CN107514245A - A kind of method of gas hydrates row formula horizontal wells - Google Patents
A kind of method of gas hydrates row formula horizontal wells Download PDFInfo
- Publication number
- CN107514245A CN107514245A CN201710977325.9A CN201710977325A CN107514245A CN 107514245 A CN107514245 A CN 107514245A CN 201710977325 A CN201710977325 A CN 201710977325A CN 107514245 A CN107514245 A CN 107514245A
- Authority
- CN
- China
- Prior art keywords
- well
- water
- gas
- horizontal
- gas hydrates
- 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- Withdrawn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
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0099—Equipment or details not covered by groups E21B15/00 - E21B40/00 specially adapted for drilling for or production of natural hydrate or clathrate gas reservoirs; Drilling through or monitoring of formations containing gas hydrates or clathrates
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/30—Specific pattern of wells, e.g. optimizing the spacing of wells
- E21B43/305—Specific pattern of wells, e.g. optimizing the spacing of wells comprising at least one inclined or horizontal well
Abstract
A kind of method of gas hydrates row formula horizontal wells, belong to the production technique field of gas hydrates.Methods described includes：With reference to geologic information, arrangement row's formula horizontal-well network and supporting completion practice are stored to target, decompression exploitation is implemented until without economic benefit by horizontal well after completion, fracturing work is implemented to horizontal well after decompression exploitation, then ground supply system and insulated tubing 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 storage that the present invention is applied to poor connectivity, storage is thick, gas hydrates saturation degree is low, horizontal well by storing from arrangement row formula distribution to target, which improves, can employ gas hydrates reserves, realize that hot-water flooding is exploited using insulated tubing heating system, the efficiency of heating surface can be improved, reduce thermal loss, and gas production efficiency is improved, increase economic benefit.
Description
Technical field
A kind of method of gas hydrates row formula horizontal wells, belong to the production technique field of gas hydrates,
Heating and the method for voltage drop method exploitation of gas hydrate are comprehensively utilized more particularly to a kind of.
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 gas hydrates row's formula horizontal wells, methods described includes：With reference to geology
Data, arrangement row's formula horizontal-well network and supporting completion practice are stored to target, is exploited after completion by horizontal well implementation decompression straight
To without economic benefit, fracturing work is implemented to horizontal well after decompression exploitation, then water injection well arrange ground supply system and every
Deep fat pipe heating system, injection hot water is stored to gas hydrates by water injection well, and from producing well to natural gas and extraction
Water is collected；The storage that the present invention is applied to poor connectivity, storage is thick, gas hydrates saturation degree is low, by target
The horizontal well of storage arrangement row formula distribution, which improves, can employ gas hydrates reserves, realized and noted using insulated tubing heating system
Hot water is exploited, and can improve the efficiency of heating surface, reduces thermal loss, and improves gas production efficiency, increases economic benefit.
To achieve these goals, the invention provides a kind of method of gas hydrates row's formula horizontal wells, institute
The method of stating comprises the steps：
Step 1, arrangement row's formula horizontal-well network, with reference to geologic information, arrangement row's formula horizontal-well network, horizontal well are stored to target
It is divided into water injection well and producing well, gas hydrates reserves can be employed to improve by arranging formula level distribution well；
Step 2, completion practice, row's formula horizontal-well network 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, fracturing work, in well layout frac system after decompression exploitation, fracturing work is implemented to net horizontal section；
Step 5, arrangement heating system, heating system include ground supply system and insulated tubing heating system；
Step 6, 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.
Formula horizontal-well network is arranged in the step 1 to be included：Water injection well direction described in row's formula horizontal-well network and the life
It can be in the same direction or reverse to produce well direction；The horizontal segment of water injection well and producing well in row's formula horizontal-well network
Can be isometric or non-isometric；Water injection well and producing well can be aligned fashions in row's formula horizontal-well network
Or be dislocatedly distributed；The water injection well horizontal segment depth and the producing well horizontal segment depth can be it is contour,
The water injection well horizontal segment can also be located above or below the producing well horizontal segment；The distance between each well is according to storage bar
Part can change within the specific limits.
