CN205532556U - Can improve thick -layer sandstone oil reservoir water drive swept volume's well pattern structure - Google Patents
Can improve thick -layer sandstone oil reservoir water drive swept volume's well pattern structure Download PDFInfo
- Publication number
- CN205532556U CN205532556U CN201620249171.2U CN201620249171U CN205532556U CN 205532556 U CN205532556 U CN 205532556U CN 201620249171 U CN201620249171 U CN 201620249171U CN 205532556 U CN205532556 U CN 205532556U
- Authority
- CN
- China
- Prior art keywords
- well
- oil reservoir
- straight well
- pattern structure
- swept volume
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The utility model provides a can improve thick -layer sandstone oil reservoir water drive swept volume's well pattern structure, including water injection straight well (1) and production straight well (2), water injection straight well (1) and production straight well (2) all contain perforation section (3), and perforation section (3) of water injection straight well (1) are located whole oil reservoir, and perforation section (3) of production straight well (2) are located the top of this oil reservoir, and the length of perforation section (3) of production straight well (2) is 10%~20% of this oil reservoir thickness. This can improve thick -layer sandstone oil reservoir water drive swept volume's well pattern structure passes through the oil reservoir combination and has adopted the notes of " adopt on the full top of annotating " to adopt the structure, is not changing under the injection medium prerequisite, and the injected water is the surplus oil at displacement oil reservoir top effectively, improves oil reservoir water drive swept volume coefficient, finally improves the water drive recovery ratio.
Description
Technical field
This utility model relates to oil reservoir development field, and particularly one can improve thick-layer sandstone oil reservoir water drive swept volume
Well pattern structure.
Background technology
Artificial recharge refers to water to inject oil reservoir, and water can enter the microscopic void of rock, both can be by oil displacement to recovering the oil
Shaft bottom, again can retentively stressor layer, extend the oilfield stable production phase, improve recovery ratio.
The waterflood recovery efficiency factor in one oil field is the product of floood conformance volume factor and oil-water displacement efficiency.A certain reservoir water
After volume reaches certain multiple, oil-water displacement efficiency ascensional range space is more and more less, finally tends to limit oil-water displacement efficiency.
The size of floood conformance volume is then limited by technical measures, and the floood conformance volume of different technologies measure is different, reasonably
Technical measures can be effectively improved waterflood sweep efficiency.Water flooding to be taked rational technical measures, as far as possible
Expand floood conformance volume, thus obtain higher waterflood recovery efficiency factor.
Note the adopt pattern traditional for sandstone oil reservoir is " full note is adopted entirely ", especially positive rhythm reservoir, injects water at weight
Mainly involving oil reservoir middle and lower part under power differentiation, when middle and lower part, remaining oil gradually decreases, and oil displacement efficiency progressivelyes reach pole
Limit, the aqueous meeting of producing well gradually rises to ultimate water content and is on the verge of to discard, but under " full note is adopted entirely " pattern, top
Portion's reservoir remaining oil is enriched with the most relatively, and top reservoir is the most effectively involved and displacement.
Utility model content
In order to solve the exploitation difficult problem that thick-layer top remaining oil can not effectively be involved, this utility model provides one
Can improve the well pattern structure of thick-layer sandstone oil reservoir water drive swept volume, this can improve thick-layer sandstone oil reservoir water drive and involve
The well pattern structure of volume have employed the pour and pluck structure of " full note top is adopted " by oil reservoir combination, before not changing injected media
Put, inject water can the remaining oil at effective displacement oil reservoir top, improve reservoir water drive swept volume coefficient, finally carry
High waterflood recovery efficiency factor.
This utility model solves the technical scheme is that one of its technical problem can improve thick-layer sandstone oil reservoir water
Drive the well pattern structure of swept volume, all contain perforation including water filling straight well and production straight well, water filling straight well and production straight well
Section, the perforated interval of water filling straight well is positioned at whole oil reservoir, and the perforated interval producing straight well is positioned at the top of this oil reservoir, produces straight
The 10%～20% of this core intersection a length of of the perforated interval of well.
The 12%～18% of this core intersection a length of of the perforated interval of production straight well.
The 13%～17% of this core intersection a length of of the perforated interval of production straight well.
The 16%～17% of this core intersection a length of of the perforated interval of production straight well.
The described well pattern structure that can improve thick-layer sandstone oil reservoir water drive swept volume is inverted five spot well pattern structure, and water filling is straight
Well is the water filling straight well being positioned at this inverted five spot well pattern structure center, produces straight well for being positioned at this inverted five spot well pattern structure edge
Production straight well.
