CN109488270A - A kind of system and method for two-way horizontal well hot fume sealing and circulating exploitation oil-sand - Google Patents
A kind of system and method for two-way horizontal well hot fume sealing and circulating exploitation oil-sand Download PDFInfo
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- CN109488270A CN109488270A CN201910017826.1A CN201910017826A CN109488270A CN 109488270 A CN109488270 A CN 109488270A CN 201910017826 A CN201910017826 A CN 201910017826A CN 109488270 A CN109488270 A CN 109488270A
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- sand
- oil
- way horizontal
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- hot fume
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
- E21B43/38—Arrangements for separating materials produced by the well in the well
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/22—Rods or pipes with helical structure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/14—Drilling by use of heat, e.g. flame drilling
Abstract
The invention discloses a kind of system and methods of two-way horizontal well hot fume sealing and circulating exploitation oil-sand, the system includes oil-sand exploitation backfilling unit and gas circulation unit composition, the oil-sand exploitation backfilling unit includes being set to the rotation pyrolysis oven on ground and the two-way horizontal twist bit under main tunnel, two-way horizontal well new method is added using main tunnel, by oil-sand mine airtight heating, softening, it drills through, fluidisation, conveying, destructive distillation, separation obtains empyreumatic oil, cold oil, combustible gas etc., the condensed water and tailings isolated are recycled into well and carry out in situ bury, the stripping amount of adopting that the system and method can efficiently solve conventional oil sand exploitation is big, energy consumption is high, low efficiency, it is at high cost, security risk is high, soil fail and the problems such as environmental pollution is serious, with good application prospect with economic and environment-friendly value.
Description
Technical field
The present invention designs oil-sand exploitation and environment protection field more particularly to a kind of exploitation of two-way horizontal well hot fume sealing and circulating
The system and method for oil-sand.
Background technique
With being continuously increased for global demand of petroleum, conventional oil resource is no longer satisfied the quick increasing of oil demand
Long, people start sight to turn to non-conventional oil resource.Main source of the oil-sand as non-conventional oil resource, exists in recent years
Shared ratio constantly increases in the available hydro carbons energy in the whole world, and very important effect is played in world's energy resource supply,
It is the important making & breaking of the following petroleum resources.Oil-sand, which refers to, have been exposed or the sandstone of the heavy residual oil-impregnation of near surface,
Asphalt-base crude oil loses the product after light components, sometimes referred to as one after the evolution of dipping light fraction part in migration process
The sand or sandstone of kind natural oil, can be used to extract heavy oil or pitch.
Currently, more and more companies, scientific research institutions begin to focus on the comprehensive utilization of oil-sand, exploration to oil-sand resource and
Development technique carries out particular study work, but the aggregate level of China's oil-sand development and utilization still relatively lags behind, relevant
The technical research of oil-sand separation is also fewer, and without special oil-sand separation industrialized unit.Oil sand separation technology is main
There are three types of: hot water wash method, solvent extraction, pyrogenation and carbonization method.Wherein, pyrogenation and carbonization method refers in isolation air or full of inertia
Under conditions of gas, using the method directly or indirectly heated, make the complicated reaction of pretreated oil-sand heat resolve
Journey, oil-sand generate carbonization gas and solid residue after pyrogenation and carbonization, and carbonization gas obtains gas and liquid after cooling, and pyrolysis is dry
Method is evaporated by energy recycling system, reduces overall energy consumption, and the principle based on thermal desorption, oil-sand is in anoxic and closed sky
Between in by indirect heating, come out water and volatile hydrocarbons, contained hydrocarbons are all pyrolyzed realization inertia in oil-sand
Change, separates relatively thorough.
Existing oil-sand mine all standing tunnel excavates exploitation and carbonization method is primarily present following problems: oil-sand mine and its
All workloads are big, energy consumption is big, at high cost, security risk is high for mechanical excavation, transport, backfill etc. for upper caldding layer, cap rock and interlayer,
Soil vegetative cover destroys and environmental pollution is serious；The hot fume direct emission that oil-sand mine carbonization furnace generates, ingredient and waste heat
There is no abundant resource recycling to utilize, not only the thermal efficiency is low, but also pollutes environment.
