CN207230982U - By abandoned oil/heat source system of the gas well transformation for water flood recovery - Google Patents
By abandoned oil/heat source system of the gas well transformation for water flood recovery Download PDFInfo
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- CN207230982U CN207230982U CN201721148134.3U CN201721148134U CN207230982U CN 207230982 U CN207230982 U CN 207230982U CN 201721148134 U CN201721148134 U CN 201721148134U CN 207230982 U CN207230982 U CN 207230982U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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Abstract
The utility model provides a kind of heat source system transformed by abandoned oil/gas well for water flood recovery, including adopts hot well, by the secondary renovation and utilization of disused well, for obtaining underground deep layer geothermal energy resources；Casing, is marked with the endcapped tube body of heat-exchange working medium；Heat-exchange system, for exchanging the thermal energy being collected into using thermal energy acquisition system；Above-ground line circulator, for making heat-conducting work medium be circulated in described sleeve pipe, so as to ensure the supply of thermal energy.The utility model uses closed design, does not carry out mass exchange with underground environment, had not only overcome directly using geothermal water high energy consumption, and had needed recharge, causes the shortcomings that ground thermal pollution and surface collapse, but also has improved heat exchanger effectiveness.
Description
Technical field
It the utility model is related to a kind of by abandoned oil/heat source system of the gas well transformation for water flood recovery, more particularly to one
The heat source system that by abandoned oil/gas well transformation is used for water flood recovery of the kind comprising two-stage treatment network.
Background technology
In oil extraction process, the needs such as oil transportation facility heat tracing, flood pattern heating, mining area office heating use a large amount of energy
Source.And discarded oil/gas well has the potential extraction value of very high deep earth heart energy, the heat of output can reduce fossil energy
Consumption, realize energy-saving and emission-reduction, the strategic objective of environmental protection.Traditional geothermal energy acquisition system is by injection well and production
Connected between well by pipeline, form the path of heat transfer medium, this traditional approach takes time and effort, it is new exploit hot well success rate compared with
It is low, do not meet the strategic objective of energy-saving and emission-reduction.
Utility model content
The utility model utilizes the crack generated during production of hydrocarbons to deep formation pressure break, by aqueous Fracture Networks
Artificial geothermal reservoir is formed with deep high-temperature stratum.In artificial geothermal reservoir, by the geothermal well for discarding oil/gas well transformation
It is interior filled with recirculated water.The recirculated water for being used for underground heat energy collection is in the closed pipe system of geothermal well all the time, is not taken out of
Geothermal water, with stratum without mass exchange, avoids generation environment from polluting.Specifically, the utility model provides following skill
Art scheme：
The utility model provides a set of deep geothermal heat and can gather, using system, including：
Hot well is adopted, hot well is adopted and is formed by transformations such as waste petroleum well, the natural gas well, shale gas/oil wells, for obtaining underground
Deep geothermal resources, adopting hot well includes thermal energy capture segment, and the thermal energy capture segment for adopting hot well is located at deeper subsurface high-temperature rock stratum.Thermal energy
Part or all of capture segment is wrapped up by underground high-temperature rock stratum chicken-wire cracking.Chicken-wire cracking can be by high porosity, Thief zone
The rock mass of rate naturally occurs, and can also be formed by artificial fracturing during oil-gas mining and artificially descended heat reservori.
Closed sleeve pipe, along hot well setting is adopted, the closed sleeve pipe is coaxitron, interior to be equipped with interlayer, the end of interlayer
Connected between the central tube of casing, heat-exchange working medium is marked with casing.Central tube is double-layer vacuum structure.
Pipeline circulating system, for make heat-exchange working medium in described sleeve pipe along interlayer downwards then it is upward by central tube
Carry out closed circulation.
