CN107503715A - A kind of device for simulating parallel water horizontal well seawater injection exploitation of gas hydrate - Google Patents
A kind of device for simulating parallel water horizontal well seawater injection exploitation of gas hydrate Download PDFInfo
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- CN107503715A CN107503715A CN201710992326.0A CN201710992326A CN107503715A CN 107503715 A CN107503715 A CN 107503715A CN 201710992326 A CN201710992326 A CN 201710992326A CN 107503715 A CN107503715 A CN 107503715A
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- simulation
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- seawater
- high pressure
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
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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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0099—Equipment or details not covered by groups E21B15/00 - E21B40/00 specially adapted for drilling for or production of natural hydrate or clathrate gas reservoirs; Drilling through or monitoring of formations containing gas hydrates or clathrates
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- 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
- E21B43/30—Specific pattern of wells, e.g. optimizing the spacing of wells
- E21B43/305—Specific pattern of wells, e.g. optimizing the spacing of wells comprising at least one inclined or horizontal well
-
- 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
Abstract
The invention discloses a kind of device for simulating parallel water horizontal well seawater injection exploitation of gas hydrate, it is related to gas hydrates development field, is particularly used for simulating a kind of indoor experimental apparatus of parallel water horizontal well seawater injection exploitation of gas hydrate.Device includes air supply system, liquid-supplying system, simulation system, seawater injection system, production system and monitoring system, apparatus of the present invention use main body of the back-up sand case as simulation system, pass through air supply system, liquid-supplying system supplies natural gas into simulation system and water forms gas hydrates, seawater is injected by seawater injection system to exploit to simulate seawater injection, 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 is implemented to simulate using three dimensional constitution to seawater injection exploitation of gas hydrate, there is certain directive function to the research of gas hydrates seawater injection withdrawal mechanism.
Description
Technical field
The invention discloses a kind of device for simulating parallel water horizontal well seawater injection 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 parallel water horizontal well seawater injection 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, pass through the axle frac system of hydrate core three, pressure break seawater injection system, natural gas extraction system and sound emission
Monitoring system implements gas hydrates simulated experiment.CN101246117B announces a kind of gas hydrates synthesis and macroforce
Property comprehensive experimental system is learned, passes through gas hydrates synthesis module, mechanical property experiment module and microscopic measurement module pair
Gas hydrates carry out simulated experiment.Above-mentioned patent equipment can not simulation water horizontal well exploitation of gas hydrate, and can not reach
To visualized experiment.CN105909224A announces a kind of experiment of dual horizontal well electrical heating secondary buck exploitation of gas hydrate
Device 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 use power system heated natural gas hydrate merely
Storage can not simulate horizontal well displacement operation in actual production.In view of this, the present inventor proposes a kind of simulation parallel water horizontal well
The device of seawater injection exploitation of gas hydrate, to meet the requirement of current three-dimensional simulation experimental provision, and overcome prior art
The defects of, and apparatus of the present invention main body is transparent visual material, seawater injection exploitation of gas hydrate can be carried out finer
Observation.
The content of the invention
The invention discloses a kind of device for simulating parallel water horizontal well seawater injection exploitation of gas hydrate, device includes supplying
Gas system, liquid-supplying system, simulation system, seawater injection system, production system and monitoring system, apparatus of the present invention use back-up sand case
As the main body of simulation system, natural gas is supplied into simulation system by air supply system, liquid-supplying system and water forms natural gas
Hydrate, seawater is injected by seawater injection system and exploited with simulating seawater injection, produced gas and water are implemented to receive by production system
Collection, complete monitoring is implemented to experimentation by monitoring system, experimental provision of the present invention is exploited using three dimensional constitution to seawater injection
Gas hydrates implement simulation, have certain directive function to the research of gas hydrates seawater injection withdrawal mechanism.
Wherein described air supply system is connected with simulation system, and the liquid-supplying system is connected with simulation system, the note
Sea water service system is connected with simulation system, and the production system is connected with simulation system, the monitoring system respectively with it is described
Air supply system, liquid-supplying system, simulation system, seawater injection system 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；It is the simulation that the seawater injection system, which is used for,
System injects seawater, to simulate water injection well in actual production；The production system is used to produce to produce in the simulation system
Natural gas and water, and the output gas yield, aquatic products amount are analyzed, to simulate producing well in actual production；The simulation system
Unite for simulating gas hydrates pressure, temperature, saturation degree, permeability and conventional formation parameter, and simulate in natural gas
Parallel water horizontal well hole pattern during hydrate is hidden；The monitoring system is used for air supply system, liquid-supplying system, mould described in real-time collecting
Plan system, seawater injection system, production system running parameter, data caused by writing task parameter, and pass through monitoring system control
Experimental implementation processed.