The described well pattern structure that can improve thick-layer sandstone oil reservoir water drive swept volume is anti-seven spot pattern structure, and water filling is straight
Well is the water filling straight well being positioned at this anti-seven spot pattern structure centre, produces straight well for being positioned at this anti-seven spot pattern structural edge
Production straight well.
The described well pattern structure that can improve thick-layer sandstone oil reservoir water drive swept volume is inverted nine-spot pattern structure, and water filling is straight
Well is the water filling straight well being positioned at this inverted nine-spot pattern structure centre, produces straight well for being positioned at this inverted nine-spot pattern structural edge
Production straight well.
Water filling straight well and the distance produced between straight well are 80m～100m.
Water filling straight well and the distance produced between straight well are 80m.
Produce under the interior perforated interval possibly together with cement mortar block section, the upper end of cement mortar block section and water filling straight well of straight well
End connects, and the lower end of cement mortar block section is concordant with the end circle of this oil reservoir.
The beneficial effects of the utility model are: this can improve the well pattern structure profit of thick-layer sandstone oil reservoir water drive swept volume
With chemical flooding numerical simulation software to tradition " full note is adopted entirely " and " full note top is adopted " two ways, join at identical oil reservoir
Said conditions Imitating calculates, and result of calculation shows, after utility model technical scheme is implemented, oil reservoir top remaining oil obtains
Effective displacement, water drive swept volume coefficient is brought up to 61.2% by original 56.1%, improves about 5 percentage points,
Waterflood recovery efficiency factor is made to be improved.
Accompanying drawing explanation
The Figure of description of the part constituting the application is used for providing being further appreciated by of the present utility model, this practicality
Novel schematic description and description is used for explaining this utility model, is not intended that improper limit of the present utility model
Fixed.
Fig. 1 is the floor map of single inverted five spot well pattern structure.
Fig. 2 is the floor map of multiple inverted five spot well pattern structure.
Fig. 3 is the sectional view along A-A direction in Fig. 1 when " full note is adopted entirely " pattern.
Fig. 4 is the sectional view along A-A direction in Fig. 1 when " full note top adopt " pattern.
Fig. 5 is that this can improve swept volume coefficient pair before and after the well pattern structure of thick-layer sandstone oil reservoir water drive swept volume
Than figure.
Fig. 6 is the floor map of single anti-seven spot pattern structure.
Fig. 7 is the floor map of multiple anti-seven spot pattern structure.
Fig. 8 is the floor map of single inverted nine-spot pattern structure.
Fig. 9 is the floor map of multiple inverted nine-spot pattern structure.
Reference in figure:
1, water filling straight well；2, straight well is produced；3, perforated interval；4, cement mortar block section；5, oil reservoir.
Detailed description of the invention
It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can phases
Combination mutually.Describe this utility model below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
Old filed is developed through for many years, and Produced Liquid comprehensive water cut is high, but also not all reservoir is the most effectively involved and drives
Replacing, especially thick-layer sandstone top remaining oil is enriched with the most relatively.According to the technical solution of the utility model, one is proposed
Improving the pour and pluck structure of thick-layer sandstone oil reservoir water drive swept volume, as shown in Figures 1 to 4, cardinal principle is by reality
Execute water injection well (water filling straight well 1) full section injection, producing well (producing straight well 2) merely turns on the " complete of reservoir top
Note top is adopted " pattern, by the effect of liquid stream gravitational differentiation Yu the pressure release of oil reservoir top, force liquid stream to change direction, expand
Water drive swept volume, remaining oil enrichment layer position, displacement top, improve waterflood recovery efficiency factor.
The specific design content implementing " full note top is adopted " after thick-layer sandstone oil reservoir High water cut is as follows.
First, the full depth section (length of perforated interval 3 in this utility model of compo closure Production Wells is utilized
Degree is in Fig. 3 and Fig. 4 size vertically with oil reservoir 5 thickness).
Secondly, this thick-layer water logging parameter is monitored, it is judged that relatively high oil-containing thickness in layer.Water flooded grade is reaction remaining oil
How many important parameters, water flooded grade is the highest, and remaining oil is the lowest.Site test results is thought, in strong water flooded grade
The aqueous height of interval Produced Liquid, and low water flooded interval remaining oil is enriched with the most relatively, Produced Liquid is aqueous low.Such as Fig. 3,
In the pour and pluck structure adopt the thick oil pay system note system that thickness is H rice, the top of reservoir is weak water logging in being often in, the most just
It it is that reservoir top Produced Liquid is general aqueous relatively low, according to production test, it is judged that the concrete thickness h of the weak water logging in top
Rice.
