CN107542441A - A kind of method of parallel water horizontal well hot-water flooding exploitation of gas hydrate - Google Patents
A kind of method of parallel water horizontal well hot-water flooding exploitation of gas hydrate Download PDFInfo
- Publication number
- CN107542441A CN107542441A CN201710987944.6A CN201710987944A CN107542441A CN 107542441 A CN107542441 A CN 107542441A CN 201710987944 A CN201710987944 A CN 201710987944A CN 107542441 A CN107542441 A CN 107542441A
- Authority
- CN
- China
- Prior art keywords
- water
- well
- gas
- exploitation
- horizontal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Abstract
A kind of method of parallel water horizontal well hot-water flooding exploitation of gas hydrate, belong to the production technique field of gas hydrates.Methods described includes：With reference to geologic information, arrangement parallel, horizontal well pattern and supporting completion practice are stored to target, decompression exploitation is implemented until without economic benefit by horizontal well after completion, then ground supply system and underground movable electric heating system are arranged in water injection well, injection hot water is stored to gas hydrates by water injection well, and natural gas and recovered water are collected from producing well；The present invention can employ gas hydrates reserves by arranging that the horizontal well of parallel distribution improves to target storage, portable heating storage is realized using packaged type electric heating system, by the speed for changing heating location, heat power output and water pumping gas production, realize that gas hydrates storage optimizes exploitation, gas production efficiency can be improved, increases economic benefit.
Description
Technical field
A kind of method of parallel water horizontal well hot-water flooding exploitation of gas hydrate, belong to the production technique of gas hydrates
Field, and in particular to a kind of to comprehensively utilize heating and the method for voltage drop method exploitation of gas hydrate.
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.
CN 200910059321.8 disclose it is a kind of by water pump to outside exploitation of gas hydrates well the device of draining and
Method, the pressure of gas hydrates layer is reduced by draining, promote the decomposition of gas hydrates layer.It is but simple using drop
The decomposition motive force that platen press provides is small, and gas hydrate dissociation causes temperature to reduce, when temperature is reduced to less than 0 DEG C, and also
Ice can be caused to block the stagnation with gas hydrate dissociation, while CN 20111048906.4 discloses a kind of drainage and step-down
The method exploitation of gas hydrate of heating, the continuous decomposition for promoting hydrate, above two method are all to utilize hydrate point
Escaped after solution on gas, water is because deadweight is fallen, and water pump discharges water outside exploitation of gas hydrates well, but actually decomposition gas
Substantial amounts of steam is carried during upper ease, upward velocity is very slow, and production efficiency is very low.And level is utilized in CN 20111048906.4
Well combustion heating, combustion heating is dangerous in exploitation of gas hydrates well, has inside and outside exploitation of gas hydrates well flammable
Gas, directly heated using naked light abnormally dangerous.Tapped natural gas in CN 201310398998.0 using microwave generator heating
Hydrate, promote gas hydrate dissociation by heating, but exploited using straight well mode and limit heated gas water
The heated volume of compound, and by microwave generator be fixed on packer top more further limit gas hydrates by
Hot volume.
The content of the invention
The present invention relates to a kind of method of parallel water horizontal well hot-water flooding exploitation of gas hydrate, methods described includes：Knot
Geologic information is closed, arrangement parallel, horizontal well pattern and supporting completion practice are stored to target, implements to be depressured by horizontal well after completion
Exploitation is then arranged ground supply system and underground movable electric heating system in water injection well, passed through until without economic benefit
Water injection well stores injection hot water to gas hydrates, and natural gas and recovered water are collected from producing well；The present invention is logical
Cross to target storage and arrange that the horizontal well raising of parallel distribution can employ gas hydrates reserves, use underground movable electricity
Heating system realizes packaged type heating storage, can by changing the speed of heating location, heat power output and water pumping gas production
Realize that gas hydrates storage optimizes exploitation, gas production efficiency can be improved, increase economic benefit.
To achieve these goals, the invention provides a kind of side of parallel water horizontal well hot-water flooding exploitation of gas hydrate
Method, methods described comprise the steps：
Step 1, arrangement horizontal-well network, with reference to geologic information, target is stored and arranges parallel, horizontal well pattern, two mouthfuls in well pattern
Horizontal well is one group, passes through parallel level distribution well as producing well as water injection well, lower curtate position well positioned at storage high-order bit well
Gas hydrates reserves can be employed to improve；
Step 2, completion practice, parallel, horizontal well pattern arrangement carry out supporting completion practice after completing；
Step 3, decompression exploitation, after supporting completion practice, the supporting ground system of located production wells, to water injection well and producing well
Implement decompression exploitation, until without economic benefit；
Step 4, arrangement heating system, heating system include ground supply system and underground movable electric heating system；
Step 5, heating exploitation, injection hot water is stored to gas hydrates by water injection well, and day is collected from producing well
Right gas and stratum water.
