CN106593375A - Hot exploitation method for exploiting gas-cap super-heavy oil reservoirs - Google Patents
Hot exploitation method for exploiting gas-cap super-heavy oil reservoirs Download PDFInfo
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- 239000000295 fuel oil Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000003921 oil Substances 0.000 claims abstract description 115
- 238000010796 Steam-assisted gravity drainage Methods 0.000 claims abstract description 40
- 239000010779 crude oil Substances 0.000 claims abstract description 18
- 238000012216 screening Methods 0.000 claims abstract description 5
- 238000002347 injection Methods 0.000 claims description 52
- 239000007924 injection Substances 0.000 claims description 52
- 230000008569 process Effects 0.000 claims description 25
- 238000011084 recovery Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 230000002045 lasting effect Effects 0.000 claims description 6
- 230000035699 permeability Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 16
- 230000008901 benefit Effects 0.000 abstract description 9
- 238000002485 combustion reaction Methods 0.000 abstract description 8
- 238000011065 in-situ storage Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 44
- 238000005516 engineering process Methods 0.000 description 17
- 230000000694 effects Effects 0.000 description 9
- 238000010793 Steam injection (oil industry) Methods 0.000 description 7
- 238000011161 development Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
Classifications
-
- 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
- E21B43/2406—Steam assisted gravity drainage [SAGD]
- E21B43/2408—SAGD in combination with other methods
-
- 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
- E21B43/243—Combustion in situ
-
- 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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- Life Sciences & Earth Sciences (AREA)
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- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The invention provides a hot exploitation method for exploiting gas-cap super-heavy oil reservoirs; the method comprises the steps of screening out an oil reservoir, deploying a well network, carrying out steam huff-puff, and combusting an oil layer and injecting air. According to the hot exploitation method for exploiting gas-cap super-heavy oil reservoirs, the techniques such as SAGD (steam-assisted gravity drainage), in-situ combustion of oil and gas-assisted SAGD are effectively combined and used in gas-cap heavy oil reservoirs, and low-cost high-benefit exploitation is achieved. The method has the advantages that steam usage can be reduced, crude oil quality can be improved, a gas drainage passage can be enlarged, crude oil can also be pressurized into a horizontal production well through gas-cap expansion, accelerated oil drainage and reduced production cost are achieved, and good economic benefit is provided.
Description
Technical field
The present invention relates to technical field of petroleum extraction, a kind of particularly thermal recovery side of exploitation pneumatic jack super―heavy oil oil reservoir
Method.
Background technology
SAGD (Steam Assisted Gravity Drainage, SAGD) is develop viscous crude one
Item cutting edge technology, the technology needs the steam of high mass dryness fraction to be continuously injected into, and the higher oil recovery effect of steam quality is more obvious, the steaming of formation
Vapour chamber constantly extends heated oil reservoir, and crude oil is plucked out of together with condensed water.At present heavy crude reservoir is exploited with SAGD technologies, is needed
Quantity of steam it is big, how high cost effectively reduces steam consumption, improves oil production, is to reduce production cost, increases economic efficiency
Key.
Name Resolution：
Combustion in situ：Point to and inject in oil reservoir air and reach a high temperature burning, crack a portion heavy component as combustion
Expect to provide the heavy crude heat extraction technology that heat is recovered the oil in oil reservoir.
SAGD：It is a kind of effective development technique of super-viscous oil raising recovery ratio also known as SAGD.To steam
Vapour is thermal source, Jing injection wells injection stratum, upwards and side moves to vapor chamber draining interface, reduces viscosity of crude, makes crude oil
Under gravity stream is to producing well.
Gas aids in SAGD：N is injected in SAGD vapor chamber2、CO2、CH4Deng pure gases or combination gas, reach
Maintain steam chamber pressure to stablize, reduce viscosity of crude, improve gas oil ratio, reduce steam consumption, the one kind increased economic efficiency
Technology.
The content of the invention
In order to solve the problems, such as that the super―heavy oil oil reservoir with pneumatic jack is difficult to exploit, the invention provides a kind of exploitation pneumatic jack
The thermal process of super―heavy oil oil reservoir, the thermal process of the exploitation pneumatic jack super―heavy oil oil reservoir is by by SAGD, combustion in situ, gas
The technologies such as body auxiliary SAGD are effectively combined, and in applying to the heavy crude reservoir of pneumatic jack, realize low cost, the exploitation of high yield.This
The method of kind can both reduce steam consumption, improve crude quality, increase gas drain path, can be acted on using gas cap enlargement again
Crude oil is pressed into into horizontal production well, quickening draining speed is reached, production cost purpose is reduced, with preferable economic benefit.
