CN206309377U - Improvement well pattern structure based on rhombic inverted nini-spot well pattern - Google Patents
Improvement well pattern structure based on rhombic inverted nini-spot well pattern Download PDFInfo
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- CN206309377U CN206309377U CN201621289164.1U CN201621289164U CN206309377U CN 206309377 U CN206309377 U CN 206309377U CN 201621289164 U CN201621289164 U CN 201621289164U CN 206309377 U CN206309377 U CN 206309377U
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Abstract
The utility model discloses a kind of improvement well pattern structure based on rhombic inverted nini-spot well pattern, it includes：Encryption producing well is provided with the first well row；Water injection well on well row is changed into turning extraction oil well；The first Encryption Well row is provided between first, second well row, well row is provided with encryption water injection well；Encryption producing well is provided with the second well row；The second Encryption Well row is provided between second, third well row, well row is provided with encryption producing well；Encryption water injection well is provided with the 3rd well row, the first oil well on well row is changed into metaideophone well；The 3rd Encryption Well row is provided between the three, the 4th wells row, Encryption Well row is provided with encryption producing well；Encryption producing well is provided with the 4th well row；The 4th Encryption Well row is provided between the four, the 5th wells row, Encryption Well row is provided with encryption water injection well；Encryption producing well is provided with the 5th well row, the water injection well on well row is changed into turning extraction oil well.The utility model improvement well pattern structure can be used to improve oil well output.
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 to be based on anti-9 wells of rhombus
The improvement well pattern structure of net.
Background technology
The Chinese oil field major part for having put into exploitation belongs to river-delta deposit type at present, and most is hypotonic
Saturating oil field.Low-permeability oil deposit refers to oil reservoir of the ground level air infiltration rate less than 50 millidarcies (mD).For relative homogeneous, crack
Direction substantially and the larger low permeability oil field of fault block area, does not generally carry out waterflooding extraction using rhombic inverted nini-spot well pattern, such as
Shown in Fig. 1.When arrangement rhombic inverted nini-spot well pattern is developed, well row direction 7 can be disposed along predetermined direction, example
Such as, the predetermined direction can be the east-west direction parallel to crack.Specifically, the first well row 1, the can be sequentially arranged at intervals with
Two wells arrange the 2, the 3rd well and arrange the 3, the 4th well row 4 and the 5th well row 5, and first well arranges the 1, second well and arranges the 2, the 3rd well row the 3, the 4th
Oil well is provided with well row 4 and the 5th well row 5.First well arranges the 1, second well and arranges the 2, the 3rd well and arranges the 3, the 4th well row 4 and the
The line between oil well on five wells row 5 can surround a rhombus 6.The corresponding oil-water well number ratio of above-mentioned rhombic inverted nini-spot well pattern is
3:1, comparatively, oil well number accounting is high, and the field output of initial stage of development is of a relatively high.
However, after oil field development for a period of time, when the comprehensive water cut in oil field reaches 40~50%, anti-9 wells of rhombus
Net exposes many problems, such as：Well spacing is bigger than normal, causes water drive control relatively low；The water filling of oil well, to few, is made by efficacious prescriptions
It is relatively low into water-flooding performance；On the whole with the rising of oil-field aqueous, the corresponding oil well output of rhombic inverted nini-spot well pattern can be big
Width reduction.
For the contradiction for solving to be exposed in oilfield development process, stabilization or improve oil field and oily well yield, it is necessary to
It is improved on the basis of rhombic inverted nini-spot well pattern structure, to overcome produced problem after oil field comprehensive water cut is raised.
Utility model content
The purpose of this utility model is to provide a kind of improvement well pattern structure based on rhombic inverted nini-spot well pattern, for improving water
Drive controlling extent, increase water filling by efficacious prescriptions to raising water-flooding performance, so as to improve oil well output.
Above-mentioned purpose of the present utility model can be realized using following technical proposal：
A kind of improvement well pattern structure based on rhombic inverted nini-spot well pattern, the rhombic inverted nini-spot well pattern includes that interval sets successively
Put and arranged along the first well row, the second well row, the 3rd well row, the 4th well row and the 5th well that predetermined direction extends, described in each
At least one first oil wells are provided with well row, the line between all first oil wells can surround rhombus, the rhombus
Center is provided with first water injection well, and the second water injection well is respectively arranged with first well row and the 5th well row,
The improvement well pattern structure includes：
Along the spaced encryption producing well of the predetermined direction on first well row；On the first well row
Water injection well is changed into turning extraction oil well for what is recovered the oil；
The the first Encryption Well row set between first well row and the second well row, on first Encryption Well row along
The predetermined direction is arranged at intervals with encryption water injection well；
Along the spaced encryption producing well of the predetermined direction on second well row；
The the second Encryption Well row set between second well row and the 3rd well row, on second Encryption Well row along
The predetermined direction is arranged at intervals with encryption producing well；
Along the spaced encryption water injection well of the predetermined direction on the 3rd well row, on the 3rd well row
First oil well is changed into the metaideophone well for water filling；
The 3rd Encryption Well row set between the 3rd well row and the 4th well row, on the 3rd Encryption Well row along
The predetermined direction is arranged at intervals with encryption producing well；
Along the spaced encryption producing well of the predetermined direction on the 4th well row；
The 4th Encryption Well row set between the 4th well row, the 5th well row, on the 4th Encryption Well row along
The predetermined direction is arranged at intervals with encryption water injection well；
Along the spaced encryption producing well of the predetermined direction on the 5th well row, on the 5th well row
Water injection well is changed into turning extraction oil well for what is recovered the oil.
In a preferred embodiment, on along the predetermined direction, the well spacing of the rhombic inverted nini-spot well pattern is L,
Array pitch is H, then well spacing L is 3 times to 4.5 times of array pitch H.
In a preferred embodiment, on along the predetermined direction, the well spacing of the rhombic inverted nini-spot well pattern is 500
Rice is to 600 meters.
In a preferred embodiment, the array pitch of the rhombic inverted nini-spot well pattern is 150 meters.
In a preferred embodiment, on along the predetermined direction, the well spacing for improving well pattern structure is 250 meters
To 300 meters.
In a preferred embodiment, the array pitch for improving well pattern structure is 75 meters.
In a preferred embodiment, the improvement well pattern structure is anti-seven spot pattern structure.
In a preferred embodiment, the well spacing of the anti-seven spot pattern structure is 146 meters to 168 meters.
In a preferred embodiment, the oil-water well number ratio of the anti-seven spot pattern structure is 2:1.
In a preferred embodiment, the permeability for improving oil reservoir where well pattern structure is less than 50 millidarcies.
The characteristics of the utility model and advantage are：Adjustment is encrypted by by rhombic inverted nini-spot well pattern, increases producing well
And water injection well, reduce oil-water well number ratio to 2:1, well space shortening, the water filling for increasing oil well receives efficacious prescriptions to rhombic inverted nini-spot well pattern
Structure is changed into the cryptographic structure of anti-seven spot pattern, realizes narrowing down to 291 meters to 335 meters of the injector producer distance of anti-9 points of former rhombus
146 meters to 168 meters of the injector producer distance of anti-seven spot pattern；Simultaneously by the water filling of producing well by efficacious prescriptions to bringing up to three sides from two
To；Involve plane more uniform, compared with the rhombic inverted nini-spot well pattern of prior art, using anti-7 wells of the present utility model
The cryptographic structure of net, can improve water drive control, improve water-flooding performance, improve rate of oil production, improve stage extraction
Degree, and then improve the economic benefit of the final waterflood recovery efficiency factor of oil reservoir 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 plane signal of the improvement well pattern structure based on rhombic inverted nini-spot well pattern in the application implementation method
Figure.
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；Well row side
To -7；First Encryption Well row -11；Second Encryption Well row -12；3rd Encryption Well row -13；4th Encryption Well row -14；Anti- 7 wells
Web frame -8.
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 purpose of this utility model is to provide a kind of improvement well pattern structure based on rhombic inverted nini-spot well pattern, specifically, being
A kind of rhombic inverted nini-spot well pattern is changed into the cryptographic structure of anti-seven spot pattern, after it is directed to oil field comprehensive water cut rising, for carrying
Water drive control high, increase water filling are by efficacious prescriptions to raising water-flooding performance, so as to improve oil well output.
Refer to Fig. 2, the application embodiments, provides a kind of improvement well pattern structure based on rhombic inverted nini-spot well pattern,
The rhombic inverted nini-spot well pattern include successively interval setting and along parallel to crack predetermined direction extend the first well row 1,
Second well arranges the 2, the 3rd well and arranges the 3, the 4th well row 4 and the 5th well row 5, and at least one first oil are provided with each described well row
Well, the line between all first oil wells can surround rhombus, and the center of the rhombus is provided with first water filling
Well, the second water injection well is respectively arranged with first well row 1 and the 5th well row 5, and the improvement well pattern structure includes：Institute
State on the first well row 1 along the spaced encryption producing well of the predetermined direction；Water injection well on the first well row 1 is changed into
Turn extraction oil well for what is recovered the oil；The the first Encryption Well row 11 set between first well row 1 and the second well row 2, it is described
On first Encryption Well row 11 encryption water injection well is arranged at intervals with along the predetermined direction；Along institute on second well row 2
State the spaced encryption producing well of predetermined direction；The second Encryption Well set between second well row 2 and the 3rd well row 3
Row 12, encryption producing well is arranged at intervals with the second Encryption Well row 12 along the predetermined direction；3 are arranged in the 3rd well
On along the spaced encryption water injection well of the predetermined direction, the first oil well on the 3rd well row 3 is changed into for water filling
Metaideophone well；The 3rd Encryption Well row 13 set between the 3rd well row 3 and the 4th well row 4, the 3rd Encryption Well
On row 13 encryption producing well is arranged at intervals with along the predetermined direction；Along the predetermined direction on the 4th well row 4
Spaced encryption producing well；The 4th Encryption Well row 14 set between the 4, the 5th well row 5, described the are arranged in the 4th well
On four Encryption Wells row 14 encryption water injection well is arranged at intervals with along the predetermined direction；Along described on the 5th well row 5
The spaced encryption producing well of predetermined direction, the water injection well on the 5th well row 5 is changed into turning extraction oil well for what is recovered the oil.
In the present embodiment, the permeability for improving oil reservoir where well pattern structure based on rhombic inverted nini-spot well pattern is low
In 50 millidarcies.That is, the improvement well pattern structure of rhombic inverted nini-spot well pattern described herein is primarily directed to hyposmosis
The improvement that well pattern structure on oil reservoir is carried out.
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 predetermined 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：Two mouthfuls of producing wells are equidistantly encrypted on the well of former rhombic inverted nini-spot well pattern first row, and former two mouthfuls are noted
Well is changed into turning extraction oil well, and this row's well spacing is reduced into 250~300m；
Step 2：Equidistant four mouthfuls of water injection wells of encryption between the first and second well row of former rhombic inverted nini-spot well pattern, form the
One Encryption Well is arranged, and first Encryption Well row is in staggered row with the first well row of former rhombic inverted nini-spot well pattern, the well location of the second well row
Row, array pitch is 75m, and row's water filling inter-well distance is 250~300m；
Step 3：Three mouthfuls of producing wells are equidistantly encrypted in the well of former rhombic inverted nini-spot well pattern second row, this row's well spacing reduces
It is 250~300m；
Step 4：Four mouthfuls of producing wells are equidistantly encrypted between the second well row, the 3rd well row in former rhombic inverted nini-spot well pattern,
Form the second Encryption Well row.Second Encryption Well is arranged and is in the second well row of former rhombic inverted nini-spot well pattern, the well location of the 3rd well row
It is staggered, array pitch is 75m, the second Encryption Well mining oil well inter-well distance is 250~300m；
Step 5：In the well of former rhombic inverted nini-spot well pattern the 3rd, row equidistantly encrypts two mouthfuls of water injection wells, by former two mouthfuls of producing wells
It is changed into metaideophone well, this row's well spacing is reduced into 250~300m.
Step 6：Four mouthfuls of producing wells are equidistantly encrypted between the 3rd well row, the 4th well row in former rhombic inverted nini-spot well pattern,
The 3rd Encryption Well row is formed, the 3rd Encryption Well row is in the 3rd well row of former rhombic inverted nini-spot well pattern, the well location of the 4th well row
It is staggered, array pitch is 75m, the mining oil well inter-well distance is 250~300m；
Step 7：Three mouthfuls of producing wells are equidistantly encrypted in the well of former rhombic inverted nini-spot well pattern the 4th row, this row's well spacing reduces
It is 250~300m；
Step 8：Four mouthfuls of water injection wells are equidistantly encrypted between the 4th well row, the 5th well row in former rhombic inverted nini-spot well pattern,
The 4th Encryption Well row is formed, the 4th Encryption Well row is in the 4th well row of former rhombic inverted nini-spot well pattern, the well location of the 5th well row
It is staggered, array pitch is 75m, row's water injection well inter-well distance is 250~300m；
Step 9：Two mouthfuls of producing wells are equidistantly encrypted on the well of former rhombic inverted nini-spot well pattern the 5th row, by former two mouthfuls of water fillings
Well is changed into turning extraction oil well, and this row's well spacing is reduced into 250~300m.
By the above-mentioned improvement to rhombic inverted nini-spot well pattern, anti-seven spot pattern structure 8 as shown in Figure 2 can be formed, should
The well spacing of anti-seven spot pattern is 146~168m, specifically, the well spacing of the anti-seven spot pattern can be any in the range of this
Number, certainly, according to the characteristic of actual oil reservoir, the well spacing can also adaptively change, and the application does not make specific herein
Limit.Wherein, the oil-water well number ratio of the anti-seven spot pattern structure 8 is 2:1.
The improvement well pattern structure based on rhombic inverted nini-spot well pattern provided in the application implementation method, by by rhombus anti-nine
Point well pattern is encrypted adjustment, increases producing well and water injection well, reduces oil-water well number ratio to 2:1, well space shortening increases oil well
Water filling by efficacious prescriptions to, rhombic inverted nini-spot well pattern structure is changed into the cryptographic structure of anti-seven spot pattern, realize former rhombus anti-nine
291 meters to 335 meters of the injector producer distance of point narrows down to 146 meters to 168 meters of the injector producer distance of anti-seven spot pattern；Simultaneously by producing well
Water filling is by efficacious prescriptions to bringing up to three directions from two；Involve plane more uniform, 9 wells anti-with the rhombus of prior art
Net is compared, and using the cryptographic structure of anti-seven spot pattern of the present utility model, can improve water drive control, is improved water-driven and is used
Degree, improves rate of oil production, improves stage recovery percent of reserves, and then improve the final waterflood recovery efficiency factor of oil reservoir and oil reservoir development
Economic benefit.
In one embodiment, on along the predetermined direction, the well spacing of the rhombic inverted nini-spot well pattern is L, row
Away from being H, then well spacing L is 3 times to 4.5 times of array pitch H.Specifically, on along the predetermined direction, anti-9 wells of rhombus
The well spacing of net is 500 meters to 600 meters.The array pitch of the rhombic inverted nini-spot well pattern is 150 meters.
It is general, on along well row direction 7, the distance between two mouthfuls of adjacent wells can be optimized by well spacing density or
Person's well spacing optimization come or calculate.Set the distance between above-mentioned adjacent two mouthfuls of wells for 500 meters to 600 meters when, both
Technical feasibility is considered, it is contemplated that economic benefit.If well spacing is too small, then well spacing density is too big, invests into
This height, the economic benefit that develops oil fields is too poor；It is opposite, if well spacing is too big, lose control of the sand body on stratum, cause water injection well with
Do not connected between producing well, that is, inject water drive and replace motionless in-place oil.Generally, the well spacing of rhombic inverted nini-spot well pattern can be with
It is 3~4.5 times of array pitch.
As shown in Fig. 2 in one embodiment, on along the predetermined direction, the well for improving well pattern structure
Away from being 250 meters to 300 meters, the array pitch for improving well pattern structure is 75 meters.
In the present embodiment, it is encrypted and transforms by the rhombic inverted nini-spot well pattern, so that by original rhombus
The well spacing of well pattern reduces half, and array pitch also reduces half.Well spacing is contracted to 250 meters extremely by original 500 meters to 600 meters
30；Array pitch is contracted to 75 meters by original 150 meters.Certainly, the well spacing and array pitch of the former diamond shaped pattern or encryption after row
Away from can adaptively be adjusted according to actual application environment, the application is not limited utterly herein.
