CN106593377A - Steam flooding starting method for super-heavy oil horizontal wells - Google Patents
Steam flooding starting method for super-heavy oil horizontal wells Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 50
- 239000000295 fuel oil Substances 0.000 title claims abstract description 17
- 238000010795 Steam Flooding Methods 0.000 title abstract description 13
- 238000010793 Steam injection (oil industry) Methods 0.000 claims abstract description 88
- 238000012216 screening Methods 0.000 claims abstract description 3
- 239000003921 oil Substances 0.000 claims description 51
- 230000015572 biosynthetic process Effects 0.000 claims description 16
- 238000011084 recovery Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 4
- 230000035699 permeability Effects 0.000 claims description 4
- 230000005855 radiation Effects 0.000 claims description 3
- 238000009835 boiling Methods 0.000 claims description 2
- 238000010025 steaming Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 17
- 230000008901 benefit Effects 0.000 abstract description 5
- 239000010779 crude oil Substances 0.000 abstract description 5
- 125000004122 cyclic group Chemical group 0.000 abstract 2
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 238000007796 conventional method Methods 0.000 description 12
- 238000004891 communication Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B43/30—Specific pattern of wells, e.g. optimising the spacing of wells
- E21B43/305—Specific pattern of wells, e.g. optimising the spacing of wells comprising at least one inclined or horizontal well
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- Geochemistry & Mineralogy (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention provides a steam flooding starting method for super-heavy oil horizontal wells. The method comprises the steps of screening out a super-heavy oil reservoir, and deploying production wells at the bottom of the super-heavy oil reservoir; deploying a steam injection well above a position between the adjacent production wells, wherein both the production wells and the steam injection well are horizontal wells; injecting steam into the horizontal wells to carry out single-well cyclic preheating until a stable heat field is formed at a horizontal near-wellbore zone; preheating the horizontal wells in steam huff-puff manner until a stable heat field is formed between the steam injection wells and the production wells; continuously injecting steam to the steam injection wells, and carrying out single-well cyclic preheating on the production wells to finish steam flooding starting for super-heavy oil horizontal wells. Compared with conventional single huff-puff preheating mode, the method according to the technical scheme provided herein provides greatly shortened preheating time, reduced operation cost of preheating and increased post-conversion yield of crude oil, and has very high economic benefit.
Description
Technical field
The present invention relates to a kind of steam of super-viscous oil horizontal well drives startup method, belong to viscous crude field oil recovery technique field.
Background technology
Super-viscous oil viscosity of crude is high, and under reservoir temperature, degassed crude viscosity is more than 50000mPas, and such oil reservoir is generally adopted
Produced with steam soak mode, horizontal well turns horizontal well vapour and drives the recovery ratio for continuing to improve oil reservoir after handling up.Handle up preheating conduct
Steam drives the main method for promoting to connect between front well, using steam as thermal source during handling up, using heat transfer and thermal convection current machine
Reason, injects steam and carries the heated perimeter that heat progressively expands oil reservoir, until (well spacing between injection-production well during multi-cycle stimulation
30m) temperature field rises to 75-80 DEG C, and viscosity of crude is down to below 20000mPas, and flow resistance reduces, and has possessed certain
Fluid ability, tentatively judge that inter well connectivity can preferably be implemented to turn a drive.
But adopt in this way, easily the well bore and oil reservoir of completion caused damage, and for shallow super heavy oil (<
200m) reservoir, is easily caused nearly well area and defines microcrack laterally or longitudinally, be unfavorable for the super-heavy oil deposit later stage during steam injection
Effectively exploit.
Therefore it provides a kind of steam drive startup method of super-viscous oil horizontal well becomes this area technology urgently to be resolved hurrily and asks
Topic.
The content of the invention
To solve above-mentioned technical problem, it is an object of the invention to provide a kind of steam of super-viscous oil horizontal well drives startup side
Method, the method highly shortened preheating time compared with conventional single preheating method of handling up, reduce operation during preheating into
This, has also heightened crude output after turn drive, with high economic benefit.