The technical solution adopted for the present invention to solve the technical problems is：A kind of thermal recovery of exploitation pneumatic jack super―heavy oil oil reservoir
Method, comprises the following steps：
Step 1, screening oil reservoir；
Select the super―heavy oil oil reservoir containing pneumatic jack layer；
Step 2, deployment well pattern；
Two pairs of horizontal wells, two pairs of horizontal well left-right situs, in two couple are set in the oil reservoir of the super―heavy oil oil reservoir
Deployment auxiliary gas injection well between horizontal well, the auxiliary gas injection well is a bite horizontal well or row's straight well；
Step 3, two pairs of horizontal wells implement SAGD exploitations, and the auxiliary gas injection well carries out steam soak；
Step 4, the two pairs of horizontal wells implement SAGD exploitations, light oil reservoir by the auxiliary gas injection well and lasting to this
Injection air in auxiliary gas injection well.
The invention has the beneficial effects as follows：
1st, improve economic benefit：Because fireflood process injection gas is air in the method, aboundresources, price is low.
Under normal circumstances, SAGD recovery gas-oil ratios are 0.25, if daily output 80t is oily, need day steam injection 320t steam；Using this technology
Per 300Sm3Air can be with output 1t crude oil, gas injection well day injection 12000m3Air, the bar of SAGD well pair day steam injection amount 160t
Under part, it becomes possible to realize the productive target of day oil-producing 80t, 160t steam is saved with the technology day with pure exploitation via steam injection,
0.20 yuan/m of air price3, under conditions of 150 yuan/t of steam price, 21600 yuan of expense can be saved daily, substantially increase Jing
Ji development benefit.
2nd, crude quality is improved：Because the more simple SAGD/Drive of combustion in situ has higher temperature, crude oil is set to exist
Crack under hot conditionss, therefore, improve the quality of extraction oil.
3rd, injector producer distance is reduced：Conventional fireflood must be such that crude oil shifts onto at producing well could be by crude oil output, and the skill
Art is by the horizontal well production in SAGD, while after vapor chamber and Huo Qiang UNICOMs, largely reducing note and adopting distance, when taking effect
Between it is short.
4th, recovery percent of reserves is high：The technology maintains gas-cap drive, at the same using gravity drainage effect, gas onlap effect with
High temperature viscosity reduction is acted on, and the crude oil that heat front feeds through to farthest is produced, and improves development degree.
Description of the drawings
The Figure of description for constituting the part of the application is used for providing a further understanding of the present invention, and the present invention's shows
Meaning property embodiment and its illustrated for explaining the present invention, does not constitute inappropriate limitation of the present invention.
Fig. 1 be the exploitation pneumatic jack super―heavy oil oil reservoir thermal process used in a bite horizontal well as auxiliary gas injection well when
Dimensional structure diagram.
Fig. 2 be the exploitation pneumatic jack super―heavy oil oil reservoir thermal process used in a bite horizontal well as auxiliary gas injection well when
Section structure schematic diagram.
Fig. 3 be the exploitation pneumatic jack super―heavy oil oil reservoir thermal process used in row's straight well as auxiliary gas injection well when
Dimensional structure diagram.
Fig. 4 be the exploitation pneumatic jack super―heavy oil oil reservoir thermal process used in row's straight well as auxiliary gas injection well when
Section structure schematic diagram.
1st, pneumatic jack layer；2nd, oil reservoir；
11st, first pair of horizontal well；12nd, second pair of horizontal well；
21st, horizontal well；22nd, straight well；
31st, vapor chamber；32nd, fiery chamber.
Specific embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Below with reference to the accompanying drawings and in conjunction with the embodiments describing the present invention in detail.
