CN107701182A - A kind of device for simulating row's formula horizontal well chemical flooding exploitation of gas hydrate - Google Patents
A kind of device for simulating row's formula horizontal well chemical flooding exploitation of gas hydrate Download PDFInfo
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- CN107701182A CN107701182A CN201710992267.7A CN201710992267A CN107701182A CN 107701182 A CN107701182 A CN 107701182A CN 201710992267 A CN201710992267 A CN 201710992267A CN 107701182 A CN107701182 A CN 107701182A
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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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
-
- 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
-
- 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
- E21B47/00—Survey of boreholes or wells
Abstract
The invention discloses a kind of device for simulating row's formula horizontal well chemical flooding exploitation of gas hydrate, it is related to gas hydrates development field.Device includes air supply system, liquid-supplying system, simulation system, flood pattern, production system and monitoring system, apparatus of the present invention use main body of the back-up sand case as simulation system, can the row's of simulation formula horizontal-well network, pass through air supply system, liquid-supplying system supplies natural gas into simulation system and water forms gas hydrates, driven water-replacing and chemical agent are injected by flood pattern to exploit to simulate chemical flooding, produced gas and water are implemented to collect by production system, complete monitoring is implemented to experimentation by monitoring system, experimental provision of the present invention implements simulation using three dimensional constitution to row's formula horizontal well chemical flooding exploitation of gas hydrate, there is certain directive function to the research of gas hydrates chemical flooding withdrawal mechanism.
Description
Technical field
The invention discloses a kind of device for simulating row's formula horizontal well chemical flooding exploitation of gas hydrate, it is related to natural gas
Hydrate development field, it is particularly used for simulating a kind of laboratory experiment dress of row's formula horizontal well chemical flooding exploitation of gas hydrate
Put.
Background technology
Gas hydrates (natural gas hydrate, abbreviation NGH) are natural gases under certain low temperature, high pressure
The non-stoichiometry cage compound formed with water, also referred to as " combustible ice ".1m3Gas hydrates can contain 164m3Methane gas
And 0.8m3Water." combustible ice " is the product of growing nonparasitically upon another plant of natural gas, and application is roughly the same with natural gas, is a kind of typical
Oil substitutes." combustible ice " easily burns, under equal conditions, energy ratio coal caused by " combustible ice " burning, oil, natural
Gas will be higher by decades of times, be described as " belonging to the super energy that end is come ".
The flammable ice reserves very abundant in China, according to investigation, the gas hydrates in China are mainly distributed on south
Marine site, Area of The East China Sea, Qinghai-Tibet tundra and northeast tundra.
Artificially break the phase balance condition that gas hydrates are stabilized, promote its decomposition, be that current exploitation is natural
The main method of gas hydrate.According to the equilbrium phase diagram of gas hydrates, heating, chemical method, decompression can be generally divided into
The class of method three.
Heating：Steam, hot water, hot salt brine or other hot fluid mediums are mainly pumped into natural gas by the method from ground
Hydrate reservoir, also using the fire flooding used when exploiting heavy oil or drill string heater can be utilized.Hot production technique it is main not
Foot is to cause substantial amounts of heat loss, and efficiency is very low.
Add chemical agent：The chemical agent such as some chemical agents, salt solution, methanol, ethanol, ethylene glycol, glycerine can change
Become the phase balance condition of gas hydrate synthesis, reduce hydrate equilibrium temperature.The shortcomings that adding chemical agent maximum is that expense is too expensive.
Because the pressure of big midocean gas hydrates is higher, thus the method should not be used.
Voltage drop method：Cause the movement of the stable phase equilibrium line of gas hydrates by reducing pressure, so as to reach
Promote the purpose of gas hydrate dissociation.Free gas under exploitation hydrate layer is that the one kind for reducing reservoir pressure has efficacious prescriptions
Method, the purpose of control reservoir pressure can be reached additionally by the extraction rate of regulation natural gas, and then controls hydrate
The effect of decomposition.The characteristics of voltage drop method maximum is continuous agitation that need not be expensive, thus it is likely to become and opened on a large scale from now on
Adopt one of effective ways of gas hydrates.
But exploitation of gas hydrates technology is opened gas hydrates still in stage of fumbling, countries in the world at present
Hair not yet makes the standard of a sleeve forming, and the method for in-house laboratory investigation is still the main body of combustible ice production technique research,
CN101710088A announces a kind of gas hydrates generation and decomposition test method and device, passes through one-dimensional back-up sand resistivity mould
Type pipe implements simulated experiment to gas hydrates.CN103206210B announces a kind of hot fluid pressure break exploitation of gas hydrate
The experimental provision of Tibetan, supervised by the axle frac system of hydrate core three, pressure break flood pattern, natural gas extraction system and sound emission
Examining system implements gas hydrates simulated experiment.CN101246117B announces a kind of gas hydrates synthesis and macromechanics
Property comprehensive experimental system, by gas hydrates synthesis module, mechanical property experiment module and microscopic measurement module to day
Right gas hydrate carries out simulated experiment.Above-mentioned patent equipment can not simulation water horizontal well exploitation of gas hydrate, and be unable to reach
Visualized experiment.CN105909224A announces a kind of experiment dress of dual horizontal well electrical heating secondary buck exploitation of gas hydrate
Put and method of work, pass through gas injection system, power system, gas hydrates reaction system, data monitoring processing system, gas-liquid
Separate measurement system carries out simulated experiment to gas hydrates.But stored up using power system heated natural gas hydrate merely
Tibetan can not simulate horizontal well displacement operation in actual production.In view of this, the present inventor proposes a kind of simulation row's formula horizontal well
The device for driving exploitation of gas hydrate is learned, to meet the requirement of current three-dimensional simulation experimental provision, and overcomes prior art
Defect, and apparatus of the present invention main body is transparent visual material, can carry out finer sight to chemical flooding exploitation of gas hydrate
Examine.