To reach above-mentioned purpose, the invention provides a kind of super-viscous oil horizontal well steam drive startup method, it include with
Lower step：
Screening super-heavy oil deposit, in the bottom deployment producing well of the super-heavy oil deposit, in the middle of adjacent two mouthfuls of producing wells
Top deployment steam injection well, the producing well and the steam injection well are horizontal well；
Steam being injected in horizontal well, carrying out standing column well preheating, control steam injection pressure is less than formation fracture pressure, until
Horizontal direction near wellbore zone forms stable thermal field；
Horizontal well is preheated using the mode of steam soak, control steam injection pressure is less than formation fracture pressure, until
Stable thermal field is formed between steam injection well and producing well；
To steam injection well continuous steam injection, steam injection rate is stepped up to end value by initial value during continuous steam injection, and
Control steam injection pressure is less than formation fracture pressure, while injecting steam to producing well, carries out standing column well preheating to producing well, directly
50-80 DEG C is reached to the temperature between steam injection well and producing well, and the connecting degree between steam injection well and producing well is more than 50%,
The steam for completing super-viscous oil horizontal well drives startup.
In the technical scheme that the present invention is provided, horizontal well steam drives start-up technique and refers to by rational preheating method,
The effective thermal communication set up between horizontal well injection-production well group and hydraulic communication, reach a kind of technology for turning that steam drives requirement, and vapour drives
Startup can be such that steam injection well and producing well realizes from warm-up phase to displacement step transition；It is first to inject one to well that steam soak refers to
Quantitative steam, closing well for a period of time, after steam heat energy to after oil reservoir diffusion, a kind of then increasing of exploitation heavy oil of opening well and making production
Product method.
The present invention is starting having made intensive studies for steam drive to the conventional preheating method using steam soak, studies
Following problem is found in journey：
1. conventional method is to realize efficient heat transfer, it is necessary to assure single-wheel steam injection amount is big, is also had necessarily to injecting pressure
(injection pressure ＞ 5mpa) is required, pressure is usually injected into and is higher than formation fracture pressure, easily the well bore and oil reservoir of completion are made
Into infringement；
2. conventional method can only adapt to the heavy crude reservoir of buried depth ＞ 200m, for shallow super heavy oil (<200m) reservoir, it is original
Formation temperature is relatively low, and viscosity of crude is higher not to have fluid ability substantially, and conventional method to be realized the injection of steam, initial stage steam injection
Pressure is generally more than formation fracture pressure, causes nearly well area to define microcrack laterally or longitudinally, permeability extreme difference plus
The anisotropism of oil reservoir is increased greatly, is unfavorable for that the super-heavy oil deposit later stage effectively exploits, these cracks are being gulped down as hypertonic passage
The stage of telling causes horizontal segment, and locally suction vapour is too fast, and horizontal segment difficult to realize is uniformly heated, it is also difficult to reach uniform startup and stable
The purpose that vapour drives, and after steam drive is turned, same easily to form channelling between well, steam is lost in form invalid note along high-speed channel
Vapour, while the region remaining oil that steam fails to involve is difficult to be employed again, directly affects vapour and drives efficiency, reduce well yield；
Further, since reservoir buried depth is shallow, viscosity of crude is big, if in order to avoid pressure break oil reservoir need to reduce the single-wheel handled up note
Tolerance, so injects the thermal Finite that steam can be transmitted, directly affects pre-heat effect；
3., often as the initial stage of handling up forms crack, along hypertonic passage channelling, heat loss is serious for injection steam for conventional method, day
Oil production is low and aqueous height, produces wayward；
4. field test has been carried out to conventional method, from terms of the result of field test, conventional method is realizing horizontal segment
Effectively employ process, single-wheel time throughput time is up to 60-120 days, usually more than 360 days preheating time, whole development efficiency compared with
It is low, and conventional method during the employing of horizontal segment is realized needs, by too high steam injection pressure, to be easily destroyed stratum, shadow
Ring and turn the effect after driving；
5. the oil reservoir scope relative narrower that conventional method is suitable for, and the time of circulation preheating is oversize, economic benefit is low.
The technical scheme that the present invention is provided, first using steam to horizontal well (horizontal well refers to steam injection well and producing well)
Preheating is circulated, the steam for keeping relatively low in warm injects pressure, makes horizontal well surrounding formation thermally equivalent, Ke Yichu
Step realizes that full well section uniformly starts；Horizontal well is preheated by the way of steam soak afterwards, can further expand water
The heated perimeter of horizontal well, heating deep oil reservoir, simultaneously because the pre- heat effect of the circulation of early stage, can show when steam soak is preheated
Write the steam injection pressure during reducing handling up, it is to avoid infringement to pit shaft and oil reservoir；Vapour drive startup stage is proceeded to finally (i.e. right
Steam injection well continuous steam injection, while implementing standing column well preheating to producing well), the stage is under relatively low steam injection pressure (less than ground
Layer fracture pressure) thermal communication and hydraulic communication relation between well not only can be fast and effeciently set up, and avoid due to note
A series of problems, such as crack, warm-up phase horizontal segment employ not uniform vapour drive stage steam channelling between the steam pressure too high well for causing
Generation, be horizontal well vapour drive the stage efficient gas drive lay a good foundation, additionally, proceed to vapour drive startup stage when, producing well reality
Applying can reduce the pressure that vapour drives startup using standing column well preheating, realize full well section low pressure, stablize, uniformly start.
In the above-mentioned methods, when being preheated to horizontal well using the mode of steam soak, the quantity of steam of injection can be with root
It is configured according to factors such as reservoir condition, oil property, horizontal well lengths, it is preferable that the controlling of injecting quantity of steam is in 1500-
2500m3/ wheel.
In the above-mentioned methods, it is preferable that the super-heavy oil deposit meets following condition：Core intersection>8m；Reservoir permeability
>600×10-3μm2；Viscosity of crude<40000mPa·s；Oil saturation>65%.
In the above-mentioned methods, it is preferable that be parallel to each other between the horizontal segment of each horizontal well.
In the above-mentioned methods, it is preferable that during top deployment steam injection well in the middle of adjacent two mouthfuls of producing wells, the steam injection well
5m is at least with the vertical distance between adjacent two mouthfuls of producing wells, the extension of vapor chamber is so can ensure that, as far as possible in fact
Show employing for oil reservoir；It is highly preferred that the distance between the steam injection well and every mouth producing well in adjacent two mouthfuls of producing wells
For 30-40m.
The Horizontal Well web frame provided using the present invention, can make full use of the assosting effect of gravity, effectively increase
The spreading range and oil reservoir of vapor chamber employ scope, it is possible to obtain higher recovery ratio and gas oil ratio.
In the above-mentioned methods, it is preferable that steam is injected in horizontal well, carry out standing column well preheating, until level side
When forming stable thermal field near wellbore zone, the horizontal direction near wellbore zone includes outside in the horizontal direction centered on well bore
The region formed by radiation 4-6m, the region for more preferably being formed to external radiation 5m；It is further preferred that the horizontal direction
The temperature of the stable thermal field that near wellbore zone is formed is 50-80 DEG C.
In the above-mentioned methods, it is preferable that inject steam to horizontal well, when carrying out standing column well preheating, using long tube steam injection,
Short tube is adopted the mode of liquid and is preheated；It is highly preferred that steam is injected to horizontal well, when carrying out standing column well preheating, control individual well
Steam injection amount is 40-60m3/ d, controls steam injection pressure and is slightly below formation fracture pressure during steam injection, general formation fracture pressure is higher than
Steam injection pressure can be controlled to 4-4.5MPa during steam injection by 4.5MPa, cause stratum to break in this makes it possible to avoid steam injection process
Split, in practical operation, this can be adjusted correspondingly according to the concrete condition of oil reservoir.
In the above-mentioned methods, it is preferable that steam is injected in horizontal well, carry out standing column well preheating, preheating time is 60-
90 days.Carry out standing column well preheating to heat the neighbouring stratum of injection-production well and promote thermal communication between well.
In the above-mentioned methods, it is preferable that the steam soak includes three phases, it is steam injection stage, stewing well stage respectively
And recovery phase；It is highly preferred that the time in the steam injection stage is 10-15 days, the time for boiling in a covered pot over a slow fire the well stage is 1-5 days, back production rank
The time of section is 45-120 days.Horizontal well is carried out preheating the office that can break through standing column well preheating using the mode of steam soak
Limit, quickly sets up between well and effectively connects.
In the above-mentioned methods, it is preferable that horizontal well is preheated using the mode of steam soak, control the steam injection of individual well
Pressure is 4-4.5MPa, and steam injection rate is 150-180m3/d。
In the above-mentioned methods, it is preferable that the temperature of the stable thermal field formed between the steam injection well and producing well is 50-
80℃。
In the above-mentioned methods, to steam injection well continuous steam injection, steam injection rate is progressively carried by initial value during continuous steam injection
Up to end value, and steam injection pressure is controlled less than formation fracture pressure, while steam is injected to producing well, list is carried out to producing well
During well circulation preheating, can be adopted using long tube note short tube or short tube is noted by the way of long tube adopts according to the connection situation of horizontal segment.
In the above-mentioned methods, it is preferable that the initial value is 50m3/ d, the end value are 80-120m3/d。
In the above-mentioned methods, it is preferable that the horizontal section length of the horizontal well is 250-400m.
Beneficial effects of the present invention：
(1) the technical scheme scope of application that the present invention is provided is big, for viscous crude of the reservoir buried depth less than 200m is similarly fitted
With especially for some super-viscous oil oil fields in economic limit edge, the income that can more obtain；
(2) in the technical scheme that the present invention is provided, steam is injected in horizontal well, carrying out standing column well preheating can be real
Show effectively employing for horizontal segment, use rate is increased along horizontal segment oil reservoir heated perimeter up to more than 85%, and conventional method
Use rate is 50% or so；
(3) compared with single preheating technology of handling up, the technical scheme that the present invention is provided carries out standing column well preheating in early stage
Stable thermal field can be formed, the steam thermal efficiency in the stage of handling up is improve, while avoiding the formation of hypertonic passage, vapour is reduced
The risk altered；
(4) compared with simple subprogram preheating technology, the later stage handles up Preheated steam injection intensity greatly, accelerates steam and stratum
Crude oil conduction of heat, heightens pipeline start up by preheating speed；
(5) driven using the vapour of producing well cycle preheating type and start the initial pressure for reducing startup, be more beneficial for horizontal segment
Overall uniform startup.
Description of the drawings
Fig. 1 is the well pattern structure schematic diagram that super-heavy oil deposit dual horizontal well steam drives；
Fig. 2 carries out the schematic diagram of steam standing column well preheating for horizontal well；
Fig. 3 drives for the steam of super-viscous oil horizontal well and starts method flow schematic diagram；
Main Reference label declaration：
1：Horizontal well；2：Long tube；3：Short tube；4：Thermal field；11：Steam injection well；12：Producing well.
Specific embodiment
In order to be more clearly understood to the technical characteristic of the present invention, purpose and beneficial effect, now to skill of the invention
Art scheme carry out it is described further below, but it is not intended that to the present invention can practical range restriction.
Embodiment
The steam for present embodiments providing a kind of super-viscous oil horizontal well drives startup method.
The present embodiment with Xinjiang Oilfield oil reservoir block as object of study, the oil reservoir be an oil deposit of shallow-layer super heavy, the oil
Hide buried depth 160m, mean reservoir pressure 1.5MPa, 18.0 DEG C of formation temperature；Effective pay thickiness 24.5m；Porosity
32.2%, reservoir permeability 3097mD；Average viscosity of crude 22000mPas at a temperature of 50 DEG C；Oil saturation 77.0%.
Steam expelling water horizontal well well group is disposed in oil reservoir bottom, can be disposed according to the well pattern structure described in Fig. 1, super
The bottom deployment producing well 12 of heavy crude reservoir, steam injection well 11 is disposed in the top in the middle of adjacent two mouthfuls of producing wells, in deployment well pattern
When, depending on the number of horizontal well can be according to the practical situation of oil reservoir：Relatively simple one note two of only deployment of oil reservoir adopts three water
Horizontal well, i.e., dispose two mouthfuls of producing wells in oil reservoir bottom, the top deployment steam injection well in the middle of the two producing wells, steam injection well
Vertical distance with the two producing wells is that the distance between 5m, steam injection well and the two producing wells are respectively 30m；Oil reservoir is more
When complicated, steam injection well and producing well can be further added by the basis of a note two is adopted, the deployment way adopted according to a note two is along water
Square to disposing successively.In horizontal well well group, the horizontal section length of horizontal well is 240m.
Steam is proceeded by after the good horizontal well group of deployment and drives start-up technique test, experiment process is as shown in Figure 3：
(1) cleaning works is implemented to horizontal well pipeline first, persistently injects steam to horizontal well using long tube, using short tube
Drain, to clean pit shaft borehole wall dirt and residual oil, it is ensured that long tube (supervisor), short tube (looped pipeline) are in connected state.
(2) cleaning reduces steam injection amount after finishing, holding gas injection rate is 50m3/ day, steam injection pressure are 2.5mpa, produce shape
State is implemented standing column well and is preheated 90 days as shown in Fig. 2 using long tube 2 to steam injection in horizontal well 1, carry out adopting liquid by short tube 3,
When horizontal segment near wellbore zone heating radius are 4.53m, form 75-80 DEG C of stable thermal field 4, now near wellbore zone crude oil due to
There is a certain degree of decline in heat effect, viscosity；Carry out standing column well and preheat the stratum that can be added near injection-production well, promote well
Between thermal communication, realize horizontal segment it is uniform, it is stable start, implement to provide advantage for preheating of handling up.
(3) oil viscosity declines, and now, changes preheating method, horizontal well is carried out using the mode of steam soak
Individual well steam injection amount is risen to 150m by preheating (preheating of also referred to as handling up)3/ day, the more conventional preheating of handling up of steam injection pressure are low, control
System is consistently less than formation fracture pressure in 3.5MPa, and steam injection 10 days boils in a covered pot over a slow fire well 3 days, horizontal well opening well and making production 45 days；
Steam soak preheating is carried out on the basis of circulation preheating, the limitation of the nearly well preheating of individual well can be broken through, it is quick to set up
Effective connection between well；After steam soak preheating 3-4 wheels, between injection-production well, the distribution in 30m temperature fields is more uniform, and temperature can be tieed up
Hold at 80 DEG C, now, viscosity of crude is down to below 2000mPas, flow resistance reduces, and has possessed certain fluid ability.
(4) vapour drives startup stage, by the steam injection rate of steam injection horizontal well from 50m3/ d is improved step by step to 100m3/ d, using length
Pipe steam injection short tube is adopted the mode of liquid and implements circulation preheating to producing horizontal well；Because producing well is using circulation preheating, note during being somebody's turn to do
The steam injection pressure control of vapour well just realizes full well section low pressure, stable, uniform startup under the conditions of 3.5MPa；Can subsequently proceed to
Steam drives the production phase.
Using method provided in an embodiment of the present invention, dual horizontal well steam drives and steam is continuously injected from steam injection well
To in oil reservoir, vapor chamber transversely extends, and is heated viscous crude, viscosity reduction, and is driven to horizontal production well.Producing well is located at oil
The bottom of layer, drives the crude oil on oil reservoir top to move to producing well, and into after producing well vapour chamber, crude oil is common in driving force and gravity
Produce from horizontal production well under same-action.
Economic and Efficiency Analysis：
Conventional method starts steam using the preheating method of single steam soak and drives, from terms of the result of field test, conventional
Method cannot realize effectively employing for horizontal segment, and single-wheel time throughput time is up to 60-120 days, and preheating time is usually more than 360
My god, whole development is less efficient；
The accumulative injection quantity of steam of the technical scheme that the present invention is provided preheating method early stage of handling up single with routine is substantially suitable,
But preheating time is highly shortened, single-wheel time throughput time is less than 60 days, 360 days or so by conventional method preheating time,
Foreshorten to 270 days or so, effectively reduce the running cost during preheating, also heightened crude output after turn drive, it is considered to actual
Increase the economic benefit of oil, be suitable to promote.
Claims (10)
1. a kind of steam of super-viscous oil horizontal well drives startup method, and which comprises the following steps：
Screening super-heavy oil deposit, it is in the bottom deployment producing well of the super-heavy oil deposit, upper in the middle of adjacent two mouthfuls of producing wells
Side's deployment steam injection well, the producing well and the steam injection well are horizontal well；
Steam being injected in horizontal well, carrying out standing column well preheating, control steam injection pressure is less than formation fracture pressure, until level
Direction near wellbore zone forms stable thermal field；
Horizontal well is preheated using the mode of steam soak, control steam injection pressure is less than formation fracture pressure, until steam injection
Stable thermal field is formed between well and producing well；
To steam injection well continuous steam injection, steam injection rate is stepped up to end value by initial value during continuous steam injection, and controlled
Steam injection pressure is less than formation fracture pressure, while standing column well preheating is carried out to producing well, until between steam injection well and producing well
Temperature reach 50-80 DEG C, and the connecting degree between steam injection well and producing well be more than 50%, complete the steaming of super-viscous oil horizontal well
Vapour drives and starts.
