CN107462510B - Test the device for becoming under triaxial stress and stitching high bifurcated fracture condudtiviy - Google Patents
Test the device for becoming under triaxial stress and stitching high bifurcated fracture condudtiviy Download PDFInfo
- Publication number
- CN107462510B CN107462510B CN201710726022.XA CN201710726022A CN107462510B CN 107462510 B CN107462510 B CN 107462510B CN 201710726022 A CN201710726022 A CN 201710726022A CN 107462510 B CN107462510 B CN 107462510B
- Authority
- CN
- China
- Prior art keywords
- test
- loading device
- rock sample
- pressure loading
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 122
- 239000011435 rock Substances 0.000 claims abstract description 70
- 238000007789 sealing Methods 0.000 claims abstract description 66
- 239000012530 fluid Substances 0.000 claims abstract description 40
- 239000000523 sample Substances 0.000 claims description 90
- 239000007788 liquid Substances 0.000 claims description 79
- 230000037361 pathway Effects 0.000 claims description 30
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 238000002474 experimental method Methods 0.000 claims description 9
- 125000006850 spacer group Chemical group 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 6
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 4
- 230000003750 conditioning effect Effects 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000010985 leather Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 15
- 238000011156 evaluation Methods 0.000 abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 238000001914 filtration Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 210000003746 feather Anatomy 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- -1 shale Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention relates to the device for stitching high bifurcated fracture condudtiviy is become under test triaxial stress, it includes diversion chamber, burden pressure loading device, sealing pressure loading device, seam tail pressure loading device；Diversion chamber, lower part, inner cavity is equipped with angle bottom plate, test rock sample is placed on angle bottom plate, test rock sample is the trapezoidal rock beam in the multiple bifurcated crack gradually changed containing seamed height, and burden pressure loading device and angle bottom plate cooperate the load that high test rock sample burden pressure is met to change；Clossing pressure loading blocks are mounted on the two sides of water conservancy diversion chamber, apply clossing pressure to test rock sample both ends；Sealing pressure apparatus and seam tail pressure loading device are mounted on the both ends in fracture extension direction in test rock sample, implement the pressure for applying fracture extension direction to test rock sample；Burden pressure loading device has slit width measuring device.The present invention can be realized flow conductivity measurement and evaluation of the fracturing fluid in the high plate crack gradually changed of seam, the high single bifurcated of constant seam and the seam multiple bifurcated crack of High variation.
Description
Technical field
The present invention relates to become the device for stitching high bifurcated fracture condudtiviy under test triaxial stress, and in particular to three axis of test
Become the device for stitching high bifurcated fracture condudtiviy under stress.
Background technique
Fracture condudtiviy is that oil field development carries out FRACTURING DESIGN and evaluates the important parameter of fracturing effect.It is conventional at present
Flow conductivity test method be by under the conditions of the certain clossing pressure of indoor experimental apparatus test evaluation, temperature, sanding concentration etc.,
Guide performance of the fracturing fluid in plate crack, is calculated under certain clossing pressure using Darcy formula, fracture width, support
The flow conductivity evaluation in crack is completed in the influence of agent parameter and fracturing fluid type to flow conductivity.
The limitation of conventional flow conductivity test method be can only mini-frac liquid under single clossing pressure, constant seam
Flow conductivity in high single plate crack.And the unconventional reservoirs such as tight sand, shale, coal petrography are passing through large-scale body
After product fracturing reform, the multi-branch complex crack with bifurcated is often formed inside reservoir, increases the infiltration of reservoir fluid
Flow area and flow conductivity.And the true crack in reservoir is often to be gradually reduced by triaxial stress effect, seam height, this
Cause conventional flow conductivity test result and actual conditions there are huge deviation, is difficult accurately to be applied to live pressing crack construction
After design and pressure in effect assessment.For the reliability for improving unconventional storage fracturing design program and evaluation of Fracturing Effect on Compact Sandstone, have
The high bifurcated fracture condudtiviy of non-perseverance under necessity acts on three axis crustal stress carries out test and evaluation.
Summary of the invention
The object of the present invention is to provide become the device for stitching high bifurcated fracture condudtiviy, this test under test triaxial stress
Become the device for stitching high bifurcated fracture condudtiviy under triaxial stress for solving conventional flow conductivity test result and actual conditions
There are problems that huge deviation.
The technical solution adopted by the present invention to solve the technical problems is: becoming the high bifurcated of seam under this test triaxial stress and splits
The device of seam flow conductivity includes diversion chamber, burden pressure loading device, sealing pressure loading device, seam tail pressure-loaded dress
It sets；Diversion chamber, lower part, inner cavity is equipped with angle bottom plate, and angle bottom plate connects slope conditioning, and test rock sample is placed in angle bottom plate
On, test rock sample is the trapezoidal rock beam in the multiple bifurcated crack gradually changed containing seamed height, burden pressure loading device and angle
The load that high test rock sample burden pressure is met to change is realized in bottom plate cooperation；Clossing pressure loading blocks are mounted on the two of water conservancy diversion chamber
Side applies clossing pressure to test pattern both ends；Sealing pressure apparatus and seam tail pressure loading device are mounted in test rock sample
The both ends in fracture extension direction, the two cooperation apply the pressure in fracture extension direction to test rock sample；Sealing pressure loading device
On be provided with a plurality of feed pathway, feed pathway is connect with the man-made fracture sealing of test rock sample, and angle bottom plate includes several mistakes
Filter pocket, several liquid outlet grooves, seam tail pressure loading device are provided with a plurality of liquid outlet channel, and liquid outlet groove and liquid outlet channel, which correspond, to be connected
It connects, liquid outlet channel connecting test pipe group, is provided with apparatus for metering fluids and fluid pressure meter in testing tube group；Burden pressure load
Device has slit width measuring device, auxiliary block, there is probe sliding rail, guide groove in auxiliary block, and guide groove is inserted into slit width probe one end
Interior, the slit width probe other end is mounted in probe sliding rail, and is connect with the slide rail type displacement sensor of slit width measuring device.
