CN108756821A - Oil well thermoelectric heat generation system and method - Google Patents
Oil well thermoelectric heat generation system and method Download PDFInfo
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- CN108756821A CN108756821A CN201810525009.2A CN201810525009A CN108756821A CN 108756821 A CN108756821 A CN 108756821A CN 201810525009 A CN201810525009 A CN 201810525009A CN 108756821 A CN108756821 A CN 108756821A
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- cold fluid
- fluid
- oil
- pipe
- cold
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/04—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using pressure differences or thermal differences occurring in nature
Abstract
The present invention relates to a kind of oil well thermoelectric heat generation system and methods.System includes defeated module outside pit shaft, fluid circulation module and electric energy.Pit shaft includes casing, oil pipe, thermoelectric generation module and cold fluid injection pipe.Space between internal surface of sleeve pipe and thermoelectric generation module outer wall forms oil jacket inventionannulus flow channel.Oil pipe inner space forms flow channel in oil pipe.The insertion of cold fluid injection pipe is arranged in oil jacket inventionannulus flow channel.Fluid circulation module includes that cold fluid injection pipeline, cold fluid injection pump, cold fluid flow go out pipeline, cold fluid storage container, cold fluid inflow line, oil jacket annular circulation outflow hot fluid and utilize the stratum production fluid flowline after module and heat utilization using module, oil jacket annular circulation outflow fluid flow line, stratum output hot fluid outflow pipeline, stratum output hot fluid.The present invention can save a large amount of construction costs and operating cost, ensure stable electric energy supply, and not interfere with the later use of sewage from oil-well.
Description
Technical field
The invention belongs to geothermal power generation technical fields, and in particular to a kind of oil well thermoelectric heat generation system and method.
Background technology
Currently, a large amount of oil fields enter high water cut stage, some oil wells must not be not related to because aqueous excessively high to stop.In this kind of oil well
In, production layer can not only provide a large amount of fluids, and can also provide a large amount of thermal energy.How to make full use of oil well existing resource,
The extension oil well production service life has become the emphasis of industry concern.The method proposed at present focus primarily upon by coproduction mode come
The geothermal energy of production well provides heat source for fields such as defeated, the plant area's heating of Oilfield Pipelines collection.The North China Oilfield in China utilizes oil well
Output water has carried out low temperature geothermal power generation in ground, achieves certain achievement.
With the progress of semi-conducting material in recent years, thermoelectric power generation technology is gradually risen.It is applied respectively when in semiconductor both sides
When adding different temperature, due to Seebeck effect, electromotive force is just will produce between high temperature side and low temperature side.Using this existing
As can thermal energy be converted directly into electric energy using thermoelectric generation elements.This thermoelectric power generation technology is sent out in waste heat of automotive exhaust gas
It is used widely in the fields such as electricity, industrial afterheat power generation, solar power generation, intelligence wearing.
Invention content
There is the productive prospecting of water yield greatly, more than carrying heat, present invention combination thermoelectric power generation skill for high-water-cut oil-producing well
Art proposes that a kind of oil well thermoelectric heat generation system and method, the system and method can not only save a large amount of construction costs and fortune
Row cost ensures stable electric energy supply, but also does not interfere with the later use of sewage from oil-well.
To achieve the above object, present invention employs following technical schemes：
The present invention relates to a kind of oil well thermoelectric heat generation systems, including：Defeated mould outside pit shaft, fluid circulation module and electric energy
Block.
Specifically, the pit shaft includes the casing, embedding for drilling production layer superstratum successively from up to down and producing layer
Enter the oil pipe being arranged in casing, the thermoelectric generation module being arranged on oil-pipe external wall and cold fluid injection pipe；Described sleeve pipe position
It is equipped with perforated interval in the part of production layer；The top of the oil pipe is concordant with the top of casing, and bottom is located at production layer overlying
The intersection on stratum and production layer；The lower end outside of the oil pipe is by packer setting on internal surface of sleeve pipe；The thermoelectricity hair
Electric module is arranged on the oil pipe above packer, and thermoelectric generation module passes through docking cable and defeated module phase outside electric energy
Even；Space between described sleeve pipe inner wall and thermoelectric generation module outer wall forms oil jacket inventionannulus flow channel；Inside the oil pipe
Space forms flow channel in oil pipe；The cold fluid injection pipe insertion is arranged in oil jacket inventionannulus flow channel, and cold fluid
There is gap between the bottom of injection pipe and the top of packer.
Further, the fluid circulation module includes cold fluid injection pipeline, cold fluid injection pump, cold fluid flow outlet pipe
Line, cold fluid storage container, cold fluid inflow line, oil jacket annular circulation outflow hot fluid utilize module, oil jacket annular circulation
It flows out fluid flow line, stratum output hot fluid outflow pipeline, stratum output hot fluid and utilizes the ground after module and heat utilization
Layer production fluid flowline；The outlet of the cold fluid injection pipeline and cold fluid injection pipe or oil jacket inventionannulus flow channel phase
Even, the entrance of cold fluid injection pipeline is connected with the outlet of cold fluid injection pump, and the entrance of cold fluid injection pump passes through cold fluid
Outflow pipeline is connected with the outlet of cold fluid storage container, and the entrance of cold fluid storage container passes through cold fluid inflow line and oil
Annular circulation outflow hot fluid is covered using the outlet of module to be connected；When cold fluid injects outlet and the cold fluid injection pipe phase of pipeline
Lian Shi, oil jacket annular circulation flow out hot fluid and flow out fluid flow line and oil by oil jacket annular circulation using the entrance of module
Annular space flow channel is covered to be connected；When the outlet that cold fluid injects pipeline is connected with oil jacket inventionannulus flow channel, oil jacket annular space follows
Circulation is gone out hot fluid and is connected with cold fluid injection pipe by oil jacket annular circulation outflow fluid flow line using the entrance of module.