A kind of thermal process of exploitation pneumatic jack super―heavy oil oil reservoir, comprises the following steps：
Step 1, screening oil reservoir；
Select the super―heavy oil oil reservoir containing pneumatic jack layer 1；
Step 2, deployment well pattern；
Two pairs of horizontal wells, two pairs of horizontal well left-right situs, in two couple are set in the oil reservoir 2 of the super―heavy oil oil reservoir
Deployment auxiliary gas injection well between horizontal well, the auxiliary gas injection well is the row's straight well 22 of a bite horizontal well 21 or；
Step 3, two pairs of horizontal wells are according to normal mode pipeline start up by preheating and implement SAGD exploitations, and the auxiliary gas injection well is carried out
Steam soak；
Step 4, two pairs of horizontal wells are according to normal mode pipeline start up by preheating and implement SAGD exploitations, by the auxiliary gas injection well
Light oil reservoir 2 and lasting inject air into the auxiliary gas injection well.
The oil production method that the present invention effectively combines SAGD technologies, gas auxiliary SAGD and fireflood technology, this method can
Steam injection amount is greatly reduced, production cost is saved, the ultimate recovery of oil reservoir is improved, with good economic benefit.
In step 1, the thickness of the pneumatic jack layer 1 of the super―heavy oil oil reservoir is more than 2m.The depth of the super―heavy oil oil reservoir
Degree is more than 200m, and the thickness of the oil reservoir 2 of the super―heavy oil oil reservoir is more than 15m, and the permeability of the oil reservoir 2 of the super―heavy oil oil reservoir is big
In 200 × 10-3μm2.The viscosity of the Crude Oil of oil reservoir 2 of the super―heavy oil oil reservoir is more than 10000mPa.s when 50 DEG C, and the spy is super thick
The density of the Crude Oil of oil reservoir 2 of oil reservoir is more than 0.90g/cm3, the oil saturation of the oil reservoir 2 of the super―heavy oil oil reservoir is more than
60%.
Realizing the condition of the technology is：Gas, temperature, pneumatic jack.Therefore note aboundresources, the air of low cost is selected to carry out
Fireflood, injection air and underground crude oil high-temperature oxydation, can be reached for vapor chamber provided auxiliary gas (21%CO2And 79%N2)
With the purpose of heat, can significantly reduce steam consumption, increase economic efficiency.
In step 2, two pairs of horizontal wells are respectively first pair of horizontal well 11 and second pair of horizontal well 12, first pair of level
Well 11 and the second pair of horizontal well 12 are respectively positioned on the bottom of oil reservoir 2, and first pair of horizontal well 11 is parallel with second pair of horizontal well 12, and first
Horizontal well 11 is made up of two mouthfuls of water horizontal wells being parallel to each other up and down, second pair of horizontal well 12 is by the Liang Koushui being parallel to each other up and down
Horizontal well is constituted.The distance between two mouthfuls of water horizontal wells up and down of the first pair of horizontal well 11 are 4m～8m, the second pair of horizontal well 12 it is upper
The distance between lower two mouthfuls of water horizontal wells are also 4m～8m, and first positioned at bottom in horizontal well 11 and second pair of horizontal well 12 to adopting
Profit horizontal well to the distance on the bottom circle of oil reservoir 2 is 1m～1.5m.
In step 2, the auxiliary gas injection well is located at the centre of two pairs of horizontal wells, when the auxiliary gas injection well is a bite level
During well 21, as depicted in figs. 1 and 2, horizontal well 21 is parallel with first pair of horizontal well 11, the depth of horizontal well 21 and first pair of level
The depth of superposed gas-injection horizontal well is identical in well 11.Or, when the auxiliary gas injection well is row's straight well 22, such as Fig. 3
With shown in Fig. 4, the row straight well 22 is parallel with first pair of horizontal well 11, in the row straight well 22 between two mouthfuls of adjacent straight wells
Distance is 80m～100m, and the row straight well 22 contains and penetrate containing the active section positioned at oil reservoir 2, the middle part and bottom of the active section
Hole section, the thickness that the specific row straight well penetrates out oil reservoir bottom 2/3 is exploited, i.e., under the position of the perforated interval and oil reservoir
2/3 thickness is corresponding.
In step 3, the quantity of the steam soak is 2 rounds or 3 rounds, it is ensured that this is auxiliary after the steam soak
Help between gas injection well and pneumatic jack layer 1 and realize thermal communication.