The content of the invention
The invention discloses a kind of device for simulating row's formula horizontal well chemical flooding exploitation of gas hydrate, device includes supplying
Gas system, liquid-supplying system, simulation system, flood pattern, production system and monitoring system, apparatus of the present invention are made using back-up sand case
For the main body of simulation system, can the row's of simulation formula horizontal-well network, supplied by air supply system, liquid-supplying system into simulation system natural
Gas and water form gas hydrates, inject driven water-replacing and chemical agent by flood pattern and are exploited with simulating chemical flooding, pass through life
Production system is implemented to collect to produced gas and water, implements complete monitoring, experimental provision of the present invention to experimentation by monitoring system
Chemical flooding exploitation of gas hydrate is implemented to simulate using three dimensional constitution, gas hydrates chemical flooding withdrawal mechanism is studied
There is certain directive function.
Wherein described air supply system is connected with simulation system, and the liquid-supplying system is connected with simulation system, the note
Water system is connected with simulation system, and the production system is connected with simulation system, the monitoring system respectively with the confession
Gas system, liquid-supplying system, simulation system, flood pattern are connected with production system.
The air supply system is used to provide natural gas for synthesis of natural gas hydrate inside the simulation system；The feed flow
System is used to provide water for synthesis of natural gas hydrate inside the simulation system；The flood pattern is used for
System injection driven water-replacing and chemical agent, to simulate water injection well in actual production；The production system is used to produce the simulation system
Caused natural gas and water in system, and the output gas yield, aquatic products amount are analyzed, to simulate producing well in actual production；Institute
State simulation system to be used to simulate gas hydrates pressure, temperature, saturation degree, permeability and conventional formation parameter, and simulate
Formula horizontal well hole pattern is arranged in gas hydrates；The monitoring system is used for air supply system described in real-time collecting, supplied
Liquid system, simulation system, flood pattern, production system running parameter, data caused by writing task parameter, and pass through monitoring
System controls experimental implementation.
Preferably, air supply system of the invention includes natural gas bottle, control valve, supercharging device, gas flowmeter, pressure
Sensor, temperature sensor, high pressure line, tap valve；Natural gas bottle outlet is connected to supercharging device by high pressure line and entered
Mouthful, control valve plays the feed speed effect of regulation natural gas, supercharging device outlet between natural gas bottle and supercharging device
Tap valve inlet is connected to by high pressure line, gas flowmeter, pressure sensor, temperature sensor be located at supercharging device with
Between tapping valve, play a part of monitoring gas flow, pressure, temperature, tap valve export is connected with the simulation system
Connect.
Natural gas bottle is conventional chambers experimental facilities in the air supply system, the control valve be with signal transmission and
The traditional regulation valve arrangement of remote control function, the gas flowmeter, pressure sensor, temperature sensor are with signal
The conventional chambers experimental facilities of transfer function, the tap valve is the conventional chambers experimental facilities with diverter function, described
Supercharging device can be constant speed pump group, constant current pump group, constant pressure pump group and other application in the pump group of laboratory experiment.
Preferably, liquid-supplying system of the invention includes water storage device, control valve, supercharging device, fluid flowmeter, pressure
Sensor, temperature sensor, high pressure line, tap valve；Water storage device outlet is connected to supercharging device by high pressure line and entered
Mouthful, control valve plays the feed speed effect of regulation water between water storage device and supercharging device, and supercharging device outlet passes through
High pressure line is connected to tap valve inlet, and fluid flowmeter, pressure sensor, temperature sensor are located at supercharging device and tap
Between valve, play a part of monitoring fluid flow, pressure, temperature, tap valve export is connected with the simulation system.
In the liquid-supplying system water storage device include water bottle, intermediate receptacle, beaker and other there is the routine of water storage function
Laboratory experiment equipment, the water storage device internal liquid include stratum water, seawater, simulated formation water and other experimental waters, institute
Control valve is stated as the traditional regulation valve arrangement with signal transmission and remote control function, the fluid flowmeter, pressure
Sensor, temperature sensor are the conventional chambers experimental facilities with signal transfer functions, and the tap valve is with shunting
The conventional chambers experimental facilities of function, the supercharging device can be constant speed pump group, constant current pump group, constant pressure pump group and other should
Pump group for laboratory experiment.
Preferably, flood pattern of the invention includes water storage device, control valve, supercharging device, fluid flowmeter, pressure
Sensor, temperature sensor, high pressure line, three-way connection, check-valves, liquid intermediate receptacle, agitating device, tap valve, note
Well attachment means；Water storage device outlet is connected to supercharging device entrance by high pressure line, and control valve is located at water storage device
Between supercharging device, the feed speed effect of regulation driven water-replacing is played, supercharging device outlet is connected to threeway by high pressure line
Fitting inlet, fluid flowmeter, pressure sensor, temperature sensor, check-valves rise between supercharging device and three-way connection
To the effect of monitoring displacement water-carrying capacity, pressure, temperature, and prevent driven water-replacing from flowing back；The outlet of liquid intermediate receptacle passes through high-voltage tube
Line is connected to supercharging device entrance, and control valve plays regulation liquid supply between liquid intermediate receptacle and supercharging device
Speed is acted on, and liquid intermediate receptacle exit is provided with check-valves, prevents liquid from flowing back, and supercharging device outlet is connected by high pressure line
Agitating device entrance is connect, agitating device is used to the liquid agitation that supercharging device is fed chemical agent is uniformly made, and agitating device goes out
Mouth is connected to three-way connection entrance by high pressure line, and fluid flowmeter, pressure sensor, temperature sensor, check-valves are located at
Between agitating device and three-way connection, play a part of the chemical agent flux of monitoring, pressure, temperature, and prevent chemical agent from flowing back；Three
Pass joint is connected to tap valve by high pressure line, and tap valve is connected to water injection well attachment means by high pressure line, noted
Well attachment means are connected with the simulation system.
