CN107013199A - A kind of spontaneous mixed phase hot fluid huff and puff oil recovery method in underground - Google Patents
A kind of spontaneous mixed phase hot fluid huff and puff oil recovery method in underground Download PDFInfo
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- CN107013199A CN107013199A CN201710435296.3A CN201710435296A CN107013199A CN 107013199 A CN107013199 A CN 107013199A CN 201710435296 A CN201710435296 A CN 201710435296A CN 107013199 A CN107013199 A CN 107013199A
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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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/243—Combustion in situ
Abstract
A kind of spontaneous mixed phase hot fluid huff and puff oil recovery method in underground, the present invention relates to oil extraction in oil field technical field.Methods described includes：Well of handling up target carries out completion practice, after completion underground mixed phase heated fluid generator and supporting ground feed system are arranged to underground, downhole production mixed phase hot fluid simultaneously injects oil reservoir, and injection rate reaches vexed well after preset range, and closed time, which reaches, carries out oil producing operation after preset range；This method carries out huff and puff oil recovery by injecting mixed phase hot fluid to oil reservoir, carbon dioxide and high-temperature steam in mixed phase hot fluid can be modified to crude oil, heavy, colloid, the content of asphalitine in crude oil are reduced, plays a part of reduction viscosity of crude, increase its mobility, make it easier for being plucked out of；This method can apply to viscous crude, the super-heavy oil deposit primary oil recovery for being difficult to employ, and can also be used as viscous crude, super-heavy oil deposit tertiary oil recovery.
Description
Technical field
The present invention relates to oil extraction in oil field technical field, more particularly to a kind of spontaneous mixed phase hot fluid huff and puff oil recovery side in underground
Method.
Background technology
Viscous crude is exactly high, the relatively denser crude oil of viscosity, and the country is named " viscous crude ", and foreign countries are named " heavy oil ".Due to its flowing
It poor performance, can not even be flowed under reservoir condition, thus using conventional recovery method be difficult cost-effectively to develop.From 20 generation
Record and just start, oil recovery by heating has been increasingly becoming the effective ways for exploiting this quasi-oil.Viscous crude has a very wide distribution, and has huge due to containing
Big viscous crude stock number and paid attention to by each oil-producing country of the world, with the development of heating exploitation technology, exploitation scale is progressively expanding
Greatly, yield is constantly increasing, and heavy crude heat extraction has occupied more important position in the oil industry.
Colloid and bitumen content are higher in viscous crude, light fraction seldom, as colloid increases with bitumen content, viscous crude it is close
Degree also increases with viscosity.It is viscous based on viscous crude but the viscosity temperature of viscous crude is extremely sensitive, increases with temperature, and viscosity drastically declines
The strong sensitivity characteristic to temperature is spent, oil recovery by heating method is typically considered the maximally effective means of production of heavy oil reservoir, and China is big
Part oil field obtains good economic benefit with steam soak mode heavy crude producing, but under the conditions of steam injection, viscosity of thickened oil declines
Simply temporary transient, with the thermal loss in injection and recovery process, temperature drop, viscosity of thickened oil gradually gos up, and is lifted to pit shaft
Rise and terrestrial techniques bring a series of difficulties；Combustion in situ method, can pass through the heavys such as the colloid in the viscous crude that burns, asphalitine
Composition, produces high-temperature flue gas, to be dissolved in viscous crude, viscous crude is modified, viscosity reduction, but combustion in situ field conduct process
In, injection gas is difficult to control to, the problems such as easily causing has channeling, live wire branch inequality, and is difficult to adjust operation.
In view of the above-mentioned problems, the present invention proposes a kind of spontaneous mixed phase hot fluid huff and puff oil recovery method in underground, relative steam is gulped down
Method is told, viscosity reducing effect is more notable, reduce the difficulty of wellbore lift and Ground Operation, with respect to combustion in situ oil production method, sheet
Invention is easier to manipulation, more flexibly.
