CN108505977A - A method of utilizing sheath tube heater exploitation of gas hydrate - Google Patents
A method of utilizing sheath tube heater exploitation of gas hydrate Download PDFInfo
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- CN108505977A CN108505977A CN201810345979.4A CN201810345979A CN108505977A CN 108505977 A CN108505977 A CN 108505977A CN 201810345979 A CN201810345979 A CN 201810345979A CN 108505977 A CN108505977 A CN 108505977A
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- 238000000034 method Methods 0.000 title claims abstract description 32
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 239000012530 fluid Substances 0.000 claims abstract description 76
- 238000010438 heat treatment Methods 0.000 claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 claims abstract description 27
- 150000004677 hydrates Chemical class 0.000 claims abstract description 23
- 230000006837 decompression Effects 0.000 claims abstract description 14
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000011084 recovery Methods 0.000 claims abstract description 8
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 4
- 239000004917 carbon fiber Substances 0.000 claims abstract description 4
- 238000005485 electric heating Methods 0.000 claims description 88
- 238000007789 sealing Methods 0.000 claims description 57
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 46
- 238000010992 reflux Methods 0.000 claims description 21
- 238000005553 drilling Methods 0.000 claims description 19
- 230000005611 electricity Effects 0.000 claims description 13
- 238000012546 transfer Methods 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 239000013049 sediment Substances 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 4
- 102000000584 Calmodulin Human genes 0.000 claims description 3
- 108010041952 Calmodulin Proteins 0.000 claims description 3
- 238000000280 densification Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 230000002045 lasting effect Effects 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 39
- 230000000694 effects Effects 0.000 abstract description 4
- 239000003345 natural gas Substances 0.000 abstract description 4
- 239000013535 sea water Substances 0.000 abstract description 4
- 239000003570 air Substances 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract description 2
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen(.) Chemical compound [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 235000013339 cereals Nutrition 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- 235000013312 flour Nutrition 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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 OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B36/00—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/005—Heater surrounding production tube
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B36/00—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/04—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones using electrical heaters
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Pipe Accessories (AREA)
Abstract
A kind of method using sheath tube heater exploitation of gas hydrate of the invention, belong to exploitation of gas hydrates technical field, conventional cannula is replaced using sheath tube heater in this method, changed according to temperature change in pit shaft or gas production rate, adjusting set tubular type heater heating power or unlatching/closing sheath tube heater.Sheath tube heater can be divided into bushing type electric heater, bushing type fluid heater according to heating element arrangement difference, heating element used in bushing type electric heater is metallic resistance silk or carbon fiber heating silk, bushing type fluid heater heating fluid used is high-temperature gas such as air, nitrogen and natural gas etc. or high-temp liquid such as seawater.The present invention can both maintain hole wall to stablize by sheath tube heater, again can heated well week hydrate reservoir and production section pit shaft, the influence of well week or the interior secondary hydrate formed of production section pit shaft to exploitation effect in decompression recovery process is avoided, realizes that decompression heating couples exploitation of gas hydrate.
Description
Technical field
The invention belongs to exploitation of gas hydrates technical fields, are exploited using sheath tube heater more particularly, to a kind of
The method of gas hydrates.
Background technology
Gas hydrates refer to a kind of cage modle crystalline solid that natural gas is generated with water under specific temperature and pressure, seemingly
Ice and snow shape because it can be lighted, therefore is commonly called as " combustible ice ".Gas hydrates are big with energy density, distribution is wide, large storage capacity
With bury the features such as shallow, it is considered to be become 21 century ideal alternative energy source.2007~2016 Guangzhou Marine Geology tune
It looks into office and has carried out 4 gas hydrates in THE NORTHERN SLOPE OF SOUTH CHINA SEA and creep into investigation on the spot, obtain gas hydrates sample,
Probing Jing88Kou is completed in 4 investigation altogether, and 11 advantageous prospective areas, 19 metallogenic belts, tentative prediction China sea have been drawn a circle to approve at the South Sea
About 80,000,000,000 tons of oil equivalents of domain Gas Hydrate Resources.
10 days~July 9 May in 2017, China successfully realize that stock number accounts for 90% or more the whole world, exploitation using voltage drop method
The safely controllable exploitation of the maximum shale flour sand type gas hydrates of difficulty adds up aerogenesis 30.9 × 104m3, when creating aerogenesis
Long and total amount world record has established solid foundation for gas hydrates business exploitation.However, laboratory experiment and numerical value
Analog study shows in gas hydrates decompression recovery process, may be formed in well week, pit shaft or decomposition of hydrate leading edge
Secondary hydrate, well week or production section pit shaft in secondary hydrate formation can cause well week reservoir permeability reduce or occur well
Cylinder blocks, and then gas production rate and gas production is caused to reduce.It is natural especially for the low hole hyposmosis shale flour sand type in China
The formation of gas hydrate reservoir, secondary hydrate influences bigger to hydrate exploitation effect.Therefore, it is depressured and exploits for hydrate
In the process the problem of secondary gas hydrate synthesis, there is an urgent need for secondary gas hydrate synthesis in a kind of effective prevention well week or pit shaft
Recovery method.
Invention content
The purpose of the present invention is made for the secondary hydrate formed in well week in decompression recovery process or production section pit shaft
The problem of being reduced at gas production rate and gas production, a kind of method using sheath tube heater exploitation of gas hydrate is provided,
By improving temperature in well week and production section pit shaft, preventing secondary gas hydrate synthesis.
The present invention adopts the following technical scheme that realization：It is a kind of using sheath tube heater exploitation of gas hydrate
Method, which is characterized in that include the following steps：
Step 1: calmodulin binding domain CaM geologic information and gas hydrates reservoir sedimentation object feature, are stored up in gas hydrates
Design level well arrangement in layer；
Step 2: drilling well and completion, recovery well drilling is carried out using deepwater drilling platform, in gas hydrates when completion
Reservoir intends production range and transfers sheath tube heater, other intervals transfer ordinary casing, install wellhead assembly, and wellhead assembly passes through
Marine riser is connect with deepwater drilling platform, well cementation；
Step 3: installation fibre optic temperature sensor, immersible pump, submersible pump cable and bushing type heating in exploitation well shaft
Device power supply pipeline, submersible pump cable one end are connect with immersible pump, and the other end is connect with deepwater drilling platform, bushing type heating
Device power supply pipeline one end is connect with sheath tube heater, and the other end is connect with deepwater drilling platform；
Step 4: starting immersible pump, horizontal borehole pressure is gradually reduced, decompression exploitation is carried out；
Step 5: when the lasting reduction of temperature appearance or gas production rate are less than the 10% of normal value in exploitation well shaft, open
Sheath tube heater, adjusting set tubular type heater heating power makes gas production after temperature in pit shaft or gas production rate restore normal
It keeps stablizing, gas production holding may be selected to close sheath tube heater after stablizing 1 hour, and so on adjusting set tube heater
Heating power or unlatching/closing sheath tube heater realize decompression heating coupling exploitation of gas hydrate.
Described sleeve pipe formula heater is bushing type electric heater or bushing type fluid heater.
The first bushing type electric heater, described sleeve pipe formula electric heater include sleeve body, electric heating wire system, screen casing
And there is screw thread, adjacent two section sleeve bodies to use screw thread between each other for plug-in type leader cable system, the end of sleeve body
It is attached, electric heating wire double spiral groove is machined in sleeve body and crosses water helicla flute, the slot of electric heating wire double spiral groove
Width is 2mm~4mm, and slot pitch is 2mm~4mm, and screw pitch is 30mm~40mm；The groove width for crossing water helicla flute is 1mm~3mm, crosses water
The screw pitch of helicla flute is consistent with the screw pitch of electric heating wire double spiral groove, crosses water helicla flute and is inclined to set, with sleeve body axis
It is 60 degree to angle, crosses water helicla flute and electric heating wire double spiral groove arranged for interval；Electric heating wire system includes electrical heating
Silk and electric heating wire high pressure sealing female connector, a diameter of 2mm~4mm of electric heating wire are wrapped in electrical heating in a manner of double helix
In silk double spiral groove, electric heating wire passes through the through-hole in sleeve body to be connected with electric heating wire high pressure sealing female connector；Electrical heating
Silk high pressure sealing female connector is fixed on sleeve body inner wall；Screen pipe sleeve covers electric heating wire in sleeve body, screen casing
Outer diameter is consistent with the maximum outside diameter of sleeve body, to keep entire bushing type electric heater outer diameter consistent；Plug-in type leader cable system
System is by plug-in type leader cable, cable protection pipe, electric heating wire high pressure sealing pin end, leader cable high pressure sealing pin end, main electricity
Cable high pressure sealing female connector and cable protection tube fixing device are constituted, and plug-in type leader cable is placed in cable protection pipe；Cable is protected
Pillar one end is fixed on by cable protection tube fixing device on sleeve body inner wall, and the cable protection pipe other end passes through electric heating wire
High pressure sealing pin end with electric heating wire high pressure sealing female connector is mating is fixed on sleeve body inner wall；Leader cable high pressure
Sealing pin end, leader cable high pressure sealing female connector are separately positioned on plug-in type leader cable both ends end, leader cable high pressure sealing
Pin end extends to outside cable protection pipe；It is provided with bearing between cable protection tube fixing device and cable protection pipe.
It is as follows to transfer bushing type electric heater process：Before two adjacent sections bushing type electric heater is threadedly coupled, first will
The leader cable high pressure of the leader cable high pressure sealing pin end and later section bushing type electric heater of previous section bushing type electric heater
It seals female connector to be connected, the mode being then connected through a screw thread connects the sleeve body of two section bushing type electric heaters, at this time
The electric heating wire high pressure sealing pin end of later section bushing type electric heater is in electric heating wire high pressure sealing female connector and disconnects
State, after two adjacent sections bushing type electric heater connects, by the high densification of electric heating wire of later section bushing type electric heater
Envelope pin end and electric heating wire high pressure sealing female connector link together, and complete to connect between bushing type electric heater.
Second of bushing type electric heater, described sleeve pipe formula electric heater include sleeve body, electric heating wire system and sieve
The end of pipe, sleeve body has screw thread, and adjacent two section sleeve bodies are attached using screw thread between each other, in casing sheet
It is machined with electric heating wire double spiral groove on body and crosses water helicla flute, the groove width of electric heating wire double spiral groove is 2mm~4mm, slot pitch
For 2mm~4mm, screw pitch is 30mm~40mm；The groove width for crossing water helicla flute is 1mm~3mm, and the screw pitch and electricity for crossing water helicla flute add
The screw pitch of heated filament double spiral groove is consistent, crosses water helicla flute and is inclined to set, and is 60 degree with sleeve body axial direction angle, mistake
Water helicla flute and electric heating wire double spiral groove arranged for interval；Electric heating wire system includes electric heating wire and high pressure sealing joint, electricity
A diameter of 2mm~the 4mm of heater strip, is wrapped in electric heating wire double spiral groove, electric heating wire passes through high pressure in a manner of double helix
Seal nipple is connected with sheath tube heater power supply pipeline；The outer diameter of the screen casing and the maximum outside diameter one of sleeve body
It causes, to keep entire bushing type electric heater outer diameter consistent.
It is as follows to transfer bushing type electric heater process：The sleeve body of two adjacent sections bushing type electric heater is connected by screw thread
It connects, sheath tube heater power supply pipeline is fixed on sleeve body outer wall by two section sleeve bodies after being threadedly coupled, complete
It is connected between complete tube electric heater.
The electric heating wire is metallic resistance silk or carbon fiber heating silk.
Described sleeve pipe formula fluid heater includes sleeve body, screen casing and high temperature fluid pipeline, the end tool of sleeve body
There are screw thread, adjacent two section sleeve bodies to be attached between each other using screw thread, water spiral was machined in sleeve body
Slot, the groove width for crossing water helicla flute are 1mm~3mm, and screw pitch is 30mm~40mm, crosses water helicla flute and is inclined to set, with casing
Ontology axial direction angle is 60 degree, and arbitrary neighborhood two is crossed water helicla flute and is equidistantly spaced from；Screen pipe sleeve is in sleeve body, sieve
The outer diameter of pipe is consistent with the maximum outside diameter of sleeve body, to keep entire bushing type fluid heater outer diameter consistent；High temperature fluid
Pipeline includes being provided with into fluid hose and reflux pipe into one end of fluid hose into fluid hose pin end, the other end be provided with into
One end of fluid hose female connector, reflux pipe is provided with reflux pipe female connector, and the other end is provided with reflux pipe pin end, into
The internal diameter of fluid hose and reflux pipe is 2cm~4cm, two high temperature fluid pipeline Spiral distributions in sleeve body, and with
Sleeve body inner wall contacts.
It is as follows to transfer bushing type fluid heater process：Before the threaded connection of two adjacent sections bushing type fluid heater,
First by previous section bushing type fluid heater into fluid hose pin end and later section bushing type fluid heater into fluid hose
Female connector is connected, the reflux pipe female connector of previous section bushing type fluid heater and returning for later section bushing type fluid heater
Fluid hose pin end is connected；Then the sleeve body for carrying out two section bushing type fluid heaters is threadedly coupled.
The supply voltage of described sleeve pipe formula electric heater is 1000V~3000V.
By above-mentioned design scheme, the present invention can bring following advantageous effect compared with prior art：The present invention passes through
Sheath tube heater can not only maintain hole wall to stablize, but can heated well week hydrate reservoir and production section pit shaft, avoid decompression from exploiting
The influence of well week or the interior secondary hydrate formed of production section pit shaft to exploitation effect in the process.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and is constituted part of this application, this hair
Bright illustrative embodiments and their description explanation does not constitute the improper restriction of the present invention, in the accompanying drawings for understanding the present invention：
Fig. 1 is a kind of Method And Principle structural schematic diagram using sheath tube heater exploitation of gas hydrate of the invention.
Fig. 2 is a kind of schematic diagram of bushing type electric heater in the embodiment of the present invention.
Fig. 3 is the schematic diagram of another bushing type electric heater in the embodiment of the present invention.
Fig. 4 is the schematic diagram of bushing type fluid heater of the present invention.
In figure：1- seawater；2- overlying sediments objects；3- gas hydrates reservoirs；4- horizontal wells；5- sheath tube heaters；
6- deepwater drilling platforms；7- ordinary casings；8- wellhead assemblies；9- marine risers；10- fibre optic temperature sensors；11- immersible pumps；12-
Submersible pump cable；13- sheath tube heater power supply pipelines；14- sleeve bodies；15- screen casings；16- electric heating wire double helixs
Slot；17- crosses water helicla flute；18- electric heating wires；19- electric heating wire high pressure sealing female connectors；20- through-holes；The main electricity of 21- plug-in types
Cable；22- cable protection pipes；23- electric heating wire high pressure sealing pin ends；24- leader cable high pressure sealing pin ends；25- leader cables
High pressure sealing female connector；26- cable protection tube fixing devices；27- bearings；28- high pressure sealing joints；30- is into fluid hose；31- is returned
Fluid hose；32- is into fluid hose pin end；33- is into fluid hose female connector；34- reflux pipe female connectors；35- reflux pipe public access
Head.
Specific implementation mode
In order to clearly illustrate that the present invention, the present invention is done further with reference to preferred embodiments and drawings
It is bright.It will be appreciated by those skilled in the art that specifically described content is illustrative and be not restrictive below, it should not be with this
It limits the scope of the invention.In order to avoid obscuring the essence of the present invention, well known method, process are chatted there is no detailed
It states.
As shown in Figure 1, a kind of method using sheath tube heater exploitation of gas hydrate proposed by the present invention, including
Following steps：
Step 1: 3 Sediment Characteristics of calmodulin binding domain CaM geologic information and gas hydrates reservoir, gas hydrates reservoir
3 are located under seawater 1 and overlying sediments nitride layer 2,4 arrangement of design level well in gas hydrates reservoir 3, and choose
The type of sheath tube heater 5；
Step 2: drilling well and completion, recovery well drilling is carried out using deepwater drilling platform 6, when completion is hydrated in natural gas
Object reservoir 3 intends production range decentralization sheath tube heater 5, other intervals transfer ordinary casing 7, installs wellhead assembly 8, well head dress
It sets 8 to connect with deepwater drilling platform 6 by marine riser 9, cement the well；
Step 3: by marine riser 9 and wellhead assembly 8, installation fibre optic temperature sensor 10, diving in exploitation well shaft
Pump 11, submersible pump cable 12 and sheath tube heater power supply pipeline 13,12 one end of submersible pump cable are connect with immersible pump 11,
The other end is connect with deepwater drilling platform 6, and 13 one end of sheath tube heater power supply pipeline is connect with sheath tube heater 5,
The other end is connect with deepwater drilling platform 6；13 set-up time of sheath tube heater power supply pipeline heats depending on bushing type
5 type of device will illustrate one by one in the following embodiments；
Step 4: starting deep submersible pump 11, pressure in 4 sections of horizontal well is gradually reduced, decompression exploitation is carried out；
Step 5: when the lasting reduction of temperature appearance or gas production rate in the pit shaft that pit shaft inner fiber temperature sensor 10 measures
When being decreased obviously, sheath tube heater 5 is opened, wellbore system and well week reservoir are heated, prevents pit shaft interior and well Zhou Tian
Secondary hydrate is formed in right gas hydrate reservoir 3；Observe temperature variations in gas production and pit shaft, wait in pit shaft temperature or
Adjusting set tubular type heater heating power makes gas production keep stablizing after gas production rate restores normal, and it is small that gas production holding stablizes 1
When after may be selected to close sheath tube heater, and so on adjusting set tubular type heater heating power or unlatching/closing bushing type
Heater realizes decompression heating coupling exploitation of gas hydrate.
As shown in Figure 2, Figure 3 and Figure 4, the sheath tube heater 5 described in step 1 can be divided into bushing type electric heater and set
It can also be that carbon fiber adds that tubular fluid heater, wherein heating element used in bushing type electric heater, which can be metallic resistance silks,
Heated filament, bushing type fluid heater heating fluid used can be high-temperature gas, such as air, nitrogen and natural gas, can also
It is high-temp liquid, such as seawater.
Embodiment one
As shown in Fig. 2, the first bushing type electric heater, which includes sleeve body 14, electrical heating
The end of silk system, screen casing 15 and plug-in type leader cable system, sleeve body 14 has screw thread, adjacent two section sleeve bodies 14
It is attached between each other using screw thread, electric heating wire double spiral groove 16 is machined in sleeve body 14 and crosses water helicla flute
17, the groove width of electric heating wire double spiral groove 16 is 2mm~4mm, and slot pitch is 2mm~4mm, and screw pitch is 30mm~40mm；Cross water spiral shell
The groove width of spin slot 17 is 1mm~3mm, and the screw pitch for crossing water helicla flute 17 is consistent with the screw pitch of electric heating wire double spiral groove 16, crosses water
Helicla flute 17 is inclined to set, and is 60 degree with the axial angle of sleeve body 14, crosses water helicla flute 17 and electric heating wire is double
16 arranged for interval of helicla flute；Electric heating wire system includes electric heating wire 18 and electric heating wire high pressure sealing female connector 19, electrical heating
18 a diameter of 2mm~4mm of silk, are wrapped in a manner of double helix in electric heating wire double spiral groove 16, and electric heating wire 18 passes through set
Through-hole 20 on tube body 14 is connected with electric heating wire high pressure sealing female connector 19；Electric heating wire high pressure sealing female connector 19 is fixed
On 14 inner wall of sleeve body；Screen casing 15 is sleeved in sleeve body 14, covers electric heating wire 18, the outer diameter and casing of screen casing 15
The maximum outside diameter of ontology 14 is consistent, to keep entire bushing type electric heater outer diameter consistent；Screen-aperture on 15 side wall of screen casing
It is designed according to 3 sediment grain size of gas hydrates reservoir；Plug-in type leader cable system is by plug-in type leader cable 21, cable
Protection pipe 22, electric heating wire high pressure sealing pin end 23, leader cable high pressure sealing pin end 24, leader cable high pressure sealing female connector
25 and cable protection tube fixing device 26 constitute, plug-in type leader cable 21 is placed in cable protection pipe 22；Cable protection pipe 22 1
End is fixed on by cable protection tube fixing device 26 on 14 inner wall of sleeve body, and 22 other end of cable protection pipe passes through electric heating wire
High pressure sealing pin end 23 with electric heating wire high pressure sealing female connector 19 is mating is fixed on 14 inner wall of sleeve body；Main electricity
Cable high pressure sealing pin end 24, leader cable high pressure sealing female connector 25 are separately positioned on 21 both ends end of plug-in type leader cable, main
Cable high pressure sealing pin end 24 extends to outside cable protection pipe 22；Cable protection tube fixing device 26 and cable protection pipe 22 it
Between be provided with bearing 27.
The present embodiment middle sleeve formula heater 5 uses the first bushing type electric heater：
It is as follows that 5 process of sheath tube heater is transferred described in specific steps two：Two adjacent sections bushing type electric heater screw thread connects
Before connecing, first by the leader cable high pressure sealing pin end 24 of previous section bushing type electric heater and later section bushing type electrical heating
The leader cable high pressure sealing female connector 25 of device is connected, the set that the mode being then connected through a screw thread saves bushing type electric heaters by two
Tube body 14 connects, at this time the electric heating wire high pressure sealing pin end 23 of later section bushing type electric heater and electric heating wire high pressure
Sealing female connector 19 is off, due to the presence of bearing 27, the cable protection pipe 22 of later section bushing type electric heater
And plug-in type leader cable 21 is not rotated with the rotation of sleeve body 14, waits for that two adjacent sections bushing type electric heater connects
Afterwards, by the electric heating wire high pressure sealing pin end 23 of later section bushing type electric heater and electric heating wire high pressure sealing female connector 19
It links together, completes to connect between bushing type electric heater.
During step 3 installs sheath tube heater power supply pipeline 13, bushing type is added by cable connection joint
Hot device power supply pipeline 13 is connect with the plug-in type leader cable 21 of final section.
In 5 course of work of sheath tube heater described in step 5, the electrical heating between two adjacent sections sheath tube heater
18 connection types of silk are parallel connection, and supply voltage is high-voltage electricity, and voltage is 1000V~3000V, can be whole according to supply voltage is adjusted
Adjust the heating power of each section sheath tube heater 5.The gas yield or well inner fiber temperature sensor monitored according to well head
10 horizontal wells 4 monitored exploit temperature in well section, carry out adjusting or the unlatching/closing of heating power, realize decompression heating coupling
Close exploitation of gas hydrate.
Embodiment two
As shown in figure 3, second of bushing type electric heater, which includes sleeve body 14, electrical heating
There is screw thread, adjacent two section sleeve bodies 14 to use screw thread between each other for the end of silk system and screen casing 15, sleeve body 14
It is attached, electric heating wire double spiral groove 16 is machined in sleeve body 14 and crosses water helicla flute 17, electric heating wire double helix
The groove width of slot 16 is 2mm~4mm, and slot pitch is 2mm~4mm, and screw pitch is 30mm~40mm；The groove width for crossing water helicla flute 17 is 1mm
The screw pitch of~3mm, excessively water helicla flute 17 are consistent with the screw pitch of electric heating wire double spiral groove 16, and water helicla flute 17 is inclined excessively sets
It sets, is 60 degree with the axial angle of sleeve body 14, crosses water helicla flute 17 and 16 arranged for interval of electric heating wire double spiral groove；
Electric heating wire system includes electric heating wire 18 and high pressure sealing joint 28,18 a diameter of 2mm~4mm of electric heating wire, with double helix
Mode be wrapped in electric heating wire double spiral groove 16, electric heating wire 18 is dynamic by high pressure sealing joint 28 and sheath tube heater
Power supply pipeline 13 is connected；The outer diameter of the screen casing 15 is consistent with the maximum outside diameter of sleeve body 14, to keep entire bushing type
Electric heater outer diameter is consistent, and the screen-aperture on 15 side wall of screen casing is set according to 3 sediment grain size of gas hydrates reservoir
Meter.13 diameter of sheath tube heater power supply pipeline is about 5mm, and deep water is connected to along the outer wall of sleeve body 14
Drilling platforms 6.
The present embodiment middle sleeve formula heater 5 uses second of bushing type electric heater：
During decentralization sheath tube heater 5 described in step 2, the sleeve body of two adjacent sections bushing type electric heater
14 are connected through a screw thread, and sheath tube heater power supply pipeline 13 is fixed on set after the two section threaded connections of sleeve bodies 14
On 14 outer wall of tube body, complete to connect between bushing type electric heater.In the present embodiment, sheath tube heater power supply pipe
Line 13 is transferred simultaneously with casing, and sheath tube heater power supply pipeline 13 is located at ordinary casing 7 and bushing type electric heater
Outside.
In 5 course of work of sheath tube heater described in step 5, the electrical heating between the bushing type electric heater
Independently of one another, each bushing type electric heater supply voltage that saves is high-voltage electricity to silk 18, and voltage is 1000V~3000V, can be according to adjusting
Supply voltage individually adjusts the heating power for often saving bushing type electric heater.Light in the gas yield or well monitored according to well head
The horizontal well 4 that fine temperature sensor 10 monitors exploits temperature in well section, carries out the tune of each section 5 heating power of sheath tube heater
Decompression heating coupling exploitation of gas hydrate is realized in section or unlatching/closing.
Embodiment three
As shown in figure 4, described sleeve pipe formula fluid heater includes sleeve body 14, screen casing 15 and high temperature fluid pipeline, set
The end of tube body 14 has screw thread, and adjacent two section sleeve bodies 14 are attached using screw thread between each other, in casing sheet
Water helicla flute 17 was machined on body 14, the groove width for crossing water helicla flute 17 is 1mm~3mm, and screw pitch is 30mm~40mm, crosses water spiral shell
Spin slot 17 is inclined to set, and is 60 degree with the axial angle of sleeve body 14, arbitrary neighborhood two crosses water helicla flute 17 etc.
Arranged for interval；Screen casing 15 is sleeved in sleeve body 14, and the outer diameter of screen casing 15 is consistent with the maximum outside diameter of sleeve body 14, to keep
Entire bushing type fluid heater outer diameter is consistent；Screen-aperture on 15 side wall of screen casing is deposited according to gas hydrates reservoir 3
Object grain size is designed；High temperature fluid pipeline includes being provided with into fluid hose 30 and reflux pipe 31 into one end of fluid hose 30
Into fluid hose pin end 32, the other end is provided with into fluid hose female connector 33, and one end of reflux pipe 31 is provided with reflux pipe
Female connector 34, the other end are provided with reflux pipe pin end 35, the internal diameter into fluid hose 30 and reflux pipe 31 be 2cm~
4cm, two high temperature fluid pipeline Spiral distributions contact in sleeve body 14, and with 14 inner wall of sleeve body.
The present embodiment middle sleeve formula heater 5 uses bushing type fluid heater：
During decentralization sheath tube heater 5 described in step 2, connect in two adjacent sections bushing type fluid heater screw thread
Before connecing, first by previous section bushing type fluid heater into fluid hose pin end 32 and later section bushing type fluid heater
It is connected into fluid hose female connector 33, the reflux pipe female connector 34 and later section bushing type stream of previous section bushing type fluid heater
The reflux pipe pin end 35 of body heater is connected；Then 14 screw thread of sleeve body for carrying out two section bushing type fluid heaters connects
It connects.
In 5 course of work of sheath tube heater described in step 5, the high temperature fluid of the bushing type fluid heater
Pipeline connection type is series connection, can be according to the integrally-regulated each section bushing type fluid heater of the temperature and flow that adjust hot fluid
Heating power.4 recovery well of horizontal well that the gas yield or well inner fiber temperature sensor 10 monitored according to well head monitors
Temperature in section carries out adjusting or the unlatching/closing of bushing type fluid heater heats power, realizes decompression heating coupling exploitation day
Right gas hydrate.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiment of the present invention for those of ordinary skill in the art on the basis of the above description can be with
It makes other variations or changes in different ways, all embodiments can not be exhaustive here, it is every to belong to the present invention
Technical solution changes and variations that derived from still in protection scope of the present invention row.
Claims (10)
1. a kind of method using sheath tube heater exploitation of gas hydrate, which is characterized in that include the following steps：
Step 1: calmodulin binding domain CaM geologic information and gas hydrates reservoir (3) Sediment Characteristics, in gas hydrates reservoir
(3) interior design level well (4) arrangement；
Step 2: drilling well and completion, recovery well drilling is carried out using deepwater drilling platform (6), in gas hydrates when completion
Reservoir (3) intends production range decentralization sheath tube heater (5), other intervals transfer ordinary casing (7), install wellhead assembly (8),
Wellhead assembly (8) is connect by marine riser (9) with deepwater drilling platform (6), well cementation；
Step 3: installation fibre optic temperature sensor (10), immersible pump (11), submersible pump cable (12) and set in exploitation well shaft
Tube heater power supply pipeline (13), submersible pump cable (12) one end are connect with immersible pump (11), and the other end is bored with deep water
Well platform (6) connects, and sheath tube heater power supply pipeline (13) one end connect with sheath tube heater (5), the other end and
Deepwater drilling platform (6) connects；
Step 4: starting immersible pump (11), horizontal well (4) interior pressure is gradually reduced, decompression exploitation is carried out；
Step 5: when the lasting reduction of temperature appearance or gas production rate are less than the 10% of normal value in exploitation well shaft, casing is opened
Formula heater (5), adjusting set tube heater (5) heating power makes aerogenesis after temperature in pit shaft or gas production rate restore normal
Amount keeps stablizing, and gas production holding may be selected to close sheath tube heater (5) after stablizing 1 hour, and so on adjusting set tubular type
Heater (5) heating power or unlatching/closing sheath tube heater (5) realize decompression heating coupling exploitation of gas hydrate.
2. a kind of method using sheath tube heater exploitation of gas hydrate according to claim 1, feature exist
In：Described sleeve pipe formula heater (5) is bushing type electric heater or bushing type fluid heater.
3. a kind of method using sheath tube heater exploitation of gas hydrate according to claim 2, feature exist
In：Described sleeve pipe formula electric heater includes sleeve body (14), electric heating wire system, screen casing (15) and plug-in type leader cable system
There is screw thread, adjacent two section sleeve bodies (14) to be attached between each other using screw thread for the end of system, sleeve body (14),
It is machined with electric heating wire double spiral groove (16) in sleeve body (14) and crosses water helicla flute (17), electric heating wire double spiral groove
(16) groove width is 2mm~4mm, and slot pitch is 2mm~4mm, and screw pitch is 30mm~40mm；The groove width for crossing water helicla flute (17) is
1mm~3mm, the screw pitch for crossing water helicla flute (17) is consistent with the screw pitch of electric heating wire double spiral groove (16), crosses water helicla flute (17)
It is inclined to set, is 60 degree with the axial angle of sleeve body (14), crosses water helicla flute (17) and electric heating wire double helix
Slot (16) arranged for interval；Electric heating wire system includes electric heating wire (18) and electric heating wire high pressure sealing female connector (19), and electricity adds
Heated filament (18) a diameter of 2mm~4mm is wrapped in electric heating wire double spiral groove (16), electric heating wire in a manner of double helix
(18) through-hole (20) in sleeve body (14) is passed through to be connected with electric heating wire high pressure sealing female connector (19)；Electric heating wire high pressure
Sealing female connector (19) is fixed on sleeve body (14) inner wall；Screen casing (15) is sleeved in sleeve body (14), is covered electricity and is added
The outer diameter of heated filament (18), screen casing (15) is consistent with the maximum outside diameter of sleeve body (14), to keep entire bushing type electric heater
Outer diameter is consistent；Plug-in type leader cable system is public by plug-in type leader cable (21), cable protection pipe (22), electric heating wire high pressure sealing
Connector (23), leader cable high pressure sealing pin end (24), leader cable high pressure sealing female connector (25) and cable protection tube fixing device
(26) it constitutes, plug-in type leader cable (21) is placed in cable protection pipe (22)；Cable protection pipe (22) one end is protected by cable
Pillar fixed frame (26) is fixed on sleeve body (14) inner wall, and cable protection pipe (22) other end passes through the high densification of electric heating wire
Envelope pin end (23) with electric heating wire high pressure sealing female connector (19) is mating is fixed on sleeve body (14) inner wall；Main electricity
Cable high pressure sealing pin end (24), leader cable high pressure sealing female connector (25) are separately positioned on plug-in type leader cable (21) both ends end
Portion, it is external that leader cable high pressure sealing pin end (24) extends to cable protection pipe (22)；Cable protection tube fixing device (26) and electricity
Bearing (27) is provided between cable protection pipe (22).
4. a kind of method using sheath tube heater exploitation of gas hydrate according to claim 3, feature exist
In：It is as follows to transfer bushing type electric heater process：Before two adjacent sections bushing type electric heater is threadedly coupled, first by previous section
The leader cable high pressure sealing pin end (24) of bushing type electric heater and the high densification of leader cable of later section bushing type electric heater
It seals female connector (25) to be connected, the mode being then connected through a screw thread connects the sleeve body (14) of two section bushing type electric heaters
It connects, the electric heating wire high pressure sealing pin end (23) of later section bushing type electric heater connects with electric heating wire high pressure sealing mother at this time
Head (19) is off, after two adjacent sections bushing type electric heater connects, by later section bushing type electric heater
Electric heating wire high pressure sealing pin end (23) and electric heating wire high pressure sealing female connector (19) link together, and complete bushing type electricity
It is connected between heater.
5. a kind of method using sheath tube heater exploitation of gas hydrate according to claim 2, feature exist
In：Described sleeve pipe formula electric heater includes sleeve body (14), electric heating wire system and screen casing (15), the end of sleeve body (14)
There is screw thread, adjacent two section sleeve bodies (14) to be attached using screw thread, be added in sleeve body (14) between each other in portion
Work has electric heating wire double spiral groove (16) and crosses water helicla flute (17), the groove width of electric heating wire double spiral groove (16) be 2mm~
4mm, slot pitch are 2mm~4mm, and screw pitch is 30mm~40mm；The groove width for crossing water helicla flute (17) is 1mm~3mm, crosses water helicla flute
(17) screw pitch is consistent with the screw pitch of electric heating wire double spiral groove (16), crosses water helicla flute (17) and is inclined to set, with casing
Ontology (14) axial direction angle is 60 degree, crosses water helicla flute (17) and electric heating wire double spiral groove (16) arranged for interval；Electricity adds
Heated filament system includes electric heating wire (18) and high pressure sealing joint (28), electric heating wire (18) a diameter of 2mm~4mm, with double spiral shells
The mode of rotation is wrapped in electric heating wire double spiral groove (16), and electric heating wire (18) passes through high pressure sealing joint (28) and bushing type
Heater power supply pipeline (13) is connected；The outer diameter of the screen casing (15) is consistent with the maximum outside diameter of sleeve body (14), with
Keep entire bushing type electric heater outer diameter consistent.
6. a kind of method using sheath tube heater exploitation of gas hydrate according to claim 5, feature exist
In：It is as follows to transfer bushing type electric heater process：The sleeve body (14) of two adjacent sections bushing type electric heater is connected by screw thread
It connects, sheath tube heater power supply pipeline (13) is fixed on sleeve body after two section sleeve bodies (14) threaded connections
(14) it on outer wall, completes to connect between bushing type electric heater.
7. a kind of side using sheath tube heater exploitation of gas hydrate according to any one of claim 3-6
Method, it is characterised in that：The electric heating wire (18) is metallic resistance silk or carbon fiber heating silk.
8. a kind of method using sheath tube heater exploitation of gas hydrate according to claim 2, feature exist
In：Described sleeve pipe formula fluid heater includes sleeve body (14), screen casing (15) and high temperature fluid pipeline, sleeve body (14)
End has screw thread, and adjacent two section sleeve bodies (14) are attached using screw thread between each other, in sleeve body (14)
It was machined with water helicla flute (17), the groove width for crossing water helicla flute (17) is 1mm~3mm, and screw pitch is 30mm~40mm, crosses water spiral
Slot (17) is inclined to set, and is 60 degree with the axial angle of sleeve body (14), arbitrary neighborhood two crosses water helicla flute
(17) it is equidistantly spaced from；Screen casing (15) is sleeved in sleeve body (14), the maximum of the outer diameter and sleeve body (14) of screen casing (15)
Outer diameter is consistent, to keep entire bushing type fluid heater outer diameter consistent；High temperature fluid pipeline includes into fluid hose (30) and returning
Fluid hose (31) is provided with into one end of fluid hose (30) into fluid hose pin end (32), and the other end is provided with into fluid hose mother
One end of connector (33), reflux pipe (31) is provided with reflux pipe female connector (34), and the other end is provided with reflux pipe public access
Head (35), the internal diameter into fluid hose (30) and reflux pipe (31) is 2cm~4cm, two high temperature fluid pipeline Spiral distributions
In sleeve body (14), and contacted with sleeve body (14) inner wall.
9. a kind of method using sheath tube heater exploitation of gas hydrate according to claim 8, feature exist
In：It is as follows to transfer bushing type fluid heater process：Two adjacent sections bushing type fluid heater threaded connection before, first will before
Casing joint formula fluid heater into fluid hose pin end (32) and later section bushing type fluid heater into fluid hose mother
Connector (33) is connected, and the reflux pipe female connector (34) of previous section bushing type fluid heater is heated with later section bushing type fluid
The reflux pipe pin end (35) of device is connected；Then sleeve body (14) screw thread for carrying out two section bushing type fluid heaters connects
It connects.
10. a kind of method using sheath tube heater exploitation of gas hydrate according to claim 2, feature exist
In：The supply voltage of described sleeve pipe formula electric heater is 1000V~3000V.
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| CN201810345979.4A CN108505977B (en) | 2018-04-18 | 2018-04-18 | Method for exploiting natural gas hydrate by using sleeve type heater |
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| CN201810345979.4A CN108505977B (en) | 2018-04-18 | 2018-04-18 | Method for exploiting natural gas hydrate by using sleeve type heater |
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| CN109577924A (en) * | 2019-01-25 | 2019-04-05 | 大连理工大学 | A method of based on memory alloy material exploiting ocean shallow layer gas hydrate |
| CN109915084A (en) * | 2019-04-09 | 2019-06-21 | 中国石油大学(北京) | Deep water exploitation of gas hydrates system and deep water gas hydrate mining methods |
| CN110056332A (en) * | 2019-04-11 | 2019-07-26 | 大连理工大学 | A kind of the sea bed gas hydrate quarrying apparatus and method of control production rate |
| CN111076094A (en) * | 2019-12-24 | 2020-04-28 | 中国科学院广州能源研究所 | System for monitoring and avoiding secondary generation in hydrate decomposition process |
| CN111119798A (en) * | 2019-11-15 | 2020-05-08 | 东北石油大学 | Natural gas hydrate slurry mining device |
| WO2020206878A1 (en) * | 2019-04-08 | 2020-10-15 | 中国石油大学(华东) | Device and working method for drilling hydrate micro-borehole and rapidly performing well completion |
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