Further, lifting pumping system in underground is installed in the oil pipe.
Further, the pit shaft is the cell structure for drilling stratum, using setting of casing to shaft bottom cementing well mode
It realizes；Described sleeve pipe and production layer and production layer upper caldding layer are close cementing.
Further, it is coated with heat-insulating material on the internal surface of sleeve pipe within the scope of production layer superstratum.
Further, the thermoelectric generation module includes the thermoelectric generator that several groups are serially connected；The thermoelectric power generation
Machine includes several groups thermoelectric power generation unit；The thermoelectric power generation unit includes a N-type semiconductor and a P-type semiconductor, phase
N-type semiconductor and P-type semiconductor are alternately arranged between adjacent thermoelectric power generation unit.
Further, the cross section of described sleeve pipe, oil pipe and cold fluid injection pipe is circle；The oil pipe and casing are same
Axis is arranged；The cross section of the thermoelectric generation module is circular ring shape.
Further, the cold fluid injection pump and cold fluid storage container are respectively positioned on ground.
The invention further relates to a kind of thermoelectric power generation methods using above-mentioned oil well thermoelectric heat generation system：
S1, when cold fluid is injected by cold fluid injection pipe, this approach includes the following steps：
S11, the cold fluid being stored in cold fluid storage container go out pipeline through cold fluid flow and enter the increasing of cold fluid injection pump
After pressure, pipeline is injected by cold fluid and enters cold fluid injection pipe.
S12, cold fluid injection pipe bottom opening is set as cold fluid reacting cycle point, cold fluid injects bottom of the tube from cold fluid
Cold fluid reacting cycle point enters in oil jacket inventionannulus flow channel and flows upwards out ground, flows out fluid stream into oil jacket annular circulation
Dynamic pipeline passes through cold fluid flow using module subsequently into oil jacket annular circulation outflow hot fluid after heat exchange and utilization
Enter pipeline to return in cold fluid storage container.
The hot fluid of output enters packer in the case where stratum drives pressure difference by the perforated interval on casing in S13, production layer
In casing below, hot fluid enters in oil pipe in flow channel under residual compression effect and ground is discharged, and is produced by stratum
Go out hot fluid outflow pipeline to enter stratum output hot fluid and pass through stratum output liquid stream after heat exchange and utilization using module
Dynamic pipeline enters oilfield produced fluid processing system and carries out next stage processing and utilization.
S14, thermoelectric generation module are in oil pipe in flow channel in stratum output hot fluid and oil jacket inventionannulus flow channel
It is produced electricl energy under the action of temperature difference between cycle cold fluid, and by docking cable by defeated module outside electric energy inputing power.
S2, when cold fluid is injected by oil jacket inventionannulus flow channel, this approach includes the following steps：
S21, the cold fluid being stored in cold fluid storage container go out pipeline through cold fluid flow and enter the increasing of cold fluid injection pump
After pressure, pipeline is injected by cold fluid and enters oil jacket inventionannulus flow channel.
S22, cold fluid injection pipe bottom opening is set as cold fluid reacting cycle point, cold fluid enters from cold fluid reacting cycle point
In cold fluid injection pipe and ground is flowed upwards out, fluid flow line is flowed out into oil jacket annular circulation, subsequently into oil jacket ring
Idle loop flows out hot fluid and utilizes module, and after heat exchange and utilization, cold fluid storage is returned by cold fluid inflow line
In container.
The hot fluid of output enters packer in the case where stratum drives pressure difference by the perforated interval on casing in S23, production layer
In casing below, hot fluid enters in oil pipe in flow channel under residual compression effect and ground is discharged, and is produced by stratum
Go out hot fluid outflow pipeline to enter stratum output hot fluid and pass through stratum output liquid stream after heat exchange and utilization using module
Dynamic pipeline enters oilfield produced fluid processing system and carries out next stage processing and utilization.
S24, thermoelectric generation module are in oil pipe in flow channel in stratum output hot fluid and oil jacket inventionannulus flow channel
It is produced electricl energy under the action of temperature difference between cycle cold fluid, and by docking cable by defeated module outside electric energy inputing power.
Further, the cold fluid is any one in water, liquid carbon dioxide, liquid nitrogen.
Further, in step S13 and S23, in the case of stratum energy abundance, into oil pipe in flow channel
Hot fluid be expelled directly out ground；It is insufficient in stratum energy, into oil pipe in hot fluid warp in flow channel
Ground is discharged after the lifting pump system boost of underground.
Compared to the prior art, beneficial effects of the present invention are：
(1) oil well that the present invention makes full use of existing high-water-cut oil-producing well or discarded because aqueous high, has delayed oil
The service life of well.
(2) present invention realizes oil well power generation using the electrothermal module for being arranged in underground.
(3) in the present invention, thermoelectric heat generation system low temperature side and the fluid of high temperature side output still can be used for floor heating, support
It grows, the applications such as bathing.
