CN105715239A - Visual nanometer magnetofluid panel oil displacement experiment device and experiment method - Google Patents
Visual nanometer magnetofluid panel oil displacement experiment device and experiment method Download PDFInfo
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- CN105715239A CN105715239A CN201610045033.7A CN201610045033A CN105715239A CN 105715239 A CN105715239 A CN 105715239A CN 201610045033 A CN201610045033 A CN 201610045033A CN 105715239 A CN105715239 A CN 105715239A
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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 invention relates to a visual nanometer magnetofluid panel oil displacement experiment device and an experiment method.The visual nanometer magnetofluid panel oil displacement experiment device comprises a middle container, a sand filling panel, a panel holder, magnetic field generators, an injection end pressure gauge, a withdrawal end pressure gauge, a fluid counter and a vacuum pump.The sand filling panel is fixed through the panel holder, drilling is conducted at different positions on the sand filling panel, and rubber pipes are sleeved with drilled holes to simulate well points.The middle container is connected with the injection end of the sand filling panel through a displacement liquid conveying pipeline, the fluid counter and the vacuum pump are connected with the withdrawal end of the sand filling panel through a withdrawal liquid conveying pipeline, and the magnetic field generators are arranged around the sand filling panel.The experiment device is simple in structure, convenient to arrange and capable of simulating the porous medium oil displacement process of different heterogeneous characters, and the experiment process and result can provide a reliable technical basis for oil fields to implement nanometer magnetofluid oil displacement and further excavate potentials of remaining oil, and have certain guidance and reference significance.
Description
Technical field
The invention belongs to petroleum works field, in particular it relates to a kind of visualization nanometer magnetofluid flat board oil displacement experiment device and experimental technique.
Background technology
Waterflooding extraction is to maintain strata pressure, improves the most effective and most widely used method of oil recovery factor.But due to long-term injecting water wash away " predominant pathway " between the injection-production well of formation and oil reservoir complicated geological factor make to inject water fail to it is anticipated that the flowing of displacement path, cause involving that scope is little, displacement efficiency is low, crude oil development degree is low, be also an important factor in order of waterflooding extraction later stage oil well High water cut.How to improve the difficult problem that recovery ratio has become urgently to be resolved hurrily further.Improve recovery ratio method at present both at home and abroad and include thermal methods, chemical method, inflating method and microbial method etc., its mechanism of oil displacement is mainly reduction displacing fluid and involves scope, displacement efficiency with crude oil mobility ratio, interfacial tension thus improving displacement, but above method can not effectively solve the problem that the factor such as Reservoir Heterogeneity, complicated structure causes displacement efficiency low.
Nanometer magnetofluid is a kind of new function material, not only there is the mobility of liquid but also there is the magnetic of solid magnetic material, ferrofluid flow behavior can be controlled by externally-applied magnetic field, just because of this, have a wide range of applications in practice, such as magnet fluid sealing, lubrication, ore dressing, medical apparatus and instruments, acousto-optic adjustment etc..Foreign scholar has carried out experimentation (BorglinS. for nanometer magnetofluid porous media flows problem, MoridisG., OldenburgC.ExperimentalStudiesoftheFlowofFerrofluidinPor ousMedia [J] .TransportinPorousMedia, 2000,41 (1): 61-80.), result shows to utilize the magnetic field can the flow direction of oriented control nanometer magnetofluid.Based on this conclusion, research worker proposes nanometer magnetofluid as displacing fluid, oil displacement direction and speed is changed by magnetic field, improve displacement sweep efficiency, thus improving the thought (Wu Yongbin of oil deposil erude petroleum recovery ratio, Wang Hongzhuan. the method for nanometer magnetofluid displacement exploitation oil reservoir and well pattern structure thereof: China, CN103334724A [P] .).
Summary of the invention
The case history of at present not nanometer magnetofluid displacement exploitation oil reservoir, in order to verify the effect of this technology and feasibility and provide to instruct for site operation and use for reference, the invention provides a kind of visualization nanometer magnetofluid flat board oil displacement experiment device and experimental technique.
For achieving the above object, the present invention adopts following proposal:
Visualization nanometer magnetofluid flat board oil displacement experiment device, including: oil storage intermediate receptacle, water storage intermediate receptacle, storage nanometer magnetofluid intermediate receptacle, back-up sand flat board, flat board clamper, magnetic field generator, injection end Pressure gauge, production end Pressure gauge, fluid meter, vacuum pump, it is characterized in that: on back-up sand flat board diverse location jewel hole and overlap on rubber tube be used for simulate well point, back-up sand flat board is fixed by flat board clamper, oil storage intermediate receptacle, water storage intermediate receptacle, storage nanometer magnetofluid intermediate receptacle is connected with displacing fluid feed-line respectively, displacing fluid feed-line is connected with back-up sand flat board injection end；Described fluid meter and vacuum pump are connected with Produced Liquid feed-line respectively, and Produced Liquid feed-line is connected with back-up sand flat board production end；Described injection end Pressure gauge is placed in displacing fluid feed-line, measures back-up sand flat board injection end pressure；Described production end Pressure gauge is placed in Produced Liquid feed-line, measures back-up sand flat board production end pressure；Described magnetic field generator is arranged in back-up sand flat board surrounding.
Relative to prior art, there is advantages that
1, displacement test in different heterogeneity medium situation can be considered by the different back-up sand flat plate model of making, and different injection production well arrangements can be considered, additionally, can conveniently carry out plane and longitudinal displacement test switching by regulating flat board clamper.
2, displacement is visualized, it is possible to real-time dynamic monitoring displacing front position, and obtains not displacement in the same time by Computer Image Processing and involve scope.
3, pass through to arrange and regulate magnetic field generator and can artificially apply different externally-applied magnetic field, adjust the displacement path of nanometer magnetofluid, displacement velocity in real time according to displacement state.
4, experimental provision simple in construction, laying facilitate, and experimentation and result can implement the nanometer magnetofluid displacement of reservoir oil, the further Remaining Oil reliable technical basis of offer for oil field, have certain guidance and reference.
Accompanying drawing explanation
Fig. 1 is visual nanometer magnetofluid flat board oil displacement experiment device schematic diagram；
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, control fuel tap door；2, water storage intermediate receptacle；21, water control valve；3, storage nanometer magnetofluid intermediate receptacle；31, control nanometer magnetofluid valve；4, back-up sand flat board；5, flat board clamper；6, magnetic field generator；7, injection end Pressure gauge；71, injection end pressure gage valve；8, production end Pressure gauge；81, production end pressure gage valve；9, fluid meter；91, Produced Liquid controls valve；10, vacuum pump；101, control pump valve.
Detailed description of the invention
As shown in Figure 1, visualization nanometer magnetofluid flat board oil displacement experiment device, including: oil storage intermediate receptacle 1, water storage intermediate receptacle 2, storage nanometer magnetofluid intermediate receptacle 3, back-up sand flat board 4, flat board clamper 5, magnetic field generator 6, injection end Pressure gauge 7, production end Pressure gauge 8, fluid meter 9, vacuum pump 10, wherein:
Described oil storage intermediate receptacle 1 stores experiment kerosene, adopts tonyred color matching to be used for identifying；Water storage intermediate receptacle 2 stores water, adopts methyl blue color matching to be used for identifying；Storage nano magnetic fluid in storage nanometer magnetofluid intermediate receptacle 3, nanometer magnetofluid is stable colloidal liquid, magnetic retention granule, base load liquid and the dispersant three that diameter is nanometer scale mix.
Described back-up sand flat board 4 is made up of panel housings and internal artificial sand rock, wherein panel housings is formed by 6 pieces of poly (methyl methacrylate) plates splicing, internal filling artificial sand rock, artificial sand rock is formed by glass sand, epoxy gluing compacting, by adjusting the porous media model that can obtain different permeability, porosity of glass Grains number, glass sand and the part by weight of epoxy resin；Diverse location jewel hole overlap rubber tube and be used for simulating well point on back-up sand flat board 4, it is possible to achieve different well pattern model displacement tests.The respectively plane of experimental design and vertical heterogeneity back-up sand flat board shown in Fig. 2, Fig. 3.
Back-up sand flat board 4 is fixed by flat board clamper 5, can be conveniently carried out plane and longitudinal displacement test switching by Rotating Plates clamper 5.
Oil storage intermediate receptacle 1, water storage intermediate receptacle 2, storage nanometer magnetofluid intermediate receptacle 3 are connected with back-up sand flat board 4 injection end respectively through displacing fluid feed-line；Described fluid meter 9 and vacuum pump 10 are connected with Produced Liquid feed-line respectively, and Produced Liquid feed-line is connected with back-up sand flat board 4 production end；Described injection end Pressure gauge 7 is placed in displacing fluid feed-line, measures back-up sand flat board 4 injection end pressure；Described production end Pressure gauge 8 is placed in Produced Liquid feed-line, measures back-up sand flat board 4 production end pressure.
Described magnetic field generator 6 is arranged in back-up sand flat board 4 surrounding, utilizes electromagnetic induction to produce high magnetic induction, and can control magnetic field size by regulating size of current.
Described fluid meter 9 is used for measuring production end fluid volume.
Described vacuum pump 10 is for by back-up sand flat board 4 evacuation, facilitating back-up sand flat board 4 original state saturated oils.
High-pressure plunger pump is connected with oil storage intermediate receptacle 1, water storage intermediate receptacle 2, storage nanometer magnetofluid intermediate receptacle 3 respectively by pumping line；High-pressure plunger pump can provide the infusion mode such as constant current/constant voltage.
As improvement, utilize video camera to shoot whole displacement process, and send data to computer, displacement in the same time can be obtained not by image processing and analyzing and involve scope.
As improvement, back-up sand flat plate model of the present invention is not limited to shown in Fig. 2, Fig. 3, it is possible to make according to the different rocks of oil reservoir, geologic feature, so that flat plate model more tallies with the actual situation.
Visualization nanometer magnetofluid flat board oil displacement experiment method, adopts above-mentioned experimental provision, specifically comprises the following steps that
Step 1: back-up sand flat panel production
According to as shown in Figure 2,3, adopting different meshes glass sand to make plane and vertical heterogeneity back-up sand flat board, wherein high permeability area territory order number 60 glass sand is filled, and hypotonic region order number 80 glass sand is filled；High permeability area territory permeability 13.77 × 10 is obtained through measuring-12m2, porosity 0.38, hypotonic region permeability 1.38 × 10-12m2, porosity 0.27, plain heterogeneity back-up sand flat board average pore 0.28, vertical heterogeneity back-up sand flat board average pore 0.33；
Step 2: back-up sand flat board evacuation
Back-up sand flat board 4 is placed in flat board clamper 5, close control fuel tap door 11, water control valve 21, control nanometer magnetofluid valve 31, injection end pressure gage valve 71 and Produced Liquid and control valve 91, open production end pressure gage valve 81, control pump valve 101 and vacuum pump 10, to back-up sand flat board 4 evacuation；When production end Pressure gauge 8 pressure value drops to 1 × 10-2During 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 flat board
Open high-pressure plunger pump, control fuel tap door 11 so that oil enters and saturated back-up sand flat board 4；After oil is uniformly distributed back-up sand flat board, close high-pressure plunger pump, control fuel tap door 11.
Step 4: water drive oil process
Open video camera real time record displacement process, and by video data transmission to computer；Open high-pressure plunger pump and set constant voltage or top-up injection pattern, opening water control valve 21 and injection end pressure gage valve 71, opening Produced Liquid and control valve 91 and production end pressure gage valve 81；Record not oil, water volume in Produced Liquid in the same time by fluid meter 9, record injection end Pressure gauge 7, production end Pressure gauge 8 force value.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 and control valve 91.
Step 5: nanometer magnetofluid oil displacement process under the action of a magnetic field
Open high-pressure plunger pump and set constant voltage or top-up injection pattern, open control nanometer magnetofluid valve 31 and and injection end pressure gage valve 71, open Produced Liquid and control valve 91 and production end pressure gage valve 81；Open magnetic field generator 6 and set initial magnetic field size；Oil, nanometer magnetofluid volume in Produced Liquid, record injection end Pressure gauge 7 and production end production end 8 force value in the same time is recorded not by fluid meter 9.When production end fluid not oil-containing, close high-pressure plunger pump, control nanometer magnetofluid valve 31, injection end pressure gage valve 71, production end pressure gage valve 81 and Produced Liquid and control valve 91.
Step 6: parameters sensitivity analysis
Repeat step 1 to step 5, respectively the back-up sand flat board that multiple models are identical is carried out oil displacement experiment；In repeatedly displacement of reservoir oil dynamic simulation experiment, change the injection pressure of high-pressure plunger pump or the magnetic field size of injection rate, magnetic field generator 6 generation, and point multiple time points are to the relevant parameter record in experimentation.
Step 7: data process
The conventional Calculation Method of based on crude recovery ratio, according to the experimental data recorded in step 1, step 4, step 5 and step 6, can obtain the oil recovery factor under different experiments operating mode；Additionally, shooting displacement process video data is carried out image procossing, it is possible to obtain real-time displacement and involve scope.
As improvement, can according to the different reservoir geologic characters glass sand making actual oil reservoir Heterogeneous Characteristics back-up sand flat board 4 of reflection in conjunction with different meshes in step 1 so that experimental result has more practical significance.
As improvement, after placing back-up sand flat board 4, can conveniently carry out plane and longitudinal back-up sand flat board oil displacement experiment by regulating flat board clamper 6.
Utilize the experimental provision described in the present invention and method, first Fig. 2, the plane shown in 3 and vertical heterogeneity back-up sand flat board are carried out conventional water drive oil, until Produced Liquid does not change the nanometer magnetofluid displacement of reservoir oil after oil-containing.Arriving from the experimental results: for heterogeneous reservoir, utilize tradition water drive to cause and involve the problem that scope is little, displacement efficiency is low, recovery ratio is only about 40%；After changing the nanometer magnetofluid displacement of reservoir oil, under the control of magnetic field, nanometer magnetofluid is to involving the hypotonic region displacement that scope is low, improves displacing fluid and involves scope, also can improve 20%-30% recovery ratio after water drive again.
Claims (7)
1. a visualization nanometer magnetofluid flat board oil displacement experiment device, including: oil storage intermediate receptacle, water storage intermediate receptacle, storage nanometer magnetofluid intermediate receptacle, back-up sand flat board, flat board clamper, magnetic field generator, injection end Pressure gauge, production end Pressure gauge, fluid meter, vacuum pump, it is characterized in that: on back-up sand flat board diverse location jewel hole and overlap on rubber tube be used for simulate well point, back-up sand flat board is fixed by flat board clamper, described oil storage intermediate receptacle, water storage intermediate receptacle, storage nanometer magnetofluid intermediate receptacle is connected with displacing fluid feed-line respectively, displacing fluid feed-line is connected with back-up sand flat board injection end；Described fluid meter and vacuum pump are connected with Produced Liquid feed-line respectively, and Produced Liquid feed-line is connected with back-up sand flat board production end；Described injection end Pressure gauge is placed in displacing fluid feed-line, measures back-up sand flat board injection end pressure；Described production end Pressure gauge is placed in Produced Liquid feed-line, measures back-up sand flat board production end pressure；Described magnetic field generator is arranged in back-up sand flat board surrounding.
2. visualization nanometer magnetofluid flat board oil displacement experiment device according to claim 1, it is characterised in that: utilize video camera to shoot whole displacement process, and send data to computer.
3. the visualization nanometer magnetofluid flat board oil displacement experiment device according to claim 1-2, it is characterized in that: described back-up sand flat board is made up of panel housings and internal artificial sand rock, wherein panel housings is formed by the splicing of block poly (methyl methacrylate) plate, internal filling artificial sand rock, artificial sand rock is formed by glass sand, epoxy gluing compacting, by adjusting the porous media model that can obtain different permeability, porosity of glass Grains number, glass sand and the part by weight of epoxy resin.
4. the visualization nanometer magnetofluid flat board oil displacement experiment device according to claim 1-3, it is characterised in that: described oil storage intermediate receptacle stores experiment kerosene, adopts tonyred color matching to be used for identifying；Water storage intermediate receptacle stores water, adopts methyl blue color matching to be used for identifying；Storage nano magnetic fluid in storage nanometer magnetofluid intermediate receptacle, nanometer magnetofluid is stable colloidal liquid, magnetic retention granule, base load liquid and the dispersant three that diameter is nanometer scale mix.
5. the visualization nanometer magnetofluid flat board oil displacement experiment device according to claim 1-4, it is characterised in that: high-pressure plunger pump is connected with oil storage intermediate receptacle, water storage intermediate receptacle, storage nanometer magnetofluid intermediate receptacle respectively by pumping line；High-pressure plunger pump can provide the infusion mode such as constant current/constant voltage.
6. a visualization nanometer magnetofluid flat board oil displacement experiment method, adopts experimental provision described for one of claim 1-5, it is characterised in that specifically comprise the following steps that
Step 1: back-up sand flat panel production
Different meshes glass sand is adopted to make plane and vertical heterogeneity back-up sand flat board；
Step 2: back-up sand flat board evacuation
Back-up sand flat board is placed in flat board clamper, closes control fuel tap door, water control valve, control nanometer magnetofluid valve, injection end pressure gage valve and Produced Liquid and control valve, open production end pressure gage valve, control pump valve and vacuum pump, to back-up sand flat board evacuation；When production end gage pressure numerical value drops to 1 × 10-2During Pa, close production end pressure gage valve, control pump valve and vacuum pump；
Step 3: the initial saturated oils of back-up sand flat board
Open high-pressure plunger pump, control fuel tap door so that oil enters and saturated back-up sand flat board；After oil is uniformly distributed back-up sand flat board, close high-pressure plunger pump, control fuel tap door；
Step 4: water drive oil process
Open video camera real time record displacement process, and by video data transmission to computer；Open high-pressure plunger pump and set constant voltage or top-up injection pattern, opening water control valve and injection end pressure gage valve, opening Produced Liquid and control valve and production end pressure gage valve；By fluid meter record not oil, water volume in Produced Liquid in the same time, record injection end Pressure gauge, production end gage pressure value；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 and control valve；
Step 5: nanometer magnetofluid oil displacement process under the action of a magnetic field
Open high-pressure plunger pump and set constant voltage or top-up injection pattern, open control nanometer magnetofluid valve and and injection end pressure gage valve, open Produced Liquid and control valve and production end pressure gage valve；Open magnetic field generator and set initial magnetic field size；By fluid meter record not oil, nanometer magnetofluid volume in Produced Liquid, record injection end Pressure gauge and production end production end force value in the same time；When production end fluid not oil-containing, close high-pressure plunger pump, control nanometer magnetofluid valve, injection end pressure gage valve, production end pressure gage valve and Produced Liquid and control valve；
Step 6: parameters sensitivity analysis
Repeat step 1 to step 5, respectively the back-up sand flat board that multiple models are identical is carried out oil displacement experiment；In repeatedly displacement of reservoir oil dynamic simulation experiment, change the injection pressure of high-pressure plunger pump or the magnetic field size of injection rate, magnetic field generator generation, and point multiple time points are to the relevant parameter record in experimentation；
Step 7: data process
The conventional Calculation Method of based on crude recovery ratio, according to the experimental data recorded in step 1, step 4, step 5 and step 6, obtains the oil recovery factor under different experiments operating mode.
7. visualization nanometer magnetofluid flat board oil displacement experiment method according to claim 6, it is characterised in that shooting displacement process video data is carried out image procossing, obtains real-time displacement and involve scope.
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| CN114776269A (en) * | 2022-04-15 | 2022-07-22 | 长江大学 | Experimental device and method for simulating influence of cracks on oil displacement effect of nano-magnetic fluid |
| CN114776269B (en) * | 2022-04-15 | 2023-07-25 | 长江大学 | Experimental device and method for simulating influence of crack on nano magnetic fluid oil displacement effect |
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