Diversion chamber's upper port covers pressure loading device to install having a size of 200mm ' 200mm in above scheme；Water conservancy diversion
Room feed liquor side is provided with the long square opening of 90mm*200mm, and to install sealing pressure loading device, liquid side is provided with 30 ' out
200mm long square opening, to install seam tail pressure loading device；Diversion chamber two sides are provided with long side 90mm, short side 30mm, high
The trapezoidal mouth of 200mm, to connect clossing pressure loading blocks.
Angle bottom plate is to pass through fixed stay bolt by 20 base pieces successively to assemble in above scheme；Every piece of base piece
There are the liquid outlet groove and the first lautertuns in two sides, and the angle bottom plate that 20 base pieces are composed includes 19 ' 19 and goes out altogether
Liquid bath and 19 ' 19 the first lautertuns；Angle bottom plate and diversion chamber are rotatablely connected by axis, on diversion chamber's pedestal there are three installations
Liftable jacking system, jacking system upper end withstand on angle bottom plate in the following, under the support of jacking system, and angle bottom plate can
The gradient is adjusted, to adapt to test rock sample of different shapes；Diversion chamber upper end is equipped with angle-regulating block, angle-regulating block and water conservancy diversion
Room is by axis connection, for adjusting the load angle of burden pressure loading device.
The maximum seam height and most crack that rock sample is tested in above scheme are at high proportion 1:1 ~ 3:1.
Burden pressure loading device further includes deflecting loading blocks in above scheme, and deflecting loading blocks and auxiliary block pass through deflecting
Axis connection, deflecting loading blocks adjust load angle by turning axis according to the shape of test rock sample；The side of auxiliary block and slit width
Measuring device connects, and has 19 probe sliding rails and 19 ' 19 guide grooves, before experiment, needing to measure slit width position in auxiliary block
Guide groove in be inserted into slit width probe, the slit width probe other end is mounted in probe sliding rail, and the sliding rail with slit width measuring device
The connection of formula displacement sensor, the changes of slit length of man-made fracture drive slit width probe to slide in probe sliding rail, another with slit width probe
The slide rail type displacement sensor of one end connection records changes of slit length.
Sealing pressure loading device includes 18 feed pathways in above scheme, and feed pathway one end connects liquid feed valve, into
Liquid valve is connect with pressure break fluid supply pump, feed pathway by the load channel of its other end loading end with test rock sample and contact and defeated
Fracturing fluid is sent, loading end protrudes outward, and the feed pathway of loading end is load channel；Sealing pressure loading device both ends are equipped with
Special operations block, can according to man-made fracture sealing position, finely tune sealing pressure loading device on feed pathway position, make into
It is accurately docked with sealing in liquid channel；There are the first bearing plate, the first bearing plate and transverse pressure machine in sealing pressure loading device rear portion
Connection.
The elemental height of sealing pressure loading device loading end is 30mm in above scheme, contains 6 load channels, works as survey
When trying test sample of the sealing height greater than 30mm, loading end respectively installs the auxiliary spacer that multiple height are 5mm, auxiliary mat up and down
Also there is load channel inside piece；Before test, unwanted feed pathway is sealed with sealing bolt, with manually splitting for test rock sample
It stitches and sealing rubber pad is installed at the connected load channel of sealing.
It stitches tail pressure loading device in above scheme to be successively composed of 10 loading blocks, loading blocks are connected by fixing bolt
It connects, and is installed on the second bearing plate, there is arc lautertuns and liquid outlet channel between every two loading blocks, liquid outlet channel one end connects
It is connected to liquid valve, liquid valve is connect with apparatus for metering fluids and fluid pressure meter.Arc filter, resistance are installed in arc lautertuns
Only proppant enters liquid outlet channel, and arc, which filters, installs rubber gasket before experiment at notch.
It tests after the completion of the man-made fracture preparation on rock sample, is swathed with seal rubber leather sheath, and use hot wind in above scheme
Machine heating is wrapped, to guarantee leakproofness.
The invention has the following advantages:
1, present invention test rock sample is trapezoid block, can be cut into seam High variation, man-made fracture with branch feathers,
Device through the invention simulates water conservancy diversion state of the condition of triaxial stress fracturing liquid in man-made fracture, can be realized fracturing fluid
In the high plate crack gradually changed of seam, the high single bifurcated of constant seam or multiple bifurcated crack and the seam multiple bifurcated crack of High variation
In flow conductivity measurement and evaluation.