In the flood pattern water storage device include water bottle, intermediate receptacle, beaker and other there is the routine of water storage function
Laboratory experiment equipment, the control valve is the traditional regulation valve arrangement with signal transmission and remote control function, described
Fluid flowmeter, pressure sensor, temperature sensor are the conventional chambers experimental facilities with signal transfer functions, the supercharging
Device can be that constant speed pump group, constant current pump group, constant pressure pump group and other application are in the pump group of laboratory experiment, the check-valves
Conventional chambers experimental facilities with individual event circulating function, the agitating device set for the conventional chambers experiment with agitating function
Standby, the tap valve is the conventional chambers experimental facilities with diverter function, and the water injection well attachment means are with connection
Simulate the conventional chambers experimental facilities of water injection well and sealing function.
Preferably, production system of the invention includes producing well attachment means, tap valve, control valve, pressure sensing
Device, temperature sensor, high pressure line, back-pressure valve, gas-liquid separator, water storage device, gas intermediate receptacle；Producing well attachment means
It is connected with tap valve by high pressure line, back pressure valve inlet is connected with tap valve by high pressure line, control valve, pressure
Sensor, temperature sensor play a part of monitoring output object pressure, temperature, back pressure between tap valve and back-pressure valve
Valve plays the effect of simulated formation pressure, and the back pressure valve outlet is connected with gas-liquid separator, and gas-liquid separator is real by output object
Gas-liquid separation is applied, and output water is fed into water storage device, output gas feeds gas intermediate receptacle；Producing well attachment means and simulation
System is connected, and output object caused by simulation system work enters production system by producing well attachment means.
Producing well attachment means are the conventional room with connection simulated production well head and sealing function in the production system
Interior experimental facilities, the tap valve are the conventional chambers experimental facilities with diverter function, and the control valve is with letter
Number transmission and remote control function traditional regulation valve arrangement, the pressure sensor, temperature sensor be with signal pass
The conventional chambers experimental facilities of transmission function, the back-pressure valve are the conventional chambers experimental facilities with back pressure function, the gas-liquid
Separator is the conventional chambers experimental facilities with gas-liquid separating function, and the water storage device includes water bottle, intermediate receptacle, beaker
And other have the conventional chambers experimental facilities of water storage function.
Preferably, simulation system of the invention include insulating box, reaction vessel, simulation water injection well, simulated production well head,
Air supply inlet, feed flow entrance, temperature measuring equipment, pressure tester, bolt hole, upper cover plate, simulation wellbore hole, simulation sand body；Reaction vessel
For the high pressure resistant clear sheet of cuboid, the upper cover plate is located at the reaction vessel top, formed by bolt hole with bolt seal
Cuboid confined space, simulation water injection well, simulated production well head, temperature measuring equipment interface, pressure tester interface are respectively positioned on
Lid surface, the air supply inlet, feed flow entrance are located at reaction vessel surface, and simulation sand body is located at reaction vessel interior, simulated
Inside simulation sand body, the temperature measuring equipment and the pressure tester are located inside simulation sand body pit shaft, the reaction vessel,
Simulate water injection well, simulated production well head, air supply inlet, feed flow entrance, temperature measuring equipment, pressure tester, bolt hole, upper cover plate,
Simulation wellbore hole, simulation sand body are respectively positioned in insulating box.
The reaction vessel is the high pressure resistant high strength glass of rectangular shape, its length, width range 1-2m, height model
Enclose for 0.5-1m, thickness range 3-10cm, highest simulated storage pressure 35Mpa, the reaction vessel and upper cover plate contact surface
Provided with sealing ring, for increasing simulation system sealing, the sealing ring material is high pressure resistant rubber, and the temperature measuring equipment is tool
There are temperature-monitoring function and the conventional chambers experimental facilities of signal transfer functions, the pressure tester is with pressure monitoring function
And the conventional chambers experimental facilities of signal transfer functions, the simulation sand body include quartz sand, rock core powder and other conventional moulds
Intend storage sand body.
The simulation wellbore hole includes stainless steel tube, sealing original paper and drawing out type filler, will be simulated by sealing original paper
Pit shaft is fixed on upper cover plate surface, and stainless steel tube includes simulation straight well section, dummy level section and analogue perforation, natural to simulate
Gas hydrate storage in horizontal well, the drawing out type filler include rubber bar, nylon rod, and other have it is low temperature resistant,
With deformation function, the filler with some strength.
The specifically used method of simulation wellbore hole is：When simulation sand body is added in reaction vessel, simulation wellbore hole is placed
In sand body, drawing out type filler is positioned over inside stainless steel tube, and natural gas and water are fed into reaction vessel and keeps low
Warm high pressure, after simulation sand body is internally formed gas hydrates and keeps stable, drawing out type filler is taken out, and will sealing
Original paper modulates closure state.
Horizontal water injection well can be in the same direction or reverse with horizontal production well direction in row's formula horizontal-well network
's；Horizontal water injection well and the horizontal segment of horizontal production well can be isometric or non-etc. in row's formula horizontal-well network
Long；Horizontal water injection well and horizontal production well can be aligned fashion or dislocation point in row's formula horizontal-well network
Cloth；The horizontal flood well horizontal segment depth and the horizontal production well horizontal segment depth can be contour, the levels
Water injection well horizontal segment can also be located above or below the horizontal production well horizontal segment.
Valve is tapped in the air supply system by high pressure line with air supply inlet to be connected, and is divided in the liquid-supplying system institute
Connect valve by high pressure line with feed flow entrance to be connected, water injection well attachment means and simulation water injection well in the flood pattern
It is connected, producing well attachment means are connected with simulated production well head in the production system.
Preferably, monitoring system of the invention includes computer and transmission cable, the air supply system, liquid-supplying system, mould
Plan system, flood pattern, production system are connected by transmission cable with computer, to collection is warm in real time in experimentation
Degree, pressure, output logistics capacity and other experimental datas, and experimental implementation is controlled by monitoring system.