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, seawater injection system of the invention includes water storage device, filter, heater, control valve, supercharging
Device, fluid flowmeter, pressure sensor, temperature sensor, high pressure line, check-valves, water injection well attachment means；Water storage device
Outlet is connected to filter entrance by high pressure line, and filter outlet is connected to heater by high pressure line, added
Thermal is connected to supercharging device by high pressure line, and water storage device, filter, heater play storage, filtering, heating
Seawater eroding, ocean temperature, such as 20-35 degrees Celsius of surface seawater temperature are injected in actual well site environment to simulate；Regulation
Valve plays the speed effect of regulation sea water supply between heater and supercharging device, and supercharging device outlet passes through high pressure
Pipeline is connected to water injection well attachment means, and fluid flowmeter, pressure sensor, temperature sensor, check-valves are located at supercharging device
Between water injection well attachment means, play a part of monitoring seawater flow, pressure, temperature, and prevent seawater from flowing back, water injection well connects
Connection device is connected with the simulation system.
In the seawater injection system water storage device include water bottle, intermediate receptacle, beaker and other there is the normal of water storage function
Advise laboratory experiment equipment, the filter include water purifier, filter and other have filtering function conventional chambers test
Equipment, the heater include electric heater, gas heater and other have liquid heating function conventional chambers test
Equipment, the control valve be with signal transmission and remote control function traditional regulation valve arrangement, the fluid flow
Meter, pressure sensor, temperature sensor are the conventional chambers experimental facilities with signal transfer functions, and the supercharging device can be with
It is constant speed pump group, constant current pump group, constant pressure pump group and other application in the pump group of laboratory experiment, the check-valves is with individual event
The conventional chambers experimental facilities of circulating function, the water injection well attachment means are with connection simulation water injection well and sealing function
Conventional chambers experimental facilities.
Preferably, production system of the invention includes producing well attachment means, control valve, pressure sensor, temperature biography
Sensor, high pressure line, back-pressure valve, gas-liquid separator, water storage device, gas intermediate receptacle；Back pressure valve inlet is connected with producing well
Device is connected by high pressure line, and control valve, pressure sensor, temperature sensor are located at producing well attachment means and back-pressure valve
Between, play a part of monitoring output object pressure, temperature, back-pressure valve plays the effect of simulated formation pressure, the back pressure valve outlet
It is connected with gas-liquid separator, output object is implemented gas-liquid separation by gas-liquid separator, and output water is fed into water storage device, output
Gas feeds gas intermediate receptacle；Producing well attachment means are connected with simulation system, and output object caused by simulation system work leads to
Cross producing well attachment means and enter production system.
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 control valve be with signal transmission and remote control function traditional regulation valve arrangement, the pressure
Force snesor, temperature sensor are the conventional chambers experimental facilities with signal transfer functions, and the back-pressure valve is with back pressure
The conventional chambers experimental facilities of function, the gas-liquid separator are the conventional chambers experimental facilities with gas-liquid separating function, institute
State water storage device include water bottle, intermediate receptacle, beaker and other there is 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, and the length range on each of which side is 1-2m, thick
Degree scope is 3-10cm, highest simulated storage pressure 35Mpa, and the reaction vessel and upper cover plate contact surface are provided with sealing ring, use
In increase simulation system sealing, the sealing ring material is high pressure resistant rubber, and the temperature measuring equipment is with temperature monitoring work(
The conventional chambers experimental facilities of energy and signal transfer functions, the pressure tester are to transmit work(with pressure monitoring function and signal
The conventional chambers experimental facilities of energy, the simulation sand body include quartz sand, sea bottom core powder and other conventional simulations 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.
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 seawater injection system
Mouth is connected, and 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, seawater injection system, production system are connected by transmission cable with computer, to be gathered in real time in experimentation
Temperature, pressure, output logistics capacity and other experimental datas, and experimental implementation is controlled by monitoring system.