2, the angle bottom plate of adjustable contact angle is installed in the diversion chamber in the present invention, burden pressure loading device
Load angle can be adjusted according to specimen shape, and it is high that the cooperation of both angle bottom plate and burden pressure loading device can be realized any seam
The vertical stress load of the test rock sample of change rate.
3, include 19 ' 19 liquid outlet channels (lautertuns+liquid outlet groove) on the angle bottom plate in the present invention, test flow conductivity
When the liquid outlet channel of predicted position can be connected with the testing tube group of diversion chamber according to experimental program, testing tube group and fluid metering
Device is connected with fluid pressure meter, can be realized the measurement of any crack section flow in multiple bifurcated crack and pressure, pressure difference.
4, burden pressure loading device of the present invention includes deflecting loading blocks, auxiliary block and slit width measuring device, auxiliary block with
Slit width measuring device connects, and has 19 probe sliding rails and 19 ' 19 guide grooves in auxiliary block, can be split according to experimental program in master
Slit width probe is installed in seam or bifurcated crack two sides, and slit width probe is connect with displacement sensor group, and it is any to can be realized test rock sample
The measurement of position slit width and changes of slit length.
It 5, include a plurality of feed pathway inside the sealing pressure loading device in the present invention, feed pathway one end connects feed liquor
Valve, one end connects man-made fracture sealing, while guarantee is evenly supplied fracturing fluid from top to bottom, realizes fracture extension directional pressure
Load, can be realized stress loading and the progress of feed flow while in test；There are two auxiliary for sealing pressure loading device two sides
Movable block can be realized feed pathway and dock with the accurate of man-made fracture.
6, the seam tail pressure loading device in the present invention can be realized pressure-loaded and out liquid measurement while progress, simultaneously
Seam side pressure force loading device is made of 10 independent loads blocks, convenient for the laying and cleaning of liquid outlet channel inner support agent.
7, the test rock sample in the present invention can equally be prepared to the rock sample containing permanent high plate crack, carry out conventional flat
The measurement and evaluation of the flow conductivity of plank split.
Detailed description of the invention
Fig. 1 is that test rock sample of the invention prepares schematic diagram；
Fig. 2 is overall structure figure of the invention；
Fig. 3 is diversion chamber and angle floor structure figure in the present invention；
Fig. 4 is 3 side view；
Fig. 5 is angle floor structure figure in the present invention；
Fig. 6 is burden pressure loading device structure chart of the invention；
Fig. 7 is slit width measuring device and guide groove relation schematic diagram；
Fig. 8 is the top view of Fig. 7；
Fig. 9 is the relational graph of man-made fracture Yu slide rail type displacement sensor；
Figure 10 is sealing pressure loading device structure chart of the invention；
Figure 11 is sealing pressure loading device half-section diagram of the invention；
Seam tail pressure loading device structure chart Figure 12 of the invention；
Figure 13 is bifurcated fracture condudtiviy testing scheme schematic diagram of the invention.
In figure: 1. diversion chamber, 2. burden pressure loading device, 3. sealing pressure loading device 4. stitches tail pressure-loaded
5. clossing pressure loading blocks 6. of device test 9. liquid valve group of rock sample, 10. angle bottom plate, 11. diversion chamber's pedestal
12. the fixed stay bolt 17. of 13. testing tube group of angle-regulating block, 14. liquid outlet groove, 15. first lautertuns 16. pushes up
The displacement of 21. slit width measuring device of lifting device 18. deflecting loading blocks, 19. auxiliary block, 20. turning axis, 22. slide rail type passes
The sealing of 26. feed pathway of sensor 23. probe sliding rail, 24. guide groove, 25. slit width probe, 27. auxiliary spacer 28.
29. sealing bolt of rubber pad, 30. 31. first bearing plate of special operations block, 32. liquid feed valve, 33. arc lautertuns
34. 35. 36. second bearing plate of fixing bolt, 37. rubber gasket of liquid outlet channel, 38. liquid valve 39. is manually split
Seam.
Specific embodiment
The present invention will be further described below with reference to the drawings:
In conjunction with shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11, Figure 12, this test three
Become rock rock sample used in the device to test of the high bifurcated fracture condudtiviy of seam under axial stress to be prepared to gradually change containing seamed height
Multiple bifurcated crack trapezoidal rock beam, be placed in the diversion chamber 1 that can load triaxial pressure, simulation is close to true crustal stress
Under the conditions of mobility status of the fracturing fluid in bifurcated crack and analysis seam high rate of change, bifurcation number, branch fractures it is wide
The influence of the factors fracture flow conductivities such as degree.
Refering to fig. 1, this to become the device for stitching high bifurcated fracture condudtiviy, including diversion chamber under triaxial stress for testing
1, burden pressure loading device 2, sealing pressure loading device 3, seam tail pressure loading device, clossing pressure loading blocks 5；Diversion cavity
Room lower part is equipped with the angle bottom plate 10 of adjustable slope, realizes with the cooperation of burden pressure loading device 2 and meets high test rock sample 6 to change
The load of burden pressure；Clossing pressure loading blocks 5 are mounted on the two sides of water conservancy diversion chamber, apply closure pressure to test 6 both ends of rock sample
Power；Sealing pressure loading device 3 and seam tail pressure loading device 4 be mounted on test rock sample 6 in fracture extension direction both ends, two
Person's cooperation applies the pressure in fracture extension direction to test rock sample 6；Liquid feed valve 32 is provided on sealing pressure loading device 3, with
The connection of pressure break fluid supply pump provides fracturing fluid for man-made fracture 39, and seam tail pressure loading device 4 is provided with liquid valve group 9, and outer
The apparatus for metering fluids in portion is connected with fluid pressure meter, measures fluid pressure and liquid outlet quantity.
