CN205558884U - Improve well pattern structure of sandstone oil reservoir rate of oil production - Google Patents
Improve well pattern structure of sandstone oil reservoir rate of oil production Download PDFInfo
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- CN205558884U CN205558884U CN201620135579.7U CN201620135579U CN205558884U CN 205558884 U CN205558884 U CN 205558884U CN 201620135579 U CN201620135579 U CN 201620135579U CN 205558884 U CN205558884 U CN 205558884U
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Abstract
The utility model provides an improve well pattern structure of sandstone oil reservoir rate of oil production, including first well group (1) and second well group (2), first well group (1) contains a plurality of first straight well (11) that even neat ranks were arranged, and the lower extreme of every first straight well (11) all is located the bottom or the below of total oil reservoir (3), second well group (2) contain a plurality of second straight well (21) that even neat ranks were arranged, and the lower extreme of every second straight well (21) all is located the middle part of total oil reservoir (3), and second straight well (21) and first straight well (11) in first well group (1) in second well group (2) interlock and set up. This improve well pattern structure of sandstone oil reservoir rate of oil production is applicable to the widely different oil reservoir of reservoir rerum natura between oiliness well head, layer series. This well pattern structure has improved the degree of employing and the rate of oil production of this layer series reserves, and the comparable former scheme of rate of oil production of this well pattern structure improves 2.7 times.
Description
Technical field
This utility model relates to oil reservoir development field, a kind of improve the sandstone oil reservoir that the number of plies is many, thickness is big and adopts
The well pattern structure of speed oil.
Background technology
Continental sandstone oil reservoir depositional environment is complicated, the layer of sand number of plies that different times is formed does not waits, thickness not etc., physical property not
Deng.Oil reservoir many for the number of plies, that thickness is big, multilamellar is gone into operation simultaneously might not be higher than monolayer operation yield, and reason is
Interlayer heterogeneity power differs, and interferes with each other between layers, and yield is not the relation being directly proportional to thickness.?
During waterflooding extraction, high permeability zone and hyposmosis lamination are adopted, and the oil flow resistance of less permeable layer is big, and production capacity is limited,
And the too early water logging of high permeability zone or water breakthrough, it will form water-flushed zone, finally reduce affusion utilizing ratio and waterflooding development effect,
Rate of oil production reduces.
Rate of oil production is the percentage ratio of producing well gross annual output oil mass and the oil in place of this Region control in certain region, is state
Border petroleum industry evaluates one of common counter of oil reservoir development efficiency, if rate of oil production is low, illustrates that this oil reservoir development is imitated
Rate is low.Producing well gross annual output oil mass depends on brought in well number and every mouthful of well yearly rate-oil production, and drive a well the most, the well yield of number
The highest, the oil in place of this Region control is certain, year oil-producing total amount the biggest, rate of oil production is the highest.
Can also be prevented effectively from the effect of interlayer interference to reach high_speed development oil reservoir, on-the-spot common practice is well spacing density
It is designed into economic limit, the development scheme the most successively returned in section, it is simply that a set of interval is reduced to low yield from high yield, changes
Another set of interval is become to continue to produce.A set of interval is big from the time length difference of high rate of oil production to low rate of oil production, has
Unit may be chronically at relatively low yield, rate of oil production continues up two class levels.Though oil reservoir under this development scheme
Being controlled, but top oil reservoir has neither part nor lot in and employs, oil recovery efficiency is not fully exerted.How to improve rate of oil production, carry
High resource utilization and economic benefit, be oil field actual production urgent problem.
Utility model content
The problem low in order to solve the number of plies is many, thickness is big sandstone oil reservoir rate of oil production, this utility model provides one
Improving the well pattern structure of sandstone oil reservoir rate of oil production, the well pattern structure of this raising sandstone oil reservoir rate of oil production is applicable to oil-containing
The oil reservoir that between well segment length, series of strata, reservoir properties difference is big.This well pattern structure improve these series of strata reserves development degree and
Rate of oil production, the rate of oil production of this well pattern structure improves 2.7 times than former scheme.
This utility model solves its technical problem and be the technical scheme is that a kind of sandstone oil reservoir rate of oil production of improving
Well pattern structure, including the first well group and the second well group；First well group contains the multiple first straight of uniformly neat ranks arrangement
Well, the lower end of each first straight well is respectively positioned on bottom or the lower section of total oil reservoir；Second well group contains the most neat ranks row
Multiple second straight wells of cloth, the lower end of each second straight well is respectively positioned on the middle part of total oil reservoir, and second in the second well group is straight
The first straight well in well and the first well group is crisscross arranged.