Parallel, horizontal well pattern includes in the step 1：The water injection well horizontal segment bearing of trend is horizontal with the producing well
Section bearing of trend can be in the same direction or reverse.
The parallel, horizontal well pattern arranges that scope is：The difference scope 5-50 of water injection well horizontal segment and producing well horizontal segment depth
Rice, horizontal section length scope 500-2000 rice, corresponding well spacing parameter is selected according to formation condition in actual production.
Supporting completion practice is divided into straight well section completion and horizontal segment completion in the step 2, straight in the straight well section completion
Well section depth is more than horizontal segment depth 5-30 rice, forms liquid storage chamber, to realize that air water point is adopted, reduces produced gas water content, and press down
Gas hydrates are formed in sleeve pipe processed；The horizontal segment completion is well-case perforating completion, perforation fragment position, perforating depth, is penetrated
Hole density can be adjusted according to actual storage situation；Tripping in electricity is latent in the water injection well and producing well straight well section during operation
Pump, tripping in is to straight well section bottom liquid storage chamber, and tripping in sand control installation, sand control installation can prevent gas hydrate dissociation from producing
Sandstone enter straight well section in, prevent sandstone damage underground equipment；Specific implementation process is the tripping in sand control into horizontal well successively
Device, centralizer, electric submersible pump and power cable, the sand control installation, centralizer, electric submersible pump and power cable are conventional
Downhole tool, model can be adapted to according to actual storage situation selection.
The supporting ground system of producing well includes electric power system, produced water treatment system, produced gas processing system in the step 3
System and control system.
The electric power system includes power supply, frequency converter, is sequentially connected, passed through by power cable and production wellhead oil pipe entrance
Power converter output is adjusted, and then adjusts electric submersible pump in shaft bottom drain age velocity；The power supply include generator, commercial power and
Various normal power supplies.
The produced water treatment system includes water storage device, water treatment facilities, control valve, temperature sensor, pressure and passed
Sensor, fluid flowmeter, it is sequentially connected via liquid line and the outlet of production wellhead oil pipe, is passed by fluid flowmeter, pressure
Sensor and temperature sensor real-time collecting electric submersible pump discharge opeing data, displacement is implemented to control by control valve, at water
Reason device is filtered to recovered water, degassing process, the water after filtering is fed into water storage device to treat to handle in next step, the storage
Metering device is provided with inside water installations, to monitor water-holding quantity inside water storage device；The water storage device include water pot and its
He has the container for depositing water storage function, and the metering device, which includes tank gage and other, has the device for measuring water level function,
The water treatment facilities is included with the conventional water treatment equipment that airway dysfunction is dissolved in filtering, decomposition water, the control valve, temperature
It is conventional equipment to spend sensor, pressure sensor, fluid flowmeter, liquid line.
The extraction gas processing system includes warehousing and transportation facilities, gas treatment equipment, gas-liquid separator, control valve, temperature
Sensor, pressure sensor, gas flowmeter are spent, production wellhead cannula exit is connected to via gas transmission line successively, passes through gas
Flowmeter body, pressure sensor and temperature sensor real-time collecting sleeve pipe gas production data, gas production is implemented by control valve
Control, gas-liquid separation processing is carried out to produced gas by gas-liquid separator, the natural gas after separation feeds natural gas treatment plant
Next step processing, including filtration treatment, desulfurization process, dewater treatment are carried out, the natural gas after processing feeds warehousing and transportation facilities and carried out
Transport；The warehousing and transportation facilities include gas transmission line, pressure vessel and other there is the conventional equipment of natural gas accumulating function, it is described
Gas treatment equipment includes
The conventional equipment with gas-liquid separating function, the control valve, temperature sensor, pressure sensor, gas flowmeter, gas transmission
Pipeline is conventional equipment.
It is connected between the water treatment facilities and gas-liquid separator by gas transmission line with liquid line, the appendix
Line is provided with gas flowmeter, and the liquid line is provided with fluid flowmeter, caused natural after being deaerated in water treatment facilities
Gas feeds gas-liquid separator, and the water that gas-liquid separator separates go out feeds water treatment facilities and is further processed.