A kind of device beneficial effect of simulation parallel water horizontal well seawater injection 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) seawater injection system and production system of the present invention are all connected to the simulation wellbore hole entrance on upper cover plate surface, and simulate well
Cylinder is in parallel water horizontal well formula branch in reaction vessel interior, can more accurately simulate parallel water horizontal well in actual production and exploit day
The design parameter of right gas hydrate.
3) reaction vessel main body is transparent, the hydration it is observed that seawater injection 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 seawater injection 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.
6) use based on seawater injection system, effectively seawater injection exploitation of gas hydrate in actual well site environment can be entered
Row simulation, seawater injection can be simulated in the case of different temperatures, injection rate, injection rate to the shadow of gas hydrates recovery ratio
Ring.
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 seawater injection system 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.
Drawing reference numeral：1st, natural gas bottle 2, control valve 3, supercharging device 4, gas flowmeter 5, pressure sensor 6, temperature
Sensor 7, high pressure line 8, tap valve 9, water storage device 10, fluid flowmeter 11, filter 12, heater 13, only
Return valve 14, water injection well attachment means 15, producing well attachment means 16, back-pressure valve 17, gas-liquid separator 18, gas intermediate receptacle
19th, insulating box 20, reaction vessel 21, simulation water injection well 22, simulated production well head 23, air supply inlet 24, feed flow entrance 25, survey
Warm device 26, pressure tester 27, bolt hole 28, upper cover plate 29, simulation wellbore hole 30, simulation sand body 31, drawing out type filler 32,
Seal original paper 33, simulation straight well section 34, dummy level section 35, analogue perforation 36, stainless steel tube.
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 parallel water horizontal well seawater injection exploitation of gas hydrate of the present invention
Structure schematic diagram, including air supply system, liquid-supplying system, simulation system, seawater injection system, production system and monitoring system；Wherein
The air supply system is connected with simulation system, and the liquid-supplying system is connected with simulation system, the seawater injection system and mould
Plan system is connected, and the production system is connected with simulation system, the monitoring system respectively with the air supply system, feed flow
System, simulation system, seawater injection system 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；It is the simulation that the seawater injection system, which is used for,
System injects seawater, to simulate water injection well in actual production；The production system is used to produce to produce in the simulation system
Natural gas and water, and the output gas yield, aquatic products amount are analyzed, to simulate producing well in actual production；The simulation system
Unite for simulating gas hydrates pressure, temperature, saturation degree, permeability and conventional formation parameter, and simulate in natural gas
Parallel water horizontal well hole pattern during hydrate is hidden；The monitoring system is used for air supply system, liquid-supplying system, mould described in real-time collecting
Plan system, seawater injection system, production system running parameter, data caused by writing task parameter, and pass through monitoring system control
Experimental implementation processed.
A kind of device of above-mentioned simulation parallel water horizontal well seawater injection exploitation of gas hydrate is carried out further below
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, seawater injection system includes water storage device 9, filter 11, heater 12, tune
Save valve 2, supercharging device 3, fluid flowmeter 10, pressure sensor 5, temperature sensor 6, high pressure line 7, check-valves 13, note
Well attachment means 14.
The outlet of water storage device 9 is connected to the entrance of filter 11 by high pressure line 7, and the outlet of filter 11 passes through high pressure
Pipeline 7 is connected to heater 12, and heater 12 is connected to supercharging device 3, water storage device 9, filtering dress by high pressure line 7
Put 11, heater 12 and play storage, filtering, heating seawater effect, control valve 2 is located at heater 12 and supercharging device 3
Between, the speed effect of regulation sea water supply is played, the outlet of supercharging device 3 is connected to water injection well attachment means by high pressure line 7
14, fluid flowmeter 10, pressure sensor 5, temperature sensor 6, check-valves 13 are located at supercharging device 3 and water injection well attachment means
Between 14, play a part of monitoring seawater flow, pressure, temperature, and prevent seawater from flowing back, water injection well attachment means 14 with it is described
Simulation system is connected.
As shown in figure 5, in the present embodiment, production system includes producing well attachment means 15, control valve 2, pressure sensing
Device 5, temperature sensor 6, high pressure line 7, back-pressure valve 16, gas-liquid separator 17, water storage device 9, gas intermediate receptacle 18.