Test rock sample 6 requires to be cut into square (seam is high constant) or trapezoid block (seam High variation) according to experimental program,
Test 6 lateral cross-sectional dimension of rock sample is 220mm ' 200mm, and sealing one end is vertical having a size of 30mm ~ 90mm, stitches the vertical ruler in tail one end
Very little is 30mm；Experiment before according to testing scheme, the artificial bifurcated crack of predetermined shape is gone out using diamond fretsaw machine-cut, according to point
Shape is theoretical, and artificial bifurcated crack is only formed by the short joint set of x and y both direction, and this building form on the one hand can be real
The load of normal stress on existing whole crack wall surface, is on the one hand conducive to the analysis of water conservancy diversion data quantitative.
It is provided with the square orifice of 200mm ' 200mm on the upside of diversion chamber 1, covers pressure loading device 2 to install；Diversion chamber 1
Feed liquor side is provided with the long square opening of 90mm*200mm, and to install sealing pressure loading device 3, liquid side is provided with 30 ' 200mm out
Long square opening, to install seam tail pressure loading device 4；1 two sides of diversion chamber are provided with long side 90mm, short side 30mm, the ladder of high 200mm
Shape mouth, to connect clossing pressure loading blocks 5.
It is to pass through fixed stay bolt 16 by 20 base pieces to assemble refering to Fig. 3, Fig. 4, Fig. 5 angle bottom plate 10；Every piece
The angle bottom plate 10 that base piece two sides have described 15,20 base pieces of liquid outlet groove 14 and the first lautertuns to be composed wraps altogether
Fluid need to measured according to 39 path of man-made fracture before experiment by including 19 ' 19 liquid outlet grooves, 14 and 19 ' 19 the first lautertuns 15
Filtering plug is installed in the first lautertuns 15 of pressure and flow position, then the liquid outlet groove 14 for installing filtering plug is passed through pipeline and led
Testing tube group 13 on 1 side wall of flow chamber connects, and testing tube group 13 is connect with external fluid metering device and fluid pressure meter, completes
The measurement of water conservancy diversion data.Remaining is not necessarily to connecting pipeline without the interior installation sealing-plug of the first lautertuns 15 measured.
Angle bottom plate 10 and diversion chamber 1 are rotatablely connected by axis, and there are three liftable tops for installation on diversion chamber's pedestal 11
Lifting device 17,17 upper end of jacking system withstand on angle bottom plate 10 in the following, under the support of jacking system 17, and angle bottom plate 10 can
The gradient is adjusted, to adapt to test rock sample of different shapes；1 upper end of diversion chamber is equipped with angle-regulating block 12, angle-regulating block 12
With diversion chamber 1 by axis connection, for adjusting the load angle of burden pressure loading device 2.
Refering to Fig. 6, Fig. 7, Fig. 8, Fig. 9, burden pressure loading device 2 includes deflecting loading blocks 18, auxiliary block 19 and slit width
The upper end of measuring device 21, deflecting loading blocks 18 is connect with press machine, and lower end is provided with turning axis 20,18 basis of deflecting loading blocks
The shape for testing rock sample 6 adjusts load angle by turning axis 20, can load lateral pressure to trapezoidal test rock sample 6；Slit width
Measuring device 21 is mounted on 19 side of auxiliary block, including 19 slide rail type displacement sensors 22；19 upper surface of auxiliary block includes 19
Probe sliding rail 23, following face include the guide grooves 24 of 19 ' 19 perforation auxiliary blocks 19, and slit width measurement site is determined before experiment
Afterwards, by one end of slit width probe 25 by the measurement site on the insertion test rock sample 6 of guide groove 24, it is sliding that the other end is mounted on probe
In rail 23, and it is connect with slide rail type displacement sensor 22；The variation of slit width causes shifting of the slit width probe 25 in probe sliding rail 23
Dynamic, displacement is measured and is recorded by the slide rail type displacement sensor 22 of slit width measuring device 21.
0, Figure 11 refering to fig. 1 include 18 feed pathways 26,26 upper end of feed pathway inside sealing pressure loading device 3
Liquid feed valve 32 is connected, liquid feed valve 32 is connect with pressure break fluid supply pump, and feed pathway 26 is logical by the load of its other end loading end
Road contacts with test rock sample 6 and conveys fracturing fluid；There is the first bearing plate 31 at 3 rear portion of sealing pressure loading device, with transverse pressure
Machine connection；Respectively there is a special operations block 30 at 3 both ends of sealing pressure loading device, and handle, auxiliary are arranged outside special operations block 30
Gear is set on movable block 30, and handle connection gear rotates gear by hand cranking handle, can be according to 39 sealing of man-made fracture
Position finely tunes the position of feed pathway 26 on sealing pressure loading device 3, docks feed pathway 26 accurately with sealing；Sealing
There is the first bearing plate 31 at 3 rear portion of pressure loading device, and the first bearing plate 31 is connect with transverse pressure machine.Sealing pressure loading device
The elemental height of 3 loading ends is 30mm, contains 6 feed pathways 26, when testing test sample of the sealing height greater than 30mm,
Loading end respectively installs the auxiliary spacer 27 that multiple height are 5mm up and down, also has load channel inside auxiliary spacer 27；Before test,
The unwanted sealing bolt 29 of feed pathway 26 is sealed, the load being connected with 39 sealing of man-made fracture of test rock sample 6 is logical
Sealing rubber pad 28 is installed at road.
