CN107575221A - A kind of device for simulating the exploitation of gas hydrates parallel water horizontal well seawater injection - Google Patents
A kind of device for simulating the exploitation of gas hydrates parallel water horizontal well seawater injection Download PDFInfo
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- CN107575221A CN107575221A CN201710991817.3A CN201710991817A CN107575221A CN 107575221 A CN107575221 A CN 107575221A CN 201710991817 A CN201710991817 A CN 201710991817A CN 107575221 A CN107575221 A CN 107575221A
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Abstract
The invention discloses a kind of device for simulating the exploitation of gas hydrates parallel water horizontal well seawater injection, it is related to gas hydrates development field.Device includes air supply system, liquid-supplying system, simulation system, frac 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, fracturing work is implemented to simulation gas hydrates storage by frac system, 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 the exploitation of gas hydrates parallel water horizontal well seawater injection, 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 natural gas hydration
The device of thing parallel water horizontal well seawater injection exploitation, to meet the requirement of current three-dimensional simulation experimental provision, and overcomes 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 the exploitation of gas hydrates parallel water horizontal well seawater injection, device includes supplying
Gas system, liquid-supplying system, simulation system, frac system, seawater injection system, production system and monitoring system, apparatus of the present invention
Using main body of the back-up sand case as simulation system, natural gas and water are supplied into simulation system by air supply system, liquid-supplying system
Gas hydrates are formed, fracturing work is implemented to simulation gas hydrates storage by frac system, passes through seawater injection system
System injection seawater is implemented to collect to simulate seawater injection exploitation, by production system to produced gas and water, by monitoring system to reality
Implementation Process complete monitoring is tested, experimental provision of the present invention implements mould using three dimensional constitution to seawater injection exploitation of gas hydrate
Intend, 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 pressure
Split system with simulation system to be connected, the seawater injection system is connected with simulation system, the production system and simulation system
Be connected, the monitoring system respectively with the air supply system, liquid-supplying system, simulation system, frac system, seawater injection system and
Production system is connected.
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 frac system is used for real to simulation system
Apply fracturing work；The seawater injection system is used to inject seawater for the simulation system, to simulate water injection well in actual production；
The production system is used to produce caused natural gas and water in the simulation system, and analyzes the output gas yield, aquatic products
Amount, to simulate producing well in actual production；The simulation system is used to simulate gas hydrates pressure, temperature, saturation
Degree, permeability and conventional formation parameter, and simulate the parallel water horizontal well hole pattern in gas hydrates；The monitoring system
Unite for air supply system, liquid-supplying system, simulation system, frac system, seawater injection system, production system work described in real-time collecting
Parameter, data caused by writing task parameter, and experimental implementation is controlled by monitoring system.
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, frac system of the invention includes water storage device, agitating device, control valve, supercharging device, liquid flow
Gauge, pressure sensor, temperature sensor, high pressure line, check-valves, water injection well attachment means；Water storage device outlet passes through height
Pressure pipeline is connected to agitating device entrance, for will feed agitating device with liquid water inside water storage device, and in agitating device
Mixing forms fracturing fluid with liquid water and additive, and agitating device outlet connects supercharging device entrance, regulating valve by high pressure line
For door between agitating device and supercharging device, supercharging device outlet is connected to water injection well attachment means, liquid by high pressure line
Flowmeter body, pressure sensor, temperature sensor, check-valves play prison between supercharging device and water injection well attachment means
The effect of flow quantity, pressure, temperature is split in pressure measurement, and prevents fracturing fluid from flowing back, water injection well attachment means and the simulation system phase
Connection.
In the frac 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 the experimental water for being applied to configuration fracturing fluid, the agitating device
For the conventional chambers experimental facilities with agitating function, the control valve is normal with signal transmission and remote control function
Control valve equipment is advised, the supercharging device can be constant speed pump group, constant current pump group, constant pressure pump group and other application in interior
The pump group of experiment, the fluid flowmeter, pressure sensor, temperature sensor are real for the conventional chambers with signal transfer functions
Equipment is tested, the check-valves is the conventional chambers experimental facilities with individual event circulating function, and the water injection well attachment means are tool
There is the conventional chambers experimental facilities of connection simulation water injection well and sealing function.
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, X ray occur
Device, X ray detector；Reaction vessel is the high pressure resistant clear sheet of cuboid, and the upper cover plate is located at the reaction vessel top,
The cuboid confined space formed by bolt hole with bolt seal, simulation water injection well, simulated production well head, temperature measuring equipment connect
Mouth, pressure tester interface are respectively positioned on upper cover plate surface, and the air supply inlet, feed flow entrance are located at reaction vessel surface, simulate sand
Body is located at reaction vessel interior, and for simulation wellbore hole inside simulation sand body, the temperature measuring equipment and the pressure tester are located at mould
Intend inside sand body, X-ray emitter, X ray detector be located at reaction vessel both sides, 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, X-ray emitter, X ray detector 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 frac system
It is connected, water injection well attachment means are connected with simulation water injection well in the seawater injection system, are produced in the production system
Well attachment means are connected with simulated production well head.