Summary of the invention
The technical problem to be solved by the present invention is to excavate above-mentioned existing for exploitation and carbonization decomposition ask for current oil-sand
Topic provides a kind of system and method for two-way horizontal well hot fume sealing and circulating exploitation oil-sand, solves currently employed all standing hole
It excavates during exploitation and carbonization decomposition to exist and exploit and backfill workload is big, energy consumption is big, low efficiency, security risk are high, remaining in road
The problem of heat can not reuse, soil vegetative cover destroys and environmental pollution is serious.
The present invention is achieved through the following technical solutions:
A kind of system of two-way horizontal well hot fume sealing and circulating exploitation oil-sand, including oil-sand exploit backfilling unit, described
Oil-sand exploitation backfilling unit includes being set to the rotation pyrolysis oven on ground and the two-way horizontal twist bit under main tunnel, described
Rotating pyrolysis oven includes reacting furnace, sediment outflow furnace, product furnace and oil extraction furnace, and two-way horizontal twist bit two sides are also connected with respectively
There are mine drilling bit and backfill drill bit, be equipped with sand-feeding tube road between the rotation pyrolysis oven mine drilling bit, is set between backfill drill bit
There are sediment outflow pipeline, the connection in the sand-feeding tube road and reacting furnace feed inlet, the sediment outflow pipeline is connected to sediment outflow furnace discharge mouth, institute
Reacting furnace is stated for carbonization oil-sand, the sediment outflow furnace is for being discharged tailings, and the product furnace is for after receiving carbonization
Pyrolysis gas, the oil extraction furnace is for being discharged empyreumatic oil.
According to pay sand thickness, buried depth and stability, the mode for choosing safety economy carries out the excavation in main tunnel, rotation heat
Solution furnace is placed in by main tunnel, and two-way horizontal twist bit is placed under main tunnel, and the mine drilling bit of two-way horizontal twist bit pierces
Oil-sand mine drills out oil-sand by sand-feeding tube road and is delivered to rotation pyrolysis oven carbonization, resolves into empyreumatic oil, pyrolysis gas and tail
Sand；Tailings is discharged through sediment outflow pipeline, and the backfill drill bit of two-way horizontal twist bit exits, and carrying tailings, which is backfilling into, in time has recovered the oil
Sand abandoned well, after two-way horizontal twist bit completes tailing backfill, then by main tunnel all backfill restore completely underground, hole and
Bottom surface ecological environment.
Further, as optimal technical scheme, a kind of two-way horizontal well hot fume sealing and circulating exploits oil-sand
System, further include gas circulation unit, the gas circulation unit includes the first pipe being connected to reacting furnace gas outlet, with
The air jet mixer of reacting furnace air inlet connection, the condensation separator being connected to product outlet of still, the air injection are mixed
Clutch is equipped with third pipeline, and the water outlet of the condensation separator is connected to sediment outflow pipeline by the 6th pipeline, the condensation point
Gas outlet from device is connected to air jet mixer by the 5th pipeline.
Hot fume pipeline one end with rotation pyrolysis oven reacting furnace gas outlet it is closed be connected to, for hot fume to be discharged,
Condensation separator by second pipe with rotate pyrolysis oven product outlet of still it is closed be connected to, for convey pyrolysis gas to condensation divide
From device, it is separated into cold oil, combustible gas and condensed water, the condensation separator is equipped with the 6th pipeline and connect with sediment outflow pipeline,
Air jet mixer is connected to by the 5th pipeline with condensation separator gas outlet, and air jet mixer is additionally provided with third pipe
Road, air jet mixer are connected to by the 4th pipeline with reacting furnace air inlet.
Further, as optimal technical scheme, the first pipe passes through sand-feeding tube far from one end of rotation pyrolysis oven
Road extends in mine drilling bit drilling rod.