Finally penetrate out high oil-containing interval.Utilize gun perforation process, then water out thickness h rice section again eyelet weak to top, only
This section is allowed to put into production.Such as Fig. 4, inject water and be affected by gravity to oil reservoir flows, but producing well oil reservoir top
Perforation is pressure release point, injects water and flows to the low direction of pressure, and the pour and pluck structure of " full note top is adopted " had both fed through in reservoir
Bottom, feeds through to again the top of reservoir, effectively expands floood conformance volume, reaches to drive top remaining oil enrichment
Oil reservoir, improves waterflood recovery efficiency factor purpose.
The thick-layer sandstone oil reservoir water drive that can improve of " full note top is adopted " described in the utility model pour and pluck structure involves body
Long-pending well pattern structure includes water filling straight well 1 and produces straight well 2, and water filling straight well 1 and production straight well 2 all contain perforated interval
3, the perforated interval 3 of water filling straight well 1 is positioned at whole oil reservoir, and the perforated interval 3 producing straight well 2 is positioned at the top of this oil reservoir,
The 10%～20% of this oil reservoir 5 thickness a length of of the perforated interval 3 of production straight well 2.Preferably produce the perforation of straight well 2
The 12%～18% of this oil reservoir 5 thickness a length of of section 3.Preferably produce this oil a length of of the perforated interval 3 of straight well 2
The 13%～17% of layer 5 thickness.Preferably the 16%～17% of this core intersection a length of of the perforated interval 3 of production straight well 2.
Perforated interval 3 size vertically in a length of Fig. 3 of perforated interval 3 in the application.
In the present embodiment, the described well pattern structure that can improve thick-layer sandstone oil reservoir water drive swept volume can be anti-five
Point well pattern structure, now water filling straight well 1 is the water filling straight well 1 being positioned at this inverted five spot well pattern structure center, produces straight well
2 is the production straight well 2 being positioned at this inverted five spot well pattern structure edge.Or, described can improve thick-layer sandstone oil reservoir water
The well pattern structure driving swept volume can also be for anti-seven spot pattern structure, and now water filling straight well 1 is for being positioned at this anti-7 wells
The water filling straight well 1 at web frame center, producing straight well 2 is the production straight well 2 being positioned at this anti-seven spot pattern structural edge.
Or, the described well pattern structure that can improve thick-layer sandstone oil reservoir water drive swept volume can also be tied for inverted nine-spot pattern
Structure, now water filling straight well 1 is the water filling straight well 1 being positioned at this inverted nine-spot pattern structure centre, produces straight well 2 for being positioned at
The production straight well 2 of this inverted nine-spot pattern structural edge, as shown in Figures 6 to 9.
In the present embodiment, water filling straight well 1 and the distance produced between straight well 2 are 80m～100m.Preferably water filling is straight
Well 1 and the distance produced between straight well 2 are 80m.Produce straight well 2 interior possibly together with cement mortar block section 4, cement mortar
The upper end of block section 4 is connected with the lower end of the perforated interval 3 of water filling straight well 1, the lower end of cement mortar block section 4 and this oil
The end circle of layer is concordant.
The thickness of herein described thick-layer sandstone oil reservoir is about 10m, describes this practicality below in conjunction with the accompanying drawings in detail new
Concrete application in the type thick-layer water drive pour and pluck structure configuration in certain oil field.
HWH oil field belongs to thick-layer sandstone oil reservoir, and monolayer effective thickness H averagely reaches 15.7m, " entirely notes through for many years
Entirely adopt " pattern waterflooding extraction, such as Fig. 3, current Produced Liquid comprehensive water cut is up to 95.7%, already close to economic pole
Limit aqueous level, is on the verge of to discard.From the point of view of production test data, the water logging by force of oil reservoir major part thickness, but thick-layer
Top still there is certain remaining oil.According to utility model design, raw first with compo closure producing well
Full depth section 15.7m produced.
Secondly, monitoring means is utilized, it is judged that relatively high oil-containing thickness in layer, fieldtesting results shows, top 2.5
M thickness section is weak water logging, and remaining oil enrichment has extraction value.
Then, gun perforation process water out thickness weak to top 2.5 meters eyelet again is utilized (i.e. to produce the perforated interval of straight well 2
A length of 2.5 meters of 3), only allow this section put into production.By the program, inject water and be affected by gravity at the bottom of oil reservoir
Flow in portion, but producing well oil reservoir top perforations is pressure release point, injects water and flows to the low direction of pressure, reaches to drive top
Portion's remaining oil enrichment oil reservoir, expands the purpose of water drive swept volume, and well water is dropped to less than 90% by 95.7%,
The oil reservoir being on the verge of to discard has recovered vigor again, as shown in Figure 5.