The control system includes controller and signal receiver, passes through frequency converter in signal-transmitting cable and electric power system
It is connected, to monitoring frequency converter working condition in real time, and remote control is implemented to frequency converter by controller, passed by signal
Transmission cable connects with control valve, temperature sensor, pressure sensor, fluid flowmeter, metering device in produced water treatment system
Connect, monitoring produced water treatment working state of system is implemented by controller, and realize and produced water treatment system remote is controlled, lead to
Signal-transmitting cable is crossed with control valve, temperature sensor, pressure sensor, gas flowmeter in extraction gas processing system to connect
Connect, monitoring extraction gas processing system working condition is implemented by controller, and realize to producing gas processing system remote control；Institute
State controller include computer, tablet personal computer and other there is the conventional equipment of control function, the signal receiver is tool
There is signal to receive, the conventional equipment of transformation function.
The decompression exploitation is embodied as, and shaft bottom is drawn water by electric submersible pump in water injection well and producing well, passes through oil pipe
With the gas production of casing annulus part, underground electric submersible pump discharge capacity is implemented to adjust by frequency converter, when gas production is too low or other
After reason causes no economic benefit, water injection well Ground device is removed one by one, and arrange heating system.
Ground supply system described in the step 4 includes electric power system, water system and control system.
The electric power system includes power supply, frequency converter, is sequentially connected, passed through by power cable and applications of coiled tubing unit entrance
Power converter output is adjusted, and then adjusts electric heater in shaft bottom heating power；The power supply includes generator, commercial power
And various normal power supplies.
The water system includes water treatment facilities, water storage device, metering device, supercharging device, fluid flowmeter, temperature
Sensor, pressure sensor, applications of coiled tubing unit, the water treatment facilities, water storage device, supercharging device, fluid flowmeter, temperature
Degree sensor, pressure sensor are sequentially connected via liquid line and applications of coiled tubing unit；The water treatment facilities connects water source,
Injection water is filtered, degassing process, the water after filtering is fed into water storage device, metering dress is provided with inside the water storage device
Put, to monitor water-holding quantity inside water storage device, the supercharging device provides operating pressure, the fluid flow for injection water
Meter, pressure sensor and temperature sensor record water system operational data in real time, and the applications of coiled tubing unit entrance connects respectively
Enter liquid line and power cable, and water and work electricity consumption will be injected by coiled tubing and are delivered to underground；The water source includes
Well water, seawater, stratum recovered water and other conventional source waters, the water treatment facilities are included with solution gas in filtering, decomposition water
The conventional water treatment equipment of function, the water storage device, which includes water pot and other, has the container for depositing water storage function, the meter
Measure device include tank gage and other have measurement water level function devices, the supercharging device include water pump, pump truck and its
He has the conventional supercharging device of function of increasing pressure, and the temperature sensor, pressure sensor, fluid flowmeter, liquid line are equal
For conventional equipment, the applications of coiled tubing unit includes Operation Tubing Aggregate or the equipment of other conventional control coiled tubings.
The control system includes controller and signal receiver, passes through frequency converter in signal-transmitting cable and electric power system
It is connected, to monitoring frequency converter working condition in real time, and remote control is implemented to frequency converter by controller, passed by signal
Transmission cable is connected with temperature sensor, pressure sensor, fluid flowmeter, supercharging device, metering device in water system, is passed through
Controller implements monitoring water system working condition, and realizes to water system remote control；The controller include computer,
Tablet personal computer and other there is the conventional equipment of control function, the signal receiver be received with signal, transformation function
Conventional equipment.
Underground movable electric heating system in the step 4, including electric heater, centralizer, packer and continuous oil
Pipe, at water injection well bottom, successively by electric heater, centralizer, packer by coiled tubing tripping in water injection well, electric heater reaches
Packer is sealed after horizontal segment predeterminated position, to form closed water filling space, the packer, centralizer can be one,
Can also be multiple, power cable and liquid line are located inside coiled tubing；The packer, centralizer is can be with continuous oil
Matching used conventional equipment is managed, the electric heater is that may connect to coiled tubing and have under the conventional well of electric heating function
Electric heater, electrical heating power can be implemented to adjust according to actual storage condition；It can be horizontal well in segments that the packer, which does envelope,
Fracturing packer does encapsulation method or other conventional horizontal well coiled tubings do encapsulation method.
Heating exploitation specific implementation process is in the step 5, is added by ground supply system to underground movable electricity
Hot systems provide injection water and work electricity consumption, generate and hot water and inject in storage in underground, by producing well collect natural gas and
Stratum water, injected water volume is adjusted by supercharging device, and power output of the power supply to electric heater, electrical heating are adjusted by frequency converter
Device is moveable in horizontal segment, by adjusting the length of coiled tubing G.I.H, can adjust electric heater in water filling well water
The position of flat section, to realize the adjustable heating of diverse location, different capacity, and natural gas is implemented to exploit from producing well.