Further, as optimal technical scheme, the oil-sand exploitation backfilling unit further includes oil-sand caching degassing tank, institute
It states and is equipped with the 8th pipeline at the top of oil-sand caching degassing tank, the discharge port of the oil-sand caching degassing tank and the feed inlet of reacting furnace connect
Logical, the feed inlet of oil-sand caching degassing tank is connected to sand-feeding tube road.
Further, as optimal technical scheme, the two-way horizontal twist bit horizontal rotation angle range is in 0-
360 °, the mine drilling bit and backfill drill bit tilt adjustment range at 0-45 °.
A kind of method of two-way horizontal well hot fume sealing and circulating exploitation oil-sand, which comprises the following steps:
S1: main tunnel is excavated；According to pay sand thickness, buried depth and stability, the mode for choosing safety economy carries out main hole
The excavation in road；
S2: two-way horizontal twist bit is placed in main tunnel, and the mine drilling bit of two-way horizontal twist bit rotates forward, extraction oil
Sand；
S3: the oil-sand of mine drilling bit extraction is delivered to rotation pyrolysis oven through sand-feeding tube road；
S4: rotation pyrolysis oven is set to ground, and oil-sand is carried out carbonization, obtains pyrolysis gas and tailings；
S5: tailings is backfilled to underground through sediment outflow pipeline by the backfill drill bit reversion of two-way horizontal twist bit.
Further, further include step S6 as optimal technical scheme: pyrolysis gas is delivered to condensation separator, obtain
Condensed water, cold oil and combustible gas.
Further, further include step S7 as optimal technical scheme: condensed water is delivered to sediment outflow pipeline and tailings
It is backfilled to underground together.
Further, further include step S8 as optimal technical scheme: being delivered to rotation after combustible gas is mixed with air
Pyrolysis oven is thermally formed hot fume, and hot fume is inputted in mine drilling bit drilling rod.
Further, further include step S9 as optimal technical scheme: the oil-sand fallen will be bored and hot fume mixture conveys
It deaerates to oil-sand caching degassing tank, then is delivered to rotation pyrolysis oven and continues to heat.Oil-sand temperature increases around mine drilling bit, crude oil
Viscosity reduces fluidisation, and the drillability and mobility of pay sand improve, bore the oil-sand fallen and hot fume through sand-feeding tube road and be delivered to oil
Sand caches degassing tank degassing, and oil-sand caching degassing tank takes off nitrogen, carbon dioxide and vapor etc., and discharge meets environmental requirement
Cold flue gas, oil-sand continue to heat through the 7th pipeline to rotation pyrolysis oven again.
According to pay sand thickness, buried depth and stability, the mode for choosing safety economy carries out the excavation in main tunnel, rotation heat
Solution furnace is placed in main tunnel side, and two-way horizontal auger is placed under main tunnel, and two-way horizontal twist bit one is bored to driving exploitation
Head pierces oil-sand mine, drills out oil-sand by sand-feeding tube road and is delivered to rotation pyrolysis oven carbonization, resolves into empyreumatic oil, pyrolysis gas
And tailings；Pyrolysis gas isolates condensed water, cold oil and combustible gas by first pipe closed conveying to condensation separator, cold
For condensate through the 6th pipeline to sediment outflow pipeline, combustible gas is outer to pass through for combustion gas through the 5th pipeline to air jet mixer
Third pipeline to air jet mixer, air jet mixer by combustible gas, it is outer for combustion gas and air mixed injecting extremely
Rotation pyrolysis stove heating, forms hot fume, hot fume is again through first pipe closed conveying to mine drilling bit, and tailings is through sediment outflow pipeline
Discharge, two-way horizontal twist bit is another to be exited to driving backfill drill bit, is carried tailings in time and is backfilling into oil recovery sand abandoned well,
After two-way horizontal twist bit completes tailing backfill, then all backfill restores underground, hole and bottom surface ecology completely by main tunnel
Environment.