The above, only specific embodiment of the utility model, it is impossible to limit the scope that utility model is implemented with it,
So the displacement of its equivalent assemblies, or the equivalent variations made according to this utility model scope of patent protection and modification, all answer
Still fall within the category that this patent is contained.It addition, between technical characteristic and technical characteristic in this utility model, technology special
Levy between technical scheme, all can use with independent assortment between technical scheme and technical scheme.
Claims (10)
1. the well pattern structure that can improve thick-layer sandstone oil reservoir water drive swept volume, it is characterised in that described energy
The well pattern structure enough improving thick-layer sandstone oil reservoir water drive swept volume includes water filling straight well (1) and produces straight well (2),
Water filling straight well (1) and production straight well (2) all contain perforated interval (3), perforated interval (3) position of water filling straight well (1)
In whole oil reservoir, the perforated interval (3) producing straight well (2) is positioned at the top of this oil reservoir, produces penetrating of straight well (2)
The 10%～20% of this core intersection a length of of hole section (3).
The well pattern structure that can improve thick-layer sandstone oil reservoir water drive swept volume the most according to claim 1, its
It is characterised by, the 12%～18% of this core intersection a length of of the perforated interval (3) of production straight well (2).
The well pattern structure that can improve thick-layer sandstone oil reservoir water drive swept volume the most according to claim 2, its
It is characterised by, the 13%～17% of this core intersection a length of of the perforated interval (3) of production straight well (2).
The well pattern structure that can improve thick-layer sandstone oil reservoir water drive swept volume the most according to claim 3, its
It is characterised by, the 16%～17% of this core intersection a length of of the perforated interval (3) of production straight well (2).
The well pattern structure that can improve thick-layer sandstone oil reservoir water drive swept volume the most according to claim 1, its
Being characterised by, the described well pattern structure that can improve thick-layer sandstone oil reservoir water drive swept volume is inverted five spot well pattern structure,
Water filling straight well (1) is the water filling straight well (1) being positioned at this inverted five spot well pattern structure center, produces straight well (2) for being positioned at
The production straight well (2) at this inverted five spot well pattern structure edge.
The well pattern structure that can improve thick-layer sandstone oil reservoir water drive swept volume the most according to claim 1, its
Being characterised by, the described well pattern structure that can improve thick-layer sandstone oil reservoir water drive swept volume is anti-seven spot pattern structure,
Water filling straight well (1) is the water filling straight well (1) being positioned at this anti-seven spot pattern structure centre, produces straight well (2) for being positioned at
The production straight well (2) of this anti-seven spot pattern structural edge.
The well pattern structure that can improve thick-layer sandstone oil reservoir water drive swept volume the most according to claim 1, its
Being characterised by, the described well pattern structure that can improve thick-layer sandstone oil reservoir water drive swept volume is inverted nine-spot pattern structure,
Water filling straight well (1) is the water filling straight well (1) being positioned at this inverted nine-spot pattern structure centre, produces straight well (2) for being positioned at
The production straight well (2) of this inverted nine-spot pattern structural edge.
The well pattern structure that can improve thick-layer sandstone oil reservoir water drive swept volume the most according to claim 1, its
Being characterised by, water filling straight well (1) and the distance produced between straight well (2) are 80m～100m.
The well pattern structure that can improve thick-layer sandstone oil reservoir water drive swept volume the most according to claim 8, its
Being characterised by, water filling straight well (1) and the distance produced between straight well (2) are 80m.