Under a specific application scenarios, for example, for a certain low-permeability oil deposit of Daqing oil field, reservoir permeability 5~
10mD.The oil reservoir is developed using rhombic inverted nini-spot well pattern, specifically, the well pattern structure of the rhombic inverted nini-spot well pattern is referred to figure
Shown in 1.The well pattern has five row's wells, and row number, respectively 1,2,3,4 and 5 are followed successively by from top to bottom；Well row direction is between east and west
To.The upper inter-well distance of each row is 500m.It is 150m that well arranges the distance and well row between.The rhombic inverted nini-spot well pattern is changed into instead
The specific implementation step of the cryptographic structure of seven spot pattern includes：
Step 1), two mouthfuls of producing wells are equidistantly encrypted on the well of former rhombic inverted nini-spot well pattern first row, by former two mouthfuls of water fillings
Well is changed into turning extraction oil well, and this row's well spacing is reduced into 250m.
Step 2), four mouthfuls of water injection wells are equidistantly encrypted between the first and second well row of former rhombic inverted nini-spot well pattern, form encryption
The first row of well row.The Encryption Well arranges the well location arranged with first and second well of former rhombic inverted nini-spot well pattern in being staggered, and array pitch is equal
It is 75m, row's water filling inter-well distance is 250m.
Step 3), former rhombic inverted nini-spot well pattern second row equidistantly encrypts three mouthfuls of producing wells.This row's well spacing is reduced into
250m。
Step 4), four mouthfuls of producing wells are equidistantly encrypted between second and third well row of former rhombic inverted nini-spot well pattern, form encryption
The second row of well row.The Encryption Well arranges the well location arranged with second and third well of former rhombic inverted nini-spot well pattern in being staggered, and array pitch is equal
It is 75m.The mining oil well inter-well distance is 250m.
Step 5), the well of former rhombic inverted nini-spot well pattern the 3rd row equidistantly encrypts two mouthfuls of water injection wells, and former two mouthfuls of producing wells are become
It is metaideophone well.This row's well spacing is reduced into 250m.
Step 6), four mouthfuls of producing wells are equidistantly encrypted between third and fourth well row of former rhombic inverted nini-spot well pattern, form encryption
3rd row of well row.The Encryption Well arranges the well location arranged with third and fourth well of former rhombic inverted nini-spot well pattern in being staggered, and array pitch is equal
It is 75m.The mining oil well inter-well distance is 250m.
Step 7), the well of former rhombic inverted nini-spot well pattern the 4th row equidistantly encrypts three mouthfuls of producing wells.This row's well spacing is reduced into
250m。
Step 8), four mouthfuls of water injection wells are equidistantly encrypted between the fourth, fifth well row of former rhombic inverted nini-spot well pattern, form encryption
4th row of well row.The Encryption Well arranges the well location arranged with fourth, fifth well of former rhombic inverted nini-spot well pattern in being staggered, and array pitch is equal
It is 75m.Row's water injection well inter-well distance is 250m.
Step 9), the well of former rhombic inverted nini-spot well pattern the 5th row equidistantly encrypts two mouthfuls of producing wells, and former two mouthfuls of water injection wells are become
To turn extraction oil well.This row's well spacing is reduced into 250m.
Step 10), the well spacing of the anti-seven spot pattern for so being formed is 146m.
The improvement well pattern structure based on rhombic inverted nini-spot well pattern provided in the application implementation method, considers to keep away in the plane
The main stream line of east-west direction is opened, is specifically a kind of cryptographic structure that rhombic inverted nini-spot well pattern is changed into anti-seven spot pattern.Should
Improve the injection-production well that 291 meters of the injector producer distance of anti-9 points of original rhombus is narrowed down to well pattern structure anti-seven spot pattern to 335 meters (m)
Away from 146 meters to 168 meters；The water filling of producing well is brought up into three directions by efficacious prescriptions to from both direction simultaneously；Involve plane
It is more uniform, compared with the rhombic inverted nini-spot well pattern of prior art, using the cryptographic structure of anti-seven spot pattern of the present utility model,
10 percentage points of water drive control can be improved, 8 percentage points of water-flooding performance is improved, 2 percentages of rate of oil production are improved
Point, improves 4.0 percentage points of stage recovery percent of reserves, and then improve the economy of the final waterflood recovery efficiency factor of oil reservoir and oil reservoir development
Benefit.
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. a kind of improvement well pattern structure based on rhombic inverted nini-spot well pattern, the rhombic inverted nini-spot well pattern includes interval setting successively
And arranged along the first well row, the second well row, the 3rd well row, the 4th well row and the 5th well that predetermined direction extends, each described well
At least one first oil wells are provided with row, the line between all first oil wells can surround rhombus, in the rhombus
Heart position is provided with first water injection well, and the second water injection well is respectively arranged with first well row and the 5th well row, its
It is characterised by, the improvement well pattern structure includes：
Along the spaced encryption producing well of the predetermined direction on first well row；Water filling on the first well row
Well is changed into turning extraction oil well for what is recovered the oil；
The the first Encryption Well row set between first well row and the second well row, along described on the first Encryption Well row
Predetermined direction is arranged at intervals with encryption water injection well；
Along the spaced encryption producing well of the predetermined direction on second well row；
The the second Encryption Well row set between second well row and the 3rd well row, along described on the second Encryption Well row
Predetermined direction is arranged at intervals with encryption producing well；
Along the spaced encryption water injection well of the predetermined direction on the 3rd well row, on the 3rd well row first
Oil well is changed into the metaideophone well for water filling；
The 3rd Encryption Well row set between the 3rd well row and the 4th well row, along described on the 3rd Encryption Well row
Predetermined direction is arranged at intervals with encryption producing well；
Along the spaced encryption producing well of the predetermined direction on the 4th well row；
The 4th Encryption Well row set between the 4th well row, the 5th well row, along described on the 4th Encryption Well row
Predetermined direction is arranged at intervals with encryption water injection well；
Along the spaced encryption producing well of the predetermined direction on the 5th well row, the water filling on the 5th well row
Well is changed into turning extraction oil well for what is recovered the oil.
2. the improvement well pattern structure of rhombic inverted nini-spot well pattern is based on as claimed in claim 1, it is characterised in that：Along described
On predetermined direction, the well spacing of the rhombic inverted nini-spot well pattern is L, and array pitch is H, then well spacing L is 3 times to 4.5 times of array pitch H.
3. the improvement well pattern structure of rhombic inverted nini-spot well pattern is based on as claimed in claim 2, it is characterised in that：Along described
On predetermined direction, the well spacing of the rhombic inverted nini-spot well pattern is 500 meters to 600 meters.
4. the improvement well pattern structure of rhombic inverted nini-spot well pattern is based on as claimed in claim 2, it is characterised in that：The rhombus is anti-
The array pitch of nine-spot pattern is 150 meters.
5. the improvement well pattern structure of rhombic inverted nini-spot well pattern is based on as claimed in claim 3, it is characterised in that：Along described
On predetermined direction, the well spacing for improving well pattern structure is 250 meters to 300 meters.
6. the improvement well pattern structure of rhombic inverted nini-spot well pattern is based on as claimed in claim 4, it is characterised in that：The improvement well
The array pitch of web frame is 75 meters.
7. the improvement well pattern structure of rhombic inverted nini-spot well pattern is based on as claimed in claim 1, it is characterised in that：The improvement well
Web frame is anti-seven spot pattern structure.
8. the improvement well pattern structure of rhombic inverted nini-spot well pattern is based on as claimed in claim 7, it is characterised in that：Described anti-7 points
The well spacing of well pattern structure is 146 meters to 168 meters.
9. the improvement well pattern structure of rhombic inverted nini-spot well pattern is based on as claimed in claim 7, it is characterised in that：Described anti-7 points
The oil-water well number ratio of well pattern structure is 2:1.
10. the improvement well pattern structure of rhombic inverted nini-spot well pattern is based on as claimed in claim 1, it is characterised in that：The improvement
The permeability of oil reservoir is less than 50 millidarcies where well pattern structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621289164.1U CN206309377U (en) | 2016-11-29 | 2016-11-29 | Improvement well pattern structure based on rhombic inverted nini-spot well pattern |
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| CN112983387A (en) * | 2019-12-18 | 2021-06-18 | 中国石油天然气股份有限公司 | Injection and production well pattern deployment method and injection and production well pattern |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112983387A (en) * | 2019-12-18 | 2021-06-18 | 中国石油天然气股份有限公司 | Injection and production well pattern deployment method and injection and production well pattern |
| CN112983387B (en) * | 2019-12-18 | 2022-12-02 | 中国石油天然气股份有限公司 | Injection and production well pattern deployment method and injection and production well pattern |
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