CN105715239B - Visualize nanometer magnetofluid tablet oil displacement experiment device and experimental method - Google Patents
Visualize nanometer magnetofluid tablet oil displacement experiment device and experimental method Download PDFInfo
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- CN105715239B CN105715239B CN201610045033.7A CN201610045033A CN105715239B CN 105715239 B CN105715239 B CN 105715239B CN 201610045033 A CN201610045033 A CN 201610045033A CN 105715239 B CN105715239 B CN 105715239B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
Abstract
The present invention relates to a kind of visualization nanometer magnetofluid tablet oil displacement experiment device and experimental methods.Nanometer magnetofluid tablet oil displacement experiment device is visualized, including：Intermediate receptacle, back-up sand tablet, tablet clamper, magnetic field generator, injection end pressure gauge, production end pressure gauge, fluid meter, vacuum pump, back-up sand tablet is fixed by tablet clamper, and different location jewel hole and set go up rubber tube and be used for simulating well point on back-up sand tablet；Intermediate receptacle is connected by displacing fluid feed-line with back-up sand tablet injection end, and fluid meter and vacuum pump are connected by Produced Liquid feed-line with back-up sand tablet production end；Magnetic field generator is arranged in back-up sand tablet surrounding.Experimental provision provided by the invention is simple in structure, it is convenient to lay, different heterogeneity feature porous media oil displacement process can be simulated, experimentation and result can provide reliable technical basis for the oil field implementation nanometer magnetofluid displacement of reservoir oil, further Remaining Oil, have certain guidance and reference.
Description
Technical field
The invention belongs to petroleum works fields, and in particular, to a kind of visualization nanometer magnetofluid tablet oil displacement experiment dress
It sets and experimental method.
Background technology
The most effective and most widely used method that waterflooding extraction is to maintain strata pressure, improves oil recovery factor.But by
" predominant pathway " and oil reservoir complicated geological factor between long-term injecting water washes away the injection-production well to be formed to inject water not
Can it is anticipated that the flowing of displacement path, lead to involve that range is small, displacement efficiency is low, crude oil development degree is low and water filling is opened
Send out an important factor in order of later stage oil well High water cut.How to further increase recovery ratio and has become problem urgently to be resolved hurrily.
It includes thermal methods, chemical method, inflating method and microbial method etc., mechanism of oil displacement to improve recovery ratio method both at home and abroad at present
It predominantly reduces displacing fluid and involves range, displacement efficiency, but above method with crude oil mobility ratio, interfacial tension to improve displacement
It can not effectively solve the problems, such as that the factors such as Reservoir Heterogeneity, complicated structure cause displacement efficiency low.
Nanometer magnetofluid is a kind of new function material, the not only mobility with liquid but also the magnetic with solid magnetic material
Property, ferrofluid flow behavior can be controlled by externally-applied magnetic field, just because of this, had a wide range of applications in practice, such as
Magnet fluid sealing, lubrication, ore dressing, medical instrument, acousto-optic adjusting etc..Foreign scholar asks for nanometer magnetofluid porous media flows
Topic has carried out experimental study (Borglin S., Moridis G., Oldenburg C.Experimental Studies of
the Flow of Ferrofluid in Porous Media[J].Transport in Porous Media,2000,41
(1):61-80.), the results showed that can be with the flow direction of oriented control nanometer magnetofluid using magnetic field.Based on the conclusion, research
Personnel propose, using nanometer magnetofluid as displacing fluid, to change oil displacement direction and speed by magnetic field, improve displacement sweep efficiency, from
And improve the thought (method and its well pattern of the village Wu Yongbin, Wang Hong nanometer magnetofluid displacements exploitation oil reservoir of oil deposil erude petroleum recovery ratio
Structure:China, CN103334724A [P]).
Invention content
At present there is no the case history of nanometer magnetofluid displacement exploitation oil reservoir, in order to verify the effect of the technology and feasible
Property and provide guidance for site operation and use for reference, the present invention provides a kind of visualization nanometer magnetofluid tablet oil displacement experiment device and
Experimental method.
To achieve the above object, the present invention uses following proposal：
Nanometer magnetofluid tablet oil displacement experiment device is visualized, including：Oil storage intermediate receptacle, water storage intermediate receptacle, Chu Na
Rice magnetic fluid intermediate receptacle, back-up sand tablet, tablet clamper, magnetic field generator, injection end pressure gauge, production end pressure gauge, stream
Fluid meter, vacuum pump, it is characterised in that：Different location jewel hole and set go up rubber tube and are used for simulating well point on back-up sand tablet,
Back-up sand tablet is fixed by tablet clamper, oil storage intermediate receptacle, water storage intermediate receptacle, storage nanometer magnetofluid intermediate receptacle respectively with
Displacing fluid feed-line is connected, and displacing fluid feed-line is connected with back-up sand tablet injection end；The fluid meter and vacuum
Pump is connected with Produced Liquid feed-line respectively, and Produced Liquid feed-line is connected with back-up sand tablet production end；The injection side pressure
Power table is placed in displacing fluid feed-line, measures back-up sand tablet and injects end pressure；The production end pressure gauge is placed in extraction
Liquid feed-line measures back-up sand tablet and produces end pressure；The magnetic field generator is arranged in back-up sand tablet surrounding.
Compared with the existing technology, the present invention has the advantages that：
1, displacement test in the case of different heterogeneity medium can be considered by making different back-up sand flat plate model, and
Different injection production well arrangements can be considered, in addition, progress plane and longitudinal displacement test can be facilitated to cut by adjusting tablet clamper
It changes.
2, displacement is visualized, can be with real-time dynamic monitoring displacing front position, and is obtained by Computer Image Processing
Involve range to different moments displacement.
3, it can in real time be adjusted according to displacement state taking human as different externally-applied magnetic fields are applied by arranging and adjusting magnetic field generator
The displacement path of whole nanometer magnetofluid, displacement velocity.
4, experimental provision is simple in structure, laying is convenient, experimentation and result can be oil field implement the nanometer magnetofluid displacement of reservoir oil,
Further Remaining Oil provides reliable technical basis, has certain guidance and reference.
Description of the drawings
Fig. 1 is visual nanometer magnetofluid tablet oil displacement experiment schematic device；
Fig. 2 is plain heterogeneity back-up sand flat plate model schematic diagram；
Fig. 3 is vertical heterogeneity back-up sand flat plate model schematic diagram；
In figure, 1, oil storage intermediate receptacle；11, oil-control valve；2, water storage intermediate receptacle；21, water control valve；3, nano magnetic is stored up
Fluid intermediate receptacle；31, nanometer magnetofluid valve is controlled；4, back-up sand tablet；5, tablet clamper；6, magnetic field generator；7, it injects
End pressure table；71, injection end pressure gage valve；8, production end pressure gauge；81, production end pressure gage valve；9, fluid meter；
91, Produced Liquid control valve；10, vacuum pump；101, pump valve is controlled.
Specific implementation mode
As shown in Figure 1, visualization nanometer magnetofluid tablet oil displacement experiment device, including：In oil storage intermediate receptacle 1, water storage
Between container 2, storage nanometer magnetofluid intermediate receptacle 3, back-up sand tablet 4, tablet clamper 5, magnetic field generator 6, injection end pressure gauge
7, production end pressure gauge 8, fluid meter 9, vacuum pump 10, wherein：
Experiment kerosene is stored in the oil storage intermediate receptacle 1, for identification using tonyred color matching；Hold among water storage
Water is stored in device 2, for identification using methyl blue color matching；Store up storage nano magnetic fluid in nanometer magnetofluid intermediate receptacle 3, nanometer
Magnetic fluid is stable colloidal liquid, is mixed by the magnetic retention particle, base load liquid and dispersant three of a diameter of nanometer scale
It forms.
The back-up sand tablet 4 is made of panel housings and internal artificial sand rock, and wherein panel housings are by 6 pieces of organic glasses
Plate is glued, and inside filling artificial sand rock, artificial sand rock is compacted by glass sand, epoxy gluing, by adjusting glass
Glass Grains number, glass sand and the weight ratio of epoxy resin can obtain different permeabilities, porosity porous media model；
Different location jewel hole and set go up rubber tube and are used for simulating well point on back-up sand tablet 4, and it is real that different well pattern model displacements may be implemented
It tests.It is respectively the plane and vertical heterogeneity back-up sand tablet of experimental design shown in Fig. 2, Fig. 3.
Back-up sand tablet 4 is fixed by tablet clamper 5, can easily be carried out plane by Rotating Plates clamper 5 and be indulged
Switch to displacement test.
Oil storage intermediate receptacle 1, water storage intermediate receptacle 2, storage nanometer magnetofluid intermediate receptacle 3 pass through displacing fluid delivery pipe respectively
Line is connected with 4 injection end of back-up sand tablet；The fluid meter 9 and vacuum pump 10 is connected with Produced Liquid feed-line respectively,
Produced Liquid feed-line is connected with 4 production end of back-up sand tablet；The injection end pressure gauge 7 is placed in displacing fluid feed-line,
It measures back-up sand tablet 4 and injects end pressure；The production end pressure gauge 8 is placed in Produced Liquid feed-line, measures back-up sand tablet 4
Produce end pressure.
The magnetic field generator 6 is arranged in 4 surrounding of back-up sand tablet, and high magnetic induction intensity is generated using electromagnetic induction,
And magnetic field size can be controlled by adjusting size of current.
The fluid meter 9 is for measuring production end fluid volume.
The vacuum pump 10 facilitates 4 original state saturated oils of back-up sand tablet for vacuumizing back-up sand tablet 4.
High-pressure plunger pump by pumping line respectively with oil storage intermediate receptacle 1, water storage intermediate receptacle 2, storage nanometer magnetofluid
Intermediate receptacle 3 is connected；High-pressure plunger pump is capable of providing the infusion modes such as constant current/constant voltage.
As an improvement, shooting entire displacement process using video camera, and computer is sent data to, passes through image procossing
Analysis can obtain different moments displacement and involve range.
As an improvement, back-up sand flat plate model of the present invention is not limited to shown in Fig. 2, Fig. 3, it can be according to the rock of different oil reservoirs
Stone, geologic feature make, so that flat plate model more tallies with the actual situation.
Visualization nanometer magnetofluid tablet oil displacement experiment method is as follows using above-mentioned experimental provision：
Step 1：Back-up sand flat panel production
According to as shown in Figure 2,3, plane and vertical heterogeneity back-up sand tablet are made using different meshes glass sand, wherein high
The filling of 60 glass sand of region mesh number is oozed, hypotonic region is filled with 80 glass sand of mesh number；Hypertonic region permeability is obtained through measuring
13.77×10-12m2, porosity 0.38, hypotonic region permeability 1.38 × 10-12m2, porosity 0.27, plain heterogeneity back-up sand
Tablet average pore 0.28, vertical heterogeneity back-up sand tablet average pore 0.33；
Step 2：Back-up sand tablet vacuumizes
Back-up sand tablet 4 is placed in tablet clamper 5, oil-control valve 11, water control valve 21, control nanometer magnetofluid are closed
Valve 31, injection end pressure gage valve 71 and Produced Liquid control valve 91 open production end pressure gage valve 81, control pump valve
101 and vacuum pump 10, back-up sand tablet 4 is vacuumized；When 8 pressure value of production end pressure gauge drops to 1 × 10-2When Pa, close
Production end pressure gage valve 81, control pump valve 101 and vacuum pump 10.
Step 3：The initial saturated oils of back-up sand tablet
Open high-pressure plunger pump, oil-control valve 11 so that oil enters and is saturated back-up sand tablet 4；When oil is uniformly distributed back-up sand
After tablet, high-pressure plunger pump, oil-control valve 11 are closed.
Step 4：Water drive oil process
It opens video camera and records displacement process in real time, and video data is transmitted to computer；Open high-pressure plunger pump simultaneously
Constant pressure or top-up injection pattern are set, water control valve 21 and injection end pressure gage valve 71 are opened, opens Produced Liquid control valve
91 and production end pressure gage valve 81；Oil, water volume in different moments Produced Liquid, record injection are recorded by fluid meter 9
End pressure table 7,8 pressure value of production end pressure gauge.When production end fluid not oil-containing, close high-pressure plunger pump, water control valve 21,
Injection end pressure gage valve 71, production end pressure gage valve 81 and Produced Liquid control valve 91.
Step 5：Nanometer magnetofluid oil displacement process under magnetic fields
It opens high-pressure plunger pump and sets constant pressure or top-up injection pattern, open control nanometer magnetofluid valve 31 and and injection
End pressure meter valve 71 opens Produced Liquid control valve 91 and production end pressure gage valve 81；It opens magnetic field generator 6 and sets
Initial magnetic field size；Oil, nanometer magnetofluid volume in different moments Produced Liquid are recorded by fluid meter 9, records injection end
8 pressure value of pressure gauge 7 and production end production end.When production end fluid not oil-containing, high-pressure plunger pump, control nanometer magnetofluid are closed
Valve 31, injection end pressure gage valve 71, production end pressure gage valve 81 and Produced Liquid control valve 91.
Step 6：Parameters sensitivity analysis
Step 1 is repeated to step 5, oil displacement experiment is carried out to the identical back-up sand tablet of multiple models respectively；In the multiple displacement of reservoir oil
In dynamic simulation experiment, change the injection pressure of high-pressure plunger pump or the magnetic field size of injection rate, the generation of magnetic field generator 6,
And point multiple time points record the relevant parameter in experimentation.
Step 7：Data processing
The conventional Calculation Method of based on crude recovery ratio, the reality recorded in step 1, step 4, step 5 and step 6
Test data, you can obtain the oil recovery factor under different experiments operating mode；In addition, carrying out image to shooting displacement process video data
Processing, can obtain real-time displacement and involve range.
Reflect as an improvement, can be made according to the glass sand of different reservoir geologic character combination different meshes in step 1
Practical oil reservoir Heterogeneous Characteristics back-up sand tablet 4 so that experimental result is more of practical significance.
As an improvement, after placing back-up sand tablet 4, it can be facilitated by adjusting tablet clamper 6 and carry out plane and indulge
To back-up sand tablet oil displacement experiment.
It is flat to plane shown in Fig. 2,3 and vertical heterogeneity back-up sand using experimental provision described in the present invention and method
Plate carries out conventional water drive oil first, after not replacing the nanometer magnetofluid displacement of reservoir oil after oil-containing in Produced Liquid.It arrives from the experimental results：For
Heterogeneous reservoir causes to involve the problem that range is small, displacement efficiency is low using traditional water drive, and recovery ratio is only 40% or so；When
After replacing the nanometer magnetofluid displacement of reservoir oil, in the case where magnetic field controls, nanometer magnetofluid is improved to the low hypotonic region displacement of range is involved
Displacing fluid involves range, can also improve 20%-30% recovery ratios again after water drive.
Claims (3)
1. a kind of visualization nanometer magnetofluid tablet oil displacement experiment device, including：Oil storage intermediate receptacle, water storage intermediate receptacle, storage
Nanometer magnetofluid intermediate receptacle, back-up sand tablet, tablet clamper, magnetic field generator, injection end pressure gauge, production end pressure gauge,
Fluid meter, vacuum pump, it is characterised in that：Different location jewel hole and set go up rubber tube and are used for simulating well on back-up sand tablet
Point, back-up sand tablet are fixed by tablet clamper, and the oil storage intermediate receptacle, stores up among nanometer magnetofluid water storage intermediate receptacle
Container is connected with displacing fluid feed-line respectively, and displacing fluid feed-line is connected with back-up sand tablet injection end；The fluid meter
Measuring device and vacuum pump are connected with Produced Liquid feed-line respectively, and Produced Liquid feed-line is connected with back-up sand tablet production end；It is described
Injection end pressure gauge be placed in displacing fluid feed-line, measure back-up sand tablet and inject end pressure；The production end pressure gauge
It is placed in Produced Liquid feed-line, back-up sand tablet is measured and produces end pressure；The magnetic field generator is arranged in back-up sand tablet four
Week；
Entire displacement process is shot using video camera, and sends data to computer；
The back-up sand tablet is made of panel housings and internal artificial sand rock, and wherein panel housings are by six pieces of poly (methyl methacrylate) plate glue
It connects, inside filling artificial sand rock, artificial sand rock is compacted by glass sand, epoxy gluing, by adjusting glass sand
Mesh number, glass sand and the weight ratio of epoxy resin can obtain different permeabilities, porosity porous media model；
Experiment kerosene is stored in the oil storage intermediate receptacle, for identification using tonyred color matching；In water storage intermediate receptacle
Water is stored, for identification using methyl blue color matching；Store up storage nano magnetic fluid in nanometer magnetofluid intermediate receptacle, nanometer magnetofluid
It is stable colloidal liquid, is mixed by the magnetic retention particle, base load liquid and dispersant three of a diameter of nanometer scale；
High-pressure plunger pump is held among oil storage intermediate receptacle, water storage intermediate receptacle, storage nanometer magnetofluid respectively by pumping line
Device is connected；High-pressure plunger pump is capable of providing constant current/constant voltage infusion mode.
2. a kind of visualization nanometer magnetofluid tablet oil displacement experiment method, using experimental provision described in claim 1, feature
It is, is as follows：
Step 1：Back-up sand flat panel production
Plane and vertical heterogeneity back-up sand tablet are made using different meshes glass sand；
Step 2：Back-up sand tablet vacuumizes
Back-up sand tablet is placed in tablet clamper, oil-control valve, water control valve, control nanometer magnetofluid valve, injection are closed
End pressure meter valve and Produced Liquid control valve open production end pressure gage valve, control pump valve and vacuum pump, to back-up sand tablet
It vacuumizes；When production end gage pressure numerical value drops to 1 × 10-2When Pa, close production end pressure gage valve, control pump valve and
Vacuum pump；
Step 3：The initial saturated oils of back-up sand tablet
Open high-pressure plunger pump, oil-control valve so that oil enters and is saturated back-up sand tablet；After oil is uniformly distributed back-up sand tablet,
Close high-pressure plunger pump, oil-control valve；
Step 4：Water drive oil process
It opens video camera and records displacement process in real time, and video data is transmitted to computer；It opens high-pressure plunger pump and sets
Constant pressure or top-up injection pattern open water control valve and injection end pressure gage valve, open Produced Liquid control valve and production end
Pressure gage valve；Oil, water volume in different moments Produced Liquid, record injection end pressure gauge, extraction are recorded by fluid meter
End pressure gauge pressure values；When production end fluid not oil-containing, close high-pressure plunger pump, water control valve, injection end pressure gage valve,
Production end pressure gage valve and Produced Liquid control valve；
Step 5：Nanometer magnetofluid oil displacement process under magnetic fields
It opens high-pressure plunger pump and sets constant pressure or top-up injection pattern, open control nanometer magnetofluid valve and injection end pressure gauge
Valve opens Produced Liquid control valve and production end pressure gage valve；It opens magnetic field generator and sets initial magnetic field size；It is logical
Oil, nanometer magnetofluid volume in fluid meter record different moments Produced Liquid are crossed, injection end pressure gauge is recorded and production end is adopted
Outlet pressure value；When production end fluid not oil-containing, high-pressure plunger pump, control nanometer magnetofluid valve, injection end pressure gauge are closed
Valve, production end pressure gage valve and Produced Liquid control valve；
Step 6：Parameters sensitivity analysis
Step 1 is repeated to step 5, oil displacement experiment is carried out to the identical back-up sand tablet of multiple models respectively；In multiple displacement of reservoir oil dynamic
In simulated experiment, change the injection pressure of high-pressure plunger pump or the magnetic field size of injection rate, magnetic field generator generation, and divide more
A time point records the relevant parameter in experimentation；
Step 7：Data processing
The conventional Calculation Method of based on crude recovery ratio, the experiment number recorded in step 1, step 4, step 5 and step 6
According to obtaining the oil recovery factor under different experiments operating mode.
3. visualization nanometer magnetofluid tablet oil displacement experiment method according to claim 2, which is characterized in that driven to shooting
Image procossing is carried out for process video data, real-time displacement is obtained and involves range.
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