In conclusion the present invention can not only save a large amount of construction costs and operating cost, ensure stable electric energy supply, and
And the later use of sewage from oil-well is not interfered with also.
Description of the drawings
Fig. 1 is the structural schematic diagram of oil well thermoelectric heat generation system when cold fluid is injected from cold fluid injection pipe；
Fig. 2 is the I-I ' cross-sectional views of Fig. 1；
Fig. 3 is the structural representation of oil well thermoelectric heat generation system when cold fluid is injected from oil jacket inventionannulus flow channel
Figure.
Wherein：
1, layer is produced, 2, shaft bottom, 3, perforated interval, 4, packer, 5, cold fluid reacting cycle point, 6, cold fluid injection pipe, 7,
Oil pipe, 8, casing, 106, pit shaft, 9, thermoelectric generation module, 10, cold fluid injection pump, 11, cold fluid inject pipeline, 12, cold flow
Body storage container, 13, cold fluid flow go out pipeline, 14, stratum output hot fluid utilize module, 15, the outflow of stratum output hot fluid
Pipeline, 16, oil jacket annular circulation outflow hot fluid utilize module, 17, oil jacket annular circulation flow out fluid flow line, 18, cold
Fluid inflow line, 19, the stratum production fluid flowline after heat utilization, 20, underground lift pumping system, 21, defeated mould outside electric energy
Block, 22, docking cable, 101, production layer superstratum, 102, fluid circulation module, 201, oil jacket inventionannulus flow channel, 202,
Flow channel in oil pipe.
Specific implementation mode
The present invention will be further described below in conjunction with the accompanying drawings：
Embodiment one
Oil well thermoelectric heat generation system when cold fluid as shown in Figure 1 is injected from cold fluid injection pipe, the system packet
It includes：Defeated module 21 outside pit shaft 106, fluid circulation module 102 and electric energy.
Specifically, the pit shaft 106 includes drilling production layer superstratum 101 and production layer 1 successively from up to down
Casing 8 is embedded in the oil pipe 7 being arranged in casing 8, the thermoelectric generation module 9 being arranged on 7 outer wall of oil pipe and positioned at casing and oil
Cold fluid injection pipe 6 between pipe.The thousands of rice of 1 buried depth of oil well production layer；The production layer superstratum 101 is made a living payzone 1
With thermal insulation layers such as the sedimentary rock covered up to earth's surface or soil, formation temperature is in continuously decrease trend from bottom to up, less than life
The reservoir temperature of payzone 1.Pit shaft 106 is the cell structure for drilling stratum, sequentially passes through production layer superstratum 101 and production layer
1, it is completed using 8 well cementation mode of setting of casing.8 part of casing in 101 range of production layer superstratum and the close glue in stratum
Knot completely cuts off with formation fluid, and inner wall surface applies heat-insulating material.8 part of casing in production 1 range of layer uses perforation
Completion mode is completed, and perforated interval 3 is formed, and fluid enters the offer of shaft bottom 2 flow channel in payzone 1 of making a living.7 tripping in of oil pipe produces layer
Right over 1,7 bottom of oil pipe is set by packer 4 on casing 8, in 101 range of 7 outer wall of oil pipe and production layer superstratum
8 part of casing form oil jacket inventionannulus flow channel 201.7 inner space of oil pipe forms flow channel 202 in oil pipe.Thermoelectricity is sent out
Electric module 9 is tightly disposed on 7 outer wall of oil pipe.Cold fluid injection pipe 6 passes through 201 tripping in packer 4 of oil jacket inventionannulus flow channel
Surface.
Further, the fluid circulation module 102 includes cold fluid injection pipeline 11, cold fluid injection pump 10, cold flow
Body flows out pipeline 13, cold fluid storage container 12, cold fluid inflow line 18, oil jacket annular circulation outflow hot fluid and utilizes module
16, oil jacket annular circulation outflow fluid flow line 17, stratum output hot fluid outflow pipeline 15, stratum output hot fluid utilize
Stratum production fluid flowline 19 after module 14 and heat utilization.The outlet of the cold fluid injection pipeline 11 is injected with cold fluid
Pipe 6 is connected, and the entrance of cold fluid injection pipeline 11 is connected with the outlet of cold fluid injection pump 10, the entrance of cold fluid injection pump 10
Go out pipeline 13 by cold fluid flow with the outlet of cold fluid storage container 12 to be connected, the entrance of cold fluid storage container 12 passes through cold
Fluid inflow line 18 is connected with oil jacket annular circulation outflow hot fluid using the outlet of module 16.Oil jacket annular circulation outflow heat
Fluid flows out fluid flow line 17 and 201 phase of oil jacket inventionannulus flow channel using the entrance of module 16 by oil jacket annular circulation
Even.
Further, lifting pumping system 20 in underground is installed in the oil pipe 7.Underground lifting pumping system 20 is connected to oil pipe
On 7, to provide energy from the formation fluid of production 1 output of layer and giving rise to ground.The underground lifting pumping system 20 is big row
Electric submersible pump hoisting system is measured, the installation site on oil pipe 7 is by the residual compression in shaft bottom 2, the depth in shaft bottom 2 and production layer
The flow of 1 output hot fluid determines.
Further, the thermoelectric generation module 9 is fastened on 7 outer wall of oil pipe, in 7 tripping in casing 8 of oil pipe.The thermoelectricity
Electricity generation module 9 generate electric energy be connected with defeated module 21 outside electric energy by docking cable 22, by defeated module 21 outside electric energy to
Family provides electric energy.The thermoelectric generation module 9 is connected in series by several groups thermoelectric generator；The several groups thermoelectric generator
It can be 1 group, 10 groups, 100 groups, can also be arbitrary multigroup；The thermoelectric generator is by several N-type semiconductors and several
A P-type semiconductor assembles according to alternating, pairs of arrangement mode；One N-type semiconductor and a P-type semiconductor constitute one
Thermoelectric power generation unit；Described several N-type semiconductors and several P-type semiconductors can be 1,10,100, also may be used
To be any number of；N-type semiconductor quantity and P-type semiconductor quantity are equal.
Further, as shown in Fig. 2, the cross section of described sleeve pipe 8, oil pipe 7 and cold fluid injection pipe 6 is circle；Institute
Oil pipe 7 is stated to be coaxially disposed with casing 8；The cross section of the thermoelectric generation module 9 is circular ring shape.
Further, the cold fluid injection pump 10 and cold fluid storage container 12 are respectively positioned on ground.
Further, the cold fluid injection pipe 6 is made of heat-insulating material, the cold flow from 6 bottom of cold fluid injection pipe
The temperature of the cold fluid flowed out at body reacting cycle point 5 is approximately equal to temperature of the cold fluid when ground enters cold fluid injection pipe 6.
The operation principle of the system is：
The hot fluid for producing 1 output of layer enters shaft bottom 2 in the case where stratum drives pressure difference by perforated interval 3, then utilizes entrance
Residual compression behind shaft bottom 2 flows into oil pipe in flow channel 202, forms the high temperature hot junction of thermoelectric generation module 9.When stratum energy
When amount is sufficient, the hot fluid gone out from production laminar flow is vented directly to ground；When ground energy deficiency, that is, in the surplus of shaft bottom 2
In the case that overbottom pressure power is insufficient to allow the hot fluid from production 1 output of layer to flow to ground, underground is installed in 7 a certain depth of oil pipe
Pumping system 20 is lifted, to being pressurized from the hot fluid of production 1 output of layer so that it flows to ground.Cold fluid injection pump 10 is in the future
After the cold fluid supercharging of self cooling fluid-storing container 12, pipeline 11 is injected by cold fluid and is injected in cold fluid injection pipe 6, through increasing
Cold fluid after pressure flows to 4 top of packer along cold fluid injection pipe 6, enters oil jacket Annular cutting from cold fluid reacting cycle point 5
In dynamic channel 201.Under the action of surface injection pressure, enter in oil jacket inventionannulus flow channel 201 from cold fluid reacting cycle point 5
Cold fluid flowed up along oil jacket inventionannulus flow channel 201, formed thermoelectric generation module 9 low temperature cold end；Cold fluid edge
It during oil jacket inventionannulus flow channel 201 flows up, absorbs heat from surrounding and become hot fluid, pass through oil jacket annular circulation
It flows out fluid flow line 17 and utilizes module 16 into oil jacket annular circulation outflow hot fluid.From oil jacket inventionannulus flow channel 201
The hot fluid of outflow becomes cold after being completely heat exchanged and utilizing during oil jacket annular circulation flows out hot fluid using module 16
After fluid, entered in cold fluid storage container 12 by cold fluid inflow line 18.Cold fluid storage container 12, cold fluid outflow
Pipeline 13, cold fluid injection pump 10, cold fluid injection pipeline 11, cold fluid injection pipe 6, oil jacket inventionannulus flow channel 201, oil jacket
Annular circulation flows out fluid flow line 17, oil jacket annular circulation outflow hot fluid utilizes module 16 and cold fluid inflow line 18
The cold fluid for constituting a closure flows the circulatory system, and continuous cold energy is provided for thermoelectric generation module 9.Thermoelectric generation module 9
The low-temperature circulating fluid in high-temperature stratum produced fluid and oil jacket inventionannulus flow channel 201 in oil pipe in flow channel 202
Temperature difference under the action of realize underground thermoelectric power generation.The hot fluid on the outflow of flow channel 202 ground passes through stratum out of oil pipe
Output hot fluid flows out pipeline 15 and utilizes module 14 into stratum output hot fluid.Flow channel 202 flows out ground out of oil pipe
Hot fluid entrained by heat, after on stratum, output hot fluid is completely heat exchanged and utilizes using module 14, then pass through
Stratum production fluid flowline 19 after heat utilization enters oilfield produced fluid processing system and carries out next stage processing and utilization.It is excellent
Choosing, the cold fluid is water, liquid carbon dioxide, liquid nitrogen.
The reality of oil well thermoelectric heat generation system when cold fluid described in the present embodiment is injected from cold fluid injection pipe
Now method is：
(1) oil well selected high-water-cut oil-producing well or discarded because aqueous high.1 depth of layer is produced according to it, by outer wall
The oil pipe 7 of thermoelectric generation module 9 is consolidated with above production layer 1, and is set oil pipe 7 on casing 8 using packer 4.
Underground is lifted into pumping system 20 according to the flow of the residual compression in shaft bottom 2, the depth in shaft bottom 2 and production 1 output hot fluid of layer
At 7 certain depth of oil pipe.
(2) by 6 tripping in oil jacket inventionannulus flow channel 201 of cold fluid injection pipe, until 4 top of packer.
(3) it is sequentially connected cold fluid storage container 12, cold fluid flow goes out pipeline 13, cold fluid injection pump 10, cold fluid note
Enter pipeline 11, and cold fluid injection pipeline 11 is connected with cold fluid injection pipe 6.Oil jacket inventionannulus flow channel 201 is passed through into oil
Set annular circulation flowing out stream body flowline 17 is connected with oil jacket annular circulation outflow hot fluid using module 16.Oil jacket annular space follows
Circulation goes out hot fluid and is connected to cold fluid storage container 12 by cold fluid inflow line 18 using module 16, to constitute one
The cold flow systemic circulatory system of closure.
(4) output hot fluid outflow pipeline 15 in stratum is connected with flow channel in oil pipe 202, then is sequentially connected stratum production
Go out hot fluid and utilize module 14 and stratum production fluid flowline 19, constitutes stratum produced fluid flow passage.
(5) thermoelectric generation module 9 is connected by docking cable 22 with defeated module 21 outside electric energy, constitutes a circuit system
System.
(6) cold fluid being stored in cold fluid storage container 12 goes out pipeline 13 through cold fluid flow and enters cold fluid injection
After 10 supercharging of pump, pipeline 11 is injected by cold fluid and enters cold fluid injection pipe 6.
(7) 6 bottom opening of cold fluid injection pipe is set as cold fluid reacting cycle point 5, cold fluid is from 6 bottom of cold fluid injection pipe
Cold fluid reacting cycle point 5 enter in oil jacket inventionannulus flow channel 201 and flow upwards out ground, flowed out into oil jacket annular circulation
Fluid flow line 17 utilizes module 16 subsequently into oil jacket annular circulation outflow hot fluid, leads to after heat exchange and utilization
Cold fluid flow is crossed to enter in the return cold fluid of pipeline 18 storage container 12.
(8) hot fluid for producing output in layer 1 is below into packer 4 by perforated interval 3 in the case where stratum drives pressure difference
In casing 8, hot fluid enters in oil pipe in flow channel 202 under residual compression effect and ground is discharged, and passes through stratum output
Hot fluid flows out pipeline 15 and enters stratum output hot fluid using module 14, passes through stratum output liquid stream after heat exchange and utilization
Dynamic pipeline 19 enters oilfield produced fluid processing system and carries out next stage processing and utilization.When stratum energy abundance, into oil
The hot fluid in Bottomhole pressure channel is expelled directly out ground；When stratum energy deficiency, into oil pipe in flow channel hot fluid
Through underground, ground is discharged after being pressurized in lifting pumping system 20.
(9) thermoelectric generation module 9 stratum output hot fluid and oil jacket inventionannulus flow channel in flow channel 202 in oil pipe
It is produced electricl energy under the action of temperature difference in 201 between cycle cold fluid, and will be outside electric energy inputing power by docking cable 22
Defeated module 21.
Embodiment two
Oil well thermoelectric heat generation system when cold fluid as shown in Figure 3 is injected from oil jacket inventionannulus flow channel, with reality
Apply described in example one shaft type heat exchange closed cycle underground thermoelectric heat generation system difference lies in：The cold fluid injection pipeline goes out
Mouth is connected with oil jacket inventionannulus flow channel, and oil jacket annular circulation outflow hot fluid passes through oil jacket annular circulation using the entrance of module
Outflow fluid flow line is connected with cold fluid injection pipe.The operation principle of the system is：It is stored in cold fluid storage container 12
In cold fluid go out pipeline 13 through cold fluid flow and enter after cold fluid injection pump 10 is pressurized, pass through cold fluid and inject pipeline 11 and enter
Oil jacket inventionannulus flow channel 201.If 6 bottom opening of cold fluid injection pipe is cold fluid reacting cycle point 5, cold fluid is from oil jacket annular space
The cold fluid reacting cycle point 5 of 6 bottom of cold fluid injection pipe enters in cold fluid injection pipe 6 and flows upward in flow channel 201
Fluid flow line 17 is flowed out in ground into oil jacket annular circulation, and mould is utilized subsequently into oil jacket annular circulation outflow hot fluid
Block 16 is returned by cold fluid inflow line 18 in cold fluid storage container 12 after heat exchange and utilization.It is produced in production layer 1
The hot fluid gone out enters in the case where stratum drives pressure difference in 4 casing 8 below of packer, and hot fluid enters under residual compression effect
In flow channel 202 and it is discharged ground in oil pipe, passes through stratum output hot fluid and flow out pipeline 15 and enter stratum output hot fluid
Using module 14, the progress of oilfield produced fluid processing system is entered by stratum production fluid flowline 19 through heat exchange and after
Next stage handles and utilizes.The stratum production in flow channel 202 in oil pipe of thermoelectric generation module 9 in 7 outer wall of oil pipe is set
Go out in hot fluid and oil jacket inventionannulus flow channel 201 under the action of the temperature difference recycled between cold fluid and produce electricl energy, and passes through
Docking cable 22 is by defeated module 21 outside electric energy inputing power.
Other are the same as embodiment one.
Oil well thermoelectric heat generation system when cold fluid described in the present embodiment is injected from oil jacket inventionannulus flow channel
Implementation method be：
(1) oil well selected high-water-cut oil-producing well or discarded because aqueous high.1 depth of layer is produced according to it, by outer wall
The oil pipe 7 of thermoelectric generation module 9 is consolidated with above production layer 1, and is set oil pipe 7 on casing 8 using packer 4.
Underground is lifted into pumping system 20 according to the flow of the residual compression in shaft bottom 2, the depth in shaft bottom 2 and production 1 output hot fluid of layer
At 7 certain depth of oil pipe.
(2) by 6 tripping in oil jacket inventionannulus flow channel 201 of cold fluid injection pipe, until 4 top of packer.
(3) it is sequentially connected cold fluid storage container 12, cold fluid flow goes out pipeline 13, cold fluid injection pump 10, cold fluid note
Enter pipeline 11, and cold fluid injection pipeline 11 is connected with oil jacket inventionannulus flow channel 201.Cold fluid injection pipe 6 is passed through into oil
Set annular circulation flowing out stream body flowline 17 is connected with oil jacket annular circulation outflow hot fluid using module 16；Oil jacket annular space follows
Circulation goes out hot fluid and is connected to cold fluid storage container 12 by cold fluid inflow line 18 using module 16, to constitute one
The cold flow systemic circulatory system of closure.
(4) output hot fluid outflow pipeline 15 in stratum is connected with flow channel in oil pipe 202, then is sequentially connected stratum production
Go out hot fluid and utilize module 14 and stratum production fluid flowline 19, constitutes stratum produced fluid flow passage.
(5) thermoelectric generation module 9 is connected by docking cable 22 with defeated module 21 outside electric energy, constitutes a circuit system
System.
(6) cold fluid being stored in cold fluid storage container 12 goes out pipeline 13 through cold fluid flow and enters cold fluid injection
After 10 supercharging of pump, pipeline 11 is injected by cold fluid and enters oil jacket inventionannulus flow channel 201.
(7) 6 bottom opening of cold fluid injection pipe is set as cold fluid reacting cycle point 5, cold fluid is from oil jacket inventionannulus flow channel
The cold fluid reacting cycle point 5 of 6 bottom of cold fluid injection pipe enters in cold fluid injection pipe 6 and flows upward to ground in 201, enters
Oil jacket annular circulation flows out fluid flow line 17, utilizes module 16 subsequently into oil jacket annular circulation outflow hot fluid, passes through
After heat exchange and utilization, returned in cold fluid storage container 12 by cold fluid inflow line 18.
(8) hot fluid for producing output in layer 1 enters in the case where stratum drives pressure difference in 4 casing 8 below of packer, hot-fluid
Body enters in oil pipe in flow channel 202 under residual compression effect and ground is discharged, and passes through stratum output hot fluid effuser
Line 15 enter stratum output hot fluid utilize module 14, after heat exchange and utilization, by stratum production fluid flowline 19 into
Enter oilfield produced fluid processing system and carries out next stage processing and utilization.It is logical into oily Bottomhole pressure when stratum energy abundance
The hot fluid in road 202 is expelled directly out ground；When stratum energy deficiency, into oil pipe in flow channel 202 hot fluid through well
Ground is discharged after being pressurized in lower lifting pumping system 20.
(9) thermoelectric generation module 9 stratum output hot fluid and oil jacket inventionannulus flow channel in flow channel 202 in oil pipe
It is produced electricl energy under the action of temperature difference in 201 between cycle cold fluid, and will be outside electric energy inputing power by docking cable 22
Defeated module 21.
Claims (10)
1. oil well thermoelectric heat generation system, which is characterized in that including：Defeated module outside pit shaft, fluid circulation module and electric energy；
The pit shaft includes drilling production layer superstratum successively from up to down and producing the casing of layer, embedded setting in casing
Oil pipe, the thermoelectric generation module that is arranged on oil-pipe external wall and cold fluid injection pipe；Described sleeve pipe is located at the part of production layer
It is equipped with perforated interval；The top of the oil pipe is concordant with the top of casing, and bottom is located at production layer superstratum and produces layer
Intersection；The lower end outside of the oil pipe is by packer setting on internal surface of sleeve pipe；The thermoelectric generation module setting is in place
On oil pipe above the packer, and thermoelectric generation module is connected by docking cable with defeated module outside electric energy；In described sleeve pipe
Space between wall and thermoelectric generation module outer wall forms oil jacket inventionannulus flow channel；The oil pipe inner space is formed in oil pipe
Flow channel；Cold fluid injection pipe insertion is arranged in oil jacket inventionannulus flow channel, and the bottom of cold fluid injection pipe with
There is gap between the top of packer；
The fluid circulation module includes cold fluid injection pipeline, cold fluid injection pump, cold fluid flow goes out pipeline, cold fluid stores
Container, cold fluid inflow line, oil jacket annular circulation outflow hot fluid flow out fluid flow pipe using module, oil jacket annular circulation
Line, stratum output hot fluid outflow pipeline, stratum output hot fluid utilize the stratum production fluid flow duct after module and heat utilization
Line；The outlet of the cold fluid injection pipeline is connected with cold fluid injection pipe or oil jacket inventionannulus flow channel, cold fluid injection pipe
The entrance of line is connected with the outlet of cold fluid injection pump, and the entrance of cold fluid injection pump goes out pipeline and cold fluid by cold fluid flow
The outlet of storage container is connected, and the entrance of cold fluid storage container flows out heat by cold fluid inflow line and oil jacket annular circulation
Fluid is connected using the outlet of module；When the outlet that cold fluid injects pipeline is connected with cold fluid injection pipe, oil jacket annular space follows
Circulation goes out hot fluid and flows out fluid flow line and oil jacket inventionannulus flow channel by oil jacket annular circulation using the entrance of module
It is connected；When the outlet that cold fluid injects pipeline is connected with oil jacket inventionannulus flow channel, oil jacket annular circulation flows out hot fluid profit
Fluid flow line is flowed out with the entrance of module by oil jacket annular circulation with cold fluid injection pipe to be connected.