In step 4, inject high temperature air using chemic ignition or electric ignition mode to light around the auxiliary gas injection well
Oil reservoir 2, light in the backward auxiliary gas injection well and be continuously injected into normal temperature air, it is ensured that fiery chamber physically well develops, live wire constantly to
SAGD Horizontal Wells are stably advanced to (first pair of horizontal well 11 and second pair of horizontal well 12), and the hot flue gases of generation are constantly entered
SAGD horizontal well pair steam intracavity.When the auxiliary gas injection well is row's straight well 22, oil reservoir 2 is lighted by the row straight well 22
Middle part and bottom, and lasting inject normal temperature air into the row straight well 22.
The thermal process of the exploitation pneumatic jack super―heavy oil oil reservoir also includes step 5：
Step 5, until the fiery chamber development that produces of the auxiliary gas injection well is to SAGD horizontal well pairs (first pair of horizontal well 11 and the
Two pairs of horizontal wells 12) near, oxygen break through to horizontal production well (first pair of horizontal well 11 and the second pair of middle and lower part of horizontal well 12
Horizontal production well), terminate production.
The thermal process of the exploitation pneumatic jack super―heavy oil oil reservoir is organic by SAGD technologies, gas auxiliary SAGD and fireflood technology
With reference in being effectively applied to pneumatic jack super―heavy oil Tibetan, the more conventional SAGD of the technology, conventional fire flood have advantages below
Reason is：
1st, routine SAGD technology steam injection amounts are larger, and producing cost is high, and conventional fireflood vertical heterogeneity affects serious, displacement
Uneven, gas onlap is serious, and live wire propulsion is unstable.
2nd, the present invention effectively modification in-place oil, greatly reduces steam injection, cost-effective, improves exploiting economy effect
Benefit.
3rd, the present invention can balance vertical heterogeneity with the effect of effectively utilizes gas onlap by moveable oil press-in horizontal well extraction
Limitation；And can increase discharge of gas passage after vapor chamber and Huo Qiang UNICOMs, and increase gas onlap ability, accelerate draining speed
Degree, improves recovery percent of reserves, may finally obtain low cost, high yield, high recovery percent of reserves, the effect of high quality crude oil.
Specifically introduce the thermal process of the exploitation pneumatic jack super―heavy oil oil reservoir by taking the oil reservoir of Liaohe Oil Field as an example below, it is described
The thermal process of exploitation pneumatic jack super―heavy oil oil reservoir is comprised the following steps：
Step 1, screening oil reservoir；
Select the super―heavy oil oil reservoir containing pneumatic jack layer 1, oil reservoir depth 800m, oil reservoir mean reservoir pressure 8.0MPa；
28.4 DEG C of formation temperature；The thickness 5m of pneumatic jack layer 1；The thickness 30m of oil reservoir 2；Porosity 30%；Reservoir permeability 3000mD；Oil reservoir
At a temperature of average viscosity of crude 300090mPa.s；Oil density 0.9662g/cm3；Oil saturation 75.2%
Step 2, deployment well pattern；
Two pairs of horizontal wells, two pairs of horizontal well left-right situs, two pairs of water are set in the oil reservoir 2 of the super―heavy oil oil reservoir
Bottom of the horizontal well of every a pair of horizontal wells middle and lower part away from oil reservoir 2 is 1.0m～1.5m in horizontal well, in two pairs of horizontal wells
Between dispose row's straight well 22, the distance in the row straight well 22 between two mouthfuls of adjacent straight wells be 100m.
Step 3, two pairs of horizontal wells implement SAGD exploitations, and the row straight well 22 carries out round～3 round of steam soak 2；
Step 4, the two pairs of horizontal wells implement SAGD exploitations, by the row straight well 22 light oil reservoir 2 and it is lasting to
Injection air in the auxiliary gas injection well.Specifically, by gas injection well (the top gas injection level in first pair of horizontal well 11 in SAGD
Top gas-injection horizontal well in well and second pair of horizontal well 12) continuous steam injection, SAGD is carried out, meanwhile, in
Between row's straight well 22 oil reservoir of straight well middle and lower part is lighted according to conventional fireflood method, and to continuous air injection in row's straight well 22
Oil reservoir inside normal combustion is maintained, flue gas (21%CO is produced2And 79%N2) SAGD well pair is entered by the pneumatic jack layer 1 on top
The vapor chamber of (first pair of horizontal well 11 and second pair of horizontal well 12).Crude oil is produced by horizontal production well.