The well pattern structure that can improve thick-layer sandstone oil reservoir water drive swept volume the most according to claim 1, its
Be characterised by, produce in straight well (2) possibly together with cement mortar block section (4), the upper end of cement mortar block section (4) with
The lower end of the perforated interval (3) of water filling straight well (1) connects, the lower end of cement mortar block section (4) and the end of this oil reservoir
Boundary is concordant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620249171.2U CN205532556U (en) | 2016-03-29 | 2016-03-29 | Can improve thick -layer sandstone oil reservoir water drive swept volume's well pattern structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620249171.2U CN205532556U (en) | 2016-03-29 | 2016-03-29 | Can improve thick -layer sandstone oil reservoir water drive swept volume's well pattern structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205532556U true CN205532556U (en) | 2016-08-31 |
Family
ID=56785514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620249171.2U Active CN205532556U (en) | 2016-03-29 | 2016-03-29 | Can improve thick -layer sandstone oil reservoir water drive swept volume's well pattern structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205532556U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218024A (en) * | 2017-05-02 | 2017-09-29 | 中国石油天然气股份有限公司 | The method of adjustment of multilayer low permeability sandstone reservoir high water-cut stage rhombic inverted nini-spot well pattern |
| CN110318719A (en) * | 2018-03-28 | 2019-10-11 | 中国石油化工股份有限公司 | A kind of two-way displacement method of positive rhythm thick formation |
| CN111997575A (en) * | 2020-08-21 | 2020-11-27 | 中国海洋石油集团有限公司 | Irregular well pattern optimization water injection method based on planar displacement component |
-
2016
- 2016-03-29 CN CN201620249171.2U patent/CN205532556U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218024A (en) * | 2017-05-02 | 2017-09-29 | 中国石油天然气股份有限公司 | The method of adjustment of multilayer low permeability sandstone reservoir high water-cut stage rhombic inverted nini-spot well pattern |
| CN107218024B (en) * | 2017-05-02 | 2019-06-11 | 中国石油天然气股份有限公司 | The method of adjustment of multilayer low permeability sandstone reservoir high water-cut stage rhombic inverted nini-spot well pattern |
| CN110318719A (en) * | 2018-03-28 | 2019-10-11 | 中国石油化工股份有限公司 | A kind of two-way displacement method of positive rhythm thick formation |
| CN111997575A (en) * | 2020-08-21 | 2020-11-27 | 中国海洋石油集团有限公司 | Irregular well pattern optimization water injection method based on planar displacement component |
| CN111997575B (en) * | 2020-08-21 | 2022-07-29 | 中国海洋石油集团有限公司 | Irregular well pattern optimization water injection method based on planar displacement component |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Zheng et al. | Controlling factors of remaining oil distribution after water flooding and enhanced oil recovery methods for fracture-cavity carbonate reservoirs in Tahe Oilfield | |
| Zhongxing et al. | Development modes of Triassic Yanchang formation Chang 7 member tight oil in Ordos Basin, NW China | |
| CN105888630B (en) | A kind of method that densification oil pressure splits horizontal well huff and puff oil recovery raising recovery ratio | |
| Jing et al. | Mechanism simulation of oil displacement by imbibition in fractured reservoirs | |
| CN104234677B (en) | A kind of vertical displacement of gas injection improves gas condensate reservoir condensate recovery ratio method | |
| CN110318721B (en) | Method for improving recovery ratio by foam flooding auxiliary nitrogen huff and puff of fault block oil reservoir | |
| CN104895537B (en) | Oily recovery method is replaced in water filling suitable for fracture-cavity type carbonate gas condensate reservoir | |
| CN107435535B (en) | A method of exploitation high dip angle heavy crude reservoir is driven using plane gravity | |
| CN107975357B (en) | The well pattern structure and oil production method of super-heavy oil deposit | |
| CN102606129B (en) | Method and system for thin interbed oilfield development | |
| CN102071922B (en) | Low permeable oil deposit virtual horizontal well development method | |
| CN110130859A (en) | A kind of heavy crude reservoir mixing nano-fluid alternating CO2Microbubble drives experimental provision and experimental method | |
| CN102061906B (en) | Air foam slug flow driving process for oil recovery of oil field | |
| CN105239990A (en) | Placing method of self-simulating lateral-displacement horizontal well of super-low permeability tight reservoir | |
| CN105952432A (en) | A staggered well arranging method for ultra-low permeability tight oil reservoir volume fracturing horizontal well quasi-natural energy exploitation | |
| CN205532556U (en) | Can improve thick -layer sandstone oil reservoir water drive swept volume's well pattern structure | |
| CN104912537B (en) | A kind of well net deployment method of huge thick buried hill fracture reservoir | |
| CN106246150A (en) | A kind of oil field compression fracture remodeling method | |
| CN103643928B (en) | A kind of depth profile control method step by step based on pressure field and velocity field distribution | |
| CN106194105B (en) | Launch profile control method in blocking agent deep | |
| CN106437674A (en) | Imitation horizontal well waterflooding well pattern adapting method | |
| CN105822284B (en) | Triangle horizontal well patterns well-arranging procedure | |
| CN109209306A (en) | Oil in Super-low Permeability compact oil reservoir horizontal well infuses CO2The asynchronous method for supplementing energy of handling up | |
| CN109113700A (en) | A kind of method of heavy crude reservoir old area multimedium steam oil production | |
| RU2543009C1 (en) | Gas-oil deposit development method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |