CN206309375U - Improved Well Pattern Structure of Rhombus Inverse Nine-point Well Pattern - Google Patents
Improved Well Pattern Structure of Rhombus Inverse Nine-point Well Pattern Download PDFInfo
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- CN206309375U CN206309375U CN201621289154.8U CN201621289154U CN206309375U CN 206309375 U CN206309375 U CN 206309375U CN 201621289154 U CN201621289154 U CN 201621289154U CN 206309375 U CN206309375 U CN 206309375U
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Abstract
The utility model discloses an improvement well pattern structure of anti-nine points well pattern of rhombus, improve the well pattern structure and include: the second well rows are arranged between every two adjacent well rows at intervals and extend along the first direction, and a plurality of second wells are arranged on the sixth well row, the seventh well row, the eighth well row and the ninth well row at intervals along the first direction; artificial fractures extending along the first direction are arranged at the positions of the first well row, the second well row, the third well row, the fourth well row and the fifth well row; the first well is transferred for water injection and is a transfer well. The utility model provides an improvement well pattern structure of anti-nine points well pattern of rhombus can make the water injection receive the effect even, improves the reservoir and uses the degree to improve the development effect of hyposmosis oil reservoir, and then improve the economic benefits in oil field.
Description
Technical field
The utility model is related to the field of petroleum exploitation of water drive sandstone reservoirs, more particularly to a kind of rhombic inverted nini-spot well pattern
Improve well pattern structure.
Background technology
Low-permeability oil deposit refers to oil reservoir of the ground level air infiltration rate less than 50 millidarcies (mD).China has put into exploitation at present
Low permeability oil field, major part belongs to river-delta deposit type.The oil-containing number of plies is more in the vertical for above-mentioned low-permeability oil deposit,
Well section is more long, and interlayer heterogeneity is stronger；In the plane, general development has the Fracture System of certain orientation.The type oil reservoir is opened
Hair typically uses rhombic inverted nini-spot well pattern, as shown in figure 1, well row is oriented parallel to fractuer direction to be disposed.Specifically,
It is sequentially arranged at intervals with the first well and arranges the 1, second well the 2, the 3rd well of row the 3, the 4th well of row row 4 and the 5th well row 5, the first well row
1st, the second well to be arranged and be provided with oil well on the 2, the 3rd well the 3, the 4th well of row row 4 and the 5th well row 5.First well arranges the 1, second well row
2nd, the line that the 3rd well is arranged between the oil well on the 3, the 4th well row 4 and the 5th well row 5 can surround a rhombus.
With the carrying out that long-term injecting water is developed, low-permeability oil deposit comprehensive water cut is gradually increasing, parallel to crack and well row side
To permeability it is higher, as shown in figure 1, direction oil well, specifically includes：First well is arranged on the 1, the 3rd well row 3 and the 5th well row 5
Oil well, aqueous rising is fast, or even the problem of sudden water flooding occurs in the later stage, and invalid water circulation is serious, and water consumption is big, causes pole
The earth is wasted；And the permeability perpendicular to crack and well row direction is relatively low, direction oil well is specifically included：Second well row 2 and the
Oil well on four wells row 4, it is impossible to set up displacement in flooding relation, oil well is not imitated for a long time, and daily fluid production rate and daily oil production are low, develops
Effect is bad, deficiency in economic performance.As fully visible, the well pattern structure water filling of current low-permeability oil deposit is uneven by effect, causes hypotonic
Saturating effect of reservoir development is poor, and economic benefit is low.
Therefore, in order to solve the above problems, it is necessary to study a kind of anti-9 points of rhombus suitable for low-permeability fissured oil reservoir
The improvement well pattern structure of well pattern.
Utility model content
The purpose of this utility model is to provide a kind of improvement well pattern structure of rhombic inverted nini-spot well pattern, enables to water filling to receive
Effect is uniform, improves reservoir development degree, so as to improve the development effectiveness of low-permeability oil deposit, and then improves the economic benefit in oil field.
Above-mentioned purpose of the present utility model can be realized using following technical proposal：
The improvement well pattern structure of rhombic inverted nini-spot well pattern, the rhombic inverted nini-spot well pattern include successively interval setting and along
The first well row, the second well row, the 3rd well row, the 4th well row and the 5th well row extended parallel to the first direction in crack, each
At least one first oil wells are provided with the well row, the line between all first oil wells can surround rhombus, the water chestnut
The center of shape is provided with first water injection well, and the second water filling is respectively arranged with first well row and the 5th well row
Well, the improvement well pattern structure includes：Between two neighboring well row interval setting and extend along the first direction the
Six wells row, the 7th well row, the 8th well row and the 9th well row, on the 6th well row, the 7th well row, the 8th well row and the 9th well row
It is respectively arranged with along spaced apart multiple second oil wells of the first direction；
Install and be equipped with along described in first well row, the second well row, the 3rd well row, the 4th well row and the ranking of the 5th well
The artificial fracture that first direction extends；
First oil well switchs to for water filling, is converted production well.
In a preferred embodiment, on along the first direction, the distance of two neighboring first water injection well
It is 500 meters to 600 meters.
In a preferred embodiment, on along the first direction, the length of the artificial fracture for 500 meters extremely
600 meters.
In a preferred embodiment, the artificial fracture of two neighboring water injection well intersects.
In a preferred embodiment, the interval setting successively and extend along the first direction parallel to crack the
One well row, the second well row, the 3rd well row, the 4th well row and the 5th well row are row of water injector, two neighboring on the row of water injector
The distance between water injection well is H1；
Successively interval setting and along parallel to crack first direction extend the 6th well row, the 7th well row, the 8th well
Row, the 9th well row are producing well row, and the distance of the upper two neighboring oil well of producing well row is H2, wherein, H1 is the twice of H2.
In a preferred embodiment, on the row of water injector the distance between two neighboring water injection well H1 be 500 meters extremely
600 meters.
In a preferred embodiment, the distance between described upper two neighboring oil well of producing well row H2 is 250 meters to 300
Rice.
In a preferred embodiment, the distance between adjacent row of water injector and producing well row are 75 meters to 100 meters.
In a preferred embodiment, the number of second oil well is 16, the 6th well row, the 7th well row, the
4 are arranged at intervals with each well row during eight wells are arranged and the 9th well is arranged.
In a preferred embodiment, the permeability for improving oil reservoir where well pattern structure of the rhombic inverted nini-spot well pattern is low
In 50 millidarcies.
The characteristics of the utility model and advantage are：By on the basis of original rhombic inverted nini-spot well pattern, at original five
Four producing wells row is set up between well row, and the producing well that original well is arranged is changed to converted production well, while in the first well row, the
The water injection well position of two wells row, the 3rd well row, the 4th well row and the 5th well row sets artificial fracture, so as to obtain rhombus anti-nine
The improvement well pattern structure of point.In due to the structure, well pattern is targetedly encrypted, and people is additionally arranged in water injection well position
Work pressure-break, can substantially reduce parallel fracture and well arranges the invalid water circulation in direction；Water filling is set up on vertical fracture direction
Displacement relation between well and producing well, water filling is uniform by effect on the whole, improves oily well yield and rate of oil production, finally improves
The economic benefit of waterflood recovery efficiency factor and oil reservoir development.
Brief description of the drawings
Fig. 1 is a kind of structural representation of rhombic inverted nini-spot well pattern；
Fig. 2 is a kind of floor map of the improvement well pattern structure of rhombic inverted nini-spot well pattern in the application implementation method；
Fig. 3 is a kind of transformation process schematic diagram of the structure of rhombic inverted nini-spot well pattern in the application implementation method；
Fig. 4 is a kind of transformation process schematic diagram of the structure of rhombic inverted nini-spot well pattern in the application implementation method.
Description of reference numerals：
First well row -1；Second well row -2；3rd well row -3；4th well row -4；5th well row -5；Rhombus -6；6th well
Row -7；7th well row -8；8th well row -9；9th well row -10.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the technical solution of the utility model is elaborated, it should be understood that
These implementation methods are merely to illustrate the utility model rather than limit scope of the present utility model, new this practicality has been read
After type, modification of the those skilled in the art to the various equivalent form of values of the present utility model each falls within the application appended claims
In limited range.
It should be noted that when element is referred to as " being arranged at " another element, it can directly on another element
Or can also there is element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or may be simultaneously present centering elements.Term as used herein " vertical ", " level ", " on ",
For illustrative purposes only, it is unique implementation method to be not offered as D score, "left", "right" and similar statement.
Unless otherwise defined, all of technologies and scientific terms used here by the article and the technical field for belonging to the application
The implication that technical staff is generally understood that is identical.The term used in the description of the present application is intended merely to description tool herein
The purpose of the implementation method of body, it is not intended that in limitation the application.Term as used herein "and/or" includes one or more
The arbitrary and all of combination of related Listed Items.
The utility model provides a kind of improvement well pattern structure of rhombic inverted nini-spot well pattern, enables to water filling uniform by effect,
Reservoir development degree is improved, so as to improve the development effectiveness of low-permeability oil deposit, and then the economic benefit in oil field is improved.
Fig. 2 is referred to, a kind of improvement well pattern structure of rhombic inverted nini-spot well pattern, the water chestnut are provided in the application implementation method
Shape inverted nine-spot pattern includes interval setting successively and arranges the 1, second well along the first well that the first direction parallel to crack extends
The 2, the 3rd well of row arranges the 3, the 4th well row 4 and the 5th well row 5, and at least one first oil wells are provided with each described well row, owns
Line between first oil well can surround rhombus, and the center of the rhombus is provided with first water injection well, in institute
State and be respectively arranged with the second water injection well on the first well row 1 and the 5th well row 5, the improvement well pattern structure includes：Two neighboring
Interval setting and arrange the 7, the 7th well along the 6th well that the first direction extends and arrange the 8, the 8th well row 9 and the 9th well between well row
Row 10, the 6th well is arranged and is respectively arranged with along the first party on the 7, the 7th well the 8, the 8th well of row row 9 and the 9th well row 10
To spaced apart multiple second oil wells；The 1, second well is arranged in first well arrange the 2, the 3rd well the 3, the 4th well of row row 4 and the 5th
Well arranges 5 positions and is provided with the artificial fracture extended along the first direction；On first well row 1 and the 5th well row 5
The second water injection well is set up respectively, and first oil well switchs to for water filling, is converted production well.
In the present embodiment, by the basis of original rhombic inverted nini-spot well pattern, increasing between original five wells row
If four producing wells row, and the producing well that original well is arranged is changed to converted production well, at the same the first well arrange the 1, second well row 2,
3rd well arranges the 3, the 4th well row 4 and the water injection well position of the 5th well row 5 sets artificial fracture, so as to obtain anti-9 points of rhombus
Improve well pattern structure.In due to the structure, well pattern is targetedly encrypted, and artificial pressure is additionally arranged in water injection well position
Crack, can substantially reduce parallel fracture and well arranges the invalid water circulation in direction；Set up on vertical fracture direction water injection well and
Displacement relation between producing well, water filling is uniform by effect on the whole, improves oily well yield and rate of oil production, finally improves water drive
The economic benefit of recovery ratio and oil reservoir development.
In the present embodiment, the permeability for improving oil reservoir where well pattern structure of the rhombic inverted nini-spot well pattern is less than 50
Millidarcy.That is, the improvement well pattern structure of rhombic inverted nini-spot well pattern described herein is primarily directed to low-permeability oil deposit
On the improvement that carries out of well pattern structure.
Wherein, a kind of typical well pattern structure of exploitation low-permeability oil deposit is rhombic inverted nini-spot well pattern at present.The rhombus is anti-
Nine-spot pattern include successively interval setting and along parallel to crack first direction extend the first well arrange the 1, second well row 2,
3rd well arranges the 3, the 4th well row 4 and the 5th well row 5, and at least one first oil wells are provided with each well row, all described
Line between first oil well can surround rhombus 6.The center of the rhombus 6 is provided with first water injection well.Described
It is 8 that one well arranges the 1, second well and arranges the total number of the first oil well that the 2, the 3rd well arranged on the 3, the 4th well row 4 and the 5th well row 5, point
It is not arranged in the point of bisection on the summit of rhombus 6 and two neighboring summit.
Specifically, when the rhombic inverted nini-spot well pattern for low-permeability fissured oil reservoir is encrypted improvement, Ke Yiyi
Realized according to following steps.
Step one：Row encryption oil well is disposed between each well row of former rhombic inverted nini-spot well pattern (see Fig. 1), Fig. 3 institutes are formed
The well pattern structure figure for showing.
Step 2：Producing well and water injection well to former rhombic inverted nini-spot well pattern all implement artificial fracturing, form what Fig. 4 illustrated
Well pattern structure figure.
Step 3：Metaideophone is carried out to the producing well of former rhombic inverted nini-spot well pattern and is changed into water injection well, form the well pattern that Fig. 2 illustrates
Structure.
In the present embodiment, on along the first direction, the distance of the two neighboring water injection well is 500 meters
M (), to 600 meters, the length of the artificial fracture is 500 meters to 600 meters.
Wherein, the first direction is the fractuer direction parallel to low-permeability oil deposit.The distance of two neighboring water injection well can
Think 500 meters to 600 meters.
Specifically, the distance between two mouthfuls of adjacent water injection wells can by well spacing density optimize or well spacing optimization come
Or calculate.Set the distance between above-mentioned adjacent two mouthfuls of water injection wells for 500 meters to 600 meters when, both consider technology
On feasibility, it is contemplated that economic benefit.If well spacing is too small, then well spacing density is too big, cost of investment is high, exploitation oil
Field economic benefit is too poor；Opposite, if well spacing is too big, the sand body on stratum is lost control of, cause between water injection well and producing well
Do not connect, that is, inject water drive and replace motionless in-place oil.Generally, the well spacing of rhombic inverted nini-spot well pattern can be the 3 of array pitch
~4.5 times.
In the present embodiment, the length of the artificial fracture can be 500 meters to 600 meters.
Because the permeability of low-permeability oil deposit is relatively very low, and permeability is the parameter of oil field development most critical, infiltration
Rate oil well output high is just high, and the injection rate of water injection well is just high；Permeability is low, then oil well output is just low, and the injection rate of water injection well is just
It is low, or even stratum cannot be injected water into.Oil field must just implement artificial fracturing to obtain yield higher, will be more
In the injection stratum of water, to keep stratum energy higher, the filtrational resistance on stratum is overcome, drive stratum crude stream to enter oil
Well.
Specifically, the direction of artificial fracture is as shown in figure 4, parallel to the direction of well row.Because being implemented on well
Pressure break, so being all that, through oil well and water injection well, and fracture length is symmetrical on well point.
General pressure-break length only has 150~200m, and the artificial fracture in the application is that the purpose of 500~600m is
In order to allow oil-well drainage crack can insertion be connected, and row of water injector crack also can insertion couple together.
Further, the artificial fracture of two neighboring water injection well intersects.
Can realize that artificial fracture intersects by the optimization of artificial fracturing technological parameter, the well spacing for 500~600m,
The operational discharge capacity of the pressure break pump truck after optimization is generally 10-15 side/minute, the fracturing fluid consumption general 1000 of individual well individual reservoir section
It is more than side, general 50~100 side of sand feeding amount of individual well individual reservoir section.After good these parameters of optimization design, can be by calculating
The numerical simulation technology of machine predicts the length of pressure-break in future, height isotactic mould parameter.Can also lead in pressing crack construction process
Microseismic means are crossed, the data point information of the stratum vibrations that collection subsurface fracture is caused, after data inversion
The parameters such as actual fracture length, height can be explained.Intersect by by the artificial fracture of water injection well, can improve first
The water injection capacity of water injection well, such as in the case of not pressure break, daily water-injection rate only 10~20 sides, but after pressure break, daily water-injection rate can
To bring up to more than 50 sides；Secondly, pressure higher can be kept in the crack of water injection well, formed water injection well and producing well it
Between larger producing pressure differential so that ensureing to have enough injection water drives, alternately layer crude oil flow is plucked out of to producing well, improve
Oily well yield；Again, can improve injection water involves scope, can drive the underground crude oil swept in more large area, so that
The oil recovery factor of displacement in flooding can be improved.
In a specific embodiment, the interval setting successively and along parallel to crack first direction extend
The first well arrange the 1, second well arrange the 2, the 3rd well arrange the 3, the 4th well row 4 and the 5th well row 5 be row of water injector, on the row of water injector
The distance between two neighboring water injection well is H1；Successively interval setting and along parallel to crack first direction extend the 6th
It is producing well row that well arranges the 7, the 7th well and arrange the 8, the 8th well to arrange the 9, the 9th well row 10, the upper two neighboring oil well of producing well row away from
From being H2, wherein, H1 is the twice of H2.Specifically, on along the first direction, two neighboring note on the row of water injector
The distance between well H1 is 500 meters to 600 meters.The distance between the upper two neighboring oil well of producing well row H2 is 250 meters
To 300 meters.
That is, half of the distance between two oil wells equal to injection well spacing, oil well described herein is second
Oil well, that is, the oil well arranged positioned at the 6th well on the 7, the 7th well the 8, the 8th well of row row 9 and the 9th well row 10 after encrypting.It is described
Number of second oil well on each increased well row can be 4, along the first direction arranged for interval.Specifically, institute
The number of the second oil well is stated for 16, each in the 7, the 7th well of the 6th well row the 8, the 8th well of row row 9 and the 9th well row 10
4 are arranged at intervals with well row.In this way, can be more regular in order to encrypt the new well pattern structure that is formed afterwards.Encryption oil well
Position setting can be set on the basis of the position of schematic diagram.Under practical application scene, with reference to position stratum to be dug a well
Whether the situation of sand body development, the height of permeability, surface condition allows the factors such as well-digging, and second oil well newly established can
It is adjusted with the range of 20m.
In one embodiment, the distance between adjacent row of water injector and producing well row can be 75 meters to 100 meters.
General, the well spacing of rhombic inverted nini-spot well pattern is 500~600m, and array pitch is 150~200m.Wherein, array pitch refers to
It is distance that former diamond shaped pattern first is discharged to the 3rd row.The shape of such element pattern structure is exactly rhombus.In this implementation
In mode, after being encrypted to the rhombic inverted nini-spot well pattern, i.e., one is encrypted between the row of continuous two row original rhombic inverted nini-spot well pattern
After arranging equidistant grease hole, 1/2nd of former array pitch, as 75~100m are equal to equivalent to the array pitch after encryption.When
So, the array pitch after the well spacing and array pitch or encryption can adaptively be adjusted according to actual application environment, and the application exists
This is not limited utterly.
Under a specific application scenarios, such as a certain low-permeability oil deposit of Daqing oil field, reservoir permeability 2~
5mD.The oil reservoir is developed using rhombic inverted nini-spot well pattern, and well pattern structure is as shown in Figure 1.The well pattern has five row's wells, from top to bottom
It is followed successively by row number；Well row direction is parallel with fractuer direction.On each row, inter-well distance is 500m.Well arranges the distance and well row between
It is 150m.
Step one, disposes row encryption oil well between each well row of former rhombic inverted nini-spot well pattern.In anti-9 wells of former rhombus
First row encryption oil well is disposed between the row of net first and second, the inter-well distance of oil well is 250m, oil-well drainage and anti-9 wells of former rhombus
Array pitch between first and second row of net is 75m, and symmetrical.
In former rhombic inverted nini-spot well pattern, second and third disposes second row encryption oil well between arranging, and the inter-well distance of oil well is
Array pitch between second and third row of 250m, oil-well drainage and former rhombic inverted nini-spot well pattern is 75m, and symmetrical.
In former rhombic inverted nini-spot well pattern, third and fourth disposes the 3rd row encryption oil well between arranging, and the inter-well distance of oil well is
Array pitch between third and fourth row of 250m, oil-well drainage and former rhombic inverted nini-spot well pattern is 75m, and symmetrical.
The 4th row encryption oil well is disposed between the row of former rhombic inverted nini-spot well pattern fourth, fifth, the inter-well distance of oil well is
Array pitch between fourth, fifth row of 250m, oil-well drainage and former rhombic inverted nini-spot well pattern is 75m, and symmetrical.
Step 2,8 mouthfuls of producing wells and 5 mouthfuls of water injection wells to former rhombic inverted nini-spot well pattern all implement artificial fracturing, artificial pressure
Crack is long to be 500m.
Step 3,8 mouthfuls of producing wells to former rhombic inverted nini-spot well pattern carry out metaideophone, are changed into water injection well.So far, hyposmosis is split
The cryptographic structure of the rhombic inverted nini-spot well pattern of seam property oil reservoir has built up.
The improvement well pattern structure of rhombic inverted nini-spot well pattern described herein is that fracture development is considered from plane, with reference to people
The well pattern thickening structure of the rhombic inverted nini-spot well pattern of work fracturing technique.It can reduce parallel fracture and the oil well in well row direction contains
The problems such as water rises fast, sudden water flooding, invalid water circulation and big water consumption；On the direction arranged perpendicular to crack and well, it
Can set up the displacement relation between water injection well and producing well, improve direction oil well yield, and then improve rate of oil production, final
The economic benefit of waterflood recovery efficiency factor and oil reservoir development.
It is as shown in the table：Using the rhombic inverted nini-spot well pattern of prior art, highest rate of oil production only 0.8%, stage extraction
Degree 14.7%.Waterflooding development, highest rate of oil production are carried out using the cryptographic structure of rhombic inverted nini-spot well pattern of the present utility model
1.2%, improve 0.4 percentage point；Stage recovery percent of reserves reaches 19.4%, improves 4.7 percentage points.
Above-mentioned each implementation method in this specification is described by the way of progressive, identical between each implementation method
Similar portion is cross-referenced, and what each implementation method was stressed is and other embodiment difference.
The foregoing is only several implementation methods of the present utility model, although the implementation method disclosed by the utility model is such as
On, but the content is only to facilitate the implementation method for understanding the utility model and using, is not intended to limit this practicality new
Type.Any the utility model person of ordinary skill in the field, is not departing from the spirit and scope disclosed by the utility model
On the premise of, any modification can be made in the formal and details of implementation method with change, but patent of the present utility model
Protection domain, the scope that must be still defined by appended claims is defined.
Claims (10)
1. the improvement well pattern structure of rhombic inverted nini-spot well pattern, the rhombic inverted nini-spot well pattern includes interval setting successively and along flat
The first well row, the second well row, the 3rd well row, the 4th well row and the 5th well row that first direction of the row in crack extends, each institute
State and be provided with least one first oil wells on well row, the line between all first oil wells can surround rhombus, the rhombus
Center be provided with first water injection well, first well row and the 5th well row on be respectively arranged with the second water filling
Well, it is characterised in that：The improvement well pattern structure includes：The interval setting and along the first party between two neighboring well row
Arranged to the 6th well row, the 7th well row, the 8th well row and the 9th well that extend, the 6th well row, the 7th well row, the 8th well row and
It is respectively arranged with along spaced apart multiple second oil wells of the first direction on 9th well row；
Install and be equipped with along described first in first well row, the second well row, the 3rd well row, the 4th well row and the ranking of the 5th well
The artificial fracture that direction extends；
First oil well switchs to for water filling, is converted production well.
2. the improvement well pattern structure of rhombic inverted nini-spot well pattern as claimed in claim 1, it is characterised in that：Along described first
On direction, the distance of two neighboring first water injection well is 500 meters to 600 meters.
3. the improvement well pattern structure of rhombic inverted nini-spot well pattern as claimed in claim 1, it is characterised in that：Along described first
On direction, the length of the artificial fracture is 500 meters to 600 meters.
4. the improvement well pattern structure of rhombic inverted nini-spot well pattern as claimed in claim 1, it is characterised in that：Two neighboring water injection well
Artificial fracture intersect.
5. the improvement well pattern structure of rhombic inverted nini-spot well pattern as claimed in claim 1, it is characterised in that：The interval successively sets
The first well row, the second well row, the 3rd well row, the 4th well row and the 5th well put and extend along the first direction parallel to crack
It is row of water injector to arrange, and the distance between two neighboring water injection well is H1 on the row of water injector；
Interval setting and the 6th well row, the 7th well row, the 8th well row, that extend along the first direction parallel to crack successively
Nine wells row arranges for producing well, and the distance of the upper two neighboring oil well of producing well row is H2, wherein, H1 is the twice of H2.
6. the improvement well pattern structure of rhombic inverted nini-spot well pattern as claimed in claim 5, it is characterised in that：On the row of water injector
The distance between two neighboring water injection well H1 is 500 meters to 600 meters.
7. the improvement well pattern structure of rhombic inverted nini-spot well pattern as claimed in claim 5, it is characterised in that：On the producing well row
The distance between two neighboring oil well H2 is 250 meters to 300 meters.
8. the improvement well pattern structure of rhombic inverted nini-spot well pattern as claimed in claim 5, it is characterised in that：Adjacent row of water injector
With producing well row the distance between be 75 meters to 100 meters.
9. the improvement well pattern structure of rhombic inverted nini-spot well pattern as claimed in claim 1, it is characterised in that：Second oil well
Number is 16, and 4 are arranged at intervals with each well row in the 6th well row, the 7th well row, the 8th well row and the 9th well row
It is individual.
10. the improvement well pattern structure of rhombic inverted nini-spot well pattern as claimed in claim 1, it is characterised in that：The rhombus anti-nine
The permeability for improving oil reservoir where well pattern structure of point well pattern is less than 50 millidarcies.
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| CN110552673A (en) * | 2019-08-16 | 2019-12-10 | 中国石油天然气股份有限公司 | Method for improving extraction degree of low-pressure tight oil reservoir |
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| CN111173492B (en) * | 2020-01-03 | 2022-02-22 | 中国石油化工股份有限公司 | Differential well spacing adaptation method for double-control diamond well pattern |
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