CN206319870U - A kind of staged fracturing of horizontal well or synchronous pressure break experimental system for simulating - Google Patents
A kind of staged fracturing of horizontal well or synchronous pressure break experimental system for simulating Download PDFInfo
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- CN206319870U CN206319870U CN201621146646.1U CN201621146646U CN206319870U CN 206319870 U CN206319870 U CN 206319870U CN 201621146646 U CN201621146646 U CN 201621146646U CN 206319870 U CN206319870 U CN 206319870U
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Abstract
The utility model provides a kind of staged fracturing of horizontal well or synchronous pressure break experimental system for simulating, for carrying out fracture simulation to cube artificial rock, including：Fracture simulation component, stress loading device and Crack Monitoring device, fracture simulation component include simulation wellbore hole and liquid injection pipe and apparatus for adjusting position；Simulation wellbore hole is located inside artificial rock, and liquid injection pipe is located in simulation wellbore hole, simulation wellbore hole with liquid injection pipe with different at least two analogue perforations of identical quantity but position.The position of liquid injection pipe is controlled by apparatus for adjusting position, connection between different fracturing section analogue perforations is realized sequentially, pressure break is carried out to different fracturing sections respectively.The synchronous fracturing process of two mouthfuls of water horizontal wells can be simulated using two groups of fracture simulation components.The staged fracturing of horizontal well or synchronous pressure break experimental system for simulating can be that understanding hydraulic fracture propagation law and fracture pattern provide experimental method with interference phenomenon between seam when simulation water horizontal well staged fracturing and the synchronous pressure break of two mouthfuls of water horizontal wells.
Description
Technical field
The utility model is related to the physical simulation experiment technology of the crack initiation of true triaxial hydraulically created fracture and propagation law, especially
It is related to a kind of staged fracturing of horizontal well or synchronous pressure break experimental system for simulating.
Background technology
Hydraulic fracturing is one of key technology of oil gas field storey increase design.With oily for the non-of representative with shale gas and densification
The exploitation of conventional gas and oil resource, horizontal well in segments sub-clustering fracturing technique has obtained large-scale application.In recent years, emerge again
The new technologies such as the synchronous pressure break of many wells, substantially improve reservoir reconstruction effect.Staged fracturing of horizontal well refers to the physical property according to reservoir
Feature carries out staged fracturing for net horizontal section diverse location stratum, and the contact surface in crack and stratum is increased with many pressure break hop counts
Product, obtains higher initil output and improves recovery ratio.Synchronous fracturing technique refers to many saliva horizontal wells apply while carrying out pressure break
Work, it is therefore an objective to increase the density and complexity of hydraulic fracture using the advantage of interwell communication.True triaxial hydraulic fracturing is simulated
Experimental system is to study the effective means of hydraulic fracture crack initiation and propagation law.It is simulation oil field hydraulic fracturing process, will be flowed
Body builds the pressure by prefabricated simulation wellbore hole in high pressure pump group injection rock sample and in wellbore bottom generation, when Fluid pressure exceedes rock
During tensile strength, occur to rupture and continue extension.
At present, lot of domestic and foreign scholar has carried out lot of experiments, but existing skill to hydraulic fracture crack initiation propagation law
Art scheme can only realize the physical analogy to individual well single hop pressure break, it is impossible to dry to intersegmental crack during staged fracturing of horizontal well
The relevant issues such as disturb and carry out experimental study.Chinese invention patent (A of CN 104563993) discloses a kind of shale horizontal well in segments
Fracture simulation experimental method.Soundless cracking agent slurry is filled specifically in horizontal wellbore, the water of simulation is controlled using cut piece
Horizontal well segments, the crack initiation in the sequencing control filling section crack prepared by soundless cracking agent slurry is sequentially.Soundless cracking
Using the inorganic compound through high-temperature calcination based on calcium oxide more than agent slurry, mix what appropriate additive intergrinding was made
Possess the broken pulverulent material of non-explosion of high expansion function, during its dehydration expansion curing, form high pressure and act on
Rock sample, produces crack.
But following 2 problems are primarily present in current research：1) in patent of invention (A of CN 104563993)
The soundless cracking agent slurry that method is used is to produce the active force of crack, i.e. fracture only to form solid crushes rock sample
Cracking initiation point is concentrated on, can't extend and move with crack, therefore can not be in research trends active force hydraulic fracturing process
Fracture formation and the influence of propagation law under fluid matasomatism；2) and currently for the research of staged fracturing or synchronous pressure break
It is less, it is impossible to the affecting laws of the formation of interference fracture and expanded configuration between the seam of many cracks are summed up from theoretical experiment.
Therefore there is the difference of essence with the principle of actual mining site hydrofracturing in current experimental system, and experiment conclusion can not be real for mineral products
The effective guidance of offer is provided.
Utility model content
The utility model provides a kind of staged fracturing of horizontal well or synchronously simulating experimental system, can simulate actual mining site
The formation of Study of Fluid active force fracture and the influence of propagation law, provide significantly more efficient for mineral products on the premise of hydrofracturing
Instruct；Realize staged fracturing simulation when reduce can liquid injection pipe displacement, save experimental system installation footprint；Realize
Split between the well that understanding crack propagation law and the intersegmental crack interference phenomenon of research level well staged fracturing and synchronous pressure break are produced
The mechanism of action of seam interference increase crack complexity.
The utility model provides a kind of staged fracturing of horizontal well or synchronous pressure break experimental system for simulating, for cube people
Work rock sample carries out fracture simulation, including：Fracture simulation component, stress loading device and Crack Monitoring device, fracture simulation component
Including simulation wellbore hole and liquid injection pipe；Simulation wellbore hole is located inside artificial rock, and the cylinder underseal of simulation wellbore hole is closed, and simulation wellbore hole
Nozzle is located at the outside of artificial rock；At least two simulations axially arranged along simulation wellbore hole are offered on the barrel of simulation wellbore hole
Perforation.
Liquid injection pipe one end is closed, and the other end is connected with feed flow pipeline, the external diameter of liquid injection pipe and the internal diameter phase of simulation wellbore hole
Match somebody with somebody, so that liquid injection pipe is set in simulation wellbore hole, at least two are offered on the tube wall of liquid injection pipe along the arrangement of liquid injection pipe axial direction
The pitch-row between pitch-row and analogue perforation between fluid hole, adjacent fluid hole is differed.
When liquid injection pipe is axially moveable in simulation wellbore hole, at most one fluid hole is relative with analogue perforation position and connects
It is logical, so that the fracturing fluid flowed into liquid injection pipe enters artificial rock by the analogue perforation being connected with fluid hole.
Stress loading device is three, each one side vertical with the alien invasion of artificial rock of stress loading device correspondence
To, and the direction corresponding to different fracture simulation components is perpendicular to one another.
The sensor of Crack Monitoring device is installed in the surface of artificial rock.
Optionally, when fracture simulation component is one, staged fracturing of horizontal well simulated experiment is completed；Fracture simulation component is
At two, the synchronous pressure break simulated experiment of horizontal well is completed, two fracture simulation components are arranged at the same outer vertical of artificial rock
Surface side, each fracture simulation component includes a simulation wellbore hole and a liquid injection pipe.
Optionally, the first order pressure set gradually by cylinder bottom to the nozzle of simulation wellbore hole is offered on the barrel of simulation wellbore hole
Split a section analogue perforation, second level fracturing section analogue perforation and third level fracturing section analogue perforation.Offered on the tube wall of liquid injection pipe
First order fracturing section fluid hole, second level fracturing section fluid hole and the third level pressure set gradually by ttom of pipe to the mouth of pipe of liquid injection pipe
Split a section fluid hole.
Optionally, each fracture simulation component also includes apparatus for adjusting position, and apparatus for adjusting position includes nipple, put down
Plate, leading screw and four support columns, nipple have internal thread hole, and the end that nipple has and fluid injection tube end is connected
Face.
Support column symmetry is fixed on flat board, and leading screw one end is fixed on flat board, the leading screw other end and nipple it is interior
Screwed hole is screwed.
Optionally, the scope of activities of leading screw end is located within the internal thread hole of nipple.
Optionally, artificial rock surface is provided with top board, and apparatus for adjusting position is arranged on top board, and being additionally provided with top board is used for
Make the centre bore that simulation wellbore hole is passed through.
Optionally, the mouth of pipe of liquid injection pipe is additionally provided with adapter, and adapter is abutted with nipple.
Optionally, the two of first order fracturing section fluid hole, second level fracturing section fluid hole and third level fracturing section fluid hole
Side is equipped with sealing ring.
Optionally, Crack Monitoring device is sound emission Crack Monitoring device.
Optionally, two fracture simulation components are respectively the first fracture simulation component and the second fracture simulation component, first
On second simulation wellbore hole of the first simulation wellbore hole of fracture simulation component and the second fracture simulation component have identical quantity and
Away from analogue perforation.
The utility model provides a kind of staged fracturing of horizontal well or synchronously simulating experimental system, by being situated between by pressure break of liquid
Matter, can on the premise of actual mining site hydrofracturing is simulated the formation of Study of Fluid active force fracture and the shadow of propagation law
Ring, significantly more efficient instruct is provided for mineral products；By reasonable design simulation preforation tunnel distance and fluid hole hole position, in reality
Reduced during existing staged fracturing simulation can liquid injection pipe displacement, save experimental system installation footprint；Pass through subsection setup
Analogue perforation, the synchronous pressure breaks of two simulation wellbore holes realize the intersegmental of understanding crack propagation law and research level well staged fracturing
The mechanism of action of crack interference increase crack complexity between the well that crack interference phenomenon and synchronous pressure break are produced.
Brief description of the drawings
Fig. 1 is the structural representation of the staged fracturing of horizontal well that the utility model is provided or synchronous pressure break experimental system for simulating
Figure；
Fig. 2 is the simulation wellbore hole of the staged fracturing of horizontal well that the utility model is provided or synchronous pressure break experimental system for simulating
Structural representation；
Fig. 3 be the staged fracturing of horizontal well that the utility model is provided or synchronous pressure break experimental system for simulating simulation wellbore hole and
The structural representation of artificial rock；
Fig. 4 is the knot of the liquid injection pipe of the staged fracturing of horizontal well that the utility model is provided or synchronous pressure break experimental system for simulating
Structure schematic diagram；
Fig. 5 is the position adjustments dress of the staged fracturing of horizontal well that the utility model is provided or synchronous pressure break experimental system for simulating
The structural representation put；
Fig. 6 is the nipple of the staged fracturing of horizontal well that the utility model is provided or synchronous pressure break experimental system for simulating
Structural representation；
Fig. 7 is the right view for Fig. 6 that the utility model is provided；
Fig. 8 is the structure of the top board of the staged fracturing of horizontal well that the utility model is provided or synchronous pressure break experimental system for simulating
Schematic diagram；
Fig. 9 is the staged fracturing mould of the staged fracturing of horizontal well that the utility model is provided or synchronous pressure break experimental system for simulating
Liquid injection pipe and simulation wellbore hole relative position schematic diagram in draft experiment；
Figure 10 is the synchronous pressure break of the staged fracturing of horizontal well that the utility model is provided or synchronous pressure break experimental system for simulating
The first position relationship schematic diagram of simulated experiment；
Figure 11 is the synchronous pressure break of the staged fracturing of horizontal well that the utility model is provided or synchronous pressure break experimental system for simulating
Second of position relationship schematic diagram of simulated experiment；
Figure 12 is the synchronous pressure break of the staged fracturing of horizontal well that the utility model is provided or synchronous pressure break experimental system for simulating
The third position relationship schematic diagram of simulated experiment；
Figure 13 is the synchronous pressure break of the staged fracturing of horizontal well that the utility model is provided or synchronous pressure break experimental system for simulating
4th kind of position relationship schematic diagram of simulated experiment.
Description of reference numerals：
1- fracture simulation components；2- artificial rocks；
11- simulation wellbore holes；12- liquid injection pipes；
13- stress loading devices；14- Crack Monitoring devices；
15- feed flow pipelines；16- apparatus for adjusting position；
111- analogue perforations；The simulation wellbore holes of 112- first；
The simulation wellbore holes of 113- second；121- fluid holes；
122- adapters；123- sealing rings；
161- nipples；162- flat boards；
163- leading screws；164- support columns；
21- top boards；211- centre bores；
1111- first order fracturing section analogue perforations；1112- second level fracturing section analogue perforation；
1113- third level fracturing section analogue perforations；1211- first order fracturing section fluid holes；
1212- second level fracturing section fluid hole；1213- third level fracturing section fluid holes.
Embodiment
Fig. 1 is the structural representation of the staged fracturing of horizontal well that the utility model is provided or synchronous pressure break experimental system for simulating
Figure, Fig. 2 is the structure of the simulation wellbore hole of the staged fracturing of horizontal well that the utility model is provided or synchronous pressure break experimental system for simulating
Schematic diagram, Fig. 3 be the staged fracturing of horizontal well that the utility model is provided or synchronous pressure break experimental system for simulating simulation wellbore hole and
The structural representation of artificial rock, Fig. 4 is the staged fracturing of horizontal well that the utility model is provided or synchronous pressure break simulated experiment system
The structural representation of the liquid injection pipe of system, Fig. 5 is the staged fracturing of horizontal well that the utility model is provided or synchronous pressure break simulated experiment
The structural representation of the apparatus for adjusting position of system, Fig. 6 is the staged fracturing of horizontal well that the utility model is provided or synchronous pressure break
The structural representation of the nipple of experimental system for simulating, Fig. 7 is the right view for Fig. 6 that the utility model is provided, and Fig. 8 is this reality
With the staged fracturing of horizontal well of new offer or the structural representation of the top board of synchronous pressure break experimental system for simulating, Fig. 9 is this reality
Shown with the staged fracturing of horizontal well of new offer or the liquid injection pipe of synchronous pressure break experimental system for simulating relative to simulation wellbore hole position
It is intended to, Figure 10 is the synchronous fracture simulation of the staged fracturing of horizontal well that the utility model is provided or synchronous pressure break experimental system for simulating
The first position relationship schematic diagram of experiment, Figure 11 is the staged fracturing of horizontal well that the utility model is provided or synchronous fracture simulation
Second of position relationship schematic diagram of the synchronous pressure break simulated experiment of experimental system, Figure 12 is the horizontal well that the utility model is provided
The third position relationship schematic diagram of the synchronous pressure break simulated experiment of staged fracturing or synchronous pressure break experimental system for simulating, Tu13Shi
The 4th of the synchronous pressure break simulated experiment of staged fracturing of horizontal well or synchronous pressure break experimental system for simulating that the utility model is provided
Plant position relationship schematic diagram.
As shown in figures 1-13, the utility model provides a kind of staged fracturing of horizontal well or synchronous pressure break experimental system for simulating,
For carrying out fracture simulation to cube artificial rock 2, including：Fracture simulation component 1, stress loading device 13 and Crack Monitoring
Device 14, fracture simulation component 1 includes simulation wellbore hole 11 and liquid injection pipe 12；Simulation wellbore hole 11 is located inside artificial rock 2, simulation
The cylinder underseal of pit shaft 11 is closed, and simulation wellbore hole 11 nozzle be located at artificial rock 2 outside；Opened up on the barrel of simulation wellbore hole 11
There are at least two analogue perforations 111 axially arranged along simulation wellbore hole 11.
The one end of liquid injection pipe 12 is closed, and the other end is connected with feed flow pipeline 15, external diameter and the simulation wellbore hole 11 of liquid injection pipe 12
Internal diameter matches, so that liquid injection pipe 12 is set in simulation wellbore hole 11, at least two are offered on the tube wall of liquid injection pipe 12 along note
The pitch-row between pitch-row and analogue perforation 111 between the fluid hole 121 of the axial arrangement of liquid pipe 12, adjacent fluid hole 121 not phase
Together.
When liquid injection pipe 12 is axially moveable in simulation wellbore hole 11, at most one fluid hole 121 and the position of analogue perforation 111
It is relative and connect, so that the fracturing fluid flowed into liquid injection pipe 12 enters people by the analogue perforation 111 being connected with fluid hole 121
Work rock sample 2.
Stress loading device 13 is three, and each stress loading device 13 corresponds to one and hung down with the alien invasion of artificial rock 2
Straight direction, and the direction corresponding to different fracture simulation components 1 is perpendicular to one another.
The sensor of Crack Monitoring device 14 is installed in the surface of artificial rock 2.
It should be noted that the staged fracturing of horizontal well or synchronous pressure break experimental system for simulating pass through outside artificial rock 2
Facade sets fracture simulation component 1, fracturing process of the true simulation in this direction.After fracture simulation experiment starts, three stress
Loading device 13 is respectively from different directions to the external load stress of artificial rock 2, and stress loading device 13 is preferably that hydraulic pressure is lived
Plug.Concurrent fracturing liquid is injected in liquid injection pipe 12 by high-pressure pump by feed flow pipeline 15, passes through going out on the tube wall of liquid injection pipe 12
The analogue perforation 111 that fluid apertures 121 flows through simulation wellbore hole 11 enters artificial rock 2, stress loading device 13 and high pressure fracture liquid
Artificial rock 2 is acted on simultaneously, it is inside and outside while pressurization makes the generation of the inside of artificial rock 2 build the pressure, when the pressure of fracturing liquid exceedes
During the tensile strength of rock mass, ruptured inside rock mass.Fracturing liquid can extend with crack to be flowed, i.e. pressure break active force meeting
With fracture extension, therefore crack constantly extends.Formation and the expanded configuration in crack are monitored by Crack Monitoring device 14.Pressure break
Liquid preferably uses water body, can more truly simulate the operating environment of actual mining site.
On above-mentioned basic experiment process basis, also position can be stretched into by adjusting liquid injection pipe 12 in simulation wellbore hole 11
Put, the different fluid holes 121 of adjustment are mutually corresponding with analogue perforation 111, complete staged fracturing simulated experiment.Also, it can also pass through
Two fracture simulation components 1 are preferably provided with each fracture simulation component 1, that is, two groups of simulation wellbore holes 11 and liquid injection pipe are set
12, study respectively this two groups of simulation wellbore holes 11 and liquid injection pipe 12 formation crack between interact, realize two simulation wells
The synchronous pressure break simulated experiment of cylinder 11.Oil/gas Well can truly be simulated by staged fracturing simulated experiment and synchronous pressure break simulated experiment
Fracturing process, effective guidance is provided for mineral products practice.
It is preferred that, the cube that above-mentioned artificial rock 2 is 300mm × 300mm × 300mm.The overall length of simulation wellbore hole 11
Spend for 250mm, external diameter is 15mm, and internal diameter is 10mm.The total length of liquid injection pipe 12 is 250mm, and external diameter is 9mm, and internal diameter is 2mm.For
The external diameter of liquid pipe line 15 is 3mm, and internal diameter is 1mm.The aperture of analogue perforation 111 and fluid hole 121 is 2mm.
Specifically, when fracture simulation component 1 is one, completing staged fracturing of horizontal well simulated experiment；Fracture simulation component 1
For two, the synchronous pressure break simulated experiment of horizontal well is completed, two fracture simulation components 1 are arranged at the same outer of artificial rock 2
Facade side, each fracture simulation component 1 includes a simulation wellbore hole 11 and a liquid injection pipe 12.
It should be noted that working as each fracture simulation component 1 includes a simulation wellbore hole 11 and a liquid injection pipe 12, i.e.,
Staged fracturing simulated experiment can be completed.When setting two fracture simulation components 1, included two simulation wellbore holes 11 and two notes
Liquid pipe 12, both can complete staged fracturing simulated experiment by single group fluid injection, can also complete synchronous by two groups of fluid injections simultaneously
Fracture simulation is tested, and is disturbed between two mouthfuls of wells of research between the seam in crack and is increased the mechanism of action of crack complexity.
Specifically, offering first set gradually by cylinder bottom to the nozzle of simulation wellbore hole 11 on the barrel of simulation wellbore hole 11
Level fracturing section analogue perforation 1111, second level fracturing section analogue perforation 1112 and third level fracturing section analogue perforation 1113；Fluid injection
The first order fracturing section fluid hole 1211, second set gradually by ttom of pipe to the mouth of pipe of liquid injection pipe 12 is offered on the tube wall of pipe 12
Level fracturing section fluid hole 1212 and third level fracturing section fluid hole 1213.
It should be noted that being penetrated by setting first order fracturing section analogue perforation 1111, the simulation of second level fracturing section respectively
Hole 1112, third level fracturing section analogue perforation 1113 and first order fracturing section fluid hole 1211, second level fracturing section fluid hole
1212nd, third level fracturing section fluid hole 1213, can complete the experiment of three-level fracture simulation.As shown in figure 9, when progress first order pressure break
During simulated experiment, liquid injection pipe 12 relative to the from top to bottom position of first liquid injection pipe 12 in the position of simulation wellbore hole 11 such as figure,
The now only connection corresponding with first order fracturing section fluid hole 1211 of first order fracturing section analogue perforation 1111, remaining hole misplaces
Set, therefore the fracturing fluid of injection is only capable of entering artificial rock 2 by first order fracturing section analogue perforation 1111.When the progress second level
Fracture simulation is tested, and liquid injection pipe 12 is relative to the from top to bottom position of second liquid injection pipe 12 in the position of simulation wellbore hole 11 such as figure
Put, now liquid injection pipe 12 is displaced outwardly a segment distance relative to simulation wellbore hole 11, cause only second level fracturing section analogue perforation
1112 connections corresponding with second level fracturing section fluid hole 1212, remaining Kong Jun is shifted to install, therefore the fracturing fluid of injection is only capable of leading to
Cross second level fracturing section analogue perforation 1112 and enter artificial rock 2.When carrying out third level fracture simulation experiment, with second level pressure break
Simulated experiment is similar, and liquid injection pipe 12 is relative to the from top to bottom position of the 3rd liquid injection pipe 12 in the position of simulation wellbore hole 11 such as figure
Put, now liquid injection pipe 12 outwards continues to move to a segment distance relative to simulation wellbore hole 11, cause only third level fracturing section simulation
The connection corresponding with third level fracturing section fluid hole 1213 of perforation 1113, remaining Kong Jun is shifted to install, therefore the fracturing fluid of injection is only
Artificial rock 2 can be entered by third level fracturing section analogue perforation 1113.By staged fracturing simulated experiment, simulation well can be studied
The propagation law of crack interference phenomenon and hydraulic fracture between the different fracturing sections of cylinder 11.
It should be noted that the priority that above-mentioned three-level staged fracturing simulated experiment can need to arrange for its completion according to experiment is suitable
Sequence, it is not limited to the order that its title is limited.
It is preferred that, above-mentioned first order fracturing section analogue perforation 1111, second level fracturing section analogue perforation 1112 and the 3rd
The nozzle of 1113 range simulation pit shaft of level fracturing section analogue perforation 11 is respectively 200mm, 150mm and 100mm.First order fracturing section goes out
Fluid apertures 1211, second level fracturing section fluid hole 1212 and third level fracturing section fluid hole 1213 are respectively apart from the mouth of pipe of liquid injection pipe 12
225mm, 185mm and 145mm.When carrying out the experiment of second level fracture simulation and the experiment of third level fracture simulation, the phase of liquid injection pipe 12
10mm is for the outer distance moved of simulation wellbore hole 11.
Specifically, each fracture simulation component 1 also includes apparatus for adjusting position 16, apparatus for adjusting position 16 connects including screw thread
First 161, flat board 162, leading screw 163 and four support columns 164, nipple 161 have internal thread hole, and nipple 161 has
There is the end face connected with the end of liquid injection pipe 12.
Support column 164 is symmetrically fixed on flat board 162, and the one end of leading screw 163 is fixed on flat board 162, the other end of leading screw 163
Screwed with the internal thread hole of nipple 161.
Specifically, the scope of activities of the end of leading screw 163 is located within the internal thread hole of nipple 161.
It should be noted that the activity on leading screw 163 by nipple 161, limits liquid injection pipe 12 in simulation wellbore hole 11
Interior position.Cooperated by flat board 162 and support column 164, stress loading device 13 is connected to the surface of flat board 162, flat board
162 are used to the stress to the surface of artificial rock 2 transmission stress loading device 13.The scope of activities of the end of leading screw 163 is located at screw thread
Within the internal thread hole of joint 161, i.e., nipple 161 is only limited on leading screw 163 movable.The apparatus for adjusting position 16 is used to
The position of liquid injection pipe 12 is adjusted and fixed, fracturing fluid hypertonia in artificial rock 2 is prevented, liquid injection pipe 12 exits simulation wellbore hole
Deviation occurs for 11 or both positions, causes fluid hole 121 can not be corresponded to analogue perforation 111 and connects.
It is preferred that, above-mentioned flat board 162 is 300mm × 300mm × 40mm aluminium sheet.Support column 164 is preferably four, relatively
It is symmetrical arranged in flat board 162, its a diameter of 80mm.The a diameter of 20mm of leading screw 163, is external thread structure.As shown in Figures 6 and 7, spiral shell
Line joint 161 is T-shape structure, and a diameter of 20mm of central through hole, is female thread structure.
Specifically, the surface of artificial rock 2 is provided with top board 21, apparatus for adjusting position 16 is arranged on top board 21, on top board 21
It is additionally provided with the centre bore 211 for passing through simulation wellbore hole 11.
Specifically, the mouth of pipe of liquid injection pipe 12 is additionally provided with adapter 122, adapter 122 is abutted with nipple 161.
It should be noted that the top board 21 on the surface of artificial rock 2 is to ensure the surface uniform force of artificial rock 2, and note
It is also to ensure that liquid injection pipe 12 will not be by liquid by being abutted with nipple 161 that the mouth of pipe of liquid pipe 12, which sets adapter 122,
Pressure releases simulation wellbore hole 11.
It is preferred that, top board 21 is 300mm × 300mm × 25mm aluminium sheet, a diameter of 25mm of centre bore 211.
Specifically, first order fracturing section fluid hole 1211, second level fracturing section fluid hole 1212 and third level fracturing section go out
The both sides of fluid apertures 1213 are equipped with sealing ring 123.
It should be noted that due to liquid injection pipe 12 can be reserved between the external diameter of liquid injection pipe 12 and the internal diameter of simulation wellbore hole 11
Required space when being inserted in, phase between the two is can be seen that according to the above-mentioned preferred external diameter of liquid injection pipe 12 and the internal diameter of simulation wellbore hole 11
Poor 1mm, after preventing that fracturing fluid is passed through, adjacent analog perforation 111 is penetrated into along this gap, therefore equal in each both sides of fluid hole 121
Sealing ring 123 is set.It is preferred that, the thickness of sealing ring 123 is more than 1mm.
Specifically, Crack Monitoring device 14 is sound emission Crack Monitoring device.
It should be noted that sound emission Crack Monitoring device by sensor, preamplifier, data acquisition processing system and
Record analysis shows that four parts of system are constituted.Sensor receives collection from acoustic emission source in sound emission Crack Monitoring device
Acoustic signals, i.e. acoustic emission signal, this acoustic emission signal have reacted the form of the internal fissure of artificial rock 2.The sound emission of reception
After signal amplifies through preamplifier, and after being processed by signal acquiring processing system to acoustic emission signal, by record display system
System is recorded, analyzed and shown, so that the intuitively formation in analysis crack and expanded configuration.
Specifically, two fracture simulation components 1 are respectively the first fracture simulation component and the second fracture simulation component, first
There is identical number on first simulation wellbore hole 112 of fracture simulation component and the second simulation wellbore hole 113 of the second fracture simulation component
The analogue perforation 111 of amount and spacing.
It should be noted that completing two simulation wellbore holes by setting the first simulation wellbore hole 112 and the second simulation wellbore hole 113
11 synchronous pressure break simulated experiments, this staged fracturing of horizontal well or synchronous pressure break experimental system for simulating have four kinds of position relationships.Such as
Shown in Figure 10, it is illustrated that be the first position relationship, both the first simulation wellbore hole 112 and the second simulation wellbore hole 113 are located at artificial
The internal depth of rock sample 2 is identical, both first order fracturing section analogue perforations 1111, second level fracturing section analogue perforation 1112 and
Three-level fracturing section analogue perforation 1113 is each mutually corresponding.As shown in figure 11, second of position relationship is the first simulation wellbore hole
112 with the second simulation wellbore hole 113 both different, both first order fracturing section analogue perforations that are located at the internal depth of artificial rock 2
1111st, second level fracturing section analogue perforation 1112 and third level fracturing section analogue perforation 1113 are each mutually corresponding.Such as Figure 12
Shown, the third position relationship is that both the first simulation wellbore hole 112 and the second simulation wellbore hole 113 are located at the inside of artificial rock 2 deeply
Spend identical, both first order fracturing section analogue perforation 1111, second level fracturing section analogue perforation 1112 and third level fracturing sections
The respective setting of mutually staggering of analogue perforation 1113.As shown in figure 13, the 4th kind of position relationship is the first simulation wellbore hole 112 and the
Two simulation wellbore holes 113 both to be located at the internal depth of artificial rock 2 different, both first order fracturing section analogue perforations 1111, the
The respective setting of mutually staggering of two grades of fracturing section analogue perforations 1112 and third level fracturing section analogue perforation 1113.
By the setting of above-mentioned four kinds of position relationships, can probe into the depth of simulation wellbore hole 11 and analogue perforation 111 whether phase
The influence of two factor fracture formation extensions of correspondence.Therefore different (or phases can be simulated respectively by setting four kinds of position relationships
Two mouthfuls of water horizontal wells of depth together), fracturing section is relative and the pressure break modification scheme such as be interspersed under crack propagation law.
Staged fracturing of horizontal well or synchronous pressure break experimental system for simulating that the utility model is provided, by using liquid as pressure break
Medium, the pressure break point of application can flow in crack with liquid and change position, realization dynamic force fracture formation and
The research of propagation law, simulates actual mining site hydrofracturing situation, and significantly more efficient instruct is provided for mineral products；By rationally designing
The eyelet distance of analogue perforation 111 and the hole position of fluid hole 121, in staged fracturing reduce can liquid injection pipe 12 displacement,
Reduce installing space needed for experimental system；By subsection setup analogue perforation 111, the synchronous pressure break of two simulation wellbore holes 11 can be real
Now recognize crack propagation law and study and done between the analogue perforation 111 of staged fracturing and the caused seam of synchronous pressure break simulation wellbore hole 11
Disturb fracture formation and the influence of expanded configuration.
Finally it should be noted that：Various embodiments above is only limited to illustrate the technical solution of the utility model, rather than to it
System；Although the utility model is described in detail with reference to foregoing embodiments, one of ordinary skill in the art should
Understand：It can still modify to the technical scheme described in foregoing embodiments, or to which part or whole
Technical characteristic carries out equivalent；And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality newly
The scope of each embodiment technical scheme of type.
Claims (10)
1. a kind of staged fracturing of horizontal well or synchronous pressure break experimental system for simulating, for carrying out pressure break mould to cube artificial rock
Intend, it is characterised in that including：Fracture simulation component, stress loading device and Crack Monitoring device, the fracture simulation component bag
Include simulation wellbore hole and liquid injection pipe；The simulation wellbore hole is located inside the artificial rock, and the cylinder underseal of the simulation wellbore hole is closed, and
The nozzle of the simulation wellbore hole is located at the outside of the artificial rock；At least two edges are offered on the barrel of the simulation wellbore hole
The analogue perforation that the simulation wellbore hole is axially arranged；
Liquid injection pipe one end closing, the other end is connected with feed flow pipeline, the external diameter of the liquid injection pipe and the simulation wellbore hole
Internal diameter matches, so that the liquid injection pipe is set in the simulation wellbore hole, at least two are offered on the tube wall of the liquid injection pipe
The hole between pitch-row and the analogue perforation between the individual fluid hole axially arranged along the liquid injection pipe, the adjacent fluid hole
Away from differing；
When the liquid injection pipe is axially moveable in the simulation wellbore hole, at most one fluid hole and analogue perforation position
Put relative and connect, so that the fracturing fluid flowed into the liquid injection pipe is entered by the analogue perforation being connected with the fluid hole
The artificial rock；
The stress loading device is three, and each stress loading device corresponds to the alien invasion of one and the artificial rock
Vertical direction, and the direction corresponding to the different fracture simulation components is perpendicular to one another；
The sensor of the Crack Monitoring device is installed in the surface of the artificial rock.
2. staged fracturing of horizontal well according to claim 1 or synchronous pressure break experimental system for simulating, it is characterised in that described
When fracture simulation component is one, staged fracturing of horizontal well simulated experiment is completed；When the fracture simulation component is two, complete
Horizontal well synchronization pressure break simulated experiment, two fracture simulation components are arranged at the same alien invasion of the artificial rock
Side, each fracture simulation component includes a simulation wellbore hole and a liquid injection pipe.
3. staged fracturing of horizontal well according to claim 2 or synchronous pressure break experimental system for simulating, it is characterised in that described
The first order fracturing section simulation set gradually by cylinder bottom to the nozzle of the simulation wellbore hole is offered on the barrel of simulation wellbore hole to penetrate
Hole, second level fracturing section analogue perforation and third level fracturing section analogue perforation；Offered on the tube wall of the liquid injection pipe by described
First order fracturing section fluid hole, second level fracturing section fluid hole and third level pressure break that the ttom of pipe of liquid injection pipe to the mouth of pipe is set gradually
Section fluid hole.
4. staged fracturing of horizontal well or synchronous pressure break experimental system for simulating according to claim any one of 1-3, its feature
It is that each fracture simulation component also includes apparatus for adjusting position, the apparatus for adjusting position includes nipple, put down
Plate, leading screw and four support columns, the nipple have internal thread hole, and the nipple has and the liquid injection pipe
The end face of end connection；
It is described support column symmetry be fixed on flat board, described leading screw one end is fixed on the flat board, the leading screw other end and
The internal thread hole of the nipple is screwed.
5. staged fracturing of horizontal well according to claim 4 or synchronous pressure break experimental system for simulating, it is characterised in that described
The scope of activities of leading screw end is located within the internal thread hole of the nipple.
6. staged fracturing of horizontal well or synchronous pressure break experimental system for simulating according to claim any one of 1-3, its feature
It is that the artificial rock surface is provided with top board, the apparatus for adjusting position is arranged on the top board, also set on the top board
There is the centre bore for passing through the simulation wellbore hole.
7. staged fracturing of horizontal well according to claim 4 or synchronous pressure break experimental system for simulating, it is characterised in that described
The mouth of pipe of liquid injection pipe is additionally provided with adapter, and the adapter is abutted with the nipple.
8. staged fracturing of horizontal well according to claim 3 or synchronous pressure break experimental system for simulating, it is characterised in that described
The both sides of first order fracturing section fluid hole, the second level fracturing section fluid hole and the third level fracturing section fluid hole are equipped with
Sealing ring.
9. staged fracturing of horizontal well or synchronous pressure break experimental system for simulating according to claim any one of 1-3, its feature
It is that the Crack Monitoring device is sound emission Crack Monitoring device.
10. staged fracturing of horizontal well according to claim 2 or synchronous pressure break experimental system for simulating, it is characterised in that two
The individual fracture simulation component is respectively the first fracture simulation component and the second fracture simulation component, the first fracture simulation group
There is the mould of identical quantity and spacing on second simulation wellbore hole of the first simulation wellbore hole of part and the second fracture simulation component
Intend perforation.
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| CN201621146646.1U CN206319870U (en) | 2016-10-21 | 2016-10-21 | A kind of staged fracturing of horizontal well or synchronous pressure break experimental system for simulating |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401551A (en) * | 2016-10-21 | 2017-02-15 | 中国石油大学(北京) | Simulation experiment system for staged fracturing or simultaneous fracturing of horizontal wells |
| CN111119831A (en) * | 2020-02-27 | 2020-05-08 | 山东大学 | Indoor simulation test device for staged fracturing of horizontal well and operation method thereof |
| CN114293964A (en) * | 2021-12-30 | 2022-04-08 | 中国石油大学(北京) | System and method for evaluating active utilization effect of space stress field indoors |
| CN115142828A (en) * | 2021-03-31 | 2022-10-04 | 中国石油化工股份有限公司 | Horizontal well staged fracturing simulation wellbore, and experiment device and experiment method thereof |
| CN116181301A (en) * | 2023-03-08 | 2023-05-30 | 中国石油大学(北京) | Simulation method and simulation system for fracturing multi-joint interference of three-dimensional well pattern of horizontal well |
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2016
- 2016-10-21 CN CN201621146646.1U patent/CN206319870U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401551A (en) * | 2016-10-21 | 2017-02-15 | 中国石油大学(北京) | Simulation experiment system for staged fracturing or simultaneous fracturing of horizontal wells |
| CN111119831A (en) * | 2020-02-27 | 2020-05-08 | 山东大学 | Indoor simulation test device for staged fracturing of horizontal well and operation method thereof |
| CN111119831B (en) * | 2020-02-27 | 2023-10-17 | 山东大学 | Horizontal well staged fracturing indoor simulation test device and operation method thereof |
| CN115142828A (en) * | 2021-03-31 | 2022-10-04 | 中国石油化工股份有限公司 | Horizontal well staged fracturing simulation wellbore, and experiment device and experiment method thereof |
| CN114293964A (en) * | 2021-12-30 | 2022-04-08 | 中国石油大学(北京) | System and method for evaluating active utilization effect of space stress field indoors |
| CN114293964B (en) * | 2021-12-30 | 2022-08-26 | 中国石油大学(北京) | System and method for evaluating active utilization effect of space stress field indoors |
| CN116181301A (en) * | 2023-03-08 | 2023-05-30 | 中国石油大学(北京) | Simulation method and simulation system for fracturing multi-joint interference of three-dimensional well pattern of horizontal well |
| CN116181301B (en) * | 2023-03-08 | 2023-09-19 | 中国石油大学(北京) | Simulation method and simulation system for fracturing multi-joint interference of three-dimensional well pattern of horizontal well |
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