Ground heat-energy utilizing device, including closed heat exchanger, by heating heat-exchange working medium outflow central tube with it is described
Closed heat exchanger carries out heat exchange, and heat-exchange working medium enters the interlayer of closed sleeve pipe after heat exchange, reenters closed follow
Loop system.The thermal energy that closed heat-exchanger rig collects on the ground is delivered to by pipe network and is nearby utilized, such as can be added nearby
Production hot water in the producing well on thermal recovery hot well periphery, injects for hot water and recovers the oil；Or for neighbouring residential area, industrial production
Heat supply, or cogeneration of heat and power is carried out, realize making full use of for exploitation thermal energy.It is preferable that ground heat-energy utilizing device includes one
Level processing net and two stage treatment net.The level-one net includes：Level-one net pipe circle pump and closed heat exchanger and level-one net
Water treatment facilities, circulating pump are connected with adopting the central tube of hot well steel sleeve, for heated heat-exchange working medium to be sent to closing
Exchange heat in formula heat exchanger；Level-one net water treatment facilities are connected with level-one net, for when level-one net water shortage by softened water
Squeeze into level-one net system, keep system pressure constant.Two level net is the pipe network for oil field industrial water, the closing in level-one net
Formula heat exchanger carries out heat exchange to the industrial water in two level net.Preferred embodiment is, secondary network include distributor with
And two level net circulating pump, distributor connection point supplies, return piping.
Adopt the knot that hot well can be, but not limited to straight well, horizontal well, deviated well, multilateral well or above-mentioned several design shapes
Close, can also be that-horizontal segment-goes out liquid vertical section by fluid injection vertical section and form, U-shaped pipe, vertical section and level are formed in underground
Section can be made of a plurality of parallel pipeline respectively.It is of the present invention to adopt hot well it is preferable that substantially L-shaped, including straight well section and
Horizontal segment；It is or generally U-shaped.Heretofore described straight well section be not it is proper along plumb line direction, generally
Gradient is construed as straight well in the range of 10 degree；Similar, horizontal segment is nor proper horizontal direction, and one
As gradient be construed as horizontal segment in the range of 10 degree.Transition between straight well section and horizontal segment can also have multiple shape
Formula, such as L-type, U-shaped etc. the requirement for all meeting the present invention.The horizontal segment for adopting hot well adds closing in target upper temperatures stratum
The heat exchange area and heat-exchange time of fluid in pipeline, the heat exchange power requirement to unit area have declined.
As it was previously stated, adopting hot well includes thermal energy capture segment, i.e. surrounding formation temperature reaches the well section of design temperature.Underground heat provides
Source according to temperature can be divided into high temperature, in gentle low temperature three classes.It is generally believed that temperature reach more than 90 degree (high temperatures) just can be into
Row power generation；If for greenhouse, heating, bathing etc., more than 60 degree (low temperature) just have utility value.Adopt hot well and mainly pass through thermal energy
Capture segment gathers thermal energy.Horizontal segment is generally exactly thermal energy capture segment, but the temperature of lower of straight well section also can be higher, also can
Play the role of part collection thermal energy, therefore also can be considered thermal energy capture segment.
Heat-exchange working medium in described sleeve pipe is injected into described sleeve pipe through the pipeline circulating system, and to dirty in interlayer
It is dynamic, in the central tube of the end sleeve pipe of interlayer.In the process, after especially into thermal energy capture segment, the heat exchange
Working medium is constantly heated by the underground heat reservori.Then heat-exchange working medium is flowed up along central tube is recycled to ground heat energy utilization dress
Put, exchange heat with closed heat exchanger.Central tube tube wall is double-layer vacuum structure, has extremely low thermal conductivity, to ensure quilt
Thermal losses is minimum when the working medium of heating reaches ground.Warmed-up heat-exchange working medium is admitted to ground thermal energy by pipeline circulating system
Using device, generated electricity or exchanged heat after exchanging heat with closed heat exchanger.With in closed heat exchanger heat transfer process, heat-exchange working medium
All the time circulated in closed system, therefore environmental pollution or the leakage of working medium will not be caused.After heat exchange, heat-exchange working medium is followed through pipeline
Loop system is returned in casing, re-starts above-mentioned circulation.
The utility model makes underground high temperature rock by the ingenious formation fracture formed using disused well by artificial recharge
Layer moisture content greatly improves, and artificially descends heat reservori so as to be formed, part or all by thermal energy capture segment wraps up.Such as
The measured underground high-temperature rock stratum porosity for finding disused well of fruit and permeability are low, stratum can be pressed by pressure break mode
Split, until forming chicken-wire cracking, that is, artificial heat reservori around thermal energy capture segment.High heat rock mass without pressure break, due to its low hole
Porosity, low-permeability characteristic, possess ability with good to the water in artificial heat reservori, it is low to ooze mistake rate.In artificial heat reservori
In water exist be lost in the case of, can suitably be supplemented into crack from fractured well.When artificial heat reservori operation after a certain period of time,
Since long-term water flooding cyclic chemical acts on, when porosity and permeability change, pressure break can be carried out again, to manually heat storage
Layer is transformed.In thermal energy acquisition system of the present invention, since the water in artificial heat reservori resides in rock stratum people all the time
In work Fracture Networks, serve as high-temperature stratum and adopt the medium of hot well wall high heat transfer.What is more important, due to the water of injection
It is deposited in always in artificial heat reservori, generates another heat exchange mechanism between High temperature rocks and the underground heat borehole wall, is i.e. water
Thermal convection current.Due to, there are temperature gradient, causing water density different, so as to exist by artificial crack between high heat rock mass and geothermal well
Lasting free convection is formed between rock and the underground heat borehole wall.According to an initial estimate, the heat transfer power ratio rock fever of free convection
One to two order of magnitude of conducted power height.The key of the technology of the present invention is the dynamic equilibrium of rock heat transfer and hydrothermal convection,
And system is rationally designed, the thermal power for making to reach ground by heat source maximizes.
In addition, the heat-collecting system in the utility model uses closed design, mass exchange is not carried out with underground environment, both
Overcome directly using geothermal water high energy consumption, need recharge, cause the shortcomings that ground thermal pollution and surface collapse, further through right
Waste petroleum well, the natural gas well, shale gas/oil well secondary use, make the heat source of hot-water heating system in oilfield exploitation, save
Production cost, make use of eco-friendly power source, reduces the use of non-renewable resources, enhance closed deeper subsurface heat exchange system
The heat exchange efficiency of system.The utility model takes heat with individual well, substantially can profit without separately boring a bite fractured well again adopting near hot well
With transformation of the discarded oil/gas well to surrounding formation and pressure break achievement, without by fractured well manufacture of intraocular geothermal reservoir, therefore build
If the system speed is fast, cost is small, and increases the success rate of geothermal reservoir transformation.
Brief description of the drawings
Fig. 1 is the schematic diagram of the heat source system by abandoned oil/gas well transformation of the utility model.
Fig. 2 is the enlarged diagram at A in Fig. 1.
Fig. 3 is the structure diagram of the utility model heat-exchange system.
Wherein：1 --- --- stratum 3 --- artificially descending heat reservori 4 --- adopts hot well to ground heat-energy utilizing device 2
41 --- --- --- --- pipe circle pump 8 --- aqueous geothermal layer 9 --- water of fractured layer 7 of central tube 6 of horizontal well 5
Mud 10 --- --- --- adopt hot well well head 13 --- level-one net circulating pump 14 --- to change steel sleeve 11 by vacuum heat-insulating layer 12
Hot --- --- --- distributor 18 --- heat user 19 --- level-one of two level net circulating pump 17 of water treatment facilities 16 of device 15
Net 20 --- two level net
Embodiment
The utility model is described in detail below with reference to specific embodiment.For the sake of clarity, do not specifically describe herein
Well known to a person skilled in the art component or structure.In addition, although the utility model is described with reference to specific embodiment, but
It is to be understood that the description is not intended as the utility model being limited to described embodiment.It can be wrapped on the contrary, the description is intended to covering
Include replacement, improvement and equivalent in the spirit and scope of the utility model being defined by the appended claims.
Illustrated below by taking waste petroleum well as an example, but the system may naturally be used for the two of other discarded oil/gas wells
Secondary utilization.
Fig. 1 is provided by the utility model by abandoned oil/heat source system schematic diagram of the gas well transformation for water flood recovery.
As shown in Figure 1, the system include adopt hot well 4, adopting hot well 4 has straight well and horizontal well 41, horizontal well depth about 3000 to 5000
Rice is deeper, is determined depending on Geothermal Conditions and required temperature.Certainly thermal process is adopted for realization, adopts hot well 4 and can be, but not limited to directly
The combination of well, horizontal well, deviated well, multilateral well or above-mentioned several design shapes.
Formed because adopting hot well 4 by the transformation of waste petroleum well, therefore the geothermal reservoir shape in Petroleum Production near meeting pressure break
Crack is reticulated, that is, forms fractured layer 6., can inside water filling after the formation of fractured layer 6 according to actual conditions, naturally it is also possible to
It is the suitable heat-conducting fluid material such as supercritical carbon dioxide, heat reservori 3 is artificially descended so as to be formed.Artificially descend heat reservori 3
The filling well cementation of cement 9 is injected between following steel sleeves 10.The fluid artificially descended in heat reservori 3 can flow naturally, by distance
The heat transfer of hot well 4 farther out is adopted to adopting near hot well 4.Because there is fine and close, fluid-tight characteristic in rock stratum, heat-exchange working medium is artificially
A constant hydrostatic level is maintained in lower heat reservori 3, other regions will not be leaked out under normal circumstances.
Adopt 4 pit shaft of hot well and shaft bottom is equipped with some temperature and pressure sensors, and can be by power carrier or other are wired
Or wireless transmission method return path signal monitors shaft bottom operating mode, understands borehole fluid flowing shape in real time to the calculating center on ground
State, measures and adopts hot well capacity, understands the temperature change of geothermal reservoir, carries out the dynamic analysis in underground heat exploitation.Temperature survey
The form of device includes but not limited to thermal resistance type, thermojunction type sensor.The form of device for pressure measurement includes but not limited to
Electronic pressure gauge, Optical fiber pressure manomete, silicon-on-sapphire pressure sensor.Adopt subordinate's steel sleeve 10, shell material in hot well 4 in edge
Can be that other thermal conductivity factors are high and corrosion-resistant material, the present embodiment are preferably steel sleeve.The end of steel sleeve 10 passes through weldering
The means closing such as connect, formed and closed adopts hot well.
Central tube 5 is installed in steel sleeve 10, gap is left between 10 inner wall of 5 outer wall of central tube and steel sleeve and forms folder
Layer, and supported with appropriate device.Gap between 10 inner wall of 5 outer wall of central tube and steel sleeve is marked with heat-exchange working medium, the present embodiment
Middle heat-exchange working medium is water.Interlayer by water from ground injection steel sleeve 10, and be allowed to flow downward by pipe circle pump 7.Folder
After water in layer is artificially descended heat reservori 3 to heat, enter by check valve in central tube 5, and flow upwards out ground along central tube
Face.The ground installation pipe circle pump 7 being connected with adopting hot well 4, injects steel bushing by heat-exchange working medium for producing power from ground
In pipe 10, and by through artificially descending the heated heat-exchange working medium of heat reservori 3 to flow out ground by the inner tube of filter into central tube 5
Face.
【Structure and workflow on heat exchange station】
Ground heat-energy utilizing device 1, which is arranged on, to be adopted near hot well well head 12, mainly including closed heat exchanger, passes through closing
Heat-exchange working medium after formula heat exchanger and heating carries out heat exchange to gather thermal energy.Specifically, mainly coagulation net 19 is included
With two stage treatment net 20.The level-one net 19 includes：Level-one net pipe circle pump 13, the central tube 5 with adopting hot well steel sleeve 10
It is connected, exchanges heat for heated heat-exchange working medium to be sent in heat exchanger 14.Level-one net water treatment facilities 15 and level-one
Net 19 is connected, and for squeezing into softened water in level-one net system when level-one 19 water shortage of net, keeps system pressure constant.
Two level net 20 is the pipe network produced for oil field used in hot water.Secondary network includes distributor 17, and distributor 17 connects
Divide confession, return piping；And two level net circulating pump.The high-temperature water that level-one net pipe circle pump 13 is sent into is carried out into heat exchanger 14
Exchange heat (being heated to oil field industrial water), the oil field industrial water after heating provides power through two level net circulating pump 16 and send
Enter distributor 17,17 feed pipe of distributor is connected to oilfield producing well water station 18, by being distributed with water station 18 to each producing well.Distribution
17 return pipe of device is used to return in the cold water after the oily separating treatment of producing well collection carries out cycle heat exchange with heat exchanger 14.It is above-mentioned to follow
Ring process provides power by two level net circulating pump 16, and the high-temperature water after heat exchanger 14 is heated is sent into the water supply of distributor 17
Pipe, and the water at low temperature after the oily separating treatment of producing well collection is re-started into heating back to heat exchanger 14.I and II pipe network follows
Ring and pump control can be manual or intelligent controls.
Above by abandoned well transformation for water flood recovery heat source system exemplified by illustrate the utility model by discarding
Heat source system an example of the oil/gas well transformation for water flood recovery, but should be by abandoned oil/heat source of the gas well transformation for water flood recovery
System is clearly not limited thereto, such as can be used for transforming the natural gas well, shale gas/oil well etc..
Claims (6)
1. a set of deep geothermal heat energy collection and utilization system, including：
Hot well is adopted, hot well is adopted and is formed by waste petroleum well, the natural gas well, shale gas/oil well transformation, adopt hot well and gathered including thermal energy
Section, the thermal energy capture segment for adopting hot well are located at deeper subsurface high-temperature rock stratum, and part or all of thermal energy capture segment is by underground high temperature
Rock stratum chicken-wire cracking parcel, chicken-wire cracking is naturally occurred by the rock mass of high porosity, high permeability, or oil-gas mining process
Middle artificial fracturing is formed；
Closed sleeve pipe, along hot well setting is adopted, the closed sleeve pipe is coaxitron, interior to be equipped with interlayer, the end of interlayer and set
Connected between the central tube of pipe, heat-exchange working medium is marked with casing, central tube is double-layer vacuum structure；
Pipeline circulating system；
Ground heat-energy utilizing device, including closed heat exchanger, heat-exchange working medium outflow central tube and the closing by heating
Formula heat exchanger carries out heat exchange, and heat-exchange working medium enters the interlayer of closed sleeve pipe after heat exchange.
2. deep geothermal heat energy collection and utilization system according to claim 1, described to adopt hot well directly by under discarded oil/gas well
Enter enclosed circulation pipeline to form, or according to temperature requirement to be deepened or increased horizontal segment, well bore to discarded oil/gas well big
Cause L-shaped.
3. deep geothermal heat energy collection and utilization system according to claim 1, the ground heat-energy utilizing device passes through pipe network
It is connected with oilfield producing well with water station.
4. deep geothermal heat energy collection and utilization system according to claim 3, the ground heat-energy utilizing device includes level-one
Handle net and two stage treatment net；The coagulation net includes：Coagulation net pipe circle pump and closed heat exchanger and
Coagulation net water treatment facilities, circulating pump are connected with adopting the central tube of hot well steel sleeve, and the closed heat exchanger is with following
The heat-exchange working medium that ring is pumped into carries out heat exchange；Coagulation net water treatment facilities are connected with coagulation net；Two stage treatment
Net is the pipe network for oil field industrial water, is used by the production in the closed heat exchanger in coagulation net and two stage treatment net
Water carries out heat exchange.
5. deep geothermal heat energy collection and utilization system according to claim 4, the two stage treatment net include distributor and
Two stage treatment net circulating pump, distributor connection point supplies, return piping.
6. deep geothermal heat energy collection and utilization system according to claim 1 or 2, the hot well of adopting is transformed by waste petroleum well
Form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721148134.3U CN207230982U (en) | 2017-09-08 | 2017-09-08 | By abandoned oil/heat source system of the gas well transformation for water flood recovery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721148134.3U CN207230982U (en) | 2017-09-08 | 2017-09-08 | By abandoned oil/heat source system of the gas well transformation for water flood recovery |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109882133A (en) * | 2019-03-06 | 2019-06-14 | 大连理工大学 | A kind of device and method using discarded high temperature and pressure gas reservoir exploitation gas hydrates |
| CN110657594A (en) * | 2019-10-08 | 2020-01-07 | 刘联军 | Closed circulation deep geothermal energy exploitation system |
| WO2020143066A1 (en) * | 2019-01-12 | 2020-07-16 | 力软科技(美国)有限责任公司 | Geothermal exploitation system and construction method therefor |
| CN111609576A (en) * | 2020-06-12 | 2020-09-01 | 东北石油大学 | Device for realizing synchronous exploitation and recharge of geothermal water by utilizing waste oil well |
| CN111623401A (en) * | 2020-06-12 | 2020-09-04 | 东北石油大学 | Heating system for exploiting terrestrial heat by combining waste oil well with heat pump |
| CN111664601A (en) * | 2020-05-14 | 2020-09-15 | 广东中科光年数智科技有限公司 | Deep geothermal well structure and modification method of waste geothermal well |
| CN112197447A (en) * | 2020-10-28 | 2021-01-08 | 王平 | Oil well heat energy recycling system |
| CN112555108A (en) * | 2020-12-17 | 2021-03-26 | 中国能源建设集团山西省电力勘测设计院有限公司 | Simple heat taking method for efficiently and cleanly utilizing geothermal heat energy |
| TWI768278B (en) * | 2020-01-08 | 2022-06-21 | 陳俊雄 | Heat extraction device and power generation sysyem |
| CN116164438A (en) * | 2022-12-05 | 2023-05-26 | 中国地质大学（武汉） | CO 2 Waste well coaxial closed-loop ground source heat pump system for working fluid |
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2017
- 2017-09-08 CN CN201721148134.3U patent/CN207230982U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020143066A1 (en) * | 2019-01-12 | 2020-07-16 | 力软科技(美国)有限责任公司 | Geothermal exploitation system and construction method therefor |
| US12000626B2 (en) | 2019-01-12 | 2024-06-04 | Mechsoft Technology (U.S.A.) Co., Llc | Geothermal development system and the construction method thereof |
| CN109882133A (en) * | 2019-03-06 | 2019-06-14 | 大连理工大学 | A kind of device and method using discarded high temperature and pressure gas reservoir exploitation gas hydrates |
| CN110657594A (en) * | 2019-10-08 | 2020-01-07 | 刘联军 | Closed circulation deep geothermal energy exploitation system |
| TWI768278B (en) * | 2020-01-08 | 2022-06-21 | 陳俊雄 | Heat extraction device and power generation sysyem |
| CN111664601A (en) * | 2020-05-14 | 2020-09-15 | 广东中科光年数智科技有限公司 | Deep geothermal well structure and modification method of waste geothermal well |
| CN111609576A (en) * | 2020-06-12 | 2020-09-01 | 东北石油大学 | Device for realizing synchronous exploitation and recharge of geothermal water by utilizing waste oil well |
| CN111623401A (en) * | 2020-06-12 | 2020-09-04 | 东北石油大学 | Heating system for exploiting terrestrial heat by combining waste oil well with heat pump |
| CN112197447A (en) * | 2020-10-28 | 2021-01-08 | 王平 | Oil well heat energy recycling system |
| CN112555108A (en) * | 2020-12-17 | 2021-03-26 | 中国能源建设集团山西省电力勘测设计院有限公司 | Simple heat taking method for efficiently and cleanly utilizing geothermal heat energy |
| CN112555108B (en) * | 2020-12-17 | 2024-02-27 | 中国能源建设集团山西省电力勘测设计院有限公司 | Simple heat-taking method for efficiently and cleanly utilizing geothermal heat energy |
| CN116164438A (en) * | 2022-12-05 | 2023-05-26 | 中国地质大学（武汉） | CO 2 Waste well coaxial closed-loop ground source heat pump system for working fluid |
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