The content of the invention
The embodiment of the present invention provides a kind of spontaneous mixed phase hot fluid huff and puff oil recovery method in underground, and well of handling up first target enters
Underground mixed phase heated fluid generator and its supporting ground system are arranged to underground after row completion practice, completion, passes through ground system
Oxidant, fuel and water are fed to underground mixed phase heated fluid generator and carries out mixed phase burning, are generated mixed phase hot fluid and are injected oil
Layer, vexed well after mixed phase hot fluid injection rate reaches preset range, closed time reaches progress oil flow production work after preset range
Industry.
This method is by carrying out carbon dioxide and height in huff and puff oil recovery, mixed phase hot fluid to oil reservoir injection mixed phase hot fluid
Warm steam can be modified to crude oil, reduce heavy, colloid, the content of asphalitine in crude oil, played reduction viscosity of crude, increased
Plus the effect of its mobility, make it easier for being plucked out of；This method can apply to viscous crude, the super-heavy oil deposit one for being difficult to employ
It is secondary to recover the oil, by handling up for some rounds, injection well and the connectedness of producing well can be effectively increased；Can also be as viscous crude, super
Heavy crude reservoir tertiary oil recovery, to passing through the oil well after many wheel steam soaks, this method can make script steam be difficult to what is employed
Residual oil increases mobility, can be used as many wheel steamHuff puff oil wells later stage oil production methods.
To achieve these goals, the embodiment of the present invention provides a kind of spontaneous mixed phase hot fluid huff and puff oil recovery method in underground,
Well of handling up first target carries out completion practice；Stimulation work is carried out after completion practice, stimulation work includes underground work and ground
Face operation, wherein the underground work includes：To the target handle up well arrangement underground mixed phase heated fluid generator, wherein described
Ground Operation includes：Arrange the supporting ground system of underground mixed phase heated fluid generator；Sent out by ground system to underground hot fluid
Raw device feeds oxidant, fuel and water and carries out underground generation mixed phase hot fluid and inject oil reservoir, when mixed phase hot fluid injection rate reaches
Vexed well after to preset range；Closed time, which reaches, carries out oil producing operation after preset range.
The completion practice includes adding grout off layer between sleeve outer wall and stratum, and sleeve pipe selects API cannula series
In H levels, K grades or J grades, 100-300 meters of the grout off floor height, positioned at oil reservoir top, in the well people that handles up during completion
Work shaft bottom adds injection protective layer；The injection protective layer is that the smooth high temperature resistant stainless steel body in surface is constituted, and is tubbiness, thickness 5-
10 millimeters, 1-3 meters of height plays and protects artificial bottom of a well not by mixed phase hot fluid corrosiveness.
Described stimulation work includes underground work and Ground Operation：
The underground work includes：Mixed phase heated fluid generator, packer, feeding pipe under lower going-into-well, the well successively
Lower mixed phase heated fluid generator depth of setting be 5-10 meter of oil reservoir top at, and to the packer progress seal；Wherein, it is described
Feeding pipe includes fuel feed pipe line, cooling water supply pipeline, oxidant supply pipeline and supply cable；Wherein, the well
Lower mixed phase heated fluid generator is by top connection component, fuel assembly, vaporization component, spiral boosting component and ejection assemblies group
Into；Feeding pipe is connected through packer with top connection component.
The Ground Operation includes：Connect ground supply system and underground mixed phase heated fluid generator, described ground system
System includes oxidant feed system, fuel feed system, cooling water supply system, electric ignition system and monitoring system, the oxygen
Agent feed system provides work pressure for feeding the underground mixed phase heated fluid generator after oxidant is dried, filtered
Power；The fuel feed system is used to fuel feeding the underground mixed phase heated fluid generator, and provides operating pressure；It is described
Cooling water supply system is used to that the underground mixed phase heated fluid generator will to be fed after different types of water filtration, softening, and carries
For operating pressure；The electric ignition system is used to carry out electric ignition operation to the underground mixed phase heated fluid generator, makes above-mentioned
Oxidant, fuel and water form mixed phase burning in the mixed phase heated fluid generator of underground；The monitoring system is used to monitor in real time
The oxidant feed system, fuel feed system, cooling water supply system, electric ignition system and underground mixed phase hot fluid occur
The specific works parameter that produces when device works, and during oil flow production produced gas gas component, such as hydrogen sulfide, oxygen, dioxy
Change carbon content, and then judge oil recovery situation and underground mixed phase heated fluid generator internal-combustion quality in oil reservoir, and can pass through
Monitoring system realizes remote control operation.
The preset range of the mixed phase hot fluid injection rate includes：Described preset range enters for the mixed phase hot fluid
Near wellbore zone 5-20 meters of scope, after the preset range is reached, closes feed system and production tree valve carries out vexed well, described
Closed time scope is 7-15 days, then mixed phase hot fluid carries out viscosity reduction reaction with formation crude oil during this, increases near wellbore zone
Viscous crude mobility.
The oil producing operation includes：Oil flow production is carried out after vexed well, by adjusting Produced Liquid discharge capacity, keeps flowing bottomhole pressure (FBHP)
Produced between 2-4Mpa, to ensure that Produced Liquid temperature is no more than 100 DEG C, the heat in mixed phase hot fluid is obtained abundant profit
With blowing terminates rear tripping in oil-well pump untill economic benefit is not reached.
The beneficial effect of the embodiment of the present invention is：1) present invention is sent out by ground corollary system to underground mixed phase hot fluid
Raw device provides oxidant, fuel and water, and mixed phase burning generation high-temperature steam and carbon dioxide are formed in underground, and injects oil therewith
Layer in, carbon dioxide and high-temperature steam in mixed phase hot fluid can be modified to crude oil, reduction crude oil in heavy, colloid,
The content of asphalitine, plays a part of reduction viscosity of crude, increases its mobility, make it easier for being plucked out of；2) relative to ground
Face burning manufacture steam, oil recovery underground combustion of the present invention, combustion product is directly injected into stratum, and zero-emission is environmentally safe；
3) to compare combustion in situ application more flexible for this method, is suitable for the oil reservoir of different geological conditions, and can be with oil recovery process
Stop note at any time and be adjusted measure operation, and combustion in situ oil production method stops recovery gas injection after gas injection and needs to re-start underground
Ignition operation；4) the inventive method can be used for many wheel steamHuff puff oil wells, the residual oil employed can be difficult to script steam
Increase its mobility, make the invalid well increase recovery ratio of script steam soak.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, makes required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those skilled in the art, it can also be obtained on the premise of not paying creative work according to these accompanying drawings other attached
Figure.
Fig. 1 is a kind of spontaneous mixed phase hot fluid huff and puff oil recovery method schematic flow sheet in underground.
Fig. 2 is completion schematic diagram.
Fig. 3 is that underground mixed phase hot fluid arranges schematic diagram.
Fig. 4 is that ground system arranges schematic diagram.
Drawing reference numeral：1st, sleeve pipe 2, grout off layer 3, oil reservoir 4, artificial bottom of a well 5, injection protective layer 6, oxidant
Supply pipeline 7, fuel feed pipe line 8, cooling water supply pipeline 9, supply cable 10, ground supply arrangement for connecting system
11st, top connection component 12, fuel assembly 13, vaporization component 14, spiral boosting component 15, ejection assemblies 16, packer
17th, oxidant supply system 18, fuel system 19, chilled(cooling) water supply (CWS) system 20, monitoring system 21, electric ignition system
22nd, production tree.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on this
Embodiment in invention, the every other reality that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example is applied, the scope of protection of the invention is belonged to.
The embodiments of the invention provide a kind of spontaneous mixed phase hot fluid huff and puff oil recovery method in underground, methods described includes as follows
Step：
Step one, well of handling up target carries out completion practice, as shown in Fig. 2 adding cement between the outer wall of sleeve pipe 1 and stratum
Plugged zone 2, the grout off layer 2 is high 100-300 meters, positioned at oil reservoir top, adds during completion in the well artificial bottom of a well 4 of handling up
If spraying protective layer 5；It is that the smooth high temperature resistant stainless steel body in surface is constituted to spray protective layer 5, is tubbiness, and 5-10 millimeters of thickness is high
1-3 meters of degree, plays and protects artificial bottom of a well 4 not by mixed phase hot fluid corrosiveness.
Step 2：Stimulation work, stimulation work includes underground work and Ground Operation：
Wherein described underground work includes：Mixed phase heated fluid generator, packer, feeding pipe under lower going-into-well successively, and
The packer is carried out to seal, as shown in figure 3, underground mixed phase heated fluid generator is made up of 5 parts, is respectively：Top connects
Connected components 11, fuel assembly 12, vaporization component 13, spiral boosting component 14, ejection assemblies 15；The underground mixed phase hot fluid hair
Raw device depth of setting is that at 5-10 meters of oil reservoir top, feeding pipe passes through ground supply system with underground mixed phase heated fluid generator
Attachment means 10 are connected；
The Ground Operation includes connection ground supply system and underground mixed phase heated fluid generator, as shown in figure 4, described
Ground system include oxidant feed system 17, fuel feed system 18, cooling water supply system 19, monitoring system 20 and electricity
Ignition system 21；The ground system is connected by production tree 22 with feeding pipe.
Step 3, oxidant, fuel and water are injected by ground system to underground, and mixed phase burning is completed in underground, and raw
Into mixed phase hot fluid, it is subsequently injected into oil reservoir, the bottom of spiral boosting component 14 dress in the mixed phase heated fluid generator part of underground
Provided with unidirectional pressure charging valve, it can effectively prevent from producing overflow phenomena in well during injection process and vexed well.Inject mixed phase hot-fluid
In body, high-temperature steam injection rate is daily 20-300 tons, and carbon dioxide injection amount is daily 3-40 tons.
Step 4, closes oxidant supply system, fuel system, water supply system, closes production tree inlet valve,
Carry out vexed well operations.
Carry out oil flow production after step 5, vexed well, by adjusting Produced Liquid discharge capacity, make flowing bottomhole pressure (FBHP) keep 2-4Mpa between
Produced, to ensure that Produced Liquid temperature is no more than 100 DEG C, the heat in mixed phase hot fluid is fully used, blowing knot
Tripping in oil-well pump is not untill economic benefit is reached after beam.
Fig. 1 is the method overall flow figure of the embodiment of the present invention, as shown in figure 1, this method includes：
101st, well of handling up target carries out completion
102nd, well of handling up target carries out stimulation work
103rd, oxidant, fuel and water are injected to underground by ground system, mixed phase burning in underground generates mixed phase hot fluid
Oil reservoir is injected, injection rate reaches vexed well after preset range
104th, closed time is reached after preset range, when bottom pressure is more than original formation pressure, carries out oil flow production
105th, after blowing terminates or when bottom pressure is less than original formation pressure, tripping in oil well pump carries out oil pumping operation
Wherein 103 can include：The oxidant of ground system supply is one kind in air, oxygen rich gas, Poor oxygen gas.
Wherein 103 can also include：Ground system supply fuel for natural gas, gasoline, diesel oil, methane, hydrogen or its
One kind in his fuel.
Wherein 103 can also include：Ground system supply water for distilled water, softened water, filter water or other do not produce
One kind in the water of incrustation scale.
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Embodiment 1：
Certain oil field a bite water injection well, 1700 meters of reservoir depth, 50 degrees Celsius of reservoir temperature, 22 meters of core intersection, crude oil glues
44000 mpas are spent, 17.5 MPas of original formation pressure had carried out water-drive oil recovery, but water injection pressure is big, and water injection rate is small,
Available reserves is smaller in oil reservoir, current 33 MPas of water injection pressure, and water injection rate is 5 cubic metres/day, and current recovery ratio is 2%, right
This oil well carries out the first round and handled up production.
The first step：Well of handling up target carries out completion practice, the K levels selected refering to Fig. 2, sleeve pipe in API cannula series, set
Pipe diameter is 7 inches, the mudding that added water between sleeve outer wall and stratum blocking layer, and grout off layer height is 100 meters；Spray protective layer
Material is high temperature resistant stainless steel, and thickness is 10 millimeters, is highly 1 meter.
Second step：Stimulation work, stimulation work includes underground work and Ground Operation：
Underground work includes：Mixed phase heated fluid generator, packer, feeding pipe under lower going-into-well, and to the envelope successively
Carry out sealing every device, be mixed phase heated fluid generator arrangement schematic diagram under Horizontal Well refering to Fig. 3；The underground mixed phase hot-fluid
Body generator depth of setting is at 5 meters of oil reservoir top；
The Ground Operation includes connection ground supply system and underground mixed phase heated fluid generator, described refering to Fig. 4
Ground system includes oxidant feed system, fuel feed system, water supply system, electric ignition system and monitoring system；By ground
Face feed system is connected by production tree with feeding pipe.
3rd step：Oxidant, fuel and water are injected to underground by ground system, mixed phase burning generation is completed in underground mixed
Phase hot fluid, and inject in oil reservoir, in injection mixed phase hot fluid, high-temperature steam amount is daily 30 tons, and amount of carbon dioxide is daily 5
Ton, injection length is 5 days, and injection scope is 5 meters of near wellbore zone.
4th step：Oxidant supply system, fuel system, water supply system are closed, production tree inlet valve is closed,
Carry out vexed well operations, vexed well 7 days.
5th step：20 MPas of strata pressure is observed after vexed well, open flow operation is carried out, open flow continues 20 days, and the open flow stage goes out
700 tons of liquid measure, moisture content 10%.
6th step：Tripping in oil well pump is recovered the oil in well, and oil recovery continues 30 days, 480 tons of stage liquid outlet quantity of recovering the oil, aqueous
Rate 15%.
7th step：Second step is repeated to the 6th step, final handle up 7 times, total 7300 tons of liquid outlet quantity, total moisture content
20%.
Embodiment 2：
One, certain oil field block, 2200 meters of reservoir depth, 70 degrees Celsius of reservoir temperature, 20 meters of core intersection, viscosity of crude
75000 mpas, 19 MPas of original formation pressure, because oil viscosity is larger, crude oil does not possess mobility, mesh in underground
Preceding exploitation belongs to primary oil recovery.
The first step：Well of handling up target carries out completion practice, the J levels selected refering to Fig. 2, sleeve pipe in API cannula series, set
Pipe diameter is 8-5/8 inches, the mudding that added water between sleeve outer wall and stratum blocking layer, and grout off layer height is 300 meters；Injection is protected
Sheath material is high temperature resistant stainless steel, and thickness is 7 millimeters, is highly 2 meters.
Second step：Stimulation work, stimulation work includes underground work and Ground Operation：
Underground work includes：Mixed phase heated fluid generator, packer, feeding pipe under lower going-into-well, and to the envelope successively
Carry out sealing every device, be mixed phase heated fluid generator arrangement schematic diagram under Horizontal Well refering to Fig. 3；The underground mixed phase hot-fluid
Body generator depth of setting is at 10 meters of oil reservoir top；
The Ground Operation includes connection ground supply system and underground mixed phase heated fluid generator, described refering to Fig. 4
Ground system includes oxidant feed system, fuel feed system, water supply system, electric ignition system and monitoring system；By ground
Face feed system is connected by production tree with feeding pipe.
3rd step：Oxidant, fuel and water are injected to underground by ground system, mixed phase burning generation is completed in underground mixed
Phase hot fluid, and inject in oil reservoir, in injection mixed phase hot fluid, high-temperature steam amount is daily 25 tons, and amount of carbon dioxide is daily 4
Ton, injection length is 7 days, and injection scope is 10 meters of near wellbore zone.
4th step：Oxidant supply system, fuel system, water supply system are closed, production tree inlet valve is closed,
Carry out vexed well operations, vexed well 10 days.
5th step：20 MPas of strata pressure is observed after vexed well, open flow operation is carried out, open flow continues 15 days, and the open flow stage goes out
530 tons of liquid measure, moisture content 10%.
6th step：Tripping in oil well pump is recovered the oil in well, and oil recovery continues 30 days, 620 tons of stage liquid outlet quantity of recovering the oil, aqueous
Rate 6%.
7th step：Second step is repeated to the 6th step, final handle up 6 times, total 3500 tons of liquid outlet quantity, total moisture content
11%.
Embodiment 3：
One, certain oil field block, 1400 meters of reservoir depth, 55 degrees Celsius of reservoir temperature, 13 meters of core intersection, viscosity of crude
23000 mpas, 12 MPas of original formation pressure.Steam soak was carried out 6 times, and had added up injection 11000 tons of saturations of steam and steam
Vapour, current recovery ratio is 42.6%.
The first step：Well of handling up target carries out completion practice, the J levels selected refering to Fig. 2, sleeve pipe in API cannula series, set
Pipe diameter is 7 inches, the mudding that added water between sleeve outer wall and stratum blocking layer, and grout off layer height is 230 meters；Spray protective layer
Material is high temperature resistant stainless steel, and thickness is 5 millimeters, is highly 3 meters.
Second step：Stimulation work, stimulation work includes underground work and Ground Operation：
Underground work includes：Mixed phase heated fluid generator, packer, feeding pipe under lower going-into-well, and to the envelope successively
Carry out sealing every device, be mixed phase heated fluid generator arrangement schematic diagram under Horizontal Well refering to Fig. 3；The underground mixed phase hot-fluid
Body generator depth of setting is at 5 meters of oil reservoir top；
The Ground Operation includes connection ground supply system and underground mixed phase heated fluid generator, described refering to Fig. 4
Ground system includes oxidant feed system, fuel feed system, water supply system, electric ignition system and monitoring system；By ground
Face feed system is connected by production tree with feeding pipe.
3rd step：Oxidant, fuel and water are injected to underground by ground system, mixed phase burning generation is completed in underground mixed
Phase hot fluid, and inject in oil reservoir, in injection mixed phase hot fluid, high-temperature steam amount is daily 140 tons, and amount of carbon dioxide is daily
30 tons, injection length 10 days, injection scope is 20 meters of near wellbore zone.
4th step：Oxidant supply system, fuel system, water supply system are closed, production tree inlet valve is closed,
Carry out vexed well operations, vexed well 15 days.
5th step：20 MPas of strata pressure is observed after vexed well, open flow operation is carried out, open flow continues 7 days, and the open flow stage goes out liquid
1150 tons of amount, moisture content 80%.
6th step：Tripping in oil well pump is recovered the oil in well, and oil recovery continues 15 days, 980 tons of stage liquid outlet quantity of recovering the oil, aqueous
Rate 90%.
7th step：Second step is repeated to the 6th step, final handle up 4 times, total 6700 tons of liquid outlet quantity, total moisture content
75%.
Above example is only to the technical scheme for illustrating the embodiment of the present invention, rather than its limitations；Although with reference to foregoing
The embodiment of the present invention is described in detail embodiment, it will be understood by those within the art that：It still can be with
Technical scheme described in foregoing embodiments is modified, or equivalent substitution is carried out to which part technical characteristic；And
These modifications are replaced, and the essence of appropriate technical solution is departed from the essence of each embodiment technical scheme of the embodiment of the present invention
God and scope.Above embodiment is to illustrate the invention and not to limit the present invention.
Claims (10)
1. a kind of spontaneous mixed phase hot fluid huff and puff oil recovery method in underground, it is characterised in that methods described includes：
Well of handling up first target carries out completion practice, and
Stimulation work, including underground work and Ground Operation are carried out after above-mentioned completion practice；Wherein described underground work includes：To
The target handle up well arrangement underground mixed phase heated fluid generator；Wherein described Ground Operation includes：Arrange underground mixed phase hot-fluid
The supporting ground feed system of body generator, and
Oxidant, fuel and water are fed to underground mixed phase heated fluid generator by ground supply system, mixed phase is generated in underground
Hot fluid simultaneously injects oil reservoir, vexed well after mixed phase hot fluid injection rate reaches preset range, and
Closed time reaches progress oil flow production operation after preset range.
2. a kind of spontaneous mixed phase hot fluid huff and puff oil recovery method in underground as claimed in claim 1, it is characterised in that the completion
Operation, which is included between sleeve outer wall and stratum, adds grout off layer, 100-300 meters of the grout off floor height, positioned at oil reservoir
Top, and add injection protective layer in the well artificial bottom of a well of handling up.
3. a kind of spontaneous mixed phase hot fluid huff and puff oil recovery method in underground as claimed in claim 2, it is characterised in that the injection
Protective layer is that the smooth high temperature resistant stainless steel body in surface is constituted, and is tubbiness, and 5-10 millimeters of thickness, 1-3 meters of height plays protection artificial
Shaft bottom is not by mixed phase hot fluid corrosiveness.
4. a kind of spontaneous mixed phase hot fluid huff and puff oil recovery method in underground as claimed in claim 1, it is characterised in that the underground
Operation includes：Mixed phase heated fluid generator, packer, feeding pipe under lower going-into-well successively, the underground mixed phase hot fluid occur
Device depth of setting be 5-10 meter of oil reservoir top at, and to the packer progress seal.
5. a kind of spontaneous mixed phase hot fluid huff and puff oil recovery method in underground as claimed in claim 4, it is characterised in that the supply
Pipeline includes fuel feed pipe line, cooling water supply pipeline, oxidant supply pipeline and supply cable.
6. a kind of spontaneous mixed phase hot fluid huff and puff oil recovery method in underground as claimed in claim 4, it is characterised in that the underground
Mixed phase heated fluid generator is made up of top connection component, fuel assembly, vaporization component, spiral boosting component and ejection assemblies.
7. a kind of spontaneous mixed phase hot fluid huff and puff oil recovery method in underground as claimed in claim 1, it is characterised in that the ground
Operation includes connection ground supply system and underground mixed phase heated fluid generator, and described ground supply system is supplied including oxidant
To system, fuel feed system, cooling water supply system, electric ignition system and monitoring system.
8. a kind of spontaneous mixed phase hot fluid huff and puff oil recovery method in underground as claimed in claim 1, it is characterised in that the underground
Generation mixed phase hot fluid includes, and oxidant, fuel and water are injected to underground by ground supply system, and mixed phase combustion is completed in underground
Burn, and generate mixed phase hot fluid, be subsequently injected into oil reservoir.
9. a kind of spontaneous mixed phase hot fluid huff and puff oil recovery method in underground as claimed in claim 1, it is characterised in that the mixed phase
Hot fluid injection oil reservoir preset range is near wellbore zone 5-20 meters.
10. a kind of spontaneous mixed phase hot fluid huff and puff oil recovery method in underground as claimed in claim 1, it is characterised in that described
Oil producing operation includes, and open flow oil recovery is carried out after vexed well, by adjusting Produced Liquid discharge capacity, flowing bottomhole pressure (FBHP) is kept in the range of 2-4Mpa
Produced.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110043235A (en) * | 2019-05-23 | 2019-07-23 | 西南石油大学 | A kind of thick oil filling vaporization method burnt using underground supercritical water |
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| CN106593377A (en) * | 2016-12-19 | 2017-04-26 | 中国石油天然气股份有限公司 | Steam flooding starting method for super-heavy oil horizontal wells |
| CN106801598A (en) * | 2017-03-31 | 2017-06-06 | 邓晓亮 | Burn mixed phase superheated steam device and method processed for underground |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110043235A (en) * | 2019-05-23 | 2019-07-23 | 西南石油大学 | A kind of thick oil filling vaporization method burnt using underground supercritical water |
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