The X-ray emitter, X ray detector are connected with monitoring system Computer, send and receive X ray letter
Number, it is different from transmitance using absorption of the different densities material to X ray, can be with after being handled by computer data
The three-dimensional image of simulation system internal simulation sand body is obtained, can gas hydrates be stored with length, the width of fracturing fracture
Degree, direction and other fracturing parameters are intuitively observed.
Preferably, monitoring system of the invention includes computer and transmission cable, the air supply system, liquid-supplying system, mould
Plan system, frac system, seawater injection system, production system are connected by transmission cable with computer, in experimentation
In in real time collecting temperature, pressure, output logistics capacity, x-ray imaging and other experimental datas, and pass through monitoring system control experiment
Operation.
A kind of device beneficial effect of simulation gas hydrates parallel water horizontal well seawater injection exploitation 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.
7), can be effectively to simulating gas water based on frac system and X-ray emitter, the application of X ray detector
Compound storage implements fracturing work, and by X-ray emitter, X ray detector to the length of fracturing fracture, direction and exploitation
During crack change three-dimensional synchronously visualization display.
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 frac system detailed construction schematic diagram.
Fig. 6 is production system detailed construction schematic diagram.
Fig. 7 is simulation system detailed construction schematic diagram.
Fig. 8 is simulation system side view.
Fig. 9 is that upper cover plate arranges schematic diagram.
Figure 10 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
6th, temperature sensor 7, high pressure line 8, tap valve 9, water storage device 10, fluid flowmeter 11, filter 12, plus
Thermal 13, check-valves 14, water injection well attachment means 15, agitating device 16, producing well attachment means 17, back-pressure valve
18th, gas-liquid separator 19, gas intermediate receptacle 20, insulating box 21, reaction vessel 22, simulation water injection well 23, simulation life
Produce well head 24, air supply inlet 25, feed flow entrance 26, temperature measuring equipment 27, pressure tester 28, bolt hole 29, upper cover plate
30th, simulation wellbore hole 31, simulation sand body 32, X-ray emitter 33, X ray detector 34, drawing out type filler 35, close
Seal original paper 36, simulation straight well section 37, dummy level section 38, analogue perforation 39, 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 the exploitation of gas hydrates parallel water horizontal well seawater injection of the present invention
Structure schematic diagram, including air supply system, liquid-supplying system, simulation system, frac 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 pressure break system
System is connected with simulation system, and the seawater injection system is connected with simulation system, and the production system is connected with simulation system
Connect, the monitoring system respectively with the air supply system, liquid-supplying system, simulation system, frac system, seawater injection system and production
System is connected.
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 frac system is used for real to simulation system
Apply fracturing work；The seawater injection system is used to inject seawater for the simulation system, to simulate water injection well in actual production；
The production system is used to produce caused natural gas and water in the simulation system, and analyzes the output gas yield, aquatic products
Amount, to simulate producing well in actual production；The simulation system is used to simulate gas hydrates pressure, temperature, saturation
Degree, permeability and conventional formation parameter, and simulate the parallel water horizontal well hole pattern in gas hydrates；The monitoring system
Unite for air supply system, liquid-supplying system, simulation system, frac system, seawater injection system, production system work described in real-time collecting
Parameter, data caused by writing task parameter, and experimental implementation is controlled by monitoring system.
The device that a kind of above-mentioned simulation gas hydrates parallel water horizontal well seawater injection is exploited is carried out below 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, 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, frac system includes water storage device 9, agitating device 15, control valve 2, supercharging
Device 3, fluid flowmeter 10, pressure sensor 5, temperature sensor 6, high pressure line 7, check-valves 13, water injection well attachment means
14。
The outlet of water storage device 9 is connected to the entrance of agitating device 15 by high pressure line 7, for the inside of water storage device 9 to be matched somebody with somebody
Liquid water feeds agitating device 15, and mixing forms fracturing fluid with liquid water and additive in agitating device 15, and agitating device 15 goes out
Mouth connects the entrance of supercharging device 3 by high pressure line 7, and control valve 2 is between agitating device 15 and supercharging device 3, supercharging
The outlet of device 3 is connected to water injection well attachment means 14 by high pressure line 7, and fluid flowmeter 10, pressure sensor 5, temperature pass
Sensor 6, check-valves 13 play monitoring pressure break flow quantity, pressure, temperature between supercharging device 3 and water injection well attachment means 14
The effect of degree, and prevent fracturing fluid from flowing back, water injection well attachment means 14 are connected with the simulation system.
As shown in fig. 6, in the present embodiment, production system includes producing well attachment means 16, control valve 2, pressure sensing
Device 5, temperature sensor 6, high pressure line 7, back-pressure valve 17, gas-liquid separator 18, water storage device 9, gas intermediate receptacle 19.
The entrance of back-pressure valve 17 is connected with producing well attachment means 16 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 16 and back-pressure valve 17
With back-pressure valve 17 plays the effect of simulated formation pressure, and the outlet of back-pressure valve 17 is connected with gas-liquid separator 18, gas-liquid separation
Output object is implemented gas-liquid separation by device 18, and output water is fed into water storage device 9, and output gas feeds gas intermediate receptacle 19, raw
Production well attachment means 16 are connected with simulation system, and output object caused by simulation system work is entered by producing well attachment means 16
Enter production system.
As shown in Fig. 7,8,9, in the present embodiment, simulation system includes insulating box 20, reaction vessel 21, simulation water injection well
22nd, simulated production well head 23, air supply inlet 24, feed flow entrance 25, temperature measuring equipment 26, pressure tester 27, bolt hole 28, upper cover plate
29th, simulation wellbore hole 30, simulation sand body 31, X-ray emitter 32, X ray detector 33.
Reaction vessel 21 is the high pressure resistant clear sheet of cuboid, and upper cover plate 29 is located at the top of reaction vessel 21, by bolt hole
The 28 cuboid confined spaces formed with bolt seal, simulation water injection well 22, simulated production well head 23, temperature measuring equipment 26, survey
Pressure device 27 is respectively positioned on the surface of upper cover plate 29, and the air supply inlet 24, feed flow entrance 25 are located at the surface of reaction vessel 21, simulate sand
Body 31 is located inside reaction vessel 21, and simulation wellbore hole 30 is inside simulation sand body 31, the temperature measuring equipment 26 and the pressure measurement
Device 27 positioned at simulation sand body 31 inside, the reaction vessel 21, simulation water injection well 22, simulated production well head 23, supply into
Mouth 24, feed flow entrance 25, temperature measuring equipment 26, pressure tester 27, bolt hole 28, upper cover plate 29, simulation wellbore hole 30, simulation sand body
31st, X-ray emitter 32, X ray detector 33 are respectively positioned in insulating box 20.
As shown in figure 8, it is simulation system side view, in the surface air supply inlet 24 of reaction vessel 21, feed flow entrance 25 in mistake
Position alignment branch, X-ray emitter 32, X ray detector 33 are located at the both sides of reaction vessel 21, as shown in figure 9, being upper cover plate cloth
Schematic diagram is put, simulation water injection well 22, simulated production well head 23, temperature measuring equipment 26, the branch of pressure tester 27 are in the table of upper cover plate 29
Face, X-ray emitter 32, X ray detector 33 are located at the both sides of reaction vessel 21.
As shown in Figure 10, be simulation wellbore hole structural representation, simulation wellbore hole 30 include stainless steel tube 39, sealing original paper 35 and
Drawing out type filler 34, simulation wellbore hole 30 is fixed on the surface of upper cover plate 29 by sealing original paper 35, stainless steel tube 39 includes
Straight well section 36, dummy level section 37 and analogue perforation 38 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, frac system, seawater injection system, production system and pass through transmission cable and computer
It is connected, to real-time collecting temperature, pressure, output logistics capacity, x-ray imaging and other experimental datas in experimentation,
And experimental implementation is controlled by monitoring system.
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 21
Body 31 paves compacting, two simulation wellbore holes 30 of tripping in during sand body 31 is simulated in filling, simulation water injection well 22, simulation is given birth to
Production well head 23 is connected with upper cover plate 29, sealed, inside temperature measuring equipment 26 and the tripping in of pressure tester 27 simulation sand body 31, by thermometric
Device 26 and pressure tester 27 are connected with upper cover plate 29, sealed, by bolt hole 28 and bolt by reaction vessel 21 and upper cover plate
29, which carry out bolt seal, forms simulated formation space, and simulation system is put into insulating box 20；Simulate the dosage of sand body 31, simulation wellbore hole
30 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 20 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 24 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 25 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 34 in simulation wellbore hole 30 is extracted out；Will
Producing well attachment means 16 are connected respectively with simulation water injection well 22, simulated production well head 23 in production system, by back-pressure valve 17
Simulated storage pressure is modulated, control valve 2 is opened, implements simulation decompression exploitation, it is real to output object by gas-liquid separator 18
Gas-liquid separation is applied, recovered water is collected by water storage device 9, output gas is collected by gas intermediate receptacle 19,
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 26,
Operational parameter in simulation system in the recovery process of record decompression in real time of pressure tester 27.