In horizontal production well gas production process, by controlling water injection well injection rate and producing well to produce gas and water discharge capacity, and then adjust
Whole producing well hydrodynamic face and flowing bottomhole pressure (FBHP), between making producing well flowing bottomhole pressure (FBHP) holding 1.5-4Mpa, pass through and adjust rational row
Speed is adopted, control produced gas water content, temperature, to suppress to be formed gas hydrates in pit shaft, and keeps higher gas production speed
Degree.
Beneficial effect of the present invention is：
1) present invention is exploited by voltage drop method to water injection well and producing well first, to ensure to exploit in follow-up hot-water flooding
Shi Buhui because hydrate largely decomposes and occur bottom pressure is too high, the too fast danger to caused by underground equipment of natural gas flow velocity
Evil, improve the security of exploitation of gas hydrates.
2) present invention production bottom is provided with liquid storage chamber, and the water generated in hot-water flooding recovery process can enter liquid storage chamber
And discharged via electric submersible pump, make output gas avoid mixing with water in underground, can effectively reduce the aqueous of natural gas in oil jacket annular space
Amount, increase gas upward velocity, and then improve production efficiency.
3) heated, can entered according to actual developmental state is stored using fixed point relative to conventional heating methods, the inventive method
Row segmenting perforating, subsection water injection, reduce influence of the storage anisotropism to hot-water flooding.
4) the inventive method is heated using underground, and thermal loss is small, and energy utilization rate is high, and heating location, time, power are equal
It is adjustable and safe and reliable.
5) present invention greatly limit increase can employ gas hydrates reserves by parallel water horizontal well mode well spacing,
Heated by high-order bit, and packer be provided with water injection well, force the natural gas being decomposed out and water to enter lower curtate position producing well,
The natural gas and water for carrying heat persistently keep heat transfer in downflow processes, can increase heat utilization ratio, further improve
Economic benefit.
Brief description of the drawings
In order to illustrate more clearly of technical scheme, the required accompanying drawing used in description will be made below simple
Ground introduction, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for those skilled in the art
For, it can also obtain other accompanying drawings according to these accompanying drawings on the premise of not paying creative work.
Fig. 1 is parallel, horizontal well pattern distribution schematic diagram in the same direction.
Fig. 2 is the reverse distribution schematic diagram of parallel, horizontal well pattern.
Fig. 3 is decompression exploitation completion schematic diagram.
Fig. 4 is producing well ground configuration schematic diagram.
Fig. 5 is water injection well ground feed system schematic diagram.
Fig. 6 is underground movable electric heating system schematic diagram.
Drawing reference numeral：1st, water injection well 2, producing well 3, gas hydrates reservoir 4, overlying rock 5, lower rock stratum 6, straight well
Section 7, horizontal segment 8, sleeve pipe 9, oil pipe 10, perforated interval 11, sand control installation 12, electric submersible pump 13, centralizer 14, liquid storage chamber 15, power supply
16th, power cable 17, frequency converter 18, production wellhead 19, fluid flowmeter 20, pressure sensor 21, temperature sensor 22, liquid
Pipeline 23, control valve 24, water treatment facilities 25, water storage device 26, metering device 27, gas transmission line 28, gas flowmeter 29,
Gas-liquid separator 30, gas treatment equipment 31, warehousing and transportation facilities 32, controller 33, signal receiving device 34, signal-transmitting cable
35th, supercharging device 36, applications of coiled tubing unit 37, water injection well 38, coiled tubing 39, packer 40, electric heater.
Embodiment
The embodiment of the present invention provides a kind of method of parallel water horizontal well hot-water flooding exploitation of gas hydrate, methods described bag
Include：With reference to geologic information, arrangement parallel, horizontal well pattern and supporting completion practice are stored to target, is implemented after completion by horizontal well
Decompression exploitation is arranged ground supply system and underground movable electric heating system in water injection well, used until without economic benefit
Underground movable electric heating system realizes portable heating storage, by changing heating location, heat power output and draining
The speed of gas production, realize that gas hydrates storage optimizes exploitation, gas production efficiency can be improved, increase economic benefit.
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.