Refering to fig. 12, seam tail pressure loading device 4 is composed of 10 loading blocks, is connected and is installed by fixing bolt 35
Onto the second bearing plate 36；Each loading blocks two sides vehicle has arc lautertuns 33 and liquid outlet channel 34, the seam tail pressure being composed
Force loading device 4 includes altogether 9 arc lautertuns 33 and liquid outlet channel 34, is at best able to the final flow rate to 9 branch fractures
It measures；Arc lautertuns 33, liquid outlet channel 34 are connected to liquid valve 38, and liquid valve 38 is hydraulic with apparatus for metering fluids and out
The connection of power meter, multiple liquid valves 38 constitute liquid valve group；Before experiment, arc is installed in the arc lautertuns 33 for needing determination data
Shape filter prevents proppant from entering liquid outlet channel 34, installs rubber gasket 37 with holes at 33 mouthfuls of arc lautertuns, remaining
Rubber gasket 37 not with holes is installed.
The present invention carries out the non-high bifurcated fracture condudtiviy test of perseverance under triaxial stress effect, and specific step is as follows (to scheme
In 1 in fracture pattern and Figure 13 for testing scheme):
1. prepared by rock sample
A, natural sillar is cut into section according to experimental program is bottom edge 60mm, top 30mm, high 200mm, thickness
The trapezoidal test rock sample 6 of 200mm draws multiple bifurcated crack path on test rock sample 6 with marking pen, uses numerical control water cutter
Artificial bifurcated crack is cut by label.
B, the proppant of certain partial size is filled out according to experimental program with certain concentration and is layered on inside artificial bifurcated crack, then
Rock sample 6 will be entirely tested with rubber sleave to wrap up, and uniformly rubber sleave is heated with air-heater, it is shunk and wraps test
Rock sample 6.
C, the rubber sleave of 39 entrance of man-made fracture and exit is cut away, according to requirement of experiment, in the case where testing rock sample 6
Need to measure at surface markers Fluid pressure and flow measurement point position (in attached drawing 1 at circular mark-(J, 19), (J,
14), (G, 8), (L, 8), (N, 4), (D, 2), (H, 2), (L, 1), (P, 1)), and drilled out at measurement point position on rubber sleave
Hole.
D, the upper surface of test rock sample 6 determine slit width measurement point position (fork-shaped mark-(H, 16) in attached drawing 1,
(M, 14), (K, 6), (F, 3), (N, 1)) and drill out the jack of slit width probe 25, depth 3mm.
2. installing rock sample
A, according to the shape and size of test rock sample 6, the height of jacking system 17 is adjusted, angle bottom plate 10 is fixed to pre-
Determine angle.
B, according to the position of Fluid pressure and flow measurement points in step 1-c, on angle bottom plate 10 on corresponding position
Filtering plug is installed in first lautertuns 15, sealing rubber plug is installed in remaining all first lautertuns 15.It will be installed with pipeline again
There is liquid outlet groove 14 corresponding to the liquid outlet groove 14 of filtering plug to be connected with the testing tube group 13 on 1 side wall of diversion chamber, testing tube group 13
It is connected to external fluid metering device and fluid pressure meter.
C, the maximum seam according to test rock sample 6 is high (60mm), and 6 pieces of auxiliary spacers 27 are installed to sealing pressure loading device
On 3, upper and lower two sides respectively install 3 pieces.The consistent seal grease on the contact surface of auxiliary spacer 27 is needed before installation.Auxiliary is not installed
The feed pathway 26 of gasket 27 is sealed with sealing bolt 29.Entire feed pathway 26 is installed into the sealing rubber pad with hole
28。
D, the arc according to the position of bifurcated crack tail portion on test rock sample 6, in seam 4 corresponding position of tail pressure loading device
Installation filtering gasket in lautertuns 33, and rubber gasket 37 with holes is installed at the filtering notch, remaining is without measurement
It filters notch and non-porous gasket is installed.
E, the test rock sample 6 prepared is placed on angle bottom plate 10, by sealing pressure loading device 3, seam tail pressure
Loading device 4, clossing pressure loading blocks 5 are installed to the corresponding position of diversion chamber 1.Clossing pressure loading blocks 5 are applied first
0.5MPa prestressing force, pressure process guarantee that sealing is in the middle position of diversion chamber 1 as far as possible.Then filled by sealing pressure-loaded
The special operations block 30 for setting 3 both ends finely tunes the relative position of feed pathway 26 and crack sealing.Then sealing pressure-loaded is filled
Set the prestressing force of 3 and the seam application of tail pressure loading device 4 0.5MPa.
F, auxiliary block 19 is placed on test rock sample 6, one end of slit width probe 25 is passed through into 24 inserting step of guide groove
In 1-d in slit width measurement point jack, the other end is mounted in probe sliding rail 23, and is displaced with the slide rail type of slit width measuring device 21
Sensor 22 connects.
G, deflecting loading blocks 18 are installed in auxiliary block 19, adjust the angle-regulating block 12 of diversion chamber 1, guarantees that deflecting adds
Carrying block 18 being capable of normal load.18 upper end of deflecting loading blocks connects lateral pressure machine, applies 0.5MPa to test rock sample 6 and answers in advance
Power.
3. flow conductivity is tested
A, start pressure break fluid supply pump and open the liquid feed valve 32 on sealing pressure loading device 3, open one by one, close and lead
The testing tube group 13 of flow chamber 1 and the liquid valve 38 of seam tail pressure loading device 4, guarantee in entire test macro and man-made fracture 39
The circulation of fluid.
B, formal experiment test flow conductivity is carried out with testing scheme in Figure 13.
(1) Global bifurcation fracture condudtiviy is tested
Open diversion chamber 1 testing tube group to be measured 13 and seam tail pressure loading device 4 liquid valve 38(include a, b, c,
D), the apparatus for metering fluids and fluid pressure meter connected by each testing tube group 13 measures major fracture, secondary branch crack section
On Fluid pressure, Fluid pressure and flow in flow and liquid valve 3 at a, b, c, d.
(2) influence of the test branch feathers to flow conductivity
A, c, d in liquid valve 38 are closed, liquid feed valve 32 and liquid valve 38-b, the water conservancy diversion in test evaluation single crack are opened
Ability.
A, b, c in liquid valve 38 are closed, liquid feed valve 32 is opened and liquid valve 38-d, another crack of test evaluation is led
Stream ability.
A, c in liquid valve 38 are closed, the b and d of liquid feed valve 32 and liquid valve 38 are opened, the first of test evaluation crack is divided
The influence that fork develops to its flow conductivity.
The c in liquid valve 38 is closed, a, b, d in liquid feed valve 32 and liquid valve 38 are opened, a flow conductivity is carried out and surveys
Examination is then turned off liquid valve 38-b, opens a, c, d of liquid feed valve 32 and liquid valve 38, then carries out a flow conductivity test, surveys
The influence that the second level bifurcated in examination evaluation crack develops to its flow conductivity
A, b, c, d of liquid feed valve 32 and liquid valve 38 are finally opened, then carries out the flow conductivity test of crack entirety.
The device is at best able to carry out the flow conductivity evaluation in 10 bifurcated branches cracks, be able to carry out maximum seam height with most
Crack height is equally able to carry out conventional panel fracture guide energy than stitching high fracture condudtiviy test evaluation for the change of 1:1 ~ 3:1
Power test evaluation.
Claims (8)
1. becoming the device for stitching high bifurcated fracture condudtiviy under a kind of test triaxial stress, it is characterised in that: three axis of this test
The device for becoming the high bifurcated fracture condudtiviy of seam under stress includes diversion chamber (1), burden pressure loading device (2), sealing pressure
Loading device (3), seam tail pressure loading device (4)；Diversion chamber (1) inner cavity lower part is equipped with angle bottom plate (10), angle bottom plate
(10) connect slope conditioning, test rock sample (6) is placed on angle bottom plate (10), test rock sample (6) be containing it is seamed it is high gradually
The trapezoidal rock beam in the multiple bifurcated crack of variation, burden pressure loading device (2) and angle bottom plate (10) cooperation are realized and are stitched to change
The load of height test rock sample burden pressure；Clossing pressure loading blocks (5) are mounted on the two sides of diversion chamber, to test rock sample (6) two
End applies clossing pressure；Sealing pressure loading device (3) is mounted in test rock sample (6) with seam tail pressure loading device (4) to be split
The both ends of extending direction are stitched, the two cooperation applies the pressure in fracture extension direction to test rock sample (6)；Sealing pressure loading device
(3) it being provided on a plurality of feed pathway (26), feed pathway (26) is connect with man-made fracture (39) sealing of test rock sample (6),
Angle bottom plate (10) is to pass through fixed stay bolt (16) by 20 base pieces successively to assemble；Every piece of base piece two sides open up
There are several liquid outlet grooves (14) and several first lautertuns (15), the first lautertuns (15) is arranged in one end of liquid outlet groove (14), out
Liquid bath (14) connecting test pipe group (13), testing tube group are provided with apparatus for metering fluids and fluid pressure meter on (13)；On cover pressure
Force loading device (2) has slit width measuring device (21), auxiliary block (19), and slit width measuring device (21) is mounted on auxiliary block (19)
Side, slit width measuring device (21) include 19 slide rail type displacement sensors (22), and auxiliary block (19) upper surface includes 19 spies
Needle sliding rail (23) has the guide groove (24) of perforation in auxiliary block (19), and slit width probe (25) one end is inserted into guide groove (24), seam
Wide probe (25) other end is mounted in probe sliding rail (23), the slide rail type position of probe sliding rail (23) and slit width measuring device (21)
Displacement sensor (22) connection；Seam tail pressure loading device (3) is successively composed of 10 loading blocks, and loading blocks are by fixing bolt
(35) it connects, and is installed on the second bearing plate (36), there is arc lautertuns (33) and liquid outlet channel between every two loading blocks
(34), arc lautertuns (33) is arranged in liquid outlet channel (34) one end, and liquid outlet channel (34) other end is connected to liquid valve (38),
Arc filter is installed in arc lautertuns (33), rubber gasket (37) are installed before experiment at arc lautertuns (33) notch.
