CN209542309U - A kind of large scale true triaxial hydraulic fracturing simulation test device - Google Patents
A kind of large scale true triaxial hydraulic fracturing simulation test device Download PDFInfo
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- CN209542309U CN209542309U CN201920043019.2U CN201920043019U CN209542309U CN 209542309 U CN209542309 U CN 209542309U CN 201920043019 U CN201920043019 U CN 201920043019U CN 209542309 U CN209542309 U CN 209542309U
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Abstract
A kind of large scale true triaxial hydraulic fracturing simulation test device, it is made of large scale true triaxial loading module, hydraulic servo pump pressure module, Acoustic Emission location module, infrared monitoring module, sample handling module and computer, wherein load plate by the mutually matched inner panel of spherical surface and outside plate by being composed.The advantages of carrying out shale hydraulic fracturing simulation test with the device be, the influence of test result accuracy not test sample processing dimension and parallel misalignment improves the reliability of test to reduce the requirement to specimen size machining accuracy；It can shale loading conditions in three axis loading chambers during real-time monitoring test；It can satisfy more sized samples pressure break conditions；Cooperate high-speed camera to be used for uniaxial hydraulic fracturing simulation test, can directly observe waterpower crack propagation rule, realize a tractor serves several purposes.
Description
Technical field
The utility model relates to shale gas exploitation technical field, especially a kind of large scale true triaxial hydraulic fracturing simulation examination
Experiment device.
Background technique
Shale gas refer to be present under absorption or free state it is natural in mud stone, high-carbon mud stone, shale and flour sand homogenous rock stratum
Gas.China's shale gas is resourceful, and with the progress of production technique, the development and utilization of shale gas enter fast-developing period.
Shale gas reservoir has the characteristics that matter is close hypotonic, and shale gas reservoir can not be exploited by conventional gas under natural conditions
Technology obtains industrial production capacity, and carrying out fracturing reform to shale reservoir using hydraulic fracturing technology to obtain industrial gas is to open at present
Adopt the main path of shale gas.Hydraulic fracturing improves fractured well and initially produces to shale reservoir seepage flow space and flow conductivity is increased
Amount and ultimate recovery all have positive effect.And the indoor hydraulic fracturing physical simulation experiment carried out based on reservoir characteristics, it can
Shale hydraulic fracturing basic data and fracture initiation, propagation law are obtained, to instruct live pressing crack construction and prediction production capacity to provide
Scientific basis.
It is forced for shale gas reservoir indoor water and splits physical simulation experiment, generally use large scale true triaxial hydraulic fracturing mould
Quasi- experimental rig is completed.For example, University of Petroleum Chen Mian etc. is in " large scale true triaxial hydraulic fracturing simulation test and analysis "
Disclosed in (supplementary issue of volume 19 " rock-soil mechanics and engineering journal " in June, 2000 year) by large scale true triaxial test frame, servo
The large scale true triaxial hydraulic fracturing simulation test device of booster pump, Acoustic radiating instrument and other auxiliary devices composition；
CN107907422A patent document is disclosed to contain temperature control by what loading module, pump pressure module, sound emission module, handling module formed
The large scale true triaxial hydraulic fracturing testing machine of system.There are following for these large scale true triaxial hydraulic fracturing simulation test devices
Defect:
1, the load plate being further applied load to sample is single plate, and flat load plate wants the size and the depth of parallelism of sample
Ask extremely harsh.It is irregular to try when machining deviation causes sample dimensions and the depth of parallelism to be unable to get guarantee because specimen size is larger
Sample is further applied load in plate load plate and acts on lower stress bias can occur, and influences to load effect；And irregular sampling is poured
It builds concrete and becomes regular sample, and will affect the accuracy of Acoustic Emission location, the reliability of test result reduces.
2, sample and load plate are in close contact, and load space is limited, and three axis loading chamber of real-time monitoring is unable to during test
Inner case.
3, loading device is fixed on reaction frame, and loading device stroke is small, to the poor for applicability of specimen size size.
4, apparatus function is single, is only used for load and applies and hydraulic fracturing, during cannot recording hydrofracturing in real time
Shale surface fracture initiation extends situation.
Utility model content
It is above-mentioned to overcome the purpose of the utility model is to provide a kind of large scale true triaxial hydraulic fracturing simulation test device
The defect of the prior art.