2. method according to claim 1, wherein, the super-heavy oil deposit meets following condition：
Core intersection>8m；Reservoir permeability>600×10-3μm2；Viscosity of crude<40000mPa·s；Oil saturation>65%.
3. method according to claim 1, wherein, during top deployment steam injection well in the middle of adjacent two mouthfuls of producing wells, institute
The vertical distance stated between steam injection well and adjacent two mouthfuls of producing wells is at least 5m.
4. the method according to claim 1 or 3, wherein, during top deployment steam injection well in the middle of adjacent two mouthfuls of producing wells,
The distance between the steam injection well and every mouth producing well in adjacent two mouthfuls of producing wells are 30-40m.
5. method according to claim 1, wherein, the horizontal direction near wellbore zone is included centered on well bore along level
The region formed to external radiation 4-6m by direction；
Preferably, the temperature of the stable thermal field that horizontal direction near wellbore zone is formed is 50-80 DEG C.
6. method according to claim 1 or 5, wherein, steam is injected to horizontal well, when carrying out standing column well and preheating, adopt
Long tube steam injection, short tube is used to adopt the mode of liquid and preheated；
Preferably, steam is injected to horizontal well, when carrying out standing column well preheating, control individual well steam injection amount for 40-60m3/ d, steam injection
Pressure is 4-4.5MPa.
7. method according to claim 1, wherein, steam soak includes three phases, is steam injection stage, stewing well rank respectively
Section and recovery phase；
Preferably, the time in the steam injection stage is 10-15 days, and the time for boiling in a covered pot over a slow fire the well stage is 1-5 days, and the time of recovery phase is
45-120 days.
8. the method according to claim 1 or 7, wherein, horizontal well is preheated using the mode of steam soak, controlled
The steam injection pressure of individual well is 4-4.5MPa, and steam injection rate is 150-180m3/d。
9. method according to claim 1, wherein, the temperature of the stable thermal field formed between the steam injection well and producing well
Spend for 50-80 DEG C.
10. method according to claim 1, wherein, the initial value is 50m3/ d, the end value are 80-120m3/d。
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| CN201611178085.8A CN106593377A (en) | 2016-12-19 | 2016-12-19 | Steam flooding starting method for super-heavy oil horizontal wells |
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| CN106988717A (en) * | 2017-06-10 | 2017-07-28 | 大庆东油睿佳石油科技有限公司 | A kind of ground supply system for underground mixed phase heated fluid generator |
| CN107013198A (en) * | 2017-06-10 | 2017-08-04 | 大庆东油睿佳石油科技有限公司 | A kind of cluster horizontal well net mixed phase hot fluid gravity drainage oil production method |
| CN107013199A (en) * | 2017-06-10 | 2017-08-04 | 大庆东油睿佳石油科技有限公司 | A kind of spontaneous mixed phase hot fluid huff and puff oil recovery method in underground |
| CN107023281A (en) * | 2017-06-10 | 2017-08-08 | 大庆东油睿佳石油科技有限公司 | A kind of spontaneous underground mixed phase hot fluid gravity drainage oil production method |
| CN112065355A (en) * | 2019-12-06 | 2020-12-11 | 中国石油天然气股份有限公司 | Exploitation well pattern and heavy oil reservoir exploitation method of single horizontal well and comb-shaped horizontal well |
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| CN112709558A (en) * | 2019-10-25 | 2021-04-27 | 中国石油天然气股份有限公司 | Method for determining deployment position of steam injection well and method for converting oil reservoir from water drive to steam drive |
| CN112065355A (en) * | 2019-12-06 | 2020-12-11 | 中国石油天然气股份有限公司 | Exploitation well pattern and heavy oil reservoir exploitation method of single horizontal well and comb-shaped horizontal well |
| CN112412412A (en) * | 2020-12-10 | 2021-02-26 | 中国石油天然气股份有限公司 | Method and device for determining starting conditions of ultra-thick oil steam drive-rotation drive |
| CN112412412B (en) * | 2020-12-10 | 2022-10-04 | 中国石油天然气股份有限公司 | Method and device for determining starting conditions of ultra-thick oil steam drive-rotation drive |
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