2. oil well thermoelectric heat generation system according to claim 1, which is characterized in that be equipped with underground in the oil pipe
Lift pumping system.
3. oil well thermoelectric heat generation system according to claim 1, which is characterized in that the pit shaft is to drill stratum
Cell structure is realized using setting of casing to shaft bottom cementing well mode；Described sleeve pipe and production layer and production layer upper caldding layer
It is close cementing.
4. oil well thermoelectric heat generation system according to claim 1, which is characterized in that described in producing layer overlying
It is coated with heat-insulating material on internal surface of sleeve pipe in layer range.
5. oil well thermoelectric heat generation system according to claim 1, which is characterized in that the thermoelectric generation module includes
The thermoelectric generator that several groups are serially connected；The thermoelectric generator includes several groups thermoelectric power generation unit；The thermoelectric power generation
Unit includes a N-type semiconductor and a P-type semiconductor, and N-type semiconductor and p-type are partly led between adjacent thermoelectric power generation unit
Body is alternately arranged.
6. oil well thermoelectric heat generation system according to claim 1, it is characterised in that：Described sleeve pipe, oil pipe and cold flow
The cross section of body injection pipe is circle；The oil pipe is coaxially disposed with casing；The cross section of the thermoelectric generation module is circle
Annular.
7. oil well thermoelectric heat generation system according to claim 1, which is characterized in that the cold fluid injection pump and cold
Fluid-storing container is respectively positioned on ground.
8. a kind of thermoelectric power generation method using the oil well thermoelectric heat generation system described in claim 1~6 any one,
It is characterized in that,
S1, when cold fluid is injected by cold fluid injection pipe, this approach includes the following steps：
S11, the cold fluid being stored in cold fluid storage container go out pipeline through cold fluid flow and enter the supercharging of cold fluid injection pump
Afterwards, pipeline is injected by cold fluid and enters cold fluid injection pipe；
S12, cold fluid injection pipe bottom opening is set as cold fluid reacting cycle point, cold fluid injects the cold flow of bottom of the tube from cold fluid
Body reacting cycle point enters in oil jacket inventionannulus flow channel and flows upwards out ground, flows out fluid flow pipe into oil jacket annular circulation
Line utilizes module subsequently into oil jacket annular circulation outflow hot fluid, after heat exchange and utilization, is flowed into and managed by cold fluid
Line returns in cold fluid storage container；
The hot fluid of output enters packer or less in the case where stratum drives pressure difference by the perforated interval on casing in S13, production layer
Casing in, hot fluid enters in oil pipe in flow channel under residual compression effect and ground is discharged, and passes through stratum output heat
Fluid effuser line enters stratum output hot fluid and passes through stratum production fluid flow duct after heat exchange and utilization using module
Line enters oilfield produced fluid processing system and carries out next stage processing and utilization；
S14, thermoelectric generation module recycle in flow channel in stratum output hot fluid and oil jacket inventionannulus flow channel in oil pipe
It is produced electricl energy under the action of temperature difference between cold fluid, and by docking cable by defeated module outside electric energy inputing power；
S2, when cold fluid is injected by oil jacket inventionannulus flow channel, this approach includes the following steps：
S21, the cold fluid being stored in cold fluid storage container go out pipeline through cold fluid flow and enter the supercharging of cold fluid injection pump
Afterwards, pipeline is injected by cold fluid and enters oil jacket inventionannulus flow channel；
S22, cold fluid injection pipe bottom opening is set as cold fluid reacting cycle point, cold fluid enters cold flow from cold fluid reacting cycle point
In body injection pipe and ground is flowed upwards out, fluid flow line is flowed out into oil jacket annular circulation, is followed subsequently into oil jacket annular space
Circulation goes out hot fluid and utilizes module, and after heat exchange and utilization, cold fluid storage container is returned by cold fluid inflow line
In；
The hot fluid of output enters packer or less in the case where stratum drives pressure difference by the perforated interval on casing in S23, production layer
Casing in, hot fluid enters in oil pipe in flow channel under residual compression effect and ground is discharged, and passes through stratum output heat
Fluid effuser line enters stratum output hot fluid and passes through stratum production fluid flow duct after heat exchange and utilization using module
Line enters oilfield produced fluid processing system and carries out next stage processing and utilization；
S24, thermoelectric generation module recycle in flow channel in stratum output hot fluid and oil jacket inventionannulus flow channel in oil pipe
It is produced electricl energy under the action of temperature difference between cold fluid, and by docking cable by defeated module outside electric energy inputing power.
9. thermoelectric power generation method according to claim 8, it is characterised in that：The cold fluid be water, liquid carbon dioxide,
Any one in liquid nitrogen.