Large scale true triaxial hydraulic fracturing simulation test device provided by the utility model, including for large scale pros
Body sample apply triaxial load with the large scale true triaxial loading module of simulated ground stress, for sample delivered inside high pressure pressure
Split the hydraulic servo pump pressure module of liquid, for the Acoustic Emission location mould of crack propagation law in real-time monitoring hydraulic fracturing process
Block, the sample handling module and computer for loading and unloading for sample；Its main feature is that further including for real-time during testing
It monitors the infrared monitoring module of three axis loading chamber inner cases and is split for uniaxial loading hydraulic fracturing simulation test record waterpower
Stitch the high-speed camera of extension situation；
The large scale true triaxial loading module includes electro-hydraulic servo press machine, three axis loading chambers, to the of sample pressure
One flat jack and the second flat jack and true triaxial load servo system control case；Wherein there is upper pad in three axis loading chambers
Plate, lower bolster and five pieces of load plates；Every piece of load plate the mutually matched inner panel of spherical surface and outside plate by being made up of, the spherical surface of inner panel
For spirogyrate, the spherical surface of outside plate is concave shape, and the diameter r2 of spherical surface bottom surface is the 90% of load plate side length L；In five pieces of load plates
There are four facades of four pieces of corresponding samples to be placed in four edge of three axis loading chambers, wherein two pieces of adjacent outside plates respectively with it is described
First flat jack and the second flat jack connect；Another piece of load plate is located at the top of the upper padding plate, outside plate with
Electro-hydraulic servo press machine connects；The upper padding plate has square fracturing fluid feed-line channel；Four angles of the lower bolster
There is lifting circular hole at place, has fracturing fluid outlet on three axis loading chamber pedestals；
Hydraulic servo pump pressure module include air compressor, gas-liquid booster pump, pressure sensor, data logger,
Intermediate receptacle, fracturing fluid storage tank, electric pressuring pump, control electronic box, the first needle valve, the second needle valve, third needle valve, the
Four needle valves, triple valve, four-way valve, the first water storage container, the second water storage container, fracturing fluid returnable, high pressure line, pressure break
Liquid feed-line, flow pipe and snorkel；One end entrance of the gas-liquid booster pump connects air compressor by snorkel, empty
Air compressor connects control electronic box by conducting wire, and another end entrance of gas-liquid booster pump, which connects the first water storage by flow pipe, to be held
Device, the outlet of gas-liquid booster pump connect the first end of four-way valve by high pressure line, and the second end of four-way valve passes through high pressure line
Pressure sensor is connected, pressure sensor is connected by conducting wire with data logger, and data logger passes through conducting wire and computer
Connect, the third end of four-way valve is connected by high pressure line and the first needle valve with the second water storage container, the 4th end of four-way valve
The entrance of intermediate receptacle is connected by high pressure line, the outlet of intermediate receptacle connects the first end of triple valve by high pressure line,
The second end of triple valve connects the second needle valve, and the other end of the second needle valve passes through in fracturing fluid feed-line and sample (7)
Simulation wellbore hole connect, the third end of triple valve passes through the outlet phase of high pressure line and the 4th needle valve and fracturing fluid holding vessel
It connects, the entrance of fracturing fluid holding vessel is connected by high pressure line with electric pressuring pump, and electric pressuring pump passes through conducting wire and control electricity
Case connects, and control electronic box connects with computer；One end of third needle valve connects the fracturing fluid by pipeline and exports, the other end
Connected by high pressure line with fracturing fluid returnable；
The Acoustic Emission location module includes full information acoustic emission analysis instrument host, acoustic emission signal amplifier and sound emission
Probe；Acoustic emission probe is respectively arranged in the vertex of four facades of sample, and passes through conducting wire and acoustic emission signal amplifier phase
It connects, acoustic emission signal amplifier is connected by conducting wire with full information acoustic emission analysis instrument host, full information acoustic emission analysis instrument master
Machine is connected by conducting wire with computer；
The infrared monitoring module includes infrared monitoring host, infrared camera；Infrared camera is installed on three axis
Four, loading chamber top vertex, and connect with infrared monitoring host, infrared monitoring host is connected by conducting wire with computer；
The sample handling module includes transfer cart driving motor, loading chamber transfer cart, transfer cart track, transfer cart transmission
Axis and hoisting wirerope；Transfer cart track is identical as the substructure height of electro-hydraulic servo press machine, and is fixed on electricity with fixing bolt
On the pedestal of liquid servo-pressing machine；Transfer cart driving motor by the transfer cart transmission shaft drive load room transfer cart advance and
It retreats, transfer cart driving motor is connect with control electronic box；There is transfer cart limiting device in the rear end of transfer cart track；The hoisting steel
Cord upper and lower ends have T steel respectively, and T steel can be provided with three axis loading chambers, four vertex and electro-hydraulic servo pressure by insertion
The T-slot of power machine lower surface corresponding position connect electro-hydraulic servo press machine with three axis loading chambers (for lifting, adjusting the load of three axis
Room)；
The high-speed camera is fixed on the side of electro-hydraulic servo press machine with tripod, and passes through conducting wire and computer phase
It connects.