The entrance of back-pressure valve 16 is connected with producing well attachment means 15 by high pressure line 7, control valve 2, pressure sensor
5th, temperature sensor 6 plays monitoring output object pressure, the work of temperature between producing well attachment means 15 and back-pressure valve 16
With back-pressure valve 16 plays the effect of simulated formation pressure, and the outlet of back-pressure valve 16 is connected with gas-liquid separator 17, gas-liquid separation
Output object is implemented gas-liquid separation by device 17, and output water is fed into water storage device 9, and output gas feeds gas intermediate receptacle 18, raw
Production well attachment means 15 are connected with simulation system, and output object caused by simulation system work is entered by producing well attachment means 15
Enter production system.
As shown in fig. 6, in the present embodiment, simulation system include insulating box 19, reaction vessel 20, simulation water injection well 21,
Simulated production well head 22, air supply inlet 23, feed flow entrance 24, temperature measuring equipment 25, pressure tester 26, bolt hole 27, upper cover plate 28,
Simulation wellbore hole 29, simulation sand body 30.
Reaction vessel 20 is the high pressure resistant clear sheet of cuboid, and upper cover plate 28 is located at the top of reaction vessel 20, by bolt hole
The 27 cuboid confined spaces formed with bolt seal, simulation water injection well 21, simulated production well head 22, temperature measuring equipment 25, survey
Pressure device 26 is respectively positioned on the surface of upper cover plate 28, and the air supply inlet 23, feed flow entrance 24 are located at the surface of reaction vessel 20, simulate sand
Body 30 is located inside reaction vessel 20, and simulation wellbore hole 29 is inside simulation sand body 30, the temperature measuring equipment 25 and the pressure measurement
Device 26 positioned at simulation sand body 30 inside, the reaction vessel 20, simulation water injection well 21, simulated production well head 22, supply into
Mouth 23, feed flow entrance 24, temperature measuring equipment 25, pressure tester 26, bolt hole 27, upper cover plate 28, simulation wellbore hole 29, simulation sand body 30
It is respectively positioned in insulating box 19.
As shown in fig. 7, it is simulation system side view, in the surface air supply inlet 23 of reaction vessel 20, feed flow entrance 24 in mistake
Position alignment branch, as shown in figure 8, arranging schematic diagram, simulation water injection well 21, simulated production well head 22, thermometric dress for upper cover plate
The branch of 25, pressure tester 26 is put in the surface of upper cover plate 28.
As shown in figure 9, be simulation wellbore hole structural representation, simulation wellbore hole 29 include stainless steel tube 36, sealing original paper 32 and
Drawing out type filler 31, simulation wellbore hole 29 is fixed on the surface of upper cover plate 28 by sealing original paper 32, stainless steel tube 36 includes
Straight well section 33, dummy level section 34 and analogue perforation 35 are simulated, to simulate the horizontal well in gas hydrates storage.
In the present embodiment, the monitoring system includes computer (in figure not depending on) and transmission cable (not regarded in figure), institute
State air supply system, liquid-supplying system, simulation system, seawater injection system, production system by transmission cable with computer to be connected, use
With real-time collecting temperature, pressure, output logistics capacity and other experimental datas in experimentation, and controlled in fact by monitoring system
Test 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 20
Body 30 paves compacting, two simulation wellbore holes 29 of tripping in during sand body 30 is simulated in filling, simulation water injection well 21, simulation is given birth to
Production well head 22 is connected with upper cover plate 28, sealed, inside temperature measuring equipment 25 and the tripping in of pressure tester 26 simulation sand body 30, by thermometric
Device 25 and pressure tester 26 are connected with upper cover plate 28, sealed, by bolt hole 27 and bolt by reaction vessel 20 and upper cover plate
28, which carry out bolt seal, forms simulated formation space, and simulation system is put into insulating box 19；Simulate the dosage of sand body 30, simulation wellbore hole
29 length and depth of setting and other conventional parameters are adjusted according to actual storage parameter.
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 19 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 23 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 24 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 31 in simulation wellbore hole 29 is extracted out；Will
Producing well attachment means 15 are connected respectively with simulation water injection well 21, simulated production well head 22 in production system, by back-pressure valve 16
Simulated storage pressure is modulated, control valve 2 is opened, implements simulation decompression exploitation, it is real to output object by gas-liquid separator 17
Gas-liquid separation is applied, recovered water is collected by water storage device 9, output gas is collected by gas intermediate receptacle 18,
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 25,
Operational parameter in simulation system in the recovery process of record decompression in real time of pressure tester 26.