Line number a line more than the line number of the first well group of second well group, the columns of the second well group is more than the columns of the first well group
String.
Each first straight well is respectively positioned on the diagonal point of intersection of four second straight wells adjacent with this first straight well.
First well group is made up of three row three row the first straight wells, and the second well group is made up of four row four row the second straight wells.
The distance between two the first straight wells adjacent in first well group is equal, between two adjacent the first straight wells away from
From for 150 meters to 200 meters, the distance between two the second straight wells adjacent in the second well group is equal, adjacent two
Distance between second straight well is 150 meters to 200 meters.
First straight well contains perforated interval, and the perforated interval of the first straight well is positioned at lower 1/2nd of total core intersection.
Second straight well contains perforated interval, and the perforated interval of the second straight well is positioned at upper 1/2nd of total core intersection.
The beneficial effects of the utility model are: the well pattern structure of this raising sandstone oil reservoir rate of oil production is applicable to containing well section
The oil reservoir that between length, series of strata, reservoir properties difference is big.This well pattern structure improves the development degree of these series of strata reserves and adopts
Speed oil, the rate of oil production of this well pattern structure improves 2.7 times than former scheme.
In plane projection, the position of each Grouping of Sand Members And Well be other Grouping of Sand Members And Well well between position, beneficially the later stage local
Adjustment and tap.This well pattern pattern, breaks the development mode of original a set of well pattern thickening, it is achieved containing the oil reservoir of oil well segment length
Efficient Development, significant to field practice.
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 schematic top plan view of the first well group in embodiment 1.
Fig. 2 is the sectional view in Fig. 1 along A-A direction.
Fig. 3 is the schematic top plan view of the well pattern structure improving sandstone oil reservoir rate of oil production in embodiment 1.
Fig. 4 is the sectional view in Fig. 3 along B-B direction.
Fig. 5 is the schematic top plan view of the first well group in embodiment 2.
Fig. 6 is the schematic top plan view of the well pattern structure improving sandstone oil reservoir rate of oil production in embodiment 2.
Reference in figure: 1, the first well group；2, the second well group；3, total oil reservoir；4, control area；5,
Layer；6, oil reservoir；7, perforation；
11, the first straight well；21, the second straight well.
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.
Embodiment 1
A kind of well pattern structure improving sandstone oil reservoir rate of oil production, including the first well group 1 and the second well group 2；First well
The group 1 multiple first straight wells 11 containing the most neat ranks arrangement, the lower end of each first straight well 11 is positioned at total oil reservoir
The bottom of 3 or lower section；Second well group 2 multiple second straight wells 21 containing the most neat ranks arrangement are each second straight
The lower end of well 21 is respectively positioned on the middle part of total oil reservoir 3, in the second straight well 21 in the second well group 2 and the first well group 1
First straight well 11 is crisscross arranged, as shown in Figures 1 to 4.
It is big and have the sandstone oil reservoir of certain interlayer that this well pattern structure is primarily directed to grow many layers of sand, general thickness,
Solving the low contradiction of rate of oil production, design a kind of producing well number that increases to improve the scheme of rate of oil production, the program is closed
Key point is that well number increases, and producing well section producing well is away from not increasing, and does not forms former scheme producing well in the plane
Interference.First, design the limit producing well of the first well group 1 away from.Total oil in oil reservoir a-quadrant (i.e. control area 4)
Effective gross thickness H rice of layer 3, hence it is evident that there is multi-section multi-layer, feature that thickness is big.I.e. as in figure 2 it is shown, total oil reservoir 3
Containing multiple stratum 5 and multiple oil reservoir 6.Porosity is k%, in a sq-km region, and petroleum-in-place
M ten thousand tons.Utilizing theoretical formula to combine corresponding geology economic parameters, can to calculate this economic well spacing of oil reservoir limit (right for S rice
In the first well group 1), to being only capable of in a-quadrant disposing 9 mouthfuls of wells, such as Fig. 1 in plane, by on-the-spot generally exploitation side
H/2 rice bottom total oil reservoir 3 is gone into operation by formula, such as Fig. 2 in longitudinal direction.Individual well year oil-producing Q ten thousand tons, in a-quadrant, year is total
Oil-producing 9Q ten thousand tons, rate of oil production is up to 9Q/M.
Then, the well pattern parameter utilizing the first well group 1 designs the second well group 2, i.e. such as Fig. 3 on its diagonal intersection point
Shown in, the line number of the second well group 2 is than many a line of line number of the first well group 1, and the columns of the second well group 2 is than the first well group
The many string of columns of 1.Each first straight well 11 is respectively positioned on four second straight wells 21 adjacent with this first straight well 11
Diagonal point of intersection.The bottom H/2 rice well section of total oil reservoir 3 is only controlled by the first well group 1, total oil reservoir 3
Though top H/2 rice well section controlled but employed the most in time, cause reserves idle and the most optimal rate of oil production.For
This, redesign a set of second well group 2 to control the top H/2 rice of total oil reservoir 3 on its diagonal intersection point, and plane is such as
Shown in Fig. 3 and Fig. 4.According to the design parameter of the first well group 1, the second well group 2 can dispose 16 mouthfuls of wells, with first
Well group 1 brought in well section staggers, and operation top H/2 rice, such as Fig. 4 in longitudinal direction.
In the present embodiment, four the first square distributions of straight well 11 adjacent in the first well group 1, four first
Straight well 11 is sequentially connected with and can form square, square point of four the second straight wells 21 adjacent in the second well group 2
Cloth.First well group 1 is made up of three row three row the first straight wells 11, and the second well group 2 is by four row four row the second straight wells 21
Composition, the well pattern structure of this raising sandstone oil reservoir rate of oil production has 25 mouthfuls of straight well compositions.In first well group 1 adjacent
Two the first straight wells 11 between distance equal, the adjacent distance between two the first straight wells 11 be 150 meters extremely
200 meters, the distance between two the second straight wells 21 adjacent in the second well group 2 is equal, adjacent two second straight
Distance between well 21 is 150 meters to 200 meters.
In the present embodiment, the well pattern of this raising sandstone oil reservoir rate of oil production of the first well group 1 and the second well group 2 composition
In structure, the first straight well 11 is containing perforated interval (perforation 7 as shown in Figure 2), the perforated interval of the first straight well 11
Being positioned at lower 1/2nd of total oil reservoir 3 thickness, the second straight well 21 is containing perforated interval (as shown in figs. 2 and 4
Perforation 7), the perforated interval of the second straight well 21 is positioned at upper 1/2nd of total oil reservoir 3 thickness.If i.e. total oil reservoir 3
1500 meters located underground of circle, top, 2500 meters located underground of the end circle of total oil reservoir 3, then the thickness of total oil reservoir 3 is 1000
Rice, the perforated interval of the first straight well 11 is positioned at 2000 meters to 2500 meters, and the perforated interval of the second straight well 21 is positioned at 1500
Rice is to 2000 meters.The well pattern structure of this raising sandstone oil reservoir rate of oil production in use, top oil reservoir and bottom oil layer
Can employ simultaneously, not increase the well spacing density of certain well pattern, but brought in well number increases, rate of oil production improves.
The well pattern structure of this raising sandstone oil reservoir rate of oil production is applicable to containing reservoir properties difference between oil well segment length, series of strata
Big oil reservoir.This well pattern structure improves development degree and the rate of oil production of these series of strata reserves, adopting of this well pattern structure
Speed oil improves 2.7 times than former scheme.
In plane projection, the position of each Grouping of Sand Members And Well be other Grouping of Sand Members And Well well between position, beneficially the later stage local
Adjustment and tap.This well pattern pattern, breaks the development mode of original a set of well pattern thickening, it is achieved containing the oil reservoir of oil well segment length
Efficient Development, significant to field practice.
Embodiment 2
NM oil field belongs to banded sandstone oil reservoir, and interval is many, thickness is big.Pilot test district, oil reservoir east contains well section 1600
-2200 meters of rice, porosity 22.3%, oil in place 6,600,000 tons.
Combine corresponding geology first with theoretical formula and economic parameters to calculate this economic well spacing of oil reservoir limit be 180
Rice.Disposing 20 mouthful of first straight well 11 altogether by this well spacing square first well group 1, pattern is as it is shown in figure 5, scene
Go into operation according to the thinking of " returning on successively ", take the lead in employing bottom interval.After operation, average individual well day oil-producing 5 tons, presses
Year well opening time is to calculate for 330 days, individual well year oil-producing 0.165 ten thousand tons, recover the oil in pilot test district year 3.3 ten thousand tons, adopt
Speed oil is 0.5%.
For improving rate of oil production, according to technical solutions of the utility model, utilize head set well pattern parameter, at the first straight well
The second well group 2, pattern such as Fig. 6 is designed on 11 diagonal intersection points.According to first Analysis of Nested Design parameter, in the middle part of the second well group 2
Affixing one's name to 36 mouthful of second straight well 21, operation interval and first set well pattern brought in well section stagger, for top interval oil reservoir, and upper and lower two
Section produces simultaneously, and producing well number can reach 50 mouthfuls, individual well day oil-producing 5 tons, individual well year well opening time be 330 days,
Always recovering the oil in region year 8.25 ten thousand tons, rate of oil production is 1.25%.
The well pattern structure of this raising sandstone oil reservoir rate of oil production can employ top oil reservoir and bottom oil layer simultaneously, production
The double growth of well number, rate of oil production improves 0.75%, does not the most increase the well spacing density of oil reservoir, does not has former well pattern
Interference.
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 (7)
1. the well pattern structure improving sandstone oil reservoir rate of oil production, it is characterised in that described raising sandstone oil reservoir is adopted
The well pattern structure of speed oil includes the first well group (1) and the second well group (2)；
First well group (1) multiple first straight wells (11) containing the most neat ranks arrangement, each first straight well (11)
Lower end be respectively positioned on bottom or the lower section of total oil reservoir (3)；
Second well group (2) multiple second straight wells (21) containing the most neat ranks arrangement, each second straight well (21)
Lower end be respectively positioned on the middle part of total oil reservoir (3), the second straight well (21) in the second well group (2) and the first well group (1)
In the first straight well (11) be crisscross arranged.
The well pattern structure of raising sandstone oil reservoir rate of oil production the most according to claim 1, it is characterised in that the
The line number of two well groups (2) is than many a line of line number of the first well group (1), and the columns of the second well group (2) is than the first well
The many string of columns of group (1).
The well pattern structure of raising sandstone oil reservoir rate of oil production the most according to claim 2, it is characterised in that every
Individual first straight well (11) is respectively positioned on the diagonal of four second straight wells (21) adjacent with this first straight well (11) and hands over
At Dian.
The well pattern structure of raising sandstone oil reservoir rate of oil production the most according to claim 2, it is characterised in that the
One well group (1) is made up of three row three row the first straight well (11), and the second well group (2) is by four row four row the second straight well (21)
Composition.
The well pattern structure of raising sandstone oil reservoir rate of oil production the most according to claim 2, it is characterised in that the
Two the first straight wells (11) that the distance between two the first straight wells (11) adjacent in one well group (1) is equal, adjacent
Between distance be 150 meters to 200 meters, between two the second straight wells (21) adjacent in the second well group (2)
Apart from equal, the adjacent distance between two the second straight wells (21) is 150 meters to 200 meters.
The well pattern structure of raising sandstone oil reservoir rate of oil production the most according to claim 1, it is characterised in that the
One straight well (11) contains perforated interval, and the perforated interval of the first straight well (11) is positioned at lower two points of total oil reservoir (3) thickness
One of.
The well pattern structure of raising sandstone oil reservoir rate of oil production the most according to claim 1, it is characterised in that the
Two straight wells (21) contain perforated interval, and the perforated interval of the second straight well (21) is positioned at upper two points of total oil reservoir (3) thickness
One of.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620135579.7U CN205558884U (en) | 2016-02-23 | 2016-02-23 | Improve well pattern structure of sandstone oil reservoir rate of oil production |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106585223A (en) * | 2016-12-19 | 2017-04-26 | 中国石油天然气股份有限公司 | Drawing board used for drawing pattern water flooding development well patterns |
| CN114755163A (en) * | 2022-05-05 | 2022-07-15 | 西南石油大学 | Experimental system for representing interlayer interference degree of reservoir |
-
2016
- 2016-02-23 CN CN201620135579.7U patent/CN205558884U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106585223A (en) * | 2016-12-19 | 2017-04-26 | 中国石油天然气股份有限公司 | Drawing board used for drawing pattern water flooding development well patterns |
| CN106585223B (en) * | 2016-12-19 | 2018-05-04 | 中国石油天然气股份有限公司 | For drawing the drawing board of pattern water flooding well pattern |
| CN114755163A (en) * | 2022-05-05 | 2022-07-15 | 西南石油大学 | Experimental system for representing interlayer interference degree of reservoir |
| CN114755163B (en) * | 2022-05-05 | 2024-05-31 | 西南石油大学 | Experimental system for representing interference degree of reservoir stratum |
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