Step 3：Fracturing work is implemented to simulation system by frac system, by simulation water injection well 22 and frac system
Middle water injection well attachment means 14 are connected, and the inside of water storage device 9 is fed into agitating device 15 with liquid water, and in agitating device 15
Mixing forms fracturing fluid with liquid water and additive, opens control valve 2, and fracturing fluid in agitating device 15 is fed into supercharging device 3,
And fracturing fluid is injected into simulation water injection well via supercharging device 3, high pressure line 7, check-valves 13, water injection well attachment means 14
22, fracturing work is implemented to simulation system, monitoring is noted in real time by fluid flowmeter 10, pressure sensor 5, temperature sensor 6
Enter parameter, feed after fracturing fluid reaches scheduled volume and close supercharging device 3, control valve 2；Occurred during fracturing work by X ray
Device 32, X ray detector 33 monitor fracturing fracture delta data in real time, and are stored by monitoring system.
Step 4：Seawater injection drive is implemented to simulation system by seawater injection system, by simulation water injection well 22 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, enter water injection well attachment means 14 by check-valves 13 injects simulation water injection well 22 by seawater, passes through liquid
Flowmeter body 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 23, back-pressure valve 17 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 18, by water storage device 9 to adopting
Water outlet is collected, and output gas is collected by gas intermediate receptacle 19, 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 26, pressure tester 27
Operational parameter in simulation system.
Above-mentioned steps carry out during, the monitoring system by temperature measuring equipment 26, pressure tester 27, 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 the exploitation of gas hydrates parallel water horizontal well seawater injection, it is characterised in that the experimental provision Including air supply system, liquid-supplying system, simulation system, frac 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 pressure break system System is connected with simulation system, and the seawater injection system is connected with simulation system, and the production system is connected with simulation system Connect, the monitoring system respectively with the air supply system, liquid-supplying system, simulation system, frac system, seawater injection system and production System is connected；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 frac system is used to simulation system is implemented to press Split operation；The seawater injection system is used to inject seawater for the simulation system, to simulate water injection well in actual production；It is described Production system is used to produce caused natural gas and water in the simulation system, and analyzes the output gas yield, aquatic products amount, uses To simulate producing well in actual production；The simulation system is used to simulate gas hydrates pressure, temperature, saturation degree, oozed Saturating rate and conventional formation parameter, and simulate the parallel water horizontal well hole pattern in gas hydrates；The monitoring system is used In air supply system, liquid-supplying system, simulation system, frac system, seawater injection system, production system work ginseng described in real-time collecting Number, data caused by writing task parameter, and experimental implementation is controlled by monitoring system.
- 2. a kind of device for simulating the exploitation of gas hydrates parallel water horizontal well seawater injection 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 the exploitation of gas hydrates parallel water horizontal well seawater injection 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 the exploitation of gas hydrates parallel water horizontal well seawater injection as claimed in claim 1, its feature It is, the frac system includes water storage device, agitating device, control valve, supercharging device, fluid flowmeter, pressure sensing Device, temperature sensor, high pressure line, check-valves, water injection well attachment means；Water storage device outlet is connected to agitating device entrance by high pressure line, is stirred for will be fed inside water storage device with liquid water Device is mixed, and mixing forms fracturing fluid with liquid water and additive in agitating device, agitating device outlet is connected by high pressure line Supercharging device entrance is connect, between agitating device and supercharging device, supercharging device outlet is connected control valve by high pressure line Water injection well attachment means are connected to, fluid flowmeter, pressure sensor, temperature sensor, check-valves are located at supercharging device and water filling Between well attachment means, play a part of monitoring pressure break flow quantity, pressure, temperature, and prevent fracturing fluid from flowing back, water injection well connection Device is connected with the simulation system.
- 5. a kind of device for simulating the exploitation of gas hydrates parallel water horizontal well seawater injection 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.
- 6. a kind of device for simulating the exploitation of gas hydrates parallel water horizontal well seawater injection 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.
- 7. a kind of device for simulating the exploitation of gas hydrates parallel water horizontal well seawater injection 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, X-ray emitter, X ray detection Device；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 X-ray emitter, X ray detector are located at reaction vessel both sides, the reaction vessel, simulation water injection well, simulation Production wellhead, air supply inlet, feed flow entrance, temperature measuring equipment, pressure tester, bolt hole, upper cover plate, simulation wellbore hole, simulation sand body, X-ray emitter, X ray detector are 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 frac system Connect, water injection well attachment means are connected with simulation water injection well in the seawater injection system, and producing well connects in the production system Connection device is connected with simulated production well head.
- 8. a kind of device for simulating the exploitation of gas hydrates parallel water horizontal well seawater injection 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, pressure break system System, seawater injection system, production system are connected by transmission cable with computer, to collection is warm in real time in experimentation Degree, pressure, output logistics capacity, x-ray imaging and other experimental datas, and experimental implementation is controlled by monitoring system.
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