CN109869126A - A kind of pressure break simulation by tracing experimental provision and experimental method - Google Patents
A kind of pressure break simulation by tracing experimental provision and experimental method Download PDFInfo
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Abstract
The present invention discloses a kind of pressure break simulation by tracing experimental provision and experimental method, and experimental provision includes that fracturing fluid just squeezes simulation system, fracturing fluid recovery (backflow) simulation system；It includes injection pump, intermediate receptacle, reservoir simulation slot, high pressure flow container, gas cylinder that fracturing fluid, which is just squeezing simulation system,；Fracturing fluid recovery (backflow) simulation system includes sample bottle, back-pressure valve, reservoir simulation slot, high pressure flow container, injection pump；Reservoir simulation slot includes simulation fracture, simulation supplying layer, simulation reservoir；It is located at the edge of reservoir simulation slot using the simulation supplying layer that epoxy resin consolidates big partial size haydite production, analog pressure break returns energy supplement of row's stage remote well reservoir fluid near wellbore zone.Experimental provision of the present invention squeezes into stratum including analog fracturing fluid and returning for fracturing fluid is drained through journey, has the advantages that experiential function is complete, equipment operation is easy, can meet the requirement of the experiment simulation of pressure break tracer technique.
Description
Technical field
The invention belongs to the physical simulation experiment technical fields of petroleum gas, are related to a kind of pressure break simulation by tracing experiment dress
It sets and experimental method.
Background technique
As China is hypotonic, the large-scale development of the special oil gas fields such as hypotonic, fine and close, fracturing reform is to realize that such reservoir is high
The key technology of exploitation is imitated, but due to the multiple influence of geologic(al) factor and engineering factor, there is fracturing fractures to be difficult to effective table
It levies, be actually formed the problems such as seam net and analog result deviation are big.
This technological means of pressure break tracer is applied on mining site at present to carry out the evaluation to fracturing effect, but due to the skill
Art complexity is higher, and purely theoretical research is often difficult to and mining site is practical matches.At present to different fracture patterns, different storages
Layer feature, the different rows of returning system fracturing liquid return the understanding of row's feature still in its infancy, it is difficult to according to fracturing fluid recovery (backflow) spy
Sign carrys out quantitative description pressure-break form, needs to develop theory of the special physical simulation experiment device to assist pressure break tracer technique
Research and filed application.
Summary of the invention
In view of the deficiencies of the prior art and shortcoming, the present invention provide a kind of pressure break simulation by tracing experimental provision and experiment side
Method, the present invention can be according to fracturing fluid recovery (backflow) features come quantitative description pressure-break form.
The technical solution adopted by the invention is as follows:
A kind of pressure break simulation by tracing experimental provision, including injected system, reservoir simulation slot, recyclable device and driving system, the row of returning
System, the outlet of injected system connect with the import of reservoir simulation slot, the outlet of injected system equipped with valve, injected system for
Fluid used in pressure break different phase is injected in reservoir simulation slot, reservoir simulation slot is for simulating pressure break and the row of returning；
The import of reservoir simulation slot is connect with recyclable device, and the entrance of recyclable device is equipped with valve, and recyclable device is used for back
Receive the fluid that discharge is returned from reservoir simulation slot；
The row's of returning drive system includes high pressure flow container, the first injection pump and gas cylinder, is equipped with Air-tight piston inside high pressure flow container；
It is the first airtight chamber that Air-tight piston side is in inside high pressure flow container, is the second closed chamber in the Air-tight piston other side
Room；The outlet of the outlet of first airtight chamber and gas cylinder, gas cylinder is equipped with valve；Second airtight chamber and the first injection pump
The outlet of the outlet of outlet and reservoir simulation slot, the first injection pump is equipped with valve.
Injected system includes the second injection pump and several intermediate receptacles, and several intermediate receptacles are parallel with one another, the second injection pump
Outlet be connected with the entrance of intermediate receptacle, the outlet of intermediate receptacle is connected with the entrance of reservoir simulation slot；Intermediate receptacle goes out
Entrance is provided with valve.
Reservoir simulation slot includes closed shell and the simulation fracture being set in shell, simulation supplying layer and simulation storage
Layer, outlet and entrance is respectively set in opposite both ends on shell, exports opposite with entrance；Simulation fracture inlet porting from shell
One end be arranged on shell outlet one end extend；Simulate supplying layer shape be it is U-shaped, the wing side for simulating supplying layer is set to
On shell on the inner wall parallel with simulation fracture extending direction, the bottom edge for simulating supplying layer, which is set on shell, is arranged outlet
On the inner wall of one end；The wing Bian Pinghang of simulation fracture and simulation supplying layer；Simulation reservoir is filled in shell；Simulation fracture
Entrance is connected to the entrance on shell.
The material of the simulation fracture and simulation supplying layer is the haydite consolidated using epoxy resin, in simulation fracture
Proppant is proppant used in the pressing crack construction of simulation；Simulation reservoir is the smashed particle of earth cuttings.
The valve of recyclable device entrance is valve group, and valve group includes back-pressure valve and shut-off valve, shut-off valve and recyclable device
Entrance by piping connection, back-pressure valve is set on the pipeline between shut-off valve and recyclable device entrance.
Recyclable device includes sample bottle and weighing device, and sample bottle is set on weighing device.
A kind of pressure break simulation by tracing experimental method is carried out using the above-mentioned device of the present invention, is included the following steps:
S1: simulated formation water saturation reservoir simulation slot is used；The valve for closing injected system outlet, is filled into injected system
Fluid used in pressure break different phase；Gas cylinder is opened, makes the gas for being full of preset pressure in the first airtight chamber, closes gas cylinder
The valve of outlet and the first injection pump discharge；
S2: fluid used in pressure break different phase is successively injected into reservoir simulation slot using injected system, has been injected
Cheng Hou closes the valve of injected system outlet；
S3: the valve of the valve of recyclable device entrance, the first injection pump and the first injection pump discharge, the first injection are opened
Simulated formation water is injected into the second airtight chamber of high pressure flow container by pump, so that effect of the fluid in reservoir simulation slot in pressure
Under returned and drained into recyclable device with preset pressure；
S4: pressure-break form is described according to the fluid recycled in recyclable device.
The pressure of first closed chamber indoor gas is less than the injection pressure of injected system；The pressure of first closed chamber indoor gas
What the valve that power is greater than recyclable device entrance can be provided returns row pressure power；The pressure of first closed chamber indoor gas is less than the first note
Enter the pressure that pump provides.
The invention has the following beneficial effects:
Pressure break simulation by tracing experimental provision of the invention can inject pressure break not into reservoir simulation slot using injected system
With fluid used in the stage, it can simulate pressure break using reservoir simulation slot and return and be drained through journey, it can using the row's of returning drive system
Fluid in driving reservoir simulation slot carries out the row of returning, and the stream that discharge is returned from reservoir simulation slot can be recycled using recyclable device
Body, to describe in the form of pressure-break；High pressure flow container is connected with reservoir simulation slot and the second injection pump, can simulate the row's of returning stage pressure
Split mixing and dispersion of the liquid in formation fluid.Specifically, pressure break simulation by tracing experimental provision of the invention is when in use:
Firstly, with simulated formation water saturation reservoir simulation slot；The valve for closing injected system outlet, is filled out into injected system
Fluid used in different phase is split in pressurising；Gas cylinder is opened, makes the gas for being full of preset pressure in the first airtight chamber, closes gas
The valve of bottle outlet and the first injection pump discharge；Then, pressure break successively is injected not into reservoir simulation slot using injected system
With fluid used in the stage, to simulate the process that fracturing fluid squeezes into stratum, after the completion of injection, the valve of injected system outlet is closed
Door；Then, the valve of the valve of opening recyclable device entrance, the first injection pump and the first injection pump discharge, the first injection pump
Simulated formation water is injected into the second airtight chamber of high pressure flow container, so that the fluid in reservoir simulation slot is under the effect of the pressure
It is returned and is drained into recyclable device with preset pressure；This secondary process simulation the returning of fracturing fluid is drained through journey；Finally, according in recyclable device
The fluid of recycling carrys out quantitative description pressure-break form.From the above, it is seen that experimental provision of the invention has experiential function neat
Entirely, easy to operate, have the characteristics that can satisfy that pressure break is just squeezing through journey and pressure break is returned and is drained through journey, solving pressure break tracer can not be quasi-
The problem really simulated.
It further, include several intermediate receptacles in injected system of the invention, therefore can by several intermediate receptacles
Different fluid used in pressure break different phase is stored respectively, is respectively provided with valve in the entrance of each intermediate receptacle, therefore just
Different fluid is injected separately into fracturing process.
Further, prolong one end that outlet is arranged on shell for one end of simulation fracture of the present invention inlet porting from shell
It stretches；Simulate supplying layer shape be it is U-shaped, simulate supplying layer wing side be set on shell it is parallel with simulation fracture extending direction
Inner wall on, simulate supplying layer bottom edge be set on shell be arranged exit end inner wall on；Simulation fracture and simulation
The wing Bian Pinghang of supplying layer；Simulation reservoir be filled in shell, therefore by simulation supplying layer can simulated formation to nearly well
The energy supplement of band, simulation reservoir can simulate quasi- tracer and fracturing fluid the absorption and injury of rock core pore throat the characteristics of.It should
The reservoir simulation slot of structure can preferably simulate mixing and dispersion of the row's of returning stage fracturing fluid in formation fluid.
Further, the valve of recyclable device entrance is valve group, and valve group includes back-pressure valve and shut-off valve, shut-off valve with
The entrance of recyclable device is set on the pipeline between shut-off valve and recyclable device entrance by piping connection, back-pressure valve, therefore
It can be realized the blocking and circulation of the first injection pump and second airtight chamber's fluid by shut-off valve, not by back-pressure valve analog
With the fracturing fluid recovery (backflow) rule under producing pressure differential.
By the beneficial effect of aforementioned present invention pressure break simulation by tracing experimental provision it is found that pressure break simulation by tracing of the invention is real
Proved recipe method clear process, operating process are easy, can simulate that pressure break is just squeezing through journey and pressure break is returned and is drained through journey, and obtain pressure break just
It squeezes through journey and pressure break returns the characteristics of being drained through journey, therefore solve the problems, such as that pressure break tracer can not accurate simulation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of pressure break simulation by tracing experimental provision of the present invention；
Fig. 2 is the simplified structure diagram of reservoir simulation slot in the embodiment of the present invention.
In figure: the second injection pump of 1-, the first valve of 2-1-, the second valve of 2-2-, 2-3- third valve, the 4th valve of 2-4-
Door, the 5th valve of 2-5-, the 6th valve of 2-6-, the 7th valve of 2-7-, the 8th valve of 2-8-, 2-9- shut-off valve, in 3-1- first
Between container, the second intermediate receptacle of 3-2-, 3-3- third intermediate receptacle, 4- reservoir simulation slot, 4-1- simulation fracture, 4-2- simulation storage
Layer, 4-3- simulate supplying layer, 4-4- import, and 4-5- is exported, 5- high pressure flow container, the first injection pump of 6-, 7- gas cylinder, 8- back-pressure valve,
9- sample bottle, 10- electronic balance.
Specific embodiment
Below will by embodiment, the present invention is further illustrated, need described herein be the present embodiment to be only this hair
Bright in light of the circumstances a implementation method, is not intended to limit the invention in any way, it is all according to the technical essence of the invention into
Capable any simple modification, change and other variations, are within the scope of the invention.
Referring to Fig.1, the pressure break simulation by tracing experimental provision of one embodiment of the invention include fracturing fluid just squeeze simulation system with
And fracturing fluid recovery (backflow) simulation system；Fracturing fluid is just squeezing simulation system including in the second injection pump 1, the first intermediate receptacle 3-1, second
Between container 3-2, third intermediate receptacle 3-3, reservoir simulation slot 4, high pressure flow container 5 and gas cylinder 7；Fracturing fluid recovery (backflow) simulation system includes
Sample bottle 9, back-pressure valve 9, reservoir simulation slot 4, high pressure flow container 5 and the first injection pump 6；Wherein reservoir simulation slot 4 and high pressure flow container 5
Simulation system and the common device of fracturing fluid recovery (backflow) simulation system are just squeezed for fracturing fluid；The outlet of second injection pump 1 is respectively with
One intermediate receptacle 3-1, the second intermediate receptacle 3-1 are connected with the entrance of third intermediate receptacle 3-3, and the first intermediate receptacle 3-1,
The inlet and outlet of second intermediate receptacle 3-1 and third intermediate receptacle 3-3 are mounted on valve, which uses shut-off valve；Storage
The outlet phase of the import 4-4 and the first intermediate receptacle 3-1, the second intermediate receptacle 3-1 and third intermediate receptacle 3-3 of layer simulated slot 4
Even, the outlet 4-5 of reservoir simulation slot 4 is connected with the entrance of the entrance of high pressure flow container 5 and sample bottle 9；The entrance of sample bottle 9
Back-pressure valve 8 is installed on the pipeline between the outlet 4-4 of reservoir simulation slot, the outlet 4-4 of back-pressure valve 8 and reservoir simulation slot it
Between pipeline on shut-off valve 2-9 is installed；Sample bottle 9 is placed on electronic balance 10, and electronic balance 10 is for constantly weighing sample
The gross weight of fluid in product bottle 9 and sample bottle 9；Air-tight piston is installed, high pressure flow container is divided by Air-tight piston in high pressure flow container 5
Top (i.e. the second sealed chamber) and lower part (i.e. first annular seal space room) are used for fill liquid in the second sealed chamber, and second is close
It seals and is used for filling gas in chamber；Second sealed chamber of high pressure flow container 5 is connected with the outlet of the first injection pump 6, high pressure liquid
Second sealed chamber of tank 5 is connected with the outlet of gas cylinder 7, and is equipped on pipeline between high pressure flow container 5 and the first injection pump 6
7th valve 2-7 is equipped with the 8th valve 2-8, the 7th valve 2-7 and the 8th valve on the pipeline between high pressure flow container 5 and gas cylinder 7
Door 2-8 is all made of shut-off valve；Reservoir simulation slot 4 includes closed shell and the simulation fracture 4-1 being set in shell, simulation
Supplying layer 4-3 and simulation reservoir 4-2；Simulation supplying layer 4-3 is set to the bottom and side wall of interior of shell, and simulation fracture 4-1 is set
Be placed in the cavity that surrounds of simulation supplying layer 4-3, simulation reservoir 4-2 be filled in simulation fracture 4-1 and simulation supplying layer 4-3 it
Between；Wherein, the shape of simulation fracture 4-1 is cuboid, is made of the haydite of epoxy resin consolidation；Simulation supplying layer 4-3 is adopted
The big partial size haydite consolidated with epoxy resin is fixed-type, with biggish flow conductivity；It simulates reservoir 4-2 and uses formation rock
Bits are filled and are compacted at after crushing between simulation fracture 4-1 and simulation supplying layer 4-3, simulate the partial size of reservoir 4-2 less than 100
Mesh.
The fracturing fluid of pressure break simulation by tracing experimental provision of the invention is just squeezing system analog fracturing fluid and is squeezing into stratum, pressure break
Liquid returns heat-extraction system, and returning for analog fracturing fluid is drained through journey；Multiple intermediate receptacles can be used in the present invention, and multiple intermediate receptacles can be used for
Store different fluid used in pressure break different phase；Simulation reservoir of the invention uses the landwaste simulation storage for crushing and being compacted
Layer, has the characteristics that, analog tracer similar to reservoir lithology and fracturing fluid in the absorption and injury of rock core pore throat, with reality
Reservoir similarity is high；The edge of reservoir simulation slot of the invention is furnished with the simulation supplying layer of high flow conductivity, with high pressure flow container knot
Close energy supplement of the analog stratum near wellbore zone；High pressure flow container of the invention is connected with reservoir simulation slot and injection pump,
Analog returns mixing and dispersion of row's stage fracturing fluid in formation fluid；The row of returning of experimental provision of the invention in simulation pressure break
Stage uses back-pressure valve at sample bottle, the fracturing fluid recovery (backflow) rule under analog difference producing pressure differential.
As the preferred embodiment of the invention, the first injection pump 1 and 6 discharge capacity of the second injection pump can reach 500ml/min,
Its maximum working pressure is 30MPa.
As the preferred embodiment of the invention, hold among the first intermediate receptacle 3-1, the second intermediate receptacle 3-2 and third
The volume of device 3-3 is 2000ml.
As the preferred embodiment of the invention, the resistance to pressure pressure of 4 shell of reservoir simulation slot is 30MPa, as shown in Fig. 2,
The shape of shell is cuboid, positive middle part inlet porting of the shell in face AA ' D ' D, positive middle part setting of the shell in face BB ' C ' C
Outlet；Simulation fracture 4-1 extends from the middle position of face AA ' D ' D to the face direction C ' C BB ', on simulation fracture 4-1 and shell
Entrance connection, there are a certain distance between simulation fracture 4-1 and face BB ' C ' C；Simulation fracture 4-1 and face ABCD and face A ' B '
C ' D ' is parallel；
Simulation supplying layer 4-3 covers three faces of 4 shell of reservoir simulation slot altogether, and three faces are parallel to fracture extension respectively
Face ABCD and face A ' B ' C ' D ' on direction, and positioned at crack distal end and perpendicular to the face BB ' C ' C on fracture extension direction；
Simulation fracture 4-1, simulation reservoir 4-2 and simulation supplying layer 4-3 are at longitudinal direction (point B shown in Fig. 2 to the direction point C) in reservoir simulation slot
Upper consistent with the height of reservoir simulation slot dischargeable capacity, simulation supplying layer 4-3 flow conductivity when clossing pressure is 20MPa is greater than
80D·cm.Wherein, simulation fracture 4-1 and simulation supplying layer 4-3 is made of that haydite is consolidated using epoxy resin, preparation simulation
In the raw material of crack 4-1 and simulation supplying layer 4-3, the quality of haydite is the 95%~97% of material quality, remaining is asphalt mixtures modified by epoxy resin
Rouge, the proppant in simulation fracture (4-1) are proppant used in the pressing crack construction of simulation, in simulation supplying layer (4-3)
Haydite partial size be 20/40 mesh.
As the preferred embodiment of the invention, the resistance to pressure pressure of high pressure flow container 5 is 30MPa.
As the preferred embodiment of the invention, the working pressure range of back-pressure valve 8 is 0~30MPa.
Pressure break tracer experiment method of the invention, the experimental provision of above-described embodiment carries out through the invention, including following
Step:
S1, Preparatory work of experiment
According to experimental design, simulation fracture 4-1 is made, the length of simulation fracture 4-1 is the length of 0.6 × simulation reservoir slot 4
Degree (up and down direction shown in FIG. 1 is the length direction for simulating reservoir slot 4), the landwaste of 100 mesh after crushing and screening is filled
It is between simulation fracture 4-1 and simulation supplying layer 4-3, reservoir simulation slot 4 is closed, and with simulated formation water saturation reservoir simulation
Slot 4, the pore volume for calculating reservoir simulation slot is 1000ml；
Pad of frac, fracturing fluid and displacement fluid are prepared, the sum of pad of frac, volume of fracturing fluid and displacement fluid are storage
The volume ratio of 2.0 times of layer 4 pore volume of simulated slot, pad of frac, fracturing fluid and displacement fluid is 15:80:5, i.e., before pressure break
The volume for setting liquid, fracturing fluid and displacement fluid is respectively 300ml, 1600ml, 100ml, and group of the lanthanides tracer is placed in fracturing fluid,
Its concentration in fracturing fluid is 10ppm；
Pad of frac is added into the first intermediate receptacle 3-1, fracturing fluid is added into the second intermediate receptacle 3-2, toward the
Displacement fluid is added in three intermediate receptacle 3-3；
Experimental facilities is connected according to attached drawing 1, closes all valves, electronic balance 10 is reset.
S2, fracturing fluid are pumped into
It is first turned on gas cylinder 7, the first annular seal space room of high pressure flow container 5 is full of by high pressure gas with the pressure of 8MPa, is closed
The 8th valve connected on gas cylinder 7.
Then using the second injection pump 1 with the speed of 50ml/min successively by the first intermediate receptacle 3-1 prepad fluid, the
The displacement fluid in fracturing fluid and third intermediate receptacle 3-3 in two intermediate receptacle 3-2 is injected into reservoir simulation slot 4.
S3, fracturing fluid recovery (backflow)
After being injected into reservoir simulation slot 4 to pad of frac, fracturing fluid and displacement fluid, it is first shut off the second injection pump
The outlet and 5 import of reservoir simulation slot of the 1 and first intermediate receptacle 3-1, the second intermediate receptacle 3-2 and third intermediate receptacle 3-3 it
Between valve (i.e. the 4th valve 2-4 of closing, the 5th valve 2-5 and the 6th valve 2-6)；
Then back-pressure valve 8 is pressurized 6MPa, opens the first injection pump 6 and the 7th valve 2-7, shut-off valve 2-9, the first injection
Simulated formation water is injected into the second airtight chamber of high pressure flow container 5 by pump 6 with 20ml/min, so that in reservoir simulation slot 4
Fluid is returned under the action of the pressure of simulated formation water and is drained into sample bottle 9.
S4, drain acquisition is returned
The fluid by returning discharge in reservoir simulation slot is acquired in sample bottle 9 with 5min/ frequency, until returning in drain
Tracer concentration is lower than 1ppm, carries out experimental record in sample collection stage, record content includes discharge speed, sample number into spectrum.
Wherein, in step S2, the injection pressure of the second injection pump 1 is higher than gas cylinder 7 and is supplied to 5 first closed chamber of high pressure flow container
The pressure of room；The pressure that gas cylinder 7 is supplied to 5 first airtight chamber of high pressure flow container in step S3 is higher than the pressure that back-pressure valve 8 is set,
And gas cylinder 7 is supplied to operating pressure (i.e. first airtight chamber of the pressure lower than injection pump 6 of 5 first airtight chamber of high pressure flow container
In gas pressure require the second airtight chamber in liquid pressure)；Simulated formation water is injected into high pressure flow container in step S3
Top (i.e. in the second airtight chamber), simulation of the remote well area to the energy supplement of near wellbore zone is realized with this, and realize
The simulation that fracturing fluid mixes and dispersed in water flooding.
Pressure break simulation by tracing experimental provision of the invention includes that fracturing fluid just squeezes system and fracturing fluid recovery (backflow) system, analog
Fracturing fluid squeezes into stratum and returning for fracturing fluid is drained through journey, has the advantages that experiential function is complete, equipment operation is easy, can meet
The requirement of the experiment simulation of pressure break tracer technique.
Claims (8)
1. a kind of pressure break simulation by tracing experimental provision, which is characterized in that including injected system, reservoir simulation slot (4), recyclable device
Outlet with the row's of returning drive system, injected system is connect with the import of reservoir simulation slot (4), and the outlet of injected system is equipped with valve
Door, injected system are used for fluid used in injection pressure break different phase, reservoir simulation slot (4) into reservoir simulation slot (4) and use
In simulation pressure break and the row of returning；
The import of reservoir simulation slot (4) is connect with recyclable device, and the entrance of recyclable device is equipped with valve, and recyclable device is for recycling
The fluid of discharge is returned from reservoir simulation slot (4)；
The row's of returning drive system includes high pressure flow container (5), the first injection pump (6) and gas cylinder (7), is equipped with inside high pressure flow container (5)
Air-tight piston；It is the first airtight chamber that Air-tight piston side is in inside high pressure flow container (5), in the Air-tight piston other side
For the second airtight chamber；The outlet of the outlet of first airtight chamber and gas cylinder (7), gas cylinder (7) is equipped with valve；Second is closed
The outlet of the outlet of chamber and the first injection pump (6) and the outlet of reservoir simulation slot (4), the first injection pump (6) is equipped with valve
Door.
2. a kind of pressure break simulation by tracing experimental provision according to claim 1, which is characterized in that injected system includes second
Injection pump (1) and several intermediate receptacles, several intermediate receptacles are parallel with one another, the outlet of the second injection pump (1) and intermediate receptacle
Entrance is connected, and the outlet of intermediate receptacle is connected with the entrance of reservoir simulation slot (4)；The entrance of intermediate receptacle is provided with valve
Door.
3. a kind of pressure break simulation by tracing experimental provision according to claim 1, which is characterized in that reservoir simulation slot (4) packet
Simulation fracture (4-1), simulation supplying layer (4-3) and simulation reservoir (4-2) for including closed shell and being set in shell, outside
Outlet and entrance is respectively set in opposite both ends on shell, exports opposite with entrance；Simulation fracture (4-1) inlet porting from shell
One end be arranged on shell outlet one end extend；
Simulate supplying layer (4-3) shape be it is U-shaped, simulation supplying layer (4-3) wing side be set on shell and simulation fracture (4-
1) on the parallel inner wall of extending direction, the bottom edge of simulation supplying layer (4-3), which is set on shell, is arranged the interior of exit end
On wall surface；
The wing Bian Pinghang of simulation fracture (4-1) and simulation supplying layer (4-3)；
Simulation reservoir (4-2) is filled in shell；
The entrance of simulation fracture (4-1) is connected to the entrance on shell.
4. a kind of pressure break simulation by tracing experimental provision according to claim 3, which is characterized in that the simulation fracture (4-
1) and the material of simulation supplying layer (4-3) is the haydite consolidated using epoxy resin, and the proppant in simulation fracture (4-1) is
Proppant used in the pressing crack construction of simulation；Simulating reservoir (4-2) is the smashed particle of earth cuttings.
5. a kind of pressure break simulation by tracing experimental provision according to claim 1, which is characterized in that the valve of recyclable device entrance
Door is valve group, and valve group includes back-pressure valve (8) and shut-off valve (2-9), and shut-off valve (2-9) and the entrance of recyclable device pass through pipe
Road connection, back-pressure valve (8) are set on the pipeline between shut-off valve (2-9) and recyclable device entrance.
6. a kind of pressure break simulation by tracing experimental provision according to claim 1, which is characterized in that recyclable device includes sample
Bottle (9) and weighing device, sample bottle (9) are set on weighing device.
7. a kind of pressure break simulation by tracing experimental method, which is characterized in that shown using pressure break as claimed in any one of claims 1 to 6
Track imitative experimental appliance carries out, and includes the following steps:
S1: simulated formation water saturation reservoir simulation slot (4) is used；The valve for closing injected system outlet, is filled into injected system
Fluid used in pressure break different phase；It opens gas cylinder (7), makes the gas for being full of preset pressure in the first airtight chamber, close
The valve of gas cylinder (7) outlet and the first injection pump (6) outlet；
S2: using injected system, successively into reservoir simulation slot (4), fluid used in injection pressure break different phase, injection are completed
Afterwards, the valve of injected system outlet is closed；
S3: the valve of valve, the first injection pump (6) and the first injection pump (6) outlet of recyclable device entrance, the first note are opened
Enter the second airtight chamber that simulated formation water is injected into high pressure flow container (5) by pump (6), so that the fluid in reservoir simulation slot (4)
It is returned and is drained into recyclable device with preset pressure under the effect of the pressure；
S4: pressure-break form is described according to the fluid recycled in recyclable device.
8. a kind of pressure break simulation by tracing experimental method according to claim 7, which is characterized in that the first closed chamber Indoor Air
The pressure of body is less than the injection pressure of injected system；The pressure of first closed chamber indoor gas is greater than the valve of recyclable device entrance
What be can be provided returns row pressure power；The pressure of first closed chamber indoor gas is less than the pressure that the first injection pump (6) provides.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114910391A (en) * | 2022-07-18 | 2022-08-16 | 西安石油大学 | Experimental device and method for evaluating multistage profile control performance of microbial cement in fractured reservoir |
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