Preferably, the diameter of the mutually matched spherical surface of inner panel and outside plate of the load plate
In formula: L is the side length (mm) of load plate.
The method that above-mentioned large scale true triaxial hydraulic fracturing simulation test device carries out true triaxial hydraulic fracturing simulation test,
The following steps are included:
Step 1: the production of sample and loading
Sample is made according to the design size of sample, pre-buried fracturing fluid feed-line, is used in combination at the simulation wellbore hole of sample
Cement carries out sealing to pre-buried fracturing fluid feed-line and simulation wellbore hole connecting part；The both ends of hoisting wirerope are inserted respectively
In the lower surface of electro-hydraulic servo press machine and the T-slot at three four angles of axis loading chamber ends, connects three axis loading chambers and electro-hydraulic watch
Take press machine；Electro-hydraulic servo press machine is risen, slings three axis loading chambers using hoisting wirerope；Start transfer cart driving electricity
Machine proceeds to loading chamber transfer cart below three axis loading chambers；Again decline electro-hydraulic servo press machine, three axis loading chambers are fallen on
On loading chamber transfer cart；Unload hoisting wirerope；Invert transfer cart driving motor, loading chamber transfer cart retreats, and three axis are added
Room is carried to remove；Sample is placed on lower bolster, upper padding plate is placed in the top surface of sample, places the 5th in the top of upper padding plate and add
Support plate；Then start transfer cart driving motor, drive load room transfer cart moves ahead, and three axis loading chambers are sent to electro-hydraulic servo pressure
The intermediate position of machine；Hoisting wirerope is installed, increase electro-hydraulic servo press machine, three axis loading chambers is sling, starts transfer cart
Driving motor reversion, drive load room transfer cart retreat, loading chamber transfer cart are recalled；Electro-hydraulic servo press machine is finally fallen,
Fall in three axis loading chambers steadily on the pedestal of electro-hydraulic servo press machine；Hoisting wirerope is removed, will be embedded in simulation wellbore hole
Fracturing fluid intake pipeline stretched out from upper padding plate, with hydraulic servo pump pressure module in the second needle valve connect；It installs infrared
Camera and acoustic emission probe；
According to experimental design scheme, sample is arranged on computers, and in tri- directions X, Y, Z, (X, Y are to hang down with sample facade
Histogram to, Z be and top surface vertical direction) on load load parameter；Start true triaxial loading system, by adding for computer installation
It carries parameter to load sample using the loading method for synchronizing point gradient, keeps pressing by servo-system when reaching goal pressure
Power is constant；
Step 2: hydraulic fracturing simulation test is carried out
Configured fracturing fluid is fitted into the fracturing fluid holding vessel of hydraulic servo pump pressure module, starting electric pressuring pump,
Fracturing fluid is transported in intermediate receptacle；
Specimen coding is inputted on computers, and setting pressure break liquid pump infuses discharge capacity, turn-on data recorder；Open infrared monitoring
The inner case of three axis loading chamber of host supervision；It opens full information acoustic emission analysis instrument host and acquires acoustic emission signal；Finally open
Pump-up system is opened, device enters pressure break mode；Moment falls one after pump pressure-time graph that machine to be calculated is shown reaches peak value
Curve is stable over time after the section time sees that pressure break is arranged at sample bottom near some pressure value, on infrared monitoring host
When hydrorrhea goes out, hydraulic fracturing physical analogy terminates；
Step 3: unloading sample
After hydraulic fracturing physical analogy, full information acoustic emission analysis instrument is closed, stops acoustic emission signal acquisition；It closes
Infrared monitoring host stops the acquisition of vision signal；Hydraulic servo pump-up system is closed, the second needle valve is opened, disconnects pressure break
The connection of liquid intake pipeline and hydraulic servo pump pressure module；Simulated ground stress is unloaded, load plate is retracted；Fracturing fluid outlet is opened,
It collects and handles after the completion of test remaining fracturing fluid in three axis loading chambers；Electro-hydraulic servo press machine is risen, hoisting steel is utilized
Cord slings three axis loading chambers, starts transfer cart driving motor, proceeds to loading chamber transfer cart below three axis loading chambers, then make
The decline of electro-hydraulic servo press machine, three axis loading chambers are fallen on loading chamber transfer cart, hoisting wirerope is unloaded, drives transfer cart
Motor reversal, loading chamber transfer cart retreat, and three axis loading chambers are removed, using boom hoisting and wirerope by sample together with underlay
Plate is hung out from three axis loading chambers together, terminates test；
Step 4: data processing and inversion
After the test, specimen surface hydraulic fracture form and tendency are observed, six faces of sample are carried out with slr camera
Shooting record；Then along specimen surface hydraulic fracture by sample cutting, in conjunction with Acoustic Emission location result and pump pressure-time graph point
Bleed power fracture pattern analyzes the crack initiation of hydraulic fracture and extends mechanism and different load parameters for hydraulic fracture form and expansion
The influence of exhibition.