A kind of device beneficial effect of simulation row's formula horizontal well chemical flooding exploitation of gas hydrate of the embodiment of the present invention
For：
1) air supply system and liquid-supplying system are separate in the present invention, have multiple air supply inlets and confession on reaction vessel surface
Liquid entrance, the natural gas and moisture portion for making injection reaction vessel interior are more uniformly distributed, and separate feeding pipe is to mould
It is higher that precision is injected when natural gas and water are injected in plan system, by controlling air supply system and liquid-supplying system injection rate, can be simulated
Different gas hydrates saturation degree storages.
2) flood pattern and production system of the present invention are all connected to the simulation wellbore hole entrance on upper cover plate surface, and simulation wellbore hole
It is in row's formula horizontal well formula branch in reaction vessel interior, it is natural can more accurately simulates row's formula horizontal wells in actual production
The design parameter of gas hydrate.
3) reaction vessel main body is transparent, the hydration it is observed that chemical flooding taps natural gas in simulation system of the present invention
The change of different time sections simulation sand body, has certain guidance to make to chemical flooding exploitation of gas hydrate study mechanism during thing
With.
4) application based on monitoring system, can effectively gather in experiment temperature in different time section, pressure, Liquid output and
Other experimental datas, Mathematical Model Analysis can be carried out in input computer in real time, for by Physical simulation experiment and numerical simulation
Experimental result is combined.
5) use based on simulation wellbore hole, mould effectively can be carried out to horizontal well hole pattern, perforating modes in actual production
Intend, experimental precision can be effectively improved.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, make required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those skilled in the art, it can also be obtained on the premise of not paying creative work according to these accompanying drawings other attached
Figure.
Fig. 1 is the structural representation of experimental provision.
Fig. 2 is air supply system detailed construction schematic diagram.
Fig. 3 is liquid-supplying system detailed construction schematic diagram.
Fig. 4 is flood pattern detailed construction schematic diagram.
Fig. 5 is production system detailed construction schematic diagram.
Fig. 6 is simulation system detailed construction schematic diagram.
Fig. 7 is simulation system side view.
Fig. 8 is that upper cover plate arranges schematic diagram.
Fig. 9 is simulation wellbore hole structural representation.
Figure 10 is dummy level well pattern aligned fashion schematic diagram in the same direction.
Figure 11 is the reverse aligned fashion schematic diagram of dummy level well pattern.
Figure 12 is that dummy level well pattern is dislocatedly distributed schematic diagram A in the same direction.
Figure 13 is that dummy level well pattern is dislocatedly distributed schematic diagram B in the same direction.
Figure 14 is that dummy level well pattern is reversely dislocatedly distributed schematic diagram A.
Figure 15 is that dummy level well pattern is reversely dislocatedly distributed schematic diagram B.
Figure 16 is dummy level section depth schematic diagram.
Drawing reference numeral：1st, natural gas bottle 2, control valve 3, supercharging device 4, gas flowmeter 5, pressure sensor
6th, temperature sensor 7, high pressure line 8, tap valve 9, water storage device 10, fluid flowmeter 11, check-valves 12, threeway
Joint 13, methanol intermediate receptacle 14, ethanol intermediate receptacle 15, agitating device 16, water injection well attachment means 17, producing well
Attachment means 18, back-pressure valve 19, gas-liquid separator 20, gas intermediate receptacle 21, insulating box 22, reaction vessel 23, mould
Pseudowater injector mouth 24, simulated production well head 25, air supply inlet 26, feed flow entrance 27, temperature measuring equipment 28, pressure tester
29th, bolt hole 30, upper cover plate 31, simulation wellbore hole 32, simulation sand body 33, drawing out type filler 34, sealing original paper 35,
Simulate straight well section 36, dummy level section 37, analogue perforation 38, stainless steel tube 39, dummy level water injection well 40, simulation water
Flat producing well.
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.Based on this
Embodiment in invention, the every other reality that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example is applied, belongs to the scope of protection of the invention.
As shown in figure 1, it is a kind of knot for the device for simulating row's formula horizontal well chemical flooding exploitation of gas hydrate of the present invention
Structure schematic diagram, including air supply system, liquid-supplying system, simulation system, flood pattern, production system and monitoring system；Wherein institute
State air supply system with simulation system to be connected, the liquid-supplying system is connected with simulation system, and the flood pattern is with simulation
System is connected, and the production system is connected with simulation system, the monitoring system respectively with the air supply system, feed flow system
System, simulation system, flood pattern are connected with production system.
The air supply system is used to provide natural gas for synthesis of natural gas hydrate inside the simulation system；The feed flow
System is used to provide water for synthesis of natural gas hydrate inside the simulation system；The flood pattern is used for
System injection driven water-replacing and chemical agent, to simulate water injection well in actual production；The production system is used to produce the simulation system
Caused natural gas and water in system, and the output gas yield, aquatic products amount are analyzed, to simulate producing well in actual production；Institute
State simulation system to be used to simulate gas hydrates pressure, temperature, saturation degree, permeability and conventional formation parameter, and simulate
Formula horizontal well hole pattern is arranged in gas hydrates；The monitoring system is used for air supply system described in real-time collecting, supplied
Liquid system, simulation system, flood pattern, production system running parameter, data caused by writing task parameter, and pass through monitoring
System controls experimental implementation.
The device for arranging a kind of above-mentioned simulation formula horizontal well chemical flooding exploitation of gas hydrate below is carried out further
Description：
As shown in Fig. 2 in the present embodiment, air supply system includes natural gas bottle 1, control valve 2, supercharging device 3, gas stream
Gauge 4, pressure sensor 5, temperature sensor 6, high pressure line 7, tap valve 8.
The outlet of natural gas bottle 1 is connected to the entrance of supercharging device 3 by high pressure line 7, and control valve 2 is located at natural gas bottle 1
Between supercharging device 3, regulation natural gas feed speed effect is played, the outlet of supercharging device 3 is connected to point by high pressure line 7
The entrance of valve 8 is connect, gas flowmeter 4, pressure sensor 5, temperature sensor 6 are located between supercharging device 3 and tap valve 8,
Play a part of monitoring gas flow, pressure, temperature, the outlet of tap valve 8 is connected with the simulation system, as to simulation
System supplies natural gas.
As shown in figure 3, in the present embodiment, liquid-supplying system includes water storage device 9, control valve 2, supercharging device 3, liquid flow
Gauge 10, pressure sensor 5, temperature sensor 6, high pressure line 7, tap valve 8.
The outlet of water storage device 9 is connected to the entrance of supercharging device 3 by high pressure line 7, and control valve 2 is located at water storage device 9
Between supercharging device 3, the feed speed effect of regulation water is played, the outlet of supercharging device 3 is connected to tap valve by high pressure line 7
8 entrances of door, fluid flowmeter 10, pressure sensor 5, temperature sensor 6 are located between supercharging device 3 and tap valve 8, played
The effect of fluid flow, pressure, temperature is monitored, the outlet of tap valve 8 is connected with the simulation system, as to simulation system
Supply water.
As shown in figure 4, in the present embodiment, flood pattern includes water storage device 9, control valve 2, supercharging device 3, liquid flow
Gauge 10, pressure sensor 5, temperature sensor 6, high pressure line 7, three-way connection 12, check-valves 11, methanol intermediate receptacle 13,
Ethanol intermediate receptacle 14, agitating device 15, tap valve 8, water injection well attachment means 16.
The outlet of water storage device 9 is connected to the entrance of supercharging device 3 by high pressure line 7, and control valve 2 is located at water storage device 9
Between supercharging device 3, the feed speed effect of regulation driven water-replacing is played, the outlet of supercharging device 3 is connected to three by high pressure line 7
The entrance of pass joint 12, fluid flowmeter 10, pressure sensor 5, temperature sensor 6, check-valves 11 are located at supercharging device 3 and threeway
Between joint 12, play a part of monitoring displacement water-carrying capacity, pressure, temperature, and prevent driven water-replacing from flowing back；Methanol intermediate receptacle
13rd, the outlet of ethanol intermediate receptacle 14 is connected to the entrance of supercharging device 3 by high pressure line 7, and control valve 2 is located among methanol and held
Between device 13, ethanol intermediate receptacle 14 and supercharging device 3, methanol intermediate receptacle 13, the exit of ethanol intermediate receptacle 14 are provided with only
Valve 11 is returned, prevents liquid from flowing back, the outlet of supercharging device 3 connects the entrance of agitating device 15 by high pressure line 7, and agitating device 15 is used
Chemical agent is uniformly made in the liquid agitation for feeding supercharging device 3, the outlet of agitating device 15 is connected to three by high pressure line 7
The entrance of pass joint 12, fluid flowmeter 10, pressure sensor 5, temperature sensor 6, check-valves 11 are located at agitating device 15 and three
Between pass joint 12, play a part of the chemical agent flux of monitoring, pressure, temperature, and prevent chemical agent from flowing back；Three-way connection logical 12
Cross high pressure line 7 and be connected to tap valve 8, tap valve 8 is connected to water injection well attachment means 16, water filling by high pressure line 7
Well attachment means 16 are connected with the simulation system.
As shown in figure 5, in the present embodiment, production system includes producing well attachment means 17, tap valve 8, control valve
2nd, pressure sensor 5, temperature sensor 6, high pressure line 7, back-pressure valve 18, gas-liquid separator 19, water storage device 9, among gas
Container 20.
Producing well attachment means 17 are connected with tap valve 8 by high pressure line 7, the entrance of back-pressure valve 18 and tap valve 8
Connected by high pressure line 7, control valve 2, pressure sensor 5, temperature sensor 6 positioned at tap valve 8 and back-pressure valve 18 it
Between, play a part of monitoring output object pressure, temperature, back-pressure valve 18 plays the effect of simulated formation pressure, and the back-pressure valve 18 goes out
Mouth is connected with gas-liquid separator 19, and output object is implemented gas-liquid separation by gas-liquid separator 19, and output water is fed into water storage dress
9 are put, output gas feeds gas intermediate receptacle 20, and producing well attachment means 17 are connected with simulation system, simulation system work production
Raw output object enters production system by producing well attachment means 17.
As shown in fig. 6, in the present embodiment, simulation system include insulating box 21, reaction vessel 22, simulation water injection well 23,
Simulated production well head 24, air supply inlet 25, feed flow entrance 26, temperature measuring equipment 27, pressure tester 28, bolt hole 29, upper cover plate 30,
Simulation wellbore hole 31, simulation sand body 32.
Reaction vessel 22 is the high pressure resistant clear sheet of cuboid, and upper cover plate 30 is located at the top of reaction vessel 22, by bolt hole
The 29 cuboid confined spaces formed with bolt seal, simulation water injection well 23, simulated production well head 24, temperature measuring equipment 27, survey
Pressure device 28 is respectively positioned on the surface of upper cover plate 30, and the air supply inlet 25, feed flow entrance 26 are located at the surface of reaction vessel 22, simulate sand
Body 32 is located inside reaction vessel 22, and simulation wellbore hole 31 is inside simulation sand body 32, the temperature measuring equipment 27 and the pressure measurement
Device 28 positioned at simulation sand body 32 inside, the reaction vessel 22, simulation water injection well 23, simulated production well head 24, supply into
Mouth 25, feed flow entrance 26, temperature measuring equipment 27, pressure tester 28, bolt hole 29, upper cover plate 30, simulation wellbore hole 31, simulation sand body 32
It is respectively positioned in insulating box 21.
