CN106640012A - Fireflooding oil-extracting method for exploiting super heavy oil reservoir with bottom water - Google Patents
Fireflooding oil-extracting method for exploiting super heavy oil reservoir with bottom water Download PDFInfo
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- CN106640012A CN106640012A CN201611087124.3A CN201611087124A CN106640012A CN 106640012 A CN106640012 A CN 106640012A CN 201611087124 A CN201611087124 A CN 201611087124A CN 106640012 A CN106640012 A CN 106640012A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 239000000295 fuel oil Substances 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000003921 oil Substances 0.000 claims abstract description 116
- 239000010779 crude oil Substances 0.000 claims abstract description 22
- 238000012216 screening Methods 0.000 claims abstract description 6
- 238000000605 extraction Methods 0.000 claims description 7
- 238000010793 Steam injection (oil industry) Methods 0.000 claims description 4
- 230000035699 permeability Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 210000003296 saliva Anatomy 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 238000011084 recovery Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000011010 flushing procedure Methods 0.000 abstract 1
- 230000000638 stimulation Effects 0.000 abstract 1
- 238000002347 injection Methods 0.000 description 13
- 239000007924 injection Substances 0.000 description 13
- 238000002485 combustion reaction Methods 0.000 description 10
- 238000006073 displacement reaction Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 108091006146 Channels Proteins 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 102000010637 Aquaporins Human genes 0.000 description 1
- 108010063290 Aquaporins Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012360 testing method 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
- E21B43/243—Combustion in situ
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- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Edible Oils And Fats (AREA)
Abstract
The invention provides a fireflooding oil-extracting method for exploiting a super heavy oil reservoir with bottom water. The method comprises the following steps of oil reservoir screening, well pattern arranging, steam stimulation, crude oil fireflooding and crude oil extracting. According to the fireflooding oil-extracting method for exploiting the super heavy oil reservoir with the bottom water, fireflooding oil extracting is conducted by adoption of different well pattern combination modes and different perforation modes, a bottom water layer is provided with flowing channels for the three phases of oil, gas and water in the fireflooding process, gas overlapping can be effectively controlled, fire line advancing is stable, and the purposes of uniform longitudinal producing, high oil flushing efficiency, high recovery efficiency, low production cost and good economic benefits are achieved.
Description
Technical field
The present invention relates to technical field of petroleum extraction, particularly a kind of fire flood of exploitation bottom water super―heavy oil oil reservoir
Method.
Background technology
Fireflood technology is a kind of method of raising recovery ratio, and it is by injecting air toward oil reservoir, using oil reservoir Central Plains
A part of heavy ingredient of oil makees fuel, and heat of constantly burning displaces the crude oil in oil reservoir.Test proves that, in oil reservoir
The residual oil saturation of combustion zone is almost nil, and recovery ratio is up to 85%～90%.
Fireflood process is substantially the process that combustion front is slowly advanced from injection well to a bite or several mouthfuls of producing wells.This
Process is that an injection well for being arranged in center from air injection starts, and has one group of producing well around injection well.Formed
After to the penetrating power of gas, combustion front is just from injection well to moving radially.
But big for super―heavy oil oil reservoir, exploitation difficulty, because viscosity of crude is high, poor fluidity, displacement pressure is high, and difficulty is adopted
Exploited with the mode of direct fireflood.
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.
Bottom water reservoir：It is oil reservoir to have bottom water, top for bottom, a kind of oil reservoir that bottom water is connected with oil reservoir.
The content of the invention
In order to solve the problems, such as that the super―heavy oil oil reservoir with bottom water is difficult to exploit, the invention provides a kind of exploitation bottom water
The fire flood method of super―heavy oil oil reservoir, the fire flood method of the exploitation bottom water super―heavy oil oil reservoir is by the way that fireflood is developed
Mode is applied in the water super―heavy oil oil reservoir of bottom, solves the problems, such as that super―heavy oil does not have safe and reliable fireflood technology, in addition
Can control during fireflood that gas onlap is serious, the propulsion of combustion front live wire is unstable, vertical heterogeneity affects serious asking
Topic.Simultaneously flue gas and crude oil Jing bottom aquifers are discharged, and can effectively suppress bottom water coning, accelerate draining speed, improve extraction journey
Degree, reaches low cost, the exploitation purpose of high yield.
The technical solution adopted for the present invention to solve the technical problems is：A kind of fireflood of exploitation bottom water super―heavy oil oil reservoir
Oil production method, comprises the following steps：
Step 1, screening oil reservoir；
Select the super―heavy oil oil reservoir containing bottom aquifer；
Step 2, deployment well pattern；
Two mouthfuls of water horizontal wells of deployment, the horizontal segment of two mouthfuls of water horizontal wells is respectively positioned in the oil reservoir of the super―heavy oil oil reservoir；Or,
Two row's straight wells are disposed, the active section of the two rows straight well is located in the oil reservoir of the super―heavy oil oil reservoir；
Step 3, steam soak；
Step 4, fireflood crude oil；
Step 5, extraction crude oil.
The invention has the beneficial effects as follows：
1st, devising different well pattern integrated mode and perforating modes carries out fire flood, gas-injection horizontal well or straight well cloth
Put at the middle part of oil reservoir, oil recovery level of production well or straight well are arranged in the bottom of oil reservoir.
2nd, the technology can make full use of bottom aquaporin effective control gas onlap, live wire is stably advanced, while by
Bottom coolant-temperature gage is low to interact with the high temperature that burning is produced, and accelerates flowing velocity, improves recovery ratio.
3rd, the present invention can realize that safely and efficiently fireflood is developed in super―heavy oil is hidden, and rate of oil production is big, and recovery ratio is high,
With higher economic benefit.
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 is that the fire flood method of the exploitation bottom water super―heavy oil oil reservoir uses stereochemical structure during dual horizontal well to illustrate
Figure.
Fig. 2 is that the fire flood method of the exploitation bottom water super―heavy oil oil reservoir uses section structure during dual horizontal well to illustrate
Figure.
Fig. 3 is that the fire flood method of the exploitation bottom water super―heavy oil oil reservoir uses stereochemical structure during double straight well to illustrate
Figure.
1st, bottom aquifer；2nd, oil reservoir；
11st, first horizontal well；12nd, second mouthful of water horizontal well；
21st, first row straight well；22nd, second row straight well.
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 fire flood method of exploitation bottom water super―heavy oil oil reservoir, comprises the following steps：
Step 1, screening oil reservoir；
Select the super―heavy oil oil reservoir containing bottom aquifer 1；
Step 2, deployment well pattern；
Two mouthfuls of water horizontal wells of deployment, the horizontal segment of two mouthfuls of water horizontal wells is respectively positioned in the oil reservoir 2 of the super―heavy oil oil reservoir, is such as schemed
Shown in 1 and Fig. 2；Or, two row's straight wells are disposed, the active section of the two rows straight well is located in the oil reservoir 2 of the super―heavy oil oil reservoir, such as
Shown in Fig. 3；
Step 3, steam soak；
Step 4, fireflood crude oil；
Step 5, extraction crude oil.
The fire flood method of the exploitation bottom water super―heavy oil oil reservoir by different well pattern integrated mode and perforating modes,
With reference to bottom aquifer as oil, gas and water circulation passage, efficient fire flood is realized.Meanwhile, gravity drainage effect can reduce displacement
Distance, can effective control gas onlap, live wire alter into, burn uneven the problems such as, reach longitudinal direction and employ uniform, oil displacement efficiency
High, recovery ratio is big, low production cost, good in economic efficiency purpose.
In step 1, by following standard screening heavy crude reservoir：The depth of the super―heavy oil oil reservoir is more than 200m, the spy
The thickness of the oil reservoir 2 of super-heavy oil deposit is more than 10m, and the permeability of the oil reservoir 2 of the super―heavy oil oil reservoir is more than 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, in the oil reservoir 2 of the super―heavy oil oil reservoir
The density of crude oil is more than 0.90g/cm3, the oil saturation of the oil reservoir 2 of the super―heavy oil oil reservoir is more than 50%.
In step 2, when two mouthfuls of water horizontal wells are disposed, two mouthfuls of water horizontal wells are respectively first horizontal well 11 and second mouthful
Horizontal well 12, first horizontal well 11 is steam injection well, and second mouthful of water horizontal well 12 is producing well, the horizontal segment of first horizontal well 11
Positioned at the top of second mouthful of horizontal segment of water horizontal well 12, the top of the horizontal segment of second mouthful of water horizontal well 12 is located in oil reservoir 2, second mouthful
The horizontal segment of horizontal well 12 is located at the bottom of oil reservoir 2, the horizontal segment of second mouthful of water horizontal well 12 with a distance from bottom aquifer 1 for 0.5m～
In 1.0m, as shown in Figure 2.
Specifically, the horizontal segment of first horizontal well 11 is located at the oblique upper of second mouthful of horizontal segment of water horizontal well 12, second mouthful
Volume of the volume on the top of the horizontal segment of horizontal well 12 more than the bottom of the horizontal segment of second mouthful of water horizontal well 12.I.e.
The volume that the horizontal segment of second mouthful of water horizontal well 12 is located in oil reservoir 2 is located at the volume in bottom aquifer 1 more than it.
Or, in step 2, when two row's straight wells is disposed, the two rows straight well is respectively first row straight well 21 and second row
Straight well 22, first row straight well 21 is parallel with second row straight well 22, and the straight well in first row straight well 21 is steam injection well, and second row is straight
Straight well in well 22 is producing well, and the lower end of second row straight well 22 is respectively positioned in bottom aquifer 1.The middle and upper part of first row straight well 21 is penetrated
Hole, the middle and lower part perforation of second row straight well 22, minimum perforating site is from bottom water 0.5m～1.0m.
In step 3, the quantity of the steam soak be 2 round～3 rounds, after the steam soak oil reservoir 2 with
Thermal communication is realized between bottom aquifer 1.
In step 4, can with using chemic ignition or electric ignition mode to gas injection well (first horizontal well 11 or the
One row's straight well 21) in injection high temperature air to light the oil reservoir around gas injection well, normal temperature air is continuously injected into after lighting, it is ensured that fire
Chamber physically well develops, the continuous Forward stability propulsion of live wire, burns the life that displacement crude oil is constantly flowed into opposite side along bottom bottom aquifer 1
Produce near well (second mouthful of water horizontal well 12 or second row straight well 22).
In steps of 5, crude oil is produced in time by producing well (second mouthful of water horizontal well 12 or second row straight well 22), until
Combustion front is advanced near the producing well, terminates combustion drive.
The fire flood method of the exploitation bottom water super―heavy oil oil reservoir effectively combines steam soak and fireflood technology, utilizes
The characteristics of super―heavy oil oil reservoir bottom has bottom water, carries out super―heavy oil oil reservoir development, more often using bottom aquifer as flow channel
Advising the reasons why super―heavy oil oil reservoir development has advantages below is：
1st, when the fireflood of conventional super―heavy oil oil reservoir is exploited, gas onlap is serious, and displacement distance is remote, slowly effect, longitudinal displacement
It is uneven.
2nd, the present invention makes crude oil flow to level along bottom aquifer in bottom water super―heavy oil oil reservoir using the effect of fireflood gravity drainage
Producing well, accelerates draining speed, reduces displacement distance.
3rd, the flue gas Jing oil reservoir bottom bottom aquifer that burning is produced flows into horizontal production well and is adopted together with crude oil, bottom water
Go out, expand discharge of gas passage, effective control gas onlap solves that live wire propulsion is unstable, longitudinal displacement is uneven asks
Topic.
4th, burn initial stage bottom aquifer and provide flow channel for oil, gas and water, with burning propulsion, the high temperature for producing that burns adds
Hot bottom water, bottom aquifer forms high temperature circulation passage, accelerates the flowing of oil, gas and water, improves rate of oil production and economic benefit.
Introduce the fire flood method of the exploitation bottom water super―heavy oil oil reservoir by taking Xinjiang Oilfield oil reservoir as an example below:
Step 1, screening oil reservoir；
Oil reservoir depth 280m；Oil reservoir mean reservoir pressure 2.8MPa；17.4 DEG C of formation temperature；Core intersection 25m；Bottom water
Thickness 10m；Porosity 31.5%；Reservoir permeability 1276mD；Average viscosity of crude 210090mPa.s under formation temperature；Crude oil
Density 0.9662g/cm3；Oil saturation 75.2%.
Step 2, deployment well pattern；
First in the gas-injection horizontal well of the horizontal segment length 400m of the middle part of oil reservoir 2 (away from oil reservoir bottom 12.5m) deployment a bite, away from
The level of production well of a bite 400m that is arranged in parallel at gas-injection horizontal well horizontal range 200m length, horizontal well is arranged in oil reservoir bottom and connects
Near nearly bottom aquifer 1.
Step 3, steam soak；
Gas-injection horizontal well first injects the round of steam soak two, adds up injection steam 20000t.
Step 4, fireflood crude oil；
500 DEG C of high temperature airs are injected using electric igniter and lights net horizontal section oil reservoir, be then continuously injected into air, proceed to fire
Drive mining phase.Ensure that fiery chamber physically well develops, the continuous Forward stability propulsion of live wire burns displacement crude oil constantly along bottom bottom aquifer
It is flowed near the horizontal production well of opposite side.
Step 5, extraction crude oil.
Crude oil is produced by horizontal production well, and after producing certain year, combustion front is advanced near horizontal production well, is terminated
Combustion drive.
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 (9)
1. a kind of fire flood method of exploitation bottom water super―heavy oil oil reservoir, it is characterised in that the exploitation bottom water super―heavy oil
The fire flood method of oil reservoir is comprised the following steps：
Step 1, screening oil reservoir；
Select the super―heavy oil oil reservoir containing bottom aquifer (1)；
Step 2, deployment well pattern；
Two mouthfuls of water horizontal wells of deployment, the horizontal segment of two mouthfuls of water horizontal wells is respectively positioned in the oil reservoir of the super―heavy oil oil reservoir (2)；Or,
Two row's straight wells are disposed, the two rows straight well is located in the oil reservoir (2) of the super―heavy oil oil reservoir；
Step 3, steam soak；
Step 4, fireflood crude oil；
Step 5, extraction crude oil.
2. the fire flood method of water super―heavy oil oil reservoir in exploitation bottom according to claim 1, it is characterised in that in step
In 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 10m, the spy
The permeability of the oil reservoir (2) of super-heavy oil deposit is more than 200 × 10-3μm2。
3. the fire flood method of water super―heavy oil oil reservoir in exploitation bottom according to claim 2, it is characterised in that when 50 DEG C
The viscosity of oil reservoir (2) Crude Oil of the super―heavy oil oil reservoir is more than 10000mPa.s, oil reservoir (2) Central Plains of the super―heavy oil oil reservoir
The density of oil is more than 0.90g/cm3, the oil saturation of the oil reservoir (2) of the super―heavy oil oil reservoir is more than 50%.
4. the fire flood method of water super―heavy oil oil reservoir in exploitation bottom according to claim 1, it is characterised in that in step
In 2, when two mouthfuls of water horizontal wells are disposed, two mouthfuls of water horizontal wells are respectively first horizontal well (11) and second mouthful of water horizontal well (12),
First horizontal well (11) is steam injection well, and second mouthful of water horizontal well (12) is producing well, the horizontal section of first horizontal well (11)
In the top of second mouthful of water horizontal well (12) horizontal segment, the middle part of the horizontal segment of first horizontal well (11) in oil reservoir (2), second
The horizontal segment of saliva horizontal well (12) is located at the bottom of oil reservoir (2), and the horizontal segment of second mouthful of water horizontal well (12) is from bottom aquifer (1) 0.5m
～1.0m.
5. the fire flood method of water super―heavy oil oil reservoir in exploitation bottom according to claim 4, it is characterised in that first
The horizontal segment of horizontal well (11) is located at the oblique upper of second mouthful of water horizontal well (12) horizontal segment, the horizontal segment of first horizontal well (11)
Length be 200m～1000m, the length of the horizontal segment of second mouthful of water horizontal well (12) and the horizontal segment of first horizontal well (11)
Length it is identical, the distance between the horizontal segment of first horizontal well (11) and second mouthful of water horizontal well (12) horizontal segment for 80m～
200m。
6. the fire flood method of water super―heavy oil oil reservoir in exploitation bottom according to claim 4, it is characterised in that second mouthful
Body of the volume on the top of the horizontal segment of horizontal well (12) more than the bottom of the horizontal segment of second mouthful of water horizontal well (12)
Product.
7. the fire flood method of water super―heavy oil oil reservoir in exploitation bottom according to claim 1, it is characterised in that in step
In 2, when two row's straight wells is disposed, the two rows straight well is respectively first row straight well (21) and second row straight well (22), and first row is straight
Well (21) is parallel with second row straight well (22), and the straight well in first row straight well (21) is steam injection well, in second row straight well (22)
Straight well be producing well, the lower end of second row straight well (22) is respectively positioned in bottom aquifer (1).
8. the fire flood method of water super―heavy oil oil reservoir in exploitation bottom according to claim 7, it is characterised in that first row
The top perforation of straight well (21), the middle part perforation of second row straight well (22), the minimum perforating site of second row straight well (22) from
Bottom aquifer (1) 0.5m～1.0m.
9. the fire flood method of water super―heavy oil oil reservoir in exploitation bottom according to claim 1, it is characterised in that in step
In 3, the quantity of the steam soak is 2 round～3 rounds, after the steam soak between oil reservoir (2) and bottom aquifer (1)
Realize thermal communication.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611087124.3A CN106640012A (en) | 2016-12-01 | 2016-12-01 | Fireflooding oil-extracting method for exploiting super heavy oil reservoir with bottom water |
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| CN201611087124.3A CN106640012A (en) | 2016-12-01 | 2016-12-01 | Fireflooding oil-extracting method for exploiting super heavy oil reservoir with bottom water |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107882531A (en) * | 2017-12-01 | 2018-04-06 | 中国石油天然气股份有限公司 | Method is altered in the selectively control water seal of watered out reservoirs fireflood producing well |
| CN108442906A (en) * | 2018-04-26 | 2018-08-24 | 中国石油天然气股份有限公司 | Steam soak Heavy Oil Reservoir perforating methods and perforation structure |
| CN110284862A (en) * | 2019-03-19 | 2019-09-27 | 西南石油大学 | The method for infusing remaining oil in non-condensing gas or combustion (of oil) insitu exploitation oriented perforating |
| CN110905470A (en) * | 2019-12-17 | 2020-03-24 | 于文英 | Method for exploiting oil and gas by utilizing bottom water resources of oil and gas reservoir |
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