In the method for above-mentioned hydraulic fracturing simulation test, the sample (7) in step 1 is analog simulation sample or natural original
Rock sample；Analog simulation sample is to add gauge water to be made into concrete using cement, lime, gypsum and additive as raw material, utilize mould
Tool, which pours, to be made, and simulation wellbore hole is reserved in casting process；Natural protolith sample is the large rock mass by collection in worksite by design
Size is cut into, and the centre drill in a face of natural protolith sample takes simulation wellbore hole.
In the utility model, being designed by given formula load plate inner panel and the mutually matched spherical surface of outside plate is to be based on
Following tests result:
When inner panel and the mutually matched spherical diameter of outside plateWhen, the transmission effect of inner panel and outside plate power is best, i.e.,
Reach sample plane deflection 5 ° (general sample plane deflection does not exceed 5 °), sample load will not occur partially for load plate
The accuracy of the heart, test result will not be impacted；When spherical diameter is less thanWhen, load plate loads sample including meeting
It forms stress at plate and outside plate sphere-contact to concentrate, the transmitting of power is uneven, and sample plane slightly deflection, load will occur partially
The heart makes the accuracy of test result be affected；Conversely, when spherical diameter is greater thanFor the sample of surface deflection,
Load plate need to increase displacement, and load plate and specimen surface generate frictional force, also result in sample stress bias, make test result
Accuracy be affected.
When carrying out uniaxial hydraulic fracturing physical simulation experiment using the present apparatus, save three axis loading chambers and horizontal direction plus
Loading system is not required to confining pressure load plate, is only placed directly into sample and lower bolster on the pedestal of electro-hydraulic servo press machine, in sample
Upper padding plate and load plate are placed in top surface, carry out uniaxial loading, while the mould into sample to sample using electro-hydraulic servo press machine
Quasi- pit shaft adds fracturing fluid, opens high-speed camera, shale surface fracture initiation extends situation during hourly observation hydrofracturing.
Compared with existing large scale true triaxial hydraulic fracturing simulation test device, the utility model is had the advantage that
1, the spherical surface that inner panel and the outside plate calculation formula defined by of load plate acquire is formed in utility model device
It cooperates, even if can make sample plane deflection (angle is no more than 5 °), to sample load bias will not occur for load plate, no
Will affect the accuracy of test result, thus solve when carrying out large dimension specimen hydraulic fracturing simulation test to specimen size and
The depth of parallelism requires harsh technical problem, eliminates test specimen irregularly to the shadow of hydraulic fracturing simulation test load load effect
It rings；It solves simultaneously and irregular shale sample is asked with the technology that reduction Acoustic Emission location accuracy is modified in concreting
Topic, improves the reliability of test result.
2, utility model device using infrared monitoring module can three axis loading chamber of real-time monitoring during the test it is interior
Portion's loading conditions provide Real-time Monitoring Data for experiment.
3, three axis loading chambers in utility model device are not fixed with electro-hydraulic servo press machine connect (placement force machine
On pedestal), and it is removed and is sent into from press machine by available loading chamber transfer cart, while can also lift by crane steel wire by press machine
It is sling and is put down from press base by rope, by adjusting the thickness of upper lower bolster and load plate, can meet more size examinations
Sample pressure break condition.