Step 3：Seawater injection drive is implemented to simulation system by seawater injection system, by simulation water injection well 21 and seawater injection
Water injection well attachment means 14 are connected in system, open the control valve 2 being connected with supercharging device 3, and seawater enters in water storage device 9
Enter and filtered in filter 11, the seawater after filtering is heated into heater 12, and the seawater after heating, which enters, to be increased
It is pressurized in pressure device 3, water injection well attachment means 14 is entered by check-valves 13, seawater is injected into simulation water injection well 21, passed through
Fluid flowmeter 10, pressure sensor 5, temperature sensor 6 monitor injection parameter in real time.
Output object collection is implemented by the production system being connected with simulated production well head 22, back-pressure valve 16 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 17, by water storage device 9 to adopting
Water outlet is collected, and output gas is collected by gas intermediate receptacle 18, 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 25, pressure tester 26
Operational parameter in simulation system.
Above-mentioned steps carry out during, the monitoring system by temperature measuring equipment 25, pressure tester 26, 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 (7)
- A kind of 1. device for simulating parallel water horizontal well seawater injection exploitation of gas hydrate, it is characterised in that the experimental provision Including air supply system, liquid-supplying system, simulation system, seawater injection system, 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 seawater injection System is connected with simulation system, and the production system is connected with simulation system, the monitoring system respectively with the supply System, liquid-supplying system, simulation system, seawater injection system 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；It is the simulation system that the seawater injection system, which is used for, Seawater is injected, to simulate water injection well in actual production；The production system is used to produce caused day in the simulation system Right gas and water, and the output gas yield, aquatic products amount are analyzed, to simulate producing well in actual production；The simulation system is used In simulation gas hydrates pressure, temperature, saturation degree, permeability and conventional formation parameter, and simulate and be hydrated in natural gas Parallel water horizontal well hole pattern during thing is hidden；The monitoring system is used for air supply system described in real-time collecting, liquid-supplying system, simulation system System, seawater injection system, production system running parameter, data caused by writing task parameter, and controlled in fact by monitoring system Test operation.
- 2. a kind of device for simulating parallel water horizontal well seawater injection 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 parallel water horizontal well seawater injection 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 parallel water horizontal well seawater injection exploitation of gas hydrate as claimed in claim 1, its feature It is, the seawater injection system includes water storage device, filter, heater, control valve, supercharging device, fluid flow Meter, pressure sensor, temperature sensor, high pressure line, check-valves, water injection well attachment means；Water storage device outlet is connected to filter entrance by high pressure line, and filter outlet is connected to by high pressure line Heater, heater are connected to supercharging device by high pressure line, and water storage device, filter, heater, which play, to be deposited Storage, filtering, heating seawater effect, control valve play regulation sea water supply speed between heater and supercharging device Effect, supercharging device outlet are connected to water injection well attachment means, fluid flowmeter, pressure sensor, temperature by high pressure line Sensor, check-valves play monitoring seawater flow, pressure, the work of temperature between supercharging device and water injection well attachment means With, and preventing seawater from flowing back, water injection well attachment means are connected with the simulation system.
- 5. a kind of device for simulating parallel water horizontal well seawater injection exploitation of gas hydrate as claimed in claim 1, its feature Be, the production system include producing well attachment means, control valve, pressure sensor, temperature sensor, high pressure line, Back-pressure valve, gas-liquid separator, water storage device, gas intermediate receptacle；Back pressure valve inlet is connected with producing well attachment means by high pressure line, control valve, pressure sensor, temperature sensor Between producing well attachment means and back-pressure valve, play a part of monitoring output object pressure, temperature, back-pressure valve plays simulation ground Stressor layer acts on, and the back pressure valve outlet is connected with gas-liquid separator, and output object is implemented gas-liquid separation by gas-liquid separator, and Output water is fed into water storage device, output gas feeds gas intermediate receptacle；Producing well attachment means are connected with simulation system, mould Output object caused by the work of plan system enters production system by producing well attachment means.
- 6. a kind of device for simulating parallel water horizontal well seawater injection 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 with simulating water injection well phase in the seawater injection system Connect, producing well attachment means are connected with simulated production well head in the production system.
- 7. a kind of device for simulating parallel water horizontal well seawater injection 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, seawater injection 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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| CN201710992326.0A CN107503715A (en) | 2017-10-23 | 2017-10-23 | A kind of device for simulating parallel water horizontal well seawater injection exploitation of gas hydrate |
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Application publication date: 20171222 |