10. thermoelectric power generation method according to claim 8, it is characterised in that：In step S13 and S23, in stratum energy
In the case of abundance, into oil pipe in hot fluid in flow channel be expelled directly out ground；In the insufficient situation of stratum energy
Under, into oil pipe in hot fluid in flow channel ground is discharged after the lifting pump system boost of underground.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109681158A (en) * | 2019-03-04 | 2019-04-26 | 中国石油大学(华东) | A kind of device for carbon dioxide flooding oil tech |
| WO2020139780A1 (en) * | 2018-12-27 | 2020-07-02 | James William Weir | Systems and methods for electrical power generation |
| CN113153222A (en) * | 2020-12-02 | 2021-07-23 | 中国石油大学(华东) | Underground temperature difference power generation system based on vortex tube and power generation method and design implementation method thereof |
| WO2023186803A1 (en) * | 2022-03-28 | 2023-10-05 | Affin As | Assembly for generating electricity in a production well of a hot fluid |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201650630U (en) * | 2010-03-09 | 2010-11-24 | 上海海事大学 | Device generating electricity by solar energy and terrestrial heat |
| CN202215446U (en) * | 2011-09-06 | 2012-05-09 | 徐毅 | System using media with low boiling point in middle-low-temperature geothermal well to obtain heat |
| CN103225598A (en) * | 2013-04-27 | 2013-07-31 | 清华大学 | Method and system for accumulating energy by compressed air and heat accumulation medium simultaneously |
| JP2014084857A (en) * | 2012-10-28 | 2014-05-12 | Yasuharu Kawabata | Binary power generation system |
| CN204572361U (en) * | 2015-03-27 | 2015-08-19 | 重庆天豪建材有限责任公司 | One is heat generating system cryogenically |
| WO2016035770A1 (en) * | 2014-09-02 | 2016-03-10 | 国立大学法人京都大学 | Geothermal heat exchanger, liquid transport pipe, liquid raising pipe, geothermal power generation facility, and geothermal power generation method |
| CN105674608A (en) * | 2016-02-17 | 2016-06-15 | 姚国敏 | Device and method for extracting and utilizing geothermal energy |
| CN105683679A (en) * | 2013-09-05 | 2016-06-15 | 沙特阿拉伯石油公司 | Method of using concentrated solar power (CSP) for thermal gas well deliquification |
| CN105863568A (en) * | 2016-04-14 | 2016-08-17 | 中国石油大学(华东) | Method for exploring dry-hot-rock geotherm through underground heat siphon self-circulation |
| CN105958870A (en) * | 2016-06-29 | 2016-09-21 | 中国石油大学(华东) | Composite cold-source hot dry rock thermoelectric power generation system and method |
| CN107939621A (en) * | 2017-12-01 | 2018-04-20 | 西安交通大学 | S CO based on fin casing exploitation hot dry rock geothermal energy2Electricity generation system and method |
-
2018
- 2018-05-28 CN CN201810525009.2A patent/CN108756821B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201650630U (en) * | 2010-03-09 | 2010-11-24 | 上海海事大学 | Device generating electricity by solar energy and terrestrial heat |
| CN202215446U (en) * | 2011-09-06 | 2012-05-09 | 徐毅 | System using media with low boiling point in middle-low-temperature geothermal well to obtain heat |
| JP2014084857A (en) * | 2012-10-28 | 2014-05-12 | Yasuharu Kawabata | Binary power generation system |
| CN103225598A (en) * | 2013-04-27 | 2013-07-31 | 清华大学 | Method and system for accumulating energy by compressed air and heat accumulation medium simultaneously |
| CN105683679A (en) * | 2013-09-05 | 2016-06-15 | 沙特阿拉伯石油公司 | Method of using concentrated solar power (CSP) for thermal gas well deliquification |
| WO2016035770A1 (en) * | 2014-09-02 | 2016-03-10 | 国立大学法人京都大学 | Geothermal heat exchanger, liquid transport pipe, liquid raising pipe, geothermal power generation facility, and geothermal power generation method |
| CN204572361U (en) * | 2015-03-27 | 2015-08-19 | 重庆天豪建材有限责任公司 | One is heat generating system cryogenically |
| CN105674608A (en) * | 2016-02-17 | 2016-06-15 | 姚国敏 | Device and method for extracting and utilizing geothermal energy |
| CN105863568A (en) * | 2016-04-14 | 2016-08-17 | 中国石油大学(华东) | Method for exploring dry-hot-rock geotherm through underground heat siphon self-circulation |
| CN105958870A (en) * | 2016-06-29 | 2016-09-21 | 中国石油大学(华东) | Composite cold-source hot dry rock thermoelectric power generation system and method |
| CN107939621A (en) * | 2017-12-01 | 2018-04-20 | 西安交通大学 | S CO based on fin casing exploitation hot dry rock geothermal energy2Electricity generation system and method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020139780A1 (en) * | 2018-12-27 | 2020-07-02 | James William Weir | Systems and methods for electrical power generation |
| EP3902998A4 (en) * | 2018-12-27 | 2022-08-17 | National Oilwell Varco, L.P. | Systems and methods for electrical power generation |
| CN109681158A (en) * | 2019-03-04 | 2019-04-26 | 中国石油大学(华东) | A kind of device for carbon dioxide flooding oil tech |
| CN113153222A (en) * | 2020-12-02 | 2021-07-23 | 中国石油大学(华东) | Underground temperature difference power generation system based on vortex tube and power generation method and design implementation method thereof |
| WO2023186803A1 (en) * | 2022-03-28 | 2023-10-05 | Affin As | Assembly for generating electricity in a production well of a hot fluid |
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| Publication number | Publication date |
|---|---|
| CN108756821B (en) | 2020-06-19 |
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