4, utility model device can be not only used for true triaxial hydraulic fracturing simulation test, and can be used for uniaxial hydraulic fracturing mould
Quasi- test, and specimen surface speckle image when uniaxial hydraulic fracturing is tested is acquired with high-speed camera, intuitively observe hydraulic fracturing
Hydraulic fracture dynamic expansion rule when simulation, realizes a tractor serves several purposes.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model hydraulic fracturing simulation test device；
Fig. 2 is large scale true triaxial loading module in Fig. 1, infrared monitoring module, Acoustic Emission location module and speckle observation
The structural schematic diagram of module；
Fig. 3 is the structural schematic diagram of three axis loading chambers in large scale true triaxial loading module in Fig. 1；
Fig. 4 is the top view (arrangement containing infrared camera) of Fig. 3；
Fig. 5 is the outside plate spherical surface dimensional drawing of load plate in Fig. 4；
Fig. 6 is the stereoscopic schematic diagram of upper padding plate in Fig. 3；
Fig. 7 is the schematic view of the mounting position of acoustic emission probe in Fig. 2；
Fig. 8 is the structural schematic diagram of Unload module in Fig. 1；
Fig. 9 is the structural schematic diagram that hydraulic servo is pumped module in Fig. 1.
Symbol description in figure: 1- large scale true triaxial loading module；11- true triaxial loads servo system control case；12- electricity
Liquid servo-pressing machine；Tri- axis loading chamber of 13-；131- load plate；1311- inner panel；1312 outside plates；132- upper padding plate；1321- (on
In backing plate) fracturing fluid feed-line channel；133- oil circuit；The outlet of 134- fracturing fluid；135- lower bolster；136- connection bolt；
137- loading chamber pedestal；The flat jack of 14- first；The flat jack of 15- second；2- hydraulic servo is pumped module；21- air
Compressor；22- snorkel；23- flow pipe；24- gas-liquid booster pump；The first water storage container of 25-；26- high pressure line；27- four-way
Valve；28- pressure sensor；29- data logger；The first needle valve of 210-；The second water storage container of 211-；212- intermediate receptacle；
213- triple valve；The second needle valve of 214-；215- third needle valve；216- fracturing fluid returnable；The 4th needle valve of 217-；
218- fracturing fluid holding vessel；219- electric pressuring pump；220- controls electronic box；221- fracturing fluid feed-line；3- Acoustic Emission location
Module；31- full information sound emission recorder host；32- acoustic emission signal amplifier；33- acoustic emission probe；4- infrared monitoring mould
Block；41- infrared monitoring host；42- infrared camera；5- sample handling module；51- transfer cart driving motor；52- transfer cart passes
Moving axis；53- transfer cart track；54- transfer cart limiting device；55- fixing bolt；56- loading chamber transfer cart；57- lifts by crane steel wire
Rope；58-T shape slot；6- high-speed camera；7- sample；8- simulation wellbore hole.
Specific embodiment
The utility model is described further below in conjunction with drawings and examples.
As depicted in figs. 1 and 2, the present embodiment large scale true triaxial hydraulic fracturing simulation test device, including it is used for big ruler
Very little square sample 7 apply triaxial load with the large scale true triaxial loading module 1 of simulated ground stress, for defeated inside sample
The hydraulic servo of high pressure fracture liquid is sent to be pumped module 2, for hydraulic fracture propagation law in real-time monitoring hydraulic fracturing process
Acoustic Emission location module 3, is used for three axis of real-time monitoring during test at the sample handling module 5 for loading and unloading for sample
The infrared monitoring module 4 of 13 inner case of loading chamber, the high-speed camera 6 for carrying out uniaxial hydraulic fracturing simulation test and calculating
Machine.
In conjunction with Fig. 3 to Fig. 6, the large scale true triaxial loading module 1 includes electro-hydraulic servo press machine 12, three axis loading chambers
13, the first flat jack 14 to sample pressure and the second flat jack 15 and true triaxial load servo system control case
11；Wherein three axis loading chamber tops are fixed together by connecting bolt 136 with loading chamber pedestal 137；Have in three axis loading chambers
Upper padding plate 132, lower bolster 135 and five pieces of load plates 131；Load plate is by passing through the mutually matched inner panel 1311 of spherical surface and outside plate
1312 compositions, the spherical surface of inner panel are spirogyrate, and the spherical surface of outside plate is concave shape；There are the four of four pieces of corresponding samples in five pieces of load plates
A facade is placed in four edge of three axis loading chambers, wherein adjacent two pieces of outside plate respectively with the described first flat jack 14 and
Second flat jack 15 connects, and the first flat jack and the second flat jack pass through oil circuit 133 respectively and add with true triaxial
Servo system control case 11 is carried to connect；Another piece of load plate is located at the top of the upper padding plate, outside plate and electro-hydraulic servo pressure
Machine connects；The upper padding plate has square fracturing fluid feed-line channel 1321；There is lifting at four angles of the lower bolster
With circular hole, there is fracturing fluid to export 134 on lower bolster and three axis loading chamber pedestals；
Square sample side length of the present embodiment for test is 400mm, as shown in figure 5, being square the side of load plate
Long L is 20mm smaller than sample side length, is 380mm, and spherical surface basal diameter r2 is the 90% of load plate side length, is 342mm, inner panel and outer
The mutually matched spherical diameter r1 of plate is according to formulaAcquiring spherical diameter is 850mm.
