CN103867172B - Injection-production system and injection-production method - Google Patents
Injection-production system and injection-production method Download PDFInfo
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- CN103867172B CN103867172B CN201410052124.4A CN201410052124A CN103867172B CN 103867172 B CN103867172 B CN 103867172B CN 201410052124 A CN201410052124 A CN 201410052124A CN 103867172 B CN103867172 B CN 103867172B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 51
- 238000002347 injection Methods 0.000 claims abstract description 140
- 239000007924 injection Substances 0.000 claims abstract description 140
- 241000252254 Catostomidae Species 0.000 claims abstract description 5
- 239000003921 oil Substances 0.000 claims description 48
- 238000000605 extraction Methods 0.000 claims description 32
- 239000012530 fluid Substances 0.000 claims description 29
- 230000000694 effects Effects 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000010793 Steam injection (oil industry) Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 9
- 239000010779 crude oil Substances 0.000 claims description 8
- 238000005065 mining Methods 0.000 claims description 8
- 241000196324 Embryophyta Species 0.000 claims description 6
- 210000003128 Head Anatomy 0.000 claims description 5
- 210000003284 Horns Anatomy 0.000 claims description 5
- 230000002265 prevention Effects 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000005755 formation reaction Methods 0.000 claims description 3
- 210000003437 Trachea Anatomy 0.000 claims 1
- 238000007789 sealing Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 46
- 210000001736 Capillaries Anatomy 0.000 description 12
- 238000002485 combustion reaction Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- 230000000240 adjuvant Effects 0.000 description 2
- 239000002671 adjuvant Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 240000002444 Sphenoclea zeylanica Species 0.000 description 1
- 230000001174 ascending Effects 0.000 description 1
- 235000012970 cakes Nutrition 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
The invention discloses an injection-production system and an injection-production method, aiming to solve the problem that a pipe column in a production well is difficult to lift during subsequent well repairing operation of the injection-production system in the prior art. In the injection-production system provided by the invention, a monitoring pipe column and a production pipe column which are independent of each other are arranged in the production well, an injection pipe column and a gas injection pipe column are arranged in the injection well, and the tail end of the production well is communicated with the bottom of the injection well, wherein the monitoring pipe column comprises a monitoring pipe and a guide cone which are connected in series in sequence; a plurality of temperature pressure monitoring devices are arranged in the monitoring pipe; the production pipe column comprises a sucker rod and an oil-gas separating device which are connected in series in sequence; the gas injection pipe column sleeves the upper part of the injection pipe column; the injection pipe column comprises a first oil pipe and a first sealing device which are connected in series in sequence, and a bell mouth is formed at the tail end of the injection pipe column; the gas injection pipe column comprises a second oil pipe and a second packer which are connected in series in sequence. Through the injection-production system and the injection-production method provided by the invention, the difficulty in lifting the pipe column in the production well can be lowered effectively.
Description
Technical field
The present invention relates to combustion in situ exploitation field, particularly relate to a kind of injection and extraction system and note mining method.
Background technology
Combustion in situ production technique is to utilize a part of heavy ingredient of crude oil in oil reservoir to make fuel, and heat of constantly burning, oil reservoir
In crude oil displace, there is the many advantages such as applied widely, oil displacement efficiency is high, low cost, Ke Yicheng compared with other oil production methods
Effective substituted technique for thickened oil recovery.Baked wheaten cake technology is applied to horizontal well, can reach the effect of fireflood assisted gravity drainage.
In fireflood assisted gravity drainage production process, typical feature is exactly high temperature (the highest more than 700 DEG C), high gas-oil ratio (HGOR), production fluid temperature
The stable propelling that degree excursion is big, tubing string operations number directly affects live wire leading edge in production process, for mid-deep strata viscous crude oil
Hiding, these features are the biggest for the normal Influence of production of horizontal production well.Lighter hydrocarbons, steam during wherein high gas-oil ratio (HGOR) refers to crude oil
Ratio regular meeting with fluid is substantially increased because of combustion in situ, after a large amount of gases enter pump, due to the compressibility of gas, makes pump
Effect reduce, when large-minded to a certain extent time, pump can be caused cannot to extract fluid out.
Conventional fireflood flow string structure is single, is mainly taken over control air pump by oil pipe string and concatenates gas anchor again and formed, wherein gas anchor
According to the difference of gas-liquid density, by helical structure, gas-liquid being separated, liquid enters oil well pump and is extracted into ground, and gas enters
Oil jacket annular space, is then discharged out outside well；And gas prevention pump is by opening by force the effect discharge opeing closed by force, even if containing a small amount of gas in liquid
The normal production of pump is not interfered with, the problem thus solving the pump efficiency reduction that high gas-oil ratio (HGOR) is brought yet.
But, above-mentioned fireflood produces the problem that single tubing string still cannot solve effectively to control production fluid temperature.In fireflood produces,
Down-hole fluid is the highest more than 700 DEG C, and minimum less than crude oil inflection temperature, (inflection temperature refers under certain temperature conditions, viscous crude
Viscosity substantially reduce, suitable with common thin oil viscosity), when downhole temperature is the highest, when exceeding the resistance to extreme temperature of tubing string, will
Make the tubing string life-span be greatly reduced, even occur that damage rupture causes pipe fitting to be scrapped；When temperature is the lowest, the viscous crude in pit shaft is difficult to
Flowing, brings sizable difficulty for lifting operation, all can affect being normally carried out of production so too high or too low for temperature.
For controlling downhole oil liquid temp, the situations such as too high and too low occur, under typically using in the producing well in injection and extraction system at present
Enter flow string, monitoring tubing string and injection string three casing string, by the independently working of three casing strings, to realize for downhole oil
The monitoring in real time of liquid temp and control.A kind of the most conventional injection and extraction system is described below.
Fig. 1 is the overview of the most conventional a kind of injection and extraction system.As it is shown in figure 1, described injection and extraction system is in producing well 400
It is provided with injection string 100, monitoring tubing string 200 and flow string 300 3 and overlaps tubing string independent of each other, be provided with in injecting well 900
Gas injection tube column.Described injection and extraction system has downwards straight well section a and net horizontal section b along producing well 400 well head, and described net horizontal section b adopts
With screen casing, fluid is arrived in producing well 400 by the hole of screen casing.Wherein, described injection string 100 and monitoring tubing string 200 times
Enter to net horizontal section b, and described flow string 300 is only lowered into straight well section a.Wherein: injection string 100 includes sequential concatenation
Instlated tubular 1, screen casing 12 and starting taper 13, monitoring tubing string 200 includes the monitoring pipe 2 of sequential concatenation, screen casing 10 and starting taper 13.Described
Monitoring pipe 2 uses integral joint tubing, and, monitoring pipe 2 is additionally provided with multiple temperature/pressure sensor；At straight well in integral joint tubing
Section a is provided with at least one temperature and pressure monitoring device 3, is provided with at least one temperature and pressure monitoring device at net horizontal section b.Described temperature and pressure are monitored
Device includes the thermocouple 11 for thermometric and the capillary tube 9 for pressure measurement, and the thermocouple of the temperature and pressure monitoring device of net horizontal section
11 and capillary tube 9 be uniformly distributed in the monitoring tubing string 200 of net horizontal section b.Thermocouple and capillary tube in temperature and pressure monitoring device 3 set
At same position and be under gas prevention pump 5.Flow string 300 includes the hollow stem 4 of sequential concatenation, gas prevention pump 5, gas anchor
6, screen casing 7 and starting taper 8.Described gas injection tube column includes oil pipe 21 and the packer 14 of sequential concatenation, and gas injection tube column end is provided with loudspeaker
Mouth 15, and, described injection well 900 borehole wall is provided with perforated interval, and described perforated interval is positioned under horn mouth 15 for being arranged by air
Enter in oil reservoir.The vertical dimension of producing well 400 horizontal segment b end described in the bottom hole spacing of described injection well 900 and horizontal range
All between 5-10m.
In the above prior art, described injection and extraction system is provided with monitoring tubing string 200 and injection string in producing well net horizontal section
100, the most conventional a diameter of 73 millimeters of injection string 100, monitoring tubing string are 53 millimeters.Under fashionable, enter down thicker note
Enter tubing string 100, then under enter thinner monitoring tubing string 200.But, the producing well degree of depth typically above 1000 meters, under this length,
Thinner monitoring tubing string 200 under its front end fashionable be susceptible to bending, especially when net horizontal section, due under the power that enters be all
Power the most down, and monitor tubing string 200 and be in level at net horizontal section, for monitoring tubing string 200 at net horizontal section
The state of stretching into is not easy to hold, and after monitoring the bending of tubing string 200 front end, along with under enter length more and more monitoring tubing string 200 and bend
Degree is the biggest, is finally easy to be wrapped on injection string 100.In workover treatment, need sequentially to trip out monitoring tubing string 200 He
Injection string 100, as there is above-mentioned net horizontal section wrapping phenomena, can cause described tubing string normally to trip out.
Summary of the invention
The present invention provides a kind of injection and extraction system and note mining method, so that the internal tubing string of injection and extraction system producing well in later stage workover treatment
Easily trip out.
In view of above-mentioned purpose, the present invention provides a kind of injection and extraction system, and described injection and extraction system includes producing well, monitoring tubing string, production
Tubing string, injection well, injection string, gas injection tube column；It is internal and independent of one another that described monitoring tubing string and flow string are located at producing well,
Described injection string and gas injection tube column are located at and inject into well；Described producing well end communicates with injecting well shaft bottom；
Wherein, described monitoring tubing string includes the monitoring pipe of sequential concatenation, starting taper, is provided with multiple temperature and pressure monitoring dress in described monitoring pipe
Put；Described flow string includes the sucker rod of sequential concatenation, gas and oil separating plant；
Described gas injection tube column is set in injection string top, injection string include the first oil pipe of sequential concatenation and the first packer and
Injection string end is provided with horn mouth；Described gas injection tube column includes the second oil pipe and second packer of sequential concatenation.
The present invention also provides for a kind of note mining method, applies above-mentioned injection and extraction system, and it includes
Warm-up phase: injection string and gas injection tube column are injected simultaneously into steam, meanwhile, the production fluid of pre-hot formation is discharged by flow string；
Fireflood initial stage: continue steam injection along described injection string, gas injection tube column stops steam injection, changes injection air, until
Production fluid gives rise to ground；
Fireflood takes effect the stage: gas injection tube column continues to inject air, and injection string stops injecting steam, changes injection water.
By above technical scheme, in it is an advantage of the current invention that described producing well, tubing string quantity is become from three sets of the prior art
Two sets enter under being easier to, and, monitoring tubing string and injection string lay respectively in different well, during entering under monitoring tubing string by
Also it is less likely to occur to be wound around in lacking injection string, and then in later stage workover treatment, existing owing to lacking winding of the prior art
As, the tubing string in the producing well of the present invention is easier to trip out.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or prior art
In description, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only the one of the present invention
A little embodiments, for those skilled in the art, on the premise of not paying creative work, it is also possible to attached according to these
Figure obtains other accompanying drawing.
Fig. 1 is the overview of the most conventional a kind of injection and extraction system；
Fig. 2 is the overview of a kind of injection and extraction system of the present invention.
Detailed description of the invention
For the technical scheme making those skilled in the art be more fully understood that in the application, below in conjunction with in the embodiment of the present application
Accompanying drawing, the technical scheme in the embodiment of the present application is clearly and completely described, it is clear that described embodiment is only
It is some embodiments of the present application rather than whole embodiments.Based on the embodiment in the application, ordinary skill people
The every other embodiment that member is obtained on the premise of not making creative work, all should belong to the model of present invention protection
Enclose.
Describe technical scheme below in conjunction with the accompanying drawings in detail.
Fig. 2 shows the overview of a kind of injection and extraction system of the present invention.Described injection and extraction system includes producing well 400, monitoring tubing string
200, flow string 300, injection well 900, injection string 100, gas injection tube column 101；Described monitoring tubing string 200 and production
It is internal and independent of one another that tubing string 300 is located at producing well 400, and described injection string 100 and gas injection tube column 101 are located at injection well 900
In；Described producing well 400 end communicates with injecting well shaft bottom 900；
Wherein, described monitoring tubing string 200 includes the monitoring pipe 1 of sequential concatenation, starting taper 7, is provided with multiple in described monitoring pipe 1
Temperature and pressure monitoring device；Described flow string 300 includes the sucker rod 3 of sequential concatenation, gas and oil separating plant；
Described gas injection tube column 101 is set in injection string 100 top, and injection string 100 includes the first oil pipe 10 of sequential concatenation
It is provided with horn mouth 8 with the first packer 9 and injection string 100 end；Described gas injection tube column 101 includes the second of sequential concatenation
Oil pipe 12 and the second packer 11.
Further, described injection and extraction system has downwards straight well section a and net horizontal section b, wherein, described water along producing well well head
Horizontal well section b end communicates with injecting well 900 shaft bottom.Described monitoring tubing string 200 is lowered into net horizontal section b, described flow string
300 are lowered into straight well section a.
In a specific embodiment, what described monitoring tubing string 200 also included being serially connected between monitoring pipe 1 and starting taper 7 is a length of
The screen casing 13 of 2 meters.Described monitoring pipe 1 can be integral joint tubing, and monitoring pipe 1 place straight well section a part is at least provided with one
Temperature and pressure monitoring device 2.Temperature and pressure monitoring device 2 includes device for detecting temperature and pressure monitoring device, and, device for detecting temperature is adopted
With thermocouple, pressure monitoring device uses capillary tube.In net horizontal section b part at least provided with a device for detecting temperature 6.Temperature
Degree monitoring device 6 uses thermocouple, and, thermocouple is uniformly distributed in the monitoring pipe 1 of net horizontal section b.
Further, described monitoring pipe 1 net horizontal section b part also at least provided with a pressure monitoring device, described horizontal well
The pressure monitoring device of section uses capillary tube.Described capillary tube is uniformly distributed in the monitoring pipe 1 of net horizontal section b.But the present invention
Be not limited thereto, the position of thermocouple also can uneven distribution, wherein 1 thermocouple and wherein 1 capillary tube
Can be located at same position.
In another specific embodiment, the gas and oil separating plant of described flow string includes gas anchor 5 and is located at the anti-of gas anchor top
Air pump 4.
Below in conjunction with a specific embodiment, a kind of injection and extraction system provided by the present invention is described.
Fig. 2 shows the overview of a kind of injection and extraction system of the present invention.As in figure 2 it is shown, in the present embodiment, producing well 400
Inside it is provided with monitoring tubing string 200 independent of each other and flow string 300, and the injection and extraction system that the present embodiment is provided is along producing well well
Mouth has downwards straight well section a and net horizontal section b, and wherein, described monitoring tubing string 200 is lowered into net horizontal section b, described production
Tubing string 300 is lowered into straight well section a.Described monitoring tubing string 200 includes the monitoring pipe 1 of sequential concatenation, screen casing 13, starting taper 7.
A length of 2 meters of described screen casing 13.Described monitoring pipe 1 uses integral joint tubing, monitoring pipe 1 place straight well section a part to be provided with 1
Individual temperature and pressure monitoring device 2, is provided with multiple temperature and pressure monitoring device 6 in net horizontal section b part.Described temperature and pressure monitoring device includes using
In the thermocouple of thermometric with for the capillary tube of pressure measurement, and, the temperature and pressure monitoring device 6 of net horizontal section b include 3 capillary tubies and
4 thermocouples, the thermocouple of the temperature and pressure monitoring device 6 of net horizontal section b and capillary tube are uniformly distributed in the monitoring pipe of net horizontal section
In 1；Described temperature and pressure monitoring device 2 includes 1 capillary tube and 1 thermocouple, and capillary tube is in same position with thermocouple.
Described flow string 300 includes the sucker rod 3 of sequential concatenation, gas and oil separating plant；Described gas and oil separating plant includes gas anchor 5
And it is located at the gas prevention pump 4 on gas anchor top.Described producing well 400 net horizontal section b uses screen casing, and oil heat can be from the Kong Zhongliu of screen casing
Entering in net horizontal section b, described net horizontal section b end communicates with injecting well 900 shaft bottom.
It is provided with injection string 100 and gas injection tube column 101 in injecting well 900；Wherein, described gas injection tube column 101 is set in note
Enter tubing string 100 top and gas injection tube column 101 inwall is not in contact with each other with injection string 100 outer wall；Described injection string 100 includes
First oil pipe 10 of sequential concatenation and the first packer 9 and injection string 100 end are provided with horn mouth 8；Described gas injection tube column
100 the second oil pipe 12 and the second packers 11 including sequential concatenation.Inject in well 900 and be provided with perforated interval 14, perforated interval 14
It is positioned under gas injection tube column 101, forms the injection air in annular space by perforated interval 14 for the second oil pipe 12 and the first oil pipe 10
Enter in oil reservoir.
According to the embodiment of a kind of injection and extraction system of the invention described above, its operation principle is as follows:
Fireflood Preliminary division is three phases.First stage is the fireflood preproduction phase, and this stage is mainly by injection string 100
Injecting steam with gas injection tube column 101, preheating oil reservoir also sets up note, the thermal communication adopting between well, does for after-ignition and production
Prepare；Second stage is fireflood initial stage, and this stage live wire leading edge does not also arrive producing well tiptoe, and (described producing well tiptoe refers to
Producing well 400 net horizontal section b with inject junction, well 900 shaft bottom), dredge oil amount is less, and production fluid temperature is relatively low (minimum can be low
In crude oil inflection temperature, inflection temperature i.e. instigates thick oil viscosity substantially to reduce and the temperature conditions suitable with common thin oil viscosity)；
Three phases is that fireflood takes effect the phase, and this stage live wire leading edge has arrived at producing well tiptoe, and dredge oil amount is greatly increased, production fluid temperature
Spend higher (highest possible more than 700 DEG C).
Hereinafter the operational approach of the present embodiment is introduced stage by stage:
First stage: warm-up phase；Injection string 100 and gas injection tube column 101 inject steam, while injecting steam,
Flow string 300 is discharged the production fluid of pre-hot formation in time, thus improves stratum pre-heat effect, and monitoring tubing string 200 is monitored in real time
The temperature, pressure in shaft bottom, for judging whether that reaching pre-heat effect provides foundation.
Second stage is fireflood initial stage；First with combustion adjuvant aid lighting oil reservoir, combustion adjuvant injection phase is the second packing
The perforated interval 14 of device 11 bottom；After lighting oil reservoir, the annular space of the second oil pipe 12 and the first oil pipe 10 injects air, by
Also not arriving producing well tiptoe in this stage live wire leading edge, meanwhile, dredge oil amount is less, and production fluid temperature is relatively low (minimum less than former
Oil inflection temperature), this stage first oil pipe 10 needs to inject a certain amount of steam auxiliary heat tracing, and monitoring tubing string 200 is monitored in real time
Production fluid temperature, it is ensured that the injection rate of steam enough makes production fluid efficiently give rise to ground, and 300 production fluids of flow string are discharged in time,
Do not affect the effect of fireflood displacement.
Three phases is that fireflood takes effect the phase；This stage live wire leading edge has arrived at producing well tiptoe, and dredge oil amount substantially increases, and produces
Liquid temp higher (highest possible more than 700 DEG C), this stage first oil pipe 10 needs to inject the lifting of a certain amount of water auxiliary temperature-reducing,
Due to production fluid temperature higher (highest possible more than 700 DEG C), the resistance to extreme temperature of tubing string, now, injection string 100 can be can exceed that
Inject water, to reduce the temperature of production fluid, i.e. water mixing cooling；Monitoring tubing string 200 monitors production fluid temperature in real time, it is ensured that the injection of water
Amount enough makes production fluid temperature drop in safety range.
By above description, in the described producing well of the present embodiment, tubing string quantity is become two sets from three sets of the prior art, and,
Monitoring tubing string 200 and injection string 100 lay respectively in different well, owing to lacking ascending pipe during monitoring tubing string enters for 200 times
Post 100 enters under being also less likely to occur to be wound around and be easy, and, in later stage workover treatment, owing to lacking above-mentioned wrapping phenomena originally
Tubing string in the producing well of invention is easier to trip out.
, being located at by flow in pipes 100 in injection well 900, when warm-up phase, steam is entered into by injection string 100 meanwhile
The direction of producing well 400 is towards producing well 400 direction, such steam in producing well 400 with regard to the pre-thermal efficiency faster.And it is existing
Injection string 100 in technology towards being towards injecting well direction, such steam by injection string 100 out time the direction just back of the body
From producing well, preheat inefficient.
Same, to take effect the stage in fireflood, the direction that water is entered into producing well 400 by injection string 100 is towards producing well 400
Direction, the most more preferably, the cooling-down effect played also becomes apparent from effectively injected water release efficiency in producing well 400.
Present invention also offers a kind of note mining method, apply injection and extraction system as above, the method includes:
Warm-up phase: injection string 100 and gas injection tube column 101 are injected simultaneously into steam, meanwhile, flow string 300 will the most thermally
The production fluid of layer is discharged；
In the fireflood stage: continue steam injection along described injection string 100, gas injection tube column 101 stops steam injection, changes injection air,
Production fluid is given rise to ground by flow string 300.
Note mining method described above, after industry is given rise to ground by flow string 300, also include that fireflood takes effect the stage, in fireflood
Take effect the stage:
When producing well shaft bottom production fluid temperature is more than 300 degrees Celsius, gas injection tube column 101 continues to inject air, injection string 100
Stop injecting steam, change injection water；
When producing well shaft bottom production fluid temperature is less than 300 degrees Celsius, and when producing well well head production fluid temperature is less than crude oil inflection temperature,
Heat up to down-hole steam injection along injection string 100, and set steam injection speed according to Liquid output, improve gas injection tube column 101 simultaneously
Gas injection rate.
The ultimate principle of the present invention, principal character and advantages of the present invention have more than been shown and described.The technical staff of the industry should
This understanding, the present invention is not restricted to the described embodiments, and the simply explanation present invention's described in above-described embodiment and description is former
Reason, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, these changes and improvements
Both fall within the scope of protection of present invention.Claimed scope is by appending claims and equivalent circle thereof
Fixed.
Claims (9)
1. an injection and extraction system, it is characterised in that including: producing well, monitoring tubing string, flow string, injection well, injection
Tubing string, gas injection tube column；It is internal and independent of one another that described monitoring tubing string and flow string are located at producing well, described injection string and note
Trachea post is located at and injects into well；Described producing well end communicates with injecting well shaft bottom；
Wherein, described monitoring tubing string includes the monitoring pipe of sequential concatenation, starting taper, is provided with at least one temperature and pressure prison in described monitoring pipe
Survey device；Described flow string includes the sucker rod of sequential concatenation, gas and oil separating plant；
Described gas injection tube column is set in injection string top, and injection string includes the first oil pipe and first packer of sequential concatenation,
And injection string end is provided with horn mouth；Described gas injection tube column includes the second oil pipe and second packer of sequential concatenation.
2. a kind of injection and extraction system as claimed in claim 1, it is characterised in that described injection and extraction system is downward along producing well well head
Having straight well section and net horizontal section, wherein, described net horizontal section end communicates with injecting well shaft bottom；Described monitoring tubing string is lowered into
Net horizontal section, described flow string is lowered into straight well section.
3. a kind of injection and extraction system as claimed in claim 2, it is characterised in that described monitoring tubing string also includes being serially connected in monitoring
Screen casing between pipe and starting taper.
4. a kind of injection and extraction system as claimed in claim 2, it is characterised in that described monitoring pipe is integral joint tubing, described
Temperature and pressure monitoring device is located at monitoring pipe straight well section part, in net horizontal section part also at least provided with a device for detecting temperature.
5. a kind of injection and extraction system as claimed in claim 4, it is characterised in that described device for detecting temperature is uniformly distributed in water
In the monitoring pipe of horizontal well section.
6. a kind of injection and extraction system as described in any one of Claims 1 to 5, it is characterised in that the oil gas of described flow string divides
Include gas anchor from device and be located at the gas prevention pump on gas anchor top.
7. a kind of injection and extraction system as claimed in claim 4, it is characterised in that described monitoring pipe is additionally provided with pressure at net horizontal section
Power monitoring device.
8. a note mining method, application a kind of injection and extraction system as claimed in claim 1, it is characterised in that including:
Warm-up phase: injection string and gas injection tube column are injected simultaneously into steam, meanwhile, the production fluid of pre-hot formation is discharged by flow string；
In the fireflood stage: continue steam injection along described injection string, gas injection tube column stops steam injection, changes injection air, flow string
Production fluid is given rise to ground.
9. a kind of note mining method as claimed in claim 8, it is characterised in that also include after the fireflood stage that fireflood takes effect the stage,
Take effect the stage in fireflood:
When producing well shaft bottom production fluid temperature is more than 300 degrees Celsius, gas injection tube column continues to inject air, and injection string stops injecting
Steam, changes injection water；
When producing well shaft bottom production fluid temperature is less than 300 degrees Celsius, and when producing well well head production fluid temperature is less than crude oil inflection temperature,
Heat up to down-hole steam injection along injection string, and set steam injection speed according to Liquid output, improve gas injection tube column gas injection rate simultaneously.
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| CN201410052124.4A CN103867172B (en) | 2014-02-14 | 2014-02-14 | Injection-production system and injection-production method |
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| CN201410052124.4A CN103867172B (en) | 2014-02-14 | 2014-02-14 | Injection-production system and injection-production method |
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| CN103867172B true CN103867172B (en) | 2017-01-11 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104453818B (en) * | 2014-11-06 | 2018-01-02 | 中国石油天然气股份有限公司 | A kind of combustion soaking well note adopts integrated pipe column and its ignition method |
| CN107514250B (en) * | 2016-06-15 | 2019-07-30 | 中国石油化工股份有限公司 | A method of for steam assisted gravity drainage |
| CN108079347B (en) * | 2018-02-16 | 2020-07-17 | 湖南九弘医疗科技有限公司 | Medical instrument degassing unit |
| CN112240193B (en) * | 2020-11-17 | 2022-05-31 | 东北石油大学 | Multistage oil-water separation and same-well injection-production device in horizontal shaft |
| CN112302533A (en) * | 2020-11-18 | 2021-02-02 | 青海凹口凸钾镁盐技术有限公司 | Construction method of gas injection hole |
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| CN1837575A (en) * | 2006-02-24 | 2006-09-27 | 尤尼斯油气技术（中国）有限公司 | Processing technology for extracting oil from metamorphic rock high pour point oil of burial hill by using combustion drive in horizontal well |
| CN203394444U (en) * | 2013-05-29 | 2014-01-15 | 中国石油天然气股份有限公司 | Fireflood-assisted gravity drainage injection and production technology system |
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