Preferably, row's formula horizontal-well network arrangement scope is：Horizontal-well network spacing range 300-1000 rice, horizontal segment length
Spend scope 500-2000 rice.
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, implementation steps 4.
Frac system in the step 4, including agitating device, pressure break liquid container, supercharging device, pressure sensor, temperature
Sensor, fluid flowmeter, applications of coiled tubing unit, controller and signal receiver, wherein agitating device, pressure break liquid container, increase
Pressure device, pressure sensor, temperature sensor and fluid flowmeter are connected to applications of coiled tubing unit one by one by liquid line, even
Continuous oil pipe device connection fracture well head, controller and signal receiver are filled by signal-transmitting cable and pressure break liquid container, supercharging
Put, the connection of pressure sensor, temperature sensor, fluid flowmeter, monitoring frac system working condition is implemented by controller, and
Realize to the accurate control of fracturing work；The agitating device include agitator tank, trucd mixer or other there is the conventional of agitating function
Equipment, the pressure break liquid container include wet tank, tank car or other common equipments with storage fracturing fluid function, the increasing
Pressure device include compression pump, fracturing unit truck or other there is the common equipment of function of increasing pressure, the applications of coiled tubing unit includes continuous
The equipment of oil pipe car or other conventional control coiled tubings, the controller include computer, tablet personal computer and other have
The conventional equipment of control function, the signal receiver are the conventional equipment with signal reception, transformation function.
The storage that fracturing work is applied to poor connectivity in the step 4, storage is thick, gas hydrates saturation degree is low,
Increase storage connectedness by way of pressure break, to reach the purpose for improving gas recovery factor；The pressure break embodiment bag
Include water injection well horizontal segment pressure break, producing well horizontal segment pressure break, water injection well horizontal segment and producing well horizontal segment concurrent fracturing；The pressure
Splitting can be adjusted for conventional fracturing process, fracture length according to actual storage situation.
Ground supply system described in the step 5 includes electric power system, water system and control system.
The electric power system includes power supply, frequency converter, ribbon heater attachment means, is connected successively with water injection well by power cable
Connect, by adjusting power converter output, and then adjust insulated tubing heating system in underground heating power；The power supply includes
Generator, commercial power and various normal power supplies, the ribbon heater attachment means are that the routine with connection, fixing function is set
It is standby.
The water system includes water treatment facilities, water storage device, metering device, supercharging device, fluid flowmeter, temperature
Sensor, pressure sensor, the water treatment facilities, water storage device, supercharging device, fluid flowmeter, temperature sensor, pressure
Sensor is sequentially connected via liquid line and water injection well；The water treatment facilities connects water source, injection water is filtered,
Degassing process, the water after filtering is fed into water storage device, metering device is provided with inside the water storage device, to monitor water storage dress
Internal water-holding quantity is put, the supercharging device provides operating pressure, the fluid flowmeter, pressure sensor and temperature for injection water
Sensor records water system operational data in real time；The water source includes well water, seawater, stratum recovered water and other conventional water
Source, the water treatment facilities are included with the conventional water treatment equipment that airway dysfunction is dissolved in filtering, decomposition water, the water storage device
Including water pot and other have and deposit the container of water storage function, the metering device, which includes tank gage and other, has measurement water
The device of bit function, the supercharging device include water pump, pump truck and other there is the conventional supercharging device of function of increasing pressure, the temperature
It is conventional equipment to spend sensor, pressure sensor, fluid flowmeter, liquid line.
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.
Insulated tubing heating system in the step 5, including insulated tubing, ribbon heater, centralizer, packer and loudspeaker
Mouthful, in water injection well, tripping in horn mouth, insulated tubing, packer, centralizer, horn mouth will envelopes after reaching predeterminated position successively
Sealed every device, to form closed water filling space, the packer, centralizer can be one or multiple, the electric heating
Band is fixed on insulated tubing inwall, and the ribbon heater can be one or a plurality of；The ribbon heater be with insulation,
Electrical heating, the conventional equipment of corrosion proof function, the length of ribbon heater, heating power can be adjusted according to actual storage condition,
The fixed form of ribbon heater includes cementing and other conventional fixed forms, and the packer, centralizer is can be with insulated tubings
Matching used conventional equipment, the insulated tubing, horn mouth are conventional equipment, according to the adjustable difference of storage concrete condition
Model.
Heating exploitation specific implementation process is in the step 6, by ground supply system to insulated tubing heating system
Injection water and work electricity consumption are provided, hot water is generated in insulated tubing and is injected in storage, injection water is adjusted by supercharging device
Amount, injection rate, power output of the power supply to insulated tubing heating system is adjusted by frequency converter, collected by producing well natural
Gas and stratum water.
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 be provided with liquid storage chamber, the water generated in recovery process can into liquid storage chamber and via
Electric submersible pump is discharged, and is made output gas avoid mixing with water in underground, can effectively be reduced the water content of natural gas in oil jacket annular space, is increased
Gas upward velocity, and then improve production efficiency.
3) present invention is heated by insulated tubing heating system to injection water, is heated using underground, and thermal loss is small,
Energy utilization rate is high, and heat time, power are adjustable, and safe and reliable.
4) present invention can adopt gas hydrates reserves by storing the horizontal-well network raising of arrangement row's formula to target, relative to
Traditional straight well well pattern, horizontal well patterns, row's formula horizontal-well network of the present invention can improve in storage to a greater extent can adopt gas water
Compound reserves.
5) present invention increases storage connectedness by way of pressure break, can increase poor connectivity, storage thickness, natural gas hydration
The low storage of thing saturation degree is connective, to reach the purpose for improving gas recovery factor.
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 horizontal-well network aligned fashion schematic diagram in the same direction.
Fig. 2 is the reverse aligned fashion schematic diagram of horizontal-well network.
Fig. 3 is that horizontal-well network is dislocatedly distributed schematic diagram in the same direction.
Fig. 4 is that horizontal-well network is reversely dislocatedly distributed schematic diagram.
Fig. 5 is horizontal segment depth schematic diagram.
Fig. 6 is decompression exploitation completion schematic diagram.
Fig. 7 is producing well ground configuration schematic diagram.
Fig. 8 is frac system ground schematic diagram.
Fig. 9 is water injection well pressure break schematic diagram.
Figure 10 is producing well pressure break schematic diagram.
Figure 11 is water injection well and producing well concurrent fracturing schematic diagram.
Figure 12 is water injection well ground feed system schematic diagram.
Figure 13 is insulated tubing internal structure schematic diagram.
Figure 14 is insulated tubing 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, pressure break liquid container 38, agitating device 39, fracture well head 40, fracturing fracture 41, electricity
Tropical attachment means 42, water injection well 43, insulated tubing 44, ribbon heater 45, packer 46, horn mouth.
Embodiment
The embodiment of the present invention provides a kind of method of gas hydrates row formula horizontal wells, and methods described includes：Knot
Geologic information is closed, arrangement row's formula horizontal-well network and supporting completion practice are stored to target, implements to be depressured by horizontal well after completion
Exploitation implements fracturing work after decompression exploitation until without economic benefit to horizontal well, then in water injection well arrangement ground supply system
System and insulated tubing heating system, injection hot water is stored to gas hydrates by water injection well, and from producing well to natural gas
And recovered water is collected.
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 gas hydrates row's formula horizontal wells, methods described is included such as
Lower step：
Step 1, arrangement row's formula horizontal-well network, with reference to geologic information, arrangement row's formula horizontal-well network, horizontal well are stored to target
It is divided into water injection well and producing well, gas hydrates reserves can be employed to improve by arranging formula level distribution well, arranges formula horizontal well
Net has following several arrangement modes：
As shown in figure 1, Fig. 1 is horizontal-well network aligned fashion schematic diagram in the same direction, water injection well 1 is distributed in the same direction with producing well 2, note
The horizontal segment of well 1 and the horizontal segment of producing well 2 are in laterally aligned distribution.
As shown in Fig. 2 Fig. 2 is the reverse aligned fashion schematic diagram of horizontal-well network, water injection well 1 is reversely distributed with producing well 2, note
The horizontal segment of well 1 and the horizontal segment of producing well 2 are in laterally aligned distribution.
It is dislocatedly distributed in the same direction schematic diagram as shown in figure 3, Fig. 3 is horizontal-well network, water injection well 1 is distributed in the same direction with producing well 2, note
The horizontal segment of well 1 and the horizontal segment of producing well 2 are distributed in transversion malposition, and after being located at the heel of water injection well 1 at the heel of producing well 2
Side.
Reversely it is dislocatedly distributed schematic diagram as shown in figure 4, Fig. 4 is horizontal-well network, water injection well 1 is reversely distributed with producing well 2, note
The horizontal segment of well 1 and the horizontal segment of producing well 2 are distributed in transversion malposition, and before being located at the heel of water injection well 1 at the tiptoe of producing well 2
Side.
Water injection well horizontal segment is placed with following several ways with producing well horizontal segment depth, as shown in figure 5, deep for horizontal segment
Spend schematic diagram：
Fig. 5 A are that the horizontal segment depth of setting of water injection well 1 is less than the horizontal segment depth of setting of producing well 2, water injection well 1 and producing well 2
Horizontal segment is in gas hydrates reservoir 3, under overlying rock 4, on lower rock stratum 5.
Fig. 5 B are that the horizontal segment depth of setting of water injection well 1 is equal to the horizontal segment depth of setting of producing well 2, water injection well 1 and producing well 2
Horizontal segment is in gas hydrates reservoir 3, under overlying rock 4, on lower rock stratum 5.
Fig. 5 C are that the horizontal segment depth of setting of water injection well 1 is more than the horizontal segment depth of setting of producing well 2, water injection well 1 and producing well 2
Horizontal segment is in gas hydrates reservoir 3, under overlying rock 4, on lower rock stratum 5.
Step 2, completion practice, row's formula horizontal-well network arrangement carry out supporting completion practice after completing, and decompression as shown in Figure 6 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 7, 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, fracturing work, in well layout frac system after decompression exploitation, fracturing work is implemented to net horizontal section, such as
The schematic diagram of frac system ground shown in Fig. 8, the frac system, including agitating device 38, pressure break liquid container 37, supercharging device
35th, pressure sensor 20, temperature sensor 21, fluid flowmeter 19, applications of coiled tubing unit 36, controller 32 and signal receiver
33, wherein agitating device 38, pressure break liquid container 37, supercharging device 35, pressure sensor 20, temperature sensor 21 and fluid flow
Meter 19 is connected to applications of coiled tubing unit 36 one by one by liquid line 22, and fracture well head 39 is connected by applications of coiled tubing unit 36, controls
Device 32 and signal receiver 33 processed pass through signal-transmitting cable 34 and the internal metering devices 26 of pressure break liquid container 37, supercharging device
35th, pressure sensor 20, temperature sensor 21, fluid flowmeter 19 connect, and implement monitoring frac system work by controller 32
Make state, and realize to the accurate control of fracturing work.
The storage that fracturing work is applied to poor connectivity in step 4, storage is thick, gas hydrates saturation degree is low, passes through
The mode of pressure break increases storage connectedness, to reach the purpose for improving gas recovery factor；The pressure break embodiment includes note
Well horizontal segment pressure break, producing well horizontal segment pressure break, water injection well horizontal segment and producing well horizontal segment concurrent fracturing；As shown in Figure 9
Water injection well pressure break schematic diagram, fracturing fracture 40 are located at the horizontal segment of water injection well 1；The schematic diagram of producing well pressure break shown in Figure 10, pressure break are split
Seam 40 is located at the horizontal segment of producing well 2；Water injection well shown in Figure 11 and producing well concurrent fracturing schematic diagram, fracturing fracture 40 are located at water filling
The horizontal segment of well 1 and the horizontal segment of producing well 2；The pressure break is conventional fracturing process, and fracture length can be with according to actual storage situation
It is adjusted.