Oil-sand resolves into empyreumatic oil, pyrolysis gas and tailings, pyrolysis gas passes through first pipe through rotating pyrolysis oven carbonization
Closed conveying isolates condensed water, cold oil and combustible gas, condensed water is through the 6th pipeline to drain pipe to condensation separator
Road, combustible gas are mixed through the 5th pipeline to air jet mixer, outer spray for combustion gas through third pipeline to air
Combustible gas, outer extremely rotate for combustion gas and air mixed injecting are pyrolyzed stove heating, form hot fume by device, air jet mixer,
In drilling rod of the hot fume again through first pipe closed conveying to mine drilling bit, heat can be discharged according to pyrolysis oven in air jet mixer
Pressure, temperature and the flow of flue gas automatically adjust whiff pressure, mixed proportion and gas flow.
Further, as optimal technical scheme, a kind of two-way horizontal well hot fume sealing and circulating exploits oil-sand
Method, hot fume after first pipe is delivered to mine drilling bit, around mine drilling bit oil-sand temperature increase, viscosity of crude reduce
Fluidisation, the drillability and mobility of pay sand improve, and boring the oil-sand fallen and hot fume, through sand-feeding tube road to be delivered to oil-sand caching de-
Gas tank degassing, oil-sand caching degassing tank take off nitrogen, carbon dioxide and vapor etc., and discharge meets the cold flue gas of environmental requirement,
Oil-sand continues to heat through the 7th pipeline to rotation pyrolysis oven again.
Compared with the prior art, have the advantages that is the present invention:
(1), hot fume sealing and circulating comprehensively utilizes: the hot fume that rotation pyrolysis oven generates is closed by hollow screw drilling rod
It is recycled into drill bit, annular space, then to oil-sand buffering degassing tank purification degassing, it is the ingenious thermal energy for realizing hot fume, chemical energy, swollen
The efficient of ingredients such as swollen energy and nitrogen, carbon dioxide, vapor, the closed comprehensive utilization of energy-saving and environmental protection and cold flue gas are purified
Cleaning discharge.
(2), oil-sand sealing and circulating backfills in situ entirely: two-way horizontal twist bit one is to the oil-sand drilled out, by rotation heat
Solve furnace carbonization, resolve into empyreumatic oil, pyrolysis gas and tailings, pyrolysis gas is closed to enter condensation separator, be separated into combustible gas,
Condensed water and cold oil, two-way horizontal twist bit is another to exiting, and carries tailings in time and condensed water mixing is backfilling into and has opened
The discarded old well adopted cleverly realizes the efficient of empyreumatic oil, cold oil and combustible gas, energy-saving and environmental protection development and utilization and tailings
It is balanced with the original position of condensed water, is safe and environment-friendly, permanently buried.
(3), improve oil-sand production efficiency and benefit: the present invention adds two-way horizontal using hot fume sealing and circulating and main tunnel
Well innovative approach, by oil-sand mine airtight heating, soften, drill through, fluidize, convey, carbonization, separation obtain empyreumatic oil, condensation
Oil, combustible gas, the condensed water and tailings isolated are recycled into well and carry out in situ bury.The present invention can efficiently solve conventional oil sand and open
The difficulty that the stripping amount of adopting adopted is big, energy consumption is big, low efficiency, at high cost, security risk is high, soil vegetative cover destroys and environmental pollution is serious
Topic, has a good application prospect and economic and environment-friendly value.
Detailed description of the invention
Fig. 1 is system structure diagram of the invention；
Fig. 2 is workflow schematic diagram of the invention.
Label and corresponding parts title in attached drawing: 1- first pipe, 2- second pipe, 3- third pipeline, 4- the 4th
Pipeline, the 5th pipeline of 5-, the 6th pipeline of 6-, the 7th pipeline of 7-, the 8th pipeline of 8-, 9- rotation pyrolysis oven, the caching degassing of 10- oil-sand
Tank, 11- sand-feeding tube road, the main tunnel 12-, 13- two-way horizontal twist bit, 14- mine drilling bit, 15- sediment outflow pipeline, 16- condensation
Separator, 17- air jet mixer, 18- sediment outflow furnace, 19- reacting furnace, 20- oil extraction furnace, 21- product furnace, 22- backfill drill bit
Specific embodiment
Below with reference to examples and drawings, the present invention is described in further detail, but embodiments of the present invention are not
It is limited to this.
Embodiment 1
As shown in Figure 1, a kind of system of two-way horizontal well hot fume sealing and circulating exploitation oil-sand, including oil-sand exploitation backfill
Unit, the oil-sand exploitation backfilling unit include being set to the rotation pyrolysis oven 9 on ground and the two-way horizontal under main tunnel 12
Twist bit 13, the rotation pyrolysis oven 9 is interior including reacting furnace 19, sediment outflow furnace 18, product furnace 21 and oil extraction furnace 20, described two-way
Mine drilling bit 14 and backfill drill bit 22 is also respectively connected in 13 two sides of horizontal spiral drilling machine, and the rotation pyrolysis oven 9 is bored with exploitation
It is equipped with sand-feeding tube road 11 between first 14, is equipped with sediment outflow pipeline 15, the sand-feeding tube road 11 and reacting furnace between backfill drill bit 22
The connection of 19 feed inlets, the sediment outflow pipeline 15 are connected to 18 discharge port of sediment outflow furnace.
According to pay sand thickness, buried depth and stability, the safety such as shield machine mine working or the outdoor excavation of excavator is chosen
Economic mode carries out the excavation in main tunnel 12, and thickness is big, buries the pay sand of depth and stability difference, chooses shield machine underground and digs
Dig main tunnel 12；Thickness is thin, buries shallow and good stability pay sand, chooses the outdoor main tunnel of excavation of excavator, main tunnel 12
After excavating well, rotation pyrolysis oven 9 is placed in by main tunnel 12, two-way horizontal twist bit 13 is placed in main tunnel,
13 machine two sides of two-way horizontal auger have been separately connected mine drilling bit 14 and backfill drill bit 22,11 one end of sand-feeding tube road and rotation heat
It solves furnace 9 to connect, the other end is connect with 14 tail portion of mine drilling bit, and 15 one end of sediment outflow pipeline is connect with rotation pyrolysis oven 9, the other end
Backfill 22 tail portion of drill bit connection, two-way horizontal twist bit 13 drive mine drilling bit 14 pierce oil-sand mine, the oil-sand drilled out pass through into
Sand pipeline 11 is delivered to rotation 9 carbonization of pyrolysis oven, resolves into empyreumatic oil, pyrolysis gas and tailings；Empyreumatic oil is through oil extraction furnace 20
Outlet direct emission in main tunnel 12, tailings through sediment outflow pipeline 15 be discharged, two-way horizontal rotary rig 13 driving backfill bore
First 22 exit, and carry tailings in time and are backfilling into oil recovery sand abandoned well；It, will after two-way horizontal twist bit 13 completes tailing backfill
All backfill restores underground, hole and bottom surface ecological environment completely in main tunnel 12, and safe and environment-friendly, permanent backfill is buried.
Embodiment 2
On the basis of embodiment 1, the system of a kind of two-way horizontal well hot fume sealing and circulating exploitation oil-sand, also
Including gas circulation unit, the gas circulation unit includes the first pipe 1 being connected to 19 gas outlet of reacting furnace, with reacting furnace
The air jet mixer 17 of 19 air inlets connection, the condensation separator 16 with 21 outlet of product furnace, the air injection
Mixer 17 is equipped with third pipeline 3, and the water outlet of the condensation separator 16 is connected to sediment outflow pipeline 15, the condensation separator
16 gas outlet is connected to air jet mixer 17.
Described 1 one end of first pipe with the gas outlet of reacting furnace 19 is closed is connected to, for hot fume, condensation separator to be discharged
16 by second pipe 2 with the outlet of product furnace 21 is closed is connected to, separated for conveying pyrolysis gas to condensation separator 16,
It is separated into cold oil, combustible gas and condensed water, condensation separator is equipped with the 6th pipeline 6 and connect with sediment outflow pipeline 15, and being used for will be cold
Condensate mixing tailings is discharged together, is backfilled to abandoned well, and air jet mixer 17 passes through the 5th pipeline 5 and condensation separator 16
Gas outlet connection, for combustible gas to be delivered to air jet mixer 17, air jet mixer 17 is additionally provided with third pipe
Road 3, for the outer conveying for combustion gas, air jet mixer 17 is connected to by the 4th pipeline 4 with 19 air inlet of reacting furnace, outer confession
Combustion gas, combustible gas and air, which are delivered to reacting furnace 19 through the 4th pipeline 4, to be continued to heat, cleverly realize combustible gas it is efficient,
Energy-saving and environmental protection development and utilization, reduce outer supply and tailings for combustion gas and the in situ of condensed water balances.
Embodiment 3
On the basis of embodiment 2, the first pipe 1 passes through sand-feeding tube road 11 far from one end of rotation pyrolysis oven 9 and prolongs
It extends in 14 drilling rod of mine drilling bit, hot fume is delivered in mine drilling bit 14 through first pipe 1, so that surrounding oil-sand temperature liter
Height, viscosity of crude reduce fluidisation, and the drillability and mobility of pay sand improve, and are more advantageous to the exploitation of oil-sand, effective to recycle
Using the thermal energy of hot fume, production efficiency is improved.
Embodiment 4
On the basis of embodiment 3, the oil-sand exploitation backfilling unit further includes oil-sand caching degassing tank 10, the oil-sand
It caches and is equipped with the 8th pipeline at the top of degassing tank, the discharge port of the oil-sand caching degassing tank 10 and the feed inlet of reacting furnace 19 connect
Logical, the feed inlet of oil-sand caching degassing tank 10 is connected to sand-feeding tube road 11.
Oil-sand caching degassing tank 10 is placed in rotation 9 side of pyrolysis oven, and passes through the feed inlet of the 7th pipeline 7 and reacting furnace 9
Connection, 11 one end of sand-feeding tube road are connected to the feed inlet of oil-sand caching degassing tank 10, and oil-sand caching degassing tank 10, which is additionally provided with, to be used for
The 8th pipeline 8 of cold flue gas is discharged, bores the oil-sand fallen and hot fume is blended in hollow screw drilling rod 14 and the promotion of gas is lifted
Under rising, it is flow to the caching purification degassing of degassing tank 10 through sand-feeding tube road 11, takes off nitrogen, carbon dioxide and vapor, discharge symbol
The cold flue gas of cyclization guaranteed request, the oil-sand of degassing are delivered to reacting furnace 19 through the 7th pipeline 7 and continue carbonization.
Embodiment 5
On the basis of embodiment 4, a kind of system of two-way horizontal well hot fume sealing and circulating exploitation oil-sand is double
To 13 machine level of horizontal screw drilling, 3 rotation angle range at 0-360 °, the inclination angle tune of the mine drilling bit 14 and backfill drill bit 22
Adjusting range increases the area coverage of exploitation, backfill at 0-45 °, reduces the travel frequency of external equipment, improves working efficiency.
Embodiment 6
A kind of method of two-way horizontal well hot fume sealing and circulating exploitation oil-sand, comprising the following steps:
S1: main tunnel (12) are excavated；
S2: two-way horizontal twist bit (13) is placed in main tunnel (12), and the exploitation of two-way horizontal twist bit (12) is bored
Head (14) rotates forward, and produces oil-sand；
S3: the oil-sand of mine drilling bit (14) extraction is delivered to rotation pyrolysis oven (9) through sand-feeding tube road (11)；
S4: rotation pyrolysis oven (9) is set to ground, and oil-sand is carried out carbonization, obtains pyrolysis gas and tailings；
S5: tailings is backfilled to by backfill drill bit (22) reversion of two-way horizontal twist bit (13) through sediment outflow pipeline (15)
Underground.
Preferably, further include step S6: pyrolysis gas be delivered to condensation separator (16), obtain condensed water, cold oil and
Combustible gas.
Preferably, further include step S7: condensed water being delivered to sediment outflow pipeline (15) and tailings is backfilled to underground together.