After step 5, production certain hour, combustion front is advanced near horizontal production well, terminates combustion drive.By about
300m3Product 1t is oily for air, 10 years accumulative injection air 8.76 × 107m3, add up to increase oil 29.2 × 104T, adds up steam saving
1.17×106T, about 150 yuan/t of steam cost, about 0.2 yuan/m of air cost3, add up cost-effective 1.6 × 108Unit, economy effect
It is beneficial good, it is suitable to promote.
SAGD technologies, gas are aided in SAGD and fireflood technique to high-efficiency by the thermal process of the exploitation pneumatic jack super―heavy oil oil reservoir
With reference to the short distance production plus the low cost of air injection fireflood using SAGD obtains higher economic benefit.Meanwhile, pneumatic jack, vapour
The modification effect that chamber, the UNICOM in fiery chamber and fireflood originally have, accelerates draining speed, improves the recovery percent of reserves of crude oil.
The above, specific embodiment only of the invention, it is impossible to the scope that its restriction invention is implemented, so its equivalent
The displacement of component, or the equivalent variations made according to scope of patent protection of the present invention and modification, should all still fall within what this patent was covered
Category.In addition, between the technical characteristic and technical characteristic in the present invention, between technical characteristic and technical scheme, technical scheme with
Can be used with independent assortment between technical scheme.
Claims (10)
1. it is a kind of exploitation pneumatic jack super―heavy oil oil reservoir thermal process, it is characterised in that the exploitation pneumatic jack super―heavy oil oil reservoir
Thermal process comprise the following steps：
Step 1, screening oil reservoir；
Select the super―heavy oil oil reservoir containing pneumatic jack layer (1)；
Step 2, deployment well pattern；
Two pairs of horizontal wells, two pairs of horizontal well left-right situs, in two pairs of water are set in the oil reservoir (2) of the super―heavy oil oil reservoir
Deployment auxiliary gas injection well between horizontal well, the auxiliary gas injection well is a bite horizontal well (21) or row's straight well (22)；
Step 3, two pairs of horizontal wells implement SAGD exploitations, and the auxiliary gas injection well carries out steam soak；
Step 4, the two pairs of horizontal wells implement SAGD exploitations, light oil reservoir (2) by the auxiliary gas injection well and lasting to this
Injection air in auxiliary gas injection well.
2. it is according to claim 1 exploitation pneumatic jack super―heavy oil oil reservoir thermal process, it is characterised in that in step 1,
The thickness of the pneumatic jack layer (1) of the super―heavy oil oil reservoir is more than 2m.
3. it is according to claim 2 exploitation pneumatic jack super―heavy oil oil reservoir thermal process, it is characterised in that in step 1,
The depth of the super―heavy oil oil reservoir is more than 200m, and the thickness of the oil reservoir (2) of the super―heavy oil oil reservoir is more than 15m, and the spy is super thick
The permeability of the oil reservoir (2) of oil reservoir is more than 200 × 10-3μm2。
4. it is according to claim 2 exploitation pneumatic jack super―heavy oil oil reservoir thermal process, it is characterised in that spy when 50 DEG C
The viscosity of oil reservoir (2) Crude Oil of super-heavy oil deposit is more than 10000mPa.s, oil reservoir (2) Crude Oil of the super―heavy oil oil reservoir
Density is more than 0.90g/cm3, the oil saturation of the oil reservoir (2) of the super―heavy oil oil reservoir is more than 60%.
5. it is according to claim 1 exploitation pneumatic jack super―heavy oil oil reservoir thermal process, it is characterised in that in step 2,
Two pairs of horizontal wells are respectively first pair of horizontal well (11) and second pair of horizontal well (12), first pair of horizontal well (11) and second pair
Horizontal well (12) is respectively positioned on the bottom of oil reservoir (2), and first pair of horizontal well (11) is parallel with second pair of horizontal well (12), first pair of water
Horizontal well (11) is made up of two mouthfuls of water horizontal wells being parallel to each other up and down, and second pair of horizontal well (12) is by the Liang Koushui being parallel to each other up and down
Horizontal well is constituted.
6. it is according to claim 5 exploitation pneumatic jack super―heavy oil oil reservoir thermal process, it is characterised in that first pair of level
The distance between two mouthfuls of water horizontal wells up and down of well (11) are 4m～8m, up and down between two mouthfuls of water horizontal wells of the second pair of horizontal well (12)
Distance be also 4m～8m, the oil recovery horizontal well in first pair of horizontal well (11) and second pair of horizontal well (12) positioned at bottom is to oily
The distance on the bottom circle of layer (2) is 1m～1.5m.
7. it is according to claim 6 exploitation pneumatic jack super―heavy oil oil reservoir thermal process, it is characterised in that the auxiliary gas injection
Well location in the centre of two pairs of horizontal wells, when the auxiliary gas injection well is a bite horizontal well (21), horizontal well (21) with first pair
Horizontal well (11) is parallel, the depth of superposed gas-injection horizontal well in the depth of horizontal well (21) and first pair of horizontal well (11)
It is identical.
8. it is according to claim 6 exploitation pneumatic jack super―heavy oil oil reservoir thermal process, it is characterised in that the auxiliary gas injection
Well location is in the centre of two pairs of horizontal wells, when the auxiliary gas injection well is row's straight well (22), row straight well (22) and first
Parallel to horizontal well (11), the distance between two mouthfuls of adjacent straight wells are 80m～100m in row straight well (22), and a row is straight
Well (22) is penetrated out the thickness of oil reservoir (2) bottom 2/3 and is exploited.
9. it is according to claim 1 exploitation pneumatic jack super―heavy oil oil reservoir thermal process, it is characterised in that in step 3,
The quantity of the steam soak is 2 rounds or 3 rounds, after the steam soak auxiliary gas injection well and pneumatic jack layer (1) it
Between realize thermal communication.
10. it is according to claim 1 exploitation pneumatic jack super―heavy oil oil reservoir thermal process, it is characterised in that in step 4
In, when the auxiliary gas injection well is row's straight well (22), the middle part and bottom of oil reservoir (2) are lighted by row straight well (22),
And the lasting injection normal temperature air into row straight well (22).
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106968649A (en) * | 2017-04-27 | 2017-07-21 | 中国石油天然气股份有限公司 | The ignition method and recovery method of channeling oil reservoir |
| CN107178349A (en) * | 2017-07-04 | 2017-09-19 | 中国石油天然气股份有限公司 | It is a kind of to improve the method and device of fireflood assisted gravity drainage exploitation effect |
| CN108868718A (en) * | 2018-07-09 | 2018-11-23 | 中国石油天然气股份有限公司 | A kind of combination thermal process having gas-cap heavy oil reservoir |
| CN111119820A (en) * | 2018-10-30 | 2020-05-08 | 中国石油天然气股份有限公司 | SAGD oil recovery method |
| CN112855103A (en) * | 2021-04-01 | 2021-05-28 | 中国石油天然气股份有限公司 | Recovery method of super heavy oil reservoir and arrangement method of steam injection well |
| CN114382451A (en) * | 2020-10-19 | 2022-04-22 | 中国石油天然气股份有限公司 | SAGD oil production method and enhanced oil production well pattern |
| CN114592847A (en) * | 2020-12-07 | 2022-06-07 | 中国石油化工股份有限公司 | Thick-layer oil reservoir heavy oil development method based on combustion-assisted gravity drainage |
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| WO2012119076A2 (en) * | 2011-03-03 | 2012-09-07 | Conocophillips Company | In situ combustion following sagd |
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| CN107178349B (en) * | 2017-07-04 | 2019-12-10 | 中国石油天然气股份有限公司 | Method and device for improving mining effect of fireflooding assisted gravity drainage |
| CN108868718A (en) * | 2018-07-09 | 2018-11-23 | 中国石油天然气股份有限公司 | A kind of combination thermal process having gas-cap heavy oil reservoir |
| CN111119820A (en) * | 2018-10-30 | 2020-05-08 | 中国石油天然气股份有限公司 | SAGD oil recovery method |
| CN114382451A (en) * | 2020-10-19 | 2022-04-22 | 中国石油天然气股份有限公司 | SAGD oil production method and enhanced oil production well pattern |
| CN114592847A (en) * | 2020-12-07 | 2022-06-07 | 中国石油化工股份有限公司 | Thick-layer oil reservoir heavy oil development method based on combustion-assisted gravity drainage |
| CN112855103A (en) * | 2021-04-01 | 2021-05-28 | 中国石油天然气股份有限公司 | Recovery method of super heavy oil reservoir and arrangement method of steam injection well |
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