Step 5, arrangement heating system, heating system include ground supply system and insulated tubing heating system；Such as Figure 12
Shown water injection well ground 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, ribbon heater attachment means 41, by power cable 16 and water injection well
Mouth 42 is sequentially connected, and by adjusting the power output of frequency converter 17, and then adjusts ribbon heater 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, the water treatment facilities 24, water storage device 25, supercharging device 35, liquid
Flowmeter 19, temperature sensor 21, pressure sensor 20 are sequentially connected via liquid line 22 and water injection well 42, at the water
Manage device 24 and connect water source, injection water is filtered, degassing process, the water after filtering is fed into water storage device 25, the storage
The inside of water installations 25 is provided with metering device 26, and to monitor the inside water-holding quantity of water storage device 25, the supercharging device 35 is injection
Water provides operating pressure, and the fluid flowmeter 19, pressure sensor 20 and temperature sensor 21 record water system work in real time
Make data.
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.
Insulated tubing heating system in the step 5, including insulated tubing 43, ribbon heater 44, centralizer 13, packer 45
And horn mouth 46, as shown in figure 13, insulated tubing internal structure schematic diagram, the ribbon heater 44 is fixed in insulated tubing 43
Wall, Figure 13 A are insulated tubing internal structure top view, and Figure 13 B are insulated tubing internal structure sectional view；As shown in figure 14, every
Deep fat pipe heating system schematic diagram, in water injection well, tripping in horn mouth 46, insulated tubing 43, packer 45, centralizer successively
13, horn mouth 46 seals packer 45 after reaching predeterminated position, to form closed water filling space, ribbon heater 44 in the present embodiment
For four.
Step 6, 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, injection water and work electricity consumption are provided to insulated tubing heating system by ground supply system, in insulation oil
Hot water is generated in pipe 43 and is injected in gas hydrates reservoir 3, injected water volume, injection rate are adjusted by supercharging device 35,
Power output of the power supply 15 to insulated tubing heating system is adjusted by frequency converter 17, natural gas and ground are collected by producing well 2
Layer water.
Claims (10)
- A kind of 1. method of gas hydrates row formula horizontal wells, it is characterised in that methods described comprises the steps：Step 1, arrangement row's formula horizontal-well network, with reference to geologic information, arrangement row's formula horizontal-well network is stored to target, horizontal well is divided into Water injection well and producing well, gas hydrates reserves can be employed to improve by arranging formula level distribution well；Step 2, completion practice, row's formula horizontal-well network 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, fracturing work, in well layout frac system after decompression exploitation, fracturing work is implemented to net horizontal section；Step 5, arrangement heating system, heating system include ground supply system and insulated tubing heating system；Step 6, 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 gas hydrates row formula horizontal wells as claimed in claim 1, it is characterised in that the water filling Well horizontal segment bearing of trend and the producing well horizontal segment bearing of trend can be in the same direction or reverse.
- A kind of 3. method of gas hydrates row formula horizontal wells as claimed in claim 1, it is characterised in that the water filling Well horizontal segment depth can be contour with the producing well horizontal segment depth, and the water injection well horizontal segment can also be located at described Above or below producing well horizontal segment.
- 4. a kind of method of gas hydrates row formula horizontal wells as claimed in claim 1, it is characterised in that described supporting Completion practice is divided into straight well section completion and horizontal segment completion, and straight well section depth is more than horizontal segment in the straight well section completion, is formed Liquid storage chamber；The horizontal segment completion is well-case perforating completion.
- A kind of 5. method of gas hydrates row formula horizontal wells as claimed in claim 1, it is characterised in that the decompression Exploit as the tripping in electric submersible pump in water injection well and producing well, shaft bottom is drawn water by oil pipe, passes through oil pipe and casing annulus part Gas production.
- A kind of 6. method of gas hydrates row formula horizontal wells as claimed in claim 1, it is characterised in that the decompression The supporting ground system of producing well includes electric power system, produced water treatment system, extraction gas processing system and control system in exploitation, The electric power system includes power supply, frequency converter；The produced water treatment system includes water storage device, water treatment facilities, regulating valve Door, temperature sensor, pressure sensor, fluid flowmeter；The extraction gas processing system includes warehousing and transportation facilities, natural gas processing Equipment, gas-liquid separator, control valve, temperature sensor, pressure sensor, gas flowmeter；The control system includes control Device and signal receiver processed.
- A kind of 7. method of gas hydrates row formula horizontal wells as claimed in claim 1, it is characterised in that the pressure break System includes agitating device, pressure break liquid container, supercharging device, pressure sensor, temperature sensor, fluid flowmeter, continuous oil Pipe device, controller and signal receiver.
- A kind of 8. method of gas hydrates row formula horizontal wells as claimed in claim 1, it is characterised in that the pressure break Operation includes water injection well horizontal segment pressure break, producing well horizontal segment pressure break, water injection well horizontal segment and producing well horizontal segment concurrent fracturing, The pressure break is conventional fracturing process.
- A kind of 9. method of gas hydrates row formula horizontal wells as claimed in claim 1, it is characterised in that the ground Feed system includes electric power system, water system and control system, and the electric power system includes power supply, frequency converter, ribbon heater company Connection device；The water system includes water treatment facilities, water storage device, metering device, supercharging device, fluid flowmeter, temperature Sensor, pressure sensor；The control system includes controller and signal receiver.
- A kind of 10. method of gas hydrates row formula horizontal wells as claimed in claim 1, it is characterised in that it is described every Deep fat pipe heating system includes insulated tubing, ribbon heater, centralizer, packer and horn mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710977325.9A CN107514245A (en) | 2017-10-23 | 2017-10-23 | A kind of method of gas hydrates row formula horizontal wells |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710977325.9A CN107514245A (en) | 2017-10-23 | 2017-10-23 | A kind of method of gas hydrates row formula horizontal wells |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107514245A true CN107514245A (en) | 2017-12-26 |
Family
ID=60727360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710977325.9A Withdrawn CN107514245A (en) | 2017-10-23 | 2017-10-23 | A kind of method of gas hydrates row formula horizontal wells |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107514245A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108194055A (en) * | 2018-01-03 | 2018-06-22 | 伍丕济 | The recovery method of combustible ice |
| CN108412467A (en) * | 2018-02-23 | 2018-08-17 | 中国石油大学(北京) | A kind of the well pattern mining system and recovery method of gas hydrates |
| CN110344801A (en) * | 2018-04-03 | 2019-10-18 | 齐鲁工业大学 | Fracturing work method, recovery method and mining system for combustible ice exploitation |
| CN110761767A (en) * | 2019-11-11 | 2020-02-07 | 重庆大学 | Method for efficiently dissolving methane to promote exploitation of natural gas hydrate |
| WO2022206713A1 (en) * | 2021-03-29 | 2022-10-06 | 北京红蓝黑能源科技有限公司 | Method and device for heating formation water directionallay and quantitatively in delayed manner |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6299256B1 (en) * | 2000-05-15 | 2001-10-09 | The United States Of America As Represented By The Department Of Energy | Method and apparatus for recovering a gas from a gas hydrate located on the ocean floor |
| WO2003021079A1 (en) * | 2001-08-28 | 2003-03-13 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method and device for the extraction and transport of gas hydrates and gases from gas hydrates |
| CN1944949A (en) * | 2006-08-09 | 2007-04-11 | 中国石油大学(华东) | Method for recovering sea bottom hydrate by single well heat injection circulation |
| CN101555797A (en) * | 2009-05-19 | 2009-10-14 | 四川大学 | Extraction device for undersea gas hydrate and extraction method thereof |
| CN102587877A (en) * | 2012-03-08 | 2012-07-18 | 中国海洋石油总公司 | Multi-element thermal fluid displacement process |
| CN102767356A (en) * | 2012-08-08 | 2012-11-07 | 张方礼 | Method for using combustion and vapor combination flooding to exploit thick oil |
| CN103410488A (en) * | 2013-09-05 | 2013-11-27 | 中国石油大学(华东) | Natural gas hydrate water discharge gas production exploitation device and exploitation method of natural gas hydrate water discharge gas production exploitation device |
-
2017
- 2017-10-23 CN CN201710977325.9A patent/CN107514245A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6299256B1 (en) * | 2000-05-15 | 2001-10-09 | The United States Of America As Represented By The Department Of Energy | Method and apparatus for recovering a gas from a gas hydrate located on the ocean floor |
| WO2003021079A1 (en) * | 2001-08-28 | 2003-03-13 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method and device for the extraction and transport of gas hydrates and gases from gas hydrates |
| CN1944949A (en) * | 2006-08-09 | 2007-04-11 | 中国石油大学(华东) | Method for recovering sea bottom hydrate by single well heat injection circulation |
| CN101555797A (en) * | 2009-05-19 | 2009-10-14 | 四川大学 | Extraction device for undersea gas hydrate and extraction method thereof |
| CN102587877A (en) * | 2012-03-08 | 2012-07-18 | 中国海洋石油总公司 | Multi-element thermal fluid displacement process |
| CN102767356A (en) * | 2012-08-08 | 2012-11-07 | 张方礼 | Method for using combustion and vapor combination flooding to exploit thick oil |
| CN103410488A (en) * | 2013-09-05 | 2013-11-27 | 中国石油大学(华东) | Natural gas hydrate water discharge gas production exploitation device and exploitation method of natural gas hydrate water discharge gas production exploitation device |
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 |
|---|---|---|---|---|
| CN108194055A (en) * | 2018-01-03 | 2018-06-22 | 伍丕济 | The recovery method of combustible ice |
| CN108194055B (en) * | 2018-01-03 | 2019-12-10 | 伍丕济 | method for exploiting combustible ice |
| CN108412467A (en) * | 2018-02-23 | 2018-08-17 | 中国石油大学(北京) | A kind of the well pattern mining system and recovery method of gas hydrates |
| CN110344801A (en) * | 2018-04-03 | 2019-10-18 | 齐鲁工业大学 | Fracturing work method, recovery method and mining system for combustible ice exploitation |
| CN110761767A (en) * | 2019-11-11 | 2020-02-07 | 重庆大学 | Method for efficiently dissolving methane to promote exploitation of natural gas hydrate |
| WO2022206713A1 (en) * | 2021-03-29 | 2022-10-06 | 北京红蓝黑能源科技有限公司 | Method and device for heating formation water directionallay and quantitatively in delayed manner |
| CN116057252A (en) * | 2021-03-29 | 2023-05-02 | 北京红蓝黑能源科技有限公司 | Method and equipment for directionally and quantitatively heating formation water in delayed mode |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107514245A (en) | A kind of method of gas hydrates row formula horizontal wells | |
| 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 | |
| CN103410488B (en) | Gas hydrates water pumping gas production quarrying apparatus and exploitation method thereof | |
| CN107542441A (en) | A kind of method of parallel water horizontal well hot-water flooding exploitation of gas hydrate | |
| CN107676060A (en) | A kind of method of the U-shaped well microwave heating exploitation of gas hydrates | |
| CN105003237B (en) | Geothermal exploitation of natural gas hydrates and CO2Integrated device and method for exhaust gas reinjection treatment | |
| CN107514248A (en) | A kind of method of gas hydrates parallel water horizontal well chemical flooding exploitation | |
| CN107575195A (en) | A kind of method that gas hydrates parallel water horizontal well mixed phase drives exploitation | |
| CN108868706B (en) | Method for exploiting natural gas hydrate by directional drilling supercritical carbon dioxide fracturing and displacement | |
| CN101089362B (en) | Improved steam oil production method | |
| CN107795302B (en) | A kind of Gas Hydrate In Sea Areas decompression quarrying apparatus and its recovery method | |
| CN107575193A (en) | A kind of method of offshore natural gas hydrate row formula horizontal wells | |
| CN107701150A (en) | A kind of method of offshore natural gas hydrate parallel water horizontal well exploitation | |
| CN107575201A (en) | A kind of method of gas hydrates parallel water horizontal well microwave heating exploitation | |
| CN110644963B (en) | Method for exploiting hydrate based on multilateral well | |
| CN113738317A (en) | Method for combined exploitation of deep coal bed gas and dry hot rock type geothermal | |
| CN109695441A (en) | A kind of method of parallel water horizontal well microwave heating exploitation of gas hydrate | |
| CN106194122A (en) | The method that a kind of oil field abandoned well transform geothermal well or sub-salt well as | |
| 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 | |
| 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 | |
| CN107558976A (en) | A kind of method of gas hydrates row's formula horizontal well hot-water flooding exploitation | |
| CN107575202A (en) | A kind of method of gas hydrates parallel water horizontal well hot-water flooding exploitation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20171226 |
|
| WW01 | Invention patent application withdrawn after publication |