As shown in fig. 7, it is simulation system side view, in the surface air supply inlet 25 of reaction vessel 22, feed flow entrance 26 in mistake
Position alignment branch, as shown in figure 8, arranging schematic diagram, simulation water injection well 23, simulated production well head 24, thermometric dress for upper cover plate
The branch of 27, pressure tester 28 is put in the surface of upper cover plate 30, in reverse alignment branch row's formula horizontal-well network.
As shown in figure 9, be simulation wellbore hole structural representation, simulation wellbore hole 31 include stainless steel tube 38, sealing original paper 34 and
Drawing out type filler 33, simulation wellbore hole 31 is fixed on the surface of upper cover plate 30 by sealing original paper 34, stainless steel tube 38 includes
Straight well section 35, dummy level section 36 and analogue perforation 37 are simulated, to simulate the horizontal well in gas hydrates storage.
Row's formula horizontal-well network that the simulation system can be simulated has following several arrangement modes：
As shown in Figure 10, it is dummy level well pattern aligned fashion schematic diagram in the same direction, dummy level water injection well 39 and simulation water
Flat producing well 40 is distributed in the same direction, and the horizontal segment of dummy level water injection well 39 is in laterally aligned point with the horizontal segment of dummy level producing well 40
Cloth；
As shown in figure 11, it is the reverse aligned fashion schematic diagram of dummy level well pattern, dummy level water injection well 39 and simulation water
Flat producing well 40 is reversely distributed, and the horizontal segment of dummy level water injection well 39 is in laterally aligned point with the horizontal segment of dummy level producing well 40
Cloth；
As shown in figure 12, it is dislocatedly distributed in the same direction schematic diagram A, dummy level water injection well 39 and simulation water for dummy level well pattern
Flat producing well 40 is distributed in the same direction, and the horizontal segment of dummy level water injection well 39 is with the horizontal segment of dummy level producing well 40 in transversion malposition point
Cloth, and positioned at rear at the heel of dummy level producing well 40 at the heel of dummy level water injection well 39；
As shown in figure 13, it is dislocatedly distributed in the same direction schematic diagram B, dummy level water injection well 39 and simulation water for dummy level well pattern
Flat producing well 40 is distributed in the same direction, and the horizontal segment of dummy level water injection well 39 is with the horizontal segment of dummy level producing well 40 in transversion malposition point
Cloth, and it is located at front at the heel of dummy level producing well 40 at the heel of dummy level water injection well 39；
As shown in figure 14, reversely it is dislocatedly distributed schematic diagram A, dummy level water injection well 39 and simulation water for dummy level well pattern
Flat producing well 40 is reversely distributed, and the horizontal segment of dummy level water injection well 39 is with the horizontal segment of dummy level producing well 40 in transversion malposition point
Cloth, and it is located at front at the tiptoe of dummy level producing well 40 at the heel of dummy level water injection well 39；
As shown in figure 15, reversely it is dislocatedly distributed schematic diagram B, dummy level water injection well 39 and simulation water for dummy level well pattern
Flat producing well 40 is reversely distributed, and the horizontal segment of dummy level water injection well 39 is with the horizontal segment of dummy level producing well 40 in transversion malposition point
Cloth, and positioned at rear at the tiptoe of dummy level producing well 40 at the heel of dummy level water injection well 39；
Row's formula horizontal-well network depth that the simulation system can be simulated has following several ways, is water as shown in figure 16
Flat section depth schematic diagram：
Figure 16 A are that the horizontal segment depth of setting of dummy level water injection well 39 is less than the horizontal segment tripping in of dummy level producing well 40 depth
Degree；
Figure 16 B are that the horizontal segment depth of setting of dummy level water injection well 39 is equal to the horizontal segment tripping in of dummy level producing well 40 depth
Degree；
Figure 16 C are that the horizontal segment depth of setting of dummy level water injection well 39 is more than the horizontal segment tripping in of dummy level producing well 40 depth
Degree.
In the present embodiment, the monitoring system includes computer (in figure not depending on) and transmission cable (not regarded in figure), institute
Air supply system, liquid-supplying system, simulation system, flood pattern, production system is stated by transmission cable with computer to be connected, to
Real-time collecting temperature, pressure, output logistics capacity and other experimental datas in experimentation, and controlled and tested by monitoring system
Operation.
Device of embodiment of the present invention workflow is introduced as follows below based on above-mentioned accompanying drawing, work of the embodiment of the present invention
It is divided into following steps as flow：
Step 1：Actual gas hydrates are simulated by simulation system to store, the filling simulation sand in reaction vessel 22
Body 32 paves compacting, some simulation wellbore holes 31 of tripping in during sand body 32 is simulated in filling, to the row's of simulation formula horizontal-well network,
Simulation water injection well 23, simulated production well head 24 are connected with upper cover plate 30, sealed, by under temperature measuring equipment 27 and pressure tester 28
Enter to simulate inside sand body 32, temperature measuring equipment 27 and pressure tester 28 are connected with upper cover plate 30, sealed, passes through bolt hole 29 and spiral shell
Reaction vessel 22 and upper cover plate 30 are carried out bolt seal and form simulated formation space by bolt, and simulation system is put into insulating box 21；
Simulation sand body 32 dosage, the length of simulation wellbore hole 31 and depth of setting and other conventional parameters are adjusted according to actual storage parameter
It is whole.
Natural gas and water generation gas hydrates, supply are fed into simulation system by air supply system, liquid-supplying system
Supercharging device 3 in system, liquid-supplying system provides operating pressure for simulation system, and insulating box 21 is adjusted to analog temperature, will
Control valve 2 is opened in air supply system, and natural gas enters in supercharging device 3 and is pressurized in natural gas bottle 1, is connected by tapping valve 8
Air supply inlet 25 in grafting simulation system, open supercharging device 3 and feed natural gas in simulation system, pass through gas flowmeter 4, pressure
Monitoring supply parameter, infeed natural gas close tap valve 8 with shape after reaching scheduled volume in real time for force snesor 5, temperature sensor 6
Into confined space；Control valve in liquid-supplying system 2 is opened, supply water, which enters in supercharging device 3, in water storage device 9 is pressurized, and leads to
Cross tap valve 8 and connect feed flow entrance 26 in simulation system, opening supercharging device 3 will supply in water infeed simulation system, pass through
Fluid flowmeter 10, pressure sensor 5, temperature sensor 6 monitor feed flow parameter in real time, and supply water reaches closing point after scheduled volume
Valve 8 is connect to form confined space；After natural gas and supply water enter simulation system, simulation system constant temperature is placed, it is to be generated
Into gas hydrates physical property it is stable after carry out next step operation.
Step 2：Decompression exploitation is implemented by production system, drawing out type filler 33 in simulation wellbore hole 31 is extracted out；Will
Producing well attachment means 17 are connected respectively with simulation water injection well 23, simulated production well head 24 in production system, by back-pressure valve 18
Simulated storage pressure is modulated, control valve 2 is opened, implements simulation decompression exploitation, it is real to output object by gas-liquid separator 19
Gas-liquid separation is applied, recovered water is collected by water storage device 9, output gas is collected by gas intermediate receptacle 20,
Pass through pressure sensor 5, temperature sensor 6 the decompression operational parameter of record simulation in real time；By temperature measuring equipment in simulation system 27,
Operational parameter in simulation system in the recovery process of record decompression in real time of pressure tester 28.
Step 3：Chemical flooding is implemented to simulation system by flood pattern, by simulation water injection well 23 and flood pattern
Water injection well attachment means 16 are connected, and open the control valve 2 being connected with water storage device 9, and driven water-replacing enters increasing in water storage device 9
It is pressurized in pressure device 3, enter three-way connection 12 by check-valves 11 injects simulation water injection well 23 by driven water-replacing, passes through liquid flow
Gauge 10, pressure sensor 5, temperature sensor 6 monitor injection parameter in real time, feed after driven water-replacing reaches scheduled volume and close regulation
Valve 2；Added in agitating device 15 and prepare water, open the regulating valve being connected with methanol intermediate receptacle 13, ethanol intermediate receptacle 14
Door 2, feeds agitating device 15, being agitated to form in agitating device 15 by predetermined amount by methanol, ethanol by supercharging device 3
Agent is learned, enter three-way connection 12 by check-valves 11 injects simulation water injection well 23 by chemical agent, passes through fluid flowmeter 10, pressure
Force snesor 5, temperature sensor 6 monitor injection parameter in real time, feed after chemical agent reaches scheduled volume and close control valve 2；Weight
Above-mentioned steps are answered to realize that driven water-replacing, chemical agent alternately inject.
Output object collection is implemented by the production system being connected with simulated production well head 24, back-pressure valve 18 is modulated into simulation storage
Pressure is hidden, control valve 2 is opened, gas-liquid separation is implemented to output object by gas-liquid separator 19, by water storage device 9 to adopting
Water outlet is collected, and output gas is collected by gas intermediate receptacle 20, real by pressure sensor 5, temperature sensor 6
Shi Jilu simulation decompression operational parameters；Recorded in real time in recovery process by temperature measuring equipment in simulation system 27, pressure tester 28
Operational parameter in simulation system.
Above-mentioned steps carry out during, the monitoring system by temperature measuring equipment 27, pressure tester 28, pressure sensor 5,
Temperature sensor 6, gas flowmeter 4, fluid flowmeter 10 are monitored in real time, and record each stage design parameter of experiment,
Experimentation is manipulated by connecting control valve 2.
Particular embodiments described above, the purpose of the present invention, technical scheme and beneficial effect are carried out further in detail
Describe in detail it is bright, should be understood that the foregoing is only the present invention specific embodiment, the guarantor being not intended to limit the present invention
Scope is protected, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., should be included in this
Within the protection domain of invention.
Claims (8)
- A kind of 1. device for simulating row's formula horizontal well chemical flooding exploitation of gas hydrate, it is characterised in that the experimental provision Including air supply system, liquid-supplying system, simulation system, flood pattern, production system and monitoring system；Wherein described air supply system is connected with simulation system, and the liquid-supplying system is connected with simulation system, the water filling system System is connected with simulation system, and the production system is connected with simulation system, and the monitoring system is respectively with the supply System, liquid-supplying system, simulation system, flood pattern are connected with production system；The air supply system is used to provide natural gas for synthesis of natural gas hydrate inside the simulation system；The liquid-supplying system For providing water for synthesis of natural gas hydrate inside the simulation system；The flood pattern is used to note for the simulation system Enter driven water-replacing and chemical agent, to simulate water injection well in actual production；The production system is used to produce in the simulation system Caused natural gas and water, and the output gas yield, aquatic products amount are analyzed, to simulate producing well in actual production；The mould Plan system is used to simulate gas hydrates pressure, temperature, saturation degree, permeability and conventional formation parameter, and simulates in day Right gas hydrate arranges formula horizontal well hole pattern in hiding；The monitoring system is used for air supply system, feed flow system described in real-time collecting System, simulation system, flood pattern, production system running parameter, data caused by writing task parameter, and pass through monitoring system Control experimental implementation.
- 2. a kind of device for simulating row's formula horizontal well chemical flooding exploitation of gas hydrate as claimed in claim 1, its feature It is, the air supply system includes natural gas bottle, control valve, supercharging device, gas flowmeter, pressure sensor, temperature and passed Sensor, high pressure line, tap valve；Natural gas bottle outlet is connected to supercharging device entrance by high pressure line, and control valve is located at natural gas bottle and supercharging device Between, the feed speed effect of regulation natural gas is played, supercharging device outlet is connected to tap valve inlet, gas by high pressure line Flowmeter body, pressure sensor, temperature sensor are located between supercharging device and tap valve, play monitoring gas flow, pressure The effect of power, temperature, tap valve export are connected with the simulation system.
- 3. a kind of device for simulating row's formula horizontal well chemical flooding exploitation of gas hydrate as claimed in claim 1, its feature It is, the liquid-supplying system includes water storage device, control valve, supercharging device, fluid flowmeter, pressure sensor, temperature and passed Sensor, high pressure line, tap valve；Water storage device outlet is connected to supercharging device entrance by high pressure line, and control valve is located at water storage device and supercharging device Between, the feed speed effect of regulation water is played, supercharging device outlet is connected to tap valve inlet, liquid flow by high pressure line Gauge, pressure sensor, temperature sensor are located between supercharging device and tap valve, play monitoring fluid flow, pressure, temperature The effect of degree, tap valve export are connected with the simulation system.
- 4. a kind of device for simulating row's formula horizontal well chemical flooding exploitation of gas hydrate as claimed in claim 1, its feature It is, the flood pattern includes water storage device, control valve, supercharging device, fluid flowmeter, pressure sensor, temperature and passed Sensor, high pressure line, three-way connection, check-valves, liquid intermediate receptacle, agitating device, tap valve, water injection well attachment means；Water storage device outlet is connected to supercharging device entrance by high pressure line, and control valve is located at water storage device and supercharging device Between, the feed speed effect of regulation driven water-replacing is played, supercharging device outlet is connected to three-way connection entrance, liquid by high pressure line Flowmeter body, pressure sensor, temperature sensor, check-valves play monitoring displacement between supercharging device and three-way connection The effect of water-carrying capacity, pressure, temperature, and prevent driven water-replacing from flowing back；The outlet of liquid intermediate receptacle is connected to increasing by high pressure line It is pressed posting port, control valve plays the feed speed effect of regulation liquid, liquid between liquid intermediate receptacle and supercharging device Body intermediate receptacle exit is provided with check-valves, prevents liquid from flowing back, and supercharging device outlet connects agitating device by high pressure line Entrance, agitating device are used to the liquid agitation that supercharging device is fed chemical agent is uniformly made, and agitating device outlet passes through high pressure Pipeline is connected to three-way connection entrance, fluid flowmeter, pressure sensor, temperature sensor, check-valves be located at agitating device with Between three-way connection, play a part of the chemical agent flux of monitoring, pressure, temperature, and prevent chemical agent from flowing back；Three-way connection passes through High pressure line is connected to tap valve, and tap valve is connected to water injection well attachment means, water injection well connection dress by high pressure line Put and be connected with the simulation system.
- 5. a kind of device for simulating row's formula horizontal well chemical flooding exploitation of gas hydrate as claimed in claim 1, its feature Be, the production system include producing well attachment means, tap valve, control valve, pressure sensor, temperature sensor, High pressure line, back-pressure valve, gas-liquid separator, water storage device, gas intermediate receptacle；Producing well attachment means are connected with tap valve by high pressure line, and back pressure valve inlet passes through high pressure line with tap valve Connection, control valve, pressure sensor, temperature sensor play monitoring output object pressure between tap valve and back-pressure valve The effect of power, temperature, back-pressure valve play the effect of simulated formation pressure, and the back pressure valve outlet is connected with gas-liquid separator, gas Output object is implemented gas-liquid separation by liquid/gas separator, and output water is fed into water storage device, and output gas feeds gas intermediate receptacle；It is raw Production well attachment means are connected with simulation system, and output object caused by simulation system work is entered by producing well attachment means gives birth to Production system.
- 6. a kind of device for simulating row's formula horizontal well chemical flooding exploitation of gas hydrate as claimed in claim 1, its feature It is, the simulation system includes insulating box, reaction vessel, simulation water injection well, simulated production well head, air supply inlet, feed flow Entrance, temperature measuring equipment, pressure tester, bolt hole, upper cover plate, simulation wellbore hole, simulation sand body；Reaction vessel is the high pressure resistant clear sheet of cuboid, and the upper cover plate is located at the reaction vessel top, used by bolt hole The cuboid confined space that bolt seal is formed, simulation water injection well, simulated production well head, temperature measuring equipment interface, pressure tester Interface is respectively positioned on upper cover plate surface, and the air supply inlet, feed flow entrance are located at reaction vessel surface, and simulation sand body holds positioned at reaction Inside device, inside simulation sand body, the temperature measuring equipment and the pressure tester are located in simulated formation sand body simulation wellbore hole Portion, the reaction vessel, simulation water injection well, simulated production well head, air supply inlet, feed flow entrance, temperature measuring equipment, pressure measurement dress Put, bolt hole, upper cover plate, simulation wellbore hole, simulation sand body be respectively positioned in insulating box；Valve is tapped in the air supply system by high pressure line with air supply inlet to be connected, and valve is tapped in the liquid-supplying system institute Door is connected by high pressure line with feed flow entrance, and water injection well attachment means are connected with simulation water injection well in the flood pattern Connect, producing well attachment means are connected with simulated production well head in the production system.
- 7. a kind of device for simulating row's formula horizontal well chemical flooding exploitation of gas hydrate as claimed in claim 1, its feature It is, horizontal water injection well and horizontal production well direction can be in the same direction or reverse in row's formula horizontal-well network； Horizontal water injection well and the horizontal segment of horizontal production well can be isometric or non-isometric in row's formula horizontal-well network 's；Horizontal water injection well can be aligned fashion with horizontal production well or be dislocatedly distributed in row's formula horizontal-well network 's；The horizontal flood well horizontal segment depth can be contour, the horizontal note with the horizontal production well horizontal segment depth Well horizontal segment can also be located above or below the horizontal production well horizontal segment.
- 8. a kind of device for simulating row's formula horizontal well chemical flooding exploitation of gas hydrate as claimed in claim 1, its feature It is, the monitoring system includes computer and transmission cable, the air supply system, liquid-supplying system, simulation system, water filling system System, production system are connected by transmission cable with computer, to real-time collecting temperature, pressure, output in experimentation Logistics capacity and other experimental datas, and experimental implementation is controlled by monitoring system.
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