Preferably, further include step S8: being delivered to rotation pyrolysis oven (9) after combustible gas is mixed with air and be thermally formed heat
Flue gas inputs hot fume in mine drilling bit (14) drilling rod.
Preferably, further include step S9: the oil-sand fallen will be bored and hot fume mixture is delivered to oil-sand caching degassing tank
(10) it deaerates, then is delivered to rotation pyrolysis oven (9) and continues to heat.
According to pay sand thickness, buried depth and stability, the safety such as shield machine mine working or the outdoor excavation of excavator is chosen
Economic mode carries out the excavation in main tunnel, and thickness is big, buries the pay sand of depth and stability difference, chooses shield machine mine working
Main tunnel 12；Thickness is thin, buries shallow and good stability pay sand, chooses the outdoor main tunnel 12 of excavation of excavator, main tunnel 12
After excavating well, rotation pyrolysis oven 9 is placed in main 12 side of tunnel, and two-way horizontal twist bit 13 is placed under main tunnel 12, excavates
The oil-sand in main tunnel 12 enters reacting furnace 19 and carries out carbonization, resolves into empyreumatic oil, pyrolysis gas and tailings；Empyreumatic oil is through oil extraction
Furnace 20 is directly discharged in main tunnel 12, and tailings is discharged through sediment outflow pipeline 15, and pyrolysis gas is flow to by the way that second pipe (2) are closed
Condensation separator 16 isolates cold oil, condensed water and combustible gas；Condensed water is delivered to sediment outflow pipeline through the 6th pipeline 6, flammable
Gas, it is outer be mixed into air jet mixer 17 for combustion gas and air, then spray into reacting furnace 19 through the 4th pipeline 4 and heat, it is empty
Gas jet mixer 17 is according to the automatic adjustment such as pressure, temperature, flow of discharge hot fume whiff pressure, mixed proportion and gas
Flow, automatic adjustment generates the high pressure hot fume that pressure is higher than 100 DEG C greater than 1Mpa and temperature to rotation pyrolysis oven 9 as needed,
High pressure hot fume enters in 14 drilling rod of mine drilling bit through 1 sealing and circulating of first pipe, and the oil-sand temperature of surrounding increases, viscosity of crude
Fluidisation is reduced, the drillability and mobility of pay sand improve, and two-way horizontal twist bit 13 drives mine drilling bit 14 to pierce high temperature
Oil-sand mine drills out oil-sand and is delivered to the oil-sand caching purification degassing of degassing tank 10, then is delivered to 19 destructive distillation of reacting furnace through the 7th pipeline 7
Pyrolysis；The driving backfill drill bit 22 of two-way horizontal rotary rig 13 exits, and carries tailings in time and condensed water mixing is backfilling into and has adopted
Oil-sand discards horizontal well；After two-way horizontal twist bit 13 completes tailing backfill, by main tunnel 12, all backfill restores ground completely
Under, hole and bottom surface ecological environment, realize the efficient of empyreumatic oil, cold oil and combustible gas, energy-saving and environmental protection development and utilization and tail
Sand and the in situ of condensed water balance, are safe and environment-friendly, permanently burying.
As described above, the present invention can be realized preferably.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, according to
According to technical spirit of the invention, within the spirit and principles in the present invention, it is to the above embodiments it is any it is simple modification,
Equivalent replacement and improve etc., fall within the scope of protection of the technical scheme of the present invention within.
Claims (10)
1. a kind of system of two-way horizontal well hot fume sealing and circulating exploitation oil-sand, including oil-sand exploit backfilling unit, feature
It is, the oil-sand exploitation backfilling unit includes two-way under the rotation pyrolysis oven (9) and main tunnel (12) being set on ground
Horizontal spiral drilling machine (13), the interior rotation pyrolysis oven (9) includes reacting furnace (19), sediment outflow furnace (18), product furnace (21) and row
Oil oven (20), two-way horizontal twist bit (13) two sides are also connected with mine drilling bit (14) and backfill drill bit (22) respectively,
Sand-feeding tube road (11) are equipped between the rotation pyrolysis oven (9) and mine drilling bit (14), the row of being equipped between backfill drill bit (22)
Sand pipeline (15), the connection of the sand-feeding tube road (11) and reacting furnace (19) feed inlet, the sediment outflow pipeline (15) and sediment outflow furnace
(18) discharge port is connected to.