2. becoming the device for stitching high bifurcated fracture condudtiviy under test triaxial stress according to claim 1, feature exists
In: diversion chamber's (1) upper port covers pressure loading device (2) having a size of 200mm × 200mm, to install；Diversion chamber
(1) feed liquor side is provided with the long square opening of 90mm × 200mm, and to install sealing pressure loading device (3), liquid side is provided with 30 out
× 200mm long square opening, to install seam tail pressure loading device (4)；Diversion chamber (1) two sides are provided with long side 90mm, short side
The trapezoidal mouth of 30mm, high 200mm, to connect clossing pressure loading blocks (5).
3. becoming the device for stitching high bifurcated fracture condudtiviy under test triaxial stress according to claim 2, feature exists
In: the angle bottom plate (10) includes 19 × 19 liquid outlet grooves (14) and 19 × 19 the first lautertuns (15) altogether；Angle bottom
Plate (10) and diversion chamber (1) are rotatablely connected by axis, and there are three liftable jacking systems for installation on diversion chamber (1) pedestal
(17), jacking system (17) upper end withstands on angle bottom plate (10) below；Diversion chamber (1) upper end is equipped with angle-regulating block (12),
Angle-regulating block (12) and diversion chamber (1) are by axis connection, for adjusting the load angle of burden pressure loading device (2).
4. becoming the device for stitching high bifurcated fracture condudtiviy under test triaxial stress according to claim 3, feature exists
In: the maximum seam height and most crack of the test rock sample (6) are at high proportion 1:1 ~ 3:1.
5. becoming the device for stitching high bifurcated fracture condudtiviy under test triaxial stress according to claim 4, feature exists
In: the burden pressure loading device (2) further includes deflecting loading blocks (18), and deflecting loading blocks (18) and auxiliary block (19) are logical
Turning axis (20) connection is crossed, deflecting loading blocks (18) adjust load angle by turning axis (20) according to the shape of test rock sample (6)
Degree；The side of auxiliary block (19) is connect with slit width measuring device (21), there is 19 probe sliding rails (23) and 19 in auxiliary block (19)
× 19 guide grooves (24).
6. becoming the device for stitching high bifurcated fracture condudtiviy under test triaxial stress according to claim 5, feature exists
In: the sealing pressure loading device (3) includes 18 feed pathways (26), and feed pathway (26) one end connects liquid feed valve
(32), liquid feed valve (32) is connect with pressure break fluid supply pump, feed pathway (26) by the load channel of its other end loading end with
Test rock sample (6) contacts and conveys fracturing fluid, and loading end protrudes outward, and the feed pathway of loading end is load channel；Sealing pressure
Force loading device (3) both ends are equipped with special operations block (30)；There is the first bearing plate at sealing pressure loading device (3) rear portion
(31), the first bearing plate (31) is connect with transverse pressure machine.
7. becoming the device for stitching high bifurcated fracture condudtiviy under test triaxial stress according to claim 6, feature exists
In: the elemental height of described sealing pressure loading device (3) loading end is 30mm, contains 6 feed pathways (26), works as test
When sealing height is greater than test rock sample (6) of 30mm, loading end respectively installs the auxiliary spacer (27) that multiple height are 5mm up and down,
Also there is load channel inside auxiliary spacer (27)；Before test, unwanted feed pathway (26) are sealed with sealing bolt (29),
Sealing rubber pad (28) are installed at the load channel being connected with man-made fracture (39) sealing of test rock sample (6).
8. becoming the device for stitching high bifurcated fracture condudtiviy under test triaxial stress according to claim 7, feature exists
In: after the completion of man-made fracture (39) preparation on the test rock sample (6), swathed with seal rubber leather sheath, and use air-heater
Heating is wrapped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710726022.XA CN107462510B (en) | 2017-08-22 | 2017-08-22 | Test the device for becoming under triaxial stress and stitching high bifurcated fracture condudtiviy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710726022.XA CN107462510B (en) | 2017-08-22 | 2017-08-22 | Test the device for becoming under triaxial stress and stitching high bifurcated fracture condudtiviy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107462510A CN107462510A (en) | 2017-12-12 |
| CN107462510B true CN107462510B (en) | 2019-09-27 |
Family
ID=60550318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710726022.XA Active CN107462510B (en) | 2017-08-22 | 2017-08-22 | Test the device for becoming under triaxial stress and stitching high bifurcated fracture condudtiviy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107462510B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110284878B (en) * | 2018-03-19 | 2022-03-29 | 中国石油天然气股份有限公司 | Rock plate sealing device and method |
| CN108827856B (en) * | 2018-07-02 | 2020-09-01 | 中国石油大学(北京) | Rock plate adding device and method for flow conductivity evaluation experiment |
| CN109138996B (en) * | 2018-08-16 | 2022-02-15 | 四川大学 | Grid visualization hydraulic fracturing fracture dynamic expansion simulation device |