As shown in figure 9, the hydraulic servo pump pressure module 2 includes air compressor 21, gas-liquid booster pump 24, pressure sensing
Device 28, data logger 29, intermediate receptacle 212, fracturing fluid storage tank 218, electric pressuring pump 219, control electronic box 220, first
Needle valve 210, the second needle valve 214, third needle valve 215, the 4th needle valve 217, triple valve 213, four-way valve 27, first store up
Water container 25, fracturing fluid returnable 216, high pressure line 26, fracturing fluid feed-line 221, send water at second water storage container 211
Pipe 23 and snorkel 22；One end entrance of the gas-liquid booster pump 24 connects air compressor 21, air pressure by snorkel 22
Contracting machine 21 connects control electronic box 220 by electric wire, and another end entrance of gas-liquid booster pump 24 passes through first storage of the connection of flow pipe 23
Water container 25, the outlet of gas-liquid booster pump connect the first end of four-way valve 27, the second end of four-way valve 27 by high pressure line 26
Pressure sensor 28 is connected by high pressure line, pressure sensor 28 is connected by conducting wire with data logger 29, data record
Instrument 29 is connected by conducting wire with computer, and the third end of four-way valve 27 passes through high pressure line and the first needle valve 210 and the second storage
Water container 211 connects, and the 4th end of four-way valve 27 connects the entrance of intermediate receptacle 212 by high pressure line, intermediate receptacle 212
First end of the outlet by high pressure line connection triple valve 213, second end the second needle valve 214 of connection of triple valve 213, second
The other end of needle valve is connected with the simulation wellbore hole 1311 in sample 7 by fracturing fluid feed-line 221, and the of triple valve 213
Three ends are connected by high pressure line and the 4th needle valve 217 with the outlet of fracturing fluid holding vessel 218, fracturing fluid holding vessel 218
Entrance is connected by high pressure line with electric pressuring pump 219, and electric pressuring pump 219 is connected by conducting wire with control electronic box 220, is controlled
Electronic box processed connects with computer；One end of third needle valve 215 connects fracturing fluid outlet 134 by pipeline, and the other end passes through height
Pressure pipeline connects with fracturing fluid returnable 216；
In conjunction with Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 7, the Acoustic Emission location module 3 includes full information acoustic emission analysis instrument master
Machine 31, acoustic emission signal amplifier 32 and acoustic emission probe 33；Acoustic emission probe is respectively arranged in the apex angle of four facades of sample
Place, and connected by conducting wire with acoustic emission signal amplifier 32, acoustic emission signal amplifier 32 is sent out by conducting wire and full information sound
It penetrates analyzer host 31 to connect, full information acoustic emission analysis instrument host 31 is connected by conducting wire with computer；
In conjunction with Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the infrared monitoring module 4 includes infrared monitoring host 41, infrared camera
42；Infrared camera is installed on three axis loading chamber, four, 13 top vertex, and connects with infrared monitoring host 41, infrared
Monitoring host is connected by conducting wire with computer；
In conjunction with Fig. 8, Fig. 3 and Fig. 4, the sample handling module 5 includes transfer cart driving motor 51, loading chamber transfer cart
56, transfer cart track 53, transfer cart transmission shaft 52 and hoisting wirerope 57；The pedestal of transfer cart track and electro-hydraulic servo press machine
It is highly identical, and be fixed on the pedestal of electro-hydraulic servo press machine with fixing bolt 55；Transfer cart driving motor 51 passes through described
52 drive load room transfer cart of loading chamber transfer cart transmission shaft advances and and retreats, transfer cart driving motor and control electronic box 220
Connection；There is transfer cart limiting device 54 in the rear end of transfer cart track；The hoisting wirerope upper and lower ends have T steel, T shape respectively
Steel can be made by the T-slot 58 that insertion is provided with three axis loading chambers, four vertex and electro-hydraulic servo press machine lower surface corresponding position
Electro-hydraulic servo press machine is connect with three axis loading chambers, for slinging three axis loading chambers from electro-hydraulic servo press base 137
With fall；
As depicted in figs. 1 and 2, the high-speed camera 6 is fixed on the side of electro-hydraulic servo press machine 12 with tripod, and
Connected by conducting wire with computer.