The embodiments of the invention provide a kind of method of parallel water horizontal well hot-water flooding exploitation of gas hydrate, methods described
Comprise the following steps：
Step 1, arrangement horizontal-well network, with reference to geologic information, target is stored and arranges parallel, horizontal well pattern, two mouthfuls in well pattern
Horizontal well is one group, passes through parallel level distribution well as producing well as water injection well, lower curtate position well positioned at storage high-order bit well
Gas hydrates reserves can be employed to improve, parallel, horizontal well pattern there are following two arrangement modes：
Parallel, horizontal well pattern as shown in Figure 1 distribution schematic diagram in the same direction, water injection well 1 are distributed in the same direction with producing well 2, water injection well 1
Horizontal segment depth of setting is less than the horizontal segment depth of setting of producing well 2, and water injection well 1 and the horizontal segment of producing well 2 are hydrated in natural gas
In thing reservoir 3, under overlying rock 4, on lower rock stratum 5.
The reverse distribution schematic diagram of parallel, horizontal well pattern as shown in Figure 2, water injection well 1 are reversely distributed with producing well 2, water injection well 1
Horizontal segment depth of setting is less than the horizontal segment depth of setting of producing well 2, and water injection well 1 and the horizontal segment of producing well 2 are hydrated in natural gas
In thing reservoir 3, under overlying rock 4, on lower rock stratum 5.
Step 2, completion practice, parallel, horizontal well pattern arrangement carry out supporting completion practice after completing, and decompression as shown in Figure 3 is opened
Completion schematic diagram is adopted, the straight well section 6 pierces depth and pierces depth more than horizontal segment 7, forms liquid storage chamber 14；The horizontal segment 7
Completion is well-case perforating completion, and perforated interval 10 is located on horizontal segment 7；Tripping in electricity is latent in water injection well 1 and the straight well section 6 of producing well 2
Pump 12, tripping in the bottom liquid storage chamber 14 of straight well section 6, and tripping in sand control installation 11, are drawn water to shaft bottom by oil pipe 9, pass through oil pipe 9
With the annular section gas production of sleeve pipe 8；Specific implementation process is tripping in sand control installation 11, centralizer 13, electricity are latent into horizontal well successively
Pump 12 and power cable, do not regard in power cable figure.
Step 3, decompression exploitation, after supporting completion practice, the supporting ground system of located production wells, to water injection well and producing well
Implement decompression exploitation, until without economic benefit, producing well ground configuration schematic diagram as shown in Figure 4, the supporting ground of producing well
System includes electric power system, produced water treatment system, extraction gas processing system and control system.
The electric power system includes power supply 15, frequency converter 17, by power cable 16 and the entrance of 18 oil pipe of production wellhead 9 successively
Connection, by adjusting the power output of frequency converter 17, and then electric submersible pump 12 is adjusted in shaft bottom drain age velocity.
The produced water treatment system includes water storage device 25, water treatment facilities 24, control valve 23, temperature sensor
21st, pressure sensor 20, fluid flowmeter 19, it is connected by liquid line 22 with the outlet of the oil pipe 9 of production wellhead 18, passes through liquid
Flowmeter body 19, pressure sensor 20 and the discharge opeing data of 21 real-time collecting electric submersible pump of temperature sensor 12, pass through control valve 23
Displacement is implemented to control, recovered water filtered by water treatment facilities 24, degassing process, the water after filtering is fed into storage
Water installations 25 are to treat to handle in next step, and the inside of water storage device 25 is provided with metering device 26, to monitor in water storage device 25
Portion's water-holding quantity.
The extraction gas processing system includes warehousing and transportation facilities 31, gas treatment equipment 30, gas-liquid separator 29, regulating valve
Door 23, temperature sensor 21, pressure sensor 20, gas flowmeter 28, are connected to production wellhead via gas transmission line 27 successively
18 sleeve pipes 8 export, by gas flowmeter 28, pressure sensor 20 and the gas production data of 21 real-time collecting sleeve pipe of temperature sensor 8,
Gas production is implemented to control by control valve 23, gas-liquid separation processing, separation are carried out to produced gas by gas-liquid separator 29
Natural gas afterwards feeds natural gas treatment plant 30 and carries out next step processing, including filtration treatment, desulfurization process, dewater treatment,
Natural gas after processing feeds warehousing and transportation facilities 31 and transported, the gas-liquid separator 29, gas treatment equipment 30 and accumulating
Equipment 31 is connected by gas transmission line 27, and gas flowmeter 28 is provided with pipeline.
It is connected between the water treatment facilities 24 and gas-liquid separator 29 by gas transmission line 27 with liquid line 22, institute
State gas transmission line 27 and be provided with gas flowmeter 28, the liquid line 22 is provided with fluid flowmeter 19, water treatment facilities 24
Caused natural gas feeds gas-liquid separator 29 after middle degassing, and the water that gas-liquid separator 29 is isolated feeds water treatment facilities 24 and entered
Row is handled in next step.
The control system includes controller 32 and signal receiver 33, by signal-transmitting cable 34 and electric power system
Frequency converter 17 is connected, to the monitoring working condition of frequency converter 17, and being implemented remotely to frequency converter 17 by controller 32 in real time
Control, pass through control valve 23, temperature sensor 21, pressure sensor in signal-transmitting cable 34 and produced water treatment system
20th, fluid flowmeter 19, metering device 26 connect, and implement monitoring produced water treatment working state of system by controller 32, and
Realize to produced water treatment system remote control, by signal-transmitting cable 34 with extraction gas processing system in control valve 23,
Temperature sensor 21, pressure sensor 20, gas flowmeter 28 connect, and implement monitoring extraction gas processing system by controller 32
Working condition, and realize to producing gas processing system remote control.
Step 4, arrangement heating system, heating system include ground supply system and underground movable electric heating system；
After decompression exploitation, water injection well Ground device is removed one by one, and arranges ground supply system, water injection well ground as shown in Figure 5
Feed system schematic diagram, the ground supply system include electric power system, water system and control system.
The electric power system includes power supply 15, frequency converter 17, by power cable 16 and the entrance of applications of coiled tubing unit 36 successively
Connection, by adjusting the power output of frequency converter 17, and then electric heater is adjusted in shaft bottom heating power.
The water system includes water treatment facilities 24, water storage device 25, metering device 26, supercharging device 35, liquid flow
Gauge 19, temperature sensor 21, pressure sensor 20, applications of coiled tubing unit 36, the water treatment facilities 24, water storage device 25,
Supercharging device 35, fluid flowmeter 19, temperature sensor 21, pressure sensor 20 are via liquid line 22 and applications of coiled tubing unit
36 are sequentially connected, and the applications of coiled tubing unit 36 is connected to water injection well 37；The water treatment facilities 24 connects water source, to injection
Water is filtered, degassing process, the water after filtering is fed into water storage device 25, the inside of water storage device 25 is provided with metering device
26, to monitor the inside water-holding quantity of water storage device 25, the supercharging device 35 provides operating pressure, the liquid flow for injection water
Gauge 19, pressure sensor 20 and temperature sensor 21 record water system operational data, the applications of coiled tubing unit 36 in real time
Entrance is respectively connected to liquid line 22 and power cable 16, and will inject water and work electricity consumption by coiled tubing and be delivered to well
Under.
The control system includes controller 32 and signal receiver 33, by signal-transmitting cable 34 and electric power system
Frequency converter 17 is connected, to the monitoring working condition of frequency converter 17, and being implemented remotely to frequency converter 17 by controller 32 in real time
Control, pass through temperature sensor 21, pressure sensor 20, fluid flowmeter 19, increasing in signal-transmitting cable 34 and water system
Pressure device 35, metering device 26 connect, and implement monitoring water system working condition by controller 32, and realize to water system
Remote control.
Underground movable electric heating system in the step 4, as shown in fig. 6, including electric heater 40, centralizer 13,
Packer 39 and coiled tubing 38, at the bottom of water injection well 1, successively by electric heater 40, centralizer 13, packer 39 by coiled tubing
In 38 tripping in water injection wells, electric heater 40 seals packer 39 after reaching the predeterminated position of horizontal segment 7, empty to form closed water filling
Between, power cable 16 and liquid line 22 are located inside coiled tubing 38.
Step 5, heating exploitation, injection water and work are provided to underground movable electric heating system by ground supply system
Make electricity consumption, hot water is generated in underground and is injected in storage, natural gas and stratum water are collected by producing well 2, pass through supercharging device
35 regulation injected water volumes, adjust power output of the power supply 15 to electric heater 40, electric heater 40 is in level by frequency converter 17
Section is moveable, by adjusting the length of the G.I.H of coiled tubing 38, can adjust electric heater 40 in the horizontal segment of water injection well 1
7 position, to realize the adjustable heating of diverse location, different capacity, and natural gas is implemented to exploit from producing well 2.
Claims (7)
- A kind of 1. method of parallel water horizontal well hot-water flooding exploitation of gas hydrate, it is characterised in that methods described includes following Step：Step 1, arrangement horizontal-well network, with reference to geologic information, arrangement parallel, horizontal well pattern is stored to target, two mouthfuls of horizontal saliva are put down in well pattern Well is one group, is carried positioned at storage high-order bit well as water injection well, lower curtate position well as producing well by parallel level distribution well Height can employ gas hydrates reserves；Step 2, completion practice, parallel, horizontal well pattern arrangement carry out supporting completion practice after completing；Step 3, decompression exploitation, after supporting completion practice, the supporting ground system of located production wells, implement to water injection well and producing well Decompression exploitation, until without economic benefit；Step 4, arrangement heating system, heating system include ground supply system and underground movable electric heating system；Step 5, heating exploitation, injection hot water is stored to gas hydrates by water injection well, and natural gas is collected from producing well And stratum water.
- A kind of 2. method of parallel water horizontal well hot-water flooding exploitation of gas hydrate as claimed in claim 1, it is characterised in that institute It can be in the same direction or reverse that water injection well horizontal segment bearing of trend, which is stated, with the producing well horizontal segment bearing of trend.
- A kind of 3. method of parallel water horizontal well hot-water flooding exploitation of gas hydrate as claimed in claim 1, it is characterised in that institute State supporting completion practice and be divided into straight well section completion and horizontal segment completion, straight well section depth is more than level in the straight well section completion Section, form liquid storage chamber；The horizontal segment completion is well-case perforating completion.
- A kind of 4. method of parallel water horizontal well hot-water flooding exploitation of gas hydrate as claimed in claim 1, it is characterised in that institute It is the tripping in electric submersible pump in water injection well and producing well to state decompression exploitation, and shaft bottom is drawn water by oil pipe, passes through oil pipe and sleeve ring Empty part gas production.
- A kind of 5. method of parallel water horizontal well hot-water flooding exploitation of gas hydrate as claimed in claim 1, it is characterised in that institute Stating the supporting ground system of producing well in decompression exploitation includes electric power system, produced water treatment system, extraction gas processing system and control System processed, the electric power system include power supply, frequency converter；The produced water treatment system include water storage device, water treatment facilities, Control valve, temperature sensor, pressure sensor, fluid flowmeter；The extraction gas processing system includes warehousing and transportation facilities, natural Gas disposal equipment, gas-liquid separator, control valve, temperature sensor, pressure sensor, gas flowmeter；The control system Including controller and signal receiver.
- A kind of 6. method of parallel water horizontal well hot-water flooding exploitation of gas hydrate as claimed in claim 1, it is characterised in that institute Stating ground supply system includes electric power system, water system and control system, and the electric power system includes power supply, frequency converter；Institute Stating water system includes water treatment facilities, water storage device, metering device, supercharging device, fluid flowmeter, temperature sensor, pressure Force snesor, applications of coiled tubing unit；The control system includes controller and signal receiver.
- A kind of 7. method of parallel water horizontal well hot-water flooding exploitation of gas hydrate as claimed in claim 1, it is characterised in that institute Stating underground movable electric heating system includes electric heater, centralizer, packer and coiled tubing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710987944.6A CN107542441A (en) | 2017-10-23 | 2017-10-23 | A kind of method of parallel water horizontal well hot-water flooding exploitation of gas hydrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710987944.6A CN107542441A (en) | 2017-10-23 | 2017-10-23 | A kind of method of parallel water horizontal well hot-water flooding exploitation of gas hydrate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107542441A true CN107542441A (en) | 2018-01-05 |
Family
ID=60967206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710987944.6A Withdrawn CN107542441A (en) | 2017-10-23 | 2017-10-23 | A kind of method of parallel water horizontal well hot-water flooding exploitation of gas hydrate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107542441A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110331961A (en) * | 2018-03-30 | 2019-10-15 | 中国石油化工股份有限公司 | Natural gas skid gas collecting apparatus |
| CN114320240A (en) * | 2021-12-30 | 2022-04-12 | 中国石油大学(北京) | Marine hydrate gathering and injecting system and method |
| CN115263248A (en) * | 2021-04-30 | 2022-11-01 | 中石化石油工程技术服务有限公司 | Method for exploiting ocean hydrate by double horizontal wells |
| CN115370325A (en) * | 2022-09-26 | 2022-11-22 | 中国科学院广州能源研究所 | System and method for exploiting marine natural gas hydrate resources |
| US20240093579A1 (en) * | 2022-09-13 | 2024-03-21 | China University Of Petroleum (East China) | High-efficiency yield-increasing exploitation method for natural gas hydrates |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1609409A (en) * | 2004-11-23 | 2005-04-27 | 中国科学院广州能源研究所 | Method and apparatus for producing natural gas hydras utilizing microwave heating |
| CN103726817A (en) * | 2014-01-23 | 2014-04-16 | 辽宁石油化工大学 | Method and device for exploiting natural gas hydrates by means of microwave technique |
-
2017
- 2017-10-23 CN CN201710987944.6A patent/CN107542441A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1609409A (en) * | 2004-11-23 | 2005-04-27 | 中国科学院广州能源研究所 | Method and apparatus for producing natural gas hydras utilizing microwave heating |
| CN103726817A (en) * | 2014-01-23 | 2014-04-16 | 辽宁石油化工大学 | Method and device for exploiting natural gas hydrates by means of microwave technique |
Non-Patent Citations (1)
| Title |
|---|
| 吴传芝等: "天然气水合物开采技术研究进展", 《地质科技情报》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110331961A (en) * | 2018-03-30 | 2019-10-15 | 中国石油化工股份有限公司 | Natural gas skid gas collecting apparatus |
| CN115263248A (en) * | 2021-04-30 | 2022-11-01 | 中石化石油工程技术服务有限公司 | Method for exploiting ocean hydrate by double horizontal wells |
| CN114320240A (en) * | 2021-12-30 | 2022-04-12 | 中国石油大学(北京) | Marine hydrate gathering and injecting system and method |
| US20240093579A1 (en) * | 2022-09-13 | 2024-03-21 | China University Of Petroleum (East China) | High-efficiency yield-increasing exploitation method for natural gas hydrates |
| US11952869B1 (en) * | 2022-09-13 | 2024-04-09 | China University Of Petroleum (East China) | High-efficiency yield-increasing exploitation method for natural gas hydrates |
| CN115370325A (en) * | 2022-09-26 | 2022-11-22 | 中国科学院广州能源研究所 | System and method for exploiting marine natural gas hydrate resources |
| CN115370325B (en) * | 2022-09-26 | 2023-06-09 | 中国科学院广州能源研究所 | System and method for exploiting marine natural gas hydrate resources |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107542441A (en) | A kind of method of parallel water horizontal well hot-water flooding exploitation of gas hydrate | |
| CN107542440A (en) | A kind of method of U-shaped well microwave heating exploitation of gas hydrate | |
| CN107676061A (en) | A kind of method of parallel water horizontal well exploitation offshore natural gas hydrate | |
| CN105003237B (en) | Geothermal exploitation of natural gas hydrates and CO2Integrated device and method for exhaust gas reinjection treatment | |
| CN107514245A (en) | A kind of method of gas hydrates row formula horizontal wells | |
| CN103410488B (en) | Gas hydrates water pumping gas production quarrying apparatus and exploitation method thereof | |
| CN107575195A (en) | A kind of method that gas hydrates parallel water horizontal well mixed phase drives exploitation | |
| CN107514248A (en) | A kind of method of gas hydrates parallel water horizontal well chemical flooding exploitation | |
| CN107676060A (en) | A kind of method of the U-shaped well microwave heating exploitation of gas hydrates | |
| CN108104776B (en) | A kind of water erosion method exploiting ocean natural gas hydrates device of combination decompression | |
| CN107575201A (en) | A kind of method of gas hydrates parallel water horizontal well microwave heating exploitation | |
| CN107701150A (en) | A kind of method of offshore natural gas hydrate parallel water horizontal well exploitation | |
| CN102587873B (en) | Carbon oxide huff-n-puff, water control and oil increment method for horizontal well | |
| CN109695441A (en) | A kind of method of parallel water horizontal well microwave heating exploitation of gas hydrate | |
| CN107795302B (en) | A kind of Gas Hydrate In Sea Areas decompression quarrying apparatus and its recovery method | |
| CN108691527A (en) | A kind of method that individual well takes thermal medium exploitation hot water type geothermal energy | |
| CN107575200A (en) | A kind of method of gas hydrates parallel water horizontal well exploitation | |
| CN107780888A (en) | Gas hydrates pilot production analogue means and method | |
| CN107558977A (en) | A kind of method of row's formula horizontal well microwave heating exploitation of gas hydrate | |
| CN107575196A (en) | A kind of method that gas hydrates row's formula horizontal well mixed phase drives exploitation | |
| CN103114828A (en) | Setting method of underground throttle technological parameter | |
| CN107575202A (en) | A kind of method of gas hydrates parallel water horizontal well hot-water flooding exploitation | |
| CN107542438A (en) | A kind of method of parallel water horizontal well exploitation of gas hydrate | |
| CN107558976A (en) | A kind of method of gas hydrates row's formula horizontal well hot-water flooding exploitation | |
| Han et al. | Study and pilot test of multiple thermal-fluid stimulation in offshore Nanpu oilfield |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180105 |
|
| WW01 | Invention patent application withdrawn after publication |