CN105699689B - Measure the device and method of seepage flow-free flow interface fluid velocity-slip coefficient - Google Patents
Measure the device and method of seepage flow-free flow interface fluid velocity-slip coefficient Download PDFInfo
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- CN105699689B CN105699689B CN201610045053.4A CN201610045053A CN105699689B CN 105699689 B CN105699689 B CN 105699689B CN 201610045053 A CN201610045053 A CN 201610045053A CN 105699689 B CN105699689 B CN 105699689B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/26—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting optical wave
Abstract
The present invention relates to a kind of devices of measurement seepage flow free flow interface fluid velocity-slip coefficient；The device includes：Model shell, artificial sand rock, buffer dividing plate, water feeding tank, vacuum pump, liquid trap, video camera, laser emitter, wherein：Artificial sand rock is placed in the centre position in model shell, is seepage channel inside artificial sand rock, and the cavity between artificial sand rock top and model shell forms free flow channel；Buffer dividing plate plays buffering injection fluid matasomatism so that injection fluid is uniformly pushed ahead；Laser Doppler Velocimeter is made of laser emitter and frame of axes, is obtained from by circulation road fluid flow information by laser acquisition.Experimental provision of the present invention is simple in structure, it is convenient to lay, the velocity-slip condition on seepage flow free flow coupling interface can be accurately built according to experimental result, coupled problem to study pure fluid zone and the flowing of porous media area fluid provides technical basis and support, provides fundamental basis further to carry out flow numerical simulation.
Description
Technical field
The invention belongs to petroleum works fields, and in particular, to one kind is oozed based on Laser Doppler Velocimeter (LDA) measurement
The device and method of stream-free flow interface fluid velocity-slip coefficient.
Background technology
Fractured-cavernous carbonate reservoir reservoir space type is various, and large-scale solution cavity, crack and basement rock hole are simultaneously deposited, and ruler
It is big to spend variation range, fluid flowing law is complicated in oil reservoir, in the larger crack of large-scale solution cavity and scale, fluids free flow
It is dynamic, and in the smaller crack of basement rock and scale, fluid is flowed in a manner of seepage flow, therefore such oil reservoir has seepage flow, free flow
The feature of coupling.It is found in the research of seepage flow-free flow Coupled Flow, speed of the free flow region on interface is tangentially divided
Amount is significantly greater than the tangential component in porous media area, it is thus regarded that speed is discontinuous at macroscopical interface of the two.
Earliest experiment is Gordon (Gordon.S.Beavers) and Denier (Daniel D.Joseph) in single-phase flow
On the basis of [Beavers GS, the Joseph DD.Boundary conditions at a naturally permeable that do
wall[J].J Fluid Mech 1967,30(1):197-207], by experiment, they prove, compared with non-slip condition, examine
Free flow region flow velocity and flow are all increased after worry velocity-slip, and propose velocity-slip theory on this basis, are given
The semiempirical expression formula for having gone out velocity-slip is to determine boundary there are a nondimensional velocity-slip factor alpha in the expression formula
Velocity-slip condition on face, the key parameter of further seepage coupling and free flow, it is believed that its value is only related with interfacial structure, with
Fluid properties are unrelated.But it is constrained to experiment condition at that time, is unable to measure the exact value of interface upper fluid speed.1997,
Advani[Gupte S,Advani S.Flow near the permeable boundary of a porous medium:
An experimental investigation using LDA[J].Experiments in fluids 1997,22(5):
408-422；Gupte SK,Advani SG.Flow near the permeable boundary of an aligned
fiber preform:An experimental investigation using laser doppler anemometry
[J].Polymer composites1997,18(1):114-124] it is measured for the first time using laser Doppler vibration (LDA)
Sliding velocity on interface, but they to slip coefficient further study and calculate.Beavers[Beavers
GS,Sparrow EM,Magnuson RA.Experiments on coupled parallel flows in a channel
and a bounding porous medium[J].Journal of Basic Engineering1970,92:843]、
Richardson[Richardson S.A model for the boundary condition of a porous
material.Part 2[J].J Fluid Mech 1971,49(2):327-336]、Goyeau[Goyeau B,Lhuillier
D,Gobin D,Velarde M.Momentum transport at a fluid–porous interface[J]
.International Journal of Heat and Mass Transfer 2003,46(21):4071-4081] et al. pair
How to determine that the value of α has done correlative study, it is intended to establish and show expression formula, but come to nothing so far, therefore the value master of α at present
Experiment is relied on to determine.
The present invention determines the slip coefficient from experimental viewpoint, and reliability and accuracy are stronger, and the country there are no class at present
Like the report of measurement experiment.
Invention content
To overcome defect of the existing technology, the present invention to provide a kind of based on Laser Doppler Velocimeter (LDA) measurement
The device and method of seepage flow-free flow coupled interface fluid velocity slip coefficient measures seepage flow-by Laser Doppler Velocimeter
Free flow region flow velocity is distributed in the single-phase Coupled Flow system of free flow, then according to Gordon (Gordon.S.Beavers) and pellet
The velocity-slip formula that Neil (Daniel D.Joseph) proposes calculates slip coefficient.
To achieve the above object, the present invention uses following proposal：
The device of seepage flow-free flow interface fluid velocity-slip coefficient is measured, including：Model shell, artificial sand rock, buffering
Partition board, water feeding tank, vacuum pump, liquid trap, video camera, laser emitter, wherein：Artificial sand rock is placed in the centre in model shell
Position；It is model housing entry end that model shell, which injects fluid end, and discharge fluid end is model housing outlet end；Fluid flows into end
For artificial sand rock arrival end, sandstone outlet end is made in the behaviour of fluid outflow end；It is seepage channel, artificial sand rock top inside artificial sand rock
Cavity between portion and model shell forms free flow channel；First pressure-measuring pipe, the second pressure-measuring pipe are respectively placed in artificial
The arrival end of sandstone and outlet end, the barometric gradient for measuring fluid between both ends；The buffer dividing plate is placed in outside model
Among shell arrival end and artificial sand rock arrival end；The water feeding tank, vacuum pump pass through respectively injects liquid pipe line and control pump line line
It is connected with model housing entry end, injects on liquid pipe line and control pump line line and injection hydraulic control valve door, control pump valve are installed respectively；Institute
The liquid trap stated is connected by Produced Liquid pipeline with model housing outlet end, and Produced Liquid control valve is installed on Produced Liquid pipeline；
The Laser Doppler Velocimeter is made of laser emitter and frame of axes；Frame of axes is fixed in the horizontal plane, on frame of axes
Laser emitter is installed；The video camera is fixed on frame of axes.
Compared with the existing technology, the present invention has the advantages that：Experimental provision is simple in structure, laying is convenient, according to
Experimental result can accurately build the velocity-slip condition on seepage flow-free flow coupling interface, to improve seepage flow-free flow coupling
Mathematical model is closed, the coupled problem to study pure fluid zone and the flowing of porous media area fluid provides technical basis and support, is
It further carries out flow numerical simulation to provide fundamental basis, assist in researcher's understanding and probes into fracture-cavity type carbonate oil
The flow mechanism of fluid in Tibetan.
Description of the drawings
Fig. 1 is the experimental provision schematic diagram for measuring seepage flow-free flow coupled interface fluid velocity slip coefficient；
In figure：1, model shell；2, artificial sand rock；3, the first pressure-measuring pipe；4, the second pressure-measuring pipe；5, buffer dividing plate；6, it supplies
Water tank；61, hydraulic control valve door is injected；7, pressure gauge；71, pressure gage valve；8, vacuum pump；81, pump valve is controlled；9, liquid trap；
91, Produced Liquid control valve；10, video camera；11, laser emitter；12, frame of axes.
Specific implementation mode
As shown in Figure 1, the device of seepage flow-free flow interface fluid velocity-slip coefficient is measured, including：Model shell 1, people
Sandstone 2, buffer dividing plate 5, water feeding tank 6, vacuum pump 8, liquid trap 9, video camera 10, laser emitter 11 are made, wherein：
The model shell 1 is formed by six pieces of poly (methyl methacrylate) plates by sealing glue sticking, and the artificial sand rock 2 is by equal
Even gravel combination epoxy resin compacting is cementing to be made, and artificial sand rock 2 is placed in the centre position in model shell 1；Artificial sand
The length of rock 2 is the 1/3 of model, width is identical as model, is highly the 1/2 of model, and artificial sand rock 2 is for simulating porous Jie
Matter；Model shell 1 provides the flowing space for fluid, wherein injection fluid end is 1 arrival end of model shell, discharge fluid end is mould
1 outlet end of type shell；It is 2 arrival end of artificial sand rock that fluid, which flows into end, and 2 outlet end of sandstone is made in the behaviour of fluid outflow end；Artificial sand
2 inside of rock is seepage channel, and the cavity between 2 top of artificial sand rock and model shell forms free flow channel.
First pressure-measuring pipe 3, the second pressure-measuring pipe 4 are respectively placed in arrival end and the outlet end of artificial sand rock 2, for surveying
The barometric gradient of fluid between amount both ends.
The buffer dividing plate 5 is placed among 2 arrival end of 1 arrival end of model shell and artificial sand rock, plays buffering injection
Fluid matasomatism so that injection fluid is uniformly pushed ahead.
The water feeding tank 6, vacuum pump 8 pass through respectively injects liquid pipe line and control pump line line and 1 arrival end phase of model shell
Even, it injects on liquid pipe line and control pump line line and injection hydraulic control valve door 61, control pump valve 81 is installed respectively.
The liquid trap 9 is connected by Produced Liquid pipeline with 1 outlet end of model shell, for collecting experimental waste liquid, and
Produced Liquid control valve 91 is installed on Produced Liquid pipeline.
The Laser Doppler Velocimeter is made of laser emitter 11 and frame of axes 12；Frame of axes 12 is fixed on level
Laser emitter 11 is installed on face, on frame of axes is used as measuring probe, laser emitter that can be controlled on frame of axes by computer
It horizontally or vertically moves, is obtained from by circulation road fluid flow information by laser acquisition, the data after acquisition process return
Fluid flow rate is analyzed and obtained to terminal, and free flow channel difference position is obtained finally by the movement of laser emitter
The fluid flow rate at the place of setting simultaneously draws real-time flow rate distribution map.
The video camera 10 is fixed on frame of axes 12, for recording process fluid flow.
The experimental method for measuring seepage flow-free flow coupled interface fluid velocity slip coefficient, certainly using above-mentioned measurement seepage flow-
By the experimental provision of stream coupled interface fluid velocity slip coefficient, steps are as follows：
Step 1：Experimental field is arranged
Transparent organic glass is packaged into cuboid hollow mould shell using epoxide-resin glue；By gravel epoxy resin
Glue is consolidated into rectangular artificial sandstone, measures artificial sand rock length L and permeability k, is then locked in see-through model shell
It is interior；Measure distance, i.e. free flow region height h between artificial sand rock upper surface and model cover top portion；
Step 2：Formulated fluids
Experimental Flowing Object is distilled water, is added suitable trace particle in distilled water, the viscosity, mu of measurement experiment fluid, so
Prepared fluid is added in water feeding tank 6 afterwards；
Step 3：Model vacuumizes saturation experiments fluid
Injection hydraulic control valve door 61, output hydraulic control valve door 91 are closed, pressure gage valve 71, control pump valve 81 and true are opened
Sky pump 8, experimental model is vacuumized；When 7 numerical value of pressure gauge drops to 1 × 10-2When Pa, pressure gage valve 71, control pump valve are closed
Door 81, vacuum pump 8 open injection hydraulic control valve door 61；After fully saturated distilled water in model shell 1 and artificial sand rock 2, close
Close injection hydraulic control valve door 61；
Step 4：Measure interface flow velocity
Laser Doppler Velocimeter is opened, relevant parameter is set and adjusts laser emitter, makes the lucky position of laser cross-over
Among 2 upper surface of artificial sand rock；Open injection hydraulic control valve door 61, output hydraulic control valve door 91, wait for fluid stream dynamic stability and
After laser measurement signal is normal, along being parallel to the fluid flow rate at the orientation measurement different location of interface and being averaged, to obtain
Sliding velocity u on to interfaceB；Read the pressure value P of pressure-measuring pipe 31, pressure pipe 4 pressure value P2, to acquire barometric gradient
Δ P=(P1-P2)/L, wherein L are 2 length of artificial sand rock；
Step 5：Calculating speed slip coefficient
According to porous media permeability, fluid viscosity, free flow channel height and the piezometric pressure value measured, profit
Slip coefficient α is calculated with Beavers-Joseph velocity-slip formula：
In formula, α is slip coefficient, and k is porous media permeability, and h is free flow region height, and μ is fluid viscosity, uB
For the sliding velocity on interface.
Claims (3)
1. a kind of device measuring seepage flow-free flow interface fluid velocity-slip coefficient, including：Model shell, delays artificial sand rock
Rush partition board, water feeding tank, vacuum pump, liquid trap, video camera, laser emitter, it is characterised in that：The model shell is by six pieces
Poly (methyl methacrylate) plate is formed by sealing glue sticking, and artificial sand rock sealing is in the centre position in model shell, the artificial sand
Rock is made by the compacting of uniform gravel coupling collar oxygen resin is cementing, and artificial sand rock is for simulating porous media；In artificial sand rock
Portion is seepage channel, is carried for fluid the cavity formation free flow channel between model shell, model shell at the top of artificial sand rock
For the flowing space, wherein injection fluid end is model housing entry end, discharge fluid end is model housing outlet end；Fluid flows into
End is artificial sand rock arrival end, and sandstone outlet end is made in the behaviour of fluid outflow end；First pressure-measuring pipe, the second pressure-measuring pipe are respectively placed in people
Make arrival end and the outlet end of sandstone；The buffer dividing plate is placed among model housing entry end and artificial sand rock arrival end,
The water feeding tank, vacuum pump are connected by injecting liquid pipe line and control pump line line with model housing entry end respectively, injection liquid pipe
Hydraulic control valve door, control pump valve are injected in installation respectively on line and control pump line line；The liquid trap passes through Produced Liquid pipeline and mould
Type housing outlet end is connected, and Produced Liquid control valve is installed on Produced Liquid pipeline；Laser Doppler Velocimeter is by laser emitter
And frame of axes is constituted；Frame of axes is fixed in the horizontal plane, and laser emitter is installed on frame of axes；The video camera is fixed on seat
On frame；Prepared Experimental Flowing Object is equipped in water feeding tank, Experimental Flowing Object is the distilled water that suitable trace particle is added.
2. the device according to claim 1 for measuring seepage flow-free flow interface fluid velocity-slip coefficient, feature exist
In：The length of artificial sand rock is the 1/3 of model, width is identical as model, is highly the 1/2 of model.
3. a kind of experimental method measuring seepage flow-free flow interface fluid velocity-slip coefficient, using one of claim 1-2 institutes
The experimental provision for the measurement seepage flow-free flow interface fluid velocity-slip coefficient stated, which is characterized in that steps are as follows：
Step 1：Experimental field is arranged
Transparent organic glass is packaged into cuboid hollow mould shell using epoxide-resin glue；Gravel epoxide-resin glue is consolidated
Form rectangular artificial sandstone, measures artificial sand rock length L and permeability k, be then locked in see-through model shell；It surveys
Measure distance, i.e. free flow region height h between artificial sand rock upper surface and model cover top portion；
Step 2：Formulated fluids
Experimental Flowing Object is distilled water, and suitable trace particle is added in distilled water, then the viscosity, mu of measurement experiment fluid will
Prepared fluid is added in water feeding tank；
Step 3：Model vacuumizes saturation experiments fluid
Injection hydraulic control valve door, output hydraulic control valve door are closed, pressure gage valve, control pump valve and vacuum pump is opened, will test
Model vacuumizes；When pressure gauge numerical value drops to 1 × 10-2When Pa, pressure gage valve, control pump valve, vacuum pump are closed, note is opened
Enter hydraulic control valve door；After fully saturated distilled water in model shell and artificial sand rock, injection hydraulic control valve door is closed；
Step 4：Measure interface flow velocity
Laser Doppler Velocimeter is opened, relevant parameter is set and adjusts laser emitter, laser cross-over is made to be located exactly at people
It makes among sandstone upper surface；Injection hydraulic control valve door, output hydraulic control valve door are opened, fluid stream dynamic stability is waited for and laser measurement is believed
After number normal, along being parallel to the fluid flow rate at the orientation measurement different location of interface and being averaged, to obtain on interface
Sliding velocity uB；Read the pressure value P of pressure-measuring pipe1, pressure pipe 4 pressure value P2, to acquire barometric gradient Δ P=(P1-P2)/
L, wherein L are artificial sand rock length；
Step 5：Calculating speed slip coefficient
According to porous media permeability, fluid viscosity, free flow channel height and the piezometric pressure value measured, calculates and slide
Move factor alpha：
In formula, α is slip coefficient, and k is porous media permeability, and h is free flow region height, and μ is fluid viscosity, uBFor boundary
Sliding velocity on face.
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| CN109444020B (en) * | 2018-12-17 | 2021-02-02 | 武汉理工大学 | Rock mass fracture seepage microscopic feature observation equipment and observation method based on 3D printing technology |
| CN111721962B (en) * | 2020-07-17 | 2021-05-14 | 厦门大学 | Flow velocity measuring method based on Magnus effect |
| CN111982754A (en) * | 2020-08-07 | 2020-11-24 | 武汉理工大学 | Bubble curtain multipurpose experiment table device and experiment method thereof |
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