Sample used in the present embodiment is natural protolith sample, is cut by the bulk page rock of collection in worksite by side length L for 400mm
Cut and be made, the centre drill in a face of natural protolith sample takes simulation wellbore hole, and pre-buried fracturing fluid feed-line, with cement and
Water, which does not leak, carries out sealing to pre-buried fracturing fluid feed-line and simulation wellbore hole connecting part in the mixing of 1:1 ratio.
It should be noted that using the serial numbers such as " first ", " second " is only statement side in the description of above-described embodiment
It just, is not its relative importance of indication or suggestion.
True triaxial hydraulic fracturing simulation test and uniaxial waterpower pressure are carried out with the embodiment hydraulic fracturing simulation test device
The method for splitting simulation test is same as above, and is repeated no more.
Claims (2)
1. a kind of large scale true triaxial hydraulic fracturing simulation test device, including for applying three axis to large scale square sample
Load with the large scale true triaxial loading module (1) of simulated ground stress, for the waterpower to sample delivered inside high pressure fracture liquid
Servopump die block (2), for the Acoustic Emission location module (3) of crack propagation law in real-time monitoring hydraulic fracturing process, use
In sample handling module (5) and computer that sample is loaded and unloaded；It is characterized in that, further including for real-time during testing
It monitors the infrared monitoring module (4) of three axis loading chamber (13) inner cases and is recorded for uniaxial loading hydraulic fracturing simulation test
The high-speed camera (6) of hydraulic fracture extension situation；
The large scale true triaxial loading module (1) includes electro-hydraulic servo press machine (12), three axis loading chambers (13), applies to sample
The the first flat jack (14) and the second flat jack (15) of pressure and true triaxial load servo system control case (11)；Wherein
There are upper padding plate (132), lower bolster (135) and five pieces of load plates (131) in three axis loading chambers；Every piece of load plate is by passing through spherical surface phase
Inner panel (1311) and outside plate (1312) composition mutually cooperated, the spherical surface of inner panel are spirogyrate, and the spherical surface of outside plate is concave shape, spherical surface
The diameter r2 of bottom surface is the 90% of load plate side length L；There are four facades of four pieces of corresponding samples to be placed in three axis in five pieces of load plates
Four edge of loading chamber, wherein two pieces of adjacent outside plates respectively with the described first flat jack and the second flat jack phase
It connects；Another piece of load plate is located at the top of the upper padding plate, and outside plate connects with electro-hydraulic servo press machine；The upper padding plate has
Square fracturing fluid feed-line channel (1321)；There are lifting circular hole, three axis loading chamber bottoms at four angles of the lower bolster
There is fracturing fluid to export (134) on seat (137)；
Hydraulic servo pump pressure module (2) include air compressor (21), gas-liquid booster pump (24), pressure sensor (28),
Data logger (29), intermediate receptacle (212), fracturing fluid storage tank (218), electric pressuring pump (219), control electronic box (220),
First needle valve (210), the second needle valve (214), third needle valve (215), the 4th needle valve (217), triple valve (213),
Four-way valve (27), the first water storage container (25), the second water storage container (211), fracturing fluid returnable (216), high pressure line
(26), fracturing fluid feed-line (221), flow pipe (23) and snorkel (22)；One end entrance of the gas-liquid booster pump passes through
Snorkel connects air compressor, and air compressor connects control electronic box by conducting wire, and another end entrance of gas-liquid booster pump is logical
It crosses flow pipe and connects the first water storage container, the outlet of gas-liquid booster pump connects the first end of four-way valve, four-way by high pressure line
The second end of valve connects pressure sensor by high pressure line, and pressure sensor is connected by conducting wire with data logger, data
Recorder is connected by conducting wire with computer, and the third end of four-way valve is held by high pressure line and the first needle valve and the second water storage
Device connects, and the 4th end of four-way valve connects the entrance of intermediate receptacle by high pressure line, and the outlet of intermediate receptacle passes through high-voltage tube
Line connects the first end of triple valve, and the second end of triple valve connects the second needle valve, and the other end of the second needle valve passes through pressure break
Liquid feed-line connects with the simulation wellbore hole (8) in sample (7), and the third end of triple valve passes through high pressure line and the 4th needle valve
Connect with the outlet of fracturing fluid holding vessel, the entrance of fracturing fluid holding vessel is connected by high pressure line with electric pressuring pump, electronic
Force (forcing) pump is connected by conducting wire with control electronic box, and control electronic box connects with computer；One end of third needle valve is connected by pipeline
The fracturing fluid outlet (134) is connect, the other end is connected by high pressure line with fracturing fluid returnable；
The Acoustic Emission location module (3) includes full information acoustic emission analysis instrument host (31), acoustic emission signal amplifier (32)
With acoustic emission probe (33)；Acoustic emission probe is respectively arranged in the vertex of four facades of sample, and passes through conducting wire and sound emission
Signal amplifier connects, and acoustic emission signal amplifier is connected by conducting wire with full information acoustic emission analysis instrument host, full information sound
Emission analysis instrument host is connected by conducting wire with computer；
The infrared monitoring module (4) includes infrared monitoring host (41), infrared camera (42)；Infrared camera is installed on institute
Three axis loading chamber (13) four, top vertex are stated, and are connected with infrared monitoring host, infrared monitoring host passes through conducting wire and meter
Calculation machine connects；
The sample handling module (5) includes transfer cart driving motor (51), loading chamber transfer cart (56), transfer cart track
(53), transfer cart transmission shaft (52) and hoisting wirerope (57)；The substructure height phase of transfer cart track and electro-hydraulic servo press machine
Together, and with fixing bolt (55) it is fixed on the pedestal of electro-hydraulic servo press machine；Transfer cart driving motor passes through the transfer cart
Transmission shaft drive load room transfer cart moves forward and backward, and transfer cart driving motor is connect with control electronic box (220)；Transfer cart track
Rear end have transfer cart limiting device (54)；Hoisting wirerope (57) upper and lower ends have T steel respectively, and T steel can pass through
Insertion, which is provided with three axis loading chambers, four vertex and the T-slot (58) of electro-hydraulic servo press machine lower surface corresponding position, makes electro-hydraulic watch
Press machine is taken to connect with three axis loading chambers；
The high-speed camera (6) is fixed on the side of electro-hydraulic servo press machine (12) with tripod, and by conducting wire and calculates
Machine connects.
2. large scale true triaxial hydraulic fracturing simulation test device according to claim 1, which is characterized in that the load plate
Inner panel and the mutually matched spherical surface of outside plate diameter
In formula: L is the side length of load plate.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109540688A (en) * | 2019-01-10 | 2019-03-29 | 辽宁工程技术大学 | A kind of large scale true triaxial hydraulic fracturing simulation test device and test method |
| CN111141599A (en) * | 2020-03-09 | 2020-05-12 | 山东科技大学 | True triaxial hydraulic fracturing test method capable of adjusting fracturing hole direction |
| CN111472741A (en) * | 2020-05-25 | 2020-07-31 | 山东大学 | Experimental method for researching rock fracturing multi-crack propagation rule by using volume expansion material |
| CN111896384A (en) * | 2020-07-13 | 2020-11-06 | 河海大学 | Hydraulic fracture test device and test method for concrete member under triaxial stress |
| CN111894550A (en) * | 2020-06-23 | 2020-11-06 | 中国矿业大学 | Simulation test system and method for fracturing of upward drilling hole low-temperature fluid |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109540688A (en) * | 2019-01-10 | 2019-03-29 | 辽宁工程技术大学 | A kind of large scale true triaxial hydraulic fracturing simulation test device and test method |
| CN109540688B (en) * | 2019-01-10 | 2023-10-24 | 辽宁工程技术大学 | Large-size true triaxial hydraulic fracturing simulation test device and test method |
| CN111141599A (en) * | 2020-03-09 | 2020-05-12 | 山东科技大学 | True triaxial hydraulic fracturing test method capable of adjusting fracturing hole direction |
| CN111472741A (en) * | 2020-05-25 | 2020-07-31 | 山东大学 | Experimental method for researching rock fracturing multi-crack propagation rule by using volume expansion material |
| CN111894550A (en) * | 2020-06-23 | 2020-11-06 | 中国矿业大学 | Simulation test system and method for fracturing of upward drilling hole low-temperature fluid |
| CN111894550B (en) * | 2020-06-23 | 2022-05-17 | 中国矿业大学 | Simulation test system and method for fracturing of upward drilling hole low-temperature fluid |
| CN111896384A (en) * | 2020-07-13 | 2020-11-06 | 河海大学 | Hydraulic fracture test device and test method for concrete member under triaxial stress |
| 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 |
| CN115078121A (en) * | 2022-08-23 | 2022-09-20 | 太原理工大学 | Indirect visual rock multi-cluster fracturing indoor test device and method |
| CN115078121B (en) * | 2022-08-23 | 2022-12-09 | 太原理工大学 | Indirect visual rock multi-cluster fracturing indoor test device and method |
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