water pressure break reservoir reconstructions and fracturing fracture expand seam research also without comparison system into
Ripe experimental rig, research in this respect are relatively deficient.Existing three axis hydraulic fracturing is tested most of scientific research institutions and is used
The rock core of Φ 50 is as sample.There are following defect for existing correlation hydraulic fracturing experimental rig：
1st, there was only constant pressure hydraulic pressure, no pulse frequency, or there are pulse frequency, but pulse frequency can not be adjusted in real time
Section.
2nd, the extension monitoring to fracturing fracture, can only be visually observed after pressure；Or under acoustic emission monitor(ing), also because
For sample is excessive, physical difference and signal data distortion etc., so lacking the ability of dynamic monitoring crack three-dimensional extended extension.
3rd, existing hydraulic fracturing device can only monitor fracturing fluid inlet pressure, can not monitor fracturing fluid in fracturing process
Pressure value changes, that is, lacks transmission pressure value of the monitoring in the extension extension of crack.
4th, in existing hydraulic fracturing device, water pressure monitoring and acoustic emission monitor(ing) are all independent tests in seam, do not form one
A dynamic monitoring system synchronously triggered.
The content of the invention
The present invention provides a kind of three axis load pulses hydraulically created fracture extended dynamic monitoring test devices, it is mainly gram
Take the acrotism stamping press in existing experimental rig, crack extension cannot carry out three-dimension monitor and each monitoring system in real time and can not unify
The defects of coordination, this pilot system can simulate reservoir rock under triaxial state of stress, realize with different fracturing fluid systems into
Row pulse or continuous fluid pressure break, and fracture propagation pressure tracking and monitoring, crack extended dynamic real-time three-dimensional monitor, analysis pressure
The growth category and spread scenarios in crack, research platform is provided for research pulsed water pressure.
The technical solution adopted by the present invention to solve the technical problems is：The extension of three axis load pulses hydraulically created fractures is dynamic
State monitoring test device, it includes fluid injection control system, impulse generator, triaxial stress loading system, three axis SERVO CONTROL systems
System and monitoring system；Wherein：
The fluid injection control system is opened by container cell, high-pressure pump, the first multiple-way valve, first switch valve, intermediate receptacle, second
Close valve, the second multiple-way valve, inlet pressure sensor composition；The high-pressure pump is connected by the first multiple-way valve, first switch valve
To 3 intermediate receptacles, it acts as the liquid in container cell is uninterruptedly injected different fracturing fluid systems；The inlet pressure
Sensor, to monitor inlet hydraulic.
The impulse generator includes pulse generating unit and Pulse Width Control end, it is installed on the second multiple-way valve and inlet
Between pressure sensor.After impulse generator is removed or closed, continuous stream injection pressure break can be carried out.
The triaxial stress loading system is supervised by core holding unit, axis pressure loading device, ring pressure loading device, pressure transmission
Survey device, Acoustic Emission location monitoring device, back-pressure valve, axis pressure device, ring pressure loading device and balance monitoring device composition；It is described
Core holding unit is tubular structure, and axis pressure loading device can give sample both ends in cylinder to provide axial compressive force, triaxial stress loading system
The ring pressure loading device of system is provided to sample to be enclosed to pressure；The pressure transmission monitoring device is made of 4 pressure monitoring holes, its
It is equally distributed on core holding unit.The Acoustic Emission location monitoring device is made of 3 pairs of acoustic emission monitor(ing) holes, its perpendicular point
Cloth is on core holding unit cylinder；The back-pressure valve is installed on core holding unit liquid outlet position；The balance monitoring device energy
The quality of monitoring liquid outlet quantity in real time.
The three axis servo-control system includes high-pressure pump Servocontrol device, ring pressure Servocontrol device, axis pressure servo
Control device.
The monitoring system includes water pressure monitoring system, inlet pressure prison in sound emission Three-Dimensional Dynamic monitoring system, seam
Examining system and balance monitoring system；Water pressure monitoring system includes pressure sensor, acquisition software, its pressure sensor in the seam
On 4 pressure monitoring holes, the transmission pressure on rock core body in fracturing process is monitored；The sound emission Three-Dimensional Dynamic monitoring
System includes acoustic emission probe, signal picker, sound emission software, its sound emission software is incorporated into microcomputer, acoustic emission probe
It is arranged on 3 pairs of acoustic emission monitor(ing) holes, it mainly monitors the development spread scenarios in rock core crack.
The microcomputer synchronizes coordination to three axis servo-control systems and monitoring system, in the controllable management shape of servo
State, which raises the collection validity to data and the feedback sensitive degree to experimental condition.
All fluid injection tubing use the high voltage bearing material of anti-corrosion, and tubing bore >=Φ 6mm, reduces the tube wall that fracturing fluid flows
Resistance.
The three axis servo-control systems and monitoring system, phase is carried out by voltage synchronous trigger mechanism by microcomputer (18)
Mutually collaboration and control.
The pressure transmission monitoring device is by first pressure monitoring holes, second pressure monitoring holes, the 3rd pressure monitoring hole
Formed with the 4th pressure monitoring hole；Using the cylinder midpoint of core holding unit length direction as basic point, first pressure monitoring holes and
Four pressure monitoring holes, second pressure monitoring holes and the 3rd pressure monitoring hole are symmetrically equally distributed on core holding unit；Monitoring holes
In pressure sensor is installed, sensor is connected in pressure transmission monitoring system by data cable.
The Acoustic Emission location monitoring device is by first pair of acoustic emission monitor(ing) hole, second pair of acoustic emission monitor(ing) hole and the 3rd
Acoustic emission monitor(ing) hole is formed；There are two monitoring holes per a pair of acoustic emission monitor(ing) hole, and be symmetrically distributed in core holding unit cylinder
On；3rd pair of acoustic emission monitor(ing) hole is located at the cylinder point midway of core holding unit length direction, and monitors and fill with pressure transmission
Put and be in same plane, first pair of acoustic emission monitor(ing) hole and second pair of acoustic emission monitor(ing) hole are symmetrically distributed in the 3rd pair of sound emission prison
The left and right sides of gaging hole, and first pair of acoustic emission monitor(ing) hole and second pair of acoustic emission monitor(ing) hole respectively with the 3rd pair of acoustic emission monitor(ing)
Hole is in vertical distribution, this three pairs of monitoring holes are in vertical distribution on core holding unit.
Each sound in first pair of acoustic emission monitor(ing) hole, second pair of acoustic emission monitor(ing) hole and the 3rd pair of acoustic emission monitor(ing) hole
Launch monitor hole is made of the first gasket, separating tube, waveguide rod, pressure cap, the second gasket and fastening nut；Waveguide rod both ends
Rock core and acoustic emission probe are contacted respectively, for signal transmission；Waveguide rod is completely cut off by separating tube and protected, divided through ring pressure space
Pipe is fixed by the first gasket and pressure cap, ensures the leakproofness between separating tube and ring pressure space；By the second gasket, fastening
Nut ensures the leakproofness between waveguide rod and separating tube, while waveguide rod is compressed by the second gasket by fastening nut and pasted
Close, contacted with rock core well；Signal is reached on acoustic emission probe by waveguide rod, then by signal picker, is connected into sound emission
In Three-Dimensional Dynamic monitoring system.
In the acoustic emission probe placement and acoustic emission monitor(ing) hole fastening nut, fixing to be adjacent to by probe gripper makes itself and ripple
Guide rod fits closely.
Three axis load pulses hydraulically created fracture extended dynamic monitoring test device provided by the invention, has following special
Point：
1st, the reservoir stress state and underground hydraulic fracturing Essential Environment of Different Strata depth can be simulated；2nd, can provide can
Control the pulse hydraulic pressure of Frequency Adjustable；3rd, the transmission pressure in rock sample crack in fracturing process can be monitored；4th, three-dimensional cracking can be monitored in real time
Develop spread scenarios and other relevant parameters.The system enriches the experimental condition of research unconventional energy resource hydraulic fracturing, can be into
The contrast test of row pulsed water pressure break and conventional hydraulic pressure break, test platform is provided for research hydraulic fracturing.
Brief description of the drawings
Fig. 1 is three axis load pulses hydraulically created fracture extended dynamic monitoring test apparatus structure schematic diagrams of the invention；
Fig. 2 is the layout drawing of pressure monitoring hole and acoustic emission monitor(ing) hole on core holding unit；
Fig. 3 is acoustic emission monitor(ing) pore structure figure.
In figure, 1- container cells, 2- high-pressure pumps, the first multiple-way valves of 3-, 4- first switch valves, 5- intermediate receptacles, 6- second opens
Close valve, the second multiple-way valves of 7-, 8- inlet pressure sensors, 9- impulse generators, 10- core holding units, 11- pressure transmission prison
Survey device, 12- rock cores, 13- rings pressure loading device, 14- Acoustic Emission location monitoring devices, 15- axis pressure loading device, 16- back pressure
Valve, 17- balance monitoring devices, 18- microcomputers, 19- core holding unit cylinders, 20- first pressure monitoring holes, 21- first send out sound
Monitoring holes are penetrated, 22- second is to acoustic emission monitor(ing) hole, the 3rd pair of acoustic emission monitor(ing) hole of 23-, 24- gum covers, 25- rings pressure space, 26-
Cylinder, the first gaskets of 27-, 28- separating tubes, 29- waveguide rods, 30- pressure caps, the second gaskets of 31-, 32- fastening nuts, 33-
Acoustic emission probe, 34- probe grippers, 35- second pressure monitoring holes, the 3rd pressure monitoring holes of 36-, the 4th pressure monitoring holes of 37-.
Embodiment
In order to make technical scheme become apparent from understanding, below in conjunction with the accompanying drawings with embodiment to the present invention
It is described in further detail.
Refering to Fig. 1, pulsed water liquid injection system by high-pressure pump 2, the first multiple-way valve 3, first switch valve 4, intermediate receptacle 5,
The fluid injection control system and impulse generator 9 that second switch valve 6, the second multiple-way valve 7, inlet pressure sensor 8 form form.
2 adjustable liquid filling pressure of high-pressure pump and fluid injection flow, liquid filling pressure 0-40MPa, flow adjustment range 0.01-9.99mL/s.
Using 5 displacement fracturing fluid of intermediate receptacle, it can realize while inject the fracturing fluid and high pressure pump operation height of different systems
The fracturing fluid system of sand is sticked, taken, ensures reliable, the safety of pressure break.Displacement fracturing fluid enters impulse generator 9, produces pulse pressure
Power, pulses range 0-10Hz.8 frequency acquisition of inlet pressure sensor is 100 times/s, can be in real time to liquid injection port pressure
Split hydraulic coupling, frequency is monitored.Close and remove impulse generator 9, it can be achieved that continuous stream fluid injection.
Refering to Fig. 1, triaxial stress loading and monitoring room are by core holding unit 10, axis pressure loading device 15, ring pressure loading dress
13, pressure transmission monitoring device 11, Acoustic Emission location monitoring device 14, back-pressure valve 16, balance monitoring device 17 is put to form.Rock core
Specification is Φ 100mmx100-200mm, and axial compressive force loading provides 0-50MPa, and ring pressure is loaded as 0-50MPa.Axis pressure system, ring
Pressure system, liquid injection system three are controlled by servo microcomputer, precisely adjustable, ensure the feasibility of pressure break.Apply Structure Under Axial Compression in rock
12 both ends of the heart, prevent fluid injection from being oozed from ring avris.Pressure transmission monitoring device 11 is used to monitor crack of the rock core in fracturing process
Pressure is transmitted, Acoustic Emission location monitoring device 14 is used for the Three-Dimensional Dynamic position monitor of fracture development extension.Back-pressure valve 16 can
There is provided it is multiple go out hydraulic pressure difference, the quality of 17 real-time dynamic monitoring liquid outlet quantity of balance monitoring device.
Refering to Fig. 1, microcomputer is made of three axis servo-control systems and monitoring system.
Refering to Fig. 2, pressure transmission monitoring device 11 and sound emission Position monitoring devices 14 are in 10 cylinder 26 of core holding unit
On detailed arrangement.12 specification of rock core of core holding unit 10 is Φ 100mmx100-200mm, and pressure transmission monitoring device 11 is
4 pressure monitoring hole compositions, its homogenous linear are symmetrically distributed on cylinder 26, are spaced 50mm, the first pressure prison on both sides two-by-two
20 and the 4th pressure monitoring hole 37 of gaging hole is symmetrical and apart from 26 edge 25mm of cylinder respectively, so relatively uniformly supervises comprehensively
Measure crack and transmit pressure value.Acoustic Emission location monitoring device 14 is by 3 pairs of acoustic emission monitor(ing) holes, per symmetrical point of monitoring holes of a pair of
Cloth is on cylinder 26.First pair of acoustic emission monitor(ing) hole 23 is in same plane with pressure transmission monitoring device, it is distributed in cylinder
26 center, it is each one up and down, symmetrical；Second pair of acoustic emission monitor(ing) hole 21 and the 3rd pair of acoustic emission monitor(ing) hole 22 are divided
Cloth in same plane, two pairs at a distance of 100mm, be in 90 ° with first pair of 23 place plane of acoustic emission monitor(ing) hole.Such spatial distribution,
The development in crack and spread scenarios can be formed Three-Dimensional Dynamic monitoring, research contents can be enriched and crack threedimensional model is provided.
Refering to Fig. 3, the detailed structure view in acoustic emission monitor(ing) hole.Waveguide rod 29 is positioned in monitoring holes, and separating tube 28 plays branch
Support, the effect of fluid partitioning protection waveguide rod.First gasket 27 predominantly prevents ring between cylinder 26 and ring pressure space 25
The liquid leakage in space 25 is pressed into monitoring holes, while also ensures the loading of ring pressure.Pressure cap 30 is threadably secured separating tube
28.32 main function of fastening nut makes it be bonded rock core 12 and prevents waveguide rod 29 by cylinder pressure top for compression waveguide rod 29
Go out, ensure the reliability and stability of data acquisition.Have at the same time between waveguide rod 29 and pressure cap 30, fastening nut 32 second close
Packing 31, it acts as ensure stable signal transmission, undistorted and monitoring holes sealing.Acoustic emission probe 33 and waveguide rod 29 it
Between connected by sound emission couplant, ensure both contact it is complete, closely sealed.Spring built in probe gripper 34 plays fixed, abutting sound
The effect of transmitting probe 33.
Tested using the three axis load pulses hydraulically created fracture extended dynamic monitoring test devices of the present invention, it is led
The test procedure wanted.
1st, 100 rock cores of Φ are made and ensure rock core height and both ends parallel alignment, while drill through the pilot hole of Φ 8mm；Configuration
Fracturing fluid is stored in intermediate receptacle 5.
2nd, installation and debugging seam in water pressure monitoring system, sound emission Three-Dimensional Dynamic monitoring system, high-pressure pump Servocontrol device,
Each systems such as ring pressure Servocontrol device, axis pressure Servocontrol device, inlet pressure monitor system, balance monitoring system.
3rd, 100 rock cores of Φ are placed in core holding unit 10.
4th, after mixing up pressure, flow parameter, high-pressure pump 2 is opened, opens the first multiple-way valve 3, selection opens corresponding first
Switch valve 4, the fracturing fluid in displacement intermediate receptacle 5, while second switch valve 6 is opened, the second multiple-way valve 7, fracturing fluid enters arteries and veins
Rush in generator 9, produce pulsed water pressure, while inlet pressure sensor 8 carries out the monitoring of pressure, frequency.
5th, adjustment axis pressure loading device 15, reaches predetermined shaft pressure value, then regulation ring pressure loading device 13, reaches experiment institute
Need pressure.
6th, fracturing fluid enters from 10 inlet of core holding unit, starts to produce crushing test to rock core 12.Work as liquid filling pressure
When reaching predetermined value and stablizing, automatic synchronization is triggered water pressure monitoring system and acoustic emission monitoring system in seam, microcomputer 18 by system
The test data of overall process will be gathered, until off-test.
7th, there is back-pressure valve 16 in 10 exit of core holding unit, there is provided variable pressure difference.Balance monitoring device 17 at the same time
Liquid outlet quantity will be monitored automatically.
8th, if desired for different fracturing fluids are carried out, corresponding first switch valve 4 and second switch valve 6 can be opened.
9th, off-test, stops data collection task, food preservation test data, close high-pressure pump 2, unloading ring pressure, axis pressure, close
First switch valve 4 and second switch valve 6 are closed, opening intermediate receptacle 5 handles the pressure in remaining fracturing fluid and balance monitoring device 17
Split waste liquid.
Claims (6)
1. three axis load pulses hydraulically created fracture extended dynamic monitoring test devices, including fluid injection control system, pulse generation
Device, triaxial stress loading system, three axis servo-control systems, seam in water pressure monitoring system and sound emission Three-Dimensional Dynamic monitoring system
System, it is characterised in that：
The fluid injection control system includes container cell (1), high-pressure pump (2), the first multiple-way valve (3), first switch valve (4), centre
Container (5), second switch valve (6), the second multiple-way valve (7) and inlet pressure sensor (8)；The high-pressure pump (2) passes through
One multiple-way valve (3), first switch valve (4) are connected to multiple intermediate receptacles (5), and the liquid in container cell (1) is uninterruptedly independent
Inject different fracturing fluid systems；
The impulse generator (9) is placed between the second multiple-way valve (7) and inlet pressure sensor (8)；
The triaxial stress loading system includes core holding unit (10), axis presses loading device (15), ring presses loading device (13),
Pressure transmission monitoring device (11), Acoustic Emission location monitoring device (14), back-pressure valve (16) and balance monitoring device (17)；It is described
Core holding unit (10) is cylindrical structure, and axis pressure loading device (15) provides axial compressive force, ring to rock core (12) both ends in cylinder
Pressure loading device (13) is provided to rock core (12) in cylinder to be enclosed to pressure；The pressure transmission monitoring device (11) is linearly arranged in rock
On heart clamp holder (10)；Acoustic Emission location monitoring device (14) space layout is on core holding unit (10)；
The three axis servo-control system includes high-pressure pump Servocontrol device, ring pressure Servocontrol device and axis pressure SERVO CONTROL
Device, ring pressure Servocontrol device and axis pressure Servocontrol device provide respectively rock core in cylinder (12) enclose to and pressure at two ends；
The monitoring system includes water pressure monitoring system, inlet pressure monitoring system in sound emission Three-Dimensional Dynamic monitoring system, seam
System and balance monitoring system；Sound emission Three-Dimensional Dynamic monitoring system is to be adopted multiple acoustic emission probes (33) by signal picker
The information source collected is connected in acoustic emission monitor(ing) software by data cable, forms a complete collection monitoring system；It is described
Water pressure monitoring system is that multiple pressure sensors are installed on pressure transmission monitoring holes in seam, hydraulic pressure value in the seam of collection crack,
By in hydraulic pressure acquisition software in data cable access seam, realizing the real-time monitoring of hydraulic pressure in opposite joint.
2. three axis load pulses hydraulically created fracture extended dynamic monitoring test devices, its feature exist according to claim 1
In：The three axis servo-control systems and monitoring system, are mutually assisted by voltage synchronous trigger mechanism by microcomputer (18)
With with control.
3. three axis load pulses hydraulically created fracture extended dynamic monitoring test devices, its feature exist according to claim 1
In：The pressure transmission monitoring device (11) is by first pressure monitoring holes (20), second pressure monitoring holes (35), the 3rd pressure
Monitoring holes (36) and the 4th pressure monitoring hole (37) composition；Using the cylinder midpoint of core holding unit (10) length direction as basic point,
First pressure monitoring holes (20) and the 4th pressure monitoring hole (37), second pressure monitoring holes (35) and the 3rd pressure monitoring hole (36)
Linear symmetric is equally distributed on core holding unit (10)；Pressure sensor is installed, sensor passes through data cable in monitoring holes
It is connected in pressure transmission monitoring system.
4. three axis load pulses hydraulically created fracture extended dynamic monitoring test devices, its feature exist according to claim 1
In：The Acoustic Emission location monitoring device (14) is by first pair of acoustic emission monitor(ing) hole (21), second pair of acoustic emission monitor(ing) hole
(22) formed with the 3rd pair of acoustic emission monitor(ing) hole (23)；There are two monitoring holes per a pair of acoustic emission monitor(ing) hole, and be symmetrically distributed in
On core holding unit cylinder (26)；3rd pair of acoustic emission monitor(ing) hole (23) is located at the cylinder of core holding unit (10) length direction
(26) point midway, and it is in same plane, first pair of acoustic emission monitor(ing) hole (21) and with pressure transmission monitoring device (11)
Two pairs of acoustic emission monitor(ing) holes (22) are symmetrically distributed in the left and right sides of the 3rd pair of acoustic emission monitor(ing) hole (23), and first pair of sound emission
Monitoring holes (21) and second pair of acoustic emission monitor(ing) hole (22) are in vertical distribution with the 3rd pair of acoustic emission monitor(ing) hole (23) respectively, this three
To monitoring holes in vertical distribution on core holding unit (10).
5. three axis load pulses hydraulically created fracture extended dynamic monitoring test devices, its feature exist according to claim 4
In：First pair of acoustic emission monitor(ing) hole (21), second pair of acoustic emission monitor(ing) hole (22) and the 3rd pair of acoustic emission monitor(ing) hole (23)
In each acoustic emission monitor(ing) hole by the first gasket (27), separating tube (28), waveguide rod (29), pressure cap (30), the second gasket
(31) formed with fastening nut (32)；Waveguide rod (29) both ends contact rock core (12) and acoustic emission probe (33) respectively, for believing
Number transmission；Waveguide rod (29) is completely cut off by separating tube (28) and protected, separating tube (28) is by the first gasket through ring pressure space (25)
(27) and pressure cap (30) is fixed, ensures the leakproofness between separating tube (28) and ring pressure space (25)；By the second gasket (31),
Fastening nut (32) ensures the leakproofness between waveguide rod (29) and separating tube (28), while waveguide rod (29) is by fastening nut
(32) compressed and be bonded by the second gasket (31), contacted well with rock core (12)；Signal is reached into sound hair by waveguide rod (29)
Penetrate on probe (33), then by signal picker, be connected into sound emission Three-Dimensional Dynamic monitoring system.
6. three axis load pulses hydraulically created fracture extended dynamic monitoring test devices, its feature exist according to claim 5
In：The acoustic emission probe (33) is positioned in acoustic emission monitor(ing) hole fastening nut (32), is adjacent to by probe gripper (34) fixation
It is set to be fitted closely with waveguide rod (29).
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108386177A (en) * | 2018-04-17 | 2018-08-10 | 东营市鼎晟宸宇油气科技有限公司 | The 3-dimensional multi-layered more well pressure break supporting cracks of one kind monitoring experimental system and method in real time |
| CN108931516A (en) * | 2018-05-31 | 2018-12-04 | 北京大学 | Save system parameter optimization method and the Serum Elements quantitative analysis method of sample volume |
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| CN110056335B (en) * | 2018-11-27 | 2023-11-03 | 安阳工学院 | Triaxial multi-crack hydraulic fracturing experimental device and experimental method |
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| CN113982572A (en) * | 2021-10-22 | 2022-01-28 | 中国石油大学(北京) | Fracturing energy storage integrated experimental method and experimental device |
| CN114136800A (en) * | 2021-12-01 | 2022-03-04 | 中南大学 | Multi-field coupling low-permeability rock sample hydraulic fracture evolution multi-scale synchronous monitoring device |
| CN114136800B (en) * | 2021-12-01 | 2024-04-26 | 中南大学 | Multi-field coupling hypotonic rock sample hydraulic fracture evolution multi-scale synchronous monitoring device |
| CN114166649A (en) * | 2021-12-08 | 2022-03-11 | 中南大学 | Experimental device and experimental method for simulating in-situ deep shale drilling and hydraulic fracturing |
| CN114166649B (en) * | 2021-12-08 | 2024-03-12 | 中南大学 | Experimental device and experimental method for simulating in-situ deep shale drilling and hydraulic fracturing |
| CN114922599A (en) * | 2022-04-19 | 2022-08-19 | 中国矿业大学 | Pulse frequency control method for realizing efficient hydraulic fracturing of rock stratum |
| CN116591653A (en) * | 2023-05-18 | 2023-08-15 | 西南石油大学 | Dynamic monitoring method for natural cracks under true triaxial hydraulic fracturing and related equipment |
| CN117969789A (en) * | 2024-03-29 | 2024-05-03 | 山东省地矿工程勘察院(山东省地质矿产勘查开发局八〇一水文地质工程地质大队) | Water regime prediction method and monitoring system for underground water resource |
| CN118655925A (en) * | 2024-08-19 | 2024-09-17 | 中国科学院武汉岩土力学研究所 | Experimental method for crack initiation and propagation control research of hydraulic fracturing cracks of rock |
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