| CN110485999B (en) * | 2019-06-27 | 2022-07-22 | 西南石油大学 | Simulation crack module, crack type drilling fluid leaking stoppage testing arrangement |
| CN110939439B (en) * | 2019-12-11 | 2022-12-09 | 东北石油大学 | Long-term conductivity measuring device for continental facies shale oil reservoir fractures |
| CN110955985A (en) * | 2019-12-19 | 2020-04-03 | 长江大学 | Method and device for optimizing fracturing construction parameters and readable storage medium |
| CN114166720B (en) * | 2021-12-07 | 2024-05-07 | 西南石油大学 | Method for testing reservoir fracturing fracture conductivity |
| CN117589654B (en) * | 2023-11-30 | 2024-07-26 | 水利部交通运输部国家能源局南京水利科学研究院 | Seepage erosion test instrument and method for simulating crack-containing contact surface |
| CN118329736B (en) * | 2024-06-11 | 2024-08-16 | 山东石油化工学院 | Reservoir core permeability measuring device |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9051800B2 (en) * | 2012-04-24 | 2015-06-09 | Halliburton Energy Services, Inc. | Multi-fluid injector core holder |
| CN104122147B (en) * | 2014-08-11 | 2016-06-08 | 卢渊 | Wide simulator and method are dynamically stitched in a kind of crack |
| CN104564043B (en) * | 2014-12-18 | 2017-12-01 | 中国石油大学(华东) | A kind of diversion chamber of gas test compact reservoir seam net flow conductivity and its method of work |
| CN104747182A (en) * | 2015-01-28 | 2015-07-01 | 中国石油天然气股份有限公司 | Crack flow conductivity testing method |
| CN106896043B (en) * | 2015-12-21 | 2019-11-08 | 中国石油天然气股份有限公司 | Device for simulating crack initiation and evaluating crack seepage under true triaxial stress |
| CN105545249A (en) * | 2015-12-31 | 2016-05-04 | 中国石油天然气股份有限公司 | Crack sample plate clamping device |
| CN105547967B (en) * | 2016-01-28 | 2019-04-02 | 成都理工大学 | Fissuted medium system permeability tensor indoor measurement device |
| CN105717019B (en) * | 2016-01-28 | 2018-04-06 | 山东科技大学 | Floor rock infiltration coefficient test simulation method |
| CN105973710B (en) * | 2016-06-14 | 2018-10-02 | 长江水利委员会长江科学院 | Complicated crack rock Seepage-stress coupling scene triaxial test system and method |
| CN106121603B (en) * | 2016-06-25 | 2018-09-04 | 东北石油大学 | A kind of device and method for simulating different angle oil reservoir oil displacement efficiency |
| CN106353233B (en) * | 2016-08-05 | 2019-01-11 | 山东大学 | A kind of coarse fracture seepage simulation model of rock mass and production method |
-
2017
- 2017-08-22 CN CN201710726022.XA patent/CN107462510B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107462510A (en) | 2017-12-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107462510B (en) | Test the device for becoming under triaxial stress and stitching high bifurcated fracture condudtiviy | |
| CN107515183B (en) | Test coarse fracture condudtiviy experimental provision and test evaluation method | |
| CN102562040B (en) | Dynamic evaluation instrument for high-temperature and high-pressure drilling fluid loss | |
| CN107782628A (en) | Single fissure rock test specimen staight scissors seepage flow test device and test method under a kind of hydrostatic conditions | |
| CN107421872B (en) | Device for evaluating influence of different factors on water permeability of asphalt pavement | |
| CN104747187B (en) | A kind of high temperature and pressure borehole wall strengthens drilling fluid simulated experimental provision and method | |
| CN106596400B (en) | A kind of evaluating apparatus and experimental method of second contact surface bonding quality of cementing the well | |
| CN102012347B (en) | Method for detecting channeling condition by static gelatinization strength of cement | |
| CN104564043B (en) | A kind of diversion chamber of gas test compact reservoir seam net flow conductivity and its method of work | |
| CN104568595A (en) | Coal bed mining floor grouting infiltration-reducing simulation testing system | |
| Opedal et al. | Laboratory test on cement plug integrity | |
| KR101210838B1 (en) | Apparatus and method for measuring permeability of core samples using water | |
| CN101470107A (en) | Concrete body and test instrument and method for its permeation performance with other medium bonding surface | |
| CN102587889B (en) | Experimental system for simulating solid-phase particles to plug coal (rock) cracks | |
| CN205786605U (en) | A kind of this coal bed gas extraction experimental simulation device | |
| CN115078102B (en) | Geological sequestration CO 2 Leakage channel healing capacity evaluation system and method | |
| CN108240955A (en) | System and method for evaluating damage of cement paste to reservoir | |
| CN106970181B (en) | Drainage consolidation test device and method for grouting slurry behind wall in stratum | |
| WO2012173585A1 (en) | Method and installation for determination of hydro-break pressure of cement stone | |
| CN105866349A (en) | Three-dimensional visual grouting effect test chamber | |
| CN110658120B (en) | Method and device for testing permeability coefficient of foam-improved sandy residue soil under high water pressure | |
| CN108717039B (en) | Critical test simulation equipment for permeation splitting grouting | |
| CN207516210U (en) | Porosity and permeability test device under a kind of simulation stratum condition | |
| CN111366707B (en) | Test system and method for simulating coupling flow of multiple types of water guide channels | |
| CN206339544U (en) | A kind of device for determining sealing agent shut-off capacity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |