CN105178927B - A kind of displacement simulation experimental provision and system - Google Patents

A kind of displacement simulation experimental provision and system Download PDF

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Publication number
CN105178927B
CN105178927B CN201510712937.6A CN201510712937A CN105178927B CN 105178927 B CN105178927 B CN 105178927B CN 201510712937 A CN201510712937 A CN 201510712937A CN 105178927 B CN105178927 B CN 105178927B
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solution cavity
physical model
fracture hole
fracture
crack
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CN105178927A (en
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侯吉瑞
汪勇
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China University of Petroleum Beijing CUPB
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China University of Petroleum Beijing CUPB
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Abstract

The present invention relates to a kind of displacement simulation experimental provision and system, wherein, experimental provision includes:Bottom water installations, first pressure measurement apparatus, Second device for pressure measurement, source of the gas, constant flow pump, gas-flow rate controller, simulation oil vessel, simulated formation water receptacle, metering device;Wherein, the bottom mouth of a river of the fracture hole physical model is connected with the bottom water installations, the Second device for pressure measurement;Entrance of the constant flow pump with the simulation entrance of oil vessel, the simulated formation water receptacle is connected, and the exporting of the simulation oil vessel, inlet of the outlet of the simulated formation water receptacle with the fracture hole physical model is connected;The source of the gas is connected with one end of the gas-flow rate controller, and the other end of the gas-flow rate controller is connected with the inlet of the fracture hole physical model;The inlet of the fracture hole physical model is connected with the first pressure measurement apparatus;The extraction mouth of the fracture hole physical model is connected with the metering device.

Description

A kind of displacement simulation experimental provision and system
Technical field
The present invention relates to technical field of oil production engineering, more particularly to a kind of displacement simulation experimental provision and system.
Background technology
The patent application document of Application No. 201220267959.9 discloses a kind of fracture-pore reservoir independence vug unit Physical simulation experiment device, the device include die body, backlight, monitoring device and displacement system;Under die body Fracture hole is portrayed provided with simulate subterranean stream first by portion, is portrayed first and portrays seam provided with simulate isolated solution cavity second above fracture hole The 3rd of hole and simulation vertical shaft portrays fracture hole, and first portrays fracture hole and second portrays fracture hole and the 3rd and portray between fracture hole by multiple The simulation fracture connection extended up and down;Die body top surface be provided with simulation flooding pattern the first pipeline, the first pipeline with First portray fracture hole or second portray fracture hole conducting;Multiple the second pipelines turned on crack are provided with the bottom surface of die body; Encapsulated outside die body by resin transparent;The analogue experiment installation can carry out physical analogy to the truth of oilfield reservoir, The intuitively DYNAMIC DISTRIBUTION of analysis water drive remaining oil, profit volume is recorded in real time, and it is objective to various raising recovery ratio measures progress Evaluation.
It is special that above-mentioned experimental provision can simulate the fracture-pore reservoir Reservoir Bodies such as some configuration relations of fracture hole, filling physical property Sign.But possesses following shortcoming:
1st, existing apparatus could not consider influence of the stratum confined pressure to fracture and cave reservoir;
2nd, it is single to adopt position by the master of the seam_cavern type waterflooding extraction in existing apparatus;
3rd, existing apparatus can not be monitored in real time to each point pressure in stratum and flow field change.
The content of the invention
To solve problem of the prior art, the present invention proposes a kind of displacement simulation experimental provision and system, is carbonate rock Fracture-pore reservoir Efficient Development provides theoretical foundation and technical support.
To achieve the above object, the invention provides a kind of displacement simulation experimental system, including:Displacement simulation experimental provision With fracture hole physical model;
The displacement simulation experimental provision is used to carry out displacement test to fracture hole physical model, including:Bottom water installations, first Device for pressure measurement, Second device for pressure measurement, source of the gas, constant flow pump, gas-flow rate controller, simulation oil vessel, simulated formation Water receptacle, metering device;Wherein,
The bottom mouth of a river of the fracture hole physical model is connected with the bottom water installations, the Second device for pressure measurement;
Entrance, the entrance of the simulated formation water receptacle of the constant flow pump with the simulation oil vessel are connected, institute Inlet of the outlet of simulation the exporting of oil vessel, the simulated formation water receptacle with the fracture hole physical model is stated to be connected;
The source of the gas is connected with one end of the gas-flow rate controller, the other end of the gas-flow rate controller and institute The inlet for stating fracture hole physical model is connected;
The inlet of the fracture hole physical model is connected with the first pressure measurement apparatus;
The extraction mouth of the fracture hole physical model is connected with the metering device.
Preferably, the displacement simulation experimental provision also includes video camera;
The video camera, for recording the experimentation of experimental provision.
Preferably, the fracture hole physical model includes:
Solution cavity, crack, substrate and filler;Wherein,
The solution cavity is placed on the substrate with the crack, and the solution cavity is connected to one with the crack, described Filler is used to simulate the solution cavity filling situation;
The fracture hole physical model is provided with inlet, extraction mouth and the bottom mouth of a river.
Preferably, the solution cavity includes solution cavity main body and cover plate, the solution cavity main body include solution cavity chamber, solution cavity mould walls and Crack connecting hole;The cover plate is sealed the solution cavity chamber by helicitic texture and sealing ring;The crack connecting hole is arranged on In the solution cavity mould walls.
Preferably, the solution cavity is connected by crack connecting hole with the crack, is sealed using pressure-pad connector and pressure ring The solution cavity and the crack are connected in one by part.
Preferably, the solution cavity is regular circle shapes shape.
Preferably, the filler is quartz sand.
Preferably, the crack is simulated using polytetrafluoroethylmaterial material pipeline.
To achieve the above object, the present invention also proposes a kind of displacement simulation experimental provision, for entering to fracture hole physical model Row displacement test, including:Bottom water installations, first pressure measurement apparatus, Second device for pressure measurement, source of the gas, constant flow pump, gas stream Measure controller, simulation oil vessel, simulated formation water receptacle, metering device;Wherein,
The bottom mouth of a river of the fracture hole physical model is connected with the bottom water installations, the Second device for pressure measurement;
Entrance, the entrance of the simulated formation water receptacle of the constant flow pump with the simulation oil vessel are connected, institute Inlet of the outlet of simulation the exporting of oil vessel, the simulated formation water receptacle with the fracture hole physical model is stated to be connected;
The source of the gas is connected with one end of the gas-flow rate controller, the other end of the gas-flow rate controller and institute The inlet for stating fracture hole physical model is connected;
The inlet of the fracture hole physical model is connected with the first pressure measurement apparatus;
The extraction mouth of the fracture hole physical model is connected with the metering device.
Preferably, in addition to video camera;
The video camera, for recording the experimentation of experimental provision.
Above-mentioned technical proposal has the advantages that:
The present invention is ground available for fracture-pore reservoir bottom water drive, filled drive, gas injection drive, foam flooding and other displacement tests Study carefully.Study two-phase or multiphase fluid movement and different phase recovery ratio, moisture content in the fracture-pore reservoir of different structure, contain The change of the indexs such as gas rate, producing pressure differential, remaining oil distribution characteristics under research water drive, gas drive, foam flooding and other displacement modes. Theoretical foundation and technical support are provided for fracture and vug carbonate reservoir Efficient Development.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of displacement simulation experimental provision schematic diagram proposed by the present invention;
Fig. 2 is one of fracture hole physical model structure schematic diagram in displacement simulation experimental provision in embodiment;
Fig. 3 is two of fracture hole physical model structure schematic diagram in displacement simulation experimental provision in embodiment;
Fig. 4 is the solution cavity structural representation in fracture hole physical model;
Fig. 5 is the solution cavity structural profile illustration in fracture hole physical model.
Accompanying drawing identifies:
1st, solution cavity model cover plate, 2, solution cavity die body, 3, crack connecting hole, 4, solution cavity chamber,
5th, sealing ring, 6, screw thread, 7, solution cavity mould walls, 8, the unfilled part of solution cavity,
9th, solution-cavity filling part, 10, inlet, 11, extraction mouth, 12, solution cavity,
13rd, large fracture is simulated, 14, the bottom mouth of a river, 15, crack in simulation, 16, simulation gap,
17. bottom water installations, 18, gas-flow rate controller, 19, first pressure measurement apparatus, 20, camera device,
21st, metering device, 22, fracture hole physical model, 23, simulated formation water receptacle, 24. valves,
25th, constant flow pump, 26, source of the gas, 27, simulation oil vessel 28, substrate
29th, Second device for pressure measurement.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made Embodiment, belong to the scope of protection of the invention.
As shown in figure 1, it is a kind of displacement simulation experimental provision schematic diagram proposed by the present invention.Displacement simulation experimental provision is used In to fracture hole physical model carry out displacement test, including:Fracture hole physical model 22, bottom water installations 17, first pressure measurement apparatus 19th, Second device for pressure measurement 29, source of the gas 26, constant flow pump 25, gas-flow rate controller 18, simulation oil vessel 27, simulated formation Water receptacle 23, metering device 21;Wherein,
The bottom mouth of a river 14 of the fracture hole physical model with the bottom water installations 17, the phase of the Second device for pressure measurement 29 Even;A valve 24 is set between the bottom water installations 17 and the Second device for pressure measurement 29;
Entrance, the entrance of the simulated formation water receptacle 23 of the constant flow pump 25 with the simulation oil vessel 27 are connected It is logical, the exporting of the simulation oil vessel 27, the outlet of the simulated formation water receptacle 23 with the fracture hole physical model 22 Inlet 10 is connected;Exit, the exit of the simulated formation water receptacle 23 of the simulation oil vessel 27 are respectively provided with valve 24;
The source of the gas 26 is connected by valve 24 with one end of the gas-flow rate controller 18, the gas flow control The other end of instrument 18 is connected with the inlet 10 of the fracture hole physical model 22;
The inlet 10 of the fracture hole physical model is connected with the first pressure measurement apparatus 19;
The extraction mouth 11 of the fracture hole physical model is connected by valve 24 with the metering device 21.
In addition, the displacement test device of the fracture-pore reservoir also includes the camera device for recording experimentation 20, it is located at the front end of model.
Based on above-mentioned, present invention also offers a kind of displacement simulation experimental system, including:Displacement simulation described above is real Experiment device and fracture hole physical model.Concrete structure situation, is not repeated herein.
Actual fracture-pore reservoir has a complexity, and particularly small solution cavity and crack are distributed in feature, due to geological knowledge Precision problem, it often can not accurately obtain fracture hole distribution.But fracture hole distribution is there is also certain rule, such as the type of fracture hole, Cavern, large fracture, the property of tomography and distribution can form certain understanding.Test fracture hole model can according to geological knowledge, Matter modeling data etc., according to similarity principle, design the fracture hole physical model of fractured-cavernous carbonate reservoir.
In the above-mentioned technical solutions, fracture hole physical model is various in displacement simulation experimental provision.Existing fracture hole thing Reason model may be applicable to the technical program.The one of which knot of fracture hole physical model in displacement simulation experimental provision is described below Structure.
As shown in Fig. 2 it is one of fracture hole physical model structure schematic diagram in displacement simulation experimental provision in embodiment.Such as figure Shown in 3, for two of fracture hole physical model structure schematic diagram in displacement simulation experimental provision in embodiment.The fracture hole physical model Including:
Solution cavity 12, crack, substrate 28 and filler 9;Wherein,
The solution cavity 12 is placed on the substrate 28 with the crack, and the solution cavity 12 is connected to one with the crack Body, the filler 9 are used to simulate the filling situation of solution cavity 12;
The fracture hole physical model is provided with inlet 10, extraction mouth 11 and the bottom mouth of a river 14.
Solution cavity is regular circle shapes shape, solution cavity a diameter of 200mm, 300mm, 400mm, 500mm, 600mm etc. in model, is adopted Made of acrylic material.Crack is simulated using polytetrafluoroethylmaterial material pipeline, pipeline internal diameter be 0.25mm, 0.50mm, 0.75mm, 1.00mm, 1.50mm, 2.00mm etc..Model is made up of crack, solution cavity, substrate, and model is placed in into base after fracture hole connection On plate, fracture hole two-dimensional network model is formed.
As shown in figure 4, it is the solution cavity structural representation in fracture hole physical model.As shown in figure 5, in fracture hole physical model Solution cavity structural profile illustration.Solution cavity 12 includes solution cavity main body 2 and cover plate 1, and the solution cavity main body 2 includes solution cavity chamber 4, solution cavity Mould walls 7 and crack connecting hole 3;The cover plate 1 is sealed the solution cavity chamber 4 by screw thread 6 and sealing ring 5;The crack connects Hole 3 is connect to be arranged in the solution cavity mould walls 7.
Solution cavity and crack be without fixed character size in model, and crack is divided into large, medium and small three ranks, in experimental model Simulated (size is between 0.25mm~2mm) by changing caliber.The crack of three ranks be respectively big rank crack 13, in Rank crack 16, small rank crack 15.The overall diameter of simulation fracture pipeline is identical, and crack is by crack connecting hole, using therewith Supporting pressure ring, pressure-pad are connected with solution cavity.Pressure-pad connector, pressure ring connector are made of polytetrafluoroethylmaterial material,
Solution cavity size can change according to appropriate, and different size of solution cavity is designed with matched sealing ring 5 and cover plate 1.The design for disassembly of solution cavity, filling simulation in solution cavity can be realized, simulate different filling extents and different fillings.Specifically fill Thing is filled out depending on survey region Filling Characteristics, generally, is simulated using different-grain diameter quartz sand or glass marble thin Pine and dense pack.Solution cavity filling extent (i.e. loading) is typically depending on geological knowledge.Once it is provided with solution cavity cavity Filler, solution cavity cavity is interior to include the unfilled part 8 of solution cavity and solution-cavity filling part 9.
The fracture-pore reservoir visualizes displacement test device closer to actual reservoir model, especially for Caves fracture hole Type oil reservoir, the discretization distribution characteristics of fracture hole can be simulated.Simulation for filling solution cavity is more practical.In addition, fracture hole model Detachability strengthen operability and the flexibility of experiment, shorten the foundation, adjustment, maintenance period of model, model system Make technique it is simple, it is repeatable utilize, greatly reduce experimental cost.
Displacement simulation experimental provision is illustrated below by specific embodiment.
Embodiment 1
For the present embodiment be a kind of natural bottom water drive of fracture hole type carbonate reservoir of simulation for after exploitation, waterflooding development, note N2Development process is driven, wherein water filling and gas injection adopts mode using seam note hole, i.e. the inlet 10 of fracture hole physical model is inlet, The extraction mouth 11 of fracture hole physical model is extraction mouth, is specifically comprised the following steps:
(1) model connection and back-up sand
Step 1, as shown in figure 4, connecting fracture hole model according to experimental model, contain 12, solution cavity, wherein solution cavity in model Interior diameter is 500mm totally 2, and solution cavity interior diameter is 400mm totally 3, and solution cavity interior diameter is 300mm totally 6, and solution cavity interior diameter is 200mm totally 1.19, crack, wherein, totally 3, big rank crack, totally 4, middle rank crack, small 12, rank crack.Crack It is connected using pressure ring with pressure-pad with solution cavity.
Step 2, solution cavity back-up sand, 30 mesh quartz sands is used to fill solution cavity as filling medium.First, according to solution cavity body Product calculates back-up sand volume with design loading, then measures the quartz sand of respective volume, opens solution cavity cover plate, sand is inserted into solution cavity In.In involved model, no 1, solution cavity of filling, filling extent is 1,25% solution cavity, and filling extent is 8,50% solution cavity, Filling extent is 2,75% solution cavity.
(2) saturated oils is tested
Step 1, model vacuumize, using any inlet of vavuum pump access model or extraction mouth, close remaining it is all enter Outlet, when pressure gauge is shown as -0.1MPa, closes all inlet and outlet, vacuumizes and finish.
Step 2, saturated oils, using the negative pressure saturation simulation oil formed in vacuum, seen for the ease of visualization Examine, experiment is handled with simulation oil using soudan III reagent dyeing.In order to increase the speed of saturated oils, using constant flow pump 25 by mould Intend oil to be pumped into fracture hole physical model 22, open the pipeline of constant flow pump 25- simulation oil vessel 27- fracture holes physical model 22, start Saturated oils, constant flow pump integrated flow, as saturation oil mass are recorded, untill the equal saturation of whole model is complete.
(3) bottom water drive is for experiment
The inlet 10 and extraction mouth 11 of fracture hole model are opened, metering device 21 is accessed, opens bottom water installations 17- fracture hole things The pipeline of the model bottom mouth of a river 14 is managed, experiment camera device 20 is opened, opens connection and the Second device for pressure measurement 29 at the bottom mouth of a river 14, Start bottom water drive for experiment.In experimentation, inlet 10 is recorded in real time with producing moisture content, the model bottom water drive of mouth 11 for pressure Bottom water drive replaces process in power, videograph fracture hole model.When inlet 10 and any mouthful in extraction mouth 11 of moisture content are more than When 98%, corresponding mouth is closed, until when inlet 10 reaches 98% with extraction 11 equal moisture content of mouth, bottom water drive is tied for experiment Beam.
This experiment can obtain during specific fracture-pore reservoir bottom water drive is replaced bottom water drive and change for pressure difference, inlet 10 with The water breakthrough time of mouth 11, moisture content, production rate, production liquid speed degree are produced, oil recovery, bottom water drive are for remaining oil distribution etc..
(4) displacement in flooding is tested
For ease of model visualization, injection water uses methylene blue staining.In the injecting process, bottom water passage stays open, Open the pipeline of the bottom water installations 17- fracture hole physical model bottoms mouth of a river 14.Open constant flow pump 25- simulated formation water receptacle 23- fracture hole things The pipeline of model inlet 10 is managed, the pipeline of fracture hole physical model extraction mouth 11- metering devices 21 is opened, opens experiment camera device 20, connection and the bottom mouth of a river 14 and the first pressure measurement apparatus 19 of inlet 10 are opened, according to the waterflood injection rate of setting, starts to note Water displacement test, the moisture content of the mouth 11 of record extraction in real time, model displacement in flooding pressure, bottom water drive replace pressure, videograph seam Displacement in flooding process in the model of hole.When producing the moisture content of mouth 11 more than 98%, extraction mouth is closed, displacement in flooding experiment terminates.
This experiment can obtain specific fracture-pore reservoir and (be adopted in seam note hole) under specific injection mode, displacement in flooding process Middle displacement pressure difference change, extraction mouth moisture content, production rate, production liquid speed degree, oil recovery, displacement in flooding remaining oil distribution Deng.
(5) N is noted2Displacement test
Note N2During, bottom water passage stays open, and opens the pipeline of the bottom water installations 17- fracture hole physical model bottoms mouth of a river 14, Open N2The pipeline of source of the gas 26- gas-flow rate controller 18- fracture hole physical models inlet 10, open fracture hole physical model extraction mouth The pipeline of 11- metering devices 21, open experiment camera device 20, open connection and the Second device for pressure measurement 29 at the bottom mouth of a river 14 and The connected first pressure measurement apparatus 19 of inlet 10, according to the gas injection speed of setting, start gas injection displacement test, in real time record Moisture content, the void fraction of mouth 11 are produced, model gas injection displacement pressure, bottom water drive replace pressure, gas injection in videograph fracture hole model Displacement process.When producing the moisture content of mouth 11 more than 98%, extraction mouth is closed, gas injection displacement test terminates.
This experiment can obtain specific fracture-pore reservoir and (be adopted in seam note hole) under specific injection mode, gas injection displacement process Middle displacement pressure difference change, extraction mouth moisture content, void fraction, production rate, production liquid speed degree, oil recovery, gas injection displacement are remaining Oil cloth etc..
Embodiment 2
For the present embodiment be a kind of natural bottom water drive of fracture hole type carbonate reservoir of simulation for after exploitation, waterflooding development and note N2Development process is driven, wherein water filling and gas injection adopts mode using hole note hole, i.e. fracture hole physical model inlet 10 is inlet, seam Hole physical model extraction mouth 11 is extraction mouth, is specifically comprised the following steps:
(1) model connection and back-up sand
Step 1, as shown in figure 5, connecting fracture hole model according to experimental model, contain 15, solution cavity, wherein solution cavity in model Interior diameter is 500mm totally 4, and solution cavity interior diameter is 400mm totally 1, and solution cavity interior diameter is 300mm totally 10, solution cavity interior diameter For 200mm totally 1.30, crack, totally 6, its middle and big class crack, totally 24, small rank crack.Crack uses pressure ring and pressure-pad It is connected with solution cavity.
Step 2, solution cavity back-up sand, 30 mesh quartz sands is used to fill solution cavity as filling medium.First, according to solution cavity body Product calculates back-up sand volume with design loading, then measures the quartz sand of respective volume, opens solution cavity cover plate, sand is inserted into solution cavity In.In involved model, filling extent is 1,25% solution cavity, and filling extent is 12,50% solution cavity, filling extent 75% 2, solution cavity.
(2) saturated oils is tested
Step 1, model vacuumize, using any inlet of vavuum pump access model or extraction mouth, close remaining it is all enter Outlet, when pressure gauge is shown as -0.1MPa, closes all inlet and outlet, vacuumizes and finish.
Step 2, saturated oils, using the negative pressure saturation simulation oil formed in vacuum, seen for the ease of visualization Examine, experiment is handled with simulation oil using soudan III reagent dyeing.In order to increase the speed of saturated oils, using constant flow pump 25 by mould Intend oil to be pumped into fracture hole physical model 22, open the pipeline of constant flow pump 25- simulation oil vessel 27- fracture holes physical model 22, start Saturated oils, constant flow pump integrated flow, as saturation oil mass are recorded, untill the equal saturation of whole model is complete.
(3) bottom water drive is for experiment
Fracture hole physical model inlet 10 and extraction mouth 11 are opened, accesses metering device 21, opens bottom water installations 17- fracture holes The pipeline of the physical model bottom mouth of a river 14, experiment camera device 20 is opened, opens connection and the Second device for pressure measurement at the bottom mouth of a river 14 29, start bottom water drive for experiment.In experimentation, record produces the moisture content of mouth 11 and inlet 10, model bottom water drive in real time Process is replaced for bottom water drive in pressure, videograph fracture hole model.When extraction mouth 11 is more than with any mouthful of moisture content in inlet 10 When 98%, corresponding mouth is closed, until when extraction mouth 11 reaches 98% with 10 equal moisture content of inlet, bottom water drive is tied for experiment Beam.
This experiment can obtain during specific fracture-pore reservoir bottom water drive is replaced bottom water drive and change for pressure difference, extraction mouth 11 with The water breakthrough time of inlet 10, moisture content, production rate, production liquid speed degree, oil recovery, bottom water drive are for remaining oil distribution etc..
(4) displacement in flooding is tested
For ease of model visualization, injection water uses methylene blue staining.In the injecting process, bottom water passage stays open, Open the pipeline of the bottom water installations 17- fracture hole physical model bottoms mouth of a river 14.Open constant flow pump 25- simulation water receptacle 23- fracture hole physics moulds The pipeline of type inlet 10, the pipeline of fracture hole physical model extraction mouth 11- metering devices 21 is opened, experiment camera device 20 is opened, beats The first pressure measurement apparatus 19 that connection is connected with the second pressure device 29 and inlet 10 at the bottom mouth of a river 14 is opened, according to setting Waterflood injection rate, start displacement in flooding experiment, the moisture content of the mouth 11 of record extraction in real time, model displacement in flooding pressure, bottom water drive are replaced Pressure, displacement in flooding process in videograph fracture hole model.When producing the moisture content of mouth 11 more than 98%, extraction mouth, note are closed Water displacement test terminates.
This experiment can obtain specific fracture-pore reservoir and (be adopted in hole note hole) under specific injection mode, displacement in flooding process Middle displacement pressure difference change, extraction mouth moisture content, production rate, production liquid speed degree, oil recovery, displacement in flooding remaining oil distribution Deng.
(5) N is noted2Displacement test
Note N2During, bottom water passage stays open, and opens the pipeline of the bottom water installations 17- fracture hole physical model bottoms mouth of a river 14, Open N2The pipeline of source of the gas 26- gas-flow rate controller 18- fracture hole physical models inlet 10, open fracture hole physical model extraction mouth The pipeline of 11- metering devices 21, experiment camera device 20 is opened, open second pressure device 29 and the injection of connection and the bottom mouth of a river 14 The connected first pressure measurement apparatus 19 of mouth 10, according to the gas injection speed of setting, start gas injection displacement test, record produces in real time Mouthfuls 11 moisture content, void fraction, model gas injection displacement pressure, bottom water drive replace pressure, gas injection displacement in videograph fracture hole model Process.When producing the moisture content of mouth 11 more than 98%, extraction mouth is closed, gas injection displacement test terminates.
This experiment can obtain specific fracture-pore reservoir and (be adopted in hole note hole) under specific injection mode, gas injection displacement process Middle displacement pressure difference change, extraction mouth moisture content, void fraction, production rate, production liquid speed degree, oil recovery, gas injection displacement are remaining Oil cloth etc..
, can for the different fracture hole model bottom mouths of a river 14, inlet 10 and extraction mouth 11 for fracture hole physical model To change.When simulating bottom water drive for experiment, bottom water is injected by the bottom mouth of a river 14, and inlet 10 can be used as extraction with extraction mouth 11 Mouthful.When simulating water filling, gas injection or note foam displacement test, bottom water can be opened and closed as needed, can select to inject Mouthfuls 10 be inlet, extraction mouth 11 be extraction mouth or inlet 10 be extraction mouth, to produce mouth 11 be inlet, one note one of formation is adopted Simulation.When it is more mouthfuls that note, which adopts mouth, it can realize that more notes more and adopt simulation.
This experimental provision can be used for fracture-pore reservoir bottom water drive, filled drive, gas injection drive, foam flooding and other displacement tests Research.Study two-phase or multiphase fluid movement and different phase recovery ratio in the fracture-pore reservoir of different structure, moisture content, The change of the indexs such as void fraction, producing pressure differential, remaining oil distribution is special under research water drive, gas drive, foam flooding and other displacement modes Sign.Theoretical foundation and technical support are provided for fracture and vug carbonate reservoir Efficient Development.
Above-described embodiment, the purpose of the present invention, technical scheme and beneficial effect are carried out further Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., all should include Within protection scope of the present invention.

Claims (3)

  1. A kind of 1. displacement simulation experimental system, it is characterised in that including:Displacement simulation experimental provision and fracture hole physical model;
    The displacement simulation experimental provision is used to carry out displacement test to fracture hole physical model, including:Bottom water installations, first pressure Measurement apparatus, Second device for pressure measurement, source of the gas, constant flow pump, gas-flow rate controller, simulation oil vessel, the simulated formation water capacity Device, metering device;Wherein,
    The bottom mouth of a river of the fracture hole physical model is connected with the bottom water installations, the Second device for pressure measurement;
    Entrance, the entrance of the simulated formation water receptacle of the constant flow pump with the simulation oil vessel are connected, the mould Intend inlet of the outlet of the exporting of oil vessel, the simulated formation water receptacle with the fracture hole physical model to be connected;
    The source of the gas is connected with one end of the gas-flow rate controller, the other end of the gas-flow rate controller and the seam The inlet of hole physical model is connected;
    The inlet of the fracture hole physical model is connected with the first pressure measurement apparatus;
    The extraction mouth of the fracture hole physical model is connected with the metering device;
    The fracture hole physical model includes:Solution cavity, crack, substrate and filler;Wherein, the solution cavity includes solution cavity main body and lid Plate, the solution cavity main body include solution cavity chamber, solution cavity mould walls and crack connecting hole;The cover plate passes through helicitic texture and sealing ring The solution cavity chamber is sealed;The crack connecting hole is arranged in the solution cavity mould walls;The solution cavity is placed in the crack On the substrate, the solution cavity is connected by crack connecting hole with the crack, will using pressure-pad connector and pressure ring seal The solution cavity is connected in one with the crack, and the filler is used to simulate the solution cavity filling situation;The fracture hole physics Model is provided with inlet, extraction mouth and the bottom mouth of a river;The solution cavity is regular circle shapes shape, and the crack uses polytetrafluoroethylene (PTFE) Material pipeline is simulated.
  2. 2. displacement simulation experimental system as claimed in claim 1, it is characterised in that the displacement simulation experimental provision also includes Video camera;
    The video camera, for recording the experimentation of experimental provision.
  3. 3. displacement simulation experimental system as claimed in claim 1, it is characterised in that the filler is quartz sand.
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