2. a kind of system of two-way horizontal well hot fume sealing and circulating exploitation oil-sand according to claim 1, feature exist
In further including gas circulation unit, the gas circulation unit includes the first pipe being connected to reacting furnace (19) gas outlet
(1), the air jet mixer (17) being connected to reacting furnace (19) air inlet, the condensation separation with product furnace (21) outlet
Device (16), the air jet mixer (17) are equipped with third pipeline (3), the water outlet and sediment outflow of the condensation separator (16)
Pipeline (15) connection, the gas outlet of the condensation separator (16) is connected to air jet mixer (17).
3. a kind of system of two-way horizontal well hot fume sealing and circulating exploitation oil-sand according to claim 2, feature exist
In the first pipe (1) passes through sand-feeding tube road (11) far from one end of rotation pyrolysis oven (9) and extends to mine drilling bit (14)
It is interior.
4. a kind of system of two-way horizontal well hot fume sealing and circulating exploitation oil-sand according to claim 1, feature exist
In the oil-sand exploitation backfilling unit further includes oil-sand caching degassing tank (10), is set at the top of oil-sand caching degassing tank (10)
There is the 8th pipeline (8), the discharge port of oil-sand caching degassing tank (10) is connected to the feed inlet of reacting furnace (19), oil-sand caching
The feed inlet of degassing tank (10) is connected to sand-feeding tube road (11).
5. a kind of system of two-way horizontal well hot fume sealing and circulating exploitation oil-sand according to claim 1, feature exist
In two-way horizontal twist bit (13) the horizontal rotation angle range is at 0 ° -- 360 °, the mine drilling bit (14) and backfill
The tilt adjustment range of drill bit (22) is at 0-45 °.
6. a kind of method of two-way horizontal well hot fume sealing and circulating exploitation oil-sand, which comprises the following steps:
S1: main tunnel (12) are excavated；
S2: two-way horizontal twist bit (13) is placed in main tunnel (12), the mine drilling bit of two-way horizontal twist bit (12)
(14) it rotates forward, produces oil-sand；
S3: the oil-sand of mine drilling bit (14) extraction is delivered to rotation pyrolysis oven (9) through sand-feeding tube road (11)；
S4: rotation pyrolysis oven (9) is set to ground, and oil-sand is carried out carbonization, obtains pyrolysis gas, hot fume and tailings；
S5: tailings is backfilled to discarded by backfill drill bit (22) reversion of two-way horizontal twist bit (13) through sediment outflow pipeline (15)
Well.
7. a kind of method of two-way horizontal well hot fume sealing and circulating exploitation oil-sand according to claim 6, feature exist
In further including step S6: pyrolysis gas being delivered to condensation separator (16), condensed water, cold oil and combustible gas are obtained.
8. a kind of method of two-way horizontal well hot fume sealing and circulating exploitation oil-sand according to claim 7, feature exist
In further including step S7: condensed water being delivered to sediment outflow pipeline (15) and tailings is backfilled to abandoned well together.
9. a kind of method of two-way horizontal well hot fume sealing and circulating exploitation oil-sand according to claim 8, feature exist
In further including step S8: being delivered to rotation pyrolysis oven (9) after combustible gas is mixed with air and be thermally formed hot fume, by hot cigarette
Gas inputs in mine drilling bit (14) drilling rod.
10. a kind of method of two-way horizontal well hot fume sealing and circulating exploitation oil-sand, feature exist according to claim 9
In further including step S9: the oil-sand fallen will be bored and hot fume mixture is delivered to oil-sand caching degassing tank (10) and deaerates, then conveyed
Continue to